CN107948402B - Left and right sound channel time-sharing control system based on android platform - Google Patents

Left and right sound channel time-sharing control system based on android platform Download PDF

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Publication number
CN107948402B
CN107948402B CN201711089649.5A CN201711089649A CN107948402B CN 107948402 B CN107948402 B CN 107948402B CN 201711089649 A CN201711089649 A CN 201711089649A CN 107948402 B CN107948402 B CN 107948402B
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analog
audio
digital
sound mixing
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CN107948402A (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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/605—Portable telephones adapted for handsfree use involving control of the receiver volume to provide a dual operational mode at close or far distance from the user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • 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
    • H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
    • H04M1/72415—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories for remote control of appliances
    • 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
    • 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
    • H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files

Abstract

The invention relates to a left and right channel time-sharing control system based on an android platform, which 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, wherein the audio input module is connected with the audio processing module; analog switches are respectively arranged on a left sound channel and a right sound channel before a secondary analog sound mixing module, so that the left sound channel and the right sound channel are controlled in a time-sharing mode. The invention can realize time-sharing control of the left and right sound channels and meet the requirements of a multi-voice environment.

Description

Left and right sound channel time-sharing control system 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 left and right channel time-sharing control system based on the android platform.
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/5G 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 belongs to 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 call modes of the public network and the private network are effective.
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 voice effect in practical use is greatly reduced.
3) The left and right sound channels of the existing mobile phone with the talkback function can not be controlled independently.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a left and right channel time-sharing control system based on an android platform, and the left and right channels can be out of synchronization.
The technical solution of the invention is as follows:
a left and right channel time-sharing control system based on an android platform comprises the 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, 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, the selector switch and the trunking talkback module so as to open or close 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 collected external audio signals to the audio processing module through the communication module;
the audio processing module processes a 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 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 signal from the audio processing module to perform wireless transmission, converts the received wireless signal into an audio signal and transmits the audio signal to the audio processing module; the audio circuit control module drives the trunking talkback module to send voice to the audio processing module;
the audio processing module comprises a first analog sound mixing module, an analog-to-digital conversion module, a digital sound mixing module, a digital-to-analog conversion module and a second analog sound mixing module;
the external audio signals sequentially pass through the communication module, the digital audio mixing module, the digital-to-analog conversion module and the analog audio mixing module II and 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;
the first analog sound mixing module comprises a left analog sound mixing module and a right analog sound mixing module, and the second analog sound mixing module comprises a left secondary analog sound mixing module, a right secondary 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 Sz1 is connected between the local audio input module and the left analog sound mixing module, the 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 android 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; the left output end of the android system and the other input end of the left digital audio mixing moduleThe 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 DACL, and the left audio 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 cluster analog sound mixing module;
an analog switch Sy is connected between the input ends of the local audio input module and the right analog sound mixing module1The 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 android 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 module is; the right output end of the android system is connected with the other input end of the right digital audio mixing module, the right output end of the communication module is connected with the third input end connected with the right digital audio mixing module, the output end of the right digital audio 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 is input to the cluster analog sound mixing module;
the local audio input module is connected with the 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 sound mixing module is connected with the sound of the cluster talkback moduleThe audio input end is connected, and the speech signal LINEIN generated by the cluster talkback module is respectively connected with the input ends of the left analog sound mixing module and the right analog sound mixing module through the audio output end;
the local audio input module is also respectively connected with the right secondary analog audio mixing module and the left secondary analog 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 analog audio mixing module and the right secondary analog audio mixing module through the audio output end;
the output end of the right digital-to-analog conversion module passes through an analog switch Sy2And an analog switch SZ3The output end of the left digital-to-analog conversion module passes through an analog switch Sz2And an analog switch Sy3The via connection of (a);
the audio system also comprises a four-out-of-one selection switch, wherein the left channel audio DACL, the left channel mixed audio MIXL, the right channel audio DACR and the right channel mixed audio MIXR are all connected to the four-out-of-one selection switch, and the output end of the four-out-of-one 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/5G 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 through analog switches Sz4And an analog switch Sy4The 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 invention can realize the asynchronism of the left and right sound channels.
