JP3489448B2 - Multimedia presentation method and system, and storage medium storing multimedia presentation program - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia presentation method and system, and a storage medium storing a multimedia presentation program, and more particularly, to a plurality of people simultaneously receiving the same image through a computer connected by a network. The present invention relates to a multimedia presentation method and system for interactively providing audio, audio, still images, etc., and a storage medium storing a multimedia presentation program.

[0002]

2. Description of the Related Art In a conventional method for giving a presentation to a plurality of users via a network, a computer (server) in which contents to be received are stored, such as the World Wide Web (WWW) of the Internet. There is a method in which the index of the content is known to the recipients of the presentation in advance, and each recipient individually receives the necessary data by transmitting a command in which information specifying the content to be received is stored. .

In addition to the method, a schedule table of contents to be transmitted can be browsed on the network like the Multicast backbone (M-Bone) of the Internet, and when the schedule time comes, the sender side , Using the broadcast function of the network,
There is a method of unilaterally transmitting data and allowing the user who wants to see it to receive it without permission.

Further, as in Japanese Patent Laid-Open No. 9-130779,
There is also a method of determining whether the request from the recipient is valid on the server side and delivering the content to the recipient only when it is determined to be valid.

[0005]

When the user individually retrieves the contents from the server like WWW, the user can receive the desired data, but
In some cases, a large amount of access is concentrated on the server that stores the content, and the processing capacity of the server becomes insufficient to satisfy the user's request. Further, when the same content is desired to be sent to the users at the same time, all the users who receive the content are requested to send the content transmission request command at the same time. Therefore, in order to interactively send contents to multiple terminals in response to a user's request like a presentation, the server must process many commands and additionally send contents individually.
There is a problem that many users cannot send due to the limitation of the processing capacity of the server.

Further, when the user receives the content sent by the sender in the same manner as the M-bone, the user can obtain only the content sent by the sender at that time. In addition, in order to obtain the necessary content, it is necessary to obtain in advance from the sender of the content schedule information about when the content is to be transmitted. Then, it is necessary to prepare in front of the terminal according to the time when the content is transmitted. Therefore, there is a problem in that if you are a little late or miss the schedule information, you may not be able to receive the content you really need.

In the case of Japanese Unexamined Patent Publication No. 9-130779, it is difficult to set a criterion on the server side. For example, as in the disclosed embodiment, when the determination criterion is to accept only the request from the parent terminal, if a request is made from a terminal other than the parent terminal, the parent terminal (or,
It is necessary to ask the person who operates it), and it imposes a heavy burden on the parent terminal (or the person who operates it). Also, for example, if you set a criterion to execute the same request several times when it receives the same request, there will be a time lag between the first request and the request being processed, and the request will be executed. In that case, there is a problem that the request is no longer necessary for the person who first makes the request, so it is virtually impossible for the server to judge.

The present invention has been made in view of the above points, and it is a storage medium storing a multimedia presentation method and system and a multimedia presentation program capable of increasing the requirements of a portion to be viewed interactively in real time. The purpose is to provide. Moreover, the further purpose is
A storage medium storing a multimedia presentation method and system and a multimedia presentation program capable of determining unnecessaryness on the terminal side and eliminating determination on a server.

[0009]

FIG. 1 is a diagram for explaining the principle of the present invention. This onset Ming, a computer group including a plurality of computers in a multi-media presentation method in a computer system comprising a network connecting the computer group, from any computer in the computer group, to another any computer , Transmitting a transmission request command in which information designating transmission data is stored via the network (step 1), and the computer receiving the transmission request command stores the transmission data designated by the transmission request command. (Step 2), using the broadcast function of the network, the transmission data specified by the transmission request command is simultaneously transmitted to any of a plurality of computers in the computer group (step 3) , Share data on multiple computers Sometimes sent
The computer that is running over the network
Send a send stop command to stop sending data.
The computer that received the command and received the command
To the issuer of the transmission stop command based on the
Stop transmission of data and specify by transmission stop command
Confirm that the sent data is stored and send
Data is sent to the computer using the broadcast function of the network.
Data to multiple computers in the data group at the same time
(Step 4).

