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US 9,437,182 B2Granted
Active noise reduction method using perceptual masking
AssigneeNXP B.V.
InventorSimon Doclo
Life of this patent
Estimating the term…
Abstract
A method of active noise reduction is described which comprises receiving an audio signal (132) to be played, receiving a noise signal (105, 107, 116, 118, 126), indicative of ambient noise (111), from at least one microphone (104, 106), and generating a noise cancellation signal (114) depending on both, said audio signal (132) and said noise signal (105, 107, 116, 118, 126).
Claims15
A method of active noise reduction, the method comprising:
- receiving an audio signal to be played;
- receiving at least one noise signal from at least one microphone, said at least one noise signal being indicative of an ambient noise;
- and
- generating a noise cancellation signal depending on both said audio signal and said at least one noise signal, wherein the noise cancellation signal reduces an intensity of the ambient noise in frequency regions where the ambient noise is not masked by the audio signal.
1 more element
A cancellation signal generator comprising:
- a first input configured to receive an audio signal to be played;
- and
- a second input configured to receive, from at least one microphone, at least one noise signal indicative of an ambient noise, wherein said cancellation signal generator is configured for generating a noise cancellation signal depending on both said audio signal and said at least one noise signal, wherein the noise cancellation signal reduces an intensity of the ambient noise in frequency regions where the ambient noise is not masked by the audio signal.
Dependencies are inferred from the claim text.