Video Call Server Orientation Correction
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Solution Overview
Problem
Existing video call systems fail to display users in a consistent reference orientation, leading to unnatural image orientations when terminals are rotated, causing discomfort for users during video calls.
Innovation Solution
A system and method where terminals transmit orientation information to a video call control server, which rotates and combines images to maintain a reference orientation, ensuring all users are displayed in a consistent direction, even if terminals are rotated during a video call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the MCU combines images from multiple terminals in their active orientations, then the system supports flexible terminal rotation and capture orientations, but the combined image displays users in inconsistent orientations causing visual discomfort
Solution Approach 1:
The patent introduces an image processing unit as an intermediary between the MCU and the display. This unit receives combined images from the MCU and performs orientation correction by rotating images to a reference orientation before output. The intermediary resolves the contradiction by maintaining the flexibility of terminal rotation while ensuring consistent visual presentation to users.
Solution Approach 2:
Instead of rotating images to match each terminal's active orientation (the conventional approach), the patent inverts the logic by rotating all images to a common reference orientation regardless of terminal orientation. This inversion ensures that all users are displayed consistently in the combined image, eliminating visual discomfort while preserving terminal rotation flexibility.
2Object-affected harmful factors
If the system rotates images to a reference orientation before combining, then all users are displayed in consistent orientation, but additional image processing steps increase system complexity
Solution Approach 1:
The patent divides the image processing function into two separate modules: the MCU handles image combination, while the image processing unit handles orientation correction. This segmentation allows each module to perform its specialized function efficiently without increasing overall system complexity. The orientation correction is isolated to a dedicated unit that processes images after combining but before display.
3Object-affected harmful factors
If the MCU processes and rotates images before transmission, then orientation consistency is maintained, but the MCU processing load and energy consumption increase
Solution Approach 1:
The patent extracts the image rotation and orientation correction functions from the MCU and places them in a separate image processing unit. This extraction reduces the processing load and energy consumption of the MCU, as it only needs to combine images without performing additional rotation operations. The energy-intensive rotation tasks are handled by the dedicated image processing unit.
Data Source
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AI summary
Provided are a system and method for a video call. The system for a video call includes one or more terminals configured to transmit images obtained by capturing video call users, and a video call control server configured to generate a combined image by combining the images transmitted by the one or more terminals, and transmit the combined image to the terminals. Here, the respective images are rotated according to information on orientations sensed by the terminals, and combined into the combined image.