WO2013152489A1 - Système et procédé pour distribuer un programme en direct dans plusieurs domaines - Google Patents

Système et procédé pour distribuer un programme en direct dans plusieurs domaines Download PDF

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Publication number
WO2013152489A1
WO2013152489A1 PCT/CN2012/073887 CN2012073887W WO2013152489A1 WO 2013152489 A1 WO2013152489 A1 WO 2013152489A1 CN 2012073887 W CN2012073887 W CN 2012073887W WO 2013152489 A1 WO2013152489 A1 WO 2013152489A1
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WO
WIPO (PCT)
Prior art keywords
module
relay
live
data stream
live program
Prior art date
Application number
PCT/CN2012/073887
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English (en)
Chinese (zh)
Inventor
王劲林
刘磊
邓浩江
徐剑
Original Assignee
中国科学院声学研究所
北京海力汇通数字系统技术有限公司
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.)
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Application filed by 中国科学院声学研究所, 北京海力汇通数字系统技术有限公司 filed Critical 中国科学院声学研究所
Priority to PCT/CN2012/073887 priority Critical patent/WO2013152489A1/fr
Publication of WO2013152489A1 publication Critical patent/WO2013152489A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/218—Source of audio or video content, e.g. local disk arrays
    • H04N21/2187—Live feed
    • 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
    • H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/765—Media network packet handling intermediate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04N21/637—Control signals issued by the client directed to the server or network components

