Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples

US8452605B2 · kind B2 · utility

Assignee

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

Inventors

• Markus Schnell · Nuremberg, DE
• Manfred Lutzky · Nuremberg, DE
• Markus Lohwasser · Hersbruck, DE
• Markus Schmidt · Seibersbach, DE
• Marc Gayer · Erlangen, DE
• Michael Mellar · Ludwigshafen, DE
• Bernd Edler · Hannover, DE
• Markus Multrus · Nuremberg, DE
• Gerald Schuller · Erfurt, DE
• Ralf Geiger · Erlangen, DE
• Bernhard Grill · Lautenbächle, DE

Key dates

• Filing date: Oct 23, 2007
• Grant date: May 28, 2013
• Expiry date: May 16, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L21/038
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An embodiment of an apparatus for generating audio subband values in audio subband channels has an analysis windower for windowing a frame of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function having a sequence of window coefficients to obtain windowed samples. The analysis window function has a first group of window coefficients and a second group of window coefficients. The first group of window coefficients is used for windowing later time-domain samples and the second group of window coefficients is used for windowing an earlier time-domain samples. The apparatus further has a calculator for calculating the audio subband values using the windowed samples.