CN110708615A - Intercommunication system and intercommunication method realized based on TWS earphone - Google Patents

Intercommunication system and intercommunication method realized based on TWS earphone Download PDF

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Publication number
CN110708615A
CN110708615A CN201910808578.2A CN201910808578A CN110708615A CN 110708615 A CN110708615 A CN 110708615A CN 201910808578 A CN201910808578 A CN 201910808578A CN 110708615 A CN110708615 A CN 110708615A
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earphone
module
audio
sending
target
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杨兴旺
包金涛
陈宝娃
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GUANGZHOU I-SPK ELECTRONIC TECHNOLOGY Co Ltd
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GUANGZHOU I-SPK ELECTRONIC TECHNOLOGY Co Ltd
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Priority to CN201910808578.2A priority Critical patent/CN110708615A/en
Publication of CN110708615A publication Critical patent/CN110708615A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q5/00Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/24Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/60Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041Portable telephones adapted for handsfree use
    • H04M1/6058Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H04M1/6066Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)

Abstract

The invention discloses an intercom system and an intercom method realized based on TWS earphones, the system comprises a mobile terminal and the TWS earphones, the TWS earphones comprise a left earphone and a right earphone, the left earphone and the right earphone are respectively provided with a first Bluetooth module, a loudspeaker, a microphone and a key, the mobile terminal is provided with a wireless communication module, an intercom object setting module, a noise reduction module and a main control module, and the wireless communication module comprises a second Bluetooth module. The method comprises the following steps: 1) the TWS earphone is connected with the mobile terminal through Bluetooth; 2) setting a target earphone through a talkback object setting module; 3) pressing a key, and sending recording request information to the mobile terminal; 4) a main control module of the mobile terminal determines to send the earphone; 5) recording by a microphone to obtain a first audio frequency; 6) the noise reduction module performs noise reduction processing on the first audio to obtain a second audio; 7) the target earpiece plays the first audio and the second audio. The invention can reduce the cost of talkback and improve the quality of talkback.

Description

Intercommunication system and intercommunication method realized based on TWS earphone
Technical Field
The invention relates to the technical field of communication, in particular to an intercom system and an intercom method based on a TWS earphone.
Background
At home, we often encounter such a scenario: two people are busy in different rooms or regions simultaneously, for example one person is working in the study, another person is watching TV in the living room, at this time, if one party finds another party to have something, often need go to other room or region and communicate on the spot, if one party of something is inconvenient to get up, often can improve the volume and call with the other party, but this kind of communication mode is not only very arduous, and can be intermittent, it is not very clear to listen, an instrument of talkbacking is urgently needed at this time to realize the communication function of talkbacking between bedroom and living room, the kitchen.
At present, the user usually makes a call directly or talkbacks through an interphone. However, not only the communication cost of an operator needs to be paid, but also a new talkback mode is urgently needed because a mobile phone cannot be placed at any time when people are busy in a kitchen or a living room, and a talkback is heavy when people directly take an interphone for talkback, and the interphone is not convenient to carry.
To solve the problem, a middle-distance intercom communication method and device of bluetooth headsets (patent number: 201510790479.8) are proposed, two bluetooth headsets are connected with a mobile terminal in a bluetooth manner to realize an intercom function, but the technical scheme has the following defects: 1) the talkback function is realized based on the two Bluetooth earphones, so that the talkback cost is high; 2) ordinary bluetooth headset does not possess the initiative and falls the function of making an uproar, receives the noise influence easily and can't hear the conversation content clearly, leads to talkback conversation quality poor, makes the user experience poor.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an intercom system and an intercom method based on a TWS headset, which can reduce the cost of intercom, improve the quality of intercom, and provide users with good experience.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an intercom system based on TWS earphone realization, includes mobile terminal and TWS earphone, the TWS earphone includes left earphone and right earphone, all be equipped with first bluetooth module, speaker, microphone on left side earphone and the right earphone and be used for controlling the button of recording switch, speaker, microphone and button all are connected with first bluetooth module electricity, be equipped with wireless communication module, object of talkbacking in the mobile terminal and set up the module, fall the module and the host system of making an uproar, wireless communication module, object of talkbacking set up the module and fall the module of making an uproar and all be connected with the host system electricity, wireless communication module includes second bluetooth module, left side earphone and right earphone all are connected with the mobile terminal bluetooth through the cooperation of first bluetooth module and second bluetooth module.
