Harmonic ELECTRA VS, User Manual

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Glossary
600 Electra VS - Version 05.10
User Manual - Rev. A
RU Rack Unit. It is a unit of measure used to describe the height of equipment
intended for mounting in a 19-inch rack or a 23-inch rack. One rack unit is
1.75 inches (44.45 mm) high.
Scrambling Alteration of the characteristics of a television signal in order to prevent
unauthorized reception of the information in clear form.
SBR Spectral Band Replication.
SBR is a tool used in HE-AAC for broadcast transmissions.
SD Standard Definition.
SD-SDI 270 Mbps Standard-Definition Serial Digital Interface.
SDI Serial Digital Interface.
SDTV Simple Definition Television.
SID Slide-out System Insight Display.
Active Health Indicator provided by HP on the front panel of their 1RU
server to indicate equipment status.
SMPTE Society of Motion Picture and Television Engineers.
A Standards Organization devoted to advancing theory and application in
motion imaging, including film, television, video, computer imaging, and
telecommunications.
SNMP Simple Network Management Protocol.
SNMP provides a means to monitor and control network devices, and to
manage configurations, statistics collection, performance, and security.
SNMP network management is based on the client and server model. Each
managed host runs a process called an agent. The agent is a server
process that maintains the Management Information Base (MIB) database
for the host. SNMP uses ports 161 and 162.
SPTS Single Program Transport Stream
StatMux Statistical Multiplexing
Statistical multiplexing is a proven technique used to dynamically assign
compression bitrates based upon video complexity and motion
requirements of individual channels. The principle of statistical
multiplexing is that a group or “pool” of encoders shares a fixed quantity
of bandwidth. The bandwidth is allocated on a frame by frame basis by a
centralized controller so the encoder with the most complex video is
allowed to borrow more bandwidth from the pool of encoders with less
difficult video.
STB Set-Top Box.
A device that provides access to the Broadband broadcast or Internet and
displays information on a TV screen.
TCP Transmission Control Protocol.
One of the main protocols in TCP/IP networks. TCP enables two hosts to
establish a connection and exchange streams of data. TCP guarantees
delivery of data and packets, and will be delivered in the same order in
which they were sent. While IP takes care of handling the actual delivery
of the data, TCP takes care of keeping track of the individual units of data
(called packets) that a message is divided into for efficient routing through
the Internet.