The invention provides a phonetic
end point detection method and a device therefor. The phonetic
end point detection method comprises: receiving phonetic data with
noise, dividing the phonetic data with
noise into plural overlapped phonetic frames, carrying out rapid Fourier variation calculation to obtain the
frequency spectrum of each phonetic frame; dividing the
frequency spectrum of each phonetic frame into plural sub-bands uniformly, and generating sub-band power
spectral entropy density according to sub-band energy; weighing the sub-band power
spectral entropy density to obtain sub-band weight power
spectral entropy of each phonetic frame; judging the current phonetic frame as a
noise section or phonetic section according to preset phonetic end point judgment threshold and sub-band weight power spectral entropy. The invention adopts sub-band power spectral entropy as phonetic eigenvalue of VAD judgment, and adaptively selects sub-band number and
weight factor according to actual application environment, thus improving accuracy and preciseness of phonetic detection and obviously enhancing
signal-to-noise ratio of communication.