Patent · US Active

Providing a codebook for bandwidth extension of an acoustic signal

US8190429B2 · kind B2 · utility

8Cited by

8References

20Claims

0Family size

Assignee

Nuance Communications, Inc. · US

Inventors

Bernd Iser · Ulm, DE
Gerhard Uwe Schmidt · Ulm, DE

Key dates

Filing date	Mar 13, 2008
Grant date	May 29, 2012
Priority date	—
Expiry date	Jan 13, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG10L2019/0007
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A codebook spectral envelope may be used to extend the bandwidth of a bandwidth limited signal. A system includes codebooks that list codebook spectral envelopes. A codebook spectral envelope may be selected based on a characteristic of the spectral envelope of the bandwidth limited signal. Modifications of selected codebook spectral envelopes may generate a bandwidth extension signal that may be added to the bandwidth limited signal to improve the quality of the signal.

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