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Gaussian Multiple Description Coding with Low-Density Generator Matrix Codes
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DOI：10.1109/TCOMM.2012.12.100562.png)
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Abstract
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It is shown that the coding problem for an arbitrary point on the dominant face of an L-description El Gamal-Cover (EGC) region can be converted to that for a vertex of a K-description EGC region for some K <= 2L - 1, where the latter problem can be solved via successive coding. A practical scheme is proposed for the quadratic Gaussian case by reducing each step in successive coding to a Gaussian quantization operation and implementing such an operation using low-density generator matrix codes. The effectiveness of this scheme is verified through extensive simulation experiments.
Keywords:
Lossy source coding
low-density generator matrix
message-passing algorithm
multiple description coding
quantization splitting
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