Sailor Hardik Bhupendra

Scientist Sailor Hardik Bhupendra

Research Area
  • Speech Signal Processing
  • Paralinguistics
  • Speech Recognition
  • Representation Learning
  • Multimodal LLM
  • 3rd rank in SVDD 2024 Challenge (part of IEEE SLT 2024)
  • ICASSP 2023 Best Reviewer Award
  • Samsung Excellence Award, Innovator - Publications
  • First Prize in 5 min Ph.D. Thesis Competition at S4P 2018 at DA-IICT, Gandhinagar, India (a satellite event of INTERSPEECH 2018)
  • Student Grant of 650 Euros to Present Three First Authored Papers in INTERSPEECH 2018.

Journal Publications

  1. Q Wang, H. B. Sailor, KA Lee, K Ma, KH Goh, WF Boh, “Using Twitter Dataset for Social Listening in Singapore”, IEEE Access [Data release paper].
  2. Kamble, M., Sailor, H., Patil, H., & Li, H. (2020). Advances in anti-spoofing: From the perspective of ASVspoof challenges. APSIPA Transactions on Signal and Information Processing.
  3. Hardik B. Sailor and Hemant A. Patil, "Auditory feature representation using convolutional restricted Boltzmann machine and Teager energy operator for speech recognition", The Journal of the Acoustical Society of America Express Letters (JASA-EL), Volume: 141, Issue: 6, June 2017.
  4. Hardik B. Sailor and Hemant A. Patil, "Novel unsupervised auditory filterbank learning using convolutional RBM for speech recognition," IEEE/ACM Transactions on Audio, Speech and Language Processing (IEEE TASLP), Volume: 24, Issue: 12, Pages 2341-2353, December 2016.