[0010]

[0011]

[0012] The onset bright receives the command, the computer configured to transmit the transmission data, information relating to the transmission data at the time of transmission of the transmission data, and applied to a predetermined position of the transmission data, broadcast network The transmission data is transmitted using the function, and the computer that receives the transmission data determines whether or not to receive the data based on the information regarding the transmission data added to the transmission data.

FIG . 2 is a block diagram showing the principle of the present invention. This <br/> onset Ming, a computer group including a plurality of computers, a multimedia presentation system in a computer system comprising a network connecting the computer group for any computer, via a network, A first computer 100 having a command transmitting means 110 for transmitting a transmission request command in which information designating transmission data is stored, a data receiving means 120 for receiving transmission data from an arbitrary computer, and transmission data are stored. Using the data storage means 230, the command reception means 210 for receiving the transmission request command, the transmission data search means 220 for searching the transmission data specified by the transmission request command from the data storage means, and the broadcast function of the network, First computer Has for any of a plurality of computers in a computer group including a broadcast unit 240 for transmitting the transmission data designated simultaneously by sending a request command, the second computer 200 with the first con
The command transmitting means 110 of the computer 100 is
The computer 200 receives data via the network.
Send a command to stop sending the data.
And a second computer including a transmission stop command transmitting unit.
The data 200 transmits the data based on the transmission stop command.
Data transmission stop means for stopping the
Specified by the transmission stop command by the search means 220
The transmitted data is extracted and transmitted by the broadcast means 240.
Data using the broadcast function of the network.
Computer, including any computer
Control means for controlling simultaneous transmission to the data
Mu.

[0014]

[0015]

The broadcast unit 240 of the onset light of the second computer 200, the information about the transmission data at the time of transmission of the transmission data includes information providing means for providing a predetermined position of the transmission data, the second The computer, which has received the transmission data from the computer 200, receives the data by the reception determination unit that determines whether to receive the data based on the information regarding the transmission data added to the transmission data. In the case of rejecting, the device includes means for discarding the received data.

[0017]

[0018]

[0019]

[0020] The onset Ming, sends a computer group including a plurality of computers, a storage medium storing a multimedia presentation program in a computer system comprising a network connecting the computer group receives commands, data is mounted on computers, a command receiving step of receiving the transmission request command, transmits data to find the transmission data designated by the Lud <br/> over data storing means has stored the transmission data by the transmission request command A search step ,
A broadcast step of simultaneously transmitting the transmission data designated by the transmission request command to any of a plurality of computers in the computer group using the broadcast function of the network;
When the transmission stop command is received, the transmission stop command
A stop transmission step to stop transmitting data based on
The transmission cancellation command is performed by the transmission data retrieval step.
The transmission data specified by the
According to the step, the transmission data is transferred to the network.
Using the report function,
Control to send to computer simultaneously
Stores steps and programs that execute.

[0021]

[0022] The onset bright broadcast step, the information about the transmission data at the time of transmission of the transmission data, including the information imparting step of imparting a predetermined position of the transmission data. As described above, according to the present invention, first, information regarding transmission data (for example, a file name or transmission is started to a computer (server) in which a user stores information desired to be shown to other users via the computer. Send the command including the position on the file). Upon receiving the command, the server determines whether or not there is designated data, and starts transmission to a plurality of terminals using the broadcast function of the network. Then, if another user requests another data related to that data, or a different portion of the same data than is currently being sent, send a command to the server to stop sending, and A new transmission request command is transmitted to the server in which the necessary data is stored, and the server receiving the command starts transmitting new data.

