WO2012003662A1 - 一种媒体服务器及音视频传输的方法 - Google Patents

一种媒体服务器及音视频传输的方法 Download PDF

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Publication number
WO2012003662A1
WO2012003662A1 PCT/CN2010/076914 CN2010076914W WO2012003662A1 WO 2012003662 A1 WO2012003662 A1 WO 2012003662A1 CN 2010076914 W CN2010076914 W CN 2010076914W WO 2012003662 A1 WO2012003662 A1 WO 2012003662A1
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WIPO (PCT)
Prior art keywords
content
audio
media server
information terminal
information
Prior art date
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PCT/CN2010/076914
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English (en)
French (fr)
Inventor
吕永
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
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 EP10854321.6A priority Critical patent/EP2525530A4/en
Priority to AU2010357082A priority patent/AU2010357082B2/en
Priority to JP2012554195A priority patent/JP2013520884A/ja
Priority to BR112012020577A priority patent/BR112012020577A2/pt
Priority to US13/579,795 priority patent/US20120311187A1/en
Publication of WO2012003662A1 publication Critical patent/WO2012003662A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/436Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43615Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/612Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/65Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/75Media network packet handling
    • H04L65/765Media network packet handling intermediate
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/436Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]

Definitions

  • the present invention relates to a triple play technology, and more particularly to a media server and a method for audio and video transmission. Background technique
  • wireless broadcasting technologies include terrestrial digital TV broadcasting standards such as DVB-T (DVB, Digital Video Broadcasting) and ISDB-T (ISDB, Integrated Services Digital Broadcasting), and mobile digital TV broadcasting standards such as DVB-H and China Mobile Multimedia Broadcasting. (CMMB).
  • DVB-T Digital Video Broadcasting
  • ISDB-T ISDB, Integrated Services Digital Broadcasting
  • CMMB mobile digital TV broadcasting standards
  • DVB-T transmission in broadcast television networks mainly uses the standard of transport stream (TS), while audio and video content on the Internet is mainly downloaded progressively through hypertext transfer protocol. (HTTP Progressive Download) technology transfer.
  • TS transport stream
  • HTTP Progressive Download hypertext transfer protocol
  • information terminals have become differentiated.
  • the technology of broadcast television networks is well supported on television, IPTV is mainly supported by set-top boxes, and the Internet is well supported on mobile phones and PCs. This causes ordinary users to be restricted by the device when accessing content in a home environment and cannot access the content "seamlessly”.
  • the main object of the present invention is to provide a media server and a method for transmitting audio and video, which can facilitate users to access content provided by each content network.
  • a media server connected to the content network, and connected to the information terminal in a WiFi manner, where the media server includes an information transceiver controller and a web server;
  • the information transceiver controller is configured to receive the content sent by the content network, convert the audio and video data in the content into a real-time transport protocol/real-time transport control protocol (RTP/RTCP) encapsulation format, and transmit the information to the information terminal, and further
  • the content forms a content directory in a Hypertext Link Markup Language (HTML) format;
  • the web server is configured to publish a content directory in an HTML format formed by the information transceiving controller and is accessed by the information terminal.
  • the content directory further includes playing parameters and transmission parameters of the audio and video data.
  • the web server is further configured to receive a control command of the selected content sent by the information terminal after accessing the content directory, and forward the control command to the information transceiving controller; the information transceiving controller is further configured to The control command for selecting the content converts the audio and video data in the corresponding content into an RTP/RTCP encapsulation format and transmits the data to the information terminal.
  • the information transceiving controller is further configured to: convert the graphic data in the content into an HTML format, and publish the graphic data in the HTML format to the web server for access by the information terminal.
  • the media server transmits the format converted audio and video data in a broadcast or multicast manner.
  • the media server further includes a streaming media server, configured to transmit the format converted audio and video data to the information terminal in a unicast manner.
  • the content network comprises: any one or more of an Internet, a broadcast television network, and an interactive network television network.
  • the setting media server is connected to the content network, and is connected to the information terminal in a WiFi manner, the media server includes an information transceiving controller and a web server, and the method includes:
  • the information transceiving controller receives the content sent by the content network, converts the audio and video data in the content into an RTP/RTCP encapsulation format, transmits the content to the information terminal, and forms a content directory in the HTML format according to the content and publishes the content directory to the web server. For information terminal access.
