RE: Full duplex audio over LTE

Didrik Rokhaug — Thu, 04 Mar 2021 13:11:29 GMT

Hi,

[quote user=""]Can the nRF9160 do continuous full duplex audio streams over the LTE connection (viop)? [/quote]

When testing, we have seen data rates of ~300kb/s, which I believe should be enough to do voice over IP.

But, it is not really the use case the nRF9160 was designed for, so I don't know how well it will work.

[quote user=""]Is the processor powerful enough to not only (de)compress the audio but also do echo cancelling? [/quote]

Here I really do not have enough experience to give you a good answer. It sounds optimisic to me, but it might be possible.

The nRF9160 does have the DSP extension to the Cortex-M33 CPU, which probably will help.

Best regards,

Didrik

awneil — Thu, 04 Mar 2021 10:57:12 GMT

I think this also depends on the capabilities of the network - not all are designed for carrying voice over LTE-M (VoLTE-M)