Information extracting device

Details Information extracting device Information extracting device

2008-04-29

2008-04-29

{hacek over (S)}mits, Tälivaldis Ivars (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S258000, C704S219000

Reexamination Certificate

active

07366661

ABSTRACT:
The present invention relates to an information extraction apparatus capable of analyzing an acoustic signal with accuracy and high efficiency.An amplitude analysis section32determines whether or not an attack or release is contained on the basis of an amplitude value for each small region of an input time-series signal. When it is determined that there is an attack or release, an analysis region setting section33sets the portion from an attack position to a release position as an analysis region. A frequency analysis section34analyzes the input time-series signal by generalized harmonic analysis and outputs extracted waveform information. An extracted waveform synthesis section35synthesizes the extracted waveform information and outputs the information to a time-series compensation section36.The time-series compensation section36compensates the signal of the synthesized result with a signal outside the analysis region and outputs an extracted waveform time-series signal to a subtraction unit37.The subtraction unit37generates a residual time-series signal from the input time-series signal and the extracted waveform time-series signal. The present invention can be applied to various audio apparatuses, voice recognition apparatuses, voice synthesis apparatuses, etc., for processing an acoustic signal.

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Communication for European Patent Application No. 01 270 874.9-2225.
Bernd Edler, et al., ASAC—Analysis/Synthesis Audio Codec for Very Low Bit Rates, University of Hannover, Germany.

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