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Title:
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Mode dependent vector quantization with a rate-distortion optimized codebook for residue coding in video compression
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Author:
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Huang, Bihong; Henry, Felix; Guillemot, Christine; Salembier Clairon, Philippe Jean
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. GPI - Grup de Processament d'Imatge i Vídeo |
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Abstract:
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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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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo
-Àrees temàtiques de la UPC::So, imatge i multimèdia::Creació multimèdia::Vídeo digital
-Video compression
-Image processing
-HEVC
-Intra prediction
-Residue coding
-Vector quantization
-Compressió de vídeo
-Imatges -- Processament |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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