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A blue-violet laser, emitting at a wavelength of 405 nanometres, reads the pits.
It’s a fascinating decision to prepare her audience with the artifice of the film she’s about to prepare, like watching the orchestra warm up before an opera.
is now available on Blu-ray, and while your home theater may not achieve quite the same effect as the Sydney Opera House (which is where the film premiered), it’s an admirable release that captures the crispness and majesty of the doc’s sumptuous visuals.
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Blu-ray represents the third generation of compact disc (CD) technology, after audio CDs and digital video discs (DVDs).
Motion pictures were especially suited for display on wide flat-panel HDTV screens, and in 2002 two competing but incompatible technologies were presented for storing HD video on a CD-sized disc: HD DVD, proposed by Toshiba and the NEC Corporation, and Blu-ray, proposed by a group led by Sony.
Both technologies employed a laser emitting light in the blue-violet end of the visible spectrum.
I have lectured at over fifty events and festivals across the country, and have prepared over a dozen DVD/Blu-ray bonus programs, examining the locations and history hidden in the background of classic silent films.
A short segment from the I have provided commentary, visual essays, and/or location tour programs to each of these Buster Keaton, Charlie Chaplin, and Harold Lloyd DVD and Blu-ray releases. Criterion Collection; a nice review of my program (here) College Ultimate Edition Seven Chances Ultimate Edition Buster Keaton: The Shorts Collection (1920-1923) Sherlock Jr.
Thus, the Blu-ray disc can hold more information than the DVD.
A single-layer Blu-ray holds 25 gigabytes (GB), and a dual-layer Blu-ray (one with two layers of information, one on top of the other) holds 50 GB. As television systems switched over to digital signaling, high-definition television (HDTV) became available, featuring much greater picture resolution (1,920 by 1,080 pixels) than traditional television (usually 720 by 480 pixels).