1.
Brief Introduction
Terms and Definitions
VSP 168HD User Manual 21
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RS-
232”:
An Electronic Industries Association (EIA) serial digital
interface standard specifying the characteristics of the communication
path between two devices using either DB-9 or DB-25 connectors.
This standard is used for relatively short-range communication and
does not specify balanced control lines. RS-232 is a serial control
standard with a set number of conductors, data rate, word length, and
type of connector to be used. The standard specifies component
connection standards with regard to the computer interface. It is also
called RS-232-C, which is the third version of the RS-232 standard,
and is functionally identical to the CCITT V.24 standard.
“Saturation”:
Chroma, chroma gain. The intensity of the color, or the
extent to which a given color in any image is free from white. The less
white in a color, the truer the color or the greater its saturation. On a
display device, the color control adjusts the saturation. Not to be
confused with the brightness, saturation is the amount of pigment in a
color, and not the intensity. Low saturation is like adding white to the
color. For example, a low-saturated red looks pink.
“Scaling”:
A conversion of a video or computer graphic signal from a
starting resolution to a new resolution. Scaling from one resolution to
another is typically done to optimize the signal for input to an image
processor, transmission path or to improve its quality when presented
on a particular display.
“SDI”:
Serial Digital Interface. The standard based on a 270 Mbps
transfer rate. This is a 10-bit, scrambled, polarity independent
interface with common scrambling for both component ITU-R 601 and
composite digital video and four channels of (embedded) digital audio.
“Seamless Switching”:
A feature found on many video switchers. This
feature causes the switcher to wait until the vertical interval to switch.
This avoids a glitch (temporary scrambling) which normally is seen
when switching between sources.
“SMPTE”:
Society of Motion Picture and Television Engineers. A global
organization, based in the United States that sets standards for base
band visual communications. This includes film as well as video and
television standards.
“S-Video”:
A composite video signal separated into the luma (―Y‖ is for
luma, or black and white information; brightness) and the chroma (―C‖
is an abbreviation for chroma, or color information).
