Voice call system

Abstract

The objective is to transmit clearer audio to the recipient of a call compared to simply transmitting the collected audio directly to the recipient, when collecting speech using intraear sound. [Solution] The voice call system comprises a text conversion unit that converts an in-ear sound signal, which includes the speech of a speaker wearing a headset, into text, collected by an in-ear microphone mounted on the headset; an audio data conversion unit that converts the text into audio data in the language spoken by the speaker using predetermined speech synthesis data; and a call endpoint that transmits the audio data to the recipient of the call.

Description

Technical Field

[0001] The present invention relates to a voice call system.

Background Art

[0002] Patent Document 1 describes that "The communication terminal device according to the present embodiment is a communication terminal 1 capable of communicating with a voice terminal 2 via a telephone network, and includes an input unit 11 for inputting text data, a voice synthesis engine unit 13 for converting the text data into a voice signal by voice synthesis, a communication interface 15 for transmitting the voice signal to the voice terminal 2 and receiving a voice signal from the voice terminal 2, a voice recognition engine unit 14 for converting the voice signal from the voice terminal 2 into text data by voice recognition, and a display unit 12 for displaying the converted text data."

[0003] Patent Document 2 describes that "The voice input / output device 200 which is a headset, earphone or headset has an internal microphone 201 as a main voice acquisition unit, an external microphone 202 as a noise acquisition unit, a speaker 203 as a voice output unit, and a voice processing unit 290. The voice processing unit 290 has a noise cancellation unit 204 and an echo cancellation unit 205. The internal microphone 201 captures a mixed voice in which external noise, output voice 231 and main voice are mixed, and outputs a mixed voice signal 212. The external microphone 202 is arranged facing the outside of the user 270's body, and the external microphone 202 captures external noise coming from outside the user. The received received signal 240 by the communication unit 260 is converted into an output voice signal 232 and input to the speaker 203."

[0004] Patent Document 3 states, "A microphone 31 is provided inside the housing 27 to detect the sound pressure signal output from the speaker 8 and convert it into an electrical signal c. A subtraction circuit 34 is inserted into the signal path of the transmitted signal a3, which is output from the vibration pickup 7 and amplified, to subtract the electrical signal c output by the microphone 31 from the transmitted signal a3. In addition, an equalizer circuit 32 is inserted into the signal path from the electrical signal c output by the microphone 31 to the subtraction circuit 34 to correct the frequency characteristics of the electrical signal output by the microphone 31 to the frequency characteristics of the transmitted signal a3, which is output from the vibration pickup 7 and amplified."

[0005] Patent Document 4 states that "The application service provision system and method using a noise-shielding earset according to the present invention includes a wireless earset including a left earphone including a left speaker driver unit, a left microphone, and a left wireless communication module, and a right earphone including a right speaker driver unit, a right microphone, and a right wireless communication module, and a terminal which performs processing and control of acoustic signals and voice signals for the left earphone and the right earphone, respectively, and provides a service corresponding to the execution of an application, wherein the wireless earset is a noise-shielding earset, and the noise-shielding earset is characterized in that the back holes of the left speaker driver unit and the right speaker driver unit communicate with micro-holes that shield against noise." [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2013-135334 [Patent Document 2] Japanese Patent Publication No. 2023-040244 [Patent Document 3] Japanese Patent Application Publication No. 08-340590 [Patent Document 4] Special Publication No. 2022-506788 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] In headsets used for phone calls, clear communication is highly desirable. However, a system has not yet been established that can adequately suppress ambient noise, wind noise, and microphone noise caused by body movement under all conditions, while still transmitting clear voice to the other party.

[0008] For example, even when using multiple microphones and beamforming technology to capture speech, wind noise and ambient noise will still be picked up. Furthermore, even when applying algorithms to reduce ambient noise, in some situations, the speech itself may be reduced in the same way as the noise, making it difficult to hear. Methods that are robust against noise include capturing speech using intraear sound or contact pickup, but the sound remains muffled, and even with signal processing, it is still difficult to hear. Moreover, it is impossible to avoid the capture of noise such as body movements.

