User guide

4Sight 131
Administrator Guide
Versi o n 3 . 1
Glossary
ADSL
Asymmetric Digital Subscriber Line.
bandwidth
Bandwidth has many meanings, depending on context. It started as a
radio term and has been expanded to include other kinds of
communications. It is the numerical difference between the highest
and lowest frequencies of a radio band or channel.
Bandwidth means the same thing in audio, although in most
applications, the lowest frequency is sufficiently low enough to be
considered equal to zero. Hence, audio bandwidth usually means the
highest frequency of an audio signal or the highest frequency that can
be carried by an audio system.
BIFS
Binary Format for Scene. A set of nodes, based on VRML, that make
it possible to combine 2D and 3D graphics, natural and synthetic
sound, audio and video information, and stored and streamed
material in one environment.
bit rate
The rate for transmitting data over a network. Envivio products use
several bit rates. The channel capacity is the limit of the network. The
maximum bit rate is a limit, less than the channel capacity, that the
fitter uses to fit data into the actual bandwidth for a streaming server.
The audio encoder uses an average bit rate and a maximum bit rate for
variable bit rate encoding.
broadband
A general term for DSL, cable modem, and T1 lines.