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Explicit Formula for Lagrange Interpolation Coefficients

$\displaystyle h_\Delta(n) = \prod_{\stackrel{k=0}{k\neq n}} \frac{\Delta-k}{n-k},
\quad n=0,1,2,\ldots,N
$


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``Bandlimited Interpolation, Fractional Delay Filtering, and Optimal FIR Filter Design'', by Julius O. Smith III, (From Lecture Overheads, Music 420).
Copyright © 2014-03-24 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA),   Stanford University
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