[0009] This disclosure is made in view of these circumstances and aims to provide a voice call system that can transmit clearer audio to the recipient compared to a system that collects spoken audio as intraear sound and transmits the collected audio directly to the recipient. [Means for solving the problem]

[0010] A voice call system according to a first aspect of this disclosure includes: a text conversion unit that converts intraear sound, including the speech of a wearer wearing a headset, collected by an intraear microphone mounted on the headset, into text; a voice data conversion unit that converts the text into voice data in the same language spoken by the wearer using predetermined speech synthesis data; and a call endpoint that transmits the voice data to the recipient of the call.

[0011] A voice call system according to a second aspect of this disclosure, in a voice call system according to a first aspect, the voice data conversion unit converts the text into voice data using the speech synthesis data generated from the wearer's spoken voice.

[0012] A voice call system according to a third aspect of this disclosure further comprises a speaker identification unit that identifies the speaker based on at least one of the wearer's spoken voice and the text, in addition to the voice call system according to the second aspect.

[0013] A voice call system according to a fourth aspect of this disclosure further comprises a text display unit for displaying the text on a screen, in a voice call system according to any one of the first to third aspects.

[0014] A voice call system according to a fifth aspect of this disclosure, in a voice call system according to a fourth aspect, wherein the text conversion unit converts the voice of the call recipient, including the utterance of the call recipient, into text, and displays the text on the screen so that the utterance of the wearer and the utterance of the call recipient can be identified.

[0015] A voice call system according to the sixth aspect of this disclosure is a voice call system according to any one of the first to fifth aspects, further comprising a sidetone unit that generates a sidetone that adjusts external sounds, including the wearer's spoken voice, collected by an external microphone mounted on the headset, and feeds them back to the wearer.

[0016] A voice call system according to the seventh aspect of this disclosure further comprises a cancellation unit that cancels the utterance of the call recipient and the sidetone from the in-ear sound, in addition to the voice call system according to the sixth aspect.

[0017] The voice call system according to the eighth aspect of this disclosure further comprises a bypass unit that bypasses a functional unit for automatically controlling the signal level of the in-ear voice, in a voice call system according to any one of the first to seventh aspects.

[0018] In the voice call system according to the ninth aspect of the present disclosure, in the voice call system according to the eighth aspect, the bypass unit bypasses the functional unit in a first mode in which the text conversion unit and the voice data conversion unit are activated, and does not bypass the functional unit in a second mode in which the text conversion unit and the voice data conversion unit are deactivated.

[0019] The voice call system according to the tenth aspect of the present disclosure is the voice call system according to any one of the first to ninth aspects, further comprising a detection unit that detects a predetermined operation by the wearer based on the in-ear voice, and a remote control unit that outputs a remote control signal for controlling a control target according to the operation.

[0020] The voice call system according to the eleventh aspect of the present disclosure is the voice call system according to the tenth aspect, wherein the control target includes a voice assistant, and the remote control signal includes a wake-up command for starting a service for the voice assistant.

[0021] The voice call system according to the twelfth aspect of the present disclosure is the voice call system according to any one of the first to eleventh aspects, including the headset and a terminal device communicably connected to the headset, and the call endpoint is provided in the terminal device.

[0022] The voice call system according to the thirteenth aspect of the present disclosure is the voice call system according to the twelfth aspect, wherein the text conversion unit and the voice data conversion unit are provided in the terminal device.

[0023] The voice call system according to the fourteenth aspect of the present disclosure is the voice call system according to the twelfth aspect, wherein the text conversion unit is provided in the headset and the voice data conversion unit is provided in the terminal device.

[0024] The voice call system according to the 15th aspect of the present disclosure is the voice call system according to the 12th aspect, wherein the text conversion unit and the voice data conversion unit are provided in the headset.

Advantages of the Invention

[0025] According to the voice call system according to the present disclosure, when collecting the uttered voice as in-ear sound, a clearer voice can be transmitted to the call destination as compared with the case of directly transmitting the voice collected as in-ear sound to the call destination.

Brief Description of the Drawings

[0026] [Figure 1] It is a diagram showing an example of the schematic configuration of the voice call system 10 according to the present embodiment. [Figure 2] It is a diagram showing an example of the internal structure of the headset 100 according to the present embodiment. [Figure 3] It is a diagram showing an example of the functional configuration of the voice call system 10 according to the present embodiment. [Figure 4] It is a diagram showing an example of the functional configuration of the conventional voice call system 10'.

Modes for Carrying Out the Invention

[0027] Hereinafter, an example of an embodiment of the present disclosure will be described with reference to the drawings. In each drawing, the same or equivalent components and parts are given the same reference numerals. Also, the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may be different from the actual ratios.

