Factored MLLR Adaptation Algorithm for HMM-based Expressive TTS. - June Sig Sung; Doo Hwa Hong; Hyun Woo Koo; Nam Soo Kim (INTERSPEECH, 2012)

Factored maximum likelihood kernelized regression for HMM-based singing voice synthesis. - June Sig Sung; Doo Hwa Hong; Hyun Woo Koo; Nam Soo Kim (INTERSPEECH, 2013)

Statistical Approaches to Excitation Modeling in HMM-Based Speech Synthesis. - June Sig Sung; Doo Hwa Hong; Hyun Woo Koo; Nam Soo Kim (IEICE Trans. Inf. Syst., 2013)