IEEE Trans Image Process - Mode-dependent templates and scan order for H.264/AVC-based intra lossless coding.

Tópicos

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Resumo

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.

Resumo Limpo

hadvanc video code avc lossless code lossi code share entropi code modul howev entropi coder havc standard origin design lossi video code yield adequ perform lossless video code paper analyz problem current lossless code scheme propos modedepend templat mdtemplat base method intra lossless code explor statist redund predict residu havc intra predict mode zero coeffici generat design new scan order mdtemplat scan coeffici sequenc fit havc entropi coder better fast implement algorithm also design littl comput increas experiment result confirm propos fast algorithm achiev bit save compar current havc fidel rang extens high profil

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