CN217563643U - Full duplex communication system of public network talkback - Google Patents
Full duplex communication system of public network talkback Download PDFInfo
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- CN217563643U CN217563643U CN202220505217.8U CN202220505217U CN217563643U CN 217563643 U CN217563643 U CN 217563643U CN 202220505217 U CN202220505217 U CN 202220505217U CN 217563643 U CN217563643 U CN 217563643U
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Abstract
The utility model provides a full duplex talk system is talkbacked to public network, include: the system comprises a plurality of duplex talkback devices and a server, wherein the duplex talkback devices are communicated with each other through the server; each duplex intercom device comprises a shell, wherein a high-gain antenna is arranged on one side above the shell, a microphone is arranged on the other side above the shell, a display screen is arranged at the front end of the shell, and a loudspeaker is arranged below the display screen; a control circuit board and a wireless receiving/sending module are arranged in the shell, an echo noise suppression unit is connected between the microphone and the loudspeaker, and an AMR/OPUS coding and decoding unit is connected between the echo noise suppression unit and the wireless receiving/sending module. The utility model discloses a combining the peculiar design of aspects such as hardware architecture, equipment circuit and server framework, having realized the technique and the application that the intercom can duplex conversation, having realized the effective suppression of echo effect, its hardware cost is lower, the circuit is realized simpler, can show the speech quality who improves intercom.
Description
Technical Field
The utility model relates to a communication technology field of talkbacking, concretely relates to can realize full duplex talkbacking public network talkbacking full duplex communication system of conversation.
Background
The interphone (two way radio) is used as a two-way mobile communication tool, can carry out communication without any network support, does not generate telephone charge, and is suitable for occasions with relatively fixed and frequent communication.
Most of the existing interphone talkback technologies are simplex (receiving/transmitting can not be carried out simultaneously), most of the existing interphones are half-duplex talkbacks, the existing interphones enable a transmitter and a receiver to work on one frequency and only can carry out single transmission, and thus the existing interphones can not carry out simultaneous talking and listening and can only carry out one task independently, and the existing interphones are inconvenient to use and can also slow down information receiving due to time delay.
In addition, some talkbacks have echo phenomenon at present, which seriously affects the communication quality.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a full duplex talk system is talkbacked to public network, its peculiar design through aspects such as combining intercom hardware architecture, equipment circuit and server framework has realized that the intercom can duplex conversation (receiving and dispatching can go on simultaneously) technique and application, has reached the two innovations of talkbacking technique and application.
In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
a public network talkback full duplex communication system, comprising: the system comprises a plurality of duplex talkback devices and a server, wherein the plurality of duplex talkback devices are communicated with each other through the server; each duplex intercom device comprises a casing, wherein a high-gain antenna is arranged on one side above the casing, a microphone is arranged on the other side above the casing, a display screen is arranged at the front end of the casing, and a loudspeaker is arranged below the display screen; the casing is internally provided with a control circuit board for controlling the whole system and a wireless receiving/sending module for signal transmission, the wireless receiving/sending module is externally connected with the duplex intercom device or embedded in the duplex intercom device, the microphone is connected with the control circuit board through a preamplifier circuit, the loudspeaker is connected with the control circuit board through a power amplifier circuit, and the control circuit board is communicated with the server through the wireless receiving/sending module; an echo noise suppression unit is connected between the microphone and the loudspeaker, and an AMR/OPUS coding and decoding unit is connected between the echo noise suppression unit and the wireless receiving/sending module.
According to a further scheme, when the two duplex intercom devices perform duplex conversation, the server and the first duplex intercom device establish two UDP channels, the first UDP channel is used for collecting audio data forwarded by the first duplex intercom device and forwarding the audio data to the second duplex intercom device, and the second UDP channel is used for collecting audio data forwarded by the second duplex intercom device and forwarding the audio data to the first duplex intercom device.
In a further aspect, the AMR/OPUS codec unit includes: the voice encoder is used for carrying out compression encoding on the audio data and transmitting the encoded voice data to the air interface protocol layer; and the voice decoder is used for decoding the voice data, wherein the air interface protocol layer transmits the voice data to the voice decoder, and the voice decoder completes decoding and transmits the decoded voice data to the loudspeaker.
In a further scheme, the control circuit board comprises an ARM processor, and an RT1060 chip of the ARM processor is connected with an FM-1288-GA1 chip of the echo noise suppression unit through an IIC bus.
