Human Language Technology

Berrak Sisman

Affiliated Research Fellow (NUS) & Assistant Professor (SUTD)


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Dr. Berrak Sisman is an Assistant Professor at Singapore University of Technology and Design and an affiliated Research Fellow of Human Language Technology Lab at the National University of Singapore (NUS). She received her PhD in Electrical and Computer Engineering from NUS, fully-funded by A*STAR Graduate Academy. She has been a visiting researcher at Columbia University in the City of New York in 2020. During her PhD studies, she was attached to RIKEN Advanced Intelligence Project (Japan) in 2018. She was also a visiting scholar at The Centre for Speech Technology Research (CSTR), and an exchange PhD student at University of Edinburgh, Scotland in 2019. Dr. Berrak Sisman’s research interests include speech information processing, machine learning, speech synthesis and voice conversion. She has published in leading journals and conferences, including IEEE/ACM Transactions on Audio, Speech and Language Processing, ASRU, INTERSPEECH and ICASSP. She was awarded APSIPA PhD Forum Best Presentation Award for her presentation titled “Limited Data Voice Conversion from Sparse Representation to GANs and WaveNet” in 2018, Hawaii, United States. In 2019, she has represented NUS team’s participation to ‘ZeroSpeech 2019: TTS without T’, and received top scores. She has served as the Local Arrangement Co-chair of IEEE ASRU 2019, Chair of Young Female Researchers Mentoring @ASRU2019, and Chair of the INTERSPEECH Student Events in 2018 and 2019. She is a reviewer at IEEE Signal Processing Letters, INTERSPEECH, and IEEE Transactions on Emerging Topics in Computational Intelligence.


  • Non-parametric Approach to Voice Morphing
  • AI speech lab: Automatic Speech Recognition for Public Services

Research interests

  • Speech synthesis
  • Voice conversion