Optical Disc Data Structure for Multi-Path Video Management
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Solution Overview
Problem
There is a lack of an effective data structure for managing the reproduction of video and audio data on high-density read-only optical disks, such as Blu-ray ROM, which limits flexibility and organization in playback.
Innovation Solution
A data structure architecture that includes path management information and chapter management information, allowing for the identification of playlists, playitems, and chapter entry flags to manage multiple reproduction paths and chapters, enabling flexible reproduction of video data by specifying reproduction paths and chapters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional data structure without path management information is used, then the structure is simple, but the flexibility in managing multiple reproduction paths is poor
Solution Approach 1:
The data structure is segmented into distinct functional components: path management information (identifying reproduction paths), chapter management information (identifying chapters within paths), and playlist information (identifying playitems). This segmentation allows the system to manage complex multiple reproduction paths while maintaining organizational clarity and enabling flexible navigation without overwhelming complexity.
Solution Approach 2:
The patent introduces a new dimensional layer of path management information that overlays the traditional playlist structure. Instead of merely linear playlist sequencing, the system adds a path dimension that allows parallel reproduction paths to be defined and managed, enabling multi-angle or multi-version content delivery within the same data structure framework.
2Ease of operation
If detailed path and chapter management information is added, then navigation capability is improved, but the data structure becomes more complex
Solution Approach 1:
Navigation functionality is segmented into distinct operational layers: path selection (choosing among multiple reproduction paths), chapter selection (choosing specific chapters within a path), and playitem selection (choosing specific scenes or segments within chapters). This segmentation improves ease of operation by providing clear hierarchical navigation steps while managing data structure complexity through organized information grouping.
Solution Approach 2:
The data structure pre-organizes all navigation information (paths, chapters, playitems) in advance during content authoring. This preliminary organization enables users to navigate complex multi-path content without real-time processing complexity, as the navigation framework is already established and ready for straightforward user selection.
3Adaptability or versatility
If multiple reproduction paths are supported, then content versatility is improved, but the management complexity increases
Solution Approach 1:
Content versatility is achieved through segmentation of reproduction paths, where each path is independently defined and managed. The path management information structure allows multiple parallel paths to coexist without interfering with each other, enabling different camera angles, language versions, or content variants to be organized separately while maintaining uniform management procedures.
Solution Approach 2:
The path management information structure serves multiple functions simultaneously: it identifies reproduction paths, organizes chapter information within paths, and coordinates playlist playback across paths. This multi-functionality reduces overall management complexity by consolidating what could be separate management systems into a unified framework that handles all aspects of multi-path content delivery.
Data Source
AI summary
The data structure for managing reproduction of at least video data recorded on the recording medium may include, for example, path management information for managing reproduction of the multiple reproduction path video data recorded on the recording medium. The path management information indicates at least one playlist belonging to each reproduction path. The data structure further includes at least one playlist file identified by the path management information recorded in a playlist area of the recording medium. The playlist file identifies at least one playitem, and each playitem identifies a clip of the multiple reproduction path video data. The data structure may includes chapter management information for managing reproduction of the video data by chapters. In one example, the chapter management information is recorded in the playlist files.