Speech signal pre-processing system and method of extracting characteristic information of speech signal
First Claim
1. A speech signal pre-processing system comprising:
- a speech signal recognition unit for recognizing speech from an input signal and outputting the input signal as a speech signal;
a speech signal converter for generating a speech signal frame by receiving the speech signal and converting the received speech signal of a time domain to a speech signal of a frequency domain;
a morphological analyzer for receiving the speech signal frame and generating characteristic frequency regions having a morphological analysis-based signal waveform through a morphological operation;
a speech signal characteristic information extractor for receiving the speech signal frame or the morphological analysis-based characteristic frequency regions and extracting speech signal characteristic information requested by a speech signal processing system in a next stage; and
a controller for determining according to a pre-set determination condition whether the characteristic information of the speech signal is extracted using harmonic peaks of the speech signal frame, and extracting the speech signal characteristic information requested by the speech signal processing system by outputting the speech signal frame to the speech signal characteristic information extractor when harmonic peaks are used or outputting the morphological analysis-based characteristic frequency regions of the speech signal frame when harmonic peaks are not used.
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Abstract
A speech signal pre-processing system and a method of extracting characteristic information of a speech signal. To do this, it is determined whether characteristic information of an input speech signal is extracted using harmonic peaks. According to the determination result, a speech signal frame or characteristic frequency regions derived according to a morphological analysis result is (are) input to a speech signal characteristic information extractor for extracting speech signal characteristic information requested by a speech signal processing system in a next stage. The speech signal characteristic information extractor selected by a controller receives the speech signal frame or the characteristic frequency regions derived according to a morphological analysis result and extracts the speech signal characteristic information requested by the speech signal processing system.
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Citations
37 Claims
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1. A speech signal pre-processing system comprising:
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a speech signal recognition unit for recognizing speech from an input signal and outputting the input signal as a speech signal;
a speech signal converter for generating a speech signal frame by receiving the speech signal and converting the received speech signal of a time domain to a speech signal of a frequency domain;
a morphological analyzer for receiving the speech signal frame and generating characteristic frequency regions having a morphological analysis-based signal waveform through a morphological operation;
a speech signal characteristic information extractor for receiving the speech signal frame or the morphological analysis-based characteristic frequency regions and extracting speech signal characteristic information requested by a speech signal processing system in a next stage; and
a controller for determining according to a pre-set determination condition whether the characteristic information of the speech signal is extracted using harmonic peaks of the speech signal frame, and extracting the speech signal characteristic information requested by the speech signal processing system by outputting the speech signal frame to the speech signal characteristic information extractor when harmonic peaks are used or outputting the morphological analysis-based characteristic frequency regions of the speech signal frame when harmonic peaks are not used. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of extracting characteristic information of a speech signal, the method comprising the steps of:
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generating a speech signal frame by recognizing speech from an input signal, extracting the speech, converting the received input signal of a time domain to a speech signal of a frequency domain, and outputting the speech signal;
determining, according to a pre-set determination condition, whether characteristic information of the speech signal is extracted using harmonic peaks of the speech signal frame;
performing a morphological analysis of the speech signal frame according to a harmonic peaks usage determination result and extracting characteristic frequency regions according to a morphological analysis result;
extracting speech signal characteristic information requested by a speech signal processing system in a next stage using the characteristic frequency regions or the speech signal frame according to a harmonic peaks usage determination result; and
outputting the extracted speech signal characteristic information to the speech signal processing system. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification