A New Approach to Overlay in Monochrome Television
Overlay or replacement of parts of a monochrome TV picture with corresponding parts of a different picture is accomplished with a new technique using pulsed-light background which enables a silhouette switching pulse to be derived by means of suitable video processing requiring a field-storage delay. This pulse is independent of the tonal range of the subject being overlaid, thus avoiding certain disadvantages of the conventional brightness separation method.
- Print ISSN
- 0361-4573
- Published
- 1969-10
- Content type
- Original Research
- DOI
- 10.5594/J10791
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