Integrating digital watermarks in multimedia content
First Claim
1. A method for tracking multimedia content with two or more media signals of different media types, comprising:
- receiving the multimedia content, wherein the multimedia content comprises a first watermark embedded in a first of the two or more media signals, the first watermark comprising a first identifier, wherein the first identifier identifies at least the multimedia content, and wherein the first watermark identifier is embedded by a first embedding site; and
embedding a second watermark in a second of the two or more media signals, the second watermark comprising a second identifier, the second identifier uniquely identifying a user or user device, wherein the second watermark identifier is embedded by a second embedding site that is remote from the first embedding site.
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Abstract
A method for tracking media signals in multimedia content is provided by uniquely identifying the multimedia content with a digital watermark identifier. A video channel is preferably embedded with a first watermark identifier. The first identifier uniquely identifies the multimedia content or the content family. A second digital watermark is embedded in an audio channel of the multimedia content. The second digital watermark uniquely identifies a user or user device. When the multimedia content is found in an unauthorized or unexpected channel, the content can be traced back to its misappropriating source via the user identifier.
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Citations
20 Claims
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1. A method for tracking multimedia content with two or more media signals of different media types, comprising:
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receiving the multimedia content, wherein the multimedia content comprises a first watermark embedded in a first of the two or more media signals, the first watermark comprising a first identifier, wherein the first identifier identifies at least the multimedia content, and wherein the first watermark identifier is embedded by a first embedding site; and
embedding a second watermark in a second of the two or more media signals, the second watermark comprising a second identifier, the second identifier uniquely identifying a user or user device, wherein the second watermark identifier is embedded by a second embedding site that is remote from the first embedding site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of resolving distortion of a video signal of multimedia content through analysis of an audio signal of the multimedia content, said method comprising:
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detecting a first digital watermark that has been embedded in a transform domain representation of the audio signal, the first digital watermark including a first calibration component, the first calibration component serving to resolve signal distortion;
using the first calibration component to locate embedded payload information in the video signal, wherein the payload information varies from a first frame to a second frame. - View Dependent Claims (11)
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12. A method of authenticating multimedia content including two or more media signals of different media types, said method comprising:
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receiving the multimedia content, wherein the multimedia content comprises a first watermark embedded in a first of the two or more media signals, the first watermark comprising a first identifier, wherein the first identifier identifies at least the multimedia content, and wherein the first watermark identifier is embedded at a first embedding site, and a second watermark in a second of the two or more media signals, the second watermark comprising a second identifier, the second identifier uniquely identifying a user or user device, wherein the second watermark identifier is embedded at a second embedding site that is remote from the first embedding site;
cross-correlating the first and second identifiers; and
determining whether the multimedia content is authentic based at least in part on the cross-correlating step. - View Dependent Claims (13, 14)
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15. A method of authenticating multimedia content including at least an audio signal and a video signal, said method comprising:
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receiving the multimedia content, wherein the multimedia content comprises a first watermark embedded in the video signal, the first watermark including a first message;
decoding the first watermark to obtain the first message; and
determining whether the multimedia content is authentic based at least in part on the first message. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification