KR100463875B1 - A Method For Controlling Video Conference Using SIP - Google Patents

Abstract

The present invention relates to a video conference control method using SIP.

The present invention provides a process of sending a SIP message to the MCU such that a plurality of clients establish a meeting at the same time or at the same time, or participate in an established meeting, and the MCU receives the SIP message and accesses information or accesses to the meeting to the connected client. Determining whether to send a response message, data such as voice, video, and text are extracted from the audio / video capture and whiteboard, and transmitted to the MCU, and the MCU receives the data received through the audio / video mixing module. The present invention provides a video conference control method using SIP configured to store and mix the data in a temporary buffer and transmit only necessary data to clients other than the received client.

According to the present invention, the SIP protocol provides only the information necessary for the client to reduce the load on the system, and by the main system (MCU) to authenticate the person who can participate in the meeting or order the exit of the information in the company. Provides the effect of eliminating leaks.

Description

A method for controlling video conference using SIP

The present invention relates to a video conference control method using SIP.

In the prior art, a videoconferencing system has been conducted in real time by teleconference participants using a television or the like. However, not only was the system operating cost excessive, but only the chairman of the conference presented the data, so that the participants could not adopt their data as the subject of the meeting when they wanted to.

Therefore, a further improved conventional technology has been disclosed, which is a video conference system using the Internet or a video conference system using a dedicated line.

However, since the Internet or leased line video conferencing system has logic that all the participants' data is transmitted and received, the central system is overloaded and frequently disconnected, and a separate leased line or a new system must be installed. In terms of cost, the user has been disregarded.

As such, a video conferencing system that receives only necessary data using existing systems, such as a computer in use, processes it, and provides only the necessary data to each client, and allows each client to view the data during the meeting. The advent of a video conferencing system in which conferences were conducted was provided by providing all clients with pictures or texts written by the user.

Accordingly, the present invention has been made in order to eliminate the above drawbacks, the object of the present invention is to provide a videoconferencing control method using SIP that provides only the information required by the client to extract the necessary information using the SIP protocol. have.

It is also an object of the present invention to provide a videoconferencing control method using SIP that can eliminate the leakage of information in the company from the beginning by authenticating or ordering the person who can participate in the conference.

1 is a configuration diagram schematically showing a videoconferencing control system.

2 is a block diagram for video conference control.

3 is a diagram illustrating an example of video conference control.

** Brief description of the main parts of the drawing **

10: Multipoint Control Unit (MCU)

11, 41: RTP / RTCP protocol 12, 42: SIP protocol

13, 43: TCP / IP protocol 14: audio / video mixing module

15: room management module 16: management module

17: DB interface 20: DB (database) server

30: web server 40: client or PC

44: audio / video capture 45: whiteboard

46: ActiveX

To this end, the present invention provides a process for transmitting a SIP message to the MCU to allow a plurality of clients to simultaneously or at the same time establish a meeting or to participate in the established conference, and the MCU receives the SIP message and accesses the connection information to the connected client. Alternatively, the process of determining whether or not to enter a meeting and sending a response message, and data such as voice, video, and text are extracted from the audio / video capture and the whiteboard and transmitted to the MCU, and the MCU is provided through the audio / video mixing module. The present invention provides a method for controlling videoconferencing using an SIP comprising storing and mixing received data in a temporary buffer and transmitting only necessary data to clients other than the received client.

In addition, the present invention further includes the process of providing information that the MCU can provide information on a meeting in progress or a meeting can be established when a meeting is in progress on the screen of a client connected for the first time.

In another aspect, the present invention further includes the process of controlling the participation or exit of the client by the MCU by authenticating the participation in the conference or by instructing the exit of the client participating in the conference.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The MCU 10 receives a voice, image, picture or text data packet transmitted from each client 40, processes it, and transmits the packet to the client 40. The MCU 10 uses the RTP 11, TCP 13, UDP, and SIP 12 protocols for transmitting and receiving such data.

