Recording Medium Index Table for High Frame Rate Playback Compatibility
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Solution Overview
Problem
Conventional video recording technologies face issues with maintaining video quality when high frame rates are used, as they can overload existing playback devices, leading to inappropriate playback or device failure, which restricts the adoption of high-frame-rate video streams.
Innovation Solution
A recording medium that includes an index table, digital streams, playlist information, and control programs, which instruct playback devices to play back video streams at mandatory or optional frame rates, ensuring compatibility with older devices and preventing overload by excluding high-frame-rate playback paths from the playback target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If progressive pictures at high frame rate are recorded on the recording medium, then video quality is improved, but playback devices may be overloaded and fail to play back the video properly
Solution Approach 1:
The video content is segmented into multiple playback paths with different frame rates (e.g., 24P, 30P, 60P). The recording medium stores multiple versions of the same video content encoded at different frame rates, allowing playback devices to select the appropriate path based on their capabilities. This segmentation enables high-quality video to be available while maintaining compatibility with older devices.
Solution Approach 2:
The playback system dynamically selects the appropriate playback path based on the device's frame rate capabilities. The control program determines which playback path to use by checking the device's ability to handle specific frame rates, enabling the system to adapt to different device capabilities and avoid overloading older devices while providing high-frame-rate content to capable devices.
2Manufacturing precision
If progressive pictures at high frame rate are used, then video quality is improved, but compatibility with existing playback devices deteriorates
Solution Approach 1:
The recording medium is designed with multiple playback paths that serve different device types. By incorporating video content encoded at multiple frame rates (24P, 30P, 60P) and providing control programs that route to appropriate paths, the system achieves universal compatibility across older and newer playback devices while maintaining the option for high-frame-rate content.
Solution Approach 2:
The video content parameters (frame rate) are changed to create multiple versions suitable for different device capabilities. The recording medium stores the same video content encoded at different frame rates, and the control program selects the appropriate parameter set based on the playback device's capabilities, enabling broad compatibility while supporting advanced features.
3Productivity
If control programs include progressive-optional-rate playback paths, then high frame rate playback is enabled on capable devices, but older devices may experience playback failures
Solution Approach 1:
The control program acts as an intermediary that mediates between the high-frame-rate content and the playback device. It checks the device's capabilities and routes to appropriate playback paths, preventing capable devices from being restricted while protecting older devices from attempting to play back incompatible high-frame-rate content that would cause failures.
Data Source
AI summary
A recording medium on which video streams, control programs and index table are recorded. The video streams include video stream composed of progressive pictures and video stream composed of interlace pictures. The video stream composed of the progressive pictures has a mandatory rate or an optional rate. The index table indicates correspondence between titles and control programs. A control program corresponding to first play title and top menu title excludes a playback path, which specifies a playback of the progressive pictures in the video stream at the optional rate, from a playback target and instructs to perform a playback in accordance with another playback path.