Remove old pitch estimator and retrain all models

Totally untested -- most likely doesn't work

Untested

Remove already-disabled silence chopping code and make time alignment
the same as lpcnet_demo -features

Jean-Marc Valin authored 1 year ago and Jean-Marc Valin committed 1 year ago

This only affects custom modes (builds with --enable-custom-modes) with frame
sizes 2.5, 5, 10, and 20ms and sampling rates below 40 kHz. The problem does
not affect normal use of Opus (using OpusEncoder/OpusDecoder) even when built
with custom modes enabled, but only special applications that use
OpusCustomEncoder/OpusCustomDecoder.

More efficient than PVQ

Signed-off-by: Jan Buethe <jbuethe@amazon.de>

Signed-off-by: Jan Buethe <jbuethe@amazon.de>

Couldn't be used anymore

Helps with stability with little cost in training speed