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

Technische Universitaet Ilmenau

Technische Universitat Ilmenau

Alexander Adami

Jürgen Herre

Sascha Disch

Juergen Herre

Florin Ghido

Achim Kuntz

Fabian Kuech

Johannes Hilpert

Jan Plogsties

Andreas Hoelzer

Christian Ertel

Michael Kratschmer

Emanuel Habets

Adrian Murtaza

Sascha Dick

Fabian Küch

Christian Borss

Andreas Silzle

Hanne Stenzel

Franz Reutelhuber

Simone Neukam

Sebastian Schlecht

Giovanni Del Galdo

Simone Fueg

Andreas Hölzer

Frank Wefers

Carlotta Anemüller

Matthias Geier

Jurgen Herre

Fabian Kuch

Simone FÜG

Simon Schwär

Mikhail Korotiaev

Yun-Han Wu

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

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 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

Audio encoder for encoding audio input data to obtain audio output data includes an input interface for receiving a plurality of audio channels, a plurality of audio objects and metadata related to one or more of the plurality of audio objects; a mixer for mixing the plurality of objects and the plurality of channels to obtain a plurality of pre-mixed channels, each pre-mixed channel including audio data of a channel and audio data of at least one object; a core encoder for core encoding core encoder input data; and a metadata compressor for compressing the metadata related to the one or more of the plurality of audio objects, wherein the audio encoder is configured to operate in at least one mode of the group of two modes.

Concept for audio encoding and decoding for audio channels and audio objects

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

An apparatus for decomposing an audio signal into a background component signal and a foreground component signal includes: a block generator for generating a time sequence of blocks of audio signal values; an audio signal analyzer for determining a block characteristic of a current block of the audio signal and for determining an average characteristic for a group of blocks, the group of blocks including at least two blocks; and a separator for separating the current block into a background portion and a foreground portion in response to a ratio of the block characteristic of the current block and the average characteristic of the group of blocks, wherein the background component signal includes the background portion of the current block and the foreground component signal includes the foreground portion of the current block.

Apparatus and method for decomposing an audio signal using a ratio as a separation characteristic

An audio post-processor for post-processing an audio signal having a time-variable high frequency gain information as side information includes: a band extractor for extracting a high frequency band of the audio signal and a low frequency band of the audio signal; a high band processor for performing a time-variable modification of the high frequency band in accordance with the time-variable high frequency gain information to obtain a processed high frequency band; and a combiner for combining the processed high frequency band and the low frequency band. Furthermore, a pre-processor is illustrated.

Post-processor, pre-processor, audio encoder, audio decoder and related methods for enhancing transient processing

An audio signal processing device for downmixing of a first input signal and a second input signal to a downmix signal having:

Concept for generating a downmix signal

Apparatus for adapting a spatial audio signal for an original loudspeaker setup to a playback loudspeaker setup that differs from the original loudspeaker setup. The apparatus includes a direct-ambience decomposer that is configured to decomposing channel signals in a segment of the original loudspeaker setup into direct sound and ambience components, and to determine a direction of arrival of the direct sound components. A direct sound renderer receives a playback loudspeaker setup information and adjusts the direct sound components using the playback loudspeaker setup information so that a perceived direction of arrival of the direct sound components in the playback loudspeaker setup is substantially identical to the direction of arrival of the direct sound components. A combiner combines adjusted direct sound components and possibly modified ambience components to obtain loudspeaker signals for loudspeakers of the playback loudspeaker setup.

Segment-wise adjustment of spatial audio signal to different playback loudspeaker setup

Growing community of inventors

Gundelsheim, Germany

Alexander Adami