New class of 2-D digital filters composed of allpass subfilters

H. Toyoshima, M. Ikehara, S. Takahashi

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


We have proposed a new synthesis method for 2-D circularly symmetric digital filters by using allpass subfilters. The advantage of the proposed filter is to have approximately linear phase and small amplitude deviation in the passband. With our method, three filters are needed to realize the circularly symmetric characteristic, but two 2-D filter sections have the identical parameters and fewer independent parameters are required than conventional filters. The structure has very low sensitivity, because of the allpass property.

Original languageEnglish
Pages (from-to)420-424
Number of pages5
JournalIEE Conference Publication
Issue number308
Publication statusPublished - 1989
EventEuropean Conference on Circuit Theory and Design - Brighton, Engl
Duration: 1989 Sept 51989 Sept 8

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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