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Microphone array speech enhancement method based on collaborative nonlinear adaptive filtering

A technology of microphone array and self-adaptive filtering, which is applied in speech analysis, instruments, etc., can solve problems such as noise reduction of speech signals, and achieve the effect of filtering out noise interference signals

Active Publication Date: 2019-11-22
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a microphone array speech enhancement method based on cooperative nonlinear adaptive filtering technology to solve the problem of noise reduction of speech signals

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  • Microphone array speech enhancement method based on collaborative nonlinear adaptive filtering
  • Microphone array speech enhancement method based on collaborative nonlinear adaptive filtering
  • Microphone array speech enhancement method based on collaborative nonlinear adaptive filtering

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Embodiment Construction

[0044] The technical solutions of the present invention will be clearly and completely described below through specific embodiments.

[0045] The microphone array speech enhancement method based on cooperative non-linear adaptive filtering provided by the present invention, the enhancement process is as follows figure 2 As shown, it specifically includes the following steps:

[0046] (1) Input the noisy speech signal into the microphone array as X(n)=A(θ)S(n)+N(n), wherein the noisy speech signal X(n)=A(θ)S(n) θ in +N(n) is the incoming wave direction of the target signal, A(θ) is the array flow pattern of the target signal, S(n) is the target voice signal, N(n) is directional interference noise or random noise ; The microphone array performs delay estimation and delay compensation to the received noisy speech signal, so that the signals in each microphone channel are consistent in time, and the bands of each microphone channel after delay estimation and delay compensation a...

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Abstract

The invention relates to a microphone array speech enhancement method based on collaborative nonlinear adaptive filtering. The method comprises the following specific steps: (1) inputting a noisy speech signal into a microphone array, and performing delay estimation and delay compensation on the received noisy speech signal by the microphone array so as to obtain an aligned noisy speech signal; (2) dividing the aligned noisy speech signal into two parts for processing, and processing one part with a linear filter through an LMP adaptive algorithm; (3) processing the other part with a nonlinearfilter; and (4) implementing speech output of the microphone array based on speech outputs through the linear filter and the nonlinear filter respectively. According to the microphone array speech enhancement method based on a collaborative nonlinear adaptive filtering technology disclosed by the invention, the output of the speech signal is adjusted collaboratively through the combination of thelinear filter and the nonlinear filter, thereby filtering noise interference signals to the maximum extent, and realizing adaptive speech enhancement of the speech signal.

Description

technical field [0001] The invention relates to the technical fields of electronic communication and information engineering, in particular to a microphone array speech enhancement method based on cooperative non-linear adaptive filtering technology. Background technique [0002] Voice is an important way for human beings to communicate information and express emotions. It is the most direct and effective way for people to communicate with each other. It is also the main tool for control and communication between humans and machines. The 21st century is the era of information technology. With the popularization of artificial intelligence, remote voice technology is more and more used in the needs of human life. Coupled with the rapid development of the mobile phone smart industry, it also promotes the progress of voice enhancement technology. Speech signal processing has high requirements on the quality of the speech signal. However, the picked-up speech signal contains noi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0216
CPCG10L21/0208G10L21/0216G10L2021/02166
Inventor 赵益波杨蕾严涛陆浩志
Owner NANJING UNIV OF INFORMATION SCI & TECH
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