ES8801971A1 - Procedimiento para la obtencion de portadores magneticos de grabaciones de video no copiables. - Google Patents
Procedimiento para la obtencion de portadores magneticos de grabaciones de video no copiables.Info
- Publication number
- ES8801971A1 ES8801971A1 ES549440A ES549440A ES8801971A1 ES 8801971 A1 ES8801971 A1 ES 8801971A1 ES 549440 A ES549440 A ES 549440A ES 549440 A ES549440 A ES 549440A ES 8801971 A1 ES8801971 A1 ES 8801971A1
- Authority
- ES
- Spain
- Prior art keywords
- video signal
- magnetic recording
- copy
- procedure
- video signals
- Prior art date
- 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
-
- 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
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
- G11B20/00818—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals
- G11B20/00826—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals wherein a spoiler signal is added to degrade the signal quality
-
- 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
- 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
-
- 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
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91371—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video color burst signal being modified
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)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PROCEDIMIENTO PARA LA OBTENCION DE PORTADORES MAGNETICOS DE GRABACIONES DE VIDEO, NO COPIABLES. PORTADORES MAGNETICOS DE GRABACIONES, PROTEGIDOS CONTRA LA COPIA POR MODIFICACION DE UNA SEÑAL DE VIDEO DE UN ELEMENTO MAZ, EN EL QUE SE INFLUENCIAN PARAMETROS DE LA SEÑAL DE VIDEO X(T), QUE IMPRIMEN SOBRE EL PORTADOR DE GRABACION (13) POR MEDIO DE FUNCIONES DE PUESTA EN ESCALA K(T) DE TAL FORMA QUE EN EL MOMENTO DE UNA PRIMERA REPRODUCCION DE LA SEÑAL DE VIDEO IMPRESA SOBRE EL PORTADOR DE GRABACIONES (13), SE GENERA UNA SEÑAL W1(T) DE PRIMERA COPIA CONSIDERADA COMO CORRECTA.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843443857 DE3443857A1 (de) | 1984-11-30 | 1984-11-30 | Verfahren zur herstellung von kopiergeschuetzten magnetischen aufzeichnungstraegern |
Publications (2)
Publication Number | Publication Date |
---|---|
ES549440A0 ES549440A0 (es) | 1988-03-01 |
ES8801971A1 true ES8801971A1 (es) | 1988-03-01 |
Family
ID=6251649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES549440A Expired ES8801971A1 (es) | 1984-11-30 | 1985-11-29 | Procedimiento para la obtencion de portadores magneticos de grabaciones de video no copiables. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0189548A1 (es) |
JP (1) | JPS61269472A (es) |
DE (1) | DE3443857A1 (es) |
ES (1) | ES8801971A1 (es) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL9000951A (nl) * | 1990-04-20 | 1991-11-18 | Copyguard Enterprises | Werkwijze en toestel voor het verhinderen van het onrechtmatig op band overnemen van beeldsignalen. |
GB2267598B (en) * | 1992-06-01 | 1995-09-13 | Macrovision Uk Limited | Improvements in or relating to detecting copied video recordings |
AU708661B2 (en) * | 1993-05-17 | 1999-08-12 | Rovi Solutions Corporation | 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 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52114313A (en) * | 1976-03-23 | 1977-09-26 | Sony Corp | Recorded medium and production method therefor |
DE2924453A1 (de) * | 1979-06-18 | 1981-01-15 | Walter Ing Grad Breu | Verfahren und einrichtung zur herstellung kopiersicher bespielter videokassetten |
-
1984
- 1984-11-30 DE DE19843443857 patent/DE3443857A1/de not_active Withdrawn
-
1985
- 1985-11-28 EP EP85115099A patent/EP0189548A1/de not_active Withdrawn
- 1985-11-29 JP JP60269193A patent/JPS61269472A/ja active Pending
- 1985-11-29 ES ES549440A patent/ES8801971A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61269472A (ja) | 1986-11-28 |
EP0189548A1 (de) | 1986-08-06 |
DE3443857A1 (de) | 1986-06-05 |
ES549440A0 (es) | 1988-03-01 |
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