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More and more TV shows, movies and sporting events are being
broadcast in High Definition (HD) -including “Good Morning America.” If you
want to join the millions who are already experiencing a superior picture,
you’ll need a High Definition TV (HDTV). But even if you’re ready to retire
your old TV-or move it into the back bedroom where no one will ever see it-you’re
bound to have lots of questions before you make an investment in a new
drool-worthy HDTV.
You might be wondering about hardware, cost and how to actually receive
High Definition programming on your set. “GMA” technology contributor Becky
Worley offers this instruction to understanding the complicated world of HD.
What is HDTV ①?
High definition TV is a richer transmission of television
signals that makes for a more vivid viewing experience. HDTV is to
standard TV what FM radio is to AM radio. HDTV is
crisp, clear and noise-free, with resolution that is at least twice that of
analog (模拟信号)television
and CD-quality sound.
How Do I Get HDTV ②?
HDTV signals are broadcast via antennas (天线)in urban areas, and via satellite
TV or cable TV.
To receive an over-the air HDTV signal, you must live within
a certain radius(半径)of an HDTV
broadcast antenna and have the proper HDTV tuner (调谐器) or antenna installed in your
home.
To
receive a Cable or Satellite HDTV signal, you must have a proprietary (专利的)HDTV set-top box supplied by your provider.
Not all programming is available in HDTV yet, but many
network shows and sporting events are currently in HD and many more are converting
over.
When you watch a DVD on your HDTV, it is not technically HDTV
quality, but it will look crisper on your HDTV than on a regular TV.
HDTV, HD-Ready TV, and
EDTV
There are three major terms that will describe the high-end TV
sets that are on sale today :HDTV ③ are TV sets that can receive and
process over-the-air HD signals. You may need an antenna to receive the
HD signal, but an HD tuner is built into the set and can process the
signal without any other equipment. If you want to receive an HD signal
from your cable or satellite provider, you will need one of the provider’s
proprietary set-top boxes.
HD-Ready TV are TV sets
that need an additional piece of hardware to actually receive the HD signal,
such as a stand-alone HD tuner (from $250 and up) or the set-top HDTV
box provided by your cable or satellite TV company.
EDTV stands for Enhanced Digital
Television. The visual quality of an EDTV is better than a standard
analog TV, but is not as crisp or bright as a true HDTV.
65.Which of the following best
describe the features of HDTV?
A.It offers programs with clearer
pictures and sound of better quality.
B.It offers more interesting and
entertaining programs.
C.It offers more TV channels and
choices of programs.
D.It offers program for high
technology
66.“HDTV is to standard TV what FM
radio is to AM radio.” in this passage is
.
A.an example to show HDTV is
different from common TV.
B.an example to show the similarity
between HDTV and FM radio.
C.a comparison to show HDTV is more
advanced than common TV.
D.a comparison to show HDTV is better
than FM radio.
67.As for the meaning of “HDTV” in
different places (①②③) of this article, which of the following statement is TRUE?
A.①and ③carry the same meaning while ②carries different meaning.
B.①and ②carry the same meaning while ③carries different meaning.
C.②and ③carry the same meaning while ①carries different meaning.
D.①, ②and ③all carry the
same meaning.