Preferably, the wireless communication module further comprises a mobile network module or/and a WiFi module.
As a preferred scheme, the intercom system implemented based on the TWS headset further comprises a server, the mobile terminal is in communication connection with the server through a wireless communication module, and the server comprises a voice recognition module, a translation module and a voice synthesis module.
As a preferable scheme, the mobile terminal further includes a translation language setting module, and the translation module selects a translation target language through the translation language setting module.
An intercom method based on the above intercom system implemented based on TWS headset, the intercom method comprising the steps of:
1) the TWS earphone is connected with the mobile terminal through Bluetooth;
2) setting a left earphone/a right earphone as a target earphone through an talkback object setting module to obtain target information;
3) pressing a left earphone/right earphone button, and sending recording request information to the mobile terminal by the left earphone/right earphone;
4) the main control module of the mobile terminal determines the left earphone/the right earphone as a sending earphone according to the target information obtained in the step 2) and the recording request information in the step 3);
5) the microphone of the sending earphone carries out recording to obtain a first audio frequency, and the first audio frequency is sent to the noise reduction module;
6) the noise reduction module carries out noise reduction processing on the first audio to obtain a second audio;
7) the main control module sends a first audio and a second audio to corresponding target earphones according to the target information in the step 2), and the target earphones play the first audio and the second audio;
when the target earphone is a left earphone, the sending earphone is a right earphone; and when the target earphone is a right earphone, the sending earphone is a left earphone.
An intercom method based on the above intercom system implemented based on TWS headset, the intercom method comprising the steps of:
1) the TWS earphone is connected with the mobile terminal through Bluetooth;
2) setting a left earphone/a right earphone as a target earphone through an talkback object setting module to obtain target information;
3) pressing a left earphone/right earphone button, and sending recording request information to the mobile terminal by the left earphone/right earphone;
4) the main control module determines the left earphone/the right earphone as a sending earphone according to the target information obtained in the step 2) and the recording request information in the step 3);
5) the microphone of the sending earphone carries out recording to obtain a first audio frequency, and the first audio frequency is sent to the noise reduction module;
6) the noise reduction module carries out noise reduction processing on the first audio to obtain a second audio;
7) setting translation language information through a translation language setting module, and simultaneously sending the translation language information and the first audio frequency to a server through a main control module;
8) the voice recognition module carries out voice recognition on the first audio frequency to obtain a first text file;
9) the translation module selects a translation target language according to the translation language information obtained in the step 7), and translates the first character file into a target language character to obtain a second character file;
10) the voice synthesis module carries out voice synthesis on the second character file to obtain a third audio, and the server sends the third audio to the mobile terminal;
11) the main control module sends a second audio and a third audio to corresponding target earphones according to the target information in the step 2), and the target earphones play the second audio and the third audio;
when the target earphone is a left earphone, the sending earphone is a right earphone; and when the target earphone is a right earphone, the sending earphone is a left earphone.
As a preferred scheme, the recording request message includes a key value, and the key value is a left earphone key value or a right earphone key value.
As a preferred scheme, the method for determining the sending earphone by the main control module in step 4) includes the following steps:
1) the main control module judges whether the key value is a left earphone key value, if so, the step 3) is carried out, and if not, the step 2) is carried out;
2) the master control module judges whether the left earphone is a sending earphone or not according to the target information, if so, the left earphone is the sending earphone, and if not, the right earphone is switched to be the sending earphone;
3) and the master control module judges whether the right earphone is the sending earphone or not according to the target information, if so, the right earphone is the sending earphone, and if not, the left earphone is switched to be the sending earphone.
