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Blind source separation rapid method and system based on multi-standard fusion frequency point screening

A blind source separation, multi-standard technology, applied in speech analysis, instruments, etc., can solve the problems of reduced algorithm complexity, insufficient comprehensiveness, poor performance, etc., to achieve the effect of less running time, good voice enhancement, and good performance

Active Publication Date: 2018-11-23
SHANDONG UNIV
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Problems solved by technology

This method is suitable for binaural systems and the complexity of the algorithm has been reduced. However, since there are many factors that affect the performance of frequency point separation, the current method of measuring frequency points using a single standard is not comprehensive enough, and it is easy to cause misselection. , the phenomenon of wrong screening
In other words, it is easy to appear that some frequency points that are eliminated are frequency points with good separation performance, and these frequency points that are selected have relatively poor performance.
In this case, it is not possible to provide accurate parameter estimates for frequency bins that were not selected

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  • Blind source separation rapid method and system based on multi-standard fusion frequency point screening

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[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0040] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The present invention discloses a blind source separation rapid method and system based on multi-standard fusion frequency point screening. The method comprises the steps of: performing the short-timeFourier transform of sound signals to be separated, and dividing all the frequency points after conversion into two sets; performing multi-standard fusion frequency point screening of one of the sets, and employing a complex number field independence component analysis algorithm to select frequency points with signal energy and independence meeting set threshold values; performing clustering of the screened frequency points to further reduce the number of the selected frequency points; and for the frequency points screened through adoption of the multi-standard fusion method, employing an ICAto solve a separation matrix, and employing a separation method without selection of frequency points is employed to recover source signals for the frequency points in other sets. The separation signals are subjected to the inverse short-time Fourier transform. The method can better consider the improvement of the performances and the time reduction, and is little in required operation time in the same performances compared to a single standard, and can be better used for voice enhancement.

Description

technical field [0001] The invention relates to a fast method and system for blind source separation based on multi-standard fusion frequency point screening. Background technique [0002] Blind source separation (BSS) is an algorithm that can recover the source signal well only by observing the mixed signal without using the prior information of the source signal and the transmission channel. Not only has it been widely used in bioelectrical signal processing, image processing, and cochlear implant systems, but it has also shown potential application value in hearing aids, especially binaural hearing aids, in speech enhancement. When performing speech enhancement, blind source separation can maintain the binaural cues of the sound source without knowing the distribution of the microphone array and without destroying the binaural cues. However, digital hearing aids require low power consumption and low latency, which contradicts the high complexity of traditional blind sour...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0272G10L21/0224G10L21/0232
CPCG10L21/0224G10L21/0232G10L21/0272
Inventor 魏莹闫宁
Owner SHANDONG UNIV
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