METHOD FOR DESIGNING QMF FILTERS, ANALYZING AND SYNTHESIZING CHANNEL USING THE FILTERS

摘要

PURPOSE: A method for designing a QMF(Quadrature Mirror Filter), a channel separating method, and a channel synthesizing method are provided to reduce errors by improving the filtering efficiency of pixel values in a boundary of an image. CONSTITUTION: A QMF bank system sets a low pass filter and a high pass filter(110). A system sets a half-band product filter to a z polynomial(120). The system converts the set half-band product filter to the product of the symmetric polynomial and the square of the low pass filter(130). The system calculates a second polynomial by the conversion of the set half-band product filter(140). The system determines a high pass filter(150).