Conference Publications

  1. Yue Heng Yeo, Haoyang Li, Yizhou Peng, Shreyas Gopal, Hexin Liu, Leibny Paola Garcia-Perera, Hardik B. Sailor, Jeremy HM Wong, Eng Siong Chng, “Improving Code-Switching ASR with Code-Mixing Guided Synthetic Speech”, Interspeech 2026.
  2. Zihan Pan, Sailor Hardik, Jinyang Wu, “Supervised Post-training of Speech Foundation Models for Robust Adaptation in Speech Deepfake Detection”, Interspeech 2026.
  3. Jinyang Wu, Zihan Pan, Qiquan Zhang, Sailor Hardik Bhupendra, Soumik Mondal, “Quantizer-Aware Hierarchical Neural Codec Modeling for Speech Deepfake Detection”, Interspeech 2026.
  4. Jinyang Wu, Nana Hou, Zihan Pan, Qiquan Zhang, Sailor Hardik Bhupendra, Soumik Mondal, “SEA-Spoof: Bridging the Gap in Multilingual Audio Deepfake Detection for South-East Asia”, Interspeech 2026.
  5. Qiongqiong Wang, Hardik B. Sailor, Tianchi Liu, Wenyu Zhang, Muhammad Huzaifah, Nattadaporn Lertcheva, Shuo Sun, Nancy F. Chen, Jinyang Wu, AiTi Aw, “Benchmarking Contextual and Paralinguistic Reasoning in Speech-LLMs: A Case Study with In-the-Wild Data”, EMNLP 2025 Findings.
  6. Qiongqiong Wang*, Hardik Sailor*, Jeremy Wong, Tianchi Liu, Shuo Sun, Wenyu Zhang, Muhammad Huzaifah, Nancy Chen and Ai Ti Aw, “Incorporating Contextual Paralinguistic Understanding in Large Speech-Language Models”, IEEE ASRU 2025. [Equal contribution]
  7. Jeremy Wong, Muhammad Huzaifah, Hardik Sailor, Shuo Sun, Kye Min Tan, Bin Wang, Qiongqiong Wang, Wenyu Zhang, Xunlong Zou, Nancy Chen and Ai Ti Aw, “Diversity and complementarity of speech encoders across diverse tasks in a multi-modal large language model”, IEEE ASRU 2025.
  8. Zihan Pan, Hardik Sailor and Jinyang Wu, “MoLEx: Mixture of LoRA Experts in Speech Self-Supervised Models for Audio Deepfake Detection”, IEEE ASRU 2025.
  9. Qiongqiong Wang, Hardik B Sailor, Tianchi Liu, and Ai Ti Aw, “Contextual paralinguistic data creation for multi-modal Speech-LLM: Data condensation and spoken QA generation,” Proc. Interspeech 2025.
  10. MERaLiON Team, “Towards a speech foundation model for Singapore and beyond.” arXiv, 2024.
  11. T. Liu, I. Kukanov, Z. Pan, Q. Wang, H. B. Sailor, K. A. Lee, “Quantifying Language Mismatch Effects in Cross-Lingual Speech Anti-Spoofing,” IEEE SLT 2024.
  12. A. Guragain, T. Liu, Z. Pan, H. B. Sailor, Q. Wang, “Speech Foundation Model Ensembles for Singing Voice Deepfake Detection,” IEEE SLT 2024.
  13. Z. Pan, T. Liu, H. B. Sailor, Q. Wang, “Attentive Merging of Hidden Embeddings from Pre-trained Speech Model for Anti-spoofing Detection”, Interspeech 2024.
  14. A. Kachhi, A. Therattil, A. T. Patil, Hardik B. Sailor and H. A. Patil, “Teager Energy Cepstral Coefficients For Classification of Dysarthric Speech Severity-Level,” APSIPA ASC 2022.
  15. S. S. Chaturvedi, Hardik B. Sailor and H. A. Patil, “Noisy Student Teacher Training with Self Supervised Learning for Children ASR,” SPCOM 2022.
  16. Pratap Singh V., Hardik Sailor, Bhattacharya S. and Pandey A., “Spectral Modification Based Data Augmentation For Improving End-to-End ASR For Children's Speech”, Interspeech 2022.
  17. Kiran Praveen, Hardik Sailor, Abhishek Pandey, “Warped Ensembles: A Novel Technique for Improving CTC Based End-To-End Speech Recognition”, IEEE ASRU 2021.
  18. Hardik B. Sailor, Kiran Praveen T., Vikas Agrawal, Abhinav Jain, Abhishek Pandey, “SRI-B End-to-End System for Multilingual and Code-Switching ASR Challenges for Indian Languages”, Interspeech 2021.
  19. Dipesh K. Singh, Preet P. Amin, Hardik B. Sailor, and Hemant A. Patil, “Data Augmentation Using CycleGAN for End-to-End Children ASR”, EUSIPCO 2021.
  20. Hardik B. Sailor and Thomas Hain, “Multilingual Speech Recognition Using Language-Specific Phoneme Recognition as Auxiliary Task for Indian Languages”, Interspeech 2020.
  21. Hardik B. Sailor, Salil Deena, Md Asif Jalal, Rasa Lileikyte, Thomas Hain, “Unsupervised Adaptation of Acoustic Models for ASR using Utterance-level Embeddings from Squeeze-and-Excitation Networks”, IEEE ASRU 2019.
  22. Nirmesh J. Shah, Hardik B. Sailor, and Hemant A. Patil, “Whether To Pretrain DNN or Not?: An Empirical Analysis for Voice Conversion”, INTERSPEECH 2019.
  23. Ankur Patil, Siva Krishna Maddala, Mehak Piplani, Aditya Sai Pulikonda, Hardik B. Sailor and Hemant Patil, “DA-IICT/IIITV System for the 5th CHiME 2018 Challenge”, CHiME 2018.
