Information terminal, intercom system, speech recognition system, control method, and control program

Abstract

The purpose of this disclosure is to seek improvements related to voice recognition functionality. The information terminal (10) disclosed herein includes a voice recognition unit (182), a control processing unit (183), and a communication unit (first communication unit 11). The voice recognition unit (182) performs voice recognition based on the sound input to the microphone (131). The control processing unit (183) performs control based on control commands identified by the voice recognition unit (182). The communication unit performs communication including calls with other terminals. The types of control commands for voice recognition performed by the voice recognition unit (182) are set according to the operating state of the unit.

Description

Information terminal, intercom system, voice recognition system, control method and program This disclosure generally relates to an information terminal, an intercom system, a voice recognition system, a control method, and a program. More specifically, this disclosure relates to an information terminal having communication functions including communication with other terminals, an intercom system equipped with the information terminal, a voice recognition system for communicating with the information terminal, a control method for the information terminal, and a control method and program for the voice recognition system. Japanese Patent Application Publication No. 2004-64249 (hereinafter referred to as "Document 1") discloses an intercom system for use in residential complexes. The intercom system in Document 1 includes a lobby intercom installed in the common entrance of the residential complex, a base intercom unit installed in each household, and a visual doorbell device installed outdoors (at the entrance) of each household. In this intercom system, a visitor uses the lobby intercom to call the main intercom unit. In response to the call, the resident performs a specified operation on the main intercom unit, initiating a conversation between the lobby intercom and the main intercom unit. Similarly, when the video doorbell sub-unit calls the main intercom unit, the resident performs a specified operation on the main intercom unit in response to the call, initiating a conversation between the video doorbell sub-unit and the main intercom unit. However, as a standard operation, there are systems that perform voice recognition based on the voices of residents in a household. When voice recognition is used in information terminals (such as intercom base stations) or intercom systems, improvements related to voice recognition functions, such as increased processing speed and accuracy, are desired. The present disclosure is made in view of the above circumstances, and its purpose is to provide an information terminal, an intercom system, a voice recognition system, a control method and a program that can seek improvements related to the voice recognition function. An information terminal according to one aspect of the present disclosure includes a voice recognition unit, a control processing unit, and a communication unit. The voice recognition unit recognizes voice based on voice input to a microphone. The control processing unit performs control based on control commands recognized by the voice recognition unit. The communication unit performs communications, including calls with other terminals. In the information terminal, the type of control command recognized by the voice recognition unit is set according to the terminal's operating state. An intercom system according to one aspect of the present disclosure includes the aforementioned information terminal and the aforementioned other terminals. One aspect of the present disclosure includes a voice recognition system comprising a communication unit for communicating with an information terminal and a voice recognition unit. The voice recognition unit recognizes voice input from a microphone of the information terminal when the communication unit receives the voice input. The voice recognition unit also recognizes control commands related to control performed by a control processing unit of the information terminal. The type of control command recognized by the voice recognition unit is determined based on the operating state of the information terminal. One aspect of the present disclosure relates to a control method for controlling an information terminal. The control method includes a voice recognition step, a control processing step, and a communication step. In the voice recognition step, voice recognition processing is performed based on voice input to a microphone. In the control processing step, control is performed based on control commands identified by the voice recognition step. In the communication step, communication is performed, including a call with another terminal. The type of control command identified by the voice recognition step is determined based on the operating state of the information terminal. One aspect of the present disclosure relates to a control method for controlling a voice recognition system. The control method includes a communication step with an information terminal and a voice recognition step. In the voice recognition step, when voice input from a microphone of the information terminal is received during the communication step, voice recognition processing is performed on the voice. In the voice recognition step, voice recognition is performed on control commands related to control performed by a control processing unit of the information terminal. The type of control command identified during the voice recognition step is determined based on the operating state of the information terminal. A program according to one aspect of the present disclosure is a program for causing one or more processors to execute any one of the control methods described above. The embodiments and variations described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments and variations. Even outside the following embodiments and variations, various changes can be made according to design, etc., as long as they do not depart from the scope of the technical concept of the present disclosure. (Embodiment) Hereinafter, an intercom system 1 including an information terminal 10 according to this embodiment will be described using Figures 1A to 9. The information terminal 10 operates as, for example, an intercom device. (1) Overview The information terminal 10 of this embodiment will be described below. The information terminal 10 of this embodiment is applied to the intercom system 1 as shown in FIG2 . The intercom system 1 is applied to, for example, a collective residence 5 such as an apartment. The intercom system 1 of this embodiment includes the information terminal 10. In this embodiment, the intercom system 1 includes a plurality of (two in FIG2 ) information terminals 10 each operating as an intercom device. The intercom system 1 further includes a lobby intercom 20 (intercom entrance device), a control device 30, and a plurality of (two in FIG2 ) entrance sub-units 40 (intercom entrance device; refer to FIG2 ). In other words, the intercom system 1 includes the information terminal 10 and other terminals (the lobby intercom 20 and / or the entrance sub-unit 40). In the intercom system 1, each of the plurality of information terminals 10 communicates with the lobby intercom 20 via a control device 30. Furthermore, in the intercom system 1, the plurality of information terminals 10 correspond one-to-one with the plurality of entrance sub-units 40. Furthermore, the intercom system 1 of this embodiment can be applied to residential buildings in addition to the residential complex 5. Alternatively, the intercom system 1 can be applied to non-residential facilities such as offices, shops, schools, and nursing facilities. In other words, the intercom system 1 can be used in facilities or collective facilities. If the "facility" is a "residential," it corresponds to a residential unit or a resident of a collective housing unit 5. If it is a "non-residential," it can correspond to an office, store, school, or nursing facility. Furthermore, a "collective facility" can be a collective housing unit 5 where multiple households (private units) gather, or a non-residential collective facility where multiple offices or stores (private units) gather. For example, it can be a complex facility with a non-residential lower floor and collective residential upper floors. Each of the plurality of information terminals 10 is, for example, a resident terminal (intercom master) installed in each of the plurality of households E2 included in the residential complex 5. Each information terminal 10 is assumed to be, for example, a residential information disk functioning as a room master installed in a room of each household E2. Each information terminal 10 is connected to the control device 30 via a second trunk line 62, a branch line 63, and a splitter 50. Each information terminal 10 is configured to communicate (e.g., perform conversations and send control signals) with the lobby intercom 20 via the control device 30. Furthermore, each information terminal 10 is connected to the corresponding entrance door handset 40 via a connection line 64. Each information terminal 10 is configured to communicate (e.g., perform conversations and send control signals) with the corresponding entrance door handset 40. The lobby intercom 20 is installed, for example, in the shared entrance hall (lobby) E1 of the residential complex 5. The lobby intercom 20 is connected to the control device 30 via the first trunk line 61. The lobby intercom 20 is configured to communicate (e.g., conduct conversations and transmit video signals) with each information terminal 10 via the control device 30. The lobby intercom 20 is mounted, for example, on a wall of the shared entrance hall E1. By transmitting video signals from the lobby intercom 20 to the information terminal 10, the information terminal 10 can display images. In summary, the information terminal 10 of this embodiment includes a communication unit (a first communication unit 11 and a third communication unit 19; see FIG1A ). The communication unit (the first communication unit 11 and the third communication unit 19) performs communication including conversations with other terminals (here, corresponding to the lobby intercom 20 and the entrance handset 40). The control device 30 is installed, for example, in the management room E3 of the residential complex 5. The control device 30 is connected to the lobby intercom 20 via a first trunk line 61 and to each information terminal 10 via a second trunk line 62. In other words, the control device 30 is configured to relay communications between each information terminal 10 and the lobby intercom 20. Each of the plurality of entrance handsets 40 is installed, for example, at the entrance of a household E2 of the residential complex 5. Each entrance handset 40 is connected to a corresponding information terminal 10 via a connection line 64. Each entrance handset 40 is configured to communicate with the corresponding information terminal 10 (e.g., to make calls, transmit video signals, etc.). In this embodiment, the first trunk line 61, the second trunk line 62, the branch line 63, and the connecting line 64 are all twisted-pair wires. That is, in reality, the first trunk line 61, the second trunk line 62, the branch line 63, and the connecting line 64 are composed of two wires, but are shown as a single wire in the diagram. At least one of the first trunk line 61, the second trunk line 62, the branch line 63, and the connecting line 64 may be a wire other than a twisted-pair wire. The information terminal 10 of this embodiment acquires the voice of a resident (hereinafter sometimes referred to as a "user") in household E2 and performs voice recognition on the acquired voice. Specifically, as shown in FIG1A , the information terminal 10 includes a voice recognition unit 182. Voice recognition unit 182 performs voice recognition based on the voice input to microphone 131. It is assumed that microphone 131 is provided in the information terminal 10 itself. The information terminal 10 controls the operation of the intercom system 1 based on the results of voice recognition. Specifically, as shown in FIG1A , the information terminal 10 further includes a control processing unit 183. The control processing unit 183 performs control based on the voice recognition results of the voice recognition unit 182. Specifically, the control processing unit 183 performs control based on control commands generated by the voice recognition unit 182 (e.g., control commands indicating successful voice recognition). In short, the information terminal 10 is configured to be voice-operated. For example, if the voice of a user in household E2 is determined to contain a keyword (command word) for a control command to open and close the entrance door 200 (door) located in the shared entrance E1 (voice recognition is successful), the information terminal 10 performs control corresponding to the command word. Specifically, when the voice recognition unit 182 detects "Unlock!" as a control command, the information terminal 10 performs unlocking control of the electric lock 201 for opening the entrance door 200 (see Figure 2). Here, the entrance door 200 is configured to be opened and closed by the electric lock 201 (see Figure 2). However, when an intercom device or an intercom system utilizes voice recognition, improvements in voice recognition functions such as increased processing speed and accuracy of voice recognition and improved user convenience are desired. Therefore, in one embodiment of the information terminal 10 disclosed herein, the voice recognition unit 182 is configured to perform voice recognition in a first manner or in a second manner that is simpler than the first manner. The voice recognition unit 182 performs voice recognition in the first manner in the standby state, and performs voice recognition in the second manner in the call state with another terminal (the lobby intercom 20 or the entrance sub-phone 40). That is, the voice recognition unit 182 of the information terminal 10 uses the first manner of voice recognition and the second manner of voice recognition in the standby state and the call state, respectively. In the above embodiment, in the call state with another terminal (the lobby intercom 20 or the entrance sub-phone 40), voice recognition is performed in the second manner that is simpler than the first manner of voice recognition. Therefore, the possibility of improving the processing speed related to voice recognition in the call state becomes higher, which can improve user convenience. As a result, the information terminal 10 has the advantage of seeking improvements related to the voice recognition function. Furthermore, the "standby state" refers to a state that is not in a call with another terminal, is not receiving a call from another terminal to the information terminal 10, and is not executing a prescribed operation mode. Details will be described later, but examples of "prescribed operation modes" include the crime prevention setting operation mode, the door monitor confirmation operation mode, and the video playback operation mode. In other words, the "standby state" primarily refers to a state in which only the voice recognition unit 182 (particularly the first voice recognition unit 1821 performing trigger voice recognition) and the microphone 131 are functioning. In addition, one form of the control method disclosed herein is a control method for controlling the information terminal 10. The control method includes a voice recognition step, a control processing step, and a communication step. In the voice recognition step, voice recognition processing is performed based on the voice input to the microphone 131. In the control processing step, control is performed based on the voice recognition result of the voice recognition step. In the communication step, communication including calls with other terminals (front hall intercom 20, entrance sub-machine 40) is performed. The voice recognition processing performs voice recognition in the first mode, or in the second mode which is simpler than the voice recognition in the first mode. The voice recognition processing performs voice recognition in the first mode in the standby state and in the second mode in the call state with other terminals. The control method in the above-mentioned one form has the advantage of seeking improvements related to the voice recognition function. The control method is used on a computer system (information terminal 10). That is, the control method can also be embodied by a program. A program according to one aspect of the present disclosure is a program for causing one or more processors to execute the control method according to one aspect. The program may be recorded on a non-transitory recording medium that is readable by a computer. Furthermore, in another aspect of the information terminal 10 disclosed herein, the type of control command recognized by the voice recognition unit 182 is set according to the operating state of the terminal. Therefore, in each operating state of the information terminal 10, when the voice recognition unit 182 identifies which control command (command word) is contained in the sound input to the microphone 131, the possibility of searching for all control commands as reference objects can be reduced. As a result, the processing speed and accuracy of the voice recognition can be improved. Consequently, the information terminal 10 of this alternative aspect has the advantage of achieving improvements in the voice recognition function. Furthermore, another form of the control method disclosed herein is a control method for controlling the information terminal 10. The control method includes a voice recognition step, a control processing step, and a communication step. In the voice recognition step, voice recognition processing is performed based on the voice input to the microphone 131. In the control processing step, control is performed based on the control instruction (for example, the control instruction for successful voice recognition) for the voice recognized in the voice recognition step. In the communication step, communication including calls with other terminals (the lobby intercom 20, the entrance sub-machine 40) is performed. The type of control instruction for the voice recognized in the voice recognition step is set according to the operating state of the information terminal 10. The above-mentioned other form of the control method has the advantage of seeking improvements related to the voice recognition function. The control method can be used on a computer system (information terminal 10). That is, the control method can also be embodied by a program. The program of another form of the present disclosure is a program for causing one or more processors to execute the above-mentioned other form of the control method. The program can be recorded on a non-temporary recording medium that can be read by a computer. In this embodiment, as an example, the information terminal 10 is assumed to be a resident terminal (intercom master), and the "other terminal" referred to in this disclosure is the lobby intercom 20 or the entrance sub-unit 40. However, the "other terminal" may also be the administrator's office master installed in the facility's administrator's office (here, for example, the management room E3). Furthermore, the information terminal 10 is not limited to a resident terminal (intercom master). For example, the information terminal 10 may be the administrator's office master, in which case the "other terminal" may be a resident terminal (intercom master) or the lobby intercom 20. Furthermore, the information terminal 10 may also be the lobby intercom 20 or the entrance sub-unit 40. Hereinafter, when referred to as “other terminals” unless otherwise specified, they refer to the front hall intercom 20 or the entrance door handset 40 . (2) Configuration (2-1) Information Terminal As shown in FIG1A , the information terminal 10 includes a first communication unit 11 , a second communication unit 12 , a sound acquisition unit 13 , an operation unit 14 , a sound output unit 15 , a display unit 16 , a storage unit 17 , a processing unit 18 , and a third communication unit 19 . The information terminal 10 (e.g., the processing unit 18) includes, for example, a microcomputer having a processor and memory. The processor executes a program stored in the memory, allowing the microcomputer to function as the information terminal 10. The program executed by the processor is pre-recorded in the microcomputer's memory, but it can also be recorded and provided on a non-transitory recording medium such as a memory card, or provided via an electrical communication line such as the Internet. The first communication unit 11 (communication unit) is a communication interface for communicating with the lobby intercom 20 (communication unit 21; refer to FIG2 ). That is, the first communication unit 11 performs communications including calls with other terminals (the lobby intercom 20). The first communication unit 11 is connected to the control device 30 via the second trunk line 62, the branch line 63, and the splitter 50. The first communication unit 11 sends voice signals, control signals, etc. to the lobby intercom 20 via the control device 30. Furthermore, the first communication unit 11 receives call signals, voice signals, image signals, etc. from the lobby intercom 20 via the control device 30. The second communication unit 12 is a communication interface for communicating with the outside world (here, server 70). The second communication unit 12 is connected to the server 70 via the network NT1. The second communication unit 12 can receive various information from the server 70. Furthermore, the control device 30 can also be connected to the network NT1 and the server 70 via a gateway, etc., and the information terminal 10 can also be connected to the server 70 via a branch line 63 and the control device 30. The third communication unit 19 (communication unit) is a communication interface for communicating with the entrance handset 40. Specifically, the third communication unit 19 performs communications, including calls with other terminals (entrance handset 40). The third communication unit 19 is connected to the entrance handset 40 via a connection line 64. The third communication unit 19 transmits audio signals and control signals to the entrance handset 40 and receives call signals, audio signals, and video signals from the entrance handset 40. The information terminal 10 can obtain at least three action states according to the communication status with the lobby intercom 20 and the entrance handset 40. The action states that the information terminal 10 of this embodiment can obtain include a call state, a conversation state, and a standby state. The action states that the information terminal 10 of this embodiment can obtain further include a mode action state. The call state is a state in which a call signal is received from the lobby intercom 20 or the entrance handset 40 and the call is received. The conversation state is a state in which communication can be established by talking with the lobby intercom 20 or the entrance handset 40. The mode action state is a state in which a prescribed action mode is executed. As described above, the prescribed action mode is an action mode for crime prevention settings, an action mode for confirmation by a door monitor, and an action mode for video playback. The standby state is a state that is neither a conversation state, nor a call state, nor a mode action state. Regarding the air conditioner and other equipment control operations and the scene control operations described later, for the information terminal 10, these are instantaneous operations that transmit an instruction signal to the outside world to instruct the control. The likelihood of maintaining these operations for a long period of time (e.g., more than one minute) is low. However, regarding the air conditioner and other equipment control operations and the scene control operations, when the execution state for the information terminal 10 is long, they can also correspond to the above-mentioned mode operation state. For example, when the scene control includes an operation mode for executing video playback ("Action Example 6" described later), the scene control (video playback) operation mode can also be the above-mentioned operation mode. The sound acquisition unit 13 acquires at least sound including the user's voice and outputs sound information (sound data) of the acquired sound to the processing unit 18. The sound acquisition unit 13 includes a microphone 131 (see FIG1A ). The sound acquisition unit 13 converts ambient sound including the user's voice (sound) input to the microphone 131, which is located in front of the information terminal 10, into an analog sound signal (sound information) and outputs the signal to the processing unit 18. The sound output unit 15 includes a speaker 151. When the information terminal 10 is in a state where communication with the lobby intercom 20 is possible (in a call state), the speaker 151 outputs sound (including the voice of a visitor, etc.) based on the sound signal (sound data) transmitted from the lobby intercom 20. When the information terminal 10 is in a state where communication with the entrance handpiece 40 is possible (in a call state), the speaker 151 outputs sound (including the voice of a visitor, etc.) based on the sound signal (sound data) transmitted from the entrance handpiece 40. Furthermore, the speaker 151 outputs various audio messages or electronic sounds stored in the memory unit 17, for example, depending on the status of the information terminal 10. 