WO2002021827A2 - Adapter device for dvb - Google Patents

Adapter device for dvb Download PDF

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Publication number
WO2002021827A2
WO2002021827A2 PCT/EP2001/010445 EP0110445W WO0221827A2 WO 2002021827 A2 WO2002021827 A2 WO 2002021827A2 EP 0110445 W EP0110445 W EP 0110445W WO 0221827 A2 WO0221827 A2 WO 0221827A2
Authority
WO
WIPO (PCT)
Prior art keywords
cam
slot
control unit
adapter device
sensor
Prior art date
Application number
PCT/EP2001/010445
Other languages
German (de)
French (fr)
Other versions
WO2002021827A3 (en
Inventor
Chin Bong Ng
Chia Her Goh
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
Priority to AU2001295552A priority Critical patent/AU2001295552A1/en
Priority to KR10-2003-7003387A priority patent/KR20030029944A/en
Priority to EP01976210A priority patent/EP1316205A2/en
Publication of WO2002021827A2 publication Critical patent/WO2002021827A2/en
Publication of WO2002021827A3 publication Critical patent/WO2002021827A3/en

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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, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 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.

Abstract

The invention relates to an adapter device (10) for receiving digital audio-visual programmes. Said device comprises a control unit (12) having at least one interface (14) to an audio-visual output device (16), at least one slot (24) for a Conditional Access Module (CAM) (26) by means of which encoded programmes can be decoded, a two-directional data bus (22) arranged between the control unit and the slot, and control lines (30) arranged between the control unit and the slot. According to the invention, the device also comprises a CAM (20) which is integrated in a fixed manner and connected to the data bus, a sensor (34) for detecting a CAM which is inserted into the slot, and a commutator (32) connecting the control lines either to the slot or to the CAM which is integrated in a fixed manner, according to a signal from the sensor (34).

