FIR Filter: Difference between revisions
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A FIR filter is a type of digital interpolating filter. We will be looking at its use to both distort and interpolate a digital signal as in a [[CD Player]]. Mathematically this this is done by |
A FIR filter is a type of digital interpolating filter. We will be looking at its use to both distort and interpolate a digital signal as in a [[CD Player]]. Mathematically this this is done by the following convolution: |
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Revision as of 11:59, 10 December 2004
A FIR filter is a type of digital interpolating filter. We will be looking at its use to both distort and interpolate a digital signal as in a CD Player. Mathematically this this is done by the following convolution:
.
So how do we do an infinite sum in a computer? Well we can't because we can't fit an infinite amount of data in a computer, so we have to trim it down.