Dr. G. Anushiya Rachel is an Assistant Professor in the Department of Computer Science and Engineering at Shiv Nadar University, Chennai. Experience: 4.5 years in teaching and 7 years of pure research experience. She completed her B.E. in Electronics and Communication Engineering and M.E. in Applied Electronics. Subsequently she was a full-time research scholar and Project Officer at SSN College of Engineering. During this period, she was a part of projects funded by MeitY, Tamil Virtual Academy, and Murasu Systems Sdn Bhd, Malaysia. She worked extensively on text-to-speech synthesis and helped develop synthesizers for Indian languages and Malaysian Tamil, and has also worked on automatic speech recognition and emotional speech synthesis. Her PhD work focussed on estimating glottal closure instants from speech signals and she completed the same in the year 2019. She then went on to work as an Assistant Professor at Karunya Institute of Technology and Sciences and VIT Chennai, before joining SNU Chennai. She has over 20 publications in reputed conferences and journals, has worked on Samusng PRISM projects in the field of speech and language processing, and her team won first place at the Indian Language TTS Development Challenge 2020, organized by IIT Madras and CDAC Mumbai, for the development of a Tamil text-to-speech synthesis system.

Work Experience

• 2023 till date: Assistant Professor, Department of Computer Science and Engineering, Shiv Nadar University, Chennai
• 2022 – 2023: Assistant Professor, School of Computer Science Engineering, Vellore Institute of Technology, Chennai
• 2019 – 2022: Assistant Professor, Department of Electronics and Communication Engineering, Karunya Institute of Technology and Sciences, Coimbatore

Project 

1.Title :Estimation of Frequency Importance Functions for Tamil and Hindi

• Investigators : Dr. G. Anushiya Rachel, Dr. T. Nagarajan
• Funding Agency : HCL Technologies Limited
• Fund Allocated : 5.14 lakh
• Project Duration : 2024 – 2025
• Status : Ongoing

2.Title :NLTM BHASHINI – Prosody Modelling

• Investigators : Dr. T. Nagarajan (PI), Dr. P. Vijayalakshmi (Co-PI), Dr. G. Anushiya Rachel (Co-PI)
• Funding Agency : Ministry of Electronics and Information Technology (MeitY)
• Fund Allocated : 98.41 lakh
• Project Duration : 2022 – 2026
• Status : Ongoing

Publications:

(Journals – 7, Book chapters – 1, Conferences – 23)

1.Journals

1. P.Vijayalakshmi, Anushiya Rachel Gladston, B. Ramani, M.P. Actlin Jeeva, K. Anantha Krishnan, T. Lavanya, T. Nagarajan, “Leveraging synthetic speech: TTS-driven data augmentation for effective dysarthric speech recognition”, Computer Speech & Language, Vol. 100, 2026.
2. Anushiya Rachel Gladston, S. Sreenidhi, P. Vijayalakshmi, T. Nagarajan, “Incorporation of Happiness in Neutral Speech by Modifying Time-Domain Parameters of Emotive-Keywords”, Circuit Systems and Signal Processing, Springer, Vol. 41, Issue 4, pp. 2061 – 2087, Apr. 2022.
3. Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Analysis of Algorithms to Estimate Glottal Closure Instants from Speech Signals”, International Journal of Speech Technology, Springer, Vol. 23, Issue 4, pp. 825 – 849, Sep. 2020.
4. T.A. Mariya Celin, Anushiya Rachel Gladston, T. Nagarajan, P. Vijayalakshmi, “A Weighted Speaker-Specific Confusion Transducer-Based Augmentative and Alternative Speech Communication Aid for Dysarthric Speakers”, IEEE Transactions on Neural Systems and Rehabilitation Engineering, Vol. 27, Issue 2, pp. 187 – 197, Feb. 2019.
5. Anushiya Rachel Gladston, N. Sripriya, P. Vijayalakshmi, T. Nagarajan, “Significance of Differenced EGG Signal as a Spectrum in Phase Difference Computation for the Estimation of Glottal Closure Instants”, Circuits, Systems, and Signal Processing, Springer, Vol. 37, Issue 5, pp. 2074 – 2097, May 2018.
6. Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Estimation of Glottal Closure Instants from Degraded Speech using a Phase-Difference-Based Algorithm”, Computer Speech and Language, Elsevier, Vol. 46, pp. 136 – 153, Nov. 2017.
7. Anushiya Rachel Gladston, V. Sherlin Solomi, K. Naveenkumar P. Vijayalakshmi and T. Nagarajan, “A small footprint context-independent HMM-based speech synthesizer for Tamil”, International Journal of Speech Technology, Springer, Vol. 18, No.3, pp. 405 – 418, Sep. 2015.

