A Multi-Camera Network Using Radio-Linked Double-System Sound Synchronization

A system using three cameras which allows continuous film recording of seminars, lectures or classes with practically no disturbance to the audience has been developed. The cameras are placed among the audience to provide the best possible photographic angles of the speakers. Each camera functions independently of the others. When a camera is started, a self-contained electronic unit flashes the camera's fogging lamp in a predetermined code while transmitting this same code to the film recorders. At the recorder, this coded signal is received and recorded on a center “control” track through one side of a special dual head; it in no way interferes with the audio program, which is recorded through the second head on a standard edge track. This function clearly identifies each camera during electronic slating without obliterating any portion of the audio program. Each camera, with its own identity code, can operate independently and will be coded, in sync, whenever it starts. Since at least one of the cameras is running at all times, the changing of magazines between “takes” affords continuous filming. The cameramen are in constant wireless radio communications with each other. By simply cutting from one camera to another and allowing some overlap, a wide variety of angles can be achieved to produce a good film.

Print ISSN

0361-4573

Published

1970-06

Content type

Original Research

DOI

10.5594/J10677