CN1555197A - Video frequency meeting shared white plate realizing method based on Internet - Google Patents
Video frequency meeting shared white plate realizing method based on Internet Download PDFInfo
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- CN1555197A CN1555197A CNA2003101176135A CN200310117613A CN1555197A CN 1555197 A CN1555197 A CN 1555197A CN A2003101176135 A CNA2003101176135 A CN A2003101176135A CN 200310117613 A CN200310117613 A CN 200310117613A CN 1555197 A CN1555197 A CN 1555197A
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Abstract
A realization method for TV conference shared white panel based on Internet includes: a. A client sends a connection request to a server which generates SK answering the said required client and joins it in the tail of a chained list, b. The client draws on its plate and carries out vector sequential process to the drawings to be sent to Internet via its SK port, C. After receiving the said upbound data, the server reproduces the drawing on its plate by counter-sequential process and reviews the said chained list to transfer the data to all the shared clients via related SK ports. d. The shared client receives the said data and reproduces the drawings on the plate by counter-sequential process.
Description
Technical field
The present invention relates to the video conferencing system technology, specifically is a kind of realization method for TV conference shared white panel based on Internet.
Background technology
Face-to-face talk is the mankind's the abundantest a kind of modes that express thoughts, and people can give full play to eyes, expression and action and play up language.For business, the be beyond expression thing of the convincing and appeal of chart, file, data form and so on of telephone talk.When enterprise or group need hold a meeting, often run into the situation (even being distributed in all over the world) that its each department or personnel can't concentrate.To this, people have proposed to utilize communication medium to open the demand of video conference.So-called video conference utilizes communication line that two or more meeting rooms are coupled together exactly, a kind of Image Communication means of holding a meeting with TV mode.The principal character of video conference is to transmit the image etc. of participant's image, sound and meeting material chart and correlate in real time, and the participant who holds the different location can see shadow on hearing the news, as being sitting in meeting in same the meeting room.
Present video conferencing system mostly adopts the analog form images, since occupied bandwidth, apparatus expensive (needing a lot of proprietary hardware devices), upgrading inconvenience, running cost is very high, is difficult to popularize.
The progress of digital video and Audiotechnica has caused the revolution of computer and network, and has opened up new design space for the application of computer system.The progress of express network technology, distributed proccessing, multimedia messages treatment technology, multimedia workstation technology etc. is that the development of distributed multimedia system is laid a good foundation.The investigation result about video conferencing system that American I n-Stat/MDR announces shows that till 2006, the world market of video conferencing system will be 2,200,000,000 dollars scale from 700,000,000 7,200 ten thousand dollars of growths of calendar year 2001.
The research of digital video meeting at present mainly concentrates on LAN and ATM net.Bandwidth is a bigger problem in video conference application.LAN can provide enough bandwidth usually, thereby does not have bandwidth problem, and Internet is just different.LAN of enterprise of today and ATM net can provide enough bandwidth, and possess relevant QoS controlling mechanism, and concerning based on the video conference application of Internet, these factors are unpredictable often.For LAN video conference whiteboard system, figure can the bitmap mode be preserved and is transmitted, but on Internet, the different periods of the traffic in one day alter a great deal, and therefore need to introduce certain communication compression mechanism, to reduce the bandwidth demand of video conference.
Summary of the invention
In order to overcome the above shortcomings of prior art, the invention provides a kind of realization method for TV conference shared white panel, to satisfy the market demand of digital video conference system based on Internet.
