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http://dx.doi.org/10.7840/KICS.2012.37A.1.34

LDPC Code Design and Performance Analysis for Distributed Video Coding System  

Noh, Hyeun-Woo (가톨릭대학교 정보통신전자공학과)
Lee, Chang-Woo (가톨릭대학교 정보통신전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.1A, 2012 , pp. 34-42 More about this Journal
Abstract
Low density parity check (LDPC) code is widely used, since it shows superior performance close to Shannon limit and its decoding complexity is lower than turbo code. Recently, it is used as a channel code to decode Wyner-Ziv frames in distributed video coding (DVC) system. In this paper, we propose an efficient method to design the parity check matrix H of LDPC codes. In order to apply LDPC code to DVC system, the LDPC code should have rate compatibility. Thus, we also propose a method to merge check nodes of LDPC code to attain the rate compatibility. LDPC code is designed using ACE algorithm and check nodes are merged for a given code rate to maximize the error correction capability. The performance of the designed LDPC code is analyzed extensively by computer simulations.
Keywords
Low density parity check(LDPC) code; Distributed video coding(DVC); Rate adaptivity; ACE(approximation cycles EMD) algorithm; Parity check;
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