1A shows two microphones 131. That is, the sound acquisition unit 13 includes two microphones 131 (a first microphone 1311 and a second microphone 1312). The first microphone 1311 and the second microphone 1312 are respectively arranged at the upper left and right parts when viewed from the front of the information terminal 10. In particular, the first microphone 1311 is located farther from the speaker 151 than the second microphone 1312. In other words, the first microphone 1311 is a far-end microphone. The information terminal 10 of this embodiment utilizes the user's voice input to the first microphone 1311 as audio data for a call, for example, when communicating with another terminal. The audio input to the first microphone 1311 is primarily processed for the call and then transmitted to the other terminal. Specifically, by utilizing the audio from the remote first microphone 1311 rather than the second microphone 1312 as audio data for the call, the (visitor's) voice output from the speaker 151 is prevented from looping back around the microphone 131. On the other hand, the information terminal 10 of this embodiment utilizes the user's voice input to the first microphone 1311 and the second microphone 1312 as audio data for voice recognition, for example. In particular, the processing unit 18 utilizes the two microphones 131 to perform beamforming processing to improve the directivity of the sound collection direction. Based on the user's voice input from the first microphone 1311 and the second microphone 1312, the processing unit 18 estimates whether the user is speaking to the information terminal 10 from the left or right direction. Furthermore, based on this estimation result, the processing unit 18 performs processing to increase sensitivity to sound signals from a specific direction. The operation unit 14 is configured to receive user operations. As shown in FIG1B , the operation unit 14 includes an answer operation unit 141 (call operation unit), an end operation unit 142, and an unlock operation unit 143. Furthermore, the operation unit 14 includes a button (home operation unit) for displaying the home screen on the display unit 16. In other words, the information terminal 10 includes a response operation unit 141 that accepts a response operation for answering a call to the information terminal 10 from another terminal. The response operation unit 141 is an operation unit (button) for initiating communication with the lobby intercom 20 or the entrance handset 40 (a conversation with a visitor, etc.) in response to a call from the lobby intercom 20 or the entrance handset 40. For example, if the response operation unit 141 is operated while the first communication unit 11 is receiving a call signal for calling a resident (a calling state), a voice call can be established between the lobby intercom 20 and the information terminal 10. In other words, the information terminal 10 further includes at least one of an end operation unit 142 and an unlock operation unit 143 (in this embodiment, both). The end operation unit 142 accepts an end operation to end a call with another terminal. The unlock operation unit 143 accepts an unlock operation to unlock an electric lock 201 installed on a door (here, a hallway door 200 installed in a shared hallway E1; see FIG2 ) for entering and exiting the facility (here, the residential complex 5) where the information terminal 10 is installed. Specifically, for example, if the end operation unit 142 is operated while the first communication unit 11 is communicating with the lobby intercom 20 (in a call state), the voice call with the lobby intercom 20 is terminated. Alternatively, for example, if the unlock operation unit 143 is operated while the first communication unit 11 is communicating with the lobby intercom 20 (in a call state), an unlock signal for unlocking the electric lock 201 is transmitted from the information terminal 10 via the control device 30. As a result, the electric lock 201 is unlocked, allowing the visitor to open the entrance door 200 and enter the shared entrance E1. In this embodiment, if the information terminal 10 has not automatically terminated the voice communication with the lobby intercom 20 after the unlocking operation unit 143 is operated to unlock the electric lock 201, the voice communication may be automatically terminated upon the unlocking of the electric lock 201. Furthermore, the lobby intercom 20 may have a communication unit (electric lock communication unit) separate from the communication unit 21, and the electric lock communication unit may be connected to the electric lock 201. In this case, when the information terminal 10 performs unlock control, an unlock signal is output from the lobby intercom 20 to the electric lock 201, thereby unlocking the electric lock 201. In this embodiment, as an example, the response operation section 141, the end operation section 142, the unlock operation section 143, and the home page operation section are implemented using a capacitive touch sensor disposed around the display section 16 on the front surface of the housing of the information terminal 10. That is, the user simply touches the response operation section 141, the end operation section 142, the unlock operation section 143, and the home page operation section with a fingertip to receive the operation input. However, the response operation section 141, the end operation section 142, the unlock operation section 143, and the home page operation section are not limited to being implemented using a touch sensor; at least some of these operations may also be implemented using a push-button switch. The display unit 16 is, for example, a liquid crystal display. The display unit 16 is configured to display images. When the information terminal 10 is in a state where it can communicate with the lobby intercom 20, the display unit 16 displays the image captured by the lobby intercom 20, which is the communication partner. When the information terminal 10 is in a state where it can communicate with the entrance handheld device 40, the display unit 16 displays the image captured by the entrance handheld device 40, which is the communication partner. In addition, when the information terminal 10 has a touch panel display, the touch panel display can also serve as both the display unit 16 and a part of the operation unit 14, for example. In addition, the display unit 16 displays the home screen, the setting screen, and screens corresponding to each action state. The memory unit 17 includes a first memory unit 171 and a second memory unit 172. The first memory unit 171 and the second memory unit 172 are respectively composed of readable and writable memories. The first memory unit 171 and the second memory unit 172 are respectively, for example, flash memories. The memory unit 17 stores, for example, dictionary files used for voice recognition (trigger dictionary D0, command dictionary D1; refer to FIG1A). The dictionary file can be downloaded and stored from the server 70. The dictionary file includes information based on at least one of the types of languages ​​(Japanese, English, etc.) that the voice recognition unit 182 can recognize, the expression method in the same language (dialects, tones, etc.), and the speaker in the same language (male, female, children, elderly, etc.). Hereinafter, the dictionary file based on at least one of the types of languages ​​(Japanese, English, etc.) that the voice recognition unit 182 can recognize, the expression method in the same language, and the speaker in the same language is referred to as a dictionary file based on language information. Furthermore, the memory unit 17 stores information on the screen displayed on the display unit 16, information on audio messages, and various setting information, in addition to the dictionary files. Trigger dictionary D0 is a dictionary containing trigger words. A trigger word is a specified keyword that triggers the detection of a control command's command word. Command dictionary D1 is a dictionary containing control command's command words. As shown in FIG1A , command dictionary D1 includes a first dictionary D11 and a second dictionary D12. In this embodiment, the trigger word is a keyword pre-determined by the information terminal 10 or the party providing the dictionary file (e.g., the manufacturer of the information terminal 10). The trigger word, for example, is the product name of the information terminal 10, or its abbreviation, and is preferably a short character. The user of the information terminal 10 can also set the trigger word to their preferred character on the information terminal 10 settings screen. Furthermore, in FIG. 4 , for example, when a resident says "00, answer!", "00" corresponds to the trigger word, and "Answer!" following "00" corresponds to the command word of the control command. In this embodiment, as an example, the trigger dictionary D0 is stored in the first storage unit 171 , and the command dictionary D1 (the first dictionary D11 and the second dictionary D12 ) is stored in the second storage unit 172 . As shown in FIG. 1A , the processing unit 18 includes a voice processing unit 181 , a voice recognition unit 182 , a control processing unit 183 , a display processing unit 184 , and a call processing unit 185 . The sound processing unit 181 receives the analog sound signal input from the first microphone 1311 and output from the sound acquisition unit 13 for voice communication, and converts it into a digital sound signal. Furthermore, the sound processing unit 181 is configured to perform filtering processing on the sound signal input from the first microphone 1311 and output from the sound acquisition unit 13. The sound processing unit 181 includes, for example, an echo canceller. The echo canceller suppresses or removes the echo from the sound signal output from the microphone 131. Furthermore, the sound processing unit 181 receives the sound signal input from the first microphone 1311 and the second microphone 1312 and output from the sound acquisition unit 13 for voice recognition, and performs the aforementioned beamforming processing. The voice recognition unit 182 performs voice recognition based on the sound input to the microphone 131 (in this embodiment, the first microphone 1311 and the second microphone 1312). In other words, the voice recognition unit 182 performs voice recognition processing based on the sound acquired by the sound acquisition unit 13. The voice recognition unit 182 performs voice recognition processing on the sound processed by the voice processing unit 181 using the dictionary files (trigger dictionary D0 and command dictionary D1) stored in the memory unit 17. The voice recognition unit 182 of this embodiment performs voice recognition in the first mode or in a second mode that is simpler than the first mode. The voice recognition unit 182 performs voice recognition in the first mode in the standby state and in the second mode in the call state with another terminal. Here, the "first method" refers to a method of performing trigger sound recognition to determine whether the sound input to microphone 131 contains a trigger word, and performing command sound recognition if the trigger word is contained. Command sound recognition is the sound recognition of control commands related to the control performed by control processing unit 183, that is, the recognition of which command word is contained. On the other hand, the "second method" refers to a method of performing command voice recognition instead of trigger voice recognition on the voice input to the microphone 131. In short, since the second method omits the processing of trigger voice recognition, it can be said to be "simpler" than the first method in this respect. Furthermore, in this embodiment, the "first method" refers to a method in which the control processing unit 183 performs voice recognition (first command voice recognition) of a control command (first control command) related to a predetermined control performed in the standby state based on the first dictionary D11. The "predetermined control" referred to here primarily refers to controls other than those related to calls, which will be described later. On the other hand, the "second method" is a method in which the control processing unit 183 performs voice recognition (second command voice recognition) of control commands related to specific controls performed during a call (second control commands) based on the second dictionary D12. The "specific controls" mentioned here primarily refer to controls related to calls, which will be described later. That is, in this embodiment, the dictionary files used for voice recognition are changed in the first dictionary D11 and the second dictionary D12 in the standby state and the call state. Furthermore, the number of first control commands registered in the first dictionary D11 is set to be greater than the number of second control commands registered in the second dictionary D12. In short, because the second method references (searches) fewer command words registered in the first dictionary D11 than in the second dictionary D12, it can be considered "simpler" than the first method in this respect. That is, the voice recognition unit 182 is configured to perform voice recognition processing not only when the information terminal 10 and the lobby intercom 20 (or the entrance sub-unit 40) are communicating (in a call state), but also when the information terminal 10 is in a standby state. Furthermore, the voice recognition unit 182 is configured to be able to perform voice recognition processing even in a call state from another terminal and in the above-mentioned mode operation state. In short, even if the information terminal 10 is not in a call state with another terminal, it is still in a state where the microphone 131 can receive sound. Here, the sound recognition unit 182 includes a first sound recognition unit 1821 for performing trigger sound recognition, and a second sound recognition unit 1822 for performing command sound recognition (see FIG1A ). That is, in this embodiment, the portion (circuit) for performing sound recognition processing related to the trigger word and the portion (circuit) for performing sound recognition processing related to the command word are installed separately. When the information terminal 10 is in standby mode, it mainly monitors whether the first sound recognition unit 1821 for performing trigger sound recognition and the sound acquisition unit 13 are in an active state (activated state, i.e., a state in which power is consumed), and whether a sound containing the trigger word is input to the microphone 131. Conversely, when the information terminal 10 is in standby mode, the second sound recognition unit 1822 for performing command sound recognition and the control processing unit 183 (hereinafter also referred to as "the second sound recognition unit 1822, etc.") are in an inactive state (an inactive state, i.e., a state in which no power is consumed, or a dormant state in which power consumption is suppressed). The first voice recognition unit 1821 monitors the voice processed by the voice processing unit 181 by referencing (searching) the trigger voice recognition in the trigger dictionary D0 to determine whether the voice contains the trigger word. If the first voice recognition unit 1821 determines that the voice contains the trigger word (trigger word detection), the information terminal 10 activates the second voice recognition unit 1822 and other units, enabling voice recognition of the control command. For example, a response command (e.g., a command word "answer") is set as a control command related to the control performed by the control processing unit 183. The response command is used to answer a call from another terminal to the information terminal 10. In this embodiment, the user needs to speak a trigger word before the response command. When the information terminal 10 determines that the trigger word is included, the second voice recognition unit 1822 and other units are set to an active state, enabling voice recognition of the response command. In addition to the detection of the trigger word, even if a call is received from the lobby intercom 20 or the entrance handset 40, or a touch operation is accepted on the operating unit 14 or the display unit 16, the information terminal 10 can also set the second voice recognition unit 1822 and the like to the active state. Second voice recognition unit 1822 identifies command voices by referencing (searching) the first dictionary D11 or the second dictionary D12, and monitors the voice processed by voice processing unit 181 to determine whether a command word is included. If second voice recognition unit 1822 determines that a command word is included (command word detection), it outputs the command word (control command) to control processing unit 183. The second sound recognition unit 1822 is in an invalid state until the first sound recognition unit 1821 recognizes that the trigger word is included in the standby state. That is, in this embodiment, the parts (processing circuits) for trigger sound recognition and command sound recognition are separated, and the second sound recognition unit 1822 is set to an invalid state before the trigger word is recognized. Moreover, when the trigger word is recognized in the standby state, the second sound recognition unit 1822 becomes a state in which the command sound can be recognized (valid state). Therefore, the processing speed of the sound recognition unit 182 is sought to be improved. In addition, the power consumption of the second sound recognition unit 1822 can be suppressed. The "inactive state" of the second voice recognition unit 1822 mentioned here means that the second voice recognition unit 1822 is in an inactive state, that is, it is assumed to be in a state where it does not consume power, or in a dormant state where power consumption is suppressed. However, the "inactive state" of the second voice recognition unit 1822 may also be a state where the processing of command voice recognition is suspended even if the second voice recognition unit 1822 is in an active state. There are exceptions to the situation where the second voice recognition unit 1822 is in an inactive state before recognizing a trigger word in the standby mode. For example, when a user receives a control request by directly touching the operation unit 14, the second voice recognition unit 1822 may be in an active state (i.e., capable of recognizing command voices even without a trigger word) in the standby mode. The control processing unit 183 performs control based on the voice recognition results of the voice recognition unit 182. In other words, the control processing unit 183 performs control based on the control command (e.g., a control command indicating successful voice recognition) recognized by the voice recognition unit 182. Here, the control processing unit 183 performs control corresponding to the voice recognition results (control commands) obtained from the second voice recognition unit 1822. The control processing unit 183 also notifies the user of the success or failure of voice recognition through sound or display (e.g., output of an electronic sound or voice message, lighting or flashing of a display light, or display of a message on the screen of the display unit 16). In short, when the information terminal 10 is in standby mode, if a trigger word is detected with reference to the trigger dictionary D0, the second sound recognition unit 1822, etc. is switched from inactive to active, and the sound recognition of the command word is performed with reference to the first dictionary D11 (first mode). Furthermore, when the information terminal 10 is in a call state, the second dictionary D12 is referred to and only the sound recognition of the command word is performed (second mode). In addition, when the information terminal 10 receives a call, it switches from the first dictionary D11 to the second dictionary D12. Furthermore, when the information terminal 10 is in a call state, when a trigger word is detected, the second sound recognition unit 1822, etc. is switched from inactive to active, and the sound recognition of the command word is performed with reference to the second dictionary D12. Thereafter, the information terminal 10 switches from the first mode to the second mode and performs sound