Video surveillance system including video recorder timing control device

摘要

Video surveillance system includes a timing device which enables a user to preset the "on" and "off" times of a video recorder receiving the output of a television camera, thereby allowing more events to be recorded on a given length of recording media. The recorder is switched on for a preset period of time in response to an output from an event sensor eg a PIR detector, and is then switched off for a further preset period of time, remaining in the off state until triggered again by the sensor output. The timing device may be overridden to allow the camera output to be recorded as long as the PIR detects a presence.