Proposes a modification to the classic time-frequency permutation method of signal scrambling which reduces its complexity and memory requirements without decreasing its performance. This new approach is applicable to any filter bank or transform and requires only that the decomposition in question be implemented in a polyphase form. To minimize the computational complexity, modulated polyphase filter banks like the cosine-modulated and allpass filter banks can be selected. Using a two dimensional extension to the basic algorithm, the authors consider the problem of image scrambling and include simulation results.<>


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    Titel :

    Efficient image scrambling using polyphase filter banks


    Beteiligte:
    Creusere, C.D. (Autor:in) / Mitra, S.K. (Autor:in)


    Erscheinungsdatum :

    01.01.1994


    Format / Umfang :

    440042 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Efficient Image Scrambling using Polyphase Filter Banks

    Creusere, C. D. / Mitra, S. K. / IEEE; Signal Processing Society | British Library Conference Proceedings | 1994





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