CN209914051U

CN209914051U - Audio DSP module

Info

Publication number: CN209914051U
Application number: CN201920696716.8U
Authority: CN
Inventors: 唐武平; 游从宝; 莫壮晓; 邓曼
Original assignee: Shenzhen Zhijie Core Technology Co Ltd
Current assignee: Shenzhen Zhijie Core Technology Co Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-01-07
Anticipated expiration: 2029-05-15

Abstract

The utility model relates to an audio DSP module, it includes signal reception module, noise filtering module and signal output module, signal reception module has multichannel signal input port in order to receive signal, signal output module is equipped with USB signal output port in order to change and output signal, noise filtering module carries out echo cancellation in order to obtain pure signal to the signal of input, signal reception module with noise filtering module both way junction is so that signal both way transmission, signal reception module with signal output module links to each other. The module adopts a programmable DSP kernel, supports stereo earphone output, has high signal-to-noise ratio and provides high-fidelity audio output; and supports up to multi-path analog/digital MIC input, so that the exposer is completely separated from the traditional handheld microphone, headset, hanging microphone and the like, great convenience is brought to the exposer, and the application prospect is wide.

Description

Audio DSP module

Technical Field

The utility model relates to an electronic information technical field, concretely relates to audio frequency DSP module.

Background

In the prior art, a microphone is generally a near-speaking microphone, only one microphone is embedded to collect voice, a speaker needs to be close to the microphone to effectively pick up the voice, however, if the distance between the speaker and the near-speaking microphone exceeds a certain distance, the collected voice signal is weak. In addition, most of the conventional microphones are hand-held, collar-clip type and ear microphone type, which can provide uncomfortable feeling for the speaker.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for an audio DSP module that can allow a speaker to be completely detached from a conventional handheld microphone, headset or boom microphone.

The utility model provides an audio DSP module, its includes signal reception module, noise filter module and signal output module, signal reception module has multichannel signal input port in order to receive signal, signal output module is equipped with USB signal output port in order to change and output signal, noise filter module is used for carrying out echo cancellation to the signal of input and obtains pure signal, signal reception module with noise filter module both way junction is so that signal both way transmission, signal reception module with signal output module links to each other.

Preferably, the signal receiving module has a WM8281 chip, and the WM8281 chip has a multi-channel analog/digital MIC signal input terminal to input a sound signal from a microphone and converts the input sound signal into an electric signal.

Preferably, the signal receiving module is provided with an IIS interface, and the IIS interface is connected with the signal output module.

Preferably, the signal receiving module is provided with an SPI interface, and the SPI interface is bidirectionally connected to the noise filtering module.

Preferably, the noise filtering module has a PIC16F18325 chip for performing radio frequency noise filtering, and the SPI interface is connected to the PIC16F18325 chip.

Preferably, the signal output module has an SSS1629 chip, and the IIS interface is connected to the SSS1629 chip.

Preferably, the SSS1629 chip has a USB output interface for converting and outputting the IIS signal to a USB signal.

Further, the noise filtering module is provided with a Norflash memory to write and store an application program, and the Norflash memory is connected with the PIC16F18325 chip.

Further, the signal output module has an audio parameter storage unit to store audio parameter configuration data, and the audio parameter storage unit is connected to the SSS1629 chip.

Further, the SPI interface is a four-wire serial bus interface, and is a master/slave structure.

In the audio DSP module, the module adopts a DSP core, supports the functions of multi-microphone array, high-performance echo cancellation and the like, supports stereo earphone output, has high signal-to-noise ratio and provides high-fidelity audio output; and supports multipath analog/digital MIC input, so that the exponents are completely separated from the traditional handheld microphones, headsets, microphones and the like, great convenience is brought to the exponents, and the application prospect is wide.

Drawings

Fig. 1 is a schematic diagram of the modules of the WM8281 audio DSP module according to the embodiment of the present invention.

Fig. 2 is a schematic diagram of the specific structure of each module of the WM8281 audio DSP module according to the embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and drawings.

Please refer to fig. 1 and fig. 2, which illustrate an audio DSP module 100 according to an embodiment of the present invention, including a signal receiving module 1, a noise filtering module 2 and a signal output module 3, where the signal receiving module 1 has a multi-channel signal input port 12 for receiving signals in a long distance and a wide range. The signal output module 3 is provided with a USB signal output port 32 for converting and outputting signals, the noise filtering module 2 is used for carrying out echo cancellation on input signals to obtain pure signals, the signal receiving module 1 is connected with the noise filtering module 2 in a two-way mode to enable signals to be transmitted in a two-way mode, and the signal receiving module 1 is connected with the signal output module 3.

