LPC vector quantization apparatus
US7392179B2 · kind B2 · utility
21Cited by
15References
22Claims
0Family size
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Key dates
| Filing date | Nov 29, 2001 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Jul 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0014
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention carries out pre-selection on many LPC codevectors stored in an LSF codebook 101 using a weighted Euclidean distortion as a measure and carries out a full-code selection on the LPC codevectors left after the pre-selection using an amount of distortion in a spectral space as a measure. This makes it possible to improve the quantization performance of the LPC parameter vector quantizer and improve the quality of synthesized speech of the speech coder/decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.