SG94672A1 - Method and apparatus for encrypting and decrypting time domain signals - Google Patents
Method and apparatus for encrypting and decrypting time domain signalsInfo
- 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
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)
- Television Signal Processing For Recording (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
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 (zh) |
EP (1) | EP0416894B1 (zh) |
JP (1) | JP3065642B2 (zh) |
KR (1) | KR0144343B1 (zh) |
CN (1) | CN1020233C (zh) |
AU (1) | AU628637B2 (zh) |
BR (1) | BR9004419A (zh) |
CA (1) | CA2024641C (zh) |
DE (2) | DE416894T1 (zh) |
ES (1) | ES2023786T3 (zh) |
IE (1) | IE76132B1 (zh) |
NZ (1) | NZ235123A (zh) |
PL (2) | PL165348B1 (zh) |
RU (1) | RU2106760C1 (zh) |
SG (1) | SG94672A1 (zh) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE69635555T2 (de) * | 1995-10-17 | 2006-07-13 | Macrovision Corp., Santa Clara | Verfahren und vorrichtung zur entfernung oder unterdrückung von kopierschutzsignaleffekten von/in einem videosignal |
KR100489717B1 (ko) * | 1996-05-29 | 2005-09-09 | 매크로비젼 코포레이션 | 압축호환가능한비디오스크램블링을위한방법및장치 |
AU714103B2 (en) * | 1996-05-29 | 1999-12-16 | Rovi Solutions Corporation | Method and apparatus for compression compatible video fingerprinting |
DK0940039T3 (da) * | 1996-05-29 | 2003-12-01 | Macrovision Corp | Fremgangsmåde og apparatur til kompressionskompatibel videoforvrængning |
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 |
EP1142296B1 (en) * | 1999-01-15 | 2012-05-09 | Rovi Solutions 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 |
BR0008456A (pt) * | 1999-02-25 | 2002-01-29 | Macrovision Corp | Método e aparelho para serviços melhorados de áudio/vìdeo com marcas d'água e dados associados |
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 |
CN100559425C (zh) * | 2003-07-14 | 2009-11-11 | 索尼株式会社 | 加密设备、加密方法、解密设备和解密方法 |
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)
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 |
Family Cites Families (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US2758153A (en) * | 1951-08-22 | 1956-08-07 | Zenith Radio Corp | Subscription television system |
US2910526A (en) * | 1953-07-24 | 1959-10-27 | Zenith Radio Corp | Secrecy communication system |
US2857455A (en) * | 1953-12-01 | 1958-10-21 | Rca Corp | Subscription color television system |
US3106604A (en) * | 1955-01-12 | 1963-10-08 | Skiatron Elect & Tele | Multiple code subscription television system |
US2972008A (en) * | 1956-04-23 | 1961-02-14 | Paramount Pictures Corp | Coding methods and system |
US3140346A (en) * | 1962-01-30 | 1964-07-07 | Zenith Radio Corp | Communication receiver |
US3147061A (en) * | 1962-01-30 | 1964-09-01 | Zenith Radio Corp | Subscriber communication receiver |
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 |
US4600942A (en) * | 1982-07-29 | 1986-07-15 | Telease, Inc. | Secure coding and decoding system and method for television program signals |
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 |
DE3479952D1 (en) * | 1983-04-21 | 1989-11-02 | Gen Instrument Corp | 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 |
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 |
-
1989
- 1989-09-06 US US07/403,514 patent/US5058157A/en not_active Ceased
-
1990
- 1990-08-31 AU AU62012/90A patent/AU628637B2/en not_active Expired
- 1990-08-31 NZ NZ235123A patent/NZ235123A/xx unknown
- 1990-09-05 ES ES90309714T patent/ES2023786T3/es not_active Expired - Lifetime
- 1990-09-05 DE DE199090309714T patent/DE416894T1/de active Pending
- 1990-09-05 IE IE322890A patent/IE76132B1/en not_active IP Right Cessation
- 1990-09-05 BR BR909004419A patent/BR9004419A/pt not_active IP Right Cessation
- 1990-09-05 EP EP90309714A patent/EP0416894B1/en not_active Expired - Lifetime
- 1990-09-05 CA CA002024641A patent/CA2024641C/en not_active Expired - Lifetime
- 1990-09-05 RU SU4831060A patent/RU2106760C1/ru active
- 1990-09-05 SG SG9600630A patent/SG94672A1/en unknown
- 1990-09-05 DE DE69028166T patent/DE69028166T2/de not_active Expired - Lifetime
- 1990-09-06 PL PL90300329A patent/PL165348B1/pl unknown
- 1990-09-06 PL PL90286768A patent/PL165011B1/pl unknown
- 1990-09-06 KR KR1019900014043A patent/KR0144343B1/ko not_active IP Right Cessation
- 1990-09-06 JP JP2236926A patent/JP3065642B2/ja not_active Expired - Fee Related
- 1990-09-06 CN CN90107477A patent/CN1020233C/zh not_active Expired - Lifetime
-
1993
- 1993-10-15 US US08/137,582 patent/USRE35078E/en not_active Expired - Lifetime
Patent Citations (3)
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 |
---|---|
JP3065642B2 (ja) | 2000-07-17 |
EP0416894A2 (en) | 1991-03-13 |
CN1051650A (zh) | 1991-05-22 |
CA2024641A1 (en) | 1991-03-07 |
RU2106760C1 (ru) | 1998-03-10 |
CA2024641C (en) | 2000-12-05 |
DE69028166T2 (de) | 1997-04-03 |
EP0416894A3 (en) | 1992-05-27 |
JPH03229589A (ja) | 1991-10-11 |
KR910007367A (ko) | 1991-04-30 |
USRE35078E (en) | 1995-10-31 |
EP0416894B1 (en) | 1996-08-21 |
NZ235123A (en) | 1993-03-26 |
IE76132B1 (en) | 1997-10-08 |
PL165348B1 (pl) | 1994-12-30 |
ES2023786T3 (es) | 1996-11-16 |
DE69028166D1 (de) | 1996-09-26 |
KR0144343B1 (ko) | 1998-07-15 |
IE903228A1 (en) | 1991-03-13 |
DE416894T1 (de) | 1991-11-28 |
US5058157A (en) | 1991-10-15 |
ES2023786A4 (es) | 1992-02-16 |
AU628637B2 (en) | 1992-09-17 |
PL165011B1 (pl) | 1994-10-31 |
BR9004419A (pt) | 1991-09-10 |
CN1020233C (zh) | 1993-03-31 |
AU6201290A (en) | 1991-03-14 |
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