  24. Hardik B. Sailor, “Auditory Representation Learning”, INTERSPEECH Doctoral Consortium 2018.
  25. Hardik B. Sailor and Hemant A. Patil, “Neural Networks-based Automatic Speech Recognition for Agricultural Commodity in Gujarati Language,” SLTU 2018.
  26. Hardik B. Sailor, Ankur T. Patil and Hemant A. Patil, “Advances in Low Resource ASR: A Deep Learning Perspective,” SLTU 2018.
  27. Hardik B. Sailor, Maddala Venkata Siva Krishna, Diksha Chhabra, Ankur Patil, Madhu Kamble and Hemant Patil, “DA-IICT/IIITV System for Low Resource Speech Recognition Challenge 2018”, INTERSPEECH 2018.
  28. Hardik B. Sailor, Madhu Kamble and Hemant Patil, “Auditory Filterbank Learning for Temporal Modulation Features in Replay Spoof Speech Detection”, INTERSPEECH 2018.
  29. Hardik B. Sailor and Hemant A. Patil, “Auditory Filterbank Learning Using ConvRBM for Infant Cry Classification”, INTERSPEECH 2018.
  30. Hardik B. Sailor and Hemant A. Patil, “Representation Learning for Speech Recognition System in Agricultural Commodity for Gujarati”, GCCS 2017.
  31. Hardik B. Sailor, Dharmesh Agrawal and Hemant A. Patil, “Unsupervised Filterbank Learning Using Convolutional Restricted Boltzmann Machine for Environmental Sound Classification”, INTERSPEECH 2017.
  32. Hardik B. Sailor, Madhu Kamble and Hemant A. Patil, “Unsupervised Representation Learning Using Convolutional Restricted Boltzmann Machine for Spoof Speech Detection”, INTERSPEECH 2017.
  33. Dharmesh M. Agrawal, Hardik B. Sailor, Meet H. Soni and Hemant A. Patil, “Novel TEO-based Gammatone Features for Environmental Sound Classification”, EUSIPCO 2017.
  34. Hardik B. Sailor and Hemant A. Patil, “Unsupervised Deep Auditory Model Using Stack of Convolutional RBMs For Speech Recognition”, INTERSPEECH 2016.
  35. Avni Rajpal, Tanvina Patel, Hardik Sailor, Maulik Madhavi, Hemant Patil and Hiroya Fujisaki, “Native Language Identification Using Spectral and Source-Based Features”, INTERSPEECH 2016.
  36. Hardik B. Sailor and Hemant A. Patil, “Unsupervised Learning of Temporal Receptive Fields Using Convolutional RBM For ASR Task”, EUSIPCO 2016.
  37. Mohammadi Zaki, Hardik B. Sailor and Hemant A. Patil, “Analysis of Hierarchical Bottleneck Framework for Improved Phoneme Recognition”, SPCOM 2016.
  38. Hardik B. Sailor and Hemant A. Patil, “Filterbank Learning Using Convolutional Restricted Boltzmann Machine For Speech Recognition”, ICASSP 2016.
  39. Anshu Chittora, Hemant A. Patil and Hardik B. Sailor, “Spectro-temporal Analysis of HIE and Asthma Infant Cries Using Auditory Spectrogram”, ICBAPS 2015.
  40. Hardik B. Sailor, Maulik C. Madhavi and Hemant A. Patil, “Significance of Phase-Based Features for Person Recognition using Humming”, PerMIn 2015.
  41. Hardik B. Sailor and Hemant A. Patil, “Fusion of Magnitude and Phase-based Features for Objective Evaluation of TTS Voice”, ISCSLP 2014.
  42. Nirmesh J. Shah, Hemant Patil, Maulik Madhvi, Hardik Sailor and Tanvina Patel, “Deterministic Annealing EM Algorithm for Developing TTS System in Gujarati”, ISCSLP 2014.
  43. Nirmesh J. Shah, Bhavik B. Vachhani, Hardik B. Sailor and Hemant A. Patil, “Effectiveness of Phonetic Segmentation Algorithms for Speech Synthesis”, ICASSP 2014.
  44. Talesara, Swati, Patil, Hemant A., Patel, Tanvina, Sailor Hardik and Shah, Nirmesh, “A Novel Gaussian Filter-Based Automatic Labeling of Speech Data for TTS System in Gujarati Language”, IALP 2013.
  45. Hemant Patil, Tanvina Patel, Swati Talesara, Nirmesh Shah, Hardik Sailor, Bhavik Vachhani, Janaki Akhani, Bhargav Kankariya, Yashesh Gaur and Vibha Prajapati, “Algorithm for Speech Segmentation at Syllable-Level for Text-to-Speech Synthesis System in Gujarati”, COCOSDA 2013.
  46. [TTS Consortium paper] Hemant A Patil, Tanvina B Patel, Nirmesh J Shah, Hardik B Sailor, Raghava Krishnan, G R Kasthuri, T. Nagarajan, Lilly Christina, Naresh Kumar, Veera Raghavendra, S P Kishore, S R M Prasanna, Nagaraj Adiga, Sanasam Ranbir Singh, Konjengbam Anand, Pranaw Kumar, Bira Chandra Singh, S L Binil Kumar, T G Bhadran, T Sajini, Arup Saha, Tulika Basu, K Sreenivasa Rao, N P Narendra, Anil Kumar Sao, Rakesh Kumar, Pranhari Talukdar, Purnendu Acharyaa, Somnath Chandra, Swaran Lata and Hema Murthy, “A Syllable-Based Framework for Unit Selection Synthesis in 13 Indian Languages”, COCOSDA 2013.
  • Reviewer: IEEE Journals, IEEE and ISCA Conferences, Invited Talks at Summer Schools