CN107888771B - Multi-voice fusion communication method based on android platform - Google Patents

Multi-voice fusion communication method based on android platform Download PDF

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CN107888771B
CN107888771B CN201711089725.2A CN201711089725A CN107888771B CN 107888771 B CN107888771 B CN 107888771B CN 201711089725 A CN201711089725 A CN 201711089725A CN 107888771 B CN107888771 B CN 107888771B
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audio
analog
voice
local
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CN107888771A (en
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李涛
魏博
刘庚
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Shaanxi Zhonglian Dianke Electronics Co ltd
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Shaanxi Zhonglian Dianke Electronics Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/7243—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages
    • H04M1/72433—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages for voice messaging, e.g. dictaphones
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G11B2020/10546—Audio or video recording specifically adapted for audio data

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Abstract

The invention relates to a multi-voice fusion communication method based on an android platform, which comprises the following steps of: left channel recording: android system turns on analog switch S through audio circuit control modulez1The local audio input module passes the collected local audio signal through the analog switch Sz1The audio signals are sequentially sent to a left analog audio mixing module and a left analog-to-digital conversion module to complete left channel recording through a left input end of an android system; and/or right-dart recording: android system turns on analog switch S through audio circuit control moduley1The local audio input module passes the collected local audio signal through the analog switch Sy1And the sound is sequentially sent to a right analog sound mixing module and a right analog-to-digital conversion module to complete right sound channel recording through the right input end of the android system. The interphone communication function of the invention is no longer an auxiliary function of the mobile phone communication function, and the switching between the mobile phone and the interphone communication function at any time is realized.

Description

Multi-voice fusion communication method based on android platform
Technical Field
The invention relates to the technical field of voice communication, in particular to a multi-voice fusion communication system based on an android platform, and specifically relates to a voice communication method capable of simultaneously supporting satellite communication, private network communication (trunking talkback, ELTE and the like) and public network mobile communication.
Background
With the development of the current communication technology, more and more communication devices are available, and in general, the existing multifunctional communication device adopts a voice communication method that when communicating with other devices, an operator network (i.e., a mobile public network) is generally used for communicating, or a regional talkback network (i.e., a private network) is used for talkback. However, the existing voice communication method cannot realize the regional talkback function by using the operator network, and cannot realize the public network mobile communication function by using the regional talkback network. Such a voice communication method has a great limitation in practical use. In order to overcome the limitation, terminals of a public network (2G/3G/4G mobile phone call) and a private network (interphone call) are designed, the terminals are mostly 'mobile phones with interphone functions', namely, an interphone module is added in a mobile phone communication chip, the main function of the interphone module is a mobile phone, and the interphone has an auxiliary function.
Although the mobile phone with the function of the interphone solves the public problem of the public network and the private network, the mobile phone also has the following defects:
1) in the terminals such as the mobile phone with the interphone function, the private network (interphone function) is only an accessory of the public network (mobile phone function), is mainly used for a standby call mode when the signal of the public network (mobile phone function) is poor, and is not suitable for the situation that the public network and the private network call modes are effective under any situation.
2) The mobile phone with the interphone function only realizes a communication mode of integrating the interphone function on the mobile phone, and does not make corresponding improvement on an audio system, so that the actual voice using effect is greatly reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a multi-voice fusion communication system based on an android platform. Namely, by using the public network mobile communication module, the mobile voice communication between the device and other devices can be realized, and the regional talkback voice communication can also be realized with the device based on the cluster module.
The technical solution of the invention is as follows:
a multi-voice fusion communication method based on an android platform is characterized by comprising the following steps:
1) recording:
left channel recording: android system turns on analog switch S through audio circuit control modulez1The local audio input module passes the collected local audio signal through the analog switch Sz1The audio signals are sequentially sent to a left analog audio mixing module and a left analog-to-digital conversion module to complete left channel recording through a left input end of an android system;
and/or right-dart recording: android systemAnalog switch S is turned on through audio circuit control moduley1The local audio input module passes the collected local audio signal through the analog switch Sy1And the sound is sequentially sent to a right analog sound mixing module and a right analog-to-digital conversion module to complete right sound channel recording through the right input end of the android system.
Further comprising step 2): the voice playing is divided into two modes, wherein the first mode is local voice playing, and the second mode is remote voice playing;
the first way is that the local voice playing specifically comprises:
android system turns on analog switch S through audio circuit control modulez2The left output end of the android system sends the recorded voice to the left digital audio mixing module and the left analog-to-digital conversion module in sequence through the analog switch Sz2Then outputting two paths, wherein one path is voice DACL, and the other path is voice MAXL after passing through a left secondary analog audio mixing module; the voice DACL and the voice MAXL are both input into a left selection switch and are input into a left channel of the audio output module after passing through the left selection switch;
and/or the android system turns on the analog switch S through the audio circuit control moduley2The right output end of the android system sends the recorded voice to the right digital audio mixing module and the right analog-to-digital conversion module in sequence through the analog switch Sy2Then, two paths of voice DACR are output, one path of voice DACR passes through the right secondary analog sound mixing module, and the other path of voice MAXR is output; the voice DACR and the voice MAXR are both input into a right selection switch, and are input into a right channel of the audio output module after passing through the right selection switch;
the second way is remote voice playing:
the external audio input module sequentially sends the acquired external audio signals to the left digital audio mixing module and the left analog-to-digital conversion module through the analog switch S through the left output end of the communication modulez2Then, two paths of audio are output, one path is left channel audio DACL, and the other path passes through a left secondary analog audio mixing module and then outputs left channel audio mixing MAXL; the DACL and the MAXL are input into a left selection switch and then input into a left channel of the audio output module after passing through the left selection switch;
and/or the external audio input module sequentially sends the acquired external audio signals to the right digital audio mixing module and the right analog-to-digital conversion module through the analog switch S through the right output end of the communication moduley2Then, two paths of audio are output, one path is a right channel audio DACR, and the other path passes through a right secondary analog sound mixing module and then outputs a right channel sound mixing MAXR; the DACR and the MAXR are both input into a right selection switch, and are input into a left channel of the audio output module after passing through the right selection switch;
further comprising step 3) trunking talkback: android system turns on analog switch S through audio circuit control modulej1、Sj2、Sj3Local speech signal MICBST through analog switch Sj1The audio mixing signal enters a cluster analog audio mixing module and is output to a cluster talkback module, and the right audio mixing signal MAXR passes through an analog switch Sj2The audio mixing is output to a cluster talkback module after entering a cluster analog audio mixing module, and the left audio mixing MAXL passes through an analog switch Sj3And the android system drives the PTT of the cluster talkback module to send voice through the audio circuit control module.
And the local audio input module respectively sends the acquired local audio signals to the left secondary simulation module or the right secondary simulation module.
The voice output by the right analog-to-digital conversion module is converged with the voice output by the left analog-to-digital conversion module; the voice output by the left analog-to-digital conversion module is converged with the voice output by the right analog-to-digital conversion module.
The left channel audio DACL, the left channel mixed sound MIXL, the right channel audio DACR and the right channel mixed sound MIXR are also connected to a one-out-of-four selection switch, and the output end of the one-out-of-four selection switch is connected with the audio output module.
The local audio input module includes a local MIC and a headset MIC.
The communication module comprises a 2G/3G/4G module and a satellite communication module.
The audio output module comprises earphones of a local sound box, a local earphone and an earphone microphone, and the left sound mixing MIXL and the right sound mixing MIXR are respectively connected with the earphone microphone through analog switches Sz4And a moldPseudo switch Sj4The output end of the one-out-of-four selection switch is connected with a local earphone, and the left selection switch is connected with the local earphone through an analog switch Sz5The right selection switch is connected with the earphone pin HPOUTL of the earphone, and the right selection switch is connected with the earphone pin HPOUTR of the earphone.
The invention has the following beneficial effects:
(1) the interphone communication function is no longer an auxiliary function of the mobile phone communication function, and the mobile phone and the interphone communication function can be switched at any time;
(2) the audio of the public network and the audio of the private network are played by the same playing device (a local earphone or an earphone), so that the number of audio playing devices is reduced; the audio playing device can be suitable for various different types of audio playing devices, including loudspeakers, earphones, Bluetooth and the like;
(3) the invention also provides a recording function, and the public network and private network call voice can be recorded by utilizing the public network audio processing chip; and an inverting adder is additionally arranged, so that the circuit structure is greatly simplified.
(4) The invention comprises a plurality of 4G mobile communication modules, a cluster talkback module and a local system, can realize intercommunication of a plurality of voices, and can effectively realize the purpose to bring the following beneficial effects:
1) multiple communication networks independent before can be organically interconnected and communicated without mutual interference
2) Mutual noninterference of interconnection intercoms among a plurality of devices and between devices and center
3) There is no voice loop problem.
Drawings
Fig. 1 is a schematic circuit diagram of a multi-voice fusion communication system based on an android platform according to the present invention.
Fig. 2 is a schematic diagram of an embodiment of the present invention.
Detailed Description
Example 1: as shown in FIG. 1, an implementation system of a multi-voice fusion communication method based on an android platform comprises an android system, an audio circuit control module, a communication module, a trunking talkback module, an audio input module, an audio processing module, an analog switch unit, a selection switch and an audio output module,
the audio circuit control module receives an instruction of the android system to control the analog switch and the selection switch so as to realize the opening or closing of the voice channel; the voice channel comprises a left audio channel, a right audio channel and an intercom channel; the audio input module comprises a local audio input module and an external audio input module, and the local audio input module transmits the collected local audio signals to the audio processing module; the external audio input module sends the acquired external audio signals to the audio processing module through the communication module; the audio processing module processes the local audio signal and transmits the processed local audio signal to the android system or the audio output module or the communication module or the trunking talkback module; the audio processing module processes the external audio signals and then transmits the processed external audio signals to the cluster talkback module or the audio output module; the cluster talkback module receives the audio signals sent by the audio processing module to be played, and the audio circuit control module drives the cluster talkback module to send the voice to the audio processing module.
Example 2: the audio processing module comprises a first analog audio mixing module, a second analog audio mixing module, a digital-to-analog conversion module and a second analog audio mixing unit, and external audio signals sequentially pass through the communication module, the digital audio mixing module, the digital-to-analog conversion module and the second analog audio mixing module to enter the cluster talkback module or the audio output module;
the local audio signals enter the android system or the communication module through the analog audio mixing module I and the analog-to-digital conversion module in sequence; or the local audio signal enters the audio output module through the analog audio mixing module I, the analog-to-digital conversion module, the digital audio mixing module, the digital-to-analog conversion module and the analog audio mixing module II in sequence; or the local audio signal enters the audio output module or the cluster talkback module through the analog audio mixing module II.
Example 3: in order to realize the three-dimensional left and right double channels.
