Display Control Apparatus for HDR-SDR Dynamic Range Adaptation
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Solution Overview
Problem
Existing display technologies face inefficiencies when trying to display High Dynamic Range (HDR) images on devices that only support Standard Dynamic Range (SDR), as they often require unnecessary processing even when both HDR and SDR images are present in the same file.
Innovation Solution
A display control apparatus that analyzes image files to determine the dynamic range of both main and sub images, converting the main image's dynamic range if necessary to match the display device's capabilities, while outputting sub images separately if they have a different dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dynamic range conversion process is carried out for both HDR and SDR images in an image file, then the display device can display images on devices with different dynamic range capabilities, but the processing becomes inefficient and redundant
Solution Approach 1:
The patent segments the image data into main image and sub image components with different dynamic ranges. The analysis unit separately identifies HDR image data and SDR image data within the same image file, allowing the system to process only the necessary components based on display device capabilities, thereby avoiding redundant conversion operations while maintaining broad display compatibility
Solution Approach 2:
The patent implements dynamic processing by having the control unit adaptively select which image data to output based on real-time detection of display device capabilities. The system dynamically adjusts between outputting HDR data, SDR data, or converted data without unnecessary conversion, optimizing processing efficiency while maintaining versatility across different display devices
2Reliability
If the main image is converted to match the display device's dynamic range, then the image can be displayed correctly on devices with limited dynamic range support, but additional processing time and computational resources are required
Solution Approach 1:
The patent applies preliminary action by embedding both HDR and SDR image data in the image file during the recording phase. This pre-prepared approach ensures that when the image is displayed, the system can directly output the appropriately formatted data without requiring real-time conversion, thus maintaining display accuracy while minimizing processing time
Solution Approach 2:
The patent utilizes parameter changes by storing image data in different dynamic range parameters (HDR and SDR) simultaneously within the same image file. The control unit detects the display device's dynamic range capability and selects the matching parameter set, avoiding the need for time-consuming conversion while ensuring accurate display
Data Source
AI summary
An apparatus comprises an analyzer that analyzes a file, a convertor that converts dynamic range of image data, and a controller that outputs image data in the file to a display on the basis of the analysis, wherein the controller outputs a main image in the file to the display device if the display supports the dynamic range of the main image, outputs sub image to the display device if the display does not support the dynamic range of the main image and the sub image is included in the file, and uses the converter to convert the main image into image data having a dynamic range supported by the display to output the image data obtained through the conversion if the display does not support the dynamic range of the main image and the sub image is not included in the file.