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

Coding Technologies Ab

Koninklijke Philips Corporation N.v.

M2any Gmbh

Sony Corporation

Agere Systems Inc.

Gracenote, Inc.

Dolby International Ab

Koninklijke Philips Electronics N.v.

Technische Universitat Ilmenau

Jürgen Herre

Sascha Disch

Stefan Bayer

Markus Multrus

Guillaume Fuchs

Wolfgang Jaegers

Johannes Hilpert

Heiko Purnhagen

Bernhard Grill

Jonas Engdegard

Lars Villemoes

Kristofer Kjoerling

Christian Helmrich

Ralf Geiger

Nikolaus Rettelbach

Max Neuendorf

Markus Schnell

Jérémie Lecomte

Frederik Nagel

Bernd Edler

Martin Dietz

Emmanuel Ravelli

Florin Ghido

Christof Faller

Oliver Hellmuth

Ernst Eberlein

Christian Uhle

Stefan Geyersberger

Matthias Neusinger

Goran Markovic

Gerald Schuller

Achim Kuntz

Harald Fuchs

Ralph Sperschneider

Harald Popp

Juha Vilkamo

Jan Plogsties

Leon Terentiv

Andreas Hoelzer

Oliver Thiergart

Karlheinz Brandenburg

Emanuel Habets

Kristofer Kjörling

Sascha Dick

Eleni Fotopoulou

Fabian Kuech

Christian Ertel

Thomas Sporer

Stefan Wabnik

Michael Kratschmer

Jouni Paulus

Giovanni Del Galdo

Fabian Küch

Adrian Murtaza

Falko Ridderbusch

Christian Borss

Tom Baeckstroem

Alexandre Bouthéon

Karsten Linzmeier

Bernhard Neugebauer

Stefan Döhla

Andreas Walther

Jens Hirschfeld

Christian Griebel

Markus Schmidt

Franz Reutelhuber

Simone Neukam

Dieter Seitzer

Cornelia Falch

Alexander Adami

Jeroen Dirk Breebaart

Thorsten Kastner

Srikanth Korse

Wolfgang Hess

Jan Büthe

Oliver Wübbolt

Julian Klapp

Erik Schuijers

Eric Allamanche

Peter Prokein

Markus Cremer

Heinz Gerhauser

Yoshikazu Yokotani

Markus Kallinger

Dirk Mahne

Andreas Silzle

Claus Spenger

Patrick Gampp

Christian Neubauer

Pallavi Maben

Leonid Terentiev

Julia Havenstein

Antonios Karampourniotis

Herbert Buchner

Ralph Kulessa

Frank Siebenhaar

Alexandra Craciun

Christoph Faller

Felix Fleischmann

An apparatus for reproducing a spatially extended sound source having a defined position and geometry in a space includes an interface for receiving a listener position; a projector for calculating a projection of a two-dimensional or three-dimensional hull associated with the spatially extended sound source onto a projection plane using the listener position, information on the geometry of the spatially extended sound source, and information on the position of the spatially extended sound source; a sound position calculator for calculating positions of at least two sound sources for the spatially extended sound source using the projection plane; and a renderer for rendering the at least two sound sources at the positions to obtain a reproduction of the spatially extended sound source having two or more output signals, wherein the renderer is configured to use different sound signals for the different positions.

Apparatus and method for reproducing a spatially extended sound source or apparatus and method for generating a bitstream from a spatially extended sound source

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 processor for providing a plurality of loudspeaker signals, or loudspeaker feeds, on the basis of a plurality of input signals, like channeled signals and/or object signals, is configured to obtain information about the position of a listener, to obtain an information about the position of a plurality of loudspeakers, or sound transducers, which may be placed within the same containment, e.g. a soundbar, to dynamically adapt an allocation of objects and/or channel objects and/or adapted signals, like adapted channel signals, derived from the input signals, like channel signals or channel objects, or like upmixed or downmixed signals, to loudspeakers, and to render the objects and/or the channel objects and/or the adapted signals derived from the input signals, in dependence on the information about the positions of the listener and of the loudspeakers, and on the allocation, in order to obtain the loudspeaker signals, such that a rendered sound follows a listener.

Audio processor and a method for providing loudspeaker signals

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

An apparatus for reproducing a spatially extended sound source having a defined position or orientation and geometry in a space has an interface for receiving a listener position. The apparatus having a projector for calculating a projection of a two- or three-dimensional hull associated with the sound source onto a projection plane using the listener position, information on the geometry of the sound source, and on the position of the sound source; a sound position calculator for calculating positions of at least two sound sources for the spatially extended sound source using the projection plane; and a renderer for rendering the at least two sound sources at the positions to obtain a reproduction of the sound source having two or more output signals, configured to use different sound signals for the different positions.

Apparatus and method for reproducing a spatially extended sound source or apparatus and method for generating a description for a spatially extended sound source using anchoring information

An apparatus for encoding a spatial audio representation representing an audio scene to obtain an encoded audio signal includes: a transport representation generator for generating a transport representation from the spatial audio representation, and for generating transport metadata related to the generation of the transport representation or indicating one or more directional properties of the transport representation; and an output interface for generating the encoded audio signal, the encoded audio signal including information on the transport representation, and information on the transport metadata.

Apparatus and method for encoding a spatial audio representation or apparatus and method for decoding an encoded audio signal using transport metadata and related computer programs

An apparatus for synthesizing a spatially extended sound source includes: a spatial information interface for receiving a spatial range indication indicating a limited spatial range for the spatially extended sound source within a maximum spatial range; a cue information provider for providing one or more cue information items in response to the limited spatial range; and an audio processor for processing an audio signal representing the spatially extended sound source using the one or more cue information items.

Apparatus and method for synthesizing a spatially extended sound source using cue information items

An audio analyzer configured to obtain spectral domain representations of two or more input audio signals. Additionally the audio analyzer is configured to obtain directional information associated with spectral bands of the spectral domain representations and to obtain loudness information associated with different directions as an analysis result. Contributions to the loudness information are determined in dependence on the directional information.

Directional loudness map based audio processing

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

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:

An apparatus for decomposing an audio signal into a background component signal and a foreground component signal, has: a block generator for generating a time sequence of blocks of audio signal values; an audio signal analyzer for determining a characteristic of a current block of the audio signal and for determining a variability of the characteristic within a group of blocks having at least two blocks of the sequence of blocks; and a separator for separating the current block into a background portion and a foreground portion wherein the separator is configured to determine a separation threshold based on the variability and to separate the current block into the background component signal and the foreground component signal, when the characteristic of the current block is in a predetermined relation to the separation threshold.

Apparatus and method for decomposing an audio signal using a variable threshold

Growing community of inventors

Buckenhof, Germany

Jürgen Herre