WO2007037672A1 - Dispositif d'acces conditionnel - Google Patents

Dispositif d'acces conditionnel Download PDF

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Publication number
WO2007037672A1
WO2007037672A1 PCT/MY2006/000014 MY2006000014W WO2007037672A1 WO 2007037672 A1 WO2007037672 A1 WO 2007037672A1 MY 2006000014 W MY2006000014 W MY 2006000014W WO 2007037672 A1 WO2007037672 A1 WO 2007037672A1
Authority
WO
WIPO (PCT)
Prior art keywords
smart card
conditional access
access device
accordance
central controller
Prior art date
Application number
PCT/MY2006/000014
Other languages
English (en)
Inventor
Keng Fei Wong
Faruk Doyan
Original Assignee
Keng Fei Wong
Faruk Doyan
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 Keng Fei Wong, Faruk Doyan filed Critical Keng Fei Wong
Publication of WO2007037672A1 publication Critical patent/WO2007037672A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44231—Monitoring of peripheral device or external card, e.g. to detect processing problems in a handheld device or the failure of an external recording device
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]

Definitions

  • the present invention relates to a conditional access device for use in systems in which access to transmitted data is controlled.
  • the present invention relates to a device that can be utilised at the user end of a conditional access system.
  • the device may be utilised in any system in which access to transmitted data is controlled.
  • One example of such a system is a conditional access television system.
  • conditional access television is implemented at the user's end by installation of a decoder that is used to receive encrypted television content and to decrypt this content for display.
  • a decoder that is used to receive encrypted television content and to decrypt this content for display.
  • the decryption is facilitated by a smart card provided to the authorised user.
  • the smart card is provided with information that allows the decoder to decrypt entitlement management messages (EMMs) sent by the central management device to each authorised decoder.
  • ECMs entitlement management messages
  • the decrypted entitlement management messages provide keys that the decoder may then use to decrypt entitlement control messages (ECMs) 5 thereby providing the control words used to decrypt the encrypted content for display.
  • the standard arrangement of a decoder using an authorised smart card allows only for the decryption and display of one television channel for display on one television. Therefore, if an authorised user would like to view more than one channel at a time, for example if the user has more than one television in their residence, then they will be required to obtain an additional decoder and associated smart card.
  • the present invention attempts to overcome, at least in part, the aforementioned problem.
  • a conditional access device comprising: one or more smart card interface devices each in communication with a smart card reader of an associated decoder, each decoder receiving an incoming transmission including entitlement messages; a central controller in communication with the or each smart card interface device and having a central smart card reader for receiving a central smart card that stores information relating to the entitlements of a user of a conditional access system; wherein the central controller receives data including the entitlement messages from each of the smart card interface devices, synchronises said data and provides said data to the central smart card via the central smart card reader and transmits return signals generated by the central smart card in response to said data to each of the decoders via the smart card interface devices.
  • Figure 1 is a diagrammatic view of a conditional access system incorporating the device of the present invention
  • Figure 2 is a block diagram of the functional elements of a conditional access device in accordance with the present invention.
  • Figure 3 is a block diagram of a conditional access device in accordance with the present invention.
  • Figure 4 is a logic diagram showing the initialisation process of the central controller of the conditional access device 10.
  • conditional access device 10 for use in a system that controls access to transmitted data. It will be appreciated that the device 10 may be utilised in a system transmitting any type of data to which access is controlled. For example, the device may be used in systems transmitting television signals, radio signals, games or any other signals or combinations of such signals. The embodiment described, however, will be in relation to a PayTV system.
  • the system comprises known components of a conditional access television system including a transmitter 12 for transmitting television content from a transmission centre 13.
  • the transmitted content includes encrypted content along with entitlement messages, being entitlement management messages (EMMs) and entitlement control messages (ECMs), in a known manner.
  • EMMs entitlement management messages
  • ECMs entitlement control messages
  • the system also includes a receiving antennna 14 connected to a distributor 16 for distributing the received signals to one or more decoders 18.
  • Each of the decoders 18 is of a known type utilising a smart card, inserted into a smart card reader in the decoder 18, to process the entitlement messages and allow the decoder to decrypt the content for viewing on an associated television 20. hi the embodiment shown in Figure 1, three decoders 18 are provided with associated televisions 20.
  • the conditional access television device 10 is arranged to communicate with each of the decoders 18 in a way that allows each decoder 18 to decrypt the content received for display without the use of a dedicated smart card in each decoder 18.
  • the conditional access television device 10 thereby allows the users to view different channels of the received content at the same time without the need to obtain multiple smart cards.
  • Functional elements of a conditional access television device 10 in accordance with the present invention are shown in Figure 2.
  • a block diagram of a conditional access television device 10 in accordance with the present invention is shown in Figure 3.
  • the conditional access television device 10 comprises a central controller 22, a smart card reader 24 and one or more smart card interface devices 26.
  • the central smart card reader 24 comprises a standard reader device for receiving a central smart card 25 that allows authorisation of encrypted television content transmitted from the transmission centre 13.
  • the central smart card 25 contains information to enable the processing of entitlement messages and thereby allow decryption of the transmitted content.
  • the central smart card reader 24 is in communication with the central controller 22.
  • the function of the central controller 22 is to relay messages between the central smart card 25 and each of the decoders 18.
  • the central controller 24 is therefore provided with one or more I/O interface modules 27, wherein each interface module 27 is connectable to an associated smart card interface device 26.
  • the I/O interface modules 27 are preferably each provided with a connection 28 in the form of an RJ45 connector.
  • the central controller 22 may be directly connected to the I/O interface modules 24, or there may be provided a separate I/O Bus sync module 38, as shown in Figure 2.
  • the I/O bus sync module 38 may provide additional management of the bus signalling and may provide for easier manufacturing and maintenance.
  • Each smart card interface device 26 comprises a card to be inserted into the reader of one the decoders 18.
  • the smart card interface device 26 includes no processor or memory but contains contacts 30 for engaging with the decoder 18 and a connection 32 in the form of an RJ45 connector, as shown in Figure 2.
  • the smart card interface device 26 is thereby connected to the associated I/O interface module 27 by an appropriate connecting cable. Alternatively, the connection to the smart card interface devices 26 may be via suitable wireless means.
  • the conditional access television device 10 is also provided with an audio/video input controller 40 and multiplexer/demultiplexer unit 42 to receive the transmitted data and supply it to the central controller 22 in a known fashion. Further, the conditional access television device 10 may be provided with a user input means 44, for example in the form of a keyboard and display panel to allow appropriate user control of the conditional access television device 10.
  • each of the smart card interface devices 26 is inserted in an associated decoder 18. The signals from the decoder 18 that would usually be intended for a smart card inserted in the reader of the decoder 18 are detected by the contacts 30 and passed via the connecting cable and I/O interface module 27 to the central controller 22.
  • the central controller 22 checks the decoder smart card communication protocols and synchronises those signals with the interface to the central smart card 28 in the central smart card reader 25 such that data and requests to the readers in each of the decoders are routed to the smart card 28 and appropriate return signals provided back to each decoder 18.
  • each of the central controller 22 and the FO interface modules 27 contain appropriate synchronisation means and buffering to enable correct synchronised operation.
  • the central controller 22 checks that the central smart card 25 is inserted into the central smart card reader 24.
  • the central controller 22 further checks that the smart card interface devices 26 are inserted into the associated decoders 18 and if so, waits for an appropriate reset command from each of the decoders 18 before enabling the central controller 22 in a read and update mode, in which data is provided between the smart card 28 and each of the decoders 18 in a synchronised manner.
  • the service provider would be able to increase the number of viewers without the necessity of producing and monitoring additional smart cards or changing any of the existing infrastructure.
  • the device may also be used for obtaining more accurate information on viewership data by tracking on the slave cards.
  • the present invention may provide a better alternative by introducing a distance limitation to the system such that only televisions within a predefined distance from the central controller are operable. This would prevent users reselling services to neighbours. It may also be desirable to limit the quantity of decoders with slave cards that can be linked to the device. Further, for further control, it may be desirable to issue special smart cards which denote that they are used with the multiple decoder set up provided by the present invention.
  • conditional access television device 10 may be in any form to provide sufficient functionality to perform the tasks as described above.
  • the central smart card reader 24, the central controller 22 and I/O interface modules 27 will be constructed on a single printed circuit board having the required microprocessors and circuitry.
  • the conditional access television device 10 may then be operated by insertion of the central smart card 25 into the central smart card reader 24 and connection of the smart card interface devices 26 to the decoders 18 by the connecting cables.
  • the arrangement may be implemented on a personal computer with suitable peripheral hardware and appropriate software.

