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D |
| Data Rate: |
The rate at which bits of information are transmitted
per second. |
| Database: |
A collection of data. |
| Dial-Up Access: |
When computer devices hook up to a network via
modem and public phone system on a pay-per-time
basis. Usually dial-up connections offer limited
bandwidths. The alternative to a dial-up connection
is a leased line that offers continuous access at
a constant bandwidth to a network. |
| Digital: |
An electronic technology that generates, stores,
and processes data in terms of two states: positive
and non-positive. Positive is expressed or represented
by the number 1 and non-positive by the number 0.
Data transmitted or stored with digital technology
is expressed as a string of 0's and 1's. Each of
these state digits is referred to as a bit (and
a string of bits that a computer can address individually
as a group is a byte). Before Digital technology
evolved there was analog. |
| Digital Video: |
Digital video is the key to content when streaming
media. Digital video is an alternative way of storing
or distributing video. Digital video is usually
converted from an analog video source. A digital
video signal is represented in '1's and '0's, whereas
an analog video signal is represented by a fluctuating
voltage signal that is stored on magnetic tape.
This difference is similar to the difference between
analog audio and digital audio. |
| Digitizing: |
Process of capturing or "bringing in"
audio and/or video (usually analog source tapes
such as Beta SP, 3/4, VHS, etc.) into a computer.
Digitizing is made possible by video hardware, a
computer hardware card, cables, and a software application
that all work together to convert the original signal
into digital media. This digital media can then
be edited and transferred back to numerous formats
for Internet streaming, CD-Rom, DVD, and other forms
of distribution. |
| DSL: |
A general acronym relating to Digital Subscriber
Lines. The two main types of digital subscriber
lines are ADSL (Asynchronous) and SDSL (Synchronous).
DSL technologies use sophisticated modulation schemes
to pack data onto copper wires. They are also known
as 'last mile' technologies because they are used
to connect only between telephone switching stations
to a home or office, not between switching stations. |
| DSP: |
Digital Signal Processor - a chip optimized to
perform repetitive mathmatical calculations, such
as encoding and decoding. A DSP normally consumes
less battery power due to its specialized nature. |
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