Distance Marker Positioning for Wireless Video Delay Compensation
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Solution Overview
Problem
Delays in wireless communication between onboard and terminal devices can lead to delayed presentation of video footage around a vehicle, making it difficult to provide real-time image information to drivers.
Innovation Solution
The system superimposes distance markers on the image at a position shifted towards the vehicle's traveling direction or vehicle side when wireless communication is delayed, allowing drivers to recognize the real-time state around the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If video footage is transmitted via wireless communication from onboard device to terminal device, then the driver can access image information around the vehicle, but communication delay causes timing delay in presenting the captured image
Solution Approach 1:
The system performs preliminary actions by predicting the vehicle's future position based on current travel information (speed, direction) and superimposing distance markers at positions corresponding to the predicted location rather than the current captured image position. This anticipatory adjustment compensates for the inherent delay in wireless transmission, ensuring that when the image is finally presented, the distance markers accurately reflect the real-time spatial relationships.
Solution Approach 2:
The system changes the positional parameter of distance markers dynamically based on communication delay detection. When delay is detected, the system adjusts the marker positions by shifting them in the direction opposite to vehicle travel by an amount corresponding to the delay period's vehicle displacement. This parameter adjustment transforms the static distance markers into dynamic compensatory elements that maintain accuracy despite transmission latency.
2Measurement precision
If distance markers are superimposed at reference positions based on captured image data, then the markers accurately represent distances at the time of capture, but when communication is delayed, the markers no longer reflect the real-time state around the vehicle
Solution Approach 1:
The system implements a feedback mechanism where the terminal device detects communication delay timing and feeds this information back to adjust the distance marker positioning. The delay detection result is used to calculate the vehicle's displacement during the delay period, which then informs the positional adjustment of distance markers. This closed-loop feedback ensures that distance markers continuously adapt to maintain real-time accuracy despite transmission delays.
Solution Approach 2:
The system transitions from static distance marker positioning to dynamic positioning that adapts to changing conditions. The distance markers are no longer fixed at reference positions based solely on capture time, but are dynamically adjusted based on real-time factors including vehicle travel information (speed, direction) and detected communication delay. This dynamic approach allows the markers to track the vehicle's changing position and maintain reliability in real-time representation.
Data Source
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AI summary
An information presentation system comprises an onboard device including a camera provided on a vehicle and a terminal device having portability and performing wireless communication with the onboard device. The terminal device comprises an image acquisition device configured to acquire an image around the vehicle captured by the camera, a superimposition device configured to superimpose a distance marker on the image. The distance marker represents a distance from the vehicle. The terminal device further comprises a determination device configured to determine a delay state of the wireless communication between the onboard device and the terminal device and a presentation device configured to present the image on which the distance marker is superimposed. When the wireless communication is not delayed, the superimposition device superimposes the distance marker on the image at a reference position at which the distance from the vehicle is a distance represented by the distance marker. When the wireless communication is delayed, the superimposition device superimposes the distance marker on the image at a position at a traveling direction side of the vehicle than the reference position or a position at the vehicle side than the reference position.