A scalable architecture for discrete wavelet transform

We present the design and prototyping of an efficient systolic architecture which performs both forward and inverse discrete wavelet transform. The proposed architecture consists of a linear array of processing elements, each of which has an adder and a multiplier and fixed number of I/O channels. The wavelet transform is computed by convolution and by mapping the computation on to a linear array of systolic processing elements. The design of the architecture has been shown to be simple, scalable and has the advantage of low I/O bandwidth. The number of processing elements is independent of the size of the input. The architecture has been prototyped using 2/spl mu/m p-well CMOS technology and has been developed in the CADENCE Edge Design Framework environment.