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exerc03b

README.md

On a 4.5 hour recording

Similar to ../exerc03a but considering only the windy interval.

  • WAV file: MARS_20161221_000046_SongSession_16kHz_HPF5Hz.wav

  • Selection file: ../exerc01/MARS_20161221_000046_SongSession_16kHz_HPF5HzNorm_labels.csv.

Extracting the individual unit instances

$ ecoz2 sgn extract --segments ../exerc01/MARS_20161221_000046_SongSession_16kHz_HPF5HzNorm_labels.csv \
                    --wav ${SOURCE_WAV} \
                    --time-ranges 6000-10500 \
                    --out-dir data/signals

Loading .../MARS_20161221_000046_SongSession_16kHz_HPF5Hz.wav
num_samples: 266117287  sample_rate: 16000  bits_per_sample: 16  sample_format = Int
duration: 16632  sample_period: 0.0000625
parsed selection_ranges = []
parsed time_ranges = [(6000.0, 10500.0)]
      I4   17 instances
       E  302 instances
       I  205 instances
      E1   16 instances
       F  130 instances
      G2   98 instances
       A  190 instances
      Bu   43 instances
      I3  120 instances
      C1    6 instances
      I2  221 instances
       C  207 instances
      EG    3 instances
       ?    2 instances
       H   49 instances
       G   37 instances
       P   72 instances
       B    8 instances
       D   72 instances
      Bm  166 instances
      Bd   30 instances
       M   29 instances
          2023 total extracted instances

$ rm -rf data/signals/\?

Generating the LPC prediction vector sequences

ecoz2 lpc -P 36 -W 45 -O 15 -m 10 data/signals

Generating the TRAIN and TEST predictor lists

tt-list.csv will contain all the available predictor filenames with ~80% per class marked as "TRAIN" and ~20% as "TEST":

echo "tt,class,selection" > tt-list.csv
for class in `ls data/predictors/`; do
    ecoz2 util split --train-fraction 0.8 --file-ext .prd --files data/predictors/${class} >> tt-list.csv
done

The totals:

$ grep TRAIN tt-list.csv| wc -l
    1596
$ grep TEST tt-list.csv| wc -l
    408

Codebook generation

Using all TRAIN instances:

$ ecoz2 vq learn --prediction-order 36 --epsilon 0.0005 --predictors tt-list.csv

vq_learn: base_codebook_opt=None prediction_order=Some(36), epsilon=0.0005 codebook_class_name=_ predictor_filenames: 1596

Codebook generation:

prediction_order=36 class='_'  epsilon=0.0005

161199 training vectors (ε=0.0005)
Report: data/codebooks/_/eps_0.0005.rpt
...

The resulting clustering metrics above are shown in the following plot:

cb.plot_evaluation.py data/codebooks/_/eps_0.0005.rpt.csv

Vector quantization

Quantize all vectors (TRAIN and TEST) using a number of the various codebook sizes:

for M in 0032 0064 0128 0256 0512 1024 2048 4096; do 
   ecoz2 vq quantize --codebook data/codebooks/_/eps_0.0005_M_${M}.cbook data/predictors
done

Resulting sequences get generated under data/sequences/M<M>/.

HMM training and classification

Running ./hmm-exercise.sh