snapshot Hema A Murthy


Research Areas: Speech Processing, Speech Synthesis and Recognition, Network traffic analysis and modeling, Music information retrieval, Music Processing, Time series modeling, and Pattern Recognition

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
Courses (Teaching Currently/next Semester): Courses (that I have taught before): Research Scholars (current): Research Scholars (completed):
  • Akshay Bhandari, "Feature extraction for anomaly detection," M S Thesis, submitted, July 2015.
  • Raghava Krishnan, "PROSODIC ANALYSIS OF INDIAN LANGUAGES AND ITS APPLICATIONS TO SPEECH SYNTHESIS," submitted July 2015 (co-guide: Prof. S. Umesh, Dept. of EE, IIT Madras)
  • P Sarala, "Applause identification and its application to archival of Carnatic Music," PhD Thesis, April 2015 (post-doc at NIST, Maryland).
  • M R Srikanth, "Speaker verification and keyword spotting for forensic applications," PhD Thesis,December 2013 (currently post-doc IDIAP, Switzerland)
  • Ashwin Bellur, "Automatic identification of tonic in Indian classical music," MS Thesis, January 2014 (currently pursuing PhD -- Johns Hopkins Univ, USA).
  • 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 (currently pursuing PhD -- IDIAP, Switzerland).
  • 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 (currently pursuing PhD -- University of Calgary, Canada).
  • R Padmanabhan, "Studies on voice activity detection and feature diversity for Speaker Recognition," Ph.D Thesis, IIT Madras, 2012 (post-doc Univ of Eastern Finland, currently faculty at IIT Mandi).
  • 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 (currently faculty at IIT Gauhati)
  • 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 (completed PhD -- EPFL, currently post-doc, IDIAP).
  • 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 (currenlty pursuing PhD at IISc, Bangalore)
  • 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 (PhD --EPFL, post-doc ICSI, Berkeley, Amazon, USA)
  • 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 (PhD -- EPFL, postdoc IDIAP, Switzerland)
  • 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 (PhD -- Johns Hopkins Univ,currently Member of Technical Staff, IBM T J Watson, New Jersey).
  • Dinil Mon Divakaran, "Traffic Modeling and Analysis," (Co-guide: Prof. TA Gonsalves, Dept. of CS&E) M S Thesis, IIT, Madras, 2007 (PhD -- INRIA, France, currently Researcher, I2R, Singapore).
  • 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 (post-doc Calit, UCSD, currently faculty EE Dept, IIT Kanpur).
  • 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 (post-doc BNRS, Canada, currently HoD, Dept of IT, SSN College of Engg, Chennai).
  • 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) (PhD -JHU, Audience, CA)
  • 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 (currently faculty at Dept. of CS&E, JNTU, Hyderabad).
  • 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) (PhD OGI).
  • 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, music processing, video 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):
  • Shrey Dutta, Krishnaraj Sekhar P V and Hema A Murthy, "Raga Verification in Carnatic Music Using Longest Common Segment Set," ISMIR 2015 , Malaga, Spain.
  • Swapnil Gupta, Ajay Srinivasamurthy, Manoj Kumar, Hema A Murthy and Xavier Serra," Discovery of Syllabic Percussion Patterns in Tabla Solo Recordings," ISMIR 2015 , Malaga, Spain.
  • Sridharan Sankaran, Krishnaraj Sekhar P V and Hema A Murthy, "Automatic Segmentation of Composition in Carnatic Music Using Time-Frequency CFCC Templates", CMMR 2015 , Plymouth, UK.
  • Jom Kuriacose, Padi Sarala, Hema A Murthy and Umayalpuram K Sivaraman, "Akshara transcription of mrudungam strokes in carnatic music," NCC 2015 , Mumbai, India.
  • Jilt Sebastian, P A Manoj Kumar and Hema A Murthy, "Pitch Estimation From Speech Using Grating Compression Transform on Modified Group-Delay-gram," NCC 2015 , Mumbai, India.
  • P A Manoj Kumar, Jilt Sebastian and Hema A Murthy, "Musical Onset Detection on Carnatic Percussion Instruments", NCC 2015 , Mumbai, India.
  • Akshay Bhandari and Shreya Khare and Hema A Murthy "Systematic Downloading: Analysis and Detection," presented at ICSPCS'2014, Brisbane, Australia.
