Title :
Density evolution analysis of correlated sources compressed with LDPC codes
Author :
Tian, Tao ; Garcia-Frias, Javier ; Zhong, Wei
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
29 June-4 July 2003
Abstract :
We consider a compression system for memory correlated binary sources using irregular LDPC codes as source codes. In order to incorporate the hidden Markov model (HMM) defining the source correlation, we propose a modified density evolution algorithm. Irregular LDPC codes optimized with this algorithm achieve a performance close to the theoretical Slepian-Wolf limit.
Keywords :
correlation theory; data compression; hidden Markov models; optimisation; parity check codes; source coding; HMM; Slepian-Wolf limit; code optimization; compression system; density evolution analysis; hidden Markov model; irregular LDPC code; memory correlated binary source code; source correlation; Bit rate; Decoding; Hidden Markov models; Parity check codes; Random variables; Source coding; Testing; Time sharing computer systems;
Conference_Titel :
Information Theory, 2003. Proceedings. IEEE International Symposium on
Print_ISBN :
0-7803-7728-1
DOI :
10.1109/ISIT.2003.1228186