The RTP 11 receives the real-time voice and image data from the client 40, transmits it to the MCU 10, and provides a route transmitted to the client 40, and the TCP 13 provides data other than the voice and image data. It provides a passage for transmitting from the client to another client via the MCU (10). When a client 40 selects and transmits content from the whiteboard 45, the MCU 10 transmits selected data to each client. The data that can be transferred can be sent not only word files such as Hangul, but also homepage access documents.

In addition, the TCP 13 provides a path through which the MCU 10 can transfer packets for accepting, forcibly leaving, requesting questions, and accessor lists to each client 40.

UDP provides a path for forwarding request and reply packets from the client 40 when the MCU 10 and the client 40 are connected, and the SIP 12 allows the client 40 to initially transmit to the MCU 10. In order to provide a standard for data transfer between the codec of the client 40 and the codec of the MCU 10 upon connection, the client 40 transmits and receives information (IP, codec type, etc.) and provides a channel upon termination.

The SIP protocol 12 is a protocol for signal processing between a peer-to-peer and identifies a client using an e-mail address form and provides mobility of the client. In other words, the client uses the same SIP address, but it supports the ability to register, modify, delete, and search for the location on the terminal or computer in different places with mobility. Fork, session connection, and request message of other request messages It is a protocol that operates independently of the lower transport protocol and performs the function of rejecting or suspending a session in use.

Accordingly, the SIP protocol 12 transmits a SIP message to the MCU 10 so that a plurality of clients 40 can simultaneously or at the same time establish or join a conference. The client may send connection information for the meeting or a response message for determining whether or not to enter the meeting.

The system-specific functions will now be described based on the above contents.

The MCU 10 maintains information about the room of the connected client 40 and records it in the DB 20. The MCU 10 is responsible for data transfer between clients of various packets for conducting a meeting in the room. A control packet processing function, an image and mixing function for receiving image data and audio data from a connected client, and then synthesizing and transmitting only necessary data; and a function for processing a SIP message sent from the client 40 to connect a session. , And communicates with the DB (20) to get the member information or to the function of recording the room status information.

In particular, the function of processing a SIP message and connecting a session refers to a function of, for example, opening a protocol to wait for transmission of data by processing a message for responding to an invitation message when the invitation message is received from the client 40.

The DB server 20 includes, but is not limited to, a member table in which member information is recorded, an MCU table in which MCU information is recorded, and a meeting information table in which currently opened rooms and connected client information are recorded.

The web server 30 provides a member login function that allows only authenticated clients to join the meeting, a function of opening a new conference (meeting function), and a function of joining a currently established conference (meeting function). do.

The client 40 has a SIP processing function for transmitting and receiving SIP messages to and from the MCU 10, a voice and image capture function for transferring voice and image data to the RTP 41, and word files such as the following Hangul through the MCU 10; Whiteboard function to transfer home page access files and the like to each client, control packet processing function to transfer various control packets, and all the MCU information from the web server 30 using Active X. And use it to participate in meetings. Accordingly, the client 40 has an RTP 41, a SIP 42, a TCP 43 communication protocol, and the like.

In the present invention, the client 40 refers to a terminal used by the user and may refer to only the user.

A control method of video conferencing using SIP will now be described with reference to the drawings.

When the client 40 opens a conference room through the web server 10 or joins an ongoing conference room, a window as shown in FIG. 3 is generated in its terminal.

This is done via Active X 46.

At this time, when the client 40 clicks the connection button of the access window A on the latitude outputted to his terminal, the client 40 can access the conference room opened in the MCU 10. Clients not allowed are denied access. If the connection is successful, the access button is deactivated and controls are placed according to the mode of participation. For example, if you are in moderator mode (if the client is a meeting presenter), the whiteboard toolbar (C) is activated and a forced exit button is created; in participant mode (when you join an established meeting), the whiteboard toolbar It is deactivated and a question request button is created. In other words, the activated and generated buttons are set differently according to the participation mode, but the present invention may also set the same.

In the accessor list B, a list of clients in progress is started. If three clients are connected, all three clients are created.

