Apple QuickTime Informations techniques télécharger pdf (Page 78)

78 Glossary

tween track A track that modifies the display of other tracks.

UDP User Datagram Protocol. A communications method that uses the Internet

Protocol (IP) to send a data unit (called a datagram) from one computer to another in a

network. Network applications that have very small data units to exchange may use

UDP rather than TCP.

unicast The transmission of data to a single recipient or client. If a movie is unicast to a

user using RSTP, the user can move freely from point to point in an on-demand movie.

URL Uniform Resource Locator. The address of a computer, file, or resource that can be

accessed on a local network or the Internet. The URL is made up of the name of the

protocol needed to access the resource, a domain name that identifies a specific

computer on the Internet, and a hierarchical description of a file location on the

computer.

VBR Variable bit rate. A method of compressing data that takes advantage of changes

in the media’s data rate.

wav A Windows format for sound files.

webcast A broadcast of live video or audio on the Internet.

XLR plug A three-pin audio connector that can be used with three-wire balanced

cables, which cause electromagnetic interference to be canceled out.

XML An extensible markup language, similar to HTML but more formal and more

flexible.

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Apple QuickTime Informations techniques Page 78