CN101098449A - Video conference business operation system and conference holding method - Google Patents
Video conference business operation system and conference holding method Download PDFInfo
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- CN101098449A CN101098449A CNA2006100614102A CN200610061410A CN101098449A CN 101098449 A CN101098449 A CN 101098449A CN A2006100614102 A CNA2006100614102 A CN A2006100614102A CN 200610061410 A CN200610061410 A CN 200610061410A CN 101098449 A CN101098449 A CN 101098449A
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- 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
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Abstract
The invention relates to a video conference service operate system and a relative conference start method, wherein the operate system comprises a multimedia terminal, a PARLAY network gate, a soft exchange device, a MCU device, a video conference service system, and a resource strategy server, which is characterized in that all multimedia terminals are registered on the soft exchange device. User can start conference via the video conference service system or via terminals. Via the invention, user can completely fuse video conference system and soft exchange, fully utilize the open property of Parlay API interface, to quickly and simply realize novel service, and simplify the protocol treatment of MCU, with simple structure, clear layers, and better expansion property, thereby accessing into terminals on different networks easily.
Description
Technical field
The method that the present invention relates to video conference business operation system and hold a meeting.
Background technology
Providing collection voice, data, video to the user on IP network is that the multimedia service of one is the target of communication network development.Constantly perfect along with fast lifting, QoS and the safe practice of IP network bandwidth, and the user is for the rapid growth of the multimedia communication demand of IP based network, how to make up can actual operation multimedia communication network, how to provide abundant multimedia communication service to the user, become telecom operators and communication apparatus merchant questions of common interest.
Domestic operator has H.320 system and H.323 two kinds of TV conference system of system.At present based on the video conference networks of H323 mostly towards government bodies, large-scale group users such as enterprises and institutions, basically be some proprietary networks, rarely has communication with public networks such as fixed-line telephone networks, and business function is more single, and emerging Softswitch technology then provides a kind of brand-new multimedia service implementation.
The Softswitch technology of next generation network adopts the network architecture of layering, possesses comprehensive opening.Provide in comprehensive access capability, business, there is remarkable advantages aspects such as network management, authentification of user, authentication and charging.When making up new generation network, it fully takes into account seamlessly transitting of existing diverse network, and business such as collection voice, data, multimedia are one, the professional customization of real realization.On the other hand, based on the continuous development of the data network of IP, for the carrying out of multimedia service based on Softswitch technology provides realistic foundation.Therefore in next generation network, carry out the inevitable choice that the video conference business operation is each operator.
To in next generation network, carry out the video conferencing operation at present, can only taking H.323, the way of TV conference system and softswitch device intercommunicating realizes, promptly all terminals insert by soft switch, utilize gatekeeper in the TV conference system H.323 and Softswitch to carry out intercommunication, as accompanying drawing 1 in neighborhood gatekeeper's mode each other.This mode still is two independently nets in fact, has just utilized the access function of soft switch.Particularly be independently on business, need two to overlap independently operation system, thereby make video conferencing service not carry out effective fusion with the miscellaneous service that soft switch provides.Be unfavorable for the maintenance and the business development of operator.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of system of video conference business operation and method of holding a meeting with this system of carrying out, the fusion fully of realization video conference network and soft switch.
Video conference business operation system among the present invention comprises multimedia terminal, PARLAY gateway, Softswitch, MCU equipment, video conference business system, resource policy service, wherein:
The multimedia terminal has voice, coding and decoding video ability and data function;
The PARLAY gateway is used the system that Parlay API is provided for the exploitation video conference business;
Softswitch provides concentrated calling control, access route and value-added service interface, and variety of protocol is adaptive;
MCU equipment provides audio mixing, visual codec functions, and is used to initiate meeting, realizes the various controls to meeting;
The video conference business system opens an account for network provides the user, multimedia service registration and reservation, charge information and settlement function and finish convention business management, session control function, and WEB user is provided service function;
Resource policy service is managed the resource of each MCU, and meeting is dispatched;
It is characterized in that,
Carry out communication by resource policy agreement or proprietary protocol between video conference business system and the resource policy system;
Carry out communication by Parlay API between video conference business system and the Parlay gateway;
Carry out communication by resource policy agreement or proprietary protocol between resource policy service system and the MCU;
Carry out communication by Session Initiation Protocol between MCU and the Parlay gateway;
Parlay gateway and Softswitch carry out communication by Session Initiation Protocol;
All multimedia terminals all are registered on the Softswitch.
