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Speech Lab SSN
Speech Lab publications

Publications

145+ papers, since 2004.

103 conference papers and 42 journal articles, plus granted patents and book chapters, spanning speech recognition, synthesis, translation, and assistive technology.

2026

  • M. P. Actlin Jeeva, P. Vijayalakshmi, Nuthi Ritishree, and Gangamohan Paidi, "Exploring Quartered Spectral Envelope as an Acoustic Biomarker for Classifying Asthmatic and Healthy Individuals", 2nd International Conference on Innovations in Mechanical, Robotics, Biomedical Computing and Engineering, pp. 1–6, 2026.
  • P. Vijayalakshmi, T. A. Maria Celin, T. Nagarajan, K. Ananthakrishnan, B. Sanjay and P. Gayathri, "Tamil Dysarthric Speech Data Collection: Challenges and Constraints", 2026 Twelfth International Conference on Bio Signals, Images, and Instrumentation (ICBSII), Chennai, India, 2026, pp. 1–6. DOI: 10.1109/ICBSII69710.2026.11479228.
  • Harikrishnan M and P. Vijayalakshmi, "A Frequency-Interval Perspective on Vivadi and Non-Vivadi Classification in Melakarta Ragas in Carnatic Music", Proceedings of the National Conference on Indian Knowledge Systems: Tradition, Culture and Technology, Sri Sivasubramaniya Nadar College of Engineering, India, Feb. 2026.

2025

  • Loghitha S, Pavithra S, P. Vijayalakshmi, Ramani B and T. Nagarajan, "A Vision-Based Framework for Indian Sign Language Recognition Using Spatiotemporal Skeleton Representations", Proceedings of the 2025 IEEE 4th International Conference on Data, Decision and Systems (ICDDS), Dharwad, India, Dec. 2025.
  • Shruti Chandrasekar, Vedajanaani R. S. and P. Vijayalakshmi, "Identify Training Data Subsets in GAN-Generated Medical Images", Proceedings of CLEF 2025, Madrid, Spain, Sep. 2025.
  • Shruti Chandrasekar, Vedajanaani R. S. and P. Vijayalakshmi, "Detecting Training Data Fingerprints in GAN-Generated Medical Images", Proceedings of CLEF 2025, Madrid, Spain, Sep. 2025.
  • Lavanya T, Harikrishnan Mahesh and P. Vijayalakshmi, "Interpretable Acoustic Features for Automated Severity Classification of Dysarthric Speech", Proceedings of SPELLL 2025, IIIT Kottayam, India, Dec. 2025.
  • Johanan Joysingh, Rohit Gupta, Ramnath, Nagarajan T., Vijayalakshmi P., "Mask cycleGAN-based whisper to normal speech conversion", IEEE ICSBII, Mar. 2025.
  • Anantha Krishnan, Anusharaj S, Atul Thukalan Binu, Swetha K, Vijayalakshmi P., "Cognitive activity and language classification for bilingual speakers using EEG signals", 2025.

2024

  • Diviya, K. N., K. Mrinalini, P. Vijayalakshmi, J. Thenmozhi, and T. Nagarajan. "DesiPayanam: developing an Indic travel partner." ICON 2024.
  • Muthuramalingam, Malarvizhi, Anushiya Rachel Gladston, P. Vijayalakshmi, and T. Nagarajan. "Chirp Group Delay based Feature for Speech Applications." ICON 2024.
  • B Sanjay, Priyadharshini M.K, Vijayalakshmi P, and Nagarajan T, "Severity Classification and Dysarthric Speech Detection using Self-Supervised Representations", ICON 2024.
  • Preethi Thinakaran, Anushiya Rachel Gladston, P Vijayalakshmi, T Nagarajan, Malarvizhi Muthuramalingam, and Sooriya S, "Utilizing POS-Driven Pitch Contour Analysis for Enhanced Tamil Text-to-Speech Synthesis", ICON 2024.
  • Shruti Jeyaraman, Anantha K. Krishnan, Vijayalakshmi P, and Nagarajan T., "Pronunciation scoring for dysarthric speakers with DNN-HMM based goodness of pronunciation (GoP) measure", ICON 2024.
  • B Sanjay, P Vijayalakshmi and Themozhi J., "Improved Medical Image Captioning Using Vision Transformers and Graph Networks", IEEE TENCON 2024.
  • MP Actlin Jeeva, P Vijayalakshmi, Nuthi Ritishree, Gangamohan Paidi, "Analysis of the Creaky Nature of Asthmatic Speakers Voice in Sustained Phonation", IEEE TENCON 2024.
  • Johanan Joysingh, S., P Vijayalakshmi and Nagarajan T, "Quartered Chirp Spectral Envelope for Whispered Vs Normal Speech Classification", IEEE TENCON 2024.
  • P H Keerthi, P Vijayalakshmi, Anushiya Rachel Gladston and T Nagarajan, "Analysis of Features for Dysarthria Severity Classification From Speech", IEEE TENCON 2024.

2022

  • V. Swati, P. Vijayalakshmi, "Forensic Speech Enhancement of Voiceprints and Speaker Identification under Mismatched Conditions," IEEE CONECCT 2022.
  • Abirami S., Anirudh L. and P. Vijayalakshmi, "Silent Speech Interface: An Inversion Problem", IEEE ICBSII 2022.

2021

  • Indu S., Indu Subramanian, Aishwarya Ponni P., Akilandeshwari R., Kaavya S., P. Vijayalakshmi, "Speaker Identification in Vehicular Environment using GMM and BiLSTM", TEMSMET 2021.
  • Evangelin Glory N., Vijayalakshmi P. and Satheesh Kumar G., "Development of Speech and Gesture Enabled Wheelchair System for Cerebral Palsy", IEEE ICSPC 2021.
  • Evangelin Glory N., Satheesh G. and Vijayalakshmi P., "Development of a Speech and Gesture-Enabled Wheelchair System for People with Cerebral Palsy", ARAM 2021.

2020

  • Namrutha Sridhar B.V., Mrinalini K. and Vijayalakshmi P., "Data Annotation and Multi-Emotion Classification for Social Media Text", IEEE ICCSP 2020.

2019

  • Johanan S., Vijayalakshmi P., Nagarajan T., "Development of Large Annotated Music Datasets using HMM based Forced Viterbi Alignment", IEEE TENCON 2019, pp. 1298–1302, Nov. 2019.
  • Nanmalar M., Vijayalakshmi P., Nagarajan T., "Literary and Colloquial Dialect Identification for Tamil using Acoustic Features", IEEE TENCON 2019, pp. 1303–1306, Nov. 2019.
  • Lavanya T., Mrinalini K., Vijayalakshmi P., Nagarajan T., "Histogram Matching based Optimized Energy Redistribution for Near End Listening Enhancement", IEEE TENCON 2019, pp. 1307–1312, Nov. 2019.
  • Gali Kavya Shree Sai, Ganapathi Ramanathan, Manne Muddu Reshma Priya and P. Vijayalakshmi, "Speech Enabled Virtual Assistant Using Image Captioning", National Conference on Information and Communication Technologies, Apr. 2019.
  • Jayapriya R., Johanan Joysingh S., Vijayalakshmi P., "Development of MEMS Sensor-Based Double Handed Gesture-to-Speech Conversion System", IEEE VITECoN 2019, pp. 1–6, Mar. 2019.

2018

  • G. Anushiya Rachel, Vijayalakshmi P., T. Nagarajan, "Significance of Radius in the Phase-Difference-Based Approach to the Estimation of Glottal Closure Instants", 2nd IEEE International Conference on Computer, Communication and Signal Processing, Chennai, India, Feb. 2018, pp. 187–191.
  • Nirmal Kumar, K. Mrinalini, Vijayalakshmi P., "Improving the Performance of Low-Resource SMT Using Neural-Inspired Sentence Generator", 2nd IEEE International Conference on Computer, Communication and Signal Processing, Chennai, India, Feb. 2018, pp. 192–195.
  • V. Aiswarya, N. Naren Raju, S. Johanan Joysingh, T. Nagarajan, Vijayalakshmi P., "HMM Based Sign Language to Speech Conversion System in Tamil", ICBSII 2018, pp. 206–212.

2017

  • M. Dhanalakshmi, T. A. Mariya Celin, T. Nagarajan, Vijayalakshmi P., "Electromagnetic Articulograph Sensor-to-Sound Unit Mapping-Based Intelligibility Assessment of Dysarthric Speech", IEEE TENCON 2017, Malaysia, pp. 1784–1789.
  • S. Johanan Joysingh, M. Nanmalar, G. Anushiya Rachel, V. Sherlin Solomi, Vijayalakshmi P., T. Nagarajan, "Development of a Speech-Enabled Interactive Enquiry System in Tamil for Agriculture", Tamil Internet Conference, Toronto, Canada, Aug. 2017.
  • K. Mrinalini, G. Anushiya Rachel, T. Nagarajan, Vijayalakshmi P., "Sentence-Medial Pause Identification for Tamil Synthesis System", Tamil Internet Conference, Toronto, Canada, Aug. 2017. (Best Paper Award)
  • D. S. K. Lena, Vijayalakshmi P., "Speech Enhancement in Vehicular Environments as a Front End for Robust Speech Recognizer", IEEE ICICCS 2017.
  • Ahyishashabana A., Lavanya T., Vijayalakshmi P., "Speaker Diarization for Conversational Speech Using Bayesian Information Criterion", 2nd International Conference on Recent Trends in Engineering and Technology, May 2017.

2016

  • T. A. Mariya Celin, T. Nagarajan, Vijayalakshmi P., "Dysarthric Speech Corpus in Tamil for Rehabilitation Research", IEEE TENCON 2016, Singapore, pp. 2612–2615.
  • Mrinalini K., Sangavi G., Vijayalakshmi P., "Performance Improvement of Machine Translation System Using LID and Post-Editing", IEEE TENCON 2016, Singapore, pp. 2136–2139.
  • Sherlin Solomi V., Anushiya Rachel G., Vijayalakshmi P., Nagarajan T., "Phone Mapping-Based Mixed Language Synthesizer for Tamil and Indian English", Tamil Internet Conference, 2016.
  • Mrinalini K., Vijayalakshmi P., "LID Based Post-Editing for Tamil Machine Translation System", Tamil Internet Conference, 2016.
  • Sangavi G., Mrinalini K., Vijayalakshmi P., "Analysis on Bilingual Machine Translation Systems for English and Tamil", IEEE ICCPEIC 2016.
  • Aarthi M., Vijayalakshmi P., "Sign Language to Speech Conversion", IEEE ICRTIT 2016.
  • Lavanya T., Vijayalakshmi P., "Cross-Lingual Adaptive Speech Synthesis for Indian Languages", ICIETET 2016, pp. 737–741.
  • Haripriya S., Actlin Jeeva M. P., Vijayalakshmi P., "Suppression of Colored Noise Using Subspace Modeling Techniques", ICIETET 2016, pp. 751–754.
  • Aparna V., Ramani B., Vijayalakshmi P., "Age and Gender Detection for Forensic Speech", ICIETET 2016, pp. 835–840.
  • Lavanya S., Ramani B., Vijayalakshmi P., "Multilingual Speech Recognition", ICIETET 2016, pp. 874–878.
  • Actlin Jeeva M. P., Nagarajan T., Vijayalakshmi P., "Formant-Filters Based Multi-Band Speech Enhancement Algorithm for Intelligibility Improvement", NCC 2016, IIT Guwahati, pp. 243–248.

2015

  • M. P. Actlin Jeeva, T. Nagarajan, Vijayalakshmi P., "Temporal Domain Filtering Approach for Multiband Speech Enhancement", International Conference on Microwave, Optical and Communication Engineering, IIT Bhubaneswar, Dec. 2015.
  • G. Anushiya Rachel, P. Vijayalakshmi and T. Nagarajan, "Estimation of Glottal Closure Instants from Telephone Speech Using a Group Delay-Based Approach that Considers Speech Signal as a Spectrum", INTERSPEECH 2015, Germany, pp. 1181–1185.
  • I. Janani Chellam, G. Anushiya Rachel, P. Vijayalakshmi and T. Nagarajan, "Prosodic Modification of Speech to Incorporate Happy and Sad Emotions", IEEE ICCPEIC 2015.
  • T. A. Mariya Celin and P. Vijayalakshmi, "Intelligibility Modification in Dysarthric Speech", IEEE ICCPEIC 2015.
  • K. Mrinalini and P. Vijayalakshmi, "Hindi-English Speech-to-Speech Translation System for Travel Expressions", IEEE ICCPEIC 2015.
  • M. Dhanalakshmi and P. Vijayalakshmi, "Intelligibility Modification on Dysarthric Speech Using HMM-Based Adaptive Synthesis System", IEEE ICoBE 2015, Malaysia.
  • R. Ayeswarya, B. Ramani and P. Vijayalakshmi, "Voice Conversion Using Parallel Corpora", NCMESP 2015.
  • M. Kiran Kumar, B. Ramani and P. Vijayalakshmi, "Text-Independent Speaker Identification System", NCMESP 2015.

2014

  • B. Ramani, M. P. Actlin Jeeva, P. Vijayalakshmi, T. Nagarajan, "Cross-Lingual Voice Conversion-Based Polyglot Speech Synthesizer for Indian Languages", INTERSPEECH 2014, Singapore, pp. 775–779.
  • V. Sherlin Solomi, M. S. Saranya, G. Anushiya Rachel, 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 2014, Bangkok, Thailand, pp. 1–4.
  • G. Anushiya Rachel, S. Sreenidhi, P. Vijayalakshmi, T. Nagarajan, "Incorporation of Happiness into Neutral Speech by Modifying Emotive-Keywords", IEEE TENCON 2014, Bangkok, Thailand, pp. 1–6.
  • Prasanna Venkatesh Sreenivasan, Nitin Narayan, Silesh Bharathwaaj Krishnamurthy, M. P. Actlin Jeeva, P. Vijayalakshmi, "Modified DCT-Based Speech Enhancement in Vehicular Environments", 16th IRF International Conference, Chennai, India, Oct. 2014, pp. 58–62.
  • Lilly Christina, P. Vijayalakshmi and T. Nagarajan, "Cross-Lingual Speaker Adaptation in HMM-Based Speech Synthesis", NCC 2014, IIT Kanpur, pp. 1–5.
  • T. Ramya, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, "Analysis on MAP and MLLR-Based Speaker Adaptation Technique in Speech Recognition", IEEE ICCPCT 2014, pp. 1753–1758. (Best Paper Award)
  • S. Sreenidhi, G. Anushiya Rachel, P. Vijayalakshmi, T. Nagarajan, "LP and TD-PSOLA-Based Incorporation of Happiness in Neutral Speech Using Time-Domain Parameters", IEEE ICCPCT 2014, pp. 1158–1162.

2013

  • V. Sherlin Solomi, S. Lilly Christina, Anushiya Rachel Gladston, Ramani B., 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 2013, Gurgaon, Nov. 2013.
  • Anushiya Rachel Gladston, S. Lilly Christina, V. Sherlin Solomi, Ramani B., P. Vijayalakshmi, T. Nagarajan, "Development and Analysis of Various Phone-Sized Unit-Based Speech Synthesizers", Oriental COCOSDA 2013, Gurgaon, Nov. 2013.
  • Ramani B., Actlin Jeeva M. P., P. Vijayalakshmi, T. Nagarajan, "Voice Conversion Based Multilingual to Polyglot Speech Synthesizer for Indian Languages", IEEE TENCON 2013, China, pp. 1–4.
  • Ramani B., S. Lilly Christina, G. Anushiya Rachel, Sherlin Solomi V., 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, 2013.
  • M. Niranjana Priyadarshini, P. Vijayalakshmi, "Effect of Speech Rate on Synthetic Speech Quality in Phoneme and Consonant–Vowel Unit Selection and HMM-Based Speech Synthesisers", ICCCC 2013, pp. 283–287.
  • J. Florence, P. Vijayalakshmi, "Objective Measures for the Evaluation of Synthesized Speech Signal", ICCCC 2013, pp. 288–293.
  • Megha S., Aarish R., Harimadhav K., P. Vijayalakshmi, "GMM-Based Voice Conversion for an Unrestricted Domain Speech Synthesizer", NCETICT 2013.
  • M. P. Actlin Jeeva, B. Ramani, P. Vijayalakshmi, "Performance Evaluation of Unit Selection-Based Speech Synthesizers for Indian Languages using Festvox Framework", NCSCV 2013, pp. 307–310.
  • M. Anbu Swarna Priyanka, V. Sherlin Solomi, P. Vijayalakshmi, T. Nagarajan, "Speech Recognition System Developed Using Multiresolution Feature Extraction (MRFE) for Sparse Data", NCSCV 2013, pp. 302–306.
  • S. Magdalene Mahiba, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, "Speaker Adaptation Using MLLR and MAP Techniques in Speech Recognition System", NCSCV 2013, pp. 350–353.
  • S. Johanan Joy Singh, G. Anushiya Rachel, P. Vijayalakshmi, T. Nagarajan, "Incorporating Emotions into Neutral Speech by Modifying Glottal Closure Instants", NCSCV 2013, pp. 339–343.
  • M. P. Actlin Jeeva, B. Ramani, P. Vijayalakshmi, "Performance Evaluation and Comparison of Multilingual Speech Synthesizers for Indian Languages", ICRTIT 2013, pp. 590–595.
  • M. Anbu Swarna Priyanka, V. Sherlin Solomi, P. Vijayalakshmi, T. Nagarajan, "Multiresolution Feature Extraction (MRFE) Based Speech Recognition System", ICRTIT 2013, pp. 152–156.
  • S. Magdalene Mahiba, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, "Analysis of Cross-Gender Adaptation Using MAP and MLLR in Speech Recognition Systems", ICRTIT 2013, pp. 387–392.
  • G. Anushiya Rachel, S. Johanan Joy Singh, P. Vijayalakshmi, "LabView and Digital Signal Processor Implementation of Channel Vocoder Based Model of a Cochlear Implant", ICRTIT 2013, pp. 142–146.
  • Ramani B., Sherlin S., Anushiya Rachel, Lilly Christina S., P. Vijayalakshmi, Nagarajan Thangavelu, Hema A. Murthy, "Development and Evaluation of Unit Selection and HMM-Based Speech Synthesis for Tamil", NCC 2013, pp. 1–5.