Description

Adaptergerät für DNB Adapter device for DNB
Die Erfindung betrifft ein Adaptergerät für den Empfang digitaler audiovisueller Programme mit einer Steuereinheit mit wenigstens einer Schnittstelle zu einem audiovisuellen Ausgabegerät, mindestens einem Steckplatz für ein Conditional Access Modul (CAM), mittels welchem verschlüsselte Programme entschlüsselt werden können, einem bidirektionalen Datenbus zwischen der Steuereinheit und dem Steckplatz, und mit Steuerleitungen, zwischen der Steuereinheit und dem Steckplatz.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.
Derartige Adaptergeräte sind insbesondere als Zusatz für Fernsehempfänger unter der Bezeichnung Set-Top-Boxen gebräuchlich. Sie erweitern die Funktionen des Fernsehempfangers um den Zugang zu verschlüsselten audiovisuellen Programmen gegen Bezahlung (Pay-TN). Die Entschlüsselung der Programme und die Prüfung der Zugangsberechtigung finden in einem sogenannten Conditional Access Modul statt, wobei sich die Nerschlüsselungsart und die Zugangsberechtigung bei den einzelnen Anbietern unterscheiden. Bei den bisherigen Set-Top-Boxen sind Steckplätze vorgesehen, in die CAM verschiedener Anbieter eingesteckt werden können, um damit den Empfang verschiedener Programme zu ermöglichen. Dem Konsumenten werden die Set- Top-Boxen häufig von einem bestimmten Programmanbieter, der gleichzeitig das für sein Programm passende CAM mitliefert, angeboten. Steckplatz und Steckmodul sind jedoch in der Gesamtkalkulation der Set-Top-Box ein nicht zu vernachlässigender Kostenfaktor.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). 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. With the previous set-top boxes, 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. However, the slot and plug-in module are a not insignificant cost factor in the overall calculation of the set-top box.
Der Erfindung stellt sich daher die Aufgabe, ein Adaptergerät für den Empfang digitaler audiovisueller Programme zu schaffen, bei dem die Verfügbarkeit anbieterspezifischer Programme auf einfache und kostengünstige Weise erreicht ist. Zu diesem Zweck sind bei einem Adaptergerät der eingangs genannten Art ein fest eingebautes CAM, das an dem Datenbus angeschlossen ist, ein Sensor zur Erkennung eines im Steckplatz eingesteckten CAM und ein Umschalter, der die Steuerleitungen entweder mit dem Steckplatz oder mit dem fest eingebauten CAM verbindet, vorgesehen. Durch das fest eingebaute CAM ist dem Adaptergerät die Verfügbarkeit bestimmter Programme vorgegeben. Mit einem fest eingebauten CAM ist das Adaptergerät wesentlich kostengünstiger, als wenn ihm ein einsteckbares CAM beigefügt werden muß. Andererseits bleibt aber durch den Steckplatz für ein zusätzliches steckbares CAM dem Benutzer die Möglichkeit, über dasselbe Adaptergerät sich Zugang zu anderen Programmen zu verschaffen. Dabei erfolgt durch den mit dem Sensor verbundenen Umschalter automatisch die Verbindung mit einem zusätzlich eingesteckten CAM, so daß vom Benutzer keine weiteren Bedienschritte erforderlich sind. Die automatische Umschaltung gestattet es weiterhin, bereits vorhandene Adaptergeräte, die lediglich über einen Steckplatz verfügen, mit einem fest eingebauten CAM auszurüsten, ohne das Programm der Steuereinheit verändern zu müssen, da für die Steuereinheit jeweils nur ein CAM, das fest eingebaute oder ein gegebenenfalls eingestecktes, in Erscheinung tritt.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. For this purpose, in an adapter device of the type mentioned at the outset, 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. On the other hand, 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.
Weitere Ausfuhrungsformen der Erfindung und deren Vorteile ergeben sich aus den Unteransprüchen.Further embodiments of the invention and their advantages result from the subclaims.
Die Erfindung wird nachfolgend ausführlicher anhand einer Ausführungsform unter Bezug auf die beigefügten Zeichnungen beschrieben. In den Zeichnungen zeigt:The invention is described in more detail below using an embodiment with reference to the accompanying drawings. In the drawings:
Figur 1 ein Blockschaltbild eines erfmdungsgemäßen Adaptergerätes und1 shows a block diagram of an adapter device according to the invention and
Figur 2 den zeitlichen Verlauf einiger Steuersignale beim Einstecken und beimFigure 2 shows the time course of some control signals when plugged in and
Entfernen des externen CAM.Remove the external CAM.
