JP2003259323A - Video conference system and method, and spreadsheet data sharing apparatus and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video conference system having a mechanism for quickly and easily reflecting updated spreadsheet data which are commonly and mutually shared, on the other terminal stations. <P>SOLUTION: A consultant station 10 and a client station 20 are respectively provided with spreadsheet data update sections 15, 25 and can correct the spreadsheet data TD included in a base station 20. When the spreadsheet data update sections 15, 25 makes a correction, a contents conversion section 322 converts the updated spreadsheet data TD into data having a prescribed format so that a Web server 321 can transmit the data. HTML data, image data and data of the PDF form are available for the data with the prescribed format. When the spreadsheet data TD are updated, a URL notice section 14 (or 24) informs other client stations or the like about a URL of Web contents after the conversion to change the access destination of respective Web browsers. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video conference system for bidirectional communication using video and audio.

[0002]

2. Description of the Related Art There is a so-called video conference system in which video and audio communication is performed at multiple points by using terminals such as video phone devices and PCs through media such as the Internet and telephone lines. Then, using this system, remote multipoint conferences, multipoint education, etc. are conducted.

There are various spreadsheet software programs that can be run on a PC or the like, and the data can be displayed on a Web page.

Spreadsheet software is software that manages a database in the form of a list and enables total calculation and graph display with simple operations. Data is managed in cell units and By defining the calculation formula by using the above formula, it is possible to automatically calculate and aggregate the numerical data input in each cell.

Using a multi-point video conference system,
For example, in the case of conducting management consulting, the management information is concrete table data (created with spreadsheet software)
As a result, it is effective to refer to each other and share information.

There are various forms of management consulting using a video conference system, such as one-to-one consultants and consultants or one-to-many consultants and consultants. In the case of 1, it is necessary for both parties to share the table data, and in the case of one-to-many, it is necessary for all participants to proceed with the dialog while sharing the same table data.

Conventionally, in such a remote multipoint video conference system, in order to share the table data, (1) the same printed matter (paper medium) is distributed in advance to each participant (2) mail etc. in advance (3) Convert table data into static HTML data, images, and document data (eg, GIF image, PDF, etc.),
It is used as a network shared file. (4) A method of taking a material with a photographing camera (or a document camera) set in a communication device and transmitting the image to other participants has been used.

[0008]

Among the above-mentioned conventional methods, in (1) and (2), since the update of the table data cannot be promptly reflected to other participants, real-time information exchange is an advantage. It cannot be said to be an effective means in a video conferencing system. Further, in the method of (4), it is possible to visually notify other participants of the correction content,
It is not an effective means because it does not reflect the modification of the data itself.

Further, the method (3) is applied to a system that simultaneously uses the Web browsing and the video conference, so that it is possible to refer to the table data while watching the video of the participants on one screen. But there is
After all, the update of table data by a participant is not a mechanism to be immediately transmitted to other participants.

As described above, the tabular data shared by each of the above methods is very static data and is not suitable for the purpose of obtaining the result while making various changes and corrections to the numerical values. Therefore, it has not been sufficiently effective in applications such as management information analysis that requires interactive processing, that is, in fields where interactive and immediate processing is required.

In order to solve the above problems, the present invention constructs a system for effectively and promptly utilizing table data that is sequentially updated between multipoint terminals.

[0012]

[Means for Solving the Problems] In order to solve the above problems, data of a spreadsheet software is shared between a plurality of terminals while bidirectional image and voice communication is performed by a videophone system such as an internet video conference system. , The data is displayed on each terminal in the form of Web contents.

At this time, the data modified in a certain terminal (which also manages the modification authority) is immediately converted into Web contents and simultaneously displayed on each terminal.

Further, when the correction data is converted into the Web contents, for example, the numerical data is converted into a bar graph and displayed to make the contents visually easy to understand.

