Method and system for eliminating reverberation

A technology of reverberation and target speech, applied in speech analysis, instruments, etc., can solve the problems of reducing the recognizability of sound signals, huge amount of calculation, damage to sound signals, etc.

Active Publication Date: 2020-01-21
BEIJING UNISOUND INFORMATION TECH
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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

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0071] refer to figure 1 , is a schematic flowchart of a method for eliminating reverberation provided by an embodiment of the present invention. The method for eliminating reverberation includes the following steps:

[0072] In step (1), the target speech signal is preprocessed, and the speech time-frequency probability corresponding to the preprocessed target speech signal is acquired.

[0073] Preferably, in the step (1), the target speech signal is preprocess...

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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 ...

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Application Information

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IPC IPC(8): G10L21/0208G10L21/0224G10L21/0232
CPCG10L21/0208G10L21/0224G10L21/0232G10L2021/02082
Inventor 关海欣
Owner BEIJING UNISOUND INFORMATION TECH
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