Technical Seminar on (1)

8/6/2019 Technical Seminar on (1)

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By Prashant chaprana

2k7-MRCE-ECE-39

TECHNICAL SEMINAR ON

BLU-RAY TECHNOLOGY

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Introduction

yBlu-ray (not Blue-ray) also known as Blu-rayDisc (BD), is the name of a next-generationoptical disc format jointly developed by theBlu-ray Disc Association (BDA).

yThe format offers more than five times thestorage capacity of traditional DVDs and canhold up to 25GB on a single-layer disc and50GB on a dual-layer disc. This extra capacity

combined with the use of advanced video and 2blu-ray technology8-Aug-11


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The first DVR Blue prototypes were unveiled at

the CEATEC exhibition in October 2000. On

February 19, 2002, the project was officially

announced as Blu-ray, and Blu-ray Disc was

founded by the nine initial members.

The first consumer device was in stores on

April 10, 2003. This device was the Sony BDZ-

S77, a BD-RE recorder that was made available

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Comparison of CD,DVD,Blu ray disc

Parameter CD DVD BD .

Disk diameter 120 mm 120 mm 120 mm

Disk thickness 1.2 mm 1.2 mm 1.2 mm

Laser wavelength 780 nm 650 nm 405 nm

Numerical aperture 0.45 0.60 0.85

Minimum pit length 0.83 um 0.4 um 0.138 um

Data rate 1.2 Mb/sec 11 Mb/sec 36 Mb/sec

Number of sides one one or two one or two

Number of data layers One ----- One or two Data capacity ~680 MB 4.7 GB (1L) 27 GB

8.5 GB (2L) 50 GB (2L)

1 7 GB (2L/2S)



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Competition from HD DVD

yHD DVD had a head start in the high definitionvideo market, as Blu-ray Disc sales were slowto gain market share. The first Blu-ray Disc

player was perceived as expensive and"buggy", and there were few titles available.

y

This changed when the PlayStation 3 waslaunched, since every PS3 unit also functionedas a Blu-ray Disc player.

yBy January 2007, Blu-ray discs had outsold HD 7blu-ray technology8-Aug-11


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End of the format warand future

prospects-

On January 4, 2008, a day before CES 2008,

Warner Bros. (the only major studio stillreleasing movies in both HD DVD and Blu-ray

Disc format) announced that it would release

only in Blu-ray Disc after May 2008

Following these new developments, on

February 19, 2008, Toshiba announced it

would end production of HD DVD devices,

allowing Blu-ray Disc to become the industry 8blu-ray technology8-Aug-11


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Technology

Laserand optics

Blu-ray Disc uses a "blue" (technically violet)

laser, operating at a wavelength of 405 nm, toread and write data.

The diodes are InGaN (Indium Gallium Nitride)lasers that produce 405 nm photons directly,

that is, without frequency doubling or other

nonlinear optical mechanisms.10blu-ray technology8-Aug-11


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The blue-violet laser's shorter wavelength

makes it possible to store more information

on a 12 cm CD/DVD-size disc.

The minimum "spot size" on which a laser can

be focused is limited by diffraction, and

depends on the wavelength of the light and

the numerical aperture of the lens used tofocus it.

By decreasing the wavelength, increasing the

numerical aperture from 0.60 to 0.85, and 12blu-ray technology8-Aug-11


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Hard-coating technology

yThe first discs were housed in cartridges forprotection, resembling Professional Discsintroduced by Sony in 2003.

yTDK was the first company to develop aworking scratch-protection coating for Blu-ray

Discs. It was named Durabis.

yAll Blu-Ray Disc media are required byspecification to be scratch-resistant. DVD

media are not required to be scratch-resistant,13blu-ray technology8-Aug-11


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Other video formats

Analog formats

y352576/480 (250 lines): Umatic, Betamax,VHS, Video8 (PAL/NTSC)

y420576/480 (300 lines): Super Betamax,Betacam (professional) (PAL/NTSC)

y460576/480 (330 lines): Analog Broadcast

(PAL/NTSC)y590576/480 (420 lines): LaserDisc, Super

VHS, Hi8 (PAL/NTSC)

y700576/480 (500 lines): Enhanced DefinitionBetamax (PAL/NTSC)



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Digital formatsy 352288/240 (250 lines at low-definition): Video

CD (PAL/NTSC)

y 720576/480 (500 lines): DVD, miniDV, Digital8(PAL/NTSC)

y 720576/480 (380 lines): Widescreen DVD(PAL/NTSC)

y 1280720 (680 lines): Blu-ray, D-VHSy 14401080 (760 lines): miniHDV, D-VHS

y 19201080 (1020 lines): Blu-ray



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Software standards

Codecs The BD-ROM specification mandates certain

codec compatibilities for both hardware

decoders (players) and movie software(content).



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Video

For video, all players are required to support

MPEG-2 Part 2, H.264/MPEG-4 AVC, and

SMPTE VC-1. MPEG-2 is the codec used on

regular DVDs, which allows backwards

compatibility



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Audio

For audio, BD-ROM players are required to

support Dolby Digital (AC-3), DTS, and linear

PCM. Players may optionally support Dolby

Digital Plus and DTS-HD High Resolution Audio

as well as lossless formats Dolby TrueHD and

DTS-HD Master Audio.



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Bit rate

For users recording digital television

programming, the recordable Blu-ray Disc

standard's initial data rate of 36 Mbit/s is

more than adequate to record high-definition

broadcasts from any source (IPTV,

cable/satellite, or terrestrial)



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Container Format

yAudio, video and other streams aremultiplexed and stored on Blu-ray Video discsin a container format based on the MPEG

transport stream.y It is also known as BDAV MPEG-2 transport

stream and can use filename extension .m2ts.Blu-ray Disc Video titles authored with menusupport are in the BDMV (Blu-ray Disc Movie)format and contain audio, video, and otherstreams in BDAV container.

yAt the 2005 JavaOne trade show, it was' -



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Region codes

The Blu-ray Disc region coding scheme divides

the world into 3 regions, labelled A, B, and C.

Region A includes most North, Central andSouth American and Southeast Asian

countries plus Taiwan, Hong Kong, Japan and

Korea.

Region B includes most European, African and

southwest Asian countries plus Australia and

New Zealand.

Region C contains the remaining central and21blu-ray technology8-Aug-11


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Blu ray regions



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The Variants

Mini Blu-ray Disc

Blu-ray Disc recordable

BD9 and BD5

AVCHD

VCREC



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Any Questions?

Thank you


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