CN106851176A - Video meeting implementing method based on wechat - Google Patents
Video meeting implementing method based on wechat Download PDFInfo
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- CN106851176A CN106851176A CN201710177186.1A CN201710177186A CN106851176A CN 106851176 A CN106851176 A CN 106851176A CN 201710177186 A CN201710177186 A CN 201710177186A CN 106851176 A CN106851176 A CN 106851176A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/04—Real-time or near real-time messaging, e.g. instant messaging [IM]
- H04L51/046—Interoperability with other network applications or services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/07—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail characterised by the inclusion of specific contents
- H04L51/10—Multimedia information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/52—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail for supporting social networking services
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Computing Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses the video meeting implementing method based on wechat, including system interaction interface module, video/audio signal management module, image mapping block and User Status management module, for existing video conference high cost, meeting-place be limited, the troublesome shortcoming of server disposition, on the basis of member's connection of attending a meeting is set up from wechat, video/audio signal is obtained, further management is attended a meeting member and selectively integral image voice signal, and finally sets up the instant video conferencing environment that facilitate easy-to-use, low cost, can use whenever and wherever possible.
Description
Technical field
The invention belongs to communication technique field, it is related to video conference, more particularly to the video-meeting method based on wechat.
Background technology
Video conferencing system refers to the multiple participants on diverse geographic location, by signal transmission line, signal
Collecting device and multimedia equipment, video image and sound are transmitted mutually immediately, and reach the effect of meeting that talks face to face is
System.
Video conference weakens limitation geographically compared with traditional meeting, and participant is in the place of network stabilization
Carry out.Compared with videoconference, video conferencing system not only transmitting voice information, simultaneous transmission image information, participant can
More intuitively to obtain conference content, there is sensation on the spot in person.
According to the difference of video conference implementation, existing video conferencing system can substantially be divided into two classes：By meeting
The TV conference system and the Video Conference System by internet of TV and television line.TV conference system needs
Special meeting room, while being equipped with corresponding video camera, televimonitor, loudspeaker, liquid crystal display or projecting apparatus, causes meeting
With high costs and meeting-place is discussed to be limited to.Existing Video Conference System is, it is necessary to build special server to carry
For user terminal connection, the service such as video, audio signal integration and forwarding.Because existing network video conferencing system must build
And safeguard server, the expense of server admin and Add User in the server is not existing network video conferencing system
Major drawbacks.
Wechat is current most popular mobile terminal MSN.Under prior art conditions, during many people's videos, every
Participant possesses the authority freely made a speech.If many people's videos are directly used in video conference, conference flow can be caused chaotic, meeting
Process is slow.
The content of the invention
For above-mentioned problem, the present invention provides a kind of convenience and high-efficiency and the video conference of economy is organized and real
Existing method.
Present invention reduces the cost of video conference, meeting-place limitation is weakened, there is provided a kind of instant video conference
Method, while controlling network traffics.
To reach above-mentioned purpose, present invention employs following technical proposal, it is characterised in that this method includes：
Step one, the hardware for being equipped with wechat video conferencing system
Each attend a meeting member be equipped with mobile terminal one, mobile terminal equipped with version Android4.0.3 and on behaviour
Make system, the mobile terminal of the micro-signal of the member that attends a meeting advance income meeting organizer；
Step 2, wechat video conference attend a meeting member interconnection
Wechat video conference is actively initiated by a certain wechat user as meeting organizer, referred to as requesting party；Here, arbitrarily
Wechat is used per family can be used as requesting party；N wechat user of meeting is participated in as by organizer, referred to as reciever；Attend a meeting member
And the number of members n+1 (n that attend a meeting>=1) defined by requesting party, reciever can receive or refuse the invitation of requesting party；Described ginseng
Meeting member is the set for including requesting party and reciever member；
Step 3, management wechat video conference
During video conference, with the time, only one member that attends a meeting makes a speech, and referred to as the member that attends a meeting is in x shapes
State, i.e. active state；Other members that attend a meeting listen to speech in y states, that is, listen to state；Application waits the member that attends a meeting of speech
In q states, i.e. application status；The member that attends a meeting for temporarily exiting meeting is in z states, i.e. resting state；
Whenever each member that attends a meeting is in above-mentioned four kinds of states；Each attend a meeting member whenever
Changed in these four states；
Step 4, split screen display available video image
Step 5, video/audio signal management
Removing is attended a meeting member, and the user not to other wechats user and in z states sends video/audio signal；
The spokesman of x state is removed, the microphone of other member mobile terminals of attending a meeting is not turned on, signal is not obtained；
Step 6, mapping attend a meeting member video's image to it is respective correspondingly vision area
One width raw video image is rectangle, and the width of raw video image is p, and the length of raw video image is q, then
Raw video image is designated as p × q；The raw video image attempts intactly to be mapped in mapping vision area b × d；
Step 7, meeting adjourned and disconnects
Wechat video conference meet following condition first meeting adjourned, video connection disconnect.
