Vehicle Camera Controller Differential Signaling Margin
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Solution Overview
Problem
Vehicle-mounted camera systems using differential signaling, such as LVDS, are prone to errors due to electrical disturbances, particularly when used in ADAS operations, necessitating improved robustness in differential signaling.
Innovation Solution
A control apparatus for vehicle-mounted camera systems that includes a margin-of-communication obtainer to assess the robustness of differential signaling and a restriction determiner to adjust communication characteristics, frame rate, and image-capturing area when the margin falls below a threshold, ensuring priority data delivery to critical applications like collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If differential signaling is used for communication between camera and controller, then communication speed and data transmission capability are improved, but robustness against electrical disturbances deteriorates
Solution Approach 1:
The system dynamically adjusts communication parameters (frame rate, resolution, bit depth) based on the measured margin of communication. When electrical disturbances are detected causing margin degradation, the system adaptively reduces communication load to maintain reliable transmission, resolving the contradiction between high-speed communication and robustness.
Solution Approach 2:
The controller measures the margin of communication between camera and controller, and uses this feedback information to adjust communication characteristics. This closed-loop feedback mechanism allows the system to respond to electrical disturbances and maintain reliable communication by adapting to changing signal quality conditions.
2Reliability
If communication parameters are restricted to improve robustness, then reliability of differential signaling is improved, but productivity of image data transmission deteriorates
Solution Approach 1:
The system dynamically adjusts communication parameters (frame rate, resolution, bit depth) based on the measured margin of communication. When electrical disturbances are detected causing margin degradation, the system adaptively reduces communication load to maintain reliable transmission, resolving the contradiction between high-speed communication and robustness.
Solution Approach 2:
The system changes communication parameters (frame rate, resolution, bit depth) based on the measured margin of communication to optimize the balance between reliability and productivity. By adjusting these parameters dynamically, the system maintains the highest possible data transmission rate while ensuring robust communication under varying electrical conditions.
Data Source
AI summary
A control apparatus for a vehicle-mounted camera system equipped with a vehicle-mounted camera which captures an image of surroundings of a vehicle includes a margin-of-communication obtainer and a restriction determiner. The margin-of-communication obtainer works to determine a value of the margin of differential signaling between the vehicle-mounted camera and the control apparatus. When the value of the margin of differential signaling is lower than a restriction threshold value, the restriction determiner restricts at least one of a communication characteristic of the differential signaling, an application using the captured image, a frame rate in the vehicle-mounted camera, and an image-capturing area. This achieves the control apparatus for the vehicle-mounted camera system which is high in robustness in the differential signaling.