Interleaved Multi-Component Stream Recording on High-Density Media
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Solution Overview
Problem
Current high-density optical disc standards, such as BD-RE and BD-ROM, do not allow for the addition or substitution of auxiliary streams associated with the main stream during recording or playback, limiting flexibility in managing and presenting multi-component data streams.
Innovation Solution
A method and apparatus that record and reproduce multi-component data streams by interleaving the main and auxiliary streams as logically-separated files on a high-density recording medium, allowing for the addition or substitution of auxiliary streams, with each interleaved unit sized according to the allocation units defined by the File Allocation Table (FAT), enabling flexible management and playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If main stream and auxiliary stream are multiplexed as a single clip file, then recording structure is simple, but auxiliary stream cannot be added or substituted
Solution Approach 1:
The patent divides the previously unified clip file structure into separate main stream clip file and auxiliary stream clip file. This segmentation allows independent management and replacement of auxiliary streams while maintaining the overall recording structure, resolving the contradiction between structural simplicity and auxiliary stream flexibility.
2Device complexity
If auxiliary stream is combined with main stream in a single file, then file management is simple, but original auxiliary stream cannot be replaced
Solution Approach 1:
The patent separates auxiliary stream data into independent clip files distinct from the main stream clip file. This allows the file management system to handle each stream independently, enabling replacement of auxiliary streams without affecting the main stream or requiring complex file structure modifications.
Solution Approach 2:
The patent introduces a playlist file as an intermediary that manages the association between main stream and auxiliary stream clip files. This playlist structure enables flexible replacement of auxiliary streams by simply updating the playlist references, without directly modifying the main stream file or creating complex file dependencies.
3Adaptability or versatility
If streams are recorded as separate files, then auxiliary stream can be replaced, but physical recording structure becomes complex
Solution Approach 1:
The patent resolves the physical structure complexity by introducing a logical management dimension through the playlist file. While physical files are separated for replaceability, the playlist creates a logical layer that simplifies access and management, effectively adding a dimension of organization that mitigates the perceived complexity of the physical structure.
Data Source
AI summary
The present invention records a main stream containing video contents and an auxiliary stream related therewith as logically-separated clip files on a recording medium. The logically-separated clip files, however, are interleaved on a physical recording area. Because the interleaved units of the auxiliary stream can be individually identified by a file system of the recording medium, the auxiliary stream recorded on the recording medium can be replaced with another one during reproduction or presentation.