NO944678L - Fremgangsmåte og anordning for å styre tilgang til digitale signaler - Google Patents

Fremgangsmåte og anordning for å styre tilgang til digitale signaler

Info

Publication number
NO944678L
NO944678L NO944678A NO944678A NO944678L NO 944678 L NO944678 L NO 944678L NO 944678 A NO944678 A NO 944678A NO 944678 A NO944678 A NO 944678A NO 944678 L NO944678 L NO 944678L
Authority
NO
Norway
Prior art keywords
digital signals
communication path
controlling access
encryption scheme
over
Prior art date
Application number
NO944678A
Other languages
English (en)
Norwegian (no)
Other versions
NO944678D0 (no
Inventor
Jeffrey S Hamilton
Marc Kauffman
Lawrence D Vince
Original Assignee
Gen Instr Co
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
Application filed by Gen Instr Co filed Critical Gen Instr Co
Publication of NO944678D0 publication Critical patent/NO944678D0/no
Publication of NO944678L publication Critical patent/NO944678L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
    • H04N21/2221—Secondary servers, e.g. proxy server, cable television Head-end being a cable television head-end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • 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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Astronomy & Astrophysics (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)
  • Selective Calling Equipment (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
NO944678A 1994-02-02 1994-12-05 Fremgangsmåte og anordning for å styre tilgang til digitale signaler NO944678L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/191,031 US5504816A (en) 1994-02-02 1994-02-02 Method and apparatus for controlling access to digital signals

Publications (2)

Publication Number Publication Date
NO944678D0 NO944678D0 (no) 1994-12-05
NO944678L true NO944678L (no) 1995-08-03

Family

ID=22703848

Family Applications (1)

Application Number Title Priority Date Filing Date
NO944678A NO944678L (no) 1994-02-02 1994-12-05 Fremgangsmåte og anordning for å styre tilgang til digitale signaler

Country Status (9)

Country Link
US (1) US5504816A (fr)
EP (1) EP0666694B1 (fr)
JP (1) JPH08107412A (fr)
KR (1) KR100371833B1 (fr)
AU (1) AU676404B2 (fr)
CA (1) CA2137616C (fr)
DE (1) DE69428673T2 (fr)
ES (1) ES2165862T3 (fr)
NO (1) NO944678L (fr)

