Video Processing Device Mute Video Luminance Control

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Solution Overview

Problem

The significant variation in viewer brightness perception during content switching, particularly with HDR content, can lead to discomfort due to large luminance differences, especially when switching from high-luminance content to a black screen.

Innovation Solution

A video processing device that calculates video features such as sense luminance values and generates a mute video with a luminance value corresponding to the previous content, ensuring the luminance difference between the mute video and the previous content is within a predetermined range, thereby reducing psychological burden.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a black screen is displayed during content switching in HDR, then the transition is clear and distinct, but the luminance difference causes viewer discomfort and psychological burden

Engineering Contradiction:

Improvecontent switching clarityVSAvoidviewer discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the luminance parameter of the mute video from a fixed black screen (0 luminance) to a dynamic value that matches the luminance of the previous content. This parameter adjustment resolves the contradiction by maintaining clear content switching while eliminating the harmful luminance difference that causes viewer discomfort.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies preliminary action by pre-setting the luminance of the mute video to match the previous content's luminance before the transition occurs. This preparatory adjustment ensures that when content switching happens, there is no abrupt luminance change, thus preventing viewer discomfort while maintaining transition clarity.

Inventive Principle:

Principle #10Preliminary action

2Illumination intensity

If HDR content is used, then high luminance and wide variation width are achieved, but the luminance difference during switching becomes excessively large

Engineering Contradiction:

Improveluminance rangeVSAvoidluminance difference

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent dynamically adjusts the luminance parameter of the mute video based on the previous content's luminance characteristics. This resolves the contradiction by allowing HDR's wide luminance range to be utilized while preventing excessively large luminance differences during transitions through adaptive parameter matching.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback by using the luminance information from the previous content to determine the luminance of the mute video. This feedback mechanism ensures that the luminance difference during switching is controlled, preventing viewer discomfort while preserving HDR's luminance capabilities.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10419709B2Video processing device, transmitting device, control program, and recording medium

Publication Date: 2019.09.17 SHARP KK

AI summary

A technology of preventing feeling of a viewer on brightness from significantly changing when content is switched is provided. A transmitting device (1) includes a calculation unit (12) that calculates a video feature of a transmission video signal, and a mute video generation unit (13) that generates a mute video posterior to a first video signal, in which luminance of the mute video is luminance corresponding to a value of a video feature relating to the first video signal.