Das in Figur 1 dargestellte Adaptergerät 10 weist eine Steuereinheit 12 mit einer Schnittstelle 14 zu einem audiovisuellen Ausgabegerät 16 auf, das beispielsweise in einem Fernsehempfänger oder einem Multimedia-geeigneten PC bestehen kann. Das Adaptergerät 10 beinhaltet außerdem ein fest eingebautes Conditional Access Modul (CAM) 20, das über einen bidirektionalen Datenbus 22 mit der Steuereinheit 12 verbunden ist. Weiterhin weist das Adaptergerät 10 einen Steckplatz 24 für ein externes steckbares CAM 26 auf, der ebenfalls über den Datenbus 22 mit der Steuereinheit 12 verbunden ist. Steuerleitungen 30, deren Bedeutung im einzelnen weiter unten erklärt wird, verbinden die Steuereinheit 12 über vier Umschalter, die in dieser Ausführungsform als Multiplexer 32 ausgeführt sind, wahlweise mit dem Steckplatz 24 oder dem internen CAM 20. Der Steuereingang des Multiplexers 32 wird von einem Sensor 34 über die Steuerleitung CD angesteuert. Der Sensor 34 erkennt, wenn ein CAM 26 im Steckplatz 24 eingesteckt ist. Der Sensor kann im einfachsten Fall als mechanischer Schalter ausgebildet sein, der betätigt ist, wenn ein CAM in den Steckplatz 24 eingesteckt ist. Alternativ ist aber auch jeder andere Sensor verwendbar, der das Vorhandensein oder das Einstecken eines CAM im Steckplatz 24 erkennen kann, sei es auf mechanische, optische magnetische oder sonstige Art, beispielsweise durch Überwachung des Stromflusses in den Nersorgungsleitungen des Steckplatzes. Über die Steuerleitung CD wird weiterhin ein Pulsgenerator 36 angesteuert, der hier im Multiplexer 32 integriert ist und der sowohl beim Einstecken des externen CAM 26 als auch beim Entfernen desselben jeweils einen definierten Impuls auf einer Steuerleitung CD ** an die Steuereinheit 12 sendet.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. Furthermore, 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, the meaning of which is explained in more detail below, 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. In the simplest case, the sensor can be designed as a mechanical switch that is actuated when a CAM is inserted into the slot 24. Alternatively, however, 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. 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.
Im internen Betrieb, das heißt wenn kein externes CAM 26 eingesteckt ist, erhält die Steuereinheit 12 vom Fernsehempfanger 16 einen verschlüsselten Datenstrom. Es wird im folgenden davon ausgegangen, daß der Fernsehempfänger 16 das verschlüsselte Programm über Antenne, Kabel, Satellit oder ein ähnliches Medium empfängt und über die Schnittstelle 14 an das Adaptergerät 10 weitergibt. Ohne Einschränkung der Erfindung kann das Adaptergerät 10 jedoch auch mit einem eigenen Empfänger ausgerüstet sein, oder das Adaptergerät 10 kann in dem Fernsehempfänger integriert sein. Die Steuereinheit 12 gibt den verschlüsselten Datenstrom über den Datenbus 22 an das eingebaute CAM 20, welches die Daten entschlüsselt und über den Datenbus 22 wieder an die Steuereinheit 12 zur Ausgabe an den Fernsehempfänger 16 weitergibt. Norteilhaft kann das eingebaute CAM 20 mit einer Schnittstelle 40 für eine Smartcard 42 ausgerüstet sein, auf welcher sich die Zugangsberechtigungsdaten des Benutzers befinden. Die Steuereinheit 12 steuert die Funktion des CAM 20 mittels der Steuerleitungen 30, die über die Multiplexer 32 am CAM 20 angeschlossen sind.In internal operation, ie when no external CAM 26 is inserted, 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.
Das Einstecken eines vorzugsweise ebenfalls mit einer Schnittstelle für eine Smartcard 42' versehenen externen CAMs, in den Steckplatz 24 erkennt der Sensor 34. In Figur 2 ist der zeitliche Verlauf der Signale auf einem Teil der Steuerleitungen beim Einstecken und beim Entfernen eines externen CAMs dargestellt, wobei die Signale mit den Bezugszeichen der entsprechenden Steuerleitungen aus Fig. 1 versehen sind. Der Zeitpunkt des Einsteckens ist in Fig. 2 mit Tl bezeichnet, der Zeitpunkt des Entfernens mit T2. Wenn der Sensor 34 ein eingestecktes CAM 26 erkennt, setzt er das Signal auf der Steuerleitung CD von T auf O' (Pos. 50 in Fig. 2). Der Pulsgenerator 36 wird durch diese Signalflanke veranlaßt, auf der CD **-Leitung einen kurzen Impuls 52 an die Steuereinheit 12 zu senden. Gleichzeitig bewirkt die Signalflanke auf der CD- Leitung das Umschalten des Multiplexers 32. Damit sind die Steuerleitungen von der Steuereinheit 12 zum internen CAM 20 unterbrochen. Stattdessen sind die WAIT- und IRQ-Leitungen von dem Steckplatz 24 mit den entsprechenden Eingängen an der Steuereinheit 12 verbunden. Dagegen sind die von der Steuereinheit wegführenden Signalleitungen RST und CE nicht mehr mit den Signalleitungen RST_CAM bzw. CE_CAM zum internen CAM 20 verbunden, sondern nur noch mit dem Steckplatz 24. Die RST- und CE-Leitungen zum Steckplatz 24 werden nicht über den Multiplexer 32 geführt, da sie am Steckplatz 24 sowieso freiliegen, wenn kein externes CAM 26 eingesteckt ist. Die Steuerleitungen RST_CAM und CE_CAM zum internen CAM 20 sind jetzt über den Multiplexer 32 mit einem festen Potential, das dem Signal einer logischen T entspricht, verbunden, so daß an den entsprechenden Eingängen des internen CAM 20 das Signal '1' anliegt (Pos. 54, 56 in Fig. 2). Dadurch ist das interne CAM 20 außer Funktion gesetzt. Das interne CAM kann unabhängig von der Initialisierungssequenz bereits vorher von der Steuereinheit 12 über T Signal auf der Leitung CE abgeschaltet worden sein, was in Fig. 2 durch die alternativ möglichen Signalflanken 60 angedeutet ist.The insertion of an external CAM, preferably also provided with an interface for a smart card 42 ', into the slot 24 is recognized by the sensor 34. 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. When 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. At the same time, the signal edge on the CD line causes the multiplexer 32 to switch. The 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.
