Blu-ray is an optical disc format that can store more data than DVDs. It uses a blue-violet laser to read and write data onto discs that can hold up to 50GB, allowing for high definition video and large amounts of data storage. Blu-ray was developed by the Blu-ray Disc Association and supports various high quality video codecs. Products started being available in the US and Canada in 2006, with companies like Samsung, Panasonic, and Sony producing Blu-ray players and discs that take advantage of the format's ability to provide enhanced viewing experiences for high definition televisions.

1. NAFIZ AHMED
1711EEE00131

2. DIFFERENCE AMONG CD, DVD AND BLU-
RAY IN PICTURE

4. COMPARISON BLU-RAY VS OTHER DISC

5. WHAT IS BLU-RAY?
• Blu-ray also known as Blu-ray Disc(BD)
is the name of a next-generation
optical disk format. The format was
developed to enable recording,
rewriting and playback of high-
definition video(HD),as well as storing
large amounts of data. The format offers
more than five times the storage
capacity of traditional DVD and can hold
up to 25GB on a single-layer disk and
50GB on a dual-layer disk.

6. The name Blu-ray is
derived from the
underlying technology,
which utilizes a blue-
violet laser to read and
right data .The name is a
combination of
"Blue"(blue-violet laser)
and "Ray" (optical ray).
Why the name Blu-Ray?

7. How fast can read/write data on a Blu-ray
disk?
According to the Blu-ray Disk specification, 1x speed
is defined as 36Mbps. However, as BD-ROM movies
will require a 54Mbps data transfer rate the minimum
speed we are expecting to see is 2x (72Mbps). We
assume a maximum disc rotation speed of 10,000
RPM, then 12x at the outer diameter should be

8. 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, with
more than 170
member companies

9. How much data needed to stare a
video on a Blu-ray disc?
A single-layer can store 25GB.
A dual-layer can store 50GB.
Over 9 hours of high-
definition(HD) on a50GB disc.
About 23 hours of standard-
definition(SD) video on a 50GB
disc

10. HOW VIDEO CODECS WILL BLU-RAY
SUPPORT?
• Linear PCM (LPCM)
• Dolby digital (DD)
• Dolby digital plus (DD+)
• Dolby True HD
• DTS Digital surround
• DTS-HD

11. When will be able to buy Blu-ray
products?
If you live in us or Canada you
can already find Blu-ray
players.
Some company produce Blu-
ray products as like Samsung,
Panasonic, sony, Philips etc.

12. Why should we upgrade from DVD to Blu-
ray?
The simple answer is
HDTV.