recognition. That is, the timing of switching the reference target from the first dictionary D11 to the second dictionary D12, the timing of switching the second voice recognition unit 1822 from inactive to active, and the timing of switching from the first mode to the second mode are different. However, at least two of these three timings may be the same. When a response command (control command) is recognized in response to a call from another terminal (voice recognition is successful), the control processing unit 183 controls the operation of the information terminal 10 to initiate communication (a call) with the other terminal. For example, the control processing unit 183 controls the first communication unit 11 (or the third communication unit 19) to establish communication and enable a call between the information terminal 10 and the lobby intercom 20 (or the entrance handset 40). Before the communication (call) between the information terminal 10 and the other terminal ends, or before the electric lock 201 of the entrance door 200 (see FIG. 2 ) is unlocked, the voice recognition unit 182 performs only command voice recognition in the second mode. That is, the voice recognition unit 182 does not perform trigger voice recognition before the communication (call) ends or before the electric lock 201 is unlocked. Furthermore, if no sound is input to microphone 131 for a predetermined period (e.g., several minutes) while the voice recognition unit 182 is performing voice recognition in the second mode, it automatically switches to the first mode. At this point, the call between the information terminal 10 and the other terminal is also automatically terminated. Therefore, since the device switches to the first mode even without user voice input, the possibility of the device being left in the second mode is reduced, user convenience is improved, and improvements related to voice recognition functionality are sought. The call processing unit 185 outputs the voice data (sound information) for the call obtained by the sound acquisition unit 13 to a device operated by the person to whom the call is directed. For example, when the information terminal 10 is in a call with another terminal, the user's voice input to the first microphone 1311 is used as the voice data for the call. The voice input to the first microphone 1311 is mainly processed for the call in the call processing unit 185 and then sent to the other terminal in the call. That is, by using the voice of the first microphone 1311 at the far end instead of the second microphone 1312 as the voice data for the call, the voice (of the visitor) output from the speaker 151 is suppressed from looping around the microphone 131. Specifically, the call processing unit 185 sends the signal from which the noise has been suppressed or removed by the sound processing unit 181 to the front hall intercom 20 (or the entrance handphone 40) via the first communication unit 11 (or the third communication unit 19). For example, when the information terminal 10 communicates with the lobby intercom 20 , the call processing unit 185 transmits the signal of the sound data from which noise has been suppressed or removed by the sound processing unit 181 to the lobby intercom 20 via the first communication unit 11 . The display processing unit 184 performs processing to display images captured by the intercom entrance device (the lobby intercom 20 and the entrance handheld device 40) with which the communication is conducted on the display unit 16. Furthermore, the display processing unit 184 performs processing to display the home screen, the settings screen, and screens corresponding to various operating states. Table 1 below shows a list of specific control commands (command words) and the control events (operation events) associated with each control command. Control commands and operation events are associated and stored in memory unit 17. The "Dictionary" column on the right side of Table 1 displays the dictionary in which the corresponding command words are registered. [Table 1] The command words shown in Table 1 are merely examples and are not intended to be limiting. As shown in Table 1, the number of command words in the second dictionary D12 is less than that in the first dictionary D11. Furthermore, as shown in Table 1, the operation events corresponding to the command words in the second dictionary D12 are narrowed down to those related to intercom control, particularly those with a high correlation to "calls." Conversely, it can be easily understood that the operation events corresponding to the command words in the first dictionary D11 are narrowed down to those related to controlling devices other than intercom devices, scene control, and functional control within intercom control that has a low correlation to "calls." Furthermore, below, operation events with a high correlation to "calls" will sometimes be referred to as "call-related operation events." Call-related operation events include those related to receiving calls from other terminals, answering calls, disconnecting calls (ending calls), and unlocking the electric lock 201 of the entrance door 200 (see Figure 2). In the information terminal 10 , the action control performed by voice input (voice operation) of the control command in Table 1 can also be performed by touch operation input to the operation unit 14 or the display unit 16 . When the control processing unit 183 receives a voice message containing a control command as shown in Table 1 and the second voice recognition unit 1822 recognizes the voice message (successful voice recognition), it identifies the corresponding operation event and controls the target device (including the local device). If the operation event is related to intercom control, the target device to be controlled is the local device (information terminal 10) or the electric lock 201 of the entrance door 200 (see FIG. 2 ). For example, while the information terminal 10 is communicating (in a call) with the lobby intercom 20, the information terminal 10 receives a voice command (voice input) containing the command "end" from the user. In this case, the second voice recognition unit 1822 determines that the voice processed by the voice processing unit 181 contains the command "end." The control processing unit 183 controls the operation of disconnecting the call between the terminal and the lobby intercom 20. Alternatively, if the end operation unit 142 receives a touch operation from the user instead of a voice input, the control processing unit 183 also controls the action of disconnecting the call. For example, while the information terminal 10 is communicating with the lobby intercom 20 (during a call), the information terminal 10 receives a voice command containing the command "unlock" from the user as a control command (voice input). In this case, the second voice recognition unit 1822 determines that the voice processed by the voice processing unit 181 contains the command "unlock." The control processing unit 183 controls the unlocking operation of the electric lock 201 of the entrance door 200 for entering the room from the shared entrance E1. For example, the control processing unit 183 controls the control device 30 in a manner that allows the electric lock 201 of the entrance door 200 for entering the room from the shared entrance E1 to unlock the room. Alternatively, if the unlocking operation unit 143 receives a touch operation from the user instead of a voice input, the control processing unit 183 also controls the unlocking of the electric lock 201 of the entrance door 200 . In addition to its intercom function, the information terminal 10 also has a disaster prevention function for activating a fire alarm when a fire is detected, a crime prevention function for activating an alarm when a suspicious intruder is detected, and a function for displaying various daily life information. Furthermore, the information terminal 10 has a communication function for communicating with the outside world (here, the server 70). For example, the "Crime Prevention Settings" shown in Table 1 refers to a setting for turning on the alert mode using the aforementioned crime prevention function. In addition, regarding machine control or scene control, for example, it is assumed that the information terminal 10 is communicatively connected to the controller of the HEMS (Home Energy Management System) installed in each household E2. The HEMS controller is controllably connected to the electrical devices (air conditioners, lighting devices, air purifiers, range hoods, etc.) shown in Table 1. In short, regarding machine control or scene control, the controlled object device can be an electrical device that can be controlled by the HEMS controller. When a control command related to machine control or scene control is received by voice input, the information terminal 10 can control the corresponding electrical device through the HEMS controller. In other words, the information terminal 10 has a configuration that allows the user to easily and appropriately use a first mode in which a trigger word is spoken and then a command word is spoken continuously (for example, within a few seconds of a comma), and a second mode in which a command word is spoken alone. Furthermore, for operation events other than those related to machine control, scene control, and intercom control (such as those related to crime prevention settings or video playback), the information terminal 10 executes control when a voice operation is accepted in the first mode. On the other hand, for operation events related to intercom control, the information terminal 10 executes control when a voice operation is accepted in both the first and second modes. In other words, for operation events related to intercom control, even if a trigger word is included, the information terminal 10 does not perform trigger voice recognition. If the correct command word is subsequently included, the control is executed. However, if a user performs voice operation in the first mode while on a call, the other party (for example, a visitor) is more likely to know the trigger word, potentially reducing security. Furthermore, for the other party on the call, if the trigger word sounds abrupt during the call, it will be unnatural and may feel awkward. Therefore, as a processing method of the information terminal 10, the user is recommended to use the second mode of voice operation, which is to speak the command word alone during the call. In addition, the voice recognition unit 182 can also perform trigger voice recognition processing even during the call. When the trigger word is detected, the information terminal 10 can display a message on the display unit 16 indicating that the trigger word has been recorded during the call. Furthermore, in this embodiment, the control commands recognized by the voice recognition unit 182 include command words that are set by the same word across multiple operational states. For example, in Table 1, the "end" command word is set by the same word in both the conversation state (and call state) and the mode operation state in which a predetermined action is executed. This "end" command word is registered in both the first dictionary D11 and the second dictionary D12 (see Table 1). Even if the control commands recognized by the voice recognition unit 182 are the same word, the control processing unit 183 performs different controls depending on the operational state of the local terminal (information terminal 10). Specifically, for example, the control content of the "end" command word varies depending on the operational state of the information terminal 10 when the user utters it. When the information terminal 10 is in the conversation state, if the voice recognition of the "end" command word is successful, the call is terminated. When the information terminal 10 is in the state of executing the door monitor confirmation action, if the voice recognition of the "end" command word is successful, the door monitor confirmation action is terminated. Furthermore, when the information terminal 10 successfully recognizes the voice command "end" during the video playback operation, it controls the video playback operation to end. By using the same command word to set multiple operation states, the number of control command words that the user needs to remember can be reduced, thereby improving user convenience. The information terminal 10 is configured so that, by opening a setting screen through a touch operation on the operating unit 14 or the display unit 16, the dictionary files referenced for voice recognition (trigger dictionary D0, command dictionary D1) and the corresponding control events (operation events) can be changed. Furthermore, the information terminal 10 preferably supports at least one of the following: additional languages ​​(such as Japanese and English), additional expression methods within a language (such as dialects), and additional speakers within a language (such as males, females, children, and the elderly). Furthermore, the information terminal 10 can also download update data related to the dictionary files from the server 70, for example, to update the dictionary files in the memory unit 17. (2-2) Lobby Intercom As shown in FIG. 2 , the lobby intercom 20 includes a communication unit 21 , a control unit 22 , a communication unit 23 , a display unit 24 , an operation unit 25 , a storage unit 26 , and a camera unit 27 . The lobby intercom 20 includes, for example, a microcomputer having a processor and memory. The processor executes a program stored in the memory, allowing the microcomputer to function as the control unit 22. The program executed by the processor is pre-recorded in the microcomputer's memory, but can also be stored on a non-transitory recording medium such as a memory card or provided via an electrical communication line such as the Internet. The communication unit 21 is a communication interface for communicating with the information terminal 10 (the first communication unit 11). The communication unit 21 is connected to the control device 30 (the communication unit 31) via the first trunk line 61. The communication unit 21 sends call signals, audio signals, and video signals to the information terminal 10 via the control device 30. Furthermore, the communication unit 21 receives audio signals and control signals from the information terminal 10 via the control device 30. Here, the communication signal from the lobby intercom 20 includes information for a specific information terminal 10 (such as address information). Therefore, only the information terminal 10 assigned address information that matches the address information included in the communication signal can receive the communication signal. The control unit 22 is configured to control the communication unit 21 , the communication unit 23 , the imaging unit 27 , and the like. The communication unit 23 includes a speaker and a microphone, and is configured to enable communication with the information terminal 10 . The display unit 24 is, for example, a liquid crystal display. The display unit 24 is configured to display the image captured by the camera unit 27. Furthermore, the display unit 24 is configured to display a message to the visitor, etc. The message is, for example, a message for prompting the visitor, etc. to speak. The display unit 24 displays, for example, a message such as "Please speak." In this case, the same voice message can also be output (announced) from the speaker of the conversation unit 23 or a speaker provided separately from the speaker of the conversation unit 23. Furthermore, the display unit 24 and the speaker can be used together. In addition, when the lobby intercom 20 is equipped with a touch panel display, the touch panel display can also serve as both the display unit 24 and the operation unit 25. The operation unit 25 is configured to receive operations from visitors, residents, etc. to the residential complex 5. The operation unit 25 is, for example, an input interface including a plurality of push button switches and a touch panel. The memory unit 26 is composed of a readable and writable memory. The memory unit 26 is, for example, a flash memory. The memory unit 26 stores, for example, image data of images captured by the camera unit 27. The camera unit 27 is a camera equipped with an imaging element for capturing images of subjects (such as visitors). In this embodiment, the imaging area (field of view) of the camera unit 27 is set to the area in front of the lobby intercom 20. In this embodiment, the camera unit 27 captures moving images. Furthermore, in this embodiment, the camera unit 27 captures color images. Alternatively, the camera unit 27 may capture still images (a still camera) or monochrome images. The imaging element is, for example, a two-dimensional image sensor such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) image sensor. The imaging unit 27 uses an optical system such as a lens to image light from a subject onto the imaging surface (light-receiving surface) of the imaging element. The imaging element then converts the light from the subject into an electrical signal. The imaging unit 27 then outputs the output signal from the imaging element as an image signal to the control unit 22. (2-3) Control Device As shown in FIG. 2 , the control device 30 includes a communication unit 31 , a control unit 32 , and a storage unit 33 . The control device 30 comprises, for example, a microcomputer having a processor and memory. The processor executes a program stored in the memory, allowing the microcomputer to function as the control unit 32. The program executed by the processor is pre-recorded in the microcomputer's memory, but can also be recorded and provided on a non-transitory recording medium such as a memory card, or provided via an electrical communication line such as the Internet. The communication unit 31 includes each information terminal 10 and a communication interface for communicating with the lobby intercom 20. The communication unit 31 is connected to the lobby intercom 20 via a first trunk line 61 and to each information terminal 10 via a second trunk line 62. Specifically, the communication unit 31 is configured to relay communications between each information terminal 10 and the lobby intercom 20. Furthermore, the communication unit 31 is connected to the electric lock 201 of the entrance door 200 and is configured to communicate with the electric lock 201. The control unit 32 is configured to control the communication unit 31. The control unit 32 controls the unlocking operation of the electric lock 201 of the entrance door 200 according to the instruction from the information terminal 10. For example, the control unit 32 outputs an unlocking signal to the electric lock 201 via the communication unit 31, indicating unlocking. The memory unit 33 is composed of a readable and writable memory. The memory unit 33 is, for example, a flash memory. The memory unit 33 stores, for example, a correspondence table indicating the correspondence between the room number assigned to each resident E2 and the address information assigned to each information terminal 10. Specifically, in the control device 30, the control unit 32 refers to the correspondence table, creates a signal that replaces the room number contained in the signal from the lobby intercom 20 with the address information of the corresponding information terminal 10, and transmits this signal from the communication unit 31 to each information terminal 10. Furthermore, in each information terminal 10, when the address information contained in the signal received by the first communication unit 11 matches the address information stored in the memory unit 17, the processing unit 18 obtains the information contained in the signal. Furthermore, in each information terminal 10, when the address information contained in the signal received by the first communication unit 11 matches the address information stored in the memory unit 17, the processing unit 18 discards the information contained in the signal. In addition, in this embodiment, although the communication unit 31 is connected to the electric lock 201 , the present invention is not limited thereto. The control device 30 may also include a communication unit different from the communication unit 31 , and the different communication unit may be connected to the electric lock 201 . (2-4) Hallway Handsets As shown in FIG2 , each hallway handset 40 is connected to a corresponding information terminal 10 via a connection line 64 . The hallway handset 40 transmits call signals, audio signals, and video signals to the information terminal 10 . Furthermore, the hallway handset 40 receives audio signals and control signals from the information terminal 10 . (3) Operation The operation of the information terminal 10 will be described while listing operation examples 1 to 6 and referring to FIG. 3 to FIG. 9 . (3-1) Operation Example 1 Hereinafter, an operation example (operation example 1) of the information terminal 10 related to the "call-related" operation event among the operation events of intercom control will be described with reference to FIG. 3 and FIG. 4 . FIG3 is a flowchart related to Example 1. FIG4 is a conceptual diagram showing a series of actions of the information terminal 10, including standby mode, call reception (incoming call), call answering (answering), ongoing call, unlocking of the electric lock 201 (unlocking), call termination (hanging up), and return to standby mode, arranged in chronological order from left to right along with the screen of the display unit 16. Furthermore, the upper portion of FIG4 shows the actions of the information terminal 10 when the user requests control by operating the information terminal 10 using a touch operation (denoted as "button" in FIG4) on the operating unit 14 (or display unit 16). On the other hand, the lower portion of FIG4 shows the actions of the information terminal 10 using a voice operation (denoted as "voice" in FIG4) on the microphone 131. FIG3 is a flowchart for the case of voice operation. First, the "Lock Screen or Home" in FIG4 indicates that the information terminal 10 is in a standby state. In the standby state, the information terminal 10 displays a lock screen with the brightness of the display unit 16 turned down to reduce power consumption, or displays a home screen (denoted as "Home" in FIG4 ) on the display unit 16. In standby mode, if an incoming call (incoming call) is received, for example, from the lobby intercom 20, the information terminal 10 emits an incoming call tone from the speaker 151 to notify the user of the incoming call. Furthermore, the information terminal 10 displays an incoming call screen on the display unit 16 indicating the incoming call status (call status). Furthermore, when an incoming call occurs, the information terminal 10 switches the dictionary referenced during voice recognition from the first dictionary D11 to the second dictionary D12, which contains registered command words corresponding to the operation event associated with the call. Here, the user can answer the call by touching the answering operation unit 141 (denoted as the "talk button" in FIG. 4 ) while the information terminal 10 is in the calling state (the state of receiving a call signal from another terminal). Specifically, when the information terminal 10 receives a touch operation on the answering operation unit 141, the calling state switches to the talking state, allowing the user to talk (answer) the call with the person operating the lobby intercom 20. The information terminal 10 changes the incoming call screen displayed on the display unit 16 to the talking screen (screen transition). On the other hand, the user can answer the call even by performing a voice operation on the microphone 131 while the information terminal 10 is in the call state. As shown in Figure 4, the user speaks the trigger word "00, answer!" and the command word (answer command) in the call state. When the first voice recognition unit 1821 successfully recognizes the voice of the trigger word "00", the information terminal 10 sets the second voice recognition unit 1822 and other units to the active state. Furthermore, when the second voice recognition unit 1822 successfully recognizes the voice of the subsequent "Answer!", the information terminal 10 switches from the call state to the call state and can communicate (answer) with the person operating the lobby intercom 20. At this time, because the second voice recognition unit 1822 performs voice recognition with reference to the second dictionary D12, the voice recognition processing speed is fast. To notify the user that the input of the answer command has been accepted (i.e., the voice input was successful), the information terminal 10 outputs an electronic "beep" sound from the speaker 151. In addition, if the information terminal 10 cannot detect a valid command word within a predetermined time (e.g., 3 seconds) after detecting the trigger word, it outputs a voice message "Unable to recognize the command." In this case, for example, the information terminal 10 returns the second voice recognition unit 1822 and other components to an inactive state. As an example, the information terminal 10 switches the voice recognition mode from the first mode to the second mode when switching from the call state to the conversation state. In other words, the voice recognition unit 182 (when performing voice recognition in the first mode) switches to the second mode by accepting the response operation of the response operation unit 141. Furthermore, the voice recognition unit 182 switches to the second mode by receiving a voice recognition response command (the voice recognition of the response command is successful) when performing voice recognition in the first mode. In this way, since the switch to the second mode is achieved by the response operation of the response operation unit 141 or the speaking of the response command, the convenience of the user is improved. Reference is made to the flowchart of Figure 3 here. The information terminal 10 determines whether it is in a call (call state) (step ST1). If it is in a call (step ST1: YES), it waits for the command word (step ST2). On the other hand, if the information terminal 10 is not in a call, such as in a standby state or a call state (step ST1: NO), it waits for the trigger word (step ST3). If the voice recognition of the trigger word is successful, that is, if the authentication of the trigger word is successful (authentication successful (OK)?; step ST4: YES), the information terminal 10 waits for the command word (step ST2). As long as the voice recognition of the trigger word is unsuccessful when not in a call, that is, the authentication of the trigger word fails (authentication successful?; step ST4: NO), the information terminal 10 returns to the original step ST1. In addition, in order to facilitate understanding of the explanation, the flowchart shows the processing flow only when voice operation is considered, and it is not limited to this if touch operation is applied. During a call, a call screen is displayed on the display unit 16. During a call, the user can unlock the electric lock 201 by touching the unlocking operation unit 143 (denoted as the "unlock button" in FIG. 4 ) to invite a visitor into the entrance door 200. Specifically, when the information terminal 10 receives a touch operation on the unlocking operation unit 143 during a call, the control device 30 executes unlocking control (unlocking) of the electric lock 201. The information terminal 10 displays a message indicating that the unlocking control of the electric lock 201 has been executed on the call screen displayed on the display unit 16. On the other hand, the user can unlock the electric lock 201 even if he / she performs a voice operation on the microphone 131 while the information terminal 10 is in a call state. As shown in Figure 4, the user speaks the command word "Unlock!" (unlock command) while in a call state. The unlock command is an instruction for unlocking the electric lock 201 installed on the door (entrance door 200) for entering and exiting the facility (collective residence 5) where the information terminal 10 is installed. When the second voice recognition unit 1822 successfully recognizes the voice of "Unlock!", the information terminal 10 executes the unlocking control (unlocking) of the electric lock 201 through the control device 30. At this time, because the second voice recognition unit 1822 performs voice recognition with reference to the second dictionary D12, the processing speed of the voice recognition process is fast. In order to notify the user that the input of the unlock command has been accepted (i.e., the voice input is successful), the information terminal 10 outputs an unlocking sound from the speaker 151 that reminds the user of the unlocking of the electric lock. In the example of FIG4 , the information terminal 10 maintains the call state even after the electric lock 201 is unlocked. The user touches the end operation part 142 (denoted as the "end key" in FIG4 ) to end the call state, thereby hanging up. That is, when the information terminal 10 is in the call state (the state of having a voice call with another terminal), when the touch operation on the end operation part 142 is accepted, the call disconnection control with the lobby intercom 20 is executed (hang up). The information terminal 10 changes the call screen displayed on the display unit 16 to the lock screen screen (or the home screen) (screen transition). In addition, the information terminal 10 can also automatically execute the call disconnection control with the lobby intercom 20 by unlocking the electric lock 201. On the other hand, the user can hang up the call even if he / she performs a voice operation on the microphone 131 while the information terminal 10 is in a call state. As shown in Figure 4, the user says the command word "End!" (end command) while in a call state. The end command is a command used to end a call with another terminal. When the second voice recognition unit 1822 successfully recognizes the voice of "End!", the information terminal 10 executes the disconnection control (hang up) of the call with the lobby intercom 20. At this time, since the second voice recognition unit 1822 performs voice recognition with reference to the second dictionary D12, the processing speed of the voice recognition process is fast. In order to notify the user that the input of the end command has been accepted (i.e., the voice input is successful), the information terminal 10 outputs an electronic sound of "beep" and a voice message of "ended" from the speaker 151. As control commands related to the control performed by the control processing unit 183, at least one of an end command and an unlock command (here, both) is set. In Operation Example 1, upon executing the hang-up sequence, the information terminal 10 switches the dictionary referenced during voice recognition from the second dictionary D12 to the first dictionary D11, which contains command words corresponding to operation events other than call-related operation events. Furthermore, upon executing the hang-up sequence, the information terminal 10 switches the voice recognition mode from the second mode to the first mode. Furthermore, upon executing the hang-up sequence, the information terminal 10 disables the second voice recognition unit 1822 and other components. In other words, when the voice recognition unit 182 is in a call with another terminal, it switches to the first mode of voice recognition by accepting a termination operation on the termination operation unit 142. Furthermore, when the voice recognition unit 182 receives a voice recognition termination command (successful voice recognition of the termination command) while in a call with another terminal, it switches to the first mode of voice recognition. Thus, since the switch to the first mode is accomplished by a termination operation or a spoken termination command on the termination operation unit 142, user convenience is improved. However, the information terminal 10 can also automatically execute the call disconnection control by unlocking the electric lock 201. In this case, the voice recognition unit 182 can switch to the state of performing voice recognition in the first mode by accepting the unlock operation of the unlock operation unit 143 while in a call with another terminal. In addition, the voice recognition unit 182 can switch to the state of performing voice recognition in the first mode by voice recognition of the unlock command (the voice recognition of the unlock command is successful) while in a call with another terminal. In this way, since the switch to the first mode is achieved by the unlock operation of the unlock operation unit 143 or the speaking of the unlock command, the convenience of the user is improved. In Operation Example 1, the timing for switching from the second dictionary D12 to the first dictionary D11, the timing for switching from the second mode to the first mode, and the timing for switching the second voice recognition unit 1822 to the inactive state are all the same. However, some or all of these timings may be different. For example, at least one of these timings may be the same as the timing for executing unlocking. In this example 1, the flow of a series of actions from incoming call to hanging up is described for the case where only touch operation is performed on the operating unit 14 (the upper part of FIG. 4 ) and the case where only voice operation is performed on the microphone 131 (the lower part of FIG. 4 ). However, the information terminal 10 can also support a usage method that combines touch and voice operation, such as answering a call with touch operation, unlocking with voice operation, and ending the call with touch operation, or answering a call with voice operation, unlocking with touch operation, and ending the call with voice operation. In the first operation example, the voice recognition unit 182 performs voice recognition in the first mode when the user receives a call from another terminal to the data terminal 10. In other words, the user needs to say the trigger word "00" before saying the answer command in the call state. However, the voice recognition unit 182 can also perform voice recognition in the second mode when the information terminal 10 is in a call state, in addition to being in a call state with another terminal. For example, the information terminal 10 can switch to the second mode of voice recognition when an incoming call is received. In this case, when answering a call in the call state, the user only needs to speak the answer command instead of the trigger word. When the information terminal 10 is in a calling state, the image of the visitor captured by the camera unit 27 of the lobby intercom 20 is displayed in real time on the incoming call screen of the display unit 16. Sometimes, when the user sees the visitor displayed on the incoming call screen of the display unit 16 and realizes that the visitor is a salesperson or a stranger, or has important matters that cannot be put aside, he or she does not want to answer the call and wants to cancel the call. In this case, the information terminal 10 cancels the call in the calling state, for example, by a touch operation on the end operation unit 142 or a voice operation of the end command. In addition, when the information terminal 10 cancels the call, in order to avoid giving the visitor a sense of distrust, the lobby intercom 20 can automatically notify the user of the failure of the call, such as being unable to answer due to being out, by voice or image, for example. Furthermore, when the user is in a calling state and sees the caller displayed on the incoming call screen of the display unit 16 and knows that the caller is a family member or acquaintance, there is a case where the user skips talking to the caller and unlocks the electric lock 201 and invites the caller to the entrance door 200. In this case, the information terminal 10 cancels the call while the electric lock 201 is unlocked, for example, by a touch operation on the unlocking operation unit 143 for unlocking the electric lock 201 or a voice operation of the unlocking command. Even if the state of performing voice recognition in the second mode is switched when an incoming call occurs, the voice recognition unit 182 can switch to the state of performing voice recognition in the first mode by canceling the call. (3-2) Action Example 2 The following describes an action example (action example 2) of the information terminal 10 related to the "crime prevention setting" (see Table 1) corresponding to an operation event other than "call-related" among the operation events of intercom control, with reference to FIG. 5A and FIG. 5B. FIG5A is a conceptual diagram showing a series of operations of the information terminal 10 from the standby state to the execution of the crime prevention setting, arranged in chronological order from the left together with the screen of the display unit 16. FIG5A is a conceptual diagram showing a series of operations of the information terminal 10 from the standby state to the execution of the crime prevention setting, 5B is a conceptual diagram showing a series of operations of the information terminal 10, arranged in chronological order from the left, from the state in which the crime prevention setting is being executed (hereinafter referred to as the "alert state") to the state in which the crime prevention setting is released, together with the screen of the display unit 16. The alert state is one of the mode operation states. The upper sections of Figures 5A and 5B are similar to the upper section of Figure 4 , showing the operation of the information terminal 10 when the user requests control by operating the information terminal 10 through a touch operation on the operating unit 14 (or the display unit 16 ). Meanwhile, the lower sections of Figures 5A and 5B are similar to the lower section of Figure 4 , showing the operation of the information terminal 10 when the user requests control by operating the information terminal 10 through a voice operation on the microphone 131 . First, the "lock screen" in Figure 5A shows that the information terminal 10 is in a standby state. In the standby state, the screen of the display unit 16 of the information terminal 10 becomes, for example, a lock screen. When the information terminal 10 is in standby mode, the user can access (activate) the home screen by touching one of the home operating sections (denoted as the "home button" in FIG. 5A ). The home screen displays menus for requesting various action controls. For example, a user can perform a crime prevention setting action by touching the screen area labeled "Crime Prevention Settings" (denoted as the "Crime Prevention Key" in FIG. 5A ) on the home screen. Specifically, when the information terminal 10 receives a touch operation requesting the start of "Crime Prevention Settings" in the standby mode, it switches from the standby mode to the alert mode, which is one of the mode action states. On the other hand, when the user is in the standby state of the information terminal 10, even if he performs a voice operation on the microphone 131, he can also perform the crime prevention setting action. As shown in Figure 5A, the user speaks the trigger word "00, alert setting" and the command word (control command) in the standby state. When the first voice recognition unit 1821 successfully recognizes the voice of the trigger word "00", the information terminal 10 sets the second voice recognition unit 1822 and the like to the active state. Furthermore, when the second voice recognition unit 1822 successfully recognizes the voice of the next "alert setting", the information terminal 10 switches from the standby state to the alert state. In addition, during the alert state, the voice recognition unit 182 maintains the first dictionary D11 for the reference dictionary and performs voice recognition in the same way as in the standby state. In addition, during the alert state, the voice recognition unit 182 performs trigger voice recognition in the same way as in the standby state, and performs voice recognition in the first way of performing command voice recognition when the trigger word is included. In order to inform the user that the input of the control command for the crime prevention setting has been accepted (i.e., the voice input is successful), the information terminal 10 outputs a voice message "Entering the alert state in ** seconds..." from the speaker 151. During the alert state, the information terminal 10 displays a screen indicating "Crime Prevention Alarm" on the display unit 16, as shown in FIG5B . During the alert state, the information terminal 10 monitors detection signals from sensors installed on the windows of the resident E2, etc., and issues an alarm if a suspicious intrusion through the window, etc. is detected. This crime prevention setting can be set, for example, before the user goes to bed or before leaving the house. Subsequently, while in the alert state, the user can access (activate) the home screen by touching the home operation portion (denoted as the "home button" in FIG. 5B ). For example, the user can cancel the crime prevention setting by touching the screen area displayed on the home screen for "Cancel Crime Prevention Settings" (denoted as the "Crime Prevention Button" in FIG. 5B ). Specifically, when the information terminal 10 receives a touch operation requesting the cancellation of the currently executing "Crime Prevention Settings" while in the alert state, the alert state is canceled and the device returns to its original standby state. On the other hand, the user can cancel the crime prevention setting even if he / she performs a voice operation on the microphone 131 in the alert state. As shown in FIG5B , the user says the trigger word and the command word (control command) "00, cancel the alert setting" in the alert state. The second sound recognition unit 1822 and the like can maintain the active state during the alert state, and can also temporarily return to the inactive state before the next trigger word is successfully recognized during the alert state. When the first sound recognition unit 1821 successfully recognizes the sound of the trigger word and the second sound recognition unit 1822 successfully recognizes the sound of "cancel the alert setting", the alert state is switched to the standby state, and the home screen is displayed from the display unit 16. In order to notify the user that the input of the control command to cancel the crime prevention setting has been accepted (i.e., the voice input is successful), the information terminal 10 outputs a voice message of "the alert state has been canceled" from the speaker 151. In addition, if no operation input is accepted within a certain period of time after the home screen starts to be displayed, the information terminal 10 becomes a lock screen. Thus, in Operation Example 2, the information terminal 10 does not switch the voice recognition method and dictionary, but directly performs voice recognition using the first method and the first dictionary D11. In action example 2, the information terminal 10 can also correspond to a usage method that combines touch operation and voice operation, such as executing the crime prevention setting action by touch operation and canceling the action by voice operation, or executing the crime prevention setting action by voice operation and canceling the action by touch operation. (3-3) Action Example 3 The following describes an action example (Action Example 3) of the information terminal 10 related to "Door Monitor Confirmation" (see Table 1) corresponding to an operation event other than "Call-Related" among intercom control operation events, with reference to FIG6 . The door monitor confirmation mentioned here refers to, for example, confirming a real-time image captured by the door monitor (camera unit) of the entrance sub-unit 40 on the screen of the display unit 16 of the information terminal 10. FIG6 is a conceptual diagram showing a series of information terminal 10 operations from the standby state to the state in which the door monitor confirmation operation is executed and the door monitor confirmation operation is completed (hereinafter referred to as the "monitor confirmation state"), arranged in chronological order from left to right along with the screen of the display unit 16. The monitor confirmation state is one of the mode operation states. The upper portion of FIG. 6 is similar to the upper portion of FIG. 4 , showing the operation of the information terminal 10 when the user requests control by operating the information terminal 10 through a touch operation on the operating unit 14 (or the display unit 16 ). Meanwhile, the lower portion of FIG. 6 is similar to the lower portion of FIG. 4 , showing the operation of the information terminal 10 when the user requests control by operating the information terminal 10 through a voice operation on the microphone 131 . First, the "lock screen" in Figure 6 shows that the information terminal 10 is in a standby state. In the standby state, the screen of the display unit 16 of the information terminal 10 becomes, for example, a lock screen. When the information terminal 10 is in standby mode, the user can access (activate) the home screen by touching one of the home operating sections (denoted as the "home button" in FIG. 6 ). For example, the user can perform a door monitor confirmation operation by touching the image area (represented as the play icon in FIG. 6 ) on the home screen that displays the image for starting the door monitor. Specifically, when the information terminal 10 receives a touch operation requesting the start of "door monitor confirmation" in the standby mode, it switches from the standby mode to the monitor confirmation mode, which is one of the mode operation modes. On the other hand, while the information terminal 10 is in standby mode, the user can perform a door monitor confirmation operation even by performing a voice operation on the microphone 131. As shown in Figure 6, the user speaks the trigger word "00, let me check the door monitor!" and the command word (control command) in