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US 2013/0259254 A1Published application
Systems, methods, and apparatus for producing a directional sound field
AssigneeQUALCOMM Incorporated
InventorsPei Xiang, Lae-Hoon Kim, Erik Visser
Life of this patent
Estimating the term…
Abstract
A system may be used to drive an array of loudspeakers to produce a sound field that includes a source component, whose energy is concentrated along a first direction relative to the array, and a masking component that is based on an estimated intensity of the source component in a second direction that is different from the first direction.
Claims55
A method of signal processing, said method comprising:
- determining a frequency profile of a source signal;
- based on said frequency profile of the source signal, producing a masking signal according to a masking frequency profile, wherein the masking frequency profile is different than the frequency profile of the source signal;
- and
- producing a sound field comprising (A) a source component that is based on the source signal and (B) a masking component that is based on the masking signal.
1 more element
An apparatus for producing a sound field, said apparatus comprising:
- means for determining a frequency profile of a source signal;
- means for producing a masking signal, based on said frequency profile of the source signal, according to a masking frequency profile, wherein the masking frequency profile is different than the frequency profile of the source signal;
- and
- means for producing the sound field comprising (A) a source component that is based on the source signal and (B) a masking component that is based on the masking signal.
1 more element
An apparatus for producing a sound field, said apparatus comprising:
- a signal analyzer configured to determine a frequency profile of a source signal;
- a signal generator configured to produce a masking signal, based on said frequency profile of the source signal, according to a masking frequency profile, wherein the masking frequency profile is different than the frequency profile of the source signal;
- and
- an audio output stage configured to drive an array of loudspeakers to produce the sound field, wherein the sound field comprises (A) a source component that is based on the source signal and (B) a masking component that is based on the masking signal.
1 more element
A non-transitory computer-readable data storage medium having tangible features that cause a machine reading the features to:
- determine a frequency profile of a source signal;
- produce, based on said frequency profile of the source signal, a masking signal according to a masking frequency profile, wherein the masking frequency profile is different than the frequency profile of the source signal;
- and
- produce a sound field comprising (A) a source component that is based on the source signal and (B) a masking component that is based on the masking signal.
1 more element
A method of signal processing, said method comprising:
- producing a multichannel source signal that is based on a source signal;
- producing a masking signal that is based on a noise signal;
- and
- driving a first directionally controllable transducer, in response to the multichannel source and masking signals, to produce a sound field comprising (A) a source component that is based on the multichannel source signal and (B) a masking component that is based on the masking signal,
- wherein said producing the masking signal is based on information from a recording of a second sound field produced by a second directionally controllable transducer.
2 more elements
An apparatus for signal processing, said apparatus comprising:
- means for producing a multichannel source signal that is based on a source signal;
- means for producing a masking signal that is based on a noise signal;
- and
- means for driving a first directionally controllable transducer, in response to the multichannel source and masking signals, to produce the sound field comprising (A) a source component that is based on the multichannel source signal and (B) a masking component that is based on the masking signal,
- wherein said producing the masking signal is based on information from a recording of a second sound field produced by a second directionally controllable transducer.
2 more elements
An apparatus for signal processing, said apparatus comprising:
- a first spatially directive filter configured to produce a multichannel source signal that is based on a source signal;
- a second spatially directive filter configured to produce a masking signal that is based on a noise signal;
- and
- an audio output stage configured to drive a first directionally controllable transducer, in response to multichannel source and masking signals, to produce a sound field comprising (A) a source component that is based on the multichannel source signal and (B) a masking component that is based on the masking signal,
- wherein said producing the masking signal is based on information from a recording of a second sound field produced by a second directionally controllable transducer.
2 more elements
A non-transitory computer-readable data storage medium having tangible features that cause a machine reading the features to:
- produce a multichannel source signal that is based on a source signal;
- produce a masking signal that is based on a noise signal;
- and
- drive a first directionally controllable transducer, in response to the multichannel source and masking signals, to produce a sound field comprising (A) a source component that is based on the multichannel source signal and (B) a masking component that is based on the masking signal.
1 more element
Dependencies are inferred from the claim text.