Methods for decoding watermark data from audio, and controlling audio devices in accordance therewith
First Claim
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1. A method of processing audio to decode auxiliary control information encoded therein, the audio being represented by primary data, the auxiliary control information being included with plural-bit auxiliary data, the method comprising:
- decoding the auxiliary control information from the primary data; and
controlling an audio device in accordance with the decoded auxiliary control information, wherein the auxiliary control information includes an instruction for controlling use of the audio, and an index to a data enabling additional control of the audio.
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Abstract
Methods for decoding auxiliary control information from audio and using same to control an audio appliance. Various arrangements are disclosed. One method correlates a filtered version of the audio with predetermined noise data to discern plural bits of hidden data. The data thereby extracted is used to trigger some response in the appliance, such as enabling or disabling certain operations.
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Citations
27 Claims
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1. A method of processing audio to decode auxiliary control information encoded therein, the audio being represented by primary data, the auxiliary control information being included with plural-bit auxiliary data, the method comprising:
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decoding the auxiliary control information from the primary data; and
controlling an audio device in accordance with the decoded auxiliary control information, wherein the auxiliary control information includes an instruction for controlling use of the audio, and an index to a data enabling additional control of the audio. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of processing audio to decode plural-bit auxiliary data subliminally encoded therein, the audio being represented by digital data, characterized in that the method comprises:
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providing noise-like data;
processing the audio in accordance with the noise-like data to decode the auxiliary data therefrom; and
disabling or enabling a capability of an audio device in accordance with at least some of the decoded auxiliary data;
wherein the auxiliary control information includes an instruction for controlling use of the audio, and an index to a data enabling additional control of the audio.- View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An audio device responsive to a control signal steganographically embedded in audio information to limit use of the device, the control signal taking the form of a low level broadband noise-like signal that has been combined with the audio information, the noise signal encoding the control signal;
- wherein the control signal includes an instruction for controlling use of the audio, and an index to a data enabling additional control of the audio.
- View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
Specification