WO2007059677A1 - A method and a system for receiving iptv service - Google Patents

A method and a system for receiving iptv service Download PDF

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Publication number
WO2007059677A1
WO2007059677A1 PCT/CN2006/002225 CN2006002225W WO2007059677A1 WO 2007059677 A1 WO2007059677 A1 WO 2007059677A1 CN 2006002225 W CN2006002225 W CN 2006002225W WO 2007059677 A1 WO2007059677 A1 WO 2007059677A1
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WO
WIPO (PCT)
Prior art keywords
iptv
media
dmp
media stream
service
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2006/002225
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English (en)
French (fr)
Inventor
Minglei Zuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP06775542A priority Critical patent/EP1954047A4/en
Priority to CN200680012236.0A priority patent/CN101160968B/zh
Publication of WO2007059677A1 publication Critical patent/WO2007059677A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • 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
    • H04L65/764—Media network packet handling at the destination 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • 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
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/4147—PVR [Personal Video Recorder]
    • 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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H04N21/4355—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving reformatting operations of additional data, e.g. HTML pages on a television screen
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • 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
    • H04N21/4402—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 reformatting operations of video signals for household redistribution, storage or real-time display
    • 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
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via 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]
    • H04N21/60—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
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6175—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via 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]
    • H04N21/60—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 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP

Definitions

  • the present invention relates to the field of network television technologies, and in particular, to a network television service receiving system and method. Background of the invention
  • IPTV Internet TV
  • VoIP video on demand
  • the complete IPTV system consists of a headend system and terminal equipment.
  • the headend system includes: a user management system, an electronic program guide (EPG) system, a video encoder, and a media server.
  • the user management system is configured to manage user accounts, user login registration verification, and process charging information;
  • the EPG system is responsible for generating program directory and location information for providing to the user;
  • the video encoder is configured to complete compression encoding of the video, so as to be lower
  • the bandwidth is transmitted, and the video encoding method includes a plurality of encoding formats such as a moving image expert group 2 (Mpeg-2), Mpeg-4, H264, and a window media video (WMV), and the encoded content is stored on the media server;
  • the media server is used to process the user's request and deliver the content to the user.
  • Mpeg-2 moving image expert group 2
  • WMV window media video
  • the terminal device is mainly an IP set-top box (STB), which is placed in the user's home, and mainly completes receiving EPG information from the head end system, and outputs the same to a display device such as a television, and provides a man-machine operation interface for the user to select a program, and according to the user's Select to download the encoded media stream from the specified location of the headend system, decode it and output the video to a TV or other display device.
  • STB IP set-top box
  • IPTV is receiving more and more attention as the main service on the broadband network.
  • Many operators have begun trial operation of the IPTV service.
  • people download or download existing CDs, digital laser discs (DVDs), digital video cameras, digital cameras and other content digitally encoded on a computer hard disk through a broadband network.
  • CDs compact discs
  • DVDs digital laser discs
  • digital video cameras digital cameras
  • digital cameras digital cameras
  • other content digitally encoded on a computer hard disk
  • the demand for media playback through the home network and the corresponding technical product realization scheme are generated.
  • the Universal Plug and Play (UPnP) standard organization defines a home network media playback mechanism: Audio Video (AV) system structure, defining a standard Digital Media Server (DMS), digital Media Player (DMR) and Control Point (CP) device features and related services.
  • the digital media player can realize audio and video decoding functions; the digital media server provides media content and content directory information; the control point discovers the media server and the media player connected to the home network through the UPnP related protocol, and provides the content directory service through the same (CDS) Browse and find specified content, and control the digital media server and digital media player to connect and play through the server and player connection management service (CMS).
  • CDS Content Directory Service
  • DMR and CP can be integrated on one device, and a device called Digital Media Player (DMP) or Digital Media Adapter (DMA) has been implemented on the market using the UPnP AV system architecture standard. It implements the DMR and CP functions defined by UPnP, and outputs the decoded audio and video to display and audio equipment, such as a television, thereby enabling viewing of the media content provided on the DMS through network sharing.
  • DMP Digital Media Player
  • DMA Digital Media Adapter
  • the IPTV service is received by the dedicated IP STB device on the terminal side.
  • the IP STB completes communication with the IPTV head end system to obtain electronic program information, the user browses the electronic program information, and selects the program to be viewed, and then the IP STB receives the media program selected by the user from the media server of the head end system, and performs video decoding and output. Go to the user's TV for the user to watch.
  • the existing IPTV service mode has the following drawbacks:
  • the existing IP STB can only perform single-channel standard definition TV decoding. If the user has multiple TVs watching the program at the same time, a set-top box device must be provided for each TV. Each set-top box must provide all functions such as EPG processing, user control command processing, and media decoding processing, and the cost is high.
