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A Noise Tolerance Judgment Method for Noisy Speech

A noisy speech and noise technology, applied in the field of noisy speech signal processing, can solve the problems of effective speech information loss, speech signal distortion, etc.

Active Publication Date: 2021-07-27
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In speech signal processing, after the speech enhancement of the noisy speech, while improving its signal-to-noise ratio, it will cause the loss of part of the effective speech information, causing the speech signal to be distorted.

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  • A Noise Tolerance Judgment Method for Noisy Speech
  • A Noise Tolerance Judgment Method for Noisy Speech
  • A Noise Tolerance Judgment Method for Noisy Speech

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Embodiment Construction

[0030] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0031] The method of judging the noise tolerance of noisy speech includes the determination of the threshold and the judgment based on the threshold:

[0032] Threshold determination

[0033] The first step is to extract noise samples from the Noisex-92 noise library

[0034] The noise samples of four types of additive noise, including impulse noise, broadband noise, periodic noise and speech interference, in different scenarios are extracted from the Noisex-92 noise library. Among them, applaus...

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Abstract

The invention discloses a method for judging noise tolerance of noisy speech, which selects a noisy speech sample, calculates the priori signal-to-noise ratio of each frequency point of each noisy speech sample signal, and finds the minimum priori signal-to-noise ratio among them Noise ratio: compare the minimum prior signal-to-noise ratio of each sample to determine the threshold of the noise tolerance of the noisy speech signal. Framing and pre-emphasis are performed on noisy speech, and endpoint detection is performed; power spectrum estimation is performed on noise and noisy speech respectively; the prior SNR of each frequency point of each frame is calculated. If the prior SNR of one or more frequency points is less than the threshold, the noise of the speech frame cannot be tolerated, and speech enhancement processing is required. If the prior signal-to-noise ratios of each frequency point of the frame are greater than the threshold, the noise of the speech signal of the frame can be tolerated, and speech enhancement processing is not needed. According to this judging method, it is possible to recognize noisy speech that can tolerate noise. For noise-tolerant speech with noise, there is no need for speech enhancement, thus avoiding the loss of effective information.

Description

technical field [0001] The invention relates to a method for judging whether the noise of noisy speech can be tolerated, and belongs to the technical field of processing noisy speech signals. Background technique [0002] In speech signal processing, after the speech enhancement of the noisy speech, while improving its signal-to-noise ratio, it will cause the loss of part of the effective speech information, causing the speech signal to be distorted. According to the auditory masking effect of the human ear, the presence of a speech signal can increase the threshold of its background noise being heard by the human ear. Based on this principle, the background noise of some noisy speech signals may not be heard by human ears, or even if it is heard by human ears, it will not cause discomfort to people. The present invention refers to such background noise as tolerable noise, and provides a method for judging whether the noise is tolerable. Contents of the invention [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0216G10L25/51
CPCG10L21/0216G10L25/51
Inventor 王亦红
Owner HOHAI UNIV