Harmonic Electra9200 - Divitrack Features; Divitrackip Support

Chapter 4 Electra 9200 Specifications DiviTrack Features
© 2015 Harmonic Inc. All rights reserved. 34 Electra 9200, Rev O
DiviTrack Features
DiviTrackIP Support
DiviTrackIP statistical multiplexing provides high-performance video compression when
multiple channels share a specified bandwidth. The system maintains the overall pool
bandwidth at a constant bit rate while allocating to individual channels the optimum number
of bits on a frame-by-frame basis, driven by picture complexity information from the
LookAhead™ analysis. By assigning priorities, you can specify channels that must maintain a
high quality when stress on the system increases.
The Electra 9200 encoder works in conjunction with NMX and a ProStream™ 1000 to
support DiviTrackIP. The ProStream 1000 analyzes the complexity of all incoming video
streams and sends messages to the encoders through the IP network. All streams from an
Electra 9200 encoder must be sent to the same ProStream 1000. MPTS (multiple STC clocks
per chassis) is also supported.
Table 4–9 provides DiviTrack IP pool specifications. See the NMX help for information about
configuring DiviTrackIP.
Forward Error Correction
(FEC)
Column-only SMTE 2022-1 and -2 forward error correction
(FEC). FEC provides lost packet recovery at the receiving
devices.
Table 4–9: DiviTrackIP Pool Specifications
Parameter Description Comments
Supported Multiplexer ProStream™1000
Max number of DiviTrack Pools
fed per Electra 9200
8 Maximum bit rate is
200Mbps per Electra
chassis
Maximum number of
DiviTrackIP pools per
ProStream 1000 IP-MUX
8 Max 3 pools per MPTS
Max services per pool 64
Maximum number of VBR
services per ProStream 1000
MUX
64 across 3 pools Max ASI output rate of
ProStream 1000 MUX is
160Mbps
Round-trip Delay 300msec
Priorities Very Low
Low
Medium
High
Very High
For SD MPEG-2 only
Table 4–8: IP (GbE) Output
Feature Support