DE10035707A1 - Digital acquisition and reproduction involves setting header information in isolated packets representing input data stream time position, adding null packets corresponding to time separation - Google Patents

Digital acquisition and reproduction involves setting header information in isolated packets representing input data stream time position, adding null packets corresponding to time separation

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Publication number
DE10035707A1
DE10035707A1 DE2000135707 DE10035707A DE10035707A1 DE 10035707 A1 DE10035707 A1 DE 10035707A1 DE 2000135707 DE2000135707 DE 2000135707 DE 10035707 A DE10035707 A DE 10035707A DE 10035707 A1 DE10035707 A1 DE 10035707A1
Authority
DE
Germany
Prior art keywords
data
data stream
packets
data packets
header information
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Withdrawn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
DE2000135707
Other languages
German (de)
Inventor
Christophe Genevois
Paolo Siccardo
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
Priority to DE2000135707 priority Critical patent/DE10035707A1/en
Publication of DE10035707A1 publication Critical patent/DE10035707A1/en
Withdrawn legal-status Critical Current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
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/4147—PVR [Personal Video Recorder]
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/907—Television signal recording using static stores, e.g. storage tubes or semiconductor memories
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

The method involves filtering input data, isolating packets with matching identification data, setting headers representing time positions in the input data, combining to form received data, storing, reading out for reproduction, whereby data packets are separated from headers, null packets are added to packets corresponding to the time separation of subsequent packets in the input data, and combing data/null packets to form an output data stream. The method involves filtering the input data stream and isolating packets with corresponding packet identification data, setting header information in the isolated packets representing their time position in the input data stream, combining them to form a reception data stream, storing this on a memory medium, reading it out for reproduction, whereby the data packets are separated from the header information in the read out data stream and null packets are added to each data packet corresponding to the time separation of the subsequent data packet in the input data stream, and combing the read out packets and the null packets to form an output data stream. Independent claims are also included for the following: an arrangement for implementing the method.

Description

Die Erfindung betrifft ein digitales Aufnahme- und Wiedergabeverfahren für multimediale Inhalte.The invention relates to a digital recording and playback method for multimedia content.

Um multimediale Inhalte wie Fernsehsendungen, Videofilme oder Musik­ titel nur berechtigten Empfängern verfügbar zu machen, werden sie verschlüsselt übertragen. Zur Entschlüsselung wird ein CAM-Modul benötigt, das in einer Set-Top-Box integriert oder in einem getrenn­ ten, steckbaren Modul verwirklicht sein kann.About multimedia content such as television programs, video films or music They will only make titles available to authorized recipients encrypted transmission. A CAM module is used for decryption that is integrated in a set-top box or in a separate one th pluggable module can be realized.

Mit den verfügbaren Systemen können die verschlüsselt übertragenen multimedialen Inhalte nur in Realzeit abgerufen werden. Um bestimmte Inhalte zu verschiedenen Zeiten verfügbar zu machen, werden sie zeitversetzt mehrfach übertragen. Eine Aufzeichnung der übertragenen multimedialen Inhalte wurde bisher aus Gründen des Kopierschutzes nicht in Betracht gezogen. Ohnehin wäre die digitale Aufzeichnung multimedialer Inhalte wegen der hohen Datenrate nur mit erheblichem Aufwand realisierbar. With the available systems, the encrypted ones can be transmitted multimedia content can only be accessed in real time. To certain They will make content available at different times transmitted several times later. A record of the broadcast multimedia content has been used for reasons of copy protection not considered. The digital recording would be anyway multimedia content due to the high data rate only with considerable Effort realizable.  

Durch die Erfindung wird ein digitales Aufnahme- und Wiedergabever­ fahren für multimediale Inhalte geschaffen, durch das der Kopierschutz erhalten bleibt und eine zeitunabhängige Verfügbarkeit erreicht wird.By the invention, a digital recording and playback ver drive for multimedia content created by the copy protection is retained and a time-independent availability is achieved.

Der Gegenstand der Erfindung ist in den beigefügten Patentansprüchen angegeben und wird nachfolgend anhand der beigefügten Zeichnungen näher erläutert.The object of the invention is in the appended claims is indicated and is below with reference to the accompanying drawings explained in more detail.

