Technical Program

Paper Detail

Paper:SPCOM-P3.8
Session:Joint Source/Channel Coding and Quantization
Time:Wednesday, May 19, 09:30 - 11:30
Presentation: Poster
Topic: Signal Processing for Communications: Joint Source-Channel Coding
Title: OPTIMAL VLC SEQUENCE DECODING EXPLOITING ADDITIONAL VIDEO STREAM PROPERTIES
Authors: Hang Nguyen; Alcatel 
 Pierre Duhamel; CNRS 
 Jérôme Brouet; Alcatel 
 Denis Rouffet; Alcatel 
Abstract: Joint source-channel decoding of Variable Length Codes (VLC) for image and video streaming transmission over unreliable links, such as wireless networks, is a subject of increasing interest. This paper proposes a optimum Maximum Likelihood decoder of VLC sequences which exploits additional inherent redundancy in the source information, namely (i)the correlation between bits inside a VLC codeword as well as (ii) the correlation between VLC codewords of a VLC sequence unit (e.g. corresponding to one image block). The demonstration of the optimality of the proposed decoder are outlined. Finally, performance results for improving video decoding over AWGN channels are presented and compared to the prefix-based decoder as well as the recently proposed VLC decoders.
 
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