BR9004419A - Processo e sistema para decifrar sinais de informacao previamente cifrados - Google Patents

Processo e sistema para decifrar sinais de informacao previamente cifrados

Info

Publication number
BR9004419A
BR9004419A BR909004419A BR9004419A BR9004419A BR 9004419 A BR9004419 A BR 9004419A BR 909004419 A BR909004419 A BR 909004419A BR 9004419 A BR9004419 A BR 9004419A BR 9004419 A BR9004419 A BR 9004419A
Authority
BR
Brazil
Prior art keywords
deciphering
encrypted information
previously encrypted
information signs
signs
Prior art date
Application number
BR909004419A
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 BR9004419A publication Critical patent/BR9004419A/pt

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
BR909004419A 1989-09-06 1990-09-05 Processo e sistema para decifrar sinais de informacao previamente cifrados BR9004419A (pt)

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
BR9004419A true BR9004419A (pt) 1991-09-10

Family

ID=23596059

Family Applications (1)

Application Number Title Priority Date Filing Date
BR909004419A BR9004419A (pt) 1989-09-06 1990-09-05 Processo e sistema para decifrar sinais de informacao previamente cifrados

Country Status (15)

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

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USRE40689E1 (en) * 1983-11-23 2009-03-31 Macrovision Corporation Method and apparatus for disabling anti-copy protection system in video signals
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
NZ321300A (en) * 1995-10-17 1998-08-26 Macrovision Corp Method and apparatus for removing or defeating copy protection signal effects from a video signal
WO1997046018A1 (en) * 1996-05-29 1997-12-04 Macrovision Corporation Method and apparatus for compression compatible video scrambling
KR100489717B1 (ko) * 1996-05-29 2005-09-09 매크로비젼 코포레이션 압축호환가능한비디오스크램블링을위한방법및장치
PT900498E (pt) * 1996-05-29 2003-06-30 Macrovision Corp Metodo e aparelho para identificacao de video compativel de compressao
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
JP3961221B2 (ja) 1999-01-15 2007-08-22 マクロビジョン・コーポレーション 高精細テレビジョン信号のスクランブリング方法及び装置
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
NZ526832A (en) * 1999-02-25 2004-11-26 Macrovision Corp Method and apparatus for enhanced audio/video services with watermarks and associated data
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
EP1646022A4 (en) * 2003-07-14 2010-09-08 Sony Corp METHOD AND DEVICE FOR ENCRYPTION AND DECRYPTION
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

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US2547598A (en) * 1947-09-13 1951-04-03 Zenith Radio Corp Subscription image transmission system and apparatus
US2619530A (en) * 1949-11-19 1952-11-25 Zenith Radio Corp Control system for subscription type television receivers
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US2910526A (en) * 1953-07-24 1959-10-27 Zenith Radio Corp Secrecy communication system
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US3538243A (en) * 1965-09-23 1970-11-03 Skiatron Elect & Tele Subscription television system
US3732355A (en) * 1971-10-22 1973-05-08 Zenith Radio Corp Inhibitable random pulse generator
CA1097794A (en) * 1975-08-08 1981-03-17 Harold B. Shutterly Secure television transmission system
US4216500A (en) * 1978-11-13 1980-08-05 St Louis Raymond F Encoding and decoding system
JPS5811150B2 (ja) * 1978-11-18 1983-03-01 クラリオン株式会社 テレビ信号識別装置
US4353088A (en) * 1980-05-14 1982-10-05 Oak Industries, Inc. Coding and decoding system for video and audio signals
US4403252A (en) * 1980-05-27 1983-09-06 R F Monolithics, Inc. Television scrambling and unscrambling method and apparatus
US4405942A (en) * 1981-02-25 1983-09-20 Telease, Inc. Method and system for secure transmission and reception of video information, particularly for television
CA1153103A (en) * 1981-03-19 1983-08-30 Northern Telecom Limited Scrambling and unscrambling video signals in a pay tv system
AU562395B2 (en) * 1981-09-10 1987-06-11 Sony Corporation Subscription television system
US4466017A (en) * 1981-12-23 1984-08-14 Scientific-Atlanta, Inc. Sync suppression scrambling of television signals for subscription TV
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US4568974A (en) * 1982-10-28 1986-02-04 Oak Industries Inc. Video scrambling by the application of a variable periodic scrambling waveform
US4575754A (en) * 1983-01-06 1986-03-11 Rca Corporation Video scrambler system
EP0123505B1 (en) * 1983-04-21 1989-09-27 General Instrument Corporation Scrambling system for television video signal
US4547802A (en) * 1983-04-29 1985-10-15 Westinghouse Electric Corp. TV Scrambler/descrambler using serial memories
US4604650A (en) * 1983-05-17 1986-08-05 Westinghouse Electric Corp. Three line video scrambling method
US4563702A (en) * 1983-05-27 1986-01-07 M/A-Com Linkabit, Inc. Video signal scrambling and descrambling systems
US4642688A (en) * 1983-06-24 1987-02-10 Scientific Atlanta, Inc. Method and apparatus for creating encrypted and decrypted television signals
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
BE903993A (fr) * 1985-01-09 1986-05-02 Technical Developments And Inv Procedes et dispositifs d'analyse et de reconnaissance du code de cryptage d'emissions de television.
CH666775A5 (fr) * 1986-03-07 1988-08-15 T D I Technical Developments A Procede et dispositifs d'analyse et de reconnaissance automatique du code de cryptage d'emissions de television.
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

Also Published As

Publication number Publication date
EP0416894A2 (en) 1991-03-13
JPH03229589A (ja) 1991-10-11
KR910007367A (ko) 1991-04-30
NZ235123A (en) 1993-03-26
ES2023786T3 (es) 1996-11-16
KR0144343B1 (ko) 1998-07-15
CN1020233C (zh) 1993-03-31
US5058157A (en) 1991-10-15
CN1051650A (zh) 1991-05-22
PL165348B1 (pl) 1994-12-30
DE69028166D1 (de) 1996-09-26
USRE35078E (en) 1995-10-31
SG94672A1 (en) 2003-03-18
CA2024641C (en) 2000-12-05
AU6201290A (en) 1991-03-14
IE76132B1 (en) 1997-10-08
CA2024641A1 (en) 1991-03-07
EP0416894A3 (en) 1992-05-27
JP3065642B2 (ja) 2000-07-17
PL165011B1 (pl) 1994-10-31
EP0416894B1 (en) 1996-08-21
DE416894T1 (de) 1991-11-28
IE903228A1 (en) 1991-03-13
AU628637B2 (en) 1992-09-17
ES2023786A4 (es) 1992-02-16
DE69028166T2 (de) 1997-04-03
RU2106760C1 (ru) 1998-03-10

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Legal Events

Date Code Title Description
FF Decision: intention to grant
KD Notifcation of receipt (letter patent)
FG Letter patent granted
B21A Expiry acc. art. 78, item i of ipl- expiry of the term of protection

Free format text: PATENTE EXTINTA EM 05/09/2005