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5,s G[ossarv - Standard Oefiinitions
Analog TV: Today's TV system using radio frequency waves to transmit and display pictures and sound.
Aspect Ratio (4x3): Traditional TV "aspect ratio", that is, the screen's width as compared to its height.
For example, a "32 inch TV screen" would be 25 inches wide and 19 inches tall.
Aspect Ratio (16x9): "Wide screen TV" aspect ratio which is more like a movie screen than a traditional
TV. For example, a "32 inch TV screen" would be 28 inches wide and 16 inches tall.
Digital TV (DTV): Television delivered and displayed using radio frequency waves that contain
information that is digitally encoded for improved quality and efficiency.
Enhanced Definition TV (EDTV): A better digital television transmission than SDTV with at least 480P,
in a 16x9 or 4x3 display and Dolby digital surround sound. 480P is the quality used by most DVD players.
EDTV provides 300-400,000 pixels.
HDTV Monitor (sometimes called HDTV Ready): A set that can display HDTV programming if you have
a separate HDTV tuner, HD Cable Set-Top Box or HD Satellite Set-Top-Box Receiver.
HDTV Tuner (also decoder, receiver, set-top box): A device capable of receiving and outputting HDTV
signals for display, tt may be stand-alone or integrated in the set.
High-Definition Television (HDTV): The best quality picture, wide screen (16x9) display with at least
720 progressively scanned lines (720P) or 1080 interlaced lines (1080i) and Dolby digital surround sound.
HDTV provides 900,000-2.1 million pixels.
Integrated HDTV" An HDTV that has the digital tuner built into the set. It does not need a separate set-
top box to receive over-the-air DTV signals.
Interlace Scan: A way to scan vertical lines onto a TV picture by scanning all the odd lines first, then
filling the in the even lines (this happens instantaneously).
Plug-and-Play or Digital Cable Ready: A DTV or other device for digital cable consumers that plugs
directly into the cable jack and does not require a separate set-top box. Plug-and-Play TV owners must
obtain a CableCARD from their cable company in order to view scrambled programming services.
Progressive Scan: A way to scan vertical lines onto a TV picture by scanning all the lines consecutively
(progressively).
Standard Definition TV (SDTV): Basic digital television transmission that may be displayed with fewer
than 480 progressively scanned lines (480P) in 16 x 9 or 4 x 3 format. 480 interlaced (480i) is the quality
of today's analog TV system.
Soulce: Buying a Digital Te evisio_ CEA HDTV Guide 2005
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Version 3/13/2007 53
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