WO2009055988A1 - Procédé de décalage temporel pour un système iptv sur des réseaux de prochaine génération - Google Patents

Procédé de décalage temporel pour un système iptv sur des réseaux de prochaine génération Download PDF

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Publication number
WO2009055988A1
WO2009055988A1 PCT/CN2007/003979 CN2007003979W WO2009055988A1 WO 2009055988 A1 WO2009055988 A1 WO 2009055988A1 CN 2007003979 W CN2007003979 W CN 2007003979W WO 2009055988 A1 WO2009055988 A1 WO 2009055988A1
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WIPO (PCT)
Prior art keywords
content delivery
control module
module
service control
iptv terminal
Prior art date
Application number
PCT/CN2007/003979
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English (en)
Chinese (zh)
Inventor
Hongfei Xia
Original Assignee
Zte Corporation
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Filing date
Publication date
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Publication of WO2009055988A1 publication Critical patent/WO2009055988A1/fr

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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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/27—Server based end-user applications
    • H04N21/274—Storing end-user multimedia data in response to end-user request, e.g. network recorder
    • H04N21/2747—Remote storage of video programs received via the downstream path, e.g. from the server
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4333—Processing operations in response to a pause request
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—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 
    • H04N21/63—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

  • NGN Next Generation Communication Network
  • IMS IP Multimedia Subsystem
  • IMS is based on the SIP protocol. IMS has been recognized as the main technology and architecture for next-generation network convergence.
  • Interactive Internet TV also known as IPTV (Internet Protocol Television)
  • IPTV Internet Protocol Television
  • IPTV uses ADSL or Ethernet to access the broadband network, transmits TV signals through the Internet protocol, and provides a variety of digital media services including TV programs through the TV and set-top box (STB).
  • STB set-top box
  • the present invention mainly discusses how to implement IPTV time shifting technology without changing the current NGN IMS or NGN non-IMS architecture.
  • the broadcast control/multicast copy point module includes the following steps: Step 1: After the IPTV terminal initiates a live broadcast request to the service control module, the service control module, the IPTV application module, the content delivery control module, the content delivery and storage module, the RACF, and the group The broadcast control/multicast copy point module interacts to obtain the URL information of the content delivery and storage module that provides the live channel service. Step 2: The IPTV terminal establishes an RTSP link with the service control module, and the service control module delivers the URL of the storage module according to the content.
  • the information and content delivery and storage module establishes an RTSP link; Step 3: After the IPTV terminal sends the time shift program request to the service control module, the service control module requests the time delivery program from the content delivery and storage module; and step four, content delivery and storage The module sends an RTSP time-shifted program stream to the IPTV.
  • the method further includes a step (A) between step 2 and step 3, the IPTV terminal sends a request to join the multicast channel to the multicast control/multicast replication point module; and step 3 (B), content delivery and storage The module provides a live content stream to the IPTV terminal.
  • the method further includes: Step 3 (A) between Step 1 and Step 2 and Step 3 (B) between Step 2 and Step 3, wherein Step 3 (A) comprises: IPTV terminal to multicast control/multicast The copy point module sends a request to join the multicast channel; and step 3 (B) includes: the content delivery and storage module provides a direct "content stream" to the IPTV terminal.
  • step four the IPTV terminal The multicast control/multicast replication point module requests to exit the group channel. This step is between step 3 and step 4 or between step 3 (B) and step 3.
  • step 1 further includes: the service control module interacts with the content delivery control module to obtain URL information of the content delivery and storage module that provides the live channel service; and the service control module to the IPTV terminal Returning the URL information of the content delivery and storage module providing the live channel service, wherein the content delivery control module returns to provide the IPTV application module Before the content delivery of the live channel service and the URL information of the storage module, the content delivery control module selects an appropriate content delivery and storage module according to the distribution policy, and allocates the local resources of the selected content delivery and storage module, and the RACF. The module interacts to cause the RACF to allocate network resources.
  • the service control module interacts with the RACF module to cause the RACF to allocate network resources and return the URL packet of the content delivery and storage module providing the live channel service to the IPTV terminal.
  • the service control module requests the RACF module to allocate network resource information to support network path information from the content delivery and storage module to the IPTV terminal; the RACF module allocates network resource information; and the service control module returns the content providing the live channel service to the IPTV terminal Deliver the URL information of the storage module.
  • the service control module interacts with the content delivery control module to obtain the URL information of the content delivery and storage module providing the live channel service, including the following processing: the service control module sends a live channel URL request message to the IPTV application module; the IPTV application module sends the content to the content The delivery control module forwards the live channel URL request message; the content delivery control module returns the URL information of the content delivery and storage module providing the live channel service to the IPTV application module; and the IPTV application module returns the content delivery of the live channel service to the service control module The URL information of the storage module.
  • the interactive network television system may further include a NACF.
  • the method further includes: after the service control module receives the direct request from the IPTV terminal, Interacting with the NACF to capture the location information of the IPTV terminal in the network.
