A Practical Approach for the Design of Nonuniform Lapped Transforms Academic Article uri icon

abstract

  • We propose a simple method for the design of lapped transforms with nonuniform frequency resolution and good time localization. The method is a generalization of an approach previously proposed by Princen, where the nonuniform filter bank is obtained by joining uniform cosine-modulated filter banks (CMFBs) using a transition filter. We use several transition filters to obtain a near perfect-reconstruction (PR) nonuniform lapped transform with significantly reduced overall distortion. The main advantage of the proposed method is in reducing the length of the transition filters, which leads to a reduction in processing delay that can be useful for applications such as real-time audio coding. © 2006 IEEE.

author list (cited authors)

  • Yoon, B., & Malvar, H. S.

citation count

  • 2

publication date

  • August 2006