Optimal variable fractional delay filters in time-domain L-infinity norm

Authors:
J. Selva
Affiliations:
Dpt. of Physics, Systems Engineering, and Signal Theory (DFISTS), University of Alicante, P.O. Box 99, 03080, Spain
Venue:
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Year:
2009

Citing 0
Cited 2

Design of barycentric interpolators for uniform and nonuniform sampling grids

IEEE Transactions on Signal Processing
Regularized sampling of multiband signals

IEEE Transactions on Signal Processing

Quantified Score

Hi-index	0.01

Visualization

Abstract

This paper presents an efficient implementation of the variable fractional-delay (VFD) filter, which is optimal in the time-domain L-infinity norm. The proposed filter has two stages. The first consist in computing the conventional Lagrange interpolator from the signal samples, but weighted using a set of fixed coefficients. And the second consists in multiplying the result of the previous step by a smooth function, which can be well approximated by a polynomial. The paper includes a numerical evaluation of this interpolator and a low-complexity, low-latency implementation based on multiplications.