  • an object of the present invention is to provide an IPTV service receiving system for competing for lower cost of viewing IPTV media on different display devices.
  • Another object of the present invention is to provide an IFTV service receiving method.
  • the present invention provides an IPTV service receiving system, which is connected to an IPTV head end and a display device, the system comprising: at least one IPTV service to DMS service switching device IPTV2DMS and DMP;
  • the IPTV2DMS device is configured to communicate with the IPTV head end to obtain IPTV media information, and convert the data into a DMS service, and request an IPTV media from the IPTV head end according to the DMP request, and after the media stream of the IPTV media is received, the IPTV media is received.
  • the stream is converted to a format supported by DMP and provided to DMP;
  • the DMP is configured to request an IPTV media from an IPTV2DMS device, and decode the media stream and send the media stream to the display device.
  • the IPTV2DMS device includes:
  • the IPTV communication module is configured to communicate with the IPTV head end to obtain media information, and request the IPTV media from the IPTV head end, and after receiving the media stream of the IPTV media, pass the media stream
  • the instruction conversion module sends the media stream format conversion module to the media stream format conversion module
  • An instruction conversion module configured to implement instruction conversion between the DMS service and the IPTV service; a DMS function module, configured to provide a DMS service according to the IPTV media information; and a media stream format conversion module, configured to convert the media stream into a DMP The supported format is provided to DMP.
  • the IPTV2DMS device further includes:
  • a store-and-forward module is configured to store and forward the IPTV media stream.
  • the IPTV2DMS device and the DMP are directly connected through a physical communication interface supporting the IP protocol or connected through a home internal IP network.
  • the present invention also provides an IPTV service receiving method, including:
  • the IPTV2DMS device obtains IPTV media information for selection by the IPTV user;
  • the IPTV2DMS device receives the media information selected by the IPTV user, and requests the IPTV media stream selected by the user from the IPTV head end;
  • the IPTV2DMS device After receiving the IPTV media stream provided by the IPTV headend, the IPTV2DMS device converts the IPTV media stream into a format supported by the DMP device and provides it to the DMP.
  • the DMP decodes the media stream and sends the media stream to the display device.
  • the step A includes: the IPTV2DMS device receives the IPTV media information from the IPTV head end, converts the media information into a service information format of the DMS service, transmits the data to the DMP, and displays the data to the user through the DMP.
  • the step C further includes: storing the formatted media stream.
  • the method further includes the step of presetting the priority of the medium; the step C further comprising: and providing the medium priority use bandwidth of the higher priority to the DMP according to the priority of the medium.
  • the step C includes: the IPTV2DMS device determines whether the DMP supports the current media stream format, and if not supported, converts the current media stream into a DMP-supported format and provides Supply DMP.
  • the method further includes: decrypting the media stream according to the decrypted private key authorized by the digital copyright protection.
  • the IPTV2DMS device converts the IPTV into a standard DMS service, which facilitates the user to watch the IPTV on different televisions, without additionally adding a set top box, thereby reducing the user's consumption cost, and Due to the adoption of the playback quality measures and the provision of the store-and-forward module, the user's repeated payment is reduced while improving the playback quality.
  • FIG. 1 is a schematic diagram of a prior art system architecture
  • FIG. 3 is a block diagram of a system in the embodiment of the present invention.
  • FIG. 4 is a schematic flowchart diagram of the method in the embodiment of the present invention. Mode for carrying out the invention
  • the core idea of the present invention is to convert IPTV into a standard DMS service through an IPTV service to a DMS service switching device (IPTV2DMS), thereby facilitating users to watch IPTV on different televisions.
  • IPTV2DMS DMS service switching device
  • the structure of the IPTV service receiving system in the embodiment of the present invention is as shown in FIG. 2.
  • the system includes at least one IPTV2DMS device and DMP that converts the IPTV service into a DMS service.
  • the IPTV2DMS device and the DMP are connected by IP communication, and can be directly connected through a physical communication interface supporting the IP protocol.
  • the IPTV2DMS device and the DMP can also communicate through a home internal IP network, and the home internal IP network can be connected by an Ethernet switch. , a wireless local area network access point (LANAP), or a home gateway;
  • the network television service receiving system communicates with the IPTV head end through the IP network, acquires the IPTV media information provided by the IPTV head end, and converts the media information into an AV output to a display device connected thereto, such as a television set.
  • the DMP is sometimes referred to as DMA, and to avoid confusion, the following is referred to as DMP.
  • DMP integrates the DMR and CP functions of UPnP.
  • the DMP is mainly used to implement DMR functions, CP functions and media decoder functions including the UPnPAV architecture standard.
  • the DMR function includes: discovery of UPnP devices and services, media playback control, CMS, AV transmission services, etc.