Landscapes

  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'accès conditionnel comprenant un ou plusieurs dispositifs d'interfaces pour cartes à puces et un contrôleur central. Les dispositifs d'interfaces pour cartes à puces sont chacun en communication avec un lecteur de carte à puce d'un décodeur associé recevant une transmission entrante comprenant des messages d'habilitation. Le contrôleur central est en communication avec chaque dispositif d'interface pour carte à puce et présente un lecteur de carte à puce destiné à recevoir une carte à puce qui stocke des informations relatives aux habilitations d'un utilisateur d'un système d'accès conditionnel. Le contrôleur central reçoit des données comprenant les messages d'habilitation de chacun des dispositifs d'interfaces pour cartes à puces, synchronise lesdites données et fournit lesdites données à la carte à puce via le lecteur de carte à puce et transmet des signaux de retour générés en réponse auxdites données de la carte à puce vers chacun des décodeurs via les dispositifs d'interfaces pour cartes à puces.
PCT/MY2006/000014 2005-09-30 2006-09-29 Dispositif d'acces conditionnel WO2007037672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20054617 MY151813A (en) 2005-09-30 2005-09-30 A conditional access device
MYPI20054617 2005-09-30

Publications (1)

Publication Number Publication Date
WO2007037672A1 true WO2007037672A1 (fr) 2007-04-05

Family

ID=37900030

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2006/000014 WO2007037672A1 (fr) 2005-09-30 2006-09-29 Dispositif d'acces conditionnel

Country Status (2)

Country Link
MY (1) MY151813A (fr)
WO (1) WO2007037672A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010149161A1 (fr) * 2009-06-24 2010-12-29 Smartwi International A/S Système de contrôle d'accès
WO2012146973A3 (fr) * 2011-04-29 2013-01-03 Sky Italia S.R.L. Dispositif de traitement et procédé de génération d'un code de vérification

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334361A (en) * 1997-09-29 1999-08-18 Nds Ltd A portable subscriber unit for controlling access to television transmissions via wireless communication
US6424947B1 (en) * 1997-09-29 2002-07-23 Nds Limited Distributed IRD system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334361A (en) * 1997-09-29 1999-08-18 Nds Ltd A portable subscriber unit for controlling access to television transmissions via wireless communication
US6424947B1 (en) * 1997-09-29 2002-07-23 Nds Limited Distributed IRD system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010149161A1 (fr) * 2009-06-24 2010-12-29 Smartwi International A/S Système de contrôle d'accès
WO2012146973A3 (fr) * 2011-04-29 2013-01-03 Sky Italia S.R.L. Dispositif de traitement et procédé de génération d'un code de vérification

Also Published As

Publication number Publication date
MY151813A (en) 2014-07-14

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