WO2012075857A1 - 基于条件接收装置的视频点播系统及方法 - Google Patents

基于条件接收装置的视频点播系统及方法 Download PDF

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Publication number
WO2012075857A1
WO2012075857A1 PCT/CN2011/081144 CN2011081144W WO2012075857A1 WO 2012075857 A1 WO2012075857 A1 WO 2012075857A1 CN 2011081144 W CN2011081144 W CN 2011081144W WO 2012075857 A1 WO2012075857 A1 WO 2012075857A1
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module
vod
receiving device
host
interaction module
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PCT/CN2011/081144
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English (en)
French (fr)
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李艳荣
林铠鹏
江楚发
刁勇涛
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深圳国微技术有限公司
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Publication of WO2012075857A1 publication Critical patent/WO2012075857A1/zh

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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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
    • 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 or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T

Definitions

  • the present invention relates to the field of digital television technology, and in particular to a video on demand system based on a conditional receiving device.
  • a conditional access device is a card used to control a user's viewing of authorized digital television programs (including audio, video, data, etc.), and the conditional receiving device allows the digital television operator to authorize the user in the television system. Control and authorization management to achieve paid service for digital TV programs.
  • Conditional access devices are widely used in the European market, and the domestic market is also growing. If the VOD function is added to the digital television receiving system based on the conditional receiving device, it must be welcomed by operators and users. The current conditional access device has not yet implemented the VOD function.
  • a video on demand system based on a conditional receiving device comprising:
  • the condition receiving device and the host are respectively provided with CI (Common An interface of the second communication interaction module of the conditional receiving device is communicably connected to the first communication interaction module of the host by using the CI interface, and the VOD processing module and the human-machine interaction module pass through The CI interface communication connection is described, and the DVB application and decoder are communicatively connected to the CA core module through the CI interface.
  • CI Common An interface of the second communication interaction module of the conditional receiving device is communicably connected to the first communication interaction module of the host by using the CI interface, and the VOD processing module and the human-machine interaction module pass through The CI interface communication connection is described, and the DVB application and decoder are communicatively connected to the CA core module through the CI interface.
  • the present invention also provides a method for video on demand based on a conditional receiving device, which is applied to the above system, the method comprising the steps of:
  • the user enters the VOD mode of the host, and the host sends an instruction to the VOD processing module of the conditional receiving device through the human-machine interaction module.
  • the processing module of the conditional receiving device passes the user information and the corresponding data through the second communication interaction module.
  • a first communication interaction module sent to the host the first communication interaction module of the host receives the user information and corresponding data, and then transmits the data to the VOD server through the IP module;
  • the S2 and the VOD server query the user information table in the database according to the user information, and verify the identity of the user. If the user identity is legal, the process proceeds to the following step S3. Otherwise, the VOD processing module of the conditional receiving device is sent in the opposite direction to the channel in step S1. Return the authentication failure information;
  • the VOD server sends the program list and the user information to the IP module of the host via the IP network, and the IP module of the host receives the second communication that the program list and the user information are sent to the conditional receiving device via the first communication interaction module.
  • the interaction module, the second communication interaction module of the conditional receiving device transmits the program list and the user information to the human-machine interaction module of the host through the VOD processing module, and the human-computer interaction module sends the program list and the user information to the
  • the graphic output module performs display;
  • the user browses and selects according to the program list and the user information displayed on the graphic output module by the host.
  • the control command is sent to the human-computer interaction module through the remote controller, and the human-computer interaction module gives the control instruction to the condition.
  • a VOD processing module of the receiving device the VOD processing module of the conditional receiving device sends the program list and the user information group to the VOD server via the second communication interaction module, the first communication interaction module and the IP module, and the VOD server receives the The program list and the user information find the corresponding program, and then return the specific viewing parameters and the confirmation data to the VOD processing module of the conditional receiving device, and the VOD processing module of the conditional receiving device returns part of the data of the confirmation parameter to the host. ;
  • the interaction module and the IP module are sent to the VOD server, and the VOD server sends the on-demand program stream to the host through the digital television cable/satellite/ground transmission according to the received instruction of the group package, and the program flows through the host DVB application.
  • the decoder sends the CA core module to the conditional receiving device for processing.
  • the method further includes:
  • the user may pause or quit the operation command during the normal video watching process.
  • the human-machine interaction module After receiving the operation command, the human-machine interaction module sends the operation command to the VOD server through the host's IP module through the VOD processing module of the conditional receiving device, VOD.
  • the server pauses or exits processing according to the operation instruction.
