7800 Multiframe Manual
7825DSK2-LG(-HD)(-3G) 3G/HD/SD Dual Downstream Keyer
OVERVIEW
Revision 2.0
Page 1-5
NTSC:
National Television Standards Committee established the television and video standard in
use in the United States, Canada, Japan and several other countries. NTSC video consists
of 525 horizontal lines at a field rate of approximately 60 fields per second. (Two fields
equal one complete Frame). Only 487 of these lines are used for picture. The rest are used
for sync or extra information such as VITC and Closed Captioning.
PAL:
Phase Alternating Line. The television and video standard in use in most of Europe.
Consists of 625 horizontal lines at a field rate of 50 fields per second. (Two fields equal one
complete Frame). Only 576 of these lines are used for picture. The rest are used for sync or
extra information such as VITC and Teletext.
Pixel:
The smallest distinguishable and resolvable area in a video image. A single point on the
screen. In digital video, a single sample of the picture. Derived from the words
picture
element
.
Serial digital:
Digital information that is transmitted in serial form. Often used informally to refer to
serial digital television signals.
SMPTE (Society of Motion Picture and Television Engineers):
A professional organisation that
recommends standards for the film and television industries.
SMPTE 12M:
The SMPTE standard for Time and address code. SMPTE 12M defines the
parameters required for both linear and vertical interval time codes.
SMPTE 125M:
The SMPTE standard for bit parallel digital interface for component video signals.
SMPTE 125M defines the parameters required to generate and distribute component video
signals on a parallel interface.
SMPTE 259M-C:
The SMPTE standard for 525 and 625 line serial digital component and composite
interfaces.
SMPTE 272M:
The SMPTE standard for embedding audio in serial digital standard definition
(SMPTE 259M-C) video signals.
SMPTE 274M:
The SMPTE standard for bit parallel digital interface for high definition component
video signals with an active picture of 1080 lines x 1920 pixels.
SMPTE 276M:
The SMPTE standard for transmission of AES/EBU Digital Audio Signals Over
Coaxial Cable
SMPTE 292M:
The SMPTE standard for high definition serial digital component interfaces.
SMPTE 296M:
The SMPTE standard for bit parallel digital interface for high definition component
video signals with an active picture of 720 lines x 1280 pixels.
SMPTE 299M:
The SMPTE standard for embedding audio in serial digital high definition
(SMPTE 292M) video signals.
TRS:
Timing reference signals used in composite digital systems. (It is four words long).
TRS-ID:
Abbreviation for "Timing Reference Signal Identification". A reference signal used to
maintain timing in composite digital systems. (It is four words long.)
