Dynamic Recording Window for Dashcam Event Capture
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Solution Overview
Problem
Existing dashboard cameras may miss recording the event that triggers a traffic accident if the recording start time is set based on the accident occurrence time, as the event's onset can precede the predetermined recording start time due to the vehicle's travel distance.
Innovation Solution
A recording control apparatus that generates event recording files by starting from a passing time point of a changing point, such as an intersection, and includes a predetermined period before and after the event detection time, ensuring relevant events are captured without relying solely on a fixed recording start time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If recording starts from a fixed time point before accident occurrence, then recording efficiency is improved, but the event triggering the accident may be missed
Solution Approach 1:
The recording start time is made dynamic rather than fixed. The system automatically adjusts the recording start time based on the vehicle's position relative to changing points (intersections). When the vehicle approaches a changing point, the system extends the recording start time backward to capture the event triggering the accident, ensuring both efficiency and accuracy.
Solution Approach 2:
The recording parameters (start time, end time, duration) are changed dynamically based on the vehicle's position and the detected changing points. The system modifies the recording time window according to the actual driving context, transitioning from a static fixed-time recording mode to an adaptive parameter adjustment mode that captures events accurately.
2Reliability
If recording duration is extended to capture events before accident, then event capture accuracy is improved, but recording file size increases
Solution Approach 1:
The system applies different recording strategies to different time periods. Instead of uniformly extending recording duration, it focuses the extended recording only on the critical period before changing points where events are likely to occur. The recording duration is locally extended only when necessary, maintaining small file sizes during normal driving while ensuring comprehensive coverage during critical events.
Solution Approach 2:
The system performs preliminary identification of changing points and potential event triggers before the actual accident occurs. By detecting changes in driving conditions and approaching intersections in advance, the system prepares to extend recording only when needed, avoiding unnecessary extended recording and file size increase during normal driving conditions.
3Device complexity
If recording is based on fixed time intervals, then device complexity is reduced, but event relevance is compromised
Solution Approach 1:
The system introduces changing point information as an intermediary factor between the fixed time interval recording and the event-driven recording requirement. The changing point detection mechanism acts as a mediator that triggers dynamic recording adjustments only when necessary, maintaining overall system simplicity while improving event relevance through targeted adaptations.
Data Source
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AI summary
A recording control apparatus, a recording apparatus, a recording control method, and a recording control program capable of appropriately recording an event that has triggered a traffic accident or the like are provided. A recording control apparatus (110) according to the present invention includes a video data acquisition unit (111) configured to acquire video data obtained by shooting an area around a vehicle, an event detection unit (114) configured to detect an occurrence of a predetermined event in the vehicle, a changing-point determination unit (115) configured to determine whether or not the vehicle has passed a changing point on a traveling road based on a current position information of the vehicle, and a recording control unit (116) configured to, when the event detection unit (114) detects the occurrence of the event, record the video data including a first period as an event recording file in a recording unit (140), the first period being from a passing time point of the changing point to a detecting time point of the event, the changing point being a point that the vehicle has passed at least a first time earlier than the detecting time point of the event.