WO2004098125A1 - Systeme de conference multimedia distribue fonde sur web ip - Google Patents

Systeme de conference multimedia distribue fonde sur web ip Download PDF

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Publication number
WO2004098125A1
WO2004098125A1 PCT/CN2003/001080 CN0301080W WO2004098125A1 WO 2004098125 A1 WO2004098125 A1 WO 2004098125A1 CN 0301080 W CN0301080 W CN 0301080W WO 2004098125 A1 WO2004098125 A1 WO 2004098125A1
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WO
WIPO (PCT)
Prior art keywords
gatekeeper
user
control unit
multimedia conference
conference
Prior art date
Application number
PCT/CN2003/001080
Other languages
English (en)
Chinese (zh)
Inventor
Sheng An Wang
Original Assignee
Sheng An Wang
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 Sheng An Wang filed Critical Sheng An Wang
Priority to AU2003289613A priority Critical patent/AU2003289613A1/en
Publication of WO2004098125A1 publication Critical patent/WO2004098125A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
    • H04L12/1827—Network arrangements for conference optimisation or adaptation
    • 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
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences
    • H04L65/4038—Arrangements for multi-party communication, e.g. for conferences with floor control
    • 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
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences
    • H04L65/4046—Arrangements for multi-party communication, e.g. for conferences with distributed floor control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/50—Telephonic communication in combination with video communication

