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US6424725B1
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Determining transformations of media signals with embedded code signals
Assignee: Digimarc Corp
•
Filing: 2000-05-08
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Granted: 2002-07-23
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Expires: 2020-05-08
Abstract
Abstract An embedded signal detection process determines a transformation of a media signal subsequent to the encoding of an embedded code signal into the media signal. The process performs a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal. It then computes the translation of the embedded code signal in the sampled signal to determine scaling of the media signal subsequent to the encoding of the embedded signal in the media signal.
Inventors
- 👤 Geoffrey B. Rhoads
- 👤 Ravi K. Sharma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:07
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; G; G06; G06T; G06T1/00; G06T1/0021; G06T1/005; G06T1/0064; G06V; G06V30/00; G06V30/40; G10; G10L; G10L19/00; G10L19/018; H04N1/00; H04N1/00002; H04N1/00005; H04N1/00026; H04N1/00037; H04N1/00071; H04N1/00074; H04N1/00079; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32154; H04N1/3216; H04N1/3232; H04N1/32352; H04N21/20; H04N21/23; H04N21/238; H04N21/2389; H04N21/23892; G06T2201/00; G06T2201/005; G06T2201/0051; G06T2201/0052; H04N1/32106; H04N1/32122; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3204; H04N2201/3205; H04N2201/3207; H04N2201/3225; H04N2201/3226; H04N2201/3233; H04N2201/3269; H04N2201/327; H04N2201/3271; H04N2201/3274; H04N2201/328
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
77 words
A method of determining a transformation of a media signal having an embedded code signal, the method comprising: performing a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling of the media signal subsequent to the encoding of the embedded signal in the media signal.
Claim 2
Independent Claim
77 words
A method of determining a transformation of a media signal having an embedded code signal, the method comprising: performing a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling of the media signal subsequent to the encoding of the embedded signal in the media signal.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the embedded code signal comprises a set of impulse functions in a transform domain.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein the impulse functions are have random or pseudo random phase.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein phase attributes of the embedded code signal is used to compute translation.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein the media signal comprises an audio signal.
Claim 7
Dependent Claim
31 words
The method of claim 4 wherein the embedded code signal is comprised of two or more components, and the phase attributes comprises pseudo random phases of the two or more components.
Claim 8
Dependent Claim
18 words
The method of claim 6 wherein the two or more components comprise impulse functions in a transform domain.
Claim 9
Dependent Claim
13 words
The method of claim 7 wherein the media signal is an audio signal.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein the media signal comprises an audio signal.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the logarithmic sampling is performed on transform domain data of the media signal.
Claim 12
Dependent Claim
66 words
The method of claim 1 wherein the embedded code signal comprises a set of impulse functions, the media signal is a two dimensional signal and including: performing a logarithmic sampling of each dimension of the media signal to create the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling of the media signal in each of the dimensions.
Claim 13
Dependent Claim
27 words
The method of claim 11 wherein the impulse functions are in a transform domain and logarithmic sampling is performed on transform domain data of the media signal.
Claim 14
Dependent Claim
69 words
The method of claim 1 wherein the embedded code signal comprises a set of impulse functions, the media signal is a three dimensional signal and including: performing a logarithmic sampling of each of the three dimensions of the media signal to create the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling of the media signal in each of the dimensions.
Claim 15
Dependent Claim
30 words
The method of claim 13 wherein the set of impulse functions are in a transform domain and the logarithmic sampling is performed on transform domain data of the media signal.
Claim 16
Dependent Claim
37 words
The method of claim 13 wherein the media signal comprises a sequence of video frames and the three dimensions comprise vertical and horizontal spatial dimensions in each frame and a temporal dimension of the sequence of frames.
Claim 17
Dependent Claim
72 words
The method of claim 1 wherein the media signal is a two dimensional signal and including: performing a logarithmic and polar sampling of the two dimensional signal to create the sampled signal in which both scaling and rotation of the two dimensional signal are converted to translation in the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling and rotation of the media signal.
Claim 18
Dependent Claim
21 words
The method of claim 16 wherein the logarithmic or polar sampling is performed on transform domain data of the media signal.
Claim 19
Dependent Claim
87 words
The method of claim 1 wherein the media signal is a sequence of video frames and including: performing a logarithmic and polar sampling of one or more frames and a logarithmic sampling of the temporal dimension of the sequence of frames to create sampled signals; and computing translation of the embedded code signal in the sampled signals to determine scaling and rotation of one or more frames and temporal scaling of the frames relative to the media signal at an encoding time of the embedded code signal.
Claim 20
Dependent Claim
17 words
A computer readable medium on which is stored software for performing the method of claim 1 .
Claim 21
Independent Claim
92 words
A method of determining orientation of an embedded code signal in a media signal that has been transformed since encoding of the embedded code signal in the media signal, the method comprising: performing a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling of the embedded code signal subsequent to the encoding of the embedded signal in the media signal.
Claim 22
Independent Claim
92 words
A method of determining orientation of an embedded code signal in a media signal that has been transformed since encoding of the embedded code signal in the media signal, the method comprising: performing a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling of the embedded code signal subsequent to the encoding of the embedded signal in the media signal.
Claim 23
Dependent Claim
20 words
The method of claim 20 wherein the embedded code signal comprises a set of impulse functions in a transform domain.
Claim 24
Dependent Claim
13 words
The method of claim 21 wherein the impulse functions have pseudo random phase.
Claim 25
Dependent Claim
13 words
The method of claim 20 wherein the media signal comprises an audio signal.
Claim 26
Dependent Claim
54 words
The method of claim 20 wherein the media signal is a two dimensional signal and including: performing a logarithmic and polar sampling of the two dimensional signal to create the sampled signal; and computing translation of the embedded code signal in the sampled signal to determine scaling and rotation of the embedded code signal.
Claim 27
Dependent Claim
17 words
A computer readable medium on which is stored software for performing the method of claim 20 .
Claim 28
Independent Claim
81 words
A system for determining a transformation of a media signal having an embedded code signal, the method comprising: means for performing a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal; and means for computing translation of the embedded code signal in the sampled signal to determine scaling of the media signal subsequent to the encoding of the embedded signal in the media signal.
Claim 29
Independent Claim
81 words
A system for determining a transformation of a media signal having an embedded code signal, the method comprising: means for performing a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal; and means for computing translation of the embedded code signal in the sampled signal to determine scaling of the media signal subsequent to the encoding of the embedded signal in the media signal.
Claim 30
Dependent Claim
13 words
The system of claim 26 wherein the media signal is an audio signal.
Claim 31
Dependent Claim
26 words
The system of claim 26 wherein the scaling of the media signal is used to determine orientation of the embedded code signal in the media signal.
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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) | 2005-07-22 | 2006-01-21 | 2006-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-22 | 2010-01-21 | 2010-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-22 | 2014-01-21 | 2014-07-23 | $7700.00 | Window Closed / Lapsed |