Optical Disc Playlist Management via Hierarchical Data Segmentation
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Solution Overview
Problem
Conventional recording and playback apparatuses face challenges in user-friendly management of playlists, resume playback functionality, and navigation display speed, particularly when using optical discs with low read-write speeds and large storage capacities, where users cannot arbitrarily rearrange playlist orders and processing times increase significantly with larger storage capacities.
Innovation Solution
The introduction of a management unit and upper management layer that handles all playlist information as integrated information, enabling user-defined playback ranges and resume playback control, along with pre-generated thumbnails for high-speed navigation display, allows for flexible playlist management and efficient data retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If optical disc is used as recording medium, then large storage capacity is achieved, but read-write speed becomes slow
Solution Approach 1:
The management information is segmented into multiple layers (first management layer and second management layer). The second management layer stores detailed playlist information while the first management layer stores simplified reference information, allowing fast access to playlist orders without reading entire playlist data from the optical disc.
Solution Approach 2:
The patent introduces a hierarchical management structure with two management layers, adding a dimensional aspect to data organization. This layered approach separates frequently accessed metadata (playlist orders) from bulk data (AV data and detailed playlist information), enabling efficient navigation on large-capacity optical discs.
2Adaptability or versatility
If detailed playlist information is stored for each playlist, then flexible playback control is achieved, but processing time increases with larger storage capacities
Solution Approach 1:
Playlist management information is divided between two layers: the first management layer stores essential playlist order information for quick access, while the second management layer stores detailed AV data and complete playlist information. This segmentation allows the system to perform navigation and playback control using only the compact first layer data, significantly reducing processing time on large-capacity media.
Solution Approach 2:
The system pre-generates and stores simplified management information in the first management layer that contains all necessary data for playlist navigation and playback control. This preliminary preparation eliminates the need to process large volumes of data during actual playback operations, reducing real-time processing requirements.
3Adaptability or versatility
If multiple management layers are introduced for playlist management, then user-defined playback ranges are enabled, but device complexity increases
Solution Approach 1:
The management information is segmented into two distinct layers with clearly defined functions. The first management layer handles high-level playlist ordering and navigation, while the second management layer manages detailed AV data and playlist content. This functional segmentation enables complex user-defined playback ranges without requiring a monolithic complex management system.
Solution Approach 2:
By introducing a hierarchical dimension to management information storage, the patent enables sophisticated playback control capabilities. The multi-layer structure allows users to define playback ranges across different playlists and time points while maintaining organized data access patterns that prevent exponential complexity growth.
Data Source
AI summary
A recording method for recording received digital broadcasting on a medium, wherein system resume information including an operation mode at the time of playback and resume information for each piece of program information are separately recorded in a management file as resume information. This makes it possible to provide a recording method that allows the user to perform desired Resume Playback.