Digigram Software for IQOYA SERV/LINK 88 (Upgrades from 8 Codecs to 16) - Manual (Page 66)

IQOYA SERV/LINK user manual
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Click on the icon on the bottom right of the page to add an IP destination.
Enter the new target IP address, UDP port, and the network interface through which the stream is sent.
Click on the icon to remove a destination.
Network interface/VLAN Read/Write Select the network interface, bond or VLAN for this stream.
In case the target address is unicast, select “Any” so that the Eth interface is determined
automatically according to this IP address, or select a bond or a VLAN.
In case the target IP address is multicast, select the Eth interface, the bond or VLAN.
Audio stream: Local source port Read/Write Local UDP port number of IQOYA SERV/LINK
Audio stream: DSCP Read/Write Select the quality of service (QoS) class of the stream.
Audio stream: Payload type Read/Write RTP payload value that defines the audio profile. Standard values are:
● 0 for G711
● 9 for G722; 14 for MPEG
● 96 for AAC, apt-X, Opus
Audio stream: Payload size Read/Write Size (in ms) of the audio transported by an RTP frame.
For unframed formats (like PCM, G7xx, apt-X), payload size value is rounded to the nearest
multiple value that is equal or higher than the processing granularity value.
For framed formats (like MPEG, AAC), payload size value is rounded to the nearest multiple
value equal or higher than the frame size.
Audio stream: Stop streaming on
silence detection Read/Write IQOYA can automatically stop streaming and restart streaming upon silence/signal detection on
the audio source. This feature can be enabled by setting this option to “Yes”.
As a consequence, a decoder receiving the stream will switch to a backup when silence is
detected on the input of the encoder that generates the stream.
Set this option to “No” if you want the encoder to stream even when the audio source is silent.
Audio stream:Synchro Clock Read/Write None, or NTP.
NTP can be selected if the option “NTP based audio synchro” is installed.
Audio stream:Presentation delay Read/Write Valid if Synchro Clock is set to NTP.
Offset of time added to the current NTP time for time-stamping the IP packets so that several
decoders play the packets at the same time.
This value, expressed in microseconds, must be at least equal to the maximum network
transport time for an IP packet to reach the target decoders.
Once the encoder and the decoders are configured, this value can be tuned by checking the IP
metrics. The maximum value is 2 000 000 microseconds (2 seconds) for unframed audio formats
(PCM, apt-X, G7xx), and 256 frames for framed audio formats (MPEG, AAC). In MPEG Layer 2
48 kHz, this corresponds to 6 seconds (6 000 000 microseconds).
In-band format signalling Yes/No Yes : the description of the audio format is inserted in the IP audio stream so that the decoder
can automatically adapt to the received format. This works only with IQOYA encoders and
decoders.
In this mode, FEC stream is sent to the same destination IP address as the IP audio stream, on
UDP port +2.
No : the decoder must be configured to receive the appropriate audio format.
In this mode, FEC stream destination IP address and UDP port can be configured.