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How much data bandwidth does the V-Iris use in AES67 mode

How much data bandwidth does the V-Iris use in AES67 mode

Apr 16, 2019

V-Iris AES67 data bandwidth

 

1 x V-Iris panel bandwidth usage: ~5.3 Mbps, then ~1.6 Mbps for each additional channel (up to a total of 3 channels, so ~8.6 Mbps).

 

Once the connection is established we are sending uncompressed 24bits 48kHz audio over RTP for each audio channel. So the audio itself is 1.152 Mbps.

Each RTP packet we send has 12 (RTP) + 8 (UDP) + 20 (IP) + 26 (Ethernet) = 66 bytes = 528 bits of overhead.

In AES67 if you send 1ms packets that’s 1000 packets per second = 528 kbps of overhead on top of the 1.152 Mbps of audio = roughly 1.6 Mbps

If you send 125 usec packets that’s 8000 packets per second = 4.224 Mbps of overhead on top of the 1.152 Mbps of audio = roughly 5.3 Mbps. (Default mode)

AES67 allows for multiplexing multiple channels in the same packet. That’s why additional channels don’t add as much overhead

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