(2) 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;
(3) 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;
(4) 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.
(5) The invention comprises a plurality of 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 interconnected and not interfere with each other
2) Interconnection and intercommunication among a plurality of devices, and interconnection and mutual noninterference between devices and centers
3) There is no voice loop problem.
Drawings
Fig. 1 is a schematic circuit diagram of a left and right channel time-sharing control 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, a multi-voice fusion communication system 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 android 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 module;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 android 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 module; 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 Sj3Input connection with cluster analog audio mixing module, output end of cluster analog audio mixing module and cluster talkback moduleThe audio input end of the block is connected, and the speech signal LINEIN generated by the cluster talkback module is respectively connected with the input ends of the left analog sound mixing module and the right analog sound mixing module through the audio output end.
Example 4: 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 5: 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 Sy2And an analog switch SZ3The output end of the left digital-to-analog conversion module passes through an analog switch Sz2And an analog switch Sy3Is connected.
Example 6: as shown in fig. 2, the present invention relates to a multi-voice access method after the android system accesses to the trunking talkback and the multiple public network communication modules/satellite communication modules. The system comprises an android system, an audio circuit control module, a 2G/3G/4G/5G 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)
The recording process comprises that firstly, the android system turns on the analog switch S through the audio circuit control module1、S6The voice collected by local MIC passes through S in turn1If the analog audio mixing module 1 and the analog-to-digital conversion module 1 reach the android system, recording a left sound channel; meanwhile, if the voice collected by the local MIC sequentially passes through S6And if the analog sound mixing module 2 and the analog-to-digital conversion module 2 reach the android system, right channel recording is carried out. If the voice collected by the local MIC passes through the two paths at the same time, double-channel recording can be realized.
The working process of playing voice is that firstly, the android system turns on the analog switch S through the audio circuit control module12、S15、S16、S17The left channel voice of the android system sequentially passes through the digital audio mixing module 1, the digital-to-analog conversion module 1 and the analog switch S12Analog sound mixing module 3 and analog switch S16Providing left channel voice of a local sound box; meanwhile, the right channel voice of the android system sequentially passes through the digital audio mixing module 2, the digital-to-analog conversion module 2 and the analog switch S15Analog sound mixing module 4 and analog switch S17And providing the right channel voice of the local loudspeaker 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 the analog switch S through the audio circuit control module18、S20Driving a 4-to-1 selection switch to gate MIXR;
voice collected by local MIC sequentially passes through analog switch S20The analog audio mixing module 5 enters an audio input channel of the trunking talkback module, and meanwhile, the android system drives the PTT of the trunking talkback module to send voice through the audio circuit control module;
the cluster talkback voice receiving process comprises the following steps: after the cluster talkback module receives external voice data, an 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 S18And playing on a local receiver.
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 the analog switch S through the audio circuit control module21Driving a 2-to-1 selection switch to gate MIXR;
the voice collected by the external earphone sequentially passes through the analog switch S21The analog audio mixing module 5 enters an audio input channel of the trunking talkback module, and meanwhile, the android system drives the PTT of the trunking talkback module to send 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)
The working process comprises the following steps that firstly, the android system turns on the analog switch S through the audio circuit control module1、S6、S12、S15、S18、S20、S23Driving 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 intercom process of the local MIC and the far-end central voice comprises that the local MIC voice sequentially passes through the analog switch S1The analog audio mixing module 1 and the analog-to-digital conversion module 1 enter an android system and reach a far-end center through a public network communication module or a satellite module;
the far-end center passes through the digital audio mixing module 2 and the analog switch S in turn through the right channel voice of the android system15Analog sound mixing module 4 and analog switch S23The analog audio mixing module 5 enters the audio input of the trunking talkback module, and meanwhile, the android system drives the PTT of the trunking talkback module to send voice through the audio circuit control module; in addition, MIXR voice can pass through a 4-to-1 selection switch and S in sequence18Playing in a local receiver;
the talkback process of local MIC and far-end center voice comprises the steps that after receiving voice data, the cluster talkback module passes through an audio output channel of the cluster talkback module and then sequentially passes through an analog switch S6The analog audio mixing module 2, the analog-digital conversion module 2 and the right sound channel of the android system reach 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 audio mixing module 4, the selection switch 1 from 4 and the analog switch S18Played on the local handset.
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 turns on the analog switch S through the audio circuit control module1、S8、S12、S15、S18、S20、S23Driving a 4-to-1 selection switch to gate MIXR;
voice call flow of the public network communication module/satellite communication module: voice collected by local MIC sequentially passes through analog switch S1The left analog audio mixing module, the left analog-to-digital conversion module and the public network communication module/satellite communication module are connected with the audio input left sound channel; the voice of the public network communication module/satellite communication module is output through a left sound channel and sequentially passes through the left digital sound mixing module, the left digital-to-analog conversion module and the analog switch S12A left secondary analog sound mixing module, a 4-to-1 selection switch and an analog switch S18And playing to a local receiver.
