JP2003037830A - Information distribution system and therefor, server apparatus, client terminal, distribution source terminal, program, and record medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To distribute information to a client side so that the synchronization of display can be matched without decreasing access performance to original information. SOLUTION: The distribution source terminal 30 transmits entire original information to the server apparatus 70. A database 80 stores entire original information while the information is associated with a low-resolution image. An object compression section 74 converts the high-resolution image included in the received original information to a low-resolution image. An object substitution section 76 uses a low-resolution image to generate substitution information with a small amount of data. A display information output section 78 selects display information to be transmitted to the client terminal 50 from the substitution information based on a display switching signal for transmission. Since the substitution information does not include any high- resolution images, the amount of data is small and it does not take much time for distributing information, so that the synchronization of display can be matched. In printing and editing, original information is read for use from the database 80 in the server apparatus 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information distribution method and system, a distribution source terminal used in this method and system, a client terminal, and a server device, a program, and a computer-readable storage medium storing the program. Regarding More specifically, the present invention relates to a technique for delivering information to remote terminals in real time.

[0002]

2. Description of the Related Art For example, information such as seminars and lesson contents held at a specific place can be sent to a terminal for one or many students at a remote place in real time via a communication network such as the Internet. There is an information distribution system that distributes information in real time to a terminal at a remote place, such as distribution. In such an information distribution system, for example, when a lecturer who is a distribution source switches the information, the same information must be displayed on the screens of the terminals of the students who are the clients in association with it.

On the other hand, in the above information distribution system,
For example, a document including a text object and an image object, text, and information of a slide in which a plurality of types of image objects such as a photographic image and an illustration image are pasted on the slide may be distributed. And when delivering these information to remote terminals,
In association with the switching of the image object or the display slide in the information at the delivery source, the image object or the display slide needs to be instantaneously switched (also called synchronization matching) on the screen of each terminal.

[0004]

However, since the image object and the slide image have a large amount of data, it may take a long time until the terminal side receives all the switched information. In this case, for example, the slides referenced by the instructor and the slides referenced by the learners will be out of sync (referred to as synchronization inconsistency). For example, the number of pixels of one image taken by a digital camera having a resolution of 3 million pixels is 204
It is about 8 × 1536, and the capacity required for storing this one image is about 72 megabytes for a full-color image (24-bit image) that is not compressed. When such a high-resolution image is pasted on a document or a slide, the amount of data of the image to be delivered becomes very large. When distributing resolution images,
The problem of synchronization inconsistency becomes noticeable.

As a method of solving this problem, for example, for display on the client side terminal, a file obtained by converting a high-resolution drawing or photograph into a low-resolution image may be distributed to the client side terminal. In this case, for example, a 10-megabyte file can be made as compact as several hundred kilobytes. However, with this method, once converted to a low-resolution image, the client cannot access the original high-resolution image, and high-quality printing and re-editing of image objects cannot be performed. Access performance is reduced.

The present invention has been made in view of the above circumstances, and can achieve synchronization of display synchronization.
Information distribution method and system that does not deteriorate the access performance to the original information on the client side, such as high-quality printing and reediting, a distribution source terminal, a client terminal, and a server device used in this method or system , And a program and a computer-readable storage medium storing the program.

[0007]

That is, an information distribution method according to the present invention distributes information to a client terminal, and an original object included in original information composed of individual objects. Alternatively, an intermediate object that has a larger amount of data than the compressed object obtained by compressing the amount of data of the original object and a smaller amount of data than the original object is stored as a source object in association with the compressed object and requested from the client terminal. Upon receipt, the stored source object is delivered to the client terminal.

In the information distribution method according to the present invention, the display information indicating the image displayed on the client terminal side is selected from the replacement information having a smaller data amount than the original information including the compressed object, and the client terminal is selected. Delivered to.

