Digital Production Switchers

This article describes the equipment developed for the experimental all-digital studio at Rennes, France. It concentrates on the digital switcher, which constitutes the heart of the studio. Some of the topics covered include the distribution system and its associated switching matrix, four effects buses, and two preset program buses allowing four-plane pictures to be made (two backgrounds and two foregrounds); and accessories such as the electronic pattern generator, colored backgrounds generator, and the subtitling unit. Some new features which are only feasible when using digital processing and recording include downstream chroma key, accurate color correction, and automatic phasing between differing input signals by use of digital signal words.

Print ISSN

0036-1682

Published

1986-03

Content type

Original Research

DOI

10.5594/J03296