of Unique Features You'll Find On A HDTV Rear-Projection Television
To help customers evaluate the features they may want
in a HDTV wide-screen rear-projection television set, here is an example
of the unique features found in Sony's rear-projection set.
I own a new Sony 57-inch diagonal HDTV, rear-projection wide-screen
television, and I'm impressed with the quality, detail, contrast,
and convergence of the HDTV picture. So I thought you might want to
check out the hot specs on a Sony HDTV set. Be aware other manufacturers
may have similar features but with different copyrighted logos or
Please note that while these similar helpful circuits
may be found in other HDTV rear-projection sets, the descriptive headlines
shown below are Sony's trademarks. All descriptions are taken
directly from Sony's online spec sheets and have not been edited
for any reason.
High scanning/HD monitor/HD upgradeable
These televisions accept the full 1080 interlaced
scanning lines (1080i) from an external High Definition receiver
or High Definition DIRECTV receiver. They also accept the 480 progressive
scanning lines (480p) from progressive output DVD players. In both
cases, the picture is vastly more detailed than conventional television,
which uses 480 interlaced scanning lines (480i). The difference
is dramatic, especially in the larger screen sizes. In big 480i
screens, the scanning lines are so large that they can become visible,
undermining the sense of reality. In high scanning televisions,
the scanning lines blend seamlessly together into a more realistic,
more emotionally compelling image.
Digital Reality Creation circuitry
High scanning televisions generally boost
conventional 480i sources to higher line rates, such as 960i or
480p. Even though the picture resolution does not change, you get
a more seamless, more satisfying image on the big screen. A big
step up from a line doubler, Sony's family of Digital Reality Creation
circuits does an even better job. By replacing analog picture patterns
with their High Definition digital equivalents, DRC doubles the
number of scanning lines and doubles the number of pixels on each
line. You get pictures with four times the original picture density-approaching
the quality of High Definition!
3-2 reverse conversion is a technology employed
in Sony high scanning televisions. It overcomes the problems that
can sometimes occur when movie film, which is shot at 24 frames
per second, is displayed on progressive scanning televisions, which
operate at 60 frames per second. In order to display 60 frames,
some televisions take scanning lines from two adjacent movie frames
and force-fit them into one television frame.
This makes a hash out of any object that's
moving on the screen. Vertical edges that should be smooth take
on a disturbing, zipper-like texture. And this unwanted artifact
happens frequently, occurring on two out of every five video frames!
To make matters worse, the problem is not limited to those times
when you're watching movies. Most prime-time dramas, music videos
and commercials are also shot at 24 frames per second.
That's why CineMotion 3-2 reverse pull-down
is so important. It analyzes the picture, identifying the difference
between footage shot on interlaced video and footage shot on film.
For film footage, the system actually retains the integrity of the
original film frames. You'll see a clearer, more stable picture,
especially on scenes with movement.
This feature enables superb, uncompressed
digital-to-digital connection from the set-top box to the television.
Your High Definition signal is carried with full picture quality.
The connection is also secured by HDCP technology to protect the
signal from piracy.
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