Toronto video editing - blue-ray discs
Blu-ray Disc is a next-generation optical disc format meant for high definition video (HD) and high density data storage, and is one of two competing standards for HD optical media. Its competitor is HD-DVD. Blu-ray gets its name from the shorter wavelength (405 nm) blue laser that, in addition to other techniques, allows it to store substantially more data than a DVD, which has the same physical dimensions but uses a longer wavelength (650 nm) red laser. Blu-ray was jointly developed by a group of leading consumer electronics and PC companies called the Blu-ray Disc Association (BDA), which succeeded the Blu-ray Disc Founders (BDF). The Blu-ray camp is lead by Sony and Philips.
One single-layer Blu-ray Disc (BD) can hold about 25 GB or over two hours of HD video plus audio, and the dual-layer disc can hold approximately 50 GB (up to 54GB). The data transfer rate is 36 Mbit/s (54 Mbit/s for BD-ROM), but 2x speed prototypes with a 72 Mbit/s transfer rate are now in development. The BD-RE (rewritable) standard is now available, to be followed by the BD-R (recordable) and BD-ROM formats in mid-2004, as part of version 2.0 of the Blu-ray specifications. BD-ROM pre-recorded media are to be available by late 2005. Blu-ray Discs with capacities of 100 GB and 200 GB are currently being researched, with these capacities achieved by using four and eight layers respectively. On May 19, 2005, TDK announced a prototype four-layer 100 GB Blu-ray disc.
posted by Azure Production @ 11:00 AM
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