Patent · US Active

Apparatus and method for generating an ambient signal from an audio signal, apparatus and method for deriving a multi-channel audio signal from an audio signal and computer program

US8346565B2 · kind B2 · utility

7Cited by

6References

31Claims

0Family size

Assignee

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

Inventors

Christian Uhle · Nuremberg, DE
Juergen Herre · Erlangen, DE
Andreas Walther · Könnern, DE
Oliver Hellmuth · Erlangen, DE
Christiaan Janssen · Berlin, DE

Key dates

Filing date	Oct 23, 2007
Grant date	Jan 1, 2013
Priority date	—
Expiry date	Jan 25, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2420/03
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An apparatus for generating an ambient signal from an audio signal includes a compressor for lossy compression of a representation of the audio signal so as to obtain a compressed representation of the audio signal describing a compressed audio signal. The apparatus for generating the ambient signal further includes a calculator for calculating a difference between the compressed representation of the audio signal and the representation of the audio signal so as to obtain a discrimination representation. The apparatus further includes a provider for providing the ambient signal using the discrimination representation. An apparatus for deriving a multi-channel audio signal from an audio signal includes an apparatus for generating an ambient signal from an audio signal, an apparatus for providing the audio signal as a front-loudspeaker signal and an apparatus for providing the ambient signal as a back-loudspeaker signal.

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