User`s manual

100-M0171X3 77 of 95
GMS Inc. doing business as Cobham Tactical Communications and Surveillance
www.cobham.com/tcs
Implementation of the KLV Metadata meets standards set by the National Geospatial-Intelligence
Agency (NGA) Motion Imagery Standards Board (MISB). The KLV Metadata is input into the M2TE either via
embedding it in the VANC space of the HD-SDI/SDI input interface and/or the separate serial RS-422 interface.
Time Stamp Processing
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The Picture Timing SEI messages allow each Video frame to be assigned a time value. This time can represent
time of origin, capture or alternative ideal display. As such, it can be used to navigate to a frame with a
particular time.
The H.264 format, specified in ISO/IEC 14496-10 provides for an optional time stamp to be defined in the
Supplemental Enhanced Information (SEI) message. The picture timing SEI message (pic timing) specified
HH:MM:SS:FF IAW RP 0604 page 5. Additionally, the standard allows for
Auxiliary data to be associated with
a particular Video frame using the
Auxiliary Data Unregistered SEI Message. The primary M2TE time stamp
UTC#1 is inserted into the pic timing SEI element of the NAL packets in the H.264’s output stream. The
secondary M2TE time stamp UTC#2 is a 64 bit value indicating the number of microseconds since August 23
rd
1999 and is inserted into the unregistered user data SEI element.
Output Requirements
Serial Output
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The M2TE outputs MPEG-2 TS data with the following format:
 EIA-422 SSI Synchronous Serial Interface IAW EN 50083-9
 Output Video data rate from 128kbps to 10.7 Mbps 1 kbps resolution.
 The M2TE outputs an MPEG-2 compliant Transport Stream (TS) that not only contains H.264
compressed motion imagery, but also contains time-synchronized metadata and compressed Audio.
 The MPEG-2 TS output of either EIA-422 (constant bit rate) or Ethernet format operates at a bit rate
ranging from 128 kbps to 10.7Mbps adjustable in 1 kbps increments.
 The M2TE is able to operate with an external clock input from the RF communications data link as well
as with its own internal clock source.
Ethernet Streaming
The M2TE contains an IEEE 802.3u 10/100Base-TX Ethernet interface. The MPEG-2 TS can be encapsulated in
UDP/IP packets IAW RFC 3984. The M2TE is configurable to send Multicast IP packets without receiving a join
request.
RTP/UDP/IP and UDP/IP are the preferred protocols in transmitting multimedia data across networks that use
the Internet Protocol (IP). RTP (Real Time Transport Protocol) operates at the Application layer and relies on
User Datagram Protocol (UDP) at the Transport layer. It applies sequence numbers to indicate the order in which
packets should be assembled at their destination. UDP is preferable to the Transmission Control Protocol (TCP)
for real-time applications because it offers low-latency transport (less overhead) across IP networks.
Physical
Dimensions: 3.6” x 3.12” x 0.767”
(8.61 cu Inches)
9.14 cm x 7.92 cm x 1.91 cm
(13.83 cu cms)
Environmental:
Operational Temperature: -10˚C to +70˚C
(EXTERNAL COOLING REQUIRED)
Humidity: Up to 95% non-condensing