mirror of https://github.com/thesofproject/sof.git
30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
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This directory contains a tool to create configuration blob for SOF
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MFCC component. It's simply run in Matlab or Octave with command
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"setup_mfcc". The MFCC configuration parameters can be edited from the
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script.
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The configuration can be test run with testbench. First the test topologies
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need to be created with "scripts/build-tools.sh -t". Next the testbench
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is build with "scripts/rebuild-testbench.sh".
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Once the previous steps are done, a sample wav file can be processed
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into stream of cepstral coefficients with script run_mfcc.sh. E.g.
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next command processes an ALSA test file with speech clip "front center".
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The output file is hard-coded to mfcc.raw.
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./run_mfcc.sh /usr/share/sounds/alsa/Front_Center.wav
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The output can be plotted and retrieved with Matlab or Octave command:
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[ceps, t, n] = decode_ceps('mfcc.raw', 13);
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In the above it's known from configuration script that MFCC was set up to
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output 13 cepstral coefficients from each FFT -> Mel -> DCT -> Cepstral
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coefficients computation run.
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Other kind of signals have quite big visual difference in audio features. Try
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e.g. other sound files found in computer.
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./run_mfcc.sh /usr/share/sounds/gnome/default/alerts/bark.ogg
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./run_mfcc.sh /usr/share/sounds/gnome/default/alerts/sonar.ogg
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