Color gamut adaptation with feedback channel

A method of processing video data, the method comprising:

• sending, by a source device and through a video interface, first video data to a sink device that supports high dynamic range (HDR) and wide color gamut (WCG), the first data having first color gamut settings including a first one or more color settings outside of color gamut capabilities of the sink device;
• responsive to sending the first video data that includes the first one or more color settings outside of the color gamut capabilities of the sink device , receiving, by the source device, from the sink device, and through a feedback channel of the video interface, preferred color gamut settings of the sink device for content received from the source device, wherein the preferred color gamut settings include a multi-segment 3D volume description of a preferred color gamut of the sink device that supports HDR and WCG;
• adapting, by the source device, second video data using the preferred color gamut settings;
• and
• sending, by the source device and through the video interface, the second video data adapted to the preferred color gamut settings to the sink device, the second video data having second color gamut settings including a second one or more color settings within the color gamut capabilities of the sink device and not including the first one or more color settings outside of the color gamut capabilities of the sink device.

An apparatus for processing video data, the apparatus comprising:

• a memory configured to store the video data;
• and
• a processor implemented using circuitry, the apparatus configured to:
• receive, through a video interface, first video data having first color gamut settings from a source device, the first color gamut settings including a first one or more color settings outside of color gamut capabilities of the sink device;
• responsive to receiving the first video data that includes the first one or more color settings outside of the color gamut capabilities of the sink device, send, to the source device through a feedback channel of the video interface, preferred color gamut settings of the apparatus for content received from the source device, wherein the preferred color gamut settings include a multi-segment 3D volume description of a preferred color gamut of the apparatus that supports high dynamic range (HDR) and wide color gamut (WCG);
• and
• receive, through the video interface and based at least in part on the preferred color gamut settings, second video data having second color gamut settings from the source device, the second color gamut settings including a second one or more color settings within the color gamut capabilities of the sink device and not including the first one or more color settings outside of the color gamut capabilities of the sink device.

A non-transitory computer-readable storage medium having instructions stored thereon that, when executed, configure an apparatus for processing video data to:

• receive, through a video interface, first video data having first color gamut settings from a source device, the first color gamut settings including a first one or more color settings outside of color gamut capabilities of the apparatus;
• responsive to receiving the first video data that includes the first one or more color settings outside of the color gamut capabilities of the apparatus, send, to the source device through a feedback channel of the video interface, preferred color gamut settings of the apparatus for content received from the source device, wherein the preferred color gamut settings include a multi-segment 3D volume description of a preferred color gamut of the apparatus that supports high dynamic range (HDR) and wide color gamut (WCG);
• and
• receive, through the video interface and based at least in part on the preferred color gamut settings, second video data having second color gamut settings from the source device, the second color gamut settings including a second one or more color settings within the color gamut capabilities of the apparatus and not including the first one or more color settings outside of the color gamut capabilities of the apparatus.