Design and FPGA Implementation of Two-Dimensional Discrete Wavelet Transform Architectures Using Raster-Scan Method

Abstract

In this paper, an FPGA implementation of a 2-dimenional discrete wavelet transform (2-D DWT) is proposed to efficiently construct the corresponding two-dimensional architecture by using  the raster-scan image method for any given hardware architecture of one dimensional (1-D) wavelet transform filter. The proposed method is based on lifting scheme architecture. The resulting architectures are simple, modular and regular for computation of one or multilevel 2-D DWT. These architectures perform both low pass and high pass filter with multiplierless coefficients calculation. In addition they require a small on-chip area to download the architectures on FPGA Board (Spartan-3E). The proposed 2-D architecture consists of: external memory, Row 1-D arithmetic module, column 1-D arithmetic module and internal memory unit. The row and column 1-D arithmetic units are designed utilizing Biorthogonal filters (5/3 and 9/7). Keywords: 2-D DWT, FPGA implementation, Lifting scheme architecture, Raster-scan method .