WO2016101687A1 - 数字电视终端条件接收方法、终端及系统 - Google Patents

数字电视终端条件接收方法、终端及系统 Download PDF

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Publication number
WO2016101687A1
WO2016101687A1 PCT/CN2015/092306 CN2015092306W WO2016101687A1 WO 2016101687 A1 WO2016101687 A1 WO 2016101687A1 CN 2015092306 W CN2015092306 W CN 2015092306W WO 2016101687 A1 WO2016101687 A1 WO 2016101687A1
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Prior art keywords
program
service interface
data
terminal
cloud server
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English (en)
French (fr)
Inventor
罗克光
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New Technology Co Ltd
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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
    • H04N21/434—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

Definitions

  • the present invention relates to the field of digital television technologies, and in particular, to a digital television terminal condition receiving method, terminal and system.
  • CAS Consumer Access System, digital TV conditional access system
  • broadcast TV network operators can control the receiving equipment of digital TV terminals, so that authorized users can watch certain programs without being authorized. Users can't watch it.
  • CAS provides a basis for operators' fees.
  • the general principle of CAS is: the scrambling and encryption of the transport stream is implemented in the front-end CAS; and an inverse process is performed in the terminal CA, that is, decryption and descrambling.
  • scrambling refers to the use of CW (Control Word, Control Word) disrupts the process of transport stream bit order and then bitwise encryption.
  • Encryption refers to the protection of CW.
  • SK Service
  • Key business key
  • the ciphertext generated by CW encryption is called ECM (Entitlement Control).
  • EMM Entitlement Manage
  • SK data the ciphertext generated by SK encryption
  • EMM also contains the smart card number, chip ID number, user authorization information.
  • the terminal CA decryption and descrambling process is shown in Figure 2, which is roughly as follows:
  • the EMM data is sent to the terminal decryption descrambling module, and the terminal decryption descrambling module determines whether the user has authorization through the built-in decryption program on the smart card or the chip, and the user is not authorized to authorize the program without authorization; and the authorization passes through the PSI.
  • PMT Program Mapping Table, program mapping table
  • the EMM and ECM data are sent to the terminal decryption descrambling module, the terminal decryption descrambling module calculates the SK through the built-in decryption program, and then obtains the CW through the SK; the obtained CW is sent to the decoder to complete the solution to the transport stream. Disturb.
  • the existing CAS must include a decryption descrambling module when the terminal CA decrypts the descrambling.
  • the current common practice is as follows: First, the smart card driver is integrated on the terminal receiving main chip, the decryption program is built in the smart card, and the data is exchanged with the main chip through the smart card driver; the second is directly integrated on the terminal receiving main chip. The chip module of the decryption program.
  • the conditional reception of the existing digital television terminal needs to rely on various hardware devices based on the decryption descrambling module, such as a smart card and a built-in descrambling chip, thereby increasing the production cost of the product and reducing the market competitiveness of the product.
  • the decryption descrambling module such as a smart card and a built-in descrambling chip
  • the main object of the present invention is to provide a digital television terminal condition receiving method, terminal and system, which aim to reduce the production cost of the product and improve the market competitiveness of the product.
  • the present invention provides a digital television terminal condition receiving method, including:
  • the program specific information including a conditional access table and a program map
  • the control word is sent to a decoder to descramble the transport stream.
  • the step of calling the service interface of the decryption descrambling program provided by the cloud server according to the conditional access table and the program mapping table in the program specific information, and acquiring the data fed back by the service interface comprises:
  • the authorization control information is obtained through the program mapping table in the program specific information;
  • the step of acquiring the control word of the transport stream from the fed back data comprises:
  • the method further includes:
  • the terminal device information includes: a MAC address, a serial number, and a device type of the terminal device.
  • the embodiment of the invention further provides a digital television terminal, comprising:
  • a data stream obtaining module configured to acquire a transport stream and program specific information, where the program specific information includes a condition receiving table and a program mapping table;
  • Calling an obtaining module configured to invoke a service interface of the decryption descrambling program provided by the cloud server according to the conditional receiving table and the program mapping table in the program specific information, and acquire data fed back by the service interface;
  • control word obtaining module configured to acquire, from the feedback data, a control word of the transport stream
  • a decoding module configured to send the control word to a decoder to descramble the transport stream.
  • the call obtaining module is further configured to acquire authorization management information by using a conditional access table in the program specific information; and encapsulating the authorization management information and the terminal device information into a network packet, and deploying the cloud server by using a network protocol.
  • control word obtaining module is further configured to parse the second data to obtain a control word of the transport stream.
  • the call obtaining module is further configured to prompt the user that the current program is unauthorized when the terminal user is not authorized.
  • the embodiment of the invention further provides a digital television conditional receiving system, comprising: a cloud server and a digital television terminal connected to the cloud server network; wherein:
  • the cloud server provides a service interface for decrypting and descrambling a program for the digital television terminal, and is configured to perform decryption and descrambling processing on the transport stream of the digital television terminal;
  • the digital television terminal is a terminal as described above.
