Frame Rate Up Conversion Using Luminance Difference Overdrive
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Solution Overview
Problem
Existing frame rate up conversion (FRUC) techniques face challenges in accurately estimating motion vectors, leading to motion blur issues in LCD panels due to the delay in liquid crystals' response time.
Innovation Solution
A method and apparatus for FRUC that involves detecting luminance information in consecutive video frames, generating adjusting information based on luminance differences between current and preceding/succeeding frames, and using an overdrive controller with a compensation circuit and frame generator to produce new output frames, effectively reducing motion blur by increasing the frame rate and enhancing luminance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If frame rate up conversion is performed using traditional motion estimation methods, then the frame rate is increased, but the motion blur problem persists due to inaccurate motion vectors
Solution Approach 1:
The patent changes the parameter used for motion estimation from traditional complex motion vectors to simple luminance differences between frames. This parameter change simplifies the estimation process while maintaining effectiveness in reducing motion blur, as luminance differences directly correlate with motion without requiring complex vector calculations.
Solution Approach 2:
The patent uses a simple, computationally inexpensive luminance difference calculation instead of complex motion estimation algorithms. This 'cheap' approach uses readily available luminance data from consecutive frames to generate adjusting information, avoiding the high computational cost of traditional motion vector estimation while achieving the desired frame rate up conversion.
2Duration of action of moving object
If luminance overdrive is applied to reduce motion blur, then the response time is improved, but the luminance accuracy may be compromised
Solution Approach 1:
The patent applies luminance overdrive as a preliminary action before the LCD panel renders the frame. By calculating the luminance difference between the current frame and the previous frame, and applying this difference as an adjusting value to the pixel values, the liquid crystals are pre-conditioned to reach the target luminance faster, effectively reducing motion blur without compromising final luminance accuracy.
Data Source
AI summary
A method for frame rate up conversion. The method is executed by a frame rate up-converter. The frame rate up-converter receives a plurality of consecutive input video frames and detects luminance information for a current frame. The frame rate up-converter generates a first output frame according to the luminance information for the current frame and a preceding frame before the current frame and generates a second output frame according to the luminance information for the current frame and a succeeding frame after the current frame, wherein the second output frame is outputted after the first output frame.