Definitions

  • the invention relates to a multimedia conference system running in an IP service-supporting network, and in particular adopts distributed processing technology to realize a large-capacity multimedia conference system.
  • the system is suitable for a multipoint system, that is, a plurality of conferences located in different places.
  • a system for implementing a multimedia conference function is also suitable for a point-to-point system, that is, a system in which multimedia communication is performed by two parties located in different places. Background technique
  • the multimedia conference system connects a plurality of remotely located multimedia conference terminals through a communication network. Under the control of a multipoint control unit, participants are allowed to communicate in multimedia modes such as image, voice, and data.
  • Multimedia conference system includes multimedia conference terminal and multipoint control unit
  • Multi-point Control Unit MCU
  • gatekeeper GK
  • Multimedia conference The terminal performs two-way communication with other terminals, multipoint control units and gatekeepers, and supports multimedia communication such as image, voice and data.
  • the multipoint control unit provides control of multiple multimedia conference terminals, and mixes and exchanges images, voice, and data, and supports multipoint conferences between three or more terminals.
  • a multipoint control unit is composed of two function modules: multipoint control (MC) and multipoint processing (MP).
  • Multipoint control provides control of a multipoint conference, and multipoint processing controls multiple channels of video, audio, and data.
  • the signals are processed, and the multipoint processor is controlled by the multipoint controller.
  • the gatekeeper implements the management functions of the system, including user management, conference management, device management, and bandwidth management.
  • the multipoint control unit implements both the multipoint control function and the multipoint processing function. Therefore, the following problems exist:
  • the multipoint processing function is implemented on the multipoint control unit in a centralized manner, the processing load of the multipoint control unit is heavy, especially when there are many system users and multiple conferences are held at the same time, which limits the scale of the system Cannot form a large multimedia conference system;
  • the technical solution of the present invention is to provide a distributed multimedia conference system based on an IP network, and use it to form a large-capacity multimedia conference system, balance the load of system equipment, make reasonable use of network bandwidth resources, and effectively reduce the network load.
  • a distributed multimedia conference system based on an IP network which mainly includes a multimedia conference terminal, a multipoint control unit, and a gatekeeper, and is characterized in that the gatekeeper is divided into a tandem gatekeeper and a multi-gatekeeper.
  • Each user gatekeeper, each user gatekeeper is connected to the multimedia conference terminal and multipoint control unit under its jurisdiction, the tandem gatekeeper is connected to each user gatekeeper, and coordinate each user gatekeeper to manage the entire system;
  • each multimedia conference terminal Communicate with the user's gatekeeper when it is idle.
  • the conference in addition to establishing a communication connection with the user's gatekeeper, it also establishes a communication connection with the multipoint control unit that controls the conference terminal; the multipoint control unit only It has multi-point control function, its multi-point processing function is separated from the multi-point control unit, and the multi-point processing function is realized in each multimedia conference terminal.
  • the gatekeeper is divided into a tandem gatekeeper and a plurality of user gatekeepers, and a plurality of user gatekeepers jointly implement system management functions under the coordination of the tandem gatekeeper;
  • the multipoint processing function is separated from the multipoint control unit and distributed to the conference terminal, that is, the multipoint control unit and each multimedia conference system terminal only exchange control code streams. There is no exchange of information code streams such as audio and video. Information codes
  • the stream is transmitted between the multimedia terminals through the corresponding routing under the control of the multipoint control unit.
  • the present invention sets up multiple multipoint control units to balance the load of the multipoint control unit, which can greatly expand the multimedia conference.
  • the capacity of the system solves the existing set
  • the capacity of Chinese conference system is limited.
  • Multicast is a unique transmission technology in IP networks. It allows one or more senders (multicast sources) to send a single data packet to multiple receivers at one time. A multicast source sends a data packet with a specific multicast address. Only members of the multicast group can receive the data packet. Multicast can greatly save network bandwidth, because no matter how many receivers, only a single data packet is transmitted on any link in the entire network, it improves data transmission efficiency and reduces the possibility of congestion in the backbone network.
  • a plurality of user gatekeepers and tandem gatekeepers can adopt a Chinese-machine hot-scoring method to improve their reliability.
  • FIG. 1 is a schematic diagram of a distributed structure and code stream control of a centralized multimedia conference system in the prior art
  • FIG. 2 is a schematic diagram of a logical structure distribution of the present invention
  • FIG. 3 is a schematic diagram of code stream control according to the present invention.
  • FIG. 4 is a schematic diagram of a communication process between devices of the present invention.
  • FIG. 5 is a block diagram of the structure of a multimedia conference terminal according to the present invention.
  • FIG. 6 is a principle block diagram of a multipoint control module and a gatekeeper in the multimedia conference terminal in FIG. 5;
  • FIG. 7 is a structural topology diagram of an embodiment of the present invention. detailed description
  • the present invention is cascaded by a tandem gatekeeper 101, multiple user gatekeepers 1021-102 ⁇ (n greater than or equal to 2), and multiple multipoint control units MCU 1031-103 ⁇ ( ⁇ greater than or equal to 2). It is composed of multiple multimedia conference terminals 1041 to 104 ⁇ ( ⁇ is greater than or equal to 2), the tandem gatekeeper 101 establishes a communication connection with each user gatekeeper 10 ⁇ -102 ⁇ , and coordinates the user gatekeeper 1021-102 ⁇ .