Condition 1：Requesting party actively terminates meeting；
Condition 2：Number of members of attending a meeting in y states is 0.
The above-mentioned video meeting implementing method based on wechat, each member condition conversion of attending a meeting in step 3, specifically
Rule is：
Conversion between four kinds of states follows following several rules and carries out；
Rule 1：When meeting starts, requesting party enters state x, and reciever enters state y；
Rule 2：After the member's speech of attending a meeting in state x terminates, the member that attends a meeting is transformed into state y, is designated as x->y；
Rule 3：After the member that attends a meeting in state y proposes speech application to requesting party, the state of the member that attends a meeting is then
State q is transformed into, y- is designated as>q；Member attend a meeting after state q is transformed into, waits in line into speech application queue Q；
Rule 4：After the member that attends a meeting of z in a dormant state proposes speech application to requesting party, the member that attends a meeting enters ginseng
Can wait in line in application queue Z, once requesting party grants an application, then the State Transferring of the member that attends a meeting is designated as z- to state y
>y；
Rule 5：When the member's Requested Party of attending a meeting in request floor state q agrees to speech, the then shape of the member that attends a meeting
State is transformed into state x, is designated as q->x；
Rule 6：When the member that attends a meeting in the state y that attends a meeting proposes to exit meeting to requesting party, after requesting party agrees to, the ginseng
The State Transferring of meeting member is designated as y- to state z>z；
Rule 7：The member that attends a meeting in x state can only have one in synchronization in system；
According to above-mentioned regular 1-7, it can be deduced that following inference：
Inference 1：When the member set that attends a meeting in state q is for empty or in state z member set is space-time, meeting is just
Often carry out；
Inference 2：In the overall process of meeting, meeting presider can not be in state z；
Two queues in above-mentioned rule, wait speech queue Q and sleep queue Z；Two queues use prerequisite variable
Algorithm, i.e., the member that attends a meeting of advanced enqueue is served before.
In above-mentioned steps four, video image split screen display available is realized as follows；
Main screen vision area is the vision area all over the screen of mobile terminal used；
If mobile terminal display screen width all over the screen is B, length is L；Then each attached screen vision area region is defined as width：B/4,
Length：1.2*B/4；
Attached screen Transparence Display is on main screen；
According to the different of the number of members n+1 that in the step 2 of the claims 1 and step 3, attends a meeting and attend a meeting residing for member
The difference of state, using two kinds of different display screen area partitioning algorithms, scheme one and scheme two；
Scheme one：n<When=4, the video image of the member that attends a meeting in x state is displayed in main screen vision area, in y states
The video image of the member that attends a meeting shown in the attached screen vision area of display screen corner respectively；
Scheme two：n>When 4, the video image of the member that attends a meeting in x state is displayed in main screen vision area, in y states
Attend a meeting member video image on the right side of display screen attached screen vision area list display；Display is slided in attached screen vision area list.
In above-mentioned steps five, video/audio signal management is realized according to following algorithm；
Attend a meeting member video image use following multiple video strems refresh scheme：
Video flowing section is in multiwindow using refresh scheme in turn；It was divided into 30 timeslices by one second, each timeslice is accounted for
When 1/30 second, each timeslice refresh a video flowing；
For the spokesman's video image for ensuring x state is smooth, it is ensured that its video flowing refresh rate is 15fps；The present invention takes
The attached screen of main screen alternately refreshes, the algorithm that each attached screen refreshes successively；I.e. refresh sequence is：
Main screen->Attached screen 1->Main screen->Attached screen 2->……->Main screen->Attached screen n.
