Patent · US Expired

Method and apparatus for fast CELP parameter mapping

US7363218B2 · kind B2 · utility

25Cited by

4References

34Claims

0Family size

Assignee

Dilithium Networks Pty Limited · AU

Inventors

Marwan A. Jabri · Gungahlin, AU
Nicola Chong-White · Fawn Drive, AU
Jianwei Wang · Beaverton, US

Key dates

Filing date	Oct 23, 2003
Grant date	Apr 22, 2008
Priority date	—
Expiry date	Mar 27, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG10L19/173
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the LSP mapping module, and a fixed codebook mapping module coupled to the LSP mapping module and the adaptive codebook mapping module. The LSP mapping module includes an LP overflow module and an LSP parameter modification module. The adaptive codebook mapping module includes a first pitch gain codebook. The fixed codebook mapping module includes a first target processing module, a pulse search module, a fixed codebook gain estimation module, a pulse position searching module.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.