That is, the invention according to claim 1 is a video conference system for transmitting and receiving video and audio between terminal stations connected via a network, wherein a) a plurality of terminal stations and b) each terminal station. And a base station connected via a network, wherein the base station b-1) relay means for relaying video and audio transmitted and received between the terminal stations, b-2) from each terminal station A means for managing spreadsheet data updated through a network, and b-3) in response to the spreadsheet data update processing, the spreadsheet data is automatically converted into a predetermined format that can be displayed by a Web browser. And a b-4) a Web server for distributing the spreadsheet data converted into the predetermined format, wherein each terminal station a-1) sequentially outputs the images relayed by the relaying means. While displaying, The delivered the spreadsheet data has means for compositely displaying, characterized in that it comprises a means for outputting a speech relayed by a-2) the relay means.

According to a second aspect of the invention, in the video conference system according to the first aspect, the predetermined format includes a data format described in HTML.

According to a third aspect of the invention, in the video conference system according to the first or second aspect, the predetermined format includes an image data format.

According to a fourth aspect of the present invention, in the video conference system according to any of the first to third aspects, the predetermined format includes a document file format.

According to a fifth aspect of the present invention, in the video conference system according to any one of the first to fourth aspects, the base station further includes b-5) the spreadsheet data in the predetermined format. A means for converting numerical information into graph image information at the time of conversion is provided.

According to a sixth aspect of the present invention, in the video conference system according to any one of the first to fifth aspects, each terminal station a-3) updates the content of the spreadsheet data via the network. A-4) means for notifying another terminal station of the URL of the Web content associated with the spreadsheet data converted into a predetermined format, and updating the display content of the Web browser of the other terminal station. , Are provided.

According to a seventh aspect of the present invention, in the video conference system according to any one of the first to sixth aspects, the management terminal station which is one of the plurality of terminal stations has authority to update the spreadsheet data. Is managed, and only the terminal station to which the update authority is given can update the spreadsheet data.

The invention according to claim 8 is a videoconference method for transmitting and receiving video and audio between terminal stations connected via a network, wherein: a) a base station updates processing from each terminal station via the network. The step of accumulating the spreadsheet data, b) the step of updating the spreadsheet data while transmitting and receiving video and audio to and from the other terminal station at one terminal station; ) A means for automatically converting the spreadsheet data into a predetermined format that can be displayed by a Web browser in response to the update processing of the spreadsheet data; and d) the spreadsheet that has been converted by the one terminal station. A step of transmitting the access URL to the data to another terminal station, and e) a web in which the web browser of the other terminal station which has received the access URL specifies the access URL.
A step of making an access and displaying a video received from another terminal station and the updated spreadsheet data on a monitor.

According to a ninth aspect of the present invention, there is provided a device connected to the network for sharing spreadsheet data between the terminal stations connected via the network, comprising: a) each terminal station via the network. A means for managing the spreadsheet data to be updated, and b) a predetermined spreadsheet program capable of automatically displaying the spreadsheet data in a web browser in response to the spreadsheet data update processing executed by each terminal station. It is characterized by comprising means for converting into a format, and c) a Web server for distributing the spreadsheet data converted into the predetermined format.

According to a tenth aspect of the present invention, there is provided a system for sharing spreadsheet data between terminal stations connected via a network, wherein a) spreadsheet data updated from each terminal station via the network is processed. Means for managing, b) means for automatically converting the spreadsheet data into a predetermined format that can be displayed by a Web browser in response to the update processing of the spreadsheet data executed by each terminal station; ) Notifying each terminal station of the URL that is the access path to the spreadsheet data converted into the predetermined format, and indicating the access destination of the Web browser of each terminal station to the UR
And a means for changing to L.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a video conference system of the present invention will be described below with reference to the drawings.

