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Method and device for estimating noise power spectral density of speech signal

A noise power spectrum and density estimation technology, applied in voice analysis, instruments, etc., can solve the problem that the noise power spectrum density is not easy

Pending Publication Date: 2019-04-12
PING AN TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0003] In the related art, although an additional algorithm is introduced to estimate the speech presence probability to further enhance the estimation, it is not easy to reliably and efficiently determine the noise power spectral density in a noise-varying environment due to the existence of many tuning parameters

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  • Method and device for estimating noise power spectral density of speech signal
  • Method and device for estimating noise power spectral density of speech signal
  • Method and device for estimating noise power spectral density of speech signal

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[0062] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0063] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0064] Such as figure 1 Shown, according to the speech signal noise power spectral density estimation method of the embodiment of the present invention, comprise:

[0065] S102, extracting the temp...

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Abstract

The invention relates to the technical field of speech processing and specifically provides a method and a device for estimating a noise power spectral density of a speech signal. The method comprisesthe following steps: extracting a time context window feature from a noise speech signal, inputting the time context window feature to a pre-trained speech existence probability estimator which outputs an estimated speech existence probability corresponding to a current time frame; correcting the estimated speech existence probability according to a Bayes rule to determine a speech existence probability; determining the noise power spectral density corresponding to the corresponding time frame based on the speech existence probability according to a recursive smoothing formula. Through the technical scheme of the invention, the estimation accuracy of the noise power spectral density is improved in the case of small computing resources, thereby being beneficial to effectively eliminating noise signals, minimizing distortion in the speech processing process and improving speech enhancement performance.

Description

technical field [0001] The present invention relates to the technical field of speech processing, in particular, to a speech signal noise power spectral density estimation method and a speech signal noise power spectral density estimation device. Background technique [0002] Single-channel speech enhancement plays an important role in communication systems, especially in noisy environments, and this method is widely used due to the advantages of computation. In monophonic speech enhancement, a noise reduction factor must be determined to successfully remove noise, usually set by a function of the noise power spectral density (PSD, Power Spectrum Density) in the time-frequency domain. [0003] In the related art, although an additional algorithm is introduced to estimate the speech presence probability to further enhance the estimation, it is not easy to reliably and efficiently determine the noise power spectral density in a noise-varying environment due to the existence of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/30G10L25/84G10L25/21G10L21/0216G10L21/0264
CPCG10L21/0216G10L21/0264G10L25/21G10L25/30G10L25/84
Inventor 赵峰王健宗肖京
Owner PING AN TECH (SHENZHEN) CO LTD
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