In above-mentioned steps six, image mapping algorithm is specifically expressed as follows；
In systems, raw video image is intactly mapped in the mobile terminal screen vision area specified using following algorithm
Interior display；
Raw video image p × q is placed on the origin of the 1st quadrant of coordinate system XOY, then can be by raw video image upper left
With the region that the point coordinates of bottom right two (0,0) and (p, q) uniquely determines the raw video image；
Mapping vision area b × d is placed on in raw video image the same coordinate system first quartile, then mapping vision area can use and reflect
The point coordinates of vision area two (x1, y1) (x2, y2) is penetrated to uniquely determine；
Raw video image is made up of one group of pixel, is designated as W={ w (x, y) }, and x, y represent this pixel respectively
The transverse and longitudinal coordinate of point；Mapping graph picture after raw video image mapping is by another group of pixel W '={ w ' (x ', y ') } compositions, x '
And y ' represents x, the transverse and longitudinal coordinate after y mappings；If the vision area horizontal width of raw video image is VxThe individual unit of display, display is single
Position is usually pixel, and vertical height is VyThe individual unit of display；Then：
To any pixel pointAbscissa x, uses mapping α：
X '=VxRx/(p√(1+((y2-y1)/(x2-x1))2))+a
Wherein R is surplus coefficient, and a is horizontal displacement；
Mapping β is used to its ordinate y：
Y '=VyRy/q+b
Wherein R is surplus coefficient, and b is vertical displacement amount；
The raw video image of current speaker is shown in main screen vision area using above-mentioned mapping algorithm, listener is each
From raw video image be shown to respectively in its corresponding attached screen vision area；I.e.：
Spokesman's video image --->Main screen vision area
The raw video image of participant 1 --->Attached screen vision area 1
The raw video image of participant 2 --->Attached screen vision area 2
……
Participant's n raw video images --->Attached screen vision area n.
In above-mentioned steps four, video image split screen display available, each vision area relation is expressed as：
N+1 width video images are shown within same time, main screen vision area, i.e., will be attended a meeting on the image of main screen spokesman
The video image of person is overlapped and is displayed in attached screen vision area 1 ... ..., in n；Relation between these overlay chart pictures uses XOR
The relation of (⊕)；⊕ represents that two image overlapping transparents show；I.e.：
The attached screen vision area n images of the attached image ⊕ ... ⊕ of screen vision area 2 of the attached image ⊕ of screen vision area 1 of main screen vision area image ⊕；
Image between main screen vision area and all attached screen vision areas is transparent visible.
The present invention has beneficial effect.
The present invention calls existing wechat routine interface, and the connection of the member that attends a meeting is set up by wechat video communication, improves
The convenience and ease for use of video conference.
Video/audio signal of the invention is forwarded by existing wechat server, without building special server, is reduced
The cost of video conference.
The present invention is needed to video/audio signal integration, selectively after video/audio signal stream is obtained according to meeting
Sent to user, reduce the expense of Internet resources.
Brief description of the drawings
Fig. 1：System module schematic diagram of the invention
Fig. 2：The schematic diagram of video image scheme for screen-splitting display one of the invention
Fig. 3：The schematic diagram of video image scheme for screen-splitting display two of the invention
Fig. 4：Member condition transition diagram of attending a meeting of the invention
Fig. 5：Image of the invention maps schematic diagram
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
The present invention has taken into full account existing video conferencing technology, for its somewhat expensive, disposes cumbersome shortcoming and micro-
The imperfection of telecommunication function.On the basis of wechat, video/audio signal during people's video many by integration management builds video council
View environment.
Video conferencing system based on wechat of the present invention mainly include system interaction interface, image mapping block,
Several components such as video/audio signal management, User Status management, system architecture is clear, realizes simple.As shown in figure 1, following
Will be described in detail the specific implementation process of system of the present invention.
(1) realization at system interaction interface
System interaction interface is responsible for the module that user interacts with this video conferencing system.User is by the selection in interface
Control completes the control to other modules of system background.Meanwhile, the image and voice signal in system are also by system interaction circle
Face is shown to user.
System interaction interface of the invention is divided into scheme one and scheme two, and according to the difference of number of participants n+1, system is automatic
Selection interface scheme.n<Displaying scheme one when=4, n>Displaying scheme two when 4.
If A is requesting party, B, C, D are reciever.Number of participants is 3+1, system interaction interface operational version one.Such as Fig. 2
Shown, A is displayed in main screen vision area, and B, C, D are respectively displayed on upper left, upper right, lower-left Fu Ping regions.