  • the service control module interacts with the NACF to obtain the location information of the IPTV terminal in the network, including the following processing: The service control module requests the IPTV terminal from the NACF in the network. The location information of the IPTV terminal is returned to the service control module by the NACF.
  • the method may further include: after the service control module receives the live broadcast request of the IPTV terminal, according to the IPTV
  • the user information of the terminal authenticates and authenticates the live broadcast request of the IPTV terminal, and performs subsequent operations in the case of authentication and authentication, otherwise, the error message is returned to the IPTV terminal and then the live broadcast is exited.
  • the method may further include: Delivery and storage through business control modules and content The block interacts to end the time shifting program stream.
  • the method may further include: after ending the time shifting the program stream, the service control module interacts with the RACF to release the network resource.
  • the method may further include: shifting the program stream at the end Afterwards, the service control module interacts with the content delivery and storage module to release the distribution resource. In addition, the method may further include: the service control module notifying the IPTV terminal that the time shift is over. According to still another aspect of the present invention, a next generation is proposed.
  • Interactive network television in communication network The time-shifting method of the system, the interactive network television system comprises: an IPTV terminal, a service control module, an IPTV application module, a content delivery control module, a content delivery and storage module, a NACF, a RACF, and a multicast control/multicast replication point module,
  • the method includes: the IPTV terminal establishes an RTSP link with the service control module, and the service control module establishes an RTSP link with the content delivery and storage module according to the URL information of the content delivery and storage module; after the IPTV terminal sends the time shift program request to the service control module,
  • the service control module requests the time delivery program from the content delivery and storage module; and the content delivery and storage module sends the RTSP time-shifted program stream to the IPTV terminal.
  • the URL information is obtained by the following steps: After receiving the live broadcast request from the IPTV terminal, the service control module interacts with the NACF to obtain location information of the IPTV terminal in the network; the service control module receives the IPTV terminal returned by the NACF. After the location information, interacting with the content delivery control module to obtain URL information of the content delivery and storage module providing the live channel service; and the service control module interacting with the RACF module to cause the RACF to allocate network resources and provide a live broadcast to the IPTV terminal The content of the channel service is delivered with the URL information of the storage module.
  • the method further includes: the IPTV terminal enters through the service control module and the content delivery and storage module
  • the method further includes: the service control module interacts with the RACF to release the network resource; and the service control module interacts with the content delivery and storage module to release the distribution resource.
  • the method further includes: the service control module notifying the IPTV terminal that the time shift is over. Therefore, the method of the present invention has been fully integrated into the next generation network architecture (NGN IMS or NGN non-IMS) without any modification to the existing NGN network architecture; and because the IPTV system based on the architecture implements the NGN network
  • NGN IMS next generation network architecture
  • NGN non-IMS next generation network architecture
  • FIG. 1 is a flow chart of a time shifting method in accordance with the present invention
  • Figure 2 is a message flow diagram in accordance with an embodiment of the method of the present invention
  • Figure 3 is a flow chart of another method in accordance with the present invention.
  • 1 is a flow chart of a time shifting method in accordance with the present invention. As shown in FIG. 1 , the following steps are performed: S102: After the IPTV terminal initiates a live broadcast request to the service control module, and the service control module,
  • the IPTV application module, the content delivery control module, the content delivery and storage module, the RACF, and the multicast control/multicast replication point module interact to obtain URL information of the content delivery and storage module that provides the live channel service;
  • the IPTV terminal establishes an RTSP link with the service control module, and the service control module establishes an RTSP link according to the URL information of the content delivery and storage module and the content delivery and storage module;
  • the service control module requests the time delivery program from the content delivery and storage module
  • Step S106 A
  • the IPTV terminal sends a request to join the multicast channel to the multicast control/multicast replication point module
  • step S106(B) content delivery and The storage module provides a live content stream to the IPTV terminal.
  • Step S106 (A) may also be located between step S102 and step S104
  • step S106 (B) is located between step S104 and step S106.
  • the method further includes being located between step S106 and step S108 or said step 106
  • step S102 further includes: the service control module interacts with the content delivery control module to obtain the content providing the live channel service. Delivering the URL information of the storage module; and the service control module returns the URL information of the content delivery and storage module providing the live channel service to the IPTV terminal.
  • the method further includes: the content delivery control module selects an appropriate content delivery and storage module according to the distribution policy, and allocates the selected The content is delivered with the local resources of the storage module and interacts with the RACF module to enable the RACF to allocate network resources. And, the service control module interacts with the RACF module to enable the RACF to allocate network resources and return the URL information of the content delivery and storage module that provides the live channel service to the IPTV terminal.
  • the service control module requests the RACF module to allocate network resource information to support the Content delivery and storage system to network path information of the IPTV terminal; the RACF module allocates network resource information; and the service control module returns the URL information of the content delivery and storage module providing the live channel service to the IPTV terminal.
