Microphone array multi-target voice enhancement method based on blind source separation and spectral subtraction
A technology of microphone array and blind source separation, which is applied in voice analysis, instruments, etc., can solve the problems that cannot meet the practical application and limit the effective sound pickup effect of the array pickup device, so as to improve the voice quality, improve the voice intelligibility, easily identifiable effects
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[0059]In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.
[0060] see figure 2 , the multi-objective speech enhancement method of the present invention, at first carry out signal preprocessing to each single-channel signal (speech signal) that the microphone array of two-dimensional area array collects, the speech signal of single-channel is divided into a lot of short-time speech segments, obtains frame signal for subsequent speech activation detection and spectral subtraction processing. The signal preprocessing includes band-pass filtering, pre-emphasis processing, overlapping framing, and Hamming window processing.
[0061] Perform speech activation detection and spectral subtraction processing on the single-channel frame signals, and then perform blind source separation on all channels of...
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