  • the invention further provides a conditional receiving device, comprising: a second communication interaction module, a VOD processing module and a CA core module, wherein the second communication interaction module is connected to the VOD processing module, and the VOD processing module is used for Human-computer interaction module communication connection.
  • the technical solution of the present invention has the following beneficial effects: in the video on demand system based on the conditional receiving device provided by the present invention, the conditional receiving device performs communication interaction with the host, and interacts with the VOD server through the IP module of the host, and can pass the condition.
  • the receiving device implements the VOD function.
  • FIG. 1 is a schematic structural diagram of a video on demand system based on a conditional receiving apparatus according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a condition receiving apparatus according to an embodiment of the present invention.
  • the embodiment of the invention provides a video on demand system based on a conditional receiving device. As shown in FIG. 1 , the system includes:
  • the VOD server 110 the host 120 (a television set or a set top box with a CI interface), and a conditional receiving device 130, the VOD server communicatively connects to the host 120, and the host 120 is communicatively coupled to the conditional receiving device 130.
  • the second communication interaction module 133 is communicatively coupled to the first communication interaction module 123, the first communication interaction module 123 is communicatively coupled to the IP module 122, and the second communication interaction module 133 is further coupled to the VOD.
  • the processing module 132 is communicatively coupled.
  • the VOD processing module 132 is communicatively coupled to the human-machine interaction module 124.
  • the human-machine interaction module 124 is communicatively coupled to the graphics output module 125.
  • the DVB application and decoder 121 and the The CA core module 131 is communicatively coupled, and the DVB application and decoder 121 is coupled to the graphics output module 125.
  • condition receiving device 130 and the host 120 are respectively provided with a CI interface, and the second communication interaction module 133 of the condition receiving device 130 passes the first interface of the CI interface and the host 120.
  • the communication interaction module 123 is communicatively connected, the VOD processing module 132 and the human-machine interaction module 124 are communicatively connected through the CI interface, and the DVB application and decoder 121 communicates with the CA core module 131 through the CI interface. connection.
  • the user performs the VOD on-demand process of the above system as follows:
  • the user enters the VOD mode of the host 120, and the host 120 sends an instruction to the VOD processing module 132 of the conditional receiving device 130 through the human-machine interaction module 124.
  • the VOD processing module 132 of the conditional receiving device After receiving the instruction, the VOD processing module 132 of the conditional receiving device inputs the user information and the corresponding The data is sent to the first communication interaction module 123 of the host 120 through the second communication interaction module 133.
  • the first communication interaction module 123 of the host 120 receives the user information and corresponding data and transmits the data to the VOD server 110 through the IP module 122 ( Also become: VOD front end).
  • the VOD server 110 queries the user information table in the database according to the user information to verify the identity of the user. If the user identity is legal, the process proceeds to the following step S3. Otherwise, the VOD of the conditional receiving device 130 is given in the opposite direction to the channel in step S1.
  • the processing module 132 returns authentication failure information.
  • the VOD server 110 sends the program list and other information (including data of pictures, fees, and the like) to the IP module 122 of the host 120 via the IP network, and the IP module 122 of the host 120 receives the program list and other information.
  • a communication interaction module 123 sends the second communication interaction module 133 to the conditional access device 130, and the second communication interaction module 133 of the conditional access device 130 transmits the program list and other information back to the host 120 through the VOD processing module 132.
  • the machine interaction module 124 sends the human-computer interaction module to the graphic output module 125 for display.
  • the user performs browsing selection according to the program list and other information displayed on the graphic output module 125 by the host 120.
  • the control command is sent to the human-machine interaction module 124 through the remote controller, and the human-computer interaction module 124
  • the control instruction is sent to the VOD processing module 132 of the conditional receiving device 130.
  • the VOD processing module 132 of the conditional receiving device 130 is sent to the VOD server 110 via the second communication interaction module 133, the first communication interaction module 123, and the IP module 122.
  • the server 110 searches for a corresponding program according to the received program list and other information, and then returns specific viewing parameters (for example, service)
  • specific viewing parameters for example, service
  • the ID (service identification) or the like and other confirmation data are transmitted to the VOD processing module 132 of the conditional receiving device 130, and the VOD processing of the conditional receiving device 130 Module 132 then returns some of the data (eg, viewing parameters) to host 120.
  • the VOD server 110 sends an on-demand program stream to the host 120 by means of digital television cable/satellite/ground transmission according to the received data, and the program flows through the host.
  • the DVB application and decoder 121 of 120 is decoded and sent to the CA core module 131 of the conditional receiving device 130 for processing.
  • conditional receiving device performs communication interaction with the host, and interacts with the VOD server through the IP module on the host, and can implement the VOD function by using the conditional receiving device.
  • the embodiment of the present invention further provides a conditional receiving device.
  • the condition receiving device 130 includes: a second communication interaction module 133, a VOD processing module 132, and a CA core module 131.
  • the second communication interaction Module 133 is coupled to the VOD processing module 132.
  • the conditional receiving device provided in this embodiment performs communication interaction with the host, and performs interactive communication with the VOD server through the IP module on the host, thereby implementing the VOD function.

