CN101465919B - Method and system for implementing video conference - Google Patents
Method and system for implementing video conference Download PDFInfo
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- CN101465919B CN101465919B CN2007101799187A CN200710179918A CN101465919B CN 101465919 B CN101465919 B CN 101465919B CN 2007101799187 A CN2007101799187 A CN 2007101799187A CN 200710179918 A CN200710179918 A CN 200710179918A CN 101465919 B CN101465919 B CN 101465919B
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Abstract
The invention discloses a videoconference implementation method. User boxes are arranged for the users in a videoconference system. The method includes the steps that: all the user boxes and VCS in a multimedia service system are allocated with IP identifiers, and the IP identifiers of the user boxes are bound with PSTN numbers; a PSTN terminal bound with the IP identifiers initiates a PSTN call, PSTN connection is established between the PSTN terminal and a teleconference server, and voice data of the videoconference is transferred by making use of the PSTN connection; the VCS acquires the calling PSTN number, fixes on the IP identifier bound with the calling PSTN number, establishes IP connection with the user box represented by the IP identifier through a call control server, and transfers the video data through an IP network. The invention further discloses a videoconference system. The invention makes use of a current PSTN terminal to conduct videoconference service, thus enlarging the application range of videoconference service.
Description
Technical field
The present invention relates to multimedia communication technology, particularly the implementation method of video conference and system.
Background technology
At present, there is the voice conferencing of various ways on PSTN net and the IP network respectively, for example:
(1) PSTN net voice conferencing: set up the speech exchange platform of multi-party communication at the PSTN net, carry out the control of multi-party communication through telephone meeting server, communication terminal is the PSTN terminal;
(2) ip voice communication conference: the speech exchange platform of setting up the communication Multi-Party Conference through IP network; Carry out the control of multi-party communication through the MCU of IP network; Call terminal is based on the terminal of computer; Be the mode of PC to PC, because the increased functionality of communication terminal, the IP network voice communication video communication in many ways of can supporting simultaneously to communicate by letter.
Advantage based on the voice communication of PSTN net is: voice quality number; Possess mobility,, need not to be equipped with PC as long as correspondent possesses telephone terminal; Applicable surface is wider; And correspondent does not need online, can satisfy the demand that finds the other side at any time and any place, carries out communication.Not enough below but this communication mode exists: the conversation form is relatively more dull, lacks image and video mode, and the part telephone terminal also lacks the text communication function, and the operating function of most of telephone terminals is simple, lacks the operation interface of hommization.
Advantage based on the IP network voice communication is: the communication mode rich, except voice, communication modes such as video, image can also be provided, with remedy language, literal can not be expressed or situation beyond expression of words.The function of communication terminal is stronger, possesses the operation interface of hommization.But following deficiency is arranged also: voice communication quality can be because of the congested variation of IP network, and mobility is poor, and is higher to communication participant's specification requirement, need possess and can manipulate computer.
Summary of the invention
In view of this, the present invention provides the implementation method and the system of video conference, can utilize existing PSTN terminal to carry out the operation of video conference, enlarges the scope of application of video conference business.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of implementation method of video conference; In the video conferencing system that comprises videoconference server VCS, IP network, PSTN network, PSTN switching equipment, telephone meeting server and PSTN terminal; For each user is provided with being used for the process IP agreement and carrying out the subscriber box of coding and decoding video of linking to each other with IP network; Said telephone meeting server links to each other with the PSTN network, and this method comprises:
Be each subscriber box in the said multi-media service system and VCS difference distributing IP sign, and with the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal;
The PSTN terminal of binding IP sign is initiated PSTN as caller and is called out; Request adds the video conference of specifying the meeting-place; The PSTN switching equipment is set up PSTN and is connected between caller PSTN terminal and telephone meeting server; Telephone meeting server obtains the appointment meeting field information that caller PSTN terminal request adds, and this caller PSTN terminal is added said appointment meeting-place, utilizes said PSTN to connect the speech data of transmission of video meeting;
VCS obtains the call information that comprises caller PSTN number and appointment meeting field information; According to the preset subscriber box IP sign and the binding relationship of PSTN number; Confirm and the caller IP sign of caller PSTN number binding, set up IP through call control server with the subscriber box of said caller IP sign representative and be connected, and according to said appointment meeting field information; This subscriber box is added said appointment meeting-place, utilize the video data of said IP network transmission of video meeting.
A kind of video conferencing system, comprise videoconference server VCS, call control server, IP network, PSTN network, PSTN switching equipment, telephone meeting server, PSTN terminal and with the subscriber box of PSTN terminal binding;
Said PSTN terminal is used for add specifying through the PSTN call request video conference in meeting-place, and sets up PSTN between said telephone meeting server and is connected, and send speech data to said telephone meeting server, receives the speech data in the also displaying video meeting;
Said PSTN switching equipment is used to said PSTN terminal and sets up PSTN with said telephone meeting server and be connected;
Said telephone meeting server is used for the described request according to the transmission of said PSTN terminal, and said PSTN terminal is added said appointment meeting-place, utilizes the speech data that is connected the transmission of video meeting with the PSTN of said PSTN terminal room;
Said VCS; Be used to obtain the PSTN number and the appointment meeting field information at said PSTN terminal; And according to being the binding relationship that IP identifies and the PSTN number is set up that each subscriber box distributes in the network in advance; Confirm the subscriber box with said PSTN terminal binding, and set up IP through said call control server with said subscriber box and be connected, according to the appointment meeting field information of said telephone meeting server transmission; Said subscriber box is added said appointment meeting-place, utilize the video data of said IP network transmission of video meeting;
The subscriber box of said and said PSTN terminal binding is used to gather the local video transfer of data and gives said VCS, and receives, decodes and show the video data of the video conference that said VCS sends.
A kind of implementation method of video conference; In the video conferencing system that comprises videoconference server VCS, IP network, PSTN network, PSTN switching equipment, telephone meeting server and PSTN terminal; For each user is provided with being used for the process IP agreement and carrying out the subscriber box of coding and decoding video of linking to each other with IP network; Said telephone meeting server links to each other with IP network with the PSTN network, and this method comprises:
Be each subscriber box in the said multi-media service system and VCS difference distributing IP sign, and with the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal;
The PSTN terminal of binding IP sign is initiated PSTN as caller and is called out; The request holding video conference; The PSTN switching equipment is set up PSTN and is connected between caller PSTN terminal and telephone meeting server; With the idle meeting-place that caller PSTN terminal adding system reserves, create the PSTN territory meeting in said meeting-place; Caller PSTN imports at the terminal PSTN number at least one called PSTN terminal successively; Trigger telephone meeting server and call out said called PSTN terminal; The PSTN switching equipment is that telephone meeting server is set up PSTN with the called PSTN terminal of replying and is connected; The called PSTN terminal that telephone meeting server will be replied adds said meeting-place, utilizes each PSTN to connect the speech data of this meeting-place video conference of transmission;
Telephone meeting server sends to VCS through IP network with caller PSTN terminal and the PSTN number at said called PSTN terminal of replying and the information in said meeting-place;
VCS is according to the information in said meeting-place; Create the IP territory meeting in said meeting-place; And according to the preset subscriber box IP sign and the binding relationship of PSTN number, confirm and the IP sign of each PSTN number binding that receives, set up IP through call control server with the subscriber box of said each IP sign representative and be connected; Said subscriber box is added said meeting-place, utilize the video data of said this meeting-place video conference of IP network transmission.
A kind of video conferencing system, comprise VCS, call control server, IP network, PSTN network, PSTN switching equipment, telephone meeting server, caller PSTN terminal, at least one called PSTN terminal, respectively with the subscriber box of caller and called PSTN terminal binding;
Said caller PSTN terminal; Be used for through PSTN call request holding video conference; With set up PSTN between said telephone meeting server and be connected; And import the PSTN number at all called PSTN terminals successively, send speech data to said telephone meeting server, receive and the displaying video meeting in speech data;
Said PSTN switching equipment is used to said caller PSTN terminal and all called PSTN terminals and sets up PSTN and be connected respectively with between the said telephone meeting server;
Said telephone meeting server is used for said caller PSTN terminal and the idle meeting-place that all called PSTN terminal adding systems reserve are utilized the speech data that is connected the transmission of video meeting with the PSTN of each PSTN terminal room; And the PSTN number at said caller PSTN terminal and all called PSTN terminals and the information in said meeting-place sent to said VCS through said IP network;
Said VCS; Be used to receive the caller PSTN terminal of said telephone meeting server transmission and the PSTN number at all called PSTN terminals; And according to being the binding relationship that IP identifies and the PSTN number is set up that each subscriber box distributes in the network in advance; Confirm each subscriber box with each PSTN terminal binding, and set up IP through said call control server with said each subscriber box and be connected, according to the meeting field information of said telephone meeting server transmission; Said each subscriber box is added said meeting-place, utilize the video data of said IP network transmission of video meeting;
The subscriber box of said and caller PSTN terminal binding and with each subscriber box of each called PSTN terminal binding, be used to gather the local video transfer of data and give said VCS, and receive, decode and show the video data of the video conference that said VCS sends.
Visible by technique scheme; Video conferencing system among the present invention comprises videoconference server (VCS), call control server, IP network, PSTN network, PSTN switching equipment, telephone meeting server and PSTN terminal; The subscriber box that links to each other with IP network is set for each user; And be VCS and each subscriber box difference distributing IP sign; With the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal, thereby make subscriber box set up corresponding relation with the PSTN terminal in the PSTN network.When telephone meeting server receives the PSTN that the PSTN terminal of having bound the IP sign sends when calling out; The PSTN switching equipment is connected setting up PSTN between caller PSTN terminal and the telephone meeting server; Telephone meeting server obtains the appointment meeting field information that caller PSTN terminal request adds; And this caller PSTN terminal added said appointment meeting-place, utilize PSTN to connect the speech data of transmission of video meeting.VCS obtains caller PSTN number and appointment meeting field information from the PSTN network; According to the binding relationship of subscriber box IP sign with the PSTN number; Confirm caller IP sign with caller PSTN number binding; Set up IP through call control server with the subscriber box of caller IP sign representative and be connected, and this subscriber box is added the appointment meeting-place, utilize the video data of IP network transmission of video meeting.By the way; Arbitrarily video conference service can be inserted in the PSTN terminal, and between PSTN terminal and telephone meeting server, sets up PSTN respectively and be connected, and between subscriber box and VCS, sets up IP and is connected; Thereby can utilize PSTN Network Transmission speech data, utilize the IP network transmitting video data.
Perhaps; In above-mentioned video conferencing system; Also can initiate PSTN as caller by the PSTN terminal of binding IP sign and call out, request holding video conference, PSTN switching equipment are set up PSTN and are connected between caller PSTN terminal and telephone meeting server; With the idle meeting-place that caller PSTN terminal adding system reserves, create the PSTN territory meeting in said meeting-place; Caller PSTN imports at the terminal PSTN number at least one called PSTN terminal successively, triggers telephone meeting server and calls out each called PSTN terminal, and it is added said meeting-place, and utilizes each PSTN to connect the speech data of this meeting-place video conference of transmission; And, the PSTN number at caller and called PSTN terminal is sent to VCS; After VCS receives the PSTN number; Promptly create the IP territory meeting in said meeting-place; And, search the IP sign of each PSTN number binding, and set up IP with the subscriber box of each IP sign representative and be connected according to preset binding relationship; It is added said meeting-place, utilize the video data of said this meeting-place video conference of IP network transmission.By the way; Caller PSTN terminal can be called out through PSTN and held the video conference of participating in many ways; And between PSTN terminal and telephone meeting server, set up PSTN respectively and be connected; Between subscriber box and VCS, set up IP and be connected, thereby can utilize PSTN Network Transmission speech data, utilize the IP network transmitting video data.
In the video conference implementation method of above-mentioned dual mode; Made things convenient for video conference user's use on the one hand; The operation of video conference business is carried out at the PSTN terminal that makes full use of existing telecommunications network; Enlarge the scope of application of video conference business, broken through the use bottleneck of video conference terminal, obtained more rich video data through IP network on the other hand.
Description of drawings
Fig. 1 is the overall construction drawing of video conferencing system among the present invention.
Fig. 2 is the concrete structure figure of subscriber box among the present invention.
Fig. 3 is the overview flow chart based on first kind of video conference implementation method of video conferencing system shown in Figure 1.
Fig. 4 is the overview flow chart based on second kind of video conference implementation method of video conferencing system shown in Figure 1.
Fig. 5 is the networking structure figure of automatic video frequency conference system.
Fig. 6 is in first kind of video conference implementation method, immediate meeting business realization method particular flow sheet.
Fig. 7 is the concrete structure figure that possesses the subscriber box of one road decoding capability.
Fig. 8 is the concrete structure figure that possesses the subscriber box of N road decoding capability.
Fig. 9 is the networking structure figure of artificial video conferencing system.
Figure 10 is in first kind of video conference implementation method, the implementation method particular flow sheet of reservation video conference.
Figure 11 is the particular flow sheet of second kind of video conference implementation method.
Embodiment
For making the object of the invention, technological means and advantage clearer, the present invention is explained further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: combine PSTN to connect and IP network realization video conference business.
Fig. 1 is the overall construction drawing of video conferencing system among the present invention.This video conferencing system comprises IP network, PSTN network, VCS, call control server, PSTN terminal, PSTN switching equipment, telephone meeting server and subscriber box.Wherein, subscriber box links to each other with IP network, and telephone meeting server links to each other with the PSTN network.The PSTN terminal is meant the employed terminal of public switch telephone network, comprises telephone terminal, Personal Handyphone System(PHS) terminal (Personal Handyphone System), public mobile telephone terminal (mobile phone) etc.; The PSTN switching equipment is meant the switching equipment of realizing the PSTN function of exchange, comprises traditional digital SPC exchange equipment, Softswitch etc.
In this video conferencing system, the structure of subscriber box is as shown in Figure 2, comprises IP network interface unit, IP protocol processing unit, image acquisition units, video decoding unit and video interface unit.Wherein, the IP network interface unit is used for linking to each other with IP network; The IP protocol processing unit that links to each other with the IP network interface is used for receiving and the process IP bag, and data behind the coding of IMAQ coding unit transmission are broken into the IP bag, transfers out through the IP network interface; The IMAQ coding unit sends to the IP protocol processing unit after being used to gather local image encoding; Video decoding unit is used to receive data behind the video coding that the IP protocol processing unit handled, carry out video decode after, on the display device that the video interface unit outputs to subscriber box links to each other.This subscriber box can be the set that has realized the above-mentioned functions unit, can independently use or be embedded in other the equipment.
Based on above-mentioned video conferencing system shown in Figure 1, the invention provides two kinds of video conference implementation methods.Wherein, first kind of video conference implementation method is the mode of at present more common appointment meeting-place holding video conference based on initial registration.In this mode, after PSTN dialed at the terminal preset PSTN number, the other-end incoming call behind the entering meeting-place, was waited in the meeting-place (being the meeting room number) of input registered in advance, holds a meeting.
Another kind of video conference implementation method is to import a plurality of called PSTN termination numbers respectively by a caller PSTN terminal, thus the mode of convening each called PSTN terminal to hold a meeting.
Fig. 3 is the overview flow chart based on first kind of video conference implementation method of video conferencing system shown in Figure 1.As shown in Figure 3, this method specifically may further comprise the steps:
Wherein, As previously mentioned, the PSTN terminal is meant the employed terminal of public switch telephone network, comprises telephone terminal, Personal Handyphone System(PHS) terminal (Personal Handyphone System), public mobile telephone terminal (mobile phone) etc.; The PSTN number at PSTN terminal can be area code+telephone number, also can be phone number etc.
So far,, and set up the voice channel of video conference, can utilize PSTN to connect reception and transmission speech data, thereby utilized the quality-advantage of PSTN Network Transmission speech data for the video conference in meeting-place is specified in the access of caller PSTN terminal.
Difference according to video service system realizes that VCS obtains the mode that comprises the caller PSTN number and the call information of appointment meeting field information can be different.For example, in the automatic video frequency conference system, can send call information to VCS by telephone meeting server; In artificial video conferencing system, can send call information to VCS by the traffic seat.In a word, VCS can obtain call information from the equipment the PSTN network.
So far,, and set up the video channel of video conference, can utilize IP network to receive and the transmission video data, thereby utilized the superiority bandwidth of IP network transmitting video data for the subscriber box with caller PSTN terminal binding inserts the video conference of specifying the meeting-place.
Fig. 4 is the overview flow chart based on second kind of video conference implementation method of video conferencing system shown in Figure 1.As shown in Figure 4, this method specifically may further comprise the steps:
Step 401 is each subscriber box and the VCS difference distributing IP sign in the video conferencing system in advance, and with the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal.
In this method, caller PSTN terminal need not the meeting-place of registered in advance video conference, when initiating PSTN call request holding video conference, selects an idle meeting-place automatically by system, is used for holding video conference.
So far; For inserting video conference in the called PSTN terminal of caller PSTN terminal and each answering call; And set up the voice channel of video conference, can utilize PSTN to connect reception and transmission speech data, thereby utilize the quality-advantage of PSTN Network Transmission speech data.
Step 404, telephone meeting server be through itself and being connected of IP network, with the PSTN number at caller PSTN terminal and the called PSTN terminal of replying with understand field information and send to VCS.
So far; For the subscriber box with caller PSTN terminal and each called PSTN terminal binding of replying inserts the video conference of specifying the meeting-place; And set up the video channel of video conference; Can utilize IP network to receive and the transmission video data, thereby utilize the superiority bandwidth of IP network transmitting video data.
Above-mentioned being to overview of the present invention.At present, video conference is divided into two kinds of immediate meeting and preset conferences.Wherein, after immediate meeting is meant the special service number of dialing video conference, hold the appointment meeting immediately; Preset conference is meant that the special service number of dialing video conference carries out conference reservation, and in the time of meeting, Conference server can make a call to each terminal of attending a meeting, and holds the appointment meeting.
First kind of video conference implementation method of the present invention can support all that to above-mentioned two kinds of conference type according to the difference of particular type, the practical implementation meeting of this video conference implementation method is difference to some extent; In addition, when initiating the video conference in PSTN call request adding appointment meeting-place at caller PSTN terminal, can set up PSTN through the mode that automatic access or seat insert and connect, and correspond respectively to automatic video frequency conference system and artificial video conferencing system.The practical implementation process of first kind of video conference implementation method is described through specific embodiment below.
In implementation process of the present invention, the IP establishment of connection can select any control protocol to carry out as required, in the specific embodiment of the present invention below, all with Session Initiation Protocol as the call control protocol in the IP network.
At first, through embodiment one, in first kind of video conference implementation method, the embodiment of the immediate meeting flow process in the automatic video frequency conference system describes in detail.
Embodiment one:
In the automatic video frequency conference system of present embodiment, system constitutes identical with Fig. 1.Further, comprise the IP protocol processing unit in the telephone meeting server, be used to carry out the processing of IP agreement, insert IP network.Communicate the control information in the interactive video conference process etc. through proprietary protocol between the IP protocol processing unit in this telephone meeting server and the VCS of IP network based on the Transmission Control Protocol exploitation.
