| JCTVC-M0285 Non-SCE1: Chroma-like coding of enhancement layer luma intra mode in SHVC [J. Xu, A. Tabatabai (Sony)]
In this contribution, luma intra mode coding of enhancement layer in SHVC is reportedly simplified and aligned with chroma intra coding. The number of allowed modes is reduced to 5 from 33+2 of the original luma intra coding modes. These 5 modes include collocated base layer luma intra mode as one candidate and the coding of luma intra mode is follows similar approach as chroma intra mode coding, namely: a flag indicates the derived mode as collocated base layer intra mode. If not, a 2-bit FLC is encoded for remaining 4 modes. Experimental results reportedly show that proposed algorithm has BD-BR saving −0.27% and −0.10% for Y in 2x and 1.5x AI configurations with over 15% less encoding time. With MDCS off, −0.17% and −0.10% for Y in 2x and 1.5x AI configurations with over 15% less encoding time.
Some similarity with the normative variation of M0115 was noted, in regard to the elimination of the availability of the encoder to choose some modes and the issues that arise from having that kind of constraint – and the introduction of dependence in the EL on the mode selection method in the BL. No non-normative variation of this proposal was investigated. The motivation here was to simplify the decoding process, with some actual gain shown. This constrains the ability of the encoder to choose some modes.
No action.
Dostları ilə paylaş: |
