M-channel lifting factorization of perfect reconstruction filter banks and reversible M-band wavelet transforms

作者: Ying-Jui Chen , K.S. Amaratunga

DOI: 10.1109/TCSII.2003.820233

关键词:

摘要: An intrinsic M-channel lifting factorization of perfect reconstruction filter banks (PRFBs) is presented as an extension Sweldens' conventional two-channel scheme. Given a polyphase matrix E(z) finite-impulse response (FIR) M- channel PRFB with det(E(z))=z/sup -K/, K/spl isin//spl Zopf/, systematic derived based on the Monic Euclidean algorithm. The structure provides efficient and implementation; examples include optimizing for number steps, delay elements, dyadic coefficients. Specialization to paraunitary building blocks enables design lifting. We show how achieve reversible, possibly multiplierless, implementations under finite precision, through unit diagonal scaling property Furthermore, filter-bank regularity desired order can be imposed structure, PRFBs prescribed admissible are conveniently parameterized.

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