HK89897A - A system for controlling the recording of a copy protected video signal - Google Patents
A system for controlling the recording of a copy protected video signalInfo
- Publication number
- HK89897A HK89897A HK89897A HK89897A HK89897A HK 89897 A HK89897 A HK 89897A HK 89897 A HK89897 A HK 89897A HK 89897 A HK89897 A HK 89897A HK 89897 A HK89897 A HK 89897A
- Authority
- HK
- Hong Kong
- Prior art keywords
- recording
- controlling
- video signal
- copy protected
- protected video
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- 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
- H04N7/171—Systems operating in the amplitude domain of the television signal
- H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals
-
- 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
- H04N2005/91314—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 pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Security & Cryptography (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910006341A KR930006520B1 (ko) | 1991-04-19 | 1991-04-19 | 복사방지 시스템 |
Publications (1)
Publication Number | Publication Date |
---|---|
HK89897A true HK89897A (en) | 1997-08-01 |
Family
ID=19313491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK89897A HK89897A (en) | 1991-04-19 | 1997-06-26 | A system for controlling the recording of a copy protected video signal |
Country Status (7)
Country | Link |
---|---|
US (1) | US5208708A (zh) |
JP (1) | JP2524036B2 (zh) |
KR (1) | KR930006520B1 (zh) |
DE (1) | DE4134842C2 (zh) |
FR (1) | FR2675652A1 (zh) |
GB (1) | GB2254952B (zh) |
HK (1) | HK89897A (zh) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2959413B2 (ja) * | 1994-09-29 | 1999-10-06 | 日本ビクター株式会社 | ダビング装置 |
US5737417A (en) * | 1995-04-24 | 1998-04-07 | Technicolor Videocassette, Inc. | Videotape anti-copying encryption scheme |
ATE208113T1 (de) * | 1995-09-01 | 2001-11-15 | Sony Corp | Datenaufzeichnung mit kopierschutz |
JPH1021144A (ja) | 1996-07-03 | 1998-01-23 | Hitachi Ltd | ディジタル著作物配布システム及び不正な複製物の検出方法 |
JPH10149622A (ja) * | 1996-11-18 | 1998-06-02 | Sony Corp | 情報複製防止方法および情報複製防止装置 |
KR100505594B1 (ko) * | 1998-02-16 | 2005-10-19 | 삼성전자주식회사 | 영상신호의 복사방지 신호 검출장치 및 이를 이용한 영상처리씨스템 |
JP2000069415A (ja) | 1998-08-18 | 2000-03-03 | Fujitsu Ltd | 画像制御回路、画像制御方法、又は、画像制御方法をコンピュータシステムに実行させるためのプログラムを記憶したコンピュータ読み取り可能な媒体 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4336554A (en) * | 1980-06-23 | 1982-06-22 | Clarion Co., Ltd. | Code signal blanking apparatus |
GB2104701B (en) * | 1981-08-06 | 1985-06-05 | James Bertram King | Method and apparatus for preventing unauthorised recording of source material (eg, a gramophone recording) |
US4631603A (en) * | 1985-04-17 | 1986-12-23 | Macrovision | Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof |
JPH0743825B2 (ja) * | 1985-12-04 | 1995-05-15 | ソニー株式会社 | ダビング方式 |
US4907093A (en) * | 1986-08-11 | 1990-03-06 | Macrovision Corporation | Method and apparatus for preventing the copying of a video program |
KR930008167B1 (ko) * | 1986-08-11 | 1993-08-26 | 매크로비젼 코포레이션 | 비데오 레코더의 비데오 디스에이블링 회로를 이용하여 비데오 프로그램의 복사를 방지하는 방법 및 장치 |
US4937679A (en) * | 1986-08-11 | 1990-06-26 | Macrovision | Dual deck video recording apparatus having enhanced copy protection and method for providing enhanced copy protection to such a recording apparatus |
JPH0292079A (ja) * | 1988-09-29 | 1990-03-30 | Toshiba Corp | 映像信号のダビング装置 |
JPH03167979A (ja) * | 1989-11-28 | 1991-07-19 | Hitachi Ltd | 磁気記録再生装置 |
-
1991
- 1991-04-19 KR KR1019910006341A patent/KR930006520B1/ko not_active IP Right Cessation
- 1991-10-22 DE DE4134842A patent/DE4134842C2/de not_active Expired - Fee Related
- 1991-10-22 US US07/779,196 patent/US5208708A/en not_active Expired - Lifetime
- 1991-10-28 FR FR9113270A patent/FR2675652A1/fr active Granted
- 1991-10-28 GB GB9122826A patent/GB2254952B/en not_active Expired - Fee Related
- 1991-11-15 JP JP3300648A patent/JP2524036B2/ja not_active Expired - Fee Related
-
1997
- 1997-06-26 HK HK89897A patent/HK89897A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2254952A (en) | 1992-10-21 |
FR2675652B1 (zh) | 1995-03-03 |
US5208708A (en) | 1993-05-04 |
DE4134842C2 (de) | 1994-05-05 |
KR920020470A (ko) | 1992-11-21 |
DE4134842A1 (de) | 1992-10-22 |
FR2675652A1 (fr) | 1992-10-23 |
GB2254952B (en) | 1995-02-15 |
GB9122826D0 (en) | 1991-12-11 |
JPH04325964A (ja) | 1992-11-16 |
JP2524036B2 (ja) | 1996-08-14 |
KR930006520B1 (ko) | 1993-07-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20081028 |