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Generalized symmetric extension for size-limited multirate filter banks.

Author information

1
Dept. of Electr. Eng. and Comput. Sci., Washington State Univ., Pullman, WA.

Abstract

A multirate (MR) filter bank is called size-limited if the total number of output samples equals the number of input samples. A method called symmetric extension improved performance in subband image compression systems compared to the earlier method of circular convolution. However, the symmetric extension method was developed only for two-band uniform filter banks, and required even-length linear phase analysis filters. The authors generalize the symmetric extension method to the M-band, possibly nonuniform filter banks, where M=/>2. The length restriction on the analysis filters is relaxed.

PMID:
18291911
DOI:
10.1109/83.265983

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