Families Citing this family (125)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7036019B1 (en) * 1994-04-01 2006-04-25 Intarsia Software Llc Method for controlling database copyrights
JPH07271865A (ja) * 1994-04-01 1995-10-20 Mitsubishi Corp データベース著作権管理方法
US6744894B1 (en) 1994-04-01 2004-06-01 Mitsubishi Corporation Data management system
US6741991B2 (en) * 1994-09-30 2004-05-25 Mitsubishi Corporation Data management system
US7302415B1 (en) * 1994-09-30 2007-11-27 Intarsia Llc Data copyright management system
EP1691315A1 (fr) 1994-10-27 2006-08-16 Intarsia Software LLC Système d'administration des droits de reproduction
US6789197B1 (en) 1994-10-27 2004-09-07 Mitsubishi Corporation Apparatus for data copyright management system
US6424715B1 (en) * 1994-10-27 2002-07-23 Mitsubishi Corporation Digital content management system and apparatus
DE69532434T2 (de) * 1994-10-27 2004-11-11 Mitsubishi Corp. Gerät für Dateiurheberrechte-Verwaltungssystem
US5652795A (en) * 1994-11-14 1997-07-29 Hughes Electronics Method and apparatus for an adapter card providing conditional access in a communication system
JPH08263438A (ja) * 1994-11-23 1996-10-11 Xerox Corp ディジタルワークの配給及び使用制御システム並びにディジタルワークへのアクセス制御方法
US6963859B2 (en) 1994-11-23 2005-11-08 Contentguard Holdings, Inc. Content rendering repository
KR0152788B1 (ko) 1994-11-26 1998-10-15 이헌조 디지탈 영상 시스템의 복사 방지 방법 및 장치
KR0136458B1 (ko) 1994-12-08 1998-05-15 구자홍 디지탈 자기 기록재생 시스템의 복사 방지장치
US5675645A (en) * 1995-04-18 1997-10-07 Ricoh Company, Ltd. Method and apparatus for securing executable programs against copying
US5627892A (en) * 1995-04-19 1997-05-06 General Instrument Corporation Of Delaware Data security scheme for point-to-point communication sessions
US5949883A (en) * 1995-09-28 1999-09-07 Entrust Technologies Ltd. Encryption system for mixed-trust environments
US5659618A (en) * 1995-09-29 1997-08-19 Vlsi Technology, Inc. Multi-size cryptographic key system
US8595502B2 (en) * 1995-09-29 2013-11-26 Intarsia Software Llc Data management system
US7801817B2 (en) * 1995-10-27 2010-09-21 Makoto Saito Digital content management system and apparatus
FI100563B (fi) 1996-01-30 1997-12-31 Nokia Oy Ab Digitaalisten esitysobjektien salaus lähetyksessä ja tallennuksessa
US5996103A (en) * 1996-07-31 1999-11-30 Samsung Information Systems America Apparatus and method for correcting errors in a communication system
US5946052A (en) * 1996-08-01 1999-08-31 Thomson Consumer Electronics, Inc. System for acquiring and processing video data and program guides transmitted in different coding formats
US6016348A (en) * 1996-11-27 2000-01-18 Thomson Consumer Electronics, Inc. Decoding system and data format for processing and storing encrypted broadcast, cable or satellite video data
US5970386A (en) * 1997-01-27 1999-10-19 Hughes Electronics Corporation Transmodulated broadcast delivery system for use in multiple dwelling units
US6104908A (en) * 1997-02-28 2000-08-15 Hughes Electronics Corporation System for and method of combining signals of combining signals of diverse modulation formats for distribution in multiple dwelling units
US6233684B1 (en) 1997-02-28 2001-05-15 Contenaguard Holdings, Inc. System for controlling the distribution and use of rendered digital works through watermaking
JPH10257098A (ja) * 1997-03-07 1998-09-25 Sony Corp 通信経路制御装置及び通信経路制御方法、並びに通信経路制御ユニット
US6430199B1 (en) * 1998-03-27 2002-08-06 Telcordia Technologies, Inc. Method and system for distributing telephone and broadband services over the copper pairs within a service location
EP0995316A2 (fr) * 1998-03-31 2000-04-26 Koninklijke Philips Electronics N.V. Procede et dispositif permettant de modifier des donnees dans un train de donnees codees
JP4763866B2 (ja) 1998-10-15 2011-08-31 インターシア ソフトウェア エルエルシー ２重再暗号化によりデジタルデータを保護する方法及び装置
US6229895B1 (en) * 1999-03-12 2001-05-08 Diva Systems Corp. Secure distribution of video on-demand
KR100320183B1 (ko) * 1999-03-17 2002-01-10 구자홍 디지탈데이터 플레이어의 파일 암호화 장치
US7171567B1 (en) * 1999-08-02 2007-01-30 Harris Interactive, Inc. System for protecting information over the internet
US7151832B1 (en) 1999-11-18 2006-12-19 International Business Machines Corporation Dynamic encryption and decryption of a stream of data
US7177841B2 (en) * 2000-01-28 2007-02-13 Canon Kabushiki Kaisha Digital contents distribution system, digital contents distribution method, roaming server, information processor, and information processing method
US7203311B1 (en) * 2000-07-21 2007-04-10 The Directv Group, Inc. Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device
US8140859B1 (en) * 2000-07-21 2012-03-20 The Directv Group, Inc. Secure storage and replay of media programs using a hard-paired receiver and storage device
US7412605B2 (en) * 2000-08-28 2008-08-12 Contentguard Holdings, Inc. Method and apparatus for variable encryption of data
US7743259B2 (en) * 2000-08-28 2010-06-22 Contentguard Holdings, Inc. System and method for digital rights management using a standard rendering engine
US7688803B1 (en) 2000-09-01 2010-03-30 Young Steven J System and method for coordinating between multiple telephony channels
US6963972B1 (en) * 2000-09-26 2005-11-08 International Business Machines Corporation Method and apparatus for networked information dissemination through secure transcoding
