Exact reconstruction analysis/synthesis filter banks with time-varying filters

Authors:
J. L. Arrowood, Jr.;M. J. T. Smith
Affiliations:
School of Electrical Engineering, Georgia Institute of Technology, Atlanta, GA;School of Electrical Engineering, Georgia Institute of Technology, Atlanta, GA
Venue:
ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: digital speech processing - Volume III
Year:
1993

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Abstract

This paper examines some of the analysis/synthesis issues associated with FIR time-varying filter banks where the filter bank coefficients are allowed to change in response to the input signal. Several issues are identified as being important in order to realize performance gains from time-varying filter banks in image coding applications. These issues relate to the behavior of the filters as transition from one set of filter banks to another occurs. Lattice structure formulations for the time varying filter bank problem are introduced and discussed in terms of their properties and transition characteristics.