If A is requesting party, B, C, D, E, F, G, H, I, J are reciever.Number of participants is 9+1, and system interaction interface uses
Scheme two.As shown in figure 3, A is displayed in main screen vision area, B, C, D, E, F, G, H, I, J are displayed in the attached screen vision area list in right side, attached
Screen vision area list can slide display.
It is that, with generality, below with A as requesting party, B, C, D, E, F, G, H, I, J are the situation explanation system of reciever
System module.
(2) User Status management module
Attend a meeting member State Transferring flow direction it is as shown in Figure 4.
Requesting party A and reciever B, C, D, E, F, G, H, I, J are sent to User Status management module by system interaction interface.
User Status management module sets up member's data structure for each member that attends a meeting.Member data structure content includes：Attend a meeting into
Member's title, attend a meeting member ip addresses, member condition of attending a meeting, requesting party or reciever show the position of vision area.
According to above-mentioned User Status transformation rule, the member A that attends a meeting enters x state, and attend a meeting member B, C, D, E, F, G, H, I, J
Into y states.
If attending a meeting member's B, C, D request floor, B, C, D enter speech application queue Q.At the end of A makes a speech, the state of A
Y is changed into from x, the speech application of B is submitted at A, B leaves speech application queue Q.
A vetos the speech application of B, and the state of B is changed into y from q.The speech application of C is submitted at A, and C leaves speech application team
Row Q.
A agrees to the speech application of C, and the state of C is changed into x from q.
If E, F, G obtain leaving meeting after A agrees to, the state of E, F, G is changed into z from y.
If meeting is participated in E, F application again, E, F enter the application queue Z that attends a meeting.
The application of attending a meeting of E is submitted at A, and E leaves application queue of attending a meeting, and A vetos the application of attending a meeting of E, E hold modes z.
The application of attending a meeting of F is submitted at A, and F leaves application queue of attending a meeting, and A agrees to the application of attending a meeting of F, and the state of F is become by z
It is y.
(3) video/audio signal management module
Read User Status management module in each member that attends a meeting member data structure, judge this attend a meeting member whether
In x state, the microphone of the member that attends a meeting is opened if in x state.
Read User Status management module in each member that attends a meeting member data structure, judge this attend a meeting member whether
In z states, video/audio signal is not sent to the member if in z states.
Multiple video strems refresh scheme is alternately refreshed using the attached screen of main screen, the algorithm that each attached screen refreshes successively.
Multiple video strems refresh scheme can be expressed as follows：
1) initialize:
Define attached screen vision area and refresh mark i equal to 0；
2) main screen vision area refreshes:
1st, main screen vision area refresh step is performed；
2nd, execution 3 is redirected) attached screen vision area refreshing；
3) attached screen vision area refreshes:
1st, i-th piece of attached screen vision area refresh step is performed；
2nd, the value of i adds 1；
If the 3, the value of i is set to 0 equal to the value of the number n, i of reciever；
4th, execution 2 is redirected) refreshing of main screen vision area；
Wherein n is reciever number.
(4) image mapping block
Image mapping block reads video/audio signal and the User Status management that video/audio signal management module sends
The User Status of the active conference participant of module, image mapping algorithm maps are passed through by every video image of meeting participant
To its correspondence position.The image and sound that image mapping block will map are sent to system interaction interface.
As shown in Figure 5：
If A is in x state, the raw video image of A is put into first quartile by raw video image a length of p, a width of q of A
In, the upper left corner is origin, then the raw video image of A can use (0,0), and 2 points of (p, q) is uniquely determined.If A original video figures
The vision area horizontal width of picture is VxThe individual unit of display, the unit of display is usually pixel, and vertical height is VyThe individual unit of display.
If vision area a length of b, a width of d that A is mapped to, mapping vision area can use (x1, y1), and (x2, y2) determines.
The mapping method of A is as follows：
Can be represented with (x, y) for each pixel in A raw video images.(x ', y ') it is after (x, y) maps
Coordinate, x ', y ' obtained by following computing.
X '=VxRx/(p√(1+((y2-y1)/(x2-x1))2))+a
Y '=VyRy/q+b
Wherein R is surplus coefficient, and a is horizontal displacement, and b is vertical displacement amount.