The present invention is based on the realization method for TV conference shared white panel of Internet, may further comprise the steps:
A, startup are installed on the whiteboard system in server and the client computer, drawing board, drawing instrument hurdle and control panel appear on the display screen of server and client computer, the described server of client logon, and send connection request to server, server is accepted the connection request of client computer, produce the socket of this requesting clients of response simultaneously, and socket is added the afterbody of socket chained list;
B, client computer are drawn one or several figure on its drawing board, institute's drawing shape is carried out the vector sequence processing, file, and send on the Internet by its socket port at last;
C, described server by its socket port snooping, receive the figure sequence data that client computer uploads after, at first file, and the recorder order, handle graphic rendition on its drawing board by unserializing then;
Simultaneously described server traversal (promptly taking turns continuous query successively) socket chained list is transmitted to the client computer that all participate in a conference with the figure sequence data by corresponding socket port;
After the client computer of d, all logins receives the figure sequence data, handle graphic rendition on drawing board separately by unserializing, thus the purpose of realization Sharing Whiteboard.
In step b, client computer is as follows with the method that the figure of drawing on its drawing board carries out the vector sequence processing:
1., client computer is corresponding to each drawing instrument of whiteboard system, creates an array;
2., will adopt the draw characteristic value of shape element of each drawing instrument to add in the array of correspondence;
3., the array element of each array is pressed the specified order serializing, formation figure sequence data.
In step c, the step that server carries out the unserializing processing with the figure sequence data is as follows:
1., server is corresponding to each drawing instrument of whiteboard system, creates an array;
2., from the figure sequence data of receiving, find out current drawing instrument name information, thereby determine the drawing instrument that uses;
3., according to determined drawing instrument, and create graphic element according to the characteristic value of graph of a correspondence element in the figure sequence data, simultaneously this graphic element is added in the corresponding array of server whiteboard system.
In steps d, the step that client computer is carried out the unserializing processing to the figure sequence data that receive is as follows:
1., client computer is corresponding to each drawing instrument of whiteboard system, creates an array;
2., from the figure sequence data of receiving, find out current drawing instrument name information, thereby determine the drawing instrument that uses;
3., according to determined drawing instrument, and create graphic element according to the characteristic value of graph of a correspondence element in the figure sequence data, simultaneously this graphic element is added in the corresponding array of client computer whiteboard system.
The present invention make the blank figure of digital video conference system can be on Internet the high speed reliable transmission, thereby realize digital video conference system, overcome conventional video conference system occupied bandwidth, apparatus expensive, upgrading inconvenience, shortcoming that running cost is high based on Internet.
Have multiple drawing instrument and being used to the control panel of the style and the color of paintbrush, paintbrush, background is set, by TrackBar slide bar bar fine setting color, paintbrush not only can be provided with live width, and can be set to multiple dotted line.Solid or hollow two kinds of paintbrush not only can be set, the shade paintbrush can also be set, and have 6 kinds of shadow pattern available, can select background mode, greatly enrich the expressive ability of blank.
The order of native system recording drawing can realize back removing and recovery operation, when mistake is drawn and experiment when drawing, can revise easily.
Description of drawings
Fig. 1 is the system construction drawing of the present invention's one typical case study on implementation;
Fig. 2 is the transfer process figure of its blank figure;
Fig. 3 is the schematic diagram on its drawing instrument hurdle;
Fig. 4 is the schematic diagram of its control panel.
Embodiment
Further specify below in conjunction with accompanying drawing.
Fig. 1 is the system construction drawing of the present invention's one typical case study on implementation, the implementation case is made of jointly a station server and some client computer, system adopts star-like Client/Server structure and TCP host-host protocol, communicates by socket between server and the client computer.The concrete configuration of the implementation case is as follows:
The server configuration:
CPU：Intel?P4?1.4GHz
Internal memory: 256M
Operating system: Windows 2000 Server
Client configuration:
CPU：Intel?PIII?800MHz
Internal memory: 256M
Operating system: Windows 2000 Professional
Explanation the present invention is based on the TV conference shared white panel implementation procedure of Internet with reference to Fig. 1, Fig. 2:
1, at first starts server, make it to be in listening state.Start after the client computer, logon server sends connection request to server.Server is accepted the connection request of client computer, creates a new socket (socket+port) simultaneously, and the connection of special corresponding client socket has been set up a pair of socket that can intercom mutually with regard between like this.
