Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Markus Lohwasser

Marc Gayer

Markus Schnell

Ralf Geiger

Max Neuendorf

Bernhard Grill

Markus Multrus

Manfred Lutzky

Manuel Jander

Bernd Edler

Gerald Schuller

Markus Schmidt

Michael Mellar

Nikolaus Rettelbach

Frederik Nagel

Ulrich Kraemer

Matthias Hildenbrand

Tobias Chalupka

Sascha Disch

Stefan Bayer

Harald Popp

Virgilio Bacigalupo

Johannes Hilpert

Stefan Geyersberger

Matthias Neusinger

Ralph Sperschneider

Bernhard Neugebauer

Stephan Schreiner

Arne Borsum

Michael Schuldt

Ulrich KRÄMER

Manfred Lutzki

An apparatus for generating a bandwidth extended signal from an input signal includes a patch generator and a combiner. The input signal is represented for first and second bands by first and second resolution data, respectively, the second resolution being lower than the first. The patch generator generates first and second patches from the first band of the input signal according to first and second patching algorithms, respectively. A spectral density of the second patch generated using the second patching algorithm is higher than a spectral density of a first patch generated using the first patching algorithm. The combiner combines both patches and the first band of the input signal to obtain the bandwidth extended signal. The apparatus scales the input signal according to the first and second patching algorithms or scales the first and second patches, so that the bandwidth extended signal fulfills a spectral envelope criterion.

Apparatus and method for generating a bandwidth extended signal

An apparatus for processing an audio signal includes a configurable first audio signal processor for processing the audio signal in accordance with different configuration settings to obtain a processed audio signal, wherein the apparatus is adapted so that different configuration settings result in different sampling rates of the processed audio signal. The apparatus furthermore includes n analysis filter bank having a first number of analysis filter bank channels, a synthesis filter bank having a second number of synthesis filter bank channels, a second audio processor being adapted to receive and process an audio signal having a predetermined sampling rate, and a controller for controlling the first number of analysis filter bank channels or the second number of synthesis filter bank channels in accordance with a configuration setting.

Resampling output signals of QMF based audio codecs

An embodiment of an apparatus for generating audio subband values in audio subband channels includes 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 including a sequence of window coefficients to obtain windowed samples. The analysis window function includes a first number of window coefficients derived from a larger window function including a sequence of a larger second number of window coefficients, wherein the window coefficients of the window function are derived by an interpolation of window coefficients of the larger window function. The apparatus further includes a calculator for calculating the audio subband values using the windowed samples.

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

Growing community of inventors

Hersbruck, Germany

Markus Lohwasser