The document discusses the development and advantages of Blu-ray discs, highlighting their higher storage capacity compared to DVDs and CDs, which is essential for high-definition video and data applications. The Blu-ray format allows seamless migration from DVDs while providing backward compatibility. Key benefits include lossless recording of HDTV, instant access to any part of the disc, and web connectivity.

1. 1
SEMINAR
On
Blu-Ray Disc
Presented by:
EdutechLearners
www.edutechlearners.com

2. 2
Developed by:
Blu-ray Disc Association a group of
leading consumer electronics and
PC companies.
Developed by:
Blu-ray Disc Association a group of
leading consumer electronics and PC companies.
www.edutechlearners.com

3. 3
Developed by:
Blu-ray Disc Association a group of
leading consumer electronics and
PC companies.
Introduction:
The demand for high storage capacity led to the
evolution of DVD format, which enabled high quality,
standard definition video distribution and recording.
Further, the increased capacity accommodated more
demanding data applications. At the same time, the
DVD specification use the same form factor as the CD,
making seamless migration to the next generation
format possible and offering complete backward
compatibility. Currently high definition video demands
a new solution.
www.edutechlearners.com

4. 4
Developed by:
Blu-ray Disc Association a group of
leading consumer electronics and
PC companies.
The need for Blu-ray:
Today, digital music, photo and video storage on PCs
occupy more storage space. Broadband connection
allows for the downloading of vast amount of data and
increasing developments in digital photo and video
equipment not only raise quality requirements, but also
the amount of memory that is necessary to store files.
www.edutechlearners.com

5. 5
How CD/DVD/BD works
4mµ
6mµ 2µm
6mµ
sapphire
AlGa N:Mg
• Disk preformatted with grooves and lands
• Grooves have pits to mark data
• Disk rotates in drive and a laser projects light onto the surface
• Laser light is reflected and picked up by a light sensitive detection unit
• DVD works on a similar principle, but laser is of shorter wavelength.
• Laser for BD is of still smaller wavelength.
On surface In pit
www.edutechlearners.com

6. 6
Blu-ray Disc Rewritable
www.edutechlearners.com

7. 7
CD vs DVD vs Blu-ray writing
www.edutechlearners.com

8. 8
Magneto-optical disks (reading)
Reading the disk
• As with CD/DVD/BD, laser is reflected off surface of rotating disk.
• Laser light is polarized – all wave oscillations are in the same plane.
• Reflected laser light has polarization changed depending on magnetic
orientation of point being scanned.
Key
laser light
laser light 1/2o
polarization
laser light –1/2o
polarization
www.edutechlearners.com

9. 9www.edutechlearners.com

10. 10www.edutechlearners.com

11. 11www.edutechlearners.com

12. 12
10
BD Vs DVD CAPACITYBD Vs DVD CAPACITY
BD Vs DVD Vs CD CAPACITYBD Vs DVD Vs CD CAPACITY
www.edutechlearners.com

13. 13
Main Parameters
www.edutechlearners.com

14. 14
BLU-RAY ADVANTAGES
 Record HDTV without any quality loss.Record HDTV without any quality loss.
 Instantly skip to any spot on the disc.Instantly skip to any spot on the disc.
 Automatically search for empty space.Automatically search for empty space.
 Access the webAccess the web..
www.edutechlearners.com

15. 15
THANKS
www.edutechlearners.com