Snell Advanced Media MV-805, Руководство пользователя

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MV-805 IP Multiviewer User Manual IP Routing Terminology Terminology B.1
Issue1 Revision 1 Page 134 © 2018 SAM
Appendix B Terminology
B.1 IP Routing Terminology
Control network Typically an ethernet network dedicated for device control.
COTS Commercial Off-The-Shelf. Refers to hardware that is not specific to an
industry, but is generic and readily available.

In this case, it is high-performance IT switching equipment,.
Destination Receiver of one or more flows. Destination spigot.
Essence A general term used to describe a component of a media signal.

Video, Audio and Metadata are all essences.
Fabric Term for the networks that can make up a redundant network system,
Fabric “A” and Fabric “B”.
Flow Another term for an elementary IP stream, usually a sequence of
real-time data.
For example,

TR-03 describes how a media stream (e.g. an original SDI stream) may
be sent as three flows: Video, Audio and Ancillary essence data.
IEEE 1588

A Precision Time Protocol (PTP) to synchronize distributed clocks to
within 1 microsecond via Ethernet networks.
PTP runs on IP networks, transferring precision time to slave devices
via a 1 GHz virtual clock (time base). It is used to synchronize TR-03
elementary streams.
IGMPv3 Internet Group Management Protocol.

Communications protocol used in IP multicasting by client IP devices
and an IP router to establish multicast group membership.
The routing function of a traditional video router can be replicated with a
IP Network Router Controller deice and a COTS IP Switch which
supports the IGMPv3 protocol.
In-Band Control Sending control messages for an IP routing system in the media IP
network fabric.
IP Stream Real-time data (for example, video and/or audio) sent over a network.
IP Flow Flows form a stream. There may be Video and Audio IP flows in an IP
stream.
IP Router A device that connects networks together.
IP Switch A device that connects many network lines together. Many users can
communicate and more than one transaction can occur at a time on
network.
IP-RSC IP Routing System Controller (IP-RSC).

A unit used in a SAM video IP routing system. The unit controls a
high-performance IP network to form a (real-time) video IP routing
system.

It presents the system as a traditional video router to the outside world,
so that existing router control methods can be used to control an IP
Routing-based video router.
IPRA IP Router Adapter, a functional block within an IP-RSC.

The IPRA interfaces to the IP Routing system.
Table 29 Glossary of IP Routing Terms