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A Guide to Digital TV

What is Digita| TeJevision?

Digital television (DTV) is a new way of transmitting high quality video and audio to

)7ol:LrTV set. Using DTV, broadcasters can transmit high definition TV (HDTV) images

Dolby digital sl:trroumd al:tdio and new services st:tch as nn:dticasting (transmitting more

than ore' program on the sam_' TV channel) and datacasting (providing electronic

program guides and interactiw' teh'vision). Svw'ral of these scrvict's can be combin{'d into

a singh' digital broadcast.

Digital Television Services

Digital Picture Quality

DTV programs arc transmitted m two difierent f_wnmts. The tirst is Standard Definition

Tch'vision (SDTV) and the' second is High Definition Teh'vision (HDTV).

8DTV program kwmats include 480-1im' interlaced (480i) and 480-line progressive

(480p) vi(h'o, q80i programs arc essentially a digital version of oL:trcl:trrent analog TV

programs, while the 480p ku_mat oih'rs inlprow, d image &'tail ow'r 4801. Som_' 480p

programs are broadc;tst in w[dvscrven and ar_' comparabh' to progrvssiw'-scan DVD

movies m image qltalit),.

HDTV program iormats include 1080-line interlaced (10801) and 720-line progressive

(720p). Both HDTV formats are always broadcast in w[descreen, and offbr mctch higher

picutre qttality than SDT\_

DoJby Surround Sound

With DTV you can listen to a variety of Dolby digital al:tdio formats irom Dolby

Sutrrocmd 2.0 to Dolby Digital 5.1 st:trrocmd t:tsing yot:tr home audio s) stein. Man)

HDTV programs arc nov,-broadcast with DD 5.1 soundtracks.

Interactive Communications and Oatacasting

DTV will allow you to interact with your television; choosing programs h*om a detailed

program gt:tide or&'ring produtcts on-lint' while watching T\I and acc_'ssing ancillar)

data abot:tt a program.

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