Glossary
260
IP (Internet Protocol) —
commonly used protocol for transferring data over the Internet. Most
networks combine IP with a higher-level protocol called Transport Control Protocol (TCP).
Streaming servers use either Microsoft Media Server (MMS), Real-Time Protocol (RTP) or Real-
Time Streaming Protocol (RTSP).
ISDN —
moderate speed connection to the Internet. Theoretical throughput is either
approximately 8 KBytes/sec or 16 KBytes/sec depending on configuration.
ISO (International Organization for Standardization)
—
A network of national standards
institutes from countries working in partnership with international organizations,
governments, industry, business and consumer representatives.
ISP (Internet Service Provider) —
company that provides Internet related services, often including
connectivity, e-mail accounts and Web hosting. Increasingly, ISPs are starting to offer video
hosting.
JPEG —
graphic format developed by the Joint Photographic Experts Group. JPEG is a lossy bit-
mapped image format that is widely used for online graphics. JPEG works well for
photographic images. (PNG works better for flat color illustrations.)
Keyframe —
In the context of this manual:
spatially compressed frame that contains the complete video image and is the basis for the
following delta frames. See also
Intraframe
.
EventStream event that requests a keyframe to be inserted at a specific time during a
QuickTime or Real 10 movie.
kHz (kiloHertz) —
audio frequency unit measured in thousands of cycles per second.
kilobit (kb) —
1000 bits. The term
kbits/sec
(with a lowercase “k” and “b”) is short for kilobits
per second, a unit of data rate measurement frequently used in reference to audio data rates
and telecommunications.
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