the standby mode. When the first voice recognition unit 1821 successfully recognizes the voice of the trigger word "00," the information terminal 10 sets the second voice recognition unit 1822 and the like to the active state. Furthermore, when the second voice recognition unit 1822 successfully recognizes the voice of the subsequent "Let me check the door monitor," the information terminal 10 switches from the standby mode to the door monitor confirmation mode. Furthermore, during the monitor confirmation mode, the voice recognition unit 182 maintains the first dictionary D11 as the reference dictionary and performs voice recognition, just as in the standby mode. Furthermore, during the monitor confirmation mode, the voice recognition unit 182 performs trigger voice recognition just as in the standby mode, and performs voice recognition in the first mode of performing command voice recognition when the trigger word is included. In order to notify the user that the input of the control command confirmed by the door monitor has been accepted (ie, the voice input is successful), the information terminal 10 outputs an electronic sound of "beep" from the speaker 151. During the monitor confirmation state ("playing" in FIG. 6 ), the information terminal 10 causes the display unit 16 to display the real-time image captured by the door monitor of the entrance sub-machine 40 (denoted as "monitor screen" in FIG. 6 ). Subsequently, the user can terminate the door monitor confirmation operation by, for example, touching the end operation portion 142 (denoted as the "end key" in FIG. 6 ) (which also accepts the call termination operation) in the monitor confirmation state. Specifically, when the information terminal 10 receives a touch operation requesting the termination of the ongoing "door monitor confirmation" in the monitor confirmation state, the monitor confirmation is terminated and the device returns to the original standby state. On the other hand, the user can end the door monitor confirmation action even if he or she performs voice operation on the microphone 131 in the monitor confirmation state. As shown in Figure 6, the user says the trigger word and the command word (control command) "00, end!" in the monitor confirmation state. The second sound recognition unit 1822 and the like can maintain an active state during the monitor confirmation state, and can also temporarily return to an inactive state before the next trigger word is successfully recognized during the monitor confirmation state. When the first sound recognition unit 1821 successfully recognizes the sound of the trigger word and the second sound recognition unit 1822 successfully recognizes the sound of "end", the monitor confirmation state is ended, the state is switched to the standby state and the lock screen is set. In order to notify the user that the input of the control command to end the door monitor confirmation has been accepted (i.e., the voice input is successful), the information terminal 10 outputs an electronic sound of "beep" and a voice message of "ended" from the speaker 151. Thus, in Operation Example 3, the information terminal 10 does not switch the voice recognition method and dictionary, but directly performs voice recognition using the first method and the first dictionary D11. In action example 3, the information terminal 10 can also correspond to a usage method that combines touch operation and voice operation, such as executing the door monitor confirmation action by touch operation and ending the action by voice operation, or executing the door monitor confirmation action by voice operation and ending the action by touch operation. (3-4) Action Example 4 The following describes an action example (Action Example 4) of the information terminal 10 related to "recording playback" (see Table 1) corresponding to an operation event other than "call-related" among intercom control operation events, with reference to FIG7 . The recording playback mentioned here refers to, for example, playback of a video image captured by the camera unit 27 of a visitor calling the information terminal 10 via the lobby intercom 20, as well as a recorded message conveying important information from the visitor. FIG7 is a conceptual diagram showing a series of operations of the information terminal 10 from the standby state to the state in which the video playback operation is executed and the video playback operation is completed (hereinafter referred to as the "video playback state"), arranged in chronological order from left to right along with the screen of the display unit 16. The video playback state is one of the mode operation states. The upper portion of FIG. 7 is similar to the upper portion of FIG. 4 , showing the operation of the information terminal 10 when the user requests control by operating the information terminal 10 through a touch operation on the operating unit 14 (or the display unit 16 ). Meanwhile, the lower portion of FIG. 7 is similar to the lower portion of FIG. 4 , showing the operation of the information terminal 10 when the user requests control by operating the information terminal 10 through a voice operation on the microphone 131 . First, the "lock screen" in Figure 7 shows that the information terminal 10 is in a standby state. In the standby state, the screen of the display unit 16 of the information terminal 10 becomes, for example, a lock screen. When the information terminal 10 is in standby mode, the user can access (activate) the home screen by touching one of the home operating sections (denoted as the "home button" in FIG. 7 ). For example, the user can initiate video playback by touching the image area on the home screen that displays the start of video playback (denoted as the play icon in FIG. 7 ). Specifically, when the information terminal 10 receives a touch operation requesting the start of video playback while in standby mode, it switches from the standby mode to the video playback mode, which is one of the operating modes. On the other hand, when the user is in the standby state of the information terminal 10, the video playback operation can be performed even if the user performs a voice operation on the microphone 131. As shown in Figure 7, the user speaks the trigger word "00, play video" and the command word (control command) in the standby state. When the first sound recognition unit 1821 successfully recognizes the sound of the trigger word "00", the information terminal 10 sets the second sound recognition unit 1822 and the like to the active state. Furthermore, when the second sound recognition unit 1822 successfully recognizes the sound of the subsequent "play video", the information terminal 10 switches from the standby state to the video playback state. In addition, during the video playback state, the sound recognition unit 182 maintains the first dictionary D11 for the reference dictionary and performs sound recognition in the same way as in the standby state. In addition, during the video playback state, the sound recognition unit 182 performs trigger sound recognition in the same way as in the standby state, and performs sound recognition in the first mode of performing command sound recognition when the trigger word is included. In order to inform the user that the input of the video playback control command has been accepted (ie, the voice input is successful), the information terminal 10 outputs a voice message "There is unread information. Play the video." from the speaker 151. During the video playback state ("playing" in FIG. 7 ), the information terminal 10 outputs the video-recorded image of the visitor and the audio-recorded voice of the visitor from the display unit 16 and the speaker 151 (represented as "playing screen" in FIG. 7 ). Subsequently, when the user wants to end playback (or while playback is in progress), the user can terminate the video playback by, for example, touching the end operation unit 142 (denoted as the "end key" in FIG. 7 ) (which also accepts a call end operation). That is, when the information terminal 10 receives a touch operation requesting the termination of the ongoing "video playback" in the video playback state, the video playback state is terminated and the device returns to the original standby state. On the other hand, the user can end the video playback even if he performs a voice operation on the microphone 131 in the video playback state. As shown in Figure 7, the user says the trigger word "00, end!" and the command word (control command) in the video playback state. The second sound recognition unit 1822 and the like can maintain an active state during the video playback state, and can also temporarily return to an inactive state before the next trigger word is successfully recognized during the video playback state. When the first sound recognition unit 1821 successfully recognizes the sound of the trigger word and the second sound recognition unit 1822 successfully recognizes the sound of "end", the video playback state is ended, switched to the standby state and set to the lock screen. In order to notify the user that the input of the control command to end the video playback has been accepted (i.e., the voice input is successful), the information terminal 10 outputs an electronic sound of "beep" and a voice message of "ended" from the speaker 151. Thus, in Operation Example 4 as well, the information terminal 10 does not switch the voice recognition method and dictionary, but directly performs voice recognition using the first method and the first dictionary D11. In operation example 4, the information terminal 10 can also support a usage method that combines touch operation and voice operation, such as executing the video playback operation by touch operation and ending the operation by voice operation, or executing the video playback operation by voice operation and ending the operation by touch operation. (3-5) Action Example 5 The following describes an action example (Action Example 5) of the information terminal 10 related to an "air conditioner" (see Table 1) corresponding to an operation event controlled by a machine other than an intercom, with reference to FIG8 . The air conditioner referred to here refers to one of a plurality of machines installed in the resident E2 and controllable via the HEMS controller. FIG8 is a conceptual diagram showing, along with the screen of display unit 16, a series of operations of information terminal 10, arranged in chronological order from left to right, from standby mode to execution of air conditioning control operations (e.g., the control operation of turning on and operating the air conditioner). In Operation Example 5, the description of the control operation of stopping the air conditioner (stopping operation) is omitted. The upper portion of FIG8 , similar to the upper portion of FIG4 , shows the operation of the information terminal 10 when the user requests control by performing a touch operation on the operating unit 14 (or the display unit 16 ). Meanwhile, the lower portion of FIG8 , similar to the lower portion of FIG4 , shows the operation of the information terminal 10 when the user performs a voice operation on the microphone 131 . First, the "lock screen" in Figure 8 shows that the information terminal 10 is in a standby state. In the standby state, the screen of the display unit 16 of the information terminal 10 becomes, for example, a lock screen. When the information terminal 10 is in the standby state, the user can call (start) the home screen by touching one of the home operating parts of the operating part 14 (denoted as "home button" in FIG8 ). For example, the user touches the image area (denoted as "operation" in FIG8 ) on the home screen that displays the operation of starting machine control. In this way, the screen for selecting the machine to be controlled is displayed on the display unit 16 (denoted as "machine controller screen" in FIG8 ). The user can perform the action of air conditioning control by touching the image area displayed as "air conditioning" on the machine controller screen. That is, when the information terminal 10 receives a touch operation requesting the start of the "action of air conditioning control" in the standby state, the action for air conditioning control is performed. Specifically, the information terminal 10 sends an instruction signal to the controller of the HEMS for operating the specified air conditioner. When receiving the instruction signal, the controller of the HEMS controls (turns on the control) in such a way that the specified air conditioner operates. On the other hand, when the user is in the standby state of the information terminal 10, the air conditioning control action can be performed even if the user performs a voice operation on the microphone 131. As shown in Figure 8, the user speaks the trigger word "00, turn on the air conditioner" and the command word (control command) in the standby state. When the first sound recognition unit 1821 successfully recognizes the sound of the trigger word "00", the information terminal 10 sets the second sound recognition unit 1822 and the like to the active state. Furthermore, when the second sound recognition unit 1822 successfully recognizes the sound of the next "turn on the air conditioner", the information terminal 10 performs the air conditioning control action and enters the standby state again. In addition, the sound recognition unit 182 also maintains the first dictionary D11 for the reference dictionary and performs sound recognition for the air conditioning control action. In addition, the sound recognition unit 182 also performs trigger sound recognition for the air conditioning control action, and performs sound recognition in the first mode of performing command sound recognition when the trigger word is included. Although not shown in FIG. 8 , it is preferred that the information terminal 10 outputs an electronic sound of “beep” from the speaker 151 in order to notify the user that the input of the control command for the air-conditioning control operation has been accepted (ie, the voice input is successful). Thus, in Operation Example 5, the information terminal 10 does not switch the voice recognition method and dictionary, but directly performs voice recognition using the first method and the first dictionary D11. (3-6) Action Example 6 Hereinafter, referring to FIG. 9 , an action example (action example 6) of the information terminal 10 related to the event "return home operation" which is not intercom control but scene control will be described. In addition, it is assumed here that the instruction word "I'm back" corresponding to the operation event when returning home is associated with the execution of the action of "recording and playing" described in action example 4. In other words, when the user says the instruction word "I'm back", the information device 10 executes the action of "recording and playing" described in action example 4. That is, when the information terminal 10 accepts a touch operation requesting to start scene control in the standby state, it switches from the standby state to the recording and playing state which is one of the mode action states. Although detailed descriptions are omitted here, the corresponding actions of the information terminal 10 are set and stored in the memory unit 17 of the information terminal 10 along with the scenario numbers for each scenario control command shown in Table 1. The user can modify the scenario control-related settings as appropriate on the setting screen of the display unit 16 of the information terminal 10. FIG9 is a conceptual diagram showing a series of operations of the information terminal 10 from the standby state to the execution of the scene control operation (here, the video playback operation), arranged in chronological order from left to right together with the screen of the display unit 16. The upper portion of Figure 9, similar to the upper portion of Figure 4, illustrates the actions of the information terminal 10 when the user requests control by operating the information terminal 10 through a touch operation on the operating unit 14 (or display unit 16). Furthermore, the upper portion of Figure 9 shares the same flow from "Lock Screen" to "Playing" in the upper portion of Figure 7, referenced in the description of Action Example 4. Therefore, the description of the actions of executing video playback through touch operation on the operating unit 14 (or display unit 16) will be omitted. The lower section of FIG. 9 is similar to the lower section of FIG. 4 , and shows the operation of the information terminal 10 when the operation method is a voice operation on the microphone 131 . First, the "lock screen" in Figure 9 shows that the information terminal 10 is in a standby state. In the standby state, the screen of the display unit 16 of the information terminal 10 becomes, for example, a lock screen. When the user is in the standby state of the information terminal 10, even if he performs a voice operation on the microphone 131, he can also perform the scene control action. As shown in Figure 9, the user says the trigger word "00, I'm back!" and the command word (control command) in the standby state. When the first sound recognition unit 1821 successfully recognizes the sound of the trigger word "00", the information terminal 10 sets the second sound recognition unit 1822 and others to the active state. Furthermore, when the second sound recognition unit 1822 successfully recognizes the sound of "I'm back" that is then spoken, the information terminal 10 performs the video playback action as a scene control corresponding to "I'm back" (the operation event when returning home). In order to notify the user that the input of the control command of the scene control has been accepted (i.e., the voice input is successful), the information terminal 10 outputs a voice message "Welcome back. There is unread information. Play the video." from the speaker 151. In the example of Figure 9, the information terminal 10 outputs a message from speaker 151 asking, "Do you want to set scene * (scene control number)?" In contrast, by the user responding with "Yes" or "No" (see "Other" in Table 1), the information terminal 10 can accept changes to the scene control number settings. In short, by outputting inquiry messages to the user at a predetermined timing (or after accepting any operation), the information terminal 10 can accept changes to various setting information in an interactive manner. Furthermore, the command "I'm back" corresponding to the operation event upon returning home can be associated with, in addition to video playback, lighting devices (on control) or operating the air conditioner (on control). In this case, as a scenario control associated with "I'm back," the information terminal 10 sends an instruction signal to the HMES controller to also perform these on-controls. The display unit 16 may or may not display the control results of the lighting devices and air conditioner. Thus, in operation example 6, the information terminal 10 does not switch the voice recognition method and dictionary, but directly performs voice recognition using the first method and the first dictionary D11. (4) Advantages of the First and Second Methods As described above, in the information terminal 10 of this embodiment, when in a call with another terminal, voice recognition is performed using the second method, which is simpler than the first method. Therefore, the processing speed associated with voice recognition during a call is likely to be increased, thereby improving user convenience. Consequently, the information terminal 10 has the advantage of being able to improve its voice recognition function. Furthermore, when in a call with another terminal, because voice recognition is performed in the second mode without trigger voice recognition, the user does not need to say a trigger word during the call, which can reduce the user's stress. As a result, the convenience of the user can be improved. Furthermore, if the trigger word is known to people other than the user, there is a concern that security will be reduced, but in the information terminal 10, there is no need for a trigger word when in a call with another terminal. Therefore, the possibility of the trigger word spoken by the user during the call being heard by the other party is reduced. As a result, the reduction in security can also be suppressed. Furthermore, during a call, if the user abruptly says a trigger word, the other party will also feel a sense of disharmony, but in the information terminal 10, since there is no need for a trigger word when in a call with other terminals, the generation of such a sense of disharmony can also be suppressed. Furthermore, in the information terminal 10 of this embodiment, since the second method, which is simpler than the first method in voice recognition, is realized by varying the number of control commands registered in the dictionary, the processing speed related to voice recognition during a call can be improved with a simpler structure. (5) Control Commands and Operational Status: As can be understood from the aforementioned Operational Examples 1 to 6 and Table 1, in this embodiment, the type of control command recognized by the voice recognition unit 182 is set according to the operational status of the local device (information terminal 10). Therefore, in each operational status of the local device (information terminal 10), when the voice recognition unit 182 recognizes which control command is included in the voice input to the microphone 131, the possibility of searching for all control commands as reference objects can be reduced. Consequently, the processing speed associated with voice recognition can be improved. Furthermore, if all control commands are used as reference objects for retrieval in any operating state, the recognition rate associated with voice recognition may decrease. For example, even if the user speaks the correct command word, the probability of the voice recognition unit 182 failing to recognize the voice may increase. However, in the information terminal 10 of this embodiment, this reduction in recognition rate can be suppressed. Thus, the processing speed or accuracy of voice recognition can be improved according to the information terminal 10. As a result, the information terminal 10 has the advantage of achieving an improvement in the voice recognition function. Specifically, when the action state is a call state for receiving a call from another terminal, the type of control instruction for performing voice recognition includes a response instruction for answering the call. However, when the action state is a standby state, the type of control instruction for performing voice recognition does not include a response instruction. Therefore, in the standby state, when the voice recognition unit 182 performs voice recognition on which control instruction is included in the sound input to the microphone 131, the response instruction for the call is not set as a search object. As a result, the processing speed or accuracy of voice recognition can be improved. In this embodiment, the first dictionary D11 and the second dictionary