Acronyms/Nomenclature
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Section 12: Acronyms/Nomenclature
1080i:
high-definition signal with 1080 scanning lines and interlaced (“i”) scanning. This contains up
to six times the detail of conventional TV pictures.
720p:
high-definition signal with 720 active scanning lines and progressive (“p”) scanning. Used in
digital television broadcasting, it provides three times the detail of conventional TV pictures.
Active Input
architecture:
properties of the video processor that allow for displaying multiple
channels, zoning, blending, and switching.
Analog:
any signal that varies continuously, as opposed to a digital signal, which contains discrete
levels. A system or device that operates primarily on analog signals.
Aspect ratio:
the ratio of a picture’s width to height. Most video monitors and televisions display a
4:3 image; however, widescreen displays 16:9.
BNC:
a type of coaxial cable connector, often used for component video inputs.
Brightness:
the overall light level of an image. Brightness measures the difference in range when
comparing white to dark tones and colors. It is also called black level and black reference.
Calibar:
pocket-size, portable video calibration device that produces 24 test pattern functions.
Chrominance:
the color component of a video signal, abbreviated C. Chrominance is combined with
the black-and-white signal (luminance) in composite video connections, but kept apart in S-Video
and component connections. For higher quality, the single chrominance signal can also be divided
into B-Y and R-Y components in Y/PB/PR component connections, or into the primary colors of Red,
Green, and Blue for R/G/B component connections.
Color Space Conversion:
a video processor feature that changes NTSC and PAL color values to LED
color values, ensuring accurate color reproduction.
Component video connections (Y/PB/PR):
the best method for connecting analog video signals.
Y/PB/PR is ideal for DVD players and compatible satellite receivers. It uses separate connections for
luminance (Y), blue color difference (PB), and red color difference (PR).
Component video connections (R/G/B):
the best method for connecting analog video signals. R/G/B
is ideal for HDTV receivers and computer signals. It uses separate connections for Red (R), Green (G),
and Blue (B).
Composite (COMP):
a video signal in which the luminance (black and white information) and
chrominance (color information) are combined on the same wire using one of the coding standards:
NTSC, PAL, SECAM, etc. Picture quality is lost whenever chrominance and luminance are stripped
apart.