  • a digital television terminal condition receiving method, terminal and system obtains a transport stream and a PSI; and calls a service interface of a decryption descrambling program provided by a cloud server according to a conditional receiving table and a program mapping table in the PSI Obtaining data fed back by the service interface; obtaining a control word of the transport stream from the fed back data; sending the control word to the decoder to descramble the transport stream, thereby making the conditional reception of the digital television terminal no longer dependent
  • Various hardware devices based on decryption descrambling modules such as smart cards and built-in descrambling chips, reduce product production costs, reduce integration work, speed up product development cycles, and enhance product competitiveness; in addition, cloud-based
  • the software structure has better scalability and facilitates the development of rich and colorful value-added services.
  • 1 is a schematic diagram of an encryption and scrambling process of a conventional digital television terminal CA
  • FIG. 2 is a schematic diagram of a decryption and descrambling process of a conventional digital television terminal CA;
  • FIG. 3 is a schematic flow chart of a preferred embodiment of a method for receiving a condition of a digital television terminal according to the present invention
  • FIG. 4 is a schematic diagram of a decryption and descrambling process according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of acquiring a service interface of a decryption descrambling program provided by a cloud server according to a conditional reception table and a program mapping table in a PSI according to an embodiment of the present invention, and acquiring data fed back by the service interface;
  • FIG. 6 is a schematic diagram of functional modules of a preferred embodiment of the digital television terminal of the present invention.
  • the solution of the embodiment of the present invention is mainly: the decryption and descrambling operation of the transport stream received by the digital television terminal condition is completed by the cloud server, so that the conditional reception of the digital television terminal is no longer dependent on various hardware devices based on the decryption descrambling module.
  • various hardware devices based on the decryption descrambling module.
  • Such as smart cards, built-in descrambling chips, etc. to reduce product production costs, reduce integration work, accelerate product development cycle, and enhance product competitiveness.
  • a preferred embodiment of the present invention provides a digital television terminal condition receiving method, including:
  • Step S101 acquiring a transport stream and a PSI, where the PSI includes a conditional access table and a program mapping table;
  • the existing CAS must include a decryption descrambling module when the terminal CA decrypts descrambling
  • the conditional reception of the existing digital television terminal needs to rely on various hardware devices based on the decryption descrambling module, such as a smart card and a built-in descrambling chip. Etc., thereby increasing the production cost of the product and reducing the market competitiveness of the product.
  • This embodiment considers that the receiving devices of various digital television terminals are gradually becoming intelligent. Whether it is an intelligent all-in-one machine, a smart set-top box, or various handheld television terminals, connecting to the Internet through a network has almost become a standard configuration of products. .
  • the solution of the embodiment of the present invention completes the decryption and descrambling operation of the conditional reception of the digital television terminal through the cloud server, so that the conditional reception of the digital television terminal can no longer depend on various hardware devices based on the decryption descrambling module, thereby reducing the product. Production costs and enhance product competitiveness.
  • the transport stream and PSI are acquired by the digital television terminal.
  • Information, program specific information), the PSI includes a conditional access table and a program map.
  • the digital television terminal may be a smart integrated machine, a smart set top box, or a variety of handheld television terminals.
  • Step S102 according to the conditional access table and the program mapping table in the PSI, calling a service interface of the decryption descrambling program provided by the cloud server, and acquiring data fed back by the service interface;
  • the decryption and descrambling program of the digital television terminal CA is deployed in the network cloud server.
  • the digital television terminal is connected to the cloud server network, and the cloud server provides a service interface with a decryption and descrambling program to the digital television terminal.
  • the digital television terminal calls the service interface of the decryption descrambling program provided by the cloud server according to the conditional access table and the program mapping table in the PSI, and obtains the data fed back by the cloud server after decrypting and descrambling the transport stream.
  • the digital television terminal acquires EMM data through a conditional access table in the PSI; and then, the EMM data and terminal device information (such as MAC (MediaAccess) Control, media access control (address, serial number, device type, etc.) is encapsulated into a network packet, which is sent to the cloud server through a protocol (such as HTTP network protocol), and the cloud server performs corresponding authorization judgment on the terminal user according to the received network packet. And return the processing result.
  • EMM data and terminal device information such as MAC (MediaAccess) Control, media access control (address, serial number, device type, etc.
  • the digital television terminal invokes the service interface of the decryption and descrambling program deployed by the cloud server through a protocol (such as a network protocol such as HTTP) to obtain the first data fed back by the service interface of the cloud server, where the first data includes the foregoing processing result fed back by the cloud server.
  • a protocol such as a network protocol such as HTTP
  • the digital television terminal parses the first data to determine whether the terminal user has authorization; if the terminal user does not have authorization, the user is prompted to not authorize the current program.
