Video Signal Assignment for Spatial Consistency
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Solution Overview
Problem
Existing videoconferencing systems face challenges in maintaining spatial consistency and balancing video signals across monitors, leading to an unrealistic experience for participants when the number of cameras at remote sites exceeds the number of displays at the local site.
Innovation Solution
A method and system that determine an optimal monitor for displaying a video signal based on camera location and alignment, calculating the difference in assigned signals across monitors, and assigning the signal to the optimal monitor if the difference is within a threshold, while also considering flexibility ratings to balance signal queues and maintain spatial consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple video signals are displayed on multiple monitors to show all remote participants, then the completeness of information is improved, but the spatial consistency deteriorates when cameras are misaligned
Solution Approach 1:
The system performs preliminary alignment verification of cameras before displaying video signals. The alignment detector checks whether cameras at remote sites are properly aligned with monitors at the local site, and only displays video signals from cameras that pass the alignment check, thereby preventing spatial inconsistency from the outset
Solution Approach 2:
The invention introduces an intermediary system comprising an alignment detector and selective display controller. This intermediary layer sits between the video signal source and the display, filtering and routing signals based on alignment status, thus mediating between the need for complete information display and the requirement for spatial consistency
2Loss of information
If video signals are continuously switched based on voice activity to highlight active speakers, then the relevance of displayed information is improved, but the stability of the display deteriorates due to constant switching
Solution Approach 1:
The system implements dynamic display switching based on voice activity detection. When a participant speaks, the system automatically switches the displayed video signal to show that participant, creating a dynamic response to changing conference conditions while maintaining overall system stability through controlled transition criteria
3Loss of information
If the number of displays is increased to match the number of cameras at remote sites, then the completeness of information is improved, but the device complexity increases
Solution Approach 1:
The system enables monitors to serve multiple functions: they display video signals from aligned cameras during normal operation, and can alternatively display video signals from misaligned cameras when those cameras become the active speaker. This multi-functionality allows the same display infrastructure to handle both spatially consistent and voice-active display requirements without adding hardware
Data Source
AI summary
A method for assigning video signals includes receiving a plurality of video signals from a plurality of cameras located at one or more remote sites, the plurality of video signals for display on a plurality of monitors at a local site. The method includes determining an optimal monitor for displaying a first video signal associated with a first camera based on the location and alignment of the first camera in relation to one or more of the plurality of cameras. The method includes calculating a respective difference between a number of video signals assigned to the optimal monitor and a respective number of video signals assigned to each respective monitor of the plurality of monitors. The method further includes assigning the first video signal to the optimal monitor if the respective difference is not greater than a threshold value with respect to each of the plurality of monitors.