Watermark-based personal audio appliance
First Claim
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1. A device comprising a housing sized for carrying in a user'"'"'s pocket and including:
- a transducer to receive ambient audio and to output electrical signals corresponding thereto;
a watermark detector coupled to the transducer for producing payload information by extracting a digital watermark embedded in the electrical signals corresponding to the ambient audio;
a memory storing user identification information; and
an interface that receives at least some of both the payload information and the user identification information for transmission to a relay station.
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Abstract
A portable device uses a microphone to listen to ambient audio, decodes a watermark signal therein, and uses the decoded data to request delivery of the audio or related information to the user'"'"'s home or other location. The device is desirably pocket-sized, or suitable for carrying on a key-ring. The device may also detect a second watermark signal that is present in the user'"'"'s environment (e.g., played through a public address speaker system) to aid the user in recalling the context from which the audio was requested.
168 Citations
8 Claims
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1. A device comprising a housing sized for carrying in a user'"'"'s pocket and including:
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a transducer to receive ambient audio and to output electrical signals corresponding thereto;
a watermark detector coupled to the transducer for producing payload information by extracting a digital watermark embedded in the electrical signals corresponding to the ambient audio;
a memory storing user identification information; and
an interface that receives at least some of both the payload information and the user identification information for transmission to a relay station. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a method of steganographically encoding audio with a plural-bit binary watermark payload, an improvement wherein the watermark payload comprises a Digital Object Identifier.
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8. A method comprising generating a noise-like signal having a plural-bit location identifier encoded therein, and airing said signal through at least one loudspeaker in an environment, said aired signal being generally indiscernible by human listeners present in said environment.
Specification