Blu-ray disc is a new optical disc format that can store over 5 times as much data as a traditional DVD. It was developed by the Blu-ray Disc Association, a group of leading electronics and media companies including Apple, Dell, LG, Sony, and Sharp. Blu-ray discs can store 25GB on a single layer and 50GB on a dual layer. Formats include read-only BD-ROM discs for movies and games, as well as recordable BD-R and rewritable BD-RE discs. Blu-ray has a higher storage capacity and video bit rate than DVD thanks to its use of a blue-violet laser rather than a red laser.

1. B.Ed (hons) elementary

3. Blu-ray disc is the
name of a new optical
disc
format that is rapidly
replacing DVD”.
The format more than
five times the storage
capacity of traditional
DVDs and can holds to
25GB on a single-layer
disc and 50GB on a
dual layer disc.

4.  Name of blu-ray discName of blu-ray disc::
The name Blu-ray is derived from the underlying
technology, which utilizes a blue-violet laser to
read and write data. The name is the combination
of “blue” (blue violet laser) and “ray” (optical ray).

5.  Who developed Blu-ray?Who developed Blu-ray?
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.
 The board of directors currently consist of:
Apple computer Inc,
Dell Inc,
LG electronics Inc,
Sony corporation,
Sharp corporation, etc

6.  What Blu-ray formats are planned?What Blu-ray formats are planned?
As with conventional CDs and
DVDs, Blu-ray plans to provide
a wide range of formats
including ROM/R/RW. The
following formats are part of the
Blu-ray disc specification:
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 of HD
video recording and PC data
storage.

7.  Blu-ray discBlu-ray disc::

8.  Physical mediaPhysical media::
Type Diameter
(cm)
Layers Capacity
(GB)
Standard disc
size, single layer
12 1 25.0
Standard disc
size,
Dual layer
12 2 50.1
Standard disc 12 3 100.1

9. Will blu-ray disc require an internet
connection?
No, you will not need an internet connection for basic
playback of blu-ray movies.

10.  Difference between Blu-ray disc and DVDDifference between Blu-ray disc and DVD::
Parameters Blu-ray DVD
Storage capacity 25GB (single-layer)
50GB (dual layer)
4.7 GB (single layer)
8.5 GB (dual layer)
Laser wavelength 405 nm (blue laser) 650 nm (red laser)
Numerical
aperture(NA)
0.85 0.60
Disc diameter
Disc thickness
120mm
1.2mm
120mm
1.2mm
Video bit rate (max) 40.0 Mbps 9.8 Mbps

11. Blu-ray disc and DVDBlu-ray disc and DVD::

12. What about Blu-ray for PCsWhat about Blu-ray for PCs?
There are plans for BD-ROM
(read only), BD-R
(recordable) and BD-RE
(rewriteable) drives for PCs
and with the support of the
world’s two largest PC
manufacturers, HP and Dell,
it’s likely that the technology
will be adopted as the next
generation optical disc
format for PC data storage
and replace technologies
such as DVD +_R, DVD
+_RW, and DVD-RAM .