Playlist Structure for Seamless 2D to 3D Playback Mode Switching
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Solution Overview
Problem
When switching playback modes from 2D to 3D, existing systems face challenges in maintaining language attributes and stream selection consistency, leading to inconvenient user experiences due to the need for re-setting stream numbers and potential compatibility issues with conventional playback devices.
Innovation Solution
A recording medium with a playlist information structure that includes both a basic stream selection table for monoscopic playback and an extension stream selection table for stereoscopic playback, allowing seamless mode switching while maintaining stream numbers and language attributes, ensuring compatibility with both 2D and 3D playback devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stream selection procedure is executed when switching from 2D to 3D playback mode, then the stream numbers are updated for 3D playback, but the language attribute changes and stream needs to be set again
Solution Approach 1:
The stream selection table is segmented into a basic stream selection table (for 2D playback) and an extension stream selection table (for 3D playback). This segmentation allows the system to maintain separate stream configurations for different playback modes while using a unified selection procedure, thereby avoiding the need to re-set streams when switching modes.
Solution Approach 2:
The extension stream selection table is prepared in advance with stream numbers that correspond to the basic stream selection table. This preliminary arrangement ensures that when 3D playback mode is activated, the stream selection procedure can directly use the pre-configured extension table without requiring additional stream setting operations.
2Adaptability or versatility
If separate stream selection tables are used for 2D and 3D playback, then mode-specific stream configuration is achieved, but the system complexity increases
Solution Approach 1:
The basic stream selection table and extension stream selection table are merged into a single playlist information structure. The extension table extends the basic table by adding stereoscopic playback-specific stream configurations while maintaining the same organizational structure and selection procedure, thus increasing adaptability without significantly increasing complexity.
3Ease of operation
If the same stream selection procedure is used for both 2D and 3D playback, then user operation is simplified, but mode-specific stream requirements cannot be met
Solution Approach 1:
The stream selection procedure is designed to be universal by accepting both the basic stream selection table and the extension stream selection table as valid inputs. This multi-functionality allows the same procedure to handle both 2D and 3D playback mode requirements without modification, simplifying user operation while maintaining mode-specific stream support.
Data Source
AI summary
The recording medium 100 stores playlist information and a plurality of elementary streams. The playlist information includes a basic stream selection table and an extension stream selection table. The basic stream selection table shows elementary streams that are permitted to be played back in a monoscopic playback mode. The extension stream selection table shows elementary streams that are permitted to be played back only in a stereoscopic playback mode. The stream entry in the extension stream selection table indicates a packet identifier that is to be used by the playback device to perform demultiplexing when the playback device is in the stereoscopic playback mode and the corresponding stream number is set in the stream number register provided in the playback device.