A study of quantization range in wavelet transform coding by zero value tree structure and vector quantization

An encoding method for the purpose of improving the performance of color image compression by wavelet transform is proposed. As the main contents, high frequency elements are composed of a zero value tree structure and 5-dimensional vector quantization uses the LBG algorithm. After the range of quantization is discussed in the experiment, it is clear that the range of zero value quantization is almost the same as the vector quantization. Furthermore, the result applied to the color picture is described. The simulation results show the effectiveness of using the proposed method that unifies these techniques.