Controlling operation of a device using a re-configurable watermark detector
First Claim
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1. A method for controlling operation of a device using a watermark comprising:
- decoding a watermark embedded in a signal of a media type, where the watermark includes a command signal used to trigger a change in operation of the watermark detector;
based on the command signal, changing operation of the watermark detector, including changing how the watermark detector decodes or interprets a watermark in a signal of the media type;
after changing operation of the watermark detector, decoding a usage control restriction from a watermark embedded in the signal.
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Abstract
The invention relates to methods, devices and systems for reconfiguring a watermark detector. In many applications, it is useful to be able to change the operation of a watermark detector. Such changes may include changing how the watermark detector decodes or interprets a watermark embedded in a signal of a given media type, such as audio, video or still images.
152 Citations
31 Claims
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1. A method for controlling operation of a device using a watermark comprising:
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decoding a watermark embedded in a signal of a media type, where the watermark includes a command signal used to trigger a change in operation of the watermark detector;
based on the command signal, changing operation of the watermark detector, including changing how the watermark detector decodes or interprets a watermark in a signal of the media type;
after changing operation of the watermark detector, decoding a usage control restriction from a watermark embedded in the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for controlling operation of a device using a watermark detector comprising:
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receiving a media object and a command associated with the media object signaling that the watermark detector requires an upgrade to decode a watermark from the media object;
in response to the command, updating the watermark detector to create an updated watermark detector; and
decoding the watermark from the media object with the updated watermark detector including decoding a usage control restriction from the watermark. - View Dependent Claims (18, 19, 20)
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21. A re-programmable watermark detector comprising:
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a watermark decoder for detecting a command to upgrade the detector; and
detector instructions that are replaceable in response to detecting the command to upgrade the detector, the detector instructions being operable to decode a usage control restriction from a watermark and control playback or recording of a media object carrying the watermark. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A method of an encoding an upgrade trigger in a watermark comprising:
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receiving a media object of a given media type;
encoding a watermark into the media object, where the watermark includes a command signal used to trigger a change in operation of a watermark detector, the change being operable to change how the watermark detector decodes or interprets a watermark in a signal of the media type; and
encoding a usage control restriction into the watermark, wherein the change in the operation of the detector enables the watermark detector to read the usage control restriction. - View Dependent Claims (29, 30, 31)
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Specification