Efficient use of phase information in audio encoding and decoding

US8255228B2 · kind B2 · utility

Assignee

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

Inventors

• Johannes Hilpert · Nuremberg, DE
• Bernhard Grill · Lautenbächle, DE
• Matthias Neusinger · Meiningen, DE
• Julien Robilliard · Nuremberg, DE
• Maria Luis-Valero · Erlangen, DE

Key dates

• Filing date: Jan 11, 2011
• Grant date: Aug 28, 2012
• Expiry date: Jan 11, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/008
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An efficient encoded representation of a first and a second input audio signal can be derived using correlation information indicating a correlation between the first and the second input audio signals, when a signal characterization information, indicating at least a first or a second, different characteristic of the input audio signal is additionally considered. Phase information indicating a phase relation between the first and the second input audio signals is derived, when the input audio signals have the first characteristic. The phase information and a correlation measure are included into the encoded representation when the input audio signals have the first characteristic, and only the correlation information is included into the encoded representation when the input audio signals have the second characteristic.