  • the service control module interacts with the content delivery control module to obtain the URL information of the content delivery and storage module providing the live channel service, including the following processing: the service control module sends a live channel URL request message to the IPTV application module; the IPTV application module sends the content to the content The delivery control module forwards the live channel URL request message; the content delivery control module returns the URL information of the content delivery and storage module providing the live channel service to the IPTV application module; and the IPTV application module returns the content delivery of the live channel service to the service control module The URL information of the storage module.
  • the interactive network television system can further include NACF, in the service control module with Before the content delivery interacts with the storage module or the content delivery control module, the method further includes: after receiving the live broadcast request from the IPTV terminal, the service control module interacts with the NACF to obtain location information of the IPTV terminal in the network.
  • the service control module interacts with the NACF to obtain location information of the IPTV terminal in the network, where the service control module requests the NACF for location information of the IPTV terminal in the network, and the NACF returns the location information of the IPTV terminal to the service control module.
  • the method further includes: after the service control module receives the live broadcast request of the IPTV terminal, and performs authentication and authentication on the IPTV terminal according to the user information of the IPTV terminal. Right, and in the case of passing authentication and authentication, perform subsequent operations, otherwise return an error message to the IPTV terminal and exit the live broadcast.
  • the method may further include: the IPTV terminal interacts with the content delivery and storage module through the service control module to end the time shifting program stream.
  • the method may further include: after ending the time shifting the program stream, the service control module interacts with the RACF
  • the method may further include: after ending the time-shifting program stream, the service control module interacts with the content delivery and storage module to release the distribution resource.
  • the method may further include: the service control module notifying the IPTV The terminal time shift ends.
  • Figure 2 is a message flow diagram in accordance with an embodiment of the method of the present invention.
  • the interactive network television system involved in the method of the present invention includes the following modules: IPTV Terminal Functions, IPTV A hardware-implemented set-top box or a terminal device with an IPTV set-top box function implemented by pure software; a Service Control Functions module corresponding to a main functional entity set of a service control layer in an NGN network, in an IPTV system of an NGN IMS network architecture , the module refers to the Core IMS functional entity, this function
  • the entity provides a SIP-based session control mechanism, and provides IPTV terminal user authentication, authentication, and request resource admission control (RACF) functions for resource allocation.
  • RCF resource admission control
  • the module also interacts with the IPTV terminal, the IPTV application function, and the content distribution function to perform SIP. Conversation, complete security, QoS, billing, roaming, etc.
  • IPTV Applications Functions module which allows IPTV terminals to select and purchase content, and can process requests from IPTV terminals for application authentication and application logic (IPTV on-demand, live broadcast applications, application selection, etc.), Processing content metadata and other information, in the IPTV system based on the NGN architecture, the module communicates with the content delivery and storage module, processes the request for selecting the content delivery and storage module address information from the service control; Content Delivery Control
  • the Functions module which provides global control over content distribution and content storage modules to optimize content distribution, select and deliver content to end users, consists of two main functions: the Distribution Control Function (Distribution Control Function) and Location Function, the distribution control function is mainly to optimize the content distribution policy, which manages the distribution information of the content delivery & storage function, and the location function is used to identify the content delivery and storage function to deliver the content to the media client.
  • Location information its selection criteria mainly include distribution information and content delivery and storage functions, terminal information (such as terminal location and capabilities); Content Delivery & Storage Functions module, complete distribution, The function of caching and storing content and sending it to the end user, the module can process media control messages, such as: pause, fast forward, to control the media stream of the IPTV system, the module mainly includes local control functions of the content (such as streaming service control function) ), delivery functions (unicast and multicast delivery methods), caching and storage functions, and distribution functions.
  • the delivery function is mainly to send the content stream to be delivered to the media client, or to provide file download and upload files from the media client.
  • the caching and storage functions are mainly responsible for buffering time-shifted live streams and storing file contents.
  • the distribution function is mainly responsible for distributing direct "stream and file content" within the content delivery & storage function, and can also accept content preparation function content; resources; System ( Resource and Admission Control Functions module, the RACF component in the NGN network, which completes the resource control request from the service control module, determines the resources of the available Transport Stratum, and interacts with the bearer layer to complete bandwidth reservation, allocation, and packet bypass.
  • System Resource and Admission Control Functions module, the RACF component in the NGN network, which completes the resource control request from the service control module, determines the resources of the available Transport Stratum, and interacts with the bearer layer to complete bandwidth reservation, allocation, and packet bypass.
  • the embodiment of the time shifting process of the present invention specifically includes the following steps.
  • the preset conditions of the step are: the content preparation and the network attaching function have been completed.
  • the server of the content delivery and storage module has been added to the multicast group of the multicast replication/multicast control point:
  • Step 202 The IPTV terminal performs the direct preparation work, and the application selection function that interacts with the IPTV application function has been completed, and Obtaining some parameters required for the live application, such as the channel ID, etc.;
  • Step 204 the IPTV terminal initiates a direct request to the service control module, corresponding to the NGN IMS network architecture is to initiate a direct request to the Core IMS function;
  • step 206 service control
  • the live request of the module to the IPTV terminal is authenticated and authenticated according to the user information of the terminal. If yes, the process proceeds to S208.
  • Step 208 the service control module requests the IPTV terminal from the NACF module.
  • the location information in the network Step 210, the NACF module returns the location information of the IPTV terminal in the network to the service control module;
  • Step 212, the service control module sends a request message of the live channel URL to the IPTV application function module;
  • Step 214 the IPTV application The function module forwards the request for the live channel URL to the content delivery control module.
  • Step 216 the content delivery control module selects an appropriate content delivery and storage function (acquiring URL information) according to a distribution policy (such as content delivery and storage device storage status, etc.)
  • the resource distribution control function is allocated to the content delivery and storage function;
  • step 218, the content delivery control function returns the URL information of the content delivery and the storage providing the live channel service to the IPTV application function;
  • Step 224 the RACF module allocates the network resource 4; in step 226, the RACF module returns the allocated network resource information to the service control function; Step 228, the service control module returns the content delivery and the live delivery service to the IPTV terminal a URL address of the storage module; Step 230, the IPTV terminal establishes an RTSP link to the service control module; Step 232: The service control module delivers and stores the selected module according to the selected content
  • Step 234 The IPTV terminal sends a request to join the group channel to the group "control/group" replication point; Step 236, the content delivery and storage module providing the live stream provides the live content stream to the IPTV terminal; Step 238, the IPTV terminal provides The service control module sends a time shift program request; Step 240, the service control module requests a time shift program from the content delivery and storage module; Step 242, the IPTV terminal requests the multicast control/multicast replication point to exit the multicast channel; Step 244, Content The delivery and storage module provides an RTSP time-shifted program stream to the IPTV terminal; Step 246, the IPTV terminal sends an end time-shifted program request to the service control module; Step 248, the service control module sends the content delivery and storage module to the end of the time-shifted program Step 250: The content delivery and storage module providing the time shift program sends an end time shift program response to the service control module; Step 252: The service control module requests the RACF module to release the network resource request; Step 254: The RACF module releases the network resource.
  • Step 256 After the RACF module releases the network resource, the RACF module sends a response message to the service control module.
  • step 204 after the service control module receives the live broadcast request, it needs to perform authentication and authentication, and is divided into two alternatives: the live control request of the service control module to the IPTV terminal is authenticated and authenticated according to the user information of the terminal. If yes, the process proceeds to the next step. If not, the error message is returned to the IPTV terminal and the live broadcast is exited.
  • the service control module forwards the authentication and authentication request of the IPTV terminal to the IPTV application module, and the IPTV application module sends the result of the authentication and authentication to the IPTV application module.
  • the service control module if it passes, enters the next step. If it fails, it returns to the IPTV terminal error message and then exits the live broadcast. Step 228 and step 230 may also be completed after step 234.
  • the content delivery and storage module cyclically stores the live content stream.
  • This module is set internally by the system and is a prerequisite for the IPTV terminal to have a time shift function.
  • the IPTV terminal requests the multicast control/multicast replication point to exit the multicast channel, and may also perform the live program stream and the time shift program between step 236 and step 238. Smooth switching of streams. Another method of the present invention is described below with reference to FIG. As shown in FIG.
  • step S302 the IPTV terminal establishes an RTSP link with the service control module, and the service control module establishes an RTSP link with the content delivery and storage module according to the URL information of the content delivery and storage module;
  • step S304 after the IPTV terminal sends the time shift program request to the service control module, the service control module requests the content delivery and storage module to request the time shift program; then, in step S306, the content delivery and storage module to the IPTV terminal Send RTSP time-shifted program stream.
  • the method further includes: after receiving the live broadcast request from the IPTV terminal, the service control module interacts with the NACF to obtain location information of the IPTV terminal in the network; and the service control module receives the location of the IPTV terminal returned by the NACF.
  • the service control module interacts with the content delivery control module to retrieve the URL information of the content delivery and storage module providing the live channel service; and the service control module interacting with the RACF module to: ⁇ RACF allocates network resources and returns a live broadcast to the IPTV terminal
  • the content of the channel service is delivered with the URL information of the storage module.
  • the IPTV terminal interacts with the content delivery and storage module through the service control module to end the time-shifted program stream, and the service control module notifies the IPTV terminal that the time shift is over.
  • the service control module interacts with the RACF to release the network resources; and the service control module interacts with the content delivery and storage module to release the distribution resources. Therefore, the method of the present invention is fully integrated into the next generation network architecture (NGN IMS or NGN non-IMS).
  • NGN IMS next generation network architecture
  • NGN non-IMS next generation network architecture

