Filter bank constituting method and filter bank apparatus
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United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Dec 9, 1999
filing date -
Feb 23, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for constructing a filter bank designed to split the frequency spectrum of digital signals into plural bands. Specifically, a low-pass analysis filter unit (H.sub.0 (z)), adapted to pass frequency components of an input signal not higher than a pre-set frequency, is determined by a high-pass analysis filter unit (H.sub.1 (z)) passing frequency components of the input signal not less than the pre-set frequency and a phase-linear filter unit (f(z)) having phase-linear characteristics. This enables efficient wavelet splitting of the input signal.
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