Device and method for realizing voice clock synchronization between wireless microphone and built-in microphone

A wireless microphone, clock synchronization technology, applied in time division multiplexing system, transducer acoustic response prevention, electrical components and other directions, can solve the problem of DECT chip and ADC chip can not achieve clock synchronization and so on

Pending Publication Date: 2018-09-04
XIAMEN YEALINK NETWORK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frequency correction will be performed inside the DECT chip, and there will be a difference between its working clock frequency and the input 13.824M frequency, so this method cannot make the real clock synchronization between the DECT chip and the ADC chip impossible.

Method used

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  • Device and method for realizing voice clock synchronization between wireless microphone and built-in microphone
  • Device and method for realizing voice clock synchronization between wireless microphone and built-in microphone
  • Device and method for realizing voice clock synchronization between wireless microphone and built-in microphone

Examples

Experimental program
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Embodiment 1

[0028] Such as figure 1 with figure 2 As shown, a device for synchronizing the voice clock between a wireless microphone and a built-in microphone, which includes a host chip 3, a DECT chip 1, an ADC chip 2, three built-in microphones (Mic) 4, four wireless microphones 6 (DECT_Mic) 6 and a Speaker (Spk) 5, wherein host chip (SOC) 3 and DECT chip 1 are connected via USB, speaker 5 and three built-in microphones 4 are connected to ADC chip 2, and four wireless microphones 6 are connected to DECT chip 1.

[0029] Therefore, the working clock of the wireless microphone 6 is the same as that of the DECT chip 1 , and the working clock of the built-in microphone 4 is the same as that of the ADC chip 2 . Therefore, only the working clock of the DECT chip 1 and the working clock of the ADC chip 2 need to be synchronized to realize the synchronization of the voice clock of the wireless microphone 6 and the built-in microphone 4 .

[0030]The connection between DECT chip 1 and ADC chi...

Embodiment 2

[0034] Such as image 3 with Figure 4 As shown, a device for realizing voice clock synchronization between a wireless microphone and a built-in microphone includes a host chip 3, a DECT chip 1, a first ADC chip 21, a second ADC chip 22, six built-in microphones 4, four wireless microphones 6 and a Speaker 5, wherein host chip 3 and DECT chip 1 are connected via USB, first ADC chip 21 and second ADC chip 22 are cascaded, speaker 5 is connected to first ADC chip 21, and three built-in microphones 4 are connected to first ADC chip 21 , the other three built-in microphones 4 are connected to the second ADC chip 22 , and the four wireless microphones 6 are connected to the DECT chip 1 .

[0035] Thus the working clock of the wireless microphone 6 is the same as that of the DECT chip 1, wherein the working clocks of the three built-in microphones 4 are the same as the working clocks of the first ADC chip 21, and the working clocks of the other three built-in microphones 4 are the ...

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Abstract

The invention relates to a device and method for realizing voice clock synchronization between a wireless microphone and a built-in microphone. The wireless microphone is connected to a DECT chip to ensure that the wireless microphone and the DECT chip have the same clock, the built-in microphone is connected to an ADC chip to ensure that the built-in microphone and the ADC chip have the same clock, the DECT chip is used to output a precision digital processor working clock that is corrected to drive the ADC chip, and a phase-locked loop inside the ADC chip is used to output 12.288M, 6.144M and other acceptable frequencies as a voice data processing driving clock to supply to other chips in the system; after the DECT chip receives the voice data processing driving clock output by the ADC chip, a voice data sampling rate clock of the DECT chip is obtained after internal frequency division, and the clock is simultaneously supplied to the ADC chip to achieve true clock synchronization between the DECT chip and the ADC chip, and thus the working clock synchronization between the wireless microphone and the built-in microphone can be further achieved, a reliable basis can be provided for an echo cancellation algorithm, and the echo cancellation effect of the echo cancellation algorithm can be improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a device and method for realizing the synchronization of a wireless microphone and a built-in microphone voice clock. Background technique [0002] Conference phone products will have multiple built-in microphones to pick up voices from different directions, and there will be wireless microphones to pick up the voices of people far away. The sound played by the built-in speaker can be heard in the entire conference room, and will be picked up by the built-in or wireless microphone. The voice algorithm module needs to eliminate the sound of the speaker, otherwise the other party will hear their own voice and regard it as an echo. This is the echo cancellation algorithm. [0003] To do a good job of the echo cancellation algorithm, the working clock of the microphone ADC needs to be synchronized with the working clock of the speaker DAC. Otherwise, it is necessary to increase...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04R3/02
CPCH04J3/0638H04R3/02
Inventor卢荣富冯万健曾炳阳叶国真蒋俊
OwnerXIAMEN YEALINK NETWORK TECH