Under construction
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 Under construction Datagram: See packet. Data rate or data transfer rate: Amount of data moved over a period of time, such as 10MB per second. Often used to describe a hard drive’s ability to retrieve and deliver information. Also see bit rate. De-interlacing: The process, usually performed by video editing software, of removing interlacing from video originally intended for display on television monitors, in order to make it suitable for display on computer monitors. Delta frame: In inter frame (a.k.a. temporal) compression, periodic key frames store all the information that comprises a frame, while delta frames store only the information that changes from frame-to-frame in between key frames. Digital: In contrast to analog, digital representations consist of values measured at discrete intervals. Digital clocks go from one value to the next without displaying all intermediate values. Computers are digital machines employing a binary system, i.e., at their most basic level they can distinguish between just two values, 0 and 1 (off and on); there is no simple way to represent all the values in between, such as 0.25. All data that a computer processes must be digital, encoded as a series of zeroes and ones. Digital representations are approximations of analog events. They are useful because they are relatively easy to store and manipulate electronically. Digital rights management (DRM): Server software that protects against the illegal distribution (a.k.a. pirating) of copyrighted content over the Internet. Digitizing: Act of converting an analog audio or video signal to digital information. Download: The act of one computer requesting and receiving data, via a network, from another computer. Downloadable media: Media (i.e., video and/or audio) that can be downloaded and written to disk (i.e., saved onto a computer hard drive); typically refers to media files hosted on a Web server (as opposed to a media server) which can, and often must, be entirely downloaded and written to disk in order to be played (as contrasted to streaming media). DV: Generally refers to a digital video format that incorporates DV compression, the type of compression used by DV systems or by a DV camcorder that employs the DV format. A standard consumer DV camcorder uses mini-DV tape, compresses the video using the DV25 standard, and has an IEEE 1394 port for connecting to a desktop computer. The DV designation is also used to for a special type of tape cartridge used in DV camcorders and DV tape decks. DV25: The most common form of DV compression, using a fixed data rate of 25 megabits/sec. Dynamic media: Refers to design elements that incorporate motion and/or sound such as video, animation, and audio. Glossaire (PDF : 168 ko) |
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© DVcolor 2003 |
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