Audio transmission device, audio transmission system, and server

Abstract

To provide an audio transmission device, an audio transmission system, and a server that can suitably provide audio acquired by an audio transmission device to a user.SOLUTION: An audio transmission device 20 includes audio acquiring means for acquiring a voice V, voice converting means for converting an audio V acquired by the audio acquiring means into audio data VD, and position acquiring means for acquiring playback position data when the audio V is reproduced. The audio transmission device 20 transmits the audio data VD and the playback position data to a server 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an audio transmitting device, an audio transmitting system, and a server. [Background technology]

[0002] There is known a technology for distributing audio data of audio broadcast from a loudspeaker to a user terminal. Patent Document 1 discloses an audio push distribution system that pushes audio information transmitted to users in a specific area, such as inside a car, an airplane, or a store, to user terminals located in the specific area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-191399 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, there are cases where a user wants to listen to a sound amplified by a loudspeaker device located at a predetermined position. [Means for solving the problem]

[0005] (1) The audio transmitting device is an audio transmitting device that transmits the audio of a portable loudspeaker that amplifies the speaker's voice to the surrounding area, and is equipped with an audio acquisition means for acquiring the audio during loudspeaker amplification, an audio conversion means for converting the audio acquired by the audio acquisition means into audio data, and a position acquisition means for acquiring loudspeaker position data indicating the position of the loudspeaker during loudspeaker amplification, and transmits the audio data and the loudspeaker position data to a server, and in the server, the audio data is associated with the loudspeaker position data and stored so that the audio data can be provided to an external user terminal in response to a request from the user terminal.

[0006] According to this configuration, since the loudspeaker position data is transmitted to the server together with the audio data, a user who wants to listen to the audio at the loudspeaker position can obtain the audio data related to the audio at the loudspeaker position via the server. Therefore, since the user can obtain the audio data via the server, the audio transmitting device can provide the audio to the user in an appropriate manner.

[0007] (2) The voice transmission system is a voice provision system that provides voice to a user, and includes the voice transmission device described in (1) above and the server, and the server extracts the voice data associated with the amplification position data corresponding to the location information based on a request sent from the user terminal, the request including location information indicating a specific location, and transmits the extracted voice data to the user terminal.

[0008] According to this configuration, the voice data is transmitted from the server to the user terminal, so that the user can hear the voice based on the voice data by amplifying the voice data at the user terminal. Therefore, since the user can obtain the voice data via the server, the voice transmission system can provide the voice to the user in an appropriate manner.

[0009] (3) A server provides voice data to a user terminal of a user based on a request from the user, and receives, via a network, voice data relating to the voice at the time of amplified voice from a portable loudspeaker that amplifies the speaker's voice to the surrounding area and loudspeaker position data indicating the position of the loudspeaker, stores the voice data so as to be linked to a specific position identified based on the loudspeaker position data, and transmits to the user terminal, based on position information included in the request from the user terminal, the voice data linked to the specific position corresponding to the position information.

[0010] According to this configuration, since the voice data is associated with a specific location and stored in the server, the voice data at the specific location can be transmitted to a user terminal in response to a request from the user. The user can hear the voice based on the voice data by amplifying the voice data at the user terminal. Therefore, since the user can amplify the voice data using the user terminal, the server can provide the voice to the user in an appropriate manner. Effect of the Invention

[0011] The voice transmitting device, the voice transmitting system, and the server can suitably provide the voice acquired by the voice transmitting device to the user. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic diagram of a voice transmission system according to a first embodiment. [Diagram 2] FIG. 2 is a block diagram showing a configuration of the voice transmission system of FIG. [Diagram 3] FIG. 2 is a side view of the voice transmitting device of FIG. [Figure 4] 2 is a block diagram showing an example of processing by the voice transmission system of FIG. 1. [Diagram 5] 2 is an example of voice data stored in the server of FIG. 1. [Figure 6] 2 is a diagram showing an example of audio data processing performed by the audio transmission system of FIG. 1; [Figure 7] 2 is a diagram showing an example of audio data processing performed by the audio transmission system of FIG. 1; [Figure 8] 2 is a sequence diagram of a first example of processing performed between the voice transmission system and the user terminal of FIG. 1. FIG. [Figure 9] 1. FIG. 4 is a sequence diagram of a second example of a process performed between the voice transmission system and the user terminal of FIG. [Figure 10] 1. FIG. 4 is a sequence diagram of a third example of processing performed between the voice transmission system and the user terminal of FIG. [Figure 11]FIG. 11 is a block diagram showing a configuration of a voice transmitting system according to a second embodiment. [Figure 12] FIG. 11 is a side view of a voice transmitting device and a loudspeaker according to a third embodiment. [Figure 13] FIG. 11 is a block diagram showing a configuration of a voice transmitting system according to a third embodiment. [Figure 14] FIG. 13 is a block diagram showing a configuration of a voice transmission system according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] First Embodiment A voice transmitting system 10, a voice transmitting device 20, and a server 30 according to an embodiment will be described with reference to FIGS.

[0014] <Audio transmission system> As shown in FIG. 1, a voice transmission system 10 transmits a voice V of a speaker S. The voice transmission system 10 provides the voice V to a user U. The voice transmission system 10 provides the voice V broadcast in a facility 1 to the user U. Examples of the facility 1 are indoor facilities such as shopping malls, office buildings, schools, research institutes, government buildings, factories, and stadiums, train and subway stations, bus stops, airports, and ports. The facility 1 may be an outdoor facility such as a park, a beach, or a campground. In the example of FIG. 1, the facility 1 is a bus stop. The user U to whom the voice V is provided may be located in the facility 1 or outside the facility 1.

[0015] The voice transmitting system 10 includes a voice transmitting device 20 and a server 30. The voice transmitting device 20 of this embodiment amplifies the voice V of a speaker S and transmits voice data VD generated from the voice V to the server 30. The server 30 transmits the voice data VD to a user terminal 80 of a user U based on a request from the user U. The voice transmitting system 10 includes a plurality of voice transmitting devices 20. The voice data VD is transmitted from the plurality of voice transmitting devices 20 to one server 30.

[0016] <Audio transmission device> 1 and 2, the voice transmitting device 20 of this embodiment is a loudspeaker device 20X that loudspeaks the voice V of a speaker S. The voice transmitting device 20 of this embodiment is a portable loudspeaker device 20X. The voice transmitting device 20 includes a microphone unit 21 and an amplifier unit 22. The voice transmitting device 20 includes a speaker unit 23. The voice transmitting device 20 amplifies the voice V acquired by the microphone unit 21 in the amplifier unit 22 and then outputs the voice V from the speaker unit 23, thereby loudspeaking the voice V around the voice transmitting device 20.

[0017] 1 and 3, the voice transmitting device 20 of this embodiment is a portable transistor megaphone. The voice transmitting device 20 includes a housing case 24. The housing case 24 is made of, for example, resin. The microphone unit 21, the amplifier unit 22, and the speaker unit 23 are housed in the housing case 24.