<1. Overall Configuration of System> FIG. 1 is an overall system diagram of a video conference system. Each terminal of the video conference system plays various roles depending on the usage pattern of the system. When the video conference system is used in the field of management consulting, as shown in the figure, the terminal station plays a role of a consultant station that consults with the client and a client station that the client uses. If the video conference system is used in the educational field, each terminal station plays a role of an instructor station and a student station as shown in the figure. In the following description, the case where the video conference system is applied to consulting will be described as an example.

The consultant station 10 used by the consultant and the client station 20 used by the client
And a base server station (hereinafter, referred to as a relay server) that relays transmission data and controls connection via a network (communication network).
Base station) 30. In the following description, the consultant station 10 and the client station are collectively referred to as a terminal station as appropriate.

Here, as an example, one consultant station 10 and a plurality of client stations 20a, 20b, ...
・ Consulting will be conducted between and.

As shown in the figure, each terminal station is equipped with a video telephone device, a combination of a TV and a set top box,
It is composed of a PC and the like. Alternatively, it may be configured by a mobile phone, a PDA, or the like. When the terminal station is configured by a PC, the PC includes auxiliary devices (camera, monitor, microphone, speaker, operation unit, etc.) for performing bidirectional communication of video, audio, control data, etc., and HTTP. Equipped with various software for information communication.

The network to which each terminal station and base station are connected is composed of various types of communication lines.
Examples include Internet networks, leased lines, telephone lines, and so on. Also, ADSL using analog line
Also, cable TV networks are used.

<2. Functions of Each Terminal Station> Next, referring to FIG. 2, the consultant station 10 and the client station 2
0, the function of the base station 30 will be described.

Although the consultant station 10 and the client station 20 have some functional differences due to the differences in their roles, they are basically provided with substantially the same basic functions as a terminal station for video-audio conferences. ing.

The consultant station 10 and the client station 20 have, as their common functions, video / audio transmitting units 11 and 21, video / audio receiving units 12 and 22, and Web, respectively.
The browsers 13 and 23, the URL notification units 14 and 24, and the table data update units 15 and 25 are provided. The consultant station 10 also includes an update authority management unit 16.

The video / audio transmitting units 11 and 21 are a camera for acquiring video, a microphone for acquiring audio, a processing unit for performing encoding processing, compression processing and the like on video and audio input from the camera and microphone, Further, it includes a communication processing unit for sending video and audio data to the communication network side.

The video / audio receiving units 12 and 22 are a communication processing unit that receives video and audio data from the communication network side, a processing unit that performs decompression processing and composite processing on the received video and audio data, and outputs video. Includes a monitor to operate, a microphone to output audio, etc.

The table data updating units 15 and 25 are connected to the base station 30.
Function to access the table data TD stored in the table via the network and refer to the table data TD
It is equipped with a function to make modifications. Generally, the table data updating units 15 and 25 are composed of spreadsheet software. In other words, the consultant station 10 and the client station 20 are each installed with spreadsheet software capable of operating the spreadsheet data TD managed by the base station 30. By opening the spreadsheet data TD via the network, , Various operations are possible.

The details of the functions of the URL notifying units 14 and 24 will be described later, but when the table data TD is updated, it is a functional unit for notifying each terminal station of the access path to the updated data. .

The update authority management unit 16 of the consultant station 10 uses the table data TD from each client station 20.
This is a functional unit that manages access authority to the. The access authority to the table data TD includes various authority such as write authority and read authority as well as operation authority such as access authority for each file and access authority for each spreadsheet. In the present embodiment, the read authority (reference authority) is given to each client station 20 in principle, and the write authority (update authority) is individually given.

<3. Functions of Base Station> Next, functions of the base station 30 will be described. The base station 30 is roughly divided into 3
Function unit, that is, the relay function unit 31 and the Web distribution unit 3
2. The database management unit 33 is provided.

The relay function unit 31 is used by the consultant station 10
A streaming relay unit 313 that relays and transmits the video / audio data transmitted from each client station 20 to the client station 10 and the consultant station 10, respectively. The connection control units 311 and 312 are communication interfaces, and perform transmission / reception control, transmission destination address control, and the like.