As a preferable scheme, the method for performing noise reduction processing on the first audio by the noise reduction module in step 6) includes the following steps:
1) the noise reduction module analyzes the first audio and extracts the environmental sound audio;
2) the noise reduction module generates second audio for counteracting the ambient sound audio according to the ambient sound audio obtained in the step 1).
The invention has the beneficial effects that: the talkback function can be realized through the matching of the left earphone and the right earphone of the TWS earphone and the mobile terminal, and the talkback can be realized only by the participation of the TWS earphone and the mobile terminal, so that the talkback cost can be effectively reduced; the mobile terminal is provided with the noise reduction module, so that the noise reduction processing can be realized on the conversation audio through the noise reduction module, the quality of the talkback conversation can be effectively improved, and the use experience of a user is improved; in addition, the mobile terminal can be in communication connection with the server, and the speech recognition module, the translation module and the speech synthesis module of the server can translate the contents of the talkback call while realizing the talkback call, so that the practicability is higher, the use by a user is more convenient, and convenience is brought to the user.
Drawings
FIG. 1 is an assembly structure diagram of embodiment 1 of the present invention;
FIG. 2 is a block diagram of the flow of the intercom method implemented in accordance with embodiment 1 of the present invention;
FIG. 3 is a flow chart of a method for determining a sending earphone by the main control module according to the present invention;
FIG. 4 is a flow chart of a method for denoising a first audio by a denoising module according to the present invention;
FIG. 5 is an assembly structure diagram of embodiment 2 of the present invention;
fig. 6 is a flow chart of a talkback method implemented based on embodiment 2 of the present invention.
In the figure: 1-left earphone, 2-right earphone, 3-mobile terminal, 31-wireless communication module, 32-second Bluetooth module, 33-talkback object setting module, 34-noise reduction module, 35-main control module, 36-translation language setting module, 37-mobile network module, 38-WiFi module, 4-server, 41-voice recognition module, 42-translation module, 43-voice synthesis module, 5-first Bluetooth module, 6-loudspeaker, 7-microphone and 8-key.
Detailed Description
The structural and operational principles of the present invention are explained in further detail below with reference to the accompanying drawings.
As shown in embodiment 1 in fig. 1, an intercom system implemented based on TWS headset includes a mobile terminal 3 and a TWS headset, the TWS earphone comprises a left earphone 1 and a right earphone 2, the left earphone 1 and the right earphone 2 are both provided with a first Bluetooth module 5, a loudspeaker 6, a microphone 7 and a key 8 for controlling a recording switch, the loudspeaker 6, the microphone 7 and the key 8 are all electrically connected with the first Bluetooth module 5, a wireless communication module 31, an intercom object setting module 33, a noise reduction module 34 and a main control module 35 are arranged in the mobile terminal 3, the wireless communication module 31, the talkback object setting module 33 and the noise reduction module 34 are all electrically connected with the main control module 35, the wireless communication module 31 comprises a second Bluetooth module 32, and the left earphone 1 and the right earphone 2 are connected with the mobile terminal 3 through Bluetooth by matching the first Bluetooth module 5 and the second Bluetooth module 32.
As shown in fig. 2, an intercom method based on the above-mentioned intercom system implemented based on TWS headset includes the following steps:
1) the TWS earphone is connected with the mobile terminal 3 through Bluetooth;
2) setting the left earphone 1/the right earphone 2 as a target earphone through the talkback object setting module 33 to obtain target information;
3) pressing a button 8 of the left earphone 1/the right earphone 2, and sending recording request information to the mobile terminal 3 by the left earphone 1/the right earphone 2;
4) the main control module 35 of the mobile terminal 3 determines the left earphone 1/the right earphone 2 as the sending earphone according to the target information obtained in the step 2) and the recording request information in the step 3);
5) the microphone 7 of the sending earphone carries out recording to obtain a first audio frequency, and the first audio frequency is sent to the noise reduction module 34;
6) the noise reduction module 34 performs noise reduction processing on the first audio to obtain a second audio;
7) the main control module 35 sends the first audio and the second audio to the corresponding target earphone according to the target information in the step 2), and the target earphone plays the first audio and the second audio;
when the target earphone is a left earphone 1, the sending earphone is a right earphone 2; and when the target earphone is the right earphone 2, the sending earphone is the left earphone 1.
