ES2091747T3 - Procedimiento de proteccion contra copia de una cinta de video pregrabada. - Google Patents

Procedimiento de proteccion contra copia de una cinta de video pregrabada.

Info

Publication number
ES2091747T3
ES2091747T3 ES88112128T ES88112128T ES2091747T3 ES 2091747 T3 ES2091747 T3 ES 2091747T3 ES 88112128 T ES88112128 T ES 88112128T ES 88112128 T ES88112128 T ES 88112128T ES 2091747 T3 ES2091747 T3 ES 2091747T3
Authority
ES
Spain
Prior art keywords
synchronizing signal
vertical synchronizing
pulses
equalizing
partition
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 - Lifetime
Application number
ES88112128T
Other languages
English (en)
Inventor
Yasunori Takahashi
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.)
Scitec Corp
Original Assignee
Scitec Corp
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
Priority claimed from JP62187683A external-priority patent/JP2533330B2/ja
Priority claimed from JP63129479A external-priority patent/JP2542905B2/ja
Application filed by Scitec Corp filed Critical Scitec Corp
Application granted granted Critical
Publication of ES2091747T3 publication Critical patent/ES2091747T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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

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)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

SISTEMA DE PROTECCION CONTRA LAS COPIAS PARA CINTAS DE VIDEO PREGRABADAS. EL INVENTO INCLUYE TANTO UN METODO PARA PROTEGER LA CINTA COMO UN ESTUCHE PROTEGIDO. LA PROTECCION FRENTE A LAS COPIAS SE OBTIENE GRABANDO EN AL MENOS UNA PARTE DE LA CINTA ORIGINAL UNA SEÑAL COMPUESTA DE SINCRONIZACION QUE INCLUYE UN IMPULSO VERTICAL DE SINCRONIZACION CUYA LONGITUD ESTA ENTRE 20 Y 1 MICROSEGUNDOS Y CUYA AMPLITUD ES DISCERNIBLE POR UN CIRCUITO SEPARADOR DE LA SEÑAL DE SINCRONIZACION VERTICAL DEL RECEPTOR DE TELEVISION. TODOS LOS DEMAS IMPULSOS DE SINCRONIZACION VERTICAL EN LA PARTICION DE LA SEÑAL DE SINCRONIZACION VERTICAL, TODOS LOS IMPULSOS DE IGUALACION EN UNA PARTICION DE SEÑAL DE IGUALACION TRAS LA PARTICION DE SEÑAL DE SINCRONIZACION VERTICAL Y AL MENOS PARTE DE LOS IMPULSOS DE SINCRONIZACION HORIZONTAL EN UNA PARTICION DE SEÑAL DE SINCRONIZACION HORIZONTAL TRAS LA PARTICION DE LA SEÑAL DE IGUALACION EN LA SEÑAL DE SINCRONIZACION COMPUESTA TIENEN UNA AMPLITUD DE IMPULSO RESPECTIVA MENOR QUE UNNIVEL DE PEDESTAL DETERMINADO DE LAS SEÑALES DE SINCRONIZACION.
ES88112128T 1987-07-29 1988-07-27 Procedimiento de proteccion contra copia de una cinta de video pregrabada. Expired - Lifetime ES2091747T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62187683A JP2533330B2 (ja) 1987-07-29 1987-07-29 複製防止録画済ビデオテ―プ
JP63129479A JP2542905B2 (ja) 1988-05-28 1988-05-28 複製防止録画済ビデオテ―プ

Publications (1)

Publication Number Publication Date
ES2091747T3 true ES2091747T3 (es) 1996-11-16

Family

ID=26464853

Family Applications (1)

Application Number Title Priority Date Filing Date
ES88112128T Expired - Lifetime ES2091747T3 (es) 1987-07-29 1988-07-27 Procedimiento de proteccion contra copia de una cinta de video pregrabada.

Country Status (10)

