Method and device for estimating reverberation time

A technology of reverberation time and reverberation, which is used in the measurement of reverberation time, measurement devices, speech analysis, etc., to achieve the effect of improving estimation accuracy

Active Publication Date: 2021-08-31
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

[0034] Embodiments of the present invention provide a reverberation time estimation method and device, which are used to solve the problem of excessive reverberation time of reverberation speech whose reverberation time is less than a preset threshold in the existing speech model-based reverberation time estimation method. estimated problem

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  • Method and device for estimating reverberation time
  • Method and device for estimating reverberation time
  • Method and device for estimating reverberation time

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Embodiment Construction

[0141]In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0142] In order to solve the problem of overestimating the reverberation time of the reverberation speech whose reverberation time is less than the preset threshold in the existing speech model-based reverberation time estimation method, in the embodiment of the present invention, the existing speech model-based The reverberation time estimation method was improved.

[0143] In the embodiment of the present invention, a reverberant speec...

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Abstract

The invention discloses a reverberation time estimation method and device, which are used to solve the overestimation of the reverberation time of reverberation speech whose reverberation time is less than a preset threshold in the existing speech model-based reverberation time estimation method The problem. The method is: obtaining the current reverberation speech signal in a reverberation environment; determining an autocorrelation function based on the historical reverberation speech signal and the current reverberation speech signal; according to the autocorrelation function and a preset maximum likelihood estimation model , to determine the reverberation time of the current reverberation speech signal.

Description

technical field [0001] The present invention relates to the technical field of audio signal processing, in particular to a reverberation time estimation method and device. Background technique [0002] Reverberation time (expressed as RT 60 ) is defined as: counting from the time when the sound excitation stops in a specific house space, its residual sound energy is attenuated to -60dB after multiple reflections (equivalent to the average sound energy density being reduced to the original 10 -6 ) required time. Reverberation time is an important index to measure the reverberation characteristics of a specific house space, and is closely related to the calculation and estimation of late-reverberation power in the de-reverberation algorithm. [0003] The traditional method of estimating reverberation time is to use the sound excitation method. The main idea is to measure the time it takes for the sound energy to decay to 60dB lower than the energy at the initial observation ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00G10L19/09G10L19/26G10L21/02G10L21/057G10K15/08H04S7/00
CPCG10K15/08G10L19/00G10L19/09G10L19/26G10L21/02G10L21/057G10L2019/0011H04S7/305G01H7/00
Inventor 邹莹梁民沙永涛
Owner CHINA ACAD OF TELECOMM TECH
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