US6246775B1
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Method and appartus for superposing a digital watermark and method and apparatus for detecting a digital watermark
Assignee: Pioneer Corp
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Filing: 1998-09-14
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Granted: 2001-06-12
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Expires: 2018-09-14
Abstract
Abstract An apparatus for superposing a digital watermark for superposing digital watermark information on an information data signal bearing original information, superposes digital watermark information on an information data signal bearing original information, for each unit block consisting of a group of pieces of information data. This apparatus is provided with an auxiliary embedding circuit 10 for embedding second digital watermark information in the information data; a blocking circuit 12 for dividing into the unit blocks the changed information data signal obtained by the auxiliary embedding circuit; and a main embedding circuit 20 for embedding first digital watermark information in the changed information data signal for each of the divided blocks. The second digital watermark information bears information for identifying the position of the divided unit block in a predetermined section of the information data signal. On the basis of the second watermark information, a detecting apparatus effects proper blocking with respect to the information data signal with the watermark embedded therein, so as to detect the first watermark information.
Inventors
- 👤 Takeshi Nakamura
- 👤 Kazumi Sugaya
- 👤 Yoshiaki Oriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:49
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/46; H04N19/467; G; G06; G06T; G06T1/00; G06T1/0021; G06T1/005; G06T1/0064; G06T1/0071; H04N1/00; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32154; H04N1/32165; H04N1/32203; H04N1/32208; H04N1/32352; H04N19/60; H04N21/00; H04N21/20; H04N21/23; H04N21/238; H04N21/2389; H04N21/23892; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; G06T2201/00; G06T2201/005; G06T2201/0052; G06T2201/0061; G06T2201/0065; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225; H04N2201/3233; H04N2201/3269; H04N2201/327
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
102 words
A method for superposing a digital watermark containing digital watermark information on an information data signal bearing original information, for each of a plurality of unit blocks containing a group of pieces of information data, comprising: embedding position information in the information data signal to produce a changed information data signal; dividing the changed information data signal into the unit blocks; and embedding the digital watermark information in the changed information data signal for each of the unit blocks, wherein the position information bears information for recognizing a position of the unit blocks in a predetermined section of the information data signal.
Claim 2
Independent Claim
102 words
A method for superposing a digital watermark containing digital watermark information on an information data signal bearing original information, for each of a plurality of unit blocks containing a group of pieces of information data, comprising: embedding position information in the information data signal to produce a changed information data signal; dividing the changed information data signal into the unit blocks; and embedding the digital watermark information in the changed information data signal for each of the unit blocks, wherein the position information bears information for recognizing a position of the unit blocks in a predetermined section of the information data signal.
Claim 3
Dependent Claim
21 words
The method for superposing a digital watermark according to claim 1 , wherein the information data signal is a video signal.
Claim 4
Independent Claim
115 words
An apparatus for superposing a digital watermark containing digital watermark information on an information data signal bearing original information, for each of a plurality of unit blocks containing a group of pieces of information data, comprising: an auxiliary embedding circuit that embeds position information in the information data signal to produce a changed information data signal; a blocking circuit that divides the changed information data signal into the unit blocks; and a main embedding circuit that embeds digital watermark information in the changed information data signal for each of the unit blocks, wherein the position information bears information for identifying a position of the unit blocks in a predetermined section of the information data signal.
Claim 5
Independent Claim
115 words
An apparatus for superposing a digital watermark containing digital watermark information on an information data signal bearing original information, for each of a plurality of unit blocks containing a group of pieces of information data, comprising: an auxiliary embedding circuit that embeds position information in the information data signal to produce a changed information data signal; a blocking circuit that divides the changed information data signal into the unit blocks; and a main embedding circuit that embeds digital watermark information in the changed information data signal for each of the unit blocks, wherein the position information bears information for identifying a position of the unit blocks in a predetermined section of the information data signal.
Claim 6
Dependent Claim
21 words
The apparatus for superposing a digital watermark according to claim 3 , wherein the information data signal is a video signal.
Claim 7
Dependent Claim
29 words
The apparatus for superposing a digital watermark according to claim 4 , wherein the position information is information of a random pattern generated on the basis of an M-sequence.