When the client 40 accesses the conference room, a screen of the connected client is generated in the access window A, which is controlled by the MCU management module 16. In addition, the client 40 and the MCU 10 are provided with separate modules for image and audio data processing through the RTPs 11 and 41.

For example, when the client 40 joins a meeting through the web server 30, voice and video data are captured by the audio / video capture 44 through a microphone or a camera, and transmitted to the MCU 10 through a protocol. The management module 16 of the MCU 10 stores the data in a buffer and processes the data through the audio / video mixing 14. The data thus processed is transmitted to each client 40 only the necessary data in reverse order. That is, when the A, B, and C clients access, the video and audio data are transmitted to the MCU 10, respectively, but only the B and C client information is transmitted to the A client, and similarly, only the A and C client information is transmitted to the B client. The load of the MCU 10 is controlled to be optimally configured.

Therefore, the room management module 15 synchronizes the information about the group (room) of the clients who participated in the meeting (for example, the ID of the client who participated in the meeting room and related information) with the DB server 20 in synchronization with the management module 16. Control in progress, and allows multiple meetings to be in progress at the same time.

On the other hand, when the client 40 connects to a meeting, the window is provided with a toolbar C (in some cases, the toolbar may be deactivated), and the toolbar C has various functions such as file import, Sending and interrupting function to MCU 10, various drawing tools, and painting function to select certain parts and paint them in required colors are possible. When necessary documents are on a web page, a domain can be directly accessed by entering a domain. have.

The file loaded using the function on the toolbar (C) is output to the whiteboard (D) and transmitted to the MCU 10 so that all the clients 40 can view it so as to facilitate the progress of the meeting. .

The privileged client 40, such as presiding a meeting among the clients, may be forced to leave the client without an attendance qualification and may allow the entry upon simple participation, and the present invention is configured to be implemented through a function button E. It was. Therefore, when the authorized client sends the exit command of the client connected on the function button (E), the MCU is disconnected by transmitting the exit client information to the MCU, and the MCU 10 or the client 40 has a meeting. By registering in advance a list of available attendees, you can control access from the beginning.

In addition, the function button (E) has a chat function, after inputting the contents to be transmitted and then transmitted to the MCU 10 and then transmitted to each client 40. When each client 40 receives the chat content, the content is displayed in the chat output field (F). In some cases, you can select a specific client and send its contents, and only the selected client displays the contents on its own terminal. In addition, if there is a question, the logic may proceed as described above.

If some of the clients do not need or end the meeting, the client can leave the meeting by clicking the End button, and the meeting ends when the client with the presiding authority clicks End Meeting.

The present invention has been described in detail with reference to the accompanying drawings. However, it will be obvious to those skilled in the art that various modifications can be made within the scope of the following claims in the technical field to which the present invention pertains.

According to the present invention, the SIP protocol provides only the information necessary for the client to reduce the load on the system, and by the main system (MCU) to authenticate the person who can participate in the meeting or order the exit of the information in the company. Provides the effect of eliminating leaks.

Claims (3)

In the videoconferencing control method using SIP, Transmitting a SIP message to the MCU 10 so that a plurality of clients 40 simultaneously or at the same time establish a meeting or participate in the established meeting, The MCU 10 receives the SIP message and transmits a response message to the connected client 40 by determining access information or conference entry of the conference, Data such as audio, video, and text are extracted from the audio / video capture 44 and the whiteboard 45 and transmitted to the MCU 10; The MCU 10 stores and mixes the data received through the audio / video mixing module 14 in a temporary buffer and transmits only necessary data to clients other than the received client. Video conference control method. The method of claim 1, wherein the MCU 10 provides a process for providing information on a meeting in progress or opening a meeting when a meeting is in progress on a screen of a client 40 connected for the first time. A videoconferencing control method using SIP further comprising. The process of claim 1 or 2, wherein the MCU 10 further controls the process of controlling the client's participation or exit of the meeting by authenticating the participation in the meeting or by instructing the client 40 to participate in the meeting. A videoconferencing control method using SIP comprising a.