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Monday, June 17, 2002
First Blu-Ray Disc key characteristics...


The Blu-ray Disc using blue-violet laser achieves over 2-hour digital high definition video recording on a 12cm diameter CD/DVD size phase change optical disc.

Large recording capacity up to 27GB:
By adopting a 405nm blue-violet semiconductor laser, with a 0.85NA field lens and a 0.1mm optical transmittance protection disc layer structure, it can record up to 27GB video data on a single sided 12cm phase change disc. It can record over 2 hours of digital high definition video and more than 13 hours of standard TV broadcasting (VHS/standard definition picture quality, 3.8Mbps)

High-speed data transfer rate 36Mbps:
It is possible for the Blu-ray Disc to record digital high definition broadcasts or high definition images from a digital video camera while maintaining the original picture quality. In addition, by fully utilizing an optical disc’s random accessing functions, it is possible to easily edit video data captured on a video camera or play back pre-recorded video on the disc while simultaneously recording images being broadcast on TV.

Easy to use disc cartridge:
An easy to use optical disc cartridge protects the optical disc’s recording and playback phase from dust and fingerprints.

Main Specifications

Recording capacity: 23.3GB/25GB/27GB
Laser wavelength: 405nm (blue-violet laser)
Lens numerical aperture (NA): 0.85
Data transfer rate: 36Mbps
Disc diameter: 120mm
Disc thickness: 1.2mm (optical transmittance protection layer: 0.1mm)
Recording format: Phase change recording
Tracking format: Groove recording
Tracking pitch: 0.32um
Shortest pit length: 0.160/0.149/0.138um
Recording phase density: 16.8/18.0/19.5Gbit/inch2
Video recording format: MPEG2 video
Audio recording format: AC3, MPEG1, Layer2, etc
Video and audio multiplexing format: MPEG2 transport stream
Cartridge dimension: Approx. 129 x 131 x 7mm


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Yamaha's CRW-F1 poised to replace the floppy disk with indrustry's first 24x re-write speed and Mt. Rainier support     Optical Storage News      Yamaha's CRW-F1 poised to replace the floppy disk with indrustry's first 24x re-write speed and Mt. Rainier support

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