KR100874449B1 - Simulcrypt embodiment system inserted pseudo module - Google Patents

Simulcrypt embodiment system inserted pseudo module Download PDF

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Publication number
KR100874449B1
KR100874449B1 KR1020070081897A KR20070081897A KR100874449B1 KR 100874449 B1 KR100874449 B1 KR 100874449B1 KR 1020070081897 A KR1020070081897 A KR 1020070081897A KR 20070081897 A KR20070081897 A KR 20070081897A KR 100874449 B1 KR100874449 B1 KR 100874449B1
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KR
South Korea
Prior art keywords
scs
eis
control message
ecm
cas
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KR1020070081897A
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Korean (ko)
Inventor
신현탁
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(주)캐스톤
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Priority to KR1020070081897A priority Critical patent/KR100874449B1/en
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Publication of KR100874449B1 publication Critical patent/KR100874449B1/en

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    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
    • 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
    • H04N21/4408—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 encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
    • 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]

Abstract

The present invention includes a virtual module in which a conventional EIS and a conventional SCS are blocked so that security data associated with other CAs cannot be inserted, and is combined with a blocked conventional EIS-CSS module of a CA. The virtual module is combined with a conventional SCS, and analyzes and extracts channel related information and other security related information in a data stream transmitted from the conventional SCS, and inserts data of a limited reception system to be added to the data stream. SCS for requesting ECM and receiving ECM in response to the AC and control word (CW) transmitted from the EIS to the conventional subscriber entitlement control message generator (ECMG) and the additional subscriber entitlement control message generator (ECMG). It includes, provides a simulation implementation system by inserting a virtual module.

Description

Simulcrypt implementation system by inserting virtual module

The present invention relates to the encryption and scrambling of audio / video and data in a digital broadcast transmission system. Specifically, the present invention relates to arbitrary reception without changing the platform of another Conditional Access System (CAS). The present invention relates to a simulation implementation system through the insertion of a virtual module that implements the same function as the Simulcrypt function to add a restriction system to perform a unique function of each reception restriction system.

The simulcrypt refers to a method in which the subscriber's receiver (STB) is separated into modules for descrambling and encryption processing in order to accommodate various CA operators.

The descrambling method uses a common scrambling algorithm (DVB-CSA), which is a common scrambling algorithm, and the encryption method is used differently for each conditional access system so that subscriber receivers are adapted and responded to each other. The subscriber receiver can use different limited reception systems by allowing viewing according to the encryption of CAS).

On the other hand, DVB (Digital Video Broadcasting) allows paid broadcasting service providers to select and operate a conditional access system (CAS) in a digital broadcasting system, enhance flexibility in operating a business model, and provide a limited reception system for any paid broadcasting service. In order to prevent the market from being monopolized by the operator, the DVB standard Simulcrypt Architecture was developed and standardized.

In the Simulcrypt architecture, each service is transmitted together with security data such as an Entitlement Management Message (EMM) and an Entitlement Control Message (ECM) for various proprietary systems. The ECM includes a control word for descrambling an authenticated service. Each service is composed of audio / video packets, and any decoder decodes the information necessary for the descrambling from the stream and does not refer to other packets in the stream.

In DVB Simulated-based Conditional Access System (CAS), digital audio / video and data processing systems parse the PMT and use the CA system identification ID obtained from the CA module to extract ECM PIDs and services. .

Each CA module supports only one CA system and therefore has only one CA system identification ID. The PID of the ECM and the PID of the A / V packet accompanying the control word CW are transmitted to the CA module, which descrambles a program having a normal purchase price.

In order to provide Pay TV Service, any program is scrambled, and the transport stream carries a program, an ECM and a PMT. The PMT has an entry for each CA system that protects this program. Each entry contains the CA_system_id, the PID of the scrambled stream, and the PID of the ECM containing the key to descramble this program.

