Endpoint detection method for reducing noise influence
A technology for endpoint detection and noise impact, used in speech analysis, speech recognition, instrumentation, etc.
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[0077] The present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0078] refer to Figure 1 to Figure 5 , an endpoint detection method that reduces the influence of noise, first uses the improved multi-window spectral estimation spectral subtraction method to reduce the noise of the noisy speech to obtain a higher output signal-to-noise ratio, and then uses the parameter-variable sub-band spectral entropy method to eliminate Each spectral line amplitude is affected by the noise, and the sub-band spectral entropy is used as a parameter to perform double-threshold endpoint detection. The detection method includes the following steps:
[0079] Step 1: Perform windowing and frame division on the noisy speech, perform discrete Fourier transform...
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