Undecimated 웨이블릿변환 응용

Abstract

This paper introduces a new structure for the undecimated discrete wavelet transform(UDWT). This structure combines the stationaly wavelet transform with a lifting scheme and its design is based on a polyphase structure, where the downsampling and split stage are removed. The suggested structure inherits the simplicity of the lifting scheme, such that the inverse transform is easily implemented. The performance of the proposed undecimated lifting is verified on a signal denoising application.