Video Source Device Frame Interval Prediction for Display Quality
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Solution Overview
Problem
Existing techniques for varying refresh rates do not adequately consider the impact of frame cycle variations on image quality, leading to potential deterioration in video display performance.
Innovation Solution
A video display system that includes a video source device and a display device, with a frame interval information processing unit that calculates and transmits frame interval information, allowing the display device to adjust its display scanning periods and compensate for variations in frame cycles, thereby maintaining high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the refresh rate is varied to match drawing processing time, then the display performance is improved by preventing frame repetition, but the image quality deteriorates due to fluctuation in video display state
Solution Approach 1:
The video source device performs preliminary calculation of frame interval information (time from current frame output to next frame output) and transmits it to the display device in advance. This allows the display device to prepare and adjust its display scanning periods before the actual display occurs, enabling smooth transition and maintaining image quality during refresh rate changes.
Solution Approach 2:
The system establishes a feedback loop where the video source device continuously monitors drawing processing time and adjusts the frame interval information accordingly. This feedback mechanism ensures that the display device receives accurate timing data to synchronize its scanning periods with the actual frame output rate, preventing display artifacts while maintaining image quality.
2Adaptability or versatility
If the frame cycle is varied for each frame to match drawing time, then the drawing processing is optimized, but the display panel experiences image quality deterioration due to variable frame intervals
Solution Approach 1:
The frame interval information is calculated and transmitted in advance of each frame's display. This preliminary action allows the display device to anticipate the timing of subsequent frames and adjust its scanning periods accordingly, maintaining stable image quality even when frame cycles vary between frames.
Solution Approach 2:
The system dynamically adjusts the display scanning periods based on the received frame interval information. Instead of using fixed scanning intervals, the display device adapts its scanning timing to match the variable frame output rate, enabling the system to handle different drawing processing times while maintaining consistent image quality.
Data Source
AI summary
A video display with high image quality is achieved even when a frame cycle varies for each frame. A video display system includes a video source device 11 which outputs a video signal and a display device 12 which displays a video based on a video signal output from the video source device 11. The video source device 11 includes a drawing time prediction unit 104 and a transmitting unit 102. The drawing time prediction unit 104 calculates frame interval information indicating an interval from when a video signal of a first frame is output to when a video signal of a second frame to be a next frame of the first frame is output. The transmitting unit 102 transmits the frame interval information calculated by the drawing time prediction unit 104 to the display device 12.