[0028] Prior to the description of the voice call system 10 according to the present embodiment, the conventional voice call system 10' will be described. FIG. 4 is a diagram showing an example of the functional configuration of the conventional voice call system 10'. The conventional voice call system 10' includes a headset 100' and a terminal device 500' communicably connected to the headset 100'.

[0029] Headset 100' is a general-purpose earphone for phone calls. Common types of earphones for phone calls include in-ear earphones, bone conduction earphones, and over-ear earphones. Headset 100' comprises an external microphone 110', a driver 120', a sidetone unit 130', a cancellation unit 140', an automatic gain control unit 150', a communication endpoint 160', and a remote control unit 170'.

[0030] The external microphone 110' is a microphone positioned outside the ear that collects the wearer's speech, as well as external sounds including the speech of others and other noises transmitted from outside the ear.

[0031] Driver 120' is a speaker that outputs audio, including the audio and sidetone received from the other party (also called the "Far side").

[0032] The sidetone unit 130' generates a sidetone that adjusts the wearer's speech voice transmitted from outside the ear, as well as external sounds including the speech voices of others and other noises, and provides feedback to the wearer.

[0033] The cancellation unit 140' cancels the voice output from the call recipient via the driver 120' from the microphone audio, reducing echoes where the call recipient's voice is returned to the call recipient.

[0034] The automatic gain control unit 150' adjusts the volume of the call audio to an appropriate level.

[0035] The communication endpoint 160' communicates with the terminal device 500', for example, via Bluetooth®.

[0036] The remote control unit 170' performs actions such as starting or ending a call in response to the input operation.

[0037] Terminal device 500' is a device capable of making calls to the recipient. Examples of terminal device 500' include smartphones, tablet devices, and laptop computers. Terminal device 500' comprises a communication endpoint 510' and a call endpoint 520'.

[0038] The communication endpoint 510' communicates with the headset 100', for example, via Bluetooth.

[0039] The call endpoint 520' makes the call to the recipient.

[0040] When making calls using open-type earphones, as in conventional voice call systems 10', the system picks up voices from people other than the wearer wearing the headset 100'. To avoid picking up wind noise and ambient noise, a boom-type microphone structure with the microphone positioned near the mouth is being considered. However, a boom-type microphone structure imposes significant constraints on the shape of the product, making it difficult to implement in currently widely used small, truly wireless earphones.

[0041] Therefore, one might consider making calls using the in-ear microphone of a sealed earphone. However, when making calls using the in-ear microphone of a sealed earphone, while outside sounds are blocked, the wearer's speech, which has traveled through the head, is collected in the closed ear canal, which can result in sound degradation such as muffled audio.

[0042] The voice call system 10 according to this embodiment was developed in view of these circumstances, and aims to transmit clearer audio to the recipient of the call compared to the case where the audio collected by the ear is transmitted directly to the recipient of the call.

[0043] Figure 1 shows an example of a schematic configuration of the voice call system 10 according to this embodiment. The voice call system 10 according to this embodiment includes a headset 100 and a terminal device 500 that is communicatively connected to the headset 100. The headset 100 is a closed-type earphone, different from the headset 100'. The terminal device 500 is a device that can communicate with the recipient, similar to the terminal device 500'.

[0044] In this figure, the headset 100 is shown as an example of a canal-type, truly wireless earphone. Also, in this figure, the terminal device 500 is shown as an example of a smartphone. The terminal device 500 may be connected to the headset 100 via a short-range wireless communication standard such as Bluetooth.

[0045] Figure 2 shows an example of the internal structure of the headset 100 according to this embodiment. In addition to the external microphone 110 and the driver 120, the headset 100 further includes an internal microphone 210.

[0046] Canal-type earphones are used by inserting an ear tip (also called an earpiece, ear pad, or ear cap) 300, made of an elastic material such as silicone rubber, into the ear canal, and fixing it to the outer circumference of the tip that is inserted into the ear canal, deep into the ear like an earplug. This forms an internal space (also called the "in-ear space") connected to the inner ear and the external ear canal, and an external space (also called the "out-ear space") which is theoretically separated from the internal space. The out-of-ear microphone 110 may be placed in the out-of-ear space, and the in-ear microphone 210 may be placed in the internal space. In this embodiment, the voice communication system 10 uses the in-ear microphone 210, which is placed inside the ear in this way, as a microphone for collecting spoken voice.

