SYSTEMS, METHODS, DEVICES, APPARATUS, AND COMPUTER PROGRAM PRODUCTS FOR AUDIO EQUALIZATION
First Claim
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1. A method of processing a reproduced audio signal, said method comprising performing each of the following acts within a device that is configured to process audio signals:
- based on information from a noise estimate, boosting an amplitude of at least one frequency subband of the reproduced audio signal relative to an amplitude of at least one other frequency subband of the reproduced audio signal to produce an equalized audio signal; and
using a loudspeaker that is directed at an ear canal of the user to produce an acoustic signal that is based on the equalized audio signal,wherein said noise estimate is based on information from an acoustic error signal produced by an error microphone that is directed at the ear canal of the user.
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Abstract
Methods and apparatus for generating an anti-noise signal and equalizing a reproduced audio signal (e.g., a far-end telephone signal) are described, wherein the generating and the equalizing are both based on information from an acoustic error signal.
218 Citations
50 Claims
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1. A method of processing a reproduced audio signal, said method comprising performing each of the following acts within a device that is configured to process audio signals:
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based on information from a noise estimate, boosting an amplitude of at least one frequency subband of the reproduced audio signal relative to an amplitude of at least one other frequency subband of the reproduced audio signal to produce an equalized audio signal; and using a loudspeaker that is directed at an ear canal of the user to produce an acoustic signal that is based on the equalized audio signal, wherein said noise estimate is based on information from an acoustic error signal produced by an error microphone that is directed at the ear canal of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of processing a reproduced audio signal, said method comprising performing each of the following acts within a device that is configured to process audio signals:
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calculating an estimate of a near-end speech signal emitted at a mouth of a user of the device; performing a feedback cancellation operation, based on information from the near-end speech estimate, on information from a signal produced by a first microphone that is located at a lateral side of the head of the user to produce a noise estimate; based on information from the noise estimate, boosting an amplitude of at least one frequency subband of the reproduced audio signal relative to an amplitude of at least one other frequency subband of the reproduced audio signal to produce an equalized audio signal; and using a loudspeaker that is directed at an ear canal of the user to produce an acoustic signal that is based on the equalized audio signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An apparatus for processing a reproduced audio signal, said apparatus comprising:
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means for producing a noise estimate based on information from an acoustic error signal; means for boosting an amplitude of at least one frequency subband of the reproduced audio signal relative to an amplitude of at least one other frequency subband of the reproduced audio signal, based on information from the noise estimate, to produce an equalized audio signal; and a loudspeaker that is directed at an ear canal of the user during a use of the apparatus to produce an acoustic signal that is based on the equalized audio signal, wherein said acoustic error signal is produced by an error microphone that is directed at the ear canal of the user during the use of the apparatus. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An apparatus for processing a reproduced audio signal, said apparatus comprising:
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an echo canceller configured to produce a noise estimate that is based on information from an acoustic error signal; a subband filter array configured to boost an amplitude of at least one frequency subband of the reproduced audio signal relative to an amplitude of at least one other frequency subband of the reproduced audio signal, based on information from the noise estimate, to produce an equalized audio signal; and a loudspeaker that is directed at an ear canal of the user during a use of the apparatus to produce an acoustic signal that is based on the equalized audio signal, wherein said acoustic error signal is produced by an error microphone that is directed at the ear canal of the user during the use of the apparatus. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A non-transitory computer-readable storage medium having tangible features that cause a machine reading the features to:
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boost an amplitude of at least one frequency subband of a reproduced audio signal relative to an amplitude of at least one other frequency subband of the reproduced audio signal, based on information from a noise estimate, to produce an equalized audio signal; and drive a loudspeaker that is directed at an ear canal of the user to produce an acoustic signal that is based on the equalized audio signal, wherein said noise estimate is based on information from an acoustic error signal produced by an error microphone that is directed at the ear canal of the user. - View Dependent Claims (47, 48, 49, 50)
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Specification