SG94672A1 - Method and apparatus for encrypting and decrypting time domain signals - Google Patents

Method and apparatus for encrypting and decrypting time domain signals

Info

Publication number
SG94672A1
SG94672A1 SG9600630A SG1996000630A SG94672A1 SG 94672 A1 SG94672 A1 SG 94672A1 SG 9600630 A SG9600630 A SG 9600630A SG 1996000630 A SG1996000630 A SG 1996000630A SG 94672 A1 SG94672 A1 SG 94672A1
Authority
SG
Singapore
Prior art keywords
encrypting
time domain
domain signals
decrypting time
decrypting
Prior art date
Application number
SG9600630A
Other languages
English (en)
Inventor
John O Ryan
Original Assignee
Macrovision Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Macrovision Corp filed Critical Macrovision Corp
Publication of SG94672A1 publication Critical patent/SG94672A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Signal Processing For Recording (AREA)
SG9600630A 1989-09-06 1990-09-05 Method and apparatus for encrypting and decrypting time domain signals SG94672A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/403,514 US5058157A (en) 1989-09-06 1989-09-06 Method and apparatus for encrypting and decrypting time domain signals

Publications (1)

Publication Number Publication Date
SG94672A1 true SG94672A1 (en) 2003-03-18

Family

ID=23596059

Family Applications (1)

Application Number Title Priority Date Filing Date
SG9600630A SG94672A1 (en) 1989-09-06 1990-09-05 Method and apparatus for encrypting and decrypting time domain signals

Country Status (15)

Country Link
US (2) US5058157A (xx)
EP (1) EP0416894B1 (xx)
JP (1) JP3065642B2 (xx)
KR (1) KR0144343B1 (xx)
CN (1) CN1020233C (xx)
AU (1) AU628637B2 (xx)
BR (1) BR9004419A (xx)
CA (1) CA2024641C (xx)
DE (2) DE69028166T2 (xx)
ES (1) ES2023786T3 (xx)
IE (1) IE76132B1 (xx)
NZ (1) NZ235123A (xx)
PL (2) PL165011B1 (xx)
RU (1) RU2106760C1 (xx)
SG (1) SG94672A1 (xx)

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US5272751A (en) * 1990-03-30 1993-12-21 Matsushita Electric Industrial Co., Ltd. Pay television
JPH0416084A (ja) * 1990-05-10 1992-01-21 Pioneer Electron Corp テレビジョン信号のスクランブル方法及び装置
US5161188A (en) * 1991-07-19 1992-11-03 Pires H George Scrambling video by horizontal and vertical time shifting
US5212723A (en) * 1991-08-08 1993-05-18 Macrovision Corp. Burst phase correction system for video descrambling
AU658014B2 (en) * 1991-11-19 1995-03-30 Macrovision Corporation Method and apparatus for scrambling and descrambling of video signals with edge fill
US5583936A (en) * 1993-05-17 1996-12-10 Macrovision Corporation Video copy protection process enhancement to introduce horizontal and vertical picture distortions
JPH0879030A (ja) * 1994-08-30 1996-03-22 Mitsubishi Electric Corp 高周波信号検出装置
JP2752912B2 (ja) * 1995-02-10 1998-05-18 福島日本電気株式会社 バースト信号検出回路
US5737417A (en) * 1995-04-24 1998-04-07 Technicolor Videocassette, Inc. Videotape anti-copying encryption scheme
CA2234971C (en) * 1995-10-17 2001-08-07 Macrovision Corporation Method and apparatus for removing or defeating effects of copy protection signals from a video signal
KR100489717B1 (ko) * 1996-05-29 2005-09-09 매크로비젼 코포레이션 압축호환가능한비디오스크램블링을위한방법및장치
NZ332288A (en) * 1996-05-29 2000-05-26 Macrovision Corp Method and apparatus for compression compatible video scrambling
ES2191844T3 (es) * 1996-05-29 2003-09-16 Macrovision Corp Metodo y aparato de marcaje de video compatible con la compresion.
JP3397975B2 (ja) * 1996-06-07 2003-04-21 三洋電機株式会社 ３次元映像のスクランブル方法
GB2319683A (en) * 1996-11-19 1998-05-27 Digi Media Vision Ltd Apparatus to decode an input video signal
US6590979B1 (en) 1997-05-29 2003-07-08 Macrovision Corporation Method and apparatus for compression compatible video scrambling
US6349139B1 (en) * 1997-06-17 2002-02-19 Macrovision Corporation Method and apparatus for minimizing chroma subcarrier instability caused by a video line scrambling system
US6424716B1 (en) * 1998-12-15 2002-07-23 Macrovision Corp. Method and apparatus for improved horizontal and vertical overlay signals for greater concealment in modern TV sets
WO2000042763A2 (en) 1999-01-15 2000-07-20 Macrovision Corporation Method and apparatus for scrambling a high definition television signal
US6950520B1 (en) 1999-01-26 2005-09-27 Macrovision Corporation Method and apparatus for carrying data in a video signal so that the data is not recorded
CN1282361C (zh) * 1999-02-25 2006-10-25 麦克罗维西恩公司 标记视频或音频信号的方法、视频或音频机顶盒和记录器
TW518497B (en) * 1999-03-30 2003-01-21 Sony Corp Information processing system
JP4787434B2 (ja) * 2001-08-24 2011-10-05 富士通コンポーネント株式会社 暗号化方法、通信システム、データ入力装置
WO2005010850A1 (ja) * 2003-07-14 2005-02-03 Sony Corporation 暗号/復号装置及び方法
EP2152000A1 (en) 2008-08-05 2010-02-10 Cabot Communications Ltd A method and apparatus for providing digital view protection by offsetting frames
JP2010193119A (ja) * 2009-02-18 2010-09-02 Oki Electric Ind Co Ltd 画像情報盗取の防止方法、及び、当該防止方法を実現するためのグラフィックコントローラ
PL71690Y1 (pl) * 2018-03-01 2020-12-14 Pit Radwar Spolka Akcyjna Łącznik obrotowy

