Title :
Embedded multiple description scalar quantizers for progressive image transmission
Author :
Gavrilescu, A.I. ; Munteanu, A. ; Schelkens, P. ; Cornelis, J.
Author_Institution :
Dept. of Electron. & Inf. Process., Vrije Univ., Brussels, Belgium
Abstract :
Robust progressive image transmission over unreliable channels with variable bandwidth requires multiple description coding (MDC) systems that produce highly error-resilient embedded bit-streams. The proposed embedded multiple description scalar quantizers (EMDSQ) meet the desired features consisting of a high redundancy level, fine grain rate adaptation and progressive transmission of each description. Experimental results show that EMDSQ yield better rate-distortion performance in comparison to the multiple description uniform scalar quantizers (MDUSQ) previously proposed in the literature. Moreover, the generalized form of EMDSQ targeting an arbitrary number of channels is proposed, which offers the possibility of designing realistic coders for practical multi-channel communication systems.
Keywords :
channel coding; image coding; quantisation (signal); visual communication; coders; embedded multiple description scalar quantizers; error-resilient embedded bit-streams; image transmission; multichannel communication systems; multiple description coding systems; multiple description uniform scalar quantizers; Bandwidth; Communication systems; Image coding; Image communication; Information processing; Rate-distortion; Redundancy; Robustness; Streaming media; Telecommunication network reliability;
Conference_Titel :
Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International Conference on
Print_ISBN :
0-7803-7965-9
DOI :
10.1109/ICME.2003.1220970
