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A novel approach to frequency domain design of three-dimensional digital filters via decomposition

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3 Author(s)
T. Kagoshima ; Fac. of Eng., Tohoku Univ., Sendai, Japan ; M. Kawamata ; T. Higuchi

The authors propose an efficient frequency domain design method for three-dimensional (3-D) digital filters. The proposed method decomposes a given 3-D magnitude specification into 1-D magnitude specifications with small error. To design 3-D digital filters applicable to real-time video signal processing, a novel approach is presented to approximation of negative magnitude specifications given by the decomposition with causal infinite impulse response (IIR) filters in a temporal direction and with linear phase non-causal IIR filters in spatial directions. Numerical examples show that the approximation error of the proposed design method is very small

Published in:

Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on

Date of Conference:

9-12 Aug 1992