[0047] Figure 3 shows an example of the functional configuration of the voice call system 10 according to this embodiment. The headset 100 includes an external microphone 110, a driver 120, a sidetone unit 130, a cancellation unit 140, an automatic gain control unit 150, a communication endpoint 160, and a remote control unit 170, in addition to an internal microphone 210, a bypass unit 220, and a detection unit 230. The section from the external microphone 110 to the remote control unit 170 corresponds to the section from the external microphone 110' to the remote control unit 170' in a conventional headset 100'.

[0048] The external microphone 110 is a microphone positioned outside the ear that collects the wearer's speech, as well as external sounds including the speech of others and other noises transmitted from outside the ear.

[0049] Driver 120 is a speaker that outputs audio, including the audio received from the other party in the call and the sidetone.

[0050] The sidetone unit 130 collects the wearer's speech voice transmitted from outside the ear, as well as external sounds including the speech voices of others and other noises, using the external microphone 110, adjusts them, and generates a sidetone that is fed back to the wearer.

[0051] The cancellation unit 140 cancels out the spoken voice and sidetone of the person on the other end of the call from the in-ear sound. As a result, the cancellation unit 140 reduces input other than the wearer's spoken voice to the text conversion unit 610, which will be described later.

[0052] The automatic gain control unit 150 adjusts the volume of the call audio to an appropriate level. In other words, the automatic gain control unit 150 is a functional unit that automatically controls the signal level of the in-ear audio. As will be described later, in this embodiment, this functional unit can be bypassed.

[0053] The communication endpoint 160 communicates with the terminal device 500, for example, via Bluetooth.

[0054] The remote control unit 170 outputs a remote control signal to control the controlled object in accordance with the operation detected by the detection unit 230, which will be described later.

[0055] The in-ear microphone 210 is a microphone placed inside the ear that collects in-ear sounds, including the wearer's speech.

[0056] The bypass unit 220 bypasses a function unit that automatically controls the signal level of intra-ear sound. More specifically, the bypass unit 220 bypasses the function unit in the first mode, which activates the text conversion unit 610 and the voice data conversion unit 630 described later, and does not bypass the function unit in the second mode, which deactivates the text conversion unit 610 and the voice data conversion unit 630.

[0057] Here, the automatic gain control unit 150 is a functional unit provided for conventional voice processing for phone calls. However, it has been found that this processing reduces the accuracy of speech recognition in the text conversion unit 610, which will be described later. Therefore, in this embodiment, the bypass unit 220 can bypass the automatic gain control unit 150 when performing text conversion and speech conversion.

[0058] The detection unit 230 detects predetermined actions performed by the wearer based on in-ear sound. The remote control unit 170 then outputs a remote control signal to control the controlled object in response to the action. This enables control such as starting and ending calls.

[0059] The controlled object may also include a voice assistant. In this case, the remote control signal may include a wake-up command to start the voice assistant's service.

[0060] Examples of predetermined actions include clearing one's throat and moving the jaw up and down. For example, by pre-registering the sound of the wearer clearing their throat, the remote control unit 170 may output a wake-up command when the detection unit 230 detects a throat clearing. Alternatively, by pre-registering the pressure fluctuations in the ear canal when the wearer moves their jaw up and down, the remote control unit 170 may output a control command when the detection unit 230 detects the jaw moving up and down. In this case, the wearer can end a call by, for example, clearing their throat twice and then moving their jaw up and down three times.

[0061] Conventionally, there is a known technology that allows remote control by speaking pre-registered words. However, this is difficult to use in environments where there are other people around, such as on a train. There is also a known technology that allows remote control by tapping an earphone, but this cannot be used when hands are occupied or when wearing equipment that covers the ears, such as a helmet. In contrast, this embodiment makes it possible to perform remote control without being noticed by others, and even when hands are occupied or when wearing equipment that covers the ears.

[0062] The terminal device 500 includes a communication endpoint 510 and a call endpoint 520, as well as a text conversion unit 610, a speaker identification unit 620, a voice data conversion unit 630, and a text display unit 640.

[0063] The communication endpoint 510 communicates with the headset 100, for example, via Bluetooth.

[0064] The call endpoint 520 conducts a call with the recipient. In this embodiment, the call endpoint 520 does not send the collected audio data directly to the recipient, but rather, as described later, it sends the audio data to the recipient after it has been converted to text and then back to audio.

