Method and apparatus for audio signal enhancement
AssigneeMotorola Mobility LLC
InventorRobert Zurek
Life of this patent
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Abstract
A method for audio signal enhancement comprising obtaining (222) a first audio signal from a first physical microphone element and obtaining a second audio signal from a second physical microphone element. The audio signals are array processed (226) to generate a virtual linear first order element and a virtual non-linear even order element. The array processing (226) includes combining the virtual linear first order element and the virtual non-linear even order element to generate a directional audio signal having a primary audio beam. An apparatus is disclosed for implementing the method.
Claims23
A method for audio signal enhancement, the method comprising:
- obtaining a first audio signal from a first physical microphone element;
- obtaining a second audio signal from a second physical microphone element oriented differently than the first physical microphone element;
- array processing the first audio signal and the second audio signal to generate a virtual linear first order element;
- array processing the first audio signal and the second audio signal to generate a virtual non-linear even order element;
- and
- combining the virtual linear first order element and the virtual non-linear even order element to generate a directional audio signal having a primary audio beam.
An apparatus for audio signal enhancement, comprising:
- a first physical microphone element that is a first order directional element;
- a second physical microphone element;
- a first divider for scaling an audio signal from the first physical microphone element by a scaling factor to produce a first scaled audio signal;
- a second divider for scaling an audio signal from the second physical microphone element by the scaling factor to produce a second scaled audio signal;
- a processor for array processing the first scaled audio signal and the second scaled audio signal to generate a virtual linear first order element and a virtual non-linear even order element, and combining the virtual linear first order element and the virtual non-linear even order element to generate a directional audio signal comprising a primary audio beam;
- a multiplier for multiplying the directional audio signal by the scaling factor.
Dependencies are inferred from the claim text.