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Publications

2022

  1. Johanan Joysingh S., P. Vijayalakshmi and T. Nagarajan, “Chirp Group Delay based Onset Detection in Instruments with Fast Attack” Circuit systems and signal processing, pp. 1- 24, Sep. 2022.
  2. Maria Celin T. A., P. Vijayalakshmi and T. Nagarajan, “Data Augmentation Techniques for Transfer Learning-based continuous dysarthric speech recognition”, Circuits, systems and signal processing, pp. 1 - 22, Aug. 2022
  3. 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 (TASLP), Vol. 30, pp. 1396 - 1406, Mar. 2022
  4. M. Nanmalar, P. Vijayalakshmi, T. Nagarajan, “Literary and colloquial Tamil dialect identification”, Circuits, systems and signal processing, 2022. pp. 4004-4027, DOI: -10.1007/s00034-022-01971-2, Mar. 2022
  5. 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, 2022, Vol. 41, pp. 2061 - 2087, Mar. 2022
  6. P. Vijayalakshmi, Nagarajan, T., Jayapriya, R, Brathindara, S., Krithika, K., Nikhilesh, N. Naren Raju, N. Johanan Joysingh, S., Aiswarya, V. Mrinalini, K., "Development of a low-resource wearable continuous gesture-to-speech conversion system", Disability and Rehabilitation: Assistive Technology. DOI: 10.1080/17483107.2021.2022787. Jan. 2022.
  7. V. Swati, 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)
  8. Abirami. S, Anirudh. L and P. Vijayalakshmi, “Silent speech interface: an inversion problem”, in proceedings of IEEE International conference on biosignals, images and instrumentation, Mar. 2022

2021

  1. Indu Subramanian, Aishwarya Ponni P., Akilandeshwari R., Kaavya S., P. Vijayalakshmi, “Speaker Identification in Vehicular Environment using GMM and BiLSTM”, 2021 IEEE International Conference on Technology, Engineering, Management for Societal impact using Marketing, Entrepreneurship and Talent (TEMSMET), Dec. 2021.
  2. Mrinalini K, Vijayalakshmi P, Nagarajan T, "Feature-weighted AdaBoost classifier for punctuation prediction in Tamil and Hindi NLP systems", Expert Systems, Wiley, Vol. 39, No. 3, Nov 2021.
  3. M. Dhanalakshmi, T. Nagarajan, P. Vijayalakshmi, 'Significant sensors and parameters in assessment of dysarthric speech', Sensor Review, Vol. 41 No. 3, pp. 271-286, July 2021.
  4. Evangelin Glory.N, Vijayalakshmi.P and Satheesh Kumar.G “Development of Speech and Gesture Enabled Wheelchair system for Cerebral Palsy”, IEEE International Conference on Signal Processing and Communication - (ICSPC) 13-14 May 2021 Coimbatore, pp. 620-624.

2020

  1. 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
  2. Mariya Celin, T.A, Nagarajan T 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 on signal processing, Vol. 14, No. 2, pp. 346-354, Feb. 2020.
  3. M. P. Actlin Jeeva, T. Nagarajan, P. Vijayalakshmi, "Adaptive Multi-Band Filter Structure-based Far-End Speech Enhancement", IET Signal Processing, Vol. 14, Issue 5 pp. 288-299, Jun. 2020.
  4. P. Vijayalakshmi, M. Dhanalakshmi and T. Nagarajan "Assessment and intelligibility modification for dysarthric speakers" Part I, Chapter 3 to De Gruyter Series in Speech Technology and Text Analytics in Medicine and Healthcare, pp. 67 - 94, Feb. 2020. ISBN: 978-1-5015-0126-5.
  5. Namrutha Sridhar B.V, Mrinalini K, and Vijayalakshmi P, "Data annotation and multi-emotion classification for social media text", in proceedings of International Conference on Communication and Signal Processing (ICCSP), IEEE, pp. 1015-1019, July, 2020.

2019

  1. T. A. Mariya Celin, G. Anushiya Rachel, 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.
  2. K. Mrinalini, T. Nagarajan, 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, Issue 2, pp. 12:1-12:22, Feb 2019.
  3. S. Johanan, P. Vijayalakshmi, T. Nagarajan, "Development of Large Annotated Music Datasets using HMM based Forced Viterbi Alignment", IEEE TENCON'19, pp. 1298-1302, 2019.
  4. M. Nanmalar, P. Vijayalakshmi, T. Nagarajan, "Literary and Colloquial Dialect Identification for Tamil using Acoustic Features", IEEE TENCON'19, pp. 1307-1312, 2019.
  5. T. Lavanya, K. Mrinalini, P. Vijayalakshmi, T. Nagarajan, "Histogram Matching based Optimized Energy Redistribution for Near End Listening Enhancement", IEEE TENCON'19, pp. 1303-1306, 2019.

