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Mode-Dependent Templates and Scan Order for H.264/AVC-Based Intra Lossless Coding

2012; Institute of Electrical and Electronics Engineers; Volume: 21; Issue: 9 Linguagem: Inglês

10.1109/tip.2012.2197630

1941-0042

Zhouye Gu, Weisi Lin, Bu‐Sung Lee, Chiew Tong Lau, Ming–Ting Sun,

Advanced Vision and Imaging

In H.264/advanced video coding (AVC), lossless coding and lossy coding share the same entropy coding module. However, the entropy coders in the H.264/AVC standard were original designed for lossy video coding and do not yield adequate performance for lossless video coding. In this paper, we analyze the problem with the current lossless coding scheme and propose a mode-dependent template (MD-template) based method for intra lossless coding. By exploring the statistical redundancy of the prediction residual in the H.264/AVC intra prediction modes, more zero coefficients are generated. By designing a new scan order for each MD-template, the scanned coefficients sequence fits the H.264/AVC entropy coders better. A fast implementation algorithm is also designed. With little computation increase, experimental results confirm that the proposed fast algorithm achieves about 7.2% bit saving compared with the current H.264/AVC fidelity range extensions high profile.