  • the content directory further includes playing parameters and transmission parameters of the audio and video data.
  • the method further includes: the information terminal accessing a content directory on the web server, and according to the content directory
  • the web server sends a control command for selecting the content
  • the web server forwards the received control command for selecting the content to the information transceiving controller; the information transceiving controller converts the audio and video data in the corresponding content into an RTP/RTCP encapsulation format according to the control command for selecting the content, and transmits the control command to the RTP/RTCP encapsulation format.
  • Information terminal forwards the received control command for selecting the content to the information transceiving controller; the information transceiving controller converts the audio and video data in the corresponding content into an RTP/RTCP encapsulation format according to the control command for selecting the content, and transmits the control command to the RTP/RTCP encapsulation format.
  • the method further includes: the information transceiving controller converting the graphic data in the content into an HTML format, and publishing the graphic data in the HTML format to the web
  • the server is accessed by the information terminal.
  • the media server transmits the format converted audio and video data in a broadcast or multicast manner.
  • the media server further includes a streaming media server, and the audio and video data is converted into an RTP/RTCP encapsulation format and then transmitted to the information terminal.
  • the streaming media server transmits the format converted sound to the information terminal in a unicast manner. Video data.
  • the content network comprises: an internet, a broadcast television network, and an interactive network Any one or two or more of the television networks.
  • the media server in the present invention converts audio and video data sent from different content networks into a format supported by the information terminal, that is, an RTP/RTCP encapsulation format, and transmits the data to the information terminal, thereby enabling the user to seamlessly Access content provided by each content network.
  • FIG. 1 is a schematic diagram of communication between a media server and an information terminal according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of audio and video transmission in a home application environment according to an embodiment of the present invention. detailed description
  • WiFi wireless fidelity
  • WiFi Wireless fidelity
  • RTP/RTCP Real-Time Transport Protocol/Real-Time Transport Control Protocol
  • audio and video playback technologies With the popularity of wireless LANs, more and more homes are equipped with wireless fidelity (WiFi) access points, and more and more information terminals are beginning to support WiFi access technology, so WiFi will become almost in the near future. Standard for all information terminals. The most obvious example is that most of the previous TVs did not support WiFi access technology, but with the rise of Internet TV (such as Google TV and Microsoft TV), future TVs will increasingly support WiFi access technology.
  • These information terminals that support WiFi access technology also generally support browser technology and streaming media technology based on Real-Time Transport Protocol/Real-Time Transport Control Protocol (RTP/RTCP) and corresponding audio and video playback technologies.
  • RTP/RTCP Real-Time Transport Protocol/Real-Time Transport Control Protocol
  • the basic idea of the present invention is to: design a media server capable of supporting and receiving content from various content network technologies; and then aggregating and converting the content
  • the format that the general information terminal can access is then accessed by the information terminal via WiFi.
  • most of the information terminals can receive and display the content without any improvement, so that the user can access the content using the appropriate information terminal at any place within the family.
  • the media server of the present invention includes an information transceiving controller and a web server;
  • the information transceiving controller is configured to receive the content sent by the content network, convert the audio and video data in the content into an RTP/RTCP encapsulation format, and transmit the data to the information terminal, and further form a content directory in an HTML format according to the content;
  • the web server is configured to publish a content directory in an HTML format formed by the information transceiving controller and is accessed by the information terminal.
  • the content network includes an Internet, a broadcast television network, an IPTV network, and the like.
  • the media server is connected to these content networks, such as the Internet via High Speed Downlink Access (HSDPA); connected to the IPTV network via a network cable; and capable of receiving DVB-T high-definition terrestrial digital broadcast signals.
  • HSDPA High Speed Downlink Access
  • the media server is connected to the information terminal via WiFi.
  • Information terminals include: televisions, desktop computers, mobile phones, notebook computers, and the like.
  • the present invention further provides a method for transmitting audio and video.
  • the media server is connected to the content network and is connected to the information terminal in a WiFi manner.
  • the media server includes an information transceiving controller and a web server, and the method includes:
  • the information receiving and receiving controller receives the content sent by the content network, converts the audio and video data in the received content into an RTP/RTCP encapsulation format, and transmits the data to the information terminal, and forms a content directory in the HTML format according to the content and publishes the content directory to the web server. For information terminal access.
  • the method for converting the audio and video data into the RTP/RTCP encapsulation format is the prior art, and details are not described herein.
  • the content directory further includes playing parameters and transmission parameters of the audio and video data, so that the information terminal can obtain the playing parameters and the transmission parameters by accessing the content directory, so that the information terminal can correctly receive according to the transmission parameters and the playing parameters. And play audio and video data.
  • the method further includes: the information terminal accessing the content directory on the web server, and sending a control command for selecting the content to the web server according to the content directory;
  • the web server forwards the received control command for selecting the content to the information transceiving controller;
  • the information transceiving controller converts the audio and video data in the corresponding content into an RTP/RTCP encapsulation format according to the control command for selecting the content, and transmits the control command to the RTP/RTCP encapsulation format.
  • Information terminal accessing the content directory on the web server, and sending a control command for selecting the content to the web server according to the content directory.
  • the method further includes: the information transceiving controller converting the graphic data in the content into an HTML format, and publishing the graphic data in the HTML format to the web server for information Terminal access.
  • the media server transmits the format converted audio and video data in a broadcast or multicast manner.
  • the media server further includes a streaming media server, and the streaming media server transmits the format converted audio and video data to the information terminal in a unicast manner.
  • the method of audio and video transmission in the home range includes:
  • Step 1 The media server parses the received CMMB signal to obtain program information (EPG/ESG), and converts the program information into an HTML page, and the HTML page is published on a web server embedded in the media server.
  • EPG/ESG program information
  • the HTML page contains program information (EPG/ESG) of each channel on the one hand, and playback parameters of audio and video data of these channels, such as audio format, video format, audio and video sample rate, time stamp information, etc.
  • EPG/ESG program information
  • playback parameters of audio and video data of these channels, such as audio format, video format, audio and video sample rate, time stamp information, etc.
  • SDP Session Description Protocol
  • the SDP file includes transmission parameters such as IP, User Datagram Protocol (UDP), RTP, and RTCP in addition to the description of the playback parameters.
  • UDP User Datagram Protocol
  • RTP User Datagram Protocol
  • RTCP Transmission Paragram Protocol
  • the program of one CCTV1 can be transmitted by using broadcast or multicast address parameters, so that multiple information terminals in the home range can receive it;
  • the unicast address parameter transmission can be used, so that the information terminal can connect to the media server according to the standard of the streaming media server to receive the audio and video data of the program.
  • the information terminal can obtain these SDP files by accessing a web server embedded in the media server.
  • Step 2 The media server transmits the audio and video data of each program in the CMMB signal to the information terminal by using IP multicast or broadcast technology through WiFi.
  • the transmission parameters of the audio and video data transmission of each program are consistent with the transmission information published on the HTML page in step 1, so that the information terminal can receive the corresponding data of the program according to the transmission parameters described in the SDP file.
  • the media server In general, especially in the case of a large number of data sources, such as the media server not only receives the CMMB signal, but also receives signals from other sources such as IPTV, if the bandwidth of the WiFi is insufficient to simultaneously transmit all programs in a broadcast or multicast manner.
  • the media server can embed the streaming server and transmit the audio and video data of the program through the streaming server in a unicast manner; another method is: sharing a set of transmission addresses by multiple programs For example, CCTV1 and CCTV2 share an IP broadcast or multicast address, but in fact the IP broadcast or multicast address only transmits one program.
  • the method of audio and video transmission within the family range may also include:
  • Step 3 The information terminal obtains program information in HTML format by accessing the web server embedded in the media server and displays it through its own browser. After the user selects to play a program such as CCTV1, the information terminal sends a control command for selecting CCTV1 to the Web server, as shown in FIG. Step 4: After the media server obtains the command of selecting CCTV1 through the embedded web server, if the audio and video data of CCTV1 has not been transmitted yet, the audio and video data of CCTV1 in the CMMB signal is converted into the RTP/RTCP encapsulation format, and then released according to The transmission parameters described in the SDP file of CCTV1 on the Web server are transmitted to the information terminal via WiFi.
  • Step 5 After obtaining the SDP file of CCTV1 from the Web server, the information terminal receives the audio and video data of CCTV1 according to the transmission parameter of CCTV1 described in the SDP file, and plays the program of CCTV1 according to the playing parameters of CCTV1 described in the SDP file.
  • the media server can receive the audio and video data of CCTV1 from different external content networks (such as digital television network, IPTV network or internet), and convert the format to the information terminal, and the information terminal You don't need to know the original source when playing the audio and video data.
  • external content networks such as digital television network, IPTV network or internet
  • the present invention maximizes the technologies supported by existing information terminals, including supporting WiFi access technology, browser technology, streaming media technology based on RTP/RTCP, and audio and video playback.
  • the technology does not need to improve the information terminal, so the cost is relatively low.
  • the present invention can facilitate the information terminal to seamlessly access the content provided by each content network within the family.
  • the low-end mobile phones since the low-end mobile phones generally only support one-quarter universal intermediate format (QCIF), or one-quarter video image array (QVGA) resolution video, you can add transcoding to the home media server.
  • the function ie: converts the audio and video data received from the content network into different video formats suitable for different information terminals, and then sends them to the corresponding information terminal. In this way, different information terminals can share the same audio and video data (but the video format is different), thereby realizing the "three screens in one" business function.
  • QCIF universal intermediate format
  • QVGA video image array

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Information Transfer Between Computers (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

本发明公开了一种媒体服务器,该媒体服务器与内容网络相连,并与信息终端以WiFi方式相连,该媒体服务器包括信息收发控制器和Web服务器;其中,信息收发控制器,用于接收内容网络发来的内容,将所述内容中的音视频数据转换为RTP/RTCP封装格式后传输给信息终端,还根据所述内容形成HTML格式的内容目录;Web服务器,用于发布信息收发控制器形成的HTML格式的内容目录并供信息终端访问。本发明还公开了一种音视频传输的方法。采用本发明能够方便用户访问各内容网络提供的内容。

Description

一种媒体服务器及音视频传输的方法 技术领域
本发明涉及三网融合技术, 尤其涉及一种媒体服务器及音视频传输的 方法。 背景技术
目前, 存在很多内容网络, 如以有线电视技术和无线广播技术为代表 的广播电视网络, 以交互式网络电视(IPTV )技术为代表的电信网络, 以 及互联网。其中,无线广播技术包括地面数字电视广播标准如 DVB-T( DVB, 数字视频广播)和 ISDB-T ( ISDB, 综合业务数字广播), 以及移动数字电 视广播标准如 DVB-H和***多媒体广播 ( CMMB )。 这些内容网络能 为用户提供各种内容, 因此为广大用户所青睐。
上述内容网络所基于的技术都很不相同, 例如广播电视网络中的 DVB-T传输主要釆用了传输流(TS ) 的标准, 而互联网上的音视频内容主 要通过超文本传输协议渐进式下载( HTTP Progressive Download )技术传输。 由于这个原因, 使得信息终端出现了分化。 例如, 广播电视网络的技术在 电视上得到很好的支持, IPTV则主要通过机顶盒支持, 而互联网则在移动 电话和 PC上得到很好的支持。这就导致普通用户在家庭环境下访问内容时 会受到设备的限制而不能 "无缝" 访问各内容。 例如, 用户在客厅通过电 视收看广播电视网络下传的内容时, 需要到书房的台式计算机上处理电子 邮件, 由于台式计算机不支持广播电视网络技术, 因此导致用户不能一边 处理邮件一边收看电视, 只能中断之前的电视收看。 发明内容
有鉴于此, 本发明的主要目的在于提供一种媒体服务器及音视频传输 的方法, 能够方便用户访问各内容网络提供的内容。
为达到上述目的, 本发明的技术方案是这样实现的:
一种媒体服务器, 与内容网络相连, 并与信息终端以 WiFi方式相连, 所述媒体服务器包括信息收发控制器和 Web服务器; 其中,
信息收发控制器, 用于接收内容网络发来的内容, 将所述内容中的 音视频数据转换为实时传输协议 /实时传输控制协议 ( RTP/RTCP )封装 格式后传输给信息终端, 还根据所述内容形成超文本链接标识语言 ( HTML )格式的内容目录;
Web服务器,用于发布信息收发控制器形成的 HTML格式的内容目 录并供信息终端访问。
优选地, 所述内容目录中还包含有音视频数据的播放参数和传输参 数。
优选地,所述 Web服务器还用于接收所述信息终端在访问所述内容 目录后发出的选择内容的控制命令, 并转发给信息收发控制器; 所述信 息收发控制器还用于根据所述选择内容的控制命令将相应内容中的音视 频数据转换为 RTP/RTCP封装格式后传输给所述信息终端。
优选地, 所述信息收发控制器还用于: 将所述内容中的图文数据转 换为 HTML格式, 并将 HTML格式的图文数据发布到所述 Web服务器 供信息终端访问。
优选地, 所述媒体服务器以广播或组播的方式传输格式转换后的音 视频数据。
优选地, 所述媒体服务器还包含有流媒体服务器, 该流媒体服务器 用于以单播的方式向信息终端传输格式转换后的音视频数据。 优选地, 所述内容网络包括: 互联网、 广播电视网络和交互式网络 电视网络中任意一种或任意两种以上。
一种音视频传输的方法, 设置媒体服务器与内容网络相连, 并与信 息终端以 WiFi方式相连, 所述媒体服务器包括信息收发控制器和 Web 服务器, 所述方法包括:
信息收发控制器接收内容网络发来的内容, 将所述内容中的音视频 数据转换为 RTP/RTCP封装格式后传输给信息终端, 还根据所述内容形 成 HTML格式的内容目录并发布到 Web服务器供信息终端访问。
优选地, 所述内容目录中还包含有音视频数据的播放参数和传输参 数。
优选地,在所述 Web服务器发布所述内容目录后,所述方法还包括: 信息终端访问 Web 服务器上的内容目录, 并根据所述内容目录向
Web服务器发送选择内容的控制命令;
Web服务器将收到的选择内容的控制命令转发给信息收发控制器; 信息收发控制器根据所述选择内容的控制命令将相应内容中的音视 频数据转换为 RTP/RTCP封装格式后传输给所述信息终端。
优选地, 在信息收发控制器收到内容之后, 所述方法还包括: 信息 收发控制器将所述内容中的图文数据转换为 HTML格式, 并将 HTML 格式的图文数据发布到所述 Web服务器供信息终端访问。
优选地, 所述媒体服务器以广播或组播的方式传输格式转换后的音 视频数据。
优选地, 所述媒体服务器还包含有流媒体服务器, 将音视频数据转 换为 RTP/RTCP封装格式后传输给信息终端具体为: 流媒体服务器以单 播的方式向信息终端传输格式转换后的音视频数据。
优选地, 所述内容网络包括: 互联网、 广播电视网络和交互式网络 电视网络中任意一种或任意两种以上。
由以上技术方案可以看出, 本发明中的媒体服务器将不同内容网络发 来的音视频数据都转换为信息终端支持的格式即 RTP/RTCP封装格式后传 输给信息终端, 从而使用户能够无缝访问各内容网络提供的内容。 附图说明
图 1为本发明实施例中媒体服务器与信息终端通信的示意图; 图 2为本发明实施例中在家庭应用环境下音视频传输的示意图。 具体实施方式
随着无线局域网的普及, 越来越多的家庭配置了无线保真 (WiFi )接 入点, 且越来越多的信息终端开始支持 WiFi接入技术, 因此 WiFi在不远 的将来会成为几乎所有信息终端的标配。 最明显的例子是, 以前的电视大 部分都不支持 WiFi接入技术,但是随着网络电视(如 Google TV和微软 TV ) 的兴起, 今后的电视会越来越多地支持 WiFi接入技术。 这些支持 WiFi接 入技术的信息终端, 通常也都支持浏览器技术和基于实时传输协议 /实时传 输控制协议( RTP/RTCP ) 的流媒体技术以及相应的音视频播放技术。
基于以上描述以及背景技术存在的问题, 本发明的基本构思是: 设 计一种媒体服务器, 该媒体服务器能够支持各种内容网络技术并能够从 这些内容网络接收内容; 再将这些内容进行聚合并转化成一般的信息终 端能够访问的格式, 然后通过 WiFi供信息终端访问。 这样, 大部分的信 息终端无需做改进就可以接收和展示这些内容, 从而方便用户在家庭范 围内的任何地点使用身边合适的信息终端访问这些内容。
以下结合附图对本发明的技术方案作详细说明。
如图 1所示,本发明的媒体服务器包括信息收发控制器和 Web服务 器; 其中, 信息收发控制器, 用于接收内容网络发来的内容, 将所述内容中的 音视频数据转换为 RTP/RTCP封装格式后传输给信息终端, 还根据所述 内容形成 HTML格式的内容目录;
Web服务器,用于发布信息收发控制器形成的 HTML格式的内容目 录并供信息终端访问。
其中, 如图 2所示, 内容网络包括有互联网、 广播电视网络、 IPTV 网络等。 媒体服务器与这些内容网络相连, 如与互联网通过高速下行分 组接入( HSDPA )相连; 与 IPTV网络通过网线相连; 并能够接收 DVB-T 高清地面数字广播信号。 另外, 媒体服务器通过 WiFi与信息终端相连。 信息终端包括: 电视机、 台式计算机、 移动电话、 笔记本计算机等。
相应地, 本发明还提供一种音视频传输的方法, 设置媒体服务器与 内容网络相连, 并与信息终端以 WiFi方式相连, 所述媒体服务器包括信 息收发控制器和 Web服务器, 该方法包括:
信息收发控制器接收内容网络发来的内容, 将收到的内容中的音视 频数据转换为 RTP/RTCP封装格式后传输给信息终端, 还根据该内容形 成 HTML格式的内容目录并发布到 Web服务器供信息终端访问。
其中, 如何将音视频数据转换为 RTP/RTCP封装格式为现有技术, 在此不再赘述。
其中,所述内容目录中还包含有音视频数据的播放参数和传输参数, 以便信息终端通过访问内容目录能得到这些播放参数和传输参数, 从而 使信息终端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。
在所述 Web服务器发布所述内容目录后, 所述方法还包括: 信息终端访问 Web 服务器上的内容目录, 并根据所述内容目录向 Web服务器发送选择内容的控制命令; Web服务器将收到的选择内容的控制命令转发给信息收发控制器; 信息收发控制器根据所述选择内容的控制命令将相应内容中的音视 频数据转换为 RTP/RTCP封装格式后传输给所述信息终端。