Because between server and the client computer is the star-like syndeton of one-to-many, it is corresponding one by one with a plurality of client computer that server produces a plurality of sockets, and server is provided with a socket chained list and manages these sockets.When a client computer was sent connection request, server was accepted its request, produced a new socket, simultaneously this socket was added the afterbody of socket chained list.
2, client computer can be drawn one or several figure on its drawing board, and institute's drawing shape is carried out the vector sequence processing, files, and sends to server by its socket port by Internet at last;
3, described server by its socket port snooping, receive the figure sequence data that client computer uploads after, at first file, and the recorder order, handle graphic rendition on its drawing board by unserializing then; And traversal record the socket chained list of annexation, and the figure sequence data are transmitted to the client computer that all participate in a conference one by one by corresponding socket port.
4, after all client computer that participate in a conference receive the figure sequence data of server forwards, handle graphic rendition on drawing board separately, so just realized sharing of draw graphic elements by unserializing.
The present invention drawing board occurs behind client terminal start-up, show the toolbar (see figure 3) of 12 kinds of drawing instruments on the next door of drawing board, and the control panel (see figure 4) that paintbrush, paintbrush, background style are set.12 kinds of drawing instruments of toolbar are in order successively: straight line, rectangle, round rectangle, polygon, ellipse, circle, paintbrush geometric locus, inner ellipse, circular arc, elliptic arc, Bei Saier curve and literal input, other three buttons are: select and the mobile graphics element, cancel selection to drawing instrument, close the drawing instrument frame.
If server starts earlier, to monitor, client can be sent to server program and connect application.Click the connection icon of Main Toolbar.If server is not activated, client connects unsuccessful, and prompting is waited for once more connecting.Select "Yes", attempt once more connecting; Select "No", cancellation connects application.If be connected with server, disconnect this and connect, select the disconnecting icon of Main Toolbar to click, finish opening operation.
After client is selected a certain drawing instrument, the respective graphical of just can in drawing board, drawing.The figure of drawing on its drawing board is carried out the vector sequence processing.1., corresponding to 12 kinds of drawing instruments of whiteboard system the vector sequence processing procedure is:, create 12 arrays; 2., each drawing instrument the is drawn characteristic value of shape element is added in the corresponding array; 3., the array element of each array is pressed the specified order serializing.
The figure of drawing is preserved by serializing (Serialize), and serializing is preserved data feature values according to the attribute order, (being equivalent to a kind of compress mode) thus the data file by the Serialize preservation, and it is very little to take disk space, reads and writes very fast.For example the drawing board file of this program generally is no more than 100K, if save as the .bmp formatted file, needs the space of nM.Graph data after the serializing passes on the network by the socket port and mails to server.
The present invention has realized the serializing of document class at server end, and it is made up of the serializing of 12 kinds of graphic elements nearly.In whole blank, the quantity of every kind of graphic element may be from 0 to a plurality of arbitrarily.Corresponding every kind of graphic element has used an array to manage.Totally 12 arrays have 0 to any a plurality of elements in each array.
Server by its socket port snooping, receive the figure sequence data that client computer uploads after, at first file, and the recorder order, handle graphic rendition on its drawing board by unserializing then.The step that server carries out the unserializing processing with the figure sequence data is as follows:
1., server is corresponding to each drawing instrument of whiteboard system, creates an array, totally 12 arrays;
2., from the figure sequence data of receiving, find out current drawing instrument name information, thereby determine the drawing instrument that the client of upload request is used;
3., according to determined drawing instrument, and create corresponding graphic element according to the characteristic value of graph of a correspondence element in the figure sequence data, simultaneously this graphic element is added in the corresponding array of server whiteboard system.
Server is transmitted to this graphic element other shared client when receiving client's drawing.Preserve a socket chained list in the server, writing down with all of client and be connected.Server travels through this socket chained list, and the pel element is transmitted to other client, transmits and finishes by the socket port.