Although the present invention is disclosed above with preferred embodiments, so it is not limited to the present invention.Technology belonging to of the invention
Have usually intellectual in field, without departing from the spirit and scope of the present invention, when can do various changes with retouching.Cause
This, protection scope of the present invention ought be defined depending on those as defined in claim.
Claims (6)
1. the video meeting implementing method of wechat is based on, it is characterised in that comprised the following steps：
Step one, the hardware for being equipped with wechat video conferencing system
Each attend a meeting member be equipped with mobile terminal one, mobile terminal equipped with version Android4.0.3 and on operation system
System, the mobile terminal of the advance income meeting organizer of micro-signal requirement of the member that attends a meeting；
Step 2, wechat video conference attend a meeting member interconnection
Wechat video conference is actively initiated by a certain wechat user as meeting organizer, referred to as requesting party；Any wechat user
Can be used as requesting party；N wechat user of meeting is participated in as by organizer, referred to as reciever；Attend a meeting and member and attend a meeting into
Member number n+1 is defined by requesting party, and reciever can receive or refuse the invitation of requesting party；The described member that attends a meeting is to include request
Side and the set of reciever member；n>=1；
Step 3, management wechat video conference
During video conference, with the time, only one member that attends a meeting makes a speech, and referred to as the member that attends a meeting is in x state, i.e.,
Active state；Other members that attend a meeting listen to speech in y states, that is, listen to state；Application waits the member that attends a meeting of speech to be in q
State, i.e. application status；The member that attends a meeting for temporarily exiting meeting is in z states, i.e. resting state；
Whenever each member that attends a meeting is in one of above-mentioned four kinds of states；Whenever each member that attends a meeting can be
Changed between these four states；
Step 4, split screen display available video image；
Step 5, video/audio signal management
Except the member that attends a meeting, wechat video conferencing system is not to other wechats user and the user in z states sends image sound
Message number；
Except the spokesman of x state, the microphone of other member mobile terminals of attending a meeting is not turned on, does not obtain signal；
Step 6, mapping attend a meeting member video's image to it is respective correspondingly vision area
One width raw video image is rectangle, and the width of raw video image is p, and the length of raw video image is q, then original
Video image is designated as p × q；The raw video image attempts intactly to be mapped in mapping vision area b × d；
Step 7, meeting adjourned and disconnects
Wechat video conference meet following condition first meeting adjourned, video connection disconnect；
Condition 1：Requesting party actively terminates meeting；
Condition 2：Number of members of attending a meeting in y states is 0.
2. the video meeting implementing method based on wechat according to claim 1, it is characterised in that four kinds of states it
Between conversion follow following several rules and carry out：
Rule 1：When meeting starts, requesting party enters state x, and reciever enters state y；
Rule 2：After the member's speech of attending a meeting in state x terminates, the member that attends a meeting is transformed into state y, is designated as x->y；
Rule 3：After the member that attends a meeting in state y proposes speech application to requesting party, the state of the member that attends a meeting then is changed
To state q, y- is designated as>q；Member attend a meeting after state q is transformed into, waits in line into speech application queue Q；
Rule 4：After the member that attends a meeting of z in a dormant state proposes speech application to requesting party, the member that attends a meeting enters Shen of attending a meeting
Please wait in line in queue Z, once requesting party grants an application, then the State Transferring of the member that attends a meeting is designated as z- to state y>y；
Rule 5：When the member's Requested Party of attending a meeting in request floor state q agrees to speech, then the state of the member that attends a meeting turns
State x is changed to, q- is designated as>x；
Rule 6：When the member that attends a meeting in the state y that attends a meeting proposes to exit meeting to requesting party, after requesting party agrees to, this is attended a meeting into
The State Transferring of member is designated as y- to state z>z；
Rule 7：The member that attends a meeting in x state can only have one in synchronization in system；
According to above-mentioned regular 1-7, following inference is drawn：
Inference 1：When the member set that attends a meeting in state q is for empty or in state z member set is space-time, meeting is normally entered
OK；
Inference 2：In the overall process of meeting, meeting presider can not be in state z；
Two queues in above-mentioned rule, wait speech queue Q and sleep queue Z；Two queues use prerequisite variable algorithm,
The member that attends a meeting of i.e. advanced enqueue is served before.
