A Scalable Wavelet Image Coder Based on Zeroblock and Array

We propose a highly scalable image coder based on Zero-blocks and Array structures, called S-EZBA. It achieves not only distortion scalability, resolution scalability, and region of interest (ROI) retrievability, but also much of cost saving. We use a new formation of the final bitstream to realize these properties. Comparing with S-SPECK, S-EZBA omits memory needed on distributing the coding bits in the formation of bitstreams. S-EZBA has been implemented based on TSMC .18 um technology. Experimental results show excellent cost, power consumption and the scalable feature of the reconstructed image.