  • S Aswin Shanmugam and Hema A Murthy, "A Hybrid Approach to Segmentation of Speech Using Group Delay Processing and HMM Based Embedded Reestimation,'' INTERSPEECH 2014.
  • Asha T, Saranya M S, Karthik Pandia, Srikanth Madikeri and Hema A Murthy, ``Feature switching in the i-Vector framework for speaker verification,'' INTERSPEECH 2014.
  • Asha T and Hema A Murthy, ``The relevance of NIST Speaker recognition evaluations,'' { SPCOM-2014}, Bangalore, India.
  • Ranbir Sanasam Singh, Hema Murthy and Timothy Gonsalves, ``Inference Based Query Expansion Using Real Time Implicit Feedback,'' in Communications in Computer and Information Science Series, Springer-Verlag (Accepted for publication).
  • Srikanth Madikeri, Asha Talambedu and Hema A Murthy, "Modified Group Delay Feature based Total Variability Space modelling for Speaker Recognition," accepted for publication, International Journal of Speech Technology, Springer-Verlag.
  • Sankalp Gulati, Ashwin Bellur, Justin Salamon, Vignesh Ishwar, Hema A Murthy and Xavier Serra, ``Automatic tonic identifcation in Indian art music: Approaches and evaluation,'' Journal of New Music Research, Publisher: Taylor and Francis, Vol 43, No.1, pp.53-71. 2014.
  • Preeti Rao, Joe Cheri Ross, Kaustuv Kanti Ganguli, Vedhas Pandit, Vignesh Ishwar, Ashwin Bellur and Hema Murthy, ``Melodic Motivic Analysis of Indian Music,'' Journal of New Music Research, Publisher: Taylor and Francis, Vol 43, No.1, pp. 115-131, 2014.
  • Akshay Ananthapadmanabhan, Juan Bello, Raghava Krishnan and Hema A Murthy, ``Tonic independent stroke transcription of the mridangam,'' Audio Engineering Society Conference: 53rd International Conference: Semantic Audio, January, 2014.
  • Shreya Khare and Akshay Bhandari and Hema A Murthy, "URL Classification Using Non Negative Matrix Factorization,'' Proc. NCC 2014 .
  • Anusha Prakash and Machireddy Reddy and Nagarajan T and Hema A Murthy, ``An Approach to Building Language-Independent Text-to-Speech Synthesis for Indian Languages,'' Proc. NCC 2014.
  • Anjana Babu and Raghava Krishnan K and Anil Kumar Sao and Hema A Murthy, ``A Probabilistic Approach to Selecting Units for Speech Synthesis Based on Acoustic Similarity,'' Proc. NCC 2014.
  • S Aswin Shanmugam and Hema A Murthy, ``Group Delay Based Phone Segmentation for {HTS},'' Proc. NCC 2014
  • Musfir Mohammed, N N, Raghava Krishnan K and Hema A Murthy, ``Analysis of Fricatives, Stop Consonants and Nasals in the Automatic Segmentation of Speech Using the Group Delay Algorithm,'' Proc. NCC 2014.
  • Shrey Dutta and Hema A Murthy, "A Modified Rough Longest Common Subsequence Algorithm for Motif Spotting in an Alapana of Carnatic Music,'' Proc. NCC 2014.
  • Patil, H.A. and Patel, T.B. and Shah, N.J. and Sailor, H.B. and Krishnan, R. and Kasthuri, G.R. and Nagarajan, T. and Christina, L. and Kumar, N. and Raghavendra, V. and Kishore, S.P. and Prasanna, S.R.M. and Adiga, N. and Singh, S.R. and Anand, K. and Kumar, P. and Singh, B.C. and Binil Kumar, S.L. and Bhadran, T.G. and Sajini, T. and Saha, A. and Basu, T. and Rao, K.S. and Narendra, N.P. and Sao, A.K. and Kumar, R. and Talukdar, P. and Acharyaa, P. and Chandra, S. and Lata, S. and Murthy, H.A., ``A syllable-based framework for unit selection synthesis in 13 Indian languages," Proc. O-COCOSDA 2013,pp.1-8, {doi.10.1109/ICSDA.2013.6709851}
  • Padi Sarala and Hema A Murthy, ``Cent filter banks and its relevance to identifying the main song in Carnatic music,'' accepted LNCS Sound, Music and Motion, pp 659-681, 2014.
  • Vignesh Ishwar, Shrey Dutta, Ashwin Bellur and Hema A Murthy, ``Motif spotting in an Alapana in Carnatic music,'' pp.499--504, Proc. ISMIR 2013.
  • Padi Sarala and Hema A Murthy, ``Inter and intra segmentation of Carnatic music recordings for archival,'' pp.487--492 Proc. ISMIR 2013.
  • Awards:
  • 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).
  • IBM Faculty award, 2006.
  • Projects:
  • Text to speech synthesis systems in Indian languages -- Consortium leader
  • Discovery of Carnatic Music -- CompMusic Project (
  • Speaker Verification
  • Indo UK Advanced Technology Collaboration -- Network Resilience
  • Other Activities:

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    Detailed Curriculum Vitae