Hitachi DZ-MV100A Owners Guide - Page 33

DVD-RAM Discs DVD-RAM Discs W○ ○h○a○t ○is○ ○D○V○D DVD stands for digital versatile disc: It is attracting the attention of computer and video game industry companies, since it can store high-quality data in bulk. At the same time, recording formats that were formerly different for each of image, sound and data are now unified, and it is expected that highly compatible, open multimedia will become feasible. Under these circumstances, the DVD Forum was started: no less than 200 companies worldwide participate in this Forum, accepting many requests from various fields; and they are proceeding with DVD standardization as the universal media of the next generation. Products conforming to this standard include various discs: DVD-Video that is spreading remarkably, DVD-ROM (read only) for computers, DVD-R (write once/read many), DVD-RAM (rewritable), etc. The diameter of all these discs is 12 cm, the same as for a CD. D○ V○ D○ ○-R○ A○ M○ ○ S○ t○a○n○d○a○rd Most 12 cm DVD-RAM discs marketed as of third-quarter, 2000 conform to DVDRAM Book 1.0; and storage per side is 2.6 GB. The DVD Forum settled on a plan for new Book 2.1 standard in 1999, stipulating a 12 cm disc with 4.7 GB storage per side, or an 8 cm disc with the same density and 1.4 GB storage per side. An 8 cm DVD-RAM disc conforming to this Book 2.1 standard is expected as the medium for digital recording because of its compactness and mass storage. It has been adopted to this DVD camcorder, a world first, as a home use DVD camcorder. (as of thirdquarter, 2000) DVD-RAM Standard Book Diameter Storage capacity Transfer rate Laser used Book 2.1 Book 1.0 12cm 8cm 12cm 4.7 GB/side 1.4 GB/side 2.6 GB/side 9.4 GB on both sides 2.8 GB on both sides 5.2 GB on both sides 22.16 Mbps 11.08 Mbps 650 nm red laser 33