[0065] The text conversion unit 610 converts the in-ear sound, including the speech of the wearer wearing the headset 100, which is collected by the in-ear microphone 210 mounted on the headset 100, into text. In this process, the text conversion unit 610 may use technologies such as STT (Speech To Text).

[0066] The text conversion unit 610 may perform text conversion processing using the internal STT engine of the terminal device 500. Alternatively, the text conversion unit 610 may access an external STT engine provided as an external service and perform text conversion processing. In this case, the terminal device 500 may, for example, if the external service is unavailable for any reason, control the text conversion unit 610 and the voice data conversion unit 630 to be inactive and notify the headset 100 of an instruction to switch from the first mode to the second mode.

[0067] In the above explanation, we showed a case where the text conversion unit 610 converts only the spoken voice of the wearer of the headset 100 into text. However, the text conversion unit 610 may also convert the spoken voice of the call recipient received via the call endpoint 520 into text.

[0068] The speaker identification unit 620 identifies the speaker based on at least one of the wearer's spoken voice and / or text. When identifying the speaker based on the wearer's spoken voice, the speaker identification unit 620 may, for example, identify the speaker by identifying a voiceprint. When identifying the speaker based on the converted text, the speaker identification unit 620 may, for example, identify the speaker by the first-person pronoun and word choice contained in the text.

[0069] The voice data conversion unit 630 converts text into voice data in the language spoken by the wearer using predetermined speech synthesis data. In other words, the voice data conversion unit 630 converts text into voice data in the language spoken without translation processing. In this case, the voice data conversion unit 630 may use technologies such as TTS (Text To Speech).

[0070] The voice data conversion unit 630 may perform voice data conversion using the internal TTS engine of the terminal device 500. Alternatively, the voice data conversion unit 630 may access an external TTS engine provided as an external service to perform voice data conversion processing. In this case, if the external service is unavailable for any reason, the terminal device 500 may deactivate the text conversion unit 610 and the voice data conversion unit 630 and notify the headset 100 of an instruction to switch from the first mode to the second mode.

[0071] When performing the voice data conversion process, if the speaker can be identified, the voice data conversion unit 630 may convert the text into voice data using speech synthesis data generated from the wearer's speech. This allows the voice data conversion unit 630 to convert the text back into voice data while retaining the wearer's own voice. However, it is not limited to this. The voice data conversion unit 630 may also convert the text into voice data using speech synthesis data generated from the speech of any speaker. This allows the voice data conversion unit 630 to function as a voice avatar.

[0072] The text display unit 640 displays the converted text on the screen. Conventionally, it has been difficult to know how spoken content sounds to the other party during a call. Although some feedback of the spoken voice is provided by sidetone, it is sometimes insufficient. This problem is particularly noticeable during calls in noisy environments. In contrast, according to this embodiment, by displaying the text conversion result as text on the screen of the terminal device 500, the speaker wearing the headset 100 can understand what is being conveyed to the other party. As a result, the wearer can make a call while checking the call quality in real time.

[0073] Furthermore, if the text conversion unit 610 converts both the wearer's speech and the other party's speech into text, the text display unit 640 may display both the text converted from the wearer's speech and the text converted from the other party's speech on the screen. In this case, the text display unit 640 may display the text on the screen in a way that makes it possible to distinguish between the wearer's speech and the other party's speech, such as by adding an identifier to identify which speaker produced the text or by changing the color of the text.

[0074] Thus, the voice call system 10 according to this embodiment employs an approach that converts in-ear sound into text using STT or the like, and then converts it back into speech using TTS or the like. As a result, the voice call system 10 according to this embodiment can reduce the transmission of sounds other than conversation as part of the call audio to the other party. Therefore, the voice call system 10 according to this embodiment can transmit clear audio to the other party with ambient noise, wind noise, and body movement noise reduced. In this case, the voice call system 10 according to this embodiment uses an in-ear microphone 210 mounted on a sealed earphone or the like, so ambient sound does not reach the text conversion engine in principle, thus reducing the transmission of ambient sound as part of the call audio to the other party to an almost negligible extent.

[0075] Although we have described one possible implementation form as an example, the technology according to this embodiment can be modified or applied in various ways.

[0076] For example, the above description uses the case where the text conversion unit 610 and the voice data conversion unit 630 are provided in the terminal device 500 as an example, but it is not limited to this.