An information distribution system according to the present invention is for distributing information to a client terminal, and is an object for compressing a data amount of at least one object included in original information composed of individual objects. A compression unit, an information compression unit that uses the compressed object that is an object compressed by the object compression unit to generate replacement information that has a smaller amount of data than the original information, and a compressed object that is compressed by the object compression unit For, regarding the intermediate object that has a larger amount of data than the original object or the compressed object included in the original information and a smaller amount of data than the original object as the source object, it is predetermined in association with the compressed object. Source object storage unit to store in a separate storage medium , A distribution control unit that selects display information indicating an image displayed on the client terminal side from the replacement information generated by the information compression unit and distributes the display information to the client terminal; A display information output unit that selects and outputs display information from the inside, a determination unit that determines whether or not to use the original information, and a display information that is displayed using the display information output from the display information output unit And an information output unit that performs output processing using the information including the source object stored in the source object storage unit when the determination unit indicates that it is preferable to output and use the original information. .

Further, the distribution source terminal, the client terminal, and the server device according to the present invention are suitable for realizing the above information distribution method and information distribution system. Furthermore, the program according to the present invention and the computer-readable storage medium storing the program are suitable for realizing the above information distribution method and information distribution system by software using a computer (electronic computer). .

[0011]

In the information distribution method and system having the above structure, the object compression unit first compresses the data amount of the object included in the original information to generate the compressed object, and the information compression unit converts the compressed object. Use to generate replacement information. Further, the display information output unit selects display information from the replacement information generated by the information compression unit and delivers it to the client terminal. In parallel with this, the source object storage unit stores the original object or the intermediate object as the source object for the compressed object. The information output unit on the client terminal side displays and outputs using the display information output from the display information output unit, and when the determination unit indicates that it is preferable to use the original information, the source object storage unit. Process the output using the information containing the source object stored in.

As a result, for example, the following uses can be made. First, an object with a large amount of data such as a high resolution image is automatically converted into a compressed object with a small amount of data such as a low resolution image, and the original high resolution image or the like is associated with the compressed object to store the original object storage unit. The replacement information containing a compressed object and having a small amount of data is used during normal information distribution. Then, when the original information is needed, the substantially original information can be used by referring to the original high-resolution image stored in the source object storage unit. More specifically, while delivering the display information selected from the replacement information having a small file size to the client terminal,
The original high-resolution image can be read from the source object storage unit and delivered to the client terminal only when there is a request on the client terminal side for printing or editing a drawing.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an arrangement of differences between respective embodiments of an information distribution method and an information distribution system according to the present invention which will be described later, in which replacement information having a smaller data amount than the original information is generated. 2 is a diagram summarizing the relationship between the location where data compression is performed, the location where data decompression is performed to generate source information having a larger amount of data than the replacement information, and the object registered in the database. As shown in the figure, either the distribution source terminal that generates the information or the server device can perform data compression, and either the source information or the source object can be registered in the database,
Either the client terminal or the server device can execute data expansion. Although not shown, either the distribution source terminal or the server device can generate intermediate information or an intermediate object.

A specific example in which the server device executes data compression and registers the source information in the database (in this case, data decompression is unnecessary) is the first embodiment described later or a modification thereof. In addition, a specific example in which the distribution source terminal executes data compression, the source object is individually registered in the database only for the compression target object and not the entire information, and the client terminal executes data decompression will be described later in second and third embodiments. It is a form or a modification thereof. Further, a specific example in which the server device executes data compression, each source object is registered in the database, and the client terminal executes data decompression is the fourth embodiment described later, and the distribution source terminal executes data compression. However, a specific example in which the entire source information is registered in the database (in this case, data expansion is unnecessary) is the fifth embodiment described later. Furthermore, a specific example in which the server device executes data compression and data decompression and individually registers the source object only in the object to be compressed in the database,
A sixth embodiment to be described later is a specific example in which the distribution source terminal executes data compression, the source object is individually registered in the database only for the compression target object, and the server device executes data decompression. It is an embodiment.

In the illustrated embodiment, the intermediate information and the intermediate object are generated at the place where the data compression is performed, but the intermediate information and the intermediate object are generated by either the distribution source terminal or the server device. It is possible to realize another configuration mode depending on whether or not to do so.

FIG. 2 shows the first information distribution system of the present invention.
It is a block diagram showing an embodiment. The information distribution system 1 according to the first embodiment includes a distribution source terminal 30, which is a terminal that generates information such as a personal computer and a word processor.
Data having a client terminal 50 which is a terminal (a terminal dedicated to output processing) for reproducing and displaying or printing the information received from the distribution source terminal 30 and a server device 70 for distributing all or a part of the information Center DC
It is network-connected by a communication network such as the Internet 9 or a LAN which is an example of a public communication network. The number of client terminals 50 is not limited to one, and a large number may be connected. This information distribution system 1 is, for example, for information such as seminars and lesson contents held in a specific place, from the information distribution source terminal 30 via the Internet 9 on the side of the trainees in the remote places. It can be used as a system for real-time delivery (simultaneous delivery) to client terminals.

In the first embodiment, the information of the original document created by the distribution source terminal 30 is uploaded to the data center DC and the entire information is registered in the database 80 in advance, and the server device 70 in the data center DC is used. This is a mode in which the data amount of information is compressed to generate replacement information, and the client terminal 50 receives information distribution via the server device 70 in real time. Therefore, the distribution source terminal 30 of the first embodiment first switches the display generation unit 32 that generates the document information and the content of the information generated by the information generation unit 32 to the display switching unit. 33 and an information output unit 34 that outputs information. The information output unit 34, based on the switching instruction of the display switching unit 33 and the original information generated by the information generation unit 32,
Information output processing is performed, such as outputting a document image to a display 46 such as a CRT or LCD (liquid crystal), and further transmitting information in real time to the client terminal 50 via the Internet 9. In association with the display switching in the distribution source terminal 30, the display switching unit 3 is configured so that the same information content is displayed on the screen on the client terminal 50 side.
3 also transmits the display switching signal to the server device 70.

The server device 70 of the first embodiment has a source information receiving section 72 for receiving the original information (document information) transmitted from the distribution source terminal 30 as source information, and a source information receiving section 72.
Of the objects (original objects in this example) included in the source information (original information in this example) received by the object whose data amount is larger than a predetermined value (hereinafter referred to as compression target object) And an object compression unit 74 that compresses the amount of data. Further, the server device 70 generates the information (replacement information) in which the object to be compressed included in the source information is replaced with the compressed object whose data amount is compressed by the object compression unit 74 (replacement information). And a display information output unit 78 that outputs replacement information having a small amount of data generated by the object replacement unit 76.
With. The object replacement unit 76 functions as an information compression unit that uses the compressed object that is the object compressed by the object compression unit 74 to generate replacement information having a smaller data amount than the original information.

Further, the server device 70 interlocks with the display switching in the distribution source terminal 30 so that the same information is displayed on the screen of the client terminal 50 side as well.
The display switching signal transmitted from 0 should be received, and based on the received display switching signal, that is, based on the instruction of the display switching unit 33, it should be transmitted to the client terminal 50 from the replacement information generated by the object replacing unit 76. A transmission content switching unit 77 that causes the display information output unit 78 to select content, that is, display information, is provided. This transmission content switching unit 77
Is an object replacement unit 76 that functions as an information compression unit.
From the replacement information generated by the client terminal 5
It functions as a distribution control unit that causes display information indicating an image displayed on the 0 side to be selected and distributed to the client terminal 50.

