KR20010012250A - 워터마크 검출 - Google Patents
워터마크 검출 Download PDFInfo
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- KR20010012250A KR20010012250A KR1019997010201A KR19997010201A KR20010012250A KR 20010012250 A KR20010012250 A KR 20010012250A KR 1019997010201 A KR1019997010201 A KR 1019997010201A KR 19997010201 A KR19997010201 A KR 19997010201A KR 20010012250 A KR20010012250 A KR 20010012250A
- Authority
- KR
- South Korea
- Prior art keywords
- watermark
- information signal
- fourier
- correlation
- detecting
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000001131 transforming effect Effects 0.000 claims 4
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000010606 normalization Methods 0.000 description 12
- 239000013598 vector Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000021615 conjugation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010027476 Metastases Diseases 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000009401 metastasis Effects 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010845 search algorithm Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
- G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
- G06T1/0071—Robust watermarking, e.g. average attack or collusion attack resistant using multiple or alternating watermarks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
- H04H20/31—Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/50—Aspects of broadcast communication characterised by the use of watermarks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Editing Of Facsimile Originals (AREA)
- Image Processing (AREA)
- Television Systems (AREA)
- Burglar Alarm Systems (AREA)
- Holo Graphy (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Storage Device Security (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Traffic Control Systems (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Stereo-Broadcasting Methods (AREA)
- Radar Systems Or Details Thereof (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Image Analysis (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
Description
Claims (8)
- 정보 신호에서의 워터마크 검출 방법으로서,상기 정보 신호와 상기 워터마크와의 상관관계를 나타내는 값을 계산하는 단계, 및상기 상관 값이 소정의 임계값보다 큰지의 여부를 검출하는 단계를 포함하는, 상기 정보 신호에서의 워터마크 검출 방법에 있어서,상기 계산 단계는 상기 정보 신호와 상기 워터마크를 각각의 퓨리에 계수들로 퓨리에 변환하는 단계, 상기 정보 신호에 대한 워터마크의 다수의 위치 중 하나에 각각 대응하는 상관 값들을 나타내는 퓨리에 계수를 구비하도록 대응하는 계수들을 승산하는 단계, 및, 상관 값들을 나타내는 퓨리에 계수들을 역 변환하는 단계를 포함하고,상기 검출 단계는 상기 상관 값들 중의 적어도 하나가 소정의 임계값보다 큰지의 여부를 검출하는 단계를 포함하며,상기 워터마크 검출 방법은 실질적으로 같은 크기의 상관 값들을 나타내는 퓨리에 계수들을 정규화하는 단계를 더 포함하는 것을 특징으로 하는 정보 신호에서 워터마크 검출 방법.
- 제 1항에 있어서,상기 정규화하는 단계가 상기 정보 신호를 나타내는 퓨리에 계수들에 적용되는 단계를 포함하는 정보 신호에서의 워터마크 검출 방법.
- 제 2항에 있어서,상기 정규화하는 단계가 워터마크를 나타내는 퓨리에 계수들에 또한 적용되는 단계를 포함하는 정보 신호에서의 워터마크 검출 방법.
- 제 1항에 있어서,상기 정규화하는 단계가 각각의 크기에 의해 각각의 퓨리에 계수를 나누는 단계를 포함하는 정보 신호에서의 워터마크 검출 방법.
- 제 1항에 있어서,상기 정규화하는 단계는 각각의 퓨리에 계수에서 가장 큰 값에 따라서 각각의 퓨리에 계수를 실수부 또는 허수부로 나누는 단계를 포함하는 정보 신호에서의 워터마크 검출 방법.
- 제 5항에 있어서,상기 나누는 단계는 2의 거듭제곱으로 나누는 단계를 포함하는 정보 신호에서의 워터마크 검출 방법.
