A Novel Rate-Adaptive Distributed Source Coding Scheme Using Polar Codes

Lv, Xiaoqian; Liu, Rongke; Wang, Runxin

doi:10.1109/lcomm.2012.120312.121536

Cited by 10 publications

(2 citation statements)

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“…Moreover, polar codes were proven to be optimal for lossy source compression and the binary WZ problem [10]. Several studies investigated the application of polar codes for the distributed source coding [11], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Distributed Video Coding Based on Polar Codes

2023

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In this letter we present an improved distributed video coding (DVC) scheme based on polar coding techniques. Firstly, we adapt log-likelihood ratios (LLRs) for DVC with integer implementation of a discrete cosine transform (DCT). We propose a computationally efficient and numerically stable modification of these LLRs based on the simplified methods of polar codes decoding. We show that on average this approach provides 0.3 dB PSNR gain for DVC with LDPC accumulated (LDPCA) codes. Secondly, we introduce the nested shortened polar codes construction algorithm. We demonstrate that replacement of LDPCA by polar codes improves PSNR by 0.1 dB on average, whereas, for videos with relatively high motion level, the gain reaches up to 0.23, 0.39 and 0.55 dB for Group of Pictures (GOP) lengths 2, 4 and 8 frames, respectively. Finally, experimental results demonstrate that DVC with polar codes and Tal-Vardy list decoder operates up to two times faster than DVC with LDPCA code and belief propagation (BP) decoder.

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Section: Introductionmentioning

confidence: 99%

Distributed Video Coding Based on Polar Codes

2023

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“…Hence the SW philosophy may be viewed as the complement of using a high-complexity encoder and a low-complexity decoder. The punctured turbo codes and polar codes based SW schemes were investigated for compressing two distributed correlated sources in [2] and [3], respectively.…”

Section: Introductionmentioning

confidence: 99%