Comment by nullc
7 years ago
Opus is awesome and covers a previously unmatched spectrum of use cases... but that isn't everything.
Opus isn't good enough to be a replacement for AMBE for use over radio. Opus doesn't make it easier to make very high quality speech synthesis, etc.
Opus loss robustness could be much better using tools from this toolbox-- and we're a long way from not wanting better performance in the face of packet loss.
This is roughly 2x improvement over AMBE+2, except AMBE peaks at maybe couple hundred MIPS, and there are better less computationally intensive alternative, like 20-70 MIPS https://dspini.com/vocoders/lowrate/twelp-lowrate/twelp2400
Opus is still improving, v1.1 to v1.2 then onto v1.3 (current in FFMpeg) saw huge reductions in compute for encoding, and the minimum bitrate for stereo wideband fall year after year.
The limiting factor for Opus's penetration has been compute, FEC is still rarely supported on VOIP deskphones due to this, ditto for handling multiple Opus calls at once.