Ravenna AES67 Practical Manual page 21

RVSC
Next, you can select the desired latency by adjusting the delay value accordingly. The RVSC provides
the ability to enter the latency individually per stream to accommodate for any relevant packet delay
variation, individual stream setup and correlation between any streams on the network, if desired.
The number indicates the desired playout delay of an individual audio sample with respect to its
sampling time at the sender. The configured number must be large enough to cover the original
packet time plus any jitter the packet may experience while being transported across the network.
Since the packet time in AES67 is 1 ms, the delay needs to be larger than 48 samples plus sufficient
delay to cope with the packet jitter
Other devices or AoIP systems may offer predefined (sometimes even system-wide) latency classes
like low / medium / high or the equivalent.
The final step is to assign the channels being transported in the stream to the desired output channels
of the device:
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A suggested minimum value to start with is 144 samples (3 ms). A higher value may be required in larger
networks or with higher traffic load, smaller values may work with lower traffic or just one or two switches
in place. In case the number is too small, the receiver will indicate an error (packets coming in too late).
S : R S P
CREEN SHOT X TREAM ROPERTIES
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Page 21 of 28
AES67 Practical Guide
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