Sound wave field generation based on loudspeaker-room-microphone constraints
First Claim
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1. A loudspeaker-room-microphone system comprising:
- one group of loudspeakers including at least one loudspeaker in a room;
one group of microphones including at least one microphone in the room;
a filter having a controllable transfer function;
a filter controller configured to control the transfer function of the filter according to an adaptive control algorithm based on an error signal that is generated from the at least one microphone and a source input signal from an audio source; and
a gain control filter configured to weight the error signal from the at least one microphone according to a position of the group of microphones in the room to provide a modified error signal to the filter controller;
wherein the filter controller is further configured to control the filter based on a spatial constraint;
wherein the filter is configured to provide a loudspeaker signal to the at least one loudspeaker in the room; and
wherein the gain control filter has a frequency-dependent gain such that a spectral composition of the error signal is modified.
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Abstract
A system and method include filtering with controllable transfer functions in signal paths upstream of K≥1 output paths and downstream of Q≥1 source input paths, and controlling with filter control signals of the controllable transfer functions according to an adaptive control algorithm based on error signals on M≥1 error input paths and source input signals on the Q source input paths. The system and method further include at least one loudspeaker-room-microphone constraint.
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Citations
8 Claims
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1. A loudspeaker-room-microphone system comprising:
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one group of loudspeakers including at least one loudspeaker in a room; one group of microphones including at least one microphone in the room; a filter having a controllable transfer function; a filter controller configured to control the transfer function of the filter according to an adaptive control algorithm based on an error signal that is generated from the at least one microphone and a source input signal from an audio source; and a gain control filter configured to weight the error signal from the at least one microphone according to a position of the group of microphones in the room to provide a modified error signal to the filter controller; wherein the filter controller is further configured to control the filter based on a spatial constraint; wherein the filter is configured to provide a loudspeaker signal to the at least one loudspeaker in the room; and wherein the gain control filter has a frequency-dependent gain such that a spectral composition of the error signal is modified. - View Dependent Claims (2, 3, 4)
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5. A loudspeaker-room-microphone system comprising:
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a filter having a controllable transfer function; and a filter controller being configured to control the transfer function of the filter according to an adaptive control algorithm which is based on an error signal that is generated from at least one microphone and on a source input signal from an audio source; and a gain control filter that is configured to weight the error signal from the at least one microphone according to a position of a group of microphones in a room to provide a modified error signal to the filter controller; wherein the filter controller is further configured to control the filter based on a spatial constraint; and wherein the gain control filter has a frequency-dependent gain such that a spectral composition of the error signal is modified. - View Dependent Claims (6, 7, 8)
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Specification