As shown in fig. 3, the method for determining the sending earphone by the main control module 35 in step 4) includes the following steps:
1) the main control module 35 judges whether the key value is a key value of the left earphone 1, if so, the step 3) is performed, and if not, the step 2) is performed;
2) the main control module 35 judges whether the left earphone 1 is a sending earphone or not according to the target information, if so, the left earphone 1 is the sending earphone, and if not, the right earphone 2 is switched to be the sending earphone;
3) the main control module 35 determines whether the right earphone 2 is a sending earphone according to the target information, if so, the right earphone 2 is a sending earphone, and if not, the left earphone 1 is switched to be a sending earphone.
As shown in fig. 4, the method for performing noise reduction processing on the first audio by the noise reduction module 34 in step 6) includes the following steps:
1) the noise reduction module 34 analyzes the first audio to extract an environmental audio;
2) the noise reduction module 34 generates a second audio for canceling the ambient sound audio from the ambient sound audio obtained in step 1).
As shown in embodiment 2 in fig. 5, an intercom system implemented based on TWS headphones includes a mobile terminal 3, a TWS headphone and a server 4, the TWS headphone includes a left headphone 1 and a right headphone 2, the left headphone 1 and the right headphone 2 are respectively provided with a first bluetooth module 5, a speaker 6, a microphone 7 and a button 8 for controlling a recording switch, the speaker 6, the microphone 7 and the button 8 are electrically connected to the first bluetooth module 5, the mobile terminal 3 is provided with a wireless communication module 31, an intercom object setting module 33, a noise reduction module 34, a translation language setting module 36 and a main control module 35, the wireless communication module 31, the intercom object setting module 33 and the noise reduction module 34 are electrically connected to the main control module 35, the wireless communication module 31 includes a second bluetooth module 32, the left headphone 1 and the right headphone 2 are both connected to the mobile terminal 3 through the first bluetooth module 5 and the second bluetooth module 32, the server 4 comprises a speech recognition module 41, a translation module 42 and a speech synthesis module 43, the mobile terminal 3 is in communication connection with the server 4 through the wireless communication module 31, and the translation module 42 selects a translation target language through the translation language setting module 36.
Preferably, the wireless communication module 31 further includes a mobile network module 37 and a WiFi module 38, and the mobile terminal 3 can select the WiFi module 38 or the mobile network module 37 to be in communication connection with the server 4.
As shown in fig. 6, an intercom method based on the above-mentioned intercom system implemented based on TWS headset includes the following steps:
1) the TWS earphone is connected with the mobile terminal 3 through Bluetooth;
2) setting the left earphone 1/the right earphone 2 as a target earphone through the talkback object setting module 33 to obtain target information;
3) pressing a button 8 of the left earphone 1/the right earphone 2, and sending recording request information to the mobile terminal 3 by the left earphone 1/the right earphone 2;
4) the main control module 35 determines the left earphone 1/the right earphone 2 as the sending earphone according to the target information obtained in the step 2) and the recording request information in the step 3);
5) the microphone 7 of the sending earphone carries out recording to obtain a first audio frequency, and the first audio frequency is sent to the noise reduction module 34;
6) the noise reduction module 34 performs noise reduction processing on the first audio to obtain a second audio;
7) setting translation language information through a translation language setting module 36, and simultaneously sending the translation language information and the first audio frequency to the server 4 through a main control module 35;
8) the voice recognition module 41 performs voice recognition on the first audio to obtain a first text file;
9) the translation module 42 selects a translation target language according to the translation language information obtained in step 7), and translates the first character file into a target language character to obtain a second character file;
10) the voice synthesis module 43 performs voice synthesis on the second text file to obtain a third audio, and the server 4 sends the third audio to the mobile terminal 3;
11) the main control module 35 sends a second audio and a third audio to the corresponding target earphone according to the target information in step 2), and the target earphone plays the second audio and the third audio;
when the target earphone is a left earphone 1, the sending earphone is a right earphone 2; and when the target earphone is the right earphone 2, the sending earphone is the left earphone 1.
