WO2011143857A1 - 一种数据卡、数据卡系统以及实现多媒体业务的方法 - Google Patents

一种数据卡、数据卡系统以及实现多媒体业务的方法 Download PDF

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Publication number
WO2011143857A1
WO2011143857A1 PCT/CN2010/076137 CN2010076137W WO2011143857A1 WO 2011143857 A1 WO2011143857 A1 WO 2011143857A1 CN 2010076137 W CN2010076137 W CN 2010076137W WO 2011143857 A1 WO2011143857 A1 WO 2011143857A1
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Prior art keywords
module
emm
data card
multimedia service
multimedia
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PCT/CN2010/076137
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English (en)
French (fr)
Inventor
吴清亮
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP10851615.4A priority Critical patent/EP2453630A4/en
Priority to BR112012004065-0A priority patent/BR112012004065A2/pt
Publication of WO2011143857A1 publication Critical patent/WO2011143857A1/zh

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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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • 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
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • 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 present invention relates to the field of digital mobile multimedia broadcasting, and in particular, to a data card, a data card system, and a method for implementing multimedia services on the data card.
  • the content carrier needs to scramble the program stream, and only authorized users can watch the program. After the user is authorized, the program stream is received, and then the program stream is descrambled before being played.
  • a data card is a mobile terminal device for data services used on a computer, allowing users to use mobile data services anytime and anywhere. Adding a broadcast signal receiving chip to the data card enables multimedia playback and is inexpensive, and is a popular receiving terminal.
  • the mobile terminal needs to purchase related services from the service provider and obtain the Entitlement Management Message (EMM).
  • EMM Entitlement Management Message
  • the scheme mainly completes the ordering and playing of the scrambled multimedia data through the cooperation of the broadcast network and the mobile communication network.
  • the ordering and playing system is composed of a data card and an application processor (AP, Application Processor).
  • the data card is composed of a broadcast signal receiving and demodulating chip, a demultiplexing module, a descrambling module, a conditional access system (CAS), and a communication network access module.
  • the AP can generally be a personal computer, a personal digital assistant (PDA), a netbook, etc., and the ordering sub-module completes the ordering interaction process through the mobile communication network and the multimedia service providing server.
  • the receiving and demodulating chip is responsible for receiving and demodulating the digital broadcast signal, and after obtaining the data frame, the demultiplexed module demultiplexes the scrambled media data block and the authorization control information (ECM, Entitlement). Control Message), then send the ECM to the CAS module, and send the scrambled media data block to the descrambling module; the Entitlement Management Message (EMM) is transmitted to the CAS through the mobile communication network channel, and the CAS module is based on the EMM and ECM.
  • ECM Entitlement Management Message
  • CW Control Word
  • the scrambled media data block is descrambled.
  • the player submodule is transmitted to the AP through the USB port, and the player submodule of the AP is obtained. Decode and play the multimedia stream.
  • the solution transmits the scrambled multimedia stream through the broadcast network, and uses the interactive function of the mobile communication network to complete the acquisition of the multimedia service subscription and the authorization management information. Therefore, the mobile terminal in the solution must have the mobile communication capability and can only cooperate closely with the communication network. In order to achieve the ordering and playback of multimedia services. When the mobile terminal does not have the mobile communication capability, the solution cannot achieve the ordering and playing of the scrambled multimedia service.
  • the present invention provides a data card, a data card system, and a method for implementing a multimedia service, thereby solving the problem that the mobile terminal device without the communication network access cannot complete the subscription of the multimedia service and the acquisition of the authorization management information.
  • the present invention provides a data card device including a broadcast signal receiving and demodulating chip, a demultiplexing module, a descrambling module, and a conditional access system (CAS) module, which also includes an internet access module and authorization management information (EMM) a decryption module, the Internet access module may be connected to the multimedia service providing server via an Internet, and the EMM decryption module is respectively connected to the Internet access module and the CAS module, wherein:
  • the Internet access module is configured to: provide an Internet interface to the multimedia service providing server; and receive the encrypted EMM delivered by the multimedia service providing server;
  • the EMM decryption module is configured to decrypt the EMM received by the Internet access module and send the decrypted EMM to the CAS module.
  • the data card device of the present invention can be coupled to an application processor (AP).
  • the CAS module may be configured to: calculate a control word (CW) according to the authorization control information (ECM) and the decrypted EMM, and send the signal to the descrambling module; the descrambling module may be configured to descramble the scrambled media data block according to the CW , get The multimedia stream is sent to the AP.
