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US 2007/0165851 A1Published application
Watermark detection
AssigneeKoninklijke Philips Electronics N.V.
InventorDavid Roberts
Life of this patent
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AssigneeKoninklijke Philips Electronics N.V.
InventorDavid Roberts
Estimating the term…
An information signal includes a plurality of watermarks (Wi) which together define a payload of data, such as a rights information. A detector (100) detects the presence (60-62) of each of the plurality of watermarks in the information signal and provides an output (101-103) which can be used to determine (70, 75) the payload represented by the watermarks. A measure of confidence in the accuracy of the payload represented by the watermarks is calculated (110) using information (104-106) from the detection stages (60-62). This provides a measure of the quality of the payload to any equipment which relies on the payload results, such as a Digital Rights Management (DRM) system. Information about the shape of correlation peaks obtained in the detection stages (60-62) can be used to derive the measure of confidence in the accuracy of the payload.
A method of processing an information signal in which a plurality of watermarks (Wi) are present, the plurality of watermarks together defining a payload, the method comprising:
(canceled)
An arrangement for processing an information signal in which a plurality of watermarks (Wi) are present, the plurality of watermarks together defining a payload, the arrangement comprising:
(canceled)
An arrangement for processing an information signal in which a plurality of watermarks (Wi) are present, the plurality of watermarks together defining a payload, the arrangement comprising:
Dependencies are inferred from the claim text.