US7343324B2 (en) * 2000-11-03 2008-03-11 Contentguard Holdings Inc. Method, system, and computer readable medium for automatically publishing content
US7200859B1 (en) 2000-11-22 2007-04-03 Digeo, Inc. Apparatus and method for intelligent multimedia compression and distribution
US20020094089A1 (en) * 2000-12-28 2002-07-18 Shigeki Kamiya Data delivery method and data delivery system
US6912294B2 (en) * 2000-12-29 2005-06-28 Contentguard Holdings, Inc. Multi-stage watermarking process and system
US6647149B2 (en) 2001-01-03 2003-11-11 Electronics For Imaging, Inc. Methods and apparatus for securely transmitting and processing digital image data
US6813643B2 (en) 2001-01-05 2004-11-02 Digeo, Inc. Multimedia system with selectable protocol module including MPEG logic and docsis logic sharing a single tuner
JP4752113B2 (ja) * 2001-01-16 2011-08-17 ソニー株式会社 電子機器及び信号伝送方法
ATE272924T1 (de) * 2001-01-16 2004-08-15 Nagracard Sa Verfahren zum speichern verschlüsselter daten
US7774279B2 (en) * 2001-05-31 2010-08-10 Contentguard Holdings, Inc. Rights offering and granting
US8069116B2 (en) * 2001-01-17 2011-11-29 Contentguard Holdings, Inc. System and method for supplying and managing usage rights associated with an item repository
US6754642B2 (en) * 2001-05-31 2004-06-22 Contentguard Holdings, Inc. Method and apparatus for dynamically assigning usage rights to digital works
US20040039704A1 (en) * 2001-01-17 2004-02-26 Contentguard Holdings, Inc. System and method for supplying and managing usage rights of users and suppliers of items
US7028009B2 (en) * 2001-01-17 2006-04-11 Contentguardiholdings, Inc. Method and apparatus for distributing enforceable property rights
US20020116705A1 (en) 2001-02-20 2002-08-22 Perlman Stephen G. System and method for processing conditional access data
US20020114360A1 (en) * 2001-02-20 2002-08-22 Perlman Stephen G. System and method for processing multiple broadcast multimedia streams
JP2002259170A (ja) * 2001-02-23 2002-09-13 Samsung Electronics Co Ltd データ変換複写装置及び方法
US7046805B2 (en) 2001-03-20 2006-05-16 Digeo, Inc. System and method for efficiently storing and processing multimedia content
US7386129B2 (en) * 2001-05-30 2008-06-10 Digeo, Inc. System and method for multimedia content simulcast
US7093277B2 (en) * 2001-05-30 2006-08-15 Digeo, Inc. System and method for improved multi-stream multimedia transmission and processing
US7222104B2 (en) 2001-05-31 2007-05-22 Contentguard Holdings, Inc. Method and apparatus for transferring usage rights and digital work having transferrable usage rights
US8275716B2 (en) 2001-05-31 2012-09-25 Contentguard Holdings, Inc. Method and system for subscription digital rights management
US6876984B2 (en) 2001-05-31 2005-04-05 Contentguard Holdings, Inc. Method and apparatus for establishing usage rights for digital content to be created in the future
US20030009424A1 (en) * 2001-05-31 2003-01-09 Contentguard Holdings, Inc. Method for managing access and use of resources by verifying conditions and conditions for use therewith
US8099364B2 (en) * 2001-05-31 2012-01-17 Contentguard Holdings, Inc. Digital rights management of content when content is a future live event
US7725401B2 (en) 2001-05-31 2010-05-25 Contentguard Holdings, Inc. Method and apparatus for establishing usage rights for digital content to be created in the future
US8001053B2 (en) * 2001-05-31 2011-08-16 Contentguard Holdings, Inc. System and method for rights offering and granting using shared state variables
US8275709B2 (en) * 2001-05-31 2012-09-25 Contentguard Holdings, Inc. Digital rights management of content when content is a future live event
US6895503B2 (en) * 2001-05-31 2005-05-17 Contentguard Holdings, Inc. Method and apparatus for hierarchical assignment of rights to documents and documents having such rights
CN1539115A (zh) * 2001-06-07 2004-10-20 ��̹�е¿عɹɷ����޹�˾ 管理权限转移的方法和装置
US7774280B2 (en) 2001-06-07 2010-08-10 Contentguard Holdings, Inc. System and method for managing transfer of rights using shared state variables
WO2002101490A2 (fr) * 2001-06-07 2002-12-19 Contentguard Holdings, Inc. Procede et dispositif pour gerer les zones de confiance multiples dans un systeme de gestion des droits d'auteur electroniques
US20020186769A1 (en) * 2001-06-12 2002-12-12 O'brien Royal System and method for transcoding
EP1271951A1 (fr) * 2001-06-22 2003-01-02 Octalis S.A. Système d'accès conditionnel de données numériques par déchiffrage des clés et réchiffrage
US7065213B2 (en) * 2001-06-29 2006-06-20 Scientific-Atlanta, Inc. In a subscriber network receiving digital packets and transmitting digital packets below a predetermined maximum bit rate
ES2295105T3 (es) * 2001-07-26 2008-04-16 Irdeto Access B.V. Sistema para la validacion de tiempo horario.
US7463737B2 (en) 2001-08-15 2008-12-09 Digeo, Inc. System and method for conditional access key encryption
DE60239003D1 (de) * 2001-10-19 2011-03-03 Pioneer Corp Steuersystem und Verfahren für elektronische Einrichtungen, und Steuervorrichtung
US7840488B2 (en) * 2001-11-20 2010-11-23 Contentguard Holdings, Inc. System and method for granting access to an item or permission to use an item based on configurable conditions
US7974923B2 (en) * 2001-11-20 2011-07-05 Contentguard Holdings, Inc. Extensible rights expression processing system
WO2003044680A1 (fr) * 2001-11-20 2003-05-30 Contentguard Holdings, Inc. Systemes et procedes de creation, de manipulation et de traitement d'expressions de droits et de contrats au moyen de gabarits segmentes
US7088823B2 (en) * 2002-01-09 2006-08-08 International Business Machines Corporation System and method for secure distribution and evaluation of compressed digital information
US20030229593A1 (en) * 2002-03-14 2003-12-11 Michael Raley Rights expression profile system and method
KR100703521B1 (ko) * 2002-03-14 2007-04-03 콘텐트가드 홀딩즈 인코포레이티드 사용권리 표현을 처리하기 위한 방법 및 장치
US7805371B2 (en) * 2002-03-14 2010-09-28 Contentguard Holdings, Inc. Rights expression profile system and method
US20040024670A1 (en) * 2002-04-29 2004-02-05 Contentguard Holdings, Inc. Rights management system using legality expression language
US20040060074A1 (en) * 2002-09-19 2004-03-25 Ganesh Basawapatna Video distribution system with increased centralized processing
US7690022B2 (en) * 2002-10-02 2010-03-30 Ganesh Basawapatna Video distribution system for digital and analog subscribers
AU2003288591A1 (en) * 2002-12-18 2004-07-09 Koninklijke Philips Electronics N.V. Dedicated encrypted virtual channel in a multi-channel serial communications interface
WO2004071086A1 (fr) * 2003-02-10 2004-08-19 Rf Korea Inc. Appareil de reception t.v. sans fil multicanal
US7685642B2 (en) * 2003-06-26 2010-03-23 Contentguard Holdings, Inc. System and method for controlling rights expressions by stakeholders of an item
US7848303B2 (en) 2003-06-30 2010-12-07 Nxp B.V. Satellite multi-choice switch system
US7564892B1 (en) * 2003-06-30 2009-07-21 Nxp B.V. Satellite transcoder
TW200509637A (en) 2003-07-14 2005-03-01 Nagravision Sa Method to create and manage a local network
US20050097593A1 (en) * 2003-11-05 2005-05-05 Michael Raley System, method and device for selected content distribution
IL159838A0 (en) 2004-01-13 2004-06-20 Yehuda Binder Information device
US7590243B2 (en) * 2004-05-04 2009-09-15 The Directv Group, Inc. Digital media conditional access system for handling digital media content
US20060107326A1 (en) * 2004-11-12 2006-05-18 Demartini Thomas Method, system, and device for verifying authorized issuance of a rights expression
US20060106726A1 (en) * 2004-11-18 2006-05-18 Contentguard Holdings, Inc. Method, system, and device for license-centric content consumption
US8660961B2 (en) 2004-11-18 2014-02-25 Contentguard Holdings, Inc. Method, system, and device for license-centric content consumption
US20060112015A1 (en) * 2004-11-24 2006-05-25 Contentguard Holdings, Inc. Method, system, and device for handling creation of derivative works and for adapting rights to derivative works
US20060248573A1 (en) * 2005-04-28 2006-11-02 Content Guard Holdings, Inc. System and method for developing and using trusted policy based on a social model
US20060271915A1 (en) * 2005-05-24 2006-11-30 Contentguard Holdings, Inc. Usage rights grammar and digital works having usage rights created with the grammar
JP2006339988A (ja) * 2005-06-01 2006-12-14 Sony Corp ストリーム制御装置、ストリーム暗号化／復号化装置、および、ストリーム暗号化／復号化方法
US9325944B2 (en) * 2005-08-11 2016-04-26 The Directv Group, Inc. Secure delivery of program content via a removable storage medium
EP1929685A4 (fr) * 2005-09-29 2011-12-21 Contentguard Holdings Inc Systeme et procede de gestion des droits numeriques utilisant une copie avancee comportant les droits d'emission et des jetons de copie geres
US7720767B2 (en) * 2005-10-24 2010-05-18 Contentguard Holdings, Inc. Method and system to support dynamic rights and resources sharing
JP4667235B2 (ja) * 2005-12-28 2011-04-06 日本電信電話株式会社 データの配信・受信システムおよびデータの配信・受信方法
US8996421B2 (en) * 2006-05-15 2015-03-31 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at broadcast headends in pay delivery systems
US8095466B2 (en) * 2006-05-15 2012-01-10 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at content servers in pay delivery systems
US7992175B2 (en) 2006-05-15 2011-08-02 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast systems
US8001565B2 (en) * 2006-05-15 2011-08-16 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at receivers in pay delivery systems
US20070265966A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Content delivery systems and methods to operate the same
US8775319B2 (en) 2006-05-15 2014-07-08 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
US20070265973A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Methods and apparatus to protect content in home networks
US9225761B2 (en) 2006-08-04 2015-12-29 The Directv Group, Inc. Distributed media-aggregation systems and methods to operate the same
US9178693B2 (en) 2006-08-04 2015-11-03 The Directv Group, Inc. Distributed media-protection systems and methods to operate the same
JP4536092B2 (ja) * 2007-07-30 2010-09-01 日本放送協会 限定受信方式の処理装置
JP4536091B2 (ja) * 2007-07-30 2010-09-01 日本放送協会 限定受信方式の処理装置及び処理方法
CN100562098C (zh) * 2008-01-03 2009-11-18 济南市泰信电子有限责任公司 数字电视条件接收系统及其处理流程
FR2933564A1 (fr) * 2008-07-02 2010-01-08 Thomson Licensing Procede d'embrouillage et desembrouillage pour le transport de flux de donnees audio video mpeg2
WO2011024298A1 (fr) * 2009-08-28 2011-03-03 リプレックス株式会社 Système de service
JP2012100352A (ja) * 2012-02-09 2012-05-24 Ripplex Inc サービスシステム
US20160188196A1 (en) * 2014-12-30 2016-06-30 Airwatch Llc Floating media player

