Target sound analysis apparatus, target sound analysis method and target sound analysis program
First Claim
1. A target sound analysis apparatus that analyzes whether or not an evaluation sound contains a target sound, said target sound analysis apparatus comprising:
- a target sound preparation unit operable to prepare the target sound that is an analysis waveform to be used for analyzing a fundamental period;
an evaluation sound preparation unit operable to prepare the evaluation sound that is a to-be-analyzed waveform in which a fundamental period is to be analyzed; and
an analysis unit operable to (i) sequentially calculate differential values between the evaluation sound and the target sound at corresponding points in time, by temporally shifting the target sound with respect to the evaluation sound, (ii) calculate an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judge whether or not the target sound exists in the evaluation sound, based on a period of the iterative interval and the fundamental period of the target sound.
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Accused Products
Abstract
A target sound analysis apparatus capable of distinguishing between a sound having the same fundamental period as a target sound but which differs therefrom and the target sound and analyzing whether or not the target sound is contained in an evaluation sound is an target sound analysis apparatus that analyzes whether or not a target sound is included in an evaluation sound, and includes: a target sound preparation unit that prepares a target sound that is an analysis waveform to be used for analyzing a fundamental period; an evaluation sound preparation unit that prepares an evaluation sound that is an analyzed waveform in which its fundamental period will be analyzed; and an analysis unit that temporally shifts the target sound with respect to the evaluation sound to sequentially calculate differential values of the evaluation sound and the target sound at corresponding points in time, calculate an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and judge whether or not the target sound exists in the evaluation sound based on a period of the iterative interval and the fundamental period of the target sound.
15 Citations
12 Claims
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1. A target sound analysis apparatus that analyzes whether or not an evaluation sound contains a target sound, said target sound analysis apparatus comprising:
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a target sound preparation unit operable to prepare the target sound that is an analysis waveform to be used for analyzing a fundamental period; an evaluation sound preparation unit operable to prepare the evaluation sound that is a to-be-analyzed waveform in which a fundamental period is to be analyzed; and an analysis unit operable to (i) sequentially calculate differential values between the evaluation sound and the target sound at corresponding points in time, by temporally shifting the target sound with respect to the evaluation sound, (ii) calculate an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judge whether or not the target sound exists in the evaluation sound, based on a period of the iterative interval and the fundamental period of the target sound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A target sound analysis method of analyzing whether or not an evaluation sound contains a target sound, said target sound analysis method comprising steps of:
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preparing a target sound that is an analysis waveform to be used for analyzing a fundamental period; preparing an evaluation sound that is a to-be-analyzed waveform in which the fundamental period is to be analyzed; and (i) sequentially calculating differential values between the evaluation sound and the target sound at corresponding points in time, by temporally shifting the target sound with respect to the evaluation sound, (ii) calculating an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judging whether or not the target sound exists in the evaluation sound, based on a period of the iterative interval and the fundamental period of the target sound.
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12. A program that analyzes whether or not an evaluation sound contains a target sound, said program causing a computer to execute steps of:
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preparing a target sound that is an analysis waveform to be used for analyzing a fundamental period; preparing an evaluation sound that is a to-be-analyzed waveform in which the fundamental period is to be analyzed; and (i) sequentially calculating differential values between the evaluation sound and the target sound at corresponding points in time, by temporally shifting the target sound with respect to the evaluation sound, (ii) calculating an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judging whether or not the target sound exists in the evaluation sound, based on a period of the iterative interval and the fundamental period of the target sound.
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Specification