DigitalVideoAndHDTVAlgorithmsAndInterfaces.pdf

SDTI Serial data transmission interface: A SMPTE-standard variant of
SDI used to convey arbitrary data instead of uncompressed digital
video.
SDTV Standard-definition television: A video system whose image
comprises fewer than 3 ⁄4-million pixels. The most widely deployed
SDTV broadcasting systems are 480i (see page 611) and 576i (see
page 611).
SECAM Séquential couleur avec mémoire: A composite video (1) system
based on line-alternate B’-Y’ and R’-Y’ color difference signals,
frequency modulated onto a subcarrier, then summed with luma.
Neither quadrature modulation nor frequency interleaving is used.
SECAM is used for broadcast in certain countries with 576i scanning
(e.g., France and Russia). SECAM production equipment has
fallen into disuse: 576i component equipment or PAL composite
equipment is used instead, and the signal is transcoded to SECAM
prior to transmission.
Second field In interlaced scanning, the second field of the pair of fields
comprising a frame. In analog 480i, the field whose first equalization
pulse starts midline. In analog 576i, the field whose first
broad pulse starts at midline. (See also Field dominance, and First
field, on page 629.)
Serration In bilevel sync, the interval between the end of a broad pulse and
the start of the following sync pulse. This term refers to the
absence of a pulse rather than the presence of one, and is deprecated
in favor of the terms equalization, broad, and normal sync
pulses.
Setup Black level expressed as a percentage of the blanking-to-reference-white
excursion. Conventionally 7.5% in System M and the
archaic EIA RS-343-A; and zero in all other systems, where
blanking level and black level are identical. Setup is properly
expressed as a percentage; it is incorrect to express setup in
voltage, level, or IRE units. See also Pedestal, on page 641.
Sidebar format Pillarbox format.
SIF, source input format A term from MPEG-1 that denotes a progressively scanned raster
with 4:2:0 chroma subsampling, having either 352×288 luma
samples at 25 frames per second, or 352×240 luma samples at
29.97 frames per second. Video in this format is ordinarily
subsampled from 576i or 480i SDTV, respectively.
SMPTE Society of Motion Picture and Television Engineers: A professional
society that is also an ANSI-accredited standards-writing
organization.
SPD Spectral power distribution: spectral radiance.
S PW , samples per
picture width
The number of samples in a scan line corresponding to the width
of the picture, measured at the 50% points of a white flatfield.
GLOSSARY OF VIDEO SIGNAL TERMS 647