Title:
METHOD AND DEVICE FOR PREDICTING CHROMA BLOCK
Document Type and Number:
WIPO Patent Application WO/2020/038378
Kind Code:
A1
Abstract:
Provided by the present invention are a method and device for predicting a chroma block. The method comprises: searching for a value of a luminance point in an adjacent region of a luminance block corresponding to a current chroma block, so as to obtain an extreme luminance value, the adjacent region comprising a region of an adjacent row above the luminance block in a template-related region, and the horizontal coordinate position of each luminance point searched for in the region of the adjacent row above the luminance block is aligned with the horizontal coordinate position of a corresponding chroma point in a chrominance image; acquiring a value of a chroma point corresponding to the extreme luminance value; acquiring a linear model coefficient according to the extreme luminance value and the value of the chroma point; and acquiring a prediction value of the current chroma block according to the linear model coefficient and a reconstruction value of the luminance block. The present invention may reduce the complexity of a linear mode and improve the efficiency of a chroma coding mode.
Inventors:
MA XIANG (CN)
YANG HAITAO (CN)
CHEN JIANLE (CN)
XU WEIWEI (CN)
YANG HAITAO (CN)
CHEN JIANLE (CN)
XU WEIWEI (CN)
Application Number:
PCT/CN2019/101657
Publication Date:
February 27, 2020
Filing Date:
August 20, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H04N11/04; H04N19/176
Foreign References:
| CN103688533A | 2014-03-26 | |||
| CN103260018A | 2013-08-21 | |||
| CN103563383A | 2014-02-05 | |||
| CN104247422A | 2014-12-24 | |||
| CN104255033A | 2014-12-31 | |||
| CN103096057A | 2013-05-08 | |||
| CN103227917A | 2013-07-31 | |||
| US20080175490A1 | 2008-07-24 |
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