[0018] The voice transmitting device 20 includes a grip part 24A. The grip part 24A can be held by a speaker S who uses the voice transmitting device 20. The voice transmitting device 20 includes a horn part 24B. The horn part 24B has an opening so as to improve the directivity of the voice V output from the speaker part 23. The grip part 24A and the horn part 24B are formed in the housing case 24. The public address device 20X of this embodiment is a megaphone. The megaphone includes a grip part 24A that can be held by the speaker S.

[0019] As shown in Figs. 1 to 3, the audio transmitting device 20 has an audio control unit 25. The audio control unit 25 executes electrical control of the audio transmitting device 20. The audio control unit 25 includes an arithmetic processing unit that executes a predetermined control program. The arithmetic processing unit includes, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The audio control unit 25 may include one or more microcomputers. The audio control unit 25 is mounted on, for example, an electric board 25A housed in the housing case 24. The electric board 25A is composed of one or more boards. The audio control unit 25 is configured to receive the audio V acquired by the microphone unit 21.

[0020] The audio control unit 25 is configured to generate audio data VD based on the audio V acquired by the microphone unit 21. The audio control unit 25 receives the audio V acquired by the microphone unit 21 directly. The audio control unit 25 has an ADC (Analog Digital Converter) circuit. The ADC circuit converts an analog signal into a digital signal. The audio control unit 25 generates audio data VD based on the audio V by the ADC circuit. The audio control unit 25 may have a DSP (Digital Signal Processor) circuit. The DSP circuit digitally processes the digital signal.

[0021] The audio transmitting device 20 has an audio communication unit 26. The audio communication unit 26 can be connected to a network NT through, for example, cellular communication such as LTE (Long Term Evolution) and 5G, and LAN communication such as Wi-Fi. The audio communication unit 26 communicates with a device different from the audio transmitting device 20 via the network NT. The network NT is, for example, the Internet. The audio communication unit 26 is mounted on an electric board 25A.

[0022] The voice transmitting device 20 has a position sensor 27. The position sensor 27 acquires position information of the voice transmitting device 20. The position information is, for example, the position coordinates of the voice transmitting device 20. Examples of the position sensor 27 include a sensor that can use a global positioning satellite system (GNSS; Global Navigation Satellite System) such as a Global Positioning System (GPS), a Quasi-Zenith Satellite System (QZSS), or Galileo operated by Europe. The position sensor 27 may be an indoor position system (IPS), a Bluetooth Low Energy (BLE, registered trademark) beacon, or an ultra wide band (UWB). The position sensor 27 is mounted on the electric board 25A.

[0023] As shown in FIG. 2 and FIG. 4, the voice transmitting device 20 transmits the voice V of the speaker S from a loudspeaker 20X that loudspeaks the voice V of the speaker S to the surroundings. The voice transmitting device 20 is connected to a server 30, for example, via a network NT. The voice transmitting device 20 transmits the voice V of the speaker S by transmitting voice data VD generated from the voice V to the server 30. The voice transmitting device 20 includes a voice acquiring means 20A, a voice converting means 20B, and a position acquiring means 20C. In this embodiment, the voice converting means 20B and the position acquiring means 20C are built into the loudspeaker 20X. In this embodiment, a voice communication unit 26 is further built into the loudspeaker 20X.

[0024] The voice acquiring means 20A acquires the voice V during amplification. The voice acquiring means 20A includes at least one of a microphone unit 21, an amplifier unit 22, and a speaker unit 23. In one example, the voice acquiring means 20A acquires a signal output from the microphone unit 21 as the voice V. The voice acquiring means 20A may acquire the voice V from a signal input to the amplifier unit 22 or a signal input to the speaker unit 23. In this embodiment, the voice acquiring means 20A is a microphone that receives the voice V of the speaker S of the loudspeaker 20X. In this embodiment, the microphone is the microphone unit 21.

[0025] The voice conversion means 20B converts the voice V acquired by the voice acquisition means 20A into voice data VD. The voice conversion means 20B includes a voice control unit 25. The voice control unit 25 digitizes the voice V acquired by the microphone unit 21, thereby converting it into voice data VD.

[0026] The position acquisition means 20C acquires amplification position data PD indicating the position of the voice transmitting device 20 when the voice V is amplified. When the voice V is amplified, it indicates the time when the voice acquisition means 20A acquires the voice V. When the voice V is amplified, it is, for example, when the amplification of the voice V starts. The amplification position data PD indicates the position of the loudspeaker 20X at the time of amplification. The position acquisition means 20C may acquire the amplification position data PD at regular intervals while the voice V is being amplified. The amplification position data PD includes position information of the voice transmitting device 20 when the voice acquisition means 20A acquires the voice V. The position acquisition means 20C includes a position sensor 27. The voice control unit 25 acquires the amplification position data PD from the position acquisition means 20C.

[0027] The voice transmitting device 20 transmits the voice data VD and the amplified voice position data PD to the server 30. The voice control unit 25 transmits the voice data VD and the amplified voice position data PD to the server 30 by the voice communication unit 26 via the network NT.

[0028] The voice transmitting device 20 may transmit the amplified time data TD to the server 30 simultaneously with the voice data VD. The amplified time data TD is data relating to the time when the voice V was amplified. The voice control unit 25 generates the amplified time data TD from the time when the voice V was amplified.

[0029] The voice transmitting device 20 may be configured to switch the output state of the voice transmitting device 20 between a first output state and a second output state. The first output state is a state in which the voice transmitting device 20 transmits the voice data VD and the amplification position data PD to the server 30. The second output state is a state in which the voice transmitting device 20 does not transmit the voice data VD and the amplification position data PD to the server 30. When the output state is the second output state, the voice transmitting device 20 functions only as a transistor megaphone. The housing case 24 may be formed with a switch for switching between the first output state and the second output state.

[0030] <Server> As shown in FIG. 1, FIG. 2, and FIG. 4, the server 30 provides voice data VD to a user terminal 80 of a user U based on a request from the user U. The server 30 is, for example, a cloud server accessible via the Internet. The server 30 is, for example, configured with one or more server devices. The server 30 is connected to a network NT, for example, by a LAN (Local Area Network). The server 30 receives, from the loudspeaker device 20X via the network NT, voice data VD relating to the voice V during loudspeaker operation and loudspeaker position data PD indicating the position of the loudspeaker device 20X.

[0031] The server 30 includes a server main body 31. The server main body 31 acquires the voice data VD and the amplified position data PD from the voice transmitting device 20. The voice data VD is data of the voice V that is amplified to unspecified people. The amplified position data PD is data linked to the voice data VD. The voice data VD in this embodiment is data of the voice V acquired by the voice acquisition means 20A of the voice transmitting device 20. The amplified position data PD is data related to the amplified position of the voice V in the voice transmitting device 20. The amplified position data PD is transmitted from the voice transmitting device 20 to the server 30 together with the voice data VD.

[0032] The server main body 31 has a server control unit 32 and a server storage unit 33. The server control unit 32 controls the electrical processing performed by the server 30. The server control unit 32 includes a processing unit that executes a predetermined control program. The processing unit includes, for example, a CPU or an MPU. The server control unit 32 may include one or more microcomputers.

