Atsc

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: 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

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.

ResolutionResolution: 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, 1O8Oi - The picture is 1920x1080 pixels, 1O8Op - The picture is 1920x1080 pixels.

ATSC

CVBS

DOLBY

HDTV

NTSC