Chapter 4 Electra 9200 Specifications
Closed Captions Support
© 2015 Harmonic Inc. All rights reserved.
35
Electra 9200, Rev O
DiviTrackMX Support
The Electra 9200 encoder supports DiviTrackMX. DiviTrackMX™ statistical multiplexing
technology is integrated into the Electra 9200, allowing operators to deliver highly efficient
VBR services without the need for any additional equipment.
Closed Captions Support
The CEA-708/608 captions include space for CEA-608 data and the encoder can receive
them either via serial port (SMPTE 333M compliant, one service per chassis) or in VANC
(SMPTE 334-1 compliant, one service per encoder card mounted). The Electra™ 9200 also
supports VANC-708/CEA-708 ATSC (SMPTE334/A53). For a complete list of closed caption
resolutions see the NMX online help.
Japanese Standard Closed-Captions Support
The Electra™ 9200 provides support for Japanese standard captions as well as the existing
support for CEA-708 captions via SMPTE 333 and SMPTE 334-1 inputs. The Electra™ 9200
encoder supports the closed-caption feature where the closed-caption data is generated
within the ancillary data space and is extracted by the encoder for processing. The Vertical
Ancillary Data Space (VANC) packets also adhere to the ARIB STD-B37 standard (Structure
and Operation of Closed Caption Data Conveyed by Ancillary Data Packets).
Digital Program Insertion Support
The Electra 9200 encoder supports digital program insertion (DPI). Electra 9200 accepts
external automation system DPI commands (triggers) via Ethernet. These commands are sent
via the SCTE 104 protocol, and result in the encoder (as well as the NMX DPI server) placing
SCTE 35 DPI messages in the outgoing MPEG Transport Stream (TS).
NOTE:
This encoder also accepts commands via SCTE 104 protocol embedded in the VANC. DTMF and
Contact Closure (back panel connector) can also be used to trigger DPI.
The resulting messages carry metadata used by downstream content insertion equipment to
choose and insert the proper content. When using an external automation system, that
system provides the metadata values via the SCTE 104 commands. The metadata is included
in the resulting SCTE 35 messages, which are placed in the outgoing MPEG Transport Stream.
HHP Support
Harmonic Heartbeat Protocol (HHP) is a proprietary Harmonic protocol used to prevent
duplicate IP output after a redundancy switch and to initiate a redundancy switch in some
1×1 hot backup scenarios. HHP packets are sent over a unique multicast address on the
video IP network.
In some redundancy switches, NMX may not be able to shut down the IP output from the
primary device. For example, if the connection between the device and NMX is lost, NMX
issues a time-out alarm for the device and provisions the backup device with the circuits from
the primary device. However, the primary device may still be operating normally even though
it lost communication with NMX. In this case, you now have two devices sending the same
output.
Содержание Electra9200
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