EP1316205A2 - Appareil adaptateur pour radiodiffusion videonumerique - Google Patents

Appareil adaptateur pour radiodiffusion videonumerique

Info

Publication number
EP1316205A2
EP1316205A2 EP01976210A EP01976210A EP1316205A2 EP 1316205 A2 EP1316205 A2 EP 1316205A2 EP 01976210 A EP01976210 A EP 01976210A EP 01976210 A EP01976210 A EP 01976210A EP 1316205 A2 EP1316205 A2 EP 1316205A2
Authority
EP
European Patent Office
Prior art keywords
cam
slot
control unit
adapter device
sensor
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.)
Withdrawn
Application number
EP01976210A
Other languages
German (de)
English (en)
Inventor
Chin Bong Ng
Chia Her Goh
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.)
Identiv GmbH
Original Assignee
SCM Microsystems GmbH
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 SCM Microsystems GmbH filed Critical SCM Microsystems GmbH
Publication of EP1316205A2 publication Critical patent/EP1316205A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • 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]
    • H04N21/40—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
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • 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 invention relates to an adapter device for receiving digital audiovisual programs with a control unit with at least one interface to an audiovisual output device, at least one slot for a conditional access module (CAM), by means of which encrypted programs can be decrypted, a bidirectional data bus between the control unit and the slot, and with control lines, between the control unit and the slot.
  • CAM conditional access module
  • Such adapter devices are particularly used as an add-on for television receivers under the name of set-top boxes. They expand the functions of the television receiver to include access to encrypted audiovisual programs against payment (Pay-TN).
  • Payment-TN The decryption of the programs and the checking of the access authorization take place in a so-called conditional access module, whereby the type of encryption and the access authorization differ with the individual providers.
  • conditional access module whereby the type of encryption and the access authorization differ with the individual providers.
  • slots are provided, into which CAM from different providers can be inserted in order to enable the reception of different programs.
  • the set-top boxes are often offered to the consumer by a specific program provider who at the same time delivers the appropriate CAM for his program.
  • the slot and plug-in module are a not insignificant cost factor in the overall calculation of the set-top box.
  • the object of the invention is therefore to create an adapter device for receiving digital audiovisual programs in which the availability of provider-specific programs is achieved in a simple and inexpensive manner.
  • a permanently installed CAM which is connected to the data bus, a sensor for detecting a CAM inserted in the slot, and a changeover switch, which connects the control lines either to the slot or to the permanently installed CAM , intended.
  • the permanently installed CAM provides the adapter device with the availability of certain programs. With a permanently installed CAM, the adapter device is much cheaper than if an insertable CAM has to be attached to it.
  • the slot for an additional plug-in CAM gives the user the opportunity to access other programs via the same adapter device.
  • the changeover switch connected to the sensor automatically connects to an additionally inserted CAM, so that no further operating steps are required by the user.
  • the automatic switchover also allows existing adapter devices that only have one slot to be equipped with a permanently installed CAM without having to change the program of the control unit, since only one CAM for the control unit, the permanently installed one or an inserted one, if applicable , appears.
  • FIG. 1 shows a block diagram of an adapter device according to the invention
  • Figure 2 shows the time course of some control signals when plugged in
  • the adapter device 10 shown in FIG. 1 has a control unit 12 with an interface 14 to an audiovisual output device 16, for example in a television receiver or a multimedia-compatible PC can exist.
  • the adapter device 10 also includes a permanently installed conditional access module (CAM) 20, which is connected to the control unit 12 via a bidirectional data bus 22.
  • CAM conditional access module
  • the adapter device 10 has a slot 24 for an external plug-in CAM 26, which is also connected to the control unit 12 via the data bus 22.
  • Control lines 30, connect the control unit 12 to the slot 24 or the internal CAM 20 via four changeover switches, which in this embodiment are designed as multiplexers 32.
  • the control input of the multiplexer 32 is from a sensor 34 controlled via the control line CD.
  • the sensor 34 detects when a CAM 26 is inserted in the slot 24.
