ES2012486T5 - Metodo y aparato para eliminar de una señal de video impulsos de pseudosincronismo y/o de control automatico de ganancia. - Google Patents
Metodo y aparato para eliminar de una señal de video impulsos de pseudosincronismo y/o de control automatico de ganancia.Info
- Publication number
- ES2012486T5 ES2012486T5 ES87308207T ES87308207T ES2012486T5 ES 2012486 T5 ES2012486 T5 ES 2012486T5 ES 87308207 T ES87308207 T ES 87308207T ES 87308207 T ES87308207 T ES 87308207T ES 2012486 T5 ES2012486 T5 ES 2012486T5
- 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
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)
- Transforming Light Signals Into Electric Signals (AREA)
- Control Of Amplification And Gain Control (AREA)
- Closed-Circuit Television Systems (AREA)
- Burglar Alarm Systems (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (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.
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 ES2012486B3 (es) | 1990-04-01 |
ES2012486T5 true 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) |
Families Citing this family (51)
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 |
US5130810A (en) * | 1983-11-23 | 1992-07-14 | Macrovision Corporation | Method and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordings |
US5194965A (en) * | 1983-11-23 | 1993-03-16 | Macrovision Corporation | Method and apparatus for disabling anti-copy protection system in video signals |
US4790011A (en) * | 1986-10-17 | 1988-12-06 | Zenith Electronics Corporation | Auto clamp for modulator for suppressed sync signals |
US4803552A (en) * | 1986-12-03 | 1989-02-07 | Xantech Corporation | Vertical blanking interval standardizer circuit |
US4777648A (en) * | 1986-12-15 | 1988-10-11 | Trw Inc. | Line tilt compensation method and apparatus |
EP0301504B1 (en) * | 1987-07-29 | 1996-09-25 | Scitec Corporation | Method of copy protecting a pre-recorded videotape |
US5220426A (en) * | 1988-02-05 | 1993-06-15 | Karlock James A | Circuitry for removing information from, or modifying information in, the vertical interval of a television signal |
US4914694A (en) * | 1988-04-11 | 1990-04-03 | Eidak Corporation | Modifying a television signal to inhibit recording/reproduction |
US5142575A (en) * | 1988-04-29 | 1992-08-25 | Scientific-Atlanta, Inc. | Method and apparatus for improving video scrambling and employing split sync pulses |
US4924498A (en) * | 1988-04-29 | 1990-05-08 | Scientific Atlanta, Inc. | Method and apparatus for improving video scrambling and employing split snyc pulses |
US4912691A (en) * | 1988-08-01 | 1990-03-27 | Raymond Jones | Video stabilizer |
DE8812594U1 (de) * | 1988-10-04 | 1988-11-24 | Ellerbrok, Ingrid, 1000 Berlin | Vorschaltgerät für Videorecorder zum Löschen von Artefakten |
US5177787A (en) * | 1989-05-01 | 1993-01-05 | Scientific-Atlanta, Inc | Scrambler with self-calibration |
GB2233184B (en) * | 1989-05-26 | 1993-05-19 | Pioneer Electronic Corp | Catv terminal unit having an improved descrambling operation |
US5003590A (en) * | 1989-12-18 | 1991-03-26 | Eidak Corporation | Encoding an optical video disc to inhibit video tape recording |
JPH03125576U (es) * | 1990-03-29 | 1991-12-18 | ||
NL9000951A (nl) * | 1990-04-20 | 1991-11-18 | Copyguard Enterprises | Werkwijze en toestel voor het verhinderen van het onrechtmatig op band overnemen van beeldsignalen. |
DE69122338T2 (de) * | 1990-08-03 | 1997-02-13 | Canon Kk | Synchronsignal-Detektorschaltung und dieselbe enthaltender Synchronsignal-Detektorapparat |
JPH04115790A (ja) * | 1990-09-05 | 1992-04-16 | Sharp Corp | 同期回路 |
US5155767A (en) * | 1991-11-12 | 1992-10-13 | Noller Robert R | Method and apparatus for manufacturing pre-recorded videotape programs |
US5410364A (en) * | 1992-01-15 | 1995-04-25 | Karlock; James A. | Method and apparatus for removing AGC pulses and other undesirable signals from a video signal |
