Ludwig Schwardt

Voice conversion : an investigation

Ludwig Schwardt, 1997 .

Efficient Mixed-Order Hidden Markov Model Inference

Johan A. du Preez, Ludwig Schwardt, J. D. Preez, 2007 .

Automatic language identification using mixed-order HMMs and untranscribed corpora

Johan A. du Preez, Ludwig Schwardt, 2000, INTERSPEECH.