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A practical approach for the design of nonuniform lapped transforms

Yoon, Byung-Jun and Malvar, Henrique S. (2006) A practical approach for the design of nonuniform lapped transforms. IEEE Signal Processing Letters, 13 (8). pp. 469-472. ISSN 1070-9908. doi:10.1109/LSP.2006.873145.

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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.

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Additional Information:© Copyright 2006 IEEE. Reprinted with permission. Manuscript received December 10, 2005; revised January 23, 2006. [Posted online: 2006-07-17] The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Dimitri Van De Ville.
Subject Keywords:Cosine-modulated filter banks (CMFBs), extended lapped transforms (ELTs), filter banks, lapped transforms, modulated lapped transform (MLT), nonuniform filter banks
Issue or Number:8
Record Number:CaltechAUTHORS:YOOieeespl06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7029
Deposited By: Archive Administrator
Deposited On:05 Jan 2007
Last Modified:08 Nov 2021 20:38

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