Optical Disc Interleaved Unit Addressing for Seamless Reproduction
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Solution Overview
Problem
Current optical disc technologies face challenges in efficiently accessing and reproducing video information without navigation packets, particularly in high-density storage formats where the reproduction entry point is within an interleaved block, leading to difficulties in identifying the next interleaved unit for seamless reproduction.
Innovation Solution
The implementation of an information record medium that uses an object data file and an object information file, where the object data is interleaved by packet units and the object information file stores relationship definition information and unit address information, allowing for efficient reproduction of content without navigation packets by referencing the interleaved units directly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If time map (ES address information) is used to access video information without navigation packets, then storage capacity and record density are improved, but the ability to identify the next interleaved unit for seamless reproduction is lost
Solution Approach 1:
The patent applies preliminary action by pre-storing the address of the head packet of each interleaved unit in the object information file before reproduction occurs. This allows the reproduction apparatus to directly access the correct interleaved unit without needing to reproduce navigation packets during playback, thereby maintaining reproduction continuity while eliminating navigation packets.
Solution Approach 2:
The patent introduces an intermediary mechanism (object information file containing ILVU head packet address information) that mediates between the time map and the interleaved units. This intermediary stores the necessary address information to enable direct access to interleaved units without requiring navigation packets, thus resolving the contradiction between storage efficiency and reproduction reliability.
2Volume of stationary object
If navigation packets are removed to increase storage capacity, then record density is improved, but the response time for accessing interleaved units increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the addresses of head packets of all interleaved units in the object information file during the recording phase. This preparation work is done in advance, so during reproduction, the apparatus can immediately access any interleaved unit without time-consuming searches or navigation packet processing, thus reducing response time while maintaining high storage capacity.
3Measurement precision
If address information for each interleaved unit is stored in navigation packets, then access accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by separating the address information storage function from the navigation packets. The object information file is divided into specific data structures (ILVU tables) that store head packet addresses for each interleaved unit independently. This segmentation allows precise access to interleaved units while simplifying the overall reproduction control structure by eliminating the need for navigation packets.
Solution Approach 2:
The patent extracts the address information function from the navigation packets and places it in the object information file. By taking out this specific function, the patent eliminates the complexity of navigation packet processing while maintaining accurate access to interleaved units through the dedicated address storage structure in the object information file.
Data Source
AI summary
An information record medium includes a file for storing object data composing of a plurality of packets and further includes an object information file for storing corresponding definition information to control reproduction of the object data. The object data is interleaved in an angle block and the object information file further stores unit address information to indicate an address of each interleaved unit.