In the digital era that we live in, efficient coding of signals is an unquestionable need.This thesis is about one of the most useful and popular technique of digital coding: subband coding.

• 视讯索引技术在视讯随选系统与视讯图书馆系统中扮演相当重要的角色，但是庞大的视讯资料却是造成浏览困难与搜寻不易的最主要原因。