Network Electronics SDI-IP-GTW, Руководство пользователя

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SDI-IP-GTW User Manual
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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.
Unicast:
Point-to-point connection, i.e. the "opposite" of multicast
which is one to many (or many to many). In this mode, a transmit unit
sends video data direct to a unique destination address.
VLAN:
Virtual LAN, a network of units that behave as if they are
connected to the same wire even though they may actually be
physically located on different segments of a LAN.
Watermarking:
A mechanism to "stamp" video content with unique
marks, making it possible to trace the origins of illegaly distributed
content. The marks are invisible for the viewer.
XML:
eXtensible Markup Language. A very common self-describing
text-based data format. Used for many purposes: Meta-data,
configuration files, documents, etc. The readability of the format has
made it very popular and is now the fundament for many types of WEB
services.