- 정보 신호(q)에서의 워터마크(w)를 검출하기 위한 장치로서,상기 정보 신호와 상기 워터마크와의 상관관계를 표시하는 값(d)을 계산하기 위한 수단(24-28), 및상기 상관 값이 소정의 임계값보다 큰지의 여부를 검출하기 위한 수단(29)을 포함하는 정보 신호에서의 워터마크 검출 장치에 있어서,상기 계산 수단은 상기 정보 신호와 상기 워터마크를 퓨리에 계수들로 퓨리에 변환하는 수단(24, 25), 상기 정보 신호에 대한 상기 워터마크의 다수의 위치 중 하나에 각각 대응하는 상관 값들을 나타내는 퓨리에 계수들을 구비하도록 대응하는 계수들을 승산하는 수단(27), 및 상관 값들을 나타내는 퓨리에 계수들을 역 변환하기 위한 수단(28)을 포함하고,상기 검출 수단(29)은 상기 상관 값들 중의 적어도 하나가 소정의 임계값보다 큰지의 여부를 검출하기 위해 배치되고,상기 장치에서 실질적으로 같은 크기들의 상관 값들을 나타내는 퓨리에 계수들을 정규화하는 수단(30)을 더 포함하는 배치를 특징으로 하는 정보 신호(q)에서 워터마크(w)를 검출하기 위한 장치.
- 정보 신호를 기록 재생하기 위한 장치로서, 상기 신호에서의 워터마크의 존재에 따라서 비디오 신호의 기록 재생을 무력화하기 위한 수단(72)을 포함하는 정보 신호 기록 재생 장치에 있어서,제 7항에서 청구된 바와 같이 상기 신호에서의 상기 워터마크 검출을 위한 장치(74)를 포함하는 상기 장치를 특징으로 하는 정보 신호를 기록 재생하기 위한 장치.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98200656 | 1998-03-04 | ||
EP98200656.1 | 1998-03-04 | ||
PCT/IB1999/000359 WO1999045707A2 (en) | 1998-03-04 | 1999-03-02 | Watermark detection |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20010012250A true KR20010012250A (ko) | 2001-02-15 |
KR100648845B1 KR100648845B1 (ko) | 2006-11-24 |
Family
ID=8233435
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019997010163A KR20010012214A (ko) | 1998-03-04 | 1999-02-18 | 워터마크 검출 방법 및 장치 |
KR1019997010162A KR100611521B1 (ko) | 1998-03-04 | 1999-03-02 | 신호에 보조 데이터를 삽입하기 위한 방법 및 장치 |
KR1019997010201A KR100648845B1 (ko) | 1998-03-04 | 1999-03-02 | 워터마크 검출 |
KR1019997010195A KR100614425B1 (ko) | 1998-03-04 | 1999-03-02 | 워터마크 검출 방법 및 장치 |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019997010163A KR20010012214A (ko) | 1998-03-04 | 1999-02-18 | 워터마크 검출 방법 및 장치 |
KR1019997010162A KR100611521B1 (ko) | 1998-03-04 | 1999-03-02 | 신호에 보조 데이터를 삽입하기 위한 방법 및 장치 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019997010195A KR100614425B1 (ko) | 1998-03-04 | 1999-03-02 | 워터마크 검출 방법 및 장치 |
Country Status (14)
Country | Link |
---|---|
US (6) | US6971011B1 (ko) |
EP (4) | EP0981900A2 (ko) |
JP (4) | JP2001525151A (ko) |
KR (4) | KR20010012214A (ko) |
CN (4) | CN1153456C (ko) |
AT (3) | ATE381209T1 (ko) |
AU (1) | AU2437499A (ko) |
BR (1) | BR9904848A (ko) |
DE (3) | DE69938278T2 (ko) |
ES (1) | ES2297919T3 (ko) |
ID (1) | ID23884A (ko) |
PL (2) | PL336845A1 (ko) |
RU (2) | RU2222114C2 (ko) |
WO (4) | WO1999045704A2 (ko) |
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