The echo noise suppression unit adopts an FM-1288-GA1 chip, wherein 23 pins and 24 pins of the FM-1288-GA1 chip are respectively connected to an IIC interface of the RT1060 chip, an analog audio output interface of the FM-1288-GA1 chip is connected with the loudspeaker through the power amplification circuit, an analog audio input interface of the FM-1288-GA1 chip is connected to the microphone through the pre-amplification circuit, and an analog audio input interface of the FM-1288-GA1 chip is connected with the AMR/OPUS codec unit.
In a further scheme, an API interface and a physical interface are embedded in the duplex intercom device.
In a further scheme, a frequency band adjusting button is arranged on one side, close to the microphone, above the machine shell.
Therefore, it is obvious that traditional intercom only simplex is used, in order to talkback for intercom extension duplex, the utility model adopts the above technical scheme, provide one kind can duplex technique and hardware of talkbacking, put microphone and speaker at the different planes of equipment, can open the use simultaneously through setting up the receiving/sending dual channel, can make duplex intercom receive and convey when the conversation, realize full duplex function of talkbacking. And the echo is suppressed effectively by adopting the design scheme of a hardware circuit for echo suppression and noise processing on the voice signal transmission channel, so that the noise in the conversation process is reduced, the echo interference in the conversation process is reduced, and the voice conversation is clearer. Compared with the design method for carrying out digital echo cancellation by using a built-in DSP adopted by other products, the design method has the advantages of lower hardware cost, simpler circuit realization and capability of obviously improving the conversation quality of the intercom device. When the microphone is used, the microphone pickup and the loudspeaker broadcast are firstly turned on simultaneously, and then the echo noise suppression processing of the pickup and the broadcast enables the application to be very smooth, clear in sound and stable in function. Therefore, a new application, namely duplex conversation, is added to the interphone equipment.
Therefore, the utility model discloses can give user new function and experience in the communication field of talkbacking, further improve the applied scene of intercom and user's cover face, let technique and application realize perfect combination to can effectual solution echo bad phenomenon, improve speech quality greatly.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the public network intercom full-duplex communication system of the present invention.
Fig. 2 is a schematic diagram of an embodiment of the present invention, which is a full duplex communication system for public network intercom.
Fig. 3 is a schematic circuit diagram of an echo noise suppression unit in an embodiment of a public network intercom full-duplex communication system of the present invention.
Fig. 4 is a schematic diagram of a device a and a device B in an embodiment of a public network intercom full-duplex communication system performing duplex communication.
The reference numbers indicate: the system comprises a casing 1, a high-gain antenna 2, a microphone 3, a display screen 4, a loudspeaker 5, a control circuit board 10, a pre-amplification circuit 11, a power amplification circuit 12, a wireless receiving/sending module 20, an echo noise suppression unit 30, an AMR/OPUS coding and decoding unit 40, a duplex intercom 100 and a server 200
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, a public network intercom full-duplex communication system includes a plurality of duplex intercom devices 100 and a server 200, wherein the plurality of duplex intercom devices 100 communicate with each other through the server 200.
In this embodiment, each duplex intercom device 100 includes a casing 1, a high-gain antenna 2 is disposed on one side above the casing 1, a microphone 3 is disposed on the other side above the casing 1, a display screen 4 is installed at the front end of the casing 1, a speaker 5 is disposed below the display screen 4, and a frequency band adjusting button (not shown) is disposed on one side above the casing 1 close to the microphone 3. It can be seen that the microphone 3 and the speaker 5 are structurally designed to be different planes, which can physically reduce the interference of playing on sound pickup.
In this embodiment, a control circuit board 10 for controlling the whole system and a wireless receiving/transmitting module 20 for signal transmission are disposed in the housing 1, the wireless receiving/transmitting module 20 is externally connected to the duplex intercom device 100 or embedded in the duplex intercom device 100, the microphone 3 is connected to the control circuit board 10 through the preamplifier circuit 11, the speaker 5 is connected to the control circuit board 10 through the power amplifier circuit 12, and the control circuit board 10 communicates with the server 200 through the wireless receiving/transmitting module 20;
in the present embodiment, an echo suppressing unit 30 is connected between the microphone 3 and the speaker 5, and an AMR/OPUS codec unit 40 is connected between the echo suppressing unit 30 and the wireless receiving/transmitting module 20.
When the two duplex intercom devices 100 perform duplex conversation, the server 200 establishes two UDP channels with the first duplex intercom device 100, the first UDP channel is used for acquiring the audio data forwarded by the first duplex intercom device 100 and forwarding the audio data to the second duplex intercom device 100, and the second UDP channel is used for acquiring the audio data forwarded by the second duplex intercom device 100 and forwarding the audio data to the first duplex intercom device 100.
In this embodiment, the AMR/OPUS codec unit 40 includes:
and the voice encoder is used for carrying out compression encoding on the audio data and transmitting the encoded voice data to the air interface protocol layer.
And the voice decoder is used for decoding the voice data, wherein the air interface protocol layer transmits the voice data to the voice decoder, and the voice decoder completes decoding and transmits the decoded voice data to the loudspeaker 5.
In this embodiment, the control circuit board 10 includes an ARM processor, and an RT1060 chip of the ARM processor is connected to an FM-1288-GA1 chip of the echo noise suppression unit 30 through an IIC bus.
Specifically, as shown in fig. 3, the echo noise suppressing unit 30 employs an FM-1288-GA1 chip, pins 23 and 24 of the FM-1288-GA1 chip are respectively connected to the IIC interface of the RT1060 chip, the analog audio output interface of the FM-1288-GA1 chip is connected to the speaker 5 through the power amplifier circuit 12, and the analog audio input interface of the FM-1288-GA1 chip is connected to the analog audio input interface of the microphone 3, the FM-1288-GA1 chip through the pre-amplifier circuit 11 and connected to the AMR/OPUS codec unit 40.
Further, the duplex intercom device 100 is embedded with an API interface and a physical interface.
Therefore, the opening of the receiving/transmitting double channels needs to be supported from the architecture design from the software and hardware platform, so that the starting is possible, the original technology only needs one thing to achieve the capacity of dual-core processing, and the duplex target is achieved.
In practical applications, as shown in fig. 4, the first duplex intercom device 100 is defined as an a device, the second duplex intercom device 100 is defined as a B device, the first UDP channel is defined as UDP1, and the second UDP channel is defined as UDP2. When the A and B devices carry out duplex talkback, the A and B devices send own voice to each other and play the voice sent by the other side at the same time.
When the device A and the device B carry out duplex communication, a double UDP channel is established between the server 200 and the device, for the device A, the UDP1 is responsible for collecting the audio data coded and packaged by the device A and forwarding the audio data to the device B, the UDP2 is responsible for collecting the data coded and packaged by the device B and forwarding the data to the device A, the operation is carried out on the device A and the device B at the same time, and thus the server 200 supports mutual forwarding of duplex data.
A. B, the equipment simultaneously opens pcm sound pickup and pcm playing interfaces, simultaneously establishes UDP1 and UDP2 data bi-pass, and continuously collects user voice, codes and packages the user voice and sends the user voice to the server 200 through UDP 1; the playing component receives the audio data of the user at the other side from the server 200UDP2 in real time, unpacks and decodes the audio data, and calls a physical interface to play the audio data.
Furthermore, the echo noise suppression processing is needed during pickup and playing, the problem of echo superposition noise of own sound is avoided, the continuous interactive processing of data is realized, the sound sent by the user of the other party can be listened to while the user speaks, pickup and playing of the scene are clear to the greatest extent, and the voice restoration degree is high, so that the duplex capability is increased for interphone communication, and the application scene and the user coverage are increased.
It is thus clear that traditional intercom only simplex uses, in order to say for intercom extension duplex, the utility model adopts the above technical scheme, provide one kind can duplex technique and hardware of talkbacking, put microphone 3 and speaker 5 at the different planes of equipment, can open the use simultaneously through setting up receiving/sending dual channel, can make duplex intercom device 100 receive and convey in the conversation, realize full duplex function of talkbacking. And the echo is suppressed effectively by adopting the design scheme of a hardware circuit for echo suppression and noise processing on the voice signal transmission channel, so that the noise in the conversation process is reduced, the echo interference in the conversation process is reduced, and the voice conversation is clearer. Compared with the design method for carrying out digital echo cancellation by using a built-in DSP (digital signal processor) adopted by other products, the design method has the advantages of lower hardware cost and simpler circuit realization, and can obviously improve the conversation quality of the intercom device. When the microphone is used, the pickup of the microphone 3 and the broadcasting of the loudspeaker are firstly opened simultaneously, and then the echo noise suppression processing of the pickup and the broadcasting also ensures that the application is very smooth, the sound is clear and the function is stable. Therefore, a new application, namely duplex communication, is added to the interphone equipment.
