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Glossary 59
PNG (Portable Network Graphics) A file format for images.
poster In QuickTime, a still image, usually a single frame from a movie, used to
represent the movie to users.
protocol A set of standards for sending and receiving information on a network.
QTSS (QuickTime Streaming Server) A technology used to deliver media over the
Internet in real time.
QuickTime Player An application that opens and plays QuickTime movies, as well as
many other kinds of files.
QuickTime Pro A version of QuickTime Player with advanced features, primarily the
addition of editing capabilities.
QuickTime VR A QuickTime media type with which users can interact with three-
dimensional places and objects.
reference movie A file that contains the location of one or more media files. A
reference file linked from a webpage, for example, can direct a QuickTime Player to the
version encoded for a particular connection speed.
RGB Red, green, blue; a way of representing colors onscreen.
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 digital
video.
sprite An image that is defined once and is then animated by commands that change
its position or appearance.
streaming Delivery of video or audio data over a network in real time, in packets
instead of in a single file download.
TIFF (Tagged Image File Format) A format for graphics, commonly used to transfer
bitmapped images between applications.
track A single data type in a QuickTime movie. A movie may contain one or more
tracks.
tween track A track that modifies the display of other tracks.
virtual reality (VR) The effect achieved by QuickTime VR, where users can manipulate
objects or environments.
wav A Windows format for sound files.