System and method for a six-primary wide gamut color system
Inventors
Assignees
Publication Number
US-11699376-B2
Publication Date
2023-07-11
Expiration Date
2039-10-21
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Abstract
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. A six-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 invention provides a system and method for implementing a six-primary, wide gamut color system for image display and processing. Unlike traditional display systems that utilize only three primary colors (Red, Green, Blue), this multi-primary system introduces three additional primaries: Cyan, Yellow, and Magenta. The multi-primary configuration is reflected in all stages of image data handling, including acquisition, conversion, encoding/decoding, and display. The system incorporates components such as a set of image data containing both RGB and CYM channel values, an image data converter with digital interface capabilities, transfer functions for bit-level and color management, and at least one display device compatible with the six-primary system.
A key aspect of the invention is maintaining compatibility with existing color systems and equipment. The system is configured to handle standardized transport formats and modifiable Session Description Protocol (SDP) parameters, which enables conversion between original and modified bit levels while accommodating both legacy and six-primary displays. Enhanced workflows are provided for capturing, processing, transporting, and displaying the extended color gamut. This integrated approach allows the additional primary data to be handled outside the display itself, addressing gaps in the prior art where multi-primary color handling was typically limited to display-internal processing.
The invention addresses significant limitations of conventional RGB systems by expanding color gamut, improving color consistency across different viewers, and minimizing metameric errors. By leveraging wide bandwidth, six-primary color data and transfer functions, the system offers more accurate color rendition and supports a wider range of real-world colors. The system supports real-time or near real-time conversion, can work with various digital and analog processes, and ensures that both legacy and upgraded equipment can operate together, facilitating a smoother industry transition toward more accurate color representation.
Claims Coverage
The patent contains three independent claims, each defining inventive features related to multi-primary (specifically six-primary) color image data processing, conversion, and display.
Multi-primary color image data system with conversion and standardized transport
A system for converting a multi-primary color system for display, comprising: - A set of image data including an original bit level, and both a first set of (RGB) color channel data and a second set of (CYM) color channel data. - An image data converter operable to convert the set of image data, including transforming the original bit level to an updated bit level. - At least one display device in communication with the image data converter. - A standardized transport format operable to receive the combined first and second sets of color channel data, maintaining the combined bit level equal to the original bit level. The claim further supports real-time or near real-time conversion, inclusion of transfer functions, electronic luminance components, digital interfaces for encoding and decoding, and establishing a magenta primary value based on the image data.
System including modifiable session description protocol (SDP) parameters
A system for converting a multi-primary color system for display, comprising: - A set of image data (original bit level, first (RGB) and second (CYM) color channel sets). - An image data converter and at least one display device. - A standardized transport format receiving combined color channel data at unchanged bit level. - A set of modifiable Session Description Protocol (SDP) parameters. The claim includes the ability for the image data converter to modify the bit level, and for SDP parameters to contain various data such as color channel data, mapping, framerate, sampling standard, flag indicator, picture size, timestamp, clock frequency, frame count, scrambling indicator, and video format. The claim also supports calculation and use of saturation data involving an illuminant white point, and assignment of bit values for black and white within color channel sets.
System with digital interface for encoding/decoding and combined color data handling
A system for converting a multi-primary color system for display, comprising: - A set of image data with an original bit level and first and second (RGB and CYM) color channel data sets. - An image data converter with a digital interface capable of encoding and decoding the set of image data. - At least one display device. - A standardized transport format able to receive the combined color channel data, maintaining bit level equivalence to the original. The claim further specifies the digital interface's capability to handle payload identification metadata, identifying sets as multi-primary image data, supporting color difference component processing for up-sampling and/or down-sampling, and utilizing transfer functions to quantize to a new bit level.
These inventive features enable comprehensive acquisition, bit-level conversion, encoding/decoding, transport, and display of image data with six color primaries, while maintaining compatibility with standardized formats and providing enhanced metadata and protocol support.
Stated Advantages
Extends the usable color gamut beyond that provided by current RGB systems.
Minimizes metameric errors, resulting in more consistent color sensation between viewers.
Provides compatibility and backwards compatibility with existing color systems and equipment.
Allows for acquisition, processing, transport, and storage of six-primary color image data outside the display.
Enables real-time or near real-time conversion of image data for display.
Supports integration with multiple existing standards and transport formats with minimal modification required.
Improves color consistency and repeatability compared to non-six-primary color systems.
Documented Applications
Use in display systems that require wide gamut and six-primary color output, including projectors, OLED monitors, LCD monitors, and direct emissive displays.
Acquisition and processing of image data using cameras and imaging devices adapted to handle six-primary channels.
Packaging and transmission of six-primary color image data through standard video and multimedia transport protocols such as SMPTE ST292, ST424, ST2082, ST2110, and HDMI/CTA-861.
Conversion and mapping of six-primary color image data into standardized formats for compatibility with both legacy and advanced color systems.
Integration and processing in computer and network-based distributed systems for image data handling.
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