In addition, it becomes possible to insert the information of the data into the processing position of the data at the time of transmitting the data, and the terminal side receiving the data can decide whether to reproduce or discard the data.

[0024]

FIG. 3 shows the system configuration of the present invention. The system shown in the figure has a configuration in which a plurality of computers (terminals, servers) are connected via a network (not shown). Here, a computer that stores content and provides data to another computer will be referred to as a server 200, and the other computer will be referred to as a terminal 100.

Each of the terminals 100 _{1 to} 100 _n generates a command and transmits the command to the server 200.
And a data receiving unit 1 for receiving data from the server 200
It consists of 20. The server 200 includes a command receiving unit 210 that receives a command from the terminal 100, a database 230 that stores data to be transmitted, a data search unit 220 that searches the database 230 based on the received command, and a terminal that retrieves the searched data. A data transmission unit 240 that broadcasts to 100, and a transmission control unit 2 that controls transmission, transmission stop, etc. based on the received command.
It consists of 50.

Terminal 100₁Users are in other users
When you want to show information, the terminal 100 ₁To server 200
Send request command to. The transmission request
The command contains the file name and the storage location of the transmitted data (read
Information such as the protruding position) is included. The server 200 is the terminal 1
00₁When a send request command is received from
Data corresponding to the command is stored in
Search for The retrieved data is sent to the data transmission unit
240 is the terminal 100₁Terminal 100 including₂~ 100_n
Broadcast to.

Further, as described above, when the user wants to see other data at the terminal 100 which has received the data,
If you want to see the data related to the data sent,
A transmission stop command for stopping transmission of the transmission data is issued to the server 200. Server 200
When receiving the transmission stop command, the transmission control unit 250
Analyzes the command and causes the data transmission unit 240 to stop the transmission of the transmission data.

Further, the data transmission unit 24 of the server 200
0, when broadcasting the transmission data to the terminal 100,
Information related to the transmission data (summary of data information, etc.) is inserted into the transmission data and transmitted. Accordingly, when the terminal 100 receives the transmission data, it is possible to refer to the related information and determine whether to receive or discard the transmission data.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows the configuration of a general computer system to which an embodiment of the present invention is applied. In the figure, computers (servers) 1 and 2 in which contents such as video information and text information are stored, computers (reproduction-only terminals) 3, 4, 5, and 6 having reproduction functions, both server functions and reproduction functions. A computer (reproducing terminal that also serves as a server) 7 and a network 8 having a broadcasting function for connecting the server and the reproducing terminal.

The network 8 having the broadcast function includes Ethernet and F which are used as an in-house network.
There is a DDI (Fiber Distributed Data Interface) network. In the example of FIG. 4, in order to show a general-purpose configuration,
Multiple servers, playback-only terminals, server-only playback terminals 3
Although the system configured by types is shown, it is possible to operate as a system if there is at least one computer having a server function and one computer having a reproducing function.

A general configuration of the server used in the present invention will be described. FIG. 5 shows the configuration of a server to which an embodiment of the present invention is applied. The server shown in the figure receives a request from a magnetic disk 21 for storing content, a disk interface 22 for connecting the magnetic disk 21, a network interface 23 for transmitting content on the network, and a playback terminal. CPU (processing unit) 24 for processing, memory 2 for temporarily storing contents read from the magnetic disk 21
5, a disk interface 22, a network interface 23, a CPU 24, and an internal bus 26 for connecting the memory 25.

FIG. 6 shows the structure of a reproducing terminal to which an embodiment of the present invention is applied. The reproduction terminal shown in the figure includes a decoder 31 for reproducing contents (video, audio, etc.), a network interface 32 for communicating with a server via the network 8, and a CPU for processing data sent from the server. (Arithmetic unit) 33, decoder 3
1, a display 34 for displaying the output from 1, an input device 35 such as a keyboard and a mouse for inputting a request from a user, a memory 36 for temporarily storing received data, a decoder 31, a network interface 32, It is composed of an internal bus 37 for connecting the CPU 33 and the memory 36.

FIG. 7 shows the structure of a server / playback terminal to which an embodiment of the present invention is applied. The server-combined reproduction terminal shown in the figure includes a decoder 31 for reproducing an image and a display 3 for displaying contents on the server shown in FIG.
4. A configuration in which an input device 35 for receiving a request from a user is added, and a magnetic disk 41 for storing content, a disk interface 42 for connecting the magnetic disk 41, and for transmitting content on a network Network interface 4
3. CPU for receiving and processing requests from playback terminals
(Arithmetic unit) 44, memory 45, decoder 46 for reproducing contents (video, audio, etc.), input device 4
7, display 48, disk interface 42,
It is composed of a network interface 43, a CPU 44, a memory 45, and an internal bus 49 for connecting the decoder 46.

The processing operation using the above apparatus will be described. First, it is assumed that a user (recipient) who receives a presentation sits in front of each of the terminals 4, 5, 6, and 7 in FIG. 4, operates the terminals, and listens to and listens to the transmitted contents. A user (practitioner) who gives a presentation is supposed to sit down in front of the terminal 3 in FIG. 4 and give a presentation.

FIG. 8 is a communication sequence diagram of a presentation according to an embodiment of the present invention. Step 101)
The content desired to be sent to the recipient is designated from the terminal 3 in FIG. The practitioner operates the input device 35 shown in FIG. 6 to display a list (menu) of contents stored in the server 2 shown in FIG. 4 on the display 34 shown in FIG. 6, and then selects the content to be transmitted next. The menu is downloaded in advance from the server 2 of FIG. 4 to each terminal using the network 8 and transmits a command (transmission request command) for requesting the transmission of the content via the network 8.

Step 102) The server 2 checks whether or not the requested content is in the magnetic disk 21 of FIG. 5, and if there is such content, reads the content from the magnetic disk 21 and uses the magnetic disk interface 22, Memory 25 via internal bus 26
Accumulate at once. Then, in order to send the data to the network 8, the CPU 24 is used to divide the transmission data, and the packet header including the destination address information and the like is attached (packetizing process), and the internal bus 26 and the network interface 23 are connected. Via the network 8 via the broadcast function of the network.

Step 103) When carrying out the packetizing process, one of the addresses (broadcast address) for broadcast communication which is pre-allocated as a destination address is given, and in addition, The address of the server 2 is also given as an address. The address for broadcast communication used in the presentation is directly notified to each terminal or the recipient in advance.

Each terminal receives the content delivered by the broadcast function of the network 8 in the form of a packet. The reception process at the terminal is performed according to the following procedure. First, a packet is received from the network interface 32 and temporarily stored in the memory 36 via the internal bus 37. Next, the transmission destination address information of the accumulated packet is read by using the CPU 33, it is checked whether it matches the notified broadcast address, and if it matches, the data is left as it is in the memory 36. If they do not match, they are discarded from the memory 36. The data remaining on the memory 36 is sent to the decoder 31 via the internal bus 37 after removing the packet header, and the content is reproduced. In this embodiment, a hardware decoder is used as the decoder, but the same reproduction can be performed using a software decoder that uses the CPU 33. Further, as in the present embodiment, by determining the broadcast address before reproduction, it is possible to prevent contents of other groups from being reproduced by mistake.

In the middle of reproducing the content, the receiver of the terminal 4 rewinds the portion reproduced immediately before,
When the user wants to play the content, the receiver operates the input device while looking at the display of the terminal 4, and the portion of the content to be played (for example, time information such as “30 minutes from the beginning” or “100 frames from the end”). (Eg, frame information such as “eye”), and a command (intermediate reproduction request command) including the information is specified via the network 8 to the terminal 4
To the server 2. It can be determined from which server the content is received by examining the source address information of the received packet. The server 2, which has received the midway reproduction request command, interrupts the content read processing and the transmission processing that have been performed up to that point, and restarts the reading from the magnetic disk starting from the content portion designated by the command. Start sending in the same manner as.
Further, when it is desired to reproduce a content that is being reproduced, rather than a content that has been received in the past, the same procedure can be executed.