The second-order analog sound mixing module comprises a left second-order analog sound mixing module, a right second-order analog sound mixing module and a cluster analog sound mixing module; the analog-to-digital conversion module comprises a left analog-to-digital conversion module and a right analog-to-digital conversion module, the digital sound mixing module comprises a left digital sound mixing module and a right digital sound mixing module, the digital-to-analog conversion module comprises a left digital-to-analog conversion module and a right digital-to-analog conversion module, and the selection switch comprises a left selection switch and a right selection switch;
an analog switch S is connected between the local audio input module and the left analog sound mixing modulez1The output end of the left analog sound mixing module is connected with the input end of the left analog-to-digital conversion module, one path of the output end of the left analog-to-digital conversion module is connected with the left input end of the installation system, the other path of the output end of the left analog-to-digital conversion module is connected with one input end of the left digital sound mixing module, and the third path of the output end of the left analog-to-digital conversion; the left output end of the android system is connected with the other input end of the left digital audio mixing module, the left output end of the communication module is connected with the third input end connected with the left digital audio mixing module, the output end of the left digital audio mixing module is connected with the input end of the left digital-to-analog conversion module, the output end of the left digital-to-analog conversion module generates a left audio channel DACL, and the left audio channel DACL passes through an analog switch SZ2Then directly enters a left selection switch, and the audio DACL of the left sound channel passes through an analog switch SZ2Then, a left channel mixed sound MIXL is generated through a left secondary analog mixed sound module; the left sound mixing MIXL is output through an audio output module through a left selection switch; the left sound mixing MIXL is used as an audio signal and is input to the analog sound mixing module;
an analog switch S is connected between the input ends of the local audio input module and the right analog sound mixing moduley1The output end of the right analog sound mixing module is connected with the input end of the right analog-to-digital conversion module, one path of the output end of the right analog-to-digital conversion module is connected with the right input end of the installation system, the other path of the output end of the right analog-to-digital conversion module is connected with one input end of the right digital sound mixing module, and the third path of the output end of the right analog-to-digital conversion; the right output end of the android system is connected with the other input end of the right digital sound mixing module, the right output end of the communication module is connected with the third input end connected with the right digital sound mixing module, the output end of the right digital sound mixing module is connected with the input end of the right digital-to-analog conversion module, the output end of the right digital-to-analog conversion module generates right channel audio DACR, and the right channel audio DACR passes through an analog switch Sy2Then directly reaches a right selection switch, and the right channel audio DACR passes through an analog switch Sy2Then generating a right sound channel mixed sound MIXR through a right secondary simulation mixed sound module; the right channel mixed sound MIXR is output through the audio output module through the right selection switch; the right sound mixing MIXR is used as an audio signal and input to the analog sound mixing module;
local audio input module passes through analog switch Sj1Connected with the input of the cluster analog sound mixing module, and the right sound mixing MIXR passes through an analog switch Sj2Connected with the input of the cluster analog sound mixing module, the left sound mixing MIXL passes through an analog switch Sj3The output end of the cluster analog audio mixing module is connected with the audio input end of the cluster talkback module, and a voice signal LINEIN generated by the cluster talkback module is connected with the input ends of the left analog audio mixing module and the right analog audio mixing module through the audio output end respectively.
Example 3: to implement the talk-back function. The local audio input module is also respectively connected with the right secondary simulation audio mixing module and the left secondary simulation audio mixing module, and a voice signal LINEIN generated by the cluster talkback module is respectively connected with the input ends of the left secondary simulation audio mixing module and the right secondary simulation audio mixing module through an audio output end.
Example 4: in order to realize the synchronization of the left and right sound channels, the output end of the right digital-to-analog conversion module passes through an analog switch Sy3And an analog switch SZ2The output end of the left digital-to-analog conversion module passes through an analog switch Sz3And an analog switch Sy2Is connected.
Embodiment 5, as shown in fig. 2, the present invention relates to a multi-voice access method after an android system accesses a trunking intercom and a plurality of public network communication modules/satellite communication modules. The system comprises an android system, an audio circuit control module, a 2G/3G/4G public network communication module, a satellite communication module, a trunking talkback module, analog switches (S1, S2 … … S23), analog sound mixing modules (1, 2, 3, 4, 5), digital sound mixing modules (1, 2), analog-to-digital conversion modules (1, 2), a digital-to-analog conversion module (1, 2), a 1-in-4 selection switch and a 1-in-2 selection switch.
The working method of the invention is that the audio circuit control module is connected with the analog switch (S1, S2 … … S23), the 1-from-4 selection switch, the 1-from-2 selection switch and the trunking talkback module, and the audio circuit control module controls the connection modules to work coordinately according to the command of the android system.
The analog switches S1-S23 realize the opening or closing of voice channels.
