Increasing integrity of watermarks using robust features
First Claim
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1. A method of embedding a watermark pattern (W) with a payload (P) in a time dependent information signal (X), comprising the steps of:
- determining a number of robust signatures (S), each signature (S) being a set of robust features in said information signal (X), said robust signatures being determined in a predetermined time interval of said information signal,creating the payload (P) being dependent of at least one of said number of robust signatures (S) and a predefined message (M),embedding said watermark pattern (W) according to said payload (P) in said information signal (X).
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Abstract
This invention relates to a method of embedding a watermark pattern with a payload in a time dependent information signal, comprising the steps of determining a number of robust signatures in the information signal, creating the payload being dependent of at least one of the number of robust signatures and a predefined message, embedding the watermark pattern according to the payload in the information signal. The invention also relates to a corresponding method and arrangement for detecting a watermark pattern in an information signal.
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Citations
20 Claims
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1. A method of embedding a watermark pattern (W) with a payload (P) in a time dependent information signal (X), comprising the steps of:
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determining a number of robust signatures (S), each signature (S) being a set of robust features in said information signal (X), said robust signatures being determined in a predetermined time interval of said information signal, creating the payload (P) being dependent of at least one of said number of robust signatures (S) and a predefined message (M), embedding said watermark pattern (W) according to said payload (P) in said information signal (X). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of detecting a message (M) in a time dependent information signal (Y) with an embedded watermark pattern (W), said method comprising the steps of:
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detecting the watermark pattern (W) in said information signal (Y) and detecting the payload (P), determining a number of robust signatures, each signature (S) being a set of robust features in said information signal (Y), said robust signatures being determined in a predetermined time interval of said information signal (Y), decoding said message (M) from said payload (P) using at least one of said number of robust signatures. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An arrangement for embedding a watermark pattern (W) with a payload (P) in a time dependent information signal (X), comprising:
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means for determining a number of robust signatures (S), each signature (S) being a set of robust features in said information signal (X), said robust signatures being determined in a predetermined time interval of said information signal, means for creating the payload (P) being dependent of at least one of said number of robust signatures (S) and a predefined message (M), means for embedding said watermark pattern (W) according to said payload (P) in said information signal (X).
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16. An arrangement for detecting a message (M) in a time dependent information signal (Y) with an embedded watermark pattern (W), comprising:
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means for detecting the watermark pattern (W) in said information signal (Y) and detecting the payload (P), means for determining a number of robust signatures, each signature (S) being a set of robust features in said information signal (Y), said robust signatures being determined in a predetermined time interval of said information signal (Y), means for decoding said message (M) from said payload (P) using at least one of said number of robust signatures. - View Dependent Claims (17)
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18. A device for transmitting an information signal, the device comprising an arrangement for embedding a watermark pattern (W) with a payload (P) in a time dependent information signal (X), comprising:
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means for determining a number of robust signatures (S), each signature (S) being a set of robust features in said information signal (X), said robust signatures being determined in a predetermined time interval of said information signal, means for creating the payload (P) being dependent of at least one of said number of robust signatures (S) and a predefined message (M), means for embedding said watermark pattern (W) according to said payload (P) in said information signal (X).
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- 19. A computer readable medium including information signal (Y) with an embedded watermark pattern (W) and a payload (P), said payload (P) being dependent of at least one of a number of robust signatures in said information signal (Y) and a predefined message (M).
Specification