In such scheme, the multimedia terminal is connected on the Softswitch by corresponding gateway.
H.323 terminal and Softswitch carry out communication by agreement H.323; H.320 terminal and Softswitch carry out communication by agreement H.320/H.323; Sip terminal and Softswitch carry out communication by Session Initiation Protocol.
In such scheme, resource policy service and video conference business system can lump together.
The method of utilizing video conference business operation system to hold a meeting among the present invention may further comprise the steps:
The user is by the preset conference of video conference business system;
The video conference business system passes to resource policy service with meeting information and carries out the resource affirmation;
Resource policy service reservation of resource and with result notification video conference business system;
The video conference business system orders MCU to begin meeting when meeting begins;
Video conference business system calling MCU;
MCU carries out call answering and with result notification video conference business system;
The video conference business system is by the Softswitch calling terminal;
Terminal is carried out call answering and is notified the video conference business system with the result through Softswitch;
The video conference business system is with the call answering result notification MCU of terminal, joining meeting to terminal.
Such scheme can also comprise following step of carrying out meeting control:
The user is in the view control operation of the enterprising guild in the meeting control interface of video conference business system;
The video conference business system is with meeting control command notice MCU;
MCU carries out the meeting control command and with result notification video conference business system.
The another kind of scheme of utilizing the method that video conference business operation system holds a meeting among the present invention may further comprise the steps:
The user is by the terminal preset conference;
Terminal is notified the video conference business system with subscription information by Softswitch;
The video conference business system passes to resource policy service with meeting information and carries out the resource affirmation;
Resource policy service is to reservation of resource and with result notification video conference business system;
The video conference business system orders MCU to begin meeting when meeting begins;
Video conference business system calling MCU;
MCU carries out call answering and with result notification video conference business system;
The video conference business system by Softswitch with preset conference result notification terminal, and with joining meeting to terminal.
Can also comprise following step of carrying out meeting control in the such scheme:
The user is in the view control operation of the enterprising guild of terminal interface;
Terminal is passed through Softswitch notice video conference business application system with the meeting control command;
The video conference business system is with meeting control command notice MCU;
MCU carries out the meeting control command and with result notification video conference business system;
The video conference business system notifies terminal with the result through Softswitch.
Adopt the present invention that following technique effect is arranged:
Can realize the fusion fully of video conferencing system and soft switch, the easier innovation that realizes business provides the communication service of variation, personalization, multimedization for the user;
Make full use of the opening of ParlayAPI interface, can realize new business quickly and easily, also help video conference business and other multimedias and value-added service simultaneously and merge;
Simplified the protocol processes of MCU, promptly MCU only need realize that Session Initiation Protocol gets final product, and does not need to realize simultaneously H.323 other agreements such as agreement to make full use of the abundant protocol adaptation ability of soft switch;
Whole architecture is simple, clear layer, and the personnel that help video conference and soft switch field develop, and insert dissimilar terminals by introducing different gateways simultaneously, have favorable expansibility.Thereby can insert the terminal of heterogeneous networks easily.
Description of drawings
Fig. 1 is each part schematic diagram that existing video conference operation system and soft switch are merged;
Fig. 2 is each part schematic diagram of video conference operation system of the present invention;
Fig. 3 is the flow chart of a kind of method of holding a meeting of the present invention;
Fig. 4 is the flow chart that another kind of the present invention is held a meeting;
Fig. 5 is the flow chart of user in the view control of the enterprising guild of user interface;
Fig. 6 is the flow chart of user in the view control of the enterprising guild of terminal interface.
Embodiment
Fig. 1 is existing system's composition diagram of carrying out video conference operation in next generation network, and therefrom as can be seen, except gatekeeper and terminal and Softswitch have the relation, other parts all are separately independently.
Fig. 2 is system's composition diagram of video conference operation of the present invention, and system comprises:
The multimedia terminal: have the subscriber equipment of voice, coding and decoding video ability and data function, these equipment may use different control protocols, as H.323, H.248, SIP, H.320, the MGCP terminal.
PARLAY gateway: for the exploitation video conference business is used the system that Parlay API is provided.
Softswitch: be whole server, concentrated calling control be provided, insert route and value-added service interface, and variety of protocol is adaptive, as carry out H323 and SIP, H.248 and SIP, the conversion of MGCP and SIP.
MCU equipment: functions such as audio mixing, visual encoding and decoding are provided, and have the initiation meeting, realize the functions such as various controls of meeting.
Video conference business system: open an account for network provides the user, multimedia service registration and function such as reservation, charge information and clearing and finish functions such as convention business management, meeting control, WEB user is provided service function.
Resource policy service: manage the resource of each MCU, and meeting is dispatched.
Various gateways are as H.320/H.323 gateway, H.320/SIP gateway.Mainly be in order to insert as terminal H.320.If there is no need to insert H.320 terminal then can not need these gateways.
Media server: can carry out functions such as playback in conference process, it is equipment not necessarily.
Wherein:
Carry out communication by the resource policy agreement between video conference business system and the resource policy system and also can carry out communication by proprietary protocol.
Be to carry out communication between video conference business system and the PARLAY gateway by Parlay API.
Be to carry out communication between resource policy service system and the MCU, also can carry out communication by proprietary protocol by the resource policy agreement.
Be to carry out communication between MCU and the Parlay gateway by Session Initiation Protocol.
Be to carry out communication between Parlay gateway and the media server by the MGCP agreement.
Parlay gateway and Softswitch are to carry out communication by Session Initiation Protocol.
H.323 terminal and Softswitch are to carry out communication by agreement H.323.
H.320 terminal and Softswitch are to carry out communication by agreement H.320/H.323.
Sip terminal and Softswitch are to carry out communication by Session Initiation Protocol.
Resource policy service system among Fig. 2 and video conference business system can lump together and as a whole providing is provided also can be separated as two independent parts.The functional entity that the PARLAY gateway can be used as Softswitch is attached in the Softswitch, also can be independent from Softswitch.H.320/H.323 a gateway functional entity can be used as Softswitch is attached in the Softswitch, also can be independent from Softswitch.It is independent that each protocol adaptation (H.323/SIP/H.248/MGCP) module in the Softswitch also can be used as corresponding gateway device, forms H.323/SIP gateway, gateway H.248/SIP, equipment such as MGCP/SIP gateway.
Fig. 3 is the flow chart that the user holds a meeting on the user interface that the video conference business system provides.Comprise following flow process:
The first step, user preengage video conference by the video conference business system:
The user preengages a video conference in the video conference business system;
The video conference business system by resource policy service agreement or proprietary protocol to Resource Server application resource;
Resource Server is dispatched to meeting on the corresponding M CU according to resource situation, resource kept, and with result notification video conference business system.
Second step, video conference business system holding video conference:
Video conference business notifications Parlay gateway is held a meeting;
Parlay gateway notice corresponding M CU holds a meeting;
MCU is with result notification Parlay gateway;
The Parlay gateway is again with result notification video conference business system.
The 3rd step, video conference business system calling terminal, call out each terminal and all will pass through the following step:
Video conference business operation system notice Parlay gateway call MCU;
The Parlay gateway sends to MCU with message related to calls;
MCU replys and with result notification Parlay gateway;
The Parlay gateway is with the response result notice video conference business system of MCU.;
Video conference business notifications Parlay gateway call terminal;
The Parlay gateway sends to Softswitch with message related to calls;
Softswitch sends to terminal (if H.323 terminal needs Softswitch to convert sip message to H.323 message) with message related to calls;
Terminal is replied and the result is sent to Softswitch;
Softswitch with the calling result of terminal send to the Parlay gateway (if H.323 terminal need Softswitch H.323 message conversion become sip message);
The Parlay gateway is with the call answering result notification video conference business system of terminal;
The video conference business system notifies MCU with the call answering result of terminal through the Parlay gateway.Terminal just adds in the meeting like this, can be with the MCU intercommunication.
Fig. 4 is the flow chart of holding a meeting on terminal.