  • ECM authorization control information
  • the invention also provides a data card system comprising a data card and an application processor (AP), wherein:
  • the data card is configured to: provide an AP with an Internet interface to the multimedia service providing server, acquire and decrypt the encrypted authorization management information (EMM) delivered by the multimedia service providing server; and receive the broadcast signal, and use the decrypted EMM to Obtaining a multimedia stream in the broadcast signal and sending it to the AP;
  • EMM encrypted authorization management information
  • the AP is configured to: log in to the multimedia service providing server based on the Internet interface provided by the data card, complete the subscription of the multimedia service; and play the multimedia stream sent by the data card.
  • the data card may include: a broadcast signal receiving and demodulating chip, a demultiplexing module, a descrambling module, a CAS module, an EMM decrypting module, and an internet access module, wherein:
  • the broadcast signal receiving and demodulating chip may be configured to demodulate the broadcast signal to obtain a data frame;
  • the demultiplexing module may be configured to demultiplex the data frame to obtain a scrambled media data block and authorization control information (ECM) ), sending the scrambled media data block to the descrambling module, and sending the ECM to the CAS module;
  • ECM authorization control information
  • the Internet access module may be configured to provide an interface to the multimedia service providing server, and receive the encrypted EMM delivered by the multimedia service providing server;
  • the EMM decryption module may be configured to decrypt the EMM received by the Internet access module, and send the decrypted EMM to the CAS module;
  • the CAS module may be configured to calculate a control word (CW) according to the ECM and the decrypted EMM, and send the signal to the descrambling module;
  • CW control word
  • the descrambling module can be configured to descramble the scrambled media data block according to the CW to obtain a multimedia stream and send it to the AP.
  • the AP may include an ordering module and a playing module, where: the ordering module may be configured to log in to the multimedia service providing server through the Internet interface provided by the data card, and perform service ordering after identity authentication; the playing module may be configured to receive the multimedia stream sent by the data card. , decode and play it.
  • the present invention also provides a method for implementing multimedia services on a data card, including: The application processor logs in the multimedia service providing server based on the Internet interface provided by the data card, and performs multimedia service ordering;
  • the data card receives a broadcast signal from the broadcast network, processes the broadcast signal with the decrypted EMM, obtains a multimedia stream therefrom, and transmits the multimedia stream to the application processor for playback.
  • the application processor can log in to the multimedia service providing server to subscribe to the required multimedia service by means of an account and a password.
  • the process of processing the broadcast signal by using the decrypted EMM, and obtaining the multimedia stream therefrom may include: demultiplexing the authorization control information (ECM) and the scrambled media data block from the broadcast signal; calculating according to the ECM and the decrypted EMM Control word (CW); descrambles the scrambled media data block into a multimedia stream according to the CW.
  • ECM authorization control information
  • CW decrypted EMM Control word
  • the method of the present invention provides a mobile terminal with Internet function to provide a multimedia service subscription through the Internet, and provides a plurality of ways for the mobile terminal to implement multimedia services.
  • FIG. 1 is a schematic diagram of a multimedia network subscription and authorization management information acquisition scheme completed by a communication network access method
  • FIG. 2 is a block diagram of a data card system according to an embodiment of the present invention.
  • Figure 3 is a flow chart of an embodiment of the present invention.
  • the inventive concept of the present invention is: using the function of connecting to the Internet provided by the data card device, completing the subscription of the multimedia service and the acquisition of the authorization control information through the Internet, and acquiring the broadcast signal through the broadcast network by using the function of the connection network provided by the data card device. (ie multimedia service data), played through the AP.
  • the data card of the present invention includes a broadcast signal receiving and demodulating chip, a demultiplexing module, a descrambling module, and
  • an Internet access module and an EMM decryption module are also included.
  • the Internet access module is connected to the multimedia service providing server via the Internet, and the EMM decryption module is respectively connected to the Internet access module and the CAS module, wherein:
  • the Internet access module is configured to: provide an Internet interface to the multimedia service providing server, so that the AP completes the subscription of the multimedia service through the Internet; and receives the encrypted EMM delivered by the multimedia service providing server;
  • the EMM decryption module is configured to decrypt the EMM received by the Internet access module and send the decrypted EMM to the CAS module.
