WO2007076637A1 - Procede d'utilisation de jetons de presentation h.239 dans un systeme de videoconference a plusieurs etages en serie - Google Patents

Procede d'utilisation de jetons de presentation h.239 dans un systeme de videoconference a plusieurs etages en serie Download PDF

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Publication number
WO2007076637A1
WO2007076637A1 PCT/CN2005/002437 CN2005002437W WO2007076637A1 WO 2007076637 A1 WO2007076637 A1 WO 2007076637A1 CN 2005002437 W CN2005002437 W CN 2005002437W WO 2007076637 A1 WO2007076637 A1 WO 2007076637A1
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WO
WIPO (PCT)
Prior art keywords
conference
terminal
level
message
presentation
Prior art date
Application number
PCT/CN2005/002437
Other languages
English (en)
Chinese (zh)
Inventor
Zheng Ma
Jinghai Chen
Ziming Jin
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2005/002437 priority Critical patent/WO2007076637A1/fr
Publication of WO2007076637A1 publication Critical patent/WO2007076637A1/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
    • H04N7/152—Multipoint control units therefor

Definitions

  • the present invention relates to the field of conference television, and in particular to a method for how to use a H239 presentation token in a multi-level cascade (three or more cascade) conference television system. Background technique
  • a multi-level cascaded conference mode is generated.
  • the next-level MCU Multipoint Control Unit
  • the next-level MCU is a terminal, and the MCU of the upper-level conference assigns a unique TerminalLabel (terminal number) as the identifier.
  • the MCU of the next-level conference is an MCU, which manages all the terminals in the next-level conference, and assigns a unique TerminalLabel as the identifier to all terminals in the next-level conference, and manages the next-level conference. Terminal list. Therefore, the upper-level meeting and the lower-level meeting each have an independent terminal list, and the MCU in the upper-level meeting and the MCU in the lower-level meeting independently manage their respective meetings.
  • the H.239 agreement specifies how to deliver a second, or even more, video image in a conference.
  • a terminal with a presentation token can send a second video, and other terminals watch a second video of the terminal. In this way, the MCU needs to manage the H239 presentation token.
  • the H239 presentation token can be used in this way, that is, the upper conference and the lower conference each use the H239 presentation token in the conference, and do not interfere with each other.
  • the upper and lower conferences look at the other party's second video, they must first apply for the H239 presentation token, but they all have their own independent H239 presentation tokens, so they will never make a token request to the other party. If there is no token, naturally the second video cannot be sent, so that they will not see each other's second video.
  • the MCU hereinafter referred to as the lower-level MCU
  • a method for using a H239 presentation token in a multi-stage cascaded conference television system which is executed on a lower-level multi-point control unit of three or more cascades, wherein the conference has only one set of H239 presentation tokens.
  • the lower-level multipoint control unit changes the terminal number value in the H239 presentation message to the terminal number assigned to the lower-level conference.
  • the lower-level multipoint control unit Change the terminal number value in the H239 presentation message to the terminal number assigned to it by the upper-level conference, and the terminal holding the H239 presentation token to send the second-channel video.
  • the method further includes the following steps:
  • the lower-level multipoint control unit When receiving the H239 presentation message sent by the superior conference, the lower-level multipoint control unit processes itself as a terminal of the superior conference;
  • the lower multipoint control unit treats itself as the multipoint control unit of the conference.
  • the holding terminal of the H239 presentation token is a cascade port that is cascaded with the upper-level conference
  • the current terminal variable is equal to the terminal number assigned by the upper-level subordinate
  • the terminal variable currently held is the terminal number of the specific terminal.
  • the method further includes the steps of:
  • the method further includes:
  • the lower multipoint control unit directly returns the agreed response message to the superior.
  • the cascading port of the conference while forcibly depriving the H239 demo token of the H239 presentation token holding terminal in this conference.
  • the method further includes:
  • the terminal number value in the request message is saved in the current application terminal variable. After converting the terminal number in the message to the terminal number assigned by the superior to the lower level, the terminal number is forwarded to the terminal holding the token, and the terminal decides whether to agree to release the H239 presentation token.
  • the method further includes:
  • the lower multipoint control unit receives the response message from the cascade interface that is cascaded with the upper conference.
  • the terminal number in the response message is equal to the terminal number assigned by the upper level to the lower level, and the current application terminal variable is greater than 0, the terminal number in the message is converted into the current application terminal variable, and the terminal is in the current conference. The number is equal to the terminal that is currently applying the terminal variable for forwarding.
  • the method further includes:
  • the lower multipoint control unit receives the release message or the indication message from the cascade interface that is cascaded with the upper conference, and the release message or After the terminal number in the indication message is converted to the terminal number assigned by the upper level, the terminal number is forwarded to each participant terminal in the conference.
  • the subordinate multipoint control unit receives the release message from the ⁇ 239 demo token holding terminal, and forwards it to the cascading port cascaded with the upper conference.
  • the terminal number in the message is converted to the terminal number assigned to the lower level and then forwarded.
  • the terminal number does not need to be converted and can be directly forwarded.
  • the invention provides a method for using the ⁇ 239 demo token in a multi-level cascade conference television system.
  • a multi-level cascade conference is held, only one set of 239 demo tokens needs to be managed in the entire conference, and the whole
  • the broadcast source of the second video of the conference is also unique, so there is no problem that the broadcast source of the second video in the entire conference is not uniform.
  • Figure 1 is a block diagram of a specific embodiment of the method of the present invention.
  • FIG. 2 is a flow chart of processing a received PresentationTokenRequest message by a lower-level MCU in the present invention
  • FIG. 3 is a flow chart of processing a received PresentationTokenResponse message by a lower-level MCU in the present invention
  • the H239 presentation token related method in the multi-level cascade conference of the present invention is as follows: in a multi-level cascade conference, only one set of H239 presentation tokens is provided, and the terminal having the H239 presentation token can send the second channel video.
  • the lower-level MCU in the multi-level cascade conference assumes the role conversion task during the processing of the H239 presentation token related message, that is, the H239 presentation message, that is, receives the H239 presentation message sent by the upper-level conference, and the lower-level MCU uses itself as a terminal.
  • the processing is performed; the H239 presentation message sent by the terminal in the conference is received, and the lower-level MCU processes itself as the MCU.
  • the lower-level MCU modifies the TerminalLabel value in the message according to the direction in which the H239 presentation message is sent, so that it conforms to the role played by the lower-level MCU in each conference.
  • TerminalLabelDown is a terminal number variable assigned to the lower level by the superior, and is used to save the TerminalLabel allocated by the MCU of the upper-level conference to the lower-level MCU;
  • TerminalLabelUp is a terminal number variable assigned to the upper level to store the TerminalLabel assigned by the lower-level MCU to the upper-level conference MCU.
  • TerminalLabelReq The current application terminal variable is used to store the TerminalLabel of the terminal applying for the H239 demo token in the subordinate conference;
  • TerminalLabelPre currently holds the terminal variable, which is used to save the TerminalLabel of the H239 presentation token in the current conference
  • TerminalLabelPre TerminalLabel of the H239 presentation token terminal in the current conference
  • TerminalLabelPre TerminalLabelPre
  • TerminalLabelPre TerminalLabelPre
  • TerminalLabelPre TerminalLabelPre
  • the H239 presentation token in the current conference is the cascade port that is cascaded with the upper-level conference.
  • the value of the TerminalLabel in the message is first.
  • the TerminalLabel in the PresentationTokenRequest message is converted into the TerminalLabelDown (in the present invention by the assignment method, the same below), and forwarded to the upper-level conference MCU. If the H239 presentation token in the current conference is on the terminal in the next conference, and the PresentationTokenRequest message is received from the cascade interface that is cascaded with the upper conference, there are two ways: 1.
  • the lower-level MCU directly returns the agreed PresentationTokenResponse message to At the same time, the H239 presentation token of the H239 presentation token holding terminal in the conference is forcibly deprived. 2.
  • the subordinate MCU will receive the PresentationTokenRequest message and forward the terminal holding the token. The terminal decides whether to agree to release the H239 presentation token.
  • the H239 presentation token in the current conference is the cascading port that is cascaded with the upper-level conference.
  • the lower-level MCU receives the PresentationTokenRelease message or the PresidentationTokenOwner Indi cat i from the cascade port that is cascaded with the upper-level conference.
  • the subordinate MCU receives the PresentationTokenRelease message from the H239 presentation token holding terminal, and forwards the message to the cascade port of the upper conference concatenation.
  • Figure 1 shows a simple primary-third-level cascaded conference television system.
  • the primary MCU and the tertiary MCU are respectively MCUs in the cascade conference.
  • the main MCU is the MCU in the main conference, and the third-level MCU. It is the MCU in the three-level conference.
  • ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4 respectively represent four terminals connected to the main MCU and the three-level MCU in the conference, where Tl and ⁇ 2 are connected to the main MCU, and T3 and T4 are connected to the third-level MCU.
  • the three-level MCU stores two TerminalLabel values, one assigned to the primary MCU and recorded as the Terminal labelDown, and one third-level MCU allocated for the cascade port connected to the primary MCU, which is recorded as the TerminalLab e 1 Up.
  • FIG. 2 is a flowchart of processing a PresentationTokenRequest message received by a lower-level MCU in the present invention, and still uses a three-level MCU as an example.
  • TerminalLabelPre! TerminalLabelUp
  • TerminalLabelUp TerminalLabelUp
  • TerminalLabelReq TerminalLabelReq
  • the lower level MCU of the present invention receives the PresentationTokenRelease and
  • the flowchart of the processing of the PresentationTokenOwnerlndication message is still described by taking a three-level MCU as an example.
  • TerminalLabelUp determines whether the message is received from the cascade port that is cascaded with the upper-level conference. If not, the terminalLabel is re-assigned to TerminalLabelDown, and then the message is forwarded to the cascade port that is cascaded with the superior.
  • the method for using the H239 presentation token in the multi-level cascade conference television system of the present invention is not interoperable when the second video is implemented by using the presentation token method specified in the H239 protocol in the multi-level cascade conference, and the multi-level In the joint conference, when the H239 presentation token related message is transmitted, the problem arises from the confusion of the TerminalLabel in the message.
  • the multi-level cascade conference only needs to use a set of H239 presentation tokens.
  • the terminal of the token sends the second video, and the other terminal receives, so as to realize the interworking of the second video in the multi-level cascade conference.
  • the MCU hereinafter referred to as the lower-level MCU
  • the conference grading node assumes the role conversion task, which solves the confusion of the TerminalLabel in the message.

