提升小波源代码，可直接用于matlab编程，具有许多优良特性：结构简单、运算量低、原位运算、节省存储空间、逆变化可以直接反转实现，以及可逆的整数到整数变换。-The wavelet lifting scheme under matlab.It has many features:simple structure,little caculation scalar,computing at the original place,little storation,directily anti-conversion and the reversibility from integer to integer.