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Dvd-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. discs using the dvd-video specification require a dvd drive and an mpeg-2 decoder (e.g., a dvd player, or a computer dvd drive with a software dvd player). commercial dvd movies are encoded using a combination mpeg-2 compressed video and audio of varying formats (often multi-channel formats as described below). typically, the data rate for dvd movies ranges from 3 mbit/s to 9.5 mbit/s, and the bit rate is usually adaptive. it was first available for retail around march 26, 1997. the dvd-video specification was created by dvd forum and can be obtained from dvd format/logo licensing corporation for a fee of $5,000. the specification is not publicly available and every subscriber must sign a non-disclosure agreement. certain information in the dvd book is proprietary and confidential.