Blu Ray
The textbook just can't keep up with rapidly changing technology. That's why IT students must keep current through the Internet.
As the industry has moved from CDs to DVDs, there is now a movement from DVDs to Blu Ray disks. Research the technology that sets Blu Ray apart from DVD and put your comment, along with a relevant URL and your name in this blog post.
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15 Comments:
Blu-Ray technology works along the same lines as a typical dvd or cd but uses a blue laser instead of a red laser (hence the name). The major advantage of blu-ray is that the laser is a shorter wavelength so it can focus tighter on the disc. This allows Blu-Ray discs to hold up to 25G on a single side and 50G on a dual side disc. Blu-Ray players are backward compatible and will read regular dvd’s and cd’s. They allow a higher HD viewing experience and will oneday be the standard for all movies.
http://www.blu-ray.com/info/
Lonnie
I have had the opportunity to check out the Blu-Ray disc. Although technology is moving forward with this Blu-Ray, I find the company have no concern with the consumers who insist on purchasing this equipment. It is highly overprice and you the consumer must constantly update your equipment in order to use this disc. I find some of the older generation will be lose trying to use this equipment or will go broke updating equipment. My opinion anyway.
Blu-Ray disc was first though of in 1996 and it was introduced in 2003 but available until 2006. It is the new generation of disc for recording music, video, and data. A single layer Blu-Ray holds about four and a half hours of music and video or thirdteen hours compared to only two hours of movie or four hours of music on a regular CD. Blu-Ray has a double layer that can record up to fiftyfour hours of recording.
http://electronics.howstuffworks.com/blu-ray.htm
Wilfredo Guzman
Blu-ray was formed by the Blu-Ray Disc Association and other media manufacturers. A blu-ray disc can hold up to 25GB on a single-layer disc and 50 on dual-layer discs. It is supported by over 180 of the world's leading consumer electronics and game companies. In January 2008 Warner Studios announced that they will be using blu-ray only and no longer be using any HD formats. This caused a domino effect and thus the Blu-ray HD-DVD war was over.
www.blu-ray.com/info/
Jerod Finney
While current optical disc technologies such as DVD, DVD±R, DVD±RW, and DVD-RAM rely on a red laser to read and write data, the new format uses a blue-violet laser instead, hence the name Blu-ray. Despite the different type of lasers used, Blu-ray products can easily be made backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit. The benefit of using a blue-violet laser (405nm) is that it has a shorter wavelength than a red laser (650nm), which makes it possible to focus the laser spot with even greater precision. This allows data to be packed more tightly and stored in less space, so it's possible to fit more data on the disc even though it's the same size as a CD/DVD. This together with the change of numerical aperture to 0.85 is what enables Blu-ray Discs to hold 25GB/50GB.
Blu-Ray uses a blue-violet laser as opposed to a red laser in dvd's to increase the storage space of a disc because the blue-violet laser is a shorter frequency (405nm) and the red laser is of a greater frequency (650nm). A single layer blu-ray can hold 25GB and a dual layer can hold 50GB. This is almost 6 times the amount held on a dual layer dvd. This disc is used for data storage and high definition movies because more space is needed to produce a high definition image.
-Steven Walker
http://en.wikipedia.org/wiki/Blu-ray_Disc
There are three formats being developed for Blu-Ray technology. The BD-ROM or Blu-Ray read-only disc format will be used to store movies, computer games and software. The Blu-Ray recordable or BD-R will provide users the opportunity to store larger amounts of data and HDTV recordings in one disc. The BD-RE or Blu-Ray rewritable disc format will provide users the ability to change the disc's contents.
The main advantage of Blu-Ray technology is its capability of storing massive amounts of data in one disc. Blu-Ray technology will enable users to store an average of 25GB-27GB worth of data into just one layer. This is equivalent to 4 hours worth of HD video and audio. Moreover, Blu-Ray dual layer discs will have a storage capacity of up to 54GB. Research on Blu-Ray discs with up to four layers and with storage capacities of up to 200 GB is currently underway.
http://www.tech-faq.com/blu-ray.shtml
Daniel
Some Differences between Blu ray technology and that of typical CDs and DVDs are
-Blue ray technology uses a blue laser to read information insted of red as does the typical CD or DVD. The blue ray is able to focus more on the higher density pits on the disc.
-Another major difference between blu ray technology and the typical CD and DVD are the tracks on the disc. Blu ray has a tighter track pitch which allows it to have more pits. More pits equals more information.
-One last difference is the surface layer. The typical CD or DVD has a 0.6 mm plastic surface layer while the blu ray discs have a thinner surface layer of 0.1mm.
I also believe Blu-Ray will replace DVDs and and CDs that we use now. But the HD-DVDs is coming in close with the blu ray disc.
-David Del Castillo
Sources:
http://www.engadget.com/2005/09/19/blu-ray-vs-hd-dvd-state-of-the-s-union-s-division/
http://www.blu-raydisc.com/Section-14064/faqs/3/Index.html
Blu-Ray, or BD, is a new optical disc format which uses a 405 nm blue laser (hence the name) instead of a 650 nm red one, allowing better focusing (because of the shorter wavelength) and therefore more compact information storage.
Because of this, a BD the same size as a CD or DVD can hold 25 GB (single –layer) or 50 GB (dual-layer) per disc.
The format was developed by the Blu-ray Disc Association (BDA), a consortium of the world’s leading consumer electronics manufactures including Apple , Sony, and all the usual suspects.
BD is being used by more than 180 manufacturers for computer storage, games, music, movies, and other storage needs.
The format has become extremely popular because of its massive storage, especially with movie studios, and according to Blu-ray.com, “…six of [the eight major movie studios] (Disney, Fox, Sony, Warner, Lionsgate and MGM) are releasing their movies exclusively in the Blu-ray format.”
Fortunately, boxes can be built which play CDs and DVDs so people’s collections are not made obsolete. Guess something was learned from 8-tracks.
“Blu-ray Disc”, www.blu-ray.com/info/, retrieved 08/03/05
Joyce
Blu ray technology besides for the obvious blue laser used to write information, has madatory hard coating which make the disks more scratch resistant than the traditional dvd/cd/hd dvd.
http://67.79.90.147:2196/ehost/pdf?vid=7&hid=113&sid=a26fdcbb-9433-420c-849f-d23188b0761c%40sessionmgr103
PC Magazine; Jan2008, Vol. 27 Issue 1/2, p136-136, 1p, 1c
Daniel Brooks
Blu-ray as the name states comes from the fact that it uses a blue-violet laser rather than a red laser like DVD's and CD's. Using the blue-violet laser, it has a shorter wave length which makes it possible to fit more data on the disc.
C. Martin
Blu-ray as the name states comes from the fact that it uses a blue-violet laser rather than a red laser like DVD's and CD's. Using the blue-violet laser, it has a shorter wave length which makes it possible to fit more data on the disc.
http://www.blu-ray.com/info/
C. Martin
The primary difference between the Blu-Ray technology is hidden, not so subtly in it's tile. Unlike CDs DVDs and whatever other disk types there are, which use a red laser to read and write, the Blu-Ray uses a blue laser. The advantage there being that blue lasers have a much shorter wavelength. This means that the laser is able to hit a much smaller area of the disk, thus saving huge amounts of space. In fact, according to the official website, a double-sided disk can hold up to 50GB. I've no clue how I would fill up that much space.
Thomas Kelley
http://www.blu-ray.com/info/
Blu ray is a optical disc storage media format disk that mainly serves for high def videos and data storage. they can store up to 50 gigs of material.
http://en.wikipedia.org/wiki/Blu_Ray
Jessie
Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format. The format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. The format offers more than five times the storage capacity of traditional DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc.
Source: http://www.blu-ray.com/faq/#bluray
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