Durch die abfallende Flanke des Impulses 52 auf der CD ** -Leitung wird die Steuereinheit 12 zur Durchführung einer Imtialisierungssequenz angeregt. Diese Initialisierungssequenz beginnt damit, daß die Steuereinheit 12 intern einen Reset ausführt. Nachdem dieser Reset abgeschlossen ist, gibt die Steuereinheit 12 auf der RST-Leitung einen kurzen Impuls 62 aus, mit dessen abfallender Flanke ein CAM zurückgesetzt werden kann. Da am Steckplatz 24 nun das externe CAM 26 eingesteckt ist, wird dieses zurückgesetzt. Anschließend wird durch ein 'O'-Signal auf der CE-Leitung von der Steuereinheit 12 die Funktion des CAM 26 freigegeben. Die beschriebene Initialisierungssequenz der Steuereinheit 12 ist dieselbe, wie bei herkömmlichen Adaptergeräten, bei denen ebenfalls bei einem Wechsel der CAM-Steckkarte die Steuereinheit und das CAM zurückgesetzt werden.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.
Beim Entfernen des externen CAM 26 (T2) setzt der Sensor 34 das Signal auf der CD-Leitung von '0' nach T (Pos. 64 in Fig. 2), wodurch der Multiplexer 32 umschaltet und der Pulsgenerator 36 wiederum einen kurzen Impuls 66 auf der CD ** -Leitung an die Steuereinheit 12 sendet.When the external CAM 26 (T2) is removed, 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.
Die Steuereinheit 12 antwortet wie vorher beschrieben mit einerThe control unit 12 replies with a as described previously
Initialisierungssequenz. Da in diesem Fall jedoch die RST_CAM- und die CE_CAM-Leitungen zum internen CAM 20 über den Multiplexer 32 mit den RST- bzw. CE-Steuerleitungen von der Steuereinheit 12 verbunden sind, wird diesmal durch den Impuls 68 das interne CAM 20 zurückgesetzt und dessen Funktion durch das O'-Signal auf der CE bzw. CE_CAM-Leitung freigegeben. Die Freigabe des internen CAM kann unabhängig von der Initialisierungssequenz auch erst später erfolgen, was in Fig. 2 wiederum durch alternativ mögliche Signalflanken 70 angedeutet ist. Für den Betrieb der Steuereinheit 12 besteht kein Unterschied, ob ein internesInitialization sequence. However, since in this case the RST_CAM and the CE_CAM lines to the internal CAM 20 are connected to the RST and CE control lines from the control unit 12 via the multiplexer 32, this time the internal CAM 20 is reset by the pulse 68 and its Function enabled by the O'signal on the CE or CE_CAM line. Independent of the initialization sequence, the internal CAM can also be released later, which is again indicated in FIG. 2 by alternatively possible signal edges 70. For the operation of the control unit 12, there is no difference whether an internal one
CAM 20 oder ein externes CAM 26 angeschlossen ist. Daher läßt sich zurCAM 20 or an external CAM 26 is connected. Therefore, the
Herstellung des erfindungsgemäßen Adaptergerätes 10 eine herkömmlicheProduction of the adapter device 10 according to the invention a conventional one
Steuereinheit verwenden, wie sie in den bekannten Adaptergeräten mit einem Steckplatz Verwendung findet.Use control unit as it is used in the known adapter devices with a slot.
Damit ergibt sich eine erhebliche Kosteneinsparung beim Design und der Herstellung eines erfindungsgemäßen Adaptergerätes.This results in considerable cost savings in the design and manufacture of an adapter device according to the invention.
Weiterhin können in einer zweiten Ausführungsform des erfmdungsgemäßen Adaptergerätes auch mehrere Steckplätze für externe CAM vorgesehen sein. Dazu wird einem der Steckplätze ein internes CAM beigeschaltet, wie in der ersten Ausfuhrungsform beschrieben. Das interne CAM wird dann abgeschaltet, wenn in diesen Steckplatz ein externes CAM gesteckt ist, ansonsten wird es zusammen mit dem eventuell in den anderen Steckplätzen eingesteckten CAM parallel verwaltet, genauso wie ein in diesen Steckplatz eingestecktes externes CAM. Auf diese Weise kann auch bei Adaptergeräten mit mehreren Steckplätzen ein internes CAM vorgesehen werden ohne daß an der Steuereinheit Veränderungen erforderlich sind. Furthermore, a plurality of slots for external CAM can also be provided in a second embodiment of the adapter device according to the invention. For this purpose, 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. In this way, 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.

