WO2012031423A1 - 无线数据卡及通过无线数据卡实现电视节目播放的方法 - Google Patents

无线数据卡及通过无线数据卡实现电视节目播放的方法 Download PDF

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Publication number
WO2012031423A1
WO2012031423A1 PCT/CN2010/078519 CN2010078519W WO2012031423A1 WO 2012031423 A1 WO2012031423 A1 WO 2012031423A1 CN 2010078519 W CN2010078519 W CN 2010078519W WO 2012031423 A1 WO2012031423 A1 WO 2012031423A1
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Prior art keywords
wireless data
data card
computer
program
television program
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PCT/CN2010/078519
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English (en)
French (fr)
Inventor
吕永
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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 BR112013005509-0A priority Critical patent/BR112013005509B1/pt
Priority to JP2013511510A priority patent/JP5468179B2/ja
Priority to EP10856885.8A priority patent/EP2615844A4/en
Publication of WO2012031423A1 publication Critical patent/WO2012031423A1/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
    • 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
    • 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
    • H04L65/75—Media network packet handling
    • H04L65/765—Media network packet handling intermediate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • 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
    • H04N21/482—End-user interface for program selection

Definitions

  • Wireless data card and method for realizing television program broadcast by wireless data card
  • the present invention relates to digital television broadcasting technology, and more particularly to a wireless data card and a method for realizing television program broadcasting through a wireless data card. Background technique
  • PCMCIA Personal Computer Memory Card International Association
  • USB Universal Serial Bus
  • PCI Peripheral Component Expansion Interface
  • the wireless data card includes two types of an internet card and a television card; wherein, the network card has a wireless communication function, such as WCDMA (Wideband Code Division Multiple Access), TDSCDMA (Time Division Synchronous Code Division Multiple Access), CDMA (code division) A multi-access system or an EDGE (Enhanced Data Rate GSM Evolution) system network card, etc., enables a computer connected thereto to access a wireless communication network; and a television card can receive a wireless broadcast signal, enabling a computer connected thereto to receive And play TV shows.
  • some wireless data cards have both a network card and a TV card function, and can access both a wireless communication network and a wireless broadcast signal. Such a wireless data card is usually called a TV cat.
  • TV services deployed on TV cards or TV cats are usually targeted at digital TV standards such as China's CMMB (China Mobile Multimedia Broadcasting), Europe's DVB-H, DVB-T (DVB, Digital Video Broadcasting), and Japan. ISDB-T (ISDB, Integrated Services Digital Broadcasting), etc.
  • Television data in broadcast signals transmitted by such digital television services typically consists of two parts: audio and video data and program information (EPG/ESG).
  • the usual solution is to receive the broadcast signal first on the TV card or the TV cat side, and then do little processing, such as packaging the TV data in the broadcast signal into a format that can be sent to the computer, Or filter some data that the user does not consume, and then transfer it to the computer for processing; the computer side needs to develop a client.
  • the client is responsible for parsing the television data, presenting the program information to the user, and then playing the audio and video data of the corresponding program through the streaming media player according to the program selected by the user.
  • the transaction on the computer side is more complicated, and because the operating system on the computer is very different, in order to support different operating systems, the workload of the client is increased. Summary of the invention
  • the main object of the present invention is to provide a wireless data card and a method for realizing television program broadcasting by using a wireless data card, which can reduce the porting work of the client due to different computer operating systems.
  • a wireless data card including an information transceiver controller, a web server, and a streaming media server;
  • the information transceiving controller is configured to receive and parse the television broadcast signal to obtain program information, and convert the program information into a program list in the form of an HTML page and publish the program list to the web server; and further set the television program selection notification according to the web server. Parsing audio and video data of the corresponding television program from the television broadcast signal and forwarding the data to the streaming media server;
  • a web server configured to: when the computer connected to the wireless data card accesses itself, send the program list in the form of the HTML page to the web browser of the computer for the user to select the television program; and set the receiving computer to be selected according to the user
  • the television program selection notification sent by the television program is forwarded to the information transceiving controller;
  • the streaming media server is configured to encapsulate the audio and video data sent by the information transceiving controller into an RTP/RTCP format and then send the data to the computer for playing.
  • the wireless data card further includes a data splitter configured to determine whether the computer is accessing the web server according to whether the destination IP address accessed by the computer is a preset IP address when the computer accesses the wireless data card.
