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A parametric filter structure for first-order shelving and second-order peak filter transfer functions is derived. The approach is based on a decomposition of the transfer function into the minimum amount of direct branches and an all-pass section. It allows direct control of gain, bandwidth, and center/cutoff frequency for the boost case, and a coupled relation between gain and bandwidth for the cut case. Compared to other all-pass approaches, the new filter structure has fewer direct branches. Analytical formulas for the boost and cut case are derived.
Author (s): Zölzer, Udo; Boltze, Thomas
Affiliation:
Hamburg University of Technology, Hamburg, Germany
(See document for exact affiliation information.)
AES Convention: 99
Paper Number:4099
Publication Date:
1995-10-06
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Session subject:
Digital Signal Processing
Permalink: https://aes2.org/publications/elibrary-page/?id=7667
(367KB)
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Zölzer, Udo; Boltze, Thomas; 1995; Parametric Digital Filter Structures [PDF]; Hamburg University of Technology, Hamburg, Germany; Paper 4099; Available from: https://aes2.org/publications/elibrary-page/?id=7667
Zölzer, Udo; Boltze, Thomas; Parametric Digital Filter Structures [PDF]; Hamburg University of Technology, Hamburg, Germany; Paper 4099; 1995 Available: https://aes2.org/publications/elibrary-page/?id=7667