Embed Size (px)
DESCRIPTION
Blu-ray technology and a brief preview of it's features.
Citation preview
WELCOME
Bharati Vidyapeeth’s Jawaharlal Nehru institute
of technology,Pune TOPIC
BLU-RAY TECHNOLOGYBY-
Arshiya Sayyed
A quick recap!Compact disc(CD)-650/700 MB
Specialty-We’ve been using it for over 20 years
Wavelength of laser-780nmColor of laser-RED
Blu-ray(bd)-25/50GBSpecialty-Can store huge
data in small spaceColor of laser -blue
Digital versatile disc(DVD)Specialty-it offers high
quality sound and videoWavelength of laser-
650nmColor of laser-red
A trademark for the "Blue Disc" logo was filed February 9, 2001.
2.The disc was named Blu-ray due to the use of blue-ray in it and the letter ‘e’ was dropped off because they could not take such a commonly used word as a trade-mark.
Blu-ray Disc (official abbreviation BD) is an optical disc storage medium designed to supersede the DVD format. The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs
BD was developed by Blue-ray disc association and now being manufactured by iApple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson
Introduction-
•Blu-ray was developed by BDA, a group representing makers of consumer electronics, computer hardware, and motion pictures•It uses blue-violet laser developed by Shuji Nakamura at Nichia corporation
DEVELOPMENT
Mr.Shuji Nakamura
Format of BDIt comes in four different types1. BD-ROM(read only)-for reading the
recorded content2. BD-R(recordable)- for pc data storage3. BD-RW-for pc data storage in writable
form4. BD-RE(rewritable)-for HDTV recording
FORMAT
The format offers more than five times the storage capacity of traditional DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc. This extra capacity combined with the use of advanced video and audio codes will offer consumers an unprecedented HD experience.
Single layer Double layer
COMPARISON BETWEEN SINGLE LAYER AND DOUBLE LAYER
SINGLE LAYER
DOUBLE LAYER
A single-layer Blu-ray disc can hold 25GB of data, a dramatic improvement over DVD's 4.7GB.
A double-layer Blu-ray disc can hold 50 GB
This is enough for approximately 2.5 hours of high-definition video or 13 hours of standard-definition video.
This is enough for approximately 4.5 hours of high-definition video or 20 hours of standard-definition video.
Pits: Spiral grooves that run from the centre of the disc to the edges
Bumps-other sides of these edges(0.15 MICRONS)
Track pitch-Distance between the two tracks of the pits on surface(O.32
MICRONS)
Mode of storage-disc stores digitally encoded data in PITS
Pits contain bumps.Data is recorded within the layer provided within the Blu-ray Disc (BD)Discs store digitally encoded video and audio information in pits -- spiral grooves that 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 or program that is stored on the DVD. The more data that is contained on a disc, the smaller and more closely packed the pits must be. The smaller the pits (and therefore the bumps), the more precise the reading laser must be.DATA TRANSFER RATE-36MBPS
Technology used-
CD DVD Blu-ray
Recording laser wavelength
780nm 650nm 405nm
Thickness 1.11 0.6 0.1
Recording capacity 0.65gb 4.7gb 23305gb25025gb
Line speed 1.20m/sec 3.49m/sec 5.28m/s4.92m/s
Tabular data
BD1. Can store large
amount of data2. It uses blue-
violet ray..hence it can be concentrated accurately and hence the data can be compressed
3. Its thickness is 0.1
DVD1. Cannot store large
amount of data2. It uses Red-laser
ray..hence it cannot be concentrated accurately and hence the data cannot be compressed
3. Its thickness is 0.6
COMPARISON BETWEEN BD AND DVD
A single sided 25 gigabyte Blu-ray disc hosts the capacity of approximately 36 CDs.
The Blu-ray Disc: The Ultimate Optical Disc.
To enable this huge capacity, the Blu-ray disc incorporates a track pitch of
0.32 microns, compared to the 0.74 microns track pitch of DVD disc. The diameter of the laser spot is about one fifth as that of DVD. Because of the blue violet laser short 405 nano meter recording wavelength and the object lenses large 0.85 numerical aperture, the recording layer must be situated extremely close to the disc surface.
BLU RAY ‘S DURABILITY ADVANTAGE
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)
FEATURES OF BD
With BD we can: Record HDTV without any quality loss Instantly skip to any spot on disc Record one program while watching other on the disc Create playlists Edit or reorder programs recorded on disc Automatically search for an empty space on the disc to avoid
recording over a program Access to web to download subtitles and other extra features And many more…
Capacity: 25GB (single layer), 50GB (dual layer). Tested up to 100GB, the theoretical limit is 200GB.
Compression: MPEG-2, AVC MPEG-4, VC-1
Max Resolution: 1980x1080/24p, 601, 50i
Max Video Bitrates: 40Mbps
Audio Codec: Linear PCM, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS, DTS HD
Max Audio Streams: 32 streams
Backers: Sony, Dell, Hewlett-Packard, Hitachi, LG Electronics, Matsushita (Panasonic), Mitsubishi, Philips, Pioneer, Samsung, Sharp, TDK, Thomson Multimedia. Possibly Microsoft.
Compatibility: Backwards-compatible with standard DVD.
Interactivity: Java-based
Specifications
Thank-you