[0033] The server storage unit 33 stores the control program of the server control unit 32 and information used in the control process. The server storage unit 33 includes, for example, at least one of a nonvolatile memory and a volatile memory. The nonvolatile memory includes, for example, at least one of a ROM (Read-Only Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), and a flash memory. The volatile memory includes, for example, a RAM (Random Access Memory). The server storage unit 33 may include, for example, a storage device in addition to or instead of at least one of the nonvolatile memory and the volatile memory. The storage device includes, for example, at least one of an HDD (Hard Disk Drive) and an SSD (Solid State Drive).

[0034] The server 30 includes a server communication unit 34. The server communication unit 34 is connected to the network NT via a LAN. The server communication unit 34 communicates with the audio communication unit 26 via the network NT.

[0035] As shown in FIGS. 1, 2, 4, and 5, in the server 30, the voice data VD is associated with the amplified position data PD, and the voice data VD is stored so as to be able to be provided to an external user terminal 80 in response to a request from the user terminal 80. The server main body 31 stores the voice data VD in such a manner that the voice data VD is linked to a specific position SP. The specific position SP is identified based on the amplified position data PD. The specific position SP is a location in the facility 1 where the voice transmitting device 20 is used. The specific position SP is a location where the voice V, which is the basis of the voice data VD, is amplified by the voice transmitting device 20. The server storage unit 33 stores the identified specific position SP for each voice transmitting device 20.

[0036] The server storage unit 33 stores a plurality of specific positions SP in advance. When the facility 1 is a building such as a shopping mall, an office building, a school, a research institute, a government building, a factory, or a stadium, the names of, for example, an entrance / exit, a passageway, an elevator, an escalator, a shop, a cash register, a toilet, etc. are set to the plurality of specific positions SP. When the facility 1 is a train or subway station, the names of, for example, an entrance / exit, a concourse, a ticket gate, a platform, a boarding area, a shop, a toilet, etc. are set to the plurality of specific positions SP. When the facility 1 is a bus stop, the names of bus stops set for each route, destination, etc. are set to the plurality of specific positions SP. When the facility 1 is an airport, the names of, for example, a counter, a gate, a boarding gate, a shop, a toilet, etc. are set to the plurality of specific positions SP. For example, FIG. 5 shows an example of a specific position SP when the facility 1 is a train station.

[0037] For example, when the loudspeaker position data PD linked to the voice data VD in the voice transmitting device 20 is a position coordinate, the server control unit 32 identifies one of the multiple specific positions SP from the position coordinate. For example, the server control unit 32 identifies the specific position SP closest to the position coordinate. The server control unit 32 may identify two or more of the multiple specific positions SP from one position coordinate when it is not possible to identify one specific position SP from the position coordinate.

[0038] The server 30 stores the voice data VD in association with the amplified time T. The amplified time T is the time when the voice V, which is the source of the voice data VD, was amplified. The server control unit 32 generates the amplified time T from the amplified time data TD transmitted from the voice transmitting device 20 in accordance with the voice data VD. As in the example of FIG. 5, the amplified time T may include not only a time but also a date.

[0039] The server storage unit 33 stores a plurality of pieces of voice data VD for each specific position SP. The server storage unit 33 may store amplified time T of the voice data VD. The server control unit 32 has a function of creating an audio file of the voice V that is the basis of the voice data VD for each acquired voice data VD. Specifically, the server control unit 32 creates an audio file in a predetermined format (e.g., mp3) by encoding the voice data VD. The audio file created by the server control unit 32 is stored in the server storage unit 33. The voice data VD stored in the server storage unit 33 may be, for example, an audio file created by the server control unit 32.

[0040] The server 30 stores, for example, predetermined voice data. The predetermined voice data is one of a plurality of voice data VD. When the server 30 stores the predetermined voice data of the voice data VD, the server 30 is configured to delete the predetermined voice data after a predetermined period of time has elapsed from the amplified time T of the predetermined voice data. The predetermined period corresponds, for example, to a period during which the voice data VD is stored in the server 30. For example, when the predetermined period is set to 24 hours, the server 30 stores the voice data VD for the past 24 hours. The predetermined period is set, for example, by an administrator of the server 30. The predetermined period may be changed according to the contents of the predetermined voice data. For example, when the importance of the predetermined voice data is high, the predetermined period is set to be long.

[0041] As shown in FIG. 2 and FIG. 6, the server 30 is configured to store the voice data VD after deleting the specific voice part SAP of the voice data VD. The specific voice part SAP is a part including a specific word SW of the voice data VD. The specific voice part SAP is, for example, a part of the voice V that is relatively unimportant to a user U who receives the delivery of the voice data VD. The specific voice part SAP is, for example, a part of the voice V that is relatively unimportant other than the specific position SP. The specific word SW is a word for identifying the specific voice part SAP of the voice V. The specific word SW is set by, for example, an administrator of the server 30, as a word such as "Please do not press," "Please do not stop," or "Please proceed." In the example of FIG. 6, the specific word SW is "Please do not press," which is shaded.

[0042] When the voice V contains the specific word SW a predetermined number of times or more within a certain period of time, the server control unit 32 determines the portion of the voice data VD containing the specific word SW as a specific voice part SAP. When the server control unit 32 acquires the voice data VD, it determines whether the voice V on which the voice data VD is based contains the specific word SW. When the voice V on which the voice data VD is based contains the specific word SW a predetermined number of times or more, the server control unit 32 performs a process of deleting a phrase containing the specific word SW. For example, the server control unit 32 searches for the specific word SW from a sentence transcribed from the voice data VD. When the specific word SW is contained in the sentence a predetermined number of times or more, the server control unit 32 deletes the specific voice part SAP containing the specific word SW.

[0043] Fig. 6 illustrates an example in which the specific word SW is "Please do not press" and the predetermined number of times is three. In the example of Fig. 6, the voice data VD repeats "Please do not press," which is an example of the specific word SW, three times. The server control unit 32 deletes the specific voice portion SAP containing "Please do not press," and then stores the voice data VD of the portion "Thank you for visiting us today. If you are heading toward XX Station, please exit from Exit A. Currently, the area around Exit A is very crowded," in the server storage unit 33.

[0044] As shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 7, the server 30 further includes a text data generating means 35. The text data generating means 35 generates text data ED from the voice data VD. The text data generating means 35 includes, for example, a server control unit 32. The server control unit 32 generates the text data ED by, for example, transcribing the voice V based on the voice data VD. An example of the text data ED is a text file. The text data ED is stored, for example, in the server storage unit 33. The server main body unit 31 stores the text data ED in such a manner that it is linked to the original voice data VD.

[0045] The server 30 stores the voice data VD and the text data ED generated from the voice data VD in such a manner that the data is associated with each other. Based on the location information included in the request from the user terminal 80, the server 30 transmits to the user terminal 80 the text data ED associated with the voice data VD in addition to or instead of the voice data VD associated with the specific position SP corresponding to the location information.

[0046] The server 30 provides the user terminal 80 with text data ED generated from the voice data VD based on a request from the user U. When a portion of the text data ED is selected by the user U, the server 30 transmits a predetermined portion of the voice data VD related to the portion of the text data ED to the user terminal 80. The predetermined portion is, for example, a portion starting from a portion of the voice data VD. The predetermined portion may be a portion including the voice V before and after the portion of the voice data VD, or may be a portion including only a portion of the voice data VD.

