BLU-RAY

TECHNOLOGY

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.

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).

MANUFACTURERSThe 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

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.

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.

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.

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

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.

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.

DISADVANTAGES

•Compatibility

Blu-Ray DVD are not compatible with CD-DVD

ROMs available these days

•It is quiet expensive

CONCLUSION

•It is the best optical media available these days

•Can be used for high data storage

•But has a compatibility problem

Thank you