Definitions

  • the present invention relates to the field of data communications, and in particular, to a system and method for providing live programs across domains. Background technique
  • Live broadcast refers to the broadcast of videos, audio and graphics on a point-to-point basis for the majority of users to receive and watch.
  • Providing live broadcasts across domains means that cable operators provide live programs across administrative domains. For example, Gehua Cable Operators in Beijing provides local live broadcasts from Beijing across their management domains to the management domain of Eastern Cable Operators in Shanghai. Enables users of Eastern cable operators to watch live local programs in Beijing.
  • the live program provider converts the live program based on the DVB standard into an IPdntemet Protocol) live program data stream, and sends it to the live program receiver, and the live program receiver receives the IP live program data stream, and
  • the IP live program data stream is converted into a live program based on the DVB standard and input to the front end system of the live program receiver as a program source, and the live program receiver provides a live program service for its management domain user through broadcast or interactive manner.
  • the live program provider provides the live program service directly to the user of the live program receiver based on the IP network.
  • the live program provider converts the live program based on the DVB standard into an IP live program data stream, inputs it to the media server, and records the live program EPG information into the portal system, and the live program receiver user browses through the IP network.
  • the live program provider's portal system obtains live program information, and the live program information is used as a parameter to request the live program provider's media server to obtain an IP-based live program data stream.
  • multicast technology when transmitting live program data streams over an IP network, it also involves techniques used to achieve data dissemination.
  • multicast technology has the advantage of reducing network traffic and increasing the speed of propagation.
  • IGMP Internet Group Management Protocol
  • the existing broadband IP networks do not all support the multicast routing protocol. Therefore, unicast transmission is adopted on the WAN.
  • the live stream data stream is more practical.
  • the object of the present invention is to overcome the shortcomings of the existing system and method for providing live programs across domains, such as poor scalability, management confusion, and large bandwidth consumption, thereby providing a scalability, easy management, and low bandwidth consumption.
  • the present invention provides a system for providing a live program across domains, including a live data stream providing module, a live stream receiving module, a relay management module, a relay module, a first relay management interface module, and a system.
  • a relay management interface module the live data stream providing module and the first relay management interface module are located in a live program providing domain, and the relay management module and the relay module are located in a live program relay domain, and the live data stream is The receiving module and the second relay management interface module are located in the live broadcast receiving domain;
  • the live data stream providing module is configured to provide a live program data stream
  • the live data stream receiving module is configured to receive the live program data stream
  • the relay management module is configured to select at least one relay module from the relay module, and forward information of the selected relay module to the first relay management interface module or the a second relay management interface module;
  • the relay module is configured to receive program data from the live data stream providing module and send data to the direct data stream receiving module;
  • the first relay management interface module is configured to send a relay request to the relay management module and receive relay information from the module;
  • the second relay management interface module is configured to receive relay information from the relay management module.
  • the live program data stream provided by the live data stream providing module is based on an IP communication protocol
  • the live program data stream based on the IP communication protocol is converted by a live program based on the DVB standard, or obtained by using a collection method. It can be obtained by streaming files, or by copying and forwarding IP live program data streams.
  • the relay module has one or more.
  • the multiple relay modules are connected to each other, and the networking mode includes a cascade network.
  • the live data stream providing module can be a DVB-IP gateway, and the DVB-IP gateway demultiplexes the digital live stream of the input of the ASI interface of the cable television network into MPEG-2 TS. /UDP live program data stream.
  • the live data stream receiving module can further perform processing including shaping, error correction, multiplexing, and demultiplexing on the received live program data stream.
  • the present invention also provides a method for implementing cross-domain live broadcast on a system for providing live programs across domains. Includes:
  • the transmitting the live program data from the live program providing domain to the live program relay domain includes:
  • Step 101) The first relay management interface module sends a live program uplink relay request to the relay management module, where the uplink relay request includes at least an IP and a port of the live data stream providing module, and a live program.
  • Step 102) after receiving the live relay uplink relay request, the relay management module selects at least one relay module;
  • Step 103) the relay management module sends a request for receiving a live program data stream to the relay module selected in step 102), where the request includes at least an IP and port of the live data stream providing module, and an identifier of the live program;
  • the relay management module sends uplink relay information to the first relay management interface module according to the information of the selected relay module, where the uplink relay information includes the selected relay module in step 102) Destination IP, destination port;
  • Step 105) the live data stream providing module configures the uplink relay information, and then sends the live program data stream to the destination IP and the destination port of the selected relay module according to step 102) included in the uplink relay information. Step 102) the selected relay module;
  • Step 106), step 102) The selected relay module monitors and receives the live program data stream.
  • step 105 before the live data stream providing module sends the live program data stream to the selected relay module in step 102), one or more of the following operations are also performed. : establishing an end-to-end secure channel between the live data stream providing module and the selected relay module in step 102), reviewing, encrypting, and inserting a digital watermark on the data stream to be transmitted.
  • the live data stream providing module (1001) configures the uplink relay information, and the first relay management interface module (1005) notifies the uplink relay information by the instruction.
  • the relay module when the relay module is selected, the relay module is selected according to a minimum delay policy or a relay module minimum load policy or a maximum remaining bandwidth policy connected to the relay module.
  • the transmitting the live program data from the live program relay domain to the live program receiving domain includes:
  • Step 201) the second relay management interface module sends a live program downlink relay request to the relay management module, where the downlink relay request includes at least a destination IP and a destination port of the live data stream receiving module, Live program identification;
  • Step 202 after receiving the downlink relay request of the live program, the relay management module selects at least one relay module;
  • Step 203) The relay management module sends downlink relay information to the second relay management interface module according to the information of the relay module selected in step 202), where the downlink relay information includes at least step 202. IP and port information of the selected relay module;
  • Step 204) The relay management module sends a request for copying and forwarding the live program data stream corresponding to the live program identifier to the selected relay module, where the copy forwarding request includes at least an identifier of the live program and a live stream receiving The destination IP and destination port of the module;
  • Step 205 determining whether the selected relay module in step 202) has received the live program data stream, and if it has been received, performing the next step; otherwise, the selected relay module acquires in step 202) Determining the live program data stream corresponding to the identifier of the live program, and then performing the next step;
  • the relay module selected in step 206) and step 202) copies and forwards the live program data stream to the module according to the destination IP and the destination port of the live data stream receiving module.