The analog mixing modules (1, 2, 3, 4 and 5) realize the mixing of multi-path analog voice.
The digital sound mixing modules (1 and 2) realize the mixing of multi-path digital voice.
The analog-to-digital conversion modules (1 and 2) convert analog voice into digital voice and convert the digital voice into a voice format which can be recognized by an android system.
And the digital-to-analog conversion modules (1 and 2) convert the digital voice of the android system into analog voice.
The 4-to-1 selection switch is used for selecting one of the 4 voice channels.
The 2-to-1 selection switch is used for selecting one of the 2 voice channels.
The working method of the invention is described in connection with fig. 2:
working mode 1: common mode (in this mode, the equipment completes the functions of recording and voice playing)
Firstly, the android system turns on analog switches S1 and S6 through an audio circuit control module, voices collected by a local MIC sequentially pass through S1, and a left sound channel is recorded through an analog sound mixing module 1, an analog-to-digital conversion module 1 and the android system; meanwhile, if the voice collected by the local MIC sequentially passes through the S6, the analog sound mixing module 2 and the analog-to-digital conversion module 2 to the android system, right channel recording is performed. If the voice collected by the local MIC passes through the two paths at the same time, double-channel recording can be realized.
Firstly, the android system turns on analog switches S12, S15, S16 and S17 through an audio circuit control module, and left channel voice of the android system sequentially passes through a digital audio mixing module 1, a digital-to-analog conversion module 1, an analog switch S12, an analog audio mixing module 3 and an analog switch S16 to provide left channel voice of a local sound box; meanwhile, the right channel voice of the android system sequentially passes through the digital sound mixing module 2, the digital-to-analog conversion module 2, the analog switch S15, the analog sound mixing module 4 and the analog switch S17 to provide the right channel voice of the local sound box. If the voice of the android system passes through the two paths at the same time, the stereo playing of the local sound box can be realized.
The working mode 2 is as follows: single talk mode (this mode only implements the trunked talk function):
the single talkback mode is divided into two modes, the first mode is to realize talkback by utilizing a local MIC and a local receiver, and the work flow is as follows:
the sending process of local MIC voice through the cluster talkback module is as follows: firstly, the android system turns on analog switches S18 and S20 through an audio circuit control module, and drives a 4-to-1 selection switch to gate MIXR;
the voice collected by the local MIC sequentially passes through the analog switch S20 and the analog sound mixing module 5 to enter an audio input channel of the trunking talkback module, and meanwhile, the android system drives the PTT of the trunking talkback module to send the voice through the audio circuit control module;
the cluster talkback voice receiving process comprises the following steps: after the cluster intercom module receives external voice data, an audio output channel of the cluster intercom module sequentially passes through the sound mixing module 4, the 1-out-of-4 selection switch and the analog switch S18 and is played by a local earphone.
The second mode is to use an external earphone to realize intercommunication, and only change a local MIC into the MIC of the earphone, and change a local earphone into the earphone of the earphone, and the working process is similar to that described in the first mode, specifically: firstly, the android system turns on an analog switch S21 through an audio circuit control module, and drives a 2-to-1 selection switch to gate MIXR;
the voice collected by the external headset sequentially enters an audio input channel of the trunking talkback module through the analog switch S21 and the analog sound mixing module 5, and meanwhile, the android system drives the PTT of the trunking talkback module to send the voice through the audio circuit control module;
the cluster talkback voice receiving process comprises the following steps: after the cluster intercom module receives external voice data, an audio output channel of the cluster intercom module sequentially passes through the sound mixing module 4 and the 2-to-1 selection switch and is played by the external earphone microphone.
