Title :
Iterative decoding of JPEG coded images with channel coding
Author :
Xiang, Wei ; Pietrobon, Steven S. ; Barbulescu, S. Adrian
Author_Institution :
Inst. for Telecommun. Res., South Australia Univ., The Levels, SA, Australia
fDate :
23 Feb.-1 March 2003
Abstract :
The iterative decoding of JPEG coded images combined with channel coding over noisy channels is investigated. JPEG images use the Huffman codes as the variable length coding scheme. These Huffman codes can be represented by an irregular trellis structure proposed by Balakirsky (1997). State transition probabilities can be derived from the irregular trellis and can be used as a priori information to help iterative decoding between channel and source APP decoders. Due to the poor distance property of original JPEG DC Huffman code, a symmetric RVLC with free distance df = 2 is proposed, which can dramatically improve the system performance when iterative decoding is performed.
Keywords :
Huffman codes; channel coding; image coding; iterative decoding; multimedia communication; trellis codes; variable length codes; APP decoders; Huffman codes; JPEG coded images; RVLC; channel coding; iterative decoding; noisy channels; priori information; source-channel decoding; state transition probabilities; trellis structure; variable length coding scheme; Australia; Channel coding; Codecs; Design optimization; Image coding; Iterative decoding; Redundancy; Robustness; Signal to noise ratio; System performance;
Conference_Titel :
Telecommunications, 2003. ICT 2003. 10th International Conference on
Print_ISBN :
0-7803-7661-7
DOI :
10.1109/ICTEL.2003.1191632
