?How Blu-ray Discs Work
اسلاید 1: How Blu-ray Discs Work by Dušan Ristić
اسلاید 2: Introduction to How Blu-ray Discs Work Building a Blu-ray Disc How Blu-ray Reads Data Blu-ray Competitors
اسلاید 3: Introduction to How Blu-ray Discs WorkŞingle-layer Blu-ray disc- 27 GB data;2h HDTV; 13h st.A double-layer Blu-ray disc- 50 GB;4.5h HDTV;20h st.blue,“- for the color of the laser ; “ray,“-for optical ray. The e in blue“- left of because an everyday word cannot be trademarked.nazadslikapočetna
اسلاید 4: Building a Blu-ray DiscLaser “writes”-pits; laser reads-the bumps A blue laser has a shorter wavelength (405 nanometers);pits are only 0.15 µm; track pitch from 0.74 µm to 0.32 µmBD thickness (1.2 millimeters) as a DVD; Birefringence-data between two polycarbonate layers(o.6 mm) disc tilt- the disc can not be readnazadslikapočetna
اسلاید 5: How Blu-ray Reads Datadata on top of a 1.1-mm-thick polycarbonate layer - no birefringence recording layer sitting closer to the objective lens of the reading mechanism –no disc tiltBecause the data is closer to the surface, a hard coating is placed on the outside of the disc to protect it from scratches and fingerprints. data transfer rate: BD - 36 Mbps ; DVD - 10 MbpsNazadslikapočetna
اسلاید 6: CostDVDs – by injection molding the two 0.6-mm discs recording layer between them; must be done very carefully to prevent birefringence. BD: -The two discs are molded. -The recording layer is added to one of the discs. -The two discs are glued together. Blu-ray discs only do the injection-molding process on a single 1.1-mm disc; that savings balances out the cost of adding the protective layer; the end price of BD is no more than the price of a regular DVD. Blu-ray discs are better armed than current DVDs. They come equipped with a secure encryption system -- a unique ID that protects against video piracy and copyright infringement. početnaNazad
اسلاید 7: Formats DVDs and CDs started with read-only formats and only later added recordable and re-writable formats, Blu-ray is initially designed in several different formats: -BD-ROM (read-only) - for pre-recorded content -BD-R (recordable) - for PC data storage -BD-RW (rewritable) - for PC data storage -BD-RE (rewritable) - for HDTV recording početnaNazad
اسلاید 8: Blu-ray CompetitorsJVC - Blu-ray/DVD combo disc - 33.5-GBHD-DVD or AOD (Advanced Optical Disc), Toshiba and NEC; single-layer HD-DVD-RW -15 GB; a double-layer -30 GB; a triple-layer -45 GB Warner Bros. Pictures -HD-DVD-9 ; uses a higher compression rate to put more information on a standard DVD. Taiwan -Forward Versatile Disc (FVD)- 5.4 GB- single-sided disc and 9.8 GB - double-sided discChina - Enhanced Video Disc (EVD)Sony -XDCAM and ProData (Professional Disc for Data). Pioneer is developing an optical disc that will blow away the hard disc in most of our PCs; holding - 500 GB; Pioneers lasers are ultraviolet, which have an even shorter wavelength than the blue. nazadpočetnaslika
اسلاید 9: See moreVideoExitThat’s all folks !!!!!!Dušan Ristić II4Presentation about Blu-ray Discs
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اسلاید 13: Samsung BD P100
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