Sanjeev Kumar Dhull

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Digital image processing is a subset of the electronic domain wherein the image is converted to an array of small integers, called pixels, representing a physical quantity such as scene radiance, stored in a digital memory, and processed by computer or other digital hardware. The application of median filter has been investigated. As an advanced method(More)
In this paper we represent a new echo canceller using double talk detector that depends on variance impulse response. In this method detection is performed by calculating the variance of maximum value tap of recent tap in adaptive filter. Adaptive filter will stop updating its coefficients during double talk and it will resume updating after double talk.(More)
We have designed and simulated an adaptive line enhancer system for conferencing. This system is based upon a least-mean-square (LMS) and recursive adaptive algorithm (RLS) Performance of ALE is compared for LMS&RLS algorithms. Among the noise cancelling applications of the adaptive filters are the adaptive noise canceller and adaptive line enhancer. While(More)
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(More)
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(More)
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(More)
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