  • the HTML page further includes playing parameters and transmission parameters of the audio and video data.
  • the streaming server sends audio and video data in a broadcast or multicast manner.
  • a method for realizing television program broadcast by a wireless data card comprising:
  • the wireless data card receives and parses the television broadcast signal to obtain program information, and converts the program information into a program list in the form of an HTML page;
  • the computer connected to the wireless data card accesses the wireless data card to obtain a program list in the form of an HTML page for the user to select a television program, and the computer transmits a television program selection notification to the wireless data card according to the television program selected by the user;
  • the wireless data card parses the audio and video data of the corresponding television program from the television broadcast signal and encapsulates it into an RTP/RTCP format and sends it to the computer;
  • the computer receives and plays the audio and video data of the corresponding television program.
  • the computer connected to the wireless data card accesses the wireless data card to obtain a list of programs in the form of an HTML page:
  • the wireless data card determines whether to send a program list in the form of an HTML page to the computer according to whether the destination IP address when the computer accesses itself is a preset IP address.
  • the HTML page further includes playing parameters and transmission parameters of the audio and video data.
  • the wireless data card transmits audio and video data in a broadcast or multicast manner.
  • the wireless data card of the present invention converts the program information in the television broadcast signal into an HTML page for display by a web browser on the computer; and encapsulates the audio and video data in the television broadcast signal into an RTP/RTCP format. After being sent to the computer for playback by the streaming media player on the computer; making full use of the existing web page browsing function and streaming media playing function on the computer, simplifying the development of the client on the computer, and reducing the difference caused by the computer operating system The client's porting work.
  • the existing wireless data card not only has a wireless communication function, but also has a function of realizing the playback of the digital television service.
  • FIG. 1 is a schematic diagram showing the internal structure of a wireless data card according to the present invention.
  • FIG. 2 is a schematic flow chart of realizing digital television program playing by the wireless data card of the present invention. detailed description
  • the basic idea of the present invention is: Since existing computers generally have a Web browser function, and the Web browser generally supports the display of an HTML (Hypertext Markup Language) page embedded with the streaming media player, the present invention By converting the TV data on the wireless data card side into a format that can be displayed by the web browser and the streaming media player on the computer, the user can watch the digital television program through the web browser, thereby simplifying the development of the client on the computer and reducing the The porting of the client brought by the different computer operating systems.
  • HTML Hypertext Markup Language
  • the wireless data card of the present invention mainly includes: an information transceiving controller, a web server, and a streaming media server;
  • the information transceiving controller is configured to receive and parse the television broadcast signal to obtain a program letter, a package, (EPG/ESG), convert the program information into a program list in the form of an HTML page, and publish the program list to the web server;
  • the television program selection notification is sent, and the audio and video data of the corresponding television program is parsed from the television broadcast signal and forwarded to the streaming media server;
  • a web server also referred to as a directory server, is configured to send a list of programs in the form of an HTML page to a web browser of the computer when the calculation connected to the wireless data card accesses itself through a preset IP address and port number
  • the user is selected to select a television program; and is further configured to receive a television program selection notification sent by the computer according to the television program selected by the user, and forward the information to the information transceiver controller;
  • the streaming media server is configured to encapsulate the audio and video data sent by the information transceiving controller into an RTP/RTCP format and then send the data to the computer for playing.
  • the wireless data card further includes a data splitter configured to determine whether the computer is accessing the web server according to whether the destination IP address accessed by the computer is a preset IP address when the computer accesses the wireless data card.
  • the method for implementing digital television service playback by the wireless data card of the present invention includes the following steps:
  • Step 201 The wireless data card receives and parses the television broadcast signal to obtain program information, and converts the program information into a program list in the form of an HTML page.
  • the HTML page further includes playing parameters and transmission parameters of the audio and video data.
  • Step 202 The computer connected to the wireless data card accesses the wireless data card to obtain a program list in the form of an HTML page for the user to select a television program, and according to the television program selected by the user, the computer sends a television program selection notification to the wireless data card;
  • the computer connected to the wireless data card accesses the wireless data card to obtain a list of programs in the form of an HTML page:
  • the wireless data card determines whether to send a program list in the form of an HTML page to the computer according to whether the destination IP address when the computer accesses itself is a preset IP address.
  • Step 203 According to the received television program selection notification, the wireless data card parses the audio and video data of the corresponding television program from the television broadcast signal and encapsulates the data into an RTP/RTCP format and sends the data to the computer.