  • the ECM data is acquired through the program mapping table in the PSI.
  • the EMM data and the ECM data are encapsulated into a network packet, and sent to the cloud server, where the cloud server performs decryption and descrambling processing and corresponding calculation according to the received network packet, and returns the processing result.
  • the digital television terminal invokes a service interface of the decryption and descrambling program deployed in the cloud server through a protocol (such as a network protocol such as HTTP), and acquires second data returned by the service interface, where the second data includes the second processing that is fed back by the cloud server. result.
  • a protocol such as a network protocol such as HTTP
  • Step S103 acquiring a control word of the transport stream from the feedback data
  • the digital television terminal parses the second data fed back by the service interface of the cloud server, and acquires the control word CW of the transport stream.
  • Step S104 Send the control word to the decoder to descramble the transport stream.
  • the digital television terminal sends the parsed control word CW to the decoder to complete the descrambling of the transport stream.
  • the decryption and descrambling process of the solution of this embodiment may be as shown in FIG. 4.
  • the transport stream and the PSI are obtained by using the foregoing solution, and the service interface of the decryption descrambling program provided by the cloud server is invoked according to the conditional receiving table and the program mapping table in the PSI, and the data fed back by the service interface is obtained;
  • the feedback data is obtained from the control word of the transport stream; the control word is sent to the decoder for decoding, thereby enabling the conditional reception of the digital television terminal to no longer depend on various hardware devices based on the decryption descrambling module, such as a smart card, built-in De-scramble the chip, etc., thereby reducing the production cost of the product, reducing the integration work, accelerating the product development cycle, and enhancing the product competitiveness; in addition, the cloud-based software structure has better scalability, and is a rich and colorful value-added service. Easy to carry out.
  • step S102 calling a service interface of the decryption descrambling program provided by the cloud server according to the conditional access table and the program mapping table in the PSI, and acquiring data fed back by the service interface, including :
  • Step S1021 Acquire EMM data by using a conditional access table in the PSI.
  • Step S1022 the EMM data and the terminal device information are encapsulated into a network packet, and sent to the cloud server.
  • Step S1023 the service interface of the decryption descrambling program provided by the cloud server is invoked, and the first data fed back by the cloud server is obtained;
  • Step S1024 parsing the first data, determining whether the terminal user has authorization; if authorized, proceeding to step S1025; otherwise, proceeding to step S1028;
  • Step S1025 Acquire ECM data by using a program mapping table in the PSI.
  • Step S1026 the EMM data and the ECM data are encapsulated into a network packet
  • Step S1027 Call a service interface of the decryption descrambling program deployed in the cloud server through a network protocol, and acquire second data returned by the service interface.
  • Step S1028, prompting the user that the current program is not authorized.
  • conditional reception of the digital television terminal is no longer dependent on various hardware devices based on the decryption descrambling module, such as a smart card or a built-in descrambling chip, thereby reducing the production cost of the product and reducing the integration work.
  • the decryption descrambling module such as a smart card or a built-in descrambling chip
  • a preferred embodiment of the present invention provides a digital television terminal, including: a data stream acquisition module 201, a call acquisition module 202, a control word acquisition module 203, and a decoding module 204, where:
  • a data stream obtaining module 201 configured to acquire a transport stream and a PSI, where the PSI includes a condition receiving table and a program mapping table;
  • the call obtaining module 202 is configured to invoke a service interface of the decryption descrambling program provided by the cloud server according to the conditional access table and the program mapping table in the PSI, and acquire data fed back by the service interface;
  • a control word obtaining module 203 configured to acquire a control word of the transport stream from the feedback data
  • the decoding module 204 is configured to send the control word to a decoder to descramble the transport stream.
  • the existing CAS must include a decryption descrambling module when the terminal CA decrypts descrambling
  • the conditional reception of the existing digital television terminal needs to rely on various hardware devices based on the decryption descrambling module, such as a smart card and a built-in descrambling chip. Etc., thereby increasing the production cost of the product and reducing the market competitiveness of the product.
  • This embodiment considers that the receiving devices of various digital television terminals are gradually becoming intelligent. Whether it is an intelligent all-in-one machine, a smart set-top box, or various handheld television terminals, connecting to the Internet through a network has almost become a standard configuration of products. .
  • the solution of the embodiment of the present invention completes the decryption and descrambling operation of the conditional reception of the digital television terminal through the cloud server, so that the conditional reception of the digital television terminal can no longer depend on various hardware devices based on the decryption descrambling module, thereby reducing the product. Production costs and enhance product competitiveness.
  • the transport stream and PSI are acquired by the digital television terminal.
  • Information, program specific information), the PSI includes a conditional access table and a program map.
  • the digital television terminal may be a smart integrated machine, a smart set top box, or a variety of handheld television terminals.
  • the decryption and descrambling program of the digital television terminal CA is deployed in the network cloud server.
