Method and system for eliminating multi-channel acoustic echo of remote voice frequency interaction

Abstract

The invention provides a method and a system for eliminating multi-channel acoustic echo of remote voice frequency interaction. The method for eliminating the multi-channel acoustic echo of the remote voice frequency interaction comprises the following steps of: obtaining input multi-channel sound source acoustic signals; carrying out acoustic separation processing for the input multi-channel sound source acoustic signals; carrying out acoustic echo elimination processing for each-channel acoustic signals which are subjected to the acoustic separation processing through a self-adapting filter; combining and carrying out acoustic combination for the each-channel acoustic signals which are subjected to the acoustic echo elimination processing; outputting the acoustic signal which is subjected to the acoustic combination. The system comprises a DSP (Digital Signal Processor), a multi-channel acoustic separation combining device and a self-adapting filter module. According to the method and the system, provided by the invention, the multi-channel acoustic echo can be eliminated with lower cost, high-quality voice communication is supplied, the method and the system which are provided by the invention can be applied to various complicated remote voice bidirectional voice interaction fields, the smearing time for processing the echo can be increased to be 500 ms, the acoustic bandwidth is in the range of 20 Hz to 20 KHz, and the echo elimination ability is increased to be larger than 100 dB.

Description

technical field [0001] The invention relates to the technical field of voice communication, in particular to a multi-channel acoustic echo cancellation method and system for remote audio interaction. Background technique [0002] At present, there are various application fields of remote audio exchange, including digital video conferencing, teleconferencing, handheld terminals, etc. Among them, most of the acoustic echo cancellation systems are single-channel audio echo processing, and cannot perform multi-channel acoustic simultaneous processing. Generally, when dealing with multi-channel echo cancellation, a distributed cancellation method is required, that is, an echo canceller is placed at the source end of each audio signal, which brings a great increase in user cost and construction cost. Moreover, the echo cancellation time cannot be limitedly increased to 500ms, and the echo cancellation capability is hardly greater than 100dB, and the sound quality of the echo cance...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many applications of remote audio exchange, including digital video conferencing, teleconferencing, handheld terminals, etc. Among them, most of the acoustic echo cancellation systems are single-channel audio echo processing, and cannot perform multi-channel acoustic simultaneous processing.

Generally, when dealing with multi-channel echo cancellation, a distributed cancellation method is required, that is, an echo canceller is placed at the source end of each audio signal, which greatly improves the user cost and construction cost.

Moreover, the echo cancellation time cannot be limited to 500ms, and the echo cancellation ability is difficult to be greater than 100dB, and the sound quality of echo cancellation cannot be effectively guaranteed

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