| THE WORLD OF HDTV -
By Clyde Ernaga Some say they will
wait to buy an HDTV set, others have already done so and ready to
buy again, looking for the latest and greatest. I am in the middle,
meaning I have entered the world of HDTV and thoroughly enjoy what I
have and will wait awhile before purchasing the next big thing! I
wanted to take some time and breakdown the details you need to know
about when purchasing, upgrading or if you are just interested in HDTV.
FORMAT/RESOLUTION
One of the biggest things to look for is the
resolution or format of the HDTV set. The best format you can get
currently is 1080p. This means 1,080 lines of resolution is
contained in each frame of a TV show, movie or video game. Now
the SOURCE needs to start out at 1080p for you to get 1080p. As of
the authoring of this article, all TV shows in HD are either 1080i
or 720p. Video games on Xbox 360 or PlayStation 3 come in 1080p,
1080i, 720p and 480p. Standard DVD's are 480i or 480p with HD-DVD
and Blu-Ray in 1080p. Now there are frame rates, upconverting, frequencies and
other issues us tech geeks talk about, but to keep it simple, format
and resolution is what to watch for. It really depends on what your
budget is and what you really are watching or plan to watch. Here is
a quick breakdown as to what each format is really made up of.
|
FORMAT |
RESOLUTION |
ASPECT RATIO |
PIXELS PER FRAME |
| 1080p |
1920x1080 (Progressive) |
16:9 or
1.78:1 |
2,074,000 |
| 1080i |
1920x1080 (Interlaced or Non-Progressive) |
16:9 or
1.78:1 |
1,037,000 |
| 720p |
1280x720
(Progressive) |
16:9 or
1.78:1 |
922,000 |
| 480p |
720x480
(Progressive) |
4:3 or
1.33:1 |
338,000 |
Through the past 50 years, most TV shows have
been broadcast in 480i resolution. You can see from the table above
that TV shows in 1080i are almost 4 times sharper than 480i. The
reason we can now get a better picture and sound is that television
signals are being sent though as digital signals, not analog. On February 1st, 2006, the US congress
passed a law which in effect requires all Television Stations to
broadcast a digital signal by February 17th, 2009. Now digital does
not mean HDTV! This simply means that with a digital signal,
broadcasters will be able to carry more information than is
currently possible with analog broadcast technology. More space for
the signal allows for a better resolution and picture on your end. Considering the
financial investments currently made by ABC, NBC, CBS and FOX, I do
not foresee them moving to the 1080p format anytime in the immediate future.
All of their equipment is 1080i, with the exception of ABC who went
with 720p. If
you only watch TV shows, you may not need a 1080p capable TV
monitor. With 1080p, you are considering future programming
possibilities, but that fact that HD-DVD, Blu-Ray and video game
consoles like Xbox 360 and PlayStation 3 are producing media in
1080p, this is only going to increase demand for 1080p TV monitors.
So the question is, what are you watching?
CONNECTING THAT MONITOR
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When it comes to connecting your HDTV monitor
to the sources that provide HD signals, the current standard is
HDMI. HDMI stands for HIGH DEFINITION MULTIMEDIA
INTERFACE. Created in 2002/2003, this cable has 19 pins and
can send plenty of UNCOMPRESSED audio and video signal to your HDTV
monitor and sound components. HDMI supports TV and PC formats for
standard, enhanced and high definition video as well as multichannel
audio. If you are looking to purchase a HDTV set, I highly recommend
you connect your sources via HDMI. The other ways you can connect
the video for HD is component video, VGA or DVI cable. The component video and VGA connections will require you to
run separate audio cables such as optical, coaxial or
the standard RCA audio connectors. DVI will carry an
audio signal, but not like HDMI does. The great
thing about HDMI is that it supports Dolby TrueHD and DTS-HD which
are lossless audio streams and used on HD-DVD and Blu-Ray discs. If
you are buying an Audio/Video receiver or other components, be sure
that they have an HDMI connection available. A quick note on
capabilities of your cable connections. Currently, you can get 1080p
signal on all cables mentioned, except for component video. Now
Microsoft claims that 1080p is possible via component video for
games only, not movies via HD-DVD. I know 1080p is good through VGA
and HDMI, but I would just suggest making your
connections all HDMI
and eliminate your audio cables.
CLICK HERE FOR HDMI &
DVI CABLES |
NO MORE BLACK BARS ON MY TV,
RIGHT?
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The passion some of my friends
have over whether or not the "black bars" on a TV screen
bothers them is tremendous. In one camp, they HATE the
black bars and only purchase DVD movies that are "fullscreen".
If you have a medium or small TV, like a 32" or smaller,
seeing the black bars can give you a sense that you are
losing picture size, but it makes for a difficult time
seeing the movie at all. I am in the other camp. Those
fullscreen movies actually can remove anywhere from 7%
to 45% of the original movie!!! 45% of a shot is gone! I
can't stand that! Well, it all has to do with Aspect
Ratio. Now getting a HDTV montior won't do away with
black bars completely, but it will enhance your
enjoyment of big screen movies. Your regular TV (Standard Definition or SDTV)
is close to the shape of a square, or is 4:3
ratio. Most movies filmed before 1950 and all television
shows (pre-HD) are shot in this ratio. HDTV or
"widescreen" televisions are in 16:9 or 1.78:1
ratio. Many movies and current "HD" TV shows are shot in
this ratio. Movies are also shot in 1.85:1 ratio, which
is very close to the 16:9 and epic movies are shot in
2.35:1. If you are watching a fullscreen movie on a 4:3
(SDTV) or even a 16:9 (HDTV) monitor, the movie uses what is call
Pan & Scan or in some cases, Tilt & Scan.
Basically the picture and video artificially moves left
and right (PAN) or in rare instances, up and down (TILT)
to capture the primary action. This is where you lose
picture. With a movie filmed in 2.35:1 like Star Wars,
you lose a character on the screen or see half of a
face, which is not the way the movie was intended to be
seen. The picture can even be squeezed to fit the screen
size. This is called Recomposition. If you watch
a movie or DVD in widescreen or "letterbox"
format, you will lose the black bars for the most part
only if you are watching them on a HDTV monitor. For TV
shows and movies filmed in 1.78:1, you will not have any
black bars and see all of the movie area without
sacrifice. A movie filmed in 1.85:1 will give you a very
slight black bar on the top and bottom if at all. For a
2.35:1 movie, you will still get black bars on top and
bottom since the aspect ratio is larger across the
horizontal than a 16:9 screen is. I have been watching
HD-DVD's and am noticing that new aspect ratios are
cropping up. 2.20:1 and 2.40:1 are formats that allow
menus and extra content to be displayed during the
playback of a HD-DVD. A 2.40:1 ratio allows for a 2:35:1
movie to be completely visible and playing while
accessing the DVD menus in the extra space. The main
things to remember with widescreen movies is that you
see the WHOLE movie as it was in the theater, you are
experiencing the director's artistic vision and it looks
great on an HDTV monitor. For visual examples of
Aspect Ratio and the effects of Pan & Scan, Tilt & Scan
and more, visit this link. |
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