Autodesk 64006-051108-9001 - Discreet Cleaner - Mac User Manual page 281

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UDP (User Datagram Protocol) — data transmission standard used by realtime transfer protocol
for broadcasting data over IP networks. UDP is designed for realtime broadcast, and thus lacks
many of the error correction features of TCP, because there isn't time to resend lost data. This
means that UDP may lose data in transmission if there are problems with the network.
Unicast — delivery of a unique stream to each viewer. Because each viewer initiates a new
stream when viewing the same source, this approach to media delivery can result in increased
network congestion as multiple, identical streams are sent at the same time.
Upload — to move a file from a computer to a server.
URL (Uniform Resource Locator) — global address of documents, pages, and other resources on
the World Wide Web.
Variable Bitrate (VBR) Encoding — a process of compressing movies to a changing, optimal data
rate. Produces movies with data rates that vary instead of being uniform, flat data rates.
Variable Frame Length Movie — movie that contains frames that are not all of equal duration.
Supported by QuickTime, Real 10 and Windows Media, but not AVI.
Vector — in multimedia, formats that store graphical information as mathematical algorithms
instead of pixels. These images don't have any pixels, but are equations describing the objects
portrayed. Vector images scale perfectly to larger and smaller sizes. Illustrator files, Flash and
QuickTime curve media are vector formats.
Vertical Edge Blanking — see Edge Blanking.
VCD (Video Compact Disc)— a compact disc that contains moving pictures and sound.
Video for Windows — also called AVI, Microsoft's initial multimedia architecture primarily
aimed at CD-ROM video. Replaced by DirectShow and Windows Media.