Video Interface Feedback Channel for Color Gamut Adaptation
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Solution Overview
Problem
Current digital video systems face challenges in optimizing color gamut settings between source and sink devices, leading to sub-optimal color output and increased processing complexity due to mismatched color gamuts, especially when handling high dynamic range (HDR) and wide color gamut (WCG) video data.
Innovation Solution
Implementing a feedback channel in video interfaces to communicate preferred color gamut settings from sink devices to source devices, allowing the source devices to adapt video data to align with the sink device's color gamut capabilities, thereby reducing the need for complex transformations and improving decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sink device sends preferred color gamut settings through a feedback channel to the source device, then color representation accuracy is improved, but device complexity increases due to the additional feedback channel requirement
Solution Approach 1:
The patent implements a feedback channel that allows the sink device to communicate its preferred color gamut settings back to the source device. This feedback mechanism enables the source device to adapt its video data encoding to match the sink device's color capabilities, thereby improving color representation accuracy while managing device complexity through standardized feedback protocols
2Manufacturing precision
If the source device adapts video data to the sink device's color gamut settings, then color output quality is improved, but processing complexity increases
Solution Approach 1:
The source device performs color gamut adaptation in advance during the video encoding process, converting video data to match the sink device's preferred color gamut settings before transmission. This preliminary action ensures optimal color output quality at the destination while distributing the processing complexity to the source device rather than the sink device
3Measurement precision
If complex color gamut transformations are performed, then color accuracy is improved, but power consumption increases
Solution Approach 1:
The system optimizes power consumption by dynamically adjusting color gamut transformation parameters based on the sink device's capabilities. When the source device and sink device share compatible color gamut settings, minimal or no transformation is performed, significantly reducing power consumption while maintaining color accuracy when transformations are necessary
4Manufacturing precision
If the system transmits extensive metadata for color gamut information, then color gamut adaptation precision is improved, but information transmission overhead increases
Solution Approach 1:
The patent extracts and transmits only the essential color gamut metadata parameters needed for adaptation, such as preferred color gamut settings and transformation parameters, rather than transmitting complete color space descriptions. This selective extraction maintains color gamut adaptation precision while minimizing information transmission overhead
Data Source
AI summary
In general, this disclosure describes techniques for communicating preferred color gamut settings from a sink device to a source device. The source device may send, through a video interface, first video data to the sink device, which receives the first video data through the video interface. The sink device may then send, through a feedback channel of the video interface, preferred color gamut settings of the sink device to the source device. The preferred color gamut settings may be for content received from the source device. The source device may adapt second video data using the preferred color gamut settings. The source device may then send, through the video interface, the second video data adapted to the preferred color gamut settings to the sink device.