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1. BLU-RAY
TECHNOLOGY

2. WHAT IS BLU-RAY?
•It is the name of a next-generation optical disc format
jointly developed by the Blu -ray Disc Association
(BDA).
•The format was developed to enable recording,
rewriting and playback of high-definition video (HD),
as well as storing large amounts of data.

3. WHY IT IS NAMED AS BLU-RAY?
The name Blu-ray is derived from the underlying
technology, which utilizes a blue-violet laser to read
and write data. The name is a combination of "Blue"
(blue-violet laser) and "Ray" (optical ray).

4. MANUFACTURERS
The Blu-ray Disc format was developed by the 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. The
Board of Directors currently consists of:
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

5. TECHNICAL DETAILS
•A single-layer Blu-ray disc, can hold up to 25 GB of
data -- that's more than two hours of high-definition
video or about 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-definition
video or more than 20 hours of standard video.

6. WORKING
•The Blu-ray disc overcomes DVD-reading issues by
placing the data on top of a 1.1-mm-thick
polycarbonate layer. Having the data on top prevents
birefringence and therefore prevents readability
problems. And, with the recording layer sitting closer
to the objective lens of the reading mechanism, the
problem of disc tilt is virtually eliminated. Because
the data is closer to the surface, a hard coating is
placed on the outside of the disc to protect it from
scratches and fingerprints.

8. SOFTWARE SUPPORTED
VIDEO CODECS
• 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.

9. AUDIO CODECS
Dolby Digital (DD) - format used for DVDs also
known as AC3, offers 5.1-channel surround sound.
•Dolby Digital Plus (DD+) - extension of DD, offers
increased bitrates and 7.1-channel surround sound.
•Dolby True HD - extension of MLP Lossless, offers
lossless encoding of up to 8 channels of audio.
•DTS Digital Surround - format used for DVDs, offers
5.1-channel surround sound.
•DTS-HD - extension of DTS, offers increased
bitrates and up to 8 channels of audio

10. APPLICATION
•Many of the famous movie studios are releasing there
their movies on BLU-RAY DVD.
•As it provides greater storage capacity, so more
amount of data can be stored in more protective
manner as compared to convectional DVD.
•Sony is releasing games DVDs in BLU-RAY format
for their home video game consoles.

11. ADVANTAGES
•It gives a high storage capacity.
•It can be used to store about 4.5 hours of high
definition video
•It provides better data protection.
•It can be burned while reading it.

12. DISADVANTAGES
•Compatibility
Blu-Ray DVD are not compatible with CD-DVD
ROMs available these days
•It is quiet expensive

13. CONCLUSION
•It is the best optical media available these days
•Can be used for high data storage
•But has a compatibility problem

14. Thank you