Claim 8
Dependent Claim
29 words
The apparatus for superposing a digital watermark according to claim 3 , wherein the position information is information of a random pattern generated on the basis of an M-sequence.
Claim 9
Independent Claim
126 words
A method for detecting a digital watermark for detecting digital watermark information from a changed information data signal generated by superposing the digital watermark information on an information data signal, for each of a plurality of unit blocks containing a group of pieces of information data, comprising: detecting position information from the changed information data signal, wherein the position information corresponds to positions of the unit blocks; recognizing a recognized position of a unit block in a predetermined section of the changed information data signal based on the position information; dividing the changed information data signal into the unit blocks based on the recognized position; and detecting the digital watermark information for each of the unit blocks into which the changed information data signal is divided.
Claim 10
Independent Claim
126 words
A method for detecting a digital watermark for detecting digital watermark information from a changed information data signal generated by superposing the digital watermark information on an information data signal, for each of a plurality of unit blocks containing a group of pieces of information data, comprising: detecting position information from the changed information data signal, wherein the position information corresponds to positions of the unit blocks; recognizing a recognized position of a unit block in a predetermined section of the changed information data signal based on the position information; dividing the changed information data signal into the unit blocks based on the recognized position; and detecting the digital watermark information for each of the unit blocks into which the changed information data signal is divided.
Claim 11
Dependent Claim
21 words
The method for detecting a digital watermark according to claim 7 , wherein the information data signal is a video signal.
Claim 12
Independent Claim
139 words
An apparatus for detecting a digital watermark containing digital watermark information from a changed information data signal generated by superposing the digital watermark information on an information data signal, for each of plurality of unit blocks containing a group of pieces of information data, comprising: a position information detector that detects position information from the changed information data signal, wherein the position information corresponds to positions of the unit blocks; and a recognizing circuit that recognizes a recognized position of a unit block in a predetermined section of the changed information data signal based on the position information; a blocking circuit that divides the changed information data signal into the unit blocks based on the recognized position; and a watermark information detector that detects the digital watermark information for each of the unit blocks divided by the blocking circuit.
Claim 13
Independent Claim
139 words
An apparatus for detecting a digital watermark containing digital watermark information from a changed information data signal generated by superposing the digital watermark information on an information data signal, for each of plurality of unit blocks containing a group of pieces of information data, comprising: a position information detector that detects position information from the changed information data signal, wherein the position information corresponds to positions of the unit blocks; and a recognizing circuit that recognizes a recognized position of a unit block in a predetermined section of the changed information data signal based on the position information; a blocking circuit that divides the changed information data signal into the unit blocks based on the recognized position; and a watermark information detector that detects the digital watermark information for each of the unit blocks divided by the blocking circuit.
Claim 14
Dependent Claim
21 words
The apparatus for detecting a digital watermark according to claim 9 , wherein the information data signal is a video signal.
Claim 15
Dependent Claim
24 words
The apparatus for detecting a digital watermark according to claim 10 , wherein the video signal bears an image of a letter box type.
Claim 16
Dependent Claim
42 words
The apparatus for detecting a digital watermark according to claim 11 , wherein said position information detector detects the position information from the changed information data signal on the basis of information of a random pattern generated in accordance with an M-sequence.
Claim 17
Dependent Claim
24 words
The apparatus for detecting a digital watermark according to claim 10 , wherein the video signal bears an image of a pan scan type.
Claim 18
Dependent Claim
42 words
The apparatus for detecting a digital watermark according to claim 13 , wherein said position information detector detects the position information from the changed information data signal on the basis of information of a random pattern generated in accordance with an M-sequence.
Claim 19
Dependent Claim
42 words
The apparatus for detecting a digital watermark according to claim 10 , wherein said position information detector detects the position information from the changed information data signal on the basis of information of a random pattern generated in accordance with an M-sequence.
Claim 20
Dependent Claim
42 words
The apparatus for detecting a digital watermark according to claim 9 , wherein said position information detector detects the position information from the changed information data signal on the basis of information of a random pattern generated in accordance with an M-sequence.
Claim 21
Independent Claim
77 words
A method for superposing a digital watermark containing digital watermark information on each of a plurality unit blocks created by dividing an information data signal, comprising: embedding position information in the information data signal, wherein the position information corresponds to a position of the unit blocks in the information data signal; dividing the information data signal containing the embedded position information into the unit blocks; and embedding the digital watermark information in each of the unit blocks.
