US 9,911,253 B2
MEMORY MANAGEMENT IN EVENT RECORDING SYSTEMSGeneral
US 9,911,253 B2
MEMORY MANAGEMENT IN EVENT RECORDING SYSTEMS
Tech Center:
3600 Transportation, Construction, Electronic Commerce, Agriculture, National Security and License and Review
Examiner:
Khoi H Tran
Art Unit:
3664 Computerized Vehicle Controls and Navigation, Radio Wave, Optical and Acoustic Wave Communication, Robotics, and Nuclear Systems
Inventors:
James Plante
Assignee:
Priority:
12/08/05
Filed:
12/28/15
Granted:
03/06/18
Expiration:
01/23/26
Abstract
A vehicle event recorder is provided that includes a camera for capturing a video as discrete image frames, and that further includes a managed loop memory and a management system for generating a virtual ‘timeline dilation’ effect. To overcome size limits in the buffer memory of the video event recorder, the maximum time extension of a video series is increased by enabling a reduction in temporal resolution in exchange for an increase in the temporal extension. Memory cells are overwritten in an ‘interleaved’ fashion to produce a reduced frame rate for the recording of certain time periods connected to an event moment. In time periods furthest from the event moment, the resulting frame rate is minimized while in time periods closest to the event moment, the resulting frame rate is maximized.
Cooperative Patent Classification (CPC)
H04H04N21/440281H04NG07C5/0866G07C