Asutosh Kar

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Acoustic echo is one of the most important issues in communication. It creates disturbance in day-to-day communication. This echo can be cancelled using adaptive filters which are governed by adaptive algorithms. Right from the introduction of Least Mean Square (LMS) algorithm, over the years, a lot of research has been done in this field in order to(More)
Most current adaptive filters fix the filter order at some compromise value resulting in too short and too long filters with issues like undermodelling and adaptation noise in time varying scenarios. The tap length learning algorithm dynamically adapt the filter order to the optimum value makes the variable order adaptive filter more efficient including(More)
Voice communication today has become an indispensable part of human lives. Long distance communication is as crucial as face to face conversation. Hence, the issue of speech quality needs to be addressed with utmost priority. In this paper, the importance of voice communication over long distance is discussed. Then the analysis proceeds with the thorough(More)
Noise is liable for generating troubles in day-to-day communication, so noise reduction is a major issue. To acquire a signal free from distortion, the key objective is to terminate the noise existent in the original signal. This noise can be cancelled using adaptive filters which are governed by adaptive algorithms. Various algorithms are proposed over the(More)
Adaptive filters are different from conventional filter in the sense that the adaptive filters are dynamic in nature. These filters are run by algorithms known as adaptive algorithms. Numerous adaptive algorithms have been developed since the development of DSP chips in the 1980s. These adaptive algorithms were used to tackle various issues like system(More)
Removal of noise is an important criterion of image processing to improve the quality of an image. There are many unwanted elements present in image which are commonly known as noise that should be removed from an image for any further processing. Mean and Median filter are normally used to reduce noise present in an image and for preserving useful detail(More)
Acoustic echo arises when an audio signal is radiated in the real environment, resulting in the signal plus its attenuated, time delayed images. With time delay as the constraint, the prominence of the echo over communication channels is determined. Modern times have seen extensive research over the removal nonlinear echoes caused by portable communication(More)