HDR Video Dynamic Metadata for Variable Display Brightness
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Solution Overview
Problem
Existing video processing methods result in a loss of highly bright information when HDR videos are displayed on devices with peak brightness lower than the reference display brightness, affecting the display effect.
Innovation Solution
A video processing method that matches different dynamic metadata to different brightness scenes for multiple frames of images, adjusts the images using these metadata, and sends the HDR video to a second device for brightness mapping based on the device's peak brightness, ensuring appropriate display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If HDR video is encoded with fixed reference display brightness (1000 nits), then the video maintains consistent metadata, but devices with lower peak brightness cannot display highly bright information correctly
Solution Approach 1:
The patent applies dynamics by transitioning from static metadata to dynamic metadata that adapts to different display devices. The system determines the peak brightness of the target display device and adjusts the metadata accordingly, allowing the HDR video to be optimally displayed on devices with varying brightness capabilities while maintaining proper dynamic range information.
2Adaptability or versatility
If HDR video is displayed on devices with peak brightness less than reference display brightness, then the video can be played on lower-end devices, but highly bright information is lost
Solution Approach 1:
The patent applies parameter changes by modifying the metadata parameters based on the display device's peak brightness. The system calculates a brightness ratio between the device's peak brightness and the reference display brightness, then uses this ratio to adjust the metadata, ensuring that highly bright information is preserved and correctly mapped to the device's display capabilities.
3Manufacturing precision
If dynamic metadata is used to match different brightness scenes, then the display effect is improved, but the processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-determining the peak brightness of the display device and pre-calculating the appropriate metadata before video playback. This allows the system to prepare the correct metadata in advance, reducing real-time processing complexity during actual video display while maintaining high display precision.
Data Source
AI summary
Embodiments of this application provide a video processing method and apparatus. The method includes: receiving, by a first device, an operation of enabling photographing in a movie mode, where obtaining, by the first device, a first image sequence based on a camera in response to the operation of enabling photographing; performing, by the first device, encoding based on the first image sequence and first dynamic metadata corresponding to the first brightness scene, to obtain a first HDR video; obtaining, by a second device, the first HDR video from the first device; adjusting, by the second device, a brightness of the first HDR video based on a preset brightness, to obtain a second HDR video; and playing, by the second device, the second HDR video.