Speech encoding system with increased frequency of determination of analysis coefficients in vicinity of transitions between voiced and unvoiced speech segments
US6128591A · kind A · utility
8Cited by
13References
12Claims
0Family size
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Key dates
| Filing date | Jul 13, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Jul 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a speech encoder (4), a speech signal is encoded using a voiced speech encoder (16) and an unvoiced speech encoder (14). Both speech encoders (14,16) use analysis coefficients to represent the speech signal. The analysis coefficients are determined more frequently when a transition from voiced to unvoiced speech or vice versa is detected. This has been found to achieve significantly improved quality of speech reproduced from the encoded speech signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.