Apparatus and method for producing an audible speech signal from a non-audible speech signal
US8155966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2007 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Jul 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
[Problems]To convert a signal of non-audible murmur obtained through an in-vivo conduction microphone into a signal of a speech that is recognizable for (hardly misrecognized by) a receiving person with maximum accuracy.[Means for Solving Problems]A speech processing method comprising: a learning step (S7) for conducting a learning calculation of a model parameter of a vocal tract feature value conversion model indicating conversion characteristic of acoustic feature value of vocal tract, on the basis of a learning input signal of non-audible murmur recorded by an in-vivo conduction microphone and a learning output signal of audible whisper corresponding to the learning input signal recorded by a prescribed microphone, and then, storing a learned model parameter in a prescribed storing means; and a speech conversion step (S9) for converting a non-audible speech signal obtained through an in-vivo conduction microphone into a signal of audible whisper, based on a vocal tract feature value conversion model, with a learned model parameter obtained through the learning step set thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.