Text of Blu-ray and HD DVD Technologies Corey Collins Mark Merrill
Blu-ray and HD DVD Technologies Corey Collins Mark Merrill
Main Topics Current Media Format Theory of Blu-ray Technology
Integration of Blu-ray Theory of HD DVD Technology Integration of
HD DVD Comparison - Which is better? Which one is more likely to
Current Media Format CDs Consist of pits and lands stamped out
in a spiral pattern on the disc. A laser then reads the pits and
lands. The change from a pit to a land or a land to a pit indicates
a one while no change indicates a zero.
Current Media Format Cont. CD-RWs Consist of a metal phase
change alloy which when heated can be to change to reflectivity
CD-Rs Consist of a dye that is applied to the disc. When a writing
laser is shined it changes the reflectivity.
Current Media Format Cont. DVDs Also contain pits and lands.
Are more highly compact than a CD. Special laser is needed to read
High Definition To better understand the need for media formats
with greater storage lets briefly describe what High Definition is.
Your regular TV signal has about 480 pixel lines, but HD has about
1280 pixel lines that go across your TV Because of this difference
the bandwidth of HD is about 5 times greater than standard video.
Currently a standard movie takes up almost an entire DVD so we need
something thats almost 5 times that. Enter Blu-ray and HD DVD
Blu-ray Technology Name Derived from the blue- violet laser
used to read and write data. Developed by the Blu- ray Disc
Association with more than 180 members. Dell Sony LG
Blu-ray Technology Cont. Data capacity Because Blu-ray uses a
blue laser(405 nanometers) instead of a red laser(650 nanometers)
this allows the data tracks on the disc to be very compact. This
allows for more than twice as small pits as on a DVD.
Blu-ray Technology Cont. Data Capacity Cont. Because of the
greatly compact data Blu-ray can hold almost 5 times more data than
a single layer DVD. Close to 25 GB! Just like a DVD Blu-ray can
also be recorded in Dual- Layer format. This allows the disk to
hold up to 50 GB!! Because the polycarbonate layer of the Blu-ray
disc is so much larger than a DVD because the recording layer is so
much smaller it can have even more than two layers.
Blu-ray Technology Cont. Writing Data Blu-ray uses a
combination of two lenses to greatly shrink the laser to read the
data. This also allows for higher data rate transfer close to 36
mbps. It could record 25 GB of data in an hour an a half.
Blu-ray Technology Cont. BD-ROM (read-only) - for pre-recorded
content BD-R (recordable) - for PC data storage BD-RW (rewritable)
- for PC data storage BD-RE (rewritable) - for HDTV recording
Blu-ray Integration Blu-ray discs are able to record HD without
any signal loss. Single layer up to 2 hours of HD video Dual layer
up to 4.5 hours of HD video
Blu-ray Integration Cont. Security Blu-ray discs are better
armed than current DVDs. They come equipped with a secure
encryption system -- a unique ID that protects against video piracy
and copyright infringement.
HD DVD Technology Name Obviously comes from the term High
Definition Developed by Toshiba and NEC
HD DVD Technology Cont. Data Capacity HD DVD uses close to the
same blue laser that the Blu-ray disc does. It is also 405
nanometers wide. Thus allows for data to be greatly
HD DVD Technology Cont. Data Capacity Cont. Single Layer Disc
15 GB Dual Layer Disc 30 GB
HD DVD Technology Cont. HD DVD (read-only) - for pre-recorded
content HD DVD-R (recordable) - for PC data storage HD DVD-RAM
(rewritable) - for HDTV recording Formats
HD DVD Integration Compatibility Because a lot of home-users
dont yet have a high definition Television the makers of the HD DVD
disc made it backwards compatible by using the twin format
HD DVD Integration Cont. Compatibility Cont. But what about
dual layer?? In order to accommodate for the needs of the storage
capacity of the dual layer format the makers designed the
HD DVD Integration Cont. Security Uses the same security
feature as Blu-ray. Both Blu-ray and HD DVD makers said would be
extremely hard to pirate with this security feature. Eight days
after HD DVD discs hit the market a hacker called muslix64
reportedly cracked the security feature.
HD DVD vs Blu-ray Both formats use blue lasers rather than red.
Both have the same options for video and audio compression. Blu-ray
offers significantly more storage space -- 50 GB on a dual-layer
disc versus HD-DVD's 30 GB. The DVD Forum, which creates DVD
standards, has approved HD-DVD and has not approved Blu-ray. HD-DVD
is less expensive than Blu-ray. HD-DVDs can be produced on existing
equipment, and Blu-ray discs can't. HD-DVD players are selling for
$499 (Toshiba HD-A1) to $799 (HD-XA1), and Blu-ray players are
selling for around $1,000 (Samsung DB-P1000). HD-DVD players hit
the market on April 18, 2006, two months before the first Blu-ray
player hit the U.S. market in June, 2006.
HD DVD vs Blu-ray Cont. Blu-Ray sample taken from 7 sources on
Amazon.com, highest was $26.95, lowest was $19.95 HD DVD sample
taken from 7sources on Amazon.com, highest was $27.95, lowest was
HD DVD vs Blu-ray Cont. Current supporters of HD-DVD include
Toshiba, NEC, Sanyo, and Microsoft, in addition to New Line Cinema,
Paramount, Universal, Time-Warner, and the official approval of the
DVD Forum. Current supporters for Blu-Ray includes PC makers Apple,
Dell, Hewlett-Packard, and Sony, and electronics giants Hitachi,
LG, Mitsubishi Electric, Matsushita/Panasonic, Pioneer, Philips,
Samsung, Sharp, TDK, and Thomson. Add to this the support by movie
studios such as Columbia TriStar, Sony Pictures and MGM (all three
owned by Sony), 20th Century Fox, Lions Gate Entertainment, and
Disney, as well as video game makers Electronic Arts and Vivendi
Universal Games, and the bastion of support for Blu-Ray looks
WAR!! In summary it is hard to tell which media format will win
this format war. It all depends on which format consumers can get
more cheaply, more quickly, with more movies available for it.
Blu-Ray is technologically superior However, the VHS and Betamax
war shows that the technologically superior product does not always