Even-Order Lagrange Interpolation Summary
We may summarize some characteristics of even-order Lagrange fractional delay filtering as follows:
- Two-sample bounded-by-1 delay-range instead of only one-sample
- No gain zero at half the sampling rate for the middle delay
- No phase-delay discontinuity when crossing the middle delay
- Optimal (central) delay range is centered about an integer
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Lagrange Frequency Response Magnitude Bound