Method and system for digital watermarking
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Abstract
A method for applying a digital watermark to a content signal is disclosed. In accordance with such a method, a watermarking key is identified. The watermarking key includes a binary sequence and information describing application of that binary sequence to the content signal. The digital watermark is then encoded within the content signal at one or more locations determined by the watermarking key.
104 Citations
151 Claims
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1-106. -106. (canceled)
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107. A method for decoding digital watermarks, the method comprising the steps of:
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receiving a content signal imperceptibly encoded with at least one digital watermark; and decoding the at least one digital watermark from the imperceptibly encoded content signal wherein said decoding limits the ability to reverse the encoding. - View Dependent Claims (108, 109, 110, 111, 112, 113, 114)
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115. A method for decoding digital watermarks, the method comprising the steps of:
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receiving a content signal imperceptibly encoded by a watermarking technique with at least one digital watermark; and decoding the at least one digital watermark from the encoded content signal wherein the step of decoding limits tampering of at least one digital watermark. - View Dependent Claims (116, 117, 118, 119, 120, 121, 143)
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122-127. -127. (canceled)
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128. A system for watermarking at least one content signal, the system comprising:
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a digital watermark encoder; and a digital watermark decoder; the digital watermark decoder configured to verify the presence of at least one digital watermark. - View Dependent Claims (129, 130, 131, 132, 133, 134, 135)
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136-142. -142. (canceled)
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144. A device for decoding digital watermarks, the device comprising:
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a receiver for receiving at least one content signal imperceptibly encoded with at least one imperceptible digital watermark; and a decoder for decoding at least one imperceptible digital watermark from the imperceptibly encoded content signal wherein the device limits the ability to reverse the encoding. - View Dependent Claims (145, 146, 147, 148, 149, 150, 151)
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Specification