Background
Digital Television (DTV) is a new type of broadcasting technology that will
transform your television viewing experience. DTV enables broadcasters to offer
television with movie-quality picture and sound. It also offers greater
multicasting and interactive capabilities.
Why Are We Switching to DTV?
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DTV is a more flexible and efficient technology than the current broadcast
system, which is an “analog” system.
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For example, rather than being limited to providing
one analog programming
channel, a broadcaster will be able to provide a super sharp "high definition"
(HDTV) program or multiple "standard definition" DTV programs simultaneously.
Providing several program streams on one broadcast channel is called
"multicasting." The number of programs a station can send on one digital channel
depends on the level of picture detail, also known as "resolution," desired in
each programming stream. DTV can provide interactive video and data services
that are not possible with “analog” technology.
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Converting to DTV will also free up parts of the scarce and valuable
broadcast airwaves. Those portions of the airwaves can then be used for other
important services, such as advanced wireless and public safety services
(police, fire departments, rescue squads, etc.).
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What is High Definition TV (HDTV)?
HDTV is a type of DTV service. HDTV provides
high resolution programming in a widescreen format.
A current analog TV picture provides
resolution of up to 480 horizontal lines. An HDTV picture can have
up to 1080 lines, allowing for stunning picture detail.
Widescreen format refers to an image's aspect
ratio, which is a comparison of screen width to screen height.
Analog television has an aspect ratio of 4 by 3, which means the
screen is 4 units wide by 3 units high. The aspect ratio of HDTV
is 16 by 9, the same as the wide scope of a movie theater screen.
HDTV programs can include Dolby digital
surround sound, the same digital sound system used in movie
theaters and on DVDs.
When Will the DTV Transition Be Complete?
Television stations serving all markets in the United States are airing
digital television programming, although they still must provide analog
programming until the target date set by Congress for the completion of the
transition to DTV - December 31, 2006. That date may be extended, however, until
most homes (85%) in an area are able to watch the DTV programming. At that
point, broadcasting on the current (analog) channels will end and that spectrum
will be put to other uses.
Until the transition to DTV is complete, television stations
will continue broadcasting on both their digital and analog
channels.
How Do I Get DTV?
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Receiving DTV signals over the air requires an antenna and a
new DTV receiver that can decode the digital signals. In general,
an antenna that provides quality reception of over-the-air analog
TV signals will work for DTV reception.
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Cable and direct broadcast satellite (DBS) subscribers will
need a new DTV receiver and other special equipment to receive DTV
programming. A "Plug-and-Play" or "Digital Cable Ready" DTV or
other device for digital cable customers plugs directly into the
cable jack and does not require a separate set-top box. You must
obtain a CableCARD from your cable company to receive high
definition scrambled programming and premium one-way services.
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A listing of the operational DTV stations is available at
http://www.fcc.gov/mb/video/files/dtvonair.html. Satellite TV
providers and most cable systems are currently offering DTV
programming. Subscribers should check with their service providers
to see what programming is available in their area.
Will I Need a New TV?
Your current television will work until analog broadcasting
stops. Even after the transition to DTV is over, you will be able
to use your current TV with a converter set-top box. A converter
box can be used to receive DTV signals and change them into the
format of your current television. Converters for over-the-air
broadcasts are available at retail stores.
But remember, even with a converter, your
current analog television will not display the full picture
quality of DTV. To enjoy the full picture quality, you must have a
DTV set.
Subscribers to cable and DBS services should
contact their providers to inquire about converters for those
services.
What Do DTV Sets Look Like and What Will They
Cost?
Most DTV sets have wider, more rectangular
screens than current analog TVs. This widescreen format allows for
wider images that are more like those you see in a movie theater.
Like current TV sets, a range of sizes is available.
As with most new consumer electronics
technologies, DTV sets have become less expensive since their
introduction. Prices are expected to continue to decrease over
time and will vary depending on screen size, display technology,
and other features.
What Is the Difference Between Integrated DTV
and DTV Monitors?
An Integrated DTV set is a digital television
with a built-in digital decoder or DTV receiver. If you have an
Integrated DTV and live in an area served by a DTV broadcast
station, you will not need any additional equipment, with the
exception of an antenna (preferably an outdoor antenna) to receive
over-the-air DTV broadcast programming. Integrated TVs can usually
receive and display current analog signals also.
In contrast, a DTV monitor is not capable of
receiving DTV programming without additional equipment; it is
simply a display device similar to a computer monitor without the
computer processor. A DTV set-top decoder must be connected
between the antenna and the monitor to receive and display
over-the-air DTV programming.
Confirm with your retailer that the DTV
receiver or set-top decoder is compatible with the DTV monitor
that you are purchasing. Most monitors have a built in analog
receiver and can display regular analog TV programming. They can
also display standard resolution video from DVD players and VCRs.
Will Integrated DTV and DTV Monitors Display
HDTV?
Integrated DTV sets and DTV monitors do not
necessarily display programming in full HDTV format. Some
integrated sets and monitors will display DTV in lower-resolution
“enhanced definition” or "standard definition” format. So although
sets may be marketed with labels that imply HDTV resolution, check
with your retailer before purchasing if you want HDTV quality.
Why Can’t We Have Both DTV and the Television
System We Now Have?
Broadcast and wireless services depend on the
use of the airwaves. DTV technology is much more efficient than
the current analog technology and will allow the broadcast of more
program material using fewer broadcast airwaves. Transitioning out
of the analog format will free up resources for other new and
innovative services to American consumers.
For More Information
For more information
about DTV, see the FCC Web site
www.dtv.gov.
For information about
other telecommunications-related issues, contact the FCC's
Consumer & Governmental Affairs Bureau:
Internet at
www.fcc.gov/cgb
Consumer Center:
1-888-CALL-FCC (1-888-225-5322) voice
1-888-TELL-FCC
(1-888-835-5322) TTY
Address: Federal Communications Commission
Consumer & Governmental Affairs Bureau
445 12th Street, SW Washington, D.C. 20554
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