  • the DMR is also used to connect to the television, decode the received media data and output it to the television.
  • the CP functions include discovering DMR and DMS devices and services through the UPnP protocol, browsing and selecting programs according to user control operations, and establishing media transmission connections by controlling DMR and DMS.
  • the IPTV2DMS device is configured to communicate with the IPTV headend system, and the IPTV client provides functions other than media decoding, including: receiving EPG data, requesting and selecting media, receiving media streams, and the like.
  • the IPTV2DMS device also communicates with the DMP device through a home network or the like, and provides DMS functions internally, including: a general UPnP device and a service discovery protocol, a CDS service, a CMS service, a content delivery service, and the like.
  • the IPTV2DMS device is further configured to implement data protocol conversion from IPTV to DMS, realize conversion function of data protocol formats of the two, convert EPG data into a standard format of UPnP DMS, and convert media stream format of IPTV into media supported by DMP. Format; convert the DMP control command into the corresponding IPTV playback control command format to issue a request to the IPTV headend.
  • the IPTV2DMS device may appear as a stand-alone device or as a software and hardware function module integrated in other devices, such as a personal computer (PC), a home gateway, an IP STB, a network game machine, or a network television.
  • PC personal computer
  • IP STB IP STB
  • network game machine or a network television.
  • FIG. 3 the structure of the IPTV2DMS device is shown in FIG. Referring to FIG. 3, the IPTV2DMS device includes an IPTV communication module, an instruction conversion module, a DMS function module, and a media stream format conversion module, and may further include a store-and-forward module.
  • the IPTV communication module is used to implement all functions of the ordinary IPTV except media decoding, and can communicate with the IPTV head end to obtain media information and media stream information, request the selected media from the media server, and receive the media stream.
  • the command conversion module is the core part of the IPTV2DMS device. It is mainly responsible for the coordination between the IPTV communication module, the DMS function module and the media stream format conversion module, and realizes the functions of DMS and IPTV command conversion.
  • the specific conversion operations include:
  • the store-and-forward module is configured to store and forward media content.
  • the IPTV2DMS device stores the content of the on-demand in the store-and-forward module until no one clicks on the media, if it is played in a certain media. If other users also order the same media, they can read directly from the store-and-forward module without sending the request to the remote IPTV headend again. In this way, when there are multiple users watching the same program, the content in the store-and-forward module can be directly forwarded without sending the request download to the IPTV head end again. It can reduce the pressure on the external network and provide a good broadcast quantity; at the same time, for media that is charged by the view count, the user can avoid repeated payment.
  • this form can also be used for live broadcast services, such as: Someone in the family is watching a live broadcast, at this time Another person found that someone in the network is watching live TV, so he only needs to retrieve the media content from the store-and-forward module to play and watch the same live broadcast.
  • the DMS function module is mainly responsible for providing DMS services conforming to the UPnP AV standard, such as: general UPnP devices and service discovery protocols, CDS services, CMS services, content delivery services, and the like.
  • the media stream format conversion module mainly converts the format of the media stream into a format supported by DMP.
  • the flow of the method for receiving the network television service in the embodiment of the present invention is as shown in FIG. 4, and the method specifically includes the following steps:
  • Step 1 Start the IPTV2DMS device and provide media information, ie, electronic program information, to DMP.
  • the IPTV communication module in the IPTV2DMS device sends the request content directory information to the IPTV head end to obtain the electronic program information, and the command conversion module converts the electronic program information acquired from the IPTV head end into the UPNP standard CDS service information format.
  • the CDS service information is provided to the DMS function module.
  • DMP discovers the CDS service information of the DMS function module through the UPnP discovery mechanism.
  • the electronic program information is displayed on the DMP user interface for the user to operate; for the DMP without the user display interface, the electronic program information is displayed in On the TV connected to the DMP, this is equivalent to the TV becoming a display device of the DMP, and the user's operation of the DMP will be reflected on the TV;
  • Step 2 The DMP accepts the media item information selected by the user and transmits the information to the IPTV2DMS device, and the IPTV2DMS device requests the media content requested by the user from the IPTV head end.
  • the user selects the required media item information through the DMP user interface, and transmits the selected item information to the IPTV2DMS device by the CP.
  • the DMS function module in the IPTV 2 DMS device After receiving the media entry information of the CP, the DMS function module in the IPTV 2 DMS device sends the entry information to the command conversion.
  • the module performs instruction conversion.
  • the command conversion module in the IPTV2DMS device converts the media item information into information identifiable by the IPTV head end and transmits the information to the IPTV communication module, and the IPTV communication module requests the media requested by the user from the IPTV head end.
  • Step 3 The IPTV head end transmits the media to the IPTV2DMS device, and the IPTV2DMS device converts the media content into a media content conforming to the UPnP DMS by the instruction conversion module, and then stores the media content in the store-and-forward module, when multiple users in the home.
