Dynamic Video Layout for Aspect Ratio Adaptation
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Solution Overview
Problem
Existing video conferencing systems face challenges in presenting a high-quality composite video signal due to fixed layouts that do not adapt to varying picture aspect ratios and resolutions of incoming video signals, leading to reduced image quality.
Innovation Solution
A method and apparatus for dynamically determining and adjusting the composite image layout based on properties such as picture aspect ratio and resolution of received video signals, allowing for optimal display of all video signals without reducing quality, by selecting appropriate sub-picture areas for each signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed composite image layout is used for the duration of the conference, then the device complexity is reduced and ease of operation is improved, but the adaptability to different picture aspect ratios and resolutions deteriorates, leading to reduced image quality
Solution Approach 1:
The patent implements dynamic layout adjustment by continuously monitoring video signal properties (aspect ratio, resolution) from multiple conference sites and automatically reconfiguring the composite image layout in real-time. The layout controller detects changes in signal characteristics and dynamically selects appropriate layout configurations, transforming the static fixed layout system into a dynamic adaptive system that optimizes image quality without increasing operational complexity for users.
2Device complexity
If video signals with different aspect ratios (e.g., 16:9) are displayed in a fixed 4:3 sub-picture layout, then the device complexity is reduced, but the manufacturing precision and image quality deteriorate due to cropping or letterboxing
Solution Approach 1:
The patent changes the layout parameters (sub-picture aspect ratios, region allocations) based on the detected video signal parameters. When 16:9 signals are detected, the system reconfigures the composite layout to include 16:9 sub-pictures instead of forcing 4:3 sub-pictures, thereby maintaining the original signal aspect ratio and eliminating the need for cropping or letterboxing operations that degrade image quality.
Solution Approach 2:
The patent applies different layout configurations to different regions of the composite image based on the specific characteristics of video signals from different conference sites. Each sub-picture area is optimized to match the aspect ratio and resolution of its corresponding video source, allowing high-quality display of diverse signal formats within the same composite image without requiring complex signal processing.
3Adaptability or versatility
If the composite image layout is dynamically adjusted based on received video signal properties, then the adaptability and image quality are improved, but the device complexity and processing requirements increase
Solution Approach 1:
The patent implements a feedback mechanism where the layout controller continuously monitors video signal properties from conference sites and uses this information to automatically adjust the composite image layout. The system detects changes in signal characteristics and feeds this information back to the layout configuration, creating a closed-loop control system that adapts to varying signal conditions without requiring manual intervention or significantly increasing overall system complexity.
Data Source
AI summary
A method and apparatus for conferencing dynamically determines composite image layout based on properties of received conferencing signals that include video signals and control signals. Video signals received from connected sites are processed to provide a composite video signal according to the defined composite image layout and the composite video signal is transmitted to the connected sites. Upon a change in properties of one or more received video signals, the composite image layout may be redefined. The received video signals are processed according to the redefined composite image layout to provide a second composite video signal that is transmitted to the connected sites.