DEVICE AND METHOD FOR EXTRACTING SIGNAL FEATURES

PROBLEM TO BE SOLVED: To provide a device and a method for extracting signal features capable of extracting highly accurate features from signals from a plurality of channels.SOLUTION: A signal feature extraction device includes: complex Fourier transformation means which extracts digital input sign...

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Bibliographic Details
Main Authors YUN ZHOU QI, KOBAYASHI TAKUMI
Format Patent
LanguageEnglish
Published 17.06.2013
Subjects
ACOUSTICS
CALCULATING
COMPUTING
COUNTING
DIAGNOSIS
ELECTRIC DIGITAL DATA PROCESSING
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
SURGERY
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Summary:PROBLEM TO BE SOLVED: To provide a device and a method for extracting signal features capable of extracting highly accurate features from signals from a plurality of channels.SOLUTION: A signal feature extraction device includes: complex Fourier transformation means which extracts digital input signals, which are sampled for just a preset period, from a plurality of channels using a different time window for each signal and transforms the extracted data into the frequency domain to acquire discrete data in time and frequency domains; intra-signal feature extraction means which extracts local correlation feature data from the signal from each channel; and inter-signal feature extraction means which extracts local correlation feature data among the signals from the plurality of channels. Extraction of feature information which includes correlations among signals from the plurality of channels improves recognition accuracy for signals in general as well as for signals having phase features.
Bibliography:Application Number: JP20110267612