Step 104) When the receiver of the terminal 5 wants to reproduce another content, the server 2 issues a command (another content transmission request) in which information of the content to be reproduced is stored using the terminal 5. Send to. In the server 2 which has received the request, step 103
Similarly, the reading and transmission of the contents are interrupted. Then, the content requested by the command is read from the magnetic disk and the transmission is restarted.

Step 105) Subsequently, when the user of the terminal 6 wants to reproduce the content stored in the server 1, a command (stop transmission from the terminal 6 to the server 2 which is currently transmitting the content) first. Send stop command). The server 2, which has received the command, stops reading and transmitting from the magnetic disk.
Then, from the terminal 6 to the server 1, step 101
Similarly, the server 1 that transmits the reproduction request command and receives the command reads the content from the magnetic disk and starts transmission.

Step 106) Finally, when the practitioner of the terminal 3 wants to end the presentation, the terminal 3
Can be used to send a transmission stop command to the server 1 and end. In the present embodiment, the terminal and the server are specified and described, but it is naturally possible to implement them on any terminal and any server.

In addition, a forward or backward fast forward exclusive file is previously stored as content in the server 2, and in step 104, another content transmission request command designating the fast forward exclusive file is transmitted from the terminal 5. By doing so, it is possible to realize forward fast forward and reverse fast forward. Further, a temporary reproduction stop command and a reproduction restart command are provided so that the server that receives the temporary reproduction stop command temporarily stops the transmission and the server that receives the reproduction restart command restarts the transmission of the content. Slow playback can be realized by using a pause (pause) or a decoder capable of slow playback.

The processing on the server side up to now will be described below. FIG. 9 is a flowchart of processing of the server according to the embodiment of this invention. When the server starts up, the transmission flag is first cleared (step 201). This flag is a flag indicating whether or not the content is currently being transmitted, and is set when the content is being transmitted, and cleared otherwise.

First, it is checked whether or not a command is received from the terminal (step 202). If the command is not received, it is checked whether the content is being transmitted (step 203). If it is not transmitting, do nothing and wait for the command to be received. If it is being transmitted, the position (cylinder number, sector number, etc.) on the disk where the content to be transmitted next is stored is calculated (step 204). Then, the content is read based on the calculation result, packetized, and broadcasted to the terminals (steps 205 to 207).

When a command is received from the terminal (step 202, yes), the processing is divided according to the command (step 208). In the case of a transmission request, it is checked whether or not the requested content is stored in its own disc (step 209), the position of the beginning of the content on the disc is calculated (step 210), and the content is read from the beginning. Start (step 211),
It is packetized (step 212) and broadcasted (step 213). Then, the transmitting flag is set (step 214).

When the midway reproduction request command is received,
The in-transmission flag is checked (step 215), and if it is being transmitted, the requested portion is searched (step 216), and the transmission is started from there (steps 218 to 220). In the case of another content reproduction request, the in-transmission flag is also inspected (step 221), and the content is read from the beginning and transmitted as in the transmission request (steps 222 to 226).

In the case of the transmission stop request, the in-transmission flag is cleared and the process ends (step 227). By doing so, the next transmission will not be performed. If the above method is used, even if some of the recipients do not want to be interrupted, the same content after the interruption is delivered to all the recipients even if they are interrupted. Therefore, when the content is transmitted from the server, information regarding the content (file name, number of frames from the beginning of the content, number of seconds, etc.) is added to a predetermined position of the content (for example, the beginning of the packet), and the content is transmitted . Then, on the receiving side, it is possible to inspect the information every time the packet is received, and confirm whether or not the content unintended by the receiver has not arrived.

