Method and device for optimizing encoding/decoding of compensation offsets for a set of reconstructed samples of an image
AssigneeCanon Kabushiki Kaisha
InventorsGuillaume Laroche, Christophe Gisquet, Edouard Francois, Patrice Onno
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Abstract
The present invention provides a method and a device for coding and decoding at least a part of an image comprising a plurality of samples, each sample comprising at least two components, and the encoded image comprising at least one filtering parameter. The filtering comprises using at least one filtering parameter as a common filtering parameter for filtering both the first component and the second component of a reconstructed sample.
Claims43
A method of encoding at least a part of an image comprising a plurality of samples, each sample comprising at least two components, the encoded image comprising at least one filtering parameter, the method comprising:
- encoding a first chroma component and a second chroma component of at least one sample of the image to provide at least one encoded sample;
- decoding the at least one encoded sample;
- computing the at least one filtering parameter as a function of the difference between at least one chroma component of the at least one sample of the image and the at least one corresponding chroma component of the at least one corresponding decoded sample, the at least one filtering parameter being computed so as to be used in a loop filter as a common filtering parameter for sample adaptive offset loop filtering both the first and second chroma components of a decoded sample.
(canceled)
A method of decoding at least a part of an image comprising a plurality of samples, each sample comprising at least two components, the encoded image comprising at least one filtering parameter, the method comprising:
- decoding a first chroma component and a second chroma component of at least one encoded sample to provide a first chroma component and a second chroma component of at least one reconstructed sample;
- decoding the at least one filtering parameter;
- sample adaptive offset loop filtering the at least one reconstructed sample in a loop filter, the filtering comprising using at least one decoded filtering parameter as a common filtering parameter for filtering both the first chroma component and the second chroma component of the at least one reconstructed sample.
(canceled)
(canceled)
An encoding device for encoding at least a part of an image comprising a plurality of samples, each sample comprising at least two components, the encoded image comprising at least one filtering parameter, the encoding device comprising:
- an encoding unit which encodes a first chroma component and a second chroma component of at least one sample of the image to provide at least one encoded sample;
- a decoding unit which decodes the at least one encoded sample;
- a computing unit which computes the at least one filtering parameter as a function of the difference between at least one chroma component of the at least one sample of the image and the at least one corresponding chroma component of the at least one corresponding decoded sample, the at least one filtering parameter being computed so as to be used in a loop filter as a common filtering parameter for sample adaptive offset loop filtering both the first and second chroma components of a decoded sample.
A decoding device for decoding at least a part of an image comprising a plurality of samples, each sample comprising at least two components, the encoded image comprising at least one filtering parameter, the decoding device comprising:
- a sample decoding unit which decodes a first chroma component and a second chroma component of at least one encoded sample to provide a first chroma component and a second chroma component of at least one reconstructed sample;
- a parameter decoding unit which decodes the at least one filtering parameter;
- a filtering unit which sample adaptive offset loop filters the at least one reconstructed sample in a loop filter, the filtering comprising using at least one decoded filtering parameter as a common filtering parameter for filtering both the first chroma component and the second chroma component of the at least one reconstructed sample.
(canceled)
Dependencies are inferred from the claim text.