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ecommended to disable SVM on a properly calibrated monitor; one of the first
things an ISF calibration job do is to find a way to disable SVM; look for a menu
setting that is able to turn off SVM.
SDTV (Standard Definition TV): Lowest level of DTV that originally grouped the
480i and 480p formats together within that category (ATSC table III), see DTV. In
late 2000, the CEA promoted the 480p to EDTV, leaving the SD level for just 480i
digital.
Shadow Mask: Metal plate on a CRT device that helps the electron beam hit each
individual phosphor by using perforated holes. See Invar.
Sharpness: Term to describe apparent focus and edge definition on video.
Sharpness should be kept below the point at which extra edges are added to objects
in the image.
Spatial Interpolation: Technique that calculates additions/removals of pixels in a
digital image using weighted averages of information from adjacent pixels, producing
a more transparent result with fewer artifacts. The technique facilitates the repositioning
or re-sizing of digital images.
Spatial Resolution: Number of pixels appearing on the entire video image (matrix
of horizontal and vertical resolutions combined).
S/PDIF: Sony/Philips Digital Interface standard for digital audio connections
(coaxial or optical TosLink). A consumer version of the AES/EBU digital transmission
standard.
Special Picture Tube: Better grade of picture tube, such as either dark tint or dark
glass picture tubes, which, by darkening the faceplate, provides greater contrast
between black and white, although requiring an increase of brightness levels so that
the picture does not appear too dark.
Other advancements include flat square tubes (FST) sometimes called "SuperFlat" or
"FSTPerfect", which offers less distortion on the outer edges of the picture. Some
manufacturers use special coatings to help cut down on glare and dust build-up
giving the appearance of a richer picture, others use a combination of techniques to
tweak out the highest performance from their picture tubes.
STB (Set-Top-Box): Also mentioned as HD-STB, Digital set to box to tune DTV via
OTA, cable or satellite signals.
Subwoofer: Loudspeaker designed and dedicated to reproduce very low
frequencies (bass) from the .1 LFE Dolby Digital or DTS channel, and/or from the
bass received from the other channels if their lower frequencies are crossed-over to
the sub with a low-pass control. A subwoofer normally looks like a big black box.
Since bass is non-directional, it can be placed anywhere in the room. Woofers range
in size from about 5-inches to 18-inches in diameter with the majority falling in the
12-inch category.
Some of these enclosures are ported with a hole on the side or the bottom, which
helps add a thump to the bass response.
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