  • the digital television terminal is connected to the cloud server network, and the cloud server provides a service interface with a decryption and descrambling program to the digital television terminal.
  • the digital television terminal calls the service interface of the decryption descrambling program provided by the cloud server according to the conditional access table and the program mapping table in the PSI, and obtains the data fed back by the cloud server after decrypting and descrambling the transport stream.
  • the digital television terminal acquires EMM data through a conditional access table in the PSI; and then encapsulates the EMM data and terminal device information (such as a MAC address, a serial number, a device type, etc.) into a network packet, through a protocol (
  • the network protocol, such as HTTP, is sent to the cloud server, and the cloud server performs corresponding authorization judgment on the terminal user according to the received network packet, and returns the processing result.
  • the digital television terminal invokes the service interface of the decryption descrambling program deployed by the cloud server through a protocol (such as a network protocol such as HTTP), and obtains the first data fed back by the service interface of the cloud server, where the first data includes the foregoing processing result fed back by the cloud server.
  • a protocol such as a network protocol such as HTTP
  • the digital television terminal parses the first data to determine whether the terminal user has authorization; if the terminal user does not have authorization, the user is prompted to not authorize the current program.
  • the ECM data is acquired through the program mapping table in the PSI.
  • the EMM data and the ECM data are encapsulated into a network packet, and sent to the cloud server, where the cloud server performs decryption and descrambling processing according to the received network packet, and returns the processing result.
  • the digital television terminal acquires the service data of the decryption and descrambling program provided by the cloud server through a protocol (such as a network protocol such as HTTP), and obtains the second data fed back by the cloud server, where the second data includes the second processing result fed back by the cloud server.
  • a protocol such as a network protocol such as HTTP
  • the digital television terminal parses the second data fed back by the cloud server, and acquires the control word CW of the transport stream.
  • the digital television terminal sends the parsed control word CW to the decoder to complete the descrambling of the transport stream.
  • the decryption and descrambling process of the solution of this embodiment may be as shown in FIG. 4.
  • the transport stream and the PSI are obtained by using the foregoing solution, and the service interface of the decryption descrambling program provided by the cloud server is invoked according to the conditional receiving table and the program mapping table in the PSI, and the data fed back by the service interface is obtained;
  • the feedback data is obtained from the control word of the transport stream; the control word is sent to the decoder for decoding, thereby enabling the conditional reception of the digital television terminal to no longer depend on various hardware devices based on the decryption descrambling module, such as a smart card, built-in De-scramble the chip, etc., thereby reducing the production cost of the product, reducing the integration work, accelerating the product development cycle, and enhancing the product competitiveness; in addition, the cloud-based software structure has better scalability, and is a rich and colorful value-added service. Easy to carry out.
  • the call obtaining module 202 is further configured to: acquire EMM data by using a conditional access table in the PSI; encapsulate the EMM data and the terminal device information into a network packet, and send the information to the cloud server; and invoke the cloud server to provide Decrypting the service interface of the descrambling program, acquiring the first data fed back by the cloud server; parsing the first data to determine whether the terminal user has authorization; and when the terminal user is not authorized, prompting the user that the current program is not authorized.
  • the ECM data is obtained through the program mapping table in the PSI; the EMM data and the ECM data are encapsulated into a network packet, and sent to the cloud server; and the service interface of the decryption descrambling program provided by the cloud server is invoked to obtain the cloud server.
  • the second data of the feedback is obtained through the program mapping table in the PSI; the EMM data and the ECM data are encapsulated into a network packet, and sent to the cloud server; and the service interface of the decryption descrambling program provided by the cloud server is invoked to obtain the cloud server.
  • the control word obtaining module 203 is further configured to parse the second data to obtain a control word of the transport stream.
  • conditional reception of the digital television terminal is no longer dependent on various hardware devices based on the decryption descrambling module, such as a smart card or a built-in descrambling chip, thereby reducing the production cost of the product and reducing the integration work.
  • the decryption descrambling module such as a smart card or a built-in descrambling chip
  • a digital television terminal conditional access system includes: a cloud server and a digital television terminal connected to the cloud server network; wherein:
  • the cloud server provides a service interface for decrypting and descrambling a program for the digital television terminal, and is used for performing decryption and descrambling processing calculation on the transport stream of the digital television terminal;
  • the digital television terminal is the terminal described in the above embodiment.
  • the digital television terminal condition receiving method, the terminal and the system of the embodiment of the present invention acquire the transport stream and the PSI; call the service interface of the decryption descrambling program provided by the cloud server according to the conditional receiving table and the program mapping table in the PSI, and acquire the Deriving the data fed back by the service interface; obtaining the control word of the transport stream from the feedback data; sending the control word to the decoder for decoding, thereby making the conditional reception of the digital television terminal no longer dependent on various decryption descrambling modules Hardware devices, such as smart cards, built-in descrambling chips, etc., thereby reducing production costs, reducing integration work, accelerating product development cycles, and enhancing product competitiveness; in addition, cloud-based software architectures have better expansion Sex, to facilitate the development of a variety of value-added services.