The present invention has realized the system tray function at server end.After the normal startup of white board server, will in system tray, show a small icon.Realize the system tray function, divided for 5 steps carried out:
1) sets up a window object of handling the pallet notification message
2) set up a structure
3) set up corresponding pallet notification message mapping mechanism
4) invoke script method
5) in window object, write event response method.
1., corresponding to each drawing instrument of whiteboard system also transmit the above-mentioned figure sequence data of coming in the client of sharing, the figure sequence data that receive are carried out following unserializing handle,, create an array by socket port reception server; 2., from the figure sequence data of receiving, find out current drawing instrument name information, thereby determine the drawing instrument that uses; 3., according to determined drawing instrument, and create graphic element according to the characteristic value of graph of a correspondence element in the figure sequence data, simultaneously this graphic element is added in the corresponding array of the client computer whiteboard system of sharing.
Adopt the method for searching loop that one of the element in each figure array is not shown with not leaking then.
Button in the drawing instrument hurdle from left to right is followed successively by as shown in Figure 3: straight line, rectangle, round rectangle, polygon, ellipse, circle, paintbrush geometric locus, inner ellipse, circular arc, elliptic arc, Bei Saier curve and 12 kinds of drawing instruments of literal input, other three buttons are: select and the mobile graphics element, cancel selection to drawing instrument, close the drawing instrument frame.The specific implementation principle of described 12 kinds of drawing instruments is as follows:
Straight line: on drawing board, get 2 points, draw straight line at point-to-point transmission.
Rectangle: on drawing board, get 2 points, with 2 be diagonal, draw a rectangle.
Round rectangle: on drawing board, get 2 points, with 2 be diagonal, draw a round rectangle.
Polygon: utilize the each point of being got in the chained list recording drawing process, these points are polygonal summits.Between consecutive points, draw straight line, just finished polygonal drafting.
Oval: as on drawing board, to get 3 points, determine the ellipse long and short shaft radius.This method can be drawing inclined ellipse, more flexible than interior cutting method.Get 2 points earlier, determine the radius and the angle of transverse axis, get again thirdly, determine the radius of the oval longitudinal axis.Oval center is preceding 2 mid point.
Circular: as on drawing board, to get two points, call the method for painting inner ellipse, be offset the distance that equates to upper left and bottom right from central point.This is apart from the distance of the point-to-point transmission that equals to be got, i.e. radius of a circle.
The paintbrush geometric locus: system is provided with the chained list of the point of a recording track curve, when paintbrush is mobile on drawing board, constantly sends the data of tracing point, and the data of tracing point are constantly added in the chained list, draws straight line at adjacent point-to-point transmission simultaneously, and track is shown.System in package a method of drawing straight line, draw straight line at adjacent point-to-point transmission.Because the straight line of point-to-point transmission is very tiny, can not have influence on the outward appearance of curve.
Inner ellipse: circular principle is identical with drawing, be circumscribed be not square but rectangle.
Circular arc: get three points on drawing board, three points constitute a triangle, ask its circumscribed circle, show again first and thirdly between the circular arc of circumscribed circle on counterclockwise.The mid point vertical line on Atria bar limit must meet at a bit, and this point is called " unfaithful intention ", in fact is exactly the center of circle of circumscribed circle.Can obtain the slope of two limit mid point vertical lines, and then obtain the focus of two limit mid point vertical lines, this intersection point is exactly the center of circle of circumscribed circle.
Elliptic arc: drawing elliptic arc in two steps, at first is to draw ellipse, gets elliptic arc wherein then.The orientation of elliptic arc is a clockwise direction.
The Bei Saier curve: the Bei Saier spline curve is by two terminal points and two definite smooth curves of intermediate point that play " tractive " effect, be to help the engineer to set up Mathematical Modeling to body of a motor car at first, such spline curve is all used in the design from the font to the bullet nowadays.Draw the Bei Saier spline curve, use two parameters, one is the Point array pointer, and another nCount represents the number of array point.NCount must be that one 3 multiple adds 1 integer (3n+1), as 4,7,11...... need 4 points because draw a Bei Saier curve, if draw continuous two, then last terminal point will need the array of 7 points like this as back one starting point.
