On-Vehicle Event Data Cross-Referencing with Continuous DVR Memory
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for capturing driving and vehicle event data are limited by their predefined time windows, failing to account for important information outside these windows and are inefficient due to limited buffer memory and processing overhead.
Innovation Solution
An on-vehicle event detection and reporting system that includes a camera, event buffer, continuous DVR memory, clock circuit, and wireless transceiver, allowing for cross-referencing and transmission of event data with continuous video data, enabling the retrieval of additional data based on user requests using an event identifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a predefined time window is used to capture event data, then the data capture process is simple and efficient, but important information outside the window is missed
Solution Approach 1:
The system divides the data storage into two separate memory systems: a circular buffer for predefined window event data and a continuous DVR memory for extended continuous video data. This segmentation allows the system to capture both immediate event context and broader temporal information without requiring a single large complex storage system
Solution Approach 2:
The system adds a temporal dimension to data retrieval by maintaining continuous video recording alongside event-based capturing. This allows users to access not only the predefined window around an event but also extend into prequel and sequel time periods by retrieving continuous video segments corresponding to the event timestamp
2Loss of information
If the data capture window is enlarged to include more time periods, then more complete event data is captured, but processing overhead and memory requirements increase
Solution Approach 1:
The system uses partial action by only processing and transmitting the necessary portions of data. The circular buffer captures essential event data within a predefined window, while the continuous DVR memory provides additional context only when needed. This avoids the excessive action of continuously processing and transmitting all possible data from an extended time window
Solution Approach 2:
The system extracts only the relevant data segments from the continuous video stream corresponding to the event timestamp and requested time periods. Instead of processing the entire continuous video data, the system selectively extracts and transmits only the portions needed for complete event reconstruction
3Productivity
If a predefined small time window is used for event data capture, then processing overhead is reduced, but important contextual information is lost
Solution Approach 1:
The system merges data from two separate memory systems: the circular buffer containing structured event data and the continuous DVR memory containing unstructured video data. By combining these complementary data sources and cross-referencing them using the event identifier and timestamp, the system achieves both processing efficiency and information completeness
Data Source
AI summary
A method for providing event data from cross-referenced data memories of an on-vehicle event detection and reporting system includes cross-referencing event data stored in an event buffer with continuous video data stored in a continuous DVR memory. A request for additional data corresponding to a detected driving or vehicle event may be received by the on-vehicle system, where the request includes an event identifier corresponding to a detected driving or vehicle event. The requested additional data is identified in the DVR memory using the event identifier and based on said cross-referencing between the event data with the continuous video data stored in the DVR memory. The identified additional data is then transmitted from the DVR memory for display on a user computer.