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Abstract

本发明涉及一种数字电视终端条件接收方法、终端及系统，其方法包括：获取传输流以及PSI，所述PSI包括条件接收表和节目映射表；根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取服务接口反馈的数据；从反馈的数据中获取传输流的控制字；将控制字送入解码器对传输流进行解扰。本发明使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。

Description

数字电视终端条件接收方法、终端及系统
技术领域
本发明涉及数字电视技术领域，尤其涉及一种数字电视终端条件接收方法、终端及系统。
背景技术
CAS（Conditional Access System，数字电视条件接收系统）是广播电视网络的核心技术，通过CAS，广播电视网络运营商可以实现对数字电视终端接收设备的管控，使得被授权的用户可以观看特定的节目，而未被授权的用户则不能观看。此外，CAS还为运营商的收费提供了依据。
CAS的大致原理是：在前端CAS实现对传输流的加扰、加密；在终端CA再做一个逆过程，即解密、解扰。所谓加扰，是指使用CW（Control Word，控制字）扰乱传输流比特顺序再按位加密的过程。而加密，是指对CW的保护，经过CW的加密得到SK（Service Key，业务密钥）。对CW加密产生的密文称为ECM（Entitlement Control Message，授权控制信息），对SK加密产生的密文称为EMM（Entitlement Manage Message，授权管理信息），除了SK数据，EMM中还包含了智能卡号、芯片ID号、用户授权信息等。ECM和EMM均通过复用器和加扰的传输流一起传输。加扰、加密过程如图1所示。
终端CA解密、解扰过程如图2所示，大致如下：
1）通过PSI（Program Specific Information，节目特定信息）中的CAT（Conditional Access Table，条件接收表）获取到EMM数据；
2）将EMM数据送入终端解密解扰模块，终端解密解扰模块经过智能卡或芯片上的内置解密程序判定该用户是否拥有授权，无授权则提示用户该节目未授权；有授权则通过PSI中的PMT（Program Mapping Table，节目映射表）获取到ECM数据；
3）将EMM和ECM数据送入终端解密解扰模块，终端解密解扰模块经内置解密程序计算出SK，再通过SK得到CW；将获取到的CW送入解码器，完成对传输流的解扰。
由上述过程可知，现有的CAS在终端CA解密解扰时必须包含解密解扰模块。具体实现时，目前比较通用的做法：一是在终端接收主芯片上集成智能卡驱动，解密程序内置在智能卡上，通过智能卡驱动与主芯片进行数据交互；二是在终端接收主芯片上直接集成内置解密程序的芯片模块。
因此，现有的数字电视终端的条件接收需要依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而增加了产品的生产成本，降低了产品的市场竞争力。
发明内容
本发明的主要目的在于提供一种数字电视终端条件接收方法、终端及系统，旨在降低产品的生产成本，提高产品的市场竞争力。
为了达到上述目的，本发明提出一种数字电视终端条件接收方法，包括：
获取传输流以及节目特定信息，所述节目特定信息包括条件接收表和节目映射表；
根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
从所述反馈的数据中获取所述传输流的控制字；
将所述控制字送入解码器对所述传输流进行解扰。
优选地，所述根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据的步骤包括：
通过节目特定信息中的条件接收表获取授权管理信息；
将所述授权管理信息和终端设备信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第一数据；
解析所述第一数据，判断终端用户是否拥有授权；
若有授权，则通过节目特定信息中的节目映射表获取授权控制信息；
将所述授权管理信息和授权控制信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第二数据。
优选地，所述从反馈的数据中获取所述传输流的控制字的步骤包括：
解析所述第二数据，获取所述传输流的控制字。
优选地，所述解析第一数据，判断终端用户是否拥有授权的步骤之后还包括：
若终端用户无授权，则提示用户当前节目未授权。
优选地，所述终端设备信息包括：终端设备的MAC地址、序列号以及设备类型。
本发明实施例还提出一种数字电视终端，包括：
数据流获取模块，用于获取传输流以及节目特定信息，所述节目特定信息包括条件接收表和节目映射表；
调用获取模块，用于根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
控制字获取模块，用于从所述反馈的数据中获取所述传输流的控制字；
解码模块，用于将所述控制字送入解码器对所述传输流进行解扰。
优选地，所述调用获取模块，还用于通过节目特定信息中的条件接收表获取授权管理信息；将所述授权管理信息和终端设备信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第一数据；解析所述第一数据，判断终端用户是否拥有授权；若有授权，则通过节目特定信息中的节目映射表获取授权控制信息；将所述授权管理信息和授权控制信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第二数据。
优选地，所述控制字获取模块，还用于解析所述第二数据，获取所述传输流的控制字。
优选地，所述调用获取模块，还用于在终端用户无授权时，提示用户当前节目未授权。
本发明实施例还提出一种数字电视条件接收系统，包括：云端服务器和与所述云端服务器网络连接的数字电视终端；其中：
所述云端服务器为数字电视终端提供有解密解扰程序的服务接口，用于为数字电视终端的传输流进行解密解扰处理；
所述数字电视终端为如上所述的终端。
本发明实施例提出的一种数字电视终端条件接收方法、终端及系统，通过获取传输流以及PSI；根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；从反馈的数据中获取传输流的控制字；将控制字送入解码器对传输流进行解扰，由此，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。
附图说明
图1是现有的数字电视终端CA的加密、加扰过程示意图；
图2是现有的数字电视终端CA的解密、解扰过程示意图；
图3是本发明数字电视终端条件接收方法较佳实施例的流程示意图；
图4是本发明实施例方案的解密解扰过程示意图；
图5是本发明实施例中根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据的流程示意图；
图6是本发明数字电视终端较佳实施例的功能模块示意图。
为了使本发明的技术方案更加清楚、明了，下面将结合附图作进一步详述。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明实施例的解决方案主要是：数字电视终端条件接收的传输流的解密解扰操作由云端服务器来完成，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，以降低产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力。
如图3所示，本发明较佳实施例提出一种数字电视终端条件接收方法，包括：
步骤S101，获取传输流以及PSI，所述PSI包括条件接收表和节目映射表；
由于现有的CAS在终端CA解密解扰时必须包含解密解扰模块，使得现有的数字电视终端的条件接收需要依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而增加了产品的生产成本，降低了产品的市场竞争力。
本实施例考虑到，目前各种数字电视终端的接收设备都在逐步智能化，不管是智能一体机，还是智能机顶盒，或是各种手持电视终端，通过网络连接互联网几乎成为了产品的标准配置。
与此同时，云计算的发展日趋成熟，各种各样基于云计算的应用层出不穷。不管是从技术实施的角度，还是从成本控制的角度考虑，都使得云计算技术的选择成为了一种可能。
因此，本发明实施例方案通过云端服务器来完成数字电视终端条件接收的解密解扰操作，可以使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，从而降低了产品的生产成本，增强产品竞争力。
首先，由数字电视终端获取传输流以及PSI（Program Specific Information，节目特定信息），所述PSI包括条件接收表和节目映射表。
其中，数字电视终端可以是智能一体机，也可以是智能机顶盒，还可以是各种手持电视终端等。
步骤S102，根据所述PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
本实施例将数字电视终端CA的解密解扰程序部署在网络云端服务器。
其中，数字电视终端与云端服务器网络连接，云端服务器向数字电视终端提供有解密解扰程序的服务接口。数字电视终端根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，获取由云端服务器对传输流进行解密解扰处理后反馈的数据。
具体地，首先，数字电视终端通过PSI中的条件接收表获取EMM数据；然后，将所述EMM数据和终端设备信息（如MAC（MediaAccess Control，介质访问控制）地址、序列号、设备类型等）封装成网络包，通过协议（如HTTP等网络协议）发送给云端服务器，由云端服务器根据接收的网络包对终端用户进行相应的授权判断，并返回处理结果。
数字电视终端通过协议（如HTTP等网络协议）调用云端服务器部署的解密解扰程序的服务接口，获取云端服务器的服务接口反馈的第一数据，该第一数据包括云端服务器反馈的上述处理结果。
数字电视终端解析所述第一数据，判断终端用户是否拥有授权；若终端用户无授权，则提示用户当前节目未授权。
若终端用户有授权，则通过PSI中的节目映射表获取ECM数据。
将所述EMM数据和ECM数据封装成网络包，发送给云端服务器，由云端服务器根据接收的网络包进行解密解扰处理及相应的计算，并返回处理结果。
数字电视终端通过协议（如HTTP等网络协议）调用部署在云端服务器的解密解扰程序的服务接口，并获取服务接口返回的第二数据，该第二数据包括云端服务器反馈的上述第二次处理结果。
步骤S103，从所述反馈的数据中获取所述传输流的控制字；
之后，数字电视终端解析云端服务器的服务接口反馈的第二数据，获取所述传输流的控制字CW。
步骤S104，将所述控制字送入解码器对所述传输流进行解扰。
最后，数字电视终端将解析得到的控制字CW送入解码器，完成对传输流的解扰。
本实施例方案的解密解扰过程可以如图4所示。
本实施例通过上述方案，通过获取传输流以及PSI；根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；从反馈的数据中获取传输流的控制字；将控制字送入解码器进行解码，由此，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。
更为具体地，如图5所示，上述步骤S102：根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据包括：
步骤S1021，通过PSI中的条件接收表获取EMM数据；