  • the sensor can be designed as a mechanical switch that is actuated when a CAM is inserted into the slot 24.
  • any other sensor can be used that can detect the presence or insertion of a CAM in the slot 24, be it in a mechanical, optical magnetic or other way, for example by monitoring the current flow in the supply lines of the slot.
  • a pulse generator 36 Via the control line CD, a pulse generator 36 is also controlled, which is integrated here in the multiplexer 32 and which sends a defined pulse on the control line CD ** to the control unit 12 both when the external CAM 26 is inserted and when it is removed.
  • the control unit 12 receives an encrypted data stream from the television receiver 16. It is assumed below that the television receiver 16 receives the encrypted program via antenna, cable, satellite or a similar medium and passes it on to the adapter device 10 via the interface 14. Without restricting the invention, however, the adapter device 10 can also be equipped with its own receiver, or the adapter device 10 can be integrated in the television receiver.
  • the control unit 12 transmits the encrypted data stream via the data bus 22 to the built-in CAM 20, which decrypts the data and via the data bus 22 again to the control unit 12 for output to the television receiver 16.
  • the built-in CAM 20 can disadvantageously be equipped with an interface 40 for a smart card 42 on which the access authorization data of the user are located.
  • the control unit 12 controls the function of the CAM 20 by means of the control lines 30, which are connected to the CAM 20 via the multiplexers 32.
  • FIG. 2 shows the time course of the signals on part of the control lines when an external CAM is inserted and removed, the signals being provided with the reference symbols of the corresponding control lines from FIG. 1.
  • the time of insertion is designated in Fig. 2 with Tl, the time of removal with T2.
  • the sensor 34 detects an inserted CAM 26, it sets the signal on the control line CD from T to O '(item 50 in FIG. 2).
  • This signal edge causes the pulse generator 36 to send a short pulse 52 to the control unit 12 on the CD ** line.
  • the signal edge on the CD line causes the multiplexer 32 to switch.
  • control lines from the control unit 12 to the internal CAM 20 are thus interrupted. Instead, the WAIT and IRQ lines from slot 24 are connected to the corresponding inputs on control unit 12. In contrast, the signal lines RST and CE leading away from the control unit are no longer connected to the signal lines RST_CAM or CE_CAM to the internal CAM 20, but only to the slot 24. The RST and CE lines to the slot 24 are not via the multiplexer 32 because they are exposed at slot 24 anyway if no external CAM 26 is inserted.
  • the control lines RST_CAM and CE_CAM to the internal CAM 20 are now connected via the multiplexer 32 to a fixed potential which corresponds to the signal of a logical T, so that the signal '1' is present at the corresponding inputs of the internal CAM 20 (item 54 , 56 in Fig. 2). As a result, the internal CAM 20 is disabled.
  • the internal CAM can be used independently of the Initialization sequence had previously been switched off by the control unit 12 via the T signal on the line CE, which is indicated in FIG. 2 by the alternatively possible signal edges 60.
  • the falling edge of pulse 52 on the CD ** line stimulates control unit 12 to carry out an initialization sequence.
  • This initialization sequence begins with the control unit 12 performing a reset internally. After this reset has been completed, the control unit 12 outputs a short pulse 62 on the RST line, with the falling edge of which a CAM can be reset. Since the external CAM 26 is now plugged into the slot 24, it is reset. The function of the CAM 26 is then released by the control unit 12 by an 'O'-signal on the CE line.
  • the described initialization sequence of the control unit 12 is the same as in conventional adapter devices, in which the control unit and the CAM are also reset when the CAM plug-in card is changed.
  • the sensor 34 sets the signal on the CD line from '0' to T (item 64 in FIG. 2), as a result of which the multiplexer 32 switches over and the pulse generator 36 again generates a short pulse 66 sends on the CD ** line to the control unit 12.
  • the control unit 12 replies with a as described previously
  • a plurality of slots for external CAM can also be provided in a second embodiment of the adapter device according to the invention.
  • an internal CAM is connected to one of the slots, as described in the first embodiment.
  • the internal CAM is then switched off when an external CAM is inserted in this slot, otherwise it is managed in parallel with the CAM possibly inserted in the other slots, just like an external CAM inserted in this slot.
  • an internal CAM can also be provided in the case of adapter devices with a plurality of slots, without changes to the control unit being necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

