Optical Disc Stream Arrangement for Buffer Capacity Reduction
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Solution Overview
Problem
Optical discs with interleaved 2D and 3D video streams require larger buffer capacities for seamless playback, as both streams need to maintain synchronized frame rates and presentation times, leading to inefficiencies in memory usage and increased costs due to the need for separate discs for 2D and 3D playback.
Innovation Solution
A recording medium with a stereoscopic/monoscopic shared area, a stereoscopic specific area, and a monoscopic specific area, where the base-view stream file is used for monoscopic playback and the dependent-view stream file for stereoscopic playback, allowing for separate optimization of extent sizes and arrangements for each type of playback, reducing the necessary buffer capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If interleaved arrangement of 2D and 3D video streams is used, then compatibility with both 2D and 3D playback devices is achieved, but buffer capacity requirements increase
Solution Approach 1:
The patent divides the video stream into separate base-view stream and dependent-view stream files, each with its own extents arranged in specific patterns. This segmentation allows independent optimization of each stream's buffer requirements while maintaining overall compatibility, resolving the contradiction between versatility and buffer capacity needs.
Solution Approach 2:
The patent applies different extent arrangement strategies to different areas of the optical disc - the stereoscopic/monoscopic shared area uses one arrangement pattern while the stereoscopic specific area uses another. This local differentiation allows each region to be optimized for its specific playback requirements, reducing overall buffer capacity demands.
2Reliability
If separate optical discs are produced for 2D and 3D video playback, then playback quality is ensured, but production cost increases
Solution Approach 1:
The patent creates a single optical disc that serves multiple functions - it can be played back on both 2D-only devices and 2D/3D capable devices. The disc includes both base-view and dependent-view streams with appropriate markers, allowing one disc to replace what would traditionally require two separate discs, thereby reducing production costs while maintaining playback quality.
Solution Approach 2:
The patent merges the 2D and 3D video stream files into a single optical disc structure. By combining the base-view stream and dependent-view stream with proper organization and marking, the system achieves space efficiency and cost reduction while ensuring both 2D and 3D playback capabilities are maintained.
3Reliability
If extent sizes are optimized for both 2D and 3D playback simultaneously, then seamless playback is achieved, but memory usage increases
Solution Approach 1:
The patent implements dynamic extent arrangement where the system can adaptively select different extent configurations based on the playback mode (2D or 3D). This dynamic approach allows the system to optimize memory usage for the current playback scenario rather than maintaining fixed large buffers for all scenarios, achieving seamless playback with reduced memory consumption.
Data Source
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AI summary
On a recording medium, stereoscopic and monoscopic specific areas are located one after another next to a stereoscopic/monoscopic shared area. The stereoscopic/monoscopic shared area is a contiguous area to be accessed both in stereoscopic video playback and monoscopic video playback. The stereoscopic specific area is a contiguous area to be accessed immediately before a long jump occurring in stereoscopic video playback. In both the stereoscopic/monoscopic shared area and the stereoscopic specific area, extents of base-view and dependent-view stream files are arranged in an interleaved manner. The extents on the stereoscopic specific area are next in order after the extents on the stereoscopic/monoscopic shared area. The monoscopic specific area is a contiguous area to be accessed immediately before a long jump occurring in monoscopic video playback. The monoscopic specific area has a copy of the entirety of the extents of the base-view stream file recorded on the stereoscopic specific area.