Video Processor Regional Brightness Adjustment

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Solution Overview

Problem

Current video processors suffer from poor signal quality and distortion in analog television signals, leading to inadequate contrast and sharpness in displayed frames, with limited ability to perform regional adjustments.

Innovation Solution

A video processor that uses a low-pass filter to find brightness distribution data for each region and calculates differences with frame data, multiplying by a weighting parameter to generate processed frame data, allowing for enhanced contrast and sharpness with reduced distortion and regional adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If conventional brightness adjustment curve is applied to enhance contrast, then the contrast display effect is improved, but the displayed frame is seriously distorted

Engineering Contradiction:

Improvebrightness contrastVSAvoidframe distortion

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent divides the displayed frame into multiple regions and applies different brightness adjustment curves to each region. Instead of using a single global adjustment curve that causes serious distortion, the system calculates regional brightness distribution data and applies localized adjustments, thereby maintaining frame integrity while enhancing contrast display effect.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If single full-region adjustment is applied, then processing simplicity is maintained, but regional adjustment capability is lost

Engineering Contradiction:

Improveadjustment simplicityVSAvoidregional adjustment capability

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent segments the displayed frame into multiple regions and performs brightness adjustment operations on each region independently. By dividing the frame into regional sections and applying specific adjustment curves to each, the system achieves both regional adaptability and processing efficiency, avoiding the complexity of handling each pixel individually while enabling targeted contrast enhancement.

Inventive Principle:

Principle #1Segmentation

3Reliability

If analog television signal is transmitted via cable, then signal transmission is achieved, but signal quality is poor

Engineering Contradiction:

Improvesignal transmissionVSAvoidsignal quality

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent introduces a video processor as an intermediary device between the analog television signal source and the display. This processor enhances the signal quality by performing brightness distribution analysis and regional contrast enhancement operations, thereby improving the overall signal quality without changing the transmission medium.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8199257B2Video filter and video processor and processing method using the same

Publication Date: 2012.06.12 NOVATEK MICROELECTRONICS CORP

AI summary

A video processor includes a video filter and a calculation circuit. The video filter performs a low-pass filtering operation on first frame data to obtain brightness distribution data. The calculation circuit obtains difference data between the brightness distribution data and second frame data. The calculation circuit multiplies the difference data and a weighting parameter together to obtain a product, and then summates the product and the second frame data together to generate processed frame data.