online-offline-CGMM-for-MVDR

Online/offline CGMM implementation of the paper:

Higuchi, Takuya, et al. "Online MVDR beamformer based on complex Gaussian mixture model with spatial prior for noise robust ASR." IEEE/ACM Transactions on Audio, Speech, and Language Processing 25.4 (2017): 780-793.

Besides the commonly used offline CGMM, we also implemented online CGMM with spatial prior mentioned in paper.

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Files

cgmm.py:

1. class CGMM which is used as offline mode. Using EM to do Maximal Likelihood (ML) estimation
2. class PriorCGMM(CGMM) which is used as online mode. Using EM to do Maximal A Posterior (MAP) estimation.

run-offline-cgmm-mvdr.py: Psuedo-codes of using offline CGMM (CGMM) to do MVDR

run-online-cgmm-mvdr.py: Psuedo-codes of using online CGMM (PriorCGMM) to do MVDR

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Usage

Offline manner: see run-offline-cgmm-mvdr.py

Online manner: see run-online-cgmm-mvdr.py