Glossary
Reflex™
An Ericsson AB proprietary system to provide efficient use of
bandwidth by a set of encoders without sacrificing picture quality. A
group bit rate is allocated to a set of Encoders and the bit rate for
each encoder is allocated according to the requirements of the
picture encoding process.
The bit rate allocation can be performed externally by a multiplexer,
or internally in a unit fitted with multiple VCM’s.
RF
Radio Frequency.
RGB
Red, Green, Blue: The Chroma information in a video signal.
RIP2
Routing Information Protocol v2. A protocol used between network
routers to exchange routing tables and information.
ROM
Read Only Memory: A non-volatile storage device for digital data.
Data has been stored permanently in this device. No further
information may be stored (written) there and the data it holds
cannot be erased. Data may be read as often as required.
RS
Reed-Solomon coding: An error detection and correction, coding
system. 16 bytes of Reed-Solomon Forward Error Correction code
are appended to the packet before transmission bringing the packet
length to 204 bytes. The 16 bytes are used at the receiving end to
correct any errors. Up to eight corrupted bytes can be corrected.
RSVP
ReSerVation Protocol. A Quality-of-service oriented protocol used
by network elements to reserve capacity in an IP network before a
transmission takes place.
RTP
Real-time Transfer Protocol. A protocol designed for transmission of
real-time data like video and audio over IP networks. RTP is used
for most video over IP transmissions.
RLC
Run Length Coding: Minimization of the length of a bit-stream by
replacing repeated characters with an instruction of the form ‘repeat
character x y times’.
SBR
Spectral Band Replication.
SCPC
Single Channel Per Carrier.
Spectral
Scrambling
A process (in digital transmission) used to combine a digital signal
with a pseudo-random sequence, producing a randomized digital
signal that conveys the original information in a form optimized for a
broadcast channel.
Scrambling
Alteration of the characteristics of a television signal in order to
prevent unauthorized reception of the information in clear form.
SDI
Serial Digital Interface.
SDT
Service Description Table: Provides information in the SI stream
about the services in the system; for example, the name of the
service, the service provider, etc.
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