Turbo codes based image transmission for channels with random errors

Lei Yao; Lei Cao

doi:10.1117/12.686358

2 October 2006 Turbo codes based image transmission for channels with random errors

Lei Yao, Lei Cao

Proceedings Volume 6391, Multimedia Systems and Applications IX; 63910M (2006) https://doi.org/10.1117/12.686358
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

In this paper, we propose a joint source-channel coding scheme for progressive image transmission over binary symmetric channels(BSCs). The algorithm of set partitioning in hierarchical trees (SPIHT) is used for source coding. Rate-compatible punctured Turbo codes (RCPT) concatenated with multiple cyclic redundancy check (CRC) codes are adopted for channel protection. For a fixed transmission rate, the source and channel code rates are jointly optimized to maximize the expected image quality at the receiver. Two technical components which are different from existing methods are presented. First, a long data packet is divided into multiple CRC blocks before being coded by turbo codes. This is to secure a high coding gain of Turbo codes which is proportional to the interleaver size. In the mean time, the beginning blocks in a packet may still be useable although the decoding of the entire packet fails. Second, instead of using exhaustive search, we give a genetic algorithm (GA) based optimization method to find the appropriate channel code rates with low complexity. The effectiveness of the scheme is demonstrated through simulations.

Citation Download Citation

Lei Yao and Lei Cao "Turbo codes based image transmission for channels with random errors", Proc. SPIE 6391, Multimedia Systems and Applications IX, 63910M (2 October 2006); https://doi.org/10.1117/12.686358

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KEYWORDS

Error control coding

Image transmission

Distortion

Computer programming

Forward error correction

Image quality

Image compression

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