US 9,813,804 B2
Device and method for spatially selective audio reproduction
Andreas Franck, Illmenau (DE); Christoph Sladeczek, Illmenau (DE); and Thomas Sporer, Fuerth (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed on Nov. 30, 2015, as Appl. No. 14/954,913.
Application 14/954,913 is a continuation of application No. PCT/EP2014/061188, filed on May 28, 2014.
Claims priority of application No. 10 2013 210 184 (DE), filed on May 31, 2013; and application No. 10 2013 217 367 (DE), filed on Aug. 30, 2013.
Prior Publication US 2016/0088388 A1, Mar. 24, 2016
Int. Cl. H04R 5/02 (2006.01); H04R 1/32 (2006.01); H04R 27/00 (2006.01)
CPC H04R 1/323 (2013.01) [H04R 5/02 (2013.01); H04R 27/00 (2013.01); H04R 2203/12 (2013.01); H04R 2227/001 (2013.01); H04R 2430/01 (2013.01); H04R 2430/20 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for spatially selective audio reproduction, comprising
an input for a first audio signal and a second audio signal;
an output for a plurality of loudspeakers;
a beamforming processor connected between the input, on the one hand, and the output, on the other hand, and configured to emit the first audio signal and the second audio signal for spatially selective reproduction to the loudspeakers via the output;
a calculator configured to calculate, by means of a propagation model, for each of the first audio signal and the second audio signal a respective version of the respective audio signal which results from the spatially selective reproduction in a first region of a sonication area of the loudspeakers;
a masking threshold calculator configured to calculate, via a psychoacoustic model, a masking threshold as a function of the version of the first audio signal; and
an adaptor configured to influence, as a function of a comparison of the masking threshold with the version of the second audio signal, the emission of the first audio signal and the second audio signal for spatially selective reproduction to the loudspeakers via the output;
the beamforming processor being configured to achieve emission of the first audio signal and the second audio signal for spatially selective reproduction to the output by performing beamforming on at least the second audio signal, the beamforming processor comprising several modes for performing beamforming which differ from one another with regard to an amount of suppression of the second audio signal at the first region for different frequency domains,
the adaptor being configured to vary the beamforming by switching from a currently used mode to a different mode as a function of the comparison.