SL-HDR Pixel Value Reduction for Lower-Energy HDR Display
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Solution Overview
Problem
HDR video display consumes significantly more energy than SDR video, posing a challenge in reducing energy consumption while maintaining the quality of experience (QoE) and artistic intent of the content.
Innovation Solution
A method involving pre-processing of SDR content to generate energy-aware HDR content, with metadata signaling energy reduction information, and adaptive display techniques to adjust peak luminance based on display capabilities, thereby reducing energy consumption without compromising QoE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HDR video is displayed to provide better quality of experience, then image quality and dynamic range are improved, but energy consumption increases significantly
Solution Approach 1:
The patent applies dynamics by making the display content adaptive - switching between HDR and SDR modes based on scene characteristics and energy constraints. The system dynamically adjusts whether to display energy-intensive HDR content or energy-efficient SDR content, creating a flexible solution that balances quality and consumption requirements
Solution Approach 2:
The patent changes the dynamic range parameter of the displayed content by providing both HDR and SDR versions of the same video content. The receiving device can select between these different parameter versions (HDR vs SDR) based on energy consumption requirements, thereby resolving the contradiction between quality and energy use
2Use of energy by moving object
If SDR content is pre-processed to reduce peak luminance, then energy consumption is reduced, but image quality and artistic intent may be compromised
Solution Approach 1:
The patent applies preliminary action by pre-processing the SDR video content before transmission to reduce its peak luminance values. This preprocessing step prepares the content in advance to be more energy-efficient when displayed, while the system later compensates for any quality loss by switching to HDR mode when appropriate, thus maintaining both energy efficiency and image quality
Solution Approach 2:
The patent introduces an intermediary approach by providing both pre-processed SDR content and original HDR content. The receiving device acts as an intermediary that can select between these two versions based on energy requirements, allowing the system to balance energy consumption with image quality preservation through intelligent selection
Data Source
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AI summary
A method comprising: obtaining (601) a reconstructed version of a second standard dynamic range (SDR) content and SL-HDR metadata allowing generating a first high dynamic range (HDR) content from first SDR content, the SL-HDR metadata comprising energy-aware information comprising a flag indicating that the first SDR content has been pre-processed to obtain the second SDR content, the second SDR content allowing obtaining an energy reduction either for displaying the second SDR content with respect to an energy consumed for displaying the first SDR content or for displaying an output HDR content generated from the second SDR content with respect to an energy consumed for displaying an output HDR content generated from the reconstructed version of the first SDR content; determining (602) from the energy-aware information whether to regenerate an output SDR content corresponding to the first SDR content from the second SDR content or to keep the second SDR content as the output SDR content; obtaining (603) an intermediate SDR content from the output SDR content based on the determining; and, generating (604) an output HDR content from the output SDR content.