DE8812594U1 - - Google Patents
Info
- Publication number
- DE8812594U1 DE8812594U1 DE8812594U DE8812594U DE8812594U1 DE 8812594 U1 DE8812594 U1 DE 8812594U1 DE 8812594 U DE8812594 U DE 8812594U DE 8812594 U DE8812594 U DE 8812594U DE 8812594 U1 DE8812594 U1 DE 8812594U1
- Authority
- DE
- Germany
- 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
Links
Classifications
-
- 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
-
- 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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8812594U DE8812594U1 (es) | 1988-10-04 | 1988-10-04 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8812594U DE8812594U1 (es) | 1988-10-04 | 1988-10-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE8812594U1 true DE8812594U1 (es) | 1988-11-24 |
Family
ID=6828624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8812594U Expired DE8812594U1 (es) | 1988-10-04 | 1988-10-04 |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE8812594U1 (es) |
Cited By (2)
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 (de) * | 1997-07-25 | 1997-10-02 | Ellerbrok Ingrid | Kopierschutzdecoder |
Citations (6)
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 |
-
1988
- 1988-10-04 DE DE8812594U patent/DE8812594U1/de not_active Expired
Patent Citations (6)
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)
Title |
---|
WARNKE, Fred: VCR-Kopierschutz. In: Funkschau, H. 15, 1988, S. 56,57 * |
Cited By (12)
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 |
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 |
US7492896B2 (en) | 1993-05-17 | 2009-02-17 | Macrovision Corporation | Copy protection for video signal using added negative amplitude pulse |
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 (de) * | 1997-07-25 | 1997-10-02 | Ellerbrok Ingrid | Kopierschutzdecoder |