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Vorrichtung und Verfahren zum Berechnen von Lautsprechersignalen für eine Mehrzahl von Lautsprechern unter Verwendung einer Verzögerung im Frequenzbereich

DEVICE AND METHOD FOR CALCULATING SPEAKER SIGNALS FOR A PLURALITY OF SPEAKERS USING A DELAY IN THE FREQUENCY DOMAIN
 
: Franck, Andreas; Rath, Michael; Sladeczek, C.

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Frontpage ()

DE 102012200512 A1: 20120113
German
Patent, Electronic Publication
Fraunhofer IDMT ()

Abstract
The invention relates to a device for calculating speaker signals for a plurality of speakers using a plurality of audio sources, wherein an audio source has an audio signal (10), said device comprising: a forward-transformation stage (100) for transforming each audio signal (10) in stages into a spectral range in order to obtain a plurality of temporally successive short-term spectra for each audio signal; a buffer (200) for storing a number of temporally successive short-term spectra for each audio signal; a buffer access control (600) for accessing a specific short-term spectrum from the plurality of short-term spectra for a combination of a speaker and an audio signal based on a delay value (701); a filter stage (300) for filtering the specific short-term spectrum for the combination of audio signal and speaker with a filter that is provided for the combination of audio signal and speaker such that a filtered short-term spectrum is obtained for each combination of one audio signal and one speaker; a summation stage (400) for adding up the filtered short-term spectra for a speaker in order to obtain the sum of short-term spectra for each speaker; and a back-transformation stage (800) for the back transformation of added short-term spectra in stages for the speaker in a time domain in order to obtain the speaker signals.

: http://publica.fraunhofer.de/documents/N-270911.html