  • the relay module selected in step 202) may perform one or more of the following operations before copying and forwarding the live program data stream to the live data stream receiving module. :
  • the end-to-end secure channel is established between the selected relay module and the live data stream receiving module in step 202), and the data stream to be transmitted is audited, encrypted, and inserted into the digital watermark.
  • the relay module when the relay module is selected, the relay module is selected according to a minimum delay policy or a relay module minimum load policy or a maximum remaining bandwidth policy connected to the relay module.
  • the system for providing live programs across domains of the present invention has the advantages of good scalability, easy management, and low bandwidth consumption.
  • FIG. 1 is a schematic diagram of a system for providing live programs across domains in the prior art
  • FIG. 2 is a schematic diagram of another system for providing live programs across domains in the prior art
  • FIG. 3 is a schematic diagram of a system for providing live programs across domains according to the present invention.
  • FIG. 4 is a flow chart of the live program providing domain transmitting the live program to the live program relay domain in the present invention
  • FIG. 5 is a flowchart of the live program receiving domain requesting the live program relay domain to obtain a live program according to the present invention
  • Figure 7 is a schematic diagram of a network with multiple domains in one embodiment. detailed description
  • the system for providing live programs across domains includes a live data stream providing module 1001, a live stream receiving module 1002, a relay management module 1003, a relay module 1004, a first relay management interface module 1005, and a The second relay management interface module 1105; wherein the live broadcast data stream providing module 1001 and the first relay management interface module 1005 belong to the live broadcast program providing domain A, the live broadcast data stream receiving module 1002, and the second relay management
  • the interface module 1105 belongs to the live broadcast receiving domain B, and the relay management module 1003 and the relay module 1004 belong to the live broadcast relay domain.
  • the above modules can be connected to each other via a network.
  • the live data stream providing module 1001 is configured to provide a live program data stream. Since the live program data stream needs to be transmitted across domains, and the current data transmission between different domains is usually based on an IP communication protocol, the live program data stream provided by the live data stream providing module 1001 is based on IP communication. Agreement.
  • the IP-based live program data stream provided by the live data stream providing module 1001 may be converted from a live program based on the DVB standard, such as a DVB-IP gateway; or may be obtained through an acquisition method, such as a real-time recording device,
  • the real-time monitoring device may also be obtained by streaming files, such as a media server, or may be generated by copying and forwarding IP live program data streams; it may also be other possible ways in the prior art.
  • FIG. 3 there may be a plurality of them in actual applications. These live data stream providing modules can send data to the relay module separately.
  • the live data stream receiving module 1002 is configured to receive a live program data stream. As a preferred mode, the module can also perform processing including shaping, error correction, multiplexing, and demultiplexing on the received live program data stream, and the result of the processing can be used as a live program signal source.
  • the front end system of the cable television network input to the live program receiving domain (the front end system is not labeled in Figure 3).
  • the live program data stream received by the live data stream receiving module 1002 is based on an IP communication protocol. According to the needs of the user, the live program data stream based on the IP communication protocol can be converted into a data stream based on the DVB standard and then transmitted to the user. The terminal, or directly forwarded to the user terminal. In Fig. 3, only one of the live stream receiving modules 1002 is shown, but there may be more than one in actual applications. These live data stream receiving modules can receive and process data from the relay module, respectively.
  • the relay management module 1003 is configured to select a relay module and forward the information of the selected relay module to the first relay management interface module 1005 or the second relay management interface module 1105.
  • the relay module 1004 is configured to receive program data from the live data stream providing module 1001, and send data to the live data stream receiving module 1002. Although only one of the relay modules 1004 is shown in Fig. 3, there may be actually more than one. When there are more than one of the Trunking Modules, the Trunking Modules can be connected to each other.
  • the networking modes include, but are not limited to, cascading networking, P2P networking, single ring networking, and dual ring redundancy networking.
  • the first relay management interface module 1005 is configured to send a relay request to the relay management module 1003. And receiving the relay information from the module, and further configuring, by the live data stream providing module 1001, the relay information.
  • the second relay management interface module 1105 is configured to receive the relay information from the relay management module 1003, and configure the relay information for the live data stream receiving module 1002.
  • the system of the present invention includes a live program providing domain, a live broadcast receiving domain, and a direct broadcast relay domain.
  • the live program providing domain sends the live program data stream to the live program relay domain through the IP network, and then the live program relay domain receives the domain according to the live program. Requesting to relay the live program data stream to the live program receiving domain through the IP network.
  • FIG. 4 The specific process of the live program providing domain to send the live program to the live program relay domain is shown in FIG. 4, including:
  • the IP and port of the module 1001, the identification of the live program, and the like are provided.
  • the relay module is selected, there is a certain selection policy.
  • the relay module is selected according to a strategy that the distance data stream providing module 1001 has a minimum delay.
  • other selection strategies may be employed, including the minimum load of the relay module, the maximum remaining bandwidth connected to the relay module, and the like.
  • the selected relay module may be one or multiple.
  • Step 103) The relay management module 1003 sends a request for receiving the live program data stream to the selected relay module, where the request includes the IP and port of the live data stream providing module 1001, the identifier of the live program, and the like.
  • the TCP protocol may be adopted.
  • other communication protocols may be employed.
  • Step 104 the relay management module 1003 sends uplink relay information to the first relay management interface module 1005 according to the information of the selected relay module, where the uplink relay information includes the purpose of the previously selected relay module. IP, destination port.
  • the relay management module 1003 sends the uplink relay information to the first relay management interface module 1005
  • the HTTP protocol is adopted.
  • other communication protocols may be employed.
  • Step 105) the received uplink relay information is configured to the live data stream providing module 1001, and the live data stream providing module 1001 selects, according to the destination relay IP of the selected relay module included in the uplink relay information, The destination port sends an IP-based live program data stream to the relay module.
  • the received uplink relay information is configured to be operated by the live data stream providing module 1001. It can be implemented by the first relay management interface module 1005 or manually by an administrator.
  • the live data stream providing module 1001 may adopt a UDP or RTP protocol when transmitting the live program data stream to the relay module.
  • the selected relay module can be one or more.
  • the live data stream providing module 1001 needs to send a live program data stream to each of the selected plurality of relay modules.
  • the live data stream providing module 1001 may perform one or more of the following operations before sending the live program data stream to the destination relay module: establishing between the live data stream providing module 1001 and the destination relay module.
  • An end-to-end secure channel that audits, encrypts, and inserts digital watermarks on the data stream to be transmitted.
  • Step 106 the selected relay module 1004 listens on the destination port and receives the live program data stream.
  • UDP or RTP protocols can be used.
  • FIG. 5 shows a processing flow of a live program receiving domain requesting a live program relay domain to obtain a live program, including:
