METHOD AND DEVICE FOR PREDICTIVE PICTURE ENCODING AND DECODING

METHOD AND DEVICE FOR PREDICTIVE PICTURE ENCODING AND DECODING

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FRANCOIS, Edouard, HIRON, Franck, CHEVANCE, Christophe
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung: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.