Technical information

76 Glossary
QTSS QuickTime Streaming Server. A technology that lets you deliver media over the
Internet in real time.
QTSS Publisher An Apple application (included with Mac OS X Server version 10.3 and
later) for managing QuickTime media and playlists, and preparing media for streaming
and downloading.
QuickTime A set of Macintosh system extensions or a Windows dynamic-link library
that supports the composition and playing of movies.
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.
RAID Redundant Array of Independent (or Inexpensive) Disks. A grouping of multiple
physical hard disks into a disk array, which either provides high-speed access to stored
data, mirrors the data so that it can be rebuilt in case of disk failure, or both of these
features. The RAID array is presented to the storage system as a single logical storage
unit. See also RAID array, RAID level.
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 webpage, 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.
relay In QuickTime Streaming Server, a relay receives an incoming stream and then
forwards that stream to one or more streaming servers. Relays can reduce Internet
bandwidth consumption and are useful for broadcasts with numerous viewers in
different locations. In Internet mail terms, a relay is a mail SMTP server that sends
incoming mail to another SMTP server, but not to its final destination.
relayed stream A stream that’s passed from one server to one or more other servers.
Relays can also be used to generate a multicast stream. QTSS doesn’t support relaying
of MP3 streams.
RTP Real-Time Transport Protocol. An end-to-end network-transport protocol suitable
for applications transmitting real-time data (such as audio, video, or simulation data)
over multicast or unicast network services.