Patent ID: 6032081
Filing Date: 2000-02-29
Classification: G10L

Abstract:
A dematrixing processor for an MPEG-2 multichannel audio decoder, comprising:an arithmetic/control logic means for performing a dematrixing operation with respect to five compositely decoded signals to restore them to their original status, wherein the arithmetic/control logic means to perform an addition or subtraction operation on the basis of two parameters with a dematrix procedure and a transmission channel allocation having channel matrixing information, said arithmetic/control logic means determining the entire flow of the dematrix procedure; and,a low pass filtering means for low pass filtering an output signal from said arithmetic/control logic means and for providing a low pass filtered result to said arithmetic/control logic means, wherein the low pass filtering means includes a memory provided with four memory blocks for storing two previous input values and two previous output values of the filtering means therein to satisfy a transfer function of the filtering means.