A New Lossy 3-D Wavelet Transform for High-Quality Compression of Medical Video

Abstract | In this paper, we present a new compression scheme based on applying the 3-D Fast Wavelet Transform, to code medical video. This video has special features such as its representation in gray scale, the small amount of interframe variations, and the quality re-quirements of the reconstructed images. These characteristics as well as the social impact of de-sired applications deserve the design and imple-mentation of coding schemes especially oriented to exploit its features. We analyze dierent parameters of the codication process, such as the utilization of dierent wavelets functions, the number of steps this function is applied, the way the thresholds are chosen, and the selected methods in the quantization and entropy encoder. Our coder achieves a good trade-o between com-pression ratio and quality of the reconstructed video. These results are better than MPEG-2, without the complexity of motion compensation