METHOD AND APPARATUS FOR REDUCING THE EFFECT OF ENVIRONMENTAL NOISE ON LISTENERS
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for enhancing a desired audio signal for delivery through an electroacoustic channel include obtaining a noise estimate attributable to an external disturbance, applying the noise estimate to a dynamic noise compensation (DNC) process to thereby condition the desired audio signal as a function of the spectral characteristics of the noise estimate, applying the noise estimate to an adaptive equalization (AEQ) process to thereby condition the desired audio signal as a function of the electroacoustic response of the electroacoustic channel, and applying the noise estimate to an active noise cancellation (ANC) process configured to generate anti-noise for delivery into the electroacoustic channel.
75 Citations
50 Claims
-
1-30. -30. (canceled)
-
31. A method for enhancing a desired audio signal for delivery through an electroacoustic channel, comprising:
-
obtaining a noise estimate attributable to an external disturbance; applying the noise estimate to a dynamic noise compensation (DNC) process to thereby condition the desired audio signal as a function of the spectral characteristics of the noise estimate; and applying the noise estimate to an adaptive equalization (AEQ) process to thereby condition the desired audio signal as a function of the electroacoustic response of the electroacoustic channel. - View Dependent Claims (32, 33, 34, 35)
-
-
36. A method for enhancing a desired audio signal for delivery through an electroacoustic channel using a driver, the method comprising:
-
obtaining a noise estimate based on an external disturbance; generating a dynamic noise compensation (DNC)-conditioned signal by conditioning the desired audio signal as a function of the spectral characteristics of the noise estimate; generating an anti-noise signal using the noise estimate; generating a composite signal from the DNC-conditioned signal and the anti-noise signal; and driving the driver using the composite signal. - View Dependent Claims (37, 38, 39)
-
-
40. A method for enhancing a desired audio signal for delivery through an electroacoustic channel using a driver in the presence of a noise disturbance, the method comprising:
-
obtaining a first noise estimate based on the external disturbance; obtaining a second noise estimate based on the external disturbance; generating a DNC-conditioned signal by conditioning the desired audio signal as a function of the spectral characteristics of the first noise estimate; generating an anti-noise signal using the first and second noise estimates; generating a composite signal from the DNC-conditioned signal and the anti-noise signal; and driving the driver using the composite signal, wherein the first noise estimate contains an anti-noise component but no DNC-conditioned component. - View Dependent Claims (41, 42, 43)
-
-
44. An audio enhancement system for enhancing a desired audio signal, comprising:
-
a dynamic noise compensation (DNC) module configured to generate a DNC-conditioned signal, the DNC module including a spectral shaping filter operable to apply spectral shaping to the desired audio signal based on spectral characteristics of a first noise estimate; and an adaptive equalization (AEQ) module configured to generate an AEQ-conditioned signal, the AEQ module including an adaptive equalization control filter operable to receive the DNC-conditioned signal and apply thereto adaptive equalization as a function of the first noise estimate. - View Dependent Claims (45, 46, 47)
-
-
48. An audio enhancement system for enhancing a desired audio signal for delivery through an electroacoustic channel, comprising:
-
a dynamic noise compensation (DNC) module configured to generate a DNC-conditioned signal, the DNC module including a spectral shaping filter operable to apply spectral shaping to the desired audio signal based on spectral characteristics of a first noise estimate; an active noise cancellation (ANC) module including a control filter having filter characteristics updatable by the first noise estimate and having a first input for receiving a second noise estimate and generating therefrom an anti-noise signal; and a first combiner for combining the DNC-conditioned signal and the anti-noise signal to generate a composite signal. - View Dependent Claims (49, 50)
-
Specification