The first step, user pass through the conference terminal holding video conference:
The user passes through conference terminal the meeting parameter is issued Softswitch;
Softswitch triggers video conference business, notice Parlay gateway;
Parlay gateway notice video conference business system;
The video conference business system by resource policy service agreement or proprietary protocol to Resource Server application resource;
Resource Server is dispatched to meeting on the corresponding M CU according to resource situation, and resource is kept.And with result notification video conference business system.
Second step, video conference business system holding video conference:
Video conference business system command Parlay gateway is held a meeting;
Parlay gateway notice corresponding M CU holds a meeting;
MCU is with result notification video conference business system.
The 3rd step, video conference business system calling MCU:
The video conference business system is by Parlay gateway call MCU;
MCU will call out the result by Parlay gateway notice video conference business system.;
The SDP information notice Softswitch that the Parlay gateway returns MCU;
Softswitch is with the SDP information notice terminal of MCU.Terminal has just successfully been held a meeting like this;
Other terminal in the 4th step, the meeting of video conference business system calling
The video conference business system is by Parlay gateway call MCU;
MCU will call out the result by Parlay gateway notice video conference business system;
The video conference business system passes through the Parlay gateway to the Softswitch calling terminal;
Softswitch will with the calling result of terminal by Parlay gateway notice video conference business system, terminal and MCU are with regard to access success like this.
Fig. 5 is the flow chart of user in the view control of the enterprising guild of video conference business system interface.
The user carries out meeting control in the meeting control interface that the video conference business system provides;
The video conference business system is with meeting control command notice Parlay gateway;
The Parlay gateway is with meeting control command notice MCU;
MCU carries out the meeting control command and the result is passed through the Parlay gateway tell the video conference business system.
Fig. 6 is the user that proposes of the present invention at the flow chart of the enterprising guild of terminal interface view control H.323.
H.323, the user is carrying out the meeting control operation in the terminal control interface;
Terminal sends to Softswitch with the meeting control command;
Softswitch is transmitted to the Parlay gateway with the meeting control command, (need in case of necessity with H.323 the meeting control command of agreement convert corresponding SIP meeting control command to);
The Parlay gateway sends to MCU with the meeting control command;
MCU carries out the meeting control command and with result notification Parlay gateway;
The Parlay gateway is controlled result notification video conference business system with meeting;
The Parlay gateway is controlled the result notification Softswitch with meeting;
Softswitch is controlled result notification terminal (sip message need be converted to H.323 message) with meeting.
Claims (8)
1, a kind of video conference business operation system comprises multimedia terminal, PARLAY gateway, Softswitch, MCU equipment, video conference business system, resource policy service, wherein:
The multimedia terminal has voice, coding and decoding video ability and data function;
The PARLAY gateway is used the system that Parlay API is provided for the exploitation video conference business;
Softswitch provides concentrated calling control, access route and value-added service interface, and variety of protocol is adaptive;
MCU equipment provides audio mixing, visual codec functions, and is used to initiate meeting, realizes the various controls to meeting;
The video conference business system opens an account for network provides the user, multimedia service registration and reservation, charge information and settlement function and finish convention business management, session control function, and WEB user is provided service function;
Resource policy service is managed the resource of each MCU, and meeting is dispatched;
It is characterized in that,
Carry out communication by resource policy agreement or proprietary protocol between video conference business system and the resource policy system;
Carry out communication by Parlay API between video conference business system and the Parlay gateway;
Carry out communication by resource policy agreement or proprietary protocol between resource policy service system and the MCU;
Carry out communication by Session Initiation Protocol between MCU and the Parlay gateway;
Parlay gateway and Softswitch carry out communication by Session Initiation Protocol;
All multimedia terminals all are registered on the Softswitch.
2, the described video conference business operation system of claim 1 is characterized in that, described multimedia terminal is connected on the Softswitch by corresponding gateway.
3, the described video conference business operation system of claim 2 is characterized in that, H.323 terminal and Softswitch carry out communication by agreement H.323; H.320 terminal and Softswitch carry out communication by agreement H.320/H.323; Sip terminal and Softswitch carry out communication by Session Initiation Protocol.
4, the described video conference business operation system of claim 1 is characterized in that, described resource policy service and video conference business system lump together.
