| Presentation | 2004/8/12 Local Vector Coding for Quasi-Periodic Signal Masashi ITO, Masafumi YANO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Voiced sound and sound of some musical instruments show quasi-periodicity, of which amplitude and frequency change continually. Provided that the initial phase, the instantaneous amplitude and frequency of the sound, it is easy to identify its waveform. However, it is great difficult to accurately solve the inverse problem, that is, to determine these parameters from the quasi-periodic sound wave. Here, we propose the LVC (Local Vector Coding) method, which enables the estimation of not only the instantaneous amplitude and frequency but also their change rates. Using two kinds of input signals, we demonstrated that the LVC method is superior in estimation of these parameters to the traditional method. The decoded signal well agrees with the input one, showing maximally -34 dB of the residual energy to that of the input signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Quasi-periodic signal / Coding / Instantaneous frequency |
| Paper # | EA2004-31 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2004/8/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Local Vector Coding for Quasi-Periodic Signal |
| Sub Title (in English) | |
| Keyword(1) | Quasi-periodic signal |
| Keyword(2) | Coding |
| Keyword(3) | Instantaneous frequency |
| 1st Author's Name | Masashi ITO |
| 1st Author's Affiliation | Research Institute of Electrical Communication, Tohoku University() |
| 2nd Author's Name | Masafumi YANO |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 2004/8/12 |
| Paper # | EA2004-31 |
| Volume (vol) | vol.104 |
| Number (no) | 246 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |