EMBEDDED ZEROTREE WAVELET CODING WITH JOINT HUFFMAN AND ARITHMETIC CODING

Abstract

Image compression is a task of reducing the image size without image quality degradation.It provides solution to both the problems of limited storage and long transmission time.This paper presents a method of combinational coding using Huffman and Arithmetic technique.The Embedded Zerotree Wavelet method which provides embedded bit stream is employed for image compression.The EZW symbols obtained are first coded using Huffman method.The Huffman bit stream is converted into byte stream and then into equivalent decimal.The final integer stream obtained is coded using Arithmetic coding.The proposed method of joint coding provides improved compression ratio as compared with Huffman coding alone.