Present embodiment describes in detail to the implementation method idiographic flow of immediate meeting.This method can be implemented in networking structure shown in Figure 5, and is as shown in Figure 5, and this networking structure comprises PSTN network portion and IP network part.Wherein, PSTN partly comprises PSTN terminal, PSTN network, PSTN switching equipment and ivr server; IP section comprises subscriber box, IP network, sip server and VCS.Wherein, sip server is the call control server among Fig. 1, because the control protocol in the present embodiment is a Session Initiation Protocol, so call control server is sip server; Ivr server is the concrete realization of the telephone meeting server among Fig. 1; Be used to control the meeting in PSTN territory, and this ivr server comprises the IP protocol processing unit, be used to carry out the processing of IP agreement; And link to each other with IP network; The packet of transmitting-receiving in the IP network, and and the VCS of IP network between communicate the control information in the interactive video conference process etc. through proprietary protocol based on the Transmission Control Protocol exploitation.VCS is used to carry out the control of IP territory meeting.
In networking structure shown in Figure 5, the implementation method idiographic flow of instant video meeting is as shown in Figure 6.In the related procedure of present embodiment video conference; Through dialing preset PSTN meeting special service number; Insert the application of video conference; And in the PSTN network, be provided with: the PSTN terminal of PSTN meeting special service number representative is an ivr server, is used for the Conference server as the PSTN territory, and PSTN meeting special service number corresponding service is a video conference business.The concrete method flow of video conference of realizing comprises:
Step 601 is subscriber box and the VCS distributing IP sign in the network in advance, and the IP of each subscriber box is identified and at least one PSTN number binding.
The control protocol that adopts in the present embodiment is initial session protocol (SIP); The IP sign of distributing for subscriber box is specially SIP unified resource identifier (URI) (hereafter is URI); The IP of subscriber box sign can be that subscriber box is provided with and is kept in the subscriber box when dispatching from the factory; Perhaps, also can, distribute subscriber box before using through activation manipulation.
The user can bind at least one PSTN number for subscriber box as required, and after binding, the PSTN terminal of these PSTN numbers can utilize the video data of this subscriber box from the meeting of IP network receiver, video.The PSTN number that subscriber box is bound can be set when subscriber box dispatches from the factory, and also can before subscriber box uses, be provided with through activation manipulation.
Specifically realize above-mentioned distributing IP sign through activation manipulation and set up binding relationship mode can for: the user dials the special service number of excited users box through any PSTN terminal; The visit activation server; Through this PSTN terminal the sequence number of subscriber box is sent to activation server (specifically can be TR069); Activation server is this subscriber box Random assignment IP sign; This IP is identified at subscriber box of unique identification in the IP network, and the IP identification feedback that will distribute gives the PSTN terminal, and the user is kept at it in corresponding subscriber box.Activation server also receives the PSTN number of user through the binding of PSTN terminal input, sets up binding relationship between at least one the PSTN number for the IP sign of subscriber box and input, and this binding relationship is kept in the addressing server activation manipulation completion.Preferably; For improving the reliability of system, activation server can also further distribute the authentication values with the corresponding setting of this URI when identifying for the subscriber box distributing IP; When the later use subscriber box is set up the IP connection, can utilize this authentication values to carry out the authentication of subscriber box.
Step 602 is carried the sip server of URI in network of self and is sent the SIP register requirement after subscriber box powers on, register.
In this step; After subscriber box powers on, send the SIP register requirement, and in this register requirement, carry the URI that self preserves and the back assigned IP address that powers on to sip server; Sip server extracts the URI and the IP address of wherein carrying, and sets up corresponding relation for it.
If the process of corresponding above-mentioned steps 601 when being IP terminal distribution URI, has also further been distributed corresponding authentication values, in this step, also need in register requirement, carry this authentication values; Sip server carries out authentication according to being the URI of certain IP address assignment and the corresponding relation of authentication values in the step 601 to this register requirement, if authentication is passed through, utilizes aforesaid way to set up the corresponding relation of URI and IP address, succeeds in registration; If failed authentication then to the information of this IP terminal feedback failed authentication, and abandons this register requirement.
Through behind the said process, preferably, can regularly carry out registration operation, so that keep up-to-date IP address of this subscriber box and the corresponding relation between URI in the sip server.After subscriber box was accomplished registration, the user can and insert video conference business through the PSTN terminal request of binding with subscriber box, utilize subscriber box to receive and the display video meeting in video data, utilize the PSTN terminal to receive and the displaying video meeting in speech data.
Usually, in immediate meeting, the user inserts video conference business through the PSTN terminal possibly relate to two flow processs, is respectively the video conference visioning procedure and adds flow process.Usually, the video conference visioning procedure by user's triggering in first entering meeting-place, is created meeting of PSTN territory and the meeting of IP territory respectively through telephone meeting server (being ivr server in the present embodiment) and VCS; Video conference adds flow process; After the PSTN territory meeting in certain meeting-place and the meeting of IP territory have been created; The user of follow-up access corresponding meeting-place video conference; Initiate video conference and add flow process, respectively the user who inserts is added meeting of PSTN territory and the meeting of IP territory by telephone meeting server (being ivr server in the present embodiment) and VCS.
Particularly, the user comprises through the video conference visioning procedure of PSTN terminal triggering:
Step 603, the user passes through the PSTN meeting special service number that certain PSTN terminal A dials video conference arbitrarily.
In the present embodiment, suppose that the PSTN special service number of first kind of video conference implementation method is 1687-7777, in the video conference business, called PSTN number promptly refers to the special service number of video conference.Caller PSTN terminal can be the PSTN terminal of binding with the IP sign, also can be the PSTN terminal that does not have binding, does not influence enforcement of the present invention.
Step 604, the PSTN meeting special service number that the PSTN switching equipment is dialed according to PSTN terminal A calls out this PSTN to the access ivr server, is connected for PSTN terminal A sets up PSTN with ivr server.
Step 605; Ivr server confirms that according to the meeting special service number user asks video conference service, to user's playing voice prompting, and the information of caller PSTN terminal input request immediate meeting; Ivr server carries out authentication to caller PSTN terminal, and is verifying that successfully next step is carried out in the back.
Usually, ivr server can require the information of PSTN terminal input immediate meeting or preset conference.After the information of the request immediate meeting that receives user's input, ivr server can require the PSTN terminal to import the information of attending a meeting, and comprises and specifies meeting-place and password, wherein specifies the meeting-place promptly to refer to the meeting room that this user gets into.Ivr server is compared according to the meeting field information and the prestored information that receive, determines whether to be validated user, if the disabled user removes the PSTN that sets up and connects.
Step 606; Ivr server confirms that caller PSTN terminal gets into the PSTN terminal in this meeting-place for first; Receive this PSTN terminal and connect transmission conference parameters, comprise parliamentary dimension, require the called PSTN number of ivr server active invite participation meeting etc. to ivr server through the PSTN that sets up.
Step 607, ivr server are created the meeting in PSTN territory according to conference parameters.
The conference creation process in PSTN territory is identical with existing mode in this step, promptly carries out resource reservation etc.If comprise the PSTN terminal of attending a meeting of appointment in the conference parameters, then ivr server is called out the PSTN number at each PSTN terminal of attending a meeting, and behind the called off-hook, has promptly set up ivr server and has been connected with the PSTN of the PSTN terminal room of this off-hook.Wherein, the PSTN terminal of attending a meeting can be the PSTN terminal of having bound the IP sign, also can be the PSTN terminal that does not have the binding IP sign.
After creating the meeting in PSTN territory, promptly can carry out the transmission of video conference speech data.Usually, if do not have chairman in several PSTN terminal of inserting, then ivr server gets into the preset audio file of PSTN terminal plays in meeting room for each; If there is chairman, execution in step 608 voice data transmission of carrying out meeting then.
The speech data that step 608, ivr server receive each PSTN terminal collection that participates in a conference carries out playing to corresponding PSTN terminal behind the audio mixing, and play the audio mixing data that the PSTN switching equipment issues at the PSTN terminal.
In this step; The audio mixing operation is identical with existing mode; Promptly, other speech data except that the speech data that this PSTN terminal A gathers in the speech data of each PSTN terminal collection that participates in a conference is carried out audio mixing, play to this PSTN terminal A for any PSTN terminal A.
So far, the transmission that the lang sound data of going forward side by side has been set up in the meeting in PSTN territory in the video conference.Set up the foundation that process is carried out following IP territory meeting synchronously with the meeting in above-mentioned PSTN territory:
Step 609, ivr server is with sending to VCS through IP network in the conference parameters adding call information that receives.
Step 610, the conference parameters that VCS sends according to ivr server is created the meeting in IP territory.
In this step, the conference creation process in IP territory is identical with existing mode, also is to carry out resource reservation etc.If comprise the PSTN terminal of attending a meeting of appointment in the conference parameters; Then the IP of the PSTN number binding at addressing server lookup these the PSTN terminals of VCS in network identifies; And according to these IP signs; Set up IP to the sip server request subscriber box corresponding with it and connect, sip server is confirmed the corresponding IP address of PSTN number of carrying in the conference parameters according to URI that preserves and the corresponding relation between the IP address; And set up IP with VCS respectively for the corresponding subscriber box in these IP addresses and be connected.Connect when setting up at IP, also carry out the SIP negotiations process, and through this negotiations process, VCS obtains each and sets up the video decoding capability that subscriber box possessed that IP is connected with it, be i.e. the audio/video decoding unit video way N that can decode.Concrete SIP negotiations process conformance with standard Session Initiation Protocol just repeats no more here.