步骤S1022，将所述EMM数据和终端设备信息封装成网络包，发送给云端服务器；
步骤S1023，调用云端服务器提供的解密解扰程序的服务接口，获取云端服务器反馈的第一数据；
步骤S1024，解析所述第一数据，判断终端用户是否拥有授权；若授权，则进入步骤S1025；否则，进入步骤S1028；
步骤S1025，通过PSI中的节目映射表获取ECM数据；
步骤S1026，将所述EMM数据和ECM数据封装成网络包；
步骤S1027，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第二数据。
步骤S1028，提示用户当前节目未授权。
本实施例通过上述方案，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。
对应地，提出本发明数字电视终端实施例。
如图6所示，本发明较佳实施例提出一种数字电视终端，包括：数据流获取模块201、调用获取模块202、控制字获取模块203及解码模块204，其中：
数据流获取模块201，用于获取传输流以及PSI，所述PSI包括条件接收表和节目映射表；
调用获取模块202，用于根据所述PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
控制字获取模块203，用于从所述反馈的数据中获取所述传输流的控制字；
解码模块204，用于将所述控制字送入解码器对所述传输流进行解扰。
由于现有的CAS在终端CA解密解扰时必须包含解密解扰模块，使得现有的数字电视终端的条件接收需要依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而增加了产品的生产成本，降低了产品的市场竞争力。
本实施例考虑到，目前各种数字电视终端的接收设备都在逐步智能化，不管是智能一体机，还是智能机顶盒，或是各种手持电视终端，通过网络连接互联网几乎成为了产品的标准配置。
与此同时，云计算的发展日趋成熟，各种各样基于云计算的应用层出不穷。不管是从技术实施的角度，还是从成本控制的角度考虑，都使得云计算技术的选择成为了一种可能。
因此，本发明实施例方案通过云端服务器来完成数字电视终端条件接收的解密解扰操作，可以使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，从而降低了产品的生产成本，增强产品竞争力。
首先，由数字电视终端获取传输流以及PSI（Program Specific Information，节目特定信息），所述PSI包括条件接收表和节目映射表。
其中，数字电视终端可以是智能一体机，也可以是智能机顶盒，还可以是各种手持电视终端等。
本实施例将数字电视终端CA的解密解扰程序部署在网络云端服务器。
其中，数字电视终端与云端服务器网络连接，云端服务器向数字电视终端提供有解密解扰程序的服务接口。数字电视终端根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，获取由云端服务器对传输流进行解密解扰处理后反馈的数据。
具体地，首先，数字电视终端通过PSI中的条件接收表获取EMM数据；然后，将所述EMM数据和终端设备信息（如MAC地址、序列号、设备类型等）封装成网络包，通过协议（如HTTP等网络协议）发送给云端服务器，由云端服务器根据接收的网络包对终端用户进行相应的授权判断，并返回处理结果。
数字电视终端通过协议（如HTTP等网络协议）调用云端服务器部署的解密解扰程序的服务接口，并获取云端服务器的服务接口反馈的第一数据，该第一数据包括云端服务器反馈的上述处理结果。
数字电视终端解析所述第一数据，判断终端用户是否拥有授权；若终端用户无授权，则提示用户当前节目未授权。
若终端用户有授权，则通过PSI中的节目映射表获取ECM数据。
将所述EMM数据和ECM数据封装成网络包，发送给云端服务器，由云端服务器根据接收的网络包进行解密解扰处理，并返回处理结果。
数字电视终端通过协议（如HTTP等网络协议）调用云端服务器提供的解密解扰程序的服务接口，获取云端服务器反馈的第二数据，该第二数据包括云端服务器反馈的上述第二次处理结果。
之后，数字电视终端解析云端服务器反馈的第二数据，获取所述传输流的控制字CW。
最后，数字电视终端将解析得到的控制字CW送入解码器，完成对传输流的解扰。
本实施例方案的解密解扰过程可以如图4所示。
本实施例通过上述方案，通过获取传输流以及PSI；根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；从反馈的数据中获取传输流的控制字；将控制字送入解码器进行解码，由此，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。
更为具体地，所述调用获取模块202，还用于通过PSI中的条件接收表获取EMM数据；将所述EMM数据和终端设备信息封装成网络包，发送给云端服务器；调用云端服务器提供的解密解扰程序的服务接口，获取云端服务器反馈的第一数据；解析所述第一数据，判断终端用户是否拥有授权；在终端用户无授权时，提示用户当前节目未授权。若有授权，则通过PSI中的节目映射表获取ECM数据；将所述EMM数据和ECM数据封装成网络包，发送给云端服务器；调用云端服务器提供的解密解扰程序的服务接口，获取云端服务器反馈的第二数据。
所述控制字获取模块203还用于解析所述第二数据，获取所述传输流的控制字。
本实施例通过上述方案，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。
此外，本发明一种数字电视终端条件接收系统，包括：云端服务器和与所述云端服务器网络连接的数字电视终端；其中：
所述云端服务器为数字电视终端提供有解密解扰程序的服务接口，用于为数字电视终端的传输流进行解密解扰处理计算；
所述数字电视终端为如上实施例所述的终端。
