NDLI: Graph-based code design for quadratic-Gaussian Wyner-Ziv problem with arbitrary side information

Content Provider	IEEE Xplore Digital Library
Author	Yi-Peng Wei Shih-Chun Lin Yu-Hsiu Lin Hsuan-Jung Su
Copyright Year	2012
Description	Author affiliation: Graduate Institute of Communication Engineering, National Taiwan University, Taipei, Taiwan (Yi-Peng Wei; Yu-Hsiu Lin; Hsuan-Jung Su) \|\| Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan (Shih-Chun Lin)
Abstract	Wyner-Ziv coding (WZC) is a compression technique using decoder side information, which is unknown at the encoder, to help the reconstruction. In this paper, we propose and implement a new WZC structure, called residual WZC, for the quadratic-Gaussian Wyner-Ziv problem where side information can be arbitrarily distributed. In our two-stage residual WZC, the source is quantized twice and the input of the second stage is the quantization error (residue) of the first stage. The codebook of the first stage quantizer must be simultaneously good for source and channel coding, since it also acts as a channel code at the decoder. Stemming from the non-ideal quantization at the encoder, a problem of channel decoding beyond capacity is identified and solved when we design the practical decoder. Moreover, by using the modified reinforced belief-propagation quantization algorithm, the low-density parity check code (LDPC), whose edge degree is optimized for channel coding, also performs well as a source code. We then implement the residual WZC by an LDPC and a low-density generator matrix code (LDGM). The simulation results show that our practical construction approaches the Wyner-Ziv bound. Compared with previous works, our construction can offer more design flexibility in terms of distribution of side information and practical code rate selection.
Starting Page	6
Ending Page	10
File Size	848064
Page Count	5
File Format	PDF
ISBN	9781467325806
ISSN	21578117
e-ISBN	9781467325790
e-ISBN	9781467325783
DOI	10.1109/ISIT.2012.6284308
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decoding Parity check codes Quantization Channel coding Algorithm design and analysis Source coding
Content Type	Text
Resource Type	Article

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