Glossary
© 2013 Harmonic Inc.
377
Ellipse 3000 r.3.0, Rev. B
DOM
A card for the MN20 multiplexer which. transmits MPEG-2
packets over
an
interface with a
physical interface.
downconverter
A device used to lower one or more high-frequency signals to an intermediate range.
See
also
downstream
The direction of the communications service data flow. Broadcast services flow downstream
from the service provider to the subscriber.
DPI
Digital Program Insertion. Also referred to as Splicing, is the process in which the main feed is
spliced to allow the insertion of another stream, usually an ad.
DRM
Digital Rights Management.
DS3
A North American telephony interface standard, which operates at 44.736 Mbps over 75-ohm
coaxial cable.
.
DSLAM
Digital Subscriber Line Access Multiplexer.
DTE
Data Terminal Equipment. A device that communicates with a DCE device over
. For
example, a DTE is a computer that sends to and accepts data from a modem (DCE).
DTS
Decoding Time Stamp. An MPEG-2 defined field that can be present in the
packet header
to indicate the time the access unit is decoded in the system target
DTV
Digital Television.
dual channel
A channel that consists of two audio signals that are not related to each other, for example,
the English and Japanese translation of a program’s audio.
DVB
Digital Video Broadcasting project of the EBU. Specifies transmission and related standards
for Europe (primarily) as well as other parts of the world.