本实施例通过云端服务器实现数字电视终端的解密解扰的过程及原理，请参照上述各实施例，在此不再赘述。
本发明实施例数字电视终端条件接收方法、终端及系统，通过获取传输流以及PSI；根据PSI中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；从反馈的数据中获取传输流的控制字；将控制字送入解码器进行解码，由此，使得数字电视终端的条件接收不再依赖于各种基于解密解扰模块的硬件设备，如智能卡、内置解扰芯片等，从而降低了产品的生产成本，减少集成工作，加快产品的研发周期，增强产品竞争力；此外，基于云计算的软件结构，拥有更好的扩展性，为丰富多彩的增值业务开展提供方便。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (15)

  1. 一种数字电视终端条件接收方法，其特征在于，包括：
    获取传输流以及节目特定信息，所述节目特定信息包括条件接收表和节目映射表；
    根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
    从所述反馈的数据中获取所述传输流的控制字；
    将所述控制字送入解码器对所述传输流进行解扰。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据的步骤包括：
    通过节目特定信息中的条件接收表获取授权管理信息；
    将所述授权管理信息和终端设备信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第一数据；
    解析所述第一数据，判断终端用户是否拥有授权；
    若有授权，则通过节目特定信息中的节目映射表获取授权控制信息；
    将所述授权管理信息和授权控制信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第二数据。
  3. 根据权利要求2所述的方法，其特征在于，所述从反馈的数据中获取所述传输流的控制字的步骤包括：
    解析所述第二数据，获取所述传输流的控制字。
  4. 根据权利要求2所述的方法，其特征在于，所述解析第一数据，判断终端用户是否拥有授权的步骤之后还包括：
    若终端用户无授权，则提示用户当前节目未授权。
  5. 根据权利要求2所述的方法，其特征在于，所述终端设备信息包括：终端设备的MAC地址、序列号以及设备类型。
  6. 一种数字电视终端，其特征在于，包括：
    数据流获取模块，用于获取传输流以及节目特定信息，所述节目特定信息包括条件接收表和节目映射表；
    调用获取模块，用于根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
    控制字获取模块，用于从所述反馈的数据中获取所述传输流的控制字；
    解码模块，用于将所述控制字送入解码器对所述传输流进行解扰。
  7. 根据权利要求6所述的终端，其特征在于，
    所述调用获取模块，还用于通过节目特定信息中的条件接收表获取授权管理信息；将所述授权管理信息和终端设备信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第一数据；解析所述第一数据，判断终端用户是否拥有授权；若有授权，则通过节目特定信息中的节目映射表获取授权控制信息；将所述授权管理信息和授权控制信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第二数据。
  8. 根据权利要求7所述的终端，其特征在于，
    所述控制字获取模块，还用于解析所述第二数据，获取所述传输流的控制字。
  9. 根据权利要求7 所述的终端，其特征在于，
    所述调用获取模块，还用于在终端用户无授权时，提示用户当前节目未授权。
  10. 根据权利要求7 所述的终端，其特征在于，所述终端设备信息包括：终端设备的MAC地址、序列号以及设备类型。
  11. 一种数字电视条件接收系统，其特征在于，包括：云端服务器和与所述云端服务器网络连接的数字电视终端；其中：
    所述云端服务器为数字电视终端提供有解密解扰程序的服务接口，用于为数字电视终端的传输流进行解密解扰处理；
    所述数字电视终端包括：
    数据流获取模块，用于获取传输流以及节目特定信息，所述节目特定信息包括条件接收表和节目映射表；
    调用获取模块，用于根据所述节目特定信息中的条件接收表和节目映射表，调用云端服务器提供的解密解扰程序的服务接口，并获取所述服务接口反馈的数据；
    控制字获取模块，用于从所述反馈的数据中获取所述传输流的控制字；
    解码模块，用于将所述控制字送入解码器对所述传输流进行解扰。
  12. 根据权利要求11所述的系统，其特征在于，
    所述调用获取模块，还用于通过节目特定信息中的条件接收表获取授权管理信息；将所述授权管理信息和终端设备信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第一数据；解析所述第一数据，判断终端用户是否拥有授权；若有授权，则通过节目特定信息中的节目映射表获取授权控制信息；将所述授权管理信息和授权控制信息封装成网络包，通过网络协议调用部署在云端服务器的解密解扰程序的服务接口，并获取所述服务接口返回的第二数据。
  13. 根据权利要求12所述的系统，其特征在于，
    所述控制字获取模块，还用于解析所述第二数据，获取所述传输流的控制字。
  14. 根据权利要求12所述的系统，其特征在于，
    所述调用获取模块，还用于在终端用户无授权时，提示用户当前节目未授权。
  15. 根据权利要求12所述的系统，其特征在于，所述终端设备信息包括：终端设备的MAC地址、序列号以及设备类型。
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