Claim 22
Independent Claim
77 words
A method for superposing a digital watermark containing digital watermark information on each of a plurality unit blocks created by dividing an information data signal, comprising: embedding position information in the information data signal, wherein the position information corresponds to a position of the unit blocks in the information data signal; dividing the information data signal containing the embedded position information into the unit blocks; and embedding the digital watermark information in each of the unit blocks.
Claim 23
Dependent Claim
29 words
The method for superposing a digital watermark according to claim 17 , wherein the position information is information of a random pattern generated on the basis of an M-sequence.
Claim 24
Independent Claim
86 words
An apparatus for superposing a digital watermark containing digital watermark information on each of a plurality unit blocks created by dividing an information data signal, comprising: an auxiliary embedding device that embeds position information in the information data signal, wherein the position information corresponds to a position of the unit blocks in the information data signal; a blocking device that divides the information data signal into the unit blocks; and a watermark embedding device that embeds the digital watermark information in each of the unit blocks.
Claim 25
Independent Claim
86 words
An apparatus for superposing a digital watermark containing digital watermark information on each of a plurality unit blocks created by dividing an information data signal, comprising: an auxiliary embedding device that embeds position information in the information data signal, wherein the position information corresponds to a position of the unit blocks in the information data signal; a blocking device that divides the information data signal into the unit blocks; and a watermark embedding device that embeds the digital watermark information in each of the unit blocks.
Claim 26
Dependent Claim
29 words
The apparatus for superposing a digital watermark according to claim 19 , wherein the position information is information of a random pattern generated on the basis of an M-sequence.
Claim 27
Independent Claim
92 words
A method for detecting a digital watermark containing digital watermark information from an information data signal, wherein the digital watermark information is embedded in each of a plurality of unit blocks created by dividing the information data signal and wherein the method comprises: detecting position information corresponding to a position of the unit blocks in the information data signal; recognizing the position of the unit blocks; dividing the information data signal into the unit blocks based on the recognized position; and detecting the digital watermark information in each of the unit blocks.
Claim 28
Independent Claim
92 words
A method for detecting a digital watermark containing digital watermark information from an information data signal, wherein the digital watermark information is embedded in each of a plurality of unit blocks created by dividing the information data signal and wherein the method comprises: detecting position information corresponding to a position of the unit blocks in the information data signal; recognizing the position of the unit blocks; dividing the information data signal into the unit blocks based on the recognized position; and detecting the digital watermark information in each of the unit blocks.
Claim 29
Dependent Claim
29 words
The method for detecting a digital watermark according to claim 21 , wherein the position information is information of a random pattern generated on the basis of an M-sequence.
Claim 30
Independent Claim
117 words
An apparatus for detecting a digital watermark containing digital watermark information from an information data signal, wherein the digital watermark information is embedded in each of a plurality of unit blocks created by dividing the information data signal and wherein the apparatus comprises: a position information detecting device that detects position information contained in the information data signal, wherein the position information corresponds to a position of the unit blocks; a recognizing device that recognizes the position of the unit blocks; a blocking device that divides the information data signal into the unit blocks based on the recognized position; and a watermark information detecting device that detects the digital watermark information in each of the unit blocks.
Claim 31
Independent Claim
117 words
An apparatus for detecting a digital watermark containing digital watermark information from an information data signal, wherein the digital watermark information is embedded in each of a plurality of unit blocks created by dividing the information data signal and wherein the apparatus comprises: a position information detecting device that detects position information contained in the information data signal, wherein the position information corresponds to a position of the unit blocks; a recognizing device that recognizes the position of the unit blocks; a blocking device that divides the information data signal into the unit blocks based on the recognized position; and a watermark information detecting device that detects the digital watermark information in each of the unit blocks.
Claim 32
Dependent Claim
38 words
The apparatus for detecting a digital watermark according to claim 23 , wherein the position information detecting device detects the position information from the information data signal based on a random pattern generated in accordance with an M-sequence.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-06-11 | 2004-12-11 | 2005-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-11 | 2008-12-11 | 2009-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-11 | 2012-12-11 | 2013-06-12 | $7700.00 | Window Closed / Lapsed |