Patent · US Active

Device and method for a bandwidth extension of an audio signal

US8996362B2 · kind B2 · utility

8Cited by

6References

21Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Frederik Nagel · Nuremberg, DE
Sascha Disch · Bad Mergentheim, DE
Max Neuendorf · Nuremberg, DE

Key dates

Filing date	Jan 20, 2009
Grant date	Mar 31, 2015
Priority date	—
Expiry date	Nov 7, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG10L21/038
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a demicator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

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