Patent US7945781B1 successfully refreshed from Google Patents.
US7945781B1
Expired / Lapsed
US
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Method and systems for inserting watermarks in digital signals
Assignee: Digimarc Corp
•
Filing: 2000-03-30
•
Granted: 2011-05-17
•
Expires: 2020-03-30
Abstract
Abstract The presently claimed invention relates generally to digital watermarking and steganographic encoding. One claim recites a method of encoding a watermark in a digital signal. The method includes generating varying key bits; and encoding the varying watermark key bits in the digital signal as a watermark with reference to at least characteristics of the digital signal. The “digital signal” may represent audio, video or imagery. Another claim recites a system for encoding a watermark in a digital signal. The system includes a processor: i) to map pseudo-random key and processing state information to effect an encode/decode map; and ii) to encode a watermark in a digital signal using the encode/decode map and characteristics of the digital signal. Of course other combinations are provided and claimed as well.
Inventors
- 👤 Geoffrey B. Rhoads
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:42
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/14; G06K7/1404; G06K7/1408; G06K7/1417; B; B42; B42D; B42D25/00; G06F; G06F16/00; G06F16/90; G06F16/95; G06F16/955; G06K19/00; G06K19/06; G06K19/06009; G06K19/06037; G06K19/06046; G06K19/08; G06K19/10; G06K19/14; G06K19/18; G06K7/1439; G06K7/1447; G06Q; G06Q20/00; G06Q20/08; G06Q20/12; G06Q20/123; G06Q20/1235; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/401; G06Q20/4014; G06Q20/40145; G06T; G06T1/00; G06T1/0021; G06T1/005; G06T1/0064; G06V; G06V30/00; G06V30/40; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G07C9/253; G07D; G07D7/00; G07D7/003; G07D7/0032; G07D7/0034; G07D7/004; G07F; G07F17/00; G07F17/0014; G07F17/16; G07F17/26; G07F7/00; G07F7/08; G07F7/086; G07F7/10; G07F7/1008; G07F7/1016; G07F7/12; G10; G10L; G10L19/00; G10L19/018; G11; G11B; G11B20/00; G11B20/00086; G11B20/00094; G11B20/00115; G11B20/00166; G11B20/00181; G11B20/0021; G11B20/00217; G11B20/00231; G11B20/0071; G11B20/00884; G11B20/00891; H; H04; H04B; H04B1/00; H04B1/66; H04B1/665; H04N; 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; H04N1/32203; H04N1/32208; H04N1/32251; H04N1/32288; H04N1/32352; H04N21/00; H04N21/20; H04N21/23; H04N21/238; H04N21/2389; H04N21/23892; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; H04N5/00; H04N5/76; H04N5/91; H04N5/913; G06K2019/06215; G06K2019/06253; G06T2201/00; G06T2201/005; G06T2201/0052; H04L; H04L2463/00; H04L2463/103; H04N1/32106; H04N1/32122; H04N2005/91307; H04N2005/91321; H04N2005/91335; 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; H04W; H04W24/00
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
40 words
A method of encoding a watermark in a digital signal, the method comprising: generating varying key bits; and encoding the varying key bits in the digital signal as a watermark with reference to at least characteristics of the digital signal.
Claim 2
Independent Claim
40 words
A method of encoding a watermark in a digital signal, the method comprising: generating varying key bits; and encoding the varying key bits in the digital signal as a watermark with reference to at least characteristics of the digital signal.
Claim 3
Dependent Claim
15 words
The method of claim 1 , wherein the digital signal represents audio, imagery or video.
Claim 4
Independent Claim
28 words
A method of steganographically encoding bits in a digital signal, the method comprising: generating varying key bits; and steganographically encoding the digital signal using the varying key bits.
Claim 5
Independent Claim
28 words
A method of steganographically encoding bits in a digital signal, the method comprising: generating varying key bits; and steganographically encoding the digital signal using the varying key bits.
Claim 6
Dependent Claim
15 words
The method of claim 3 , wherein the digital signal represents audio, imagery or video.
Claim 7
Independent Claim
39 words
A method of encoding a watermark in a digital signal, the method comprising: mapping key information to effect an encode/decode map; and encoding the watermark in the digital signal using the encode/decode map and characteristics of the digital signal.
Claim 8
Independent Claim
39 words
A method of encoding a watermark in a digital signal, the method comprising: mapping key information to effect an encode/decode map; and encoding the watermark in the digital signal using the encode/decode map and characteristics of the digital signal.
Claim 9
Dependent Claim
15 words
The method of claim 5 , wherein the digital signal represents audio, imagery or video.