[0077] The text conversion unit 610 may be provided in the headset 100, and the voice data conversion unit 630 may be provided in the terminal device 500. In this case, the data exchanged in communication between the headset 100 and the terminal device 500 will be text data, which reduces the amount of data compared to exchanging voice data. Therefore, for example, in communication that allows collisions using frequency hopping, such as Bluetooth, the probability of collisions can be reduced.

[0078] Furthermore, the text conversion unit 610 and the voice data conversion unit 630 may be provided in the headset 100. This allows processing to be completed within the headset 100 without relying on processing by the terminal device 500. In this case, the voice call system 10 may include only the headset 100 and not the terminal device 500. That is, the term "system" in the voice call system 10 may be interpreted as a concept that also includes those composed of a single device such as earphones.

[0079] Furthermore, while the above description uses two-way communication as an example, it is not limited to this. The voice communication system 10 according to this embodiment can also be used for conversations involving multiple people. Therefore, by participating in a web conference using the voice communication system 10 according to this embodiment, it is possible to improve the quality of the conference conversation and also save the converted text as meeting minutes.

[0080] Furthermore, it goes without saying that this disclosure can be implemented in various modified forms, as long as they do not deviate from its intended purpose. [Explanation of Symbols]

[0081] 10. Voice Call System 100 Headsets 110 Out-of-ear microphone 120 Drivers 130 Side tone section 140 Cancellation Section 150 Automatic Gain Control Section 160 Communication endpoint (headset 100 side) 170 Remote Control Unit 210 In-ear microphone 220 Bypass section 230 Detection unit 300 ear tips 500 terminal devices 510 Communication endpoint (terminal device 500 side) 520 Call Endpoints 610 Text Conversion Unit 620 Speaker Identification Section 630 Audio Data Conversion Unit 640 Text display section

Claims

1. A text conversion unit that converts the in-ear sound, including the speech of the wearer wearing the headset, collected by an in-ear microphone mounted on the headset, into text, A voice data conversion unit that uses predetermined speech synthesis data to convert the text into voice data in the same language spoken by the wearer, A call endpoint that transmits the aforementioned voice data to the recipient of the call, Voice call system.

2. The voice data conversion unit converts the text into voice data using the speech synthesis data generated from the wearer's speech. The voice communication system according to claim 1.

3. The system further includes a speaker identification unit that identifies the speaker based on at least one of the wearer's spoken voice and the text. The voice call system according to claim 2.

4. The system further includes a text display unit that displays the aforementioned text on a screen. The voice communication system according to claim 1.

5. The text conversion unit converts the audio from the call destination, including the utterances of the call destination, into text. The text is displayed on the screen so that the voice of the wearer and the voice of the person on the other end of the call can be identified. The voice communication system according to claim 4.

6. The headset further includes a sidetone unit that generates a sidetone that adjusts external sounds, including the wearer's speech, collected by an external microphone mounted on the headset, and feeds them back to the wearer. The voice communication system according to claim 1.

7. The system further includes a cancellation unit that cancels out the spoken voice of the caller and the sidetone from the in-ear sound. The voice call system according to claim 6.

8. The system further includes a bypass unit that bypasses the function unit that automatically controls the signal level of the intra-ear sound. The voice communication system according to claim 1.

9. The bypass unit bypasses the functional unit in the first mode, which activates the text conversion unit and the voice data conversion unit, and does not bypass the functional unit in the second mode, which deactivates the text conversion unit and the voice data conversion unit. The voice communication system according to claim 8.

10. A detection unit that detects a predetermined action performed by the wearer based on the in-ear sound, The system further includes a remote control unit that outputs a remote control signal to control a controlled object in accordance with the aforementioned operation. The voice communication system according to claim 1.

11. The controlled object includes a voice assistant, and the remote control signal includes a wake-up command to initiate the voice assistant's service. The voice call system according to claim 10.

12. The headset and a terminal device that is communicatively connected to the headset are included. The aforementioned call endpoint is provided in the terminal device. A voice communication system according to any one of claims 1 to 11.

13. The text conversion unit and the voice data conversion unit are provided in the terminal device. The voice communication system according to claim 12.

14. The text conversion unit is provided in the headset, and the voice data conversion unit is provided in the terminal device. The voice communication system according to claim 12.

15. The text conversion unit and the voice data conversion unit are provided in the headset. The voice communication system according to claim 12.

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