Fig. 1 zeigt ein bevorzugtes Anwendungsbeispiel der Erfindung. Ein Fernsehgerät 10 ist über eine Set-Top-Box 12 mit einer Satelliten- Antenne 14 oder einem Kabelanschluß verbunden. Die Set-Top-Box 12 wird mittels einer Fernbedienung 16 gesteuert. Die Set-Top-Box 12 hat ein Common-Interface, d. h. eine Schnittstelle in Form eines PCMCIA- Steckplatzes für eine PCMCIA-Karte, auch als PC-Karte bezeichnet. Diese PC-Karte 18 hat ihrerseits eine Schnittstelle zum Anschließen eines Speichermediums 20, insbesondere in Form einer Festplatte. Es kommen aber auch Halbleiter-Massenspeicher in Betracht, ebenso wie Massenspeicher, die in der PC-Karte 18 enthalten oder in diese auswechselbar eingesteckt sein können. Fig. 1 shows a preferred application example of the invention. A television set 10 is connected via a set-top box 12 to a satellite antenna 14 or a cable connection. The set-top box 12 is controlled by means of a remote control 16 . The set-top box 12 has a common interface, ie an interface in the form of a PCMCIA slot for a PCMCIA card, also referred to as a PC card. This PC card 18 in turn has an interface for connecting a storage medium 20 , in particular in the form of a hard disk. However, semiconductor mass storage devices are also possible, as are mass storage devices which are contained in the PC card 18 or can be inserted exchangeably therein.

Fig. 2 zeigt die wesentlichen Funktionsblöcke, die in der PC-Karte 18 verwirklicht sind. In Fig. 3 ist der Kern des erfindungsgemäßen Ver­ fahrens veranschaulicht, das mit den in der PC-Karte 18 enthaltenen Funktionsblöcken durchgeführt wird. Fig. 4 zeigt die Datenströme in der Set-Top-Box 12 sowie zwischen der auf der PC-Karte 18 verwirklich­ ten Vorrichtung und dem durch eine Festplatte gebildeten Massenspei­ cher 20. Ebenfalls ersichtlich ist in Fig. 4 ein CAM-Modul 22, das an einem zweiten PCMCIA-Steckplatz der Set-Top-Box 12 angeschlossen ist. Fig. 2 shows the main functional blocks that are realized in the PC card 18. In Fig. 3, the core of the method according to the invention is illustrated, which is carried out with the function blocks contained in the PC card 18 . Fig. 4 shows the data streams in the set-top box 12 and between the realized on the PC card 18 th device and the mass memory 20 formed by a hard disk. 4 is a CAM module 22, the second on a PCMCIA slot can also be seen in Fig. The set-top box 12 is connected.

Claims (10)

