Multiple description coding for voice over IP using sinusoidal speech coding
Orozco, E, Villette, S and Kondoz, AM (2006) Multiple description coding for voice over IP using sinusoidal speech coding 2006 IEEE International Conference on Acoustics, Speech and Signal Processing, Vols 1-13 . 9 - 12. ISSN 1520-6149
|PDF - Published Version|
Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb...
CELP coders, such as G.729, are often used in VoIP systems as they offer good speech quality in the absence of packet losses. However, their reliance on long-term prediction causes propagation of errors across speech frames, and therefore makes CELP coders more sensitive to packet losses. Sinusoidal coders on the other hand do not rely on long-term prediction, and may be a good alternative for VoIP due to their higher resilience to packet losses. In this paper a comparison is made between CELP and sinusoidal coders in a VoIP application. A packetisation scheme based on Multiple Description Coding (MDC) applied to the sinusoidal coder is presented. The results show that under typical VoIP operating conditions, the sinusoidal coder based systems can outperform CELP based systems at equal bit rate, especially for high packet loss rates.
|Uncontrolled Keywords:||Science & Technology, Technology, Acoustics, Computer Science, Artificial Intelligence, Engineering, Electrical & Electronic, Imaging Science & Photographic Technology, Computer Science, Engineering|
|Divisions:||Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research|
|Deposited By:||Melanie Hughes|
|Deposited On:||07 Oct 2010 11:53|
|Last Modified:||10 May 2013 14:33|
Repository Staff Only: item control page