Blu-ray Playback Control File for External Signal Integration
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Solution Overview
Problem
Current optical recording and reproducing apparatuses face limitations in seamlessly combining and reproducing external input signals with built-in Blu-ray disc playback signals, hindering the development of Blu-ray disc-based systems.
Innovation Solution
A method and apparatus for creating a playback control file that enables the combination and reproduction of stream files from both the recording medium and external sources, using virtual stream files and PlayLists with identification information to control and play back data, including original and additional elementary streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external input signals and built-in blu-ray disc playback signals are reproduced separately, then the reproduction system is simple to implement, but the system cannot combine and reproduce multiple data sources as a single unified output
Solution Approach 1:
The patent merges external input signals and built-in blu-ray disc playback signals into a single reproduction unit by creating a unified playback control file that integrates multiple stream files from different sources. This allows the system to treat separate data sources as one cohesive output stream, resolving the contradiction between combining multiple sources and maintaining system simplicity.
Solution Approach 2:
The playback control file structure is designed to be universal, capable of handling both external input signals and built-in blu-ray disc playback signals through the same reproduction mechanism. The Virtual PlayList and stream file architecture enables a single system to perform multiple functions (reproducing different signal types) without requiring separate dedicated systems for each signal source.
2Adaptability or versatility
If multiple stream files are reproduced individually, then the playback control structure is simple, but the system cannot reproduce combined data from recording medium and external sources as standardized information
Solution Approach 1:
The patent segments the playback control structure into hierarchical components: PlayList files that reference Virtual PlayLists, Virtual PlayLists that organize stream files, and stream files that contain actual data. This segmentation allows complex combined data reproduction while maintaining manageable control structures at each level, resolving the contradiction between standardized combined reproduction and control simplicity.
Solution Approach 2:
The Virtual PlayList acts as an intermediary layer between the PlayList control structure and the actual stream files from different sources. It standardizes the interface for combining external and built-in signals by providing a unified reference mechanism that simplifies how multiple stream files are integrated and reproduced as standardized information.
3Ease of operation
If a unified playback control file is created to combine multiple stream files, then seamless reproduction of combined data is achieved, but the file structure and control mechanism become more complex
Solution Approach 1:
The patent implements preliminary action by pre-organizing stream files into Virtual PlayLists and pre-establishing the hierarchical control structure before reproduction. This advance organization enables seamless playback during operation, as the complex integration work is completed beforehand, resolving the contradiction between ease of seamless playback and the complexity of setup.
Data Source
AI summary
A method of creating a playback control file for a recording medium and a method and apparatus for reproducing data using the playback control file are disclosed. The method of creating a playback control file for a recording medium includes creating a virtual stream file designating a group of stream files recorded on the recording medium, and creating a PlayList being able to reproduce the group of stream files, individually or in combination, the PlayList including a PlayItem directly designating the virtual stream file and identification information designating at least one of elementary streams included in the group of stream files.