Glossary
Numerics A B C D E F G H I J L M N O P
Q R S T U V W Y
© 2011 Harmonic Inc. 204 ProView 7000 v.2.4, Rev. A
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. See also
DOM .
DSLAM
Digital Subscriber Line Access Multiplex.
DTE
Data Terminal Equipment. A device that communicates with a DCE device over TIA-232 . 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 PES packet header
to indicate the time the access unit is decoded in the system target
decoder .
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.
DVB-ASI
DVB Asynchronous Serial Interface. A 270 Mbps serial interface to carry MPEG-2 Transport
Stream.
DVB-CI
Digital Video Broadcasting – Common Interface
DVB-S
Digital Video Broadcasting - Satellite.
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