[0047] <User device> 1 and 2, the user terminal 80 is, for example, a computer terminal. The user terminal 80 is connected to the server 30 by wireless communication. The user terminal 80 may be connected to the server 30 via a network NT by, for example, a wireless WAN such as LTE, or may be connected to the server 30 via the network NT by a LAN. The user terminal 80 may be included in the voice transmission system 10, or may be provided separately from the voice transmission system 10.

[0048] The user terminal 80 is used by a user U. The user terminal 80 is, for example, an information processing device having a CPU or an MPU. An example of the user terminal 80 is a terminal such as a mobile phone, a smartphone, or a tablet computer. The user terminal 80 may be a personal computer. The user terminal 80 may be composed of two or more terminals.

[0049] The user terminal 80 has a location information acquisition means. The location information acquisition means acquires location information of the user terminal 80. The location information acquisition means includes, for example, a terminal location sensor. Examples of the terminal location sensor include a sensor that can use GPS, QZSS, or GNSS such as Galileo operated by Europe. The terminal location sensor may be an IPS, a BLE beacon, or a UWB.

[0050] 7, the user terminal 80 includes a display unit 81. The display unit 81 is, for example, a display. The user terminal 80 is configured to cause the display unit 81 to display data acquired from the server 30.

[0051] An OS (Operating System) and an application for connecting to the voice transmission system 10 are installed in the user terminal 80. The application includes, for example, a web browser. The application has a function of displaying an interface of the voice transmission system 10 obtained from the server 30 on the display unit 81. The interface of the voice transmission system 10 is displayed so that the user U can access the voice transmission system 10. The interface of the voice transmission system 10 is generated as a web page that can be displayed by a program such as a browser or a native application.

[0052] As shown in Figs. 1, 2, and 7, the user terminal 80 displays the content of the voice V, which is the basis of the voice data VD, in the form of text on the display unit 81 based on the text data ED. The user terminal 80 may generate the text data ED from the voice data VD. The display unit 81 of the user terminal 80 displays text based on the text data ED so that the user U can select a portion of the text data ED. For example, the user U can select a portion of the text data ED by tapping on the text displayed on the display unit 81.

[0053] In the example of FIG. 7, the shaded portion "It's the same, but..." indicates the portion selected by the user U. The server 30 transmits the voice data VD starting from the portion corresponding to "It's the same, but..." to the user terminal 80. The user terminal 80 plays back the voice data VD starting from the portion corresponding to "It's the same, but...". The example of FIG. 7 shows a case where the sentence is "It's the same, but..." when actually played back, the content becomes "I'm sorry." When the user U feels something is wrong with the sentence due to misconversion of the sentence, garbled characters, etc., he or she can check the content of the sentence by actually playing back the voice V.

[0054] <Transmitting voice data in response to user requests> 1, 2, 5, and 7 to 10, the server 30 extracts the voice data VD associated with the loudspeaker position data PD corresponding to the position information based on a request including the position information indicating a specific position SP. The position information may be coordinates of a predetermined position, or may be information indicating the location of the facility 1, such as the address of the facility 1, the name of the facility 1, etc. The server 30 transmits the extracted voice data VD to an external user terminal 80. The request is transmitted from the external user terminal 80. The request is, for example, a request from a user U.

[0055] The user terminal 80 transmits a request of the user U to the server 30 by the application. The request of the user U is, for example, a request to transmit voice data VD at a specific specific position SP. Based on the location information included in the request from the user terminal 80, the server 30 transmits the voice data VD linked to the specific position SP corresponding to the location information to the user terminal 80. Based on the specific position SP specified by the user terminal 80, the server main body unit 31 transmits the voice data VD linked to the specific position SP to the user terminal 80. The user terminal 80 plays the voice V at the specific position SP based on the voice data VD.

[0056] The specific position SP is specified by the user terminal 80 in accordance with either the first example or the second example. The user terminal 80 is configured to be able to specify the specific position SP in accordance with at least one of the first example and the second example.

[0057] <Example 1> The first example is an example in which the server 30 transmits, to the user terminal 80, voice data VD linked to a specific position SP corresponding to the current position of the user U. In the first example, the request from the user terminal 80 includes location information indicating the current position of the user U acquired by the user terminal 80. The current position of the user U is, for example, the location where the user U is currently located. The user terminal 80 is configured to acquire the current position of the user U, for example, by a location information acquisition means. The user terminal 80 identifies the current position of the user U from coordinate information acquired by a function such as GPS, QZSS, Galileo, IPS, BLE beacon, UWB, etc.

[0058] The server 30 is configured to acquire the current location of the user U from the user terminal 80. The user terminal 80 is configured to periodically transmit the current location of the user U to the server 30. The user terminal 80 may be configured to transmit the current location of the user U to the server 30 every time the current location of the user U changes. When the current location of the user U is a specific location SP, the server 30 notifies the user terminal 80 that it stores voice data VD linked to the specific location SP. Upon receiving the notification from the server 30, the user terminal 80 notifies the user U that the server 30 stores voice data VD linked to the specific location SP.

[0059] For example, when the user U receives a notification from the user terminal 80, the user terminal 80 transmits a request to the server 30 to request that the server 30 transmit voice data VD. In response to the request from the user U, the server 30 transmits to the user terminal 80 the voice data VD associated with the specific position SP corresponding to the current position of the user U. The user terminal 80 plays the voice data VD received from the server 30.

[0060] With reference to Fig. 8, a process in which the voice transmitting system 10 transmits voice data VD to the user terminal 80 in the first example will be described. When the voice transmitting device 20 acquires the voice V of the speaker S (S11), it generates voice data VD from the voice V (S12). The voice transmitting device 20 transmits the voice data VD to the server 30 together with the amplification position data PD and the amplification time data TD (S13). The server 30 identifies a specific position SP including the position of the amplification position data PD from among the specific positions SP stored in advance (S14), and then associates the voice data VD with the specific position SP and stores it in the server storage unit 33 (S15).

[0061] When the user terminal 80 acquires the current location of the user U (S16), it transmits the current location of the user U to the server 30 (S17). The server 30 stores the current location of the user U in the server storage unit 33 (S18). The processes from S16 to S18 may be performed before the processes from S11 to S15.

[0062] The server 30 determines whether or not the voice data VD associated with the specific position SP corresponding to the current location of the user U is stored in the server storage unit 33 (S19). If the voice data VD associated with the specific position SP corresponding to the current location of the user U is stored in the server storage unit 33, the server 30 transmits a notification to the user terminal 80 (S20). In response to an operation by the user U, the user terminal 80 transmits a request to the server 30 (S21). The server 30 transmits the voice data VD to the user terminal 80 (S22). The user terminal 80 plays the voice data VD (S23).

[0063] <Second Example> The second example is an example in which the server 30 transmits, to the user terminal 80, audio data VD associated with a specific position SP corresponding to a desired position of the user U. In the second example, the request from the user terminal 80 includes location information indicating the desired position input by the user U. The desired position of the user U is, for example, a location where the user U wants to listen to audio data VD to be played in the future or audio data VD played in the past. The user terminal 80 is configured to acquire the desired position of the user U, for example, by an input from the user U. The user terminal 80 prestores desired positions corresponding to each of a plurality of specific positions SP.

