Method of Speech Signal Smoothing Endpoint Detection Based on Short-term Cepstrum Quick-changing

Shortwave communication occupies an irreplaceable position in the communication domain because of its characteristic of sky wave propagation.A method of the speech signal smoothing endpoint detection based on short-term cepstrum acceleration is proposed to solve the problem of the low SNR in shortwave communication,which severely influences the result of speech processing.In this method,the preliminary determination of the speech signal endpoint is obtained by detecting the cepstrum characteristic of noise signal,and then smoothing optimization processing and Holdon design are adopted to reduce the erroneous judgement caused by the cepstrum quick-changing.The simulation experiment of actual shortwave signal processing shows that the above method gets a satisfactory result without putting over burden to systems.