2012

  • M. Saranya, P. Vijayalakshmi and Nagarajan Thangavelu, "Improving the Intelligibility of Dysarthric Speech by Modifying System Parameters, Retaining Speaker's Identity", ICRTIT 2012, pp. 60–65.
  • M. Gandhimathy and P. Vijayalakshmi, "Linear Prediction Residual Error Based Assessment of Dysarthric Speech", International Conference on Computing and Control Engineering, 2012.
  • S. Lilly Christina, P. Vijayalakshmi and Nagarajan Thangavelu, "HMM Based Speech Recognition System for the Dysarthric Speech Evaluation of Articulatory Subsystem", ICRTIT 2012, pp. 54–59.
  • Anushiya Rachel Gladston, P. Vijayalakshmi and Nagarajan Thangavelu, "Improving Speech Intelligibility in Cochlear Implants Using Vocoder-Centric Acoustic Models", ICRTIT 2012, pp. 66–71.

2011

  • Preethi Mahadevan, Nagarajan T., Pavithra B., S. Shri Ranjani, Vijayalakshmi P., "Design of a Lab Model of a Digital Speech Processor for Cochlear Implant", IEEE TENCON 2011, Indonesia, pp. 307–311.
  • Preethi M., Pavithra B., Shriranjani S., Vijayalakshmi P., and Nagarajan T., "Cochlear Implant Model Using Mel-Frequency Cepstral Coefficients", CIAP 2011.
  • P. Vijayalakshmi, Anu Abraham, B. Bharathi and T. Nagarajan, "Reducing the Complexity of a Triphone-Based Speech Recognition System Based on Degree of Coarticulation", IEEE Techsym 2011, pp. 175–179.
  • B. Bharathi, P. Vijayalakshmi and T. Nagarajan, "Speaker Identification Using Utterances Correspond to Speaker-Specific Text", IEEE Techsym 2011, pp. 171–174.
  • S. Harish, P. Vijayalakshmi and T. Nagarajan, "Significance of Segmentation in Phoneme-Based Tamil Speech Recognition System", IEEE ICECT 2011, pp. 212–215.