  • audio and video data is transmitted in a broadcast or multicast manner.
  • Step 204 The computer receives and plays audio and video data of the corresponding television program.
  • the technical solution of the present invention will be further described in detail below through a specific embodiment.
  • the method for implementing CMMB television service playback by the wireless data card of the present invention comprises the following steps:
  • Step 301 The information transceiving controller receives and parses the CMMB signal to obtain program information (EPG/ESG), organizes the program information into a program list, and uses an HTML page form. Publish to the web server.
  • EPG/ESG program information
  • HTML page form Publish to the web server.
  • the HTML page of the program list also includes playing parameters and transmission parameters of the audio and video data of the channel, so that the computer can obtain the transmission parameters and the playing parameters by accessing the HTML page, so that the computer can correctly follow the transmission parameters and the playing parameters. Receive and play audio and video data.
  • the playing parameters of the audio and video data are included in the audio and video data, including the audio format, the video format, the audio and video sampling rate, and the timestamp information; the transmission parameter of the audio and video data is configured by the information transceiving controller, Video data is generally encapsulated in the format of RTP/RTCP (Real-Time Transport Protocol/Real-Time Transport Control Protocol) over IP, so the transmission parameters include IP, User Datagram Protocol (UDP), RTP, and RTCP. These playback parameters are generally described in the form of SDP (Session Description Protocol) files.
  • Step 302 The computer connected to the wireless data card accesses the web server embedded in the wireless data card by using a preset IP address and port number, and obtains a program list in the form of the HTML page and displays it on the web browser for the user to select. TV show.
  • the computer and the wireless data card can be connected by a USB (Universal Serial Bus) interface.
  • the web browser of the computer issues an IP packet whose destination address is X and the destination port number is Y, and the IP packet sequentially passes through the TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack of the computer side and The driver, as well as the driver on the wireless data card side, arrives at the data splitter inside the wireless data card.
  • the data splitter determines whether the destination IP address of the received IP packet is a preset IP address. If not, the IP packet is sent to the wireless protocol stack in the wireless data card, and then sent to the wireless protocol stack. An external wireless communication network; otherwise, the IP packet is sent to the TCP/IP protocol stack on the wireless data card side, and then sent to the Web server by the TCP/IP protocol stack on the wireless data card side.
  • the web server After receiving the IP packet, the web server encapsulates the program list in the form of an HTML page into an IP packet and sends the packet to the computer via the following path: Web server ⁇ Wireless data card side TCP/IP protocol stack ⁇ data splitter ⁇ driver on the wireless data card side ⁇ driver on the computer side ⁇ TCP/IP stack on the computer side ⁇ web browser.
  • the data splitter finds that the source destination address and the port number of the IP packet are the preset destination address and port number, and sends the IP packet to the IP packet.
  • the TCP/IP protocol stack on the computer side of the computer side of the TCP/IP protocol stack on the computer side of the driver data splitter on the wireless data card side of the driver wireless data card side of the TCP / IP protocol stack Web server this two-way channel, A web browser on the computer can access and display the content on the web server.
  • Step 303 The user clicks CCTV1 on the HTML page, selects "Play", and correspondingly, the computer sends a TV program selection notification to the Web server through the channel described in step 302.
  • Step 304 According to the received television program selection notification, if the CCTV1 has not been broadcasted, the Web server notifies the information transceiving controller to parse the audio and video data of the CCTV1 from the CMMB signal and forward it to the streaming media server.
  • CCTV1 is being broadcast, the current processing flow is ended. Whether CCTV1 is being broadcast can be known by the web server comparing the currently received TV program selection notification with the last received TV program selection notification.
  • Step 305 The streaming media server encapsulates the received audio and video data of the CCTV1 into an RTP/RTCP format and sends the data to the computer.
  • the streaming media server sends the audio and video data of the CCTV1 to the computer in a broadcast or multicast manner according to the transmission parameters described in the foregoing SDP file, and the path of the audio and video data of the CCTV1 is: the streaming media server ⁇ the wireless data card side. TCP/IP protocol stack ⁇ data splitter ⁇ driver on the wireless data card side ⁇ driver on the computer side ⁇ TCP/IP protocol stack on the computer side ⁇ streaming media player.
  • Step 306 The streaming media player embedded in the web browser on the computer receives the audio and video data of the CCTV 1 according to the transmission parameters acquired from the HTML page, and plays the audio and video data of the CCTV 1 according to the playing parameters obtained from the HTML page.
