DEVICE AND METHOD FOR CALCULATING LOUDSPEAKER SIGNALS FOR A PLURALITY OF LOUDSPEAKERS WHILE USING A DELAY IN THE FREQUENCY DOMAIN

摘要

A device for calculating loudspeaker signals using a plurality of audio sources, an audio source including an audio signal, includes a forward transform stage for transforming each audio signal to a spectral domain to obtain a plurality of temporally consecutive short-term spectra, a memory for storing a plurality of temporally consecutive short-term spectra for each audio signal, a memory access controller for accessing a specific short-term spectrum for a combination consisting of a loudspeaker and an audio signal based on a delay value, a filter stage for filtering the specific short-term spectrum by using a filter, so that a filtered short-term spectrum is obtained for each audio signal and loudspeaker combination, a summing stage for summing up the filtered short-term spectra for a loudspeaker to obtain summed-up short-term spectra, and a backtransform stage for backtransforming summed-up short-term spectra for the loudspeakers to a time domain to obtain the loudspeaker signals.

主权项

1. A device for calculating loudspeaker signals for a plurality of loudspeakers while using a plurality of audio sources, an audio source comprising an audio signal, said device comprising:
a forward transform stage for transforming each audio signal, block-by-block, to a spectral domain so as acquire for each audio signal a plurality of temporally consecutive short-term spectra; a memory for storing a plurality of temporally consecutive short-term spectra for each audio signal; a memory access controller for accessing a specific short-term spectrum among the plurality of temporally consecutive short-term spectra for a combination comprising a loudspeaker and an audio signal on the basis of a delay value; a filter stage for filtering the specific short-term spectrum for the combination of the audio signal and the loudspeaker by using a filter provided for the combination of the audio signal and the loudspeaker, so that a filtered short-term spectrum is acquired for each combination of an audio signal and a loudspeaker; a summing stage for summing up the filtered short-term spectra for a loudspeaker so as acquire summed-up short-term spectra for each loudspeaker; and a backtransform stage for backtransforming, block-by-block, summed-up short-term spectra for the loudspeakers to a time domain so as acquire the loudspeaker signals.