[0064] The user terminal 80 is configured to allow the user U to input a desired location. For example, the user terminal 80 displays a map on the display unit 81, on which a plurality of specific locations SP are displayed. The user U selects a specific location SP from the map displayed on the display unit 81. The specific location SP selected by the user U is set as the desired location of the user U. The user terminal 80 transmits the desired location to the server 30. The plurality of specific locations SP may be presented to the user U in a list format such as a table. The desired location may be the current location of the user U.

[0065] The server 30 is configured to input a desired location of the user U from the user terminal 80. When the user U selects a predetermined specific location SP, the user terminal 80 transmits the desired location of the user U to the server 30. When the desired location is the specific location SP, the server 30 notifies the user terminal 80 that it has stored voice data VD associated with the specific location SP. Upon receiving the notification from the server 30, the user terminal 80 notifies the user U that the server 30 has stored voice data VD associated with the specific location SP.

[0066] For example, when the user U receives a notification from the user terminal 80, the user terminal 80 transmits a request to the server 30 to request that the server 30 transmit voice data VD. In response to the request from the user U, the server 30 transmits the voice data VD associated with the specific position SP corresponding to the desired position to the user terminal 80. The user terminal 80 plays the voice data VD received from the server 30.

[0067] 9, a process in which the voice transmitting system 10 transmits voice data VD to the user terminal 80 in the second example will be described. When the voice transmitting device 20 acquires the voice V of the speaker S (S31), it generates voice data VD from the voice V (S32). The voice transmitting device 20 transmits the voice data VD to the server 30 together with the amplification position data PD and the amplification time data TD (S33). The server 30 identifies a specific position SP including the position of the amplification position data PD from among the specific positions SP stored in advance (S34), and then associates the voice data VD with the specific position SP and stores it in the server storage unit 33 (S35).

[0068] When the user terminal 80 acquires the desired location of the user U (S36), it transmits the desired location of the user U to the server 30 (S37). The server 30 stores the desired location of the user U in the server storage unit 33 (S38). The processes from S36 to S38 may be performed before the processes from S31 to S35.

[0069] The server 30 determines whether or not the voice data VD associated with the specific position SP corresponding to the desired position of the user U is stored in the server storage unit 33 (S39). If the voice data VD associated with the specific position SP corresponding to the desired position of the user U is stored in the server storage unit 33, the server 30 transmits a notification to the user terminal 80 (S40). In response to an operation by the user U, the user terminal 80 transmits a request to the server 30 (S41). The server 30 transmits the voice data VD to the user terminal 80 (S42). The user terminal 80 plays the voice data VD (S43).

[0070] In S22 of the first example or S42 of the second example, the server 30 may transmit the text data ED, or both the voice data VD and the text data ED, to the user terminal 80. Whether the server 30 transmits the voice data VD or the text data ED to the user terminal 80 may be included in the request transmitted from the user terminal 80 to the server 30 in S21 of the first example or S41 of the second example.

[0071] <Example 3> The request from the user U may include a request to transmit text data ED in addition to or instead of the request to transmit the voice data VD. In the third example shown in Fig. 10, the server main body 31 transmits at least one of the voice data VD and the text data ED linked to the specific position SP to the user terminal 80 based on the specific position SP designated by the user terminal 80.

[0072] 10, a process in which the server 30 transmits at least one of the voice data VD and the text data ED to the user terminal 80 in the third example will be described. Fig. 10 shows a third example in which the current location of the user U corresponds to the specific location SP as in the first example, but the desired location of the user U may also correspond to the specific location SP as in the second example.

[0073] When the voice transmitting device 20 acquires the voice V of the speaker S (S51), it generates voice data VD from the voice V (S52). The voice transmitting device 20 transmits the voice data VD together with the amplified position data PD and the amplified time data TD to the server 30 (S53). The server 30 generates text data ED from the received voice data VD (S54). The server 30 identifies a specific position SP including the position of the amplified position data PD from among the specific positions SP stored in advance (S55), and then associates the voice data VD and the text data ED with the specific position SP and stores them in the server storage unit 33 (S56). The process of generating the text data ED from the voice data VD in S54 may be performed after the voice data VD is stored in the server storage unit 33 in S56.

[0074] When the user terminal 80 acquires the current location of the user U (S57), it transmits the current location of the user U to the server 30 (S58). The server 30 stores the current location of the user U in the server storage unit 33 (S59). The processes from S57 to S59 may be performed before the processes from S51 to S56.

[0075] The server 30 determines whether or not the voice data VD associated with the specific position SP corresponding to the current location of the user U is stored in the server storage unit 33 (S60). If the voice data VD associated with the specific position SP corresponding to the current location of the user U is stored in the server storage unit 33, the server 30 transmits a notification to the user terminal 80 (S61).

[0076] The user terminal 80 transmits a request to the server 30 in response to an operation by the user U (S62). The request of S62 transmits a request specifying one of the voice data VD only, the text data ED only, and both the voice data VD and the text data ED. The user terminal 80 is configured to allow the user U to select one of the voice data VD only, the text data ED only, and both the voice data VD and the text data ED. The server 30 transmits at least one of the voice data VD and the text data ED specified in the request of S62 to the user terminal 80 (S63). The user terminal 80 plays the voice data VD or displays the text data ED (S64).

[0077] In the process of S63, after the server 30 transmits only the voice data VD to the user terminal 80, the server 30 may transmit the text data ED to the user terminal 80 in response to a text addition request from the user U. The text addition request is transmitted from the user terminal 80 to the server 30 in response to an operation by the user U during or after playback of the voice data VD reproduced in the process of S64. For example, if the voice V reproduced by the user terminal 80 is difficult to hear, the server 30 can be requested to transmit the text data ED by the text addition request, thereby enabling the difficult-to-hear part of the voice V to be confirmed by the text.

[0078] In the process of S63, after the server 30 transmits only the text data ED to the user terminal 80, the server 30 may transmit the voice data VD to the user terminal 80 in response to a voice addition request from the user U. The voice addition request is transmitted from the user terminal 80 to the server 30 in response to an operation by the user U after the text data ED is displayed in the process of S64.

[0079] <Operation of the embodiment> A first effect of this embodiment will be described. Public address devices are used in stations, airports, public facilities, etc., to broadcast information about facilities 1, announcements of events, guidance during disasters, etc. to unspecified people. One example of a public address device is a megaphone. Megaphones are used in a wide range of situations because they are portable and have a narrow directivity of broadcast sound, making it possible to effectively amplify sound V to people who need to hear the broadcast. However, even if a person is within the sound reach of the public address device, they may miss the sound V due to surrounding noise, wearing earphones, etc. Also, there are cases where a person who is not around the public address device wants to hear the sound V from the public address device.

[0080] In the voice transmission system 10, the voice transmission device 20 amplifies the voice V of the speaker S and transmits the voice data VD and the amplified position data PD generated from the voice V to the server 30. In the server 30, the voice data VD is stored in association with the specific position SP. The server 30 identifies the specific position SP from the amplified position data PD associated with the voice data VD. The user U can select the voice data VD at the specific position SP by selecting a specific position SP from a plurality of specific positions SP. Since the specific position SP is, for example, the name of a facility of the facility 1, the user U can easily select a specific position SP from a plurality of specific positions SP. Since the voice data VD is managed in the server 30, the user U can listen to the voice V at the specific position SP by playing the voice data VD with a user terminal 80 that can be connected to the server 30. Since the user terminal 80 is a portable terminal such as a smartphone, the user U can listen to the voice V at the specific position SP wherever he or she is.

[0081] For example, by providing a user U with a voice V such as an announcement of the progress of an event or a speech by an election candidate by the voice transmission system 10, the user U who is in a location far from the venue where the voice V is being broadcast can hear the voice V. By adding information that attracts the interest of the user U such as a notice or advertisement to the voice V, the user U who is not at the venue can be encouraged to visit the venue.

[0082] A second effect of this embodiment will be described. The voice data VD is stored with the specific voice portion SAP deleted. The specific voice portion SAP is a portion of the voice data VD that is relatively less important. In addition, the specified voice data of the voice data VD is deleted when a specified period of time has passed since the amplified time T. Voice V broadcast by a megaphone or the like often contains highly urgent information such as emergency broadcasts, and therefore older voice data VD is relatively less important. In this way, voice data VD with low importance is sequentially deleted in the server 30, so that the storage capacity of the server 30 is unlikely to increase.

[0083] <Effects of the embodiment> The effects of this embodiment will be described. (1-1) The voice transmitting device 20 includes a voice acquiring means 20A, a voice converting means 20B, and a position acquiring means 20C. The voice transmitting device 20 transmits voice data VD and loudspeaker position data PD to the server 30. The voice transmitting device 20 is a portable loudspeaker 20X.

[0084] According to this configuration, the voice data VD is transmitted to the server 30 together with the amplification position data PD, so that a user U who wants to listen to the voice V at the amplification position can obtain the voice data VD via the server 30. Therefore, since the user U can obtain the voice data VD via the server 30, the voice transmitting device 20 can suitably provide the voice V to the user U.

[0085] (1-2) The loudspeaker device 20X is a megaphone. The megaphone has a grip part 24A that can be held by the speaker S.

[0086] According to this configuration, the voice transmitting device 20 can be configured as a megaphone. The voice transmitting device 20 can transmit the voice V amplified by the megaphone to the server 30.

[0087] (1-3) The voice acquisition means 20A is a microphone that receives the voice V of the speaker S of the loudspeaker 20X. The voice conversion means 20B and the position acquisition means 20C are built into the loudspeaker 20X.

[0088] According to this configuration, the voice conversion means 20B and the position acquisition means 20C are built into the loudspeaker 20X, so that the voice transmitting device 20 can be conveniently carried around.

[0089] (1-4) The voice transmission system 10 includes a voice transmission device 20 and a server 30. The server 30 extracts voice data VD associated with amplification position data PD corresponding to the position information, based on a request including position information indicating a specific position SP transmitted from an external user terminal 80. The server 30 transmits the extracted voice data VD to the external user terminal 80.

[0090] According to this configuration, the voice data VD is transmitted from the server 30 to the user terminal 80, so that the user U can hear the voice V based on the voice data VD by playing the voice data VD on the user terminal 80.

[0091] (1-5) The server 30 receives, from the portable loudspeaker device 20X via the network NT, audio data VD relating to the audio V during loudspeaker amplification and loudspeaker position data PD indicating the position of the loudspeaker device 20X. The server 30 stores the audio data VD so as to be linked to a specific position SP identified based on the loudspeaker position data PD. Based on position information included in a request from the user terminal 80, the server 30 transmits to the user terminal 80 the audio data VD linked to the specific position SP corresponding to the position information.

[0092] According to this configuration, the voice data VD is associated with the specific position SP and stored in the server 30, so that the voice data VD at the specific position SP can be transmitted to the user terminal 80 in response to a request from the user U. The user U can hear the voice V based on the voice data VD by playing the voice data VD on the user terminal 80. Therefore, since the user U can play back the voice data VD on the user terminal 80, the server 30 can suitably provide the voice V to the user U.

[0093] (1-6) The request from the user terminal 80 includes location information indicating the current location of the user U acquired by the user terminal 80. In response to the request from the user terminal 80, the server 30 transmits to the user terminal 80 the voice data VD associated with the specific position SP corresponding to the current location of the user U.

[0094] According to this configuration, the voice data VD at the specific position SP corresponding to the current position is transmitted to the user terminal 80, so that the user U can hear the voice V amplified at the current position based on the voice data VD. Therefore, the user U who could not hear or could not hear the voice V can understand the content of the voice V based on the voice data VD.

[0095] (1-7) The request from the user terminal 80 includes location information indicating the desired location input by the user U. In response to the request from the user terminal 80, the server 30 transmits, to the user terminal 80, voice data VD associated with a specific location SP corresponding to the desired location of the user U.

[0096] According to this configuration, the voice data VD at the specific position SP corresponding to the desired position is transmitted to the user terminal 80, so that the user U can hear the voice V amplified at the desired position based on the voice data VD. Examples of the desired position of the user U are places such as an amusement park, an event venue, and an election speech venue. Even if the user U wants to go to the above-mentioned places but cannot because of distance, illness, or other reasons, the user U can hear the voice V based on the voice data VD, and thus feel as if he or she has been to or participated in the above-mentioned places.

[0097] (1-8) The server 30 stores the voice data VD in such a manner that the data is linked to the amplified time T at which the voice V on which the voice data VD is based was amplified. When the server 30 stores predetermined voice data of the voice data VD, the server 30 is configured to delete the predetermined voice data when a predetermined period of time has elapsed since the amplified time T of the predetermined voice data.

[0098] According to this configuration, the server 30 sequentially deletes old voice data VD for which a predetermined period of time has elapsed since the voice V was amplified. Therefore, an increase in the amount of voice data VD stored in the server 30 can be suppressed. The predetermined period is, for example, a storage period for the voice data VD in the server 30. The storage period for the voice data VD may be changed by changing the predetermined period according to the content of the predetermined voice data. For example, if the predetermined voice data is about an emergency situation such as a fire in the facility 1, the predetermined period may be set to be short in order to store more recent situations in the server 30. For example, if the predetermined voice data is an election speech, the predetermined period may be set to a certain number of days after the election day in order to store the predetermined voice data until the election day.

[0099] (1-9) The server 30 is configured to store the voice data VD after deleting a specific voice part SAP from the voice data VD. The specific voice part SAP is a part of the voice data VD that includes a specific word SW.

[0100] According to this configuration, the voice data VD is stored after deleting the specific voice portion SAP, so that an increase in the amount of voice data VD stored in the server 30 can be suppressed. The specific word SW is a word for identifying a portion of the voice V that has low importance. The specific voice portion SAP that includes the specific word SW has a relatively low importance. Since the server 30 stores the voice data VD of a portion of the voice V that has a relatively high importance, when the user U listens to the voice V based on the voice data VD, the user U can reach the important portion of the voice V in a short time.

