Echo cancellation method and system based on timestamp synchronization

An echo cancellation and time stamping technology, applied in time division multiplexing systems, speech analysis, instruments, etc., can solve the problems of inability to effectively solve audio echo, low cancellation efficiency and low accuracy.

Pending Publication Date: 2021-07-06
海南新奎科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the audio echo is only eliminated according to the time delay, the elimination efficiency and accuracy are not high, and the audio echo problem cannot be effectively solved

Method used

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  • Echo cancellation method and system based on timestamp synchronization
  • Echo cancellation method and system based on timestamp synchronization
  • Echo cancellation method and system based on timestamp synchronization

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Experimental program
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Embodiment

[0051] Such as figure 1 As shown, in the first aspect, the embodiment of the present invention provides an echo cancellation method based on timestamp synchronization, including the following steps:

[0052] S1. Obtain a reference audio signal and an audio input signal; first, collect a reference audio signal, generally remote audio as a reference audio, and simultaneously collect an audio input signal.

[0053] S2. Use time stamps to mark the reference audio signal and the audio input signal respectively; in order to ensure the accuracy of the data, combine the time stamp synchronization to mark the obtained reference audio signal and the audio input signal, and provide accurate calculation data for the follow-up.

[0054] S3. Calculate and obtain the audio time delay according to the time stamp of the reference audio signal and the audio input signal;

[0055] Use the existing time stamp conversion tool to convert the time information recorded by the time stamp, determine t...

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PUM

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Abstract

The invention discloses an echo cancellation method based on timestamp synchronization. The method comprises the steps of acquiring a reference audio signal and an audio input signal; respectively marking the reference audio signal and the audio input signal by adopting timestamps; calculating according to the timestamps of the reference audio signal and the audio input signal to obtain audio time delay; performing swallowing elimination processing according to the reference audio signal and the audio input signal to generate cancellation adjustment information; and performing echo cancellation on the audio input signal according to the audio time delay and the cancellation adjustment information. The invention further discloses an echo cancellation system based on timestamp synchronization. Signals are marked in combination with timestamps, so that the accuracy of data is ensured; and the problem of sound swallowing is effectively solved, and the echo processing precision is improved.

Description

technical field [0001] The present invention relates to the technical field of echo cancellation, in particular to an echo cancellation method and system based on time stamp synchronization. Background technique [0002] In voice communication, if the voice of the far-end caller released by the speaker is collected by the microphone, an acoustic loop is formed between the speaker and the microphone, which will make the far-end caller hear his own echo, which will seriously affect the call quality. , the near-end signal collected by the microphone needs to undergo echo cancellation to eliminate the sound from the speaker. In the field of echo cancellation, in order to improve the processing performance of echo cancellation (for example, the convergence speed), the sub-band echo cancellation structure is often used, that is, the near-end signal and the far-end signal are decomposed into multiple sub-bands, and then respectively in An echo cancellation algorithm is applied to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208H04J3/06
CPCG10L21/0208G10L2021/02082H04J3/0667
Inventor 兰烽佳白金涛陈洪民
Owner 海南新奎科技有限公司
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