Landscapes

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

Abstract

L'invention concerne un procédé destiné à l'utilisation de jetons de présentation H.239 dans un système de vidéoconférence à plusieurs étages en série, comprenant plusieurs unités de commande multipoint. Selon ce procédé, il n'y a qu'un ensemble de jetons de présentation H.239 dans le système de conférence. Lorsque le message de présentation H.239 est transmis à la conférence d'étage inférieur, l'unité de commande multipoint de l'étage inférieure convertit le numéro de terminal dans le message de présentation H.239 en numéro de terminal attribué par la conférence d'étage inférieur. Lorsque le message de présentation H.239 est transmis à la conférence d'étage supérieur, l'unité de commande multipoint de l'étage inférieur convertit le numéro de terminal dans le message de présentation H.239 en numéro de terminal attribué par la conférence d'étage supérieur. Le terminal qui détient les jetons de présentation H.239 transmet la vidéo du second canal.
PCT/CN2005/002437 2005-12-31 2005-12-31 Procede d'utilisation de jetons de presentation h.239 dans un systeme de videoconference a plusieurs etages en serie WO2007076637A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/002437 WO2007076637A1 (fr) 2005-12-31 2005-12-31 Procede d'utilisation de jetons de presentation h.239 dans un systeme de videoconference a plusieurs etages en serie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/002437 WO2007076637A1 (fr) 2005-12-31 2005-12-31 Procede d'utilisation de jetons de presentation h.239 dans un systeme de videoconference a plusieurs etages en serie

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1283930A (zh) * 1999-08-09 2001-02-14 深圳市华为技术有限公司 一种在会议电视系统中实现多点控制单元多级级联的方法
CN1284816A (zh) * 1999-08-17 2001-02-21 深圳市华为技术有限公司 一种在会议电视系统中实现多点控制单元三级级联的方法
WO2004109975A1 (fr) * 2003-06-05 2004-12-16 Siemens Communications, Inc. Systeme et procede permettant d'autoriser une partie a se joindre a une conference

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1283930A (zh) * 1999-08-09 2001-02-14 深圳市华为技术有限公司 一种在会议电视系统中实现多点控制单元多级级联的方法
CN1284816A (zh) * 1999-08-17 2001-02-21 深圳市华为技术有限公司 一种在会议电视系统中实现多点控制单元三级级联的方法
WO2004109975A1 (fr) * 2003-06-05 2004-12-16 Siemens Communications, Inc. Systeme et procede permettant d'autoriser une partie a se joindre a une conference

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