snapshot Hema A Murthy


Research Areas: Speech Processing, Speech Synthesis, Music information retrieval, Music Processing, Computational brain research, any area that involves machine learning and signal processing

Ph.D., Computer Science and Engineering, IIT Madras, 1992
M.Eng, Electrical and Computer Engineering, McMaster University,Canada, 1986
B.E., Electronics and Communcation Engineering, Osmania University, 1980
Associated Labs:
DONlab: Communications Systems and Indic Computing
Speech and Music Technology Lab
Courses (Teaching Currently/next Semester): Courses (that I have Taught Before): Research Scholars (current): Research Scholars (completed):
  • P V Krishnaraj Sekhar, ``Technology assisted archival and learning of varnams in Carnatic music,'' MS Thesis (submitted) 2018.
  • Arun Baby, ``A unified approach to speech synthesis in Indian languages,'' MS Thesis (submitted) 2018.
  • Golda Brunet Rajan, ``Transcription correction using signal processing and its application to continuous speech recognition,'' PhD Theis 2018.
  • Sridharan Sankaran, ``Segmentation of Music Items: A Computational Perspective,'' M S Thesis, IIT Madras, 2017.
  • Rajeev Rajan, ``Estimation of Pitch in Speech and Music Signals Using Modified Group Delay Functions,'' PhD Thesis, IIT Madras, 2017.
  • Saad Y Sait, ``Organizational level control of abusive traffic,'' (co-Guide: S Krishna Sivalingam), PhD Thesis, IIT Madras, 2017.
  • Anusha Prakash, ``Cross-lingual Speech Synthesis and Enhancement of Dysarthric Speech,'' (co-Guide, Prof. Ramasubba Reddy, Applied Mechanics), M S Thesis, 2017.
  • Shreya Khare, ``Multimedia Content Analysis And Its Application For Sound Source Localisation,'' M S Thesis, 2017.
  • Asha T, ``Relevance of front-end processing in Speaker Recognition,'' MS Thesis, IIT Madras, 2016.
  • Shrey Dutta, ``Analysis of Motifs in Carnatic Music: A Computational Perspective,'' M S Thesis, IIT Madras, 2016.
  • Akshay Bhandari, ``Feature extraction for anomaly detection,'' M S Thesis, IIT Madras, 2016.
  • Raghava Krishnan, ``PROSODIC ANALYSIS OF INDIAN LANGUAGES AND ITS APPLICA- TIONS TO SPEECH SYNTHESIS,'' M S Thesis, IIT Madras, 2016 (co-guide: Prof. S. Umesh, Dept. of EE, IIT Madras)
  • Padi Sarala, ``Applause identification and its application to archival of Carnatic Music,'' PhD Thesis, April 2015.
  • M R Srikanth, ``Speaker verification and keyword spotting for forensic applications,'' PhD Thesis, Dec 2013.
  • Ashwin Bellur, ``Automatic identification of tonic in Indian classical music,'' MS Thesis, January 2014.
  • Chaitanya Kumar, ``Information theoretic measures to incorporate multiple feature streams in the linguistic search space for automatic speech recognition,'' MS Thesis, 2013 (Co-guide: Prof. C Chandra Sekhar).
  • Subhadeep Dey, ``Universal syllable models for language identification,'' MS Thesis, IIT Madras, 2013.
  • Santosh Kumar Chaudhari, ``Green IT: Energy efficient techniques for network management for core networks and data centers,'' MS Thesis, IIT Madras, 2013.
  • Cyriac James, ``Relevance of time series in network traffic modeling: In the context of TCP SYN DOS attacks,'' M S Thesis, IIT Madras, 2012.
  • R Padmanabhan, ``Studies on voice activity detection and feature diversity for Speaker Recognition,'' Ph.D Thesis, IIT Madras, 2012.
  • Rajesh Janakiraman, ``Syllable Segmentation and its Application to Syllable-centric Continuous Speech Recognition,'' M.S Thesis, IIT Madras, 2012 (Co-guide: Prof. C Chandra Sekhar).
  • S Ranbir Singh ``On the significance of crawling, clustering and real-time implicit feedback in web search engines,'' (Co-guide: T A Gonsalves) Phd Thesis, 2010.
  • Nikhil Ranjan ``GARCH Models for TCP Based Denial of Service,'' (co-guide: T A Gonsalves) M S Thesis, 2010.
  • P R Ramya, ``Incorporating acoustic feature diversity in linguistic search space for speech recognition,'' (Co-guide C S Ramalingam) MS Thesis, 2009.
  • Sadhana Chevireddy, ``A syllable-based segment vocoder,'' (Co-guide: Dr. C Chandra Sekhar, Dept. of CS\&E), MS Thesis, 2009.
  • Y R Venugopalakrishna, ``Methods for improving the quality of syllable-based speech synthesis for Indian languages,'' (Co-guide: Prof. C S Ramalingam, Dept. of EE) MS Thesis, IIT Madras, 2009
  • P G Deivapalan, ``A Segmented Syllable-based, Isolated Word Recognizer for Indian Languages,'' M S Thesis, 2009.
  • Pranav Hamnabhadkar, ``Pattern Recognition and Synthesis of Materials Microstructures,'' (Co-guide: Dr. K Balasubramanian, Director, NFTDC, Hyderabad) MS Thesis, 2009.
  • Sreenivasulu Nagireddy, ``A Pattern Recognition Approach to Block Cipher Identification,''(Co-guide: Dr. C Chandra Sekhar, Dept. of CS\&E), MS Thesis, 2009.
  • M Kasirajan, ``Patram: A unified word processing system for handwritten character recognition in Indian languages,'' (Co-guide: Dr. Srinivasa Chakravarthy, Dept of BT), MS Thesis, IIT Madras, 2008.
  • P Sreehari Krishnan, ``Voice activity detection using group delay functions,'' M S Thesis, IIT, Madras, 2007.
  • A Lakshmi, ``A Syllable-based approach to continuous speech recognition inIndian languages,'' (Co-guide, Prof. C S Ramalingam, Dept. of EE) M S Thesis, IIT, Madras, 2007.
  • Samuel Thomas, ``Natural sounding Text-to-speech synthesis based on syllable-like units,'' (Co-guide: Prof. C Chandra Sekhar, Dept. of CS\&E) M S Thesis, IIT, Madras, 2007.
  • Dinil Mon Divakaran, ``Traffic Modeling and Analysis,'' (Co-guide: Prof. TA Gonsalves, Dept. of CS\&E) M S Thesis, IIT, Madras, 2007.
  • P Manohar, ``The Multimodal Interaction for the Computer: An Application independent Approach,'' M.S Thesis, IIT Madras, 2006.
  • Vinod J, ``Low cost Data Communication network for Rural Telecom Management,'' (Co-Guide: Prof. T.A. Gonsalves, Dept. CS\&E, IIT Madras) M S Thesis, IIT Madras, 2006.
  • G L Sarada, ``Automatic Transcription of Continuous Speech into Syllable-like Units,'' M.S Thesis, IIT Madras, 2006.
  • Rajesh Hegde, ``The Modified Group Delay feature and its application to Speech Recognition,'' Ph.d Thesis,IIT Madras, 2005.
  • R Deepak, ``Distributed Intrusion Detection System,''(Co-Guide: Prof. T.A.Gonsalves, Dept. CS&E, IIT Madras), M S Thesis, IIT Madras, 2005.
  • Veena Desai, ``Distributed Speech Recognition,'' (Co-guide: Prof.T A Gonsalves, Dept. of CS&E, IIT Madras), M.S Thesis, IIT Madras, 2005.
  • T. Nagarajan, ``Implicit Spoken Language Identification Systems,'' Ph.d Thesis, IIT Madras, 2004.
  • G.Sirisha, ``A DSP Virtual Machine,'' M S Thesis, IIT Madras, 2004(Co-Guide: Prof. T.A.Gonsalves, Dept. CS&E, IIT Madras)
  • N Sridhar Krishna, ``Multilingual Text-to Speech Synthesis,'' M S Thesis IIT Madras, 2004 (Co-Guide: Prof. T.A.Gonsalves, Dept. CS&E, IIT Madras)
  • M Balamurugan, ``An Access Network Planner,'' M S Thesis, IIT Madras, 2004 (Co-Guide: Prof. T.A.Gonsalves, Dept. CS&E, IIT Madras)
  • M. A. Saifulla, ``A Pattern Matching Approach to Classifying Network Traffic,'' M.S Thesis, IIT Madras, 2003, (Co-Guide: Prof. T.A.Gonsalves, Dept. of CS&E).
  • V Kamakshi Prasad, ``Segmentation and Recognition of Continuous Speech,'' Ph.D Thesis, IIT Madras, 2002.
  • A Ramasamy, ``LP Based Traffic Modelling and a Framework for Control,'' M.S.Thesis, IIT Madras, 2002 (Co-Guide: Prof.T.A.Gonsalves, Dept. of CS&E).
  • B Jyotsana, ``A Spoken Language Identification System for Indian Languages,'' M.S. Thesis, IIT Madras, 2001.
  • S Vela, ``A New Model of Speaker Identification based on Statistical Similarity and an Object Oriented Framework for Online Speaker Identification,'' M.S.Thesis, IIT Madras, 1999.
  • J Srichand, ``Word Boundary Detection in Indian Languages and its Application to Keyword Spotting,'' M.S.Thesis, IIT Madras, 1999 (Co-guide:Dr.G.V.Ramana Rao).
  • M Narendranath, ``Transformation of Vocal Tract Characteristics for Voice Conversion using Artificial Neural Networks,'' M.S. Thesis, IIT Madras, 1995 (Co-Guide: Prof.B.Yegnanarayana, Dept. of CS&E).
  • Contact Information:
    BSB 307
    Department of Computer Science and Engineering
    Indian Institute of Technology Madras
    Chennai - 600 036
    Ph: +91-44-2257 4364
    Fax: +91-44-2257 4352
    E-mail: hema AT cse DOT iitm DOT ac DOT in

  • Research Interests: Speech processing, recognition synthesis, computer networks, music processing.
  • Social Interests: School education , Science popularisation , Communal harmony, global warming, women empowerment
  • Membership: IEEE Society, Indian scientists against nuclear weapons, Movement for Peace and Unity, Tamilnadu science forum, Prakriti (a group at IITM that is concerned about the environment).
  • Publications (Recent):
  • Golda Brunet Rajan and Hema A Murthy, “Transcription Correction Using Group Delay Process- ing for Continuous Speech Recognition,” Circuits Systems Signal Processing, DOI:10.1007/s00034- 017-0598-2,issn: Print: 0278-081X, Online: 1531-5878 July 2017.
  • Rajeev Rajan and Hema A Murthy, ``Two-pitch tracking in co-channel speech using modified group delay functions,'' Speech Communication, 2017.
  • Rajeev Rajan, Manaswi Mishra and Hema A Murthy, ``Melody extraction from music signals using modified group delay functions,''International Journal of Speech Technology, Vol 20, pp.185-204, Jan 2017.
  • Jilt Sebastian and Hema A Murthy, ``ONSET DETECTION IN COMPOSITION ITEMS OF CARNATIC MUSIC,'' accepted ISMIR 2017, Sozhou, China.
  • Venkatasubramanian Viraraghavan, R Aravind and Hema A Murthy, ``A Statistical Analysis of Gamakas in Carnatic Music,'' accepted ISMIR 2017, Sozhou China.
  • Sakshi Verma, K L Prateek, Karthik Pandia, Nauman Daulatabad, Jitendra Sharma, Rogier Lan- der, Mriganka Sur, “Discovering Language in Marmoset Vocalization,” accepted INTERSPEECH 2017, Stockholm, Sweden.
  • Arun Baby, Jeena J Prakash, Rupak Viswanathan, and Hema A Murthy, “Deep Learning Tech- niques in Tandem with Signal Processing Cues for Phonetic Segmentation for Text to Speech Synthesis in Indian Languages,” INTERSPEECH 2017, Stockholm, Sweden.
  • Jilt Sebastian, Mari Ganesh Kumar, Y S Sreekar, Rajeev Vijay Rikye, Mriganka Sur and Hema A Murthy, “GDSPIKE: An accurate spike estimation algorithm from noisy Calcium fluorescence signals,” ICASSP 2017, New Orleans, USA.
  • Rajeev Rajan and Hema A Murthy, ``Music Genre Classification by Fusion of Modified Group Delay and Melodic Features,'' pp.1-5, NCC 2017, Chennai, India.
  • Padmasundari and Hema A Murthy, `` Raga Identification usign locality sensitive hashing,'' pp.1-5, NCC 2017, Chennai, India.
  • P V Krishna Raj, Venkatasubramanian Viraraghavan, Sridharan Sankaran and Hema A Murthy, ``An Approach to Transcription of Varnams in Carnatic Music Using Hidden Markov Models,'' pp.1-5, NCC 2017, Chennai, India.
  • Swetha Tanamala, Jeena J Prakash and Hema A Murthy, ``A semi-automatic method for transcription correction for Indian language TTS systems,'' pp.1-5, NCC 2017, Chennai, India.
  • Awards:
  • Fellow of INAE, 2017.
  • ISCA board member 2017-2021.
  • Indian Language text-to-speech synthesis systems integrated with screen readers, GE innovation award and first prize in research expo, Shaastraa 2013.
  • Prof. Rais Ahmed Memorial Lecture Award, Acoustical Society of India, 2012.
  • Text to speech synthesis in Indian Languages, Manthan Award Finalist (top 74 out ~450 projects), 2012.
  • IBM Faculty award, 2006.
  • Projects:
  • Text to speech synthesis: Resources available
  • Text to speech synthesis: Online HTS systems
  • Text to speech synthesis: Online USS systems
  • Discovery of Carnatic Music -- CompMusic Project.
  • CompMusic -- IIT Madras Demos
  • Speaker Verification
  • Computational Neuroscience
  • Other Activities:

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    Detailed Curriculum Vitae