关键词: 端点检测, 排列组合熵, 排列数

Abstract: As to sequential speech recognition，detecting the ending point of speech signals has shown its important role.This paper proposes a new speech detection method based on permutation entropy.Permutation and window size on detecting performance was analyzed.The comparison experiments of speech signals corresponding to different SNR and noise type was designed using the measure of complexity behaviors.Simulation results indicate that the method has better performance than frequency-entropy， especially in detecting low-SNR signal.The method has good robustness and strong real-time capabilities.It provides a new approach for detecting endpoints of weak signals under noisy environment.

Key words: Speech endpoint detection, permutation entropy, permutation