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

Abstract

本发明涉及一种基于条件接收装置的视频点播系统及方法，该系统包括：VOD服务器、主机和条件接收装置，所述VOD服务器通信连接所述主机，所述条件接收装置通信连接所述主机。所述主机上设置有DVB应用及解码器、图形输出模块、人机交互模块、IP模块和第一通信交互模块，所述条件接收装置上设置有第二通信交互模块、VOD处理模块和CA核心模块。本发明提供的基于条件接收装置的视频点播系统中，条件接收装置与主机进行通信交互，并通过主机的IP模块与VOD服务器进行交互，能够通过条件接收装置实现VOD功能。

Description

基于条件接收装置的视频点播系统及方法
技术领域
本发明涉及数字电视技术领域，具体是指基于条件接收装置的视频点播系统。
背景技术
随着人民生活水平的提高，常规的电视播放方式已经不再满足消费者的需求，视频点播（VOD）将成为一种趋势。条件接收装置（CAM）是用来控制用户收看经过授权的数字电视节目（含音频、视频、数据等）的一种卡，通过条件接收装置可让数字电视运营商在电视系统中对用户进行授权控制及授权管理，从而实现数字电视节目的有偿服务。条件接收装置在欧洲市场广泛使用，国内市场也在日益发展。如果在基于条件接收装置的数字电视接收系统中增加VOD功能，必定受到运营商及用户的欢迎。目前的条件接收装置还没有实现VOD功能。
发明内容
本发明的主要目的是提供一种基于条件接收装置的视频点播系统，能够通过条件接收装置实现VOD功能。
本发明解决其技术问题所采用的技术方案是：
一种基于条件接收装置的视频点播系统，其包括：
VOD服务器、主机（带CI接口的电视机或机顶盒）和条件接收装置，所述VOD服务器通信连接所述主机，所述条件接收装置通信连接所述主机，其中：
所述主机上设置有DVB应用及解码器、图形输出模块、人机交互模块、IP模块和第一通信交互模块，所述条件接收装置上设置有第二通信交互模块、VOD处理模块和CA（Conditional Access，条件接收）核心模块，所述第二通信交互模块与所述第一通信交互模块连接，所述第一通信交互模块与所述IP模块通信连接，所述第二通信交互模块还与所述VOD处理模块通信连接，所述VOD处理模块与所述人机交互模块连接，所述人机交互模块与所述图形输出模块通信连接，所述DVB应用及解码器与所述CA核心模块通信连接，所述DVB应用及解码器与所述图形输出模块连接。
所述条件接收装置和所述主机上分别设置有CI（Common Interface，通用接口）接口，所述条件接收装置的第二通信交互模块通过所述CI接口与主机的所述第一通信交互模块通信连接，所述VOD处理模块与所述人机交互模块通过所述CI接口通信连接，所述DVB应用及解码器与所述CA核心模块通过所述CI接口通信连接。
本发明还提供一种基于条件接收装置的视频点播的方法，应用于上述系统，该方法包括步骤：
S1、用户进入主机的VOD模式，主机通过人机交互模块发送指令给条件接收装置的VOD处理模块，条件接收装置的处理模块接收到指令后，将用户信息和相应的数据通过第二通信交互模块发送给主机的第一通信交互模块，主机的第一通信交互模块接收到所述用户信息和相应的数据后通过IP模块传送给VOD服务器；
S2、VOD服务器根据用户信息，查询数据库中的用户信息表，验证用户身份，如果用户身份合法，则进入下列步骤S3，否则通过与步骤S1中的通道相反的方向给条件接收装置的VOD处理模块返回认证失败信息；
S3、通过用户认证后，VOD服务器经IP网络向主机的IP模块发送节目列表和用户信息，主机的IP模块接收到节目列表和用户信息经第一通信交互模块发送给条件接收装置的第二通信交互模块，条件接收装置的第二通信交互模块再通过VOD处理模块把所述节目列表和用户信息回传给主机的人机交互模块，人机交互模块再将所述节目列表和用户信息发送给图形输出模块进行显示；
