Mode dependent vector quantization with a rate-distortion optimized codebook for residue coding in video compression

Abstract : The High Efficiency Video Coding standard (HEVC) supports a total of 35 intra prediction modes which aim at reducing spatial redundancy by exploiting pixel correlation within a local neighborhood. In this paper, we show that spatial correlation remains after intra prediction, leading to high energy prediction residues. We propose a novel scheme for encoding the prediction residues using a Mode Dependent Vector Quantization (MDVQ) which aims at reducing the redundancy in residual domain. The MDVQ codebook is optimized in a rate-distortion (RD) sense. Experimental results show that the codebook can be independent of the quantization parameter (QP) with no loss in terms of coding efficiency. A bitrate reduction of 1:1% on average compared to HEVC can be achieved, while further tests indicate that codebook adaptivity could substantially improve the performance
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Bihong Huang, Felix Henry, Christine Guillemot, Philippe Salembier. Mode dependent vector quantization with a rate-distortion optimized codebook for residue coding in video compression. IEEE Intl. Conf. on Acoustics and Signal Processing (IEEE-ICASSP), Apr 2015, Brisbane, Australia. ⟨hal-01204768⟩

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