D12 used are switched according to the action state, and in the standby state, the response instruction is not used as a search object. Furthermore, when the action state is a call state in which a call is received from another terminal, the type of control instruction for which voice recognition is performed includes an unlocking instruction for unlocking the electric lock 201. However, when the action state is a standby state, the type of control instruction for which voice recognition is performed does not include an unlocking instruction. Therefore, in the standby state, when the voice recognition unit 182 performs voice recognition on which control instruction is included in the sound input to the microphone 131, the unlocking instruction of the electric lock 201 is not set as a search object. As a result, the processing speed or accuracy of voice recognition can be improved. In this embodiment, the first dictionary D11 and the second dictionary D12 used are switched according to the action state, and in the standby state, the unlocking instruction is not set as a search object. Furthermore, when the action state is a call state in which a call is received from another terminal, the type of control instruction for performing voice recognition includes a cancel instruction for canceling the call. When the action state is a standby state, the type of control instruction for performing voice recognition does not include a cancel instruction. Therefore, in the standby state, when the voice recognition unit 182 performs voice recognition on which control instruction the sound input to the microphone 131 includes, the cancel instruction for calling is not set as a search object. As a result, the processing speed or accuracy of voice recognition can be improved. The "cancel instruction" for calling mentioned here can be equivalent to, for example, an instruction to end a call or an unlock instruction for unlocking the electric lock 201. Alternatively, it can be a special instruction for canceling a call (such as "stop calling"). In this embodiment, the first dictionary D11 and the second dictionary D12 used are switched according to the action state, and in the standby state, the cancel instruction for calling is not a search object. Furthermore, when the action state is a call state with another terminal, the type of control command for which voice recognition is performed includes an unlocking command for unlocking the electric lock 201. However, when the action state is a standby state, the type of control command for which voice recognition is performed does not include an unlocking command. Therefore, in the standby state, when the voice recognition unit 182 performs voice recognition on which control command is included in the sound input to the microphone 131, the unlocking command of the electric lock 201 is not set as a search object. As a result, the processing speed or accuracy of voice recognition can be improved. In this embodiment, the first dictionary D11 and the second dictionary D12 used are switched according to the action state, and in the standby state, the unlocking command is not set as a search object. Furthermore, when the action state is a call state with another terminal, the types of control instructions for performing voice recognition include an end instruction for ending the call. When the action state is a standby state, the types of control instructions for performing voice recognition do not include an end instruction. Therefore, in the standby state, when the voice recognition unit 182 performs voice recognition on which control instruction is included in the sound input to the microphone 131, the end instruction of the call is not set as a search object. As a result, the processing speed or accuracy of the voice recognition can be improved. In this embodiment, the first dictionary D11 and the second dictionary D12 used are switched according to the action state, and in the standby state, the end instruction of the call is not set as a search object. Furthermore, when the action state is a state of executing a prescribed action mode, the types of control instructions for performing sound recognition do not include a start instruction for starting the prescribed action mode, but include a release instruction for releasing the prescribed action mode in execution. As described above, the prescribed action mode means the action mode of the crime prevention setting, the action mode of the door monitor confirmation, and the action mode of the video playback, etc. For example, in Table 1, these start instructions are "alert setting", "let me see the door monitor", and "play video", etc. Therefore, for the mode action state of executing the prescribed action mode, when the sound recognition unit 182 performs sound recognition on which control instruction is included in the sound input to the microphone 131, the start instruction of the prescribed action mode is not set as the search object. For example, in the alert state of the action in which the crime prevention setting has been executed, when the sound recognition is performed on which control instruction is included in the input sound, the start instruction of the crime prevention setting (alert setting) is not set as the search object. As a result, the processing speed or accuracy of the sound recognition can be improved. In this embodiment, in the first dictionary D11, when a state of executing a predetermined operation mode is present, the start command is not a search target. Furthermore, when the action state is the standby state, the type of control instruction for performing sound recognition does not include a release instruction for releasing the action mode specified above, but includes a start instruction for starting the action mode specified above. As described above, the specified action mode means the action mode of crime prevention setting, the action mode of door monitor confirmation, and the action mode of video playback, etc. In Table 1, such release instructions are "Release alarm setting", "End", and "End", etc. Therefore, in the standby state, when the sound recognition unit 182 performs sound recognition on which control instruction is included in the sound input to the microphone 131, the release instruction of the specified action mode is not set as the search object. As a result, the processing speed or accuracy of sound recognition can be improved. In this embodiment, when the first dictionary D11 is in the standby state, the release instruction for releasing the specified action mode is not used as the search object. (6) Variations (6-1) Variation 1 The following describes an information terminal 10 and an intercom system 1 according to this variation (Variation 1) with reference to FIG10. Regarding the information terminal 10 and intercom system 1 according to Variation 1, components that are substantially common to those of the information terminal 10 and intercom system 1 according to the aforementioned embodiment are sometimes given the same reference numerals, and detailed description thereof is omitted. The intercom system 1 of Modification 1 differs from the intercom system 1 of the above-described embodiment in that it further includes a voice recognition system A1. Voice recognition system A1 comprises, for example, a microcomputer having a processor and memory. The processor executes a program stored in the memory, allowing the microcomputer to function as voice recognition system A1. The program executed by the processor is pre-recorded in the microcomputer's memory, but it can also be stored and provided on a non-transitory storage medium such as a memory card, or provided via an electrical communication line such as the internet. In variation 1, as shown in FIG10 , the functions of the voice recognition system A1 are installed in an external server 70. The server 70 may be composed of one or more server devices, and such server devices may constitute a cloud system. In FIG. 10 , for convenience, only the information terminal 10 installed in a household E2 in the intercom system 1 and the server 70 to which the information terminal 10 is communicatively connected via the network NT1 are shown. As shown in FIG10 , the information terminal 10 of Modification 1 includes a first communication unit 11, a second communication unit 12, a sound acquisition unit 13, an operation unit 14, a sound output unit 15, a display unit 16, a memory unit 17, a processing unit 18, and a third communication unit 19. The processing unit 18 includes a sound processing unit 181, a sound recognition unit 182, a control processing unit 183, a display processing unit 184, and a call processing unit 185. The sound recognition unit 182 performs sound recognition based on the sound input to the microphone 131. The first communication unit 11 performs communications, including calls with other terminals (here, the lobby intercom 20). The second communication unit 12 communicates with the voice recognition system A1. The voice recognition system A1 communicates with the voice recognition system A1, which recognizes the command voices related to the control performed by the control processing unit 183. The third communication unit 19 communicates, including calls with other terminals (here, the entrance sub-unit 40). The information terminal 10 of variation 1 has a first mode and a second mode. In the first mode, the voice recognition unit 182 performs trigger voice recognition on the voice input to the microphone 131 to determine whether the voice contains a trigger word. In the first mode, if the voice contains a trigger word, communication is performed with the voice recognition system A1 for command voice recognition. In the second mode, the voice recognition unit 182 does not perform trigger voice recognition, but communicates with the voice recognition system A1 for command voice recognition. The information terminal 10 operates in the first mode in the standby state and in the second mode when in a call state with another terminal. As shown in Figure 10, the voice recognition system A1 includes a communication unit A11, a voice recognition unit A12, and a memory unit A13. The communication unit A11 has a communication interface for individually communicating with each of a plurality of information terminals 10 (the second communication unit 12) installed in one or more facilities (such as the residential complex 5). When the communication unit A11 receives voice data that may include a control command (command word) from the information terminal 10, the voice recognition unit A12 performs command voice recognition processing. The voice recognition system A1 then sends the voice recognition results from the voice recognition unit A12 back to the information terminal 10, the source of the voice data, from the communication unit A11. The memory unit A13 replaces the memory unit 17 of the information terminal 10 in the above embodiment and stores the command dictionary D1 (first dictionary D11 and second dictionary D12). In addition, the memory unit 17 of the information terminal 10 stores the trigger dictionary D0 as in the above embodiment. In summary, the voice recognition unit 182 of the information terminal 10 of Variation 1 only has the trigger voice recognition function, which is one of the trigger voice recognition and command voice recognition functions of the information terminal 10 of the above-mentioned embodiment. Furthermore, the command voice recognition function of the information terminal 10 of the above-mentioned embodiment is implemented in the external system (voice recognition system A1) of the information terminal 10. The information terminal 10 of the first variation performs trigger voice recognition locally, causing the voice recognition system A1 to perform command voice recognition. This can reduce the processing load of the information terminal 10. Furthermore, similar to the information terminal 10 of the aforementioned embodiment, the information terminal 10 of Variation 1 does not trigger voice recognition during a call. This increases the likelihood of increased processing speed related to voice recognition, thereby improving user convenience. Furthermore, this can prevent a reduction in security. Consequently, the information terminal 10 of Variation 1 also has the advantage of achieving improvements in voice recognition functionality. Furthermore, in Variation 1, the likelihood that voice recognition system A1 will almost always monitor the voice input to information terminal 10 to see if it contains a command word increases. This can result in an increase in the amount of communication related to voice data between information terminal 10 and voice recognition system A1. Taking this into consideration, in Variation 1, it is preferable to somewhat reduce the timing for performing command voice recognition and the specific voices that are the subject of command voice recognition. Specifically, information terminal 10 is preferably configured to perform command voice recognition in a specific state (e.g., standby mode). The same functions as those of the information terminal 10 of variation 1 can also be embodied by the control method. The control method includes a voice recognition step, a control processing step, a first communication step, and a second communication step. In the voice recognition step, voice recognition processing is performed based on the voice input to the microphone 131. In the first communication step, communication including calls with other terminals is performed. In the second communication step, communication is performed with a voice recognition system that performs command voice recognition on control commands related to the control performed in the control processing step. The information terminal 10 has a first mode and a second mode. In the first mode, trigger voice recognition is performed on whether the voice input to the microphone 131 contains a trigger word in the voice recognition step. In the first mode, when the trigger word is included, communication is performed with the voice recognition system A1 in the second communication step in order to perform command voice recognition. In the second mode, trigger voice recognition is not performed in the voice recognition step, and communication is performed with the voice recognition system A1 in the second communication step in order to perform command voice recognition. In the control method, the information terminal 10 is controlled in a manner such that it operates in the first mode in the standby state and operates in the second mode in the call state with other terminals. The above control method also has the advantage of seeking improvements related to the voice recognition function. The control method is used on a computer system (information terminal 10). That is, the control method can also be embodied by a program. The program of variation 1 is a program for causing one or more processors to execute the above control method. The program can be recorded on a non-temporary recording medium that can be read by a computer. (6-2) Variation 2 The following describes the information terminal 10 and intercom system 1 of this variation (Variation 2) with reference to FIG11. Regarding the information terminal 10 and intercom system 1 of Variation 2, components that are substantially common to those of the information terminal 10 and intercom system 1 of the aforementioned embodiment and Variation 1 are sometimes denoted by the same reference numerals, and detailed description thereof is omitted. Variation 2 is another variation of Variation 1. The intercom system 1 of Variation 2, like Variation 1, further includes a voice recognition system A1. However, the voice recognition system A1 of Variation 2 differs from the voice recognition system A1 of Variation 1 in that it not only recognizes command voices but also trigger voices. In other words, the information terminal 10 of Variation 2 differs from the information terminal 10 of Variation 1 in that it lacks any voice recognition functionality. In FIG. 11 , for convenience, only the information terminal 10 installed in a household E2 in the intercom system 1 and the server 70 to which the information terminal 10 is communicatively connected via the network NT1 are shown. The voice recognition system A1 of the second modification includes a communication unit A11 for communicating with the information terminal 10 , a voice recognition unit A12 , and a storage unit A13 . When the communication unit A11 receives sound input into the microphone 131 from the information terminal 10, the sound recognition unit A12 performs sound recognition on the sound. When the communication unit A11 receives sound data that may include trigger words and / or control instructions (command words) from the information terminal 10, the sound recognition unit A12 can perform trigger sound recognition and / or command sound recognition processing. In other words, the sound recognition unit A12 performs command sound recognition on control instructions related to the control performed by the control processing unit 183 of the information terminal 10. The sound recognition system A1 returns the sound recognition results of the sound recognition unit A12 from the communication unit A11 to the information terminal 10, which is the source of the sound data. The memory unit A13 stores the trigger dictionary D0 and the command dictionary D1. Here, the voice recognition unit A12 of variation 2 has a first mode and a second mode. In the first mode, trigger voice recognition is performed to determine whether the voice input to the microphone 131 contains a trigger word. In the first mode, when the trigger word is contained, command voice recognition is performed for the control command related to the control performed by the control processing unit 183 of the information terminal 10. In the second mode, trigger voice recognition is performed without performing trigger voice recognition. The voice recognition system A1 operates in the first mode when the information terminal 10 is in the standby state, and operates in the second mode when the information terminal 10 is in the call state with other terminals (the lobby intercom 20, the entrance sub-unit 40). That is, the voice recognition system A1 not only receives voice data from the information terminal 10, but also receives information related to the operating state of the information terminal 10 at the time of voice input (current). For example, when the information terminal 10 performs voice input in the call state, the user's voice data and information indicating that the terminal is in the call state are sent to the voice recognition system A1. The voice recognition system A1 determines whether to operate in the first mode or the second mode based on the received operating state of the information terminal 10. In addition, the type of control command recognized by the voice recognition unit A12 is set according to the operating state of the information terminal 10. In the voice recognition unit A12 of the second variation, the portion (circuit or server device) that performs the processing of trigger voice recognition and the portion (circuit or server device) that performs the processing of command voice recognition can also be separated. 11, the information terminal 10 of Modification 2 differs from the information terminal 10 of the above-mentioned embodiment and Modification 1 in that it does not include the voice recognition unit 182. Furthermore, the storage unit 17 of the information terminal 10 does not store the trigger dictionary D0 and the command dictionary D1. By performing all the processing of trigger voice recognition and command voice recognition on the voice recognition system A1 (eg, cloud) as in variation 2, the processing load of the information terminal 10 can be further reduced. Furthermore, similar to the information terminal 10 of the aforementioned embodiment, the voice recognition system A1 of Variation 2 does not trigger voice recognition during a call. This increases the likelihood of increased voice recognition processing speed, improving user convenience. Furthermore, a reduction in security can be minimized. Consequently, the voice recognition system A1 of Variation 2 also offers the advantage of improved voice recognition functionality. Furthermore, in the voice recognition system A1 of variation 2, the type of control command recognized by the voice recognition unit A12 is set according to the operating state of the information terminal 10. Therefore, in each operating state, when the voice recognition unit A12 identifies which control command is contained in the voice input to the microphone 131, it is less likely to search for all control commands as reference. As a result, the processing speed and accuracy of voice recognition can be improved. Furthermore, in the second variation, the processing load of the information terminal 10 can be reduced compared to the case where the voice recognition function is provided in the information terminal 10. As a result, there is an advantage in that the voice recognition function can be improved in the voice recognition system A1. In Variation 2, the likelihood that voice recognition system A1 will almost always monitor the voice input to the information terminal 10 for trigger words or command words is increased. Consequently, Variation 2 may further increase the amount of communication related to voice data compared to Variation 1. Taking this into account, in Variation 2, it is preferable to somewhat narrow the timing for trigger voice recognition and command voice recognition, as well as the voices that serve as voice recognition targets. In addition, the same function as that of the voice recognition system A1 of variation 2 can also be embodied by a control method. One aspect of the control method for controlling the voice recognition system A1 includes a communication step for communicating with the information terminal 10 and a voice recognition step. In the voice recognition step, when the voice input to the microphone 131 is received from the information terminal 10 in the communication step, voice recognition processing of the voice is performed. The voice recognition system A1 has a first mode and a second mode. In the first mode, in the voice recognition step, trigger voice recognition is performed to determine whether the voice input to the microphone 131 contains a trigger word. In the first mode, when the trigger word is contained, command voice recognition is performed for the control command related to the control performed by the control processing unit 183 of the information terminal 10. In the second mode, in the voice recognition step, trigger voice recognition is performed instead of trigger voice recognition. In the control method, the information terminal 10 operates in the first mode when in the standby state, and operates in the second mode when the information terminal 10 is in the call state with other terminals (the lobby intercom 20, the entrance sub-machine 40). The control method of the above-mentioned aspect also has the advantage of being able to seek improvements related to the voice recognition function. The