The Nonadditive Mixing of Television Signals

A method of combining video signals for lap dissolves is described in which at every instant the larger signal is transmitted and the smaller signal is suppressed. This nonadditive method of combining signals has the advantage over the customary mixing methods of keeping the output video level constant, independent of the distribution of peak-to-peak voltages in the input signals. A secondary advantage of this method of performing dissolves is that the same equipment may be used for the generation of keyed inserts and for the production of special effects.

Print ISSN

0361-4573

Published

1964-08

Content type

Original Research

DOI

10.5594/J07203