Cosine-modulated 2-dimensional perfect reconstruction FIR filter banks with linear phase

Authors:
T. Nagai;M. Ikehara
Affiliations:
Fac. of Sci. & Technol., Keio Univ., Yokohama, Japan;-
Venue:
ICASSP '96 Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 03
Year:
1996

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Abstract

In this paper, we propose a design method of cosine-modulated 2-dimensional (2-D) perfect reconstruction (PR) FIR filter banks, in which each analysis and synthesis filter has linear phase (LP). As in previous works, it is impossible to design the 2-D cosine modulated system which satisfies both the PR condition and LP property. However, in 2-D signal processing, it is very important for each filter to have the LP property. Our main goals are to show such a system can be realized by considering a new decomposition scheme and derive the conditions for PR and LP. A design example is included to show the effectiveness of this paper.