What is meant by Finite Impulse Response(FIR) in Digital filter.

Digital Filter
In signal processing, a digital filter is a system that performs mathematical operations on a sampled, discrete-time signal to reduce or enhance certain aspects of that signal. This is in contrast to the other major type of electronic filter, the analog filter, which is an electronic circuit operating on continuous-time analog signals Digital Filter are two type. 1) Finite Impulse Response 2) Infinite Impulse response

Impulse Response
In signal processing, the impulse response, or impulse response function (IRF), of a dynamic system is its output when presented with a brief input signal, called an impulse. More generally, an impulse response is the reaction of any dynamic system in response to some external change

Finite Impulse Response(FIR)
In signal processing, a finite impulse response (FIR) filter is a filter whose impulse response (or response to any finite length input) is of finite duration, because it settles to zero in finite time. The term finite impulse response arises because the filter output is computed as a weighted, finite term sum, of past, present, and perhaps future values of the filter input.

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