  • Step 201) the second relay management interface module 1105 sends a live program downlink relay request to the relay management module 1003 of the live program relay domain by using the HTTP protocol, and the downlink relay request includes the purpose of the live data stream receiving module 1002. IP and destination port, live program identification.
  • the HTTP protocol may be adopted.
  • other communication protocols may be employed.
  • the relay module when the relay module is selected, there is a certain selection policy.
  • the relay module is selected according to the minimum delay strategy of the live data stream receiving module. In other embodiments, other selection strategies may be employed, including the minimum load of the relay module, the maximum remaining bandwidth connected to the relay module, and the like.
  • the selected relay module can be one or multiple.
  • the relay module selected in this step does not necessarily have an inevitable connection with the relay module selected in step 102).
  • the relay module selected in this step may be the relay module selected in step 102), or may not be.
  • Step 203) The relay management module 1003 sends downlink relay information to the second relay management interface module 1105 according to the information of the relay module selected in step 202), where the downlink relay information includes the selected IP and port information for the trunk module.
  • Step 204 the relay management module 1003 sends a request for copying and forwarding the live program identifier corresponding to the live program data stream to the selected relay module by using the TCP protocol, where the copy forwarding request includes at least the identifier of the live program and the live stream.
  • Step 202) mentions that one or more selected relay modules, when there are multiple selected relay modules,
  • the relay management module 1003 sends a request for copying and forwarding the live program identification corresponding to the live program data stream to the relay modules.
  • Step 205 determining whether the selected relay module in step 202) has received the live program data stream, and if it has been received, performing the next step; otherwise, the selected relay module in step 202) is from the other
  • the relay module acquires a live program data stream corresponding to the identifier of the live program, and then performs the next step.
  • the relay module selected in step 202) is not necessarily in contact with the selected relay module in step 102), and the selected relay module in step 202) may be in step 102).
  • the selected relay module may or may not be, and in the previous step 106), the live program data stream is sent to the selected relay module in step 102). Therefore, in this step, if the selected relay module in step 202) is the same as the relay module selected in step 102), it means that the selected relay module in step 202) has received the live program data stream.
  • the next step may be directly performed. If the selected relay module in step 202) is different from the selected relay module in step 102), it means that the selected relay module in step 202) has not received the live program data stream. You need to get the live program data stream before proceeding to the next step.
  • the relay module selected in step 206) and step 202) copies and forwards the live program data stream to the module according to the destination IP address and the destination port of the live data stream receiving module 1002 by using the UDP or RTP protocol.
  • the relay module may also perform one or more of the following operations before copying and forwarding the live program data stream to the live stream receiving module 1002: establishing an end-to-end secure channel between the relay module and the live stream receiving module 1002 , review, encrypt, and insert digital watermarks on the data stream to be transmitted.
  • the system of the present invention includes: a live data stream providing module 2001, a live stream receiving module 2002, a relay management module 2003, a first relay module 2004, and a second relay module 2104.
  • the first relay management interface module 2005, the second relay management interface module 2105, and the IPQAM 2102. can be connected to each other via a network.
  • the above system can be divided into a live program providing domain, a live broadcast receiving domain, and a live broadcast relay domain.
  • the live broadcast program providing domain A includes a relay management interface module 2005 and a live data stream providing module 2001;
  • the live broadcast receiving domain B includes a relay management interface module 2105, a live stream receiving module 2002, and an IPQAM 2102;
  • the relay management module 2003, the first relay module 2004, and the second relay module 2104 are included.
  • the live data stream providing module is a DVB-IP gateway, which is used for demultiplexing the digital live stream of the ASI interface input of the cable television network, converting it into an MPEG-2 TS/UDP live program data stream, and transmitting the data stream to the live stream.
  • Each relay module in the program relay domain is used for demultiplexing the digital live stream of the ASI interface input of the cable television network, converting it into an MPEG-2 TS/UDP live program data stream, and transmitting the data stream to the live stream.
  • Each relay module in the program relay domain is used for demultiplexing the digital live stream of the ASI interface input of the cable television network, converting it into an MPEG-2 TS/UDP live program data stream, and transmitting the data stream to the live stream.
  • the live data stream receiving module 2002 copies and forwards the live program data stream to the IPQAM 2102, and the IPQAM 2102 multiplexes and modulates the received live program data stream.
  • the cable television network sent to the live program receiving domain is received by the terminal.
  • the specific steps of the live program providing domain to send the live program to the live program relay domain live program data stream include:
  • Step 3002) the relay management module 2003 selects the first relay module 2004 according to the distance live data stream providing module 2001 minimum delay policy.
  • Step 3003 the relay management module 2003 sends a request for receiving the live program data stream to the first relay module 2004 by using the TCP protocol, where the request includes the IP and port of the live data stream providing module 2001, and the identifier of the live program.
  • Step 3004) the relay management module 2003 sends the selected uplink relay information to the first relay management interface module 2005 by using the HTTP protocol, and the URL of the request is "http://IP address of the first relay management interface module 2005".
  • Step 3005) The first relay management interface module 2005 uses the TCP protocol to request the live data stream providing module 2001 to send a live program data stream, where the request includes a live program identifier, a destination IP, and a destination port.
  • Step 3006 the live data stream providing module 2001 and the first relay module 2004 send the live program data stream to the first relay module 2004 by using the UDP protocol on the DTLS (Datagram Transport Layer Security) secure transport layer or IPsec.
  • DTLS Datagram Transport Layer Security
  • Step 3007) the first relay module 2004 listens on the destination port and receives the live program data stream by using the UDP protocol on the secure connection.
  • the specific step of the live program receiving domain requesting the live program relay domain to obtain the live program includes: Step 4001), the second relay management interface module 2105 of the live program receiving domain uses the HTTP protocol to relay to the live program relay domain.
  • Step 4002) the relay management module 2003 selects the second relay module 2104 according to the principle of the distance live data stream receiving module 2002;
  • Step 4004 the relay management module 2003 notifies that the selected second relay module 2104 obtains the live program data stream from the first relay module 2004 having the live program data stream, and the relay management module 2003 uses the TCP protocol to The selected relay module 2104 sends a request for copying and forwarding the live program identifier 123456 to the live program data stream, where the copy forwarding request information includes a live program identifier, a destination IP, and a destination port;
  • Step 4005) the second relay module 2104 and the live data stream receiving module 2002 send the live program data stream to the live stream receiving module 2002 by using the UDP protocol on the DTLS secure transport layer.
  • the live data stream receiving module 2002 copies and forwards the live program data stream to the IPQAM 2102, and the IPQAM 2102 modulates the live program data stream and broadcasts it to the user terminal.
  • the above is a description of the system and related methods for providing live programming across domains of the present invention. Since the system uses a live program relay domain to manage and relay live streams provided by multiple domains between multiple management domains, the system is scalable and easy to grow in the number of management domains and live programs. management.

