Society of Motion Picture and Television Engineers - RP 157:1995

Key Signals

inactive - Reaffirmed , Superseded by
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Organization: Society of Motion Picture and Television Engineers
Publication Date: 1 January 1995
Status: inactive
Page(s): 1 - 2
ICS Code (Video systems): 33.160.40
ICS Code (Television and radio broadcasting): 33.170
ISBN (Online): 978-1-61482-173-1
DOI: 10.5594/SMPTE.RP157.1995
Standard:

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... View More

Document History

November 1, 2012
Key and Alpha Signals
This document describes the requirements for the key, alpha or matte signal with respect to its associated fill. In the remainder of the document the term “key” is used, but the requirements are...
April 20, 1999
For Motion-Picture Film (8-mm Type S) — Camera Aperture Image and Usage
(1.1) This standard specifies the dimensions of the camera aperture image and its relative position to the reference edge and the perforations of 8-mm type S motion-picture film, as specified in...
RP 157:1995
January 1, 1995
Key Signals
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...
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