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222068A (en) * 1978-11-02 1980-09-09 American Television And Communications Corporation Subscription television apparatus and methods
US4613901A (en) * 1983-05-27 1986-09-23 M/A-Com Linkabit, Inc. Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
US4817146A (en) * 1984-10-17 1989-03-28 General Electric Company Cryptographic digital signal transceiver method and apparatus
GB2172127B (en) * 1985-03-06 1988-10-12 Ferranti Plc Data compression system
JP3143108B2 (ja) * 1990-03-13 2001-03-07 株式会社日立製作所 ファイル暗号化方法およびファイル暗号システム
JPH03291083A (ja) * 1990-04-09 1991-12-20 Matsushita Electric Ind Co Ltd Ｃａｔｖシステムのキー信号変換装置
US5144664A (en) * 1990-11-16 1992-09-01 General Instrument Corporation Apparatus and method for upgrading terminals to maintain a secure communication network
US5153918A (en) * 1990-11-19 1992-10-06 Vorec Corporation Security system for data communications
JP2781906B2 (ja) * 1991-03-29 1998-07-30 パイオニア株式会社 ケーブルネットにおけるｃａｔｖセンター装置及び番組供給方法
US5138659A (en) * 1991-05-02 1992-08-11 General Instrument Corporation Conversion of television signal formats with retention of common control data stream
US5173775A (en) * 1991-05-02 1992-12-22 General Instrument Corporation Reformatting of television signal data for transmission using a different modulation scheme
US5173900A (en) * 1991-05-17 1992-12-22 General Instrument Corporation Method and apparatus for communicating different categories of data in a single data stream
US5341425A (en) * 1992-12-02 1994-08-23 Scientific Atlanta, Inc. Methods and apparatus for uniquely encrypting data at a plurality of data transmission sites for transmission to a reception site

