A Speech Enhancement Method Combining mmse and Spectral Subtraction

A technology of speech enhancement and spectral subtraction, applied in speech analysis, instruments, etc., can solve the problem of limited degree of speech enhancement, and achieve the effect of improving the effect of speech enhancement, convenient operation, and limited quality improvement.

Active Publication Date: 2020-07-03
HUITING ACOUSTICS TECH BEIJING CO LTD
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Problems solved by technology

However, MMSE also has the problem of limited speech enhancement, which limits its ability to improve speech quality while suppressing music noise.

Method used

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  • A Speech Enhancement Method Combining mmse and Spectral Subtraction
  • A Speech Enhancement Method Combining mmse and Spectral Subtraction
  • A Speech Enhancement Method Combining mmse and Spectral Subtraction

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Embodiment Construction

[0026] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not 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. 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.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of descr...

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Abstract

The invention provides a voice enhancement method combined with improved MMSE and spectral subtraction. The method comprises the steps that a voice signal is acquired, and pre-emphasis and fourier transform are conducted; a noise power spectrum is estimated; a priori and posterior signal-to-noise ratio is calculated, and MMSE processing is performed on the signal on the basis of a short-time spectrum; a gain matrix and an isolated factor are calculated by means of the improved spectral subtraction; the gain matrix is corrected by utilizing the isolated factor so as to suppress music noise; theenhanced voice signal is obtained through inverse transformation. The algorithm can be used for more effectively suppressing the music noise, and the voice signal-to-noise ratio and the intelligibility after denoising are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of speech signal processing, and specifically refers to a speech enhancement method combining MMSE and spectral subtraction. Background technique [0002] The speech signals we receive every day are difficult to be pure. They are all mixed with more or less noise. The noise may come from the environment, recording equipment or even the speaker himself. Therefore, in order to improve the speech quality and speech intelligibility, we Speech enhancement technology needs to be applied. [0003] Speech enhancement is an important technology in speech processing, and its purpose is to extract the original speech as pure as possible from noisy speech. However, since noise signals are generated randomly, it is almost impossible to completely eliminate noise. Therefore, the goals of actual speech enhancement mainly include: improving speech clarity and speech quality; improving speech intelligibility to facilitate ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/02G10L21/0216G10L21/0208G10L25/18
Inventor 颜钱明虞安波
Owner HUITING ACOUSTICS TECH BEIJING CO LTD
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