Adtec RD-71 User Manual page 72

IP Tx Mode​ - ​ I P Tx Mode controls the protocol used for transmitting a transport stream
over IP. UDP / RTP or TCP. More information can be read about these in the ​ I P section​ .
RTP​ - ​ R TP allows for sequence numbering and timing, which are crucial for the accurate
playback of an audio or video data stream.
Note:​ This field may be edited if Multicast Mode is set to SEND and IP Tx Mode is set to
UDP/RTP.
Multicast IPA​ - ​ T he IP Address of which the Multicast or Unicast is broadcast. Multicast
addressing supports the transmission of a single IP datagram to multiple receivers. Valid
Multicast addressing range is 224.10.XXX.XXX to 239.XXX.XXX.XXX. Unicast addressing
sends a single IP datagram to only one receiver. The Unicast address will be the unique IP
of the receiving device. Note: Either a Multicast or Unicast address may be entered into this
field when Multicast Mode is set to SEND.
Multicast Port​ - ​ P ort number are used for sending UDP transfers in conjuction with
Multicast IPA. The valid range is 0-65535. If the port number is set to 0, then no UDP
transfers will take place. 2000 is default.
Note:​ This field may be edited if Multicast Mode is set to SEND.
Type of Service​ - ​ T ype of Service helps define how the network should make negotiate
queuing between throughput, delay, reliability, and cost.
Time-to-Live​ - ​ T ime to live is a numeric value from 1 to 255 that specifies the number of
iterations or transmissions the packet can undergo before it is discarded. The default value
is 7.
FEC Mode​ - T​ h e Forward Error Correction technique implemented in this encoder conforms
to the SMPTE 2022-1-2007 standard for the carriage of real-time Video/Audio content over
IP networks. When enabled, the encoder will send two FEC streams to the same destination
IP address as the source stream, using destination port plus two and destination port plus
four. The FEC requires two parameters, L and D, affecting FEC bandwidth and recovery
capacity. The standard places three restrictions on these parameters; L is greater than or
equal to 4 and less than or equal to 20, D is greater than or equal to 4 and less than or
equal to 20, and the product of L and D is less than or equal to 100.
NOTE:​ RTP must be ON before FEC streams start. FEC streams IP TTL matches the source
stream.
DVB Per IP​ - ​ D VB per IP configures the amount of DVB 188 Byte Transport Stream packets
for an IP packet payload. 1 DVB packet per IP packet has the lowest impact on service
interruption if 1 IP packet is lost, however it has the highest data overhead due to packing
inefficiency. 7 DVB packets per IP packet has the highest impact on service interruption if 1
IP packet is lost, however has the lowest data overhead due to packing efficiency. 4 DVB
packets per IP packet is a compromise between efficiency and service impact. 7 DVB
packets per IP packet is the default value and recommended for most applications.
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