KR940008492B1 (ko) * | 1992-03-23 | 1994-09-15 | 삼성전자 주식회사 | 문자발생회로의 오동작 방지회로 |
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 |
ATE477678T1 (de) * | 1995-10-17 | 2010-08-15 | Rovi Solutions Corp | Digitale entfernung von videokopierschutzimpulsen |
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 |
US6865337B1 (en) | 2000-08-08 | 2005-03-08 | Conexant Systems, Inc. | System and method for detecting modifications of video signals designed to prevent copying by traditional video tape recorders |
US7110042B1 (en) * | 2001-11-07 | 2006-09-19 | Pixelworks, Inc. | Synchronization signal decoder and associated method |
US20050111661A1 (en) | 2002-02-01 | 2005-05-26 | Arie Wijnen | Anti-copy protection for a video signal |
GB2390247B (en) * | 2002-06-28 | 2006-04-12 | Dwight Cavendish Systems Ltd | An improved method and apparatus for providing an anti-copy video signal |
US7376337B2 (en) * | 2002-09-30 | 2008-05-20 | Matsushita Electric Industrial Co., Ltd. | Video signal recording apparatus for copyrighted works |
GB0312985D0 (en) | 2003-06-05 | 2003-07-09 | Dwight Cavendish Systems Ltd | Digital processing disruption systems |
JP4424929B2 (ja) * | 2003-07-15 | 2010-03-03 | パイオニア株式会社 | 情報記録媒体、情報再生装置及び情報再生方法 |
GB2419220B (en) * | 2004-10-13 | 2009-06-03 | Dwight Cavendish Systems Ltd | Audio copy protection system |
CA2585732C (en) * | 2004-10-28 | 2012-03-20 | Macrovision Corporation | Content management for high definition television |
US7792293B2 (en) * | 2005-05-06 | 2010-09-07 | Rovi Solutions Corporation | Method and apparatus for modifying a subsequently generated control command in a content control system |
US8144250B2 (en) * | 2006-12-26 | 2012-03-27 | John Louis Kotos | Microcontroller-based multi-format video AGC/sync loop regulator |
US8428258B2 (en) * | 2007-05-02 | 2013-04-23 | Rovi Technologies Corporation | Method and apparatus for providing content control via detection of modifications to a signal |
US20080309816A1 (en) * | 2007-06-15 | 2008-12-18 | Macrovision Corporation | Television content control system and method with cross-platform capability |
US8280049B2 (en) * | 2008-08-27 | 2012-10-02 | Rovi Solutions Corporation | Method and apparatus for synthesizing copy protection for reducing/defeating the effectiveness or capability of a circumvention device |
US8374490B2 (en) * | 2010-02-24 | 2013-02-12 | Rovi Technologies Corporation | Method and apparatus for receiving metadata, EPG, or IPG signals in an integrated circuit for control purposes |
US8306403B2 (en) * | 2010-03-29 | 2012-11-06 | Rovi Technologies Corporation | Content control via guide data and/or metadata |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3029306A (en) * | 1958-05-19 | 1962-04-10 | Ampex | Video recording system and method and processing amplifier network |
US3081376A (en) * | 1959-03-23 | 1963-03-12 | Zenith Radio Corp | Subscription television system |
US3197559A (en) * | 1960-10-25 | 1965-07-27 | Sony Corp | Magnetic recording and reproducing system with mechanical generation of synchronizing information |
US3478166A (en) * | 1963-09-09 | 1969-11-11 | Intern Telemeter Corp | Cryptographic subscription television system with grey sync and dual mode augmenting signals |
US3439113A (en) * | 1963-11-15 | 1969-04-15 | Teleglobe Pay Tv System Inc | Subscription television communication system |
GB1068881A (en) * | 1964-04-07 | 1967-05-17 | R & R Res Ltd | Improvements in and relating to television apparatus |
CA935915A (en) * | 1964-08-01 | 1973-10-23 | Sony Corporation | Video magnetic recording and reproducing system |
GB1114977A (en) * | 1965-01-23 | 1968-05-22 | Sony Corp | Magnetic recording and playback system |
US3446914A (en) * | 1965-10-12 | 1969-05-27 | Minnesota Mining & Mfg | Audio and video recording with phase modulated audio pulse on horizontal back porch |
US3470315A (en) * | 1965-11-18 | 1969-09-30 | Sony Corp | Skip field recording and reproducing system with modified vertical sync signal |