After creating the meeting in IP territory, promptly can carry out the transmission of video data in the meeting.Usually, if do not have chairman in several IP terminal of inserting, then VCS gets into the preset video file of IP terminal plays in meeting room for each, or does not issue video flowing; If there is chairman, then begin to carry out the video Data Transmission that next step carries out meeting.
As previously mentioned, the PSTN terminal that comprises in the conference parameters can be the PSTN terminal of binding IP sign, also can be the PSTN terminal that does not have the binding IP sign; Set up IP according to the mode of foregoing description with VCS for the former and be connected transmitting video data; Must fail when inquiry IP identifies for the latter; Then do not set up IP and connect, this PSTN terminal only exists PSTN to be connected with ivr server, can send and receive speech data.
Step 611; VCS receives the local video data behind the coding that all subscriber box of attending a meeting send through each IP network; And according to the media capability of each subscriber box that participates in a conference, the video image after each subscriber box issues corresponding other at least one subscriber box coding.
In the present embodiment, subscriber box is supported the decoding of one road video data at least, as previously mentioned, connects VCS and carries out SIP with subscriber box and consult setting up SIP, and in this SIP negotiations process, VCS can be known the decoding way of the concrete support in IP terminal.According to the different video data way that subscriber box is supported, the video data that VCS issues to this subscriber box maybe be different, below with one the tunnel with the N road be that example describes.
If certain subscriber box A only supports the decoding of one road video data, when VCS when this subscriber box A issues video data, preferably chairman's subscriber box is gathered and coding after the local video data distributing give this subscriber box A.
If certain subscriber box B supports the decoding of N road video data, when VCS when this subscriber box B issues video data, concrete operations are following: at first, receive that all subscriber box are gathered and coding after the local video data; Then; In all subscriber box, select N subscriber box; And wherein preferably include chairman's subscriber box, N subscriber box of VCS selection transmits the video data after encoding in the N road altogether so, to this N road video data; In the video data of every road, add distinguishing identifier respectively, be used for distinguishing video data and belong to which of N road; At last, VCS will add the sign after N road video data be handed down to this subscriber box B through the IP network between VCS and this subscriber box B.
Visible by this step; It is obviously different that VCS in the present embodiment and existing video conference controller exist, and when carrying out the issuing of multi-channel video image, it is no longer as existing video conference controller; Earlier with being organized as the road vision signal that shows on the screen behind the multichannel video decoding; To issuing behind this road video signal coding, synthesize the operation of coding again after the VCS in the present embodiment can no longer decode, but directly carry out the forwarding of encoded video data again; Alleviate the processing burden of VCS so greatly, increased the capacity of the video conferencing system that VCS supported.
Step 612, each subscriber box reception, decoding and the video image that self receives through the display device demonstration.
To the subscriber box that possesses different decoding capabilities, the concrete operations of this step are difference to some extent.Still with support one the tunnel with the subscriber box of N road decoding be example, for the subscriber box of only supporting one road video decode, directly the encoded video data that receives is decoded, and shows through coupled display device; For the subscriber box of supporting N road video decode; Receive the encoded video data on N road; And this N road video data decoded respectively; Decoded image sets is made into a screen size, shows, and wherein preferably comprise the local video of chairman's subscriber box at least through coupled display device.
Above-mentioned possess one the tunnel with the structure of the subscriber box of N road decoding capability specifically respectively like Fig. 7 and shown in Figure 8.Compare with subscriber box shown in Figure 2, the concrete structure to video decoding unit in Fig. 7 and the subscriber box shown in Figure 8 has carried out refinement.
For the subscriber box that possesses one tunnel decoding shown in Figure 7, its video decoding unit comprises a video decode subelement.Wherein, the video decode subelement is used to receive IP protocol processing unit processed video data, carry out video decode after, output to the display device that links to each other with subscriber box through the video interface unit.
For the subscriber box that possesses the decoding of N road shown in Figure 8, its video decoding unit comprises that N video decode subelement and one close the way unit.Wherein, arbitrary video decode subelement is used for all video datas after the IP protocol processing unit is handled, and extracts a road corresponding video data according to the distinguishing identifier in the video data, and closes the way unit to exporting to behind this road video data decoding.
Closing the way unit, N the decoded data set of video decode subelement that receives is made into a screen size, is that unit exports synchronously with the frame.Specifically organize the mode of video data to be, the decoded data of each video decode subelement are carried out N times of down-sampling, be organized as piece image output then; Perhaps, also can be directly decoded N road video data to be spliced into piece image output.
So far; The meeting that phonological component in the video conference passes through the PSTN territory is transmitted in the PSTN terminal of each conference participation and is play; The meeting that video section passes through the IP territory is transmitted in the subscriber box of each conference participation; On display device, play, for any user, just experienced video conference business.
Here need to prove that the establishment and the voice transfer of above-mentioned PSTN territory meeting with the establishment and the video transmission of IP territory meeting, are carried out for parallel.
Carry out in the process in instant video conference, have other uninvited user C and hope to add this meeting, promptly trigger video conference and add flow process, specifically comprise:
Step 613, the PSTN terminal D of user C are dialed preset PSTN meeting special service number, and the PSTN switching equipment should be called out and insert ivr server, set up PSTN and connect, and carry out voice suggestion and password authentification, and checking is through then carrying out next step.
Step 614; Ivr server adds the PSTN terminal of new incoming call the meeting in PSTN territory; When carrying out voice data transmission; The sound mixing that gather at this PSTN terminal is gone among the audio mixing result at former each PSTN terminal, issue the audio mixing result that speech data is gathered at other all PSTN terminals to this PSTN terminal; Ivr server has new user to add video conference, and carries this new user's PSTN number through IP network notice VCS, and VCS is that VCS and this user's subscriber box is set up IP and is connected the transmission of video data during the guild that goes forward side by side discusses through sip server.
When the user hoped to withdraw from this video conference, the flow process that withdraws from of present embodiment comprised:
Step 615; The PSTN hanging up terminal, ivr server is received on-hook signal, and this PSTN terminal is deleted from the meeting of PSTN territory; And the IP that passes through this PSTN number binding of IP network notice VCS deletion identifies the subscriber box of representative; VCS confirms to withdraw from the corresponding subscriber box in PSTN terminal of PSTN territory meeting according to the PSTN number of the subscriber box of the attending a meeting correspondence of self preserving, and this subscriber box is deleted from the meeting in IP territory.
By the way, realized the keep-alive connection.Specifically, when the IP network status transmission is relatively poor, certain user possibly lose with VCS between IP be connected, for this user, subscriber box has withdrawed from the meeting of current IP territory, can't receive the video data in the meeting; But the PSTN terminal of at this moment binding with the IP of this subscriber box sign is still in the meeting of PSTN territory; Still can pass through the speech data that the PSTN terminal receives meeting; After the Network Transmission situation took a turn for the better, VCS can also set up IP with this subscriber box with VCS and be connected according to the subscriber box information in the meeting of wherein writing down again; And insert corresponding meeting-place, continue as the conference service that this user provides the IP territory.Than the existing video conference that realizes the audio, video data transmission fully in the IP territory, improved the reliability of meeting, even the IP network situation is abominable, still can connects and listen to conference content through PSTN, improved user experience greatly.
All participants all withdraw from room number in meeting, and the meeting in IP territory and PSTN territory is all deleted.So far, the realization flow of a video conference finishes.
So far, the idiographic flow of the instant video meeting implementation method in the present embodiment finishes.Can find out by above-mentioned flow process, adopt the mode of present embodiment, can be through the operation at simple PSTN terminal, user's operation has been simplified in the foundation of realization instant video meeting and adding etc. greatly.Simultaneously, voice are in the PSTN transmission through network, than existing video conference based on simple IP network; Can guarantee the transmission quality of voice; Be applied as main video conference business for telephone type, improved user's the sense of hearing greatly and experienced, guaranteed good visual experience simultaneously; Than the existing videoconference that connects based on simple PSTN, realized by audio frequency seamlessly transitting to audio frequency and video.
Said process is that example is introduced with the called free time, if called PSTN terminal is just in other connect, the PSTN of caller connects and will inevitably be rejected so; At this moment ivr server can be busy through this called PSTN terminal of IP network notice VCS, and VCS is no longer to initiating the IP connection request with the subscriber box of this called PSTN terminal binding.
Perhaps; Also can continue to initiating the IP connection request by VCS with the subscriber box of called PSTN terminal binding; Called subscriber's box idle and receive this IP connection request after; With display device that called subscriber's box links to each other on show the information that other calls out incoming call, the user can finish current voice call this moment as required, inserts the PSTN and the SIP incoming call of incoming call; Perhaps, accept the SIP incoming call separately, set up simple IP with the other side and be connected, pass video data mutually; Perhaps, refusal voice and SIP incoming call finish this time calling procedure.
Above-mentioned is to realizing the flow process that possesses of video conference on the automatic video frequency conference system.Realization on artificial video conferencing system is slightly different.At first, Fig. 9 is the concrete networking structure of artificial video conferencing system.Compare with Fig. 5; Further comprise at least one traffic seat in the PSTN network portion in this networking structure, and the traffic seat also further comprises the IP protocol processing unit except that the function that possesses traditional P STN traffic seat; Be used to carry out the processing of IP agreement; Link to each other with IP network, the packet of transmitting-receiving in the IP network, and and the VCS of IP network between communicate through proprietary protocol based on the Transmission Control Protocol exploitation.
Secondly, the realization flow of video conference is compared with realization flow shown in Figure 6 in artificial video conferencing system shown in Figure 9, connects at PSTN and sets up on the mode that is connected foundation with IP difference to some extent.Particularly, the following steps of creating in the video conference flow process in the flow process shown in Figure 6 are carried out modify:
One, relating to the modification that PSTN is connected the process of setting up comprises:
Step 603 correspondence is revised as: the user dials the special clothes of video PSTN number through certain PSTN terminal A arbitrarily; The PSTN number that the PSTN switching equipment is dialed according to PSTN terminal A calls out this PSTN to the arbitrary traffic seat B of access;
Step 604 correspondence is revised as: the traffic seat B that answers the PSTN calling of PSTN terminal A confirms the video conference in the appointment meeting-place that A request in PSTN terminal adds, and carries out authentication to caller PSTN terminal, and is verifying successfully back execution in step 605;
Step 605 correspondence is revised as: traffic seat B inquires about to ivr server according to the appointment meeting field information of user's input; When definite this PSTN terminal A gets into this meeting-place behind first PSTN terminal; Receive PSTN terminal A input and work as conference parameters, comprise parliamentary dimension, require the called PSTN number of ivr server active invite participation meeting etc.
Step 606 correspondence is revised as: traffic seat B be PSTN terminal A with ivr server between set up PSTN and be connected, and the conference parameters that receives is sent to ivr server through IP network.
Two, relating to the modification that IP is connected the process of setting up comprises:
Step 609 correspondence is revised as: traffic seat B sends to VCS with call information through IP network, and said call information comprises the PSTN number of PSTN terminal A and the conference parameters of input.
Step to video conference in the flow process shown in Figure 6 adds in the flow process is made following corresponding the modification:
Relate to the establishment of connection to PSTN, step 613 correspondence is revised as: the PSTN terminal D is dialed Video service PSTN number, and arbitrary traffic seat E answers this PSTN and calls out; The input of traffic seat E prompting PSTN terminal D is specified can field information, and sets up PSTN for the PSTN terminal D with ivr server and be connected, and said appointment meeting field information is sent to ivr server; Ivr server adds the PSTN territory meeting of specifying the meeting-place, the voice data transmission of carrying out video conference with the PSTN terminal D;
Relate to establishment of connection to IP; Step 614 correspondence is revised as: traffic seat E will comprise that the PSTN number of PSTN terminal D and the call information of appointment meeting field information send to VCS; The VCS inquiry identifies with the IP of the PSTN number binding of PSTN terminal D; And through sip server to be VCS set up IP with the subscriber box of the IP sign representative that inquires is connected, carry out the transmission of video data in the meeting.
Except that aforesaid operations, identical with corresponding operating shown in Figure 6 based on all the other operations in the video conference realization flow of artificial video conferencing system, for example, the transmission of video data and voice data etc. are just repeated no more here.
Next, the embodiment through two pairs of preset conference flow processs of embodiment describes in detail.
Embodiment two:
Present embodiment describes in detail to the implementation method idiographic flow of preset conference.This method also can be implemented in automatic video frequency conference system shown in Figure 5.The implementation method idiographic flow of reservation video conference is shown in figure 10, comprising:
Step 1001～1002 are subscriber box and the VCS distributing IP sign in the network in advance, and the IP of each subscriber box is identified and at least one PSTN number binding; Carry the sip server of URI in network of self after subscriber box powers on and send the SIP register requirement, register.
The operation of above-mentioned steps 1001～1002 is identical with the operation of step 601～602 among the embodiment one, just repeats no more here.
Usually, in preset conference, need at first carry out conference reservation, preengage successfully after, according to the reservation information, at the appointed time hold a meeting.Therefore, the user inserts video conference business through the PSTN terminal possibly relate to three flow processs, is respectively video conference reservation flow process, visioning procedure and adding flow process.Usually, video conference reservation flow process can be triggered by any user, and the relevant parameter of preset conference is set in telephone meeting server (being ivr server in the present embodiment) and VCS; After preengaging successfully, the video conference visioning procedure is triggered by telephone meeting server (being ivr server in the present embodiment) and VCS automatically, creates meeting of PSTN territory and the meeting of IP territory respectively; Video conference adds flow process; After the PSTN territory meeting in certain meeting-place and the meeting of IP territory have been created; The user of follow-up access corresponding meeting-place video conference; Initiate video conference and add flow process, respectively the user who inserts is added meeting of PSTN territory and the meeting of IP territory by telephone meeting server (being ivr server in the present embodiment) and VCS.Introduce three flow processs below respectively.
The user triggers video conference reservation flow process through the PSTN terminal and comprises:
The operation of above-mentioned steps 1003～1004 is identical with the operation of step 603～604 among the embodiment one, just repeats no more here.
When preset conference, need the PSTN number at least one PSTN terminal of attending a meeting of input.
So far, video conference reservation flow process finishes.Ivr server is according to the conference parameters of preserving, and the time of meeting of appointment is triggered the video conference visioning procedure in conference parameters, creates PSTN territory meeting and the meeting of IP territory by ivr server and VCS respectively, specifically comprises:
One, ivr server is in the time of meeting of appointment; Create the meeting in PSTN territory according to conference parameters; PSTN number according to the PSTN terminal of attending a meeting that comprises in the conference parameters; Call out each PSTN terminal of attending a meeting, behind the called off-hook, promptly set up ivr server and be connected with the PSTN of the PSTN terminal room of this off-hook.
Step 607 is identical among the ivr server operation of specifically creating the meeting of PSTN territory here and the embodiment one, just repeats no more here.After creating the meeting in PSTN territory, promptly can carry out the transmission of video conference speech data.Identical among concrete mode and the embodiment one.
Two, VCS creates IP territory meeting according to the notice of ivr server, and the mode that concrete ivr server sends notice, VCS creates IP territory meeting according to notice can have two kinds, is respectively:
1, ivr server sends the notice of creating IP territory meeting to VCS after specifying the time of meeting to create PSTN territory meeting, in this notice, comprises conference parameters.After VCS receives and should notify; Create IP territory meeting according to conference parameters immediately; Also according to the PSTN number at the PSTN terminal of attending a meeting that comprises in the conference parameters, the subscriber box of inquiry and the IP sign representative of these PSTN number bindings, and set up IP respectively with these subscriber box and be connected.
2, ivr server is after the conference parameters that receives the input of caller PSTN terminal; Send conference parameters through IP network to VCS, VCS preserves, and in the specified the time of meeting of conference parameters; Create IP territory meeting according to conference parameters; Also according to the PSTN number at the PSTN terminal of attending a meeting that comprises in the conference parameters, the subscriber box of inquiry and the IP sign representative of these PSTN number bindings, and set up IP respectively with these subscriber box and be connected.
Step 610 is identical among above-mentioned two kinds of operations of creating IP territory meeting and the embodiment one, just repeats no more here.After creating IP territory meeting, promptly can carry out the transmission of video data in the video conference.Identical among concrete mode and the embodiment one.
So far, the video conference visioning procedure in the preset conference finishes.Certainly, the reservation video conference in the present embodiment can utilize artificial video conferencing system to realize, promptly PSTN terminal incoming call traffic seat is imported relevant preset conference parameter, by the traffic seat preset conference parameter is sent to ivr server and VCS.Other operations are all identical.
After video conference create to be accomplished, if when having the user to pass through the PSTN terminal to insert the video conference service in corresponding meeting-place, it is identical with flow process among the embodiment one that video conference adds flow process.And meeting is carried out in the process, the flow process that the PSTN hanging up terminal withdraws from meeting also with embodiment one in identical.
In video conference reservation flow process, visioning procedure and the adding flow process of above-mentioned present embodiment; Similar with embodiment one; The PSTN terminal of inserting video conference business can be the PSTN terminal of binding with the IP sign, also can be not identify the PSTN terminal of binding with IP, can be through the IP network transmitting-receiving video data of setting up for the former; PSTN through setting up connects the receiving and transmitting voice data, thereby enjoys the omnibearing information of whole video meeting; Connect the receiving and transmitting voice data for the latter through the PSTN that sets up, can not set up IP and connect, be equivalent to insert the impression of videoconference, but this mode has been enriched the class of business that the PSTN terminal is inserted.
The above-mentioned embodiment that is first kind of video conference implementation method provided by the invention.In this mode, the video conference of specifying the meeting-place can created or insert in the PSTN terminal at any time arbitrarily.In this method, owing to need to specify the meeting-place, so the precondition of its enforcement is that enterprise or user have registered certain or some meeting-place in system, meets traditional videoconference use habit, paid by the user in registration meeting-place.
Except that aforesaid way, the present invention also provides second kind of video conference implementation method.When using this method holding video conference, do not need the registered in advance meeting-place, can directly dial preset special service number, import the called PSTN terminal-joined meeting that at least one is attended a meeting.System can be that an idle meeting-place is selected at caller PSTN terminal according to the resource behaviour in service, should the free time meeting-place with called PSTN terminal incoming call, and holding video conference.In this video conference process, pay by caller PSTN terminal.Embodiment through three pairs of second kind of video conference implementation methods of the present invention of embodiment is described in detail below.
Embodiment three:
The video conference implementation method of present embodiment also can be implemented in automatic video frequency conference system shown in Figure 5, and the concrete grammar flow process is shown in figure 11, comprising:
The operation of above-mentioned steps 1101～1102 is identical with the operation of step 601～602 among the embodiment one, just repeats no more here.
In the present embodiment, the PSTN special service number of supposing second kind of video conference implementation method is 118166.Caller PSTN terminal can be the PSTN terminal of binding with the IP sign, also can be the PSTN terminal that does not have binding, does not influence enforcement of the present invention.
Ivr server can be imported called PSTN number through voice suggestion caller PSTN terminal A, and points out each PSTN number to finish the number input with " # " key.The ivr server operation that collects the digits after detecting " # " key, confirms to have imported a complete PSTN number.
In this step, the operation of setting up PSTN connection, transmitting audio data is identical with the operation in the previous embodiment one, just repeats no more here.
After this step is complete, can return execution in step 1105～1107, continue other called PSTN terminals of input, it is added the PSTN territory meeting in meeting-place.
In above-mentioned calling procedure, the time of caller PSTN terminal input PSTN number, preferably carry out overtime restriction.Particularly, when the user imports called number, can time-out time be set for the first place, again for interdigit is provided with overtime, for example be provided with the first 10 seconds overtime, interdigit 5 seconds is overtime; When first called PSTN number of system prompt caller PSTN terminal input, do not Enter Number in 10 seconds like caller PSTN terminal, system points out the user to import once more, and 3 promptings input yet then finish conversation; Import other when called the user, the user did not Enter Number in 10 seconds, and system points out the user to import once more, then the user was switched go back to the meeting-place like input not yet.When the user Enters Number, but do not press # number end, ivr server 5 seconds interdigit time out time then, then adopt paid-in number to breathe out.
In the calling procedure of above-mentioned steps, telephone meeting server is when calling out called PSTN terminal, and states such as the user at PSTN terminal is busy, no response, spacing are transferred to caller PSTN terminal.During busy or spacing, telephone meeting server finishes this time to call out when the overtime no response in called PSTN terminal or called PSTN terminal.For Personal Handyphone System or mobile phone called party user, like the order of not writing in reply of the local side switch at called PSTN terminal, but play the user busy, temporarily can't connect the untill further notice sound, system handles according to no response.In ivr server, dispose no response duration (adjustable parameter in advance; Tentative 30 seconds); In the no response duration, do not receive ANM (or ACM) signaling of called end office; System stops call called, with the switchback video conference of caller PSTN terminal, promptly pass through with ivr server between PSTN be connected the speech data in the transmission of video meeting.
So far, the transmission that the lang sound data of going forward side by side has been set up in the meeting in PSTN territory in the video conference.Set up the foundation that process is carried out following IP territory meeting synchronously with the meeting in above-mentioned PSTN territory, specifically carry out in step 1104 back:
The concrete IP of establishment territory meeting in this step, search the IP sign, set up IP and connect identically with the operation in the previous embodiment one, just repeat no more here with the operation that adds IP territory meeting.
Step 1111; VCS receives the PSTN number at other called PSTN terminals; And, search the IP sign with called PSTN terminal binding according to preset binding relationship, set up IP with the subscriber box of this IP sign representative and be connected; It is added the IP territory meeting that step 1109 is created, utilize each IP that sets up to connect the video data in the transmission of video meeting.
In this step, identical in the operation of the video data in the transmission of video meeting and the previous embodiment one just repeated no more here.
So far, accomplished the establishment of PSTN territory and the meeting of IP territory, and set up the voice and video passage respectively, the voice and video data in can the transmission of video meeting.
In the process that video conference is carried out, caller PSTN terminal can add new called PSTN terminal through preset button request in the meeting-place.Concrete mode can for: by * number, system isolates caller PSTN terminal when the calling subscriber wants to call out other user in communication process, and prompting caller PSTN terminal " requests called number, press the end of # key ".Caller PSTN imports at the terminal PSTN number at called PSTN terminal, after pressing the # key, and telephone meeting server execution in step 1106～1107; If find input error in the input process, caller PSTN terminal can be returned by * number, in the video conference of system with calling subscriber's switchback meeting-place.
Further, for the restriction parliamentary dimension, preferably, in above-mentioned video conference implementation method, correspondent is limited, concrete restriction can have following three aspects:
The restriction of one, maximum being conversed number formulary.
Particularly; Maximum conversation number formulary can be set in telephone meeting server; When the PSTN number at called PSTN terminal was imported at caller PSTN terminal, telephone meeting server was judged the PSTN terminal number in the current meeting-place, if reached preset maximum conversation number formulary; Then prompting (calling subscriber) number formulary has reached maximum conversation number formulary, and forces caller PSTN terminal to return the video conference in meeting-place.
The restriction of two, minimum being conversed number formulary.
Usually, video conference is the MPTY more than two sides.Therefore, when having only two side users in the meeting-place, ivr server can whenever utilize the background sound mode to point out caller PSTN terminal to invite other PSTN joining meeting to terminal at a distance from the preset time interval.The concrete time interval of reminding can be identical at every turn, also can be different.For example, system M minute for the first time at interval, (valve system of M, N can be joined, and least unit be minute, generally M＜=N) to utilize the background sound mode to point out the user to invite other users by the * key later at interval in N minute.When number of users was reduced to two sides by the three parts, the prompting user invited new user in the every interval N of system minute.
Three, caller PSTN terminal is imported first the restriction of PSTN termination number.
After called PSTN terminal is imported at caller PSTN terminal first; The PSTN number at the second called PSTN terminal if in preset second time interval (for example P minute), do not breathe out; Then cut off this conversation, and notice VCS breaks off the IP connection of having set up in the corresponding meeting-place.
In communication process, preferably the various button operations to caller PSTN terminal respond.For example the # key is directly pressed at caller PSTN terminal, and ivr server can be reported the business function brief introduction; By other keys, can point out by * or by the # key.
Withdrawing from perhaps for called active in the MPTY state, accident goes offline; Can adopt with embodiment one in identical processing mode; Further, ivr server can adopt other PSTN terminals in the form notification of meetings of background sound to have the PSTN terminal to withdraw from meeting.When the called PSTN hanging up terminal of in the meeting last, to other called PSTN termination numbers of caller PSTN terminal notifying input, for example playing alert tones " is dialed next phone by the * key " once more.
In the above-described embodiment, if caller PSTN terminal is the extension subscriber with implicit expression number, the PSTN number that this PSNT terminal is set in ivr server allows to create a plurality of meeting-place.
As above, be the embodiment that the present invention provides two kinds of video conference implementation methods and corresponding video conferencing system.
More than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (41)
1. the implementation method of a video conference; It is characterized in that; In the video conferencing system that comprises videoconference server VCS, IP network, PSTN network, PSTN switching equipment, telephone meeting server and PSTN terminal; Be the subscriber box that is used for the process IP agreement and carries out coding and decoding video that each user's setting links to each other with IP network, said telephone meeting server links to each other with the PSTN network, and this method comprises:
Be each subscriber box in the said video conferencing system and VCS difference distributing IP sign, and with the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal;
The PSTN terminal of binding IP sign is initiated PSTN as caller and is called out; Request adds the video conference of specifying the meeting-place; The PSTN switching equipment is set up PSTN and is connected between caller PSTN terminal and telephone meeting server; Telephone meeting server obtains the appointment meeting field information that caller PSTN terminal request adds, and this caller PSTN terminal is added said appointment meeting-place, utilizes said PSTN to connect the speech data of transmission of video meeting;
VCS obtains the call information that comprises caller PSTN number and appointment meeting field information; According to the preset subscriber box IP sign and the binding relationship of PSTN number; Confirm and the caller IP sign of caller PSTN number binding, set up IP through call control server with the subscriber box of said caller IP sign representative and be connected, and according to said appointment meeting field information; This subscriber box is added said appointment meeting-place, utilize the video data of said IP network transmission of video meeting.
2. method according to claim 1 is characterized in that said telephone meeting server further links to each other with IP network,
The PSTN terminal of said binding IP sign is initiated PSTN as caller and is called out; Request adds the video conference of specifying the meeting-place; The PSTN switching equipment is set up PSTN and is connected and comprises between caller PSTN terminal and telephone meeting server: said caller PSTN calls at the terminal PSTN number of Conference server; Said PSTN switching equipment be caller PSTN terminal with telephone meeting server between set up PSTN and be connected, said caller PSTN terminal connects to send to telephone meeting server through said PSTN and adds the request of specifying the meeting-place video conference;
The appointment meeting-place information that said telephone meeting server obtains the adding of caller PSTN terminal request comprises: telephone meeting server connects the said appointment meeting field information of reception through said PSTN;
Said VCS obtains the call information that comprises caller PSTN number and appointment meeting field information and comprises: said telephone meeting server will comprise that the PSTN number at said caller PSTN terminal and the call information of said appointment meeting field information send to said VCS through IP network.
3. method according to claim 1 is characterized in that, in said video conferencing system, further comprises the traffic seat that at least one links to each other with IP network with the PSTN network respectively,
The PSTN terminal of said binding IP sign is initiated PSTN as caller and is called out; Request adds the video conference of specifying the meeting-place; The PSTN switching equipment is set up PSTN and is connected and comprises between caller PSTN terminal and telephone meeting server: the manual service number that caller PSTN terminal call is preset; The PSTN switching equipment should be called out and insert arbitrary traffic seat; Said arbitrary traffic seat mutual through with said caller PSTN terminal receives the video conference in the appointment meeting-place that said caller PSTN terminal request adds, and sets up PSTN for caller PSTN terminal with said telephone meeting server and be connected;
The appointment meeting-place information that said telephone meeting server obtains the adding of caller PSTN terminal request comprises: said arbitrary traffic seat sends to telephone meeting server with the appointment meeting field information of caller PSTN terminal input;
Said VCS obtains the call information that comprises caller PSTN number and appointment meeting field information and comprises: said traffic seat will comprise that the call information of caller PSTN number and said appointment meeting field information sends to said VCS through IP network.
4. method according to claim 1; It is characterized in that; If said video conference is immediate meeting, then when caller PSTN terminal be first PSTN terminal in said appointment meeting-place, after setting up PSTN and connecting; This method further comprises: telephone meeting server is created the PSTN territory meeting of specifying the meeting-place according to the conference parameters of caller PSTN terminal input; And with in the said conference parameters adding call information; VCS further obtains the conference parameters of caller PSTN terminal input when obtaining call information, create the IP territory meeting of specifying the meeting-place.
5. method according to claim 1 is characterized in that, if said video conference is preset conference, then before the request of caller PSTN terminal call telephone meeting server added the video conference of specifying the meeting-place, this method further comprised:
PSTN call request predetermined conference is initiated as caller in arbitrary PSTN terminal; The PSTN switching equipment is set up PSTN for this PSTN terminal with telephone meeting server and is connected, and receives the conference parameters that comprises the time of meeting and specify the meeting-place of said arbitrary PSTN terminal input through this PSTN connection;
Said telephone meeting server is created the PSTN territory meeting of specifying the meeting-place in the said the time of meeting, and said VCS obtains conference parameters, and creates the IP territory meeting of specifying the meeting-place in the said the time of meeting.
6. method according to claim 5 is characterized in that said VCS obtains conference parameters, and specifies the IP territory meeting in meeting-place to do in said the time of meeting establishment,
The said conference parameters that telephone meeting server will receive in advance sends to VCS through IP network; VCS carries out the said operation of specifying meeting-place IP territory meeting of creating in the time of meeting according to the conference parameters that receives;
Perhaps,
Telephone meeting server is created the IP territory meeting of specifying the meeting-place at said the time of meeting notice VCS.
7. according to claim 4 or 5 described methods; It is characterized in that; When comprising the attending a meeting during the PSTN terminal of appointment in the said conference parameters; After said telephone meeting server was created the PSTN territory meeting of specifying the meeting-place, this method further comprises: telephone meeting server was set up PSTN with each specified PSTN terminal of attending a meeting of conference parameters and is connected;
After said VCS creates the IP territory meeting of specifying the meeting-place; This method further comprises: VCS is according to preset binding relationship; The IP sign of the PSTN number binding at each PSTN terminal of attending a meeting that the inquiry conference parameters is specified; And set up IP through call control server with the subscriber box of each IP sign representative and is connected, it is added the appointment meeting-place.
8. method according to claim 1 is characterized in that,
The speech data that the said PSTN of utilization is connected in the transmission of video meeting comprises: utilize telephone meeting server to be connected with each PSTN that attends a meeting the PSTN terminal room in said appointment meeting-place and obtain the speech data that gather at each PSTN terminal, be transferred to the PSTN terminal of attending a meeting accordingly behind the audio mixing;
Utilize the video data in the meeting of said IP network transmission of video to comprise: VCS is to the video data in each subscriber box transmission meeting-place of attending a meeting in said appointment meeting-place; Said each attended a meeting subscriber box collection and the local video Data Transmission of encoding to VCS, shows after receiving the video data decoding of VCS transmission.
9. method according to claim 8; It is characterized in that; Saidly comprise: according to the video way N of VCS with arbitrary this subscriber box processing of negotiation when setting up IP between subscriber box and being connected of attending a meeting to each video data of attending a meeting subscriber box transmission meeting-place of specifying the meeting-place; VCS is at other N the subscriber box of selection between subscriber box of attending a meeting except that this subscriber box; And will through and N subscriber box between the N road video Data Transmission of N the subscriber box collection receiving of each IP network and coding to said arbitrary subscriber box of attending a meeting, said N is a positive integer.
10. method according to claim 9 is characterized in that, a said N subscriber box comprises the subscriber box as the chairman at least.
11. method according to claim 9 is characterized in that, said will through and N subscriber box between N the subscriber box collection receiving of each IP network and the N road video Data Transmission of coding comprise to said arbitrary subscriber box of attending a meeting:
VCS receives said N road video data, and the payload part of video data adds distinguishing identifier on every road, with add after the distinguishing identifier N road video data through and said arbitrary IP network of attending a meeting between subscriber box be transferred to this subscriber box of attending a meeting.
12. method according to claim 8; It is characterized in that; Show behind the video data decoding of said each subscriber box reception VCS transmission of attending a meeting and comprise: said arbitrary subscriber box of attending a meeting; The N road video data that receives the VCS transmission is decoded respectively, and decoded video data is merged into a screen size shows.
13. method according to claim 1; It is characterized in that; This method further comprises: VCS preserves the IP sign of each subscriber box of attending a meeting, and when VCS was connected unexpected the disconnection with the IP of the subscriber box of attending a meeting arbitrarily after, VCS initiatively made a call to this subscriber box of attending a meeting through call control server; Rebulid IP and connect, it is added specify the meeting-place.
14. method according to claim 13 is characterized in that, said telephone meeting server further links to each other with IP network,
When arbitrary PSTN of attending a meeting terminal walks out; This method further comprises: after telephone meeting server detects the on-hook signal at arbitrary PSTN of attending a meeting terminal; Break off PSTN with this PSTN terminal and be connected, and notify the information of withdrawing from the arena at this PSTN terminal of VCS through IP network; VCS is according to the corresponding relation of attend a meeting subscriber box and the PSTN number preserved in advance; And the information of withdrawing from the arena at arbitrary PSTN terminal of telephone meeting server transmission; Confirm the corresponding subscriber box of PSTN number at said arbitrary PSTN terminal; To the call control server initiation request, remove IP with the subscriber box that finds and be connected.
15. method according to claim 1 is characterized in that, the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal are set on the addressing server in IP network.
16. method according to claim 15; It is characterized in that; The binding relationship that said basis is preset; Confirm to comprise with the caller IP sign of the PSTN number binding at caller PSTN terminal: VCS sends to the addressing server in the IP network with caller PSTN number, and the addressing server is confirmed the caller IP sign with said caller PSTN number binding according to the binding relationship of preserving.
17. method according to claim 1 is characterized in that, said IP is designated SIP URI.
18. method according to claim 1; It is characterized in that said VCS sets up IP through the subscriber box of call control server and the representative of said caller IP sign and is connected and comprises: the IP that on call control server, preserves each subscriber box in advance identifies and the corresponding relation of IP address;
Call control server is according to the IP sign of obtaining from VCS, and the corresponding relation of the IP that self preserves sign and IP address, confirms the IP address of said IP sign representative subscriber box, and sets up IP for this subscriber box with VCS and be connected.
19. method according to claim 18 is characterized in that, saidly preserves the IP sign of subscriber box and the corresponding relation of IP address comprises at call control server in advance:
Subscriber box powers on the back to said call control server transmission register requirement, in this request, carries IP sign and the IP network self preserved and is self IP address allocated, and call control server is preserved the IP sign of reception and the corresponding relation between the IP address.
20. a video conferencing system is characterized in that, this system comprise videoconference server VCS, call control server, IP network, PSTN network, PSTN switching equipment, telephone meeting server, PSTN terminal and with the subscriber box of PSTN terminal binding;
Said PSTN terminal is used for add specifying through the PSTN call request video conference in meeting-place, and sets up PSTN between said telephone meeting server and is connected, and send speech data to said telephone meeting server, receives the speech data in the also displaying video meeting;
Said PSTN switching equipment is used to said PSTN terminal and sets up PSTN with said telephone meeting server and be connected;
Said telephone meeting server is used for the described request according to the transmission of said PSTN terminal, and said PSTN terminal is added said appointment meeting-place, utilizes the speech data that is connected the transmission of video meeting with the PSTN of said PSTN terminal room;
Said VCS; Be used to obtain the PSTN number and the appointment meeting field information at said PSTN terminal; And according to being the binding relationship that IP identifies and the PSTN number is set up that each subscriber box distributes in the network in advance; Confirm the subscriber box with said PSTN terminal binding, and set up IP through said call control server with said subscriber box and be connected, according to the appointment meeting field information of said telephone meeting server transmission; Said subscriber box is added said appointment meeting-place, utilize the video data of said IP network transmission of video meeting;
The subscriber box of said and said PSTN terminal binding is used to gather the local video transfer of data and gives said VCS, and receives, decodes and show the video data of the video conference that said VCS sends.
21. the implementation method of a video conference; It is characterized in that; In the video conferencing system that comprises videoconference server VCS, IP network, PSTN network, PSTN switching equipment, telephone meeting server and PSTN terminal; Be the subscriber box that is used for the process IP agreement and carries out coding and decoding video that each user's setting links to each other with IP network, said telephone meeting server links to each other with IP network with the PSTN network, and this method comprises:
Be each subscriber box in the said video conferencing system and VCS difference distributing IP sign, and with the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal;
The PSTN terminal of binding IP sign is initiated PSTN as caller and is called out; The request holding video conference; The PSTN switching equipment is set up PSTN and is connected between caller PSTN terminal and telephone meeting server; With the idle meeting-place that caller PSTN terminal adding system reserves, create the PSTN territory meeting in said meeting-place; Caller PSTN imports at the terminal PSTN number at least one called PSTN terminal successively; Trigger telephone meeting server and call out said called PSTN terminal; The PSTN switching equipment is that telephone meeting server is set up PSTN with the called PSTN terminal of replying and is connected; The called PSTN terminal that telephone meeting server will be replied adds said meeting-place, utilizes each PSTN to connect the speech data of this meeting-place video conference of transmission;
Telephone meeting server sends to VCS through IP network with caller PSTN terminal and the PSTN number at said called PSTN terminal of replying and the information in said meeting-place;
VCS is according to the information in said meeting-place; Create the IP territory meeting in said meeting-place; And according to the preset subscriber box IP sign and the binding relationship of PSTN number, confirm and the IP sign of each PSTN number binding that receives, set up IP through call control server with the subscriber box of said each IP sign representative and be connected; Said subscriber box is added said meeting-place, utilize the video data of said this meeting-place video conference of IP network transmission.
22. method according to claim 21 is characterized in that, carries out in the process in video conference, this method further comprises:
Caller PSTN terminal adds new called PSTN terminal through preset button request in said meeting-place, and imports the PSTN number at new called PSTN terminal;
Telephone meeting server is called out said new called PSTN terminal according to the PSTN number of user's input, sets up PSTN for telephone meeting server with the new called PSTN terminal of replying and is connected, and the new called PSTN terminal of replying is added said meeting-place; And the PSTN number at the new called PSTN terminal that will reply sends to VCS;
VCS is according to the preset subscriber box IP sign and the binding relationship of PSTN number; Confirm IP sign with the PSTN number binding at said new called PSTN terminal of replying; Setting up IP through call control server with the subscriber box of the IP sign representative of confirming is connected; This subscriber box is added said meeting-place, utilize the IP that sets up to connect the video data in this meeting-place of transmission.
23. according to claim 21 or 22 described methods; It is characterized in that; When said caller PSTN imports the PSTN number at called PSTN terminal in the terminal; Telephone meeting server isolates the PSTN territory meeting in said meeting-place with said caller PSTN terminal, and after the calling that finishes called PSTN terminal, with the PSTN territory meeting in the said meeting-place of switchback, caller PSTN terminal.
24. method according to claim 23; It is characterized in that, when said caller PSTN imports the PSTN number at called PSTN terminal in the terminal, if the current PSTN number of terminals that has added said meeting-place reaches preset maximum; Then system prompt caller PSTN terminal has exceeded parliamentary dimension; No longer receive the PSTN number of caller PSTN terminal input, no longer call out called PSTN terminal, and the PSTN territory meeting in said meeting-place is switched back at caller PSTN terminal.
25. method according to claim 23 is characterized in that, said telephone meeting server comprises the PSTN territory meeting that caller PSTN terminal isolates said meeting-place:
Said telephone meeting server stops to utilize said telephone meeting server to be connected the speech data that transmits the meeting-place with the PSTN of caller PSTN terminal room, utilizes this PSTN to connect the call status information at the called PSTN of transmission terminal;
Said PSTN territory meeting with the said meeting-place of switchback, caller PSTN terminal comprises: stop to utilize the PSTN of telephone meeting server and caller PSTN terminal room to be connected the call status information that transmits called PSTN terminal, continue to utilize this PSTN to connect the speech data in transmission meeting-place.
26. according to claim 21 or 22 described methods, it is characterized in that, when calling out called PSTN terminal, during the busy or spacing in overtime no response in called PSTN terminal or called PSTN terminal, then finish said calling.
27. according to claim 21 or 22 described methods; It is characterized in that; When only having two PSTN terminals in the said meeting-place; Every at a distance from preset very first time interval, telephone meeting server is connected the PSTN number at other PSTN terminals of attending a meeting of input, prompting caller PSTN terminal through the PSTN with caller PSTN terminal room.
28. method according to claim 21; It is characterized in that; Import the PSTN number at a called PSTN terminal when said caller PSTN terminal after, after the second preset time interval, caller PSTN does not import at the terminal PSTN number at next called PSTN terminal as yet; Then telephone meeting server breaks off and to be connected with the PSTN at all PSTN terminals in the said meeting-place, and notifies that the IP between all subscriber box is connected in VCS disconnection and the said meeting-place.
29. method according to claim 21 is characterized in that, in telephone meeting server, is provided with, and for the caller PSTN terminal that comprises extension set, allows this caller PSTN terminal to create the PSTN territory meeting in a plurality of said meeting-place simultaneously.
30. method according to claim 21 is characterized in that,
The said speech data that utilizes each PSTN to connect this meeting-place video conference of transmission comprises: utilize said each PSTN to connect and obtain the speech data that gather at each PSTN terminal, be transferred to corresponding PSTN terminal behind the audio mixing;
The said video data of this meeting-place video conference of IP network transmission that utilizes comprises: VCS is to the video data in each subscriber box transmission meeting-place in said meeting-place; Said each subscriber box collection and the local video Data Transmission of encoding show behind the video data decoding of reception VCS transmission to VCS.
31. method according to claim 30; It is characterized in that; Video data to each subscriber box transmission meeting-place in said meeting-place comprises: the video way N of this subscriber box processing of negotiation when setting up IP between VCS and arbitrary subscriber box and is connected; VCS selects N subscriber box between other subscriber box except that this subscriber box; And will through and N subscriber box between the N road video Data Transmission of N the subscriber box collection receiving of each IP network and coding to said arbitrary subscriber box, said N is a positive integer.
32. method according to claim 31 is characterized in that, a said N subscriber box comprises the subscriber box as the chairman at least.
33. method according to claim 31 is characterized in that, said will through and N subscriber box between N the subscriber box collection receiving of each IP network and the N road video Data Transmission of coding comprise to said arbitrary subscriber box of attending a meeting:
VCS receives said N road video data, and the payload part of video data adds distinguishing identifier on every road, with add after the distinguishing identifier N road video data through and said arbitrary IP network of attending a meeting between subscriber box be transferred to this subscriber box of attending a meeting.
34. method according to claim 32; It is characterized in that; Show behind the video data decoding of said each subscriber box reception VCS transmission and comprise: said arbitrary subscriber box; The N road video data that receives the VCS transmission is decoded respectively, and decoded video data is merged into a screen size shows.
35. method according to claim 21; It is characterized in that; This method further comprises: VCS preserves the IP sign of each subscriber box in the said meeting-place, and after the IP of VCS and any subscriber box was connected the accident disconnection, VCS initiatively made a call to this subscriber box through call control server; Rebulid IP and connect, it is added said meeting-place.
36. method according to claim 35; It is characterized in that; When said meeting-place is withdrawed from arbitrary PSTN terminal; This method further comprises: after telephone meeting server detects the on-hook signal at arbitrary PSTN terminal, break off PSTN with this PSTN terminal and be connected, and notify the information of withdrawing from the arena at this PSTN terminal of VCS through IP network; VCS is according to the corresponding relation of attend a meeting subscriber box and the PSTN number preserved in advance; And the information of withdrawing from the arena at arbitrary PSTN terminal of telephone meeting server transmission; Confirm the corresponding subscriber box of PSTN number at said arbitrary PSTN terminal; To the call control server initiation request, remove IP with the subscriber box that finds and be connected.
37. method according to claim 21 is characterized in that, the IP sign of each subscriber box and the PSTN number binding at least one PSTN terminal are set on the addressing server in IP network.
38. according to the described method of claim 37; It is characterized in that; The binding relationship that said basis is preset; Confirm to comprise with the caller IP sign of the PSTN number binding at caller PSTN terminal: VCS sends to the addressing server in the IP network with caller PSTN number, and the addressing server is confirmed the caller IP sign with said caller PSTN number binding according to the binding relationship of preserving.
39. method according to claim 21; It is characterized in that said VCS sets up IP through the subscriber box of call control server and the representative of said caller IP sign and is connected and comprises: the IP that on call control server, preserves each subscriber box in advance identifies and the corresponding relation of IP address;
Call control server is according to the IP sign of obtaining from VCS, and the corresponding relation of the IP that self preserves sign and IP address, confirms the IP address of said IP sign representative subscriber box, and sets up IP for this subscriber box with VCS and be connected.
40. according to the described method of claim 39, it is characterized in that, saidly preserve the IP sign of subscriber box and the corresponding relation of IP address comprises at call control server in advance:
Subscriber box powers on the back to said call control server transmission register requirement, in this request, carries IP sign and the IP network self preserved and is self IP address allocated, and call control server is preserved the IP sign of reception and the corresponding relation between the IP address.
41. video conferencing system; It is characterized in that, this system comprise VCS, call control server, IP network, PSTN network, PSTN switching equipment, telephone meeting server, caller PSTN terminal, at least one called PSTN terminal, respectively with the subscriber box of caller and called PSTN terminal binding;
Said caller PSTN terminal; Be used for through PSTN call request holding video conference; With set up PSTN between said telephone meeting server and be connected; And import the PSTN number at all called PSTN terminals successively, send speech data to said telephone meeting server, receive and the displaying video meeting in speech data;
Said PSTN switching equipment is used to said caller PSTN terminal and all called PSTN terminals and sets up PSTN and be connected respectively with between the said telephone meeting server;
Said telephone meeting server is used for said caller PSTN terminal and the idle meeting-place that all called PSTN terminal adding systems reserve are utilized the speech data that is connected the transmission of video meeting with the PSTN of each PSTN terminal room; And the PSTN number at said caller PSTN terminal and all called PSTN terminals and the information in said meeting-place sent to said VCS through said IP network;
Said VCS; Be used to receive the caller PSTN terminal of said telephone meeting server transmission and the PSTN number at all called PSTN terminals; And according to being the binding relationship that IP identifies and the PSTN number is set up that each subscriber box distributes in the network in advance; Confirm each subscriber box with each PSTN terminal binding, and set up IP through said call control server with said each subscriber box and be connected, according to the meeting field information of said telephone meeting server transmission; Said each subscriber box is added said meeting-place, utilize the video data of said IP network transmission of video meeting;
The subscriber box of said and caller PSTN terminal binding and with each subscriber box of each called PSTN terminal binding, be used to gather the local video transfer of data and give said VCS, and receive, decode and show the video data of the video conference that said VCS sends.
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| CN2007101799187A CN101465919B (en) | 2007-12-19 | 2007-12-19 | Method and system for implementing video conference |
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| CN2007101799187A CN101465919B (en) | 2007-12-19 | 2007-12-19 | Method and system for implementing video conference |
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| CN102594917A (en) * | 2012-03-10 | 2012-07-18 | 顾为民 | Point-to-point communication on internet |
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