  • the present invention has the following two advantages: 1. Maximally applies the technology supported by the current computer, so there is no need to make excessive improvements to the computer, and the cost is relatively low; Therefore, it is possible to develop and customize a user interface (UI) program simply and quickly.
  • UI user interface

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

Abstract

本发明公开了一种无线数据卡及通过无线数据卡实现电视节目播放的方法。该无线数据卡包括：信息收发控制器，设置为接收并解析电视广播信号得到节目信息，将节目信息转换为HTML页面形式的节目清单发布到Web服务器上；还根据电视节目选择通知，从电视广播信号中解析出相应电视节目的音视频数据并转发给流媒体服务器；Web服务器，设置为当与无线数据卡相连的计算机访问自身时，将HTML页面形式的节目清单发送到计算机的Web浏览器上供用户选择电视节目；还接收计算机根据用户选择的电视节目发来的电视节目选择通知并转发给信息收发控制器；流媒体服务器，设置为将音视频数据封装成RTP/RTCP格式后发送给计算机进行播放。

Description

无线数据卡及通过无线数据卡实现电视节目播放的方法 技术领域
本发明涉及数字电视播放技术， 尤其涉及一种无线数据卡及通过无线 数据卡实现电视节目播放的方法。 背景技术
现有的无线数据卡应用十分广泛， 其一般通过 PCMCIA (个人计算机 存储卡国际协会）接口、 USB (通用串行总线）接口或 PCI (周边元件扩展 接口） 与计算机相连。 无线数据卡包括上网卡和电视卡两种； 其中， 上网 卡具有无线通信功能， 如 WCDMA (宽带码分多址）制式的、 TDSCDMA (时分同步的码分多址）制式的、 CDMA (码分多址）制式的或 EDGE (增 强型数据速率 GSM演进技术 )制式的上网卡等， 能使与其相连的计算机接 入无线通信网络； 而电视卡可以接收无线广播信号， 能使与其相连的计算 机接收和播放电视节目。 此外， 有的无线数据卡兼具上网卡和电视卡两种 功能， 既能接入无线通信网络， 也能接收无线广播信号， 这种无线数据卡 通常称为电视猫。
在电视卡或电视猫上部署的电视业务通常都是针对数字电视标准， 如 中国的 CMMB (中国移动多媒体广播 ) , 欧洲的 DVB-H、 DVB-T ( DVB, 数字视频广播） ， 以及日本的 ISDB-T ( ISDB, 综合业务数字广播）等。 这 类数字电视业务传输的广播信号中的电视数据通常包含两个部分： 音视频 数据和节目信息 （EPG/ESG ) 。 在实现这类数字电视业务的播放时， 通常 的方案是电视卡或电视猫侧先接收广播信号， 再做很少的处理， 如将广播 信号中的电视数据封装成可以发送给计算机的格式、 或者过滤一部分用户 不消费的数据， 之后再传输给计算机处理； 计算机侧则需开发一个客户端， 该客户端负责解析电视数据， 将其中的节目信息展现给用户， 再根据用户 选择的节目， 将相应节目的音视频数据通过流媒体播放器播放。 上述方案 中， 计算机侧的客户端负责处理的事务比较复杂， 且由于计算机上的操作 系统千差万别， 为了支持不同的操作系统， 会加大客户端的移植工作量。 发明内容
有鉴于此， 本发明的主要目的在于提供一种无线数据卡及通过无线数 据卡实现电视节目播放的方法， 能够减少由于计算机操作系统不同带来的 客户端的移植工作。
为达到上述目的， 本发明的技术方案是这样实现的：
一种无线数据卡， 包括信息收发控制器、 Web服务器和流媒体服务器； 其中，
信息收发控制器， 设置为接收并解析电视广播信号得到节目信息， 将所述节目信息转换为 HTML页面形式的节目清单发布到 Web服务器 上； 还设置为根据 Web服务器发来的电视节目选择通知， 从电视广播信 号中解析出相应电视节目的音视频数据并转发给流媒体服务器；
