Source: http://www.google.com/patents/US4642688?dq=5343970
Timestamp: 2015-07-07 08:57:36
Document Index: 567402192

Matched Legal Cases: ['Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2']

Patent US4642688 - Method and apparatus for creating encrypted and decrypted television signals - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA method and apparatus for creating a television signal and encrypting or decrypting the signal at the same time. Luminance and chrominance information are received by the apparatus and stored in separate television scan line stores. The stored liminance and chrominance information is read out from their...http://www.google.com/patents/US4642688?utm_source=gb-gplus-sharePatent US4642688 - Method and apparatus for creating encrypted and decrypted television signalsAdvanced Patent SearchPublication numberUS4642688 APublication typeGrantApplication numberUS 06/736,301Publication dateFeb 10, 1987Filing dateMay 21, 1985Priority dateJun 24, 1983Fee statusPaidAlso published asCA1332976C, CN1005237B, CN86103059A, DE3650444D1, DE3650444T2, EP0223781A1, EP0223781A4, EP0223781B1, WO1986007226A1Publication number06736301, 736301, US 4642688 A, US 4642688A, US-A-4642688, US4642688 A, US4642688AInventorsJohn D. Lowry, Keith LucasOriginal AssigneeScientific Atlanta, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (33), Non-Patent Citations (8), Referenced by (50), Classifications (7), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for creating encrypted and decrypted television signals
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2547598 *Sep 13, 1947Apr 3, 1951Zenith Radio CorpSubscription image transmission system and apparatusUS2673237 *Jun 5, 1948Mar 23, 1954Zenith Radio CorpSubscriber transmission systemUS2677719 *May 29, 1948May 4, 1954Zenith Radio CorpSubscriber television systemUS2961481 *Dec 30, 1954Nov 22, 1960HammondSecrecy televisionUS2972008 *Apr 23, 1956Feb 14, 1961Paramount Pictures CorpCoding methods and systemUS3735027 *Nov 2, 1970May 22, 1973Skiatron Electronics TelevisioDecoding scrambled televisionUS4070693 *Mar 10, 1977Jan 24, 1978Westinghouse Electric CorporationSecure television transmission systemUS4319273 *Oct 26, 1979Mar 9, 1982Rca CorporationTelevision signal with encoded synchronizing signalsUS4325079 *Jun 9, 1980Apr 13, 1982Little William DSecure video transmission systemUS4330794 *Feb 25, 1980May 18, 1982Gte Automatic Electric Laboratories, Inc.Multichannel subscription television systemUS4335393 *Apr 15, 1980Jun 15, 1982Harris Video Systems, Inc.Method and system using sequentially encoded color and luminance processing of video type signals to improve picture qualityUS4338628 *Dec 19, 1979Jul 6, 1982Dynacom International, Inc.Scrambled video communication systemUS4390898 *Mar 23, 1981Jun 28, 1983Northern Telecom LimitedScrambling and unscrambling video signals in a pay TV systemUS4396946 *Mar 23, 1981Aug 2, 1983Northern Telecom LimitedTransmission of data with a video signalUS4405942 *Mar 3, 1982Sep 20, 1983Telease, Inc.Method and system for secure transmission and reception of video information, particularly for televisionUS4466017 *Dec 23, 1981Aug 14, 1984Scientific-Atlanta, Inc.Sync suppression scrambling of television signals for subscription TVCA642144A *Jun 5, 1962Zenith Radio CorpSubscription television systemCA750074A *Jan 3, 1967R And R Res LtdTelevision systemsEP0004083A2 *Mar 9, 1979Sep 19, 1979Felten &amp; Guilleaume Fernmeldeanlagen GmbHCircuit arrangement for restoring the mean picture brightness of a video signalEP0021938A1 *Jun 9, 1980Jan 7, 1981Etablissement Public de Diffusion dit "T�l�diffusion de France"Television system with access control using a variable electronic keyEP0027572A1 *Sep 29, 1980Apr 29, 1981Crypto AktiengesellschaftMethod and apparatus for ciphered transmission of informationGB1252332A * Title not availableGB1356193A * Title not availableGB1356970A * Title not availableGB1382558A * Title not availableGB1479717A * Title not availableGB1503051A * Title not availableGB1521213A * Title not availableGB1528273A * Title not availableGB1557741A * Title not availableGB1602119A * Title not availableWO1982001109A1 *Sep 18, 1981Apr 1, 1982Inc TeleaseMultiple signal transmission method and system,particularly for televisionWO1983003942A1 *Apr 25, 1983Nov 10, 1983Indep Broadcasting AuthoritySignal coding for secure transmission* Cited by examinerNon-Patent CitationsReference1 *Den Toonder et al, United Kingdom Patent Application No. 2,077,547, Dec. 16, 81.2Den Toonder et al, United Kingdom Patent Application No. 2,077,547, Dec. 16, '81.3 *Den Toonder et al, United Kingdom Patent Application No. 2,078,051, Dec. 23, 81.4Den Toonder et al, United Kingdom Patent Application No. 2,078,051, Dec. 23, '81.5 *Fondse et al, United Kingdom Patent Application No. 2,038,137, Jul. 16, 80.6Fondse et al, United Kingdom Patent Application No. 2,038,137, Jul. 16, '80.7 *W. Cheung, United Kingdom Patent Application No. 2,042,846, Dec. 24, 80.8W. Cheung, United Kingdom Patent Application No. 2,042,846, Dec. 24, '80.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS4796299 *Aug 22, 1985Jan 3, 1989Itt CorporationVideo encoder apparatusUS4837820 *Oct 17, 1986Jun 6, 1989Zenith Electronics CorporationHybrid CATV scrambling systemUS4866770 *Aug 14, 1986Sep 12, 1989Scientific Atlanta, Inc.Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication systemUS4901351 *Sep 7, 1988Feb 13, 1990Kabushiki Kaisha ToshibaVideo signal scramble systemUS4914694 *Apr 11, 1988Apr 3, 1990Eidak CorporationModifying a television signal to inhibit recording/reproductionUS4916736 *Jun 7, 1988Apr 10, 1990Macrovision CorporationMethod and apparatus for encrypting and decrypting time domain signalsUS5003590 *Dec 18, 1989Mar 26, 1991Eidak CorporationEncoding an optical video disc to inhibit video tape recordingUS5034981 *Dec 27, 1989Jul 23, 1991Eidak CorporationAnti-copying video signal processingUS5212723 *Aug 8, 1991May 18, 1993Macrovision Corp.Burst phase correction system for video descramblingUS5590194 *Aug 9, 1994Dec 31, 1996Macrovision CorporationMethod of and apparatus for scrambling a video signal with full network transmission and recording capabilityUS5657387 *Oct 19, 1995Aug 12, 1997Sony CorporationVideo signal format converting circuitUS5761304 *Apr 8, 1997Jun 2, 1998Sony CorporationVideo signal format converting circuitUS5764764 *Apr 8, 1997Jun 9, 1998Sony CorporationVideo signal format converting circuitUS6570990Nov 13, 1998May 27, 2003Lsi Logic CorporationMethod of protecting high definition video signalUS6925181Jan 30, 2003Aug 2, 2005Lsi Logic CorporationMethod of protecting high definition video signalUS7298849 *Jun 29, 2001Nov 20, 2007Intel CorporationMethod and apparatus for simultaneous encryption and decryption of publicly distributed mediaUS7310522Jan 11, 2002Dec 18, 2007Adc Telecommunications, Inc.Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communicationUS7535822May 30, 2006May 19, 2009Adc Telecommunications, Inc.Synchronization of remote units for a communication networkUS7672219Feb 6, 2007Mar 2, 2010Adc Telecommunications, Inc.Multipoint-to-point communication using orthogonal frequency division multiplexingUS7675843Feb 7, 2007Mar 9, 2010Adc Telecommunications, Inc.Multipoint-to-point communication using orthogonal frequency division multiplexingUS7697453Nov 17, 2008Apr 13, 2010Adc Telecommunications, Inc.Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexingUS7706349Nov 17, 2008Apr 27, 2010Adc Telecommunications, Inc.Methods and systems for selecting modulation in an orthogonal frequency division multiplexing systemUS7756060Nov 17, 2008Jul 13, 2010Adc Telecommunications, Inc.Tone allocation in multipoint-to-point communication using orthogonal frequency division multiplexingUS7773537Nov 17, 2008Aug 10, 2010Adc Telecommunications, Inc.Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication systemUS7872985Nov 17, 2008Jan 18, 2011Adc Dsl Systems, Inc.System for multi-frame alignmentUS7881180Oct 29, 2007Feb 1, 2011Adc Telecommunications, Inc.Systems and method for orthogonal frequency divisional multiplexingUS7881181Oct 29, 2007Feb 1, 2011Adc Telecommunications, Inc.Systems and method for orthogonal frequency divisional multiplexingUS7912138Feb 26, 2007Mar 22, 2011Adc Telecommunications, Inc.Timing and symbol alignment in multipoint-to-point communication using orthogonal frequency division multiplexingUS7936662Oct 30, 2007May 3, 2011Adc Telecommunications, Inc.Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication systemUS7957265Oct 29, 2007Jun 7, 2011Adc Telecommunications, Inc.Systems and method for orthogonal frequency divisional multiplexingUS7983141Feb 26, 2007Jul 19, 2011Geile Michael JSynchronized multipoint-to-point communication using orthogonal frequency divisionUS7995454Oct 29, 2007Aug 9, 2011Htc CorporationSystems and method for orthogonal frequency divisional multiplexingUS8001374 *Dec 16, 2005Aug 16, 2011Lsi CorporationMemory encryption for digital videoUS8089853Oct 29, 2007Jan 3, 2012Htc CorporationSystems and method for orthogonal frequency divisional multiplexingUS8174956Oct 29, 2007May 8, 2012Htc CorporationSystems and method for orthogonal frequency divisional multiplexingUS8199632Oct 29, 2007Jun 12, 2012Htc CorporationSystems and method for orthogonal frequency divisional multiplexingUS8213398Aug 26, 2009Jul 3, 2012Htc CorporationMethod for multiple use subchannelsUS8213399Sep 28, 2009Jul 3, 2012Htc CorporationSystem for multiple use subchannelsUS8315150Jun 10, 2011Nov 20, 2012Htc CorporationSynchronized multipoint-to-point communication using orthogonal frequency divisionUS8351321Oct 29, 2007Jan 8, 2013Htc CorporationSystems and method for orthogonal frequency divisional multiplexingUS8406115Jun 10, 2011Mar 26, 2013Htc CorporationSystems and methods for orthogonal frequency division multiplexingUS8547824Apr 11, 2012Oct 1, 2013Htc CorporationSystems and methods for orthogonal frequency divisional multiplexingUS8576693Dec 5, 2011Nov 5, 2013Htc CorporationSystems and method for orthogonal frequency division multiplexingUS8638655Dec 6, 2012Jan 28, 2014Htc CorporationSystems and method for orthogonal frequency divisional multiplexingUSRE41771Sep 29, 2009Sep 28, 2010Adc Telecommunications, Inc.System for multiple use subchannelsUSRE42236Oct 9, 2009Mar 22, 2011Adc Telecommunications, Inc.Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexingUSRE44460Jan 14, 2011Aug 27, 2013Htc CorporationSystems for synchronous multipoint-to-point orthogonal frequency division multiplexing communicationWO1989010043A1 *Apr 4, 1989Oct 19, 1989Eidak CorpModifying a television signal to inhibit recording/reproductionWO1991009500A1 *Nov 28, 1990Jun 27, 1991Eidak CorpEncoding an optical video disc to inhibit video tape recordingWO1992017984A1 *Mar 10, 1992Oct 15, 1992Factum Elektronik Sweden AbTv-signal transmission pay-tv-system* Cited by examinerClassifications U.S. Classification380/218, 348/E07.059, 380/217International ClassificationH04N7/169, H04NCooperative ClassificationH04N7/1696European ClassificationH04N7/169CLegal EventsDateCodeEventDescriptionJul 1, 1985ASAssignmentOwner name: DIGITAL VIDEO SYSTEMS CORPORATION 120 MIDDLEFIELDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:LOWRY, JOHN D.;LUCAS, KEITH;REEL/FRAME:004437/0746Effective date: 19850618Mar 6, 1986ASAssignmentOwner name: SCIENTIFIC ATLANTA, INC., ONE TECHNOLOGY PARKWAY,Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DIGITAL VIDEO SYSTEMS CORPORATION;REEL/FRAME:004519/0462Effective date: 19860221Owner name: SCIENTIFIC ATLANTA, INC., A CORP. OF GEORGIA,GEORGFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIGITAL VIDEO SYSTEMS CORPORATION;REEL/FRAME:004519/0462Owner name: SCIENTIFIC ATLANTA, INC., A CORP. OF GEORGIA,GEORGFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIGITAL VIDEO SYSTEMS CORPORATION;REEL/FRAME:004519/0462Effective date: 19860221Jul 20, 1990FPAYFee paymentYear of fee payment: 4Jul 5, 1994FPAYFee paymentYear of fee payment: 8Jul 30, 1998FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services