  • the subscription module of the AP may perform user identity authentication with the multimedia service providing server through a private feature such as a certificate or an account, and log in to the multimedia service providing server to subscribe to the required multimedia service by using an account and a password, and the multimedia service providing server according to the account
  • the private characteristic information is sent to the encrypted authorization management information to the data card, and the encrypted authorization management information is decrypted by the EMM decryption module, and then the CAS module calculates the CW according to the ECM and the decrypted EMM, and the descrambling module obtains the CW and then scrambles
  • the multimedia data block is descrambled, and the multimedia sub-module is transmitted to the player sub-module of the AP for decoding and playing the multimedia data.
  • the providing server delivers the encrypted authorization management information according to the private feature information of the account.
  • FIG. 2 is a block diagram of a data card system in accordance with an embodiment of the present invention. It is mainly composed of two parts, a data card and an AP.
  • the data card device is connected to the AP and can be connected by USB, Bluetooth or infrared, etc., wherein:
  • the data card is configured to: provide an AP with an Internet interface to the multimedia service providing server, obtain an encrypted EMM delivered by the multimedia service providing server, and receive a broadcast signal, and use the decrypted EMM to obtain a multimedia stream from the broadcast signal and send the data to the AP for playing.
  • the data card is composed of a broadcast signal receiving and demodulating chip, a demultiplexing module, a descrambling module, a CAS module, an EMM decrypting module, and an internet access module, wherein:
  • the receiving and demodulating chip is configured to demodulate the broadcast signal to obtain a data frame
  • the demultiplexing module is configured to: demultiplex the data frame, obtain the scrambled media data block and the ECM, send the scrambled media data block to the descrambling module, and send the ECM to the CAS module;
  • the internet access module is set Providing an interface to the multimedia service providing server, and receiving the encrypted EMM delivered by the multimedia service providing server;
  • the EMM decryption module is configured to decrypt the EMM received by the Internet access module, and send the decrypted EMM to the CAS module;
  • the CAS module is configured to calculate the CW according to the ECM and the decrypted EMM, and send the CW to the descrambling module;
  • the descrambling module is configured to descramble the scrambled media data block according to the CW, to obtain a multimedia stream, and send the multimedia stream to the AP;
  • the AP is configured to: log in to the multimedia service providing server based on the Internet interface provided by the data card, complete the subscription of the multimedia service; and play the multimedia stream sent by the data card.
  • the AP consists of a subscription module and a playback module, where:
  • the ordering module is configured to log in to the multimedia service providing server through the Internet interface provided by the data card, and perform service ordering after identity authentication;
  • the play module is configured to receive the multimedia stream sent by the data card, decode and play it.
  • the multimedia service providing server is used for authenticating the AP, and after the identity authentication and subscription service, the authorization management information EMM of the service subscribed by the user is sent to the data card.
  • FIG. 3 is a flowchart of an embodiment of the present invention, including the following steps:
  • Step 301 The subscription sub-module of the AP accesses the multimedia service providing server to perform identity authentication and service subscription through the Internet access module of the data card;
  • the Internet access module sends a service request (ServiceReq) to the multimedia service providing server based on the trigger of the subscription module.
  • ServiceReq a service request
  • Step 302 The multimedia service providing server sends an authorization management letter for the service subscribed by the user.
  • Information EMM to data card
  • Step 303 The receiving and demodulating chip on the data card side acquires a broadcast signal to obtain a data frame, and sends the data frame to the demultiplexing module.
  • Step 304 The demultiplexing module solves the ECM sending to the CAS, and extracts the scrambled media data block and sends it to the descrambling module;
  • Step 305 The CAS calculates the CW according to the EMM that is sent by the Internet and decrypted and the ECM that has been received, and then transmits the CW to the descrambling module.
  • Step 306 The descrambling module uses the CW to descramble the scrambled media data block into a multimedia stream.
  • Step 307 The AP playing module decodes and plays the multimedia stream.
