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Codec 2 PAPR, Phase and VQ Experiments #250
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This reverts commit 9b71e0b.
…mples, however messes up background noise handling in mmt1 as raised energy is above threshold in postfilter.c
…ression using hilbert clipper on synthesis. Sounds pretty good (even mmt1) with 10dB gain
…Seems to work OK by HC is complicating comparison
…ver now quantised mean samples are softer, and different segments have different levels. Not satisfactory
… on 27 and 12 bit VQ, although level is a little lower. This is a form of compressions. Level comes up nicely with 10dB synthesis/HC gain
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This PR supports R&D aimed at improving Codec 2 speech quality (WP2000 in ARDC plan). It's not intended for merge, rather to support R&D. The development is conducted using a combination of C, Octave and bash scripts. The R&D is documented in a LaTeX report in
codec2/doc/ratek_resampler
.Topics include: