10-04-2017, 08:51 PM
Blu-ray Disc SEMINAR REPORT
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Evolution
VHS: analog DVD: digital BD: high-definition
Enables recording, rewriting, and playback of high-definition video
Capable of storing information that the DVD and CD are not capable of holding
Foundation
Blu-ray disc (BD) is appropriately named after the blue laser used to write the data
The first blue laser was developed in 1996 by Shuji Nakamura (Nichia Corporation)
In 2002, an alliance was formed, called the Blu-ray Disc Association, including the likes of Sony, Samsung, Sharp, Hewlett-Packard, and Royal Phillips
The e is intentionally left out of the name due to trademark restrictions
Protection System
HDTV contains a copyright bit that is detected by the BD recorder. If the broadcast has no copyright bit, then the BD recorder is allowed to store the information.
Uses the Data Encryption Standard (DES) that has a key length of 56 bits.
A Key Block and Disc ID are written into the ROM area to prevent illegal copying.