WO2007009293A1 - Méthode de télécommande d’un terminal de vidéo conférence h.320 - Google Patents

Méthode de télécommande d’un terminal de vidéo conférence h.320 Download PDF

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Publication number
WO2007009293A1
WO2007009293A1 PCT/CN2005/001072 CN2005001072W WO2007009293A1 WO 2007009293 A1 WO2007009293 A1 WO 2007009293A1 CN 2005001072 W CN2005001072 W CN 2005001072W WO 2007009293 A1 WO2007009293 A1 WO 2007009293A1
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WO
WIPO (PCT)
Prior art keywords
terminal
channel
remote control
controlled
message
Prior art date
Application number
PCT/CN2005/001072
Other languages
English (en)
Chinese (zh)
Inventor
Hui Li
Xiaobin Zhu
Zhiping Tian
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/CN2005/001072 priority Critical patent/WO2007009293A1/fr
Priority to CNB2005800490404A priority patent/CN100551029C/zh
Publication of WO2007009293A1 publication Critical patent/WO2007009293A1/fr

Links

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

Definitions

  • the invention relates to the field of digital multimedia communication, in particular to a method for remotely controlling an H.320 conference television terminal through an H.320 conference television line.
  • conference TV has become more and more large-scale and adopted by various industries.
  • the entire network of conference TV is also getting larger and larger, and the maintenance cost brought by it is also coming. The higher.
  • Method 1 Install a Simple Network Management Protocol (Simple Network Management Protocol) for remote terminals, and connect remote terminals to the same Internet.
  • IP Internet Protocol
  • Method 2 For the remote terminal built-in web server (web server), log in to the remote terminal's page through the browser at the central site, thereby achieving control and management of the remote terminal.
  • web server web server
  • TCP/IP Transmission Control Protocol/Internet Protocol
  • the object of the present invention is to provide a remote control of the H.320 conference television terminal using the H.320 conference television line. method.
  • a method for remotely controlling an H.320 conference television terminal requires the use of at least two H.320 conference television terminals.
  • the terminal refers to the H.320 videoconferencing terminal, one of which is a local master terminal, and the others are remotely controlled terminals, and the number of the controlled terminals is not limited.
  • the method includes the following steps:
  • Step 1 Start the remote control process of both the main control terminal and the controlled terminal, even if both the main control terminal and the controlled terminal enter the remote control state;
  • Step 2 Establish a data channel for remote control between the above-mentioned master terminal and the controlled terminal;
  • Step 3 The above-mentioned main control terminal and the controlled terminal communicate on the above-mentioned data channel for remote control, and complete remote control.
  • step 1 includes the following steps:
  • Step 111 Establish a data transmission channel between the above-mentioned master terminal and the controlled terminal participating in the remote control;
  • Step 112 The above-mentioned master terminal sends the above-mentioned controlled terminal through the above data transmission channel. Sending a message, that is, remotely controlling the startup message, notifying the controlled terminal to start the remote control process, thereby setting the mechanism and process controlled by the remote controlled terminal to be the same as the mechanism and process controlled by the local master terminal, so that the above Both the master terminal and the controlled terminal enter the remote control state.
  • the above step 111 includes:
  • a two-way data transmission channel is established between the above-mentioned master terminal and the controlled terminal, and a unidirectional data transmission channel is separately established.
  • the remote channel in H.320 conference television is a one-way data transmission channel.
  • the two-way data transmission channel refers to that the master terminal and the controlled terminal can mutually receive data transmitted by each other on at least one standard channel of the H.320 conference television system, wherein the unidirectional data transmission channel and the two-way data transmission channel are both Refers to logical functions and does not necessarily have separate entities. Moreover, since the two-way data transmission channel has the function of realizing one-way data transmission at the same time, the two-way data transmission channel can be used for unidirectional data transmission without separately establishing the unidirectional data transmission channel.
  • the master terminal in the foregoing step 112 may send the foregoing remote control start message to the controlled terminal in any feasible manner, for example, including the following manners:
  • step 2 includes the following steps:
  • Step 211 The above-mentioned master terminal and the controlled terminal jointly open a pre-agreed data channel on the basis of the two-way data transmission message established in the above step 1;
  • Step 212 The above-mentioned master terminal and the controlled terminal establish a bidirectional logical channel, that is, a remote control channel, based on the data channel opened in the above step 211, to transmit control and response information in the remote control process.
  • a bidirectional logical channel that is, a remote control channel
  • the data channel in the above step 211 may be any entity that implements bidirectional transparent transmission of data by using the above bidirectional data transmission channel, for example, Low Speed Data (hereinafter referred to as LSD) specified by the protocol system of the H.320 conference television. ), one of High Speed Data (HSD), Multi-layer-protocol (MLP), or High Multi-layer-protocol (H-MLP) Or, the above-mentioned master terminal and the controlled terminal temporarily stop the video channel that is idle to transmit video data, or a partial time slot in the above channel or a combination thereof.
  • LSD Low Speed Data
  • HSD High Speed Data
  • MLP Multi-layer-protocol
  • H-MLP High Multi-layer-protocol
  • the method for establishing the remote control channel on the basis of the data channel opened in the above step 211 is arbitrary, and includes, for example:
  • step 3 includes the following steps:
  • Step 311 The foregoing control terminal sends control information to the controlled terminal by using the remote control channel.
  • Step 312 The controlled terminal receives the control information on the remote control channel and executes the control information.
  • Step 313 The controlled terminal sends response information to the main control terminal by using the remote control channel.
  • Step 314 determining whether the remote control process ends, if otherwise, the above-mentioned master terminal and the controlled terminal repeatedly perform the above steps 311 to 313 until the remote control process ends; if yes, the remote control process is ended; The transmission of the control information and the response information does not have to follow a strict timing relationship, as long as both the master terminal and the controlled terminal can correctly understand each piece of information.
  • the essence of the method of the present invention is to transmit control and response information between the main control terminal and the controlled terminal through the H.320 conference television line, and remotely control the H.320 conference television terminal by using the method of the present invention.
  • the controlled terminal is not required to be equipped with a computer network interface, and the application range of the remote control on the terminal is expanded; the method of the present invention uses the inherent line of the H.320 conference television terminal for information transmission, which facilitates remote control and can reduce the terminal device. Maintenance costs.
  • FIG. 1 is a schematic view of an application mode of the present invention.
  • Figure 3 is a flow diagram of step 111 in an embodiment of the invention.
  • Figure 4 is a flow diagram of the present invention from establishing a remote control channel until remote control information is executed and responded. detailed description
  • FIG. 1 is a schematic view of an application mode of the present invention.
  • the "terminal” in the figure refers to the H.320 videoconferencing terminal.
  • the "link” and “network” in the figure refer to the H.320 conference television link and H, respectively.
  • the .320 conference television network in which the above "link” and “network” together constitute an H.320 conference television line.
  • the two terminals respectively access the network through the link, thereby realizing end-to-end data transmission and information exchange.
  • the present invention realizes in-band remote control of the remote terminal by controlling the connection of the local terminal.
  • FIG. 2 is a flow chart of the remote control method of the present invention. As shown in FIG. 2, the method of the present invention mainly includes the following steps:
  • Step 201 start;
  • Step 202 Connect the local terminal by using dedicated software and a local control system; wherein the dedicated software can be obtained through separate development or modified on the basis of local control software;
  • Step 203 Establish a one-way and two-way data transmission channel between the two terminals;
  • Step 204 Send a remote control startup message.
  • Step 205 Open a bidirectional data channel between the two terminals
