BD-J Dynamic Range Switching for SDR and HDR Compatibility
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Solution Overview
Problem
Current Blu-ray disc technologies face challenges in setting and handling dynamic ranges, particularly with the introduction of high dynamic range (HDR) extensions, as existing standards do not adequately support the necessary functionality for reproducing devices to switch between standard dynamic range (SDR) and HDR images.
Innovation Solution
An information processing device and method that includes a setting unit to set the dynamic range of an image and a generation unit to generate the image in the specified dynamic range, utilizing extended Blu-ray Disc Java (BD-J) classes to manage and switch between SDR and HDR, enabling compatibility with both SDR and HDR monitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HDR extension is performed to handle images in multiple dynamic ranges, then the capability to reproduce images in SDR and HDR is improved, but the complexity of the reproducing device increases
Solution Approach 1:
The BD-J execution unit is designed to execute multiple types of BD-J classes (first BD-J classes for SDR and second BD-J classes for HDR) within a single device. This multi-functionality allows the reproducing device to handle both SDR and HDR images without requiring separate dedicated systems, thereby improving adaptability while managing complexity through unified processing architecture.
Solution Approach 2:
The system dynamically selects which BD-J class to execute based on the content requirements and display capabilities. The BD-J execution unit can switch between executing first BD-J classes (for SDR) and second BD-J classes (for HDR) depending on the situation, enabling flexible adaptation to different dynamic range requirements without permanent hardware reconfiguration.
2Adaptability or versatility
If multiple BD-J classes are introduced to support both SDR and HDR, then the adaptability to different display devices is improved, but the difficulty of detecting and measuring dynamic range settings increases
Solution Approach 1:
The system incorporates detection means that identify whether a BD-J object is to be reproduced in SDR or HDR before execution. This feedback mechanism allows the reproducing device to determine the appropriate BD-J class to execute based on the detected requirements, simplifying the detection process through predefined detection criteria rather than complex analysis.
Solution Approach 2:
The BD-J execution unit acts as an intermediary between the content source and the display device. It receives BD-J objects, detects their requirements, selects the appropriate execution path (SDR or HDR), and processes them accordingly. This intermediary function simplifies the overall detection and measurement process by centralizing the decision-making logic within the execution unit.
Data Source
AI summary
There is provided an information processing device, an information processing method, a program, and a recording medium that make it possible to set a dynamic range of an image to be reproduced. A Java setting unit sets a dynamic range of an image to be reproduced. A generation unit generates the image to be reproduced in the dynamic range set by the Java setting unit. The present disclosure can be applied, for example, to a reproducing device or the like that reproduces an optical disk that records an AV stream of a main video in a standard dynamic range (SDR) and an AV stream of a main video in a high dynamic range (HDR).