发明名称 |
Speech signal interpolation device, speech signal interpolation method, and program |
摘要 |
A voice signal interpolation apparatus is provided which can restore original human voices from human voices in a compressed state while maintaining a high sound quality. When a voice signal representative of a voice to be interpolated is acquired by a voice data input unit 1, a pitch deriving unit 2 filters this voice signal to identify a pitch length from the filtering result. A pitch length fixing unit 3 makes the voice signal have a constant time length of a section corresponding to a unit pitch, and generates pitch waveform data. A sub-band dividing unit 4 converts the pitch waveform data into sub-band data representative of a spectrum. A plurality of sub-band data pieces are averaged by an averaging unit 5 and thereafter a sub-band synthesizing unit 6 converts the sub-band data pieces into a signal representative of a waveform of the voice by a sub-band synthesizing unit 6. The time length of this signal in each section is restored by a pitch restoring unit 7 and a sound output unit 8 reproduces the sound represented by the signal.
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申请公布号 |
US2004153314(A1) |
申请公布日期 |
2004.08.05 |
申请号 |
US20030477320 |
申请日期 |
2003.11.10 |
申请人 |
SATO YASUSHI |
发明人 |
SATO YASUSHI |
分类号 |
G10L19/00;G10L11/00;G10L11/04;G10L13/00;G10L19/02;G10L19/08;G10L21/02;(IPC1-7):G10L11/04 |
主分类号 |
G10L19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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