Presented by: Saroj Maharjan BSc.IT 5 th Semester CPS, LBEF Campus

What is Blu-ray? Blu-ray is the name of a next-generation optical disc. CD’s, DVD’s, and Blu-ray are all disc’s the same size. However each of these discs can hold more data, audio and video than the previous … Why is this?  Blu-ray Disc (BD), sometimes called "Blu-ray", is an optical disc storage medium designed to supersede the standard DVD format. Its main uses are for storing high-definition video, PlayStation 3 video games, and other data, with up to 25 GB per single layered, and 50 GB per dual layered disc. The disc has the same physical dimensions as standard DVDs and CDs.  The name Blu-ray Disc derives from the blue-violet laser used to read the disc. While a standard DVD uses a 650 nanometer red laser, Blu-ray uses a shorter wavelength, a 405 nm blue-violet laser, and allows for almost six times more data storage than a DVD.Abstract: Why do we need Blu-ray? How do you read an Optical Disk? Differences CD/DVD/Blu-ray History of Blu-ray Blu-ray versus HD-DVD Applications of Blu-ray Advantages Conclusion

In 1998 HDTV’s were appearing in the consumer market, However there was only standard-definition movies available. There was no media format that could store the large amounts of data need to create HD movies. Due to growing archive and backup requirements, broadband content distribution, and expanding hard drive capacities, existing optical technologies are lagging in capacity and performance. The Blu-ray format was developed to enable recording, rewriting and playback of high-definition video, as well as storing large amounts of data. Blu-ray disks offer more than five times the storage of a regular DVD. Why do we need Blu-ray?

How do you read an Optical Disk? The digitally encoded audio and video information on a disc is stored in pits, which are spiral grooves that run outward from the center of the disc. A laser reads the pits, and plays the audio and video. Blu-ray uses a blue-violet laser to read and write data, while DVDs use a red laser and CDs use an Infrared laser. The blue laser has a shorter beam (405 nanometers) than a red laser (650 nanometers); this allows the blue laser to focus at a higher precision. To have more data on a disc, the pits must be smaller and closer packed together. The smaller and closer the pits, the more precise the laser that reads the pits must focus.

History of Blu-ray  Shuji Nakamura, a professor at the University of California, Santa Barbara, invented practical blue laser diodes.  Using blue laser diodes Sony teamed up with Pioneer started to develop technologies to allow more data to be stored on a disk.  In October of 2000 the first prototypes were unveiled at the Combined Exhibition of Advanced Technologies trade show.

History of Blu-ray  In February 2002 the project was officially announced as Blu-ray and the Blu-ray Disc Association was founded by Sony, Matsushita, Pioneer, Philips, Thomson, LG Electronics, Hitachi, Sharp, and Samsung.  The Blu-ray Disc physical specifications were finished in  Early 2006 the BD-ROM specifications were finalized and a secure Digital rights management platform was agreed upon.  June 2006 Blu-ray players where released into the market.  June 2006 Blu-ray movies where released into the market.

Blu-ray Vs. HD DVD Twenty years ago a similar battle was waged. – VHS vs. Betamax Sony Corp. runs with the more advanced Betamax but is driven out of the market by the more popular VHS. – Infuriated by the defeat Sony’s CEO vows, “This will never happen to Sony Again!” Recently, Sony again opts for the superior technology in Blu-ray.

Blu-ray Vs. HD DVD  Blu-ray’s players Samsung Pioneer Sony (Playstation 3)  HD DVD’s players Toshiba Intel Microsoft (Xbox 360)

Blu-ray Vs. HD DVD Blu-ray's strategy to gain the support of many Hollywood studios works, solidifying its position as successor to the outdated DVD. – January 2008, Warner Bros commits to Blu- ray. – As a direct result, Toshiba decides to stop producing HD DVDs.

Applications of Blu-ray List of products available with Blu-ray Players /recorders Computer entertainment systems Film and TV Video Games Playstation 3 Hardware for computers Hardware - BD drives Blank Media Camcorders Home theater Printers

Data Storage/ Backup  Business are investing in ways to increase backup and data storage to enable them to store vast amounts of data.  The increase in storage is due to the legal requirements that business have in regards to archiving and keeping business records.  The need for more storage is also due to the increase of “paperless” business.  The Blu-ray Disc has 5-10 times more storage space than the DVD, which has 5 times more space than the CD.

Data Storage/ Backup TDK ○ They develop BD-R (write once) and BD-RE (rewritable) in 25 GB and 50 GB. ○ High precision Spin Coating This technology enables the manufacturer to create a smooth and precise cover layer. Having a smooth layer is important in regards to the smaller bandwidth of the blue-violet laser. ○ DURABIS2 This technology increases the scratch resistance by 100 times a normal disc. It also resists an accumulation of dust. Scratches and dust can make a BD unreadable. ○ TDK’s special recording layer technology Higher speeds of 72Mbps (2x) There are multiple recording layers possible for more storage. TDK has prototypes for 100GB and 200GB Blu-ray Disc.

Computers  Some of the largest computer manufacturers are planning to or already have Blu-ray drives.  The BD Drives for the computer enable the writable, rewritable, and playback features for the Blu-ray Disc.  Panasonic developed the first slim BD drive. Included reverse compatibility Utilizes 3 different wavelengths: ○ Infrared (780 nm) for CD ○ Red (650 nm) for DVD ○ Blue-violet (405 nm) for BD

Java Technology support  “Java is used to implement interactive menus on Blu-ray discs.” (Blu-ray Disc)  Java Virtual Machines “will allow updates to Blu-ray Discs via the internet, adding content such as additional subtitle languages and promotional features that are not included on the disc at pressing time.” (Blu-ray Disc) Hard Coating  Sony sprays its discs with both scratch-resistant and anti- static coating.  Verbatim’s discs are sprayed with ScratchGuard. Data Storage (25-50 Gb) Copying Speed (4.5 MB/s-54 MB/s) Advantages of Blu-ray

Disadvantages of Blu-ray  Cost The average Blu-ray player costs around NRs. 2500, Movie Rs.1900, PS3 Rs and PS3 Games Rs Initially, the Blu-ray discs will be more costly to produce than HD or the standard DVD media  Developing Technology  Threat of Substitutes Blu-ray uses hardware which may be replaced with flash memory On Demand and Online movie rental sites may put the physical disc to rest

Conclusion  Blu-ray is a digital media format for optical disks that uses blue laser diode due to its narrow focus point.  Blu-ray has become the industry’s new preferred format over HD DVD.  Businesses will be able to use Blu-ray drives in computers and laptops for more data storage and backup.  Advantages of Blu-ray Java Software Support allows users to have access to menus that are not preset. The hard-coating of Blu-ray will keep the discs from finger prints, marks, scratches, dust prolonging the useful life of the disc (50 yrs). The copying rate and data storage can hold up to double the storage rate of a HD DVD, plus the copying rate of both single and double layer discs are extremely fast. The Future is Blu-ray.

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