  • Step 206 Establish a remote control logical channel
  • Step 207 Send control to the remote terminal through the local terminal by using local control software.
  • Step 208 The remote terminal executes control information.
  • Step 209 The remote terminal sends the response information to the local terminal and the control software.
  • Step 210 Repeat the above steps 207 to 209 until the current control ends.
  • Step 211 Send the remote control termination message through the local terminal, and the process ends.
  • a specific embodiment is illustrated below to illustrate that the terminal commands the remote end to perform an input video parameter adjustment command by the method of the present invention.
  • the terminal uses the LSD channel as a unidirectional data transmission and the video channel as a two-way data transmission.
  • Figure 3 is a step in an embodiment of the present invention
  • Step 301 start;
  • Step 302 Bring two terminals that need to participate in the remote control (referred to as one terminal A as terminal A, and correspondingly another terminal as terminal B) into the same newly started H.320 conference, where the two terminals Must have the ability to transmit H.281 messages over the LSD channel. If the two terminals enter a multipoint conference, the Multipoint Controller Unit (hereinafter referred to as MCU) also has the corresponding capabilities;
  • MCU Multipoint Controller Unit
  • Step 303 Determine the type of the current conference. If the current conference is a point-to-point conference, both terminals can open the LSD channel to send data to the other party, and the two ends. The terminals can receive each other's data on the video channel, wherein each other sees the image of the other party, which can be referred to as "image mutual viewing". Therefore, both the one-way and two-way data transmission mechanisms have been implemented, and step 308 is performed; If the conference is a multipoint conference, step 304 is performed;
  • Step 304 The terminal A sends a CCA message, applies for a chair token, and the MCU responds to the request, and gives the terminal A a chair token;
  • Step 305 The terminal A sends a VCB message, and the parameter of the message is the M/T number of the terminal A.
  • the MCU responds to the message and broadcasts the image of the terminal A to all other terminals in the conference, so that the terminal B sees the terminal A.
  • Image The parameter of the message is the M/T number of the terminal A.
  • Step 306 The terminal A sends a VCS message, requesting an image selection, the parameter of the message is the M/T number of the terminal B, and the MCU responds to the message, and sends the image of the terminal B to the terminal A, and the multi-point conference condition Two terminals A and B realize image mutual viewing, and a two-way data transmission mechanism is implemented.
  • Step 307 The terminal A sends a DCA-L message to apply for an LSD token, and the MCU responds to the request, and the LSD token is given to the terminal A, so that the terminal A has the right to send data to the terminal B on the LSD channel in the multipoint conference.
  • the one-way data transmission mechanism is also implemented;
  • Step 308 End.
  • Terminal A then sends a remote control initiation message through the LSD channel, which is actually an extended H.281 message, specifically belonging to the Action message.
  • Table 1 shows the structure of the remote control start message - Table 1
  • the first part in Table 1 is a 1-byte action code, and the H.281 protocol uses 0x01-0x07. In this embodiment, it is set to 0x09, so that terminal B can separate the remote control through the action code of 0x09. Start message
  • the second part of Table 1 uses four bytes to indicate the device type of the desired controlled terminal.
  • the present embodiment requires the master terminal and the controlled terminal to be the same type of terminal, and the controlled terminal can determine its own.
  • the device type is the same as the device type represented in this section and is handled differently.
  • Terminal A stops transmitting video data on the video channel after transmitting (receiving) the remote control start message, and in the subsequent remote control process, the terminal directly uses the idle video channel as a data channel for remote control.
  • a remote control channel is established thereon.
  • the remote control channel is composed of message packets, and each message packet is composed of a number of bytes.
  • the message packet is transmitted on the video channel, and the contents of the same message packet are continuously transmitted in order.
  • the first byte of the latter message packet is transmitted along with the last byte of the previous message packet, and both terminals A and B are themselves.
  • the uplink video channel transmits a message packet and receives a message packet from the downlink video channel, thereby establishing a remote control channel.
  • Table 2 shows the format of the message packets that make up the above remote control channel - Table 2
  • the length is the total length of the message minus 18 where the first part of Table 2 is a fixed header of 4 bytes, as the starting flag of the message;
  • the second part in Table 2 is the length of 4 bytes, giving the total length of a certain message packet; the third part in Table 2 is the sequence number of 4 bytes, and the terminal checks whether the serial number is continuous when receiving the message. To determine if there is a message missing;
  • the fourth part in Table 2 is a 4-byte code giving the type of this message packet; the fifth part in Table 2 is a variable-length message parameter, different types of message packets, the length and meaning of the parameters. all different.
  • the "Control” message in Table 3 is used for control information and response information transmitted between the two terminals.
  • Figure 4 is the terminal from the establishment of the remote control channel until the remote control information is executed and responded Complete action flow chart. The usage of the above message will be described in detail below with reference to FIG. As shown in Figure 4, it includes the following steps:
  • Step 401 Start sending and receiving a message packet on a video channel.
  • Step 402 to step 405 is a process in which the master terminal and the controlled terminal perform a communication handshake on the remote control channel.
  • step 402 the main control terminal sets the type of the sent message packet to be "connected";
  • Step 403 The controlled terminal separates one message from the byte stream by searching for the message header, and obtains the message type according to the message format defined in Table 2 above. To prevent false positives, the controlled terminal must be consecutive five. After receiving the "connected" or "connected” message, the process proceeds to step 404, otherwise step 403 is repeated. Obviously, this step is essentially a process of receiving and synchronizing the received video data according to the format of the message packet;
  • Step 404 The type of the message reported by the controlled terminal is set to "Connected”;
  • Step 405 In order to ensure that the main control terminal can also receive enough "Connected” or “Connected” messages to achieve synchronization of the reception of the message packet. , "Connected” message must be sent at least five times; If the master terminal sends at least five "connected” messages and also receives at least five "connected” messages sent by the controlled terminal, it means that the master terminal Receiving synchronization with the controlled terminal, in this case, the handshake is considered successful, step 406 is performed, otherwise step 405 is repeated;
  • Step 406 Determine whether the local end is the sending end of the software code, that is, whether the local end is the main control terminal, if yes, execute step 407, otherwise execute 411;
  • Step 407 The main control terminal sends a "control" message, specific control commands, etc.
  • the content as a parameter of the message for example, a command message string for local control may be used as a parameter;
  • Step 408 The master terminal sets the sending message type to "padding"; since the video channel used by the remote control channel is a channel with a constant bandwidth, it requires that the message packet must be sent continuously, otherwise the controlled terminal loses the message.
  • the receiving of the packet is synchronized, so the master terminal must send a "fill" message when no other type of message can be sent to maintain the receiving synchronization of the controlled terminal.
  • the parameters of the message are meaningless, and the length is subject to the purpose of filling;
  • Step 409 Determine whether the master terminal receives the "control" message of the controlled terminal, if yes, execute step 410, otherwise repeat step 409;
  • Step 410 Processing a "control" message sent by the controlled terminal
  • Step 411 The controlled terminal sets the sending message type to "fill", its purpose and steps
  • Step 412 Determine whether the controlled terminal receives the "control" message of the master terminal, if yes, execute 410, otherwise repeat step 412;
  • Step 413 The controlled terminal processes the received "control" message, and takes out the parameter content for analysis and execution;
  • Step 414 The controlled terminal generates a "control" message to the main control terminal by using the execution result of step 413 as a parameter.
  • a response message string for local control is a parameter
  • Step 415 Determine whether the remote control process is finished, if yes, execute step 416, otherwise perform step 406; Step 416: End.