FIG. 10 is a sequence diagram of an operation in the case where the information regarding the content of the embodiment of the present invention is added. In the figure, the file ID (File
It is assumed that the content whose ID is "1" is being transmitted. Step 301) In the present embodiment, it is assumed that the content information is given a physical ID and a frame number (FramID) in the case of video content for each packet. Then, during the reception of the third frame, the terminal 4 transmits an intermediate reproduction request command for the seventh frame of the same file to the server 2.

Step 302) The server 2, which has received the command, carries out the broadcast transmission in order from the packet whose FramID is "7". The receiver of the terminal 5 wanted to see the continuation, but since the frame 7 has been transmitted, in order to receive the continuation, the transmission request specifying the same File ID and Frame ID is transmitted to the server 2 and the reception is received. Discard the packet.

Step 303) The server 2, which has received the transmission request, uses another broadcast address and uses File ID = 1 and Fram I as the second content stream.
The content of D = 4 is transmitted by using the broadcast. By using the above method, it is possible to deal with the case where some receivers want to receive the continuation of the interrupted content.

Further, in FIG. 3, each constituent element included in the terminal and the server is constructed as a program, and a disk device connected to a computer used as the terminal and the server or a portable disk such as a floppy disk or a CD-ROM. The present invention can be easily realized by storing it in a storage medium and installing it when carrying out the present invention.

The present invention is not limited to the above embodiments, and various modifications and applications are possible within the scope of the claims.

[0054]

[Effects of the Invention] Conventionally, a recipient of a presentation unilaterally receives the presentation until the end, makes a request to the implementer of the presentation when all the presentations are completed, and replays a portion to be viewed or listened to again. However, according to the present invention, it is possible to make a request in real time and interactively, so that active discussions can be made. In addition, special playback such as fast forward, pause, and slow playback can be interactively performed.

Further, by making the terminal side determine whether data is necessary or not, the determination at the server can be eliminated, and the necessary data can be received by the receiver when needed.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of the present invention.

FIG. 2 is a principle configuration diagram of the present invention.

FIG. 3 is a system configuration diagram of the present invention.

FIG. 4 is a configuration diagram of a general computer system to which an embodiment of the present invention is applied.

FIG. 5 is a configuration diagram of a server to which an embodiment of the present invention is applied.

FIG. 6 is a configuration diagram of a playback terminal to which an embodiment of the present invention is applied.

FIG. 7 is a configuration diagram of a server / playback terminal to which an embodiment of the present invention is applied.

FIG. 8 is a communication sequence diagram of a presentation according to an embodiment of the present invention.

FIG. 9 is a flowchart of processing of a server according to an embodiment of the present invention.

FIG. 10 is a sequence diagram of an operation when information about content is added according to an embodiment of the present invention.

[Explanation of symbols]

1, 2 server 3, 4, 5 6 Playback-only terminals 7 Server and playback terminal 8 networks 21 magnetic disk 22 Disk interface 23 Network Interface 24 CPU 25 memory 26 internal bus 31 decoder 32 network interfaces 33 CPU 34 display 35 Input device 36 memory 37 Internal bus 41 magnetic disk 42 disk interface 43 Network interface 44 CPU 45 memory 46 decoder 47 Input device 48 display 100 First computer, terminal 110 Command transmission means, command transmission section 120 data receiving means, data receiving section 200 Second computer, server 210 Command Receiving Means, Command Receiving Section 220 Transmission data search means, data search unit 230 Data storage means, database 240 Broadcasting means, data transmission unit 250 transmission control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-9-130779 (JP, A) JP-A-8-297624 (JP, A) JP-A-7-15534 (JP, A) JP-A-5- 168008 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 12/00-12/28 H04L 12/44-12/66

Claims (6)

