A TOTALLY DIGITAL CAMERA SYSTEM USING DIGITAL TRIAXIAL TRANSMISSION

A fully digital broadcast camera system has been developed at Hitachi, in which all signal processing and transmission are accomplished in t he digital domain. The newly developed digital transmission for this s ystem utilizes time division multiplexing and video compression to pro vide bidirectional serial digital transmission over standard triaxial cable. These compression methods allow all video, audio, and control s ignals between the camera head and the camera control unit (CCU) to be combined into a single bidirectional 360 Mbit/sec serial digital sign al for transmission. At the CCU, the received digital video signals ar e digitally rate converted into either an SMPTE 259M composite digital output or a SMPTE 259M component digital output for direct interface to digital studio equipment.