Digigram IQOYA X/LINK Series User Manual page 119

Ip audio codecs
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Sent stream settings section
Audio encoding format
Forward error correction
Advanced parameters:
Audio stream payload type
Packet size (ms)
FEC stream payload type
DSCP
Size of the jitter buffer to be allocated by the IP codec instance when
the user selects this profile at call time.
Read/Write
Audio encoding format of the stream sent to the remote party.
Read/Write
Forward Error Correction (FEC) is a technique used to reduce data
transmission errors on unreliable networks by sending additional
information allowing to correct them.
This parameter allows to select the FEC scheme for the FEC stream
sent to the remote party. Possible values are:
No FEC stream
+50% bandwidth, recovery 2, 1 stream (audio)
+100% bandwidth, recovery 3, 2 streams (audio + FEC)
+100% bandwidth, recovery 4, 2 streams (audio + FEC)
+50% bandwidth, recovery 1/2, 2 streams (audio + FEC)
+33% bandwidth, recovery 1/3, 2 streams (audio + FEC)
+25% bandwidth, recovery 1/4, 2 streams (audio + FEC)
+20% bandwidth, recovery 1/5, 2 streams (audio + FEC)
+10% bandwidth, recovery 1/10, 2 streams (audio + FEC)
'recovery N' means that up to N consecutive lost IP packets can be
reconstructed thanks to the FEC scheme, 'recovery 1/N' means one
lost IP packet out of N consecutive packets can be reconstructed
thanks to the FEC scheme.
Read/Write
Payload type of the audio stream sent to the remote party. It's an
integer between 0 and 127.
Read/Write
Defines the size in ms of the audio packets sent to the remote party or
0 to use the default value.
The packet size is the amount of audio data to be put in the network
packets, expressed in ms.
For PCM, G711, G722, and aptX formats: The entered value is
adjusted to the nearest greater or equal multiple of the processing
granularity. It is the amount of audio samples processed by the audio
engine at each cycle.
For MPEG formats: The entered value is adjusted to the nearest
greater or equal multiple of the MPEG frame.
For AAC formats: The entered value is adjusted to the nearest greater
or equal multiple of the AAC frame.
Read/Write
Payload type of the FEC stream sent to the remote party. It's an
integer between 0 and 127.
Read/Write
Defines the Quality of Service (QoS) class for the audio stream as
defined in the Differentiated Services Code Point (DSCP) standard.
Possible values are:
Default
Class 1
IQOYA X/LINK range user manual
119

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