Abstract :
An integral part of a state of the art Alarm Display and Assessment System is the closed circuit television (CCTV) subsystem. It is in this portion of the system where all video signals are switched, recorded, and replayed for surveillance and assessment purposes. This paper presents the implementation of one such CCTV subsystem. This implementation incorporates two Motorola H6809 microprocessors as video controllers that collectively have the capability of initiating the recording of multiple "alarm" scenes, switching any live or recorded video from any camera to any one of the assessment monitors, annotating or identifying all video scenes, verifying the presence of video on all cameras, and reporting critical component failures to a "host" LSI-11/23 system computer. Included in this system are: a rigid video disc recorder, a video routing switcher, character generators for annotation, a video presence detector, and manual switchers.
