Dynamic Image Data Transmission for Multi-Camera Vehicle Systems
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Solution Overview
Problem
Modern vehicles with multiple cameras face challenges in efficiently transmitting large amounts of image data due to varying requirements and limited bandwidth, which can lead to network and computing unit overload.
Innovation Solution
A method and apparatus that dynamically adjust image settings for each camera based on predefined desired data rates, considering the requirements of active functions, available data rates, and computing capacity, while prioritizing safety-critical functions and adapting to changing vehicle states and current data rates to ensure efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image data from multiple cameras are transmitted at high quality and high data rates, then the image quality and functional requirements are met, but the network bandwidth is exceeded and computing units are overloaded
Solution Approach 1:
The patent dynamically changes image parameters (resolution, frame rate, compression rate) based on the importance of the function and current system load. For example, less important functions receive lower resolution images while safety-critical functions receive high-quality images, thereby adapting the data rate to match actual needs without compromising essential image quality
Solution Approach 2:
The patent applies different image quality levels to different cameras and functions based on their importance. Safety-critical functions (e.g., collision avoidance) receive high-quality images, while less critical functions (e.g., parking assist) receive lower-quality images. This local differentiation of quality ensures that bandwidth is allocated efficiently according to functional priority
2Productivity
If the data rate is reduced to prevent network overload, then network bandwidth usage is optimized, but the image quality may become insufficient for meeting functional requirements
Solution Approach 1:
The system dynamically adjusts image parameters in real-time based on changing conditions such as vehicle speed, detected objects, and current network load. When safety-critical situations are detected, the system automatically increases image quality for relevant cameras regardless of bandwidth constraints, ensuring that image quality is sufficient when needed most
Solution Approach 2:
The system implements feedback mechanisms where the central control unit continuously monitors network load, computing unit performance, and function requirements. Based on this feedback, it dynamically recalibrates image parameters to maintain the minimum necessary quality for each function while optimizing overall bandwidth usage
3Reliability
If all cameras transmit at maximum quality continuously, then all functions can operate at full capability, but energy consumption increases and unnecessary data is transmitted
Solution Approach 1:
The patent applies partial action by transmitting only the necessary amount of image data for each function's requirements. Instead of all cameras operating at maximum quality continuously, the system transmits full-quality images only for cameras and functions that currently require them, while reducing or suspending transmission for less critical functions, thereby reducing energy consumption without compromising essential reliability
Solution Approach 2:
The system changes image transmission parameters (resolution, frame rate, compression) based on current functional requirements and system state. When functions are activated or deactivated, or when system load changes, the parameters are adjusted accordingly, ensuring that energy is consumed only when and where necessary to maintain function capability
Data Source
AI summary
In a method for transmitting image data from a plurality of cameras in a vehicle, a set of functions is provided, which set of functions comprises a plurality of functions each having a requirement for a respective image setting of at least one of the cameras. If a function is activated, a respective image setting is set for at least one of the cameras on the basis of at least one of the function and a respective predefined desired data rate during image data transmission in order to provide the image data from the respective camera for the respective function.