| Presentation | 1997/9/11 A Low Bit Rate Speech Coding with Sinusoids Based on Perceptual Characteristics Fumiaki MATSUMOTO, Junsei SATO, Minoru KOHATA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A very low bit rate speech coder at l.2kbps is newly proposed. In this coder which is similar to the LPC vocoder, speech signal is synthesized using sinusoids whose frequencies are multiple of the fundamental frequency, and whose amplitudes are adaptively modulated based on auditory perceptual characteristics, in order to improve the quality. In this paper, the basics of the sinusoids synthesizer are introduced, then how to modulate the sinusoids based on perceptual characteristics is explained, The auditory perceptual characteristics are simulated by Gamma-tone filters. And a new segment coder of spectral information (LSP coefficients) using DP matching is also proposed to reduce the total bit rate to 1.2kbps. The quality of the synthesized speech is farely improved compared with that of the simple LPC vocoder according to an informal listening test. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | perceptual coding / very low bit speech coding / Gammatone filter / auditory characteristics / harmonic coding |
| Paper # | SP97-40 |
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| Conference Information | |
| Committee | SP |
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| Conference Date | 1997/9/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | A Low Bit Rate Speech Coding with Sinusoids Based on Perceptual Characteristics |
| Sub Title (in English) | |
| Keyword(1) | perceptual coding |
| Keyword(2) | very low bit speech coding |
| Keyword(3) | Gammatone filter |
| Keyword(4) | auditory characteristics |
| Keyword(5) | harmonic coding |
| 1st Author's Name | Fumiaki MATSUMOTO |
| 1st Author's Affiliation | Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Junsei SATO |
| 2nd Author's Affiliation | Graduate School of Engineering, Tohoku University |
| 3rd Author's Name | Minoru KOHATA |
| 3rd Author's Affiliation | Graduate School of Engineering, Tohoku University |
| Date | 1997/9/11 |
| Paper # | SP97-40 |
| Volume (vol) | vol.97 |
| Number (no) | 248 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |