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arXiv 0903.0307cs.ITmath.IT
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极化码是有损信源编码的最佳选择

Polar Codes are Optimal for Lossy Source Coding

Satish Babu Korada, Rudiger Urbanke

摘要:

我们考虑使用极化码和低复杂度连续编码算法对二进制对称源进行有损源压缩。Arikan最近指出,极化码在连续解码策略下实现了任意对称二进制输入离散无记忆信道的容量。我们给出了有损源压缩的等效结果,即,我们表明,这种组合实现了二进制对称源的速率失真界。我们进一步证明了极化码对各种问题的最优性,包括二进制Wyner-Ziv和二进制Gelfand-Pinsker问题

英文摘要:

We consider lossy source compression of a binary symmetric source using polar codes and the low-complexity successive encoding algorithm. It was recently shown by Arikan that polar codes achieve the capacity of arbitrary symmetric binary-input discrete memoryless channels under a successive decoding strategy. We show the equivalent result for lossy source compression, i.e., we show that this combination achieves the rate-distortion bound for a binary symmetric source. We further show the optimality of polar codes for various problems including the binary Wyner-Ziv and the binary Gelfand-Pinsker problem

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