Color Transient Improvement Unit for Video Blurring Reduction

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Solution Overview

Problem

De-interlaced video streams typically have lower image quality compared to true progressive video streams, necessitating a method to enhance the image quality of de-interlaced video frames.

Innovation Solution

The proposed solution involves an image enhancement unit that combines contour enhancement, luminance contrast stretching, color transient improvement, and color saturation control units to enhance both luminance and chrominance values of video frames independently, with these processes performed in parallel to reduce processing time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If deinterlacing techniques are used to convert interlaced video streams into progressive video streams, then compatibility with progressive scan devices is achieved, but image quality deteriorates

Engineering Contradiction:

Improvecompatibility with progressive scan devicesVSAvoidimage quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent introduces an image enhancement unit as an intermediary component between the deinterlacing process and the progressive scan display. This enhancement unit processes the deinterlaced video frames to improve image quality by enhancing chrominance and luminance, effectively mediating between the compatibility requirement and the quality degradation issue

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies parameter changes by independently adjusting chrominance and luminance parameters of the video frames. The enhancement unit modifies these parameters to compensate for quality loss during deinterlacing, allowing the system to maintain both compatibility and improved image quality

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If multiple enhancement processes are applied to video frames, then image quality improves, but processing time increases

Engineering Contradiction:

Improveimage qualityVSAvoidprocessing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent segments the image enhancement process into two independent parallel processes: chrominance enhancement and luminance enhancement. By dividing the enhancement task into separate processing streams that operate simultaneously, the system achieves comprehensive image quality improvement without proportionally increasing total processing time

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from sequential processing to parallel processing by utilizing another dimension of time execution. The chrominance and luminance enhancements are performed concurrently rather than one after another, effectively reducing the time penalty associated with multiple enhancement processes

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS7532255B2Color transient improvement unit and method to reduce blurring at color transients in video images

Publication Date: 2009.05.12 ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL

AI summary

A color transient improvement unit and method for improving color transients to remove blurring along the edges of color transitions is presented. A transient characterization unit calculates various transient characterization values for a color transient detection window surrounding a current pixel. A transient threshold unit analyzes the transient characterization values to determine whether the color transient detection window contains a color transition. If a color transition exists, a transient correction unit generates an improved U chrominance value and an improved V chrominance value for the current pixel.