The Web distribution unit 32 is a Web server 321.
By operating, the Web content CD can be distributed. The Web content CD is data described in HTML or the like, and the consultant station 10 and the client station 20 can browse the Web content CD using the Web browsers 13 and 23.

Although the details of the content conversion section 322 will be described later, the table data TD is input and the table data TD is set to W.
Convert to a given format for distribution as eb content.

The database management unit 33 stores table data TD that can be operated by spreadsheet software in a storage medium such as a hard disk. Further, the table data TD includes update authority management information AD. The update authority management information AD stores information for managing the access authority of the client station 20 to the table data TD. However, the update authority management information AD may be managed as data different from the table data TD.

The table data TD is set as network shared data so that the consultant station 10 and the client station 20 can be accessed via the network. Therefore, the consultant station 10 and the client station 20 can refer to and update the table data TD by using the table data update units 15 and 25.

<4. Details of Process> First, the terminal station of the consultant station 10 and each client station 20 is the base station 3
A connection request is made to 0, and a session is established between each terminal. As a result, the image acquired by the camera of each terminal station 10, 20 and the sound collected by the microphone are transmitted to the other terminal stations 10, 20. Also, the video and audio transmitted from other terminal stations are output from the monitor and speaker. In this way, real-time communication using video and audio becomes possible.

While communicating with video and voice, each terminal station 10, 20 can further activate the Web browsers 13, 23 and display common table data on the Web browsers 13, 23. .

FIG. 3 is an image diagram when consultant A and client B are conducting consulting. Terminal monitor 10a of the consultant station 10
Video of Consultant A, ImA, Client B
The image ImB and the table data ImT are displayed. Further, the image ImA of the consultant A and the image Im of the client B are also displayed on the terminal monitor 20a of the client station 20.
B, the table data ImT are displayed.

Here, the table data ImT is the Web content CD stored in the base station 30. As described above, the content conversion unit 32 is included in the Web content CD.
Table data T converted into a predetermined format in 2
D is included.

Here, when the predetermined format is the HTML format, the table data TD is directly converted into the HTML data. For example, the vertical and horizontal frames of the table data TD are H
It is represented by the <table> tag in TML data. Numerical data is described as text information. The HTML data created in this way is static information and is displayed on the terminal monitor as table data ImT.

Further, the predetermined format is GIF, TI
In the case of image data such as FF and JPEG, the table data TD is converted into image data as a table. Then, in the HTML data, for example, the <IMG> tag is used to specify the path of the image data.
As a result, when the Web content CD is displayed, the imaged table data ImT is displayed on the terminal monitor.

If the predetermined format is a document file format or the like, the table data TD is converted into the predetermined document format. What is the prescribed document format?
This is a document format that can be displayed on a Web browser using a plug-in or the like, and for example, a PDF format or the like can be considered. Then, a link to the converted document file is described in the HTML data. This makes We
For example, the table data converted into the PDF format can be displayed on the browser.

In this way, the content conversion section 322 is
The table data TD is converted into a predetermined format that can be displayed by the Web browser. The predetermined format that can be displayed by the Web browser is called by not only the HTML data format but also the description in the HTML data.
b The data format that can be displayed on the browser is also included. The unit of the table data TD on which the content conversion unit 322 performs the conversion process is not particularly limited. For example, conversion may be performed for each spreadsheet, or a range designated by the user may be converted.

Further, the content conversion section 322 has a function of converting the numerical information contained in the table data TD into graph image information. The content conversion unit 322 converts the numerical information managed in the table data TD according to a predetermined rule into an image such as a bar graph, a pie chart, or a line graph that visually represents the meaning of the numerical information. Then, the graphed image is embedded in each of the data formats described above.

For example, if the table data TD is converted to the HTML format, the graphed image is designated using various tags. Further, when the table data TD is converted into image data, one or a plurality of table and graph images become image data, which are designated using various tags in the HTML document. Further, when the table data TD is converted into the PDF format, the graph image is captured in the PDF data.

Numerical information to be graph-imaged in this manner may be explicitly designated when the table data TD is updated by using the table data update units 15 and 25, or the table is updated. When defining the data TD, numerical information to be graphed may be designated.

For the Web content CD generated in such a format, the Web content C is created by specifying the URL from each Web browser 13, 23.
D will be distributed to each terminal station and displayed on the monitor.

That is, the user (consultant, client) of each terminal station updates the table data TD of the base station 30 by using the table data update units 15 and 25, and in response to this update processing, Automatically, table data TD
Is converted into a Web content CD, and the graphing target data is automatically converted into a graph image so that the Web server 321 can deliver the data.

On the monitor of each terminal station, the images of the consultant and other clients are displayed while being sequentially updated, and the table data updated by the consultant or the other clients are visually displayed. . At this time, the image and the table data may be divided into screens and displayed, or the combined display such as embedding the table data in a part of the image may be performed. in this way,
By displaying the image and the table data in a composite manner, it is possible to refer to the latest table data while communicating with the image and voice.

As described above, the consultant station 10
The update authority management unit 16 updates the access authority for the table data TD of each client station 20 to the update authority management information AD.
I am trying to manage as. Therefore, when the table data update unit 15 of each client station 20 executes the update process for the table data TD, the database management unit 33 verifies the update authority of the client of the access source, and the verification is successful. Only in this case, execution of the update process is permitted for the table data TD. Further, the access restriction may be applied to the reference processing of the table data TD.

Through the above-described processing, the consultant or the client changes the table data TD to generate the Web content CD. And
The URL notification units 14 and 24 of the consultant station 10 and the client station 20 that have executed the update process are displayed on the Web browsers 13 and 23 of the other terminal stations.
Notify the URL of the content CD. The Web browsers 13 and 23 of the respective terminal stations that have received this notification make an access request specifying the URL to the Web server 321. As a result, the same Web content CD is displayed on all the terminal stations 10 and 20 at the same time.

In order to realize the above function, the URL notification unit 1
Reference numerals 4 and 24 have a function of linking with the table data updating units 15 and 25. That is, when the table data updating units 15 and 25 update the table data TD of the base station 30, the URL notifying units 14 and 24 are notified of that fact.
Next, the URL notification units 14 and 24 acquire the URL of the updated table data TD from the content conversion unit 322 of the base station 30 (this URL is hereinafter referred to as update URL). Then, the URL notification units 14 and 24 update the acquired update U with respect to the Web browsers 13 and 23 of the other terminal stations.
The RL is notified. Web browser 1 of each terminal station
Upon receiving the update URL, the browsers 3 and 23 change the designated URL of the browser to the update URL. In this way, the updated table data is displayed on the Web browsers 13 and 23 of each terminal station.

In this way, in response to the updating process of the table data updating units 15 and 25, the URL notifying units 14 and 2 are automatically set.
4 notifies the URL so that the operation is simpler.
It is possible to notify each terminal station of the update of the table data more quickly. However, the URL notification processing by the URL notification units 14 and 24 may be manual processing. That is, the consultant A and the client B are the table data update unit 1
After updating the table data TD using 5, 25, the URL
This is to explicitly issue the update URL acquisition instruction and the update URL notification instruction to the notification units 14 and 24. Then, in response to this instruction, the URL notification units 14 and 24 notify each terminal station of the updated URL.

URL notification unit 1 having such a function
4, 24 may exist as a module incorporated in the software forming the table data updating units 15, 25, or may exist as dedicated software.

Further, when a URL is notified from another terminal station, the function unit for transmitting an access request designating this URL to the Web server 321 exists as other dedicated software that cooperates with the Web browser. It may be present, or may be present as a function added in to the Web browsers 13 and 23.