Further, the server device 70, for all objects, information including a pre-compression object (that is, a compression target object) which is an object before the data amount is compressed by the object compression unit 74, or data which is more than the compression target object. A database 8 for storing, as source information, intermediate information including an intermediate object having a small amount and a larger data amount than the compressed object as a source information in a predetermined storage medium (predetermined storage medium).
0, and a source information output unit 82 that reads out and outputs the source information stored in the database 80 in response to a request from the distribution source terminal 30 or the client terminal 50. The database 80 associates the compressed object compressed by the object compression unit 74 with the original object included in the original information or an intermediate object substantially equivalent to the original object as a source object and the compressed object. And functions as a source object storage unit to be stored in a predetermined storage medium.

The server device 70, if necessary,
As indicated by the dotted line in the figure, the uncompressed object in the source information received by the source information receiving unit 72 has a larger data amount than the compressed object compressed by the object compressing unit 74 and a larger data amount than the uncompressed object. Intermediate compression unit 90 for compressing the amount of data so that
By using the intermediate object compressed by the intermediate compression unit 90 or the source information received by the source information receiving unit 72, the intermediate information having a larger data amount than the replacement information and a smaller data amount than the original information is generated. An intermediate information generation unit 92 that generates the intermediate information and stores it in the database 80 as source information may be provided between the source information receiving unit 72 and the database 80.

The object replacing section 76 and the intermediate information generating section 92 change the format of the original document information to "Internet Explorer" which is an example of a Web browser.
The original document information is IFrame using the format called "IFFrame" used in (registered trademark).
Convert data to format. For example, one page of the original document is assigned as one slide, and one slide is converted into one IFrame format data. This IFra
According to the me format, the text can be pasted on the data in the IFrame format without reducing the amount of information, so that the character data can be copied and pasted from the distributed information and taken out.

The server device 70 is the Internet 9
It may be a Web server constructed above, or may not necessarily be arranged in the data center DC.
Alternatively, only the database 80 is used by an arbitrary Web server on the Internet 9, and the object replacement unit 7
Other parts such as 6 may be arranged in the data center DC.

The client terminal 50 of the first embodiment is
A display information receiving unit 56 that receives replacement information from the server device 70 and an information output unit 54 that outputs information is provided. Further, the client terminal 50 includes a determination unit 58 that determines which of the replacement information and the original information is preferably used, and a source information reception unit 59 that receives the source information from the server device 70.

The information output unit 54 selectively uses the information to be used based on the determination result of the determination unit 58, and based on the replacement information received by the display information receiving unit 56 and the source information received by the source information receiving unit 59. , CRT and LCD (liquid crystal)
For example, a document image is output to the display 66, or a printer 67 prints out on a paper medium 68 to output information.

Note that the display information may be distributed from the distribution source terminal 30 to the client terminal 50 as in the second embodiment described later. In this case, the server device 70
Includes a replacement information output unit that outputs the replacement information generated by the object replacement unit 76 to the distribution source terminal 30, and the distribution source terminal 30 includes a replacement information reception unit that receives the replacement information from the server device 70. . In this case, the display switching unit 33 functions as a distribution control unit that selects display information from the replacement information received by the replacement information receiving unit and distributes it to the client terminal, and the information output unit 34 functions as a distribution control unit. It functions as a display information output unit that selects display information from the replacement information received by the replacement information receiving unit based on an instruction from the functioning display switching unit 33 and distributes it to the client terminal 50.

FIG. 3 is a flowchart showing a processing procedure in the information distribution system 1 of the first embodiment. An information creator such as a seminar lecturer creates original information including an object having a large amount of data by the information generating unit 32 (S300). For example, as application software for generating a document, PowerPoint (registered trademark) capable of pasting a plurality of drawing objects such as a photo image and an illustration image in addition to text on a slide is used. Then, a high resolution image (a large amount of data) taken by a digital camera is pasted on a slide of a document to generate original document information. In the process of generating the original document information, the information output unit 34 outputs the document image to the display 46 such as a CRT or LCD (liquid crystal) based on the original document information generated by the information generating unit 32. The information creator checks the document image displayed on the display 46 and, if necessary, re-edits the object pasted on the slide to complete the original information.

