US5905800A
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Method and system for digital watermarking
Assignee: Wistaria Trading Ltd
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Filing: 1998-03-25
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Granted: 1999-05-18
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Expires: 2018-03-25
Abstract
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.
Inventors
- 👤 Scott A. Moskowitz
- 👤 Marc Cooperman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:35
CPC Classifications
G; G06; G06T; G06T1/00; G06T1/0021; G06T1/0028; G06T1/005; G06T1/0071; G06T1/0085; H; H04; H04L; H04L9/00; H04L9/32; H04L9/3247; G06T2201/00; G06T2201/005; G06T2201/0052; G06T2201/0083; G11; G11B; G11B20/00; G11B20/00086; G11B20/00884; H04L2209/00; H04L2209/60; H04L2209/608
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
63 words
A method for applying a digital watermark to a content signal, comprising the steps of: identifying a watermarking key comprising a binary sequence and information describing application of the binary sequence to the content signal; encoding the digital watermark within the content signal at one or more locations determined by the watermarking key; and generating a key pair associated with the watermarking key.
Claim 2
Independent Claim
63 words
A method for applying a digital watermark to a content signal, comprising the steps of: identifying a watermarking key comprising a binary sequence and information describing application of the binary sequence to the content signal; encoding the digital watermark within the content signal at one or more locations determined by the watermarking key; and generating a key pair associated with the watermarking key.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein the key pair includes a public key and a private key.
Claim 4
Dependent Claim
16 words
The method of claim 2, wherein the public key enables authentication of the encoded digital watermark.
Claim 5
Dependent Claim
18 words
The method of claim 3, wherein the public key does not enable decoding of the encoded digital watermark.
Claim 6
Dependent Claim
28 words
The method of claim 2, further comprising the step of adding a digital signature to the content signal, wherein the public key enables authentication of the digital signature.
Claim 7
Dependent Claim
18 words
The method of claim 5, wherein the public key does not enable decoding of the encoded digital watermark.
Claim 8
Dependent Claim
34 words
The method of claim 2, wherein the digital watermark comprises a multichannel watermark having a plurality of channels, and the public key enables decoding of less than all the channels of the multi-channel watermark.
Claim 9
Dependent Claim
24 words
The method of claim 1, further comprising the step of repeating said identifying and encoding steps for each of a plurality of digital watermarks.
Claim 10
Dependent Claim
23 words
The method of claim 8, further comprising the step of generating a public key associated with one of the plurality of digital watermarks.
Claim 11
Dependent Claim
16 words
The method of claim 9, wherein the public key enables authentication of the associated digital watermark.
Claim 12
Dependent Claim
16 words
The method of claim 9, wherein the public key enables decoding of the associated digital watermark.
Claim 13
Dependent Claim
32 words
The method of claim 1, wherein said step of encoding the digital watermark further comprises applying the digital watermark to the content signal to interfere with subsequent processing of the content signal.
Claim 14
Dependent Claim
15 words
The method of claim 12, wherein the subsequent processing comprises copying of the content signal.
Claim 15
Dependent Claim
18 words
The method of claim 12, wherein the subsequent processing comprises transfer of a file containing the content signal.
Claim 16
Dependent Claim
15 words
The method of claim 12, wherein the subsequent processing comprises playback of the content signal.
Claim 17
Dependent Claim
39 words
The method of claim 12, wherein said step of encoding the digital watermark further comprises applying the digital watermark to the content signal to interfere with subsequent processing of the content signal unless the digital watermark is first decoded.
Claim 18
Dependent Claim
39 words
The method of claim 12, wherein said step of encoding the digital watermark further comprises applying the digital watermark to the content signal to interfere with subsequent processing of the content signal unless the digital watermark is first authenticated.
Claim 19
Dependent Claim
35 words
The method of claim 1, further comprising the step of applying watermark synchronization information to the content signal, wherein the watermark synchronization information indicates a location of the encoded digital watermark within the content signal.
Claim 20
Dependent Claim
76 words
A digital watermarking system for encoding and decoding a digital watermark within a content signal, comprising a digital watermark encoder and a digital watermark decoder, wherein said digital watermark encoder and said digital watermark decoder are configured to respectively encode and decode a digital watermark using (1) a watermarking key comprising a binary sequence and information describing application of the binary sequence to the content signal and (2) a key pair associated with the watermarking key.
Claim 21
Dependent Claim
76 words
A digital watermarking system for encoding and decoding a digital watermark within a content signal, comprising a digital watermark encoder and a digital watermark decoder, wherein said digital watermark encoder and said digital watermark decoder are configured to respectively encode and decode a digital watermark using (1) a watermarking key comprising a binary sequence and information describing application of the binary sequence to the content signal and (2) a key pair associated with the watermarking key.
Claim 22
Dependent Claim
21 words
The digital watermarking system of claim 19, wherein said digital watermark encoder and said digital watermark decoder comprise separate software applications.
Claim 23
Dependent Claim
21 words
The digital watermarking system of claim 19, wherein said digital watermark encoder and said digital watermark decoder comprise separate hardware devices.
Claim 24
Independent Claim
73 words
A method for applying a digital watermark to a content signal, comprising the steps of: identifying a watermarking key comprising a binary sequence and information describing application of the binary sequence to the content signal, wherein the application of the binary sequence to the content signal is based on characteristics of the content signal; and encoding the digital watermark within the content signal at one or more locations determined by the watermarking key.
Claim 25
Independent Claim
73 words
A method for applying a digital watermark to a content signal, comprising the steps of: identifying a watermarking key comprising a binary sequence and information describing application of the binary sequence to the content signal, wherein the application of the binary sequence to the content signal is based on characteristics of the content signal; and encoding the digital watermark within the content signal at one or more locations determined by the watermarking key.
Claim 26
Dependent Claim
30 words
The method of claim 22, further comprising the step of generating a key pair associated with the watermarking key, the key pain including a public key and a private key.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-05-17 | 2002-11-16 | 2003-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-17 | 2006-11-16 | 2007-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-17 | 2010-11-16 | 2011-05-18 | $7700.00 | Window Closed / Lapsed |