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DVD-RAM (DVD Random Access Memory) is a DVD-based disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers. DVD-RAM media have been used in computers as well as camcorders and personal video recorders since 1998.
DVD recorder drives can be used in conjunction with DVD authoring software to create DVDs near or equal to commercial quality, and are also widely used for data backup and exchange. As a general rule, computer-based DVD recorders can also handle CD-R and CD-RW media; in fact, a number of standalone DVD recorders use drives designed for computers.
Buffer underrun is minimized by a strategy in which the recorder burns a packet rather than an entire session or an entire disc. When using rewritable media (CD-RW, DVD-RW, DVD-RAM), the UDF file system organizes the disc into packets that are written individually. The packets are referenced by a single, updated address table.
Prior to the camcorder, a portable recorder and camera would be required. This is a Sony SL-F1 Betamax recorder and video camera. [2] Sony Betamovie BMC-110 (BMC-100P in PAL markets) is the first consumer camcorder. Released in 1983 for the Betamax format. It has no playback functionality and is only capable of recording.
It was resolved with both surviving however: DVD-R predominating for stand-alone DVD recorders and players, and (for computers) most DVD devices being engineered as dual format, to be compatible with both. As of 2007 DVD is the de facto standard for pre-recorded movies, and popular storage of data beyond the capacity of CD.
DVD-RAM may be running last-place in the computer community, but since Panasonic (for one that I know of) has chosen DVD-RAM for all of its DVD recorders it appears that DVD-RAM will be getting some significant new sales volume. This should drive down the manufacturing cost and drive further adoption in both the video and computer communities.
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