Based on all these above , the results of main research are as follows : ( 1 ) a voice activity detection ( vad ) algorithm based on dct band - partitioning spectral entropy is proposed 本文以此為基礎,并取得了如下研究成果: ( 1 )提出了基于dct分帶譜熵的語音檢測算法。
On the basis of analyzing noise property , this thesis emphasizes on two noise estimation methods : classical method based on voice activity detection ( vad ) and the latest method based on optimal smoothing and minimum statistics . some improvements have been proposed to enhance the vad ’ s performance based on lpc cepstrum coefficients 2 .在分析噪聲特性的基礎上,重點研究了基于語音活性檢測和基于連續更新噪聲譜的兩種噪聲參數估計方法,并提出了將能零積的思想應用到基于lpc倒譜系數的語音活性檢測算法中。