Claim 10
Independent Claim
43 words
A method of generating a noise signal to produce watermark information, the method comprising: generating a noise signal as a function of at least one variable which depends on key and processing state information; and providing the generated noise signal as watermark information.
Claim 11
Independent Claim
43 words
A method of generating a noise signal to produce watermark information, the method comprising: generating a noise signal as a function of at least one variable which depends on key and processing state information; and providing the generated noise signal as watermark information.
Claim 12
Independent Claim
45 words
A system for encoding a watermark in a digital signal, the system comprising: a generator configured to generate a pseudo-random key; and an encoder configured to encode a watermark in the digital signal using: i) the pseudo-random key; and ii) characteristics of the digital signal.
Claim 13
Independent Claim
45 words
A system for encoding a watermark in a digital signal, the system comprising: a generator configured to generate a pseudo-random key; and an encoder configured to encode a watermark in the digital signal using: i) the pseudo-random key; and ii) characteristics of the digital signal.
Claim 14
Dependent Claim
19 words
The system of claim 8 , wherein the generator is selected from a non-linear generator or a scrambling generator.
Claim 15
Dependent Claim
21 words
The system of claim 8 , wherein the characteristics of the digital signal comprise mathematically defined functions of the digital signal.
Claim 16
Dependent Claim
15 words
The system of claim 8 , wherein the digital signal represents audio, imagery or video.
Claim 17
Independent Claim
47 words
A system for encoding a watermark in a digital signal, the system comprising: a processor configured to: map pseudo-random key and processing state information to effect an encode/decode map; and encode a watermark in the digital signal using the encode/decode map and characteristics of the digital signal.
Claim 18
Independent Claim
47 words
A system for encoding a watermark in a digital signal, the system comprising: a processor configured to: map pseudo-random key and processing state information to effect an encode/decode map; and encode a watermark in the digital signal using the encode/decode map and characteristics of the digital signal.
Claim 19
Dependent Claim
30 words
The system of claim 12 , wherein the processor maps the pseudo-random key and processing state information to effect an encode/decode map using a non-linear generator or a scrambling generator.
Claim 20
Dependent Claim
21 words
The system of claim 12 , wherein the characteristics of the digital signal comprise mathematically defined functions of the digital signal.
Claim 21
Dependent Claim
15 words
The system of claim 12 , wherein the digital signal represents audio, imagery or video.
Claim 22
Dependent Claim
43 words
A non-transitory computer readable medium having instructions stored thereon, the instructions comprising: instructions to generate varying key bits; and instructions to encode the varying key bits in a digital signal as a watermark with reference to at least characteristics of the digital signal.
Claim 23
Dependent Claim
43 words
A non-transitory computer readable medium having instructions stored thereon, the instructions comprising: instructions to generate varying key bits; and instructions to encode the varying key bits in a digital signal as a watermark with reference to at least characteristics of the digital signal.
Claim 24
Independent Claim
26 words
A system comprising: a generator configured to generate varying key bits; and an encoder configured to steganographically encode a digital signal using the varying key bits.
Claim 25
Independent Claim
26 words
A system comprising: a generator configured to generate varying key bits; and an encoder configured to steganographically encode a digital signal using the varying key bits.
Claim 26
Dependent Claim
30 words
A tangible computer-readable medium having instructions stored thereon, the instructions comprising: instructions to generate varying key bits; and instructions to steganographically encode a digital signal using the varying key bits.
Claim 27
Dependent Claim
30 words
A tangible computer-readable medium having instructions stored thereon, the instructions comprising: instructions to generate varying key bits; and instructions to steganographically encode a digital signal using the varying key bits.
Claim 28
Dependent Claim
41 words
A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising: instructions to map key information to effect an encode/decode map; and instructions to encode a watermark in a digital signal using the encode/decode map and characteristics of the digital signal.
Claim 29
Dependent Claim
41 words
A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising: instructions to map key information to effect an encode/decode map; and instructions to encode a watermark in a digital signal using the encode/decode map and characteristics of the digital signal.
Claim 30
Independent Claim
40 words
A system comprising: a generator configured to generate a noise signal as a function of at least one variable which depends on key and processing state information; and a provider configured to provide the generated noise signal as watermark information.
Claim 31
Independent Claim
40 words
A system comprising: a generator configured to generate a noise signal as a function of at least one variable which depends on key and processing state information; and a provider configured to provide the generated noise signal as watermark information.
Claim 32
Dependent Claim
44 words
A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising: instructions to generate a noise signal as a function of at least one variable which depends on key and processing state information; and instructions to provide the generated noise signal as watermark information.
Claim 33
Dependent Claim
44 words
A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising: instructions to generate a noise signal as a function of at least one variable which depends on key and processing state information; and instructions to provide the generated noise signal as watermark information.
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