Glossary
© 2013 Harmonic Inc.
399
Ellipse 3000 r.3.0, Rev. B
TIA-485
A
TIA
standard interface for multipoint serial communications. It supports several types of
connectors, including DB-9 and DB-37. TIA-485 can support more nodes per line than
TIA-232
.
TOT
Time Offset table.
topology
In NMX, a graphical representation of the components that comprise a broadcast encoding
system (environment). Icons represent the various components. Lines between components
indicate physical connections.
tp
transponder
transport
In NMX, a transport is a submap that exists within the main submap. It contains a collection
of components and external devices as well as channels and circuits. The function of a
transport is to contain a collection of Harmonic components, input devices, output devices,
and links, and to provide access to the programs and circuits associated with that transport.
Transport Stream
One or more multiplexed compressed programs, typically containing video, audio, and
associated data. Defined by MPEG-2 Systems (ISO/IEC 13818-1), it can transport a wide
variety of video and audio compression formats.
TS
Abbreviation for Transport Stream, defined by MPEG-2 Systems (ISO/IEC 13818-1)
TS packet
MPEG-2 Transport Stream packet. The basic unit of an MPEG-2
. Each packet
is 188 bytes, which includes a 4-byte header.
U
UDP
User Datagram Protocol. A connectionless protocol that relies on IP transport. Unlike TCP/IP,
UDP/IP provides no error recovery services, offering instead a faster way to send and receive
datagrams over an IP network.
UDP port
User Datagram Protocol used with GbE interface.