5, a kind of method of utilizing video conference business operation system to hold a meeting may further comprise the steps:
The user is by the preset conference of video conference business system;
The video conference business system passes to resource policy service with meeting information and carries out the resource affirmation;
Resource policy service reservation of resource and with result notification video conference business system;
The video conference business system orders MCU to begin meeting when meeting begins;
Video conference business system calling MCU;
MCU carries out call answering and with result notification video conference business system;
The video conference business system is by the Softswitch calling terminal;
Terminal is carried out call answering and is notified the video conference business system with the result through Softswitch;
The video conference business system is with the call answering result notification MCU of terminal, joining meeting to terminal.
6, the described method of utilizing video conference business operation system to hold a meeting of claim 5 is characterized in that, also comprises following step of carrying out meeting control:
The user is in the view control operation of the enterprising guild in the meeting control interface of video conference business system;
The video conference business system is with meeting control command notice MCU;
MCU carries out the meeting control command and with result notification video conference business system.
7, a kind of method of utilizing video conference business operation system to hold a meeting may further comprise the steps:
The user is by the terminal preset conference;
Terminal is notified the video conference business system with subscription information by Softswitch;
The video conference business system passes to resource policy service with meeting information and carries out the resource affirmation;
Resource policy service is to reservation of resource and with result notification video conference business system;
The video conference business system orders MCU to begin meeting when meeting begins;
Video conference business system calling MCU;
MCU carries out call answering and with result notification video conference business system;
The video conference business system by Softswitch with preset conference result notification terminal, and with joining meeting to terminal.
8, the described method of utilizing video conference business operation system to hold a meeting of claim 7 is characterized in that, also comprises following step of carrying out meeting control:
The user is in the view control operation of the enterprising guild of terminal interface;
Terminal is passed through Softswitch notice video conference business application system with the meeting control command;
The video conference business system is with meeting control command notice MCU;
MCU carries out the meeting control command and with result notification video conference business system;
The video conference business system notifies terminal with the result through Softswitch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100614102A CN101098449A (en) | 2006-06-28 | 2006-06-28 | Video conference business operation system and conference holding method |
| PCT/CN2006/003174 WO2008003188A1 (en) | 2006-06-28 | 2006-11-27 | Network connection method and network system for video conference service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100614102A CN101098449A (en) | 2006-06-28 | 2006-06-28 | Video conference business operation system and conference holding method |
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| Publication Number | Publication Date |
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| CN101098449A true CN101098449A (en) | 2008-01-02 |
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| CNA2006100614102A Pending CN101098449A (en) | 2006-06-28 | 2006-06-28 | Video conference business operation system and conference holding method |
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| CN (1) | CN101098449A (en) |
| WO (1) | WO2008003188A1 (en) |
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| CN101656746A (en) * | 2009-09-10 | 2010-02-24 | 中兴通讯股份有限公司 | Engine system and method for multimedia conference |
| WO2010078746A1 (en) * | 2009-01-09 | 2010-07-15 | 中兴通讯股份有限公司 | Method and system for multimedia conference operation charging |
| CN101227473B (en) * | 2008-01-28 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system of main control conference for multimedia communication system |
| CN101938363A (en) * | 2009-06-30 | 2011-01-05 | 中兴通讯股份有限公司 | Parlay gateway-based method for realizing conference telephone |
| CN102457698A (en) * | 2010-10-27 | 2012-05-16 | 深圳市誉融科技有限公司 | Video communication bridge-connection system and method |
| CN102916904A (en) * | 2012-11-01 | 2013-02-06 | 浙江省电力公司 | Power communication dispatching method |
| CN103238149A (en) * | 2010-10-15 | 2013-08-07 | 惠普发展公司，有限责任合伙企业 | Input/output communication |
| CN103369292A (en) * | 2013-07-03 | 2013-10-23 | 华为技术有限公司 | Call processing method and gateway |
| CN101742020B (en) * | 2008-11-10 | 2014-02-19 | 中兴通讯股份有限公司 | Method for charging multimedia conference |
| CN104380703A (en) * | 2012-05-18 | 2015-02-25 | 株式会社理光 | Transmission management system, transmission system, and transmission management system program |
| CN106572118A (en) * | 2016-11-13 | 2017-04-19 | 南京汉隆科技有限公司 | Multi-account and multi-line network telephone media service system and control method thereof |
| CN109389364A (en) * | 2018-09-20 | 2019-02-26 | 视联动力信息技术股份有限公司 | Conference reservation method, system and conference management platform |
| CN109729306A (en) * | 2019-01-17 | 2019-05-07 | 国家电网有限公司 | HD video conference dispatching system |
| CN109756694A (en) * | 2018-12-13 | 2019-05-14 | 视联动力信息技术股份有限公司 | A kind of communication connection method for building up and system based on view networking |
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| CN100409683C (en) * | 2004-08-10 | 2008-08-06 | 中兴通讯股份有限公司 | Method for holding video conference on video operation platform |
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| CN100407710C (en) * | 2004-08-31 | 2008-07-30 | 华为技术有限公司 | Network instant communication system and method for providing instant message subscribing |
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2006
- 2006-06-28 CN CNA2006100614102A patent/CN101098449A/en active Pending
- 2006-11-27 WO PCT/CN2006/003174 patent/WO2008003188A1/en active Application Filing
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| CN101227473B (en) * | 2008-01-28 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system of main control conference for multimedia communication system |
| CN101742020B (en) * | 2008-11-10 | 2014-02-19 | 中兴通讯股份有限公司 | Method for charging multimedia conference |
| WO2010078746A1 (en) * | 2009-01-09 | 2010-07-15 | 中兴通讯股份有限公司 | Method and system for multimedia conference operation charging |
| CN101938363B (en) * | 2009-06-30 | 2015-10-21 | 中兴通讯股份有限公司 | The method of conference telephone is realized based on Parlay gateway |
| CN101938363A (en) * | 2009-06-30 | 2011-01-05 | 中兴通讯股份有限公司 | Parlay gateway-based method for realizing conference telephone |
| CN101656746A (en) * | 2009-09-10 | 2010-02-24 | 中兴通讯股份有限公司 | Engine system and method for multimedia conference |
| CN103238149A (en) * | 2010-10-15 | 2013-08-07 | 惠普发展公司，有限责任合伙企业 | Input/output communication |
| CN102457698A (en) * | 2010-10-27 | 2012-05-16 | 深圳市誉融科技有限公司 | Video communication bridge-connection system and method |
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| US9450990B2 (en) | 2012-05-18 | 2016-09-20 | Ricoh Company, Limited | Transmission management system, transmission system, and transmission management system program |
| CN104380703A (en) * | 2012-05-18 | 2015-02-25 | 株式会社理光 | Transmission management system, transmission system, and transmission management system program |
| CN102916904A (en) * | 2012-11-01 | 2013-02-06 | 浙江省电力公司 | Power communication dispatching method |
| CN103369292B (en) * | 2013-07-03 | 2016-09-14 | 华为技术有限公司 | A kind of call processing method and gateway |
| CN103369292A (en) * | 2013-07-03 | 2013-10-23 | 华为技术有限公司 | Call processing method and gateway |
| US10291882B2 (en) | 2013-07-03 | 2019-05-14 | Huawei Technologies Co., Ltd. | Call processing method and gateway |
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| CN106572118A (en) * | 2016-11-13 | 2017-04-19 | 南京汉隆科技有限公司 | Multi-account and multi-line network telephone media service system and control method thereof |
| CN109389364A (en) * | 2018-09-20 | 2019-02-26 | 视联动力信息技术股份有限公司 | Conference reservation method, system and conference management platform |
| CN109756694A (en) * | 2018-12-13 | 2019-05-14 | 视联动力信息技术股份有限公司 | A kind of communication connection method for building up and system based on view networking |
| CN109729306A (en) * | 2019-01-17 | 2019-05-07 | 国家电网有限公司 | HD video conference dispatching system |
| CN113573006A (en) * | 2021-07-21 | 2021-10-29 | 北京融讯科创技术有限公司 | Special line video conference communication method, device, equipment and storage medium |
| CN113573006B (en) * | 2021-07-21 | 2024-04-05 | 北京融讯科创技术有限公司 | Special line video conference communication method, device, equipment and storage medium |
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| WO2008003188A1 (en) | 2008-01-10 |
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