  • the priority of the media can be specified, and the priority of the media with high priority can be ensured, thereby ensuring that the quality of the media with high priority is not affected.
  • Step 4 Determine whether the DMP device supports the current media stream format. If yes, go to step 6. Otherwise, go to step 5.
  • Step 5 The media stream format conversion module in the IPTV2DMS device converts the media stream into a DMP-supported format and transmits it to the DMP, and then performs step 6;
  • Step 6 The DMP decodes the media stream and outputs it to the display device such as a TV connected to it through the AV interface for viewing by the user.
  • the charging problem in the above operation process is mainly determined by the connection between the IPTV2DMS device and the operator and the content access.
  • the charging mode is the same as that of the ordinary IP STB connected to the network using the IPTV service, except that the IPTV2DMS device is relatively
  • the IP STB there may be cases where the same service type is accessed at the same time. In this case, it is required to charge at the same time according to the operator's charging regulations. For example, two people simultaneously order different two films, if both films are billed on a per-time basis. , you need to bill twice.
  • the foregoing storage and forwarding mechanism is adopted. When multiple users watch the same movie, since the IPTV2DMS device actually only establishes a connection with the IPTV head end, the payment only needs to be paid once. This saves the cost of the user.
  • IPTV2DMS devices For digital copyright protection, IPTV2DMS devices also need to be authorized to obtain corresponding solutions.
  • the secret key can decrypt the encrypted media content, which is done by the IPTV communication module in the IPTV2DMS device.
  • the decrypted content can also be content protected according to the requirements of copyright protection when it is transmitted in the home network, for example, using the IP-based Digital Content Transmission Protection (DTCP-IP) protocol to encrypt the content.
  • DTCP-IP IP-based Digital Content Transmission Protection
