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SEMINAR ON BLU RAY DISC,[object Object]
	CONTENTS,[object Object],History,[object Object],Introduction,[object Object],Characteristics of Blu-ray disc,[object Object],Specification of Blu-ray disc,[object Object],Comparasion of storage technologies,[object Object],Applications,[object Object],Conclusion,[object Object]
HISTORY,[object Object],1st GENERATION:,[object Object],Compact disc (CD):  ---  650/700 MB,[object Object],It is with us for over 20 years.,[object Object],Wavelength of laser which reads data: 780 nm,[object Object],Color of laser: Red,[object Object],2nd GENERATION:,[object Object],Digital versatile disc (DVD): ---  4.7 GB,[object Object],It offers high quality sound and video than CD.,[object Object],Wavelength of laser which reads data: 650 nm,[object Object],Color of laser: Red,[object Object]
Contd……,[object Object],3rd GENERATION:,[object Object],Blu-ray disc (BD): ---  25/50 GB,[object Object],Next generation optical disc format.,[object Object],Wavelength of laser which reads data: 405 nm,[object Object],Color of laser: Blue-violet ,[object Object]
 INTRODUCTION,[object Object],Blu-ray (BD) is a next-generation optical disc format.,[object Object],The format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data.,[object Object],Storage capacity of BD is upto25/50 GB.,[object Object],The blu-ray name is a combination of “blue”, for the color of the laser that is used and “ray” for optical ray.,[object Object],The “e” in “blue” was purposefully left off, according to the manufacturers, an everyday word cannot be a trademark.,[object Object]
FORMAT  OF  BD,[object Object],It comes in four different formats:,[object Object],BD-ROM (read only) : for reading recorded content.,[object Object],BD-R (recordable) : for PC data storage.,[object Object],BD-RW (rewritable) : for PC data storage.,[object Object],BD-RE (rewritable) : for HDTV (high definition television) recording.,[object Object]
TYPES  OF  BD:,[object Object],SINGLE LAYER:,[object Object],It Can hold data up to 25/27 GB that means 2hrs of HD video or about 13 hrs of standard video.,[object Object],DOUBLE LAYER :,[object Object],It can hold data up to 50 GB that means 4.5 hrs of HD video or more than 20 hrs of standard video. ,[object Object]
CHARACTERISTICS OF BLU-RAY DISC,[object Object],[object Object]
Content Protection
Cost
Capacity
Robustness of disc
Compatible,[object Object]
In the rewritable versions, as re-writing is done repeatedly to one area of the disc that reduces the life of disc. ,[object Object],[object Object],[object Object],[object Object]
Principal BD Specifications,[object Object]
Comparison of CD,DVD and B D specification,[object Object],      Parameter                       CD              DVD                BD          .,[object Object],Disk diameter                    120 mm       120 mm             120 mm   ,[object Object],Disk thickness                   1.2 mm        1.2 mm              1.2 mm   ,[object Object],Laser wavelength             780 nm         650 nm             405 nm   ,[object Object],Numerical aperture           0.45             0.60                   0.85   ,[object Object],Minimum pit length    	0.83 um       0.4 um               0.138 um   ,[object Object],Data rate 	   	1.2 Mb/sec   11 Mb/sec         36 Mb/sec  ,[object Object],Number of sides                one                -----                  one or two             ,[object Object],Number of data layers        One             -----                 One or two   ,[object Object],Data capacity                 700 MB       4.7 GB (1L)     25 GB                           ,[object Object]
Blu ray disc by Achal
Blu ray disc by Achal
Blu ray disc by Achal
Blu ray disc by Achal
Blu-ray disc and CD’s /DVD’s,[object Object],   (Comparison Between Blu-ray n others),[object Object],[object Object]
1 Blu-ray = 5 to 10 DVD’s !!!!!!
Usage of a blue instead of a red laser

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