The literal input: when selecting the text input tool, videotex frame, display text input tool hurdle simultaneously.
Control panel as shown in Figure 4 comprises the color setting and the style setting of paintbrush, paintbrush, background.Wherein, carry out paintbrush, paintbrush or background color when being provided with, can select nearly 16,777,216 kinds of colors by slide bar, and the method to set up simple, intuitive.Get look by the slide bar bar, show the color of preparing at window, this function is also used in other systems.
In style is provided with, the live width of paintbrush can be set, paintbrush can also be made as solid line or various dotted line, the style of paintbrush can be made as hollow, solid or the shade paintbrush, and has 6 kinds of shadow pattern available.
Whiteboard system of the present invention can be checked the IP address of this machine and other performance parameter, and as memory size, hard drive space size etc., this sends correct connection request during for network service, and the transplanting of system is helpful.If a user is implanted in native system on the strange machine use, he can know the IP address and the machine performance parameter of this machine very soon so, as memory size, hard drive space size.
This blank system log (SYSLOG) has the order of drawing, can return to remove and recover, and when mistake is drawn and experiment when drawing, can revise easily, and this also is the function that other blank not have appearance.
Claims (10)
1, a kind of realization method for TV conference shared white panel based on Internet is characterized in that may further comprise the steps:
A, startup are installed on the whiteboard system in server and the client computer, drawing board, drawing instrument hurdle and control panel appear on the display screen of server and client computer, the described server of client logon, and send connection request to server, server is accepted the connection request of client computer, produce the socket of this requesting clients of response simultaneously, and socket is added the afterbody of socket chained list;
B, client computer are drawn one or several figure on its drawing board, institute's drawing shape is carried out vector sequence processing, file, send on the Internet by its socket port at last;
C, described server by its socket port snooping, receive the figure sequence data that client computer uploads after, at first file, and the recorder order, handle graphic rendition on the drawing board of server by unserializing then;
Simultaneously, described server traversal socket chained list is transmitted to the client computer that all participate in a conference with described figure sequence data by corresponding socket port;
After the client computer of d, all logins receives the figure sequence data, handle graphic rendition on drawing board separately by unserializing.
2, the realization method for TV conference shared white panel based on Internet according to claim 1 is characterized in that, in step b, client computer is as follows with the method that the figure of drawing on its drawing board carries out the vector sequence processing:
1., client computer is corresponding to each drawing instrument of whiteboard system, creates an array;
2., each drawing instrument the is drawn characteristic value of shape element is added in the corresponding array;
3., the array element of each array is pressed the specified order serializing.
3, the realization method for TV conference shared white panel based on Internet according to claim 1 is characterized in that: in step c, the step that server carries out the unserializing processing with the figure sequence data is as follows:
1., server is corresponding to each drawing instrument of whiteboard system, creates an array;
2., from the figure sequence data of receiving, find out current drawing instrument name information, thereby determine the drawing instrument that uses;
3., according to determined drawing instrument, and create graphic element according to the characteristic value of graph of a correspondence element in the figure sequence data, simultaneously this graphic element is added in the corresponding array of server whiteboard system.
4, the realization method for TV conference shared white panel based on Internet according to claim 1 is characterized in that: in steps d, the step that the client computer of login is carried out the unserializing processing to the figure sequence data that receive is as follows:
1., client computer is corresponding to each drawing instrument of whiteboard system, creates an array;
2., from the figure sequence data of receiving, find out current drawing instrument name information, thereby determine the drawing instrument that uses;
3., according to determined drawing instrument, and create graphic element according to the characteristic value of graph of a correspondence element in the figure sequence data, simultaneously this graphic element is added in the corresponding array of client computer whiteboard system.
