KR100649645B1 - Multicast Video Conference System And Method Based on VoIP - Google Patents

Abstract

The present invention relates to a multicast videoconferencing system of voice / video / data through a video conference system and a VoIP telphony system based on an internet network. The present invention includes a trunk gateway system interworking with a PBX of a subscriber gateway (CPG) or a group telephone company; and a plurality of VoIP terminals capable of making calls over the Internet; And a multicast web conference system that provides video conferencing services between VoIP terminals, the multicast web conference system including a web server, a call server, an MCU server, and a DB server. Therefore, according to the present invention, it is possible to implement perfect voice / data / video between remote sites, and to establish a multi-party video conferencing system at a very low cost by interworking an existing VoIP telephony gateway, and to control hardware H.323 codec. Realization of high quality voice call through communication and use of pre-installed VoIP telephony equipment, as well as multi-party multicasting (multi-party simultaneous call) service between remote sites can be provided through the same terminal. In particular, with instant messenger and web conference system, video conferencing service can be used easily and conveniently when needed.

Multicast, Video Conferencing, Instant Messenger, MCU, CPG, VoIP, Room Open

Description

Multicast Video Conference System And Method Based on VoIP}             

1A and 1B are schematic diagrams showing the configuration of a conventional video conferencing system;

2 is a schematic diagram illustrating a videoconferencing system according to the present invention;

3 is a configuration example of the multicast web conference system shown in FIG. 2;

4 is a configuration example of a multipoint conferencing unit shown in FIG. 3;

5 is a configuration of a specific embodiment according to the present invention,

6 is a flow chart illustrating a multiparty conference procedure according to the present invention;

7 is a flow chart illustrating an example of various functions provided in accordance with the present invention;

8 is an example skin of an instant messenger applied to the present invention;

9 is an example of an instant messenger screen for establishing a video conference according to the present invention;

10 is an example of a conference room list screen created in accordance with the present invention;

11 is an example of a video conference screen according to the present invention;

12 is an example of a program sharing screen according to the present invention;

13 is an example of a whiteboard screen according to the present invention;

14 is an example of a file transfer screen according to the present invention;

15 is an example of a screen of online voting in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

210a, 210b: VoIP terminal 220: Multicast web conference system

221: router 222: web server

223: call server 224: MCU server

225: DB server

The present invention relates to a teleconferencing system, and more particularly, to a videoconferencing system using an instant messenger based on VoIP.

In general, a video conference system is a teleconference system in which remote meeting rooms are connected by video and audio communication lines. Teleconferences, online training, customer service, server operation, and online social gatherings of corporations and government offices are conducted. This is a system that can be used in online education. Compared to a conference call that transmits only a voice, such a video conference system can proceed with a meeting in an atmosphere that seems to be all in one place by looking at the other party, hearing a story, and speaking his or her opinion.

The basic configuration of the videoconferencing system differs depending on the number of participants, transmission media, video, sound, and data.However, the video unit for transmitting and receiving video, the control unit for controlling the progress of the conference, and the audio and video data are encoded. It consists of the equipment to send to the other party. Recently, a function of sharing data created on a personal computer and working on it has been added, and a multimedia teleconferencing system of text, video, and voice using the Internet has appeared. However, the conventional video conferencing system built on the Internet network has the equipment price burden and various connection environment of users due to the use of expensive end terminals such as a separate webcam microphone camera or compression / transmission of voice data by software. There is a problem in that it is difficult to supply high quality service due to the absence of circuit QoS.

Fig. 1A is a schematic diagram showing the configuration of a conventional videoconferencing system. The conventional videoconferencing system includes a dedicated videoconferencing terminal 11a, 11b in which a video camera, a microphone, a display, and the like are integrated. After the video connection was conducted. However, such a dedicated video conferencing system has a problem in that it costs a lot to build a conference system.

On the other hand, with the development of the Internet, there is a trend to increase the Voice On Internet Protocol (VoIP) system that can make voice calls using the Internet at a very low cost without using a conventional public telephone network, and such a VoIP system is illustrated in FIG. 1B. As described above, VoIP terminals 14a and 14b were connected through the Internet 15 to make a call. Such VoIP systems are already widely used in enterprises by securing a stable foundation. Therefore, if a video conferencing system can be implemented using such a widely distributed VoIP system, a video conferencing system can be constructed at a very low cost.