However, the current conditional access system (CAS), a key technology for implementing pay-TV services such as satellite, cable, and terrestrial waves, is difficult to enter the industry by late-tier companies due to the specialized specifications of leading companies. For more stable business operation through broadcasting company's operational liquidity, business model expansion, and technological prowess, it is required to develop a simulcrypt implementation system that can simultaneously operate multiple Restricted Reception Systems (CAS).

Hereinafter, with reference to the drawings will be described the problems with the prior art and the prior art.

1 is a diagram illustrating the simulation system architecture and signal processing flow of the conventional DVB standard.

Referring to FIG. 1, the DVB standard simulation system transmits an AC 10 from an ACG 10 to an event information schedule (EIS) 20, and the EIS 20 stores and distributes schedule information. In more detail, the EIS 20 transmits a signal to the Mux Config 30 and transmits AC to the SCS 40. Meanwhile, the Mux Config 30 transmits a signal to the Mux 50 and the (P) SI Generator 60, and the Mux 50 transmits the EMMs signal and the Mux Config 30 from the EMMG 70. , (P) receives the signals from the SI generator 60 and SCS (SimulCrypt Synchronizer) 40 and transmits them to the scrambler 80. In more detail, the (P) SI generator 60 receives the (P) SI table and the SCS 40 receives each ECMs.

In more detail, when the EIS 20 receives an update from the Mux Config 30 through the SCS 40, the EIS 20 is updated by the (P) SI generator 60 to provide PSI (Program Specific Information) to the scrambling control.

The SCS 40 obtains an Entitlement Control Message (ECM) including the subscriber's authority information and the control word (CW) from the subscriber entitlement control message generator (ECMG) 70 and from the Control Word Generator (CWG) 100. It requires a Control Word (CW) used for scrambling. It also receives from the EIS 20 an Access Criteria (AC) containing information on how the ECM should be configured. The SCS 40 receives the AC from the stream server, generates a control word CW, and transmits the AC and the control word CW to the subscriber entitlement control message generator (ECMG) 90. The signed ECM and control word CW are then received from the subscriber entitlement control message generator (ECMG) 90.

The Entitlement Control Message Generator (ECMG) 90 generates an accurate ECM according to the AC and the control word CW received from the SCS 40 and transmits the correct ECM to the SCS 40.

The SCS 40 finally transmits a control word CW to the scrambler 80.

FIG. 2 is a diagram illustrating a simulated implementation system in which any conventional conditional access system configures its own specialized EIS to limit the application of additional conditional access system according to the DVB standard.

Hereinafter, a description of the same parts as the components shown in FIG. 1 will be omitted.

2, a scrambling control group (SCG) 110 transmits PID, ECM PID, AC, etc. of a resource (A / V, etc.) to the EIS 20, and the EIS 20 sends an SCS 40. The SCS 40 transmits the AC received from the EIS 20 and the control word CW received from the CWG 100 to the subscriber entitlement control message generator (ECMG) 90. Requires ECM The subscriber identity control message generator (ECMG) 90 provides an ECM to the SCS 40 in accordance with the AC, control word CW.

As shown in FIG. 2, in the conventional simulation implementation scheme, the SCS 40 receives information transmitted from a single EIS 20 so that the CA system generates ECM information so that one CA system can generate one restriction. It is to enable the receiving system (CAS). That is, the conventional CA system employs its own customized EIS 20, so that the CA system, which wants to add information about AC and CA control required for the simulation, is configured to use the SCS (SAS). There is a problem in that it cannot be used to implement additional simulations.

In more detail, a limited reception system (CAS) is adopted as a main technology for implementing pay broadcasting services such as satellite / cable / terrestrial waves. Although the implementation of the DVB specification, SimuLect, can be implemented based on the DVB specification, in the initial market, the DVB standard does not allow other CAs to enter the market in order to form a monopolistic market. In order to prevent the implementation of the simulation of the standard, their specialized EIS has been applied to block the flexibility of the broadcaster's choice of CA and other CAs' market entry.