  • the method and system of the present invention provides a mobile terminal with internet function to subscribe to a multimedia service through the Internet, and provides a plurality of ways for the mobile terminal to implement multimedia services.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

本发明公开了一种数据卡、数据卡系统以及实现多媒体业务的方法，从而解决无通信网接入的移动终端设备无法完成多媒体业务的订购和授权管理信息获取的问题。所述数据卡设备包括互联网接入模块和EMM解密模块，所述互联网接入模块可通过互联网连接至多媒体业务提供服务器，所述EMM解密模块分别与互联网接入模块和CAS模块相连，其中：所述互联网接入模块设置成：提供到多媒体业务提供服务器的互联网接口，以及接收多媒体业务提供服务器下发的加密的EMM，所述EMM解密模块设置成解密所述互联网接入模块接收的EMM，并将解密后的EMM发送至所述CAS模块。

Description

一种数据卡、 数据卡系统以及实现多媒体业务的方法
技术领域
本发明涉及数字移动多媒体广播领域， 尤其涉及一种数据卡、 数据卡系 统， 以及在该数据卡上实现多媒体业务的方法。
背景技术
近年来， 数字移动多媒体广播技术尤其是移动电视技术发展迅速， 各种 标准为移动多媒体广播终端用户提供了丰富多彩的内容， 譬如新闻、 体育节 目、 综艺、 电视剧以及电影等节目， 用户可以根据自己的爱好选择移动多媒 体广播的服务节目。
内容运营商为了实现多媒体广播系统的有偿服务， 需要对节目流进行加 扰， 只有经过授权的用户才能收看节目。 用户得到授权后， 接收节目流， 然 后解扰节目流， 才可以播放。
数据卡是在电脑上使用的一种数据业务的移动终端装置， 让用户可以随 时随地地使用移动数据业务。 在数据卡上增加一个广播信号接收芯片， 就可 以实现多媒体播放， 并且价格低廉， 是比较受欢迎的一种接收终端。
但是在播放付费多媒体业务前移动终端需要从业务运营商处购买相关业 务， 并获得授权管理信息 （EMM, Entitlement Management Message ) , 目前 数据卡移动终端中完成订购和获取授权管理信息的方案如图 1所示。 其方案 主要通过广播网与移动通信网协作完成加扰多媒体数据的订购和播放， 其订 购和播放系统由数据卡和应用处理器（AP, Application Processor ) 两部分组 成。 数据卡由一个广播信号接收与解调芯片、 解复用模块、 解扰模块以及条 件接收系统 ( CAS: Conditional Access System ) 、 通信网接入模块组成。 AP 一般可以是个人电脑、 掌上电脑（PDA: Personal Digital Assistant ) 、 上网本 等， 其订购子模块通过移动通信网与多媒体业务提供服务器完成订购交互流 程。 接收与解调芯片负责数字广播信号的接收与解调， 得到数据帧后由解复 用模块解复用得到加扰的媒体数据块和授权控制信息 （ECM, Entitlement Control Message ) , 然后把 ECM送给 CAS模块， 把加扰的媒体数据块送给 解扰模块； 授权管理信息 （EMM, Entitlement Management Message )通过移 动通信网信道传输给 CAS , CAS模块根据 EMM和 ECM算出控制字 （ CW: Control Word )， 解扰模块得到 CW后对加扰的媒体数据块进行解扰， 得到多 媒体流后，通过 USB端口传送给 AP的播放器子模块， AP的播放器子模块对 多媒体流进行解码和播放。
该方案通过广播网发送加扰多媒体流， 利用移动通信网的交互功能完成 多媒体业务订购和授权管理信息的获取， 因此该方案中的移动终端必须具备 移动通信能力， 并且仅能与通信网密切合作才能实现多媒体业务的订购和播 放。 当移动终端不具备移动通信能力时该方案就无法实现加扰多媒体业务的 订购和播放。
发明内容
本发明提供一种数据卡、 数据卡系统以及实现多媒体业务的方法， 从而 解决无通信网接入的移动终端设备无法完成多媒体业务的订购和授权管理信 息获取的问题。
本发明提供了一种数据卡设备， 包括广播信号接收与解调芯片、 解复用 模块、 解扰模块和条件接收系统（CAS )模块， 其还包括互联网接入模块和 授权管理信息（EMM )解密模块， 所述互联网接入模块可通过互联网连接至 多媒体业务提供服务器， 所述 EMM解密模块分别与互联网接入模块和 CAS 模块相连， 其中：
所述互联网接入模块设置成： 提供到多媒体业务提供服务器的互联网接 口； 以及接收多媒体业务提供服务器下发的加密的 EMM;
所述 EMM解密模块设置成解密所述互联网接入模块接收的 EMM,并将 解密后的 EMM发送至所述 CAS模块。
本发明的数据卡设备可与应用处理器（AP )相连。 CAS模块可设置成： 根据授权控制信息（ECM )和解密后的 EMM计算出控制字（CW ) , 发送至 解扰模块； 解扰模块可设置成根据 CW对加扰的媒体数据块进行解扰， 得到 多媒体流， 送至 AP。
本发明还提供了一种数据卡系统， 包括数据卡和应用处理器（AP ) , 其 中：
所述数据卡设置成： 为 AP提供到多媒体业务提供服务器的互联网接口， 获取多媒体业务提供服务器下发的加密的授权管理信息 ( EMM )并进行解密； 以及接收广播信号， 利用解密后的 EMM从广播信号中获取多媒体流发送至 AP;
所述 AP设置成： 基于所述数据卡提供的互联网接口登录多媒体业务提 供服务器， 完成多媒体业务的订购； 以及播放数据卡发送的多媒体流。
本发明的系统中， 数据卡可包括： 广播信号接收与解调芯片、 解复用模 块、 解扰模块、 CAS模块、 EMM解密模块和互联网接入模块， 其中：
广播信号接收与解调芯片可设置成对广播信号进行解调得到数据帧； 所述解复用模块可设置成对数据帧进行解复用， 得到加扰的媒体数据块 和授权控制信息 （ECM ) ， 将加扰的媒体数据块发送至解扰模块， 将 ECM 发送至 CAS模块；
互联网接入模块可设置成提供到多媒体业务提供服务器的接口， 以及接 收多媒体业务提供服务器下发的加密的 EMM;
EMM解密模块可设置成解密互联网接入模块接收的 EMM, 将解密后的 EMM发送至 CAS模块；
CAS模块可设置成根据 ECM和解密后的 EMM计算出控制字 （ CW ) , 发送至解扰模块；
解扰模块可设置成根据 CW对加扰的媒体数据块进行解扰， 得到多媒体 流, 发送至 AP。
AP可包括订购模块和播放模块， 其中： 订购模块可设置成通过数据卡提 供的互联网接口登录多媒体业务提供服务器， 在进行身份认证后进行业务订 购； 播放模块可设置成接收数据卡发送的多媒体流， 对其进行解码和播放。
本发明还提供了一种在数据卡上实现多媒体业务的方法， 包括： 应用处理器基于数据卡提供的互联网接口登录多媒体业务提供服务器， 进行多媒体业务的订购；
所述数据卡从互联网接口接收多媒体业务提供服务器下发的加密的授权 管理信息 （ EMM ) , 并对接收到的 EMM进行解密；
所述数据卡从广播网接收广播信号， 利用解密后的 EMM对广播信号进 行处理， 从中获取多媒体流， 将所述多媒体流发送至所述应用处理器进行播 放。
本发明的方法中， 应用处理器可通过账户和密码的方式登录多媒体业务 提供服务器订购所需多媒体业务。
利用解密后的 EMM对广播信号进行处理， 从中获取多媒体流的步骤可 包括： 从广播信号中解复用出授权控制信息（ECM )以及加扰的媒体数据块； 根据 ECM以及解密的 EMM计算出控制字（CW ) ； 根据所述 CW将加扰的 媒体数据块解扰成多媒体流。 釆用本发明所述方法， 为具有互联网功能的移动终端提供了通过互联网 订购多媒体业务的方案， 为移动终端提供多种实现多媒体业务的途径。
附图概述
图 1为通信网接入方式完成多媒体业务订购和授权管理信息获取方案示 意图；
图 2为本发明实施例的数据卡系统框图；
图 3为本发明实施的流程图。
本发明的较佳实施方式
本发明的发明构思是： 利用数据卡设备具备的连接互联网的功能， 通过 互联网完成多媒体业务的订购以及授权控制信息的获取， 利用数据卡设备具 备的连接广播网的功能， 通过广播网获取广播信号 （即多媒体业务数据） ， 通过 AP进行播放。 本发明数据卡除包括广播信号接收与解调芯片、解复用模块、解扰模块、
