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HDTV Article Series
Buying
a High Definition Television (HDTV)
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5 Benefits of Buying an HDTV
High Resolution
HDTV offers a higher resolution than most conventional television
sets. In addition, HDTV’s can display full HDTV and DTV signals,
which results in a sharper picture.
Analog televisions have approximately 480 active scanning
lines. This results in a resolution of about 330 lines. A VHS
VCR has approximately 240 lines of resolution. This is why
VHS doesn’t look as clear as the original picture. DVD’s provide
about 480 lines of resolution. HDTV’s, on the other hand, provide
about twice as much resolution as an analog television.
HDTV is part of the DTV specifications set forth by the FCC.
Many video resolutions fall within the umbrellas of DTV. The
two main resolutions are 1080i and 720p. The “I” means interlaced
and the “p” means progressive. For both, every second has 60
frames of video. Interlaced resolution transmits 30 frames
of even lines, then 30 frames of odd lines every second. Progressive
resolution, on the other hand, puts 60 entire frames on the
screen every second.
An HDTV with 720p resolution has 1280 x 720 pixels, for a
total of 921,600 pixels. The 1080i has a resolution of 1920
x 1080 pixels, which totals 2,073,000 pixels. Some people prefer
the 720p resolution because it provides a more “stable” picture,
claiming the 1080i resolution can cause a flicker effect. The
1080i resolution, however, provides a far greater number of
pixels. HDTV receivers are capable of receiving both types
of resolution and converting them to the format used by the
television display. Either way, the resulting resolution on
an HDTV is far supreme to the picture found on an analog television.
No Scanning Lines
The
720p resolution provides a crystal clear image and almost
completely eliminates scanning lines. This is because, as explained
above, the 720P resolution produces all 60 frames of video
every second. Despite the fact that the 1080i rotates 30 frames
every second, it, too, has much less visible scanning lines
because of its use of interlace scanning.
New
1080p technology is something to keep an eye on.
Better Sound HDTV offers digital audio and CD quality surround sound, creating
a much clearer listening experience. Just like CD’s produce
a better sound than audiocassette tapes, the digital audio
sound of HDTV is better than the sound provided by an analog
television. In addition, Dolby Digital 5.1 included in many
HDTV programs. To take advantage of the surround sound, however,
it is necessary to have 5.1 speakers.
Panoramic View
High Definition TV’s provides a much larger viewing area than
regular analog television. The majority of analog television
sets are produced with a 4 by 3 aspect ratio. This means that
the screen is 4 units wide by 3 units high. Theatrically released
movies, however are generally produced in a much wider aspect.
This is down in order to take advantage of the field of vision,
which is wider horizontally than it is tall. Because HDTV signals
are transmitted in a 16 by 9 aspect ration, it is more like
the screen used in movies. Therefore, HDTV viewing is more
realistic and panoramic.
Wave of the Future
The FCC has passed a multitude of regulations regarding HDTV.
Among these regulations is that all television broadcasts must
be transmitted in HDTV by 2006. Analog televisions, however,
will not be able to take advantage of this technology.
Consequently, HDTV allows the viewer to view his favorite
television shows in HDTV format, creating a more “real life”
experience, with a clearer, crisper picture. In addition, most
cable companies now offer HDTV as a standard part of their
cable package. Therefore, consumers don’t have to purchase
a special HDTV television or an HDTV-ready television with
an HDTV set-top-box.
In addition, new videogame system consoles are taking advantage
of HDTV, claiming the graphics of the games themselves will
be clearer when played on an HDTV television. HDTV tube televisions
are also better than plasma televisions for the videogame player
because plasma televisions will experience what is called “color
burn” on their plasma televisions. Color burn is when an image
is permanently “burned” into the television, just like what
can happen to a computer monitor if it doesn’t utilize a screen-saver.
With all of the benefits of HDTV, it is little wonder most
consumers are making HDTV television sets their next television
purchase.
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SolveYourProblem.com : 2007
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