However, when designing a solution based on the DVB specification of any CA system, it is possible to implement a SIM and a third party CA system without any additional modules. As explained above, the problem is that preemptive CA systems have often adopted solutions that make it impossible to implement SimulatedScript that meets these DVB specifications. Therefore, there is a need for developing a method capable of implementing the same functions as SimuLect even if the DVB standard is not followed.

The present invention devised to solve the above problems, if it is impossible to implement the simulation of the DVB standard, by inserting a pseudo module (Pseudo Module) to enable the addition and transmission of information between the EIS and SCS to the same function as the simuscript An object of the present invention is to provide a simulation implementation system by inserting a virtual module that can be implemented.

In addition, broadcasters not only seek to gain operating profits and technical supplements by weakening the monopoly of conventional limited reception systems (CAS), but also operate new limited reception systems (CAS). It is an object of the present invention to provide a simulation implementation system by inserting a virtual module that enables the expansion of operating profit through new market entry.

In order to achieve the above object, the present invention provides a system in which a conventional EIS and a conventional SCS are blocked so that security data associated with other CAs cannot be inserted. And a virtual module for combining, wherein the virtual module is combined with a conventional SCS and analyzes and extracts channel related information and other security related information in a data stream transmitted from the conventional SCS, and then adds to the data stream. The EIS inserting data, the AC and the control word (CW) received from the EIS are transmitted to the conventional subscriber entitlement control message generator (ECMG) and the additional subscriber entitlement control message generator (ECMG) to request an ECM and in response. It provides a simulation implementation system by inserting a virtual module, including the SCS receiving the ECM.

Preferably, the conventional or additional subscriber identity control message generator (ECMG) receives mixed information from the SCS, obtains necessary information based on the mixed information, and generates ECMs corresponding to CA systems, respectively. The SCS transmits all the information to the Mux and transmits a plurality of CAS data to a receiver at the subscriber end through one stream.

In the present invention, when it is impossible to implement the simulation of DVB standard, it is possible to add and transmit information between the EIS and the SCS by inserting a pseudo module, thereby inserting a virtual module that can implement the same function as the simulation. Provides a simulator implementation system.

In addition, broadcasters not only seek to gain operating profits and technical supplements by weakening the monopoly of conventional limited reception systems (CAS), but also operate new limited reception systems (CAS). It provides a simulation implementation system through the insertion of a virtual module that enables the expansion of operating profit through new market entry.

In order to fully understand the present invention, the advantages of the operability of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements. Hereinafter, the description of the same parts as in the prior art will be omitted as much as possible when the gist of the present invention may be blurred. However, of course, this should also be considered when necessary for the implementation of the present invention.

3 is a diagram showing a simulation implementation system through the insertion of a virtual module of the present invention.

Referring to FIG. 3, the simulation implementation system through the insertion of a virtual module of the present invention further includes a pseudo module 200 coupled with a blocked EIS-SCS module of a conventional limited reception system (CAS). . In more detail, the conventional SCS 40 and the EIS 210 of the virtual module 200 are combined, and adds data of a limited reception system (CAS) to be added to the SCS 220 of the virtual module 200. The SCS 220 transmits the AC and the control word CW received from the EIS 210 to the subscriber entitlement control message generator (ECMG) 90 and requests an ECM. At this time, the AC and control word CW may also be transmitted to the subscriber identity control message generator (ECMG) 190 to be added, and the ECM may be received in response. A conventional subscriber identity control message generator (ECMG) 90 and an additional subscriber identity control message generator (ECMG) 190 provide an ECM to the SCS 220 in accordance with the AC, control word CW.

