Speech enhancement (Interspeech 2016, Ideal)
https://www.isca-speech.org/archive/interspeech_2016/jeon16_interspeech.html
K.M., Kim, H.K. (2016) Local Sparsity Based Online Dictionary Learning for Environment-Adaptive Speech Enhancement with Nonnegative Matrix Factorization. Proc. Interspeech 2016, 2861-2865, doi: 10.21437/Interspeech.2016-586