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by patentatt 1274 days ago
Does anyone know what codec they're using at 2kbps per voice call?
3 comments

Probably not this but LyraV2 at 3.2kbps sounds super clean

https://opensource.googleblog.com/2022/09/lyra-v2-a-better-f...

I'd say it sounds decent but certainly not "super clean".
AMR_SID claims to be 1.8kbps[1], but I can't imagine it sounds very good.

[1]: https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code...

And the streaming video will be of an empty chessboard in a room with unchanging lighting.
Or AI video generator text prompts.
You joke but nvidia is looking at AI compression: https://www.fiercevideo.com/tech/nvidia-swaps-codecs-for-ai-... Which would model the person and "generate" video.
Just give up on transmitting video. Just animate the person's profile pic. I'd rather video chat with an animated cat than a human lawyer any day.
Hopefully it sounds better than AMBE2+, codec2 and whatever 1st gen Iridium was using at 2400baud.
I think it's very hard to get better quality out of that little data :(
Most sat phones use a kind of AMBE from DVSI