  • each user gatekeeper 1021-102 ⁇ is responsible for managing the corresponding multimedia conference terminals 1041-104 ⁇ and the multipoint control unit MCU 1031-103 ⁇ , and establishes a two-way communication connection; each multimedia terminal 1041-104 ⁇ is in Establish a two-way communication connection with the user gatekeeper 1021-102 ⁇ when it is idle.
  • each multimedia conference terminal 1041-104 ⁇ also has a multi-point processing MP function, that is, the audio and video signals transmitted by other terminals can be processed for multi-screen, mixing, and mixing speed.
  • Multi-point control unit MCU controls the conference terminals 1041-104 ⁇ during the multi-point conference, switches the image and voice signals, and implements the multi-point control MC function.
  • Multiple MCUs can be set in the system to achieve load balancing.
  • the multimedia conference terminal 104n which is a broadcast venue, performs bidirectional communication with other terminals 1041-104 ⁇ -1, the multipoint control unit 103 ⁇ , which controls the conference, and the user gatekeeper 1026 to which it belongs.
  • the multipoint processing MP function is added, that is, the audio and video signals transmitted by other terminals can be processed for multi-screen and mixing, and the multimedia conference terminal 104 ⁇ , which is a broadcast venue, also Multicast transmission of audio and video code streams to other terminals 1041-104 ⁇ -1, as shown by the solid line in FIG.
  • the multipoint control unit 103 ⁇ is only responsible for controlling the exchange of code streams, as shown by the dotted line in FIG. 3, which does not exist
  • the exchange of audio and video code streams greatly reduces the processing load of the multipoint control unit 103 ⁇ .
  • each multimedia conference terminal 1041-104 ⁇ mainly includes a video source 401, an audio source 402, an audio-video input interface 403, an audio-video encoding 408, an audio-video decoding 409, and an audio-video output interface 4 ( ⁇ , sound reinforcement equipment).
  • the display device 406, the network interface 410, and the like are characterized in that a multipoint processing function module 407 is added between the audio and video decoding 409 and the audio and video output interface 404, so that each multimedia conference terminal 1041-104 ⁇ also has a multipoint processing MP.
  • the video source 401 and audio source 402 send the image, voice and data signals of the local conference site to the audio and video input interface 403 to the audio and video encoding 408 for compression encoding and other processing and then send them to the IP network through the network interface 410; After receiving various information such as audio and video by the IP network, after the network interface 410 Send to audio and video decoding 409 for decoding and other processing, and restore it to image, voice and data signals, and then multipoint processing 407 to restore the restored image, voice, and data signal to multi-screen, mixing and other processing, and then output through audio and video
  • the interface 404 connects to the sound reinforcement device 405 and the display device 406.
  • the multimedia conference terminals 1041-104 ⁇ After the multimedia conference terminals 1041-104 ⁇ are activated, they first establish a two-way communication connection with the user gatekeepers 1021-102 ⁇ to which they belong. As shown in Figure 3, they apply to the user gatekeepers 1021-102 ⁇ for login.
  • the user gatekeeper authenticates the identity of the terminal. If the terminal passes user authentication, the login is successful and the system can be used; otherwise, the terminal cannot use the system.
  • the user authentication function of the system can ensure the security of system use and prevent unauthorized users from using the system.
  • Each user gatekeeper 1021-102 ⁇ obtains the relevant information of the user during the user authentication process, such as the user identification code, user name, user IP address, etc., and each user gatekeeper 1021-102 ⁇ queries the local database according to the user identification code, and confirms Whether the user is an authorized user. If it is an authorized user, update the relevant information of the user, such as user name, user IP address, user status, and so on.
  • the user gatekeeper uploads the update information of the user to the tandem gatekeeper 101.
  • the tandem gatekeeper 101 dynamically maintains the updated user information database, and then downloads the updated information to other user gatekeepers. status information.
  • the tandem gatekeeper 101 and each user gatekeeper 1021-102 ⁇ can dynamically monitor, update, and manage user status information of the entire system in real time.
  • the process of convening the conference is as follows:
  • the multimedia conference terminal 104n that needs to hold a conference firstly schedules a conference to be held from the user gatekeeper 102 ⁇ as a broadcast conference site.
  • the user inputs conference information through the conference terminal 104n, including information such as conference name, conference start time, conference duration, conference profile, and participating members.
  • the conference terminal 104 ⁇ transmits the conference information to the user gatekeeper 102 ⁇ to which it belongs.
  • the user gatekeeper 102 ⁇ assigns the conference to the conference according to the distribution of participating members in the system and the load of the MCUs in the system.
  • a multipoint control unit MCU controls the conference by the multipoint control unit MCU.
  • the user gatekeeper adds the relevant information of the conference to the local conference information database, and uploads the updated conference information to the tandem gatekeeper 101.
  • Tandem Gatekeeper 101 at the Update System Meeting At the same time as the information database, the updated conference information is transmitted to other user gatekeepers.
  • the tandem gatekeeper 101 and each user gatekeeper 1021-102 ⁇ can dynamically update and maintain conference information of the entire system in real time.
  • the terminal 104n initiating the conference wants to hold a scheduled conference, it first establishes a two-way communication connection with the multipoint control unit MCU of the conference, and the multipoint control unit MCU calls each participating terminal to join the conference. At this time, the multipoint control unit MCU establishes a two-way communication connection with the participating terminals that have joined the conference, as shown by the dashed lines in FIG. 3. After joining the conference, the participating terminals still maintain communication connections with their respective user gatekeepers in order to report changes in terminal status information to the user gatekeepers in real time.
