Method and system for eliminating reverberation

Abstract

The invention provides a method for eliminating reverberation. According to the method and system for eliminating the reverberation, speech time-frequency probability detection with respect to a speech signal is introduced in the reverberation eliminating process, calculation is performed to obtain the speech time-frequency probability of the speech signal, and adaptive updating adjustment operation is carried out on a filter used in the reverberation eliminating process according to the speech time-frequency probability, so that the updating error probability of the filter can be effectivelyreduced, the calculation frequency of the filter can be reduced, the calculation amount of reverberation eliminating can be reduced and greatly compressed, and the applicability of a reverberation eliminating algorithm to different types of processors can be improved.

Description

technical field [0001] The invention relates to the technical field of sound signal processing, in particular to a reverberation elimination method and system. Background technique [0002] When the sound wave encounters walls, ground and objects during propagation, it will reflect multiple times before reaching the corresponding microphone. In addition to receiving the direct sound wave from the sound source, the microphone will also receive a large number of reflected sound waves, and These reflected sound waves also constitute the corresponding reverberation components. Generally speaking, the early reverberation components can make the sound signal more full, while the late reverberation components will greatly reduce the identifiability of the sound signal and affect the sense of hearing of the sound signal. Therefore, the existing reverberation cancellation technology is mainly aimed at Late reverb component. [0003] Although the existing technology for eliminating ...

AI Technical Summary

Problems solved by technology

Generally speaking, the early reverberation components can make the sound signal more full, while the late reverberation components will greatly reduce the identifiability of the sound signal and affect the sense of hearing of the sound signal. Therefore, the existing reverberation cancellation technology is mainly aimed at late reverb component

[0003] Although the existing technology for eliminating late reverberation components can effectively suppress late reverberation components, the online algorithm designed by this technology will update the sound filter to the wrong direction when the noise is strong and coherent , so that the reverberation component cannot be effectively eliminated, and it will also cause damage to the sound signal and reduce the identifiable performance of the sound signal. Also, because the online algorithm eliminates the reverberation component and the length of the filter, and when When the order of the filter is high, the amount of calculation involved is huge, which limits the online algorithm to be run on a processor with low computing power

It can be seen that the existing technology cannot realize accurate and efficient elimination of reverberation components, especially high-order reverberation components

Images