Authors
Abstract
There are two methods of H/W (hardware) implement of the 2D (two dimension) QMF (quadrate mirror filter), first method is a very low cost and a low speed, that use one pair of FIR (finite impulse response) filters LPF (low pass filter) and HPF (high pass filter). This method uses the pair of FIR filters to decompose the image to L and H bands in the first step that will called row decomposition, this method is a low speed but it required low cost.
Second method is a high speed and high cost that use three pairs of FIR filters LPF and HPF, this method is a high speed but it required to a high cost. The proposed method in this paper is using the time sharing in column
decomposition part to reduce the cost of the second method of the 2D QMF. The dissipation time of column decomposition equal to half time of the row decomposition, therefore some one can use one pair of FIR filters to column decomposition that is meaning that this method use two pairs of filters. The required time to this method equal to the same time of the second method, and about to two third of the cost of the second method, therefore this method is a high speed but it required to a low cost
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