Apparatus and method for computing control information for an echo suppression filter and apparatus and method for computing a delay value

US8731207B2 · kind B2 · utility

Assignee

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

Inventors

• Fabian Kuech · Erlangen, DE
• Markus Kallinger · Erlangen, DE
• Christof Faller · New Providence, US
• Alexis Favrot · Suhr, CH

Key dates

• Filing date: Jan 12, 2009
• Grant date: May 20, 2014
• Expiry date: Aug 19, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M9/082
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An embodiment of an apparatus for computing control information for a suppression filter for filtering a second audio signal to suppress an echo based on a first audio signal includes a computer having a value determiner for determining at least one energy-related value for a band-pass signal of at least two temporally successive data blocks of at least one signal of a group of signals. The computer further includes a mean value determiner for determining at least one mean value of the at least one determined energy-related value for the band-pass signal. The computer further includes a modifier for modifying the at least one energy-related value for the band-pass signal on the basis of the determined mean value for the band-pass signal. The computer further includes a control information computer for computing the control information for the suppression filter on the basis of the at least one modified energy-related value.