Comparison of Voice Activity Detection Algorithms for VoIP

Authors:
R. Venkatesha Prasad;Abhijeet Sangwan;H. S. Jamadagni;Chiranth M.C;Rahul Sah;Vishal Gaurav
Affiliations:
-;-;-;-;-;-
Venue:
ISCC '02 Proceedings of the Seventh International Symposium on Computers and Communications (ISCC'02)
Year:
2002

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Abstract

We discuss techniques for Voice Activity Detection (VAD) for Voice over Internet Protocol (VoIP). VAD aids in saving bandwidth requirement of a voice session thereby increasing thebandwidth efficiently. In this paper, we compare the quality of speech, level of compression and computational complexity for three time-domain and three frequency-domain VAD algorithms. Implementation of time-domain algorithms is computationally simple. However, better speech quality is obtained with the frequency-domain algorithms. A comparison of merits and demerits along with the subjective quality of speech after removal of silence periods is presented for all the algorithms. A quantitative measurement of speech quality for different algorithms is also presented.