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1. (WO2013155886) METHOD AND APPARATUS OF SIMPLIFIED LUMA-BASED CHROMA INTRA PREDICTION

Pub. No.:    WO/2013/155886    International Application No.:    PCT/CN2013/070912
Publication Date: Fri Oct 25 01:59:59 CEST 2013 International Filing Date: Fri Jan 25 00:59:59 CET 2013
IPC: H04N 7/32
Applicants: MEDIATEK SINGAPORE PTE. LTD.
HSU, Juliana
GUO, Mei
GUO, Xun
Inventors: HSU, Juliana
GUO, Mei
GUO, Xun
Title: METHOD AND APPARATUS OF SIMPLIFIED LUMA-BASED CHROMA INTRA PREDICTION
Abstract:
A method and apparatus for chroma intra prediction based on reconstructed luma pixels and chroma pixels are disclosed. The chroma intra prediction is based on a linear model of derived co-located current luma pixels of the current luma block scaled by a scaling factor. The scaling factor comprises a product term of a division factor and a scaled covariance-like value associated with neighboring reconstructed luma and chroma pixels of a current block. The division factor is related to a first data range divided with rounding by a scaled variance-like value associated with the neighboring reconstructed luma pixels of the current block. The scaled covariance-like value, the first data range, or both of the scaled covariance-like value and the first data range are dependent on the internal bit depth, with which the chroma signal is processed during video coding process, according to an embodiment of the present invention.