As a preferred scheme, the recording request message includes a key value, where the key value is a key value of the left earphone 1 or a key value of the right earphone 2.
As shown in fig. 3, the method for determining the sending earphone by the main control module 35 in step 4) includes the following steps:
1) the main control module 35 judges whether the key value is a key value of the left earphone 1, if so, the step 3) is performed, and if not, the step 2) is performed;
2) the main control module 35 judges whether the left earphone 1 is a sending earphone or not according to the target information, if so, the left earphone 1 is the sending earphone, and if not, the right earphone 2 is switched to be the sending earphone;
3) the main control module 35 determines whether the right earphone 2 is a sending earphone according to the target information, if so, the right earphone 2 is a sending earphone, and if not, the left earphone 1 is switched to be a sending earphone.
As shown in fig. 4, the method for performing noise reduction processing on the first audio by the noise reduction module 34 in step 6) includes the following steps:
1) the noise reduction module 34 analyzes the first audio to extract an environmental audio;
2) the noise reduction module 34 generates a second audio for canceling the ambient sound audio from the ambient sound audio obtained in step 1).
The invention has the beneficial effects that: the talkback function can be realized through the matching of the left earphone 1, the right earphone 2 and the mobile terminal 3 of the TWS earphone, and the talkback can be realized only by the participation of the TWS earphone and the mobile terminal 3, so that the talkback cost can be effectively reduced; because the mobile terminal 3 is provided with the noise reduction module 34, the noise reduction processing can be realized on the conversation audio frequency through the noise reduction module 34, the quality of the talkback conversation can be effectively improved, and the use experience of a user is improved; in addition, the mobile terminal 3 can also be in communication connection with the server 4, and through the voice recognition module 41, the translation module 42 and the voice synthesis module 43 of the server 4, when the talkback call is realized, the content of the talkback call can be translated, so that the practicability is higher, the use by a user is more convenient, and convenience is provided for the user.
The above description is only a preferred embodiment of the present invention, and all the minor modifications, equivalent changes and modifications made to the above embodiment according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims (9)

1. The utility model provides an intercom system based on TWS earphone realization which characterized in that: including mobile terminal and TWS earphone, the TWS earphone includes left earphone and right earphone, all be equipped with first bluetooth module, speaker, microphone on left side earphone and the right earphone and be used for controlling the button of recording switch, speaker, microphone and button all are connected with first bluetooth module electricity, be equipped with wireless communication module, object of talkbacking in the mobile terminal and set up the module, fall the module of making an uproar and host system, wireless communication module, object of talkbacking set up the module and fall the module of making an uproar and all be connected with the host system electricity, wireless communication module includes second bluetooth module, left side earphone and right earphone all are connected with the mobile terminal bluetooth through the cooperation of first bluetooth module and second bluetooth module.
2. The intercom system implemented based on a TWS headset of claim 1, wherein: the wireless communication module also comprises a mobile network module or/and a WiFi module.
3. A TWS headset-based intercom system as in claim 2 wherein: the mobile terminal is in communication connection with the server through the wireless communication module, and the server comprises a voice recognition module, a translation module and a voice synthesis module.
4. The intercom system implemented based on a TWS headset according to claim 3, characterized in that: the mobile terminal also comprises a translation language setting module, and the translation module selects a translation target language through the translation language setting module.
