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What is HD DVD?
By David Stone
HD DVD stands for High Definition Digital Versatile Disc. It is a
round and thin disc that looks almost exactly like a CD or DVD. It is
actually very similar to CDs and DVDs in all aspects except one.
The difference is that a HD DVD can hold much more information
than the CD/DVDs of the past. The way they packed more
information into the same space mainly comes from the color of the
laser that is used to read the disc. HD DVDs are read by a blue-
violet laser beam instead of the traditional red beam. The blue-
violet color has a shorter wavelength that makes it capable of
focusing on a smaller more precise area. That way you can just
stuff all of the information closer together on the same size disc.
How much more information? An HD DVD holds about 3 times more
information than a DVD. With this extra space you can fit HD
quality movies and sound. Specifically a 720p/1080i resolution
picture vs. a 480i movie on a DVD. A disc can hold any other type
of information besides movies, but video is the most popular use
for a DVD world wide. This is why many companies are competing
to release home theater HD DVD players. Paramount Pictures,
Warner Bros. and Universal Studios have already released lists of
titles that will be available on HD DVD. Toshiba has already
announced two players that it will manufacture. HD DVD is in direct
competition with Blu-Ray, which implements a similar technology
that is not compatible. Blu-Ray was developed by Sony and is
backed by the Blu-Ray Association including Apple, Hitachi, Dell, HP,
LG, JVC, Panasonic, Mitsubishi, Pioneer, Phillips, Samsung, Sharp,
TDK, Thomson and Sony. Both technologies have similar launch
dates and offer similar features.
HD DVD players will utilize a new kind of cable called HDMI for
transmitting digital picture and sound. This cable has multiple
wires for both video and audio that ensures the clearest quality.
The use of one wire for both video and audio creates less clutter
than previous technology. The players will also feature s-video
and component connections to offer a wide range of usage
capabilities.
About the Author
Get the best and latest information about HD DVD technology at http://www.find-hddvd-blu-ray-information.info
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