Company LOGO www.company.com Blu-ray Disc
Blu-ray disc by Minakshi Molawade and Shrutika Chivhe
Jan 28, 2015
BLU-RAY DISC
INTRODUCTION:-
Blu-ray, also referred to as Blu-ray Disc (BD), is the name associated with a next generation optical disc format. It has the same physical proportions as standard DVDs and Compact disks, however offers over five times the storage capacity of conventional DVDs, holding up to 27 GB of data on a single-layer disc (that's more than 2 hrs of high definition video or about thirteen hrs of standard video) and up to 50 GB on a dual-layer disc. Current developments by Pioneer have pushed the storage potential to 500GB on a solitary disc by using 20 layers.
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. The advantage of using a blue-violet laser (405 nm) is that it's got a shorter wavelength than a red laser (650 nm), which makes it feasible to focus the laser spot with even greater accuracy. This enables data to be packed more closely and stored in a reduced amount of space, so it's possible to fit more data on the disc. However, 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.
Optical drives needed to move from using red to blue lasers, critical because the wavelength of an optical drive's laser light limits the size of the pit that can be read from the disc. In other words, the blue laser's smaller wavelength, narrower beam can be more finely focused on a smaller area than that of a red laser. Using blue laser light, several times more data can be stored on a single disk of the same physical size, and also transferred at considerably faster speed.
BLU RAY TECHNOLOGY HISTORY: - WHO CREATED IT?
in the next millennium, high definition video demands a new solution. History proved that a significant 5-10 x increase in storage capacity and the ability to play previous generation formats are key elements for a new format to succeed. This new format has arrived with the advent of Blu-ray Disc, the only format that offers a considerable increase in storage capacity with its 25 to 50 GB data capacity. This allows for the next big application of optical media: the distribution and recording of high definition video in the highest possible quality.In fact, no other format can offer the data capacity of Blu-ray Disc, and no other format will allow for the same high video quality and interactive features to create the ultimate user experience. As with DVD, the Blu-ray Disc format is based on the same, bare disc physical form factor, allowing for compatibility with CD and DVD.
APPLICATION :-
- High Definition Television Recording
- High Definition Video Distribution
- High Definition Camcorder Archiving
- Mass Data Storage
- Digital Asset Management and Professional Storage.
INTRODUCTION:-
Blu-ray, also referred to as Blu-ray Disc (BD), is the name associated with a next generation optical disc format. It has the same physical proportions as standard DVDs and Compact disks, however offers over five times the storage capacity of conventional DVDs, holding up to 27 GB of data on a single-layer disc (that's more than 2 hrs of high definition video or about thirteen hrs of standard video) and up to 50 GB on a dual-layer disc. Current developments by Pioneer have pushed the storage potential to 500GB on a solitary disc by using 20 layers.
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. The advantage of using a blue-violet laser (405 nm) is that it's got a shorter wavelength than a red laser (650 nm), which makes it feasible to focus the laser spot with even greater accuracy. This enables data to be packed more closely and stored in a reduced amount of space, so it's possible to fit more data on the disc. However, 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.
Optical drives needed to move from using red to blue lasers, critical because the wavelength of an optical drive's laser light limits the size of the pit that can be read from the disc. In other words, the blue laser's smaller wavelength, narrower beam can be more finely focused on a smaller area than that of a red laser. Using blue laser light, several times more data can be stored on a single disk of the same physical size, and also transferred at considerably faster speed.
BLU RAY TECHNOLOGY HISTORY: - WHO CREATED IT?
in the next millennium, high definition video demands a new solution. History proved that a significant 5-10 x increase in storage capacity and the ability to play previous generation formats are key elements for a new format to succeed. This new format has arrived with the advent of Blu-ray Disc, the only format that offers a considerable increase in storage capacity with its 25 to 50 GB data capacity. This allows for the next big application of optical media: the distribution and recording of high definition video in the highest possible quality.In fact, no other format can offer the data capacity of Blu-ray Disc, and no other format will allow for the same high video quality and interactive features to create the ultimate user experience. As with DVD, the Blu-ray Disc format is based on the same, bare disc physical form factor, allowing for compatibility with CD and DVD.
APPLICATION :-
- High Definition Television Recording
- High Definition Video Distribution
- High Definition Camcorder Archiving
- Mass Data Storage
- Digital Asset Management and Professional Storage.
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Company LOGO
www.company.com
Blu-ray Disc
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
Company LOGO
www.company.com
Introduction
• Blu-ray, also referred 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.
Company LOGO
www.company.com
History
1st GENERATION:Compact disc (CD):- 650/700 MBIt is with us for over 20 years.Wavelength of laser which reads data:780 nmColor of laser: Red 2nd GENERATION:Digital versatile disc (DVD):- 4.7 GBIt offers high quality sound and video than CD.Wavelength of laser which reads data:650 nmColor of laser: Red
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
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.
Company LOGO
www.company.com
Format of Blu-ray disc
It comes in four different formats:It comes in four different formats:
1.1. BD-ROM (read only): for reading BD-ROM (read only): for reading recorded content.recorded content.
2.2. BD-R (recordable): for PC data BD-R (recordable): for PC data storage.storage.
3.3. BD-RW (rewritable): for PC data BD-RW (rewritable): for PC data storage.storage.
4.4. BD-RE (rewritable): for HDTV (high BD-RE (rewritable): for HDTV (high definition television) recording.definition television) recording.
Company LOGO
www.company.com
Structure
• Disc store digitally 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.
Company LOGO
www.company.com
Construction
Company LOGO
www.company.com
Types of Blu-ray Disc
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.
Company LOGO
www.company.com
Comparison between BD/DVD/CD
Company LOGO
www.company.com
Characteristics
- Lifespan- Blu-ray Disc 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.
Company LOGO
www.company.com
Characteristics
- Robustness of Disc- 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.
Company LOGO
www.company.com
Specification
Capacity 23.3 25 27GB (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
Company LOGO
www.company.com
On Guard
• Blu-ray discs 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.
Company LOGO
www.company.com
Application
- High Definition Television 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.
Company LOGO
www.company.com
Application
- High Definition Camcorder 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.
Company LOGO
www.company.com
Application
- Mass Data Storage- 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
Company LOGO
www.company.com
Future
• Current developments by Pioneer have pushed the storage potential to 500GB on a solitary disc by using 20 layers.
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
Company LOGO
www.company.com
Thank you..!
Related Documents
