VAD techniques for real-time speech transmission on the Internet
5th IEEE International Conference on High Speed Networks and Multimedia Communication (Cat. No.02EX612) - Trang 46-50
Tóm tắt
We discuss techniques for voice activity detection (VAD) for voice over Internet Protocol (VoIP). VAD aids in reducing the bandwidth requirement of a voice session, thereby using bandwidth efficiently. Such a scheme would be implemented in the application layer. Thus the VAD is independent of the lower layers in the network stack (see Flood, J.E., "Telecommunications Switching - Traffic and Networks", Prentice Hall India). We compare four time-domain VAD algorithms in terms of speech quality, compression level and computational complexity. A comparison of the relative merits and demerits along with the subjective quality of speech after the pruning of silence periods is presented for all the algorithms. A quantitative measurement of speech quality for different algorithms is also presented.
Từ khóa
#Speech #Internet #Payloads #Bandwidth #Telephony #Throughput #Protocols #Computational complexity #Background noise #Electronic mailTài liệu tham khảo
haykin, 0, An Introduction to Analog & Digital Communications, 202
0, Tanenbaum Computer Networks
prasad, 2002, Comparison of Voice Activity Detection Algorithms for VoIP, submitted to the Seventh IEEE Symposium on Computers and Communication
xie, 0, Enhancing VoIP designs with PCM Coders, Communication System Design Magazine
cho, 2001, Mixed Decision-Based Noise Adaption for Speech Enhancement, Electron Lett Online, 10.1049/el:20010368
sohn, 1999, A statistical model-based voice activity detection, IEEE Signal Processing Letters, 6
flood, 0, Telecommunication Switching Traffic and Networks
10.1109/CCECE.1997.608260
feher, 2001, Wireless Digital Communications
pollak, 1993, Noise Suppression System for a Car, Proceedings of the Third European Conference on Speech Communication and Technology Eurospeech '93, 1073
10.1002/j.1538-7305.1975.tb02840.x
10.1002/9781118142882
sangwan, 2001, Voice Activity Detection for VoIP- Time and Frequency domain Solutions, Proc Tenth Annual Symposium on Multimedia Communication and Signal Processing, 20
0, RTP Real Time Protocol RFC 1889