5. An intercom method, characterized by: the TWS headset-based intercom system of any of claims 1, said intercom method comprising the steps of:
1) the TWS earphone is connected with the mobile terminal through Bluetooth;
2) setting a left earphone/a right earphone as a target earphone through an talkback object setting module to obtain target information;
3) pressing a left earphone/right earphone button, and sending recording request information to the mobile terminal by the left earphone/right earphone;
4) the main control module of the mobile terminal determines the left earphone/the right earphone as a sending earphone according to the target information obtained in the step 2) and the recording request information in the step 3);
5) the microphone of the sending earphone carries out recording to obtain a first audio frequency, and the first audio frequency is sent to the noise reduction module;
6) the noise reduction module carries out noise reduction processing on the first audio to obtain a second audio;
7) the main control module sends a first audio and a second audio to corresponding target earphones according to the target information in the step 2), and the target earphones play the first audio and the second audio;
when the target earphone is a left earphone, the sending earphone is a right earphone; and when the target earphone is a right earphone, the sending earphone is a left earphone.
6. An intercom method, characterized by: the intercom system based on a TWS headset implementation of any one of claims 2-4, said intercom method comprising the steps of:
1) the TWS earphone is connected with the mobile terminal through Bluetooth;
2) setting a left earphone/a right earphone as a target earphone through an talkback object setting module to obtain target information;
3) pressing a left earphone/right earphone button, and sending recording request information to the mobile terminal by the left earphone/right earphone;
4) the main control module determines the left earphone/the right earphone as a sending earphone according to the target information obtained in the step 2) and the recording request information in the step 3);
5) the microphone of the sending earphone carries out recording to obtain a first audio frequency, and the first audio frequency is sent to the noise reduction module;
6) the noise reduction module carries out noise reduction processing on the first audio to obtain a second audio;
7) setting translation language information through a translation language setting module, and simultaneously sending the translation language information and the first audio frequency to a server through a main control module;
8) the voice recognition module carries out voice recognition on the first audio frequency to obtain a first text file;
9) the translation module selects a translation target language according to the translation language information obtained in the step 7), and translates the first character file into a target language character to obtain a second character file;
10) the voice synthesis module carries out voice synthesis on the second character file to obtain a third audio, and the server sends the third audio to the mobile terminal;
11) the main control module sends a second audio and a third audio to corresponding target earphones according to the target information in the step 2), and the target earphones play the second audio and the third audio;
when the target earphone is a left earphone, the sending earphone is a right earphone; and when the target earphone is a right earphone, the sending earphone is a left earphone.
7. An intercom method as in claim 5 or 6 wherein: the recording request information comprises a key value, and the key value is a left earphone key value or a right earphone key value.
8. An intercom method as in claim 7, wherein: the method for determining the earphone sending by the main control module in the step 4) comprises the following steps:
1) the main control module judges whether the key value is a left earphone key value, if so, the step 3) is carried out, and if not, the step 2) is carried out;
2) the master control module judges whether the left earphone is a sending earphone or not according to the target information, if so, the left earphone is the sending earphone, and if not, the right earphone is switched to be the sending earphone;
3) and the master control module judges whether the right earphone is the sending earphone or not according to the target information, if so, the right earphone is the sending earphone, and if not, the left earphone is switched to be the sending earphone.
9. An intercom method as in claim 8, wherein: the method for performing noise reduction processing on the first audio by the noise reduction module in the step 6) comprises the following steps:
1) the noise reduction module analyzes the first audio and extracts the environmental sound audio;
2) the noise reduction module generates second audio for counteracting the ambient sound audio according to the ambient sound audio obtained in the step 1).
CN201910808578.2A 2019-08-29 2019-08-29 Intercommunication system and intercommunication method realized based on TWS earphone Pending CN110708615A (en)

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CN113347509A (en) * 2020-02-18 2021-09-03 阿里巴巴集团控股有限公司 Intercommunication system and intercommunication device interaction method
CN113808592A (en) * 2021-08-17 2021-12-17 百度在线网络技术(北京)有限公司 Method and device for transcribing call recording, electronic equipment and storage medium
CN113825107A (en) * 2021-09-22 2021-12-21 南京大鱼半导体有限公司 Intercommunication processing method and device based on true wireless stereo headset
CN114760295A (en) * 2022-03-03 2022-07-15 上海华信长安网络科技有限公司 Method and device for realizing intelligent information management by sharing charging of earphones

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