control method of this aspect can be used on a computer system (voice recognition system A1). That is, the control method of this aspect can also be embodied by a program. The program of variation 2 is a program for causing one or more processors to execute the control method of the above-mentioned aspect. The program can be recorded on a non-temporary recording medium that can be read by a computer. In addition, another aspect of the control method for controlling the sound recognition system A1 includes a communication step for communicating with the information terminal 10 and a sound recognition step. In the sound recognition step, when the sound input to the microphone 131 is received from the information terminal 10 in the communication step, sound recognition processing is performed on the sound. In the sound recognition step, the control instructions related to the control performed by the control processing unit 183 of the information terminal 10 are subjected to command sound recognition. The type of control instructions for sound recognition in the sound recognition step is set according to the operating state of the information terminal 10. The control method in the above-mentioned other aspect also has the advantage of being able to seek improvements related to the function of sound recognition. The control method in this other aspect can be used on a computer system (sound recognition system A1). That is, the control method in this other aspect can also be embodied by a program. The program of variation 2 is a program for causing one or more processors to execute the control method in this other aspect. The program can be recorded on a non-temporary recording medium that can be read by a computer. (6-3) Other variations The information terminal 10, intercom system 1 and voice recognition system A1 disclosed herein include a computer system. The computer system is mainly composed of a processor and a memory as hardware. The functions of the information terminal 10, intercom system 1 and voice recognition system A1 disclosed herein are realized by the processor executing the program recorded in the memory of the computer system. The program can be pre-recorded in the memory of the computer system, provided through an electrical communication line, or recorded in a non-temporary recording medium such as a memory card, optical disc, hard disk drive, etc. that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits referred to here, such as ICs and LSIs, are referred to differently depending on their level of integration, including system LSIs, VLSI (Very Large Scale Integration), and ULSI (Ultra Large Scale Integration). Furthermore, FPGAs (Field-Programmable Gate Arrays), which are programmed after LSI fabrication, or logic devices that can reconfigure the internal interconnections or circuit partitioning within an LSI, can also be used as processors. Multiple electronic circuits can be integrated into a single chip or distributed across multiple chips. Multiple chips can be integrated into a single device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, a microcontroller is also composed of one or more electronic circuits, including semiconductor integrated circuits or large-scale integrated circuits. Furthermore, it is not essential that the multiple functions of the information terminal 10, intercom system 1, and voice recognition system A1 are integrated into a single housing. The components of the information terminal 10, intercom system 1, and voice recognition system A1 may be dispersed across multiple housings. Conversely, multiple functions of the information terminal 10, intercom system 1, and voice recognition system A1 may be integrated into a single housing. Furthermore, at least a portion of the functions of each of the information terminal 10, intercom system 1, and voice recognition system A1, for example, a portion of the functions of the information terminal 10, may be implemented via the cloud (cloud computing). In the above embodiment, as an example, it is assumed that the information terminal 10 is a resident terminal (intercom master), and voice recognition is performed based on the sound directly input into the microphone 131 of the terminal. However, the microphone for acquiring sound for voice recognition can also be external to the information terminal 10. Furthermore, the microphone for acquiring sound for voice recognition can also be installed in a device different from the information terminal 10 (for example, an intercom slave located in the same resident E2, or a portable terminal such as a smartphone, tablet terminal, or wearable terminal that the user can carry). The information terminal 10 can also communicate with this other device and acquire the user's voice. For example, as an example of a portable terminal, the information terminal 10 or voice recognition system A1 can also perform voice recognition based on sound input into the microphone of a smartphone carried by the user. In this case, a dedicated application for communicating with the information terminal 10 is pre-installed on the smartphone. If the user lives in household E2, it is preferable that the user use the smartphone to answer calls to the information terminal 10 or speak with visitors even when not near the information terminal 10. The smartphone transmits the sound (data) input into the microphone to the information terminal 10 via wireless communication based on standards such as Wi-Fi (registered trademark). In other words, when the user lives in household E2 and the smartphone is within a certain range of the information terminal 10, the user can use the smartphone to indirectly answer calls to the information terminal 10 or speak with the smartphone through voice operation. Furthermore, at least a portion of the voice recognition function of the information terminal 10 can also be installed as an application on the smartphone. For example, the trigger voice recognition function may be located in a smart phone, and the command voice recognition function may be located in the information terminal 10 or the voice recognition system A1. In one variation, during a call from or a conversation with the entrance handset 40, if the unlock button 143 is pressed or a command (e.g., "unlock") is successfully recognized, the information terminal 10 can send an unlock signal to unlock the electric lock of the entrance door of the facility (resident E2). The information terminal 10 can also unlock the electric lock of the entrance door via the entrance handset 40 or other device. In a variation, when the intercom system 1 is used in a residential building, when a call is received from the residential entrance handset or when a conversation is held with the residential entrance handset, the information terminal 10 can also send an unlock signal to unlock the electric lock of the residential entrance door when the unlock button 143 is pressed or when a command word (e.g., "unlock") is successfully recognized. The information terminal 10 can also unlock the electric lock of the residential entrance door via the residential entrance handset or other device. The above-mentioned embodiment, modification 1, modification 2 and other modifications may be applied in combination as appropriate. (7) Summary As described above, the information terminal (10) of the first embodiment includes a voice recognition unit (182), a control processing unit (183), and a communication unit (a first communication unit 11 and a third communication unit 19). The voice recognition unit (182) performs voice recognition based on the voice input to the microphone (131). The control processing unit (183) performs control based on the control instructions (e.g., control instructions for successful voice recognition) recognized by the voice recognition unit (182). The communication unit (the first communication unit 11 and the third communication unit 19) performs communication including calls with other terminals (the lobby intercom 20 and the entrance sub-unit 40). In the information terminal (10), the type of control instructions recognized by the voice recognition unit (182) is set according to the operating state of the terminal. According to the above-mentioned aspect, the type of control instruction recognized by the sound recognition unit (182) is set according to the operating state of the information terminal (10). Therefore, in each operating state, when the sound recognition unit (182) recognizes which control instruction is included in the sound input to the microphone (131), the possibility of using all control instructions as reference objects for retrieval can be reduced. As a result, the processing speed or accuracy of the sound recognition can be improved. As a result, there is an advantage in seeking improvement in the function related to sound recognition in the information terminal (10). Regarding the information terminal (10) of the second embodiment, as in the first embodiment, the type of control instruction for performing sound recognition when the action state is a state of executing a prescribed action mode does not include a start instruction for starting the prescribed action mode, but includes a release instruction for releasing the prescribed action mode in execution. According to the above aspect, when the sound recognition unit (182) performs sound recognition on which control command is included in the sound input to the microphone (131) in the state of executing the prescribed action mode, the start command of the prescribed action mode is not set as the search target. Therefore, the processing speed or accuracy of the sound recognition can be improved. Regarding the information terminal (10) of the third aspect, as in the second aspect, the type of control instruction for performing voice recognition when the operation state is the standby state does not include a release instruction, but includes a start instruction. According to the above aspect, in the standby state, when the voice recognition unit (182) recognizes which control command is included in the voice input to the microphone (131), the command to release the specified action mode is not set as a search target. Therefore, the processing speed or accuracy of the voice recognition can be improved. Regarding the information terminal (10) of the fourth aspect, as in any one of the first to third aspects, the type of control command for performing voice recognition when the operating state is a call state for receiving a call from another terminal includes a response command for answering the call. The type of control command for performing voice recognition when the operating state is a standby state does not include a response command. According to the above aspect, in the standby state, when the voice recognition unit (182) recognizes which control command is included in the voice input to the microphone (131), the answer command for the call is not set as the search object. Therefore, the processing speed or accuracy of the voice recognition can be improved. Regarding the information terminal (10) of the fifth aspect, as in any one of the first to fourth aspects, the type of control command for performing voice recognition when the operating state is a call state for receiving a call from another terminal includes an unlocking command for unlocking an electric lock (201) provided on a door (entrance door 200) for entering and exiting a facility (collective housing 5) where the information terminal (10) is installed. The type of control command for performing voice recognition when the operating state is a standby state does not include an unlocking command. According to the above aspect, in the standby state, when the sound recognition unit (182) recognizes which control command is included in the sound input to the microphone (131), the unlocking command of the electric lock (201) is not set as the search object. Therefore, the processing speed or accuracy of the sound recognition can be improved. Regarding the information terminal (10) of the sixth aspect, as in any one of the first to fifth aspects, the type of control command for performing voice recognition when the operating state is a call state for receiving a call from another terminal includes a cancel command for canceling the call. The type of control command for performing voice recognition when the operating state is a standby state does not include a cancel command. According to the above aspect, in the standby state, when the voice recognition unit (182) recognizes which control command is included in the voice input to the microphone (131), the call cancel command is not set as a search object. Therefore, the processing speed or accuracy of the voice recognition can be improved. Regarding the information terminal (10) of the seventh aspect, as in any one of the first to sixth aspects, the type of control command for performing voice recognition when the operating state is a call state with another terminal includes an unlocking command for unlocking an electric lock (201) provided on a door (entrance door 200) for entering and exiting a facility (collective housing 5) where the information terminal (10) is installed. The type of control command for performing voice recognition when the operating state is a standby state does not include an unlocking command. According to the above aspect, in the standby state, when the sound recognition unit (182) recognizes which control command is included in the sound input to the microphone (131), the unlocking command of the electric lock (201) is not set as the search object. Therefore, the processing speed or accuracy of the sound recognition can be improved. Regarding the information terminal (10) of the eighth aspect, as in any one of the first to seventh aspects, the type of control command for performing voice recognition when the operation state is a call state with another terminal includes an end command for ending the call. The type of control command for performing voice recognition when the operation state is a standby state does not include an end command. According to the above aspect, in the standby state, when the voice recognition unit (182) recognizes which control command is included in the voice input to the microphone (131), the call end command is not set as the search object. Therefore, the processing speed or accuracy of the voice recognition can be improved. Regarding the information terminal (10) of the ninth aspect, as in any one of the first to eighth aspects, the control command recognized by the voice recognition unit (182) includes a command word set by the same word between a plurality of operating states. Even if the control command recognized by the voice recognition unit (182) (for example, a control command for which voice recognition is successful) is the same word, the control processing unit (183) performs different control according to the operating state of the device. According to the above aspect, the number of control command words that the user needs to remember can be reduced, thereby improving user convenience. The intercom system (1) of the tenth aspect comprises the information terminal (10) of any one of the first to ninth aspects and other terminals (the lobby intercom 20 and the entrance sub-unit 40). According to the above aspects, an intercom system (1) can be provided that can seek improvements related to the voice recognition function. The voice recognition system (A1) of the eleventh embodiment includes a communication unit (A11) for communicating with an information terminal (10) and a voice recognition unit (A12). When the communication unit (A11) receives a voice input to a microphone (131) from the information terminal (10), the voice recognition unit (A12) performs voice recognition of the voice. The voice recognition unit (A12) performs voice recognition of a control command related to the control performed by the control processing unit (183) of the information terminal (10). The type of the control command recognized by the voice recognition unit (A12) is set according to the operating state of the information terminal (10). According to the above-mentioned aspect, the type of control instruction recognized by the sound recognition unit (A12) is set according to the operating state of the information terminal (10). Therefore, in each operating state, when the sound recognition unit (A12) recognizes which control instruction is included in the sound input to the microphone (131), the possibility of setting all control instructions as objects for retrieval can be reduced. As a result, the processing speed or accuracy of sound recognition can be improved. Furthermore, compared with the case where the sound recognition function is set on the information terminal (10), the processing load of the information terminal (10) can be suppressed. As a result, there is an advantage in that improvements related to the sound recognition function can be sought in the sound recognition system (A1). The control method of the 12th aspect is a control method for controlling an information terminal (10). The control method includes a voice recognition step, a control processing step, and a communication step. In the voice recognition step, voice recognition processing is performed based on the voice input to the microphone (131). In the control processing step, control is performed based on the control instruction (for example, the control instruction of successful voice recognition) recognized in the voice recognition step. In the communication step, communication including a call with other terminals (the lobby intercom 20, the entrance sub-machine 40) is performed. The type of control instruction recognized in the voice recognition step is set according to the operation state of the information terminal 10. According to the above aspects, a control method for improving the function of voice recognition can be provided. The control method of the 13th aspect is a control method for controlling a sound recognition system (A1). The control method includes a communication step for communicating with an information terminal (10) and a sound recognition step. In the sound recognition step, when a sound input to a microphone (131) is received from the information terminal (10) in the communication step, sound recognition processing of the sound is performed. In the sound recognition step, a control instruction related to the control performed by the control processing unit (183) of the information terminal (10) is subjected to command sound recognition. The type of control instruction recognized in the sound recognition step is set according to the operation state of the information terminal (10). According to the above aspects, a control method for improving the function of voice recognition can be provided. The program of the fourteenth aspect is a program for causing one or more processors to execute the control method of any one of the twelfth or thirteenth aspects. According to the above aspects, it is possible to provide a function for improving the function of voice recognition. The structures of the second to ninth aspects are not necessary for the information terminal (10) of the first aspect and can be omitted as appropriate. 1: Intercom System 5: Residential Complex (Facility) 10: Information Terminal 11: First Communication Unit (Communication Unit) 12: Second Communication Unit 13: Sound Acquisition Unit 14: Operation Unit 15: Sound Output Unit 16: Display Unit 17: Memory Unit 18: Processing Unit 19: Third Communication Unit (Communication Unit) 20: Lobby Intercom (Other Terminal) 21: Communication Unit 22: Control Unit 23: Call Unit 24: Display Unit 25: Operation Unit 26: Memory Unit 27: Camera Unit 30: Control Device 31: Communication Unit 32: Control Unit 33: Memory Unit 40: Entrance Door Handset (Other Terminal) 50: Brancher 61: First Trunk Line 62: Second Trunk Line 63: Branch Line 64: Connection Line 70: Server 131: Microphone 141: Answering Operation Unit 142: Ending Operation Unit 143: Unlocking Operation Unit 151: Speaker 171: First Memory Unit 172: Second Memory Unit 181: Voice Processing Unit 182: Voice Recognition Unit 183: Control Processing Unit 184: Display Processing Unit 185: Call Processing Unit 200: Hall Door 201: Electric Lock 1311: First Microphone 1312: Second Microphone 1821: First Voice Recognition Unit 1822: Second Voice Recognition Unit A1: Voice Recognition System A11: Communication Unit A12: Voice Recognition Unit A13: Memory Unit D0: Trigger Dictionary D1: Command Dictionary D11: First Dictionary D12: Second Dictionary E1: Shared Hall (Front Hall) E2: Resident E3: Management Office NT1: Network ST1~ST4: Steps FIG1A is a block diagram illustrating the configuration of an information terminal according to one embodiment. FIG1B is a block diagram illustrating the configuration of the operating unit of the same information terminal. FIG2 is a block diagram illustrating the configuration of an intercom system equipped with the same information terminal. FIG3 is a flow chart of an action example (action example 1) associated with a call in the same information terminal. FIG4 is a conceptual diagram illustrating the action example (action example 1) in the same information terminal. FIG5A is a conceptual diagram illustrating an action example (action example 2) associated with a prescribed action (crime prevention setting action) in the same information terminal. FIG5B is a conceptual diagram illustrating the action example 2 in the same information terminal. FIG6 is a conceptual diagram illustrating an action example (action example 3) associated with a prescribed action (door monitor confirmation action) in the same information terminal. FIG7 is a conceptual diagram illustrating an action example (action example 4) associated with a prescribed action (video playback action) in the same information terminal. FIG8 is a conceptual diagram illustrating an example operation (Example 5) related to a predetermined operation (air conditioning control operation) in the information terminal described above. FIG9 is a conceptual diagram illustrating an example operation (Example 6) related to a predetermined operation (scene control operation) in the information terminal described above. FIG10 is a block diagram illustrating the configuration of Variation 1 of an intercom system including the information terminal described above. FIG11 is a block diagram illustrating the configuration of Variation 2 of an intercom system including the information terminal described above. 10: Information Terminal 11: 1st Communications Department 12:Second Communications Department 13: Acquisition section 14: Operation Department 15: Sound output unit 16: Display unit 17: Memory Department 18: Processing Department 19:3rd Communications Department 131: Microphone 151: Speaker 171: Memory Section 1 172: Memory Section 2 181: Sound Processing Unit 182: Voice Recognition Unit 183: Control Processing Unit 184: Display processing unit 185: Call Processing Department 1311: Microphone 1 1312: Second Microphone 1821:1st voice recognition unit 1822: Second Voice Recognition Unit D0: Trigger dictionary D1: Command Dictionary D11: No. 1 Dictionary D12: Second Dictionary

