An Experimental Electronic Background TV Projection System
The system is an electronic version of the process screen now used in motion pictures and television. Two television cameras may be mixed without superimposition. A contrasting white background screen in back of the foreground subject, which is always brighter than the subject, provides contrasting information. This information keys the two cameras on or off through an electronic switch. Details of the signal selection, modification of the keying signals and the use of delay lines are discussed.
- Print ISSN
- 0898-042X
- Published
- 1950-07
- Content type
- Original Research
- DOI
- 10.5594/J05175
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