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Voice signal enhancement system and method

A voice signal and voice enhancement technology, which is applied in the field of signal processing, can solve the problem of poor real-time enhancement performance of target source tracking target source, etc., and achieve the effect of superior processing effect, small delay, and enhanced practicability

Inactive Publication Date: 2013-02-20
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0009] The technical problem solved by the present invention is that when the existing speech enhancement system and method process the speech signal in the actual application environment, the real-time tracking of the target source and the poor performance of the real-time enhancement of the target source

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0023] The speech enhancement system of the present invention and the method adopted by the speech enhancement system are studied based on the actual application environment. The experimental data used in the present invention are all recorded in actual scenes, and the theory is combined with experiments to obtain a general processing method framework. Simultaneously, in order to achieve the purpose that the present invention can run in real time, we not only considered the running effect, but also put the calculation speed into the research of the present invention as another important factor, so that the present invention can take into account both the running effect and the calculation speed. Based on the above conside...

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Abstract

The invention discloses a voice signal enhancement system and a voice signal enhancement method. The method comprises the following steps of: filtering an input signal by an adaptive filter to obtain a voice reference signal and performing noise extraction processing on the input signal by using a block matrix to obtain a noise reference signal; filtering the noise reference signal and the voice reference signal through multi-channel Wiener filtering to obtain a denoised voice signal; performing voice enhancement processing on the denoised voice signal according to the noise reference signal to obtain an enhanced voice signal and a voice existence probability signal; and updating a filter coefficient of the adaptive matching filter, the block matrix and a filter coefficient and a learning step length of a multi-channel Wiener filter according to the voice existence probability signal. By the voice signal enhancement system and the voice signal enhancement method, under the condition that a microphone array is relatively simple, the problems that convergence cannot be guaranteed, the speed is low and the real-time enhancement distortion is high during real-time tracking of a target source in a practical application environment can be solved.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to the enhancement processing of speech signals, in particular to a speech enhancement system and method. Background technique [0002] Speech enhancement refers to the technology of extracting useful speech signals from the noise background to suppress and reduce noise interference when the speech signal is interfered by various noises. One of the main goals of speech enhancement is to extract the original speech as pure as possible from the noisy speech signal and improve the speech quality. With the maturity of digital signal processing theory and the substantial improvement of hardware computing capabilities, the performance and real-time performance of microphone array-based speech enhancement can be guaranteed. [0003] The traditional generalized sidelobe cancellation speech enhancement method must know the accurate azimuth angle of the target source, a...

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Application Information

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IPC IPC(8): G10L21/02
Inventor 张宁马峰戴礼荣凌震华
Owner UNIV OF SCI & TECH OF CHINA
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