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

Abstract

L'invention porte sur un procédé de décalage temporel pour un système de télévision sur protocole Internet (IPTV) sur des réseaux de prochaine génération. Le procédé comprend les opérations suivantes : après l'envoi d'une requête de service en direct, un terminal IPTV interagit avec d'autres fonctions afin d'acquérir ses informations d'emplacement de réseau et les informations URL de fonctions de distribution et de stockage de contenu qui fournissent des services de canal en direct. Le terminal IPTV établit une connexion RTSP avec des fonctions de commande de service, et les fonctions de commande de service établissent une connexion RTSP avec les fonctions de distribution et de stockage de contenu. Les fonctions de distribution et de stockage de contenu fournissent un flux de contenu en direct au terminal IPTV. Après que le terminal IPTV a envoyé une requête de décalage temporel du programme aux fonctions de commande de service, les fonctions de commande de service demandent le programme décalé temporellement aux fonctions de distribution et de stockage de contenu. Le terminal IPTV demande de quitter le canal de multidiffusion. Les fonctions de distribution et de stockage de contenu transmettent le flux de programme décalé temporellement RTSP au terminal IPTV.
PCT/CN2007/003979 2007-10-30 2007-12-29 Procédé de décalage temporel pour un système iptv sur des réseaux de prochaine génération WO2009055988A1 (fr)

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CN200710164347XA CN101426124B (zh) 2007-10-30 2007-10-30 下一代通信网络中交互式网络电视***的时移方法
CN200710164347.X 2007-10-30

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CN101621545B (zh) * 2009-07-07 2012-11-14 中兴通讯股份有限公司 一种实现向终端设备下拉媒体资源的装置及方法
CN101795279A (zh) * 2010-01-25 2010-08-04 青岛海信电器股份有限公司 网络电视机的管理方法和***及网络电视机
CN101877779A (zh) * 2010-05-25 2010-11-03 中兴通讯股份有限公司 一种交互式网络电视iptv***、时移播放控制方法及装置
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