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Glossary
Aspect Ratio The ratio between the width and height of the TV picture on the screen. In a normal TV set the aspect ratio is 4
to 3 (4:3). The new aspect ratio in HDTV is 16:9 which resembles the aspect ratio in a movie theatre
(Widescreen). New TV systems support both 4:3 and 16:9 aspect ratio and can automatically switch between
them.
Audio Video (A/V) A term often used when discussing a channel on a TV receiver or on video equipment, which has been especially designed
to accept VCR audio-video signals. This channel automatically activates special circuitry within the TV set to prevent picture
distortion and skewing. It is also used for audio-video processors, which handle both types of signals.
ATSC ATSC: Advanced Television Systems Committee. Formed to establish technical standards for advanced television systems,
including digital high definition television (HDTV).
CVBS Composite Video Baseband Signal. In broadcast television this refers to the video signal, including the colour information
and syncs.
CVI (Y Pb Pr) CVI (Component Video Input) is a type of connection that uses a cinch-type connector to allow set top boxes or analog
DVD players to connect a signal to the TV. By offering the cinch-type input (YPbPr) the primary colors, red, green and blue
are connected from a set top box directly into the TV allowing for the signal to display on the screen.
DTV Digital television. Generic term that refers to all digital television formats, including high-definition television (HDTV) and
standard-definition television (SDTV).
DOLBY Digital Dolby Digital - Six-channel digital audio standard that is part of the U.S. digital television standard; also called AC-3 or Digital
5.1. The channels consist of front left, front right, front center, surround or rear left, surround or rear right, and a separate
subwoofer
Digital Tuner A digital tuner serves as the decoder required to receive and display digital broadcasts. It can be included inside TV sets or
via a set-top box.
HDTV The generally agreed upon definition of HDTV is approximately twice the vertical and horizontal picture resolution of
today’s NTSC TV, which essentially makes the picture twice as sharp. HDTV also has a screen ratio of 16:9 as compared
with most of today’s TV screens, which have a screen ratio of 4:3. HDTV offers reduced motion artifacts (i.e. ghosting, dot
crawl), and offers 5.1 independent channels of CD-quality stereo surround sound, (also referred to as AC-3).
NTSC National television system committee. The organization that developed the analog television standard currently in use in the
U.S., Canada, and Japan. Now generally used to refer to that standard. The NTSC standard combines blue, red, and green
signals modulated as an AM signal with an FM signal for audio.
Progressive Scan In Progressive Scanning all the horizontal scan lines are scanned on to the screen at one time. The Digital TV and HDTV
Standards accept both Interlaced Scan and Progressive Scan broadcast and display methods.
Resolution Resolution: A measurement of the finest (smallest) detail that is visible in a video image. TV Resolutions may be expressed as
number of pixels in an image; or more commonly, “As Total Number of (horizontally scanned) Lines used to create the
image.
Standard Digital TV Resolutions:
SDTV: 480i - The picture is 704x480 pixels, 480p - The picture is 704x480 pixels.
HDTV: 720p - The picture is 1280x720 pixels, 1080i - The picture is 1920x1080 pixels, 1080p - The picture is 1920x1080
pixels.
SPDIF SPDIF (Sony and Philips Digital Interconnect Format) is highly recommended for high quality digital sound output.