2.Book Chapter

1. Anushiya Rachel Gladston, Sushanta Kumar Pani, “Generative Models for Human-Like Speech Synthesis: Evolution, Trends and the Road Ahead”, Chapter 4: Generative AI Unleashed: Advancements, Transformative Applications and Future Frontiers, IET, pp. 51-68, Jun. 2025.

3.Conferences

1. Ramassamy Elangovan, I Irfan Ahmed, S. Kayalvizhi, Anushiya Rachel Gladston, “A Multilingual Indic Speech-Breath Dataset and CNN–BiLSTM Framework for Robust Breathing Pattern Estimation from Speech”, IEEE APSIPA Annual Summit and Conference, Bangkok, Thailand, 2026.
2. Sudhanshu Srivatsava, Malarvizhi, Preethi Thinakaran, Keshav Agarwal, Anushiya Rachel Gladston, Nagarajan T, Hema A Murthy, “Fast and small footprint Hybrid HMM-HiFiGAN based system for speech synthesis in Indian languages”, Evaluation and Benchmarking of AI Applications in Indian Languages Conference, CIIL, Mysore, India, 2025.
3. Preethi Thinakaran, Anushiya Rachel Gladston, Vijayalakshmi P, Nagarajan T, Malarvizhi Muthuramalingam, Sooriya S, “Utilizing POS-Driven Pitch Contour Analysis for Enhanced Tamil Text-to-Speech Synthesis”, 21st International Conference on Natural Language Processing, India, 2024.
4. Malarvizhi Muthuramalingam, Anushiya Rachel Gladston, Vijayalakshmi P, Nagarajan T, “Chirp Group Delay-Based Feature for Speech Applications”, 21st International Conference on Natural Language Processing, India, 2024.
5. P H Keerthi, P Vijayalakshmi, Anushiya Rachel Gladston, T Nagarajan, “Analysis of Features for Dysarthria Severity Classification from Speech”, IEEE TENCON, Singapore, Dec. 2024.
6. MP Actlin Jeeva, P Vijayalakshmi, Nuthi Ritishree, Gangamohan Paidi, Anushiya Rachel Gladston, “Analysis of the Creaky Nature of Asthmatic Speakers Voice in Sustained Phonation”, IEEE TENCON, Singapore, Dec. 2024.
7. Anushiya Rachel Gladston, K. V. Pradeep, “Exploring Solutions for Text-to-Speech Synthesis of Low-Resource Languages”, 4th IEEE International Conference on Signal Processing and Communication (ICSPC), Coimbatore, India, Mar. 2023, pp. 168 – 172. (Received the best paper award)
8. Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Significance of Radius in the Phase-Difference-Based Approach to the Estimation of Glottal Closure Instants”, 2nd IEEE Int. Conf. on Computer, Communication and Signal Processing, Chennai, India, Feb. 2018, pp. 187 – 191.
9. S.Johanan Joysingh, M. Nanmalar, Anushiya Rachel Gladston, V. Sherlin Solomi, P. Vijayalakshmi, T. Nagarajan, “Development of a Speech-Enabled Interactive Enquiry System in Tamil for Agriculture”, Tamil Internet Conference, Toronto, Canada, Aug. 2017.
10. K.Mrinalini, Anushiya Rachel Gladston, T. Nagarajan, P. Vijayalakshmi, “Sentence-Medial Pause Identification for Tamil Synthesis System”, Tamil Internet Conference, Toronto, Canada, Aug. 2017.
11. V.Sherlin Solomi, Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Phone Mapping-based Mixed-language synthesizer for Tamil and Indian English”, Tamil Internet Conference, Gandhigram Rural Institute, Dindigul, India, Sep. 2016.
12. Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Estimation of Glottal Closure Instants from Telephone Speech using a Group Delay-Based Approach that Considers Speech Signal as a Spectrum”, INTERSPEECH, Dresden, Germany, Sep. 2015, pp. 1181-1185.
