Memory management in event recording systems
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United States of America Patent
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app pub date -
Dec 8, 2005
filing date -
Dec 8, 2005
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Abstract
In vehicle event recorders which capture video as discrete image frames, a managed loop memory and management system is provided to realize a virtual `timeline dilation` effect. For a buffer memory of limited size, the maximum extent of a video series in time is extended by trading a reduction in temporal resolution for an increase in temporal range. Memory cells are overwritten in an `interleaved` fashion to effect a reduced frame rate for certain periods in relation to an event moment. In time periods furthest from the event moment, an effective frame rate is minimized while at time periods closest to the event moment, an effective frame rate is maximized.
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