Selenio
TM
BNP User Guide, Release 3.7.1
274
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T
TFTP
Trivial File Transfer Protocol. TFTP uses
and is often used by servers to boot
diskless workstations, X-terminals, and routers.
TS
Transport Stream, the result of multiplexed--or combined--audio, video, or other data
content that is packaged and transmitted through the broadcast network.
TVCT
A Terrestrial Virtual Channel Table is a mandatory PSIP table that lists all the virtual
channels available in an ATSC transport stream, and optionally, virtual channels
available in other ATSC transport streams.
U
UDP
User Datagram Protocol. A connectionless protocol that runs on top of IP networks.
UDP provides a direct way to send information over an IP network. It is used primarily
for broadcasting messages over a network.
V
VBI
Vertical Blanking Interval. A portion of a television signal that carries non-audio/video
data, such as closed-caption text.
VBR
Variable Bit Rate. VBR streams vary in bandwidth over time.
VCT
Virtual Channel Table, part of 9 tables in the ATCS PSIP. The VCT contains a list of all the
channels that are or will be online, along with their channel name and number. This
table contains the set of data that enables a receiver to tune and locate the service
being broadcast.
VOD
Video-on-Demand. Video-on-demand systems allow users to watch video content
over a network as part of an interactive television system, either by streaming or by
download.
X
XFP
10 Gigabit Small Form Factor Pluggable (
). The XFP is a pluggable, hot-swappable
optical interface for 10 Gigabit SONET/SDH, Fibre Channel, Gigabit Ethernet, and other
applications. XFP modules are optical transceivers, typically 1310nm or 1550nm.
Optical XFPs include digital diagnostics.
STP
Strip Processor. The STP modules (NP and ASI) is one of the units that comprise the
BNP.
STT
System Table Time. Allows a broadcaster to present time indicators to the consumer,
ensuring that the time is synchronized.
SVOD
Subscription-Video-on-Demand. This is a Video-on-Demand service offered by
subscription, providing viewers with access to select programs from the libraries of
featured cable networks.
