1 research outputs found
A Binary Wyner-Ziv Code Design Based on Compound LDGM-LDPC Structures
In this paper, a practical coding scheme is designed for the binary Wyner-Ziv
(WZ) problem by using nested low-density generator-matrix (LDGM) and
low-density parity-check (LDPC) codes. This scheme contains two steps in the
encoding procedure. The first step involves applying the binary quantization by
employing LDGM codes and the second one is using the syndrome-coding technique
by utilizing LDPC codes. The decoding algorithm of the proposed scheme is based
on the Sum-Product (SP) algorithm with the help of a side information available
at the decoder side. It is theoretically shown that the compound structure has
the capability of achieving the WZ bound. The proposed method approaches this
bound by utilizing the iterative message-passing algorithms in both encoding
and decoding, although theoretical results show that it is asymptotically
achievable