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Voice enhancement method based on noise classification optimization IMCRA algorithm

A technology for speech enhancement and noise classification, applied in speech analysis, neural learning methods, biological neural network models, etc. Enhanced effect, improved intelligibility effect

Pending Publication Date: 2020-12-25
NANTONG SAIYANG ELECTRONICS CO LTD
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Problems solved by technology

However, under the condition of unknown and mismatched noise, the estimation effect of the traditional IMCRA algorithm on the noise power spectrum is severely deteriorated, and the effect on improving the intelligibility of the noisy signal is small

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  • Voice enhancement method based on noise classification optimization IMCRA algorithm
  • Voice enhancement method based on noise classification optimization IMCRA algorithm
  • Voice enhancement method based on noise classification optimization IMCRA algorithm

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Embodiment Construction

[0061] In order to explain in detail the technical solutions adopted by the present invention to achieve the intended technical purpose, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only the present invention. Some embodiments of the invention are not all embodiments, and, on the premise of not paying creative work, the technical means or technical features in the embodiments of the present invention can be replaced. The present invention will be described in detail below in conjunction with the embodiments.

[0062] A kind of speech enhancement method based on noise classification optimization IMCRA algorithm of the present invention, IMCRA algorithm passes two smoothing parameters α when estimating noise power spectrum s and alpha d And the weight parameter α in the prior SNR estimation to balance the cor...

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Abstract

The invention discloses a voice enhancement method based on a noise classification optimization IMCRA algorithm. The method comprises the following steps of: searching an optimal alpha s, alpha d andalpha parameter combination for different noise types, alpha s and alpha d being two smooth parameters of the IMCRA algorithm during the estimation of a noise power spectrum, and alpha being a weightparameter of priori signal-to-noise ratio estimation; classifying noise types of input signals by using a convolutional neural network CNN; according to different noise types, selecting different parameter groups alpha s, alpha d and alpha according to the optimization result in the step 1; and according to the parameter group selected in the step 3, carrying out voice enhancement on a test set signal by using an IMCRA method to obtain a finally enhanced voice. The method has a better voice enhancement effect, and the quality and intelligibility of the enhanced voice are improved.

Description

technical field [0001] The invention relates to a speech enhancement method, in particular to a speech enhancement method based on noise classification optimization IMCRA algorithm, which belongs to the field of speech processing. Background technique [0002] In the process of speech signal processing, the problem of noise pollution is unavoidable. Therefore, how to effectively suppress noise and improve the quality and intelligibility of speech signals has become a hot topic of research by many scholars. At present, a variety of speech enhancement algorithms have been proposed, mainly including methods based on signal processing, methods based on model training and methods based on statistical models. [0003] Among the methods based on signal processing, spectral subtraction and Wiener filtering are two most representative techniques. In the case of correctly estimating the background noise, this type of method can achieve better separation performance. However, under ...

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Application Information

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IPC IPC(8): G10L21/0264G10L21/0216G10L25/21G10L25/24G10L25/30G06N3/08G06N3/04
CPCG10L21/0264G10L21/0216G10L25/30G10L25/24G10L25/21G06N3/08G06N3/045
Inventor 张建尹红芳张涛邵洋洋
Owner NANTONG SAIYANG ELECTRONICS CO LTD
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