  • the present invention utilizes an IPTV receiving system to convert an IPTV service into a standard DMS service, which facilitates users to watch IPTV on different televisions, without additionally adding an STB, reducing user consumption costs, and adopting store-and-forward
  • the module makes it possible to reduce the user's recurring payment while improving the playback quality.

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

Description

一种网络电视业务接收系统及方法
技术领域
本发明涉及网络电视技术领域， 尤其涉及一种网絡电视业务接收系 统及方法。 发明背景
网络电视（IPTV )是通过宽带网络方式接收来自网络的视频和音频 等数字媒体内容。 由于宽带网络是基于 IP双向通信， 因此更容易实现视 频点播（VoD ) 业务。 用户可以在自己家中随时选择观看自己感兴趣的 节目。
完整的 IPTV 系统由头端系统和终端设备组成。 头端系统包括： 用 户管理系统、 电子节目指南 （EPG ) 系统、 视频编码器、 媒体服务器。 其中， 用户管理系统用于管理用户帐号、 用户登录注册验证和处理计费 信息； EPG系统负责生成节目目录和位置信息以提供给用户； 视频编码 器用于完成视频的压缩编码， 以便于以较低带宽进行传输， 视频编码的 方式有动态图像专家组 2 ( Mpeg-2 ), Mpeg-4, H264, 视窗媒体视频 ( WMV )等多种编码格式， 编码后的内容存储于媒体服务器上； 所述 的媒体服务器用于处理用户的请求， 并传送内容给用户。
所述的终端设备主要为 IP机顶盒（STB )， 放于用户家中， 主要完 成从头端系统接收 EPG信息，输出到显示设备如电视上， 同时提供人机 操作界面供给用户选择节目， 并根据用户的选择从头端系统指定位置下 载编码的媒体流， 进行解码后输出视频到电视或其他显示设备。
目前 IPTV作为宽带网络上的主要业务受到越来越多的关注， 已有 多家运营商开始进行 IPTV业务试运营。 另外， 随着计算机和宽带网络的发展， 人们通过宽带网络下载或将 已有的激光唱盘 （CD )、 数字激光视盘 （DVD )、 数码摄像机、 数码相 机等内容数字化编码处理后存储于计算机硬盘上的方式拥有了大量的 个人媒体内容。为了共享这些媒体内容，并在电视上观看这些媒体内容， 从而产生了通过家庭网络实现媒体播放的需求和相应的技术产品实现 方案。
为便于家庭网络媒体设备的互通， 目前通用即插即用 （UPnP )标准 组织定义了一种家庭网络媒体播放机制： 音频视频（AV )系统结构， 定 义了标准的数字媒体服务器 （DMS ), 数字媒体播放器 （DMR )和控制 点（CP )设备功能和相关服务。 其中数字媒体播放器可实现音频和视频 解码功能； 数字媒体服务器提供媒体内容和内容目录信息； 控制点通过 UPnP相关协议发现家庭网络上联网的媒体服务器和媒体播放器， 通过 其提供的内容目录服务（CDS )浏览和查找指定内容， 并通过服务器和 播放器连接管理服务（CMS )控制数字媒体服务器和数字媒体播放器完 成连接并进行播放。
一般来说， DMR和 CP可以集成在一个设备上， 目前市场上已经出 现了应用 UPnP AV 系统结构标准实现的一种称之为数字媒体播放机 ( DMP )或数字媒体适配器（DMA ) 的设备， 其实现了 UPnP定义的 DMR和 CP功能， 并将解码的音视频输出到显示和音响设备， 如电视机 上， 从而实现通过网络共享方式观看 DMS上提供的媒体内容。
目前实现 IPTV业务的方式中， 在终端侧是通过专用的 IP STB设备 来接收 IPTV业务。 IP STB完成与 IPTV头端系统通信获取电子节目信 息， 用户浏览电子节目信息， 并选择需要观看的节目， 再由 IP STB从头 端系统的媒体服务器接收用户选择的媒体节目 , 并进行视频解码后输出 到用户电视机上供用户观看。 由上述可知， 现有的 IPTV业务方式存在如下缺陷：
由于受解码处理能力的限制 ,现有 IP STB只能完成单路标准清晰度 电视解码， 如果用户有多台电视同时收看节目， 就必须为每台电视提供 一个机顶盒设备。每台机顶盒都必须提供 EPG处理、用户控制命令处理 和媒体解码处理等全部功能， 成本较高。
另外， 如果用户观看家庭内部拥有的媒体内容， 则另外需要一个
DMP设备， 对于用户来说， 一台电视同时配备 DMP设备和 IP STB设 备显然成本艮高。 发明内容
有鉴于此， 本发明的目的在于提供一种 IPTV业务接收系统， 用以 P争低在不同显示设备上收看 IPTV媒体的成本。 本发明的另一个目的在 于提供一种 IFTV业务接收方法。
根据上述目的本发明提供了一种 IPTV 业务接收系统， 该系统与 IPTV头端及显示设备相连， 该系统包括： 至少一个 IPTV业务到 DMS 业务转换设备 IPTV2DMS和 DMP;
