SETK: Speech Enhancement Tools integrated with Kaldi

Here are some speech enhancement/separation tools integrated with Kaldi. I use them for front-end's data processing.

Python Scripts

• Supervised (mask-based) adaptive beamformer (GEVD/MVDR/MCWF...)
• Data convertion among MATLAB, Numpy and Kaldi
• Data visualization (TF-mask, spatial/spectral features, beam pattern...)
• Unified data and IO handlers for Kaldi's scripts, archives, wave and numpy's ndarray...
• Unsupervised mask estimation (CGMM/CACGMM)
• Spatial/Spectral feature computation
• DS (delay and sum) beamformer, SD (supper-directive) beamformer
• AuxIVA, WPE & WPD, FB (Fixed Beamformer)
• Mask computation (iam, irm, ibm, psm, crm)
• RIR simulation (1D/2D arrays)
• Single channel speech separation (TF spectral masking)
• Si-SDR/SDR/WER evaluation
• Pywebrtc vad wrapper
• Mask-based source localization
• Noise suppression
• Data simulation
• ...

Please check out the following instruction for usage of the scripts.

• Adaptive Beamformer
• Fixed Beamformer
• Sound Source Localization
• Spectral Feature
• Spatial Feature
• VAD
• Noise Suppression
• Steer Vector
• Room Impluse Response
• Spatial Clustering
• WPE & WPD
• Time-frequency Mask
• Format Transform
• Data Simulation

Kaldi Commands

• Compute time-frequency masks (ibm, irm etc)
• Compute phase & magnitude spectrogram & complex STFT
• Seperate target component using input masks
• Wave reconstruction from enhanced spectral features
• Complex matrix/vector class
• MVDR/GEVD beamformer (depend on T-F mask, not very stable)
• Fixed beamformer
• Compute angular spectrogram based on SRP-PHAT
• RIR generator (reference from RIR-Generator)

To build the sources, you need to compile Kaldi with --shared flags and patch matrix/matrix-common.h first

typedef enum {
    kTrans          = 112,  // CblasTrans
    kNoTrans        = 111,  // CblasNoTrans
    kConjTrans      = 113,  // CblasConjTrans
    kConjNoTrans    = 114   // CblasConjNoTrans
} MatrixTransposeType;

Then run

mkdir build
cd build
export KALDI_ROOT=/path/to/kaldi/root
export OPENFST_ROOT=/path/to/openfst/root
# if on UNIX, need compile kaldi with openblas
export OPENBLAS_ROOT=/path/to/openblas/root
cmake ..
make -j

Now I mainly work on sptk package, development based on kaldi is stopped.