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Blu -Ray Discs

Blu -Ray Discs. How Blu -Ray Discs Work. Encodes data onto a disc by creating pits with a laser that can be read as binary code, just like CDs and DVDs. Uses 405nm blue (actually violet) laser, while DVDs use 650nm and CDs use 780nm red lasers.

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Blu -Ray Discs

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  1. Blu-Ray Discs

  2. How Blu-Ray Discs Work • Encodes data onto a disc by creating pits with a laser that can be read as binary code, just like CDs and DVDs. • Uses 405nm blue (actually violet) laser, while DVDs use 650nm and CDs use 780nm red lasers. • The smaller wavelength laser allows pits to be much smaller and closer together, allowing much more data to be recorded in the same area.

  3. How Blu-Ray Discs Work Cont. • Data is recorded closer to the surface, eliminating problems of birefringence and disc tilt • Hard coating on surface to protect from scratches and fingerprints

  4. Background • Created by Sony and introduced in 2002, they went on the market in 2006. • Had big competition from Toshiba's HD-DVDs: • Based on similar technology, • Have slightly smaller storage size, • Their players can also play normal DVDs • Blu-ray won the format war this spring, but still not very popular • Prices too high • Most people satisfied with DVDs • Blu-ray are finally gaining popularity this fall, • Prices starting to go down, to under $300 by the holiday season • More blu-ray movies being released.

  5. Benefits of Blu-ray Discs • Durable and Accurate • Increased storage capacity • 5 to 10 x more storage space then a DVD • More convenient when burning large amount of information • Better resolution and sound quality • 5 x better resolution then a DVD • User friendly • Easy transition from DVD to Blu-Ray

  6. Criticisms of Blu-ray Discs • HD-DVDs provide comparable storage and could be manufactured with the same equipment used to produce DVDs, saving on costs. • Blu-ray players are significantly more expensive than HD-DVD players. • HDTV required to fully utilize HD content on Blu-ray • DVDs are still good enough • First generation technology is prone to bugs and glitches • Blu-ray discs have playback problems due to an issue with the Sony BDP-S1 players’ handling of BD-J, the interactive Blu-ray Java specifications. • Through the use of better codec technology, the space on Blu-Ray discs is not actually needed for high-definition movies.

  7. Opinion • We support the use of Blu-ray technology because its large capacity will be necessary to satisfy the ever growing demand for data storage as HD content becomes more prevalent and publishers include more features. • However, we recommend waiting until second generation players are released and prices drop. • Also, HD-DVD already lost.

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