Multi-Angle Data Storage Interleaving and Jumping-Point Indexing
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Solution Overview
Problem
Conventional DVD technology faces limitations in storing and reproducing multi-angle data, as it requires significant time to change locations between angles due to non-contiguous recording and limited bit-rate compensation, especially in optical disks and hard disks.
Innovation Solution
The solution involves recording motion picture data for different angles as interleaved units with designated access points on an information storage medium, along with a controller that stores jumping-point information in a separate area, allowing seamless angle changes and random access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-angle data is recorded using an interleaving method with non-contiguous recording, then multiple angles can be stored on the same storage medium, but the time required to change locations between angles increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing optimal jumping-point information in a separate area of the storage medium before reproduction. This allows the reproduction apparatus to quickly locate and switch between interleaved angle data without performing complex real-time searches, thereby reducing location change time while maintaining multi-angle storage capability
Solution Approach 2:
The patent introduces an intermediary element - a separate storage area containing jumping-point information - that mediates between the interleaved multi-angle data and the reproduction apparatus. This intermediary provides pre-computed location information that enables fast angle switching without requiring the apparatus to search through the interleaved data structure directly
2Ease of operation
If jumping-point information is stored in the motion picture bit-stream, then angle change information is readily available, but the bit-rate is limited and cannot compensate for the time required to change locations
Solution Approach 1:
The patent extracts the jumping-point information from the motion picture bit-stream and stores it in a separate area of the storage medium. This separation allows the jumping-point information to be optimized independently from the video data bit-rate constraints, enabling faster location changes while maintaining ease of angle change operation
3Quantity of substance
If data is divided into predetermined units and recorded in turns, then storage efficiency is improved, but random access capability is reduced
Solution Approach 1:
The separate jumping-point information acts as an intermediary index structure that enables random access to the interleaved data units. Without this intermediary, random access would require sequential searching through the interleaved data, but the jumping-point information provides direct access paths while maintaining the space-efficient interleaved storage structure
Data Source
AI summary
An information storage medium which stores data structures supporting multi-angles includes clip AV streams for respective angle data of multi-angle motion picture data. As additional information for each clip AV stream, clip information is recorded on a separate storage area from that of the clip AV streams. The clip information includes jumping-point information for jumping into another angle. Each of the clip AV streams may be recorded in a contiguous recording area, or divided into smaller interleaved units that are interleaved with units of the other clip AV streams.