The present invention has been proposed to meet the above necessity, and an object thereof is to provide a video conference system and a video conference method using an instant messenger based on VoIP.

In order to achieve the above object, the system of the present invention, including a subscriber gateway (CPG) or trunk gateway, a plurality of VoIP terminals that can make calls over the Internet; After the authentication, the solution is characterized in that the connection to the multicast web conferencing system that provides a video conferencing service between the VoIP terminals.

Here, the multicast web conference system, Web server for providing a web service according to the HTTP protocol; A call server for providing call processing service when the subscriber uses video conference; MCU server to provide a multicast according to the conditions of various subscribers to enable video conferencing between terminals in different environments; And a DB server storing data required for the entire system, such as information about subscribers, authentication information, and billing information. The MCU server includes a web module for web services, a controller for controlling the overall operation, It includes an H.323 module for processing the H.323 protocol, a SIP module for processing the SIP protocol, a scheduler for processing conference schedules, and a mixer for processing voice and video streams.

In addition, the method of the present invention to achieve the above object, the step of logging on; Establishing a conference room for video conferencing via an instant messenger; Executing a video conference in the established conference room; Selecting a file share, providing a file sharing service; Selecting a whiteboard, providing a whiteboard service; Providing a file transfer service when selecting a file transfer; And if the online voting is selected, providing an online voting service.

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

FIG. 2 is a schematic diagram illustrating a videoconferencing system according to the present invention, FIG. 3 is a configuration example of the multicast web conference system shown in FIG. 2, and FIG. 4 is a multipoint conferencing unit (MCU) server shown in FIG. 3. Is an example of configuration.

First, the H.323 protocol used in the present invention will be briefly described to facilitate understanding of the present invention. H.323 is an ITU-T standard for transmitting multimedia videoconferencing data over packet-switched networks such as TCP / IP. It is a LAN standard for high-quality video, and low-bandwidth over slow lines as high as 28.8 Kbps. Internet standards for video delivery are included. Key products that follow the H.323 standard include WhitePine's CU-SeeMe v3.1.2, CU-SeeMe Pro, MicroSoft's Netmeeting, Intel's ProShare, and PictureTel's LiveLAN etc. This H.323 has excellent network scalability such as Ethernet, Gigabit ethernet, ATM, etc., and it is possible to use existing network, so it is inexpensive to build and PC-based video conferencing can be established anytime, anywhere. Available.

The video conferencing system of the present invention is composed of a plurality of VoIP terminals 210a and 210b and a multicast web conference system 220 connected through the Internet 202 as shown in FIG. In FIG. 2, the VoIP terminals 210a and 210b are connected to a PC or IP phone connected to a conventional general telephone or digital camera connected to a subscriber gateway device (CPG) or a trunk gateway of a corporate network PBX. The multicast web conference system 220 includes a router 221, a web server 222, a call server 223, a multipoint conference unit (MCU) server 224, and a DB, as shown in FIG. 3. The server 225 provides a 1: 1, 1 :, and: video conferencing service to customers using VoIP.

Referring to FIG. 3, the web server 222 provides a web service according to the HTTP protocol, the call server 223 provides a call processing service when the subscriber uses video conferencing, and the MCU server 224 provides various services. Multicast is provided according to the subscriber's conditions to enable video conferencing between terminals in different environments. As shown in FIG. 4, the MCU server 224 may include a web module and a controller, H.323, SIP, ETC, DB, scheduler, mixer, and CODEC.

The DB server 225 stores data necessary for the entire system, such as information on subscribers, authentication information, and billing information.

In such a configuration, the subscriber can use the normal VoIP service through the path as shown in ① of FIG. 2 using the VoIP terminals 210a and 210b. In addition, when a specific button is pressed to use the video conference service according to the present invention, it is connected to the multicast web conference system 220 according to the present invention through the path as shown in FIG. The MCU server 224 of the multicast web conferencing system interoperates with the database server 225 to first check whether the subscriber is a valid user, and then interworkes with the call server 223 to perform call processing of the subscriber. . After that, if the subscriber has the right authority through the authentication of the right authority, the video conference service is provided according to the subscriber's request.

5 is a view showing the configuration of a specific embodiment according to the present invention, the system of the embodiment to which the present invention is applied is a personal customer 210a, corporate customer 210c, the Internet 202, multicast web conference system 220 ), Gatekeeper (G / K: 231), Gateway (G / W: 232), VoIP Phone (210b), Switchboard (ETS: 234), International Gateway (IGW: 237), Public Telephone Network (PSTN: 235) , A phone 213, a mobile communication network 236, a mobile phone 219, an international network 238, and the like. And the personal customer 210a is usually made of Internet TV 211, PC 212, CPG 214, telephone 213, modem 215, etc., corporate customer 210c is PC 212, telephone 213, fax 216, private exchange (PBX: 217), gateway (G / W: 218), and the like.

Referring to FIG. 5, an individual customer 210a may use a VoIP service by connecting a general telephone 213 or a PC 212 to the Internet 202 using a one-port subscriber gateway (CPG: 214). The customer 210c uses the private exchange 217 and the gateway 218 to enable users of the extension to use the VoIP service. Other VoIP terminals may also be connected to the Internet 202 through the gatekeeper 231 to use VoIP services. The subscriber 213 of the general telephone network 235 and the subscriber 219 of the mobile communication network 236 may also be connected to the Internet 202 through the gateways 232 and 233 and each switching network 235 and 236 to make calls through a VoIP service. International calls may be made through the International Gateway Office (237). At this time, in the case of VoIP using only the Internet 202, it is possible to call for free, but there is a communication cost when passing through another pay network.

Gatekeeper (231) is an optional device for H.323 systems that provides call control services to H.323 endpoints and can use one or more gatekeepers. The gatekeeper 231 is logically separated from the endpoint, but physically installed with a terminal, a multipoint conference unit (MCU), a gateway, a multi point controller (MC), or other non-H.323 LAN device. . Gateway (232,233) is an optional element of an H.323 conference, which is a LAN that provides real-time two-way communication between an H.323 terminal on a LAN and another ITU terminal on the WAN, or to another H.323 gateway. Is the end point.

As described above, the multicast web conference system 220 includes a router 221, a web server 222, a call server 223, a multipoint conference unit (MCU) server 224, a DB server 225, and the like. It provides 1: 1, 1 :, and: video conferencing services to customers using VoIP.

Next, the operation of the present invention configured as described above will be described with reference to an example of a flowchart and a screen.

6 is a flowchart illustrating a multi-party conference procedure according to the present invention, and FIG. 7 is a flowchart illustrating examples of various functions provided according to the present invention.

The subscriber connects to and logs on to the server of the multicast web conference system 220. After logging on, download and activate Instant Messenger. If the subscriber has previously downloaded the instant messenger, the instant messenger may change the order and log on to the server system 220 (S1).

When the instant messenger is executed, a skin screen of the instant messenger appears as shown in FIG. 8, and a desired function is selected on this screen. For the video conference, a conference room is required to be opened through the video conference opening screen as shown in FIG. 9. Accordingly, the conference server 224 creates a conference room to use the video conference service (S2). As such, the establishment status of the conference room for video conference can be confirmed through the generated conference room list screen as shown in FIG. 10.

Subsequently, when a user (user) to attend the video conference is called and responded, the server system 220 connects the conference participants in the conference room in a multicast manner so that the video conference can be conducted in a multi-party manner as shown in FIG. (S3, S4). In FIG. 11, a multi-party video conference screen according to the present invention has been described as an example, but 1: 1 conference (chat) is also possible.

On the other hand, if file sharing is required during video conferencing, the file sharing function can be activated to share files through the program sharing screen as shown in FIG. 12 (S5 and S6).

In addition, when a white board is required, a white board service can be used through a white board screen as shown in FIG. 13 (S7, S8). When a file transfer is required during a video conference, a file transfer is shown as shown in FIG. The file can be transmitted through the screen (S9, S10).

In addition, when online voting is required during a video conference, online voting may be used through the online voting screen as shown in FIG. 15 (S11 and S12). Although not shown in the drawing, the system of the present invention is equipped with an electronic payment function, which enables electronic payment, and also allows questions and answers during payment (S13, S14).