S4、用户根据主机显示在图形输出模块上的节目列表和用户信息进行浏览选择，选定一个节目后，通过遥控器向人机交互模块发送控制指令，该人机交互模块将该控制指令给条件接收装置的VOD处理模块，条件接收装置的VOD处理模块将所述节目列表和用户信息组包后经第二通信交互模块、第一通信交互模块和IP模块发送给VOD服务器，VOD服务器根据接收到的节目列表和用户信息查找对应的节目，然后返回具体的收视参数和确认数据发送给条件接收装置的VOD处理模块，条件接收装置的VOD处理模块再把所述确认参数中的部分数据返回给主机；
S5、用户按下播放按钮，通过人机交互模块发送指令给条件接收装置的VOD处理模块，条件接收装置的VOD处理模块将该指令组包后利用通信协议经第二通信交互模块、第一通信交互模块和IP模块发送给VOD服务器，VOD服务器根据接收到的该组包后的指令，通过数字电视线缆/卫星/地面传输等方式向主机发送点播的节目流，节目流经主机的DVB应用及解码器解码后发给条件接收装置的CA核心模块进行处理，最后条件接收装置的CA核心模块再把处理后的节目流回传给DVB应用及解码器后再发送到图形输出模块上进行显示，使用户能够正常收看视频。
优选地，所述步骤S5之后，还包括：
S6、用户在正常收看视频过程中可进行暂停或退出操作命令，人机交互模块接收到该操作命令后通过条件接收装置的VOD处理模块把该操作命令经主机的IP模块发送给VOD服务器，VOD服务器根据该操作指令进行暂停或退出处理。
本发明还提供一种条件接收装置，包括：第二通信交互模块、VOD处理模块和CA核心模块，所述第二通信交互模块连接所述VOD处理模块，所述VOD处理模块用于与主机的人机交互模块通信连接。实施本发明的技术方案，具有以下有益效果：本发明提供的基于条件接收装置的视频点播系统中，条件接收装置与主机进行通信交互，并通过主机的IP模块与VOD服务器进行交互，能够通过条件接收装置实现VOD功能。
附图说明
图1为本发明实施例提供的基于条件接收装置的视频点播系统结构示意图；
图2为本发明实施例提供的条件接收装置的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。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。
本发明实施例提供一种基于条件接收装置的视频点播系统，如图1所示，该系统包括：
VOD服务器110、主机120（带CI接口的电视机或机顶盒）和条件接收装置130，所述VOD服务器通信连接所述主机120，所述主机120与条件接收装置130通信连接。
在本实施例中，所述主机120包括有DVB应用及解码器121、图形输出模块125、人机交互模块124、IP模块122和第一通信交互模块123，所述条件接收装置上设置有第二通信交互模块133、VOD处理模块132和CA核心模块131，其中：
所述第二通信交互模块133与所述第一通信交互模块123通信连接，所述第一通信交互模块123与所述IP模块122通信连接，所述第二通信交互模块133还与所述VOD处理模块132通信连接，所述VOD处理模块132与所述人机交互模块124通信连接，所述人机交互模块124与所述图形输出模块125通信连接，所述DVB应用及解码器121与所述CA核心模块131通信连接，所述DVB应用及解码器121与所述图形输出模块125连接。
在上述实施例中，所述条件接收装置130和所述主机120上分别设置有CI接口，所述条件接收装置130的第二通信交互模块133通过所述CI接口与主机120的所述第一通信交互模块123通信连接，所述VOD处理模块132与所述人机交互模块124通过所述CI接口通信连接，所述DVB应用及解码器121与所述CA核心模块131通过所述CI接口通信连接。在上述实施例中，用户进行上述系统进行VOD点播的流程如下列步骤：
