语音活动检测
计算机科学
语音识别
似然比检验
隐马尔可夫模型
探测器
编码(社会科学)
线性预测编码
信噪比(成像)
语音编码
噪音(视频)
探测理论
语音处理
人工智能
统计
数学
电信
图像(数学)
作者
Jongseo Sohn,Nam Soo Kim,Wonyong Sung
出处
期刊:IEEE Signal Processing Letters
[Institute of Electrical and Electronics Engineers]
日期:1999-01-01
卷期号:6 (1): 1-3
被引量:1189
摘要
In this letter, we develop a robust voice activity detector (VAD) for the application to variable-rate speech coding. The developed VAD employs the decision-directed parameter estimation method for the likelihood ratio test. In addition, we propose an effective hang-over scheme which considers the previous observations by a first-order Markov process modeling of speech occurrences. According to our simulation results, the proposed VAD shows significantly better performances than the G.729B VAD in low signal-to-noise ratio (SNR) and vehicular noise environments.
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