System and method for a multi-primary wide gamut color system
Inventors
Bogdanowicz, Mitchell J. • Carbonara, Corey P. • Korpi, Michael F. • DeFilippis, James M. • Mandle, Gary B.
Assignees
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Publication Number
US-12387651-B2
Publication Date
2025-08-12
Expiration Date
Abstract
The present invention includes systems and methods for a multi-primary color system for display. A multi-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. One embodiment of the multi-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.
Core Innovation
The disclosure presents an encoding and decoding pipeline for a six-primary color system using RGBCMY and explicitly distinguishes between non-constant luminance encoding and constant luminance encoding. It describes a processing flow that includes OETF/EOTF processing, packing and unstacking of color components, inverse quantization, and reconstruction of RGBCMY components from encoded representations.
In the described pipeline, luminance difference subtractions are used to reconstruct color components, including use of an E−Y′ component. The pipeline further includes chromaticity/luminance conversion and matrix-based output for legacy RGB compatibility, with explicit gamut and white-point handling for ITU-R BT.709-6 (D65) and SMPTE RP431-2 (D60) in the described conversions.
The encoding and transport portion maps and transports color data into standardized serial formats, including SMPTE ST424/ST425, ST292, ST2082, ST2022, and ST2110, with payload identification and flags and sample-order substitutions. It also describes packing into ICtCp/ITP color spaces via XYZ→LMS→OETF transfer functions, and includes display-system embodiments such as video wall controller splitting, cropping, scaling, and location-based routing to multiple display devices.
Claims Coverage
Independent claims are identified in the provided relevant set as clm-00001, clm-00014, and clm-00019. Across these independent claims, the coverage centers on rendering image data based on CIE Yxy primary color signals and transmitting processed Yxy data channels (luminance Y, and two chromaticity coordinates x and y) to display devices, with dependent refinements related to the portion of rendered data, cropping, scaling, calibration signaling, and a moving-stage display mechanism.
Render and transmit primary color signals in CIE Yxy as processed Y-channel and chromaticity channels
The system processes graphics, renders image data in a set of primary color signals corresponding to values in a CIE Yxy color space including luminance (Y) and two colorimetric coordinates (x and y), and transmits rendered data including processed Yxy data with a first channel related to luminance (Y), a second channel related to x, and a third channel related to y to display devices for display.
Image display signal including a portion of rendered image display data
The system transmits an image display signal that includes a portion of rendered image display data to the display device, where the image display signal includes processed Yxy data with first, second, and third channels related to Y, x, and y, and the display device displays the rendered image display data.
Render and transmit processed Yxy rendered image display data to display devices
The system processes graphics to render image data represented by a set of primary color signals corresponding to CIE Yxy values including luminance (Y) and two colorimetric coordinates (x) and (y), and transmits rendered image display data including processed Yxy data with channels related to Y, x, and y to display devices for display.
The independent claims provided focus on expressing primary color signals in CIE Yxy, rendering the image data, and transmitting processed Yxy data as separate channels for luminance (Y) and two chromaticity coordinates (x and y) to one or more display devices. Additional refinement captured by dependents in the provided set includes determining the transmitted portion based on display-device location and including cropping, scaling, and a calibration signal, as well as a moving stage for changing visibility of a display element.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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