Echo cancellation method, device and communication device

Abstract

The invention provides an echo cancellation method, an echo cancellation device and call equipment, and relates to the field of communication. The method comprises the steps of caching record data and playback data; respectively marking the record data and the playback data with timestamps; acquiring the fixed delay of the call equipment; correcting the timestamp of the record data and the timestamp of the playback data according to the fixed delay; and canceling echo of the corrected record data. Therefore, accuracy of echo cancellation can be improved, data jitter can be eliminated, and call quality and effect in a VoIP multi-path call can be improved, and thus the effect with high quality can be acquired while people uses the VoIP call mode with low cost.

Description

technical field [0001] The present invention relates to the communication field, in particular to an echo cancellation method, device and communication equipment. Background technique [0002] VoIP (Voice over Internet Protocol, VoIP) digitizes analog signals and transmits them in real time on the IP Network (IP Network) in the form of Data Packets. Simply put, it is to directly dial the other party's fixed line and mobile phone through the Internet, including domestic long distance and international long distance, and the tariff is 10% to 20% of the traditional telephone fee. Because of this, Internet calls are more and more popular. [0003] However, there are still many problems in VoIP calls, such as echoes in calls, especially in multi-way calls. Seriously affect the call quality and reduce the user experience. [0004] At present, to solve the above problems, the echo cancellation is mainly performed on the uplink recording data by directly using some classic echo ca...

AI Technical Summary

Problems solved by technology

The echo cancellation effect of this method varies with different calling devices, because the original classical algorithm does not take into account the inherent delay of the calling device

Especially nowadays, the structure of the audio module of the call device is becoming more and more complex, which makes the inherent delay of the call device longer and longer, and the inherent delay of the call device has a greater impact on the effect of subsequent echo cancellation.

This makes the classical de-echoing algorithm increasingly unreliable

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