Preferably, the signal receiving module 1 has a WM8281 chip 11, and the WM8281 chip 11 has a multi-channel analog/digital MIC signal input end 12 for inputting the sound signal from the microphone and converting the input sound signal into an electrical signal, and preferably, in the embodiment of the present invention, up to four channels of sound signals from the microphone are simultaneously input at most.

Preferably, the signal receiving module 1 is provided with an IIS interface 14, the IIS is provided with a clock and a frame selection, two data lines can be used for transmitting digital audio data between devices in the system, and the IIS interface 14 is connected with the signal output module 3.

Preferably, the signal receiving module 1 and the noise filtering module 3 are connected through an SPI interface 22, and the SPI is a four-wire serial bus interface and is a master/slave structure. The SPI interface is connected with the noise filtering module 3 in a bidirectional mode, the signal receiving module 1 sends unprocessed signals to the noise filtering module 3, and the noise filtering module 3 resends the processed signals to the signal receiving module 1.

Preferably, the noise filtering module 2 has a PIC16F18325 chip 21, the SPI interface 22 is connected to the PIC16F18325 chip 21, and the PIC16F18325 chip 21 is used for signal radio frequency noise filtering.

Further, the noise filtering module 2 has a Norflash memory 23 for writing and storing an application program. The Norflash memory 23 is connected with the PIC16F18325 chip 21.

Preferably, the signal output module 3 has an SSS1629 chip 31, the IIS interface 14 is connected to the SSS1629 chip 31, and the WM8281 chip 11 sends the processed signal to the SSS1629 chip 31 through the IIS interface 14.

Preferably, the SSS1629 chip 31 has a USB output interface 32 for converting the IIS signal to a USB signal and outputting the converted signal.

Further, the signal output module 3 further has an audio parameter storage unit 33 to store audio parameter configuration data, and the audio parameter storage unit 33 is connected to the SSS1629 chip 31. Preferably, in the embodiment of the present invention, the audio parameter storage unit 33 employs a 24CO2 chip.

Among the above-mentioned audio DSP module 100, signal receiving module 1 supports four at most analog/digital MIC input and sends the signal received for noise filter module 2, and signal filter module 2 handles the signal received and sends it back to signal receiving module 1, and signal receiving module 1 sends the signal after handling for signal output module 3, and signal output module 3 changes the signal into USB audio signal output, the module has high SNR, provides high-fidelity audio output, supports four at most analog/digital MIC inputs, makes the explanation personnel break away from instruments such as traditional handheld microphone, headset and hanging microphone completely, has extensive development application prospect.

It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the spirit of the present invention, and all the changes made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an audio DSP module, its characterized in that, audio DSP module includes signal reception module, noise filter module and signal output module, signal reception module has multichannel signal input port in order to receive signal, signal output module is equipped with USB signal output port in order to change and output signal, noise filter module is used for carrying out echo cancellation to the signal of input and obtains pure signal, signal reception module with noise filter module both way junction is so that signal both way transmission, signal reception module with signal output module links to each other.

2. The audio DSP module of claim 1 wherein the signal receiving module has a WM8281 chip with a multiplexed analog/digital MIC signal input to input the sound signal from the microphone and convert the input sound signal into an electrical signal.

3. The audio DSP module of claim 1 wherein said signal receiving module has an IIS interface, said IIS interface coupled to said signal output module.

4. The audio DSP module of claim 1 wherein said signal receiving module has an SPI interface, said SPI interface being bi-directionally coupled to said noise filtering module.

5. The audio DSP module of claim 4 wherein the noise filtering module has a PIC16F18325 chip for RF noise filtering, the SPI interface being coupled to the PIC16F18325 chip.

6. The audio DSP module of claim 3, wherein the signal output module has an SSS1629 chip, the IIS interface connected to the SSS1629 chip.

7. The audio DSP module of claim 6, wherein the SSS1629 chip has a USB output interface for converting and outputting IIS signals to USB signals.

8. The audio DSP module of claim 5 wherein the noise filtering module has a Norflash memory to program and store applications, the Norflash memory being coupled to the PIC16F18325 chip.

9. The audio DSP module of claim 6, wherein the signal output module has an audio parameter storage unit to store audio parameter configuration data, the audio parameter storage unit being connected to the SSS1629 chip.

10. The audio DSP module of claim 4 wherein the SPI interface is a four wire serial bus interface, master/slave configuration.