| Presentation | 1997/2/21 THE IF SPECTROGRAM : AN APPROACH FOR TIME-FREQUENCY REPRESENTATION OF SPEECH Toshihiko Abe, Takao Kobayashi, Satoshi Imai, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose a new spectral representation, the instantaneous frequency (IF) spectrogram, which more clearly shows the harmonic structure of quasi-periodic signals such as speech than conventional time-frequency (TF) representations such as the short time Fourier transform (STFT) spectrograms. In the IF spectrogram, harmonic components have very sharp spectral peaks and the harmonic structure is clearly seen. Next, we incorporate time-warping into the IF spectrogram to avoid overlapping of the harmonics in the spectrogram, that is caused by rapid change of the harmonic frequencies. The time-warping is applied to the signal frame by frame according to the change of the harmonic frequencies. As a result, we can obtain a spectrogram which shows sharp harmonic structures. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | time-frequency representation / instantaneous frequency / time-warping |
| Paper # | SP96-121 |
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| Conference Information | |
| Committee | SP |
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| Conference Date | 1997/2/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
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| Paper Information | |
| Registration To | Speech (SP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | THE IF SPECTROGRAM : AN APPROACH FOR TIME-FREQUENCY REPRESENTATION OF SPEECH |
| Sub Title (in English) | |
| Keyword(1) | time-frequency representation |
| Keyword(2) | instantaneous frequency |
| Keyword(3) | time-warping |
| 1st Author's Name | Toshihiko Abe |
| 1st Author's Affiliation | Precision and Intelligence Laboratory, Tokyo Institute of Technology() |
| 2nd Author's Name | Takao Kobayashi |
| 2nd Author's Affiliation | Precision and Intelligence Laboratory, Tokyo Institute of Technology |
| 3rd Author's Name | Satoshi Imai |
| 3rd Author's Affiliation | Precision and Intelligence Laboratory, Tokyo Institute of Technology |
| Date | 1997/2/21 |
| Paper # | SP96-121 |
| Volume (vol) | vol.96 |
| Number (no) | 540 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |