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US 2017/0323632 A1Published application
Reverberator and method for reverberating an audio signal
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsBernhard NEUGEBAUER, Jan PLOGSTIES, Juha VILKAMO
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Abstract
A reverberator for reverberating an audio signal includes a feedback delay loop processor for delaying at least two different frequency subband signals representing the audio signal by different loop delays to obtain reverberated frequency subband signals.
Claims17
Reverberator for reverberating an audio signal, comprising:
- a feedback delay loop processor for delaying at least two different frequency subband signals comprising a first frequency subband signal being a first time-frequency tile and a different second frequency subband signal being a second different time-frequency tile, the at least two different frequency subband signals representing the audio signal by different loop delay amounts to acquire at least two reverberated frequency subband signals comprising a first reverberated frequency subband signal corresponding to the first time-frequency tile and a different second reverberated frequency subband signal corresponding to the second time-frequency tile,
- wherein the feedback delay loop processor comprises:
- for the first frequency subband signal of the at least two frequency subband signals, a first delay line comprising a first plurality of delay line taps providing first signals delayed by first tap delays, a first feedback loop connected to the first delay line and a first combiner for combining the first signals output by the first plurality of delay line taps to obtain the first reverberated frequency subband signal corresponding to the first time-frequency tile, and
- for the second different frequency subband signal of the at least two frequency subband signals, a second delay line comprising a second plurality of delay line taps providing second signals delayed by second tap delays, a second feedback loop connected to the second delay line and a second combiner for combining the second signals output by the second plurality of delay line taps to obtain the second reverberated frequency subband signal corresponding to the second time-frequency tile,
- wherein the first feedback loop together with the first delay line represent a first loop delay amount and wherein the second feedback loop together with the second delay line represent a second loop delay amount, the second loop delay amount being different from the first loop delay amount.
2 more elements
A method for reverberating an audio signal, comprising:
- delaying at least two different frequency subband signals comprising a first frequency subband signal being a first time-frequency tile and a different second frequency subband signal being a second different time-frequency tile, the at least two different frequency subband signals representing the audio signal. by different loop delay amounts by using a feedback delay loop processor to acquire at least two reverberated frequency subband signals comprising a first reverberated frequency subband signal corresponding to the first time-frequency tile and a different second reverberated frequency subband signal corresponding to the second time-frequency tile,
- wherein the feedback delay loop processor comprises:
- for the first frequency subband signal of the at least two frequency subband signals a first delay line comprising a plurality of delay line taps providing first signals delayed by first tap delays, a first feedback loop connected to the first delay line and a first combiner for combining the first signals output by the plurality of delay line taps to obtain the first reverberated frequency subband signal corresponding to the first time-frequency tile, and
- for the second different frequency subband signal of the at least two frequency subband signals, a second delay line comprising a second plurality of delay line taps providing signals delayed by second tap delays, a second feedback loop connected to the second delay line and a second combiner for combining the second signals output by the second plurality of delay line taps to obtain the second reverberated frequency subband signal corresponding to the second time-frequency tile,
- wherein the first feedback loop together with the first delay line represent a first loop delay amount and wherein the second feedback loop together with the second delay line represent a second loop delay amount, the second loop delay amount being different from the first loop delay amount.
2 more elements
A non-transitory storage medium having stored thereon a computer program comprising a program code for performing, when the computer program is executed on a computer, a method for reverberating an audio signal, the method comprising:
- delaying at least two different frequency subband signals comprising a first frequency subband signal being a first time-frequency tile and a different second frequency subband signal being a second different time-frequency tile, the at least two different frequency subband signals representing the audio signal by different loop delay amounts by using a feedback delay loop processor to acquire at least two reverberated frequency subband signals comprising a first reverberated frequency subband signal corresponding to the first time-frequency tile and a different second reverberated frequency subband signal corresponding to the second time-frequency tile,
- wherein the feedback delay loop processor comprises:
- for the first frequency subband signal of the at least two frequency subband signals a first delay line comprising a first plurality of delay line taps providing first signals delayed by first tap delays, a first feedback loop connected to the delay line and a first combiner for combining the first signals output by the first plurality of delay line taps to obtain the first reverberated frequency subband signal corresponding to the first time-frequency tile, and
- for the second different frequency subband signal of the at least two frequency subband signals, a second delay line comprising a second plurality of delay line taps providing second signals delayed by second tap delays, a second feedback loop connected to the second delay line and a second combiner for combining the second signals output by the second plurality of delay line taps to obtain the second reverberated frequency subband signal corresponding to the second time-frequency tile,
- wherein the first feedback loop together with the first delay line represent a first loop delay amount and wherein the second feedback loop together with the second delay line represent a second loop delay amount, the second loop delay amount being different from the first loop delay amount.
2 more elements
Dependencies are inferred from the claim text.