Method and device for demodulating reverberation of audio signals

Abstract

The embodiment of the invention discloses a method and device for demodulating reverberation of audio signals. The method comprises the steps of acquiring first and second audio reverberation signalswhich are acquired from an audio channel, wherein the first audio reverberation signals are acquired from M frequency points in a current frame, and the second audio reverberation signals are acquiredfrom M frequency points in a historical frame; according to the first and second audio reverberation signals, updating N frequency points in the M frequency points on the basis of a room regression coefficient corresponding to the historical frame to obtain a room regression coefficient corresponding to the N frequency points in the current frame, and configuring known numerical values accordingto a room regression coefficient corresponding to (M-N) frequency points in the M frequency points (except the N frequency points) in the current frame; obtaining a pure voice signal corresponding tothe current frame according to the room regression coefficient corresponding to the M frequency points in the current frame.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for de-reverberating audio signals. Background technique [0002] In far-field voice interaction, the microphone is usually far away from the sound source, and the received audio signal will be affected by reverberation. Reverberation greatly reduces the recognition accuracy of audio signals, leading to a sharp decline in the accuracy of existing speech recognition. [0003] In order to reduce the influence of reverberation on the audio signal, the received audio signal is usually de-reverberated. De-reverberation can be improved to a certain extent to enhance the experience of voice interaction. In the prior art, there are some dereverberation algorithms for filtering out reverberation in audio signals. However, these de-reverberation algorithms usually have the following problem: when solving the filter coefficients for filtering reverberation, a large ...

AI Technical Summary

Problems solved by technology

However, these reverberation algorithms usually have the following problems: when solving the filter coefficients for filtering reverberation, a large number of calculations of matrix inversion and matrix multiplication are often involved

The amount of calculation between the matrices is large and the algorithm complexity is high, so the real-time performance of the reverberation algorithm will be poor, which will affect the performance of understanding reverberation

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