Abstract
Digital filters where unit delays are replaced with frequency-dependent delays, such as first order allpass sections, are often called warped filters since they implement filter specifications on a warped non-uniform frequency scale. Warped IIR (WIIR) filters cannot be realized directly due to delay-free loops. Specific solutions have been known that make WIIR filters realizable but no general approach has been available so far. In this paper we will explore the generation of such filters, including new filter structures. The robustness and computational efficiency of WIIR filters are studied and most potential applications are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 2205-2208 |
| Number of pages | 4 |
| Journal | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
| Volume | 3 |
| Publication status | Published - 1997 |
| Externally published | Yes |
| Event | 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing - Munich, Germany Duration: 21 Apr 1997 → 24 Apr 1997 |