Apparatus and a method for generating bandwidth extension output data

US8612214B2 · kind B2 · utility

Assignee

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

Inventors

• Max Neuendorf · Nuremberg, DE
• Bernhard Grill · Lautenbächle, DE
• Ulrich Kraemer · Stuttgart, DE
• Markus Multrus · Nuremberg, DE
• Harald Popp · Tuchenbach, DE
• Nikolaus Rettelbach · Nuremberg, DE
• Frederik Nagel · Nuremberg, DE
• Markus Lohwasser · Hersbruck, DE
• Marc Gayer · Erlangen, DE
• Manuel Jander · Hemhofen, DE
• Virgilio Bacigalupo · Nuremberg, DE

Key dates

• Filing date: Jan 11, 2011
• Grant date: Dec 17, 2013
• Expiry date: Sep 1, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/20
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating bandwidth extension output data for an audio signal has a noise floor measurer, a signal energy characterizer and a processor. The audio signal has components in a first frequency band and components in a second frequency band, the bandwidth extension output data are adapted to control a synthesis of the components in the second frequency band. The noise floor measurer measures noise floor data of the second frequency band for a time portion of the audio signal. The signal energy characterizer derives energy distribution data, the energy distribution data characterizing an energy distribution in a spectrum of the time portion of the audio signal. The processor combines the noise floor data and the energy distribution data to obtain the bandwidth extension output data.