L'invention concerne un appareil adaptateur (10) pour la réception de programmes audiovisuels numériques. Cet appareil comprend une unité de commande (12) comportant au moins une interface (14) reliée à une unité de sortie audiovisuelle (16), au moins un point de branchement (24) pour un module d'accès conditionnel (CAM) (26) permettant de décoder des programmes codés, un bus de données bidirectionnel (22) situé entre l'unité de commande et ledit point de branchement, ainsi que des lignes de commande (30) situées entre l'unité de commande et le point de branchement. Selon l'invention, cet appareil comprend également un CAM (20) intégré à demeure et relié au bus de données, un capteur (34) pour détecter un CAM inséré dans le point de branchement, ainsi qu'un commutateur (32) qui, en fonction d'un signal du capteur (34), relie les lignes de commande au point de branchement ou au CAM intégré à demeure.
EP01976210A 2000-09-08 2001-09-10 Appareil adaptateur pour radiodiffusion videonumerique Withdrawn EP1316205A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10044386A DE10044386A1 (de) 2000-09-08 2000-09-08 Adaptergerät für DVB
DE10044386 2000-09-08
PCT/EP2001/010445 WO2002021827A2 (fr) 2000-09-08 2001-09-10 Appareil adaptateur pour radiodiffusion videonumerique

Publications (1)

Publication Number Publication Date
EP1316205A2 true EP1316205A2 (fr) 2003-06-04

Family

ID=7655469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01976210A Withdrawn EP1316205A2 (fr) 2000-09-08 2001-09-10 Appareil adaptateur pour radiodiffusion videonumerique

Country Status (6)

Country Link
EP (1) EP1316205A2 (fr)
KR (1) KR20030029944A (fr)
CN (1) CN1468491A (fr)
AU (1) AU2001295552A1 (fr)
DE (1) DE10044386A1 (fr)
WO (1) WO2002021827A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060288A1 (de) * 2005-12-15 2007-06-21 Technisat Digital Gmbh Verfahren und Anordnung zum Betrieb eines Entschlüsselungssystems in einem digital Receiver
DE102005060287B4 (de) * 2005-12-15 2007-10-11 Technisat Digital Gmbh Verfahren zum Betrieb eines Systems mit bedingtem Zugang
DE102006016121B8 (de) * 2006-04-05 2007-12-20 Technisat Digital Gmbh Verfahren und Anordnung zur Aktualisierung der Software einer digitalen Rundfunkempfangseinrichtung
KR100840579B1 (ko) * 2007-01-11 2008-06-23 주식회사 대우일렉트로닉스 디지털 방송 신호의 조건부 액세스 장치와 그 운용 방법
KR101344124B1 (ko) * 2007-05-09 2014-01-15 소니 주식회사 인터페이스 어댑터 장치 및 디지털 텔레비전 수신 장치
DE102009036214A1 (de) 2009-08-05 2011-02-10 Giesecke & Devrient Gmbh Tragbarer Datenträger mit einem Dekoder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5237610A (en) * 1990-02-01 1993-08-17 Scientific-Atlanta, Inc. Independent external security module for a digitally upgradeable television signal decoder
IL111151A (en) * 1994-10-03 1998-09-24 News Datacom Ltd Secure access systems
WO1996008912A2 (fr) * 1994-09-09 1996-03-21 Titan Information Systems Corporation Systeme d'acces conditionnel
US5590202A (en) * 1995-01-18 1996-12-31 Zenith Electronics Corporation Countdown system for conditional access module
GB2332314B (en) * 1997-12-09 2001-05-16 Sony Uk Ltd Interface for a receiver and method of arrangement thereof
US6040851A (en) * 1998-01-20 2000-03-21 Conexant Systems, Inc. Small-format subsystem for broadband communication services
WO2000031956A2 (fr) * 1998-11-25 2000-06-02 Sony Electronics, Inc. Procede et appareil permettant d'acceder a des programmes numeriques memorises

Non-Patent Citations (1)

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Title
See references of WO0221827A2 *

Also Published As

Publication number Publication date
WO2002021827A2 (fr) 2002-03-14
WO2002021827A3 (fr) 2002-09-19
KR20030029944A (ko) 2003-04-16
AU2001295552A1 (en) 2002-03-22
CN1468491A (zh) 2004-01-14
DE10044386A1 (de) 2002-04-04

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