Blackmagic Design 2110 IP Manuel D'installation Et D'utilisation page 8

The switch needs to be Internet Group Management Protocol, or IGMPv3 enabled. IGMP is a
communication protocol that allows the switch to route multicast data.
With multicasting one stream can be subscribed to by multiple outputs while only using the
bandwidth of one single stream.
PTP Grandmaster
In order to maintain timing you need a Precision Time Protocol grandmaster or PTP clock
connected to the switch. Similar to using genlock via a master sync generator for synced SDI
connections, PTP generates accurate timing and frequency to maintain the packets of ST 2110
data over the network. This ensures that all streams are synchronized.
The PTP clock is the grandmaster and all other IP video devices should be set as the 'follower'
to ensure no timing conflicts can occur. For more information on setting your Blackmagic 2110
IP converter as a follower, refer to the 'setup menu' later in this manual.
NMOS Controller
Traditional SDI connections send signals in one direction with video, audio and ancillary
data such as timecode and closed captions embedded in the one signal.
With ST 2110, the signal is split into video, audio and ancillary data elementary streams. This provides
flexibility to route video, audio or ancillary data streams independently whilst keeping each essence
stream synchronized so they can be brought back together at the end of the workflow.
This is all achieved through timing. But how does one converter know what the other converter is
doing? This is where the Networked Media Open Specifications, or NMOS for short, is important.
NMOS is a group of specifications that direct the flow of traffic in an IP network and manage
communications between all the endpoint devices. Once a hardware or software NMOS controller
is connected to the network you can route any or all of the elementary streams to any endpoint
device on the network.
Blackmagic Ethernet Switch 360P, Videohub Master Control Pro and Videohub Smart Control
Pro can all be used as NMOS controllers for 2110 IP networks.
CAM VTR MON CPU EDIT
1 2 3 4 5
CAM 1 CAM 2 CAM 3 CAM 4 CAM 5
VTR 1 VTR 2 VTR 3 VTR 4 VTR 5
MON DECK EDIT ATEM M/VIEW STREAM CAM ST/C
1 2 3 4 5 6 7 8
6 7 8 9 0
CAM 6 CAM 7 CAM 8 CAM 9 CAM 10 CAM 11 CAM 12 CAM 13
VTR 6 VTR 7 VTR 8 VTR 9 VTR 10 VTR 11 VTR 12 VTR 13
PC MAC IN CLEAR
9 0 OUT TAKE
SRC CLEAR
LEVEL DEST TAKE
CAM 14 CAM 15 EDIT 1 EDIT 2 EDIT 3 EDIT 4 EDIT 5 EDIT 6
VTR 14 VTR 15 EDIT 7 EDIT 8 EDIT 9 EDIT 10 EDIT 11 EDIT 12
Using an Ethernet Switch
MENU
SET
LOCK
MON MON MON
1 2 3
TECH
EDIT 1
MON
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