利用lifting方法设计双正交滤波器组

Construction of biorthogonal filterbanks by lifting

研究了用lifting方法设计三通道自适应提升双正交滤波器组.在设计中,用子带编码增益作为设计准则,从任意一个滤波器组(标准正交或双正交)开始,通过联合自适应提升方法来设计三通道双正交滤波器组.最后,给出例子说明子带码增益明显提高.

Lifting scheme is generalized to construct three-channel adaptive biorthogonal filterbanks in this paper. Using the subband coding gain as the criterion in design, starting from an arbitrary filterbank （orthonormal or biorthogonal）, three-channel biorthogonal filterbanks are designed by the joint adaptive lifting scheme. Finally, experimental results show that the subband coding gains can be markedly improved.