Loading ...
Loading ...
Loading ...
A Guide to Digital TV
What is Digital Television?
Digital television (DTV) is a new way of transmitting high qtlality video and alldio to
yoln" TV set. Using DTV_bir_adcasters can transmit high definition TV (HDTV) images,
Do lby digital sln'rol md alldio, and new services sllch as mltlticasting (transmitting more
than one program on the same TV channel) and datacasting (providing electronic pro-
gram gllides and interactive television). Several of these services can be combined into a
single digital broadcast.
Digital Television Services
Digital Picture Quality
DTV programs are transmitted in two different formats. The first is Standard Definition
Television (SDTV) and the second is High Definition Television (HDTV).
SDTV program formats incl.de 480dine interlaced (480i) and 480-line progressive
(480p) video. 480i programs are essentially a digital version of olu" clu'rent analog TV
programs, while the 480p fi_rmat offers improved image detail over 480i. Some 480p
programs are broadcast in widescreen and are comparable to progressive-scan DVD
movies in image % lality
HDTV program fi)rmats inclHde 1080dine interlaced (1080i) and 720dine progressive
(720p). Both HDTV formats are always broadcast in widescreen, and offer milch higher
picn u'e % lality than SDTM
Dolby Surround Sound
With DTV_yo. can listen to a variety of Dolby digital a.dio formats fl'om Dolby
S.rro.nd 2.0 to Dolby Digital 5.1 s.rro.nd, Hsing yoHr home a.dio system. Many
HDTV programs are now broadcast with DD 5.1 so.ndtracks.
Interactive Communications and Datacasting
DTV will allow yo. to interact with yo.r television; choosing programs fi'om a detailed
program gl fide, ordering prodllcts on-line while watching TV_and accessing ancillary
data abo.t a program.
Loading ...
Loading ...
Loading ...