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ASI-IP-GTW User's Manual
Page 78
SDP: Session Description Protocol. A protocol to signal multicasts in a
network. SDP is used as a mechanism to describe an ongoing
multicast; for example the type of compression used, IP addresses etc.
SDTI: Serial Data Transport Interface. A mechanism that allows
transmission of various types of data over an SDI signal. This may be
one or more compressed video signals or other proprietary data types.
The advantage of SDTI is that existing SDI transmission infrastructure
can be used to transport other types of data.
SDTV: Standard Definition Television. The normal television
standard/resolution in use today.
SFP: Small Form-factor Pluggable module. A standardized mechanism
to allow usage of various optical interfaces for Gigabit Ethernet. Several
types of SFP modules exist: Single mode fiber modules for long-distance
transmission and multi mode fiber modules for shorter distances. SFP
is also known as "mini-GBIC".
SIP: Session Initiation Protocol. A common acronym for the ongoing
effort to standardize signalling over IP networks, i.e. connection setup
and tear-down. SIP makes it possible to "dial" a remote receiver of data
and set up the connection in this way.
SNMP: Simple Network Management Protocol. A fundamental and
simple protocol for management of network elements. Very common in
use today by most Network Management Systems and other
applications.
SNTP: Simple Network Time Protocol is an Internet protocol used to
synchronize the clocks of computers to some time reference. It is a
simplified version of the protocol NTP protocol which is too complicated
for many systems.
SPTS: Single Program Transport Streams. A Transport Stream that
contains a single program/ service.
TCP: Transmission Control Protocol. A protocol above the IP layer that
provides automatic retransmission of datagrams in case of packet loss,
making it very robust and tolerant against network errors. TCP is the
fundamental protocol used in the Internet for WEB traffic (HTTP
protocol). TCP is indented for point-to-point protocol; you cannot use
TCP for communication from one node to many others.
TCP/IP: A common term used for the Internet protocol suite, i.e. the set
of protocols needed to get fundamental IP network access: TCP, IP,
UDP, ARP etc.
ToS: Type of Service. This is a field in the header of IP datagrams to
provide various service types. It has now been "taken over" and reused
by DiffServ.
Transport Streams: The common name for MPEG2 Transport Streams.
A bit stream used to carry packets with MPEG-2 compressed video. A
transport stream typically carries approximately 10 compressed TV
channels, but can consist of an arbitrary number of TV and Radio
services.
UDP: User Datagram Protocol. A protocol above the IP layer that
provides port multiplexing in addition. In essence, you can transmit IP
data packets to several receiving processes in the same unit/device.