DE8812594U1 - - Google Patents

Info

Publication number
DE8812594U1
DE8812594U1 DE19888812594 DE8812594U DE8812594U1 DE 8812594 U1 DE8812594 U1 DE 8812594U1 DE 19888812594 DE19888812594 DE 19888812594 DE 8812594 U DE8812594 U DE 8812594U DE 8812594 U1 DE8812594 U1 DE 8812594U1
Authority
DE
Grant status
Grant
Patent type
Legal status (The legal status 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 status listed.)
Expired
Application number
DE19888812594
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ELLERBROK INGRID 1000 BERLIN DE
Original Assignee
ELLERBROK INGRID 1000 BERLIN DE
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
Grant date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/913Television signal processing therefor for scrambling ; for copy protection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/913Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91314Television 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
DE19888812594 1988-10-04 1988-10-04 Expired DE8812594U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19888812594 DE8812594U1 (en) 1988-10-04 1988-10-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19888812594 DE8812594U1 (en) 1988-10-04 1988-10-04

Publications (1)

Publication Number Publication Date
DE8812594U1 true DE8812594U1 (en) 1988-11-24

Family

ID=6828624

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19888812594 Expired DE8812594U1 (en) 1988-10-04 1988-10-04

Country Status (1)

Country Link
DE (1) DE8812594U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027406A2 (en) * 1993-05-17 1994-11-24 Macrovision Corporation Video copy protection process enhancement to introduce horizontal and vertical picture distortions
DE29713849U1 (en) * 1997-07-25 1997-10-02 Ellerbrok Ingrid copy decoder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1571028A (en) * 1976-03-23 1980-07-09 Sony Corp Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
GB2086641A (en) * 1980-10-27 1982-05-12 Victor Company Of Japan Copy-proof recording medium and device for adding copy-proof interference signal
EP0124043A1 (en) * 1983-04-25 1984-11-07 Chiyuki Kano Apparatus for dubbing videotape
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
EP0084241B1 (en) * 1982-01-18 1987-07-29 Shinano Kikaku Kabushiki Kaisha Signal processing device and method for video tape recording
GB2195510A (en) * 1986-03-04 1988-04-07 Macrovision Corp Removing pseudo-sync and/or agc pulses from video systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1571028A (en) * 1976-03-23 1980-07-09 Sony Corp Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
GB2086641A (en) * 1980-10-27 1982-05-12 Victor Company Of Japan Copy-proof recording medium and device for adding copy-proof interference signal
EP0084241B1 (en) * 1982-01-18 1987-07-29 Shinano Kikaku Kabushiki Kaisha Signal processing device and method for video tape recording
EP0124043A1 (en) * 1983-04-25 1984-11-07 Chiyuki Kano Apparatus for dubbing videotape
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
GB2195510A (en) * 1986-03-04 1988-04-07 Macrovision Corp Removing pseudo-sync and/or agc pulses from video systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WARNKE, Fred: VCR-Kopierschutz. In: Funkschau, H. 15, 1988, S. 56,57 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027406A2 (en) * 1993-05-17 1994-11-24 Macrovision Corporation Video copy protection process enhancement to introduce horizontal and vertical picture distortions
WO1994027406A3 (en) * 1993-05-17 1995-01-19 Macrovision Corp Video copy protection process enhancement to introduce horizontal and vertical picture distortions
US5583936A (en) * 1993-05-17 1996-12-10 Macrovision Corporation Video copy protection process enhancement to introduce horizontal and vertical picture distortions
US7492896B2 (en) 1993-05-17 2009-02-17 Macrovision Corporation Copy protection for video signal using added negative amplitude pulse
EP0923241A2 (en) * 1993-05-17 1999-06-16 Macrovision Corporation Method and apparatus for defeating the effects of a video anti-copy process
EP0923241A3 (en) * 1993-05-17 1999-06-23 Macrovision Corporation Method and apparatus for defeating the effects of a video anti-copy process
US6501842B2 (en) 1993-05-17 2002-12-31 Macrovision Corporation Method and apparatus for modifying a video signal by back porch lowering
US7085380B2 (en) 1993-05-17 2006-08-01 Macrovision Corporation Method for modifying a copy protected video signal with a negative amplitude pulse
US7352863B2 (en) 1993-05-17 2008-04-01 Macrovision Corporation Copy protection for video signal using narrowed horizontal synchronization signals and amplitude modulation
US7620178B2 (en) 1993-05-17 2009-11-17 Macrovision Corporation Copy protection for video signal added pulses
US7706533B2 (en) 1993-05-17 2010-04-27 Macrovision Corporation Copy protection for video signal using narrowed horizontal synchronization signals
DE29713849U1 (en) * 1997-07-25 1997-10-02 Ellerbrok Ingrid copy decoder

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