Drive Recorder Recording Control for SD Card Rewrite Limits
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Solution Overview
Problem
Existing drive recorders fail to effectively manage the lifespan of SD cards, leading to potential loss of critical event recordings due to excessive rewriting, either by alarming users too late or prohibiting recording when the memory reaches its end, thereby compromising the functionality of the drive recorder.
Innovation Solution
A video image recording control apparatus that includes a recording processing unit and a recording controller to differentiate between loop recording and event recording modes, restricting the loop recording mode when the SD card's rewriting threshold is exceeded, ensuring that event recordings can continue uninterrupted until the card is replaced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the SD card continues to be used after the number of rewrites exceeds the rewrite restricted number, then the device remains operational, but important event recordings may be lost due to card failure
Solution Approach 1:
The system dynamically changes the recording mode based on the SD card's rewrite count. When the rewrite count is below the threshold, both loop recording and event recording are enabled. When the rewrite count exceeds the threshold, the system automatically switches to event recording only mode, preventing further loop recordings that would consume the remaining card life while preserving the ability to record critical events.
2Reliability
If writing is prohibited when the memory has reached the end of its life, then the SD card is protected from further damage, but event recording cannot be performed and the drive recorder function is compromised
Solution Approach 1:
The system segments the recording functionality into two independent modes: loop recording and event recording. By separating these functions, the system can selectively disable loop recording while keeping event recording operational when the SD card approaches its rewrite limit. This segmentation allows the drive recorder to maintain its core safety function (event recording) even when the storage medium is near failure.
3Ease of operation
If an alarm is given when the rewrite number is reached, then the user is notified, but the SD card continues to be used and may fail without recording important scenes
Solution Approach 1:
The system performs preliminary action by proactively switching to event recording only mode before the SD card actually fails. Instead of waiting for the rewrite limit to be reached and then alarming the user, the system preemptively protects against future failures by disabling loop recording when the rewrite count exceeds the threshold, ensuring continuous event recording capability throughout the card's remaining life.
Data Source
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AI summary
The present disclosure aims to appropriately control a recording mode when the end of a rewrite life of a recording apparatus has approached. A video image recording control apparatus (1) according to the present disclosure includes: a recording processing unit (12) configured to record video image data in a recording apparatus (3) by a first recording mode in which video image data captured by an image pickup apparatus (2) is recorded and a second recording mode in which video image data captured when an abnormality has been detected is recorded separately from the first recording mode; and a recording controller (13) configured to restrict the first recording mode for the recording processing unit (12) when the number of times of data rewriting for the recording apparatus (3) has exceeded a first threshold.