SPIHT方法采用了有效的空间方向树结构和比特平面编码方法，不仅能获得很高的压缩编码效率，而且产生的码流是嵌入式的，支持解码器的多码率解码，有利于图像的渐近传输。-Methods SPIHT effective direction of the tree structure and the space bit-plane coding method, not only have access to a high coding efficiency and resulting code stream is embedded in support of the multi-rate decoder decoding, image has become conducive to near transmission.