2. INTRODUCTION
• BLU-RAY (BD) IS A NEW OPTICAL DISK STORAGE STANDARD OR
DIGITAL OPTICAL DISK DATA STORAGE FORMAT DESIGNED TO
SUPPRESS THE DIGITAL VERSATILE DISK (DVD) FORMAT.
• THE NAME BLU-RAY REFERS TO THE BLUE LASER USED TO READ THE
DISK.
• LARGE RECORDING CAPACITY UP TO 27 GB & HIGH SPEED DATA
TRANSFER RATE 36 MBPS.
• IT IS CAPABLE OF STORING HIGH-DEFINITION VIDEO RESOLUTION
(1080P).
• THE PLASTIC DISK IS 120 M IN DIAMETER & 1.2 MM THICK, THE SAME
SIZE AS DVDS & CDS.
• CONVENTIONAL BLU-RAY DISK CONTAINS 25 GB PER LAYER, WITH
DUAL LAYER DISK (50GB).
3. BLU-RAY DISK TYPES
Replicated disc (BD) Single layer – 25 GB
Dual layer - 50 GB
Recordable disk type BD-R (Recordable) – Single & dual layer
BD-RE (Recordable-Erasable) – Single & dual
layer
BD9/BD5 Dual (8.5 GB) & single (4.7 GB) format on
DVD - + R disc.
Mini Blu-ray 8cm with 7.5 GB capacity
AVCREC Recordable Blu-ray compatible content to
DVD - + R (Camcorder)
4. BLU-RAY DISK FORMAT
• BD-ROM – READ-ONLY FORMAT FOR DISTRIBUTION OF
HD MOVIES, GAMES, SOFTWARE, ETC.
• BD-R – RECORDABLE FORMAT FOR HD VIDEO
RECORDING AND PC DATA STORAGE.
• BD-RE – REWRITABLE FORMAT FOE HD RECORDING AND
PC DATA STORAGE.
6. ADVANTAGES OF BLU-RAY DISK
• LIFE SPAN.
• LARGE RECORDING CAPACITY.
• HIGH SPEED.
• RESISTANCE TO SCRATCHES & FINGER PRINTS.
• SAFETY & SECURITY.
• EASE OF USE.
• COMPATIBILITY.
7. DISADVANTAGES
• VERY EXPENSIVE TECHNOLOGY.
• HIGH DEFINITION CAPACITY IS NOT SUBSTANTIAL
AMOUNT EVEN THOUGH SPACE IS GREAT.
• DUE TO INCREASING POPULARITY OF HIGH DEFINITIONS
DVD PLAYERS, BLU-RAY MAY BE NULLIFIED BECAUSE
CONSUMERS WILL SETTLE FOR THE LESS EXPENSIVE
COMPETITOR.
• NOT ONLY IN THE TECHNOLOGY EXPENSIVE BUT BLU-
RAY DISKS HAVE A HIGHER PRICE TAG AS WELL.
8. BLU-RAY DISK VS DVD
PARAMETERS BD-ROM DVD-ROM
STORAGE CAPACITY
(SINGLE LAYER)
25GB 4.7 GB
STORAGE CAPACITY
(DUAL LAYER)
50GB 7.4GB
LAZER
WAVELENGHTH
405nm 650nm
NUMERICAL
APERTURE (NA)
0.85 0.60
PROTECTION LAYER 0.1mm 0.6mm
9.
10. APPLICATION
• HIGH DEFINITION TELEVISION RECORDING.
• HIGH DEFINITION VIDEO DISTRIBUTION.
• HIGH DEFINITION CAMCORDER ARCHIVING.
• MASS DATA STORAGE.
• DIGITAL ASSET MANAGEMENT & PROFESSIONAL
STORAGE.
11. FUTURE SCOPE
• BLU-RAY DISC IS THE ONLY STORAGE DEVICE WHICH
CAN STORE AND READ HD CONTENT. HENCE, BLU-RAY
DISC PROMISES A BRIGHT FUTURE AND IS GOING MOST
USED DATA STORAGE MEDIA.
• INCREASING THE DATA STORAGE CAPACITY OF BLU-RAY
DISCS ALSO HELPS THE USABILITY OF BLU-RAY DISC.
• BLU-RAY DISC MAY BRING A REVOLUTION IN THE
PORTABLE STORAGE DEVICES FIELD.
12. CONCLUSION
BOTH BD & DVD WOULD MOST LIKELY CO-EXIST FOR
QUITE SOME TIME UNTIL HDTVS BECOMES MORE
WIDESPREAD.
