Apparatus and method for estimating an inter-channel time difference

US10706861B2 · kind B2 · utility

Assignee

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

Inventors

• Stefan Bayer · Nuremberg, DE
• Eleni FOTOPOULOU · Erlangen, DE
• Markus Multrus · Nuremberg, DE
• Guillaume Fuchs · Erlangen, DE
• Emmanuel Ravelli · Erlangen, DE
• Markus Schnell · Nuremberg, DE
• Stefan Doehla · Erlangen, DE
• Wolfgang Jaegers · Erlangen, DE
• Martin Dietz · Nuremberg, DE
• Goran Markovic · Nuremberg, DE

Key dates

• Filing date: Jul 13, 2018
• Grant date: Jul 7, 2020
• Expiry date: Aug 4, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/03
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, includes: a calculator for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a spectral characteristic estimator for estimating a characteristic of a spectrum of the first channel signal or the second channel signal for the time block; a smoothing filter for smoothing the cross-correlation spectrum over time using the spectral characteristic to obtain a smoothed cross-correlation spectrum; and a processor for processing the smoothed cross-correlation spectrum to obtain the inter-channel time difference.