(57) [Claims] 1. A multimedia presentation method in a computer system comprising a computer group comprising a plurality of computers and a network connecting the computer groups, wherein from any computer in the computer group to another arbitrary computer. The transmission request command in which the information designating the transmission data is stored is transmitted via the network, and the computer receiving the transmission request command stores the transmission data designated by the transmission request command. Then, by using the broadcast function of the network, the transmission data designated by the transmission request command is simultaneously transmitted to any of a plurality of computers in the computer group ,
Sending data to multiple computers at the same time
The data is sent to the computer via the network.
Send a transmission stop command to stop the data transmission
The computer that received the command stops sending
Based on the command, the data transmission is stopped and the transmission data specified by the transmission stop command
Confirm that it is stored, and use the broadcast function of the network to send the transmission data.
A plurality of computers in the computer group
A multimedia presentation method characterized in that they are simultaneously transmitted to each other . 2. A computer that receives the command and transmits the transmission data, adds information about the transmission data to a predetermined position of the transmission data when transmitting the transmission data, and broadcasts the network. A method of transmitting the transmission data by using a computer, and determining whether or not to receive the data based on information about the transmission data added to the transmission data in a computer that receives the transmission data.
1. The multimedia presentation method described in 1 . 3. A multimedia presentation system in a computer system including a computer group including a plurality of computers and a network connecting the computer groups, wherein transmission data is transmitted to an arbitrary computer via the network. A first computer having command transmitting means for transmitting a transmission request command in which designated information is stored; data receiving means for receiving transmission data from the arbitrary computer; data storage means for storing transmission data; A command receiving means for receiving the transmission request command, a transmission data searching means for searching the transmission data designated by the transmission request command from the data storage means, and a first computer using a broadcast function of a network. Including For any of the plurality of computers in a computer group, and a second computer having a broadcasting means for transmitting the transmission data is specified simultaneously, the by the transmission request command, the first computer The command transmission means connects the network to the second computer.
Abort command to stop sending data through
It includes a transmission stop command transmitting means for transmitting a de, the second computer, based on the transmission stop command, the transmission stop command
Data transmission stop that stops data transmission to the publisher of the
A stop means, and the transmission stop command is sent by the transmission data search means.
Therefore, the specified transmission data is extracted, and the broadcast means is
To send the transmission data to the broadcast function of the network.
Using the computer including the first computer
Data to multiple computers in the data group at the same time
A multimedia presentation system , comprising: a control means for controlling the multimedia presentation system. 4. The broadcast means of the second computer includes information adding means for adding information about the transmission data to a predetermined position of the transmission data when the transmission data is transmitted, The computer receiving the transmission data from the computer receives the transmission data from the computer based on the information about the transmission data added to the transmission data, the reception determination unit determining whether to receive the data. 4. The multimedia presentation system according to claim 3 , further comprising means for discarding the received data when rejecting. 5. A storage medium, which stores a multimedia presentation program in a computer system including a computer group including a plurality of computers and a network that connects the computer groups, to a computer that receives a command and transmits data. The command receiving step for receiving the transmission request command is installed.
By using the up, transmission data retrieval step of retrieving the transmission data designated by the Lud over data storing means has stored the transmission data by the transmission request command, the broadcast function of the network, any in the computer group To a plurality of computers, the broadcast step of simultaneously transmitting the transmission data specified by the transmission request command, and the transmission stop command from the computer of the command transmission source.
When received, the data is sent based on the send stop command.
Transmission stop step for stopping transmission, and the transmission stop command by the transmission data search step.
The transmission data specified by the
According to the step, the transmission data is transferred to the network.
Using the report function,
Control to send to computer simultaneously
A storage medium storing a multimedia presentation program, which stores a program for executing steps and . 6. The broadcasting step includes an information adding step for adding information about the transmission data to a predetermined position of the transmission data when the transmission data is transmitted.
6. A storage medium storing the multimedia presentation program according to claim 5 , including a program.