[0101] (1-10) The server 30 further includes a text data generating means 35. The text data generating means 35 generates text data ED from the voice data VD. The server 30 stores the voice data VD and the text data ED generated from the voice data VD in such a manner that the data is linked to the voice data VD. Based on the location information included in the request from the user terminal 80, the server 30 transmits to the user terminal 80 the text data ED linked to the voice data VD in addition to or instead of the voice data VD linked to the specific position SP corresponding to the location information.

[0102] According to this configuration, the user U can confirm the contents of the voice V by the text data ED. When a user wants to confirm a part of the text data ED by the voice V, the user U can play back the voice V from the part he / she wants to confirm. In the example of FIG. 7, the voice V plays back "Excuse me, but after the performance...". The user U can select a part that is unnatural because it does not match the context of the text, is garbled, or the like, as in "It's a matching item" in FIG. 7, and can listen to the voice V of the part that is unnatural. This allows the user U to understand the correct contents of the voice V. In addition, the contents of the voice V are displayed on the display unit 81 of the user terminal 80 by text based on the text data ED, so that even a visually impaired person can understand the contents of the voice V. The server control unit 32 may be configured to automatically translate the text. By automatically translating the text, even a foreigner who does not understand Japanese can understand the contents of the voice V.

[0103] <Second embodiment> A voice transmitting system 10, a voice transmitting device 20, and a server 30 according to the second embodiment will be described with reference to Fig. 1 and Fig. 11. Note that in this embodiment, configurations that are substantially unchanged from those in the first embodiment will be described with the same reference numerals as those in the first embodiment.

[0104] The voice transmission system 10 of the present embodiment includes a voice transmission device 20 and a mobile communication terminal 40. The mobile communication terminal 40 is provided separately from the voice transmission device 20. The mobile communication terminal 40 communicates with a server 30 via a network NT. The server 30 is configured similarly to the server 30 of the first embodiment. The mobile communication terminal 40 is connected to the voice transmission device 20 by short-range communication.

[0105] The voice transmitting device 20 of the present embodiment has an additional communication unit 26A for performing short-distance communication with the mobile communication terminal 40. The additional communication unit 26A performs wireless communication with the mobile communication terminal 40, for example, by Bluetooth (registered trademark). The additional communication unit 26A transmits voice data VD based on the voice V acquired by the microphone unit 21 to the mobile communication terminal 40.

[0106] The mobile communication terminal 40 is, for example, an information processing device having a CPU or an MPU. An example of the mobile communication terminal 40 is a terminal such as a mobile phone, a smartphone, or a tablet computer. The mobile communication terminal 40 may be a personal computer. The mobile communication terminal 40 may be composed of two or more terminals.

[0107] The portable communication terminal 40 includes an audio communication unit 26 and a position sensor 27. The audio communication unit 26 and the position sensor 27 are omitted from the audio transmitting device 20 of this embodiment.

[0108] The voice transmitting device 20 includes a voice acquiring means 20A and a voice converting means 20B. The voice acquiring means 20A of the present embodiment includes at least one of a microphone unit 21, an amplifier unit 22, and a speaker unit 23. The voice converting means 20B of the present embodiment includes a voice control unit 25.

[0109] The mobile communication terminal 40 has a position acquisition means 20C that acquires position data of the mobile communication terminal 40. The position acquisition means 20C of this embodiment includes a position sensor 27 of the mobile communication terminal 40. The mobile communication terminal 40 receives voice data VD from the voice transmitting device 20 by short-range communication. The mobile communication terminal 40 transmits the voice data VD and the position data of the mobile communication terminal 40 to the server 30.

[0110] <Effects of the embodiment> The effects of this embodiment will be described. (2) Since the mobile communication terminal 40 has the position acquisition means 20C, the voice transmitting device 20 does not need the position acquisition means 20C. This makes it possible to easily configure the voice transmitting device 20. For example, the voice transmitting system 10 can be configured by providing an additional communication unit 26A to an existing loudspeaker.

[0111] <Third embodiment> A voice transmitting system 10, a voice transmitting device 50, and a server 30 according to the third embodiment will be described with reference to Fig. 1, Fig. 12, and Fig. 13. Note that in this embodiment, configurations that are substantially unchanged from those in the first embodiment will be described with the same reference numerals as those in the first embodiment.

[0112] As shown in Fig. 1 and Fig. 12, the voice transmitting device 50 of this embodiment is modularized separately from the loudspeaker 60. The voice transmitting device 50 is configured as a module that can be attached (externally) to the loudspeaker 60. The loudspeaker 60 amplifies the voice V. The loudspeaker 60 has a main body microphone unit 61, a main body amplifier unit 62, and a main body speaker unit 63. The loudspeaker 60 amplifies the voice V acquired by the main body microphone unit 61 by amplifying it in the main body amplifier unit 62 and then outputting it from the main body speaker unit 63, thereby amplifying the voice V.

[0113] The loudspeaker 60 is, for example, a portable transistor megaphone. The loudspeaker 60 is not limited to a megaphone, and may be equipment such as broadcasting equipment, a radio cassette recorder, or a CD player provided in the facility 1 as long as it can amplify the sound V. The loudspeaker 60 includes a main body case 64. The main body case 64 is made of, for example, resin. The main body microphone section 61, the main body amplifier section 62, and the main body speaker section 63 are housed in the main body case 64.

[0114] The loudspeaker 60 includes a main body grip 64A. The main body grip 64A can be held by a speaker S who uses the loudspeaker 60. The loudspeaker 60 includes a main body horn 64B. The main body horn 64B has an opening so as to improve the directionality of the sound V output from the main body speaker 63. The main body grip 64A and the main body horn 64B are formed on the main body case 64.

[0115] The voice transmitting device 50 may be attached to the main body horn part 64B which is the loudspeaker part of the loudspeaker 60. In this embodiment, the voice acquiring means 20A, the voice converting means 20B, and the position acquiring means 20C are modularized as a module that can be attached to the loudspeaker part of the loudspeaker 60. Furthermore, the voice acquiring means 20A, the voice converting means 20B, the position acquiring means 20C, and the voice communication part 26 may be modularized as a module that can be attached to the loudspeaker part of the loudspeaker 60. The voice acquiring means 20A receives the voice emitted from the loudspeaker part of the loudspeaker 60 and acquires the voice V. The voice transmitting device 50 has an attachment part 50X. The attachment part 50X has, for example, a clip. The clip of the attachment part 50X clamps the edge of the main body horn part 64B, so that the voice transmitting device 50 is attached to the loudspeaker 60. The attachment portion 50X may have an adhesive portion instead of a clip, so long as the sound transmitting device 50 can be attached to the main body horn portion 64B.

[0116] 1 and 13, the voice transmitting device 50 of this embodiment has a microphone unit 21. The voice transmitting device 50 of this embodiment omits the amplifier unit 22 and the speaker unit 23. The voice acquiring means 20A of this embodiment has only the microphone unit 21. The microphone unit 21 is configured to be able to acquire the voice V emitted from the main speaker unit 63 of the loudspeaker 60.

[0117] <Effects of the embodiment> The effects of this embodiment will be described. (3) The audio transmission system 10 can be configured by retrofitting the audio transmitting device 50 to an existing loudspeaker 60. In this way, the audio transmission system 10 can be configured while utilizing the existing loudspeaker 60. The loudspeaker 60 is not limited to a transistor megaphone, and may be equipment such as broadcasting equipment, a radio cassette recorder, or a CD player, so that the audio transmission system 10 can be configured by combining multiple types of loudspeaker 60.