2018

  1. G. Anushiya Rachel, 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, Vol. 37, Issue 5, pp. 2074 – 2097, May 2018.
  2. P. Vijayalakshmi, B. Ramani, M. P. Actlin Jeeva, 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, Issue 5, pp. 2142 – 2163, May 2018.
  3. M. Dhanalakshmi, T. A. Mariya Celin, T. Nagarajan, 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, Issue 2, pp. 674 – 703, Feb. 2018.
  4. 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

  1. M. Dhanalakshmi, T. A. Mariya Celin, T. Nagarajan, P. Vijayalakshmi, “Electromagnetic Articulograph Sensor-to-Sound Unit Mapping-Based Intelligibility Assessment of Dysarthric Speech”, IEEE TENCON, Malaysia, Nov. 2017, pp. 1784 - 1789.
  2. G. Anushiya Rachel, P. Vijayalakshmi, 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.
  3. V. Sherlin Solomi, P. Vijayalakshmi, T. Nagarajan, "Exploiting Acoustic Similarities Between Tamil and Indian English in the Development of an HMM-based Bilingual Synthesizer", IET Signal Processing, Vol. 11, Issue 3, pp. 332-340, May 2017.

2016

  1. M. P. Actlin Jeeva, T. Nagarajan, P. Vijayalakshmi, "DCT derived spectrum-based speech enhancement algorithm using temporal-domain multiband filtering", IET Signal Processing, pp. 965-980, Vol. 10, Issue 8, Oct. 2016, DOI: 10.1049/iet-spr.2016.0125.
  2. T. A. Mariya Celin, T. Nagarajan, P. Vijayalakshmi, "Dysarthric Speech Corpus in Tamil for Rehabilitation Research", IEEE TENCON, Singapore, pp. 2612 - 2615, Nov. 2016.
  3. K. Mrinalini, G. Sangavi, P. Vijayalakshmi, "Performance Improvement of Machine Translation System using LID and Post-editing", IEEE TENCON, Singapore, pp. 2136 - 2139, Nov. 2016.
  4. V. Sherlin Solomi, G. Anushiya Rachel, P. Vijayalakshmi, T. Nagarajan, "Phone Mapping-based Mixed-language synthesizer for Tamil and Indian English", Tamil Internet Conference, Gandhigram Rural Institute, Dindigul, Sep. 2016. (Best paper award)
  5. K. Mrinalini, P. Vijayalakshmi, "LID based Post-Editing for Tamil Machine Translation system", Tamil Internet Conference, Gandhigram Rural Institute, Dindigul, Sep. 2016.
  6. M. P. Actlin Jeeva, T. Nagarajan, P. Vijayalakshmi, "Formant filters-based multiband speech enhancement algorithm for intelligibility improvement", NCC, IIT Guwahati, pp. 243 - 248, Mar. 2016.
  7. B. Ramani, M. P. Actlin Jeeva, P. Vijayalakshmi, T. Nagarajan, "A Multi-level GMM-Based Cross-Lingual Voice Conversion Using Language-Specific Mixture Weights for Polyglot Synthesis", Circuits, Systems and Signal Processing, Vol. 35, Issue 4, pp. 1283-1311, Apr. 2016.

2015

  1. G. Anushiya Rachel, 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, Vol. 18, Issue 3, pp. 405 - 418, Sep. 2015.
  2. N. Sripriya, T. Nagarajan, "Estimation of glottal closure instants considering the speech signal as a spectrum", IET Electronic Letters, Vol. 51, Issue 8, pp. 649 - 651, Apr. 2015.
  3. M. P. Actlin Jeeva, P. Vijayalakshmi, T. Nagarajan, "Temporal-Domain Filtering Approach for Multiband Speech Enhancement", International Conference on Microwave, Optical and Communication Engineering, IIT Bhubaneswar, pp. 385-388, Dec. 2015.
  4. G. Anushiya Rachel, 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 2015, Dresden, Germany, pp. 1181-1185, Sep. 2015.

2014

  1. B.Bharathi, T. Nagarajan, "Speaker verification using speaker-specific-text", in WSEAS Transactions on Signal Processing, Vol.10, pp. 320-330, Jul. 2014.
  2. 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, Sep. 2014.
  3. Kishore Prahallad, Anandaswarup Vadapalli, Santosh Kesiraju, Hema A Murthy, Swaran Lata, T. Nagarajan, Mahadeva Prasanna, Hemant Patil, Anil Kumar Sao, Simon King, Alan W Black and Keiichi Tokuda, "The Blizzard Challenge 2014", Singapore, Sep. 2014.
  4. 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, Bangkok, Thailand, pp. 1 - 4, Oct. 2014.
  5. G. Anushiya Rachel, S. Sreenidhi, P. Vijayalakshmi, T. Nagarajan, "Incorporation of Happiness into Neutral Speech by Modifying Emotive-Keywords", IEEE TENCON, Bangkok, Thailand, pp. 1 - 6, Oct. 2014.
  6. T. Ramya, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, "Analysis on MAP and MLLR-Based Speaker Adaptation Technique in Speech Recognition", IEEE Int. Conf. on Circuit, Power and Computing Technologies (ICCPCT), pp. 1753 - 1758, Mar. 2014. (Best paper award)
  7. 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 Int. Conf. on Circuit, Power and Computing Technologies (ICCPCT), pp. 1158 - 1162, Mar. 2014.
  8. Lilly Christina, P. Vijayalakshmi and T. Nagarajan, "Cross-lingual speaker adaptation in HMM-based speech synthesis" NCC, IIT Kanpur, pp. 1 - 5, Mar. 2014.
  9. Anusha Prakash, M. Ramasubba Reddy, T. Nagarajan and Hema A Murthy "An Approach to Building Language-Independent Text-to-Speech Synthesis for Indian Languages", NCC, IIT Kanpur, pp. 1 - 5, Mar. 2014.

2013

  1. H. A. Patil, T. B. Patel, N. J. Shah, H. B.Sailor, R. Krishnan, G.R. Kasthuri, T. Nagarajan, S. L. Christina, N. Kumar, V. Raghavendra, S. P. Kishore, S. R. M. Prasanna, N.Adiga, S. R.Singh, K. Anand, P. Kumar, B.C.Singh, S. L. Binil Kumar, T. G. Bhadran, T.Sajini, A. Saha, T. Basu, K.S. Rao, N. P. Narendra, A. K. Sao, R. Kumar, P. Talukdar, P. Acharyaa, S. Chandra, S. Lata, H. A. Murthy, "A syllable-based framework for unit selection synthesis in 13 Indian languages", Oriental COCOSDA/CASLRE 2013, Gurgaon, India, pp. 1 - 8, Nov. 2013.
  2. G. Anushiya Rachel, 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/CASLRE 2013, Gurgaon, India, pp. 1 - 5, Nov. 2013.
  3. N. Sripriya, T. Nagarajan, "Estimation of instants of significant excitation using accumulated energy function of DCT" in the 16th international conference, Oriental COCOSDA/CASLRE 2013, Gurgaon, India, pp. 1 - 6, Nov. 2013.
  4. V. Sherlin Solomi, S. Lilly Christina, G. Anushiya Rachel, 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/CASLRE 2013, Gurgaon, India, pp. 1 - 5, Nov. 2013.
  5. Ramani B, ActlinJeeva M P, Vijayalakshmi P, Nagarajan T, "Voice Conversion-based Multilingual to Polyglot Speech Synthesizer for Indian Languages", IEEE TENCON, Xi'an, China, pp. 1 - 4, Oct. 2013.
  6. B. Bharathi and T. Nagarajan "GMM and i-vector based speaker verification using speaker-specific-text for short utterances", IEEE TENCON, at Xi'an, China, 22-25, pp. 1 - 4, Oct. 2013.
  7. B. Ramani, S. Lilly Christina, G. Anushiya Rachel, 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, pp. 291 - 296, 2013.
  8. N. Sripriya, T. Nagarajan, "Pitch Estimation using Harmonic Product Spectrum derived from DCT", IEEE TENCON, China, pp. 1 - 4, Oct. 2013.
  9. M. Anbu Swarna Priyanka, V. Sherlin Solomi, P. Vijayalakshmi, T. Nagarajan, "Multiresolution Feature Extraction (MRFE) based speech recognition system", International Conference on Recent Trends in Information Technology (ICRTIT), Madras Institute of Technology campus of Anna University, Chennai, pp. 152-156, Jul. 2013.
  10. S. Magdalene Mahiba, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, "Analysis of Cross-Gender Adaptation using MAP and MLLR in Speech Recognition System", Third International Conference on Recent Trends in Information Technology (ICRTIT), Madras Institute of Technology campus of Anna University, Chennai, pp. 387-392, Jul.2013.
  11. B. Ramani, V. Sherlin Solomi, G. Anushiya Rachel, S. Lilly Christina, P. Vijayalakshmi, T. Nagarajan, Hema A Murthy, "Development and Evaluation of Unit Selection and HMM-based Speech Synthesis for Tamil", NCC, Delhi, India, pp. 1 - 5, Feb. 2013.
  12. B. Bharathi and T. Nagarajan, "A two-level approach for speaker recognition using speaker-specific-text", NCC, at IIT Delhi, pp. 1 - 5, Feb. 2013.