S1、用户进入主机120的VOD模式，主机120通过人机交互模块124发送指令给条件接收装置130的VOD处理模块132，条件接收装置的VOD处理模块132接收到指令后，将用户信息和相应的数据通过第二通信交互模块133发送给主机120的第一通信交互模块123，主机120的第一通信交互模块123接收到所述用户信息和相应的数据后通过IP模块122传送给VOD服务器110（也成为：VOD前端）。
S2、VOD服务器110根据用户信息，查询数据库中的用户信息表，验证用户身份，如果用户身份合法，则进入下列步骤S3，否则通过与步骤S1中的通道相反的方向给条件接收装置130的VOD处理模块132返回认证失败信息。
S3、通过用户认证后，VOD服务器110经IP网络向主机120的IP模块122发送节目列表和其它信息（包括图片、费用等数据），主机120的IP模块122接收到节目列表和其它信息经第一通信交互模块123发送给条件接收装置130的第二通信交互模块133，条件接收装置130的第二通信交互模块133再通过VOD处理模块132把这些节目列表和其它信息回传给主机120的人机交互模块124，人机交互模块再发送给图形输出模块125进行显示。
S4、用户根据主机120显示在图形输出模块125上的节目列表和其它信息进行浏览选择，选定一个节目后，通过遥控器向人机交互模块124发送控制指令，该人机交互模块124将该控制指令给条件接收装置130的VOD处理模块132，条件接收装置130的VOD处理模块132组包后经第二通信交互模块133、第一通信交互模块123和IP模块122发送给VOD服务器110，VOD服务器110根据接收到的节目列表和其它信息查找对应的节目，然后返回具体的收视参数（例如service ID（服务标识）等）和其它确认数据（沿上述将VOD处理模块132发送信息和数据到VOD服务器110相反的路径）发送给条件接收装置130的VOD处理模块132，条件接收装置130的VOD处理模块132再把其中的部分数据（如：收视参数）返回给主机120。
S5、用户按下播放按钮，通过人机交互模块124发送相应指令给条件接收装置的VOD处理模块132，条件接收装置的VOD处理模块132组包后利用通信协议经第二通信交互模块133、第一通信交互模块123和IP模块122发送给VOD服务器110，VOD服务器110根据接收到的该数据，通过数字电视线缆/卫星/地面传输等方式向主机120发送点播的节目流，节目流经主机120的DVB应用及解码器121解码后发给条件接收装置130的CA核心模块131进行处理，最后条件接收装置130的CA核心模块131再把处理后的节目流回传给DVB应用及解码器121后再发送到图形输出模块125上进行显示，使用户能够正常收看视频。
S6、用户在正常收看视频过程中可进行暂停或退出操作命令，人机交互模块123接收到该操作命令后通过条件接收装置130的VOD处理模块132会把该操作命令经主机120的IP模块122（过程跟上述步骤中的命令或者数据发送过程一样）发送给VOD服务器110，VOD服务器110根据该操作指令进行相应的处理。
上述实施例提供的基于条件接收装置的视频点播系统，条件接收装置与主机进行通信交互，并通过主机上的IP模块与VOD服务器进行交互，能够通过条件接收装置实现VOD功能。
另外，本发明实施例还提供一种条件接收装置，如图2所示，该条件接收装置130包括：第二通信交互模块133、VOD处理模块132和CA核心模块131，所述第二通信交互模块133连接所述VOD处理模块132。
该实施例提供的条件接收装置，与主机进行通信交互，并通过主机上的IP模块与VOD服务器进行交互通信，能够实现VOD功能。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (5)

  1. 一种基于条件接收装置的视频点播系统，其特征在于，包括：
    VOD服务器、主机和条件接收装置，所述VOD服务器通信连接所述主机，所述条件接收装置通信连接所述主机，其中：
    所述主机上设置有DVB应用及解码器、图形输出模块、人机交互模块、IP模块和第一通信交互模块，所述条件接收装置上设置有第二通信交互模块、VOD处理模块和CA核心模块，所述第二通信交互模块与所述第一通信交互模块连接，所述第一通信交互模块与所述IP模块通信连接，所述第二通信交互模块还与所述VOD处理模块通信连接，所述VOD处理模块与所述人机交互模块连接，所述人机交互模块与所述图形输出模块通信连接，所述DVB应用及解码器与所述CA核心模块通信连接，所述DVB应用及解码器与所述图形输出模块连接。
  2. 如权利要求1所述基于条件接收装置的视频点播系统，其特征在于，所述条件接收装置和所述主机上分别设置有CI接口，所述条件接收装置的第二通信交互模块通过所述CI接口与主机的所述第一通信交互模块通信连接，所述VOD处理模块与所述人机交互模块通过所述CI接口通信连接，所述DVB应用及解码器与所述CA核心模块通过所述CI接口通信连接。
  3. 一种基于条件接收装置的视频点播的方法，应用于权利要求1所述的系统，其特征在于，该方法包括步骤：
    S1、用户进入主机的VOD模式，主机通过人机交互模块发送指令给条件接收装置的VOD处理模块，条件接收装置的处理模块接收到指令后，将用户信息和相应的数据通过第二通信交互模块发送给主机的第一通信交互模块，主机的第一通信交互模块接收到所述用户信息和相应的数据后通过IP模块传送给VOD服务器；
    S2、VOD服务器根据用户信息，查询数据库中的用户信息表，验证用户身份，如果用户身份合法，则进入下列步骤S3，否则通过与步骤S1中的通道相反的方向给条件接收装置的VOD处理模块返回认证失败信息；
    S3、通过用户认证后，VOD服务器经IP网络向主机的IP模块发送节目列表和用户信息，主机的IP模块接收到节目列表和用户信息经第一通信交互模块发送给条件接收装置的第二通信交互模块，条件接收装置的第二通信交互模块再通过VOD处理模块把所述节目列表和用户信息回传给主机的人机交互模块，人机交互模块再将所述节目列表和用户信息发送给图形输出模块进行显示；
    S4、用户根据主机显示在图形输出模块上的节目列表和用户信息进行浏览选择，选定一个节目后，通过遥控器向人机交互模块发送控制指令，该人机交互模块将该控制指令给条件接收装置的VOD处理模块，条件接收装置的VOD处理模块将所述节目列表和用户信息组包后经第二通信交互模块、第一通信交互模块和IP模块发送给VOD服务器，VOD服务器根据接收到的节目列表和用户信息查找对应的节目，然后返回具体的收视参数和确认数据发送给条件接收装置的VOD处理模块，条件接收装置的VOD处理模块再把所述确认参数中的部分数据返回给主机；
    S5、用户按下播放按钮，通过人机交互模块发送指令给条件接收装置的VOD处理模块，条件接收装置的VOD处理模块将该指令组包后利用通信协议经第二通信交互模块、第一通信交互模块和IP模块发送给VOD服务器，VOD服务器根据接收到的该组包后的指令，通过数字电视线缆/卫星/地面传输等方式向主机发送点播的节目流，节目流经主机的DVB应用及解码器解码后发给条件接收装置的CA核心模块进行处理，最后条件接收装置的CA核心模块再把处理后的节目流回传给DVB应用及解码器后再发送到图形输出模块上进行显示，使用户能够正常收看视频。
  4. 如权利要求3所述的方法，其特征在于，所述步骤S5之后，还包括：
    S6、用户在正常收看视频过程中可进行暂停或退出操作命令，人机交互模块接收到该操作命令后通过条件接收装置的VOD处理模块把该操作命令经主机的IP模块发送给VOD服务器，VOD服务器根据该操作指令进行暂停或退出处理。
  5. 一种条件接收装置，其特征在于，包括：第二通信交互模块、VOD处理模块和CA核心模块，所述第二通信交互模块连接所述VOD处理模块，所述VOD处理模块用于与主机的人机交互模块通信连接。
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