Video Frame Rate Conversion Using 5:3 Repetition Ratio
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Solution Overview
Problem
Existing video processing methods, such as 3:2 pull down, result in rough motion and image lag due to unequal timing lengths, requiring additional timing control circuits and causing compatibility issues with liquid crystal displays, while also being resource-intensive.
Innovation Solution
A video processing method that adjusts the proportion of first and second output frames to match the input frames, ensuring an integer multiple relationship without requiring timing control circuits, and adjusts brightness to create black or gray frames to eliminate motion artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If 3:2 pull down method is used to convert 24 Hz image data to 60 Hz, then the video processing can be achieved with simpler algorithm, but the motion of objects becomes rough and image lag occurs
Solution Approach 1:
The patent changes the frame repetition parameters from the conventional 3:2 ratio to a 5:3 ratio, where frames are repeated 5 times and 3 times respectively. This parameter modification balances the timing lengths of different frame types, ensuring that the total time for processing first frames equals the total time for processing second frames, thereby eliminating motion roughness and image lag while maintaining algorithm simplicity
Solution Approach 2:
The patent introduces dynamic timing adjustment by making the processing time of first frames and second frames equal through the 5:3 repetition ratio. This dynamic balance ensures that the video processing adapts to different frame types with equal timing length, solving the motion smoothness issue without requiring complex hardware timing control circuits
2Productivity
If timing control action is executed to adjust refresh frequency, then the frame proportion can be adjusted, but additional timing control circuits are required and panel compatibility issues occur
Solution Approach 1:
The patent employs a self-service approach where the video processing device automatically adjusts the frame repetition ratio to 5:3, making the timing lengths of first and second frames equal without requiring external timing control circuits. The system self-regulates the frame processing timing, eliminating the need for additional hardware and avoiding panel compatibility issues while maintaining efficient frame conversion
3Power
If frames are repeated with different proportions, then the output frequency can be adjusted, but the motion distance becomes large causing image doubling
Solution Approach 1:
The patent modifies the frame repetition parameters from conventional ratios to a specific 5:3 ratio, where the timing lengths of processed first frames and second frames are made equal. This parameter change ensures that objects moving between frames traverse equal distances, preventing motion doubling and image lag while achieving the desired output frequency conversion
Data Source
AI summary
A video processing method and a device thereof are described. The method includes the steps as follows. An input video signal is received, in which a single period of the input video signal has a plurality of first input frames and a plurality of second input frames. The input video signal is processed, so as to generate an output video signal, in which a single period of the output video signal has a plurality of first output frames and a plurality of second output frames, and an amount of the first output frames is the same as an amount of the second output frames. A sum of the amount of the first output frames and the amount of second output frames is an integer multiple of a sum of an amount of the first input frames and an amount of the second input frames.