Upon detecting that the original information is completed, the information output section 34 uploads the original information in the PowerPoint format to the server device 70 of the data center DC (file transfer or file copy) via the Internet 9. Then, the original information is registered in the database 80 as source information (S302). Note that the information creator may positively instruct the information output unit 34 to upload the original information.

In the data center DC, the source information receiving section 72 receives the information uploaded from the distribution source terminal 30. Then, the database 80 displays, for example, “MM5” for the uploaded PowerPoint format information.
A unique source ID for identifying the original information, such as 5542s ”, is assigned and the entire original information is stored as source information in association with the source ID (S700). That is, the database 80 is included in the original information. The original information itself, including the original object itself, is stored as the source information for all the stored objects.

The object replacing unit 76 duplicates the source information received by the source information receiving unit 72 and assigns a page identifier NO (for example, 4 pages) for identifying the page number of the document, and includes the source ID and the page identifier NO. The copy ID is embedded in the copied copy information (S702). At this time, the object replacement unit 76 displays, for example, "http
p: // datacenter. company. c
o. jp / access. cgi? DocumentI
URL (Uniform Resource) indicating the address and the page number indicating the storage location of the source information in the database 80, such as D = MM55542s & PageID = 4 ″ ″.
It is preferable to assign a duplicate ID including Locators). It should be noted that the object replacement unit 76 is the data center D.
The source information registered in the database 80 in C is encrypted,
A key for decrypting this may also be embedded in the copy information.

Next, the object compressing section 74 determines whether or not there is an object whose data amount is larger than a predetermined value among the objects included in the source information received by the source information receiving section 72. Yes (S704). Then, the object compression unit 74 sets an object having a data amount larger than a predetermined value as a compression target object and compresses the data amount to generate a compressed object (S706). For example, the object compression unit 74
For example, when a high-resolution image of about 300 dpi or more (the amount of data is larger than a predetermined amount) is detected in the copy information, it is automatically converted into a low-resolution image of about 72 dpi (resolution conversion), thereby compressing. A high-resolution image, which is an example of a target object, is generated as a low-resolution image, which is an example of a compressed object with a smaller amount of data. Note that when the images are pasted in an overlapping manner, it is not necessary to hold the data on the slide for the portion hidden by the overlapping, so the object compression unit 7
4 may delete this hidden portion from the converted low resolution image. Thereby, the file size of the replacement information can be further reduced.

Next, the object replacing unit 76 replaces the compression target object included in the copy information obtained by copying the source information with the compressed object whose data amount has been compressed by the object compressing unit 74, whereby the source information Generates information (replacement information) having a smaller amount of data than S (S
708). At this time, the object replacement unit 76 converts the format of the original document information into the IFrame format. That is, the object replacement unit 76 pastes the text onto the IFrame without reducing the amount of information, and pastes the image onto the IFrame after reducing the resolution to the screen display image quality.
A Frame component is automatically generated as replacement information.

At this time, the object replacement unit 76
Keeps the duplicate ID embedded in the duplicate information embedded in the replacement information. That is, the object replacement unit 76 embeds in the replacement information the address information indicating the storage destination of the original information including the original object (source object) corresponding to the compressed object compressed by the object compression unit 74. Then, the transmission content switching unit 77 receives the display switching signal transmitted from the distribution source terminal 30 (S304), and the display information output unit 78, based on the display switching signal received by the transmission content switching unit 77, the object replacement unit. From the replacement information (IFframe format) after resolution conversion generated by the client terminal 5, the client terminal 5
Select the display information to be sent to 0 and select the selected IFrame
The display information in the e format is transmitted to the client terminal 50 via the Internet 9 (S710). Address information indicating the storage destination of the original information is left embedded in the display information.

In the client terminal 50, the display information receiving section 56 receives (receives) the display information from the server device 70 (S504). As a result, information viewers on the client terminal 50 side (clients such as students)
Can output a document image to the display 66 based on the display information distributed from the distribution source terminal 30 via the server device 70.