Working mode 3: three-party intercommunication mode (under this mode, realize the intercommunication function between the remote center and the local device, the remote center and the regional cluster intercommunication network device, the local device and the regional cluster intercommunication network device)
Firstly, the android system opens analog switches S1, S6, S12, S15, S18, S20 and S23 through an audio circuit control module, and drives a 4-to-1 selection switch to gate MIXR;
the local MIC voice sending process and the trunking talkback voice receiving process are the same as the mode 2;
the talkback flow of the local MIC and the far-end center voice is that the local MIC voice sequentially passes through the analog switch S1, the analog audio mixing module 1 and the analog-to-digital conversion module 1 to enter an android system and reaches the far-end center through the public network communication module or the satellite module;
the far-end center enters audio input of the trunking talkback module through a right channel voice of the android system sequentially through the digital audio mixing module 2, the analog switch S15, the analog audio mixing module 4, the analog switch S23 and the analog audio mixing module 5, and meanwhile, the android system drives PTT of the trunking talkback module to send voice through the audio circuit control module; in addition, the MIXR voice can be played through a local earphone via a 4-to-1 selection switch and S18 in sequence;
the local MIC and far-end center voice talkback process comprises the steps that after receiving voice data, the cluster talkback module sequentially passes through the analog switch S6, the analog sound mixing module 2 and the analog-to-digital conversion module 2 to the right sound channel of an android system through the audio output channel of the cluster talkback module and reaches the far-end center through the public network communication module or the satellite module, and meanwhile, the audio output channel of the cluster talkback module sequentially passes through the sound mixing module 4, the 4-to-1 selection switch and the analog switch S18 to be played on a local earphone.
Further, the local MIC and the voice of the cluster intercom module may be simultaneously directed to the remote center. The specific method is shown in the talkback flow of local MIC and far-end center voice and the talkback flow of local MIC and far-end center voice.
Furthermore, the specific method of the method is similar to the previous method by adopting an extrapolation headset mode of local equipment to realize the three-party talkback.
The working mode 4 is as follows: communication between public network communication module/satellite communication module and cluster intercom module
Firstly, the android system opens the analog switches S1, S8, S12, S15, S18, S20 and S23 through the audio circuit control module, and drives the 4-to-1 selection switch to gate MIXR;
voice call flow of public network communication module/satellite communication module: the voice collected by the local MIC sequentially passes through an analog switch S1, an analog sound mixing module 1 and an analog-to-digital conversion module 1 to be input into a left audio channel of a public network communication module/satellite communication module; the voice of the public network communication module/satellite communication module is output through a left sound channel and is played to the local receiver through the digital sound mixing module 1, the digital-to-analog conversion module 1, the analog switch S12, the analog sound mixing module 3, the 1-out-of-4 selection switch and the analog switch S18 in sequence.
The voice call process of the cluster talkback module and the public network communication module/satellite communication module comprises the following steps: an audio output channel of the trunking intercom module sequentially passes through the S8, the analog audio mixing module 2 and the analog-to-digital conversion module 2 to an audio input right channel of the public network communication module/the satellite communication module; the voice of the public network communication module/satellite communication module is output through a right sound channel, enters an audio input channel of the trunking talkback module sequentially through the digital audio mixing module 2, the digital-to-analog conversion module 2, the analog switch S15, the analog audio mixing module 4, the analog switch S20 and the analog audio mixing module 5, and meanwhile, the android system drives the PTT of the trunking talkback module to send the voice through the audio circuit control module.
Furthermore, the voice call between the trunking intercom module and the public network communication module/satellite communication module is realized by adopting an external headset way, and the specific method is similar to the previous method.

