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

Dirk Mahne

Oliver Thiergart

Emanuel Habets

Achim Kuntz

Fabian Kuech

Fabian Küch

Markus Kallinger

Richard Schultz-Amling

Alexander Niederleitner

Anthony Lombard

Edwin Mabande

Affan-Hasan Khan

Mikko-Ville Laitinen

Fabian Kuch

Juergen Herre

Jürgen Herre

Giovanni Del Galdo

Bernhard Birzer

Ville Topias Pulkki

Paolo Annibale

Michael Kratschmer

Mikko-ville Laitinen

Alexandre Bouthéon

Maria Luis Valero

Alexandra Craciun

Axel Plinge

Moritz Wild

Jurgen Herre

Apparatus for processing a sound field representation related to a defined reference point or defined listening orientation for the sound field representation including: a sound field processor for processing the sound field representation using a deviation of a target listening position from the defined reference point or a target listening orientation from the defined listening orientation to obtain a processed sound field description which, when rendered, provides an impression of the sound field representation at the target listening position being different from the defined reference point or for the target listening orientation being different from the defined listening orientation, or for processing the sound field representation using a spatial filter to obtain the processed sound field description which, when rendered, provides an impression of a spatially filtered sound field description, the sound field processor being configured to process the sound field representation to apply the deviation or the spatial filter in a spatial transform domain with an associated forward transform rule and backward transform rule.

Apparatus, method or computer program for processing a sound field representation in a spatial transform domain

An apparatus for processing an audio signal includes an audio signal analyzer and a filter. The audio signal analyzer is configured to analyze an audio signal to determine a plurality of noise suppression filter values for a plurality of bands of the audio signal, wherein the analyzer is configured to determine a noise suppression filter value so that a noise suppression filter value is greater than or equal to a minimum noise suppression filter value and so that the minimum noise suppression value depends on a characteristic of the audio signal. The filter is configured for filtering the audio signal, wherein the filter is adjusted based on the noise suppression filter values.

Apparatus and method for reducing noise in an audio signal

An apparatus for generating a sound field description having a representation of sound field components, including a direction determiner for determining one or more sound directions for each time-frequency tile of a plurality of time-frequency tiles of a plurality of microphone signals; a spatial basis function evaluator for evaluating, for each time-frequency tile of the plurality of time-frequency tiles, one or more spatial basis functions using the one or more sound directions; and a sound field component calculator for calculating, for each time-frequency tile of the plurality of time-frequency tiles, one or more sound field components corresponding to the one or more spatial basis functions evaluated using the one or more sound directions and a reference signal for a corresponding time-frequency tile, the reference signal being derived from one or more microphone signals of the plurality of microphone signals.

Apparatus, method or computer program for generating a sound field description

Apparatus and method for processing an audio signal using noise suppression filter values

A partitioned block frequency domain adaptive filter device includes a frequency domain adaptive filter configured for filtering a frequency domain representation of a time domain input signal depending on a set of filter coefficients consisting of a plurality of blocks of filter coefficients in order to produce a filtered signal; a plurality of parallel arranged filter update blocks; wherein each of the filter update blocks includes an adaptation module configured for executing an adaptation sequence including the steps of calculating an approximation of a constrained gradient update for the filter coefficients of the respective block of filter coefficients, and calculating a cumulative error introduced on the unconstrained gradient update; wherein each of the filter update blocks includes a correction module configured for executing a correction sequence including the steps of calculating a corrected constrained gradient update for the filter coefficients of the respective block of filter coefficients.

Partitioned block frequency domain adaptive filter device comprising adaptation modules and correction modules

A spatial audio processor for providing spatial parameters based on an acoustic input signal has a signal characteristics determiner and a controllable parameter estimator. The signal characteristics determiner is configured to determine a signal characteristic of the acoustic input signal. The controllable parameter estimator for calculating the spatial parameters for the acoustic input signal in accordance with a variable spatial parameter calculation rule is configured to modify the variable spatial parameter calculation rule in accordance with the determined signal characteristic.

Spatial audio processor and a method for providing spatial parameters based on an acoustic input signal

An apparatus for generating an audio output signal to simulate a recording of a virtual microphone at a configurable virtual position in an environment includes a sound events position estimator and an information computation module. The former is adapted to estimate a sound source position indicating a position of a sound source in the environment, wherein the sound events position estimator is adapted to estimate the sound source position based on first and second direction information provided by first and second real spatial microphones, respectively, located at first and second real microphone positions in the environment, respectively. The information computation module is adapted to generate the audio output signal based on a first recorded audio input signal, on the first real microphone position, on the virtual position of the virtual microphone, and on the sound source position.

Sound acquisition via the extraction of geometrical information from direction of arrival estimates

An apparatus for converting a first parametric spatial audio signal representing a first listening position or a first listening orientation in a spatial audio scene to a second parametric spatial audio signal representing a second listening position or a second listening orientation is described, the apparatus including: a spatial audio signal modification unit adapted to modify the first parametric spatial audio signal dependent on a change of the first listening position or the first listening orientation so as to obtain the second parametric spatial audio signal, wherein the second listening position or the second listening orientation corresponds to the first listening position or the first listening orientation changed by the change.

Apparatus and a method for converting a first parametric spatial audio signal into a second parametric spatial audio signal

An apparatus for resolving an ambiguity from a DOA estimate includes a DOA estimate analyzer for analyzing the DOA estimate to obtain a plurality of ambiguous analysis parameters by using a bias information, the bias information representing a relation between a biased and an unbiased DOA estimate, and an ambiguity resolver for resolving the ambiguity in the plurality of ambiguous analysis parameters to obtain a non-ambiguous resolved parameter.

Apparatus and method for resolving an ambiguity from a direction of arrival estimate

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Nuremberg, Germany

Dirk Mahne