The Use of Electronic Masking in Color Television

The nature of the "reproducing primaries" employed by most subtractive color processes is such that undesirable cross-coupling exists between the various color separation images originally recorded by the taking sensitivities of the film. When using subtractive color transparencies as original material for color television transmissions, the output signals from the pickup device may be thought of as integral density measurements of the film. If the characteristics of the film are known, it is possible to devise an electrical network which will partially remove the photographic crosscoupling. For some types of subtractive transparencies color television reproduction is subjectively enhanced by this procedure