Robust VLC sequence decoding exploiting additional video stream properties with reduced complexity

H. Nguyen, P. Duhamel, J. Brouet, D. Rouffet
2004 IEEE International Conference on Multimedia and Expo (ICME) (IEEE Cat. No.04TH8763)  
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. Paper [7] shows that much more residual source redundancy can be exploited when both types of correlation: (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), are taken into account.
more » ... into account. Paper [11] proposes an optimum Maximum Likelihood (ML) decoder of VLC sequences which can exploit these two kinds of correlation and outperforms the existing VLC decoders. This paper proposes a reduced complexity version of this optimal VLC decoder. Simulation results show that the complexity is reduced by 5 while the performance is only slightly sub-optimal compared with the optimal version of paper [11] . Index Terms-VLC decoding, compressed image and video decoding, source redundancy, joint source-channel decoding.
doi:10.1109/icme.2004.1394207 fatcat:5hm3pcr2nzhcllyqtm4sqt5vrm