其中， 所述 IPTV2DMS设备用于与 IPTV头端通信获取 IPTV媒体 信息，并转换成 DMS业务，以及根据 DMP的请求向 IPTV头端请求 IPTV 媒体， 在接收所述 IPTV媒体的媒体流后将 IPTV媒体流转化成 DMP支 持的格式， 并提供给 DMP;
所述 DMP用于向 IPTV2DMS设备请求 IPTV媒体， 以及将所述媒 体流解码后发送给所述显示设备。
所述 IPTV2DMS设备包括：
IPTV通讯模块，用于与 IPTV头端通讯获取媒体信息，以及向 IPTV 头端请求 IPTV媒体，在接收所述 IPTV媒体的媒体流后将该媒体流经过 指令转换模块发送给媒体流格式转换模块；
指令转换模块， 用于实现 DMS业务和 IPTV业务之间的指令转换； DMS功能模块， 用于根据所述 IPTV媒体信息提供 DMS服务； 媒体流格式转换模块， 用于将所述媒体流转换成 DMP支持的格式， 并提供给 DMP。
所述的 IPTV2DMS设备还包括：
存储转发模块， 用于存储和转发所述 IPTV媒体流。
其特征在于，所述 IPTV2DMS设备与 DMP之间通过支持 IP协议的 物理通信接口直接连接或经过家庭内部 IP网络连接。
本发明还提供了一种 IPTV业务接收方法， 包括：
A、 IPTV2DMS设备获取 IPTV媒体信息供 IPTV用户选择；
B、 IPTV2DMS设备接收 IPTV用户选择的媒体信息， 并向 IPTV头 端请求所述用户选择的 IPTV媒体流；
C、 IPTV2DMS设备接收 IPTV头端提供的所述 IPTV媒体流后， 将 其转化为 DMP设备支持的格式并提供给 DMP;
D、 DMP将所述媒体流解码后发送给显示设备。
所述步骤 A包括： IPTV2DMS设备向 IPTV头端接收 IPTV媒体信 息，将所述媒体信息转换为 DMS业务的服务信息格式后，传送给 DMP, 并通过 DMP显示给用户。
所述步驟 C进一步包括： 存储经过格式转换后的媒体流。
该方法进一步包括预先设定媒体的优先级的步骤； 所述步骤 C进一 步包括： 并根据所述媒体的优先级， 将优先级高的媒体优先使用带宽提 供给 DMP。
所述步骤 C包括： IPTV2DMS设备判断 DMP是否支持当前媒体流 格式， 在不支持的情况下， 将当前媒体流转换成 DMP支持的格式并提 供给 DMP。
步骤 C中在接收到所述 IPTV媒体流之后进一步包括： 根据数字版 权保护授权的解密私钥对所述媒体流进行解密。
由上述本发明提供的技术方案可以看出，本发明利用 IPTV2DMS设 备将 IPTV转化为一个标准的 DMS服务，方便了用户在不同的电视上观 看 IPTV, 无需另外增加机顶盒， 降低了用户消费成本， 并且由于采取 了播放质量措施及设置了存储转发模块， 使得在提高播放质量的同时减 少了用户的重复付费。 附图简要说明
图 1为现有技术系统架构图；
图 2为本发明实施例中所述系统的架构图；
图 3为本发明实施例中所述系统的模块关系图；
图 4为本发明实施例中所述方法的流程示意图。 实施本发明的方式
本发明的核心思想是， 通过 IPTV 业务到 DMS 业务转换设备 ( IPTV2DMS )将 IPTV转化为一个标准的 DMS服务， 从而方便了用户 在不同的电视上观看 IPTV。
本发明实施例的 IPTV业务接收系统的结构如图 2所示， 所述系统 包括至少一个将 IPTV服务转化为 DMS服务的 IPTV2DMS设备和 DMP。
IPTV2DMS设备和 DMP之间通过 IP通信连接， 可以直接通过支持 IP 协议的物理通信接口连接， IPTV2DMS设备与 DMP中间也可以经过一 个家庭内部 IP网络通信，所述的家庭内部 IP网络可以由以太网交换机、 无线局域网接入点 （ LANAP )、 或家庭网关组成； 本发明实施例的所 述网络电视业务接收系统通过 IP网絡与 IPTV头端进行通信连接， 获取 IPTV头端提供的 IPTV媒体信息， 并将所述媒体信息转换成 AV输出给 与其相连的显示设备， 如电视机。
所述的 DMP有时也称为 DMA, 为了避免混淆， 以下都称为 DMP。 DMP集成了 UPnP的 DMR和 CP功能。所述的 DMP主要用于实现包括 UPnPAV架构标准的 DMR功能、 CP功能和媒体解码器功能。
其中， 所述的 DMR功能包括： UPnP设备和服务的发现、 媒体播放 控制、 CMS、 AV传输服务等， DMR还用于与电视机相连， 对接收到的 媒体数据进行解码并输出到电视上。
所述的 CP功能包括通过 UPnP协议发现 DMR和 DMS设备和服务， 并根据用户控制操作浏览和选择节目，以及通过控制 DMR和 DMS建立 媒体传输连接。
所述的 IPTV2DMS设备用于与 IPTV头端系统通信， 提供 IPTV的 客户端除了媒体解码以外的其他功能， 包括： 接收 EPG数据、请求和选 定媒体、 接收媒体流等。 IPTV2DMS设备还通过家庭网络等与 DMP设 备通信， 并且对内提供 DMS的功能， 包括： 通用 UPnP设备和服务发 现协议， CDS服务， CMS服务， 内容传送服务等。
所述的 IPTV2DMS设备还用于实现从 IPTV到 DMS的数据协议转 换， 实现二者数据协议格式的转换功能，将 EPG数据转化为 UPnP DMS 标准格式；把 IPTV的媒体流格式转化为 DMP支持的媒体格式；把 DMP 的控制命令转化为相应的 IPTV播放控制命令格式向 IPTV头端发出请 求。
所述的 IPTV2DMS设备可作为独立设备方式出现，也可作为软硬件 功能模块， 集成在其他设备中，如个人计算机（PC )、家庭网关、 IP STB、 网络游戏机或网络电视机中。 该 IPTV2DMS设备的结构如图 3所示。 参照图 3 , 所述 IPTV2DMS 设备包括 IPTV通讯模块、 指令转换模块、 DMS功能模块和媒体流格式 转换模块， 还可以进一步包括存储转发模块。
其中， IPTV通讯模块用于实现普通 IPTV除了媒体解码之外的所有 功能， 能够与 IPTV头端通讯以获取媒体信息和媒体流信息， 向媒体服 务器请求选定的媒体， 并接收媒体流。
指令转换模块是 IPTV2DMS设备的核心部分， 主要负责 IPTV通讯 模块、 DMS功能模块和媒体流格式转换模块之间的协调工作，实现 DMS 和 IPTV指令转换的功能， 其具体的转换操作包括：
1 )将 IPTV通讯模块获取的 EPG转换成 CDS服务内容信息；
2 )将 DMS功能模块中对 CDS的操作转换成 IPTV通讯模块中对 EPG的操作， 例如： 当需要播放 CDS服务内容列表中的内容时， 可以 将 CDS服务内容转化成 EPG相应的内容， 由 IPTV通讯模块对相应的 EPG内容进行播放的操作；
3 )将获取的媒体流数据通过存储转发模块发送给媒体流格式转换模 块；
存储转发模块用于存储和转发媒体内容， 当有用户点播的时候， IPTV2DMS设备将这次点播的内容存储在存储转发模块中， 直到没有人 点播该媒体的时候才释放， 如果在某媒体播放时有其他的用户也来点播 同样的媒体， 则可以直接从存储转发模块中读取， 而不用再次向远端的 IPTV 头端发送请求。 这样在有多个用户观看同一节目的时候， 可以直 接将该存储转发模块中的内容进行转发， 而不用再次向 IPTV头端发送 请求下载。 可以减少对外部网络的压力， 提供好的播^：量； 同时对于 按观看次数计费的媒体， 用户可以避免重复付费。 同样， 对于直播的业 务也可以采用这种形式， 如： 家庭中有人在看一场直播的比赛， 此时有 另一人发现网络中有人正在看直播电视， 于是他只需要从存储转发模块 中取得该媒体内容进行播放即可观看同样的直播比赛。
DMS功能模块主要负责对内提供符合 UPnP AV标准的 DMS服务， 如： 通用 UPnP设备和服务发现协议、 CDS服务、 CMS服务、 内容传送 服务等。
媒体流格式转换模块主要是将媒体流的格式转换成 DMP 支持的格 式。
本发明实施例中网絡电视业务接收方法的流程如图 4所示， 该方法 具体包括如下步骤：
步骤 1: 启动 IPTV2DMS 设备， 提供媒体信息即电子节目信息给 DMP。
IPTV2DMS设备启动后， IPTV2DMS设备中的 IPTV通讯模块发送 请求内容目录信息给 IPTV头端， 获取电子节目信息， 指令转换模块将 从 IPTV头端获取的电子节目信息转换为 UPnP标准的 CDS服务信息格 式后，将该 CDS服务信息提供给 DMS功能模块。 DMP通过 UPnP的发 现机制发现 DMS功能模块的 CDS服务信息， 对于有用户界面的 DMP, 电子节目信息会显示在 DMP的用户界面上供用户操作； 对于没有用户 显示界面的 DMP， 电子节目信息显示在与 DMP相连的电视机上面， 此 时相当于电视机成为了 DMP的一个显示设备，用户对 DMP的操作将会 反映到电视机上面去；
步骤 2: DMP接受用户选择的媒体条目信息， 并传送给 IPTV2DMS 设备， IPTV2DMS设备向 IPTV头端请求所述用户要求的媒体内容。
用户通过所述 DMP用户界面选择需要的媒体条目信息， 将所述选 择的奈目信息由 CP传送给 IPTV2DMS设备。 IPTV2DMS设备中的 DMS 功能模块在收到 CP的媒体条目信息后， 将该条目信息发送给指令转换 模块进行指令转换。 IPTV2DMS设备中的指令转换模块将该媒体条目信 息转换成为 IPTV头端可识别的信息再传送给 IPTV通讯模块， 由 IPTV 通讯模块向 IPTV头端请求所述用户要求的媒体。
步骤 3: IPTV头端将所述的媒体传送给 IPTV2DMS设备, IPTV2DMS 设备将所述媒体内容经指令转换模块转换成符合 UPnP DMS 的媒体内 容后， 存储于存储转发模块中， 当家庭中多个用户同时通过 IPTV进行 视频播放的时候，为保证每个视频播放的质量，可以规定媒体的优先级， 保证优先级高的媒体带宽优先得到满足， 从而确保了优先级高的媒体播 放质量不会受到影响。
步骤 4: 判断 DMP设备是否支持当前的媒体流格式， 如果是， 则执 行步骤 6， 否则执行步驟 5。
步骤 5: IPTV2DMS设备中的媒体流格式转换模块将所述媒体流转 换为 DMP支持的格式传送给 DMP, 然后执行步骤 6;
步骤 6: DMP解码媒体流， 并通过 AV接口输出给与其相连的电视 机等显示设备上， 供用户观看。
上述操作过程中对于计费的问题，主要决定于 IPTV2DMS设备与运 营商之间的连接和内容访问的情况，其计费方式和普通的 IP STB连接到 网络使用 IPTV业务大致相同， 只是 IPTV2DMS设备相对于 IP STB可 能存在同时访问相同业务类型的情况 , 这时需要根据运营商的收费规定 同时计费， 如： 两个人同时点播了不同的两部片子， 如果这两部片子都 是按次计费的， 则需要计费两次。但是， 在 IPTV2DMS设备采用前面所 述的存储转发的机制， 当多个用户收看同一个片子的时候， 由于 IPTV2DMS设备实际上仅仅和 IPTV头端建立了一个连接， 所以付费只 需要付一次即可， 这样节约了用户的成本的。
