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Spectral Feature

Computation of the spectrogam & mel-filter bank features.

Cmd options

See ./scripts/sptk/compute_{spectrogram,fbank}.py -h

Usage

  1. Spectrogram

    # 257-dim log spectrogram
echo "egs asset/egs.wav" | ../../scripts/sptk/compute_spectrogram.py \
    --frame-len 400 \
    --frame-hop 256 \
    --round-power-of-two true \
    --center true \
    --apply-log true \
    - feats.ark
# visualize and check
../../scripts/sptk/visualize_tf_matrix.py \
    --input ark --cmap jet --frame-hop 256 \
    feats.ark

  2. Fbank

    # 80-dim log fbank
echo "egs asset/egs.wav" | ../../scripts/sptk/compute_fbank.py \
    --frame-len 400 \
    --frame-hop 256 \
    --round-power-of-two true \
    --center true \
    --apply-log true \
    --num-bins 80 \
    - feats.ark
# visualize and check
../../scripts/sptk/visualize_tf_matrix.py \
    --input ark --cmap jet --frame-hop 256 \
    feats.ark