Mode Dependent Vector Quantization with a rate-distortion optimized codebook for residue coding in video compression
Bihong Huang, Félix Henry, Christine Guillemot, Philippe Salembier
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.
BibTeX
@inproceedings{icassp2015_modedependentvec,
title = {Mode Dependent Vector Quantization with a rate-distortion optimized codebook for residue coding in video compression},
author = {Bihong Huang and Félix Henry and Christine Guillemot and Philippe Salembier},
booktitle = {ICASSP 2015},
year = {2015}
}