Also Published As

Publication number Publication date
EP0666694B1 (fr) 2001-10-17
CA2137616A1 (fr) 1995-08-03
DE69428673T2 (de) 2002-07-11
EP0666694A1 (fr) 1995-08-09
JPH08107412A (ja) 1996-04-23
CA2137616C (fr) 2003-04-01
ES2165862T3 (es) 2002-04-01
DE69428673D1 (de) 2001-11-22
NO944678D0 (no) 1994-12-05
AU8150894A (en) 1995-08-10
KR100371833B1 (ko) 2003-04-26
US5504816A (en) 1996-04-02
KR950026251A (ko) 1995-09-18
AU676404B2 (en) 1997-03-06

Similar Documents

Publication Publication Date Title
NO944678L (no) Fremgangsmåte og anordning for å styre tilgang til digitale signaler
GB2334865A (en) An apparatus, system and method for secure, recoverable, adaptably compressed file transfer
TW353174B (en) Apparatus and method for synthesizing information signal and reproduction control signal and information signal recording apparatus
NO980511L (no) Databehandlingssystem
GB2313989B (en) Data encryption
HK1035277A1 (en) Method and apparatus for media data transmission.
GB2261349A (en) Resynchronization of encryption systems upon handoff
CA2234982A1 (fr) Appareil et procede de cryptage de paquets mpeg
ATE444620T1 (de) Selbstgenerierung von zertifikaten unter verwendung eines sicheren mikroprozessors in einer vorrichtung zur digitalen datenübertragung
NO962605L (no) Fremgangsmåte og anordning for å styre operasjonen til en signaldekoder i et kringkastingssystem
AU2506397A (en) Method for providing a secure communication between two devices and application of this method
MY119743A (en) System, method and apparatus for secure transmission of confidential information
EP0763225A4 (fr) Procede et systeme applicable a un appel de procedure a distance passant par un canal de communication non fiable utilisant plusieurs horloges de synchronisation pour la retransmission
PH25629A (en) Method, apparatus for encrypting, decrypting time domain signals
WO2001093457A3 (fr) Procede permettant d'utiliser une capacite de communications excessive
HK1016375A1 (en) Decryption of retransmitted date in an encrypted communication system
NO990569L (no) FremgangsmÕte for signalering, samt digitalt radiosystem
US5161191A (en) Encryption system for time division multiplexed networks
ATE179856T1 (de) Verfahren zum übertragen von datenpaketen über funkkanäle und endgerät dafür
FR2721726B1 (fr) Procédé de contrôle d'une transmission en série de données numériques par une liaison multiplex unifilaire entre des appareils de retraitement de signaux communiquant entre eux.
EP1014632A3 (fr) Procedure et dispositif de commutation pour le transfert des données
WO2003036860A1 (fr) Systeme et procede de commande de dispositif electronique, dispositif electronique et appareil de commande
DK0884869T3 (da) Fremgangsmåde til sikker visning under transmission af data og filer mellem brugere
AR005830A1 (es) Metodo y aparato para mitigar interferencias causadas por un sistema de comunicacion sobrepuesta
AU1339499A (en) A method for modifying the channel impulse response in tdma systems