SMPTE RP 157-1995 (R2011)
- Key Signals
- standard by Society of Motion Picture and Television Engineers,
- Category: SMPTE
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This practice describes the format of a key video signal which is used to control the contribution of an associated fill video signal into a composite of two or more signals. Such signals are commonly referred to simply as key signals. This description is given for composite and component analog and digital signals.
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