In-Vehicle Video Frame-Rate Fallback for Microcomputer Failure
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Solution Overview
Problem
Conventional in-vehicle camera systems face issues with displaying appropriate video when an abnormality occurs in the main microcomputer, as they risk outputting videos with frame rates different from the display requirements, leading to improper display.
Innovation Solution
A video processing apparatus with a controller that can detect abnormalities in the main microcomputer and convert the frame rate of the video signal from a camera into a compatible display frame rate, bypassing the main microcomputer to ensure proper display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main microcomputer converts the frame rate of the video signal, then the video is processed with appropriate frame rate for display, but when abnormality occurs in the main microcomputer, the video may not be displayed properly due to frame rate mismatch
Solution Approach 1:
The controller acts as an intermediary between the camera and the display. When the main microcomputer is abnormal, the controller directly converts the frame rate of the video signal from the camera to match the display requirements, bypassing the defective main microcomputer's frame rate conversion function and ensuring proper video display
Solution Approach 2:
The controller changes the frame rate parameter of the video signal when detecting main microcomputer abnormality. By adjusting the frame rate to match the display requirements, the controller ensures continuous proper video display even when the main microcomputer cannot perform frame rate conversion
2Reliability
If the controller directly converts frame rate when main microcomputer is abnormal, then proper video display is maintained, but the system requires additional control logic and monitoring capabilities
Solution Approach 1:
The controller continuously monitors the operation status of the main microcomputer and receives video signals from the camera. Based on feedback about main microcomputer abnormality, the controller automatically switches to direct frame rate conversion mode, ensuring continuous proper video display without requiring complex manual intervention
Data Source
AI summary
A video processing apparatus includes: a microcomputer that performs following two processes on a first video signal from a camera, and outputs processed first video signal as a second video signal; i) superimposing an image that assists driving of a vehicle on the first video signal, and ii) converting a frame rate of the first video signal into a frame rate for a display; and a controller that receives the first video signal and receives the second video signal, in a first case where the second video signal is input to the controller, the controller outputting the second video signal to the display, and in a second case where the second video signal is not input to the controller or not updated, the controller converting a frame rate of the first video signal into the frame rate for the display to output the converted first video signal to the display.