Methods and apparatus for audio watermarking
First Claim
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1. A method comprising:
- obtaining, by executing an instruction with a processor, a watermarked noise signal having energy in a first frequency band, the watermarked noise signal being associated with a first operating state of a device;
adjusting, by executing an instruction with the processor, the watermarked noise signal based on an ambient audio level sensed by an audio sensor; and
emitting the adjusted watermarked noise signal via a speaker in response to determining that the device is in the first operating state.
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Abstract
Methods and apparatus for audio watermarking are disclosed. Example methods disclosed herein include obtaining a watermarked noise signal having energy in a first frequency band, the watermarked noise signal being associated with a first operating state of a device. Disclosed example methods also include adjusting the watermarked noise signal based on an ambient audio level sensed by an audio sensor. Disclosed example methods further include emitting the adjusted watermarked noise signal via a speaker in response to determining that the device is in the first operating state.
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Citations
20 Claims
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1. A method comprising:
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obtaining, by executing an instruction with a processor, a watermarked noise signal having energy in a first frequency band, the watermarked noise signal being associated with a first operating state of a device; adjusting, by executing an instruction with the processor, the watermarked noise signal based on an ambient audio level sensed by an audio sensor; and emitting the adjusted watermarked noise signal via a speaker in response to determining that the device is in the first operating state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tangible computer readable storage device or storage disk including computer readable instructions which, when executed, cause a processor to at least:
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obtain a watermarked noise signal having energy in a first frequency band, the watermarked noise signal being associated with a first operating state of a device; adjust the watermarked noise signal based on an ambient audio level sensed by an audio sensor; and cause the adjusted watermarked noise signal to be emitted via a speaker in response to determining that the device is in the first operating state. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus comprising:
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a watermark processor to; obtain a watermarked noise signal having energy in a first frequency band, the watermarked noise signal being associated with a first operating state of a device; and adjust the watermarked noise signal based on an ambient audio level sensed by an audio sensor; and an audio processor to cause the adjusted watermarked noise signal to be emitted via a speaker after the device is determined to be in the first operating state. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification