The DVD drive will usually also play regular CD-ROM discs and DVD-Video disks.ĭVD-RAM (DVD–Random Access Memory) is a disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers. Typically, the data rate for DVD movies ranges from 3 Mbit/s to 9.5 Mbit/s, and the bit rate are usually adaptive.ĭVD-ROM is the type of drive and disc for use on computers. Commercial DVD movies are encoded using a combination of H.262/MPEG-2 Part 2 compressed video and audio of varying formats (often multi-channel formats as described below).
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Discs using the DVD-Video specification require a DVD drive and an H.262/MPEG-2 Part 2 decoder (e.g., a DVD player, or a computer DVD drive with a software DVD player). DVD FormatsĭVD-Video is a consumer video format used to store digital video on DVD discs, and is currently the dominant consumer video format in Asia, North America, Europe, and Australia. DVDs are of the same dimensions as compact discs (CDs), but are capable of storing more than six times as much data. This compares to 650 megabytes (.65 gigabyte) of storage for a CD-ROM disk.
DVDs can be single- or double-sided, and can have two layers on each side a double-sided, two-layered DVD will hold up to 17 gigabytes of video, audio, or other information. It is mainly used for video and audio storage. Febru/ Posted by Irene on Related TechnologyĭVD is an optical disc storage format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995.
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