GPU Motion Compensation for LCD Blur and Noise
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Solution Overview
Problem
Digital video sequences displayed on hold-type devices like LCDs appear blurry due to slow LC response and sample-and-hold driving techniques, and existing methods for compensating for motion blur are either invasive or suffer from noise amplification.
Innovation Solution
A system and method utilizing a graphics processing unit (GPU) to modify digital video sequences by estimating motion between frames and filtering pixels based on estimated motion to compensate for perceived blur, thereby enhancing sharpness without excessive noise amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If inverse filtering is used to compensate for motion blur, then sharpness perception is improved, but noise amplification occurs
Solution Approach 1:
The patent modifies video display parameters by applying motion compensation filtering that adapts to detected motion in the video sequence. Instead of using aggressive inverse filtering that amplifies noise, the system adjusts display timing and pixel values based on motion magnitude and direction, compensating for motion blur while preserving signal-to-noise ratio.
Solution Approach 2:
The patent performs motion compensation preprocessing on video frames before display. By analyzing motion between frames and pre-adjusting pixel values and timing, the system compensates for anticipated motion blur effects during display, avoiding the need for post-processing inverse filtering that would amplify noise.
2Use of energy by moving object
If hold-type display devices are used, then power consumption is reduced, but perceived blur increases due to slow response time
Solution Approach 1:
The patent introduces motion compensation algorithms as an intermediary processing layer between the hold-type display device and the video content. By preprocessing video frames with motion-based filtering and adjusting display timing, the system compensates for the inherent slow response of LCD pixels without requiring hardware modifications or increased power consumption.
Solution Approach 2:
The patent dynamically adjusts display parameters including pixel update timing, hold duration, and frame interpolation based on detected motion characteristics. This allows hold-type displays to maintain low power consumption while improving sharpness perception through intelligent parameter modulation rather than brute-force response time reduction.
3Device complexity
If sample-and-hold driving technique is used, then device complexity is reduced, but after-image formation occurs causing blur
Solution Approach 1:
The patent converts the harmful after-image effect of sample-and-hold driving into a beneficial phenomenon by using motion-based temporal filtering. The system leverages the persistence of LCD pixels to blend multiple frames temporally, using motion compensation to ensure that the after-image effect reinforces rather than degrades image sharpness.
Data Source
AI summary
A system for displaying a digital video sequence includes a graphics processing unit (GPU) and a display device. The GPU receives and modifies the digital video sequence to compensate for perceived blur based on motion between frames of the digital video sequence. The display device displays the modified digital video sequence. A method and computer readable medium having computer readable code is also provided.