在信息收发控制器收到内容之后, 所述方法还包括: 信息收发控制 器将所述内容中的图文数据转换为 HTML格式, 并将 HTML格式的图 文数据发布到所述 Web服务器供信息终端访问。
所述媒体服务器以广播或组播的方式传输格式转换后的音视频数 据。
所述媒体服务器还包含有流媒体服务器, 流媒体服务器以单播的方 式向信息终端传输格式转换后的音视频数据。
以下通过一个在家庭应用环境下的实施例对本发明的技术方案作进 一步详细说明。
以转发 CMMB 信号中的音视频数据为例, 家庭范围内音视频传输 的方法包括:
步骤一, 媒体服务器对收到的 CMMB 信号进行解析得到节目信息 ( EPG/ESG ) , 并将节目信息转换为 HTML页面, 该 HTML页面发布 在媒体服务器内嵌的 Web服务器上。
该 HTML页面一方面包含各个频道的节目信息(EPG/ESG ) , 另一 方面还包括这些频道的音视频数据的播放参数, 如音频格式、视频格式、 音视频釆样率、时间戳信息等,这些播放参数通常以会话描述协议( SDP ) 文件的方式描述。 另外, 由于音视频数据会转换成 RTP/RTCP封装格式 通过 IP进行传输, 所以 SDP文件除了描述播放参数外, 还包括有如 IP、 用户数据报协议(UDP ) 、 RTP、 RTCP等传输参数。 这些传输参数通常 是由媒体服务器配置的, 例如, 一路 CCTV1 的节目可以釆用广播或组 播的地址参数传输, 使得家庭范围内的多个信息终端都可以接收到; 对 于另一路节目如 CCTV5 , 则可以釆用单播的地址参数传输, 使得信息终 端按照流媒体服务器的标准连接到媒体服务器上才能收到该节目的音视 频数据。 另外, 信息终端通过访问媒体服务器内嵌的 Web服务器可以得 到这些 SDP文件。
步骤二, 媒体服务器将 CMMB 信号中各个节目的音视频数据通过 WiFi利用 IP组播或广播技术传输给信息终端。
其中, 每个节目的音视频数据传输釆用的传输参数与步骤一中 HTML 页面上发布的传输信息相一致, 这样就可以保证信息终端按照 SDP文件描述的传输参数能够接收到节目的相应数据。
一般情况下, 尤其在数据来源比较多的情况下, 如媒体服务器不仅 接收 CMMB信号, 还从 IPTV等其他信号源接收信号, 如果 WiFi的带 宽不足以同时以广播或组播的方式传输所有节目的音视频数据, 则一种 方法是: 媒体服务器可以内嵌流媒体服务器并通过流媒体服务器以单播 的方式传输节目的音视频数据; 另一种方法是: 使多路节目共享一套传 输地址, 如 CCTV1和 CCTV2共享一个 IP广播或组播地址, 但实际上 该 IP广播或组播地址仅传输一路节目。 具体地说, 当用户通过 Web服 务器发送选择 CCTV2的命令时, 如果媒体服务器当前传输的是 CCTV1 的音视频数据, 则停止传输 CCTV1的音视频数据并转而传输 CCTV2的 音视频数据。这两种方法都可以节省 WiFi带宽, 并可以根据场景灵活运 用。
家庭范围内音视频传输的方法还可包括:
步骤三, 信息终端通过访问媒体服务器内嵌的 Web 服务器, 获得 HTML格式的节目信息并通过自身的浏览器展现出来。 在用户选择播放 一路节目如 CCTV1后, 信息终端向 Web服务器发送选择 CCTV1 的控 制命令, 如图 1所示。 步骤四、 媒体服务器通过内嵌的 Web服务器得到选择 CCTVl的命 令之后, 如果当前尚未传输 CCTV1的音视频数据, 则将 CMMB信号中 CCTV1 的音视频数据转换为 RTP/RTCP封装格式后, 按照发布在 Web 服务器上的 CCTV1的 SDP文件中描述的传输参数通过 WiFi传输给信息 终端。
步骤五, 信息终端从 Web服务器获得 CCTV1的 SDP文件后, 按照 SDP文件中描述的 CCTV1的传输参数接收 CCTV1的音视频数据,并按 照 SDP文件中描述的 CCTV1的播放参数播放 CCTV1的节目。
信息终端在发出选择 CCTV1 的控制命令后, 媒体服务器可以从外 部不同的内容网络(如数字电视网络、 IPTV网络或互联网)接收 CCTV1 的音视频数据, 并进行格式转换后传输给信息终端, 信息终端在播放该 音视频数据时可以不用知道其原始来源。
由上述本发明的技术方案可以看出, 本发明最大程度地套用了现有 信息终端都支持的技术, 包括支持 WiFi接入技术、 浏览器技术、 基于 RTP/RTCP 的流媒体技术以及音视频播放技术, 所以无需对信息终端做 改进, 因此成本比较低; 另外, 本发明可以方便信息终端在家庭范围内 对各内容网络提供的内容进行无缝访问。
