Publications

2024

• T. Lavanya, P. Vijayalakshmi, K. Mrinalini, and T. Nagarajan, "Higher order statistics-driven magnitude and phase spectrum estimation for speech enhancement", Computer Speech & Language, vol. 87, 2024.

2023

• S. Johanan Joysingh, P. Vijayalakshmi, and T. Nagarajan, "Chirp Group Delay-Based Onset Detection in Instruments with Fast Attack", Circuits, Systems, and Signal Processing, vol. 42, no. 3, pp. 1639–1662, 2023.
• T. A. Mariya Celin, P. Vijayalakshmi, and T. Nagarajan, "Data Augmentation Techniques for Transfer Learning-Based Continuous Dysarthric Speech Recognition", Circuits, Systems, and Signal Processing, vol. 42, no. 1, pp. 601–622, 2023.
• P. Vijayalakshmi, T. Nagarajan, Jayapriya Ramesh, Brathindara Suresh, Krithika Kandasamy, N. Nikhilesh, Narenraju Nagarajan, Johanan Joysingh Sathyasingh, Aiswarya Vijayakumar, and Mrinalini Kannan, "Development of a low-resource wearable continuous gesture-to-speech conversion system", Disability and Rehabilitation: Assistive Technology, vol. 18, no. 8, pp. 1441–1452, 2023.
• Nethraa Sivakumar, Pooja Srinivasan, Mrinalini Kannan, P. Vijayalakshmi, and T. Nagarajan, "PooRaa-Agri KG: An agricultural knowledge graph-based simplified multilingual query system", Expert Systems, vol. 40, no. 10, 2023.
• S. Johanan Joysingh, P. Vijayalakshmi, and T. Nagarajan, "Quartered Spectral Envelope and 1D-CNN-Based Classification of Normally Phonated and Whispered Speech", Circuits, Systems, and Signal Processing, vol. 42, no. 5, pp. 3038–3053, 2023.

2022

• Mrinalini K., P. Vijayalakshmi, and T. Nagarajan, "SBSim: A sentence BERT Similarity based evaluation metric for Indian language neural machine translation systems", IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 30, pp. 1396–1406, Mar. 2022.
• M. Nanmalar, P. Vijayalakshmi, and T. Nagarajan, "Literary and colloquial Tamil dialect identification", Circuits, Systems, and Signal Processing, pp. 4004–4027, Mar. 2022, doi: 10.1007/s00034-022-01971-2.
• Anushiya Rachel, Sreenidhi, P. Vijayalakshmi, and T. Nagarajan, "Incorporation of happiness in neutral speech by modifying time-domain parameters of emotive keywords", Circuits, Systems, and Signal Processing, vol. 41, pp. 2061–2087, Mar. 2022.
• P. Vijayalakshmi et al., "Development of a low-resource wearable continuous gesture-to-speech conversion system", Disability and Rehabilitation: Assistive Technology, Jan. 2022, doi: 10.1080/17483107.2021.2022787.
• V. Swati and P. Vijayalakshmi, "Forensic Speech Enhancement of Voiceprints and Speaker Identification under Mismatched conditions", in Proc. of IEEE Int. Conf. Electronics, Computing, Communication Technologies, 2022 (accepted for presentation).
• Abirami S., Anirudh L., and P. Vijayalakshmi, "Silent speech interface: an inversion problem", in Proc. of IEEE International Conference on Biosignals, Images and Instrumentation, Mar. 2022.

2021

• Indu Subramanian, Aishwarya Ponni P., Akilandeshwari R., Kaavya S., and P. Vijayalakshmi, "Speaker Identification in Vehicular Environment using GMM and BiLSTM", in Proc. of IEEE TEMSMET, Dec. 2021.
• Mrinalini K., P. Vijayalakshmi, and T. Nagarajan, "Feature-weighted AdaBoost classifier for punctuation prediction in Tamil and Hindi NLP systems", Expert Systems, Wiley, vol. 39, no. 3, Nov. 2021.
• M. Dhanalakshmi, T. Nagarajan, and P. Vijayalakshmi, "Significant sensors and parameters in assessment of dysarthric speech", Sensor Review, vol. 41, no. 3, pp. 271–286, Jul. 2021.
• Evangelin Glory N., P. Vijayalakshmi, and Satheesh Kumar G., "Development of Speech and Gesture Enabled Wheelchair system for Cerebral Palsy", in Proc. of IEEE ICSPC, Coimbatore, May 2021, pp. 620–624.

