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US 2019/0356925 A1Published application
Systems and methods for providing 3d look-up table coding for color gamut scalability
AssigneeVid Scale, Inc.
InventorsYan Ye, Jie Dong, Yuwen He
Life of this patent
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Abstract
Systems and methods for improving efficiency in three-dimensional (3D) look-up table (LUT) coding and/or reducing table size of a 3D LUT may be provided. For example, octants associated with the 3D LUT may be provided for color space segmentation and coding may be performed on an octree associated with the octants where coding may include encoding nodes of the octree associated with the octants and corresponding vertices of the 3D LUT belonging to the nodes. The 3D LUT may also be signaled (e.g., based on a sequence and/or picture level).
Claims21
1-23. (canceled)
A method comprising:
- receiving, for a current picture in a video sequence, a color mapping table prediction mode indication for predicting a current color mapping table for the current picture, wherein the current color mapping table is partitioned into a plurality of segments, a segment corresponding to a portion of a color space, the current color mapping table having a plurality of color mapping coefficient parameters that are associated with various vertices of the plurality of segments;
- determining, based on the color mapping table prediction mode indication associated with the current picture, a color mapping predictor for predicting at least one vertex in the current color mapping table;
- and
- reconstructing at least one color mapping coefficient parameter of the current color mapping table for the current picture based on the determined color mapping predictor.
1 more element
A video decoding device comprising:
- a processor configured to:
- receive, for a current picture in a video sequence, a color mapping table prediction mode indication for predicting a current color mapping table for the current picture, wherein the current color mapping table is partitioned into a plurality of segments, a segment corresponding to a portion of a color space, the current color mapping table having a plurality of color mapping coefficient parameters that are associated with various vertices of the plurality of segments;
- determine, based on the color mapping table prediction mode indication associated with the current picture, a color mapping predictor for predicting at least one vertex in the current color mapping table;
- and
- reconstruct at least one color mapping coefficient parameter of the current color mapping table for the current picture based on the determined color mapping predictor.
2 more elements
Dependencies are inferred from the claim text.