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

Dolby International Ab

Voiceage Corporation

Disch, Sascha

Stephan Wilde

Sascha Disch

Frederik Nagel

Lars Villemoes

Per Ekstrand

Konstantin Schmidt

Andreas Niedermeier

Ralf Geiger

Matthias Neusinger

Benjamin Schubert

Christian Neukam

Max Neuendorf

Panji Setiawan

Markus Multrus

Martin Dietz

Daniel Fischer

Marc Gayer

Matthias Hildenbrand

Anthony Lombard

Guillaume Fuchs

Bernhard Grill

Christian Helmrich

Johannes Hilpert

Nikolaus Rettelbach

Emmanuel Ravelli

Bruno Bessette

Julien Robilliard

Philippe Gournay

Roch Lefebvre

An apparatus for processing an input audio signal relies on a cascade of filterbanks, the cascade having a synthesis filterbank for synthesizing an audio intermediate signal from the input audio signal, the input audio signal being represented by a plurality of first subband signals generated by an analysis filterbank, wherein a number of filterbank channels of the synthesis filterbank is smaller than a number of channels of the analysis filterbank. The apparatus furthermore has a further analysis filterbank for generating a plurality of second subband signals from the audio intermediate signal, wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank, so that a sampling rate of a subband signal of the plurality of second subband signals is different from a sampling rate of a first subband signal of the plurality of first subband signals.

Apparatus and method for processing an input audio signal using cascaded filterbanks

An apparatus for generating an enhanced signal from an input signal, wherein the enhanced signal has spectral values for an enhancement spectral region, the spectral values for the enhancement spectral regions not being contained in the input signal, includes a mapper for mapping a source spectral region of the input signal to a target region in the enhancement spectral region, the source spectral region including a noise-filling region; and a noise filler configured for generating first noise values for the noise-filling region in the source spectral region of the input signal and for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from the first noise values or for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from first noise values in the source region.

Apparatus and method for generating an enhanced signal using independent noise-filling identified by an identification vector

Apparatus and method for generating an enhanced signal using independent noise-filling at random values and scaling thereupon

Apparatus and method for generating an enhanced signal using independent noise-filling

Apparatus and method for generating an enhanced signal using independent noise-filling information which comprises energy information and is included in an input signal

An apparatus for generating a bandwidth extended signal from a bandwidth limited audio signal, the bandwidth limited audio signal The patch generator is configured to perform a harmonic patching algorithm to obtain the patched signal. The signal manipulator is configured for manipulating a signal before patching or the patched signal. The timely preceding bandwidth limited time block timely precedes the current bandwidth limited time block in the plurality of consecutive bandwidth limited time blocks of the bandwidth limited audio signal. The combiner is configured for combining the bandwidth limited audio signal having the core frequency band and the manipulated patched signal having the upper frequency band to obtain the bandwidth extended signal.

Apparatus and method for generating a bandwidth extended signal from a bandwidth limited audio signal

An apparatus for decoding an encoded audio signal including bandwidth extension control data indicating either a first harmonic bandwidth extension mode or a second non-harmonic bandwidth extension mode, includes: an input interface for receiving the encoded audio signal including the bandwidth extension control data indicating either the first harmonic bandwidth extension mode or the second non-harmonic bandwidth extension mode; a processor for decoding the audio signal using the second non-harmonic bandwidth extension mode; and a controller for controlling the processor to decode the audio signal using the second non-harmonic bandwidth extension mode, even when the bandwidth extension control data indicates the first harmonic bandwidth extension mode for the encoded signal.

Apparatus and method for decoding an encoded audio signal with low computational resources

Growing community of inventors

Wendelstein, Germany

Stephan Wilde