Joint source-channel codes based on irregular turbo codes and variable length codes

Abstract--Variable length codes (VLCs), used in data compression, are very sensitive to error propagation in the presence of noisy channels. To address this problem, several joint sourcechannel turbo techniques have been proposed in the literature. In this paper, we focus on pairs of source/VLC of low redundancy, i.e., when there is a good match between the source statistics and the length distribution of the VLC. It is a case not considered extensively in the literature so far and the classical concatenation of a VLC and a convolutional code is not satisfying. Through EXIT chart and interleaving gain analysis, we show that

• Type: Journal
• Year: 2008
• Where: TCOM
• Authors: Xavier Jaspar, Luc Vandendorpe
• Keywords: Data Compression, Joint Sourcechannel Turbo, Noisy Channels, TCOM 2008