[0118] <Modification> The above-mentioned embodiments are examples of forms that the voice transmission system, the voice transmission device, and the server may take, and are not intended to limit the forms. The voice transmission system, the voice transmission device, and the server may take forms different from those exemplified in the above-mentioned embodiments. Examples of such forms include forms in which part of the configuration of each embodiment is replaced, changed, or omitted, or forms in which new configurations are added to each embodiment. Modified examples of each embodiment are shown below.

[0119] 14, the voice transmitting device 20 may be configured such that the microphone unit 21 and the speaker unit 23 are provided separately from a main body 70 having an amplifier unit 22. The main body 70 is provided with a handle or the like so that the speaker S can hold and carry it. The microphone unit 21 and the speaker unit 23 are each connected to the main body 70 by wire or wirelessly. Note that the configuration may be such that either the microphone unit 21 or the speaker unit 23 is housed in the main body 70 together with the amplifier unit 22, and only the other is separately connected to the main body 70 by wire or wirelessly.

[0120] When the server 30 receives the voice data VD from the voice transmitting device 20, the server control unit 32 may generate the amplification time T from the time when the server 30 received the voice data VD. In this modification, the transmission of the amplification time data TD from the voice transmitting device 20 to the server 30 may be omitted.

[0121] The amplification position data PD may be identification information of the sound transmitting device 20. The identification information is, for example, a number assigned to each of the multiple sound transmitting devices 20. The server 30 stores the identification information of the sound transmitting device 20 located at each of the multiple specific positions SP.

[0122] The server 30 may transmit all of the audio data VD corresponding to the text data ED when transmitting the text data ED to the user terminal 80. In this modification, when a portion of the text data ED is selected by the user U, the user terminal 80 may be configured to play back the audio data VD from a predetermined portion of the audio data VD that is related to the portion of the text data ED.

[0123] The current location of the user U may be acquired by reading a QR code (registered trademark) with the user terminal 80. The QR code (registered trademark) is placed, for example, in a location in the facility 1 that corresponds to the specific location SP. By acquiring the current location of the user U with the QR code (registered trademark), even if the user terminal 80 cannot identify the current location of the user U, it is possible to acquire the voice data VD at the current location of the user U.

[0124] In the third embodiment, the sound transmitting device 20 may be placed near the loudspeaker 60 without being attached to the loudspeaker 60. The sound transmitting device 20 is placed, for example, at a position where the sound V amplified by the loudspeaker 60 can be acquired.

[0125] The means for identifying the specific audio part SAP may be realized by artificial intelligence. For example, the server control unit 32 may have an artificial intelligence unit. The artificial intelligence unit determines the importance of the audio data VD based on words that tend to be included frequently in audio data VD that is played frequently by the user U. The server control unit 32 may determine a part that the artificial intelligence unit determines to have low importance as the specific audio part SAP.

[0126] It will be obvious to those skilled in the art that the above first, second and third embodiments and the modified examples may be appropriately combined. [Explanation of symbols]

[0127] 10...voice transmission system, 20, 50...voice transmission device, 20X, 60...loudspeaker equipment, 20A...voice acquisition means, 20B...voice conversion means, 20C...position acquisition means, 24A...holding unit, 30...server, 35...text data generation means, 40...mobile communication terminal, 80...user terminal.

Claims

1. A voice transmitting device that transmits a voice of a portable loudspeaker that amplifies a speaker's voice to the surroundings, comprising: A voice acquisition means for acquiring the voice during amplified speech; a voice conversion means for converting the voice acquired by the voice acquisition means into voice data; a position acquisition means for acquiring loudspeaker position data indicating a position of the loudspeaker during loudspeaker operation, Transmitting the voice data and the loudspeaker position data to a server; In the server, the voice data is associated with the loudspeaker position data, and the voice data is stored so as to be able to be provided to an external user terminal in response to a request from the user terminal.

2. 2. The voice transmitting device according to claim 1, wherein the loudspeaker is a megaphone having a grip that can be held by a speaker.

3. the voice acquisition means is a microphone that receives the voice of the speaker of the loudspeaker; 2. The voice transmitting device according to claim 1, wherein the voice converting means and the position acquiring means are built into the loudspeaker.

4. the voice acquisition means, the voice conversion means, and the position acquisition means are modularized as a module that can be attached to a loudspeaker unit of the loudspeaker equipment, The voice transmitting device according to claim 1 , wherein the voice acquiring means acquires the voice by receiving a voice emitted from the loudspeaker unit.

5. 1. An audio transmission system, comprising: A voice transmission device according to any one of claims 1 to 4, The server, The server, extracting the voice data associated with the loudspeaker position data corresponding to the position information based on a request including position information indicating a specific position transmitted from the user terminal; A voice transmission system that transmits the extracted voice data to the user terminal.

6. 1. A voice transmission system for transmitting a voice of a portable loudspeaker that loudspeaks a speaker's voice to the surroundings, comprising: a voice transmitting device including a voice acquiring means for acquiring the voice during amplified speech, and a voice converting means for converting the voice acquired by the voice acquiring means into voice data; a mobile communication terminal connected to the voice transmitting device via short-distance communication and having a position acquisition means for acquiring position data of the mobile communication terminal; The mobile communication terminal includes: receiving the voice data from the voice transmitting device through the short-range communication; A voice transmission system that transmits the voice data and the position data to a server.

7. A server that provides voice data to a user terminal of a user based on a request from the user, receiving, via a network, from a portable loudspeaker device that loudspeaks the speaker's voice to the surroundings, the voice data relating to the voice during loudspeaking and loudspeaker position data indicating a position of the loudspeaker device; storing the voice data in association with a specific position identified based on the loudspeaker position data; A server that transmits to the user terminal the voice data linked to a specific location corresponding to the location information based on the location information included in the request from the user terminal.

8. the request from the user terminal includes the location information indicating a current location of the user acquired by the user terminal; The server according to claim 7 , further comprising: a server configured to transmit, in response to the request from the user terminal, the voice data associated with a specific location corresponding to the current location of the user to the user terminal.

9. the request from the user terminal includes the location information indicating a desired location input by the user; The server according to claim 7 , further comprising: a server configured to transmit, in response to the request from the user terminal, the voice data associated with a specific position corresponding to the desired position of the user to the user terminal.

10. storing the voice data in association with a time when the voice on which the voice data is based was amplified; 8. The server according to claim 7, wherein when the server stores predetermined voice data among the voice data, the server is configured to delete the predetermined voice data when a predetermined period of time has elapsed from the amplified time of the predetermined voice data.

11. storing the audio data after deleting a particular audio portion of the audio data; The server according to claim 7, wherein the specific audio portion is a portion of the audio data that includes a specific word.

12. a text data generating unit for generating text data from the voice data, storing the voice data and text data generated from the voice data in a linked manner; A server as described in claim 7, which transmits text data linked to the voice data to the user terminal in addition to or instead of the voice data linked to a specific location corresponding to the location information based on the location information included in the request from the user terminal.

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