Cockpit Display System Video Mixing Center Coordinate Translation
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Solution Overview
Problem
Current aircraft cockpit display systems face challenges in managing video streams within windows, requiring precise knowledge of window positioning logic, leading to inconsistent displays and limitations in moving windows with video streams using 'drag and drop' functions.
Innovation Solution
The CMV is controlled by the CDS, with the system architecture revised to break the functional link between the video selection interface and the CMV, allowing the CDS to send requests in relative coordinates, and the CMV to format and position video streams in absolute coordinates, ensuring consistent display and independence from window positioning logic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the video selection interface directly controls the CMV with absolute coordinates, then the video positioning is precise, but the system architecture becomes complex and the display consistency deteriorates due to unsynchronized coordinate systems
Solution Approach 1:
The CDS acts as an intermediary between the video selection interface and the CMV. It receives relative coordinate requests from the interface, converts them to absolute coordinates internally, and sends the converted coordinates to the CMV. This mediator role simplifies the interface requirements while maintaining precise video positioning and display consistency.
Solution Approach 2:
The patent replaces the direct mechanical control link (interface → CMV with absolute coordinates) with a software-based coordinate conversion system (interface → CDS → CMV). This substitution eliminates the need for the interface to know absolute positioning logic, reducing system complexity while preserving positioning precision through automated coordinate transformation.
2Ease of operation
If the CDS manages window positioning with relative coordinates, then the ease of operation improves, but the video display consistency deteriorates due to lack of synchronization with the CMV
Solution Approach 1:
The CDS receives the video stream from the CMV with a specific timestamp and uses this feedback to synchronize the display of the video with the corresponding GUI elements. The system compares the video timestamp with the current display frame timing to ensure that the video and interface are displayed consistently, preventing desynchronization.
Solution Approach 2:
The CDS performs preliminary coordinate conversion from relative to absolute coordinates before the video is sent to the CMV. This advance preparation ensures that when the video arrives, the positioning information is already synchronized with the window manager's coordinate system, maintaining display consistency without requiring real-time coordination.
3Measurement precision
If the interface sends video requests in absolute coordinates, then the CMV can position video accurately, but the adaptability deteriorates because the interface must know CDS window positioning logic
Solution Approach 1:
The patent segments the coordinate system management into two independent parts: the CDS window manager handles relative coordinates for window positioning, while the CMV handles absolute coordinates for video positioning. This segmentation allows the interface to work with simple relative coordinates without needing to know the complex absolute positioning logic, improving adaptability while maintaining precision through the CDS's coordinate conversion capability.
Data Source
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AI summary
The method involves determining graphical positioning of a window, a man-machine interface and display parameters of a video image on a display screen at absolute coordinates with respect to a display screen by a cockpit display system (CDS). Display demand of the image is sent by the system to a video mixing center (CMV) at the coordinates. The image is selected, shaped and positioned by the center at the coordinates with respect to the demand issued from the system. The shaped image is received and transmitted by the system to the screen in the window at a desired location.