2010

  • Anu Abraham, P. Vijayalakshmi and T. Nagarajan, "Pole-Focused Linear Prediction-Based Spectrogram for Coarticulation Analysis", IEEE Techsym 2010, pp. 94–97. (Best Paper Award)

2009

  • V. Surabhi, P. Vijayalakshmi, T. Steffina Lily and Ra. V. Jayanthan, "Assessment of Laryngeal Dysfunctions of Dysarthric Speakers", IEEE EMBC 2009, Minnesota, pp. 2908–2911.
  • Ra. V. Jayanthan, P. Vijayalakshmi and P. Mukesh Kumar, "Auditory Model Based Acoustic CI Simulations for Patients with Profound Hearing Loss", CIAP 2009.
  • P. Vijayalakshmi, P. Mukesh Kumar, Ra. V. Jayanthan and T. Nagarajan, "Cochlear Implant Models Based on Critical Band Filters", IEEE TENCON 2009, Singapore.
  • P. Vijayalakshmi, T. Nagarajan and Ra. V. Jayanthan, "Selective Pole Modification-Based Technique for the Analysis and Detection of Hypernasality", IEEE TENCON 2009.
  • N. Sripriya, P. Vijayalakshmi, C. Arun Kumar and T. Nagarajan, "Estimation of Instants of Significant Excitation from Speech Signal Using Temporal Phase Periodicity", IEEE TENCON 2009.

2008

  • T. Nagarajan and P. Vijayalakshmi, "Discriminative Optimization of HMM Topology Using Product of Gaussians", NCC 2008, IIT Bombay, Mumbai, pp. 182–185.

2006

  • T. Nagarajan, P. Vijayalakshmi and Douglas O'Shaughnessy, "Combining Multiple-Sized Sub-Word Units in a Speech Recognition System Using Baseform Selection", ICSLP 2006, Pittsburgh, pp. 1595–1597.
  • P. Vijayalakshmi, M. R. Reddy and Douglas O'Shaughnessy, "Assessment of Articulatory Sub-Systems of Dysarthric Speech Using an Isolated-Style Speech Recognition System", ICSLP 2006, Pittsburgh, pp. 981–984.
  • P. Vijayalakshmi and M. R. Reddy, "Assessment of Dysarthric Speech and Analysis on Velopharyngeal Incompetence", IEEE EMBC 2006, New York, pp. 3762–3765.

2005

  • P. Vijayalakshmi and Douglas O'Shaughnessy, "Assessment of Dysarthric Speech Using Phoneme Recognition System", ICBME 2005, Singapore.
  • P. Vijayalakshmi and M. R. Reddy, "Detection of Hypernasality Using Statistical Pattern Classifiers", INTERSPEECH/Eurospeech 2005, Lisbon, Portugal, pp. 701–704.
  • P. Vijayalakshmi and M. R. Reddy, "The Analysis of Band-Limited Hypernasal Speech Using Group Delay Based Formant Extraction Technique", INTERSPEECH/Eurospeech 2005, Lisbon, Portugal, pp. 665–668.
  • P. Vijayalakshmi and M. R. Reddy, "Analysis of Degree of Dysarthria Using Automatic Speech Recognition System", IASTED 2005, Innsbruck, Austria, pp. 723–726.

2004

  • P. Vijayalakshmi and M. R. Reddy, "Analysis of Hypernasality by Synthesis", International Conference on Spoken Language Processing (ICSLP), Jeju, South Korea, Oct. 2004, pp. 525–528.

Granted Patents

  • P. Vijayalakshmi, N. Naren Raju and V. Aishwarya, "Hidden Markov model-based sign language-to-speech conversion system in Tamil", Patent Number: 530321, Application Number: 201841038594.
  • P. Vijayalakshmi, T. Nagarajan and T.A. Mariya Celin, "A Speech-input Speech-output Communication Aid for Speakers with Cerebral Palsy", Patent Number: 542440, Application Number: 201941031287.

Book Chapters

  • P. Vijayalakshmi, T. A. Mariya Celin, and T. Nagarajan, "Selective pole modification-based technique for the analysis and detection of hypernasality", Part I, Chapter 2, Signal and Acoustic Modeling for Speech and Communication Disorders, De Gruyter Series in Speech Technology and Text Mining in Medicine and Healthcare (ISBN: 978-1-5015-0241-5, ISSN: 2329-5198), pp. 33–68, Dec. 2018.
  • P. Vijayalakshmi, M. Dhanalakshmi and T. Nagarajan, "Assessment and intelligibility modification for dysarthric speakers", Part I, Chapter 3, De Gruyter Series in Speech Technology and Text Analytics in Medicine and Healthcare, pp. 67–94, Feb. 2020. ISBN: 978-1-5015-0126-5.