Title :
Quantisation for Multiple Description Coding for voice over IP
Author :
Kakouros, S. ; Villette, S. ; Kondoz, A.M.
Author_Institution :
Centre for Commun. Syst. Res., Univ. of Surrey, Guildford
fDate :
March 31 2008-April 4 2008
Abstract :
The transmission of voice over IP networks is heavily affected by packet losses. An increasingly popular method to increase the error resilience of these systems is the use of multiple description coding (MDC). However, the MDC techniques commonly used tend to add a significant amount of redundancies, which are not always easy to use optimally. In this paper, we propose a simple vector quantisation scheme to maximise MDC performance, and study several factors affecting its performance under various error conditions. The results show that it is possible to obtain good performance under packet loss conditions, while using only limited amounts of redundancy.
Keywords :
Internet telephony; speech coding; vector quantisation; voice communication; error resilience; multiple description coding quantisation; packet losses; vector quantisation scheme; voice over IP networks; Communication systems; Decoding; Degradation; Internet telephony; Programmable control; Propagation losses; Quantization; Redundancy; Speech coding; Speech processing; Speech coding; quantization;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518729