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 Dec 1
    EventEuropean Conference on Circuit Theory and Design - Brighton, Engl
    Duration: 1989 Sep 51989 Sep 8

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering


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