Biorthogonal frequency-varying modulated lapped transform

Authors:
Yixin Gao;Guizhong Liu
Affiliations:
School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, P. R. China;School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
Venue:
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Year:
2009

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Abstract

In this paper we introduce a biorthogonal frequency-varying modulated lapped transform (BFV-MLT) with flexible tiling behavior of time-frequency plane and attenuation of ringing artifacts. Biorthogonality allows accessorial freedom in designing the analysis and synthesis filter-banks and FVMLT provides nonuniform decomposition of signals with ideal time or frequency resolutions. By constructing a new approach to FV-MLT, we incorporate biorthogonality into FV-MLT easily and achieve flexible representations of signals plus freedom in filter-bank design. We also prove that perfect reconstruction holds in BFV-MLT which confirms its application in compression schemes.