Voice coding process and device for implementing said process
US5001758A · kind A · utility
83Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1987 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Apr 8, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The voice signal is analyzed to derive therefrom a low frequency base band signal, linear prediction coefficients and high frequency (HF) descriptors. Said HF descriptors include HF energy indications as well as indications relative to the phase shift between the low frequency and the high frequency band. Said HF descriptors are used during the voice synthesis operation to provide an inphase HF bandwidth component to be added to the base band prior to be used for driving a linear prediction synthesis filter tuned using said linear prediction parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.