HDMI Look Data Metadata for Display Adaptation
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Solution Overview
Problem
Current video content delivery systems lack the ability to adapt color decisions for optimal display across different usage practices and display types, such as front projection, direct view, and portable displays, as a single color decision is made without considering variations in display devices and creative intents.
Innovation Solution
A method and system for generating and transmitting metadata over a high definition multimedia interface (HDMI) to alter video content before display, accounting for variations in display devices and creative intents, using Look Data Elementary Messages and metadata transmission preparation devices to ensure optimal display attributes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single color decision is made for video content delivery, then the content creation process is simplified, but the ability to adapt to different display devices and usage practices is lost
Solution Approach 1:
The patent segments the color decision process into two parts: a master color decision made during content creation and multiple derived color decisions generated for different display devices. The color transformation module divides the single color decision into device-specific color decisions by applying different transformation matrices (e.g., HDR to SDR transformations) for different display types such as front projection, direct view, and portable displays.
Solution Approach 2:
The system transitions from a static single color decision to a dynamic multi-color decision system. The color transformation module dynamically generates appropriate color decisions based on the detected display device type and usage practice. The module can switch between different color transformation matrices and processing paths depending on whether the display is HDR or SDR, front projection or direct view, thereby adapting the color decision in real-time.
2Manufacturing precision
If different color decisions are made for different display types, then optimal display quality is achieved for each device, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple color transformation matrices and processing parameters in the color transformation module. These pre-configured transformations (e.g., HDR to SDR, front projection specific, direct view specific) are ready to be applied immediately when the display device type is detected, eliminating the need for complex real-time calculations while achieving optimal display quality for each device type.
Solution Approach 2:
The color transformation module serves as an intermediary between the master color decision and the final display output. It mediates by applying appropriate transformation matrices and processing algorithms to convert the master color decision into device-specific color decisions, thereby achieving optimal display quality without requiring the entire system to be overly complex.
3Adaptability or versatility
If metadata is generated and transmitted for each video content to account for display variations, then adaptability is improved, but the data transmission burden increases
Solution Approach 1:
The patent extracts only the essential transformation parameters and color decision information needed for display adaptation into compact metadata structures. Rather than transmitting complete video content or extensive configuration data, the system extracts and transmits only the necessary color transformation matrices, transformation types, and associated metadata, significantly reducing the data transmission burden while maintaining adaptability.
Solution Approach 2:
The system changes parameters by representing color transformation information through compact parameter sets (e.g., transformation matrix coefficients, bit depth values, color space identifiers) rather than transmitting full-color lookup tables or extensive lookup data. This parameter-based approach reduces metadata size while preserving the necessary adaptability information for different display devices.
Data Source
AI summary
A method and system are provided for look data definition and transmission over a high definition multi-media interface (HDMI). The method includes generating metadata for video content. The metadata is used for altering the video content before display thereof by accounting for variations between different display devices and variations between different creative intents by a content creator. The method further includes preparing the video content and the metadata for transmission over a high definition multimedia interface.