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Effective Calculation of Dual Frame for the Short-Time Fourier Expansion

Shigeo WADA

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Summary :

This paper presents effective methods to calculate dual frame of the short-time Fourier expansion (STFE) in l2(Z). Based on a relationship between the prototype window used for generating a frame and the dual prototype window used for generating a dual frame in the STFE, two useful numerical methods with a finite frame operator are proposed to obtain finite support dual frames in time domain formulation. The methods can be used to construct the multiple STFE (MSTFE) suitable for a time-frequency analysis, synthesis and coding of discrete-time nonstationary signals. Numerical simulation results are given to verify the effectiveness of the calculation of dual frame.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E85-A No.5 pp.1111-1118
Publication Date
2002/05/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Digital Signal Processing

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