Polar codes are optimal for lossy source coding

  • Authors:
  • Satish Babu Korada;Rüdiger L. Urbanke

  • Affiliations:
  • School of Computer and Communication Sciences, EPFL, Lausanne, Switzerland;School of Computer and Communication Sciences, EPFL, Lausanne, Switzerland

  • Venue:
  • IEEE Transactions on Information Theory
  • Year:
  • 2010

Quantified Score

Hi-index 754.84

Visualization

Abstract

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.