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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yang Yang Cheng, S. Zixiang Xiong Wei Zhao |
| Copyright Year | 2003 |
| Description | Author affiliation: Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA (Yang Yang; Cheng, S.; Zixiang Xiong) |
| Abstract | This paper considers TCQ and LDPC codes for the quadratic Gaussian Wyner-Ziv problem. After TCQ of the source input X, LDPC codes are used to implement Slepian-Wolf coding of the quantized source input Q(X) given the side information Y at the decoder. Assuming ideal Slepian-Wolf coding in the sense of achieving the theoretical limit H (Q(X)|Y), it is shown that Slepian-Wolf coded TCQ (SWC-TCQ) performs 0.2 dB away from the Wyner-Ziv distortion-rate function D/sub WZ/*(R) at high rate. This result mirrors that of entropy-coded TCQ in classic source coding and establishes the connection between performances of high-rate Wyner-Ziv coding and classic source coding. Practical designs with TCQ, irregular LDPC codes (for Slepian-Wolf coding) and optimal estimation at the decoder perform 0.83 dB away from D/sub WZ/*(R) at medium bit rates (e.g., /spl ges/ 2.3 b/s). With 2-D trellis-coded vector quantization, the performance gap to D/sub WZ/*(R) is only 0.66 dB at 1.0 b/s and 0.47 dB at 3.3 b/s. |
| Starting Page | 825 |
| Ending Page | 829 |
| File Size | 376077 |
| Page Count | 5 |
| File Format | |
| ISBN | 0780381041 |
| DOI | 10.1109/ACSSC.2003.1292028 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-11-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Parity check codes Decoding Source coding Lattices Channel coding Computer science Mirrors Bit rate Vector quantization |
| Content Type | Text |
| Resource Type | Article |
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