CN210868137U - Conference host with acoustic feedback noise elimination digital equalization - Google Patents
Conference host with acoustic feedback noise elimination digital equalization Download PDFInfo
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Abstract
The utility model discloses a conference host with acoustic feedback noise elimination digital equalization, which comprises an echo elimination module, a feedback inhibition module and a digital audio processing module, wherein the digital audio processing module is provided with a multi-channel input interface and a multi-channel output interface and comprises a central controller and a digital audio matrix processor which are connected in sequence, the echo elimination module and the signal output interface of the feedback inhibition module are connected to the multi-channel signal input interface of the digital audio processing module, and the central controller is also connected with an erasable storage medium; through the design of the conference host, the echo cancellation and feedback suppression of the voice signals of the conference unit are realized, the programmable intelligent control of the conference unit and the digital audio media matrix processor can be realized through the central controller, and the noise reduction digital equalization and multi-channel automatic sound mixing can be realized through the digital audio matrix processor.
Description
Technical Field
The utility model relates to a conference system technical field especially relates to a take digital balanced meeting host computer of acoustic feedback noise elimination.
Background
With the exit of the conventional round table conference mode, the development of the digital conference system and the increasing requirement on the core content of the conference system by using audio and video in the market, in the modern conference, the conference is played by adopting a conference video system: the solution under the existing technical conditions is usually composed of a host, a plurality of conference units, a camera, an extended power supply, an external device, an external sound source and other components, wherein signals between systems adopt an analog + digital mode, namely, the audio frequency adopts balanced transmission, and the control adopts an RS485 bus; the camera automatically tracks the personnel when the microphone of the unit is opened by setting the relationship between the unit and the camera, the conference mode and the like through the host and editing the corresponding relationship between the participant and the conference unit in PC software; however, the existing conference systems are both analog and digital conference systems, the sound quality is easily interfered and easily distorted, and great problems are brought in use, meanwhile, as the modern conference is often large in space and numerous in number of people participating in the conference, a great number of sound pickup devices and sound transmission devices work simultaneously in a closed and open space, the problems of echo, noise and squeal caused by the sound quality in the conference process are also seriously influenced, and even a sound box or a power amplifier is burnt out due to over-strong signals under the serious condition; and frequent digital-to-analog conversion and analog-to-digital conversion processes of the sound signals often cause noise, and bad influence is caused on sound pickup and sound reproduction quality to a certain extent.
The patent of application No. CN201821305438.0 proposes a novel conference host, which includes a main control chip, a multi-channel voice signal input interface, a channel selector, an environmental noise filtering chip, an amplification unit with controllable amplification factor, an original volume detection unit, and a voice signal output interface; the multi-channel voice signal input interface is respectively connected with a plurality of input ends of the channel selector, the environmental noise filtering chip is connected with an output end of the channel selector, the environmental noise filtering chip is respectively connected with the amplifying unit and the original volume detecting unit, the amplifying unit is connected with the voice signal output interface, and the original volume detecting unit is used for detecting the original volume of the speaker and controlling the amplification factor of the amplifying unit according to the original volume; the utility model discloses a to the filtering of ambient noise when having optimized multichannel speech signal to a certain extent and having inputed, nevertheless it only focuses on the filtration noise and the amplification function of multichannel speech signal to realize not multi-functional integration such as video, pronunciation, and also for carrying out fine processing to the whistling and echo problem that appear in the meeting easily.
In order to solve the above technical problems, a conference host with an acoustic feedback noise cancellation digital equalization is needed to solve the existing technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a take digital balanced meeting host computer of acoustic feedback noise elimination can realize acoustic feedback and noise elimination and digital equilibrium of voice transmission under the prerequisite that satisfies modern meeting to the video function demand.
The utility model discloses a realize through following technical scheme.
A conference host with acoustic feedback noise elimination digital equalization comprises an echo elimination module, a feedback suppression module and a digital audio processing module, and is characterized in that the digital audio processing module is provided with a multi-channel input interface and a multi-channel output interface and comprises a digital audio matrix processor, the digital signal input interface of the digital audio matrix processor is connected to a control signal output interface of a central controller, the signal output interfaces of the echo elimination module and the feedback suppression module are connected to the multi-channel signal input interface of the digital audio processing module, and the central controller is further connected with an erasable storage medium.
In the above embodiment, it is preferable that the display device further comprises a control module, the control module includes a touch screen and a control key, the touch screen and the control key are connected to the microprocessor, and the signal output end of the microprocessor is connected to the control input end of the central controller and the signal input end of the screen display/indicator light, respectively.
In the above embodiment, preferably, the conference host is connected to the plurality of conference units via a bus, and realizes bidirectional data communication.
In the above embodiment, preferably, the digital signal input to the conference host via the bus is transmitted to the signal input interfaces of the echo cancellation module and the feedback suppression module.
In the foregoing embodiment, it is preferable that the audio processing device further includes a built-in power amplifier, the built-in power amplifier is a built-in digital power amplifier, and a signal input interface thereof is connected to a digital signal output interface of the digital audio matrix processor, and a signal output interface thereof is connected to the speaker through an audio line.
In the above embodiment, it is preferable that the apparatus further includes a video tracking host, the video tracking host signal input interface is connected to the digital signal output interface of the digital audio matrix processor, and the signal output interface is connected to the camera through a data line.
In the above embodiment, preferably, the erasable storage medium is a programmable memory, and the central controller is further connected with a memory and a flash memory as the storage medium.
In the foregoing embodiment, it is preferable that the digital audio matrix processing module further includes a D/a converter and a control signal output interface, wherein the digital audio matrix processor digital signal output interface and the control signal output interface are connected to the D/a converter and the control signal output interface, and the output ends of the D/a converter and the control signal output interface are multi-channel output interfaces.
In the above embodiment, preferably, the control signal output interface is RS282 or RS 485.
In the above embodiment, preferably, the multi-channel input interface is further connectable to an external source media digital voice signal output interface.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) the utility model integrates a built-in digital power amplifier, and does not need to be additionally connected with an external power amplifier, so that the layout and routing of the conference system are more simple and convenient;
2) the utility model integrates the video tracking host, and can realize the video positioning function under the condition of meeting the requirement of voice transmission;
3) the utility model integrates the echo cancellation module, the feedback suppression module and the digital audio matrix processor, and can effectively realize the functions of sound feedback suppression, noise elimination and digital equalization of multi-channel voice signals;
4) the utility model discloses erasable storage medium has been used for central controller can realize that built-in procedure is erasable, and then realizes the intelligent control able to programme.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the three-dimensional structure of the present invention when inserted into a motherboard module box;
fig. 2 is a schematic view of the three-dimensional structure of the display of the present invention.
In the figure: 1. a conference unit; 11. a microphone core; 12. a digital audio processor; 13. an equalization circuit; 14. A conference unit flash memory; 2. a conference host; 21. an echo cancellation module; 22. a feedback suppression module; 23. A central controller; 231. a memory; 232. flashing; 233. a programmable memory; 24. a digital audio matrix processor; 25. a video tracking host; 26. a digital power amplifier is arranged in the power amplifier; 27. a digital audio processing module; 28. a control module; 281. a touch screen; 282. a control key; 283. a microprocessor; 284. screen display/indicator lights.
Detailed Description
The technical solutions of the present invention using various embodiments will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments using the novelty, are within the scope of the invention without inventive step.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1, the utility model provides a take digital balanced meeting host computer of acoustic feedback noise cancellation, including echo cancellation module 21, feedback suppression module 22, central controller 23 and digital audio matrix treater 24, this meeting host computer receives the speech signal of meeting unit 1 transmission, and transmit to central controller 23's speech signal input interface through echo cancellation module 21 and feedback suppression module 22, central controller 23's speech output interface is connected to digital audio matrix treater 24's speech input interface, with the optimization work of accomplishing meeting speech signal acoustic feedback suppression, noise cancellation and digital balance.
The following are specific examples:
as shown in fig. 2, the conference unit 1 includes a microphone core 11, after a participant in the conference speaks, the microphone core 11 receives a voice signal, and performs analog-to-digital conversion through an a/D converter, and performs simple voice signal optimization inside the conference unit 1, a digital signal output port of the a/D converter is sequentially connected to a digital audio processor 12 and an equalizing circuit 13, and performs data exchange with a CPU built in the conference unit 1 to perform control of the conference unit 1, and simultaneously outputs the voice digital signal and controls an output interface through RS232/RS485 to connect to a bus and perform bidirectional communication; on the other hand, the conference unit 1 is internally provided with a CPU to carry out bidirectional signal communication with the conference unit flash memory 14, so as to realize the real-time recording function, and control signals are input into the conference unit 1 through an RS232/RS485 interface, so that the conference unit 1 can be controlled through a control key on the conference unit 1 and can also be controlled through a control signal input by the conference host 2 at a far end.
As shown in fig. 1, N conference units 1 are connected to a conference host 2 through a bus, so as to implement bidirectional communication between the conference units 1 and the conference host 2, and further implement additional control functions of the conference host 2 on the conference units 1, such as speaking mode switching, speaking closing and opening, voting initiation, and the like; because the conference place is open and a large amount of sound pickup equipment and loudspeaker equipment work simultaneously, echo is inevitably generated, meanwhile, the voice signal generated by the loudspeaker equipment is received by the sound pick-up equipment again, and howling can be synchronously generated, in order to avoid the influence caused by the above acoustic signals, the voice digital signals are output to the digital signal input interfaces of the echo cancellation module 21 and the feedback suppression module 23, and transmitted to the digital audio matrix processor 24 via the central controller 23, meanwhile, the single-channel voice input can not meet the requirements of people for the conference, the functions of voice input of a plurality of participants, multimedia voice input and sound mixing and the like are also necessary for the modern conference, therefore, besides the voice signal input of the conference unit 1, also a plurality of media voice signals are transmitted to the voice digital signal input interface of the digital audio matrix processor 24 through the central controller 23.
The central controller 23 outputs control signals to the conference units 1 and the digital audio matrix 24 to realize the start of multiple modes, for example, after the number of digital signals input into the central controller 23 reaches a limit number, the rest conference units 1 cannot receive sound; when the number of the digital signals input into the central controller 23 reaches the limit number, the newly added conference unit 1 can cause that the conference unit 1 at the beginning cannot receive the sound and automatically close the sound; channel switching is performed on the voice signal input into the digital audio matrix 24; controls and adjusts the mixing and equalizing effects of the voice signals input into the digital audio matrix 24. The computer program for switching the modes is stored in the memory 231, the flash memory 232 and the programmable memory 233, and the programmable memory 233 enables the central controller 23 to realize programmable intelligent control; in addition, the control module 28 outputs a control signal to be connected to the central controller 23, the control module 28 includes a touch screen 281 and control keys 282, an operator sets the conference host 2 through the touch screen 281 and the control keys 282, the microprocessor 283 outputs the control signal to the central controller 23 for setting, and the microprocessor 283 outputs the signal to the screen display/indicator 284 for realizing control and mode visualization, thereby optimizing operation experience.
The multi-channel voice digital signal is input to a digital audio matrix processor 24 to realize automatic sound mixing, signal equalization, voltage limit and noise gate processing, and the signal is output to a video tracking host 25 and a built-in digital power amplifier 26; the video tracking host 25 outputs a signal to the video tracking host 25 and controls a camera motor to operate to a preset angle when the conference unit 1 outputs a voice signal through presetting a list and a camera angle of each conference unit 1, so that a real-time camera tracking function is realized; meanwhile, the conference host 2 is also internally provided with a multi-channel digital power amplifier 26, so that the conference host 2 has the advantages of small volume, low cost, no need of debugging, convenient use, no need of matching a loudspeaker and the like, and is convenient for matching the conference host 2 and the loudspeaker; the voice signal output by the signal output interface of the digital audio matrix processor 24 is converted by the D/A sensor, and the synchronous transmission control signal is communicated by the RS232/RS485 interface, so as to realize the output and control functions of the far-end loudspeaker and the analog power amplifier.