2020

• T. Lavanya, T. Nagarajan, and P. Vijayalakshmi, "Multi-level single-channel speech enhancement using a unified framework for estimating magnitude and phase spectra", IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 28, pp. 1315–1327, Apr. 2020.
• Mariya Celin T.A., T. Nagarajan, and P. Vijayalakshmi, "Data Augmentation using virtual microphone array synthesis and multi-resolution feature extraction for isolated word dysarthric speech recognition", IEEE Journal of Selected Topics in Signal Processing, vol. 14, no. 2, pp. 346–354, Feb. 2020.
• M. P. Actlin Jeeva, T. Nagarajan, and P. Vijayalakshmi, "Adaptive Multi-Band Filter Structure-based Far-End Speech Enhancement", IET Signal Processing, vol. 14, issue 5, pp. 288–299, Jun. 2020.
• P. Vijayalakshmi, M. Dhanalakshmi, and T. Nagarajan, "Assessment and intelligibility modification for dysarthric speakers", in Speech Technology and Text Analytics in Medicine and Healthcare, De Gruyter, vol. 1, ch. 3, pp. 67–94, Feb. 2020. ISBN: 978-1-5015-0126-5.
• Namrutha Sridhar B.V., Mrinalini K., and P. Vijayalakshmi, "Data annotation and multi-emotion classification for social media text", in Proc. of IEEE ICCSP, Jul. 2020, pp. 1015–1019.

2019

• T. A. Mariya Celin, G. Anushiya Rachel, T. Nagarajan, and 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, no. 2, pp. 187–197, Feb 2019.
• K. Mrinalini, T. Nagarajan, and P. Vijayalakshmi, "Pause-Based Phrase Extraction and Effective OOV Handling for Low-Resource Machine Translation Systems", ACM Transactions on Asian and Low Resource Language Information Processing, vol. 18, no. 2, pp. 12:1–12:22, Feb 2019.
• S. Johanan, P. Vijayalakshmi, and T. Nagarajan, "Development of Large Annotated Music Datasets using HMM based Forced Viterbi Alignment", IEEE TENCON'19, pp. 1298–1302, 2019.
• M. Nanmalar, P. Vijayalakshmi, and T. Nagarajan, "Literary and Colloquial Dialect Identification for Tamil using Acoustic Features", IEEE TENCON'19, pp. 1307–1312, 2019.
• T. Lavanya, K. Mrinalini, P. Vijayalakshmi, and T. Nagarajan, "Histogram Matching based Optimized Energy Redistribution for Near End Listening Enhancement", IEEE TENCON'19, pp. 1303–1306, 2019.

2018

• G. Anushiya Rachel, N. Sripriya, P. Vijayalakshmi, and 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, vol. 37, no. 5, pp. 2074–2097, May 2018.
• P. Vijayalakshmi, B. Ramani, M. P. Actlin Jeeva, and T. Nagarajan, "A Multilingual to Polyglot Speech Synthesizer for Indian Languages Using a Voice-Converted Polyglot Speech Corpus", Circuits, Systems and Signal Processing, vol. 37, no. 5, pp. 2142–2163, May 2018.
• M. Dhanalakshmi, T. A. Mariya Celin, T. Nagarajan, and P. Vijayalakshmi, "Speech-Input Speech-Output Communication for Dysarthric Speakers Using HMM-Based Speech Recognition and Adaptive Synthesis System", Circuits, Systems and Signal Processing, vol. 37, no. 2, pp. 674–703, Feb 2018.
• 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.

2017

• M. Dhanalakshmi, T. A. Mariya Celin, T. Nagarajan, and P. Vijayalakshmi, "Electromagnetic Articulograph Sensor-to-Sound Unit Mapping-Based Intelligibility Assessment of Dysarthric Speech", IEEE TENCON, Malaysia, Nov 2017, pp. 1784–1789.
• G. Anushiya Rachel, P. Vijayalakshmi, and T. Nagarajan, "Estimation of Glottal Closure Instants from Degraded Speech using a Phase-Difference-Based Algorithm", Computer, Speech, and Language, DOI: 10.1016/j.csl.2017.05.008, May 2017.
• V. Sherlin Solomi, P. Vijayalakshmi, and T. Nagarajan, "Exploiting Acoustic Similarities Between Tamil and Indian English in the Development of an HMM-based Bilingual Synthesizer", IET Signal Processing, vol. 11, no. 3, pp. 332–340, May 2017.