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

Voiceage Corporation

Dolby International Ab

Koninklijke Philips Corporation N.v.

Fraunhofer-gesellschaft Zur F&#xd6;rderung Der Angewandten Forschung E.v.

Stefan Bayer

Guillaume Fuchs

Markus Multrus

Ralf Geiger

Sascha Disch

Max Neuendorf

Bernd Edler

Nikolaus Rettelbach

Frederik Nagel

Ulrich Kraemer

Bernhard Grill

Wolfgang Jaegers

Johannes Hilpert

Gerald Schuller

Redwan Salami

Jeremie Lecomte

Christian Helmrich

Harald Popp

Bruno Bessette

Konstantin Schmidt

Christian Neukam

Oliver Thiergart

Fabian Küch

Stefan Geyersberger

Eleni Fotopoulou

Florin Ghido

Emmanuel Ravelli

Jérémie Lecomte

Jürgen Herre

Goran Markovic

Markus Schnell

Martin Dietz

Stefan Doehla

Juergen Herre

Marc Gayer

Markus Lohwasser

Julien Robilliard

Stefan Wabnik

Lars Villemoes

Manuel Jander

Oliver Wuebbolt

Fabian Kuech

Philippe Gournay

Roch Lefebvre

Balaji Nagendran Thoshkahna

Jimmy Lapierre

Stefan Döhla

Oliver Wübbolt

Alexandre Bouthéon

Jens Hirschfeld

Christian Borss

Tom Baeckstroem

Srikanth Korse

Albertus Cornelis Den Brinker

Sascha Dick

Jan Büthe

Jan Buethe

Pallavi Maben

Andrea Eichenseer

Yoshikazu Yokotani

Patrick Warmbold

Stefam Geyersberger

Raif Geiger

Bernard Grill

Tom BÄCKSTRÖM

Wolfgang JÄGERS

Julien Robillard

Wolfgang Jagers

Alexandre Boutheon

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 generating a synthesis audio signal using a patching control signal has a first converter, a spectral domain patch generator, a high frequency reconstruction manipulator and a combiner. The first converter is configured for converting a time portion of an audio signal into a spectral representation. The spectral domain patch generator is configured for performing a plurality of different spectral domain patching algorithms, wherein each patching algorithm generates a modified spectral representation having spectral components in an upper frequency band derived from corresponding spectral components in a core frequency band of the audio signal. The spectral domain patch generator is furthermore configured to select a first spectral domain patching algorithm from the plurality of patching algorithms for a first time portion and a second spectral domain patching algorithm from the plurality of patching algorithm for a second different time portion in accordance with the patching control signal to obtain the modified spectral representation.

Apparatus and method for generating a synthesis audio signal and for encoding an audio signal

An audio encoder has a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first and second encoding branches, the second encoding branch having a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and the second encoding branch having a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder has a first domain decoder, a second domain decoder, and a third domain decoder as well as two cascaded switches for switching between the decoders.

Low bitrate audio encoding/decoding scheme having cascaded switches

An apparatus for generating a decoded two-channel signal, comprising: a parametric decoder for providing parametric data for a second set of second spectral portions and a two-channel identification identifying for a second spectral portion of the second set of second spectral portions either a first two-channel representation for the second spectral portion of the second set of second spectral portions or a second two-channel representation for the second spectral portion of the second set of second spectral portions, the second two-channel representation being different from the first two-channel representation; and a frequency regenerator for regenerating the second spectral portion of the second set of second spectral portions depending on a first spectral portion of a first set of first spectral portions, the parametric data for the second spectral portion of the second set of second spectral portions and the two-channel identification for the second spectral portion of the second set of second spectral portions to acquire a regenerated second spectral portion of the second set of second spectral portions.

Audio encoder, audio decoder and related methods using two-channel processing within an intelligent gap filling framework

An apparatus for encoding directional audio coding parameters including diffuseness parameters and direction parameters includes: a parameter calculator for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.

Apparatus and method for encoding or decoding directional audio coding parameters using different time/frequency resolutions

An apparatus for encoding directional audio coding parameters comprising diffuseness parameters and direction parameters having a parameter calculator () for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor () for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.

Apparatus and method for encoding or decoding directional audio coding parameters using quantization and entropy coding

An apparatus for generating a description of a combined audio scene, includes: an input interface for receiving a first description of a first scene in a first format and a second description of a second scene in a second format, wherein the second format is different from the first format; a format converter for converting the first description into a common format and for converting the second description into the common format, when the second format is different from the common format; and a format combiner for combining the first description in the common format and the second description in the common format to obtain the combined audio scene.

Apparatus, method and computer program for encoding, decoding, scene processing and other procedures related to DirAC based spatial audio coding

An apparatus decodes an encoded audio signal. The apparatus includes a spectral domain audio decoder that generates a decoded representation of a set of spectral portions, the decoded representation being spectral prediction residual values. A frequency regenerator generates a reconstructed spectral portion using a portion of the same set spectral portions. The reconstructed spectral portion also includes spectral prediction residual values. An inverse prediction filter is configured using prediction filter information included in the encoded audio signal and performs an inverse prediction over frequency using the spectral prediction residual values.

Apparatus and method for encoding and decoding an encoded audio signal using temporal noise/patch shaping

An apparatus for providing a processed audio signal representation on the basis of input audio signal representation configured to apply an un-windowing, in order to provide the processed audio signal representation on the basis of the input audio signal representation. The apparatus is configured to adapt the un-windowing in dependence on one or more signal characteristics and/or in dependence on one or more processing parameters used for a provision of the input audio signal representation.

Apparatus and audio signal processor, for providing processed audio signal representation, audio decoder, methods and computer programs

There are disclosed several examples of encoding and decoding technique. In particular, an audio synthesizer for generating a synthesis signal from a downmix signal includes:

Parameter encoding and decoding

Apparatus and audio signal processor, for providing processed audio signal representation, audio decoder, audio encoder, methods and computer programs

Growing community of inventors

Nuremberg, Germany

Stefan Bayer