Multipulse interpolative coding of transition speech frames
US6260017A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | May 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multipulse interpolative coder for transition speech frames includes an extractor configured to represent a first frame of transitional speech samples by a subset of the samples of the frame. The coder also includes an interpolator configured to interpolate the subset of samples and a subset of samples extracted from an earlier-received frame to synthesize other samples of the first frame that are not included in the subset. The subset of samples is further simplified by selecting a set of pulses from the subset and assigning zero values to unselected pulses. In the alternative, a portion of the unselected pulses may be quantized. The set of pulses may be the pulses having the greatest absolute amplitudes in the subset. In the alternative, the set of pulses may be the most perceptually significant pulses of the subset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.