Robust statistical voice activity detection using a likelihood ratio sign test

2010 ◽  
Author(s):  
Shiwen Deng ◽  
Jiqing Han
Keyword(s):  
Likelihood Ratio ◽  
Voice Activity Detection ◽  
Sign Test ◽  
Activity Detection ◽  
Voice Activity

scholarly journals Auditory Device Voice Activity Detection Based on Statistical Likelihood-Ratio Order Statistics

2020 ◽  
Vol 10 (15) ◽  
pp. 5026
Author(s):  
Seon Man Kim
Keyword(s):  
Statistical Model ◽  
Order Statistics ◽  
Likelihood Ratio ◽  
Error Rate ◽  
Voice Activity Detection ◽  
Activity Detection ◽  
Noisy Environments ◽  
Likelihood Ratio Order ◽  
Voice Activity ◽  
False Rejection

This paper proposes a technique for improving statistical-model-based voice activity detection (VAD) in noisy environments to be applied in an auditory hearing aid. The proposed method is implemented for a uniform polyphase discrete Fourier transform filter bank satisfying an auditory device time latency of 8 ms. The proposed VAD technique provides an online unified framework to overcome the frequent false rejection of the statistical-model-based likelihood-ratio test (LRT) in noisy environments. The method is based on the observation that the sparseness of speech and background noise cause high false-rejection error rates in statistical LRT-based VAD—the false rejection rate increases as the sparseness increases. We demonstrate that the false-rejection error rate can be reduced by incorporating likelihood-ratio order statistics into a conventional LRT VAD. We confirm experimentally that the proposed method relatively reduces the average detection error rate by 15.8% compared to a conventional VAD with only minimal change in the false acceptance probability for three different noise conditions whose signal-to-noise ratio ranges from 0 to 20 dB.

Jointly Gaussian PDF-Based Likelihood Ratio Test for Voice Activity Detection

2008 ◽  
Vol 16 (8) ◽  
pp. 1565-1578 ◽  
Author(s):  
Juan Manuel Gorriz ◽  
Javier Ramirez ◽  
Elmar W. Lang ◽  
Carlos G. Puntonet
Keyword(s):  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Voice Activity Detection ◽  
Ratio Test ◽  
Activity Detection ◽  
Voice Activity
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