SMPTE RP 157
Key and Alpha Signals
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| Organization: | SMPTE |
| Publication Date: | 1 November 2012 |
| Status: | active |
| Page Count: | 7 |
scope:
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 equally applicable to all three. This description is given for digital and analog signals and is valid for all image formats, including without limitation SDTV, HDTV and UHDTV.
Document History
SMPTE RP 157
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...