Collusion attack prevention
US-2024362739-A1 · Oct 31, 2024 · US
Digital watermark embedding apparatus and method, and digital watermark detecting apparatus and method
US9014418B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9014418-B2 |
| Application number | US-201213659490-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 24, 2012 |
| Priority date | Nov 29, 2011 |
| Publication date | Apr 21, 2015 |
| Grant date | Apr 21, 2015 |
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Abstract
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A digital watermark embedding apparatus is disclosed. A first codeword including a bit sequence of digital watermark information is generated. A cyclic shift sequence is generated based on the digital watermark information. A second codeword is generated by cyclically shifting the first codeword based on the generated cyclic shift sequence. The generated second codeword is embedded in contents.
First claim
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What is claimed is: 1. A digital watermark embedding apparatus, comprising: a codeword generation part configured to generate a first codeword including a bit sequence of digital watermark information; a shift sequence generation part configured to generate a cyclic shift sequence based on the digital watermark information; a shifting part configured to generate a second codeword by cyclically shifting a part of the first codeword based on the cyclic shift sequence generated b…
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Electricity · mapped topic
Electricity · mapped topic
- G06T1/005Primary
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9014418B2 cover?
- A digital watermark embedding apparatus is disclosed. A first codeword including a bit sequence of digital watermark information is generated. A cyclic shift sequence is generated based on the digital watermark information. A second codeword is generated by cyclically shifting the first codeword based on the generated cyclic shift sequence. The generated second codeword is embedded in contents.
- Who is the assignee on this patent?
- Fujitsu Ltd
- What technology area does this patent fall under?
- Primary CPC classification G06T1/005. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 21 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).