Vector quantization in a harmonic speech coding arrangement
US5023910A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Apr 8, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A harmonic speech coding arrangement where vector quantization is used to improve speech quality. Parameters are determined at the analyzer of an illustrative coding arrangement to model the magnitude and phase spectra of the input speech. A first codebook of vectors is searched for a vector that closely approximates the difference between the true and estimated magnitude spectra. A second codebook of vectors is searched for a vector that closely approximates the difference between the true and the estimated phase spectra. Indices and scaling factors for the vectors are communicated to the synthesizer such that scaled vectors can be added into the magnitude and phase spectra for use at the synthesizer in generating speech as a sum of sinusoids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.