Sanjeev Kumar Dhull

Comparison of Time-Delay Estimation Techniques in Acoustic Environment

The calculation of time delay between a signal and its echo received at a microphone has been proven to be a useful parameter. Speech enhancement, speaker localization, speech and speaker recognition are few applications of TDE methods. We are implementing various methods for the estimation of time delay. These methods are implemented in MATLAB. The reason for choosing the MATLAB as the analysis and simulation tool is that it has more flexible choices to support the simulation and is easy to do modification or data recording. These methods are crosscorrelation (CC), phase transform (PHAT). Various time-delay estimation techniques based on the cross-correlation functions are compared through simulations and measurements. Their simulation results are compared in terms of computation complexity, hardware implementation, precision, and accuracy.

Performance comparison of different sub band AEC

Echo Cancellation is important phenomenon in todays era. We can perform echo cancellation with sub band structures. We have designed different sub band structures for efficient echo cancellation. ERLE based Comparison is done between these models.

Adaptation Control Parameters of Multipath Model of an Adaptive Acoustic Echo Canceller

An overview of acoustic echo cancellation systems is presented. First the basics of echo’s, type of echo’s , why echo canceller are required and what are the difference between echo canceller are explained then the application where they can be used is discussed.. This paper presents applications of acoustic echo control and shows most recent solutions. For some selected applications (LEM) results achieved are presented.