DEPARTMENT OF Computer Science and Engineering

Educational Qualification:

• BE – MREC, Jaipur (1996)
• MTech – CUSAT (2001)
• PhD – CUSAT (2010)

Specializations:

• Signal Processing

Current Research Interest:

• Signal transforms
• Speech processing
• Applications of Generative AI

Professional Body Membership:

• ISTE
• IEEE Senior Member

Publications:

• A. R. Ambili and Rajesh Cherian Roy, “Local and Global Context Feature Fusion for Effective Spoken Language Identification in Indian Linguistics” at International Conference on Smart ElectroNics and Communication SystEms 2024 (ISENSE 2024), December 2024, Indian Institute of Information Technology Kottayam, Kerala
• A. R. Ambili and Rajesh Cherian Roy, “The Effect of Synthetic Voice Data Augmentation on Spoken Language Identification on Indian Languages,” in IEEE Access, vol. 11, pp. 102391-102407, 2023, doi: 10.1109/ACCESS.2023.3316142.
• Divya M Vijayan, AV Arun, R Ganeshnath, Ajay Nath SA, and Rajesh Cherian Roy, “Development and Analysis of Convolutional Neural Network based Accurate Speech Emotion Recognition Models,” 2022 IEEE 19th India Council International Conference (INDICON), Kochi, India, 2022, pp. 1-6, doi: 10.1109/INDICON56171.2022.10040174.
• A. R. Ambili and Rajesh Cherian Roy, “Spoken Language Identification of Indian Languages in Adversarial Synthetic and Noisy Attacking Environments,” 2022 International Conference on Computing, Communication, Security and Intelligent Systems (IC3SIS), Kochi, India, 2022, pp. 1-6, doi: 10.1109/IC3SIS54991.2022.9885560.
• A. R. Ambili and Rajesh Cherian Roy, “Multi Tasking Synthetic Speech Detection on Indian Languages,” 2022 International Conference on Innovative Trends in Information Technology (ICITIIT), Kottayam, India, 2022, pp. 1-6, doi: 10.1109/ICITIIT54346.2022.9744221
• Rajesh Cherian Roy, “A New Integer-to-Integer Transform” in Cheon Seoung Ryoo  (Ed.), Number Theory and Its Applications, IntechOpen, 2020, ISBN 978-1-83968-051-9

https://doi.org/10.5772/intechopen.78090

• Rajesh Cherian Roy, “Relationship between the Cosine Integer Transform and the Mapped Real Transform,” ICACCI 2018, Bangalore.https://ieeexplore.ieee.org/abstract/document/8554411
• Rajesh Cherian Roy, “Relationship between the Haar transform and the cosine integer transform,” Proceedings of NCCCSP 2016, GEC Wayanad.
• Rajesh Cherian Roy, “The Relationship between the WHT and the CIT,” Proceedings of VisionNet ‘15, Procedia Computer Science 58 (2015) pp. 321-332, www.sciencedirect.com.
• Rajesh Cherian Roy, “Cos-sin trans/form: A transform based on cosine-sine symmetries”, Proceedings of ICSSP 2014, TKMCE, Kollam.
• Rajesh Cherian Roy and R. Gopikakumari, “A transform (MRT) naturally suited to directional pattern analysis”, Proceedings of ICCES 2013, NIT Jaipur, 2013.http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1567216
• Rajesh Cherian Roy and R. Gopikakumari, “A new Integer-to-integer transform for 2-D Signals,” Proceedings of ICSIVP 2012, IIT Patna, 2012.
• Rajesh Cherian Roy and R. Gopikakumari, “Relationship between the Haar transform and the MRT,” Proceedings of ICICS 2011, NTU Singapore, 2011.http://ieeexplore.ieee.org/iel5/6165552/6173124/06173127.pdf
• Rajesh Cherian Roy and R. Gopikakumari, “A new transform for signal representation utilizing DCT symmetries, Proceedings of ICSSP 2010, NIT Calicut, Feb 2011.http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5739386
• Rajesh Cherian Roy and R. Gopikakumari, “ Isometric transformations in MRT domain,” Proceedings of ICCC2010, CET Thiruvanthapuram, 2010.
• Meenakshy K., Rajesh Cherian Roy, Bhadran V. and R. Gopikakumari, “Feasibility of texture analysis using 2-D MRT,” Proceedings of PICC 2010, GEC Thrissur, 2010.
• Rajesh Cherian Roy and R. Gopikakumari, “The relationship between the Hadamard transform and the MRT,” Proceedings of PICC 2010, GEC Thrissur, 2010.
• Rajesh Cherian Roy and R. Gopikakumari, “On the relationship between the DFT and the MRT,” Proceedings of International Conference on Power, Signals, Control and Computations, 2010.
• V. Bhadran, Rajesh Cherian Roy and R. Gopikakumari, “Algorithm to identify basic coefficients of 2-D DFT for any even N,” Proc. ICVCOM, Saintgits College of Engineering, Kottayam, Apr 16-18, 2009.
• Rajesh Cherian Roy and R. Gopikakumari, “1-D MRT: A new transform for 1-D signals, Proceedings of IETE National Seminar, Kochi, May 2009.
• Bhadran V., Rajesh Cherian Roy and R. Gopikakumari, “Visual Representation of 2-D DFT in terms of 2 x 2 data: A Pattern Analysis,” Proceedings of the International Conference on Computing, Communication and Networking, (ICCCN ’08), 2008.
• M. S. Anish Kumar, Rajesh Cherian Roy and R. Gopikakumari, “A New Transform Coder for Gray Scale Images Using 4×4 MRT”, AEU – International Journal of Electronics and Communications (Elsevier), vol. 62, no. 8, pp. 627-630, September 2008.
• Rajesh Cherian Roy, M. S. Anish Kumar and R. Gopikakumari, “An invertible transform for image representation and its application to image compression,”Proceedings of the 9th International Symposium on Signal Processing and Its Applications, (ISSPA 2007), pp. 1-4, 2007.http://www.ieeexplore.ieee.org/iel5/4542559/4555273/04555504.pdf
• M. S. Anish Kumar, Rajesh Cherian Roy and R. Gopikakumari, “A New ImageCompression and Decompression technique based on 8×8 MRT,” ICGST International Journal on Graphics, Vision and Image Processing, vol. 6, no. 1, pp. 51-53, 2006.
• Rajesh Cherian Roy, M. S. Anish Kumar and R. Gopikakumari, “MRT: An alternate frequency domain representation,” Proceedings of IETE Zonal Conference, Kochi, March 2006.
• Rajesh Cherian Roy and R. Gopikakumari, “A new transform for 2-d signal representation (MRT) and some of its properties,” Proceedings of the International Conference on Signal Processing and Communications, (SPCOM ’04), pp. 363 – 367, 2004 http://ieeexplore.ieee.org/iel5/9869/31229/01458423.pdf
• R. Gopikakumari, C. K. Jayadas, Rajesh Cherian Roy, R. S. Roshni and C. S. Sridhar, “Semantic Rule Based Visual Representation of 2-D DFT for N=6,” Proceedings of the International Conference on Imaging Science, Systems and Technology, (CISST ’03), pp.220-224, 2003.

Recent Certifications:

• Google Cybersecurity Professional Certificate, 2024
• Google Data Analyst Learning Path, 2024
• Generative AI with Large Language Models, DeepLearning.AI, 2024