2. Media type:High-density optical disc
Encoding:MPEG-2, MPEG-4 AVC (H.264), and VC-
1
Capacity:25 GB (single layer), 50 GB (dual layer)
Read mechanism:1x@36 Mbit/s & 2x@72 Mbit/s
Developed by:Blu-ray Disc Association
Usage:Data storage,
High-definition video,
and PlayStation 3 games
BLU-RAY DISC
3. The name is a combination of "Blue" (blue-violet
laser) and "Ray" (optical ray). According to the
Blu-ray Disc Association the spelling of "Blu-
ray" is not a mistake, the character "e" was
intentionally left out so the term could be
registered as a trademark
The format was developed to enable recording,
rewriting and playback of high-definition video
(HD), as well as storing large amounts of data
Why go for blu-ray?
1. The benefit of using a blue-violet laser (405nm) is
that it has a shorter wavelength than a red laser
(650nm), which makes it possible to focus the laser
spot with even greater precision.
2. By decreasing the wavelength, increasing the numerical
aperture from 0.60 to 0.85 and making the cover layer thinner to
avoid unwanted optical effects, the laser beam can be focused
to a smaller spot. This allows data to be packed more
tightly and stored in less space
4. Blu-ray Disc Association (BDA),
a group of leading consumer electronics, personal computer and media
manufacturers, with more than 180 member companies from all over the world
Apple Computer, Inc.
Dell Inc.
Hewlett Packard Company
Hitachi, Ltd.
LG Electronics Inc.
Matsushita Electric Industrial Co., Ltd.
Mitsubishi Electric Corporation
Pioneer Corporation
Royal Philips Electronics
Samsung Electronics Co., Ltd.
Sharp Corporation
Sony Corporation
Sun Microsystems, Inc.
TDK Corporation
Thomson Multimedia
Twentieth Century FoX
Walt Disney Pictures
Warner Bros. Entertainment
5. Data readwrite capacity
1x speed is defined as 36Mbps and 2x -72mbps
Blu-ray also has the potential for much higher speeds, as a result of the
larger numerical aperture (NA) adopted by Blu-ray Disc
The large NA value effectively means that Blu-ray will require less recording
power and lower disc rotation speed than DVD and HD-DVD to achieve the
same data transfer rate.
Data and video stoage capacity
Single layer-25gb and double layer-50gb
Over 9 hours of high-definition (HD) video on a 50GB disc.
About 23 hours of standard-definition (SD) video on a 50GB disc.
Audio and video codec compatibility
Linear PCM (LPCM) - up to 8 channels of uncompressed audio. (mandatory)
Dolby Digital (DD) - format used for DVDs, 5.1-channel surround sound. (mandatory)
Dolby Digital Plus (DD+) - extension of Dolby Digital, 7.1-channel surround sound.
(optional)
Dolby TrueHD - lossless encoding of up to 8 channels of audio. (optional)
DTS Digital Surround - format used for DVDs, 5.1-channel surround sound.
(mandatory)
DTS-HD High Resolution Audio - extension of DTS, 7.1-channel surround sound.
(optional)
DTS-HD Master Audio - lossless encoding of up to 8 channels of audio. (optional)
6.
7. optical media formats
Laserdisc
Compact disc (CD): Red
Book, 5.1 Music Disc,
SACD, PhotoCD, CD-R,
CD-ROM, CD-RW, Video
CD, SVCD, CD+G, CD-
Text, CD-ROM XA, CD-
Extra, CD-i Bridge, CD-i
MiniDisc
DVD: DVD-R, DVD+R,
DVD-R DL, DVD+R DL,
DVD-RW, DVD+RW,
DVD-RW DL, DVD+RW
DL, DVD-RAM, DVD-D
HD DVD: HD DVD-R, HD
DVD-RW, HD DVD-RAM
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 for
HD video recording and PC data
storage
BD-J-sun java software support
Blu-ray formats
8. Video codec compatibility
MPEG-2 - enhanced for HD, also used for playback of DVDs and HDTV
recordings.
MPEG-4 AVC - part of the MPEG-4 standard also known as H.264 (High
Profile and Main Profile).
SMPTE VC-1 - standard based on Microsoft's Windows Media Video
(WMV)technology.
Hard-coating technology
Since the Blu-ray data layer is closer to the surface of the disk, compared to
the DVD standard, it was at first more vulnerable to scratches
Blu-ray discs use their own proprietary hard-coat technology called
ScratchGuard
9. Software support( Bd-j ,BD+)
This Java Version is called BD-J and is a subset of the Globally Executable
MHP (GEM) standard. GEM is the world-wide version of the Multimedia
Home Platform standard
Sun Microsystems' Java cross-platform software environment included in all
Blu-ray Disc players as a mandatory part of the standard. Java is used to
implement interactive menus on Blu-ray Discs.
Inclusion of a Java Virtual Machine as well as network connectivity in BD
devices will allow updates to Blu-ray Discs via the Internet, adding content
such as additional subtitle languages and promotional features that are not
included on the disc at pressing time
BD+ was developed by Cryptography Research Inc. and is based on their
concept of Self-Protecting Digital Content
They come equipped with a secure encryption system -- a unique ID that protects
against video piracy and copyright infringement.
10. BD vs HD-DVD
The capacity
The hardware
support(Toshiba is the
only company offering a
stand-alone HD-DVD
player )
Blu-ray has also
adopted a higher data
transfer rate for video
and audio (54Mbps vs
36.55Mbps) over HD-
DVD
CORPORATE SUPPORTS
12. Ongoing development
JVC has developed a three layer technology that allows putting
both standard-definition DVD data and HD data on a BD/DVD
combo
Quad-layer (100 GB) discs have been demonstrated on a drive
with modified optics (TDK version)
Regions for Blu-ray standard
Region code Area
A- North America, Central America, South
America, Japan, Taiwan North Korea, South
Korea, Hong Kong, and Southeast Asia
B- Europe, Greenland, French territories, Middle
East, Africa, Australia, and New Zealand
C- India, Bangladesh, Nepal, Mainland China,
Pakistan, Russia, Central, and South Asia.
Cost
2x single-layer BD-R discs, with a capacity of 25 GB –us$12
4x double-layer –us$60
13. For more information log on to----:
http:www.bluray.com
http:www.wikipedia.org
http:www.sonypictures.com
http:www.blurayassociation.com
http:www.google.com