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

Abstract

La présente invention concerne un système pour distribuer un programme en direct dans plusieurs domaines. Le système comprend un module de fourniture de flux de données en direct, un module de réception de flux de données en direct, un module de gestion de relais, des modules de relais ainsi qu'un premier et un second module d'interface de gestion de relais. Le module de fourniture de flux de données en direct est utilisé pour fournir un flux de données de programme en direct; le module de réception de flux de données en direct est utilisé pour recevoir le flux de données de programme en direct; le module de gestion de relais est utilisé pour sélectionner au moins un des modules de relais et pour transmettre les informations du module de relais au premier ou au second module d'interface de gestion de relais; le module de relais est utilisé pour recevoir les données de programme du module de fourniture de flux de données en direct et pour transmettre les données de programme au module de réception de flux de données en direct, le premier module d'interface de gestion de relais est utilisé pour transmettre une demande de relais au module de gestion de relais et pour recevoir des informations de relais; et le second module d'interface de gestion de relais est utilisé pour recevoir les informations de relais provenant du module de gestion de relais.
PCT/CN2012/073887 2012-04-12 2012-04-12 Système et procédé pour distribuer un programme en direct dans plusieurs domaines WO2013152489A1 (fr)

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CN101626387A (zh) * 2009-08-12 2010-01-13 中兴通讯股份有限公司 媒体业务处理系统、方法及终端
US20120036215A1 (en) * 2010-08-04 2012-02-09 Laura Perryman Optimized Data Stream Upload

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