When coding the wavelet-trees, zerotree is using neatly, which improves the compression efficiency. 在对小波树编码时，灵活运用了零树的概念，提高了压缩效率。
With the continuing developments of multimedia and wide-band network technology, much higher efficiency in multimedia dada compression and real-time applications are required. 目前，随着多媒体和宽带网络技术的发展，对多媒体数据压缩效率和应用的实时性要求越高。