Claims (4)

1. A multi-voice fusion communication method based on an android platform is characterized by comprising the following steps:
1) recording:
left channel recording: the android system turns on an analog switch Sz1 through an audio circuit control module, and a local audio input module sequentially sends acquired local audio signals to a left analog audio mixing module and a left analog-to-digital conversion module through an analog switch Sz1 to complete left channel recording through a left input end of the android system;
and/or right channel recording: the android system turns on an analog switch Sy1 through an audio circuit control module, a local audio input module sequentially sends acquired local audio signals to a right analog sound mixing module and a right analog-to-digital conversion module through an analog switch Sy1, and right sound channel recording is completed through the right input end of the android system;
step 2)
2) The voice playing is divided into two modes, wherein the first mode is local voice playing, and the second mode is remote voice playing;
the first way is that the local voice playing specifically comprises:
the android system turns on an analog switch Sz2 through an audio circuit control module, recorded voice is sequentially sent to a left digital audio mixing module by a left output end of the android system, the left digital-to-analog conversion module outputs two paths after passing through an analog switch Sz2, one path is voice DACL, and the other path outputs voice MIXL after passing through a left secondary analog audio mixing module; the voice DACL and the voice MIXL are input into a left selection switch and then input into a left channel of the audio output module after passing through the left selection switch;
and/or the android system turns on an analog switch Sy2 through an audio circuit control module, the right output end of the android system sequentially sends the recorded voice to a right digital audio mixing module, a right digital-to-analog conversion module and outputs two paths after passing through an analog switch Sy2, one path is a voice DACR, and the other path outputs a voice MIXR after passing through a right secondary analog audio mixing module; the voice DACR and the voice MIXR are input into a right selection switch, and are input into a right channel of the audio output module after passing through the right selection switch;
the second way is remote voice playing:
the external audio input module sequentially sends the acquired external audio signals to the left digital audio mixing module through the left output end of the communication module, the left digital-to-analog conversion module outputs two paths after passing through the analog switch Sz2, one path is left channel audio DACL, and the other path outputs left channel audio mixing MIXL after passing through the left secondary analog audio mixing module; the DACL and MIXL are input into a left selection switch, and are input into a left channel of the audio output module after passing through the left selection switch;
and/or the external audio input module sequentially sends the acquired external audio signals to the right digital audio mixing module through the right output end of the communication module, the right digital-to-analog conversion module outputs two paths after passing through the analog switch Sy2, one path is a right channel audio DACR, and the other path outputs a right channel audio mixing MIXR after passing through the right secondary analog audio mixing module; the right channel audio DACR and the right channel mixed sound MIXR are both input into a right selection switch, and are input into a right channel of the audio output module after passing through the right selection switch;
step 3)
3) Trunking talkback:
the android system turns on analog switches Sj1, Sj2 and Sj3 through an audio circuit control module, a local voice signal MICBST enters a cluster analog sound mixing module through an analog switch Sj1 and is output to a cluster talkback module, a right sound mixing MIXR enters the cluster analog sound mixing module through an analog switch Sj2 and is output to the cluster talkback module, a left sound mixing MIXL enters the cluster analog sound mixing module through an analog switch Sj3 and is output to the cluster talkback module, and the android system drives PTT of the cluster talkback module to send voice through the audio circuit control module;
the local audio input module respectively sends the collected local audio signals to the left secondary analog audio mixing module or the right secondary analog audio mixing module;
the voice output by the right digital-to-analog conversion module is converged with the voice output by the left digital-to-analog conversion module; the voice output by the left digital-to-analog conversion module is converged with the voice output by the right digital-to-analog conversion module;
the left channel audio DACL, the left channel mixed sound MIXL, the right channel audio DACR and the right channel mixed sound MIXR are also connected to a one-out-of-four selection switch, and the output end of the one-out-of-four selection switch is connected with the audio output module.
2. The android platform-based multi-voice fusion communication method of claim 1, comprising: the local audio input module includes a local MIC and a headset MIC.
3. The android platform-based multi-voice fusion communication method of claim 1, comprising: the communication module comprises a 2G/3G/4G module and a satellite communication module.
4. The android platform-based multi-voice fusion communication method of claim 3, wherein: the audio output module includes the earphone of local audio amplifier, local earphone and headset, left channel audio mixing MIXL and right channel audio mixing MIXR are connected with local audio amplifier through analog switch Sz4 and analog switch Sj4 respectively, a selection switch's output of four choices is connected with local earphone, left side selection switch passes through analog switch Sz5 and is connected with the earphone pin HPOUTL of headset, right side selection switch is connected with the earphone pin HPOUTR of headset.
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