Speech processing method and apparatus for improving speech quality and speech recognition performance
US7440891B1 · kind B1 · utility
73Cited by
8References
8Claims
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Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Mar 5, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech processing apparatus which, in the process of performing echo canceling by using a pseudo acoustic echo signal, continuously uses an impulse response used for the previous frame as an impulse response to generate the pseudo acoustic echo signal when a voice is contained in the microphone input signal, and which uses a newly updated impulse response when a voice is not contained in the microphone input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.