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Polar Codes are Optimal for Lossy Source Coding

机译:极地代码对于有损源编码是最佳的

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摘要

We consider lossy source compression of a binary symmetric source using polar codes and a 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 multiterminal problems including the binary Wyner-Ziv and the binary Gelfand-Pinsker problems. Our results extend to general versions of these problems.
机译:我们考虑使用极性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最近表明,极性码在连续解码策略下可以达到任意对称二进制输入离散无记忆通道的容量。我们展示了有损源压缩的等效结果,即展示了这种组合实现了二进制对称源的速率失真范围。我们进一步展示了极性码对于各种多终端问题(包括二进制Wyner-Ziv和二进制Gelfand-Pinsker问题)的最优性。我们的结果扩展到这些问题的一般版本。

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