In the case of the normal simulation, the EIS 20 and the SCS 40 are separated, but the EIS 20 and the SCS 40 are blocked so that the security data associated with other restricted reception systems can be implemented to implement the simulation function of the DVB standard. If the system is configured to be impossible to insert, it analyzes and extracts channel related information (AC) and other security related information from a conventional CA protected stream, and then inserts data (ECM_PID, SuperCAS_ID, etc.) of the restricted receiving system to be added. A pseudo module 200 including the EIS 210 and the SCS 220 may be inserted to implement the same function as the simulated script.

That is, by inserting the virtual module 200 having the function of the EIS 210 and the SCS 220 coupled with the EIS 20 and the SCS 40 module of the conventional limited reception system (CAS) company, The AC and CA control information required for the simulation transmitted from the blocked EIS 20 and the SCS 40 of the CAS) may be extracted, and CA information to be added may be inserted into the stream.

The conventional CA system and the CA to be added are information required by each subscriber identity control message generator (ECMG) 90, 190 through the mixed information received from the SCS 220. Obtains an ECM corresponding to each CA system, and the SCS 220 transmits all the information to the Mux 50 to transmit a plurality of CAS data to a receiver of a subscriber end through one stream. send. Each receiver at the subscriber end only extracts corresponding CA information to decrypt and view the program encryption. In this way, you can implement the same functionality as SimuLect.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. .

Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a diagram illustrating the simulation system architecture and signal processing flow of the conventional DVB standard.

FIG. 2 illustrates a simulated implementation system in which any conventional conditional access system has configured its own specialized EIS to limit the application of additional conditional access systems in accordance with the DVB standard.

3 is a view showing a simulation implementation system through the insertion of a virtual module of the present invention.

Claims (2)

In a system in which a conventional EIS (Event Information Schedule) and a conventional SCS (SimulCrypt Synchronizer) are blocked to prevent the insertion of security data associated with other CAs, Blocked conventional Event Information Schedule (EIS) of the Constrained Receive System (CAS)-includes a virtual module coupled with a conventional SimCrypt Synchronizer (SCS) module The virtual module is combined with a conventional SCS (SimulCrypt Synchronizer), analyzes and extracts channel related information and other security related information in a data stream transmitted from the conventional SCS (SimulCrypt Synchronizer), and then adds to the data stream. Event Information Schedule (EIS) for inserting data, An access control message (AC) and a control word (CW) received from the event information schedule (EIS) are transmitted to a conventional subscriber entitlement control message generator (ECMG) and an additional subscriber entitlement control message generator (ECMG) to receive an Entitlement Control Message (ECM). And a SimulCrypt Synchronizer (SCS) that receives an Entitlement Control Message (ECM) that responds to each Conditional Access (CA) system in response thereto. The method of claim 1, The conventional or additional subscriber entitlement control message generator (ECMG) receives the Access Criteria (AC) and the Control Word (CW) from the SimulCrypt Synchronizer (SCS), and receives the Access Criteria (AC) and the Control Word (CW). On the basis of this, it acquires the information necessary for each and generates an Entitlement Control Message (ECM) that is compatible with the CA (Conditional Access) system. The SimulCrypt Synchronizer (SCS) transmits the Entitlement Control Message (ECM), which is compatible with each Conditional Access (CA) system, to a Mux, and transmits a plurality of CAS data to a receiver at a subscriber end through one stream. Simulation implementation system by inserting the transmitting virtual module.
KR1020070081897A 2007-08-14 2007-08-14 Simulcrypt embodiment system inserted pseudo module KR100874449B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020116886A1 (en) * 2018-12-05 2020-06-11 Samsung Electronics Co., Ltd. Electronic apparatus, server and method of controlling the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020188567A1 (en) 1999-11-09 2002-12-12 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020188567A1 (en) 1999-11-09 2002-12-12 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020116886A1 (en) * 2018-12-05 2020-06-11 Samsung Electronics Co., Ltd. Electronic apparatus, server and method of controlling the same
US11272234B2 (en) 2018-12-05 2022-03-08 Samsung Electronics Co., Ltd. Electronic apparatus, server and method of controlling the same

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