Frame Rate Conversion Using Interpolated Pixel Direction Analysis
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Solution Overview
Problem
Existing frame rate conversion techniques struggle to achieve smooth movement of images during conversion, particularly when increasing frame rates, leading to inconsistent object movement and difficulty in displaying extended definition images.
Innovation Solution
The technique involves inserting interpolated frames generated using information from at least three frames, with the direction of interpolation determined by analyzing the sum of differences between pixels on multiple straight lines passing through these frames, allowing for accurate movement direction detection and smoother image transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the same frame is repeated multiple times to increase frame rate, then the frame rate is increased, but the movement smoothness deteriorates
Solution Approach 1:
The patent performs preliminary analysis of pixel differences between adjacent frames to predict movement direction and magnitude before generating interpolated frames. By pre-calculating the sum of absolute differences along multiple straight lines and determining the direction with minimum difference, the system prepares movement compensation data in advance, enabling smooth frame rate conversion without simply repeating static frames.
2Ease of manufacture
If frame rate conversion is performed by repeating frames, then the conversion process is simple, but the object movement consistency deteriorates
Solution Approach 1:
The patent changes the parameter of frame generation from static repetition to dynamic interpolation based on pixel difference analysis. By calculating the sum of absolute differences between corresponding pixels on straight lines connecting adjacent frames and selecting the direction with minimum difference, the system dynamically adjusts interpolated frame content to maintain object movement consistency while achieving frame rate conversion.
3Device complexity
If interpolated frames are generated using only two adjacent frames, then the processing is simpler, but the interpolation accuracy deteriorates
Solution Approach 1:
The patent performs preliminary buffering of multiple adjacent frames (at least three frames) before interpolation is needed. By storing previous, current, and next frames in memory and pre-calculating pixel difference sums along multiple straight lines, the system prepares accurate movement prediction data in advance, enabling higher interpolation accuracy without excessive processing complexity during real-time conversion.
Data Source
AI summary
The present invention provides a technique relating to a frame rate conversion which enables display of an image of extended definition by smoothening the movement of the image. Therefore, the invention fixes the direction of interpolation using information on a first frame which appeared before the insertion time of the interpolated frame, a second frame appeared before the first frame, a third frame appeared after the insertion time, and a fourth frame appeared after the third frame, based on the insertion time of the interpolated frame. The interpolated pixel is generated from pixels of the second frame and the third frame located in the direction of interpolation, and generates the interpolated frame. Then, the interpolated frame is inserted into the inputted image signal to convert the frame rate.