Blu ray disks 3prof2sem B.pptx
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Blu-ray disc is a next-generation optical disc format that can store high-definition video and large amounts of data using a blue-violet laser. It was developed in 2002 by a group of leading technology companies and can hold up to 50GB of data on a dual-layer disc. Blu-ray disc offers over five times the storage capacity of DVDs and uses advanced encryption to help prevent illegal copying of content. Some key applications of Blu-ray disc include high definition television recording, video distribution, and mass data storage.
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Blu ray disks 3prof2sem B.pptx
- 1. Blu-Ray Disk
- 2. CONTENTS Introduction Background of Blu-ray Disc Technology Characteristics of Blu-ray disc Comparison of storage technologies Variants Uses and Necessity
- 3. INTRODUCTION Blu-ray (BD) is 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 50GB of Data.
- 4. INTRODUCTION The name Blu-ray is derived from the blue- violet laser it uses to read and write to the disc. The “e” was intentionally left out of the name due to trademark restrictions
- 5. Background Of Blu-ray : Blu-ray disc (BD) is appropriately named after the blue laser used to write the data The first blue laser was developed in 1996 by Shuji Nakamura (Nichia Corporation) In 2002, an alliance was formed, called the Blu-ray Disc Association, including the likes of Sony, Samsung, Sharp, Hewlett-Packard, and Royal Phillips.
- 8. Media type High-density optical disc Encoding MPEG-2, H.264/MPEG-4 AVC, and VC-1 Capacity 25 GB (single layer) 50 GB (dual layer) Read mechanism 405 nm laser: 1× at 36 Mbit/s 2× at 72 Mbit/s 4× at 144 Mbit/s 6× at 216 Mbit/s 12× at 432 Mbit/s Blu-Ray Disks Specifications
- 10. Parameters BD CD BD DVD DVD Recording capacity 27GB 680Mb 54GB 4.7GB 9.4GB Number of layers single-layer Single dual-layer single-layer dual-layer Laser wavelength 405nm 780 405nm 650nm 650nm Data transfer rate 36Mbps 1.2Mbps 36Mbps 11.08Mbps 11.08Mbps Comparison With Other Media :
- 11. FORMAT OF BD : BD-ROM (read only) : for reading recorded content. television) recording. Blu-ray has two types BD-R and BD-RE with price $19.99 and $24.99 for 25GB and $47.99 and $59.99 for 50GB respectively.
- 12. Variants : 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.
- 13. ADVANTAGES : Various hard coating technologies make Bly ray disc most durable and family -friendly” Hard-coating technology provides resistance to: - Finger prints - Marks - Scratches - Dust Much more ROBUST than today’s polycarbonate-based CD/DVD’s (and HD DVD’s) . The coating was developed by TDK Corporation and is called "Durabis". It allows BDs to be cleaned safely with only a tissue. The BD drives are designed to be backward compatible, i.e. CDs and DVDs work equally well with the BD drives
- 14. Protection System HDTV contains a copyright bit that is detected by the BD recorder. If the broadcast has no copyright bit, then the BD recorder is allowed to store the information. Uses the Data Encryption Standard (DES) that has a key length of 56 bits. A Key Block and Disc ID are written into the ROM area to prevent illegal copying. BDFS (Blu-ray Disc File Structure is designed so as to avoid this problem, by using a system that uses free disc spaces with equal frequency
- 15. Enhancements Error rates increased in reading and writing after the original BD suffered scratches and fingerprints. For protection, the prototype BD was enclosed in a case. The case increased the size of the disc drive.
- 16. Disadvantages : Chances Of Disk Damage. Use Limited Because Of New Tech. i.e. USB
- 17. Blu-ray Disc Applications High definition television recording High definition video distribution High definition camcorder archiving Mass data storage Digital broadcasts
- 18. Reference : http://www.digitaljournal.com/article/254136 http://www.blu-ray.com/news/?id=1616, http://www.docstoc.com/docs/424938/White-paper- General-Blu-ray-Disc-Format http://allfreedownloadlinks.com/free-softwares/free- multimedia-software/blu-ray- to-dvd-pro-v120/ http://reviews.cnet.com/1770-9991_7-0.html?query= blu+ray+disc&searchtype=products&tag=ltcol;narrow http://en.wikipedia.org/wiki/Blu-ray_Disc# Technical_specifications http://www.thefreelibrary.com/_/search/Search.aspx? SearchBy=0&Word=blu+ray+disc&By=0
- 19. Thank You !