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE3600326A1 (de) * 1985-01-09 1986-07-10 Debiopharm S.A., Lausanne Analyse- und erkennungsverfahren fuer verschluesselungscodes von fernsehsendungen sowie vorrichtung zur durchfuehrung des verfahrens
WO1986007226A1 (en) * 1985-05-21 1986-12-04 Scientific Atlanta, Inc. Method and apparatus for creating encrypted and decrypted television signals
EP0236833A2 (fr) * 1986-03-07 1987-09-16 Technical Developments And Investments Est. Procédé et dispositifs d'analyse et de reconnaissance automatique du code de cryptage d'émission de télévision

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US4563702A (en) * 1983-05-27 1986-01-07 M/A-Com Linkabit, Inc. Video signal scrambling and descrambling systems
US4594609A (en) * 1983-06-30 1986-06-10 Viewstar Inc. Scrambling system for television video signal
US4605961A (en) * 1983-12-22 1986-08-12 Frederiksen Jeffrey E Video transmission system using time-warp scrambling
US4598312A (en) * 1984-03-27 1986-07-01 Ortech Electronics Inc. Secure video distribution systems
US4742544A (en) * 1984-07-09 1988-05-03 Kupnicki Richard A Television transmission network with scrambling and descrambling
US4736420A (en) * 1986-09-19 1988-04-05 M/A-Com Government Systems, Inc. Video scrambling by segmenting video information lines
JPH0614740B2 (ja) * 1987-12-03 1994-02-23 日本ビクター株式会社 映像信号処理装置
JPH01186089A (ja) * 1988-01-20 1989-07-25 Victor Co Of Japan Ltd 映像信号処理装置
US4916736A (en) 1988-06-07 1990-04-10 Macrovision Corporation Method and apparatus for encrypting and decrypting time domain signals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3600326A1 (de) * 1985-01-09 1986-07-10 Debiopharm S.A., Lausanne Analyse- und erkennungsverfahren fuer verschluesselungscodes von fernsehsendungen sowie vorrichtung zur durchfuehrung des verfahrens
WO1986007226A1 (en) * 1985-05-21 1986-12-04 Scientific Atlanta, Inc. Method and apparatus for creating encrypted and decrypted television signals
EP0236833A2 (fr) * 1986-03-07 1987-09-16 Technical Developments And Investments Est. Procédé et dispositifs d'analyse et de reconnaissance automatique du code de cryptage d'émission de télévision

Also Published As

Publication number Publication date
BR9004419A (pt) 1991-09-10
US5058157A (en) 1991-10-15
USRE35078E (en) 1995-10-31
DE69028166T2 (de) 1997-04-03
DE69028166D1 (de) 1996-09-26
NZ235123A (en) 1993-03-26
RU2106760C1 (ru) 1998-03-10
KR910007367A (ko) 1991-04-30
DE416894T1 (de) 1991-11-28
AU628637B2 (en) 1992-09-17
EP0416894A3 (en) 1992-05-27
JPH03229589A (ja) 1991-10-11
JP3065642B2 (ja) 2000-07-17
IE76132B1 (en) 1997-10-08
CA2024641A1 (en) 1991-03-07
EP0416894B1 (en) 1996-08-21
PL165348B1 (pl) 1994-12-30
PL165011B1 (pl) 1994-10-31
CA2024641C (en) 2000-12-05
ES2023786T3 (es) 1996-11-16
CN1020233C (zh) 1993-03-31
IE903228A1 (en) 1991-03-13
ES2023786A4 (es) 1992-02-16
EP0416894A2 (en) 1991-03-13
AU6201290A (en) 1991-03-14
CN1051650A (zh) 1991-05-22
KR0144343B1 (ko) 1998-07-15

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