The function relating to the URL notification described above is
The purpose is to reflect the update of the table data TD to other terminal stations as automatically as possible, but this function is not essential. For example, assume that each participant has already referred to the same table data using a Web browser. In this state, when a specific person updates the table data, other participants manually select the "update button" of the browser by notifying by voice the contents such as "I updated the data". As a result, it is possible to smoothly refer to the updated table data.

As described above, according to the video conference system of the present embodiment, the latest table data is W
Since it is distributed to each terminal station in the form of eb contents, each terminal station can share table data without requiring special software or the like. Also, the table data is W
Since the eb contents are stored in the base station after being made into contents, it is not necessary to store data on the local disk of each terminal station, and resources can be effectively used. In particular, if a recent broadband environment is used, tabular data and graph images can be displayed easily via the network, which is effective.

<5. Modification> In the above-described embodiment, the table data TD managed by the base station 30.
Have been described as generally operable by spreadsheet software. Therefore, by installing the spreadsheet software in each terminal station, it is possible to update the table data TD in each terminal station. On the other hand, the table data TD may be configured by a general-purpose database that does not depend on specific software, and the general-purpose program may be used to access the database. As a general-purpose program,
For example, by using CGI, not only the reference of the table data but also the update processing of the table data can be unified on the Web browser.

Further, in the above-mentioned embodiment, the terminal station that has updated the table data updates U to another terminal station.
Although the RL is notified, the base station 30 may transmit the update URL to each terminal station when the table data is updated.

[0069]

As described above, according to the invention described in claim 1, since the spreadsheet data updated via the network is automatically converted into the format that can be displayed by the Web browser, each terminal station It is possible to share the latest updated tabular data. Further, since the system is combined with a videophone, it is possible to examine and consult the results of the updated data with immediate video and audio.

According to the second aspect of the present invention, since the spreadsheet data is converted into the HTML format, each terminal station can easily refer to the latest spreadsheet data by using the Web browser.

According to the third aspect of the invention, since the spreadsheet data is converted into image data, each terminal station can easily refer to the latest spreadsheet data by using the Web browser.

According to the fourth aspect of the invention, since the spreadsheet data is converted into a document file, each terminal station can easily refer to the latest spreadsheet data by using the Web browser.

According to the fifth aspect of the invention, since the numerical information is converted into the graph image information, the correction of the numerical information made at each terminal station is immediately transmitted as a graph image to each terminal station.

In the invention according to claim 6, since the URL associated with the updated spreadsheet data is notified to the other terminal station and the display content of the Web browser of the other terminal station is updated, it is performed by one user. The data update process that has been omitted will be automatically notified to other users. This enables quick information sharing. For example, by using this system for consulting or the like, the result of the management information input by the consultant in real time is immediately notified to the users of other terminals. On the contrary, the consultant can confirm the data corrected by the users of other terminals in real time.

In the invention described in claim 7, since the management terminal station gives each terminal station the right to update the spreadsheet data, the reliability of the spreadsheet data can be maintained.

The invention according to claim 8 is a method invention, and it is possible to share table data in which update information is promptly reflected while performing bidirectional communication by video and audio. Remote communication while referring to data is possible.

The invention according to claim 9 relates to an apparatus for sharing spreadsheet data, and since the spreadsheet data to be updated is automatically converted into Web contents and distributed, the spreadsheet data is shared. The user can easily and quickly refer to the latest spreadsheet data.

According to the tenth aspect of the invention, there is provided a system for promptly reflecting the update of the spreadsheet data in each terminal station, and a plurality of remote users can share the sequentially updated spreadsheet data. Further, since the Web browser automatically accesses the updated table data, the operability is good.

[Brief description of drawings]

FIG. 1 is an overall image diagram of a video conference system.

FIG. 2 is a functional block diagram of each terminal station and base station.