Country Link
US (1) US5179452A (es)
EP (1) EP0301504B1 (es)
KR (1) KR890002869A (es)
AT (1) ATE143557T1 (es)
AU (1) AU624334B2 (es)
BR (1) BR8803793A (es)
CA (1) CA1337496C (es)
DE (1) DE3855568T2 (es)
ES (1) ES2091747T3 (es)
GB (1) GB2207797B (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE40689E1 (en) * 1983-11-23 2009-03-31 Macrovision Corporation Method and apparatus for disabling anti-copy protection system in video signals
ATE143557T1 (de) * 1987-07-29 1996-10-15 Scitec Corp Methode für den kopierschutz eines vorbespielten videobandes
NL9000951A (nl) * 1990-04-20 1991-11-18 Copyguard Enterprises Werkwijze en toestel voor het verhinderen van het onrechtmatig op band overnemen van beeldsignalen.
JP3250333B2 (ja) * 1993-04-02 2002-01-28 ソニー株式会社 映像信号処理方法、映像信号記録方法、映像信号再生方法、映像信号処理装置、映像信号記録装置及び映像信号再生装置
JP2959413B2 (ja) * 1994-09-29 1999-10-06 日本ビクター株式会社 ダビング装置
MX9707725A (es) * 1995-04-07 1997-12-31 Trevor Franklin Metodo y aparto para tratar una señal de video.
US5737417A (en) * 1995-04-24 1998-04-07 Technicolor Videocassette, Inc. Videotape anti-copying encryption scheme
JP4355819B2 (ja) * 1995-10-17 2009-11-04 マクロヴィジョン コーポレイション 複製保護信号の影響を除去または低減、もしくはパルス位置決定する方法または装置
US6011765A (en) * 1996-04-12 2000-01-04 Sony Corporation Recording medium having copying protection signals recorded in superposition on main signals
US6285774B1 (en) 1998-06-08 2001-09-04 Digital Video Express, L.P. System and methodology for tracing to a source of unauthorized copying of prerecorded proprietary material, such as movies
US7599604B2 (en) * 2001-12-14 2009-10-06 Thomson Licensing Asynchronous copy protection detector
US7376337B2 (en) * 2002-09-30 2008-05-20 Matsushita Electric Industrial Co., Ltd. Video signal recording apparatus for copyrighted works
US7668099B2 (en) * 2003-06-13 2010-02-23 Apple Inc. Synthesis of vertical blanking signal

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801732A (en) * 1971-11-22 1974-04-02 J Reeves Method and apparatus for scrambled television
US3963865A (en) * 1975-06-04 1976-06-15 Trans-American Video, Inc. Anti-piracy method and system
JPS6052625B2 (ja) * 1976-03-22 1985-11-20 ソニー株式会社 記録済記録媒体及びその作製方法
JPS52130314A (en) * 1976-04-24 1977-11-01 Masamichi Kishi Video tape for deleting copy thereof
JPS54108612A (en) * 1978-02-14 1979-08-25 Matsushita Electric Ind Co Ltd Reproduction preventing system of recorded video tapes
US4213149A (en) * 1978-12-26 1980-07-15 Janko Mike A Apparatus for preventing video tape duplication
AU5706180A (en) * 1979-04-11 1980-10-16 John Anthony Dimmers Video copying inhibitor
GB2055501A (en) * 1979-08-03 1981-03-04 Ivs Uk Ltd Video tape recording apparatus
JPS60137190A (ja) * 1983-12-26 1985-07-20 Pioneer Electronic Corp Ｃａｔｖシステムにおけるスクランブル・デスクランブル方式
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
US4695901A (en) * 1986-03-04 1987-09-22 Macrovision Method and apparatus for removing pseudo-sync and/or agc pulses from a video signal
ATE143557T1 (de) * 1987-07-29 1996-10-15 Scitec Corp Methode für den kopierschutz eines vorbespielten videobandes

Also Published As

Publication number Publication date
DE3855568T2 (de) 1997-02-06
EP0301504A2 (en) 1989-02-01
CA1337496C (en) 1995-10-31
GB2207797A (en) 1989-02-08
AU2016688A (en) 1989-02-02
GB2207797B (en) 1991-09-04
BR8803793A (pt) 1989-02-21
DE3855568D1 (de) 1996-10-31
GB8818073D0 (en) 1988-09-01
KR890002869A (ko) 1989-04-11
EP0301504A3 (en) 1990-11-22
AU624334B2 (en) 1992-06-11
US5179452A (en) 1993-01-12
EP0301504B1 (en) 1996-09-25
ATE143557T1 (de) 1996-10-15

Similar Documents

Publication Publication Date Title
EP0858219B1 (en) Method and apparatus for disabling anti-copy protection system in video signals
US4907093A (en) Method and apparatus for preventing the copying of a video program
CA2101200A1 (en) Apparatus and method for preventing unauthorized copying of video signals
AU577011B2 (en) Video signal processor for prohibiting vtr recording
ES2091747T3 (es) Procedimiento de proteccion contra copia de una cinta de video pregrabada.
ES2108047T3 (es) Grabador de videocassettes de doble pletina con prevencion de copia.
KR950034238A (ko) 불법 더빙을 방지하며, 디지탈 비디오 및 오디오 신호를 재생하는 장치
ES2012486B3 (es) Metodo y aparato para eliminar pulsos de control de ganancia automatico y/o pseudosincrono de una señal de video.
EP0348218A3 (en) Dual deck video recording apparatus and method
EP0256753B1 (en) Method and apparatus for preventing the copying of a video program
HK1008109B (en) Method and apparatus for preventing the copying of a video program
JPH03167979A (ja) 磁気記録再生装置
CA2252729A1 (en) Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordings
MX170480B (es) Videocinta previamente grabada protegida contra copias
HK1013757B (en) Copy protection for hybrid digital video tape recording and unprotected source material
JPS6432781A (en) Duplication preventing picture-recorded video tape and duplication preventing picture-recording system for video tape
HK1013757A1 (en) Copy protection for hybrid digital video tape recording and unprotected source material

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 301504

Country of ref document: ES