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GLOSSARY
28
ning technique that doubles the num-
ber of picture lines, eliminating the
flicker and providing a jitter-free
picture.
PTV • Projection Television. (Rear-
and/or front-projection design systems
are available.)
QAM • Also known as “Cable in the
clear,” QAM is an unscrambled digital
cable signal.
RGB • Red, green, and blue signal.
These are the primary colors of light
that are used to produce a picture in
television. By mixing levels or R, G, and
B, all colors (chrominance and lumi-
nance) are reproduced.
RF • Radio Frequency or modulated
signal design used as the carrier for tel-
evision broadcasts.
Second Audio Program (SAP) •
An additional audio channel provided
for in the Multichannel Television
Sound (MTS) broadcast standard. A
monaural soundtrack included within
the recorded or video signal (usually
containing a second language transla-
tion for the displayed programming).
SPDIF • (Sony/Philips Digital
Interface) is a standard audio transfer
file format that elimates the conver-
sion to and from an analog format,
which could degrade the signal quali-
ty.
S-Video Input • Signal input that
allows direct connection of high-resolu-
tion video sources, such as a satellite
receiver, DVD player, S (Super)-VHS
videocassette recorder, or video
games. Provides improved picture res-
olution, sharpness, and clarity.
Twin–lead Wire • The more com-
monly used name for the two-strand,
300-ohm antenna wire used with many
indoor and outdoor antenna systems.
In many cases, this type of antenna
wire requires an additional adapter (or
balun) to connect to the 75-ohm input
terminals designed into the more
recent TVs and VCRs.
480p • Digital picture format with 704
x 480 pixels, sent at 60 complete
frames per second. This is the output
format of progressive-scan DVD play-
ers.
1080i • Digital high-definition picture
format with 1920 x 1080 pixels, sent at
60 interlaced frames per second (30
complete frames per second).
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