US3470316A (en) * | 1965-11-18 | 1969-09-30 | Sony Corp | Skip field recording and reproducing system with vertical sync signal generation |
US3488433A (en) * | 1965-12-03 | 1970-01-06 | Akai Electric | Video tape recorder employing a delay of the horizontal sync signals to facilitate separation from the video signal |
GB1128591A (es) * | 1965-12-11 | 1968-09-25 | ||
GB1149626A (en) * | 1966-02-08 | 1969-04-23 | Akai Electric | Magnetic recording and reproducing system |
US3504116A (en) * | 1966-02-25 | 1970-03-31 | Akai Electric | Magnetic recording system with a disabled bias oscillator during the vertical synchronization interval |
US3517127A (en) * | 1966-03-21 | 1970-06-23 | Fowler Allan R | Sync generator and recording system including same |
US3530232A (en) * | 1966-06-17 | 1970-09-22 | Intern Telemeter Corp | Subscription television 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 |
JPS52114313A (en) * | 1976-03-23 | 1977-09-26 | Sony Corp | Recorded medium and production method therefor |
US4121242A (en) * | 1976-04-20 | 1978-10-17 | Janko Mike A | Video processor providing sync stripping and reinsertion |
JPS5389715A (en) * | 1977-01-19 | 1978-08-07 | Sony Corp | Transmitting method for luminance signal |
US4213149A (en) * | 1978-12-26 | 1980-07-15 | Janko Mike A | Apparatus for preventing video tape duplication |
GB2055501A (en) * | 1979-08-03 | 1981-03-04 | Ivs Uk Ltd | Video tape recording apparatus |
US4319273A (en) * | 1979-10-26 | 1982-03-09 | Rca Corporation | Television signal with encoded synchronizing signals |
CA1153103A (en) * | 1981-03-19 | 1983-08-30 | Northern Telecom Limited | Scrambling and unscrambling video signals in a pay tv system |
JPS57200811A (en) * | 1981-06-04 | 1982-12-09 | Fuji Heavy Ind Ltd | Crank angle detecting device |
US4571642A (en) * | 1981-08-24 | 1986-02-18 | Hofstein Steven R | Method of and apparatus for modifying a video signal to prevent the unauthorized recording and reproduction thereof |
JPS58123289A (ja) * | 1982-01-18 | 1983-07-22 | Shinano Kikaku:Kk | 否複製映像録画済磁気テ−プの記録方法 |
US4467358A (en) * | 1982-02-09 | 1984-08-21 | Switsen Henry N | Video tape recorder signal processor |
AU2494384A (en) * | 1983-02-09 | 1984-08-30 | Societe Internationale De Service A L'Exportation Dite Sisex & Specialites Electro Physiques Sep & Recherches Integrees Au Marketing Rim | Device for the protection of magnetic tapes, or other recording media, or television or radio broadcasting against an authorized reading and/or reproduction |
EP0162071A1 (fr) * | 1983-11-21 | 1985-11-27 | Haute Securite Video Hsv S.A. | Procede et dispositif anti-piraterie pour supports d'images cinematographiques et video |
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 |
-
1986
- 1986-03-04 US US06/836,019 patent/US4695901A/en not_active Expired - Lifetime
-
1987
- 1987-09-16 GB GB08721751A patent/GB2195510B/en not_active Expired
- 1987-09-16 DE DE8787308207T patent/DE3761073D1/de not_active Expired - Lifetime
- 1987-09-16 AT AT87308207T patent/ATE48356T1/de not_active IP Right Cessation
- 1987-09-16 ES ES87308207T patent/ES2012486T5/es not_active Expired - Lifetime
- 1987-09-16 EP EP87308207A patent/EP0255407B2/en not_active Expired - Lifetime
- 1987-09-21 AU AU78688/87A patent/AU600522B2/en not_active Expired
-
1990
- 1990-02-15 GR GR90400086T patent/GR3000351T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
ES2012486B3 (es) | 1990-04-01 |
US4695901B1 (es) | 1990-10-02 |
GB2195510A (en) | 1988-04-07 |
ATE48356T1 (de) | 1989-12-15 |
EP0255407B1 (en) | 1989-11-29 |
AU600522B2 (en) | 1990-08-16 |
EP0255407A2 (en) | 1988-02-03 |
GB2195510B (en) | 1988-12-07 |
GB8721751D0 (en) | 1987-10-21 |
DE3761073D1 (de) | 1990-01-04 |
AU7868887A (en) | 1989-03-23 |
EP0255407B2 (en) | 1995-03-22 |
US4695901A (en) | 1987-09-22 |
EP0255407A3 (en) | 1988-08-10 |
GR3000351T3 (en) | 1991-06-07 |
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