Human Language Technology

Message from the Director


Greetings from Singapore! Welcome to the Human Language Technology (HLT) Lab.

HLT Lab is home to 50 researchers, post-doc fellows, postgraduate students, interns, and visiting scholars. Our people stand out for the commitment to academic excellence, diversity, vibrancy, and creative innovation. Our lab is a place where aspiring people meet real-world research problems in speech and language processing.

HLT Lab benefits from close collaboration with the industry, unique multilingual landscape in Singapore that offers interesting research problems, and inextricable connection to international research community. All these make HLT Lab a great place to study and to work. We are proudly part of the National University of Singapore, a leading global university in Asia. The Lab just organizes IEEE ASRU 2019 and will be the leading host of IEEE ICASSP 2022 in Singapore.

HLT Lab has several immediate openings in 2020, that include Research Engineers, Post-doc Research Fellows, and Senior Research Fellows. Please find the information at Jobs. Thank you for taking your time to know better about us and our work.   

– Professor Haizhou Li, Fellow of IEEE, ISCA

About HLT Lab

The Human Language Technology (HLT) Laboratory is at the Department of Electrical and Computer Engineering, National University of Singapore. The Lab establishes itself as the technology leader in Human-centric Artificial Intelligence (H.AI). It is known for its research in automatic speech recognition, speaker and language recognition, speech synthesis and conversion, spoken dialogue, and human-robot interaction. The laboratory undertakes industry projects and solves real-world engineering problems. It also leads major research programs in national initiatives such as Neuromorphic Computing, National Robotics Programme, and AI Singapore. The HLT team received numerous awards that include IEEE Computational Intelligence Society Outstanding TNNLS Paper Award 2016, IEEE Computational Intelligence Magazine Outstanding Paper Award 2019, APSIPA ASC Best Student Paper 2017 and 2018, ISCA Fellow 2018, and 1st Prize of International Competition for Brain-inspired Computing 2018.



  • [15 July 2021] A long paper “Is Someone Speaking? Exploring Long-term Temporal Features for Audio-visual Active Speaker Detection” by Ruijie Tao, Zexu Pan, Rohan Kumar Das, Xinyuan Qian, Mike Zheng Shou, and Haizhou Li has been accepted by ACM Multimedia (MM), Chengdu China, Oct 2021. Please visit the link for more details.
  • HLT-NUS team achieved good results in ActivityNet Challenge at CVPR workshop 2021. Congratulations to the HLT-NUS team (Ruijie Tao, Zexu Pan, Rohan Kumar Das, Xinyuan Qian, Mike Zheng Shou and Haizhou Li), ranked 3rd place in the AVA-ActiveSpeaker Challenge. Please visit the link for more details.
  • HLT-NUS team achieved good results in Diagnosing COVID-19 using Acoustics (DiCOVA) 2021 Challenge. Congratulations to the HLT-NUS (Rohan Kumar Das, Maulik Madhavi and Haizhou Li), ranked 6th place (29 teams in total) in the Cough Sound Task. Please visit the link for more details.
  • HLT Lab received a visit from Prof. Kar-Ann TOH, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea on 08 February 2021. Please check out the photos.
  • HLT team has 9 papers accepted at ICASSP 2021. Please check out the “Publications” page for our newly accepted papers at ICASSP 2021.
  • Professor Haizhou Li has been elected as a Member of the IEEE Signal Processing Society’s Awards Board for the term January 2021 through 31 December 2023. Please visit the link for more details.
  • HLT Lab is pleased to co-organize the ICASSP 2021 Signal Processing Grand Challenge: The Multi-Speaker Multi-Style Voice Cloning Challenge (M2VoC). Organizers: Lei Xie, Hai Li, Song Shi, Haizhou Li, Zhiyong Wu, Xiaohai Tian, Fen Hong, and Hui Bu. Please visit the link for more details.
  • HLT-NUS team has won top position in both tasks (Automatic Lyrics-to-Audio Alignment and Automatic Lyrics Transcription) in MIREX International Benchmarking 2020 and has been ranked first for automatic lyrics-to-audio alignment task two years in a row. Congratulations to Ph.D. candidate Ms. Xiaoxue Gao and Research Fellow Dr. Chitralekha Gupta supervised by Professor Haizhou Li. Please visit the link for more details.
  • HLT-NUS team achieved good results in The Blizzard Challenge 2020. Congratulations to the HLT-NUS (Xiaohai Tian, Xuehao Zhou, Mingyang Zhang, Yi Zhou, Grandee Lee, Rui Liu, Berrak Sisman, Haizhou Li) has ranked 2nd place (8 teams in total) in the Shanghainese Synthesis Task, and the 6th place (16 teams in total) in the Mandarin Synthesis Task. Please visit the link for more details.