Work place: National Institute of Technology Warangal, Warangal-506004, India
Research Interests: Signal Processing, Machine Learning, Speech Recognition
T. Kishore Kumar received the B.Tech degree in E.C.E from Sri Venkateswara University, Tirupati, India, in 1992, M. Tech degree in Digital Systems and Computer Electronics from J.N.T.U.Hyderabad, India in 1996, and Ph.D. degree in E.C.E from J.N.T.U.Hyderabad in 2004. He is currently Associate Professor and Head of the department of E.C.E,NIT Warangal, India. His research interests include Real Time Embedded Systems, Real Time signal processing and speech processing. He is currently working on two R&D projects sponsored by DST and DRDO worth about 28 lakhs. He is also developing Course Material for UG under Pedagogy in collaboration with IIT Kharagpur. He has awarded three Ph.D scholars in NITW, at present 4 students are pursuing PhD under him. He holds 22 publications in last five years. He is a member for Central Council Board (CCB), AIEEE. He has been invited as Chair person for International Conference on Signal Processing held at Czech Republic in 2008 and deputed for R & D Project on Real Time Embedded Systems in Signal Processing at University of Escigelec, Rouen, FRANCE in 2009. He is well travelled and has visited Tel Aviv, Singapore and Dubai to attend international conferences. He served the Tallinn University of Technology, Estonia as Visiting Professor during October and November 2013 under Heritage (INDO EUROPE Exchange Program).He has organized several MHRD Programs on Signal Processing at NIT WARANGAL for Faculty Development Program. He has delivered Guest Lectures at JNTUH and other institutes in AP. He is a member of IEEE and fellow of IETE.
DOI: https://doi.org/10.5815/ijisa.2016.02.06, Pub. Date: 8 Feb. 2016
Telephone systems commonly transmit narrowband (NB) speech with an audio bandwidth limited to the traditional telephone band of 300-3400 Hz. To improve the quality and intelligibility of speech degraded by narrow bandwidth, researchers have tried to standardize the telephonic networks by introducing wideband (50-7000 Hz) speech codecs. Wideband (WB) speech transmission requires the transmission network and terminal devices at both ends to be upgraded to the wideband that turns out to be time-consuming. In this situation, novel Bandwidth extension (BWE) techniques have been developed to overcome the limitations of NB speech. This paper discusses the basic principles, realization, and applications of BWE. Challenges and limitations of BWE are also addressed.[...] Read more.
DOI: https://doi.org/10.5815/ijisa.2014.12.10, Pub. Date: 8 Nov. 2014
Speech enhancement is a long standing problem with various applications like hearing aids, automatic recognition and coding of speech signals. Single channel speech enhancement technique is used for enhancement of the speech degraded by additive background noises. The background noise can have an adverse impact on our ability to converse without hindrance or smoothly in very noisy environments, such as busy streets, in a car or cockpit of an airplane. Such type of noises can affect quality and intelligibility of speech. This is a survey paper and its object is to provide an overview of speech enhancement algorithms so that enhance the noisy speech signal which is corrupted by additive noise. The algorithms are mainly based on statistical based approaches. Different estimators are compared. Challenges and Opportunities of speech enhancement are also discussed. This paper helps in choosing the best statistical based technique for speech enhancement.[...] Read more.
DOI: https://doi.org/10.5815/ijisa.2013.12.11, Pub. Date: 8 Nov. 2013
Target tracking is very important field of research as it has wider applications in defense as well as civilian applications. Kalman filter is generally used for such applications. When the process and measurements are non linear extensions of Kalman filters like Extended Kalman Filter, Unscented Kalman Filters are widely used. UKF can give estimations up to second order characteristics of random process. The target is maneuvering and switching among different models like constant velocity (CV), constant acceleration (CA) or constant turn (CT), Interactive Multiple Models (IMM) are employed. Implementation of IMM filters for any application is difficult because of initialization of Kalman filter i,e, tuning of filter has to be performed before applying to real time situations. It demands prior estimations of Noise covariance matrices which are left for engineering intuitions. This paper presents the nonlinear state estimation using IMM and tuning of the filter is done using bio-inspired algorithms like PSO GA and Hybrid GA-PSO.[...] Read more.
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