Echo cancellation system and method of multichannel sound mixing

Abstract

The invention provides an echo cancellation system and method of multichannel sound mixing. The echo cancellation system comprises a voice assistant module and one or more sound signal generating devices which correspondingly output first audio data andsecond audio data adapted to the configuration of a loudspeaker; a copy module for copying the first audio data and the second audio data to obtain correspondingthird audio data and correspondingfourth audio data; a first sound mixing module for mixing and converting the first audio data and the second audio data to obtain first sound mixing data of a second sound channel; a second sound mixing module for mixing the third audio data and the fourth audio data to obtain second sound mixing data; an echo cancellation module for echo cancellation according to the first sound mixing data; and a playingmodule for receiving and playing the second sound mixing data. The echo cancellation system has the beneficial effects that echo cancellation is achieved according to mixed sound mixing data of the multichannel audio data, and thus the functional diversity andthe goodness of products are improved.

Description

technical field [0001] The invention relates to the field of echo cancellation, in particular to an echo cancellation system and method for multi-channel sound mixing. Background technique [0002] The audio equipment in the prior art usually has the problem of acoustic echo, and the audio channel output and echo sampling of traditional voice assistants are mainly two-channel, and the speaker configuration of the audio equipment only supports two-channel output . [0003] Therefore, traditional voice assistant devices with voice interaction functions are usually two-channel and mono-channel devices, that is, the audio output of the above-mentioned voice assistant device only supports a single output of its own audio. Therefore, in order to eliminate external noise and self-excited echo and other noises, the voice assistant device usually echoes the played two-channel or mono-channel sound, and uses AEC (Acoustic Echo canceller, echo cancellation) related algorithms to filte...

AI Technical Summary

Problems solved by technology

Therefore, the multi-channel audio in the prior art and its own single audio can be output at the same time, but what is picked back is only the two-channel or mono-channel audio data of its own single audio, when the voice assistant device (Voice Assistant) outputs two When channeling data, the output audio data will be directly taken back for echo cancellation before being output to the mixer

Such an implementation method only realizes the echo suppression of the voice assistant device relative to its own output, and cannot realize echo cancellation for the output of the application program or the audio decoder, that is, only two-channel echo can be realized, so the existing technology cannot echo much The audio data of the channel, thereby reducing the effectiveness of echo cancellation, thereby reducing the functional diversity and superiority of the product

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