Because of the large difference between spectrum of speech and noise and great ability of dct to reduce the correlation of signal , it is advantage to use dct domain spectral entropy to do vad 由于語音與噪音的頻譜區(qū)別很大, dct去除信號相關(guān)性的能力很強(qiáng),利用dct譜熵在噪聲環(huán)境下進(jìn)行語音檢測有其獨(dú)特的優(yōu)勢。