Processor, method and computer program for processing an audio signal using truncated analysis or synthesis window overlap portions

US10262666B2 · kind B2 · utility

Assignee

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

Inventors

• Guillaume Fuchs · Erlangen, DE
• Markus Multrus · Nuremberg, DE
• Matthias Neusinger · Meiningen, DE
• Andreas Niedermeier · Munich, DE
• Markus Schnell · Nuremberg, DE

Key dates

• Filing date: Jan 27, 2017
• Grant date: Apr 16, 2019
• Expiry date: Jan 27, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L21/028
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A processor for processing an audio signal has: an analyzer for deriving a window control signal from the audio signal indicating a change from a first asymmetric window to a second window, or indicating a change from a third window to a fourth asymmetric window, wherein the second window is shorter than the first window, or wherein the third window is shorter than the fourth window; a window constructor for constructing the second window using a first overlap portion of the first asymmetric window, wherein the window constructor is configured to determine a first overlap portion of the second window using a truncated first overlap portion of the first asymmetric window, or wherein the window constructor is configured to calculate a second overlap portion of the third window using a truncated second overlap portion of the fourth asymmetric window; and a windower for applying the first and second windows or the third and fourth windows to obtain windowed audio signal portions.