Video Encoding Dynamic Range Chrominance Metadata
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Solution Overview
Problem
Current omnidirectional video standards primarily support rotational motion, failing to effectively encode and decode immersive video that includes translational movement, which limits the immersion and realism in virtual reality applications.
Innovation Solution
A method is introduced to adjust the dynamic range of the chrominance component during video encoding and decoding, using metadata to manage chrominance component scaling parameters, allowing for dynamic range changes and improvements in encoding efficiency and subjective image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the dynamic range of the chrominance component is expanded during encoding, then the subjective image quality is improved, but the complexity of the encoding process increases due to the need for metadata management
Solution Approach 1:
The patent changes the dynamic range parameter of the chrominance component from its original range to an expanded range during encoding. This parameter transformation improves image quality by preserving chrominance information that would otherwise be lost, while the associated metadata records the transformation parameters for accurate reconstruction during decoding
Solution Approach 2:
The patent introduces metadata as an intermediary element that carries information about the dynamic range transformation. This metadata acts as a bridge between the encoding process (where the dynamic range is expanded) and the decoding process (where the original dynamic range is restored), enabling quality improvement without permanent loss of compatibility
2Productivity
If metadata is used to manage chrominance component scaling parameters, then the encoding efficiency is improved, but the amount of data to be processed increases
Solution Approach 1:
The patent applies partial action by only encoding metadata for chrominance components that require dynamic range adjustment. Not all chrominance samples need full metadata treatment, and the system selectively applies the scaling parameters only where needed, improving efficiency while minimizing the overall data overhead
Solution Approach 2:
The patent performs preliminary encoding of the chrominance component scaling parameters during the main encoding process. By preparing and storing the metadata upfront during encoding rather than generating it during decoding or playback, the system improves overall processing efficiency and allows for optimized storage and transmission
Data Source
AI summary
A method of encoding video includes encoding a texture image, and encoding metadata for the texture image. A value of a chrominance sample expressed within an original dynamic range in the texture image is changed to a value within a changed dynamic range and encoded.