另外, 由于中低端的移动电话一般只支持四分之一通用中间格式 ( QCIF ) 、 或四分之一的视频图像阵列 (QVGA ) 分辨率的视频, 因此 可以在家庭媒体服务器中增加转码功能, 即: 将从内容网络上收到的音 视频数据转化为适用于不同信息终端的不同视频格式, 然后发送给相应 的信息终端。这样,不同的信息终端都可以分享该相同的音视频数据(但 是视频格式不同) , 从而实现 "三屏合一" 的业务功能。
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、一种媒体服务器,其特征在于,所述媒体服务器与内容网络相连, 并与信息终端以 WiFi方式相连,所述媒体服务器包括信息收发控制器和 Web服务器; 其中,
信息收发控制器, 用于接收内容网络发来的内容, 将所述内容中的 音视频数据转换为实时传输协议 /实时传输控制协议 RTP/RTCP 封装格 式后传输给信息终端, 还根据所述内容形成超文本链接标识语言 HTML 格式的内容目录;
Web服务器,用于发布信息收发控制器形成的 HTML格式的内容目 录并供信息终端访问。
2、 根据权利要求 1所述的媒体服务器, 其特征在于, 所述内容目录 中还包含有音视频数据的播放参数和传输参数。
3、 根据权利要求 1所述的媒体服务器, 其特征在于, 所述 Web服 务器还用于接收所述信息终端在访问所述内容目录后发出的选择内容的 控制命令, 并转发给信息收发控制器; 所述信息收发控制器还用于根据 所述选择内容的控制命令将相应内容中的音视频数据转换为 RTP/RTCP 封装格式后传输给所述信息终端。
4、 根据权利要求 1所述的媒体服务器, 其特征在于, 所述信息收发 控制器还用于:将所述内容中的图文数据转换为 HTML格式,并将 HTML 格式的图文数据发布到所述 Web服务器供信息终端访问。
5、 根据权利要求 1所述的媒体服务器, 其特征在于, 所述媒体服务 器以广播或组播的方式传输格式转换后的音视频数据。
6、 根据权利要求 1所述的媒体服务器, 其特征在于, 所述媒体服务 器还包含有流媒体服务器, 该流媒体服务器用于以单播的方式向信息终 端传输格式转换后的音视频数据。
7、 根据权利要求 1所述的媒体服务器, 其特征在于, 所述内容网络 包括: 互联网、 广播电视网络和交互式网络电视网络中任意一种或任意 两种以上。
8、 一种音视频传输的方法, 其特征在于, 设置媒体服务器与内容网 络相连, 并与信息终端以 WiFi方式相连, 所述媒体服务器包括信息收发 控制器和 Web服务器, 所述方法包括:
信息收发控制器接收内容网络发来的内容, 将所述内容中的音视频 数据转换为 RTP/RTCP封装格式后传输给信息终端, 还根据所述内容形 成 HTML格式的内容目录并发布到 Web服务器供信息终端访问。
9、 根据权利要求 8所述的音视频传输的方法, 其特征在于, 所述内 容目录中还包含有音视频数据的播放参数和传输参数。
10、 根据权利要求 8所述的音视频传输的方法, 其特征在于, 在所 述 Web服务器发布所述内容目录后, 所述方法还包括:
信息终端访问 Web 服务器上的内容目录, 并根据所述内容目录向
Web服务器发送选择内容的控制命令;
Web服务器将收到的选择内容的控制命令转发给信息收发控制器; 信息收发控制器根据所述选择内容的控制命令将相应内容中的音视 频数据转换为 RTP/RTCP封装格式后传输给所述信息终端。
11、 根据权利要求 8所述的音视频传输的方法, 其特征在于, 在信 息收发控制器收到内容之后, 所述方法还包括: 信息收发控制器将所述 内容中的图文数据转换为 HTML格式, 并将 HTML格式的图文数据发 布到所述 Web服务器供信息终端访问。
12、 根据权利要求 8所述的音视频传输的方法, 其特征在于, 所述 媒体服务器以广播或组播的方式传输格式转换后的音视频数据。
13、 根据权利要求 8所述的音视频传输的方法, 其特征在于, 所述 媒体服务器还包含有流媒体服务器, 将音视频数据转换为 RTP/RTCP封 装格式后传输给信息终端具体为: 流媒体服务器以单播的方式向信息终 端传输格式转换后的音视频数据。
14、 根据权利要求 8所述的音视频传输的方法, 其特征在于, 所述 内容网络包括: 互联网、 广播电视网络和交互式网络电视网络中任意一 种或任意两种以上。
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