对于数字版权保护， IPTV2DMS设备也需要经过授权获取相应的解 密秘钥才能对加密的媒体内容进行解密播放， 这些工作都由 IPTV2DMS 设备中的 IPTV通讯模块来完成。 解密后的内容在家庭网络中传播时同 样可以根据版权保护的要求进行内容保护，例如使用基于 IP的数字内容 传输保护 （DTCP-IP )协议对内容进行加密。
综上所述，本发明利用 IPTV接收系统将 IPTV业务转化为一个标准 的 DMS 服务， 方便了用户在不同的电视上观看 IPTV, 无需另外增加 STB, 降低了用户消费成本， 并且由于采取了存储转发模块， 使得在提 高播放质量的同时减少了用户的重复付费。
以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围 并不局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范 围内， 可轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应该以权利要求的保护范围为准。

Claims

权利要求书
1、 一种网络电视 IPTV业务接收系统， 该系统与 IPTV头端及显示 设备相连， 其特征在于, 该系统包括： 至少一个 IPTV业务到数字媒体 服务器 DMS业务转换设备 IPTV2DMS和数字媒体播放机 DMP;
其中， 所述 IPTV2DMS设备用于与 IPTV头端通信获取 IPTV媒体 信息 ,并转换成 DMS业务，以及才艮据 DMP的请求向 IPTV头端请求 IPTV 媒体， 在接收所述 IPTV媒体的媒体流后将 IPTV媒体流转化成 DMP支 持的格式， 并提供给 DMP;
所述 DMP用于向 IPTV2DMS设备请求 IPTV媒体， 以及将所述媒 体流解码后发送给所述显示设备。
2、 如权利要求 1所述的一种 IPTV业务接收系统, 其特征在于， 所 述 IPTV2DMS设备包括：
IPTV通讯模块，用于与 IPTV头端通讯获取媒体信息，以及向 IPTV 头端请求 IPTV媒体，在接收所述 IPTV媒体的媒体流后将该媒体流经过 指令转换模块发送给媒体流格式转换模块；
指令转换模块， 用于实现 DMS业务和 IPTV业务之间的指令转换； DMS功能模块， 用于根据所述 IPTV媒体信息提供 DMS服务； 媒体流格式转换模块， 用于将所述媒体流转换成 DMP支持的格式， 并提供给 DMP。
3、 如权利要求 2所述的一种 IPTV业务接收系统， 其特征在于， 所 述的 IPTV2DMS设备还包括：
存储转发模块， 用于存储和转发所述 EPTV媒体流。
4、 如权利要 1所述的一种 IPTV业务接收系统， 其特征在于， 所 述 IFTV2DMS设备与 DMP之间通过支持 IP协议的物理通信接口直接连 接或经过家庭内部 IP网络连接。
5、 一种 IPTV业务接收方法， 其特征在于， 包括：
A、 IPTV2DMS设备获取 IPTV媒体信息供 IPTV用户选择；
B、 IPTV2DMS设备接收 IPTV用户选择的媒体信息， 并向 IPTV头 端请求所述用户选择的 IPTV媒体流；
C、 IPTV2DMS设备接收 IPTV头端提供的所述 IPTV媒体流后， 将 其转化为 DMP设备支持的格式并提供给 DMP;
D、 DMP将所述媒体流解码后发送给显示设备。
6、 如权利要求 5所述的一种 IPTV业务接收方法， 其特征在于， 所 述步驟 A包括：
IPTV2DMS设备向 IPTV头端接收 IPTV媒体信息， 将所述媒体信 息转换为 DMS业务的服务信息格式后， 传送给 DMP, 并通过 DMP显 示给用户。
7、 如权利要求 5所述的一种 IPTV业务接收方法， 其特征在于， 所 述步骤 C进一步包括：
存储经过格式转换后的媒体流。
8、 如权利要求 5所述的一种 IPTV业务接收方法， 其特征在于， 该 方法进一步包括预先设定媒体的优先级的步骤；
所述步骤 C进一步包括： 并根据所述媒体的优先级， 将优先级高的 媒体优先使用带宽提供给 DMP。
9、 如权利要求 5所述的一种 IPTV业务接收方法， 其特征在于， 所 述步骤 C包括：
IPTV2DMS设备判断 DMP是否支持当前媒体流格式， 在不支持的 情况下， 将当前媒体流转换成 DMP支持的格式并提供给 DMP。
10、 根据权利要求 5所述的一种 IPTV业务接收方法， 其特征在于， 步骤 C中在接收到所述 IPTV媒体流之后进一步包括： 根据数字版权保 护授权的解密私钥对所述媒体流进行解密。
PCT/CN2006/002225 2005-11-24 2006-08-30 A method and a system for receiving iptv service Ceased WO2007059677A1 (en)

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