Paper Abstract and Keywords |
Presentation |
2005-11-18 13:00
A trial of analyzing an acoustic signal by time-frequency analysis
-- Introduction of Copula-based positive time-frequency distribution -- Noboru Nakasako, Yurie Murakami (Kinki Univ.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Various methods have been proposed to investigate the property of acoustic signals. Especially, a time -frequency analysis which can treat both properties in a time and frequency domains is very often utilized as a powerful analyzing tool. The usual time-frequency analysis method (e.g., spectrogram(short-time Fourier transform), Wigner distribution, Choi-Williams distribution), however, have the indeterminacy relationship between time and frequency. The energy distribution in time-frequency analysis doesn't satisfy all conditions for a non-negaitive distribution. In this report, the Copula-based positive time-frequency distribution is introduced which satisfy the marginal condition and so on, and resultantly it can be expected to improve the resolution of time and frequency simultaneously in comparison with Spectrogram. More concretely, we analyze a musical sound with the Copula-based positive time-frequency distribution. Spectrogram is adopted here as the template of transformation based on Copula. It is found that Copula-based Positive time-frequency distribution can enhance the resolution of both time and frequency rather than the Spectrogram. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Copula / positive time-frequency distribution / Spectrogram / resolution / 2 dimensional cumulative distribution / / / |
Reference Info. |
IEICE Tech. Rep., vol. 105, no. 404, EA2005-79, pp. 31-36, Nov. 2005. |
Paper # |
EA2005-79 |
Date of Issue |
2005-11-11 (EA) |
ISSN |
Print edition: ISSN 0913-5685 |
Download PDF |
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Conference Information |
Committee |
EA |
Conference Date |
2005-11-17 - 2005-11-18 |
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(See Japanese page) |
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Paper Information |
Registration To |
EA |
Conference Code |
2005-11-EA |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A trial of analyzing an acoustic signal by time-frequency analysis |
Sub Title (in English) |
Introduction of Copula-based positive time-frequency distribution |
Keyword(1) |
Copula |
Keyword(2) |
positive time-frequency distribution |
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Spectrogram |
Keyword(4) |
resolution |
Keyword(5) |
2 dimensional cumulative distribution |
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1st Author's Name |
Noboru Nakasako |
1st Author's Affiliation |
Kinki University (Kinki Univ.) |
2nd Author's Name |
Yurie Murakami |
2nd Author's Affiliation |
Kinki University (Kinki Univ.) |
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Speaker |
Author-2 |
Date Time |
2005-11-18 13:00:00 |
Presentation Time |
30 minutes |
Registration for |
EA |
Paper # |
EA2005-79 |
Volume (vol) |
vol.105 |
Number (no) |
no.404 |
Page |
pp.31-36 |
#Pages |
6 |
Date of Issue |
2005-11-11 (EA) |
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