  • the participating terminal active gatekeeper to which the user belongs to the state change report Gen ⁇ 1
  • gatekeeper update the user status of the local user Information, and upload the updated user status information to the tandem gatekeeper 101 at the same time.
  • the tandem gatekeeper 101 updates the system user status information database, and then downloads the updated user status information to other user gatekeepers, ensuring that the user status information of all gatekeepers is updated dynamically and in real time.
  • the multipoint control unit MCU of this conference can control the multipoint conference according to the requirements of the terminal that has the conference control right. For example, the image and sound of a selected site are broadcasted to other sites, and the speaking right is assigned to the required Speaking venue, etc.
  • the multi-point control unit MCU controls multiple participating terminals as a multi-point control MC.
  • the multi-point control unit MCU and the participating terminals must maintain a two-way communication connection and exchange control and response information, as shown in the figure. 3 dashed lines and shown in Figure 4.
  • the multipoint processing units 1031 to 103 ⁇ are composed of a main processor CPU 701, a memory 702, an I / O interface 705, a mass storage medium 704, other physical interfaces 703, and a network interface 706.
  • the multipoint processing function is not implemented on the multipoint control unit MCU, but is implemented on each of the conference terminals 1041 to 104 ⁇ . As shown in FIG. 5, the multipoint processing function is separated from the multipoint control unit MCU. Each of the participating terminals 1041-104 ⁇ realizes a multipoint processing conference. As shown in FIG. 3, in the distributed conference system of the present invention, a multipoint control unit Only the control and response information is exchanged between the MCU and the participating terminals 1041-104 ⁇ .
  • the control and response information occupies a very small bandwidth, and the average value of each channel is on the order of 100b / s. Therefore, the multipoint control unit
  • the communication load and processing load of the MCU are very light. It can support more terminals and form a large-capacity conference system, which solves the problem of limited capacity of the existing centralized conference system.
  • the MCU controlling the multipoint control unit of the conference and the participating terminals 1041-104 ⁇ are disconnected from the communication connection, and the participating terminals 1041-104 ⁇ return to the idle state, and only maintain with the respective user gatekeepers 1021-102 ⁇ Communication connection.
  • the present invention is used to implement a certain multimedia conference system.
  • the system consists of a tandem gatekeeper, a user gatekeeper, a multipoint control unit MCU, multiple multimedia conference terminals, and corresponding routers.
  • the number of user gatekeepers, MCUs, conference terminals, routers, and Ethernet segments is unlimited, and can be two or more.
  • the tandem gatekeeper, user gatekeeper, MCU, conference terminal, and router are connected to the local Ethernet through the Ethernet interface. Each Ethernet segment is connected via an IP transmission network via a router.
  • tandem gatekeeper and the user gatekeeper are independent of the multipoint control unit MCU and the multimedia conference terminal, but can be included in the multipoint control unit MCU and the multimedia conference terminal during physical implementation.
  • the gatekeeper and user gatekeeper software runs on the MCU server of the multipoint control unit. The specific working process of this embodiment is the same as the implementation process described in the above specific implementation.
  • the technical solution of the present invention can also implement a remote teaching system, a remote medical system, and an image monitoring system.
  • the present invention has the following beneficial effects:
  • the gatekeeper is divided into a tandem gatekeeper and multiple user gatekeepers, and the multipoint processing function is separated from the multipoint control unit to implement multipoint on the multimedia conference terminal.
  • Processing functions that is, multi-screen processing, mixing speed, mixing and other functions are implemented by the participating terminals, This greatly reduces the processing load of the multi-point control unit.
  • a single multi-point control unit can hold more meetings at the same time and support more multimedia conference terminal work.
  • the tandem gatekeeper can reasonably allocate the conferences according to the distribution of the entire network of conferences among the multi-point control units, and realize the load balancing function of the multi-point control units.
  • Multicast does not have to be aggregated to the multipoint control unit, and multicast data packets are transmitted to the multimedia conference terminals along the corresponding routes, which saves network bandwidth and avoids network congestion problems that may occur in centralized multimedia conference systems.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un système de conférence multimédia distribué, fondé sur web IP, comprenant essentiellement un terminal de conférence multimédia, une unité de commande multipoint et un portier. Ce système est caractérisé en ce que ledit portier est divisé en portier tandem et en portiers multiutilisateurs. Chaque portier d'utilisateur est connecté aux terminaux de conférence multimédia et à l'unité de commande multipoint gérée par ledit portier d'utilisateur. Le portier tandem est connecté à chaque portier d'utilisateur, les apparie et gère l'ensemble du système. Au cours de la conférence, chaque terminal de conférence multimédia participant à la conférence est également connecté à l'unité de commande multipoint qui commande uniquement la conférence. La fonction de traitement multipoint est séparée de l'unité de commande multipoint et s'effectue au niveau de chaque terminal de conférence multimédia. L'invention concerne également un système de conférence multimédia pouvant assurer la multidiffusion d'images, de voix et de données, de façon à sauvegarder la bande passante du réseau.
PCT/CN2003/001080 2003-04-28 2003-12-17 Systeme de conference multimedia distribue fonde sur web ip WO2004098125A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003289613A AU2003289613A1 (en) 2003-04-28 2003-12-17 Distributed multimedia conference system based on ip web

