Blue Ray Disk- Edutechlearners

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SEMINAROn

Blu-Ray Disc

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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.


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Developed by:


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.


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Developed by:


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.


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How CD/DVD/BD works

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• 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 pitwww.edutechlearners.com

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Blu-ray Disc Rewritable


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CD vs DVD vs Blu-ray writing


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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.

Keylaser light

laser light 1/2o polarization

laser light –1/2o polarization


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BD Vs DVD CAPACITYBD Vs DVD CAPACITYBD Vs DVD Vs CD CAPACITYBD Vs DVD Vs CD CAPACITY


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Main Parameters


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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..


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THANKS


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Blue Ray Disk- Edutechlearners