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To: WALT REISCH who wrote (3773)	6/24/1999 7:20:00 AM
From: Tom Hoff	Read Replies (1) \| Respond to of 8393

This should help lead to the video replacement by next summer. For potential market size think of all the VCR's and and all the blank tapes everyone has for each VCR. I have 15 blank tapes floating around. DVD Forum Finalizes Physical Format of 4.7GB DVD-RAM, Version 2.0 TOKYO--(BUSINESS WIRE)--June 23, 1999--The DVD Forum today announced that its Steering Committee has formally approved the physical format of the DVD-RAM disks for 4.7 gigabytes (GB) as version 2.0. The Format Book for version 2.0 (Physical Specifications) will be published in the third quarter of this year. The physical format is the essential part of the 4.7GB DVD-RAM specifications. The 4.7GB DVD-RAM format will be compatible with the existing 2.6-gigabyte (version 1.0) DVD-RAM format as well as with other DVD formats established by the DVD Forum. The new 4.7-gigabyte format is expected to expand PC and audio-visual applications as well as other future applications. The Working Group 5 of the DVD Forum, the body responsible for DVD-RAM format, started formulating the 4.7-gigabyte format in November 1997 and in November 1998 released the Format Book detailing the version 1.9 specification. Round robin testing was started in February this year and moved forward for final confirmation. The decision by the Steering Committee of the DVD Forum formally approving the 4.7-gigabyte physical format as the final format will accelerate the introduction of the next generation of DVD-RAM products. Outline of specifications DVD-RAM V 2.0 DVD-RAM V 1.0 DVD-ROM Storage capacity 4.7GB/Side 2.6GB/Side 4.7GB/Side Laser wavelength 650nm 650nm 635nm,650nm Numerical aperture of lens 0.6 0.6 0.6 Recording method Phase change Phase change Embossed pits Track format Wobble land groove Wobble land groove Series pits Recording track pitch 0.615um 0.74um 0.74um Data bit length 0.28um 0.41um 0.27um Sector size 2048 bytes 2048 bytes 2048 bytes Modulation system 8 to 16 RLL 8 to 16 RLL 8 to 16 RLL Error correction Reed-Solomon Reed-Solomon Reed-Solomon Product Code Product Code Product Code No. of zones 35 24 (CLV) Fault management Yes Yes Recording data rate 22.16M/bs 11.08Mb/s CONTACT: DVD Forum Office of Secretary, +81-3-5444-9580 FAX:+81-3-5444-9436 KEYWORD: CALIFORNIA INTERNATIONAL EUROPE ASIA PACIFIC BW1659 JUN 22,1999 19:18 PACIFIC 22:18 EASTERN