Audio signal decorrelator, multi channel audio signal processor, audio signal processor, method for deriving an output audio signal from an input audio signal and computer program

US8538037B2 · kind B2 · utility

Assignee

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

Inventors

• Jürgen Herre · Buckenhof, DE
• Herbert Buchner · Nittendorf, DE

Key dates

• Filing date: Mar 28, 2007
• Grant date: Sep 17, 2013
• Expiry date: Oct 27, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L2021/02082
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An audio signal decorrelator for deriving an output audio signal from an input audio signal has a frequency analyzer for extracting from the input audio signal a first partial signal descriptive of an audio content in a first audio frequency range and a second partial signal descriptive of an audio content in a second audio frequency range having higher frequencies compared to the second audio frequency range. A partial signal modifier modifies the first and second partial signals, to obtain first and second processed partial signals, so that a modulation amplitude of a time variant phase shift or time variant delay applied to the first partial signal is higher than that applied to the second partial signal, or for modifying only the first partial signal. A signal combiner combines the first and second processed partial signals, or combines the first processed partial signal and the second partial signal, to obtain an output audio signal.