As described above, the multicast web conferencing system based on H.323 voice code of the present invention has advantages of multi-face-to-face conferencing of a video conferencing solution and the Internet of existing pre-built gateways (1 port CPG, Enterprise Gateway). It is a communication system that can link all phones. That is, the present invention overcomes the voice call instability, which is the limitation of the current sound card based H.323 soft voice compression method, and integrates the VoIP gateway, gatekeeper and video conferencing system with software (S / Through the hardware (H / W) of the terminal called IP telephone, not the implementation of W), it is possible to send and receive video and voice with the other party in high quality / real time simultaneously by controlling the compression / transmission of voice data to the hardware platform. .

In addition, the H.323 gateway type web conferencing system according to the present invention can provide more stable call quality by interworking 1: 1 and 1: multiple online video conferencing solutions and voice data transmission with existing gateway hardware platforms. By simply applying the present invention to a user who is using an Internet phone, the desk phone can be used without connecting a PSTN and MOBILE call as well as a separate video phone during a video conference. Voice communication is possible. And for users who do not have an Internet phone gateway system, all services can be used as ASP services.

The present invention is easy to access a web conference regardless of the user environment using the H.323 interface and the SIP multimedia protocol interface, and is an instant messenger-based video application as an enterprise DB or groupware. User Login & Logout can be displayed in real time by linking and application, and various end-to-end communication tools such as electronic payment, binary file, voice recording, file broadcasting transmission, scheduling of reservation meeting, etc. End Communication Tools). And the web conferencing system of the present invention is an electronic payment question / answer, Enterprise D / B security sharing, organization group & remote meetings, online seminars and academic conferences, whiteboard, reservation call, electronic mailbox, chairman election and voting function Various applications can be provided, and software modulation can quickly support infraware according to the user environment of companies, schools, academies, and government agencies.

As described above, according to the present invention, a multi-party simultaneous call solution with a video conference module is provided by using a compression / transmission / decompression technique of voice data through an existing VoIP system, and thus, at a very low cost without additional equipment. The multicast video conferencing system can be constructed, and in particular, the instant messenger can be used to easily and conveniently use the video conferencing service when necessary. Furthermore, various video services such as file sharing, file transfer, whiteboard, and online voting can be simultaneously used during video conferencing, so that video conferencing can be efficiently conducted similarly to actual conferences.

Claims (5)

delete delete A plurality of VoIP terminals capable of making a call over the Internet, including a subscriber gateway (CPG); and a 1: 1 or multi-party communication between the VoIP telephony terminals after authenticating whether the VoIP terminal is a legitimate user by accessing a specific number. In a VoIP-based multicast video conferencing system composed of a multicast web conferencing system providing a video conferencing service capable of simultaneous calls, The multicast web conference system, A web server for providing a web service according to the HTTP protocol and an instant messenger for video conferencing; A call server for providing call processing service when the subscriber uses video conference; MCU server to provide a multicast according to the conditions of various subscribers to enable video conferencing between terminals in different environments; And It includes a DB server that stores data required for the entire system, such as information about subscribers, authentication information, billing information, The MCU server Web module for web services, controller to control overall operations, H.323 module to handle H.323 protocol, SIP module to handle SIP protocol, scheduler to handle conference schedules, voice and video streams VoIP-based multicast video conferencing system, characterized in that it comprises a mixer for processing. A plurality of VoIP terminals capable of making a call over the Internet, including a subscriber gateway (CPG); and a 1: 1 or multi-party communication between the VoIP telephony terminals after authenticating whether the VoIP terminal is a legitimate user by accessing a specific number. In the VoIP-based multicast video conferencing method using a multicast web conferencing system that provides a video conferencing service capable of simultaneous calls, Accessing the multicast web conference system to download an instant messenger or log in using a previously downloaded instant messenger; Establishing a conference room for video conferencing via the instant messenger; Executing a video conference in the established conference room; Providing a file sharing service when selecting file sharing in the instant messenger during the video conference; Providing a whiteboard service when the whiteboard is selected in the instant messenger during the video conference; Providing a file transfer service when the file transfer is selected in the instant messenger during the video conference; And And providing an online voting service if the online voting is selected by the instant messenger during the video conference. The method of claim 4, wherein the video conference method, And if the instant messenger requests electronic payment during the video conference, processing the electronic payment.

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