Therefore, the utility model discloses can give user's new function and experience in the communication field of talkbacking, further improve the applied scene of intercom and user's cover face, let technique and application realize perfect combination to can effectual solution echo bad phenomenon, improved speech quality greatly.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.
Claims (7)
1. A public network talkback full duplex communication system is characterized by comprising:
the system comprises a plurality of duplex talkback devices and a server, wherein the plurality of duplex talkback devices are communicated with each other through the server;
each duplex intercom device comprises a casing, wherein a high-gain antenna is arranged on one side above the casing, a microphone is arranged on the other side above the casing, a display screen is arranged at the front end of the casing, and a loudspeaker is arranged below the display screen;
the casing is internally provided with a control circuit board for controlling the whole system and a wireless receiving/sending module for signal transmission, the wireless receiving/sending module is externally connected with the duplex intercom device or embedded in the duplex intercom device, the microphone is connected with the control circuit board through a preamplifier circuit, the loudspeaker is connected with the control circuit board through a power amplifier circuit, and the control circuit board is communicated with the server through the wireless receiving/sending module;
an echo noise suppression unit is connected between the microphone and the loudspeaker, and an AMR/OPUS coding and decoding unit is connected between the echo noise suppression unit and the wireless receiving/sending module.
2. The public network intercom full-duplex communication system according to claim 1, wherein:
when the two duplex talkback devices carry out duplex conversation, the server and the first duplex talkback device establish two UDP channels, the first UDP channel is used for collecting audio data forwarded by the first duplex talkback device and forwarding the audio data to the second duplex talkback device, and the second UDP channel is used for collecting audio data forwarded by the second duplex talkback device and forwarding the audio data to the first duplex talkback device.
3. The public network talkback full duplex communication system according to claim 1, wherein:
the AMR/OPUS codec unit includes:
the voice encoder is used for carrying out compression encoding on the audio data and transmitting the encoded voice data to the air interface protocol layer;
and the voice decoder is used for decoding the voice data, wherein the air interface protocol layer transmits the voice data to the voice decoder, and the voice decoder completes decoding and transmits the decoded voice data to the loudspeaker.
4. The public network talkback full duplex communication system according to claim 1, wherein:
the control circuit board comprises an ARM processor, and an RT1060 chip of the ARM processor is connected with an FM-1288-GA1 chip of the echo noise suppression unit through an IIC bus.
5. The public network talkback full duplex communication system according to claim 4, wherein:
the echo noise suppression unit adopts an FM-1288-GA1 chip, 23 pins and 24 pins of the FM-1288-GA1 chip are respectively connected to an IIC interface of the RT1060 chip, an analog audio output interface of the FM-1288-GA1 chip is connected with the loudspeaker through the power amplification circuit, an analog audio input interface of the FM-1288-GA1 chip is connected to the microphone through the pre-amplification circuit, and an analog audio input interface of the FM-1288-GA1 chip is connected with the AMR/OPUS codec unit.
6. The public network talkback full duplex communication system according to any one of claims 1 to 5, wherein:
and an API (application program interface) and a physical interface are embedded in the duplex intercom device.
7. The public network talkback full duplex communication system according to any one of claims 1 to 5, wherein:
and a frequency band adjusting button is arranged on one side, close to the microphone, above the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220505217.8U CN217563643U (en) | 2022-03-08 | 2022-03-08 | Full duplex communication system of public network talkback |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220505217.8U CN217563643U (en) | 2022-03-08 | 2022-03-08 | Full duplex communication system of public network talkback |
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| CN217563643U true CN217563643U (en) | 2022-10-11 |
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| CN202220505217.8U Active CN217563643U (en) | 2022-03-08 | 2022-03-08 | Full duplex communication system of public network talkback |
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Effective date of registration: 20221110 Address after: 710,076 Room 1801, Block A, Greenland Linghai Building, No. 6, Jinye Road, High tech Zone, Xi'an, Shaanxi Patentee after: XI'AN FENGYU INFORMATION TECHNOLOGY Co.,Ltd. Address before: 710000 room 1801, 18 / F, unit 1, building 1, Greenland Central Plaza - territorial sea block AB, No. 1, Jinye Road, Xi'an, Shaanxi Patentee before: Xi'an shijiusui Information Technology Co.,Ltd. |
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