Method of storing reflection coeffients in a vector quantizer for a speech coder to provide reduced storage requirements
US5826224A · kind A · utility
30Cited by
9References
6Claims
0Family size
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Key dates
| Filing date | Feb 29, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Feb 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An input speech signal is encoded as one or more reflection coefficients. To reduce storage requirements, the reflection coefficients are scalar quantized by storing an N-bit code rather than the entire reflection coefficient. An exemplary value for N is 8. A table is provided having 2.sup.N reflection coefficient values. The N-bit code is used to look up reflection coefficient values from the table. To reduce spectral distortion due to scalar quantization, the reflection coefficient values in the table are non-linearly scaled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.