Electronic watermark embedding method, device, and program, and electronic watermark detecting method, device, and program

An electronic watermarking and embedded device technology, which is applied in the direction of TV, electrical components, TV system components, etc., can solve the problems of sampling timing deviation, unstable frame rate, and difficulty in synchronization, so as to prevent the increase of processing time and the deterioration of quality The effect of less, high detection performance

Active Publication Date: 2012-06-27
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] When shooting video displayed on a screen or TV with a camera such as a video camera or a mobile phone, since the reproduced frame rate is not synchronized with the captured frame rate, resampling on sub-frames occurs, and the synchronization becomes more accurate. difficulty
In addition, when a low-performance processor such as a mobile phone is used, the frame rate of shooting may not be stable, and the sampling timing may be slightly deviated, which is also a cause of difficulty in synchronization.

Method used

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  • Electronic watermark embedding method, device, and program, and electronic watermark detecting method, device, and program
  • Electronic watermark embedding method, device, and program, and electronic watermark detecting method, device, and program
  • Electronic watermark embedding method, device, and program, and electronic watermark detecting method, device, and program

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Experimental program
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no. 1 Embodiment approach

[0362] Figure 10 The configurations of the digital watermark embedding device and the digital watermark detection device according to the first embodiment of the present invention are shown.

[0363]

[0364] First, a digital watermark embedding device will be described.

[0365] The digital watermark embedding device 100 is composed of a complex pattern generating unit 110, a time modulation unit 130, an embedding pattern superimposing unit 140, a first storage unit 150, and a second storage unit 160, and inputs the embedding information 911 and the pre-embedding signal 912, and outputs the embedding completed signal 923.

[0366] Next, the operation of the digital watermark embedding apparatus 100 will be described.

[0367] Figure 11 is a flowchart of the operation of the digital watermark embedding device according to the first embodiment of the present invention. The digital watermark embedding process of the digital watermark embedding apparatus 100 is implemente...

no. 2 Embodiment approach

[0707]

[0708] Next, a digital watermark embedding device and a digital watermark detection device according to a second embodiment will be described.

[0709] The digital watermark embedding device and digital watermark detection device of the present embodiment are examples in which time modulation and demodulation processing of the digital watermark embedding device and digital watermark detection device of the first embodiment are realized by one-dimensional Fourier transform processing.

[0710] The digital watermark embedding device of this embodiment has the same configuration as the digital watermark embedding device 100 of the first embodiment, and only the time modulation unit 130 is different in configuration.

[0711] In addition, the digital watermark detection device of this embodiment has the same configuration as the digital watermark detection device 200 of the first embodiment, and only the temporal demodulation unit 210 is different in configuration.

[0...

no. 3 Embodiment approach

[0762]

[0763] Next, a digital watermark embedding device and a digital watermark detection device according to a third embodiment of the present invention will be described.

[0764] This embodiment is an example of performing digital watermark embedding in the orthogonal transformation region in the digital watermark embedding device and digital watermark detection device of the first embodiment.

[0765] The digital watermark embedding device of the present embodiment has the same structure as the digital watermark embedding device of the first embodiment, except for the complex pattern generation unit.

[0766] In addition, the digital watermark detection device of the present embodiment has the same configuration as the digital watermark detection device of the first embodiment, except for the detection information extraction unit.

[0767]

[0768] Next, the complex pattern generator of this embodiment will be described.

[0769] Figure 36 The configuration of th...

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Abstract

An electronic watermark embedding device for embedding embedment information as an electronic watermark in an input signal having N or more dimensions (N is 2 or more an integer) and an electronic watermark detecting device are disclosed. The electronic watermark embedding device creates an embedment sequence according to embedment information, creates an (N-1)-dimensional pattern according to the embedment sequence, modulates a periodical signal according to the value on the (N-1)-dimensional pattern, thus creates an N-dimensional embedment pattern, superimposes the embedment pattern on the input signal, and outputs the resultant signal. The electronic watermark detecting device measures the component of a predetermined periodic signal in one dimensional direction of the input signal, obtains an (N-1)-dimensional pattern, obtains a detection sequence from the values of the (N-1)-dimensional pattern, and detects the embedded electronic watermark according to the magnitude of the value of the correlation between the detection sequence and the embedded sequence.

Description

technical field [0001] The present invention relates to an electronic watermark embedding method, device, program, and electronic watermark detection method, device, and program, and in particular to embedding other side information into an input signal starting with a video signal without being noticed, and from embedding A digital watermark embedding method, device, and program for reading the secondary information from a signal of the secondary information, and a digital watermark detection method, device, and program. Background technique [0002] As a prior art, there is a technology for copyright protection of digital content by embedding a digital watermark in the digital content. In addition, there is also a technique of referring to metadata such as copyright information related to digital content. Furthermore, there is also a technique of obtaining information related to advertisements by capturing digital content with a digital camera and reading digital watermar...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04N7/26H04N21/2389H04N21/44H04N21/4627H04N21/8358H04N19/00H04N1/387H04N7/08H04N7/24H04N19/196H04N19/467H04N19/60H04N19/70
CPCH04N21/23892H04N7/26372H04N21/44008H04N19/00557H04N21/4627H04N21/8358H04N19/467H04N1/387H04N5/913
Inventor山本奏中村高雄
OwnerNIPPON TELEGRAPH & TELEPHONE CORP