Hardware Implementation of a Wavelet Based Image Compression Coder

| A VLSI architecture designed to perform real-time image compression using wavelets is described. The two basic modules of the architecture are a 2-D wavelet transform generator and a coder based on the SPIHT algorithm for lossy image compression. A folded architecture is proposed for computing the 2-D wavelet transform. The architecture uses 3 parallel computational units and 2 storage units. The hardware for the SPIHT coder uses 2 content addressable memories and 3 random access memories. The designs are modular and can easily be extended for diierent levels of wavelet decomposition and lter lengths. The derived architecture has been functionally veriied for an 8 8 image size by simulating its VHDL code using Mentor Graphics.