CAS模块外， 还包括互联网接入模块和 EMM解密模块， 互联网接入模块通 过互联网连接至多媒体业务提供服务器， 该 EMM解密模块分别与互联网接 入模块和 CAS模块相连， 其中：
所述互联网接入模块设置成： 提供到多媒体业务提供服务器的互联网接 口， 以使 AP通过互联网完成多媒体业务的订购； 以及接收多媒体业务提供 服务器下发的加密的 EMM;
所述 EMM解密模块设置成解密所述互联网接入模块接收的 EMM,并将 解密后的 EMM发送至 CAS模块。
具体地， AP的订购模块可以通过证书或账户等私有特征与多媒体业务提 供服务器进行用户身份认证， 使用账户和密码的方式登录多媒体业务提供服 务器订购所需多媒体业务， 多媒体业务提供服务器根据该账户的私有特征信 息下发加密的授权管理信息至数据卡， 加密的授权管理信息通过 EMM解密 模块完成解密， 其后 CAS模块根据 ECM与解密后的 EMM算出 CW, 解扰 模块得到 CW后对加扰的多媒体数据块进行解扰， 得到多媒体流传至 AP的 播放器子模块进行多媒体数据解码和播放。
通过广播网与互联网的协作模式实现多媒体业务。 多媒体业务的订购和 授权管理信息的获取均通过互联网完成， 在互联网中通过证书或账户的私有 特征信息进行身份认证确保设备为可信任移动终端， 使用账户等方式完成订 购、 付费等功能， 多媒体业务提供服务器根据该账户的私有特征信息下发加 密的授权管理信息。
下面结合附图对本发明做详细的说明。
图 2为本发明实施例的数据卡系统框图。 主要由两部分组成， 数据卡和 AP, 所述数据卡设备与 AP相连， 可通过 USB、 蓝牙或红外等方式连接， 其 中：
数据卡设置成： 为 AP提供到多媒体业务提供服务器的互联网接口， 获 取多媒体业务提供服务器下发的加密的 EMM; 以及接收广播信号，利用解密 后的 EMM从广播信号中获取多媒体流发送至 AP播放； 如图 2所示， 数据卡由广播信号接收与解调芯片、 解复用模块、 解扰模 块、 CAS模块、 EMM解密模块和互联网接入模块组成， 其中：
接收和解调芯片设置成对广播信号进行解调得到数据帧；
解复用模块设置成： 对数据帧进行解复用， 得到加扰的媒体数据块和 ECM, 将加扰的媒体数据块发送至解扰模块， 将 ECM发送至 CAS模块； 互联网接入模块设置成提供到多媒体业务提供服务器的接口， 以及接收 多媒体业务提供服务器下发的加密的 EMM;
EMM解密模块设置成解密互联网接入模块接收到的 EMM, 将解密后的 EMM发送至 CAS模块；
CAS模块设置成根据 ECM与解密后的 EMM计算出 CW,发送至解扰模 块；
解扰模块设置成根据 CW对加扰的媒体数据块进行解扰，得到多媒体流， 送至 AP;
所述 AP设置成： 基于数据卡提供的互联网接口登录多媒体业务提供服 务器， 完成多媒体业务的订购； 以及播放数据卡发送的多媒体流。
如图 2所示， AP由订购模块、 播放模块组成， 其中：
订购模块设置成通过数据卡提供的互联网接口登录多媒体业务提供服务 器， 在进行身份认证后进行业务订购；
播放模块设置成接收数据卡发送的多媒体流， 对其进行解码和播放。 本文所述多媒体业务提供服务器用于对 AP进行身份认证， 并在身份认 证及订购业务后， 向数据卡下发该用户所订购业务的授权管理信息 EMM。
图 3为本发明实施例的流程图， 包括以下步骤：
步骤 301 , AP的订购子模块通过数据卡的互联网接入模块接入多媒体业 务提供服务器进行身份认证和业务订购；
互联网接入模块基于订购模块的触发， 向多媒体业务提供服务器发送服 务请求 ( ServiceReq ) 。
步骤 302, 多媒体业务提供服务器下发该用户所订购业务的授权管理信 息 EMM至数据卡；
步骤 303 , 数据卡侧的接收和解调芯片获取广播信号得到数据帧， 并送 给解复用模块；
步骤 304,解复用模块解出 ECM送给 CAS,解出加扰的媒体数据块送给 解扰模块；
步骤 305 , CAS根据互联网下发并经过解密的 EMM和已经收到的 ECM 算出 CW后传给解扰模块；
步骤 306, 解扰模块利用 CW把加扰的媒体数据块解扰成多媒体流； 步骤 307, AP的播放模块对多媒体流进行解码和播放。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
与现有技术相比， 本发明的方法和系统为具有互联网功能的移动终端提 供了通过互联网订购多媒体业务的方案， 为移动终端提供多种实现多媒体业 务的途径。

Claims

权 利 要 求 书
1、 一种数据卡设备， 包括广播信号接收与解调芯片、 解复用模块、 解扰 模块和条件接收系统 CAS模块， 其特征在于， 所述数据卡设备还包括互联网 接入模块和授权管理信息 EMM解密模块， 所述互联网接入模块可通过互联 网连接至多媒体业务提供服务器， 所述 EMM解密模块分别与互联网接入模 块和 CAS模块相连， 其中：
所述互联网接入模块设置成： 提供到多媒体业务提供服务器的互联网接 口； 以及接收多媒体业务提供服务器下发的加密的 EMM;
所述 EMM解密模块设置成解密所述互联网接入模块接收的 EMM,并将 解密后的 EMM发送至所述 CAS模块。
2、 如权利要求 1所述的数据卡设备， 其中：
所述数据卡设备与应用处理器 AP相连。
3、 如权利要求 2所述的数据卡设备， 其中：
所述 CAS模块设置成根据授权控制信息 ECM和解密后的 EMM计算出 控制字 CW, 发送至解扰模块；
所述解扰模块设置成根据所述 CW对加扰的媒体数据块进行解扰， 得到 多媒体流， 并发送至所述 AP。
4、 一种数据卡系统， 包括数据卡和应用处理器 AP, 其中：
所述数据卡设置成： 为所述 AP提供到多媒体业务提供服务器的互联网 接口， 获取多媒体业务提供服务器下发的加密的授权管理信息 EMM并进行 解密； 以及接收广播信号， 利用解密后的 EMM从接收的广播信号中获取多 媒体流发送至 AP;
所述 AP设置成： 基于所述数据卡提供的互联网接口登录多媒体业务提 供服务器， 完成多媒体业务的订购； 以及播放数据卡发送的多媒体流。
5、 如权利要求 4所述的系统， 其中： 所述数据卡包括广播信号接收与解 调芯片、 解复用模块、 解扰模块、 条件接收系统 CAS模块、 EMM解密模块 和互联网接入模块， 其中： 所述广播信号接收与解调芯片设置成对广播信号进行解调得到数据帧； 所述解复用模块设置成对数据帧进行解复用， 得到加扰的媒体数据块和 授权控制信息 ECM, 将加扰的媒体数据块发送至解扰模块， 将 ECM发送至 CAS模块；
所述互联网接入模块设置成提供到多媒体业务提供服务器的接口， 以及 接收多媒体业务提供服务器下发的加密的 EMM;
所述 EMM解密模块设置成解密互联网接入模块接收的 EMM,将解密后 的 EMM发送至 CAS模块；
所述 CAS模块设置成根据 ECM和解密后的 EMM计算出控制字 CW, 发送至解扰模块；
所述解扰模块设置成根据 CW对加扰的媒体数据块进行解扰， 得到多媒 体流， 并发送至 AP。
6、如权利要求 4所述的系统， 其中： 所述 AP包括订购模块和播放模块， 其中：
所述订购模块设置成通过数据卡提供的互联网接口登录多媒体业务提供 服务器， 在进行身份认证后进行业务订购；
所述播放模块设置成接收数据卡发送的多媒体流， 并对接收的多媒体流 进行解码和播放。
7、 一种在数据卡上实现多媒体业务的方法， 包括：
应用处理器基于数据卡提供的互联网接口登录多媒体业务提供服务器， 进行多媒体业务的订购；
所述数据卡从互联网接口接收多媒体业务提供服务器下发的加密的授权 管理信息 EMM , 并对接收到的 EMM进行解密；
所述数据卡从广播网接收广播信号， 利用解密后的 EMM对广播信号进 行处理， 从中获取多媒体流， 将所获取的多媒体流发送至所述应用处理器进 行播放。
8、 如权利要求 7所述的方法， 其中： 登录多媒体业务提供服务器进行多媒体业务的订购的步骤中， 所述应用 处理器是通过账户和密码的方式登录所述多媒体业务提供服务器订购所需的 多媒体业务。
9、 如权利要求 7所述的方法， 其中：
利用解密后的 EMM对广播信号进行处理， 从中获取多媒体流的步骤包 括：
从广播信号中解复用出授权控制信息 ECM以及加扰的媒体数据块； 根据 ECM以及解密的 EMM计算出控制字 CW; 以及
根据所述 CW将加扰的媒体数据块解扰成多媒体流。
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