Display Resolution Feedback for Aspect-Ratio Video Transmission
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Solution Overview
Problem
Existing display systems face inefficiencies due to the transmission of unnecessary information when the aspect ratios of images differ between a display apparatus and a video output apparatus, leading to inefficient video transmission.
Innovation Solution
A display system where the image output apparatus adjusts its output resolution based on received resolution information from the display apparatus, ensuring the aspect ratio matches, thereby reducing unnecessary information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display apparatus outputs images with a resolution that differs from the aspect ratio of the video output apparatus, then the image can be displayed with proper aspect ratio, but unnecessary information is transmitted leading to inefficient video transmission
Solution Approach 1:
The video output apparatus performs preliminary action by outputting resolution information to the display apparatus before actually transmitting the video signal. This allows the display apparatus to know the exact resolution and aspect ratio of the incoming video, enabling it to pre-calculate the appropriate scaling and positioning parameters, thereby avoiding transmission of unnecessary margin information and improving transmission efficiency
Solution Approach 2:
The system implements feedback by having the display apparatus send resolution information back to the video output apparatus. This feedback loop allows the video output apparatus to adjust its output parameters based on the display apparatus's capabilities, ensuring that only necessary information is transmitted and eliminating redundant data that would cause inefficient video transmission
2Manufacturing precision
If the display apparatus uses letterbox, pillar-box, or side-panel format to display images with different aspect ratios, then the correct aspect ratio is maintained, but the margin contains unnecessary information resulting in inefficient transmission
Solution Approach 1:
The system extracts and removes the unnecessary margin information from the video signal by having the display apparatus calculate the exact resolution and aspect ratio parameters. Instead of transmitting the complete image including margins, the system extracts only the essential video information and transmits it with the appropriate resolution parameters, thereby maintaining aspect ratio precision while improving transmission energy efficiency
Data Source
AI summary
A display system including an image output apparatus that outputs an image having a first aspect ratio, and a display apparatus that displays the image output by the image output apparatus, the display apparatus transmitting resolution information to the image output apparatus, the resolution information containing information indicating a first resolution that is the resolution in a first direction and a second resolution that is the resolution in a second direction perpendicular to the first direction, the image output apparatus performing receiving the resolution information from the display apparatus, and outputting a first image to the display apparatus based on the resolution information, the first image having a third resolution lower than the first resolution, and the second resolution and having an aspect ratio equal to the first aspect ratio, and the display apparatus displaying a second image containing the first image and having the first and second resolutions.