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

Dolby International Ab

Agere Systems Inc.

Koninklijke Philips Corporation N.v.

Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E. V.

Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Coding Technologies Ab

Dolby Laboratories Licensing Corporation

Koninklijke Philips Electronics N.v.

Agere System Inc.

Disch, Sascha

Sascha Disch

Frederik Nagel

Ralf Geiger

Guillaume Fuchs

Juergen Herre

Christian Helmrich

Bernd Edler

Markus Multrus

Konstantin Schmidt

Stefan Bayer

Max Neuendorf

Christian Neukam

Matthias Neusinger

Benjamin Schubert

Oliver Hellmuth

Nikolaus Rettelbach

Andreas Niedermeier

Jouni Paulus

Bernhard Grill

Emmanuel Ravelli

Harald Fuchs

Leon Terentiv

Adrian Murtaza

Johannes Hilpert

Falko Ridderbusch

Stephan Wilde

Balaji Nagendran Thoshkahna

Lars Villemoes

Jürgen Herre

Martin Dietz

Marc Gayer

Ulrich Kraemer

Gerald Schuller

Christian Griebel

Per Ekstrand

Markus Schnell

Mikko-Ville Laitinen

Ville Topias Pulkki

Goran Markovic

Markus Lohwasser

Florin Ghido

Julien Robilliard

Franz Reutelhuber

Dominik Zorn

Tom Baeckstroem

Conrad Benndorf

Alexander Adami

Achim Kuntz

Harald Popp

Christian Uhle

Stefan Wabnik

Peter Prokein

Patrick Gampp

Julia Havenstein

Antonios Karampourniotis

Christof Faller

Manuel Jander

Fabian Kuech

Jeremie Lecomte

Christian Borss

Jan Buethe

Maria Luis Valero

Heiko Purnhagen

Dirk Jeroen Breebaart

Christian Ertel

Alexandre Bouthéon

Jonas Engdegard

Stefan Geyersberger

Jérémie Lecomte

Manfred Lutzky

Jan Plogsties

Andreas Hoelzer

Eleni Fotopoulou

Erik Schuijers

Kristofer Kjoerling

Pontus Carlsson

Oliver Thiergart

Sascha Dick

Grzegorz Pietrzyk

Karsten Linzmeier

Michael Fischer

Jan Büthe

Fabian Küch

Gerard Herman Hotho

Thorsten Kastner

Kristofer Kjörling

Jeroen Dirk Breebaart

Harald Mundt

Michael Kratschmer

Jens Hirschfeld

Mikko-ville Laitinen

Eric Allamanche

Pallavi Maben

Srikanth Korse

Patrick Warmbold

Andreas Silzle

Yoshikazu Yokotani

Christian Neubauer

Simone Fueg

Ralph Kulessa

An audio encoder for providing an output signal using an input audio signal includes a patch generator, a comparator and an output interface. The patch generator generates at least one bandwidth extension high-frequency signal, wherein a bandwidth extension high-frequency signal includes a high-frequency band. The high-frequency band of the bandwidth extension high-frequency signal is based on a low frequency band of the input audio signal. A comparator calculates a plurality of comparison parameters. A comparison parameter is calculated based on a comparison of the input audio signal and a generated bandwidth extension high-frequency signal. Each comparison parameter of the plurality of comparison parameters is calculated based on a different offset frequency between the input audio signal and a generated bandwidth extension high-frequency signal. Further, the comparator determines a comparison parameter from the plurality of comparison parameters, wherein the determined comparison parameter fulfils a predefined criterion.

Audio encoder and bandwidth extension decoder

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

A device and method for manipulating an audio signal includes a windower for generating a plurality of consecutive blocks of audio samples, the plurality of consecutive blocks including at least one padded block of audio samples, the padded block having padded values and audio signal values, a first converter for converting the padded block into a spectral representation having spectral values, a phase modifier for modifying phases of the spectral values to obtain a modified spectral representation and a second converter for converting the modified spectral representation into a modified time domain audio signal.

Device and method for manipulating an audio signal

A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation is configured to render a plurality of decoded audio signals, which are obtained on the basis of the encoded representation, in dependence on one or more rendering parameters, to obtain a plurality of rendered audio signals. The multi-channel audio decoder is configured to derive one or more decorrelated audio signals from the rendered audio signals, and to combine the rendered audio signals, or a scaled version thereof, with the one or more decorrelated audio signals, to obtain the output audio signals. A multi-channel audio encoder provides a decorrelation method parameter to control an audio decoder.

Multi-channel audio decoder, multi-channel audio encoder, methods, computer program and encoded audio representation using a decorrelation of rendered audio signals

An apparatus for decoding an encoded multichannel signal includes: a base channel decoder for decoding an encoded base channel to acquire a decoded base channel; a decorrelation filter for filtering at least a portion of the decoded base channel to acquire a filling signal; and a multichannel processor for performing a multichannel processing using a spectral representation of the decoded base channel and a spectral representation of the filling signal, wherein the decorrelation filter is a broad band filter and the multichannel processor is configured to apply a narrow band processing to the spectral representation of the decoded base channel and the spectral representation of the filling signal.

Apparatus for encoding or decoding an encoded multichannel signal using a filling signal generated by a broad band filter

A multisignal encoder for encoding at least three audio signals, including: a signal preprocessor for individually preprocessing each audio signal to obtain at least three preprocessed audio signals, wherein the preprocessing is performed so that a preprocessed audio signal is whitened with respect to the signal before preprocessing; an adaptive joint signal processor for performing a processing of the at least three preprocessed audio signals to obtain at least three jointly processed signals or at least two jointly processed signals and an unprocessed signal; a signal encoder for encoding each signal to obtain one or more encoded signals; and an output interface for transmitting or storing an encoded multisignal audio signal including the one or more encoded signals, side information relating to the preprocessing and side information relating to the processing.

Multisignal audio coding using signal whitening as processing

An audio decoder for providing a decoded audio information on the basis of an encoded audio information includes a linear-prediction-domain decoder configured to provide a first decoded audio information on the basis of an audio frame encoded in a linear prediction domain, a frequency domain decoder configured to provide a second decoded audio information on the basis of an audio frame encoded in a frequency domain, and a transition processor. The transition processor is configured to obtain a zero-input-response of a linear predictive filtering, wherein an initial state of the linear predictive filtering is defined depending on the first decoded audio information and the second decoded audio information, and modify the second decoded audio information depending on the zero-input-response, to obtain a smooth transition between the first and the modified second decoded audio information.

Audio decoder, method and computer program using a zero-input-response to obtain a smooth transition

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

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Fuerth, Germany

Sascha Disch