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 signal Download PDF

Info

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
signal
pulse
circuit
killer
generating
Prior art date
Application number
HK89897A
Other languages
English (en)
Inventor
Mok Do-Sang
Original Assignee
Samsung Electronics Co Limited
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 Samsung Electronics Co Limited filed Critical Samsung Electronics Co Limited
Publication of HK89897A publication Critical patent/HK89897A/xx

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)
HK89897A 1991-04-19 1997-06-26 A system for controlling the recording of a copy protected video signal HK89897A (en)

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 (enExample)
JP (1) JP2524036B2 (enExample)
KR (1) KR930006520B1 (enExample)
DE (1) DE4134842C2 (enExample)
FR (1) FR2675652A1 (enExample)
GB (1) GB2254952B (enExample)
HK (1) HK89897A (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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
US5991499A (en) * 1995-09-01 1999-11-23 Sony Corporation Data recording apparatus and method for preventing illegal copying
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
CN100490519C (zh) * 2005-11-10 2009-05-20 凌阳科技股份有限公司 影像信号处理装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US5208708A (en) 1993-05-04
JPH04325964A (ja) 1992-11-16
DE4134842A1 (de) 1992-10-22
GB2254952B (en) 1995-02-15
KR930006520B1 (ko) 1993-07-16
GB9122826D0 (en) 1991-12-11
GB2254952A (en) 1992-10-21
DE4134842C2 (de) 1994-05-05
KR920020470A (ko) 1992-11-21
FR2675652B1 (enExample) 1995-03-03
JP2524036B2 (ja) 1996-08-14
FR2675652A1 (fr) 1992-10-23

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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