FIG. 3 is an example diagram when consulting is performed using the video conference system according to the present embodiment.

[Explanation of symbols]

10 Consultant Bureau 13 Web browser 14 URL notification section 15 Table data update section 16 Update authority management department 20 client stations 23 Web browser 24 URL notification section 25 Table data update section 30 base stations 31 Relay Function Section 32 Web Distribution Department 33 Database Management Department AD update authority management information TD table data CD Web content

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Claims (10)

[Claims] 1. A video conference system for transmitting and receiving video and audio between terminal stations connected via a network, comprising: a) a plurality of terminal stations, and b) each terminal station connected via a network. A base station, wherein the base station b-1) relay means for relaying video and audio transmitted and received between each terminal station, and b-2) a table that is updated from each terminal station via a network. B-3) means for managing the calculated data, and b-3) means for automatically converting the calculated data into a predetermined format that can be displayed by a Web browser in response to the update processing of the calculated data; ) A Web server that distributes the spreadsheet data converted into the predetermined format, and each terminal station: a-1) While sequentially displaying the images relayed by the relay unit, The spreadsheet that was delivered A video conference system, comprising: a unit for displaying a composite image of the data; and a-2) a unit for outputting the sound relayed by the relay unit. 2. The video conference system according to claim 1, wherein the predetermined format includes a data format described in HTML. 3. The video conference system according to claim 1 or 2, wherein the predetermined format includes an image data format. 4. The video conference system according to claim 1, wherein the predetermined format includes a document file format. 5. The video conference system according to claim 1, wherein the base station further comprises: b-5) Numerical information when converting the spreadsheet data into the predetermined format. A video conferencing system comprising: means for converting the image data into graph image information. 6. The video conference system according to claim 1, wherein each terminal station has a-3) means for updating the contents of the spreadsheet data via a network, and a-4. ) Means for notifying another terminal station of the URL of the Web content associated with the spreadsheet data converted into a predetermined format and updating the display content of the Web browser of the other terminal station. Video conferencing system. 7. The video conference system according to claim 1, wherein a management terminal station, which is one of the plurality of terminal stations, manages the right to update the spreadsheet data. The video conference system, wherein only the terminal station to which the update authority is given can update the spreadsheet data. 8. A video conferencing method for transmitting and receiving video and audio between terminal stations connected via a network, comprising: a) spreadsheet data updated by each terminal station via a network in a base station. A step of storing, b) a process of updating the spreadsheet data while transmitting and receiving video and audio to and from another terminal station at one terminal station, and c) storing the spreadsheet data. A means for automatically converting the spreadsheet data into a predetermined format that can be displayed by a web browser in response to the update processing; and d) the one terminal station providing an access URL to the converted spreadsheet data. A step of transmitting to another terminal station, and e) a web browser of the other terminal station that has received the access URL performs a web access designating the access URL and receives from the other terminal station. And a step of displaying the image and the updated spreadsheet data on a monitor. 9. A device connected to a network for sharing spreadsheet data between terminal stations connected via a network, comprising: a) a spreadsheet that is updated from each terminal station via the network. Means for managing data, and b) means for automatically converting the spreadsheet data into a predetermined format that can be displayed by a Web browser in response to the update processing of the spreadsheet data executed by each terminal station. And c) a Web server that delivers the spreadsheet data converted into the predetermined format, and a spreadsheet data sharing apparatus. 10. A system for sharing spreadsheet data between terminal stations connected via a network, comprising: a) means for managing spreadsheet data updated from each terminal station via the network; ) A means for automatically converting the spreadsheet data into a predetermined format that can be displayed by a Web browser in response to the update processing of the spreadsheet data executed by each terminal station, and c) into the predetermined format. And a means for notifying each terminal station of a URL that is an access path to the converted spreadsheet data and changing the access destination of the Web browser of each terminal station to the URL. Data sharing system.