A.Said和W.A. pearlman根据Shapiro零树编码的基本思想,提出了一种新的且更优的实现方法--分层树集合分割(SPIHT),它是高效性能编码算法.这里给出了SPIHT程序及其改进后的程序.-A. Said and WA pearlman Shapiro zerotree coding based on the basic idea, a new and more excellent implementations- set partitioning in hierarchi