Speech signal restoration device and speech signal restoration method
US8706497B2 · kind B2 · utility
0Cited by
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8Claims
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Key dates
| Filing date | Oct 22, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Oct 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A synthesis filter 106 synthesizes a plurality of wide-band speech signals by combining wide-band phoneme signals and sound source signals from a speech signal code book 105, and a distortion evaluation unit 107 selects one of the wide-band speech signals with a minimum waveform distortion with respect to an up-sampled narrow-band speech signal output from a sampling conversion unit 101. A first bandpass filter 103 extracts a frequency component outside a narrow-band of the wide-band speech signal and a band synthesis unit 104 combines it with the up-sampled narrow-band speech signal.
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