The digital audio signal generation and transmission process is as follows: the N conference units 1 are connected with the conference host 2 through buses, so that networking data of the conference units 1 and the conference host 2 are transmitted in a bidirectional mode; the voice analog signal received by the microphone 11 is processed by the digital audio processor 2 and the equalizing circuit 13 under the control of the built-in CPU of the analog-to-digital conversion and conference unit 1 in sequence, and is output to the built-in CPU of the conference unit 1, and the built-in CPU of the conference unit 1 receives the control information from the host 2 through an RS232/RS485 interface and sends an audio signal transmission request; the central controller 23 of the conference host 2 realizes the programmability of a built-in computer program through a storage medium, realizes host control through the control module 28, and responds to an audio signal transmission request from the conference host 1; the received voice digital signal and the exogenous media voice signal are transmitted to a multi-channel voice signal input interface of a digital audio processing module 27, and are controlled by a central controller 23 to be transmitted to a voice signal input interface of a digital audio matrix processor 24 to realize the function processing of channel selection and switching, automatic sound mixing, voltage limitation, digital equalization and the like, the voice digital signal is transmitted to a multi-channel built-in digital power amplifier 26, and the digital signal is transmitted to a video tracking host computer 25 to realize the camera tracking function; meanwhile, the digital audio matrix processor 24 outputs a control signal and a voice analog signal after digital-to-analog conversion by the D/a converter, and realizes the functions of setting and controlling the far-end speaker device through signal communication.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the essence of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A conference host with acoustic feedback noise elimination digital equalization comprises an echo elimination module (21), a feedback suppression module (22) and a digital audio processing module (27), and is characterized in that the digital audio processing module (27) is provided with a multi-channel input interface and a multi-channel output interface and comprises a digital audio matrix processor (24), the control signal input interface of the digital audio matrix processor (24) is connected to the control signal output interface of a central controller (23), the signal output interfaces of the echo elimination module (21) and the feedback suppression module (22) are connected to the multi-channel signal input interface of the digital audio processing module (27), and the central controller (23) is further connected with an erasable storage medium.
2. The conference host with acoustic feedback noise cancellation digital equalization as claimed in claim 1, further comprising a control module (28), wherein the control module (28) comprises a touch screen (281) and control keys (282), the touch screen (281) and the control keys (282) are connected with a microprocessor (283), and the signal output end of the microprocessor (283) is respectively connected with the control input end of the central controller (23) and the signal input end of the screen display/indicator lamp (284).
3. The conference host with the function of acoustic feedback noise cancellation and digital equalization according to claim 1 is characterized in that the conference host (2) is connected with a plurality of conference units (1) through a bus and realizes bidirectional data communication.
4. The conferencing host with acoustic feedback noise cancellation digital equalization of claim 3, wherein the digital signal input to the conferencing host (2) via the bus is passed to the signal input interface of the echo cancellation module (21) and the feedback suppression module (22).
5. The conference host with acoustic feedback noise cancellation digital equalization as claimed in claim 1, further comprising a built-in power amplifier, wherein the built-in power amplifier is a built-in digital power amplifier (26), and its signal input interface is connected to the digital signal output interface of the digital audio matrix processor (24), and its signal output interface is connected to a speaker through an audio line.
6. The conference host with the function of acoustic feedback noise elimination and digital equalization as claimed in claim 1, further comprising a video tracking host (25), wherein the signal input interface of the video tracking host (25) is connected to the digital signal output interface of the digital audio matrix processor (24), and the signal output interface thereof is connected with the camera through a data line.
7. The conference host with acoustic feedback noise cancellation digital equalization as claimed in claim 1, wherein the erasable storage medium is a programmable memory (233), and the central controller (23) is further connected with a memory (231) and a flash memory (232) as storage media.
8. The conference host with acoustic feedback noise cancellation digital equalization as claimed in claim 1, wherein the digital audio processing module (27) further comprises a D/a converter and a control signal output interface, wherein the digital audio matrix processor (24) digital signal output interface and the control signal output interface are connected to the D/a converter and the control signal output interface, and the D/a converter and the control signal output interface output end is a multi-channel output interface.
9. The conference host with acoustic feedback noise cancellation digital equalization as claimed in claim 8, wherein said control signal output interface is RS232 or RS 485.
10. The conference host with acoustic feedback noise cancellation digital equalization as claimed in claim 1, wherein said multi-channel input interface is further connectable to an external source media digital voice signal output interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115119111A (en) * | 2022-06-21 | 2022-09-27 | 世邦通信股份有限公司 | Digital conference implementation method and system, intelligent device and digital conference system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115119111A (en) * | 2022-06-21 | 2022-09-27 | 世邦通信股份有限公司 | Digital conference implementation method and system, intelligent device and digital conference system |
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