CN209845279U - Audio feedback and noise suppression module based on DSP - Google Patents
Audio feedback and noise suppression module based on DSP Download PDFInfo
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- CN209845279U CN209845279U CN201920349998.4U CN201920349998U CN209845279U CN 209845279 U CN209845279 U CN 209845279U CN 201920349998 U CN201920349998 U CN 201920349998U CN 209845279 U CN209845279 U CN 209845279U
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Abstract
The utility model discloses an audio feedback and noise suppression module based on DSP, include: the device comprises a power supply, a DSP chip, an audio coding and decoding chip, a program memory and an encryption chip, wherein the DSP chip comprises a data transmission EDMA module, a data transmission McASP module and a data transmission I2S module. In this way, the utility model discloses audio feedback and noise suppression module based on DSP realize functions such as acoustic feedback, noise suppression and audio through adopting high performance floating point DSP, have very strong acoustic feedback suppression and noise suppression function, to language class sound amplification, can be applied to multi-functional room, meeting room, report room, training center, command center and ladder classroom etc. need the occasion of on-the-spot public address, have extensive market prospect in audio feedback and noise suppression module's based on DSP popularization.
Description
Technical Field
The utility model relates to the field of communication, especially, relate to an audio feedback and noise suppression module based on DSP.
Background
The audio processing module applied to occasions needing on-site sound amplification, such as a multifunctional hall, a conference room, a report hall, a training center, a command center, a step classroom and the like in the market at present basically has a plurality of defects: the feedback inhibition ability is poor, the noise inhibition ability is weak, and the reverberation discrimination ability cannot be achieved, so that the phenomena of howling, echo, noise, sound distortion and the like can occur on the scene.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem who mainly solves provides an audio feedback and noise suppression module based on DSP, realize acoustic feedback through adopting high performance floating point DSP, functions such as noise suppression and audio, have very strong acoustic feedback suppression and noise suppression function, to language class sound amplification, can be applied to multi-functional room, the meeting room, report the room, training center, the occasion that command center and ladder classroom etc. need on-the-spot public address, there is extensive market prospect in audio feedback and noise suppression module's based on DSP popularization.
In order to solve the technical problem, the utility model provides an audio feedback and noise suppression module based on DSP, include: a power supply, a DSP chip, an audio coding and decoding chip, a program memory and an encryption chip,
the power supply is electrically connected with and supplies power to the DSP chip, the audio coding and decoding chip, the program memory and the encryption chip,
the DSP chip comprises a data transmission EDMA module, a data transmission McASP module and a data transmission I2S module, the audio coding and decoding chip collects audio data to perform AD processing, the audio coding and decoding chip is in communication connection with the DSP chip through the data transmission I2S module and transmits the audio data to the data transmission McASP module, the data transmission McASP module generates an event signal after receiving the audio data and transmits the event signal to the data transmission EDMA module to trigger the data transmission EDMA module to copy or move the data, the data transmission EDMA module transmits the copied or moved audio data to the data transmission McASP module, and the data transmission McASP module transmits the audio data to the audio coding and decoding chip through the data transmission I2S module for external playing,
the program memory is in communication connection with the DSP chip for data storage, and the encryption chip is in communication connection with the DSP chip for data encryption.
In a preferred embodiment of the present invention, the DSP chip is a TMS320C6746 chip.
In a preferred embodiment of the present invention, the audio codec chip is a TLV320AIC310 chip.
In a preferred embodiment of the present invention, the audio codec chip is externally connected to an MIC or a speaker.
The utility model has the advantages that: the utility model discloses audio feedback and noise suppression module based on DSP realize functions such as acoustic feedback, noise suppression and audio through adopting high performance floating point DSP, have very strong acoustic feedback suppression and noise suppression function, to language class public address, can be applied to occasions that need on-the-spot public address such as multi-functional room, meeting room, report room, training center, command center and ladder classroom, have extensive market prospect in the popularization of audio feedback and noise suppression module based on DSP.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural diagram of a preferred embodiment of the audio feedback and noise suppression module based on DSP of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
a DSP-based audio feedback and noise suppression module, comprising: a power supply, a DSP chip, an audio coding and decoding chip, a program memory and an encryption chip,
the power supply is electrically connected with and supplies power to the DSP chip, the audio coding and decoding chip, the program memory and the encryption chip,
the DSP chip comprises a data transmission EDMA module, a data transmission McAP module and a data transmission I2S module, the audio coding and decoding chip collects audio data to perform AD processing, the audio coding and decoding chip is in communication connection with the DSP chip through the data transmission I2S module and transmits the audio data to the data transmission McAP module, the data transmission McAP module generates an event signal after receiving the audio data and transmits the event signal to the data transmission EDMA module to trigger the data transmission EDMA module to copy or move the data, the data transmission EDMA module transmits the copied or moved audio data to the data transmission McAP module, the data transmission McAP module transmits the audio data to the audio coding and decoding chip through the data transmission I2S module to be externally displayed, thereby realizing the functions of noise filtering, howling inhibition, processing, audio data high fidelity and the like,
the program memory is in communication connection with the DSP chip for data storage, and the encryption chip is in communication connection with the DSP chip for data encryption.
Preferably, the DSP chip is a TMS320C6746 chip.
Preferably, the audio codec chip is a TLV320AIC310 chip.
Preferably, the audio codec chip is externally connected with an MIC or a speaker.