Claims

Patentansprüche claims
1. Adaptergerät (10) für den Empfang digitaler audiovisueller Programme mit1. Adapter device (10) for receiving digital audiovisual programs with
- einer Steuereinheit (12) mit wenigstens einer Schnittstelle (14) zu einem audiovisuellen Ausgabegerät (16),- a control unit (12) with at least one interface (14) to an audiovisual output device (16),
- mindestens einem Steckplatz (24) für ein Conditional Access Modul (CAM) (26) mittels welchem verschlüsselte Programme entschlüsselt werden können,- at least one slot (24) for a conditional access module (CAM) (26) by means of which encrypted programs can be decrypted,
- einem bidirektionalen Datenbus (22) zwischen der Steuereinheit und dem Steckplatz, - Steuerleitungen (30), zwischen der Steuereinheit und dem Steckplatz, gekennzeichnet durch- A bidirectional data bus (22) between the control unit and the slot, - Control lines (30), between the control unit and the slot, characterized by
- ein fest eingebautes CAM (20), das an dem Datenbus angeschlossen ist,a permanently installed CAM (20) which is connected to the data bus,
- einen Sensor (34) zur Erkennung eines im Steckplatz eingesteckten CAM und- A sensor (34) for detecting a CAM and inserted in the slot
- einen Umschalter (32), der die Steuerleitungen in Abhängigkeit von einem Signal des Sensors (34) entweder mit dem Steckplatz oder mit dem fest eingebauten CAM verbindet.- A changeover switch (32) which, depending on a signal from the sensor (34), connects the control lines either to the slot or to the permanently installed CAM.
2. Adapter gerät nach Anspruch 1, dadurch gekennzeichnet, daß das fest eingebaute CAM (20) einen Steckplatz (40) für eine Smart Card (42) aufweist.2. Adapter device according to claim 1, characterized in that the permanently installed CAM (20) has a slot (40) for a smart card (42).
3. Adaptergerät nach Anspruch 1, dadurch gekennzeichnet, daß der Umschalter (32) ein Multiplexer ist, der von dem Sensor (34) gesteuert wird und die Steuerleitungen (30) entweder mit dem Steckplatz (24) verbindet, wenn der Sensor ein im Steckplatz eingestecktes CAM (26) erkannt hat, oder die Steuerleitungen mit dem fest eingebauten CAM (20) verbindet, wenn kein CAM im Steckplatz eingesteckt ist. 3. Adapter device according to claim 1, characterized in that the changeover switch (32) is a multiplexer which is controlled by the sensor (34) and the control lines (30) either connect to the slot (24) when the sensor is in the slot has recognized inserted CAM (26), or connects the control lines with the permanently installed CAM (20) if no CAM is inserted in the slot.
4. Adaptergerät nach Anspruch 1, dadurch gekennzeichnet, daß mehrere Steckplätze für mehrere CAMs vorhanden sind.4. Adapter device according to claim 1, characterized in that several slots are available for several CAMs.
5. Adaptergerät nach Anspruch 1, dadurch gekennzeichnet, daß ein Pulsgenerator (36) vorgesehen ist, der mit dem Sensor (34) verbunden ist und einen Impuls (52, 66) an die Steuereinheit (12) sendet, wenn ein CAM (26) eingesteckt oder entfernt wird. 5. Adapter device according to claim 1, characterized in that a pulse generator (36) is provided which is connected to the sensor (34) and sends a pulse (52, 66) to the control unit (12) when a CAM (26) inserted or removed.
PCT/EP2001/010445 2000-09-08 2001-09-10 Adapter device for dvb WO2002021827A2 (en)

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AU2001295552A AU2001295552A1 (en) 2000-09-08 2001-09-10 Adapter device for dvb
KR10-2003-7003387A KR20030029944A (en) 2000-09-08 2001-09-10 Adapter device for dvb
EP01976210A EP1316205A2 (en) 2000-09-08 2001-09-10 Adapter device for dvb

Applications Claiming Priority (2)

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DE10044386A DE10044386A1 (en) 2000-09-08 2000-09-08 Adapter device for DVB

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DE102005060287B4 (en) * 2005-12-15 2007-10-11 Technisat Digital Gmbh Method of operating a conditional access system
DE102006016121B8 (en) * 2006-04-05 2007-12-20 Technisat Digital Gmbh Method and arrangement for updating the software of a digital radio receiving device
KR100840579B1 (en) * 2007-01-11 2008-06-23 주식회사 대우일렉트로닉스 Conditional access apparatus for digital broadcasting signal and operating method therefor
JP5349459B2 (en) * 2007-05-09 2013-11-20 ソニー株式会社 Service card adapter
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WO2002021827A3 (en) 2002-09-19
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AU2001295552A1 (en) 2002-03-22
EP1316205A2 (en) 2003-06-04
CN1468491A (en) 2004-01-14

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