A paper from the project has been presented at EUSIPCO 2017 on Kos, Greece. The paper is entitled A Variational EM Method for Pole-Zero Modeling of Speech with Mixed Block Sparse and Gaussian Excitation and was written by Liming Shi, Jesper Kjær Nielsen, Jesper Rindom Jensen and Mads Græsbøll Christensen. Liming Shi presented the paper at the conference. EUSIPCO is the flagship conference of the European Association for Signal Processing (EURASIP).