Blu-ray Data Structure for Seamless Multi-Path Video Playback
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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 like Blu-ray ROM, which limits flexibility and seamless playback across different camera angles or versions.
Innovation Solution
A data structure that includes a DVP directory with a general information file, a PLAYLIST directory, a CLIPINF directory, and a STREAM directory, featuring entry point maps and path management information to align and manage multiple reproduction paths, allowing seamless switching between different camera angles or versions during playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional data structure is used for managing video data on high-density optical disks, then the disk format is simple and well-established, but the flexibility and seamless playback across different camera angles or versions cannot be achieved
Solution Approach 1:
The patent segments video data into multiple clips, each representing a different reproduction path (camera angle or version). The data structure divides video content into discrete manageable units that can be independently controlled and switched between, enabling flexible playback across different angles while maintaining organizational structure.
Solution Approach 2:
The patent introduces a new dimensional organization by adding path management information and entry point maps that map across multiple reproduction paths simultaneously. This creates a multi-dimensional data structure where video data is organized not just sequentially but across multiple parallel reproduction paths, enabling seamless switching between camera angles.
2Ease of operation
If multiple reproduction path video data is recorded on the disk, then seamless switching between camera angles becomes possible, but the data structure becomes more complex requiring additional management files and directories
Solution Approach 1:
The patent introduces path management information and entry point maps as intermediary structures that mediate between the user's playback requests and the actual video data stored in multiple clips. These intermediaries manage the complexity of multiple reproduction paths by providing a unified interface for seamless switching between camera angles without requiring direct complex management of all underlying data.
3Reliability
If entry point maps and path management information are added to manage multiple reproduction paths, then playback control and alignment across paths is improved, but the file structure and disk space requirements increase
Solution Approach 1:
The patent performs preliminary organization of video data into clips with associated entry point maps and path management information during the recording phase. This preliminary structuring enables reliable alignment and synchronization of multiple reproduction paths during playback without requiring complex real-time processing, as the organizational framework is established in advance.
Data Source
AI summary
The recording medium includes at least one data area storing more than one clip of video data for at least one segment of a title, and each clip of video data is associated with a different reproduction path of the segment.