1. Digitales Aufnahme- und Wiedergabeverfahren für multimediale Inhalte, bei dem
ein eingangsseitiger Datenstrom aus Datenpaketen besteht, die in genau definierten Zeitfenstern in Zeit-Multiplex oder statistischer Verteilung aufeinanderfolgen, wobei die aufeinanderfolgenden Datenpakete mit vorangestellten Datenpaket-Identifikationsdaten versehen sind;
der eingangsseitige Datenstrom gefiltert wird und aus dem Datenstrom Datenpakete übereinstimmender Datenpaket-Identifikationsdaten isoliert werden;
den so isolierten Datenpaketen eine Datenpaket-Kopfinformation vorangestellt wird, die repräsentativ für die zeitliche Position der Datenpakete in dem eingangsseitigen Datenstrom ist;
die isolierten Datenpakete mit den Datenpaket-Kopfinformationen zu einem Aufnahme-Datenstrom zusammengefügt werden;
der Aufnahme-Datenstrom auf einem Speichermedium gespeichert wird;
zur Wiedergabe der Datenstrom von dem Speichermedium ausgelesen wird;
in dem ausgelesenen Datenstrom die Datenpakete von den Datenpaket- Kopfinformationen getrennt werden;
jedem Datenpaket eine Anzahl von Nulldaten-Datenpaketen angefügt wird, die dem zeitlichen Abstand des darauffolgenden Datenpakets in dem eingangsseitigen Datenstrom entspricht;
die ausgelesenen Datenpakete mit den angefügten Nulldaten- Datenpaketen zu einem ausgangsseitigen Datenstrom zusammengesetzt werden.1. Digital recording and playback process for multimedia content, in which
an input-side data stream consists of data packets which follow one another in precisely defined time windows in time multiplex or statistical distribution, the successive data packets being provided with preceding data packet identification data;
the input data stream is filtered and data packets of matching data packet identification data are isolated from the data stream;
the data packets isolated in this way are preceded by data packet header information which is representative of the temporal position of the data packets in the input-side data stream;
the isolated data packets are combined with the data packet header information to form a recording data stream;
the recording data stream is stored on a storage medium;
the data stream is read from the storage medium for playback;
in the data stream read out, the data packets are separated from the data packet header information;
a number of null data data packets is added to each data packet, which corresponds to the time interval of the subsequent data packet in the input-side data stream;
the data packets read out are combined with the zero data packets attached to form an output-side data stream. 2. Verfahren nach Anspruch 1, bei dem die Datenpakete verschlüsselt sind und auf dem Speichermedium verschlüsselt gespeichert werden.2. The method of claim 1, wherein the data packets are encrypted and are stored encrypted on the storage medium. 3. Verfahren nach Anspruch 2, bei dem der ausgangsseitige Datenstrom mit einem Schlüssel entschlüsselt wird, der von einem CAM (Condtional Access Module, d. h. Modul zur Überprüfung der Zugangsberechtigung) bereitgestellt wird.3. The method according to claim 2, wherein the output data stream is decrypted with a key that is used by a CAM (Conditional Access Module, i. H. Access authorization check module) provided. 4. Verfahren nach einem der vorstehenden Ansprüche, bei dem der eingangsseitige Datenstrom mit einer Datenrate empfangen wird, die gegenüber der Datenrate bei der Wiedergabe um ein vielfaches reduziert ist.4. The method according to any one of the preceding claims, wherein the input data stream is received at a data rate that compared to the data rate during playback many times reduced is. 5. Verfahren nach Anspruch 4, bei dem der Aufnahme und Wiedergabe gleichzeitig erfolgen.5. The method of claim 4, wherein the recording and playback done simultaneously. 6. Vorrichtung zur Durchführung des Verfahrens nach einem der vorstehenden Ansprüche, mit wenigstens einer PCMCIA-Schnittstelle zur Aufnahme eines Schnittstellen-Moduls, an dem das Speichermedium anschließbar ist.6. Device for performing the method according to one of the preceding claims, with at least one PCMCIA interface to accommodate an interface module on which the Storage medium is connectable. 7. Vorrichtung zur Durchführung des Verfahrens nach einem der vorstehenden Ansprüche, mit wenigstens einer PCMCIA-Schnittstelle zur Aufnahme eines einschiebbaren Chipkartenlesers und einem CAM-Modul (Condtional Access Module, d. h. Modul zur Überprüfung der Zugangsberechtigung) in Form einer in den Chipkartenleser einschiebbaren Chipkarte.7. Device for performing the method according to one of the preceding claims, with at least one PCMCIA interface for Inclusion of a retractable chip card reader and a CAM module (Conditional Access Module, i.e. module for checking the  Access authorization) in the form of a chip card reader insertable chip card. 8. Vorrichtung nach Anspruch 6 oder 7, mit einer PCMCIA-Karte, in die ein auswechselbares Speichermodul einschiebbar ist.8. The device according to claim 6 or 7, with a PCMCIA card in the an exchangeable memory module can be inserted. 9. Vorrichtung nach Anspruch 6 oder 7, mit einer PCMCIA-Karte und einem darin enthaltenen Speichermedium.9. The device according to claim 6 or 7, with a PCMCIA card and a storage medium contained therein. 10. Vorrichtung nach einem der Ansprüche 6 bis 9, in Form einer PCMCIA-Karte, die an einer Common-Interface-Schnittstelle einer Set- Top-Box anschließbar ist und eine Schnittstelle für das Speichermedium aufweist.10. Device according to one of claims 6 to 9, in the form of a PCMCIA card connected to a common interface interface of a set Top box can be connected and an interface for the storage medium having.
DE2000135707 2000-07-21 2000-07-21 Digital acquisition and reproduction involves setting header information in isolated packets representing input data stream time position, adding null packets corresponding to time separation Withdrawn DE10035707A1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6832319B1 (en) * 1998-04-24 2004-12-14 International Business Machines Corporation Content guard system for copy protection of recordable media
WO2005046242A1 (en) * 2003-11-06 2005-05-19 Koninklijke Philips Electronics N.V. A method and system for extracting/storing specific program from mpeg multiple program transport stream
DE102004022249A1 (en) * 2004-05-04 2005-09-29 Loewe Opta Gmbh Network adapter for e.g. digital TV signals receiving unit, has microprocessor in which driver software is run for activating and controlling respective network modules, where adapter is inserted into CI slot for decoding pay TV programs
US7380137B2 (en) 1999-07-20 2008-05-27 International Business Machines Corporation Content guard system for copy protection of recordable media
EP2222074A1 (en) * 2009-02-19 2010-08-25 Real Invent GmbH Method and device for processing CI-conforming transport data flows
EP3166322A4 (en) * 2014-07-03 2017-12-06 Sony Semiconductor Solutions Corporation Data processing apparatus, reception apparatus, data processing method, and program
CN115211039A (en) * 2020-02-27 2022-10-18 哲库科技有限公司 Bus traffic reduction mechanism and related method of operation