The utility model discloses a performance parameter:
the CPU main frequency of the module is more than 200MHz, floating point/fixed point algorithm is supported, and the temperature range is-10 to 45 ℃;
sampling rate 8KHz narrow-band voice, 16KHz wide-band voice, both sampling rate configurations are supported;
the frequency range is 50Hz ~ 8 KHz;
the data processing is 16bits/24bits A/D-D/A digital signal bit width;
5.0V/3.3V power supply: the analog 5.0V power supply and the digital 3.3V power supply are separately supplied;
input/output interface:
(1) audio _ In: the local microphone input signal can be accessed to an Audio _ in port after being amplified; the input voltage range of the audio frequency analog interface is 0-2.8V Vpp;
(2) the Out +/Out-output positive/negative terminal is used for balancing output and is connected with a post-stage differential conversion single-circuit to be converted into a single-circuit signal;
(3) the Audio _ Out is subjected to howling suppression processing, the output of the Audio _ Out after post-stage differential conversion can be amplified and then connected with sound box equipment, and the output voltage range of the Audio analog interface is 0-2.8V Vpp;
testing an interface: inputting: can directly connect the microphone externally, output: the loudspeaker box can be directly connected;
the module background noise signal-to-noise ratio is greater than 80 dB;
and (4) protective measures: the encryption chip is used for encrypting the program code of the DSP processor core;
anti-electromagnetic interference capability: and the device is electromagnetic compatible with equipment in an external environment and does not interfere with each other.
The audio coding and decoding chip adopts TLV320AIC310 audio coding and decoding chip, the maximum sampling rate of the chip can support 96kbps sampling rate, the audio input and output is 2.8V Vpp, and the design requirement of the algorithm module can be met;
the DSP adopts TI DSP TMS320C6746, and the chip can meet the algorithm implementation requirement according to evaluation;
the DSP is externally connected with an SPI flash chip and used as a program memory for program starting;
according to the algorithm implementation of the DSP and the program space requirement, software in board design uses L2 ram inside the DSP as a program running ram, and ram256kbyte inside the TMS320C6746 can meet the program running requirement;
the power supply design board adopts a 5V power supply interface of the board pin header to supply power, and can also supply power through 3.3V of the board pin header;
the audio board card is provided with audio input, audio output, MIC and audio box input standard interfaces, and facilitates function testing.
The utility model discloses audio feedback and noise suppression module's beneficial effect based on DSP is:
the high-performance floating-point DSP is adopted to realize the functions of sound feedback, noise suppression, sound effect and the like, has very strong sound feedback suppression and noise suppression functions, can be applied to occasions needing field sound amplification such as a multifunctional hall, a conference room, a report hall, a training center, a command center, a step classroom and the like aiming at language sound amplification, and has the main functional characteristics that:
(1) feedback inhibition: howling caused by feedback can be effectively suppressed, the sound is not distorted, and no field configuration is needed;
(2) noise suppression: local noise can be effectively suppressed, and voice is kept undistorted;
(3) the interface and debugging are convenient, and the marketing period of the product can be greatly shortened;
the utility model discloses under the condition that the cost does not have the increase almost, improved the throughput of system greatly, further perfect and produced the property ability for the product more has the price/performance ratio.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (4)
1. An audio feedback and noise suppression module based on a DSP, comprising: a power supply, a DSP chip, an audio coding and decoding chip, a program memory and an encryption chip,
the power supply is electrically connected with and supplies power to the DSP chip, the audio coding and decoding chip, the program memory and the encryption chip,
the DSP chip comprises a data transmission EDMA module, a data transmission McASP module and a data transmission I2S module, the audio coding and decoding chip collects audio data to perform AD processing, the audio coding and decoding chip is in communication connection with the DSP chip through the data transmission I2S module and transmits the audio data to the data transmission McASP module, the data transmission McASP module generates an event signal after receiving the audio data and transmits the event signal to the data transmission EDMA module to trigger the data transmission EDMA module to copy or move the data, the data transmission EDMA module transmits the copied or moved audio data to the data transmission McASP module, and the data transmission McASP module transmits the audio data to the audio coding and decoding chip through the data transmission I2S module for external playing,
the program memory is in communication connection with the DSP chip for data storage, and the encryption chip is in communication connection with the DSP chip for data encryption.
2. The DSP based audio feedback and noise suppression module of claim 1, wherein the DSP chip is a TMS320C6746 chip.
3. The DSP based audio feedback and noise suppression module of claim 1, wherein the audio codec chip is a TLV320AIC310 chip.
4. The DSP-based audio feedback and noise suppression module according to claim 1, wherein the audio codec chip is externally connected to the MIC or the speaker.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920349998.4U CN209845279U (en) | 2019-03-19 | 2019-03-19 | Audio feedback and noise suppression module based on DSP |
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| CN201920349998.4U CN209845279U (en) | 2019-03-19 | 2019-03-19 | Audio feedback and noise suppression module based on DSP |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586527A (en) * | 2020-04-28 | 2020-08-25 | 重庆西原楼宇自动化工程有限公司 | Intelligent voice processing system |
| CN112071132A (en) * | 2020-09-03 | 2020-12-11 | 北京竞业达数码科技股份有限公司 | Audio and video teaching equipment and intelligent teaching system |
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2019
- 2019-03-19 CN CN201920349998.4U patent/CN209845279U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586527A (en) * | 2020-04-28 | 2020-08-25 | 重庆西原楼宇自动化工程有限公司 | Intelligent voice processing system |
| CN112071132A (en) * | 2020-09-03 | 2020-12-11 | 北京竞业达数码科技股份有限公司 | Audio and video teaching equipment and intelligent teaching system |
| CN112071132B (en) * | 2020-09-03 | 2021-08-17 | 北京竞业达数码科技股份有限公司 | Audio and video teaching equipment and intelligent teaching system |
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