صفحه 1:
ره
Blu-ray Disc
صفحه 2:
Discs ی وب رن
Wises
صفحه 3:
۷
۱۳ هت توت
vy Building a Blu-ray Disc
yitow Blu-ray Reads Data
y Blu-ray Competitors
صفحه 4:
Introduction to How Blu-
ray Discs Work
> — ingle-layer Blu-ray disc-27 GBdata ‘2h HDTV! 7shst.
> RAdouble-Cayer Blu-ray disc-50GBi4¥.5AHDTVi2ohst.
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pas =
صفحه 5:
Building a Blu-ray Disc
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09 ed ned ene near ee ete nat No Renee eH
pits are voy O.0S pew} track pick Pro O.PP Yoo t O.OC pw
OO tickuess (7.2 millimeters)asa DVD!
Birefringence-data between twopolycarbonatelayers(o.6
mm) disctilt-thedisccan not beread
لت سب اس
2
صفحه 6:
How Blu-ray Reads Data
۱ heen ا nes ca ae
5
2
aaa ee aU eee nD فا شم تیا
mechanism no disc tilt
2
Because the data is closer tothe surface,ahardcoatingisplaced
on the outside of the disc to protect it fromscratchesand
fingerprints.
27
ومر ره یت همك
درس لس هک ۲
=a ۹
صفحه 7:
Cost 2
DVDs -by injection molding the twoo0.6-mm discs recording layer
between them! must be donevery carefully toprevent ۱
ی
181 ees Ua Te cee Me mC By
Rae eT CN CURRENT gee oO
-The twodiscsaregluedtogether.
Blu-ray discs only do the injection-molding process ona single 7.7-
mm disc! that savings balances out the cost of adding theprotective
Cayer ! the endprice of BDis nomorethantheprice ofa regular
۷۰
Blu-ray discsare betterarmedthancurrent DVDs. They come
equipped witha secureencryption system --auniquelD that
protectsagainst video piracy andcopyright infringement.
صفحه 8:
Formats
> DVDsandCDsstartedwithread-onlyformatsandonly
Cater addedrecordableandre-writable formats, Blu-ray is
:15ه 01 تأناقت اك ]تك أسملتء 116411050 و اكع د ]ها س1
-BD-ROM (read-only) -for pre-recordedcontent
-BD-R(recordable) -for PC data storage
-BD-RW (rewritable) -for PC data storage
1۱ Aenea TO - واقتك مع 311107 :جم
للكت
سس
صفحه 9:
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لع اقدامك - 618 ق. و ته ع5 1ع را
ا
۷
China -Enfianced Video Disc (EVD)
Caer ae ena Tt
> Pioneers developing an optical disc that will blow away theharddiscin most ofour
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صفحه 10:
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صفحه 11:
Blu-ray vs. DVD Capacity
Single-layer DVD
4.7 GB of data
average two-hour standard-definition movie
with a few extra features
Single-layer Blu-ray disc
27 GB of data
more than 13 hours
of standard video
more than two hours of
high-definition video
Double-layer Blu-ray disc
Lo dQ
0 10 20 30 40 50
۱004 ۷۵۸۷۵۷۵
صفحه 12:
DVD Vs. Blu-Ray Construction
DVD BD
4.7 GB 25 GB
Polycarbonate Layer
minimum — minimum
pitlength pit length
ae 0.15um
Recording Layer
Optical Transmission 0 5-6
024 and Protection Layer an
Laser 0-744m Blue wen
Laser
| ©2004 ۷۵۷/۹۵۷۵۸۵
صفحه 13:
CD vs. DVD vs. Blu-ray Writing
cD DVD BD
780-nm Red Laser 650-nm Red Laser 405-nm Bive Laser
Lens Aperture = 0.45 Lens Aperture = 0.6 Lens Aperture = 0.8
Wo Ee
One 1.2-mm Two 0.6-mm One ۱
polycarbonate ۳ polycarbonate
layer
track pitch track pitch track pitch
= 1.6um = 74 = 30۳۳
(©2004 HowStuffWorks
صفحه 14:
Gave BO PADD