Data Output Apparatus HDR Luminance Conversion Metadata
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Solution Overview
Problem
Current HDR technologies face challenges in maintaining compatibility with new HDR schemes without requiring changes to existing decoding apparatuses, particularly when transitioning from original HDR techniques to new ones, which can result in users needing to purchase new devices if the transmission format changes.
Innovation Solution
A data output apparatus and method that decode video streams, acquire metadata for conversion modes, interpret this metadata to generate control information, and convert the luminance range of video signals to ensure compatibility with both new and existing HDR schemes, allowing for seamless playback on various display devices without the need for new hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a new HDR transmission format is introduced, then HDR display quality is improved, but compatibility with existing decoding apparatuses deteriorates
Solution Approach 1:
The patent introduces metadata as an intermediary element that carries conversion mode information between the video stream and the decoding apparatus. This metadata enables the decoder to automatically adapt to different HDR formats without requiring hardware changes, thus maintaining compatibility while supporting new HDR transmission formats.
Solution Approach 2:
The patent implements dynamic conversion mode selection based on metadata interpretation. The decoding apparatus can dynamically switch between different luminance range conversion modes (first conversion mode for original HDR, second conversion mode for new HDR schemes) according to the metadata received, enabling adaptive compatibility without fixed hardware constraints.
2Adaptability or versatility
If conversion processing is performed to maintain compatibility, then device compatibility is improved, but processing complexity increases
Solution Approach 1:
The patent segments the conversion process into distinct modes (first conversion mode and second conversion mode) that can be independently selected based on metadata. This segmentation allows the system to perform only the necessary conversion processing for the specific HDR format being used, reducing unnecessary processing complexity while maintaining compatibility.
Solution Approach 2:
The decoding apparatus performs self-service by automatically interpreting metadata and selecting the appropriate conversion mode without external intervention. This automated decision-making process reduces the need for complex manual configuration and simplifies the overall processing architecture while ensuring compatibility.
3Adaptability or versatility
If luminance range conversion is performed, then compatibility with SDR displays is improved, but image quality may deteriorate
Solution Approach 1:
The patent applies parameter changes by adjusting luminance range conversion parameters based on the selected conversion mode. When converting to SDR, the system modifies luminance parameters according to the second conversion mode defined in the metadata, optimizing the conversion process to minimize image quality deterioration while ensuring display compatibility.
Data Source
AI summary
A data output apparatus includes: a video decoder that decodes a video stream to generate a first video signal; an external metadata acquisition unit that acquires one or more pieces of metadata corresponding to one or more first conversion modes; an HDR metadata interpreter that interprets one of the one or more pieces of metadata to acquire characteristic data and conversion auxiliary data; a DR converter that supports one or more second conversion modes and performs conversion processing of a luminance range of the first video signal based on the conversion auxiliary data to generate a second video signal; and an HDMI output unit that outputs the second video signal to a display apparatus.