Here, the low resolution image generated by the object compression unit 74 of the data center DC has the same apparent display size and the same behavior as the object as compared with the original high resolution image, and the resolution (or color). Only the gradation is reduced. For example, when an animation operation is set for the high resolution image in the slide, the animation operation is inherited as it is for the converted low resolution image. In addition, the data center D
Since the replacement information subjected to the resolution conversion in C does not include high-resolution image data, the amount of data in the replacement information in the IFrame format is small, and even distribution via the Internet 9 takes less time. Therefore, when the instructor on the side of the delivery source terminal 30 switches the image object or the display slide in the document, the image object or the display slide is instantaneously displayed on the display 66 on the client terminal 50 side in conjunction with this. Switch. That is, according to the information distribution system 1 of the first embodiment,
Each client terminal 50 can receive the switched information in real time in conjunction with the display switching on the distribution source terminal 30 side. In other words, the display content at the distribution source and the display content at each client side can be synchronized with each other. Further, regarding text, since the text data uploaded by the document creator is delivered as is in the IFrame format, the student on the client terminal 50 side copies and copies the character data from the display information delivered via the server device 70. It can be pasted out.

On the other hand, on the client terminal 50 side,
For example, in the case of printing out with the printer 67 using application software for information creation or when performing editing work, if processing is performed based on display information (that is, replacement information), inconvenience due to insufficient resolution occurs.
Therefore, in these cases, by referring to the duplicate ID embedded in the display information and acquiring the source information, which is the original information, from the data center DC, a high-resolution original image can be handled. If necessary, on the client terminal 50 side, the determination unit 58,
An installation program for installing a patch file (program) for causing a computer to function as the source information receiving unit 59 and the information output unit 54 into the client terminal 50 is provided with display information by using a method such as a self-extracting format. It is better to attach it and distribute it.

For example, in the client terminal 50, the determination unit 58 determines the source information (that is, the original information) according to the access content at the time of information distribution using the display information.
Then, it is determined which of the display information (that is, the replacement information) is preferably used (S506). That is, it is determined which of the pre-compressed object and the compressed object is preferably used to process the information. In the present embodiment, the determination unit 58 determines that it is preferable to use the display information including the compressed object when the display state may remain (S506-N).
O), it is determined that it is preferable to use the source information including the object before compression when there is a print or edit access (S506-YES). For example, the determination unit 58
When the document image only needs to be displayed on the display 66, the display information already received is continued to be used as it is (S508), while the resolution-converted image object (compressed object) on the slide is in the edit mode. If it is detected that there is a print command or a print command, the source information receiving unit 59 and the information output unit 54 are informed that it is preferable to use the source information.

When the determination unit 58 determines that the source information is preferably used (S506-Y).
ES), the data center DC is automatically accessed based on the copy ID embedded in the display information, and the distribution of the source information corresponding to the display information is requested (S510). For example, in the above example, the URL address "http: //datacenter.comp" in the copy ID is used.
any. co. jp / access. cgi? Docu
mentID = MM55542s & PageID = 4 ”
To access.

The source information output unit 82 of the data center DC is
When you receive this access, the Document in the URL
Source ID “MM555 that identifies the source information indicated by tID
42 s ″, source information (original information) corresponding to the display information received at the client terminal 50 is read from the database 80. And the URL
Corresponding page indicated by PageID in (1 slide)
Is specified, only the specified slide is converted into the IFrame format, and is transmitted to the client terminal 50 (S71).
2). Since the IFrame format data generated here includes high-quality images, it takes time to download, but high-definition printing is possible. In addition,
The printer driver may identify the existence of the information ID and automatically access the data center, automatically acquire the IFrame including the high-quality image from the data center, and print with high definition. .

Source information receiving section 59 of client terminal 50
Receives (receives) the source information distributed from the source information output unit 82 of the data center DC (S512). Based on the source information received by the source information receiving unit 59, the information output unit 54 performs an output