Method for reducing decoder complexity in waveform interpolation speech decoding by converting dimension of vector
US7848923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2006 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Aug 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is a method for converting a dimension of a vector. The vector dimension conversion method for vector quantization includes the steps of: extracting a specific parameter having a pitch period from an input speech signal and then generating a vector of a dimension that varies according to the pitch period; dividing an entire frequency domain of the generated vector of the variable dimension into at least two frequency domains; and converting the vector of the variable dimension into vectors of mutually different fixed dimensions according to the divided frequency domains. Thereby, not only an error due to the vector dimension conversion is suppressed but codebook memory required for the vector quantization is effectively reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.