Claims

1. An information terminal comprising: a voice recognition unit that performs voice recognition based on sound input to a microphone; a control processing unit that performs control based on control commands recognized by the voice recognition unit; and a communication unit that performs communication including calls with other terminals; wherein the operating state of the information terminal includes at least a call state receiving a call from the other terminals, a call state communicating with the other terminals, a mode operation state executing a predetermined operation mode, and a standby state; wherein the predetermined operation mode refers to at least one of the following actions: actions related to crime prevention functions; actions related to confirming real-time images captured by a camera unit external to the information terminal; actions related to playing video and audio recording messages of images acquired by the other terminals; and actions related to controlling electrical machinery controllable by a controller of HEMS; wherein the type of control command recognized by the voice recognition unit is set according to each of the call state, the call state, the mode operation state, and the standby state of the information terminal.

2. For the information terminal of request item 1, the types of control commands for voice recognition when the above-mentioned action state is the above-mentioned mode action state do not include start commands for starting the above-mentioned specified action mode, but include release commands for releasing the above-mentioned specified action mode that is being executed.

3. For the information terminal of request item 2, the type of control command for voice recognition when the above-mentioned action state is the above-mentioned standby state does not include the above-mentioned release command, but includes the above-mentioned start command.

4. For any of the information terminals in requests 1 to 3, the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned call state include a response command for answering the above-mentioned call; and the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned standby state do not include the above-mentioned response command.

5. For any of the information terminals in requests 1 to 3, the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned call state include an unlocking command for unlocking an electric lock installed on a door for entering and exiting a facility where the above-mentioned information terminal is installed; and the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned standby state do not include the above-mentioned unlocking command.

6. For any of the information terminals in requests 1 to 3, the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned call state include a cancellation command for canceling the above-mentioned call; and the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned standby state do not include the above-mentioned cancellation command.

7. For any of the information terminals in requests 1 to 3, the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned call state include an unlocking command for unlocking an electric lock installed on a door for entering and exiting a facility where the above-mentioned information terminal is installed; and the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned standby state do not include the above-mentioned unlocking command.

8. For any of the information terminals in requests 1 to 3, the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned call state include an end command for ending the above-mentioned call; and the types of control commands for voice recognition when the above-mentioned operation state is the above-mentioned standby state do not include the above-mentioned end command.

9. For any of the requests 1 to 3, the control command identified by the voice recognition unit includes a command word set with the same word across a plurality of operation states; and even if the control command identified by the voice recognition unit is the same word, the control processing unit performs different controls according to the operation state of the information terminal.

10. A walkie-talkie system comprising: an information terminal of any one of claims 1 to 9; and the other terminals mentioned above.

11. A voice recognition system comprising: a communication unit that communicates with an information terminal including communication with other terminals; and a voice recognition unit that, when the communication unit receives sound input to a microphone from the information terminal, performs voice recognition on the sound; and the voice recognition unit performs command voice recognition on control commands related to control performed by the control processing unit of the information terminal; wherein the operating state of the information terminal includes at least a call state receiving a call from the other terminal, a call state communicating with the other terminal, a mode operating state executing a predetermined operating mode, and a standby state; and the predetermined operating mode refers to at least one of the following actions: actions related to crime prevention functions; actions related to confirming real-time images captured by a camera unit external to the information terminal; The actions related to the playback of video recordings and audio recordings obtained from the other terminals mentioned above; the actions related to the control of electrical machines that can be controlled by the HEMS controller; and the types of control commands for voice recognition performed by the voice recognition unit are set according to the call state, the conversation state, the mode operation state, and the standby state of the information terminal.

12. A control method executed by one or more processors in an information terminal, comprising: a voice recognition step, which performs voice recognition processing based on voice input to a microphone; a control processing step, which performs control based on control commands identified by the voice recognition step; and a communication step, which performs communication including talking to other terminals; wherein the operation state of the information terminal includes at least a call state receiving a call from the other terminals, a talk state talking to the other terminals, a mode operation state executing a predetermined operation mode, and a standby state; wherein the operation of the predetermined operation mode refers to at least one of the following: an operation related to crime prevention functions; an operation related to confirming real-time images captured by a camera unit external to the information terminal; The actions related to the playback of video recordings and audio recordings obtained from the other terminals mentioned above; and the actions related to the control of electrical machines that can be controlled by the HEMS controller; and the types of control commands for voice recognition in the voice recognition steps are set according to the call state, the conversation state, the mode operation state, and the standby state of the information terminal.

13. A control method executed by one or more processors in a voice recognition system, controlling the voice recognition system, comprising: a communication step, communicating with an information terminal that conducts communication including calls with other terminals; and a voice recognition step, in which, upon receiving sound input to a microphone from the information terminal in the communication step, the sound is processed for voice recognition; and in the voice recognition step, command voice recognition is performed on control commands related to control performed by the control processing unit of the information terminal; the operating state of the information terminal includes at least a call state receiving a call from the other terminal, a call state communicating with the other terminal, a mode operating state executing a predetermined operating mode, and a standby state; and the predetermined operating mode refers to at least one of the following actions: actions related to crime prevention functions; actions related to confirming real-time images captured by a camera unit external to the information terminal; The actions related to the playback of video recordings and audio recordings obtained from the other terminals mentioned above; and the actions related to the control of electrical machines that can be controlled by the HEMS controller; and the types of control commands for voice recognition in the voice recognition steps are set according to the call state, the conversation state, the mode operation state, and the standby state of the information terminal.

14. A control program for executing a control method of request item 12, and executing the control method by causing one or more processors in the information terminal to read the request item 12.

15. A control program for executing the control method of request item 13, and executing the control method by causing one or more processors in the voice recognition system to read the request.

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