Web服务器， 设置为当与无线数据卡相连的计算机访问自身时， 将 所述 HTML页面形式的节目清单发送到该计算机的 Web浏览器上供用 户选择电视节目； 还设置为接收计算机根据用户选择的电视节目发来的 电视节目选择通知并转发给信息收发控制器；
流媒体服务器， 设置为将信息收发控制器发来的音视频数据封装成 RTP/RTCP格式后发送给计算机进行播放。
所述无线数据卡还包括数据分路器， 设置为当计算机访问无线数据 卡时， 根据计算机访问的目的 IP地址是否是预设的 IP地址， 确定计算 机是否是访问 Web服务器。
所述 HTML页面中还包含有音视频数据的播放参数和传输参数。 所述流媒体服务器以广播或组播的方式发送音视频数据。 一种通过无线数据卡实现电视节目播放的方法， 包括：
无线数据卡接收并解析电视广播信号得到节目信息， 将所述节目信 息转换为 HTML页面形式的节目清单；
与无线数据卡相连的计算机访问无线数据卡获得 HTML页面形式的 节目清单供用户选择电视节目， 根据用户选择的电视节目， 计算机向无 线数据卡发送电视节目选择通知；
根据收到的电视节目选择通知， 无线数据卡从电视广播信号中解析 出相应电视节目的音视频数据并封装成 RTP/RTCP 格式后发送给计算 机；
计算机接收并播放相应电视节目的音视频数据。
所述与无线数据卡相连的计算机访问无线数据卡获得 HTML页面形 式的节目清单为：
无线数据卡根据计算机访问自身时的目的 IP地址是否是预设的 IP 地址， 确定是否向计算机发送 HTML页面形式的节目清单。
所述 HTML页面中还包含有音视频数据的播放参数和传输参数。 所述无线数据卡以广播或组播的方式发送音视频数据。
由以上技术方案可以看出， 本发明的无线数据卡将电视广播信号中的 节目信息转换 HTML页面， 供计算机上的 Web浏览器展示； 将电视广播信 号中的音视频数据封装成 RTP/RTCP格式后发送给计算机， 供计算机上的 流媒体播放器进行播放； 充分利用计算机上已有的 Web网页浏览功能和流 媒体播放功能， 简化计算机上客户端的开发工作， 并减少由于计算机操作 系统不同带来的客户端的移植工作。 另外， 釆用本发明的技术方案， 使现 有无线数据卡不仅具有无线通信功能， 还具有实现数字电视业务播放的功 能。 附图说明
图 1为本发明无线数据卡的内部结构示意图；
图 2为通过本发明的无线数据卡实现数字电视节目播放的流程示意图。 具体实施方式
本发明的基本思想是： 由于现有的计算机一般都具有 Web浏览器功 能， 且 Web浏览器一般都支持内嵌流媒体播放器的 HTML (超文本链接 标示语言） 页面的展示， 因此， 本发明在无线数据卡侧将电视数据转换 成计算机上的 Web浏览器和流媒体播放器能够展示的格式，则用户可以 通过 Web浏览器收看数字电视节目，从而简化计算机上客户端的开发工 作， 并减少由于计算机操作系统不同带来的客户端的移植工作。
下面结合附图对本发明的技术方案做详细说明。
如图 1所示，本发明的无线数据卡主要包括：信息收发控制器、 Web 服务器和流媒体服务器； 其中，
信息收发控制器， 设置为接收并解析电视广播信号得到节目信,包、 ( EPG/ESG ) , 将该节目信息转换为 HTML页面形式的节目清单发布到 Web服务器上； 还用于根据 Web服务器发来的电视节目选择通知，从电 视广播信号中解析出相应电视节目的音视频数据并转发给流媒体服务 器；
Web服务器， 也可称为目录服务器， 设置为当与无线数据卡相连的 计算通过预设的 IP地址和端口号访问自身时， 将所述 HTML页面形式 的节目清单发送到该计算机的 Web浏览器上供用户选择电视节目；还用 于接收计算机根据用户选择的电视节目发来的电视节目选择通知并转发 给信息收发控制器；
流媒体服务器， 设置为将信息收发控制器发来的音视频数据封装成 RTP/RTCP格式后发送给计算机进行播放。 该无线数据卡还包括数据分路器， 设置为当计算机访问无线数据卡 时， 根据计算机访问的目的 IP地址是否是预设的 IP地址， 确定计算机 是否是访问 Web服务器。
如图 2所示， 通过本发明的无线数据卡实现数字电视业务播放的方 法包括以下步骤：
