Three-dimensional lookup table based color gamut scalability in multi-layer video coding

A video processing device for processing multi-layer video data, the device comprising:

• a memory configured to store the multi-layer video data;
• and
• one or more processors in communication with the memory and configured to:
• generate at least one three-dimensional (3D) lookup table for color gamut scalability, wherein the at least one 3D lookup table has a size that is different for a luma component than for a first chroma component and a second chroma component,
• perform color prediction using the at least one 3D lookup table to convert color data of a reference picture in a first color gamut for a lower layer of the video data to a second color gamut for a higher layer of the video data, and
• generate at least one inter-layer reference picture for the higher layer of the video data based on the converted color data.

A video processing device for processing multi-layer video data, the device comprising:

• means for generating at least one three-dimensional (3D) lookup table for color gamut scalability, wherein the at least one 3D lookup table has a size that is different for a luma component than for a first chroma component and a second chroma component;
• means for performing color prediction using the at least one 3D lookup table to convert color data of a reference picture in a first color gamut for a lower layer of the video data to a second color gamut for a higher layer of the video data;
• and
• means for generating at least one inter-layer reference picture for the higher layer of the video data based on the converted color data.

A computer-readable storage medium storing instructions for processing multi-layer video data that, when executed, cause one or more processors to:

• generate at least one three-dimensional (3D) lookup table for color gamut scalability, wherein the at least one 3D lookup table has a size that is different for a luma component than for a first chroma component and a second chroma component;
• perform color prediction using the at least one 3D lookup table to convert color data of a reference picture in a first color gamut for a lower layer of the video data to a second color gamut for a higher layer of the video data;
• and
• generate at least one inter-layer reference picture for the higher layer of the video data based on the converted color data.