Digital surveillance system with pre-event recording

  • US 6,421,080 B1
  • Filed: 11/05/1999
  • Issued: 07/16/2002
  • Est. Priority Date: 11/05/1999
  • Status: Expired due to Term
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First Claim
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1. An image recording system for use with a surveillance system having at least two cameras comprising:

  • an image recording processor connected to the at least two video cameras for receiving generated video images and image creation time identifying information;

    a temporary storage device connected to the image recording processor and having a storage capacity large enough to store video images generated over a predetermined period of time;

    a long-term storage device connected to the image recording processor; and

    a sensor arrangement for detecting an occurrence of a pre-defined triggering event associated with each camera, wherein the image recording processor is arranged to continuously record video images from each camera into the temporary storage device, and in response to the sensor arrangement detecting the occurrence of a triggering event associated with any of the at least two cameras, subsequently recording temporarily stored pre-event video images generated over a predetermined period of pre-event time by the associated camera into the long-term storage device.

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