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EP0679028A2 (en) * 1994-04-22 1995-10-25 Thomson Consumer Electronics, Inc. Inverse transport processor with memory address circuitry
WO1998040889A2 (en) * 1997-03-12 1998-09-17 Koninklijke Philips Electronics N.V. Recording of a digital information signal on a record carrier
DE19734071A1 (en) * 1997-08-06 1999-02-11 Siegfried E Wilhelm Decoder device for decrypting encrypted television programs
DE19847071A1 (en) * 1998-10-06 2000-04-13 Hertz Inst Heinrich Interactive multimedia card module in personal computer card format, for processing digital MPEG data, uses PC interface and digital video broadcasting interface
DE19908488A1 (en) * 1999-02-26 2000-08-31 Thomson Brandt Gmbh Method and device for reproducing digital data streams
DE19921094A1 (en) * 1999-04-30 2000-11-02 Hertz Inst Heinrich Interactive multimedia card module

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EP0679028A2 (en) * 1994-04-22 1995-10-25 Thomson Consumer Electronics, Inc. Inverse transport processor with memory address circuitry
WO1998040889A2 (en) * 1997-03-12 1998-09-17 Koninklijke Philips Electronics N.V. Recording of a digital information signal on a record carrier
DE19734071A1 (en) * 1997-08-06 1999-02-11 Siegfried E Wilhelm Decoder device for decrypting encrypted television programs
DE19847071A1 (en) * 1998-10-06 2000-04-13 Hertz Inst Heinrich Interactive multimedia card module in personal computer card format, for processing digital MPEG data, uses PC interface and digital video broadcasting interface
DE19908488A1 (en) * 1999-02-26 2000-08-31 Thomson Brandt Gmbh Method and device for reproducing digital data streams
DE19921094A1 (en) * 1999-04-30 2000-11-02 Hertz Inst Heinrich Interactive multimedia card module

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6832319B1 (en) * 1998-04-24 2004-12-14 International Business Machines Corporation Content guard system for copy protection of recordable media
US7380137B2 (en) 1999-07-20 2008-05-27 International Business Machines Corporation Content guard system for copy protection of recordable media
WO2005046242A1 (en) * 2003-11-06 2005-05-19 Koninklijke Philips Electronics N.V. A method and system for extracting/storing specific program from mpeg multiple program transport stream
DE102004022249A1 (en) * 2004-05-04 2005-09-29 Loewe Opta Gmbh Network adapter for e.g. digital TV signals receiving unit, has microprocessor in which driver software is run for activating and controlling respective network modules, where adapter is inserted into CI slot for decoding pay TV programs
EP2222074A1 (en) * 2009-02-19 2010-08-25 Real Invent GmbH Method and device for processing CI-conforming transport data flows
EP3166322A4 (en) * 2014-07-03 2017-12-06 Sony Semiconductor Solutions Corporation Data processing apparatus, reception apparatus, data processing method, and program
CN115211039A (en) * 2020-02-27 2022-10-18 哲库科技有限公司 Bus traffic reduction mechanism and related method of operation
CN115211039B (en) * 2020-02-27 2023-09-01 哲库科技(上海)有限公司 Method for operating a communication device, communication device and non-transitory computer readable medium

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