The voice call process of the cluster talkback module and the public network communication module/satellite communication module comprises the following steps: the audio output channel of the cluster talkback module passes through S in sequence8The right analog sound mixing module, the right analog-to-digital conversion module and the public network communication module/satellite communication module are connected with the audio input right sound channel; the voice of the public network communication module/satellite communication module is output through a right sound channel and sequentially passes through the right digital sound mixing module, the right digital-to-analog conversion module and the analog switch S15Right secondary simulation sound mixing module and analog switch S20The cluster simulation sound mixing module enters an audio input channel of the cluster talkback module, and meanwhile, the android system drives the PTT of the cluster talkback module to send voice through the audio circuit control module.
Furthermore, the voice call between the trunking talkback 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 left and right channel time-sharing control system based on an android platform comprises the 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, 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, the selector switch and the trunking talkback module so as to open or close 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 collected external audio signals to the audio processing module through the communication module;
the audio processing module processes a 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 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 signal from the audio processing module to perform wireless transmission, converts the received wireless signal into an audio signal and transmits the audio signal to the audio processing module; the audio circuit control module drives the trunking talkback module to send voice to the audio processing module;
the audio processing module comprises a first analog sound mixing module, an analog-to-digital conversion module, a digital sound mixing module, a digital-to-analog conversion module and a second analog sound mixing module;
the external audio signals sequentially pass through the communication module, the digital audio mixing module, the digital-to-analog conversion module and the analog audio mixing module II and 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;
the first analog sound mixing module comprises a left analog sound mixing module and a right analog sound mixing module, and the second analog sound mixing module comprises a left secondary analog sound mixing module, a right secondary 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 android 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 module is; 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 cluster 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 android 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 module is; the right output end of the android system is connected with the other input end of the right digital audio mixing module, the right output end of the communication module is connected with the third input end connected with the right digital audio mixing module, the output end of the right digital audio 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 Sy2Rear straightConnected to 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 is input to the cluster analog sound mixing module;
the local audio input module is connected with the 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 system comprises a cluster analog sound mixing module, a left analog sound mixing module, a right analog sound mixing module and a voice signal LINEIN, wherein the output end of the cluster analog sound mixing module is connected with the audio input end of the cluster talkback module, and the voice signal LINEIN generated by the cluster talkback module is respectively connected with the input ends of the left analog sound mixing module and the right analog sound mixing module through the;
the local audio input module is also respectively connected with the right secondary analog audio mixing module and the left secondary analog 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 analog audio mixing module and the right secondary analog audio mixing module through the audio output end;
the output end of the right digital-to-analog conversion module passes through an analog switch Sy2And an analog switch SZ3The output end of the left digital-to-analog conversion module passes through an analog switch Sz2And an analog switch Sy3The via connection of (a);
the audio system also comprises a four-out-of-one selection switch, wherein the left channel audio DACL, the left channel mixed audio MIXL, the right channel audio DACR and the right channel mixed audio MIXR are all connected to the four-out-of-one selection switch, and the output end of the four-out-of-one selection switch is connected with the audio output module;
the voice call link between the cluster talkback module and the public network communication module/satellite communication module is as follows: an audio output channel of the trunking intercom module sequentially passes through the analog switch S8, the right analog sound mixing module and the right analog-to-digital conversion module 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 through the right digital sound mixing module, the right digital-to-analog conversion module, the analog switch S15, the right secondary analog sound mixing module, the analog switch S20 and the trunking analog sound mixing module in sequence, and meanwhile, the android system drives the PTT of the trunking talkback module to send the voice through the audio circuit control module.
2. The android platform-based left and right channel time-sharing control system of claim 1, wherein: the local audio input module includes a local MIC and a headset MIC.
3. The android platform-based left and right channel time-sharing control system of claim 2, wherein: the communication module comprises a 2G/3G/4G/5G module and a satellite communication module.
4. The android platform based left and right channel time sharing control system of claim 3, wherein: 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 an analog switch Sy4The 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.
CN201711089649.5A 2017-11-08 2017-11-08 Left and right sound channel time-sharing control system based on android platform Active CN107948402B (en)

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CN201781536U (en) * 2009-07-06 2011-03-30 中兴通讯股份有限公司 Communication device capable of performing three-way or multi-way calling simultaneously
CN106992025A (en) * 2017-05-22 2017-07-28 四川音创伟业科技有限公司 Two-way binaural recording device

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CN201781536U (en) * 2009-07-06 2011-03-30 中兴通讯股份有限公司 Communication device capable of performing three-way or multi-way calling simultaneously
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