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mp3rs-mfr-20141103.tar.bz2 2014-11-03 396.3 kB
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mp3rs-20141007-nowav-f4-64Hz.tar.bz2 2014-10-07 5.3 MB
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Totals: 10 Items   32.3 MB 0 
Project: MP3respectr
Subproject: MFR
Date: 20141120
Autor: zvezdochiot <zvezdochiot@users.sourceforge.net>

Lowering the harmful effects of mp3 encoders on the sound with the filtration loop.
Produced by applying the inverse of the median filter in the linear space R
and a median filter directly in the energy space R2


     normal         sharpen

R    mp3 ===mf(-1)==> ~mp3
     wav               |
______^________________|_____
      |                |
      |                V
R2   wav2 <==mf(1)== ~mp32


Depends:

octave, sox, bash

USAGE:

1) WORKDIR:

$ ls -1
mp3rsmfd.m
mp3rsmf.m
mp3rsmfr2nq.m
mp3rsmfr2q.m
mp3rsmfr.m
mp3rsmfrq.m
mp3rsmfsa.m
mp3rsmfs.m
mp3rsmfso.m
mp3rsnorm.m
mp3rsr2r.m       # trasfer the sound from R2 to R
mp3rsrr2.m       # trasfer the sound from R to R2
README.txt
test.mp3         # Veda-2013-single-Nezryachiy.mp3

2) EXAMPLE:

$ sox -S test.mp3 test.mp3.wav
$ octave

octave:1> [wmp3, FS, BPS] = wavread ("test.mp3.wav");
octave:2> wmp3=mp3rsmfrq(wmp3);
octave:3> wavwrite (wmp3, FS, BPS, "test.mfr.wav");
octave:4> [wmp3, FS, BPS] = wavread ("test.mp3.wav");
octave:5> wmp3=mp3rsmfr2q(wmp3);
octave:6> wavwrite (wmp3, FS, BPS, "test.mfr2.wav");
octave:7> [wmp3, FS, BPS] = wavread ("test.mp3.wav");
octave:8> wmp3=mp3rsmfr2nq(wmp3);
octave:9> wavwrite (wmp3, FS, BPS, "test.mfr2n.wav");
octave:10> quit

3) ANALISE:

$ bash sox-spectrogram-1.sh test.mp3
$ bash sox-spectrogram-1.sh test.mfr.wav
$ bash sox-spectrogram-1.sh test.mfr2.wav
$ bash sox-spectrogram-1.sh test.mfr2n.wav
Source: README.txt, updated 2015-01-23