Video Conversion System Static Metadata Update

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Solution Overview

Problem

HDR TVs with HDMI input sources experience temporary issues with wrong luminance and color when switching to new video settings due to metadata mismatches, leading to a user experience impacted by the display of black masks during updates.

Innovation Solution

A method and system that includes a static metadata detector generating a change flag, a frame buffer repeating the output video, and a video setting configuration unit updating settings accordingly, ensuring seamless switching by delaying the display until new settings are applied.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the HDR TV displays a black mask during video setting update, then the luminance and color accuracy is maintained, but the user experience is degraded

Engineering Contradiction:

Improveluminance and color accuracyVSAvoiduser experience

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The system performs preliminary actions by detecting static metadata changes and updating video settings before the actual video content needs to be displayed with new settings. The black mask is displayed temporarily during this preliminary update phase, ensuring that when the mask is removed, the video settings are already correctly updated and ready for seamless display resumption.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the HDR TV updates video setting immediately when static metadata changes, then the user experience is improved, but the luminance and color accuracy deteriorates during the transition

Engineering Contradiction:

Improveuser experienceVSAvoidluminance and color accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The black mask serves as an intermediary element during the video setting transition. It temporarily takes over the display output while the video settings are being updated in the background, preventing the mismatch between old settings and new video content from reaching the user. Once the settings update is complete, the mask is removed and the correctly configured video display resumes seamlessly.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If the video setting update is delayed to maintain accuracy, then the luminance and color accuracy is preserved, but the switching speed deteriorates

Engineering Contradiction:

Improveluminance and color accuracyVSAvoidswitching speed

Core Design Contradiction:

Manufacturing precisionVSSpeed

Solution Approach 1:

The system maintains continuity of useful action by keeping the video display continuous through the black mask, while the video setting updates occur in the background without interrupting the overall display flow. The mask ensures that the display output remains stable and continuous, preventing any visible glitches or mismatches during the setting transition, thus maintaining both accuracy and perceived speed.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS9986200B1Method and video conversion system of updating video setting

Publication Date: 2018.05.29 NOVATEK MICROELECTRONICS CORP

AI summary

A switching method of video setting for a video conversion system includes generating a static metadata change flag when a static metadata change event is detected, repeating an output video after the static metadata change flag is generated, updating a video setting according to a static metadata corresponding to an input video when the output video is repeated, and converting the input video into the output video according to the video setting to display the output video.