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03127985.6A CN1272932C (zh) 2003-04-28 2003-04-28 基于ip网络的分布式多媒体会议系统
CN03127985.6 2003-04-28

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WO2004098125A1 true WO2004098125A1 (fr) 2004-11-11

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AU (1) AU2003289613A1 (fr)
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CN102890936A (zh) * 2011-07-19 2013-01-23 联想(北京)有限公司 一种音频处理方法、终端设备及系统
CN104009991A (zh) * 2014-05-28 2014-08-27 广州华多网络科技有限公司 音频通信系统和方法

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CN100542099C (zh) * 2003-11-24 2009-09-16 王生安 一种多点控制单元及其基于ip网的共享方法与会议系统
WO2006123747A1 (fr) * 2005-05-18 2006-11-23 Nippon Telegraph And Telephone Corporation Systeme distribue de serveurs multimedia, procede de distribution d’informations multimedia, programme de celui-ci et support d’enregistrement
CN100544269C (zh) * 2006-07-18 2009-09-23 中兴通讯股份有限公司 一种实现不支持网守的端点设备参加多点会议的方法
CN101707687B (zh) * 2009-11-10 2013-01-16 中兴通讯股份有限公司 一种会议电视业务调度方法和会议电视系统
DE102009057725A1 (de) 2009-12-10 2011-06-16 Siemens Enterprise Communications Gmbh & Co. Kg Signalgebende Vorrichtung, Signalisiervorrichtung, Signalgebungsverfahren sowie Signalisierverfahren
CN102572368A (zh) * 2010-12-16 2012-07-11 中兴通讯股份有限公司 分布式视频的处理方法、系统及多点控制单元
CN102957729B (zh) * 2011-08-26 2015-11-25 中国移动通信集团公司 一种多媒体会议音视频传输方法及设备
CN102843289B (zh) * 2012-08-08 2015-05-27 苏州阔地网络科技有限公司 一种会议漂移方法及系统
CN103313027A (zh) * 2013-06-08 2013-09-18 青岛优视通网络有限公司 一种网络适应能力强的会议终端及实现视讯会议的方法
CN105391969A (zh) * 2015-12-14 2016-03-09 广东亿迅科技有限公司 一种分布式视频会议系统及终端入会的方法
CN105635628A (zh) * 2016-01-22 2016-06-01 深圳市华玺科技有限公司 一种背负式单兵接入视频会议方法及系统
CN108156413B (zh) * 2017-12-28 2021-05-11 中兴通讯股份有限公司 视频会议的传输方法及装置、mcu
CN111372033B (zh) * 2020-04-11 2021-01-19 高邮市新世纪灯具城经营管理有限公司 一种视频会议管理方法及系统
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CN1272932C (zh) 2006-08-30
AU2003289613A1 (en) 2004-11-23
CN1543123A (zh) 2004-11-03

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