TV video | Camcorder | DigiCam | Media | Audio | Theater | Help | companies |
Introduction | l | Formats | Features |
l | l | Media | Models |
DVD-R is compatible with DVD-ROM, DVD-Video and DVD-Audio so that recorded DVD-R discs can be read on any suitable DVD hardware, depending on the format of the data contained on the DVD-R. However discs cannot use CSS copy protection. Also DVD-9 discs cannot be written to DVD-R. DVD-R discs comprise the following data areas:
DVD-R discs allow incremental writing (cf CD-R multisession writing). Two types of incremental writing are defined:
For both types each section of data written to the disc is a Bordered Area and is followed by the Border Out and Border In which precedes the next Bordered Area (if any). Each Bordered Area begins with the UDF file system and ends with the Virtual Allocation Table (VAT). Media and drives are capable of up to 4x writing speed, and faster speeds will be available. DVD+R discs should be called +R as they are not recognized by the DVD Forum. This format, which is essentially very similar to DVD-R, was developed by Philips and Sony. It is an extension of the DVD+RW format supported by the DVD+RW Alliance comprising HP, Philips, Ricoh, Sony, Yamaha, Verbatim/Mitsubishi Chemical, Dell and Thomson. This format is similar in functionality and compatibility to DVD-R General media and is intended for widespread playback on DVD-ROM drives and DVD-Video players. DVD+R drives write at up to 4X speed and provide a reliable, low-cost storage solution for archiving video, audio, images and other data.
|