Direction of arrival estimation using watermarked audio signals and microphone arrays

US11176952B2 · kind B2 · utility

Assignee

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

Inventors

• Oliver Thiergart · Forchheim, DE
• Giovanni Del Galdo · Martinroda, DE
• Florian Kolbeck · Erlangen, DE
• Alexandra Craciun · Erlangen, DE
• Stefan Kraegeloh · Erlangen, DE
• Juliane Borsum · Erlangen, DE
• Tobias Bliem · Erlangen, DE

Key dates

• Filing date: Feb 25, 2014
• Grant date: Nov 16, 2021
• Expiry date: Feb 25, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04R2430/03
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus for providing direction information based on a reproduced audio signal with an embedded watermark includes a signal processor, which is adapted to process at least two received watermarked audio signals recorded by at least two audio receivers at different spatial positions. The signal processor is adapted to process the received watermarked audio signals to obtain a receiver-specific information for each received watermarked audio signal. The receiver-specific information depends on the embedded watermarks embedded in the received watermarked audio signals. Moreover, the apparatus includes a direction information provider for providing direction information based on the receiver-specific information for each received watermarked audio signal.