Vehicle-mounted Video Processing Circuit Bypass for Real-time Display
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Solution Overview
Problem
Existing vehicle-mounted infotainment devices face challenges in maintaining real-time video processing while performing advanced graphic operations, often resulting in delayed video display and increased system costs due to heavy processing loads and limitations in graphic processing capabilities.
Innovation Solution
A vehicle-mounted device with a video processing circuit that outputs video signals from an imaging device to a display unit, while a main processing circuit generates images from vehicle information and superimposes them on the video signal, allowing for advanced graphic processing without relying on a slow-starting main chip, thus ensuring real-time video display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the main chip processes the video from the camera in units of frames, then advanced video processing can be performed, but the realtimeness of the video displayed is poor
Solution Approach 1:
The system divides video processing into two separate paths: a main processing path for advanced frame-by-frame processing and a bypass path for real-time display. The video signal is segmented and routed through different processing circuits depending on the required processing level and timing requirements.
Solution Approach 2:
A video processing IC is introduced as an intermediary component on the bypass route to handle basic video processing tasks that would otherwise require the main chip, enabling real-time processing without sacrificing advanced processing capabilities when needed.
2Loss of time
If a bypass route is provided to output video signal directly to display, then realtimeness is improved, but advanced video processing cannot be performed
Solution Approach 1:
The system dynamically switches between bypass mode for real-time display and main chip processing mode for advanced processing based on the specific processing requirements and timing constraints of each video frame or processing task.
3Adaptability or versatility
If a high-spec video processing IC is used on the bypass route, then advanced graphic processing can be performed, but system cost increases
Solution Approach 1:
The video processing IC on the bypass route is designed with specific local capabilities tailored to real-time processing requirements, rather than providing full advanced processing capabilities. This allows cost-effective implementation by providing only the necessary processing functions in the bypass path.
4Ease of manufacture
If a low-spec video processing IC is used on the bypass route, then system cost is reduced, but graphic processing capability is limited
Solution Approach 1:
The system merges the capabilities of the simple video processing IC on the bypass route with the advanced processing capabilities of the main chip, creating a combined processing architecture that achieves both cost-effectiveness and advanced graphic processing capability through coordinated operation of both processing paths.
Data Source
AI summary
A video processing circuit outputs a video signal from an imaging device for imaging a scene outside a vehicle. A processing circuit generates an image from vehicle information and outputs the image to the video processing circuit. The video processing circuit superimposes the image from the main processing circuit on the video signal from the imaging device and outputs a resultant video. The processing circuit is capable of outputting a video signal from a source other than the imaging device to the video processing circuit. The processing circuit outputs an instruction signal for setting an image blending function to be on or off to the video processing circuit. In a case of outputting the video signal from the source other than the imaging device to the video processing circuit, the processing circuit outputs the instruction signal for setting the image blending function to be off.