Glossary
89
Streaming:
The act of transferring compressed video and audio files over the
Internet. Streaming does not download all the data at once, but downloads it in
stages using a store-and-forward method. The data does not arrive as a
continuous file, but is cached in the buffer, which can create delays at the start
of transmission. The data can be transmitted live or it can be downloaded later.
The computer receiving the data stream must have a program (player) installed
on it that decompresses the data. Players are usually installed in browsers such
as Internet Explorer. The speed and quality of the data depend heavily on how
much bandwidth is available. In order to ensure smooth playback, the Internet
connection should offer at least 300 Kbps in bandwidth. There are various file
formats for audio and video streaming. The most popular formats are MP3,
RealAudio and WMA.
SVCD:
Expanded Video-CD standard. This image format offers a higher line
resolution and uses MPEG-2 instead of MPEG-1 to compress the video data.
(see also "VCD")
T
TIF:
Abbreviation for "Tagged Image File Format". Standard format for
professional printed images developed by Aldus.
V
VCD:
Abbreviation for "Video CD". A standard for writing MPEG-1-formatted
videos to CDs. A Video CD can hold up to an hour of digital video and stereo-
quality sound. The data rate of the MPEG-1 stream is constant - around 170 kB
per second (224 kpbs sound, 138 kB video, PAL). This standard offers image
and sound quality that is comparable to that of a HiFi VCR. (see also "SVCD")
VHS:
Abbreviation for "Video Home System". System used by many VCRs for
recording and playing back sound and video from magnetic tape. It uses a
composite signal that combines brightness and color information into one signal.
(see also "Composite Video", S-VHS)
Video-on-Demand (Vod):
A multimedia application that allows users to access
a video server and view photos/images or videos/movies.
Video for Windows:
Video for Windows, a Microsoft Windows system
expansion, allows users to record, store and play back digital video sequences.
(see also "AVI")
W
Web Server:
A computer on which HTML pages and network software are
stored. Web servers constantly deliver content via the Internet or a network to
Web browsers, where it is displayed on the user's monitor.
Summary of Contents for MEDIACENTER
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