ES2012486B3 - Metodo y aparato para eliminar pulsos de control de ganancia automatico y/o pseudosincrono de una señal de video. - Google Patents

Metodo y aparato para eliminar pulsos de control de ganancia automatico y/o pseudosincrono de una señal de video.

Info

Publication number
ES2012486B3
ES2012486B3 ES87308207T ES87308207T ES2012486B3 ES 2012486 B3 ES2012486 B3 ES 2012486B3 ES 87308207 T ES87308207 T ES 87308207T ES 87308207 T ES87308207 T ES 87308207T ES 2012486 B3 ES2012486 B3 ES 2012486B3
Authority
ES
Spain
Prior art keywords
video signal
pulses
added
pseudo
video
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
ES87308207T
Other languages
English (en)
Other versions
ES2012486T5 (es
Inventor
John Oliver Ryan
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.)
Rovi Corp
Original Assignee
Macrovision 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39917146&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2012486(B3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Macrovision Corp filed Critical Macrovision Corp
Application granted granted Critical
Publication of ES2012486B3 publication Critical patent/ES2012486B3/es
Publication of ES2012486T5 publication Critical patent/ES2012486T5/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
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • 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
    • H04N7/169—Systems operating in the time domain of the television signal
    • 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
    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

PULSOS PSEUDOSINCRONOS AÑADIDO Y USOS AGC SE ELIMINAN DE UNA SEÑAL DE VIDEO PARA PERMITIR UNA GRABACION ACEPTABLE DE VIDEO. LAS SEÑALES AÑADIDAS PREVIAMENTE INTERFIEREN CON UNA GRABACION DE VIDEO ACEPTABLE, LA SEÑAL DE VIDEO, PORQUE EL CONTROL DE GANANCIA AUTOMATICO DE LOS GRABADORES DE CINTGA DE VIDEO CAPTABAN NIVELES DE GRABACION FALSOS, MIENTRAS QUE LOS RECEPTORES DE TELEVISION CONVENCIONALES ESTABAN NO ACEPTADOS POR ESAS MODIFICACIONES DE LA SEÑAL DE VIDEO. LA ELIMINACION DE LOS PULSOS AÑADIDOS PERMITE UNA GRABACION DE VIDEO ACEPTABLE DE LA SEÑAL DE VIDEO MODIFICADA PREVIAMENTE. UN CIRCUITO DE RECORTE OPERABLE SELECTIVAMENTE SE UTILIZA PARA ELIMINAR COMPONENTES DE VALOR NEGATIVO SELECCIONADAS (POR EJEMPLO PULSOS PSEUDOSINCRONOS DESDE LA SEÑAL DE VIDEO, MIENTRAS PULSOS DE AGC AÑADIDOS SON EFECTIVAMENTE BLANQUEADOS DESDE LA SEÑAL DE VIDEO CON UN INTERRUPTOR OPERABLE ELECTRICAMENTE. AMBAS FUNCIONES DE BLANQUEADO Y RECORTADO SON REALIZADAS SELECTIVAMENTE CAPTANDO AMBOS LOS PULSOS SINCRONORMALES DE LA SEÑAL DE VIDEO Y LOS PULSOS PSEUDOSINCRONOS AÑADIDOS. UN METODO Y APARATO SE REVELAN PARA LIMPIAR SEÑALES DE VIDEO MODIFICADAS POR PULSOS PSEUDOSINCRONOS O PULSOS AGC SOLO, COMBINACIONES DE AMBOS.
ES87308207T 1986-03-04 1987-09-16 Metodo y aparato para eliminar de una señal de video impulsos de pseudosincronismo y/o de control automatico de ganancia. Expired - Lifetime ES2012486T5 (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US06/836,019 US4695901A (en) 1986-03-04 1986-03-04 Method and apparatus for removing pseudo-sync and/or agc pulses from a video signal
GB08721751A GB2195510B (en) 1986-03-04 1987-09-16 Method and apparatus for removing pseudo-sync and/or agc pulses from a video signal
EP87308207A EP0255407B2 (en) 1986-03-04 1987-09-16 Method and apparatus for removing pseudo-sync and/or automatic gain control pulses from a video signal
AU78688/87A AU600522B2 (en) 1986-03-04 1987-09-21 Method and apparatus for removing pseudo-sync and/or AGC pulses from a video signal

Publications (2)

Publication Number Publication Date
ES2012486B3 true ES2012486B3 (es) 1990-04-01
ES2012486T5 ES2012486T5 (es) 1995-08-16

Family

ID=39917146

Family Applications (1)

Application Number Title Priority Date Filing Date
ES87308207T Expired - Lifetime ES2012486T5 (es) 1986-03-04 1987-09-16 Metodo y aparato para eliminar de una señal de video impulsos de pseudosincronismo y/o de control automatico de ganancia.

Country Status (8)

Country Link
US (1) US4695901A (es)
EP (1) EP0255407B2 (es)
AT (1) ATE48356T1 (es)
AU (1) AU600522B2 (es)
DE (1) DE3761073D1 (es)
ES (1) ES2012486T5 (es)
GB (1) GB2195510B (es)
GR (1) GR3000351T3 (es)

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US5394470A (en) * 1992-08-24 1995-02-28 Eidak Corporation Horizontal pulse augmentation of a video signal
US5583936A (en) * 1993-05-17 1996-12-10 Macrovision Corporation Video copy protection process enhancement to introduce horizontal and vertical picture distortions
JP3319141B2 (ja) * 1994-03-27 2002-08-26 ソニー株式会社 画像信号処理装置
JPH07307900A (ja) * 1994-05-12 1995-11-21 Funai Electric Co Ltd ビデオ一体型テレビにおける外部入力信号処理回路
US5737417A (en) * 1995-04-24 1998-04-07 Technicolor Videocassette, Inc. Videotape anti-copying encryption scheme
US7065211B1 (en) * 1995-07-21 2006-06-20 Sony Corporation Signal reproducing/recording/transmitting method and apparatus and signal recording medium
KR100489145B1 (ko) * 1995-10-17 2005-09-14 매크로비젼 코포레이션 비디오신호로부터비디오복사방지신호들의영향들을디지탈적으로제거하기위한방법및장치
US5978480A (en) * 1996-08-30 1999-11-02 Vtech Communications, Ltd. System for scrambling and descrambling video signals by altering synchronization patterns
US6058191A (en) * 1997-02-04 2000-05-02 Macrovision Corp Method and apparatus for modifying the envelope of a RF carrier signal to remove copy protection signals therefrom
US6836549B1 (en) * 1998-09-02 2004-12-28 Macrovision Corporation Method and apparatus for synthesizing and reducing the effects of video copy protection signals
US6191725B1 (en) * 1999-08-30 2001-02-20 Her Majesty The Queen In Right Of Canada, As Represented By Minister Of National Defence Of Her Majesty's Canadian Government Automatic gain control for digital radar intercept receivers
US6826352B1 (en) 2000-03-29 2004-11-30 Macrovision Corporation Dynamic video copy protection system
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Also Published As

Publication number Publication date
US4695901B1 (es) 1990-10-02
EP0255407A3 (en) 1988-08-10
EP0255407A2 (en) 1988-02-03
ES2012486T5 (es) 1995-08-16
GB2195510A (en) 1988-04-07
GR3000351T3 (en) 1991-06-07
DE3761073D1 (de) 1990-01-04
GB2195510B (en) 1988-12-07
EP0255407B1 (en) 1989-11-29
ATE48356T1 (de) 1989-12-15
AU7868887A (en) 1989-03-23
EP0255407B2 (en) 1995-03-22
US4695901A (en) 1987-09-22
AU600522B2 (en) 1990-08-16
GB8721751D0 (en) 1987-10-21

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