HDR Video Reproduction with Display-Adaptive Brightness Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Content with a wide dynamic range of brightness, suitable for high-brightness monitors, cannot be accurately displayed on standard monitors due to compression during authoring, leading to a deterioration in dynamic range.
Innovation Solution
A reproduction device that reads and decodes coded data from a recording medium, utilizing brightness characteristic and conversion information to adjust video brightness based on the display device's capabilities, ensuring appropriate brightness display on both high and standard monitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If video is compressed on the premise of standard brightness (100 nit) during authoring, then compatibility with standard monitors is improved, but dynamic range is deteriorated
Solution Approach 1:
The video content is segmented into multiple versions: HDR version with wide dynamic range and SDR version with standard dynamic range. The reproduction device selectively outputs the appropriate version based on display device capabilities, preserving dynamic range information while maintaining compatibility
Solution Approach 2:
Brightness conversion definition information is prepared in advance during authoring, including conversion parameters and lookup tables. This preliminary preparation enables efficient runtime conversion between HDR and SDR without compromising the original dynamic range
2Manufacturing precision
If brightness conversion is performed based on display device performance information, then display quality on high-brightness monitors is improved, but system complexity increases
Solution Approach 1:
The reproduction device acquires performance information from the display device (such as maximum brightness capability) and uses this feedback to automatically select appropriate brightness conversion parameters, enabling adaptive optimization without complex manual configuration
Solution Approach 2:
The system changes brightness parameters dynamically based on display device capabilities. By adjusting conversion parameters such as white point luminance and transfer characteristics, the system optimizes display quality across different monitor types without requiring complex hardware modifications
3Manufacturing precision
If extended video with wide dynamic range is output without adjustment, then image quality is improved, but compatibility with standard monitors deteriorates
Solution Approach 1:
The reproduction device dynamically adjusts brightness conversion based on real-time detection of display device capabilities. The system can switch between different conversion modes (HDR to SDR, or HDR to HDR with adjusted parameters) to optimize both image quality and compatibility for each specific display device
Data Source
AI summary
A display device includes circuitry configured to transmit, to a reproduction device, display-capability information representing performance characteristics of the display device. The circuitry receives video data from the reproduction device that includes brightness-characteristic information and information of a master video when the display-capability information represents a display performance of the video data. The circuitry displays an image of the received video data in accordance with brightness designated by the received information, and adjusts the image brightness based on the display device's performance. When the master video is high-dynamic-range (HDR) video data, the circuitry recognizes the HDR content and displays the image in accordance with brightness characteristics of the master video.