1080i - 1080 lines of interlaced video with 1920 x 1080 resolution in 1.78 aspect ratio.
1080p - 1080 lines of progressive video with 1920 x 1080 resolution in 1.78 aspect ratio.
cDVD - DVD-Video content stored on a CD (or CD-R/RW).
Disc - Term commonly used to refer to optical storage devices such as DVD and CD.
DVD - Digital Versatile Disc. The audio/video/data storage system based on 12- and 8-cm optical discs. There are a number of different standards for DVD media, such as DVD Video, DVD Audio, DVD recordable, and so forth. There are also a two conflicting standards for consumer DVD recordable media: DVD- and DVD+.
DVD A - The audio-only format of DVD. Has an optional subset of DVD-Video features.
DVD-Multi – A DVD Forum-sponsored logo to identify DVD products, players and recorders that support DVD-R, DVD-RW, and DVD-RAM formats.
DVD Player - Either a consumer electronics hardware product designed to connect to a television set to play back DVD movies (a set-top DVD player) or a computer software application that plays DVD movies from a computer DVD drive (a DVD player application). See also DVD recorder.
DVD-R - DVD Recordable. A version of DVD through which data can be recorded once. The DVD Forum-defined write-once DVD format.
DVD+R - Alternate DVD Recordable write-once format developed by the DVD+RW Alliance.
DVD-RAM - DVD Random-Access Memory. A version of DVD through which data can be recorded more than once. DVD-RAM is designed to be written more than 100,000 times.
DVD-ROM - DVD Read-Only Memory. Stands for read-only memory, referring to the fact that standard DVD-ROM and DVD-Video discs can’t be recorded on. A DVD-ROM can store essentially any form of digital data. The base format of DVD.
DVD-RW - DVD ReWritable. The DVD Forum-defined, re-recordable DVD format. Like CD-RW, rewritable discs can be reused, but are more expensive than recordable, and are less compatible with set-top players.
DVD+RW - Alternate DVD ReWritable format developed by the DVD+RW Alliance, an industry consortium developed the alternate recordable DVD formats, DVD+R and DVD+RW (‘DVD plus’).
DTS-ES - A version of DTS decoding that is a discrete variation of DTS encoding and decoding and carries a discrete rear centre channel instead of a matrixed channel.
DTS - Digital Theater Sound. A perceptual audio-coding system developed for theaters. An optional audio track format for DVD-Video and DVD-Audio.
DTV - Digital television as proposed by the digital TV standard put forth by the Digital TV team founded by Microsoft, Intel, and Compaq.
DVD-VR - DVD Video Recording. A modified form of the DVD format used to provide enhanced recording capabilities on some DVD-RW video recorders.
DVD-Video (DVD-V) - A standard for storing and reproducing audio and video on DVD-ROM discs, based on MPEG video, Dolby Digital and MPEG audio, and other proprietary data formats.
DVI (Digital Visual Interface) - The interface standard developed by the Digital Display Working Group.
DVS - Descriptive video services. Descriptive narration of video for blind or sight-impaired viewers
Hybrid DVD -- A general term for a DVD-Video disc that contains both video and computer content.
Megabyte – or MB. 1,000,000 bytes.
Mbps - Megabits/second. Millions (106) of bits per second.
MPEG - Motion Pictures Expert Group compression methods for video, graphics, or audio information.
MSF - Minute-Second-Frame addressing, used with data and audio discs.
Multimedia - Integration of more than one form of media, such as text, graphics, audio, video, animation, and computer data.
Multisession - Multiple recording sessions, to which additional sessions are appended to the CD. When data is linked between sessions, all data is seen as part of a single logical structure.
Multisession CD - A CD that has been written to multiple times with each use creating a new session on the disc.
Multi-Story DVD - A DVD production with an alternate version of the same program material, accessed through user- and program-controlled conditional branching.
Perceived Resolution - The resolution of a display from the observer’s point of view.
Perceptual Coding - Compression techniques based on the study of human perception. Aims to identify and remove information that is least likely to be missed by the average human observer.
Title - The largest unit of a DVD-Video disc. Can hold up to 99 titles, which can be selected from the disc menu.
Title Key - A value used to encrypt and scramble user data on DVD-Video discs.
USB - Short for ‘Universal Serial Bus’, a USB drive is an external hardware which supports data transfer rates of 12 Mbps. A single USB port can be used to connect up to 127 peripheral devices, such as promotional usb, mice, modems, and keyboards.
Web DVD - A DVD-Video disc with web-enhanced DVD content. May include web pages that combine local DVD video with current online content, or dynamic links from the DVD playback to online web content.
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