- 专利标题： A METHOD AND A DEVICE FOR PICTURE ENCODING AND DECODING
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申请号： EP23158005.1申请日： 2018-03-15
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公开(公告)号： EP4207759A1公开(公告)日： 2023-07-05
- 发明人: FRANCOIS, Edouard , CHEVANCE, Christophe , HIRON, Franck
- 申请人： InterDigital VC Holdings, Inc.
- 申请人地址： US Wilmington, DE 19809 200 Bellevue Parkway Suite 300
- 代理机构： Interdigital
- 优先权： EP17305411 20170407
- 主分类号： H04N19/126
- IPC分类号： H04N19/126 ; H04N19/136 ; H04N19/50 ; H04N19/176 ; H04N19/196 ; H04N19/117 ; H04N19/186 ; H04N19/182 ; H04N19/82
摘要：
A method for encoding a block of a picture is disclosed. The method comprises for at least one sample of the block and for one current component:
- obtaining a prediction value;
- determining a mapped residual value from a source value of the sample and from the prediction value responsive to a mapping function; and
- encoding the mapped residual value into a bitstream;
wherein the mapping function is derived to obtain at least one of a reduction of a bit cost of the bitstream for a given quality of reconstruction or an increase of quality of reconstruction for a given bit cost of the bitstream.
- obtaining a prediction value;
- determining a mapped residual value from a source value of the sample and from the prediction value responsive to a mapping function; and
- encoding the mapped residual value into a bitstream;
wherein the mapping function is derived to obtain at least one of a reduction of a bit cost of the bitstream for a given quality of reconstruction or an increase of quality of reconstruction for a given bit cost of the bitstream.
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