3. the video meeting implementing method based on wechat according to claim 1, it is characterised in that：The split screen display available is regarded
Frequency image is specific as follows：
Main screen vision area is the vision area all over the screen of mobile terminal used；
If mobile terminal display screen width all over the screen is B, length is L；Then each attached screen vision area region is defined as width：B/4, it is long
Degree：1.2*B/4；
Attached screen Transparence Display is on main screen；
According to different and member's status of attending a meeting the differences of the number of members n+1 that in the step 2 and step 3, attends a meeting, use
Two kinds of different display screen area partitioning algorithms, i.e. scheme one and scheme two；
Scheme one：n<When=4, the video image of the member that attends a meeting in x state is displayed in main screen vision area, the ginseng in y states
The video image of meeting member shows in the attached screen vision area of display screen corner respectively；
Scheme two：n>When 4, the video image of the member that attends a meeting in x state is displayed in main screen vision area, in attending a meeting for y states
The video image of member attached screen vision area list display on the right side of display screen；Display is slided in attached screen vision area list.
4. the video meeting implementing method based on wechat according to claim 1, it is characterised in that：The split screen display available is regarded
Frequency image is specially：
N+1 width video images are shown within same time, main screen vision area, i.e., will be attended a meeting on the image of main screen vision area spokesman
The video image of person is overlapped and is displayed in attached screen vision area 1 ... ..., in n regions；Relation between these overlay chart pictures uses different
Or the relation of (⊕)；⊕ represents that two image overlapping transparents show；I.e.：
The attached attached screen vision area n images of the vision area image ⊕ ... ⊕ of screen 2 of the attached image ⊕ of screen vision area 1 of main screen vision area image ⊕；
Image between main screen vision area and all attached screen vision areas is transparent visible.
5. the video meeting implementing method based on wechat according to claim 1, it is characterised in that：Described image sound is believed
Number management implementation process it is as follows：
Attend a meeting member video image use following multiple video strems refresh scheme；
Video flowing section is in multiwindow using refresh scheme in turn；It was divided into 30 timeslices by one second, 1/ when each timeslice is accounted for
30 seconds, each timeslice refreshed a video flowing；
For the spokesman's video image for ensuring x state is smooth, it is ensured that its video flowing refresh rate is 15fps；The present invention takes main screen
Attached screen alternately refreshes, the algorithm that each attached screen refreshes successively；I.e. refresh sequence is：
Main screen->Attached screen 1->Main screen->Attached screen 2->……->Main screen->Attached screen n.
6. the video meeting implementing method based on wechat according to claim 1, it is characterised in that the mapping is attended a meeting into
The detailed process of member's video image to respective correspondence vision area is as follows：
In systems, raw video image is intactly mapped in the mobile terminal screen vision area specified using following algorithm and is shown
Show；
Raw video image p × q is placed on the origin of the 1st quadrant of coordinate system XOY, then can be by raw video image upper left and the right side
Lower two point coordinates (0,0) and (p, q) uniquely determine the region of the raw video image；
Mapping vision area b × d is placed on in raw video image the same coordinate system first quartile, then mapping vision area can be regarded with mapping
The point coordinates of area two (x1, y1) (x2, y2) uniquely determines；
Raw video image is made up of one group of pixel, is designated as W={ w (x, y) }, and x, y represents this pixel respectively
Transverse and longitudinal coordinate；Mapping graph picture after raw video image mapping is by another group of pixel W '={ w ' (x ', y ') } compositions, x ' and y '
Represent x, the transverse and longitudinal coordinate after y mappings；If the vision area horizontal width of raw video image is VxThe individual unit of display, the unit of display is led to
Often it is pixel, vertical height is VyThe individual unit of display；Then：
To any pixel pointAbscissa x, uses mapping α：
X '=VxRx/(p√(1+((y2-y1)/(x2-x1))2))+a
Wherein R is surplus coefficient, and a is horizontal displacement；
Mapping β is used to its ordinate y：
Y '=VyRy/q+b
Wherein R is surplus coefficient, and b is vertical displacement amount；
The raw video image of current speaker is shown in main screen vision area using above-mentioned mapping algorithm, listener is respective
Raw video image is shown in its corresponding attached screen vision area respectively；I.e.：
Spokesman's video image --->Main screen vision area
The raw video image of participant 1 --->Attached screen vision area 1
The raw video image of participant 2 --->Attached screen vision area 2
……
Participant's n raw video images --->Attached screen vision area n.
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