5, the realization method for TV conference shared white panel based on Internet according to claim 1 is characterized in that: the whiteboard system of client computer records the order of drawing, can return and remove and recovery operation.
6, the method for the TV conference shared white panel based on Internet according to claim 1, it is characterized in that: client computer is drawn oval-shaped step and is on its drawing board, get 2 points on drawing board earlier, determines the radius and the angle of transverse axis, get again thirdly, determine the radius of the oval longitudinal axis.
7, the method for the TV conference shared white panel based on Internet according to claim 1, it is characterized in that: the step of client computer draw brush geometric locus on its drawing board is, the chained list of the point of a recording track curve is set, when paintbrush is mobile on drawing board, constantly send the data of tracing point, the data of tracing point are constantly added in the chained list, draw straight line at adjacent point-to-point transmission simultaneously, track is shown.
8, the method for the TV conference shared white panel based on Internet according to claim 1, it is characterized in that: described drawing instrument hurdle comprises straight line, rectangle, round rectangle, polygon, ellipse, circle, paintbrush geometric locus, inner ellipse, circular arc, elliptic arc, Bei Saier curve and literal input tool.
9, the realization method for TV conference shared white panel based on Internet according to claim 1 is characterized in that: described control panel comprises the color setting and the style setting of paintbrush, paintbrush, background.
10, the realization method for TV conference shared white panel based on Internet according to claim 9 is characterized in that: the color of described background is provided with and adopts the slide bar bar to get look.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310117613 CN1235404C (en) | 2003-12-24 | 2003-12-24 | Video frequency meeting shared white plate realizing method based on Internet |
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|---|---|---|---|
| CN 200310117613 CN1235404C (en) | 2003-12-24 | 2003-12-24 | Video frequency meeting shared white plate realizing method based on Internet |
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| CN1555197A true CN1555197A (en) | 2004-12-15 |
| CN1235404C CN1235404C (en) | 2006-01-04 |
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| CN 200310117613 Expired - Fee Related CN1235404C (en) | 2003-12-24 | 2003-12-24 | Video frequency meeting shared white plate realizing method based on Internet |
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| US11422951B2 (en) | 2011-09-14 | 2022-08-23 | Barco N.V. | Electronic tool and methods for meetings between two users |
| CN104106037A (en) * | 2012-02-13 | 2014-10-15 | 日立麦克赛尔株式会社 | Projector, graphical input/display device, portable terminal and program |
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| CN103176794A (en) * | 2013-01-31 | 2013-06-26 | 北京恒华伟业科技股份有限公司 | Organization and analysis method of Android screen contact trajectory data |
| US10175928B2 (en) | 2014-12-10 | 2019-01-08 | Ricoh Company, Ltd. | Image management system, communication terminal, communication system, image management method and recording medium |
| EP3032827A1 (en) * | 2014-12-10 | 2016-06-15 | Ricoh Company, Ltd. | Image management system, communication terminal, communication system, image management method and recording medium |
| CN105812813B (en) * | 2016-03-21 | 2019-07-12 | 深圳宸睿科技有限公司 | One kind is given lessons video compress, playback method and compression, playing device |
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| CN106128194A (en) * | 2016-07-11 | 2016-11-16 | 西京学院 | The method and device that the information of a kind of teaching system sends |
| CN107426084A (en) * | 2017-06-07 | 2017-12-01 | 邹时月 | A kind of approaches to IM of chat software |
| CN107426084B (en) * | 2017-06-07 | 2020-05-22 | 上海生集信息服务有限公司 | Information management method of chat software |
| CN107528701A (en) * | 2017-09-01 | 2017-12-29 | 北京恒华伟业科技股份有限公司 | A kind of transmission method of information, device and server |
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| CN113709546A (en) * | 2021-06-30 | 2021-11-26 | 海信视像科技股份有限公司 | Display apparatus and color pickup method |
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