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74 Glossary
QuickTime Player An application, included with the QuickTime system software, that
plays QuickTime movies.
QuickTime Pro A version of QuickTime Player with advanced features, primarily the
addition of editing capabilities.
R
RAID (Redundant Array of Independent Disks) A hard disk array that either increases
the speed of disk input-output or mirrors the data for redundancy, or provides both of these
features. Users may access the RAID as if it were one drive, although it may be divided into
multiple partitions.
reference movie A .mov file created using a utility program like MakeRefMovie, available
at no cost from Apple for Macintosh and Windows. The file contains the location of a
streaming media file and can also contain the locations of multiple streaming files. A
reference file linked from a web page, for example, can direct a client player to the on-
demand presentation encoded for its particular connection speed.
reflected stream A live broadcast delivered as a unicast stream. Movie and MP4 playlists
also generate reflected streams.
relayed stream A stream that is passed from one server to one or more other servers.
Relays can also be used to generate a multicast stream. QTSS does not support relaying of
MP3 streams.
RTP (Real-Time Transport Protocol) A network-transport protocol used for
transmitting real-time multimedia content over multicast or unicast network services.
RTSP (Real Time Streaming Protocol) A protocol for controlling a stream of real-time
multimedia content. Sources of data can include both live feeds and stored clips.
S
sample rate The number of samples per second used for audio. Higher sample rates yield
higher quality audio than lower sample rates.
SDP (Session Description Protocol) A text file used with QuickTime Streaming Server
that provides information about the format, timing, and authorship of a live streaming
broadcast and gives the user’s computer instructions for tuning in.
SMTP (Simple Mail Transport Protocol) A protocol for sending email.
sprite An animated image that is managed by QuickTime. A sprite is defined once and is
then animated by commands that change its position or appearance.
SSL (Secure Sockets Layer) An Internet protocol that allows you to send encrypted,
authenticated information across the Internet.
LL0329.book Page 74 Wednesday, November 20, 2002 2:09 PM