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Bluray disc-ppt-by-raman sanoria

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  • 1. BLU-RAY DISC By : raman sanoria

2. Blu_Ray DisksINDEX Introduction History & Evolution Features Working Implementation Future & Commercial Market Conclusion ReferencesISE, SCE2 3. INTRODUCTIONBluraydisc(BD)isappropriatelynamedafterthebluelaserusedto writethedataA Blu-ray Disc (also known as BD or Blu-Ray) is an optical disc storage medium designed to supersede the standard DVD format.The disc has the same physical dimensions as standard DVDs and CDsTakes up about five times more bandwidth and therefore requires a disc with about five times more storage.Blu-ray is the next-generation digital video disc. It can record, store and play back high-definition video and digital audio, as well as computer data. The advantage to Blu-ray is the sheer amount of information it can hold.ISE, SCE33 4. INTRODUCTION(contd) A single-layer Blu-ray disc, which is roughly thesame size as a DVD, can hold up to 25GB of data --thats more than two hours of high-definition video orabout 13 hours of standard video. A double-layer Blu-ray disc can store up to 50 GB,enough to hold about 4.5 hours of high-definitionvideo or more than 20 hours of standard video. Users will be able to connect to the Internet andinstantly download subtitles and other interactivemovie features. 4 5. HISTORY1st 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 6. 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 reads data: 405 nm-Color of laser: Blue-violet which was developed by SHUJI NAKAMURA at NICHIA CORPORATION 7. FEATURES Record high-definition television (HDTV) without any quality loss Instantly skip to any spot on the disk Record one program while watching another on the disc Create playlists Edit or reorder programs recorded on the disc Automatically search for an empty space on the disc to avoid recording over a program Access the Web to download subtitles and other extra featuresISE, SCE77 8. WorkingDiscs store digitally encoded video and audio information in pits -- spiral groovesthat run from the center of the disc to its edges. A laser reads the other side of these pits -- the bumps -- to play the movie orprogram that is stored on the DVD.The more data that is contained on a disc, the smaller and more closely packed thepits must be. The smaller the pits , the more precise the reading laser must be.Unlike current DVDs, Blu-ray uses a blue laser . A blue laser has a shorterwavelength (405 nanometers) than a red laser (650 nanometers).The smaller beam focuses more precisely, enabling it to read information recordedin pits that are only 0.15 microns (m) this is more than twice as small as the pitson a DVD.Blu-ray has reduced the track pitch from 0.74 microns to 0.32 microns. Thesmaller pits, smaller beam and shorter track pitch together enable a single-layerBlu-ray disc to hold more than 25 GB of informationISE, SCE 8 8 9. THE TECHNOLOGYPits : spiral grooves that run from the centre of the disc to its edgesBumps : other sides of these edges.Track pitch : it is the distance between the two tracks (of pits) on the surface.-----------------------------Disc store digitally encoded data in PITS.9 10. FORMAT OF BDIt comes in four different formats: BD-ROM (read only) : for reading recordedcontent. BD-R (recordable) : for PC data storage. BD-RW (rewritable) : for PC data storage. BD-RE (rewritable) : for HDTV (highdefinition television) recording. 11. TYPES OF BD: SINGLE LAYER :- Can hold data up to 25/27 GB that means2 hrs of HD video or about 13 hrs ofstandard video. DOUBLE LAYER :- Can hold data up to 50 GB that means 4.5hrs of HD video or more than 20 hrs ofstandard video. 12. THE TECHNOLOGYPits : spiral grooves that run from the centre of the disc to its edgesBumps : other sides of these edges.Track pitch : it is the distance between the two tracks (of pits) on the surface.--------------------------------Disc store digitally encoded data in PITS.-------------------------------- 13. THE TECHNOLOGYSo, in blu-ray disc:Pit size 0.15 microns ( more than twice as small as the pits on DVD )Track-pitch is : 0.32 micronsLaser needed : blue-violet laser (405 nm)Data transfer rate : 36 Mbps 14. COMPARISON IN BUILDING BD AND DVD BD DVD Data is placed on top of a Data is sandwiched b/w1.1 mm thick two polycarbonate layers,polycarbonate layereach 0.6 mm thick Doesnt suffer from Suffer fromBIREFRINGENCEBIREFRINGENCE Doesnt suffer from DISC Suffer from DISC TILTTILT Hard coating is placed No such hard coating isoutside to protect fromplacedscratches or fingerprints 15. BLU RAY S DURABILITY ADVANTAGE Various hard coating technologies make Bly raydisc most durable and family -friendly Hard-coating technology provides resistance to:- Finger prints- Marks- Scratches- Dust Much more ROBUST than todayspolycarbonate-based CD/DVDs (and HD DVDs) 16. FEATURES OF BDWith BD we can: Record HDTV without any quality loss Instantly skip to any spot on disc Record one program while watching other on thedisc Create playlists Edit or reorder programs recorded on disc Automatically search for an empty space on thedisc to avoid recording over a program Access to web to download subtitles and otherextra features And many more 17. BLY-RAYS DENSITY ADVANTAGE Higher density enables better data seek times Shorter to travel for same amount of data results in faster data seek Better for random access of data 18. THE NAMEThe blu-ray name is a combination of blue, for the color of the laser that is used and ray for optical ray.The e in blue was purposefully left off, according to the manufacturers, because an everyday word cannot be a trademark. 19. On GAURD Blu-ray discs are better armed thancurrent DVDs. They come equippedwith a secure encryption system aunique ID that protects against videopiracy and copyright infringement. 20. DO MORE WITH BLU More capacity, Density andPerformance More Industry Support/ConsumerReach (BDA has 140+ members) More Durable More Interactive User Experience More Flexible Content Protection:AAC, BD+ Renewability Technologyand ROM Mark 21. Thank You