Reproduction Device Timing Adjustment for Metadata Synchronization
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Solution Overview
Problem
Existing methods for displaying video content face challenges in synchronizing image processing with dynamic metadata, leading to potential misapplication of metadata to incorrect images, especially during scene changes.
Innovation Solution
A reproduction device and display device system that adjusts the timing of image data and metadata output to ensure that image processing is applied correctly to each image, using techniques such as obtaining and adjusting timing differences via EDID and pilot signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dynamic metadata is transmitted for each picture to enable accurate image processing, then image processing accuracy is improved, but timing synchronization becomes difficult to maintain
Solution Approach 1:
The system performs preliminary actions by transmitting pilot signals and metadata in advance before the actual picture data. The reproduction device uses these preliminary transmissions to determine timing differences and establish synchronization relationships, ensuring that when picture data arrives, the corresponding metadata is already prepared and timing-adjusted for accurate image processing.
2Measurement precision
If timing adjustment mechanisms are implemented to synchronize metadata with pictures, then processing accuracy is improved, but system complexity increases
Solution Approach 1:
The system introduces pilot signals as intermediary elements that facilitate timing synchronization between metadata and picture data. These pilot signals act as mediators that carry timing information and enable the reproduction device to calculate and adjust timing differences without requiring complex direct synchronization mechanisms between all system components.
3Speed
If metadata is transmitted without timing adjustment, then transmission speed is maintained, but metadata may be applied to incorrect images
Solution Approach 1:
The system implements feedback mechanisms where the reproduction device receives timing difference information from the transmission device based on pilot signal analysis. This feedback loop allows the system to continuously adjust and refine the timing synchronization of metadata transmissions, ensuring that metadata is reliably applied to the correct pictures while maintaining efficient transmission speeds.
Data Source
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AI summary
There is provided a reproduction device (100) that outputs a video signal to a display device (200) via predetermined communication, the video signal including a video having pictures and corresponding pieces of image characteristic information. The reproduction device includes: an obtaining unit (110) that obtains a first time difference between a timing at which the display device displays one picture among the pictures and a timing used by the display device to display one of the pieces of image characteristic information corresponding to the one picture; an adjuster (120) that adjusts at least one of a timing at which the pictures are outputted and a timing at which the pieces of image characteristic information are outputted to reduce the first time difference; and an output unit (130) that outputs the pictures and the pieces of image characteristic information via the predetermined communication at the time adjusted by the adjuster.