Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF0 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208H04J3/06
CPCG10L21/0208H04J3/0667G10L2021/02082
Inventor 兰烽佳白金涛陈洪民
Owner 海南新奎科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com