Glossary
© 2013 Harmonic Inc.
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Ellipse 3000 r.3.0, Rev. B
the system and then the output of each device in the chain is checked in turn versus the
nominal level. This is an analog concept and measurement. The setting permits the encoder
to adjust its gain structure to ensure that the resulting digital audio level for a sine-wave tone
at Reference Level will be 20 dBFS.
In the digital domain the Facility Reference Level should be equivalent to -20 dBFS (decibels
below Full Scale) per SMPTE RP155.
Reference Service
An input service that its content is streamed via an output service. The output service is
automatically updating according to changes detected in the specific input service.
relay
An electrical switch that allows a lower voltage to control a higher one. A small current
energizes the relay, which closes a switch, allowing a large current to flow through.
remultiplexer
A component that multiplexes several MPEG-2 SPTS input streams into a single MPTS output
stream.
RFD
Repeat Field Detection. A capability to detect field or frame repeats in video signals where
the original source was film and is presented in a
cadence. This process, defined
by MPEG video, saves bits by sending the encoded pictures at their original 24 Hz frame rate.
This is sometimes called
inverse telecine
.
RJ-45
Also RJ45. An eight-wire connector such as an
Ethernet
connector.
See also
RMX module
A card for the MN20 multiplexer which accepts up to four M2S inputs from Harmonic
components. An RMX module multiplexes these inputs with other MPEG-2 transport streams.
roll-off factor
The amount of
used in excess of the baud rate.
route group
Route group (RG) is a group of NMX servers. It supports the engineering NMX system (also
know as the backup route group). Every object in a route group has its own unique ID.
Duplicate ID’s may exist across route groups (for example, between primary route group and
a backup route group).
RSVP
Resource Reservation Protocol
RTSP
Real Time Streaming Protocol