关键词: Teager能量, 复合能量, 语音端点检测, 自适应阈值, 信噪比

Abstract: This paper presents a new speech endpoint detection algorithm to additive noise of low signal to noise ratio, the algorithm uses the Teager energy for normalized weighted short energy named Composite Energy as the characteristic parameter, and the normalized composite energy of noise as the initial threshold value, and imports an adjustment coefficient of threshold to make the threshold have good tracking performance to the energy of noise. To do computer simulation experiments on the algorithm by using MATLAB , and make a comparision between the results of experiments and the results of short energy, the results show that it can still ensure a high accuracy rate in the simulation of noises between the negative 10 dB and the negative 3 dB.

Key words: Teager energy;composite energy;speech endpoint detection;adaptive threshold;signaltonoise ratio