Multi-stage memory buffer and automatic transfers in vehicle event recording systems
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United States of America Patent
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Issued Date -
Jun 14, 2007
app pub date -
Dec 8, 2005
filing date -
Dec 8, 2005
priority date (Note) -
Abandoned
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Abstract
Vehicle event recorder systems are arranged with three stage memories and special mechanism to manage those memories including transfer of data there between. Namely, a managed loop memory receives data from a video camera in real-time and continuously overwrites expired data implicitly determined no longer useful. Data in a managed loop memory is only passed to a more stable memory, a high-capacity buffer memory, in response to an event having occurred. An event trigger produces a signal, which causes data transfer between the managed loop memory and an on-board, high-capacity buffer memory. The high-capacity buffer memory is suitable for storing video series associated with a plurality of events. Finally, a permanent data store is arranged to receive data from the high-capacity buffer memory whenever the system returns and falls within a predetermined proximity of a download station.
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