13. I.Janani Chellam, Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Prosodic modification of speech to incorporate happy and sad emotions,” Int. Conf. on Computation of Power, Energy, Information and Communication (ICCPEIC), Chennai, India, 2015, pp. 183-188.
14. V.Sherlin Solomi, M. S. Saranya, Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Performance Comparison of KLD and PoG Metrics for Finding the Acoustic Similarity Between Phonemes for the Development of a Polyglot Synthesizer”, IEEE TENCON, Bangkok, Thailand, Oct. 2014, pp. 1 – 4.
15. Anushiya Rachel Gladston, S. Sreenidhi, P. Vijayalakshmi, T. Nagarajan, “Incorporation of Happiness into Neutral Speech by Modifying Emotive-Keywords”, IEEE TENCON, Bangkok, Thailand, Oct. 2014, pp. 1 – 6.
16. S.Sreenidhi, Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “LP and TD-PSOLA-Based Incorporation of Happiness in Neutral Speech Using Time-Domain Parameters”, in Proc. of IEEE Int. Conf. on Circuit, Power and Computing Technologies (ICCPCT), 2014, pp. 1158 – 1162.
17. Anushiya Rachel Gladston, S. Lilly Christina, V. Sherlin Solomi, B. Ramani, P. Vijayalakshmi, T. Nagarajan, “Development and Analysis of Various Phone-Sized Unit-Based Speech Synthesizers”, Oriental COCOSDA, Gurgaon, India, 2013, pp. 1 – 5.
18. V.Sherlin Solomi, S. Lilly Christina, Anushiya Rachel Gladston, B. Ramani, P. Vijayalakshmi, T. Nagarajan, “Analysis on Acoustic Similarities between Tamil and English Phonemes using Product of Likelihood-Gaussians for an HMM-Based Mixed-Language Synthesizer”, Oriental COCOSDA, Gurgaon, India, 2013, pp. 1 – 5.
19. B.Ramani, S. Lilly Christina, Anushiya Rachel Gladston, V. Sherlin Solomi, Mahesh Kumar Nandwana, Anusha Prakash, Aswin Shanmugam, Raghava Krishnan, S. Kishore Prahalad, K. Samudravijaya, P. Vijayalakshmi, T. Nagarajan and Hema Murthy, “A Common Attribute based Unified HTS Framework for Speech Synthesis in Indian Languages”, ISCA – SSW8, Barcelona, Spain, 2013, pp. 291 – 296.
20. Anushiya Rachel Gladston, S. Johanan Joysingh, P. Vijayalakshmi, “LabVIEW and Digital Signal Processor Implementation of Channel Vocoder-Based Model of a Cochlear Implant”, in Int. Conf. on Recent Trends in Information Technology (ICRTIT), Chennai, 2013, pp. 142 – 146.
21. B.Ramani, V. Sherlin Solomi, Anushiya Rachel Gladston, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, Hema A Murthy, “Development and Evaluation of Unit Selection and HMM-based Speech Synthesis for Tamil”, National Conference on Communication (NCC), Delhi, India, 2013, pp. 1 – 5.
22. S.Johanan Joysingh, Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Incorporating Emotions into Neutral Speech by Modifying Glottal Closure Instants”, in Proc. of National Conf. on Signal Processing, Communication and VLSI Design (NCSCV’13), 2013, pp. 339 – 343.
23. Anushiya Rachel Gladston, P. Vijayalakshmi, T. Nagarajan, “Improving Speech Intelligibility in Cochlear Implants Using Vocoder-Centric Acoustic Models”, Proc. of the Second Int. Conf. on Recent Trends in Information Technology (ICRTIT), Chennai, 2012, pp. 66 – 71.

Area of Research

• Speech Technology – Speech signal processing, text-to-speech synthesis, automatic speech recognition
• Machine Learning