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 une méthode de télécommande d’un terminal de vidéo conférence H.320. La méthode comprend le démarrage du processus de télécommande dudit terminal de commande principal par ledit terminal commandé, la création d’un canal de données de télécommande entre ledit terminal de commande principal et le terminal commandé, et la communication entre ledit terminal de commande principal et le terminal commandé par ledit canal de données de façon à réaliser la télécommande. Lors de l’utilisation de la méthode de télécommande d’un terminal de vidéo conférence H.320 selon l’invention, le terminal commandé n’exige pas d’interface réseau informatisée et la portée de la télécommande du terminal est augmentée. La méthode selon l’invention utilise la ligne propre du terminal de vidéo conférence H.320 pour transmettre les informations réalisant la télécommande ce qui réduit les coûts de maintenance du terminal.
PCT/CN2005/001072 2005-07-19 2005-07-19 Méthode de télécommande d’un terminal de vidéo conférence h.320 WO2007009293A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2005/001072 WO2007009293A1 (fr) 2005-07-19 2005-07-19 Méthode de télécommande d’un terminal de vidéo conférence h.320
CNB2005800490404A CN100551029C (zh) 2005-07-19 2005-07-19 一种对h.320会议电视终端进行远程控制的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/001072 WO2007009293A1 (fr) 2005-07-19 2005-07-19 Méthode de télécommande d’un terminal de vidéo conférence h.320

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WO2007009293A1 true WO2007009293A1 (fr) 2007-01-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011035613A1 (fr) * 2009-09-27 2011-03-31 中兴通讯股份有限公司 Procédé et système de gestion d'une visioconférence multipoint, sous-système de gestion central et terminal vidéo

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103781171A (zh) 2012-10-24 2014-05-07 中兴通讯股份有限公司 一种终端及其同步控制方法
CN112738450B (zh) * 2021-01-19 2023-05-02 北京融讯科创技术有限公司 会议召开方法、装置、设备及计算机可读存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002045398A1 (fr) * 1999-06-14 2002-06-06 Ginganet Corporation Systeme de teleconference
CN1540987A (zh) * 2003-04-23 2004-10-27 深圳市中兴通讯股份有限公司南京分公 一种在会议电视系统中实现多路视频通讯的方法
CN1581967A (zh) * 2003-08-11 2005-02-16 英业达股份有限公司 视频会议中切换通信联机的系统及其方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002045398A1 (fr) * 1999-06-14 2002-06-06 Ginganet Corporation Systeme de teleconference
CN1540987A (zh) * 2003-04-23 2004-10-27 深圳市中兴通讯股份有限公司南京分公 一种在会议电视系统中实现多路视频通讯的方法
CN1581967A (zh) * 2003-08-11 2005-02-16 英业达股份有限公司 视频会议中切换通信联机的系统及其方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011035613A1 (fr) * 2009-09-27 2011-03-31 中兴通讯股份有限公司 Procédé et système de gestion d'une visioconférence multipoint, sous-système de gestion central et terminal vidéo
US8854419B2 (en) 2009-09-27 2014-10-07 Zte Corporation Method and system for controlling multipoint video conference, central control subsystem and video terminal

Also Published As

Publication number Publication date
CN101142819A (zh) 2008-03-12
CN100551029C (zh) 2009-10-14

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