Drive Recorder Event Linking via Timestamp-Based Video Clipping
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Solution Overview
Problem
Existing standalone drive recorders without communication functions struggle to link video data to event information such as impact shocks accurately, necessitating a means to identify and clip video data corresponding to the date and time of the impact shock.
Innovation Solution
A drive recorder operation system comprising a sensor unit to send index information, a drive recorder to capture and store video, and a linking device with a server and terminal device to link events to video files based on index information, enabling the clipping and transfer of relevant video data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a standalone drive recorder without communication function is used, then device complexity is reduced, but the ability to link video data to event information deteriorates
Solution Approach 1:
The system is divided into two independent parts: a simple drive recorder that captures and stores video data, and a separate terminal device that performs the complex task of linking video data to event information. This segmentation allows the drive recorder to remain simple while the linking function is performed by the terminal device that has access to both video data and event information from the sensor unit.
Solution Approach 2:
The terminal device acts as an intermediary between the drive recorder and the sensor unit. It receives video data from the drive recorder and event information from the sensor unit, then performs the linking operation by comparing timestamps and associating relevant video clips with corresponding events. This intermediary approach enables the linking function without modifying the drive recorder itself.
2Reliability
If sensor unit and communication function are added to drive recorder, then ability to link video data to event information is improved, but device complexity increases
Solution Approach 1:
The system separates the drive recorder function from the communication and data linking functions. The drive recorder remains a simple standalone device, while the terminal device handles communication with the sensor unit and performs the data linking operation, thus avoiding complexity in the drive recorder itself.
Solution Approach 2:
The terminal device serves multiple functions: it acts as a communication interface between the sensor unit and drive recorder, stores and manages video data, processes event information, and performs the linking operation. This multi-functionality consolidates complexity into a single device rather than adding it to the drive recorder.
3Device complexity
If manual identification method is used to find video data corresponding to impact shock, then device complexity is reduced, but loss of time increases
Solution Approach 1:
The terminal device automatically performs the identification and clipping of video data corresponding to impact shocks by comparing timestamps from the sensor unit with video metadata. This self-service automation eliminates the need for manual searching through video files, significantly reducing the time required while keeping the drive recorder itself simple and unchanged.
Data Source
AI summary
A drive recorder operation system includes: a sensor unit configured to send index information containing information about an event which occurred in a vehicle; a drive recorder configured to generate a video file by capturing a video of surrounding of the vehicle, and store the video file in a memory medium; and a linking device configured to link the event to the stored video file based on the index information sent from the sensor unit, wherein the linking device includes: a server configured to transfer the index information from the sensor unit; and a terminal device configured to read the video file from the memory medium, clip video data for a predetermined period of time including a date and time of the event based on the index information transferred from the server, and send the clipped video data to the server.