Title:
FILTER SET FOR FREQUENCY ANALYSIS
Document Type and Number:
WIPO Patent Application WO2003069499
Kind Code:
A9
Abstract:
A system and method are disclosed for analyzing an input signal (100) into a plurality of frequency components. In one embodiment, the input signal (100) is processed with a first set of low pass filters (102-132) to derive a first set of frequency components wherein the first set of low pass filters (102-132) are arranged serially in a chain having a first low pass filter (102) and a last low pass filter (132), the output of each low pass filter being fed to the next low pass filter in the chain until the last low pass filter (132). The output of the last low pass filter (132) is downsampled (140) to produce a downsampled signal. The downsampled signal is processed with a second set of low pass filters (142-172) to derive a second set of frequency components.
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Inventors:
WATTS LLOYD
Application Number:
PCT/US2003/004124
Publication Date:
June 03, 2004
Filing Date:
February 11, 2003
Export Citation:
Assignee:
AUDIENCE INC (US)
International Classes:
H03H17/02; H03H17/04; (IPC1-7): G06F17/00; G10L19/00; H03G5/00
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