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Singing voice analysis has been a topic of research to assist several applications in the domain of music information retrieval system. One such major area is singer identification (SID). There has been enormous increase in production of movies and songs in Bollywood industry over the last 50 decades. Surveying this extensive dataset of singers, the paper presents singer identification system for Indian playback singers. Four acoustic features namely-formants, harmonic spectral envelope, vibrato, and timbre-that uniquely describe the singer are extracted from the singing voice segments. Using the combination of these multiple acoustic features, we address the major challenges in SID like the variations in singer's voice, testing of multilingual songs, and the album effect. Systematic evaluation shows the SID is robust against the variations in singer's singing style and structure of songs and is effective in identifying the cover songs and singers. The results are investigated on in-house cappella database consisting of 26 singers and 550 songs. By performing dimension reduction of the feature vector and using Support Vector Machine classifier, we achieved an accuracy of 86% using fourfold cross validation process. In addition, performance comparison of the proposed work with other existing approaches reveals the superiority in terms of volume of dataset and song duration.

Advances in the multimedia technology provide an opportunity to enhance learning an Engineering subject like Digital Signal Processing (DSP). The paper presents a new teaching method that effectively integrates Information Technology into teaching -learning process. The entire DSP modules are implemented in an open source Course Management System (CMS), Moodle. It helps the students at undergraduate level in learning introductory DSP and experimenting with its basic concepts. At the same time, course instructors also find smooth flow of the contents covered that helps them in enhancing the effectiveness of their lectures, assign tasks to students with simple methods of evaluation and easy tracking of student's progress at every stage of learning.Moodle has been adopted by many people and organizations around the world, as it offers a tightly integrated set of tools to develop a powerful E-Learning tool. The focus here is upon effective adoption of the tool so that the teacher concentrates more on the learning activities and uses all the Moodle tools successfully. Moodle helps to present the course contents exactly the way the teacher has mapped the subject structure, but through a more controlled environment. The method is well suited for teaching the theoretical and mathematical concepts of DSP.

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