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Blu-ray Disc
The document discusses blu-ray discs, a next generation optical disc format that utilizes a blue-violet laser to enable high-definition video recording and data storage. It covers the history, formats, structure, characteristics, and applications of blu-ray technology, highlighting its advantages over DVDs and CDs in terms of capacity and durability. Additionally, it mentions future developments aiming to increase storage capacity to 500 GB using multilayer discs.
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Blu-ray Disc
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- 2. Company LOGO www.company.com Contents • Introduction • History •The Name • Format of Blu-ray disc • Structure • Types of Blu-ray Disc • Comparison between BD/DVD/CD • Characteristics • Specification • On Guard • Application • Future • Conclusion • Bibliography
- 3. Company LOGO www.company.com Introduction • Blu-ray, alsoreferred to as Blu-ray Disc (BD), is the name associated with 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. • Although present optical disc technologies such as DVD make use of a red laser to read and write data, the Blu- ray format uses a blue-violet laser in its place.
- 4. Company LOGO www.company.com History 1st GENERATION: Compact disc(CD):- 650/700 MB It is with us for over 20 years. Wavelength of laser which reads data:780 nm Color of laser: Red 2nd GENERATION: Digital versatile disc (DVD):- 4.7 GB It offers high quality sound and video than CD. Wavelength of laser which reads data:650 nm Color of laser: Red
- 5. Company LOGO www.company.com History 3rd GENERATION: Blu-ray disc(BD):-25/50 GB -Next generation optical disc format. -Developed by blu-ray disc association (which includes Apple, Hitachi, HP, LG, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony) -Wavelength of laser which read data:405 nm -Color of laser: Blue-violet which was developed by SHUJI NAKAMURA
- 6. Company LOGO www.company.com First Thing’s First– Why The Name? • The blu-ray name is the combination of “blue”, for color of the laser that is used and “ray” for the optical ray. • The “e” in “blue” was purposefully left off, according to the manufacturers, because an everyday word cannot be a trademark.
- 7. Company LOGO www.company.com Format of Blu-ray disc Itcomes in four different formats:It comes in four different formats: 1.1. BD-ROM (read only): for readingBD-ROM (read only): for reading recorded content.recorded content. 2.2. BD-R (recordable): for PC dataBD-R (recordable): for PC data storage.storage. 3.3. BD-RW (rewritable): for PC dataBD-RW (rewritable): for PC data storage.storage. 4.4. BD-RE (rewritable): for HDTV (highBD-RE (rewritable): for HDTV (high definition television) recording.definition television) recording.
- 8. Company LOGO www.company.com Structure • Disc storedigitally encoded data in PITS. • Pits: spiral groves that runs from the center of the disc to its edge. • Track pitch: it is the distance between the two tracks (of pits) on the surface.
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- 10. Company LOGO www.company.com Types of Blu-rayDisc SINGLE LAYER : Can hold data up to 25/27 GB that means 2 hrs of HD video or about 13 hrs of standard video. DOUBLE LAYER : - Can hold data up to 50 GB that means 4.5 hrs of HD video or more than 20 hrs of standard video.
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- 12. Company LOGO www.company.com Characteristics - Lifespan - Blu-rayDisc format is designed to stay relevant for at least 10 to 15 years. - Cost - Blu-ray Disc production costs are within 10% of DVD production costs, although a Blu-ray Disc offers 5-10 x the capacity. - Capacity - The Blu-ray Disc format offers the highest capacity of any consumer media format to date.
- 13. Company LOGO www.company.com Characteristics - Robustness ofDisc - The discs offer much stronger resistance to scratches and fingerprints than other existing and proposed formats. - Compatible - The BD drives are designed to be backward compatible, i.e. CDs and DVDs work equally well with the BD drives.
- 14. Company LOGO www.company.com Specification Capacity 23.3 2527GB (single layer) Wave length of the laser 405nm Numerical Aperture of the objective lens 0.85 Data transfer rate 36Mbps Thickness of the disc 1.2mm Diameter of the center hole 15mm Recording method Phase change Data track Groove recording Visual data MPEG-2 video
- 15. Company LOGO www.company.com On Guard • Blu-raydiscs are better armed than current DVD’s. They come equipped with a secure encryption system – a unique ID that protected against video piracy and copyright infringement. • Disc is mandatory and will be governed by strict licensing procedures.
- 16. Company LOGO www.company.com Application - High DefinitionTelevision Recording - High Definition broadcasting is vastly expanding in the U.S. and Asia. - High Definition Video Distribution - Due to its enormous data capacity of 25 to 50 GB per (single-sided) disc, the Blu-ray Disc format can store High Definition video in the highest possible quality.
- 17. Company LOGO www.company.com Application - High DefinitionCamcorder Archiving - As the market penetration of High Definition TV sets continues to grow, so does the demand of consumers to create their own HD recordings.
- 18. Company LOGO www.company.com Application - Mass DataStorage - The Blu-ray Disc format again offers 5- 10 x as much capacity as traditional DVD resulting in 25 to 50 GB of data to be stored on a single rewritable or recordable disc. - Digital Asset Management and Professional Storage - Due to its high capacity, low cost per GB and extremely versatile ways of transferring data from one device to another
- 19. Company LOGO www.company.com Future • Current developmentsby Pioneer have pushed the storage potential to 500GB on a solitary disc by using 20 layers.
- 20. Company LOGO www.company.com Bibliography • www.digitaljournal.com • www.blu-ray.com •www.docstoc.com • allfreedownloadlinks.com • reviews.cnet.com • en.wikipedia.org • www.thefreelibrary.com
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