步骤 201 , 无线数据卡接收并解析电视广播信号得到节目信息， 将 所述节目信息转换为 HTML页面形式的节目清单；
所述 HTML页面中还包含有音视频数据的播放参数和传输参数。 步骤 202 , 与无线数据卡相连的计算机访问无线数据卡获得 HTML 页面形式的节目清单供用户选择电视节目， 根据用户选择的电视节目， 计算机向无线数据卡发送电视节目选择通知；
所述与无线数据卡相连的计算机访问无线数据卡获得 HTML页面形 式的节目清单为：
无线数据卡根据计算机访问自身时的目的 IP地址是否是预设的 IP 地址， 确定是否向计算机发送 HTML页面形式的节目清单。
步骤 203 , 根据收到的电视节目选择通知， 无线数据卡从电视广播 信号中解析出相应电视节目的音视频数据并封装成 RTP/RTCP格式后发 送给计算机。
为了控制方便， 以广播或组播的方式发送音视频数据。
步骤 204 , 计算机接收并播放相应电视节目的音视频数据。
下面通过一个具体实施例对本发明的技术方案作进一步详细说明。 通过本发明的无线数据卡实现 CMMB 电视业务播放的方法包括以 下步骤：
步骤 301 , 信息收发控制器接收并解析 CMMB 信号得到节目信息 ( EPG/ESG ) , 将该节目信息整理成节目清单， 并釆用 HTML页面形式 发布到 Web服务器上。
该节目清单的 HTML页面中还包含有频道的音视频数据的播放参数 和传输参数， 以便计算机通过访问该 HTML页面能得到这些传输参数和 播放参数， 从而使计算机按照这些传输参数和播放参数能够正确接收和 播放音视频数据。
其中， 音视频数据的播放参数是音视频数据自带的， 包括音频格式、 视频格式、 音视频釆样率和时间戳信息等； 音视频数据的传输参数是信 息收发控制器配置的， 由于音视频数据一般会封装成 RTP/RTCP (实时 传输协议 /实时传输控制协议） 的格式通过 IP传输， 因此传输参数包括 IP、 用户数据报协议 （UDP ) 、 RTP和 RTCP等。 这些播放参数一般以 SDP (会话描述协议） 文件的方式描述。
步骤 302 , 与无线数据卡相连的计算机通过预设的 IP地址和端口号 访问无线数据卡内嵌的 Web服务器， 得到所述 HTML页面形式的节目 清单并展示在自身的 Web浏览器上供用户选择电视节目。
其中， 计算机与无线数据卡可以以 USB (通用串行总线）接口相连。 计算机的 Web浏览器在访问 Web服务器时， 发出目的地址为 X, 目的端口号为 Y的 IP报文， 该 IP报文依次经过计算机侧的 TCP/IP (传 输控制协议 /互联网协议）协议栈和驱动程序， 以及无线数据卡侧的驱动 程序， 到达无线数据卡内部的数据分路器。 数据分路器判断收到的 IP报 文的目的 IP地址是否是预设的 IP地址， 如果不是， 则将该 IP报文发往 无线数据卡内的无线协议栈，再由无线协议栈发往外部的无线通信网络； 否则， 将该 IP报文发往无线数据卡侧的 TCP/IP协议栈， 再由无线数据 卡侧的 TCP/IP协议栈发往 Web服务器。
Web服务器收到该 IP报文后， 将 HTML页面形式的节目清单封装 成 IP报文经由以下路径发送给计算机： Web服务器→无线数据卡侧的 TCP/IP 协议栈→数据分路器→无线数据卡侧的驱动程序→计算机侧的 驱动程序→计算机侧的 TCP/IP协议栈→Web浏览器。 其中， 在含有节 目清单的 IP报文达到数据分路器时， 数据分路器发现该 IP报文的源目 的地址和端口号是预设的目的地址和端口号时， 将该 IP 文发往计算 机„
由以上描述可知， 通过 Web浏览器 计算机侧的 TCP/IP协议栈 计算机侧的驱动程序 数据分路器 无线数据卡侧的驱动程序 无线数 据卡侧的 TCP/IP协议栈 Web服务器这一双向通道， 计算机上的 Web 浏览器能够访问并展示 Web服务器上的内容。
步骤 303 , 用户点击 HTML页面上的 CCTV1 , 选择 "播放" ， 相应 地，计算机通过步骤 302中所述的通道向 Web服务器发送电视节目选择 通知。
步骤 304 , 根据收到的电视节目选择通知， 如果尚未广播 CCTV1 , 则 Web服务器通知信息收发控制器从 CMMB信号中解析出 CCTV1 的 音视频数据并转发给流媒体服务器。
另外， 如果正在广播 CCTV1 , 则结束当前处理流程。 CCTV1 是否 正在广播可以由 Web 服务器比较当前收到的电视节目选择通知和上一 次收到的电视节目选择通知得知。
步骤 305 , 流媒体服务器将收到的 CCTV1 的音视频数据封装成 RTP/RTCP格式后发送给计算机。
其中， 流媒体服务器按照前述 SDP文件中描述的传输参数以广播或 组播的方式向计算机发送 CCTV1的音视频数据， 且发送 CCTV1的音视 频数据的路径为：流媒体服务器→无线数据卡侧的 TCP/IP协议栈→数据 分路器→无线数据卡侧的驱动程→计算机侧的驱动程序→计算机侧的 TCP/IP协议栈→流媒体播放器。 步骤 306, 计算机上 Web浏览器内嵌的流媒体播放器按照从 HTML 页面获取的传输参数接收 CCTV1的音视频数据， 并按照从 HTML页面 获取的播放参数播放 CCTV1的音视频数据。
根据以上描述可知， 本发明具有以下两个优点： 一、 最大程度地套 用了当前计算机都支持的技术， 因此不需要对计算机进行过多的改进， 成本比较低； 二、 由于釆用了 HTML方式， 因此能够简单且快捷地开发 和定制用户界面 （UI )程序。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种无线数据卡， 其特征在于， 该无线数据卡包括信息收发控制 器、 Web服务器和流媒体服务器； 其中，
信息收发控制器， 设置为接收并解析电视广播信号得到节目信息， 将所述节目信息转换为超文本链接标示语言 HTML页面形式的节目清单 发布到 Web服务器上； 还设置为根据 Web服务器发来的电视节目选择 通知， 从电视广播信号中解析出相应电视节目的音视频数据并转发给流 媒体服务器；
Web服务器， 设置为当与无线数据卡相连的计算机访问自身时， 将 所述 HTML页面形式的节目清单发送到该计算机的 Web浏览器上供用 户选择电视节目； 还设置为接收计算机根据用户选择的电视节目发来的 电视节目选择通知并转发给信息收发控制器；
流媒体服务器， 设置为将信息收发控制器发来的音视频数据封装成 实时传输协议 /实时传输控制协议 RTP/RTCP 格式后发送给计算机进行 播放。
2、 根据权利要求 1所述的无线数据卡， 其特征在于， 所述无线数据 卡还包括数据分路器， 设置为当计算机访问无线数据卡时， 根据计算机 访问的目的互联网协议 IP地址是否是预设的 IP地址， 确定计算机是否 是访问 Web服务器。
3、根据权利要求 1或 2所述的无线数据卡，其特征在于，所述 HTML 页面中还包含有音视频数据的播放参数和传输参数。
4、 根据权利要求 1或 2所述的无线数据卡， 其特征在于， 所述流媒 体服务器以广播或组播的方式发送音视频数据。
5、 一种通过无线数据卡实现电视节目播放的方法， 其特征在于， 该 方法包括： 无线数据卡接收并解析电视广播信号得到节目信息， 将所述节目信 息转换为 HTML页面形式的节目清单；
与无线数据卡相连的计算机访问无线数据卡获得 HTML页面形式的 节目清单供用户选择电视节目， 根据用户选择的电视节目， 计算机向无 线数据卡发送电视节目选择通知；
根据收到的电视节目选择通知， 无线数据卡从电视广播信号中解析 出相应电视节目的音视频数据并封装成 RTP/RTCP 格式后发送给计算 机；
计算机接收并播放相应电视节目的音视频数据。
6、 根据权利要求 5 所述的通过无线数据卡实现电视节目播放的方 法， 其特征在于， 所述与无线数据卡相连的计算机访问无线数据卡获得 HTML页面形式的节目清单为：
无线数据卡根据计算机访问自身时的目的 IP地址是否是预设的 IP 地址， 确定是否向计算机发送 HTML页面形式的节目清单。
7、根据权利要求 5或 6所述的通过无线数据卡实现电视节目播放的 方法， 其特征在于， 所述 HTML页面中还包含有音视频数据的播放参数 和传输参数。
8、 根据权利要求 5或 6所述的通过无线数据卡实现电视节目播放的方 法， 其特征在于， 所述无线数据卡以广播或组播的方式发送音视频数据。
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