Optimization in Acoustic Signal Processing using Adaptive Filters

The department of Electronics and Communication Engineering organized a live online Webinar on “Optimization in Acoustic Signal Processing using Adaptive Filters” by resource person Dr. Asutosh Kar, Senior Member IEEE, Faculty Fellow IIT Madras Pravartak, Marie-Curie Post Doc. AAU, Denmark, currently working as Assistant Professor, Department of ECE, IIITDM Kancheepuram, Chennai on 7th October 2021.

The program was graced by the presence of Dr. Rajiv Ranjan Singh (HOD, ECE Department), Dr. Shilpa Mehta (Professor, ECE Department), teaching staffs and students of 3rd, 5th and 7th semester of ECE department, SoE, Presidency University, Bangalore. The program began with a welcome speech given by Dr. M. S. Divya Rani. The webinar began with introducing students to what is acoustic signal and its characteristics, echo cancellation, active noise cancellation using feedback, feed forward and hybrid methods, why optimization is required, and how optimization techniques would help in acoustic signal processing for speech related applications. The talk focused on the best methods available for optimizing acoustic signals. The speaker explained acoustic echo cancellation taking the example of hands free telephony. A simple adaptive filter modeling module was also explained.

The speaker also explained the difficulties with conventional Echo canceller, Stereophonic acoustic echo canceller (SAEC), fast converging and low complexity approach to acoustic echo cancellation (AEC), its existing methods and proposed methods by the speaker published in various reputed journals. The factors to be considered while choosing suitable adaptive algorithms were discussed. Algorithms like Full update Multiple Sub filters (MSF) based AEC- Different error algorithm and Common error algorithm, Pseudo-fractional optimum tap length selection algorithm were discussed in detail with simulation results.

The speaker ended the session with a brief talk on future scope, parameters to be considered for improving the quality metrics and reducing the design complexity and number of iterations for reducing echo while designing optimization techniques for acoustic signal processing.

A vote-of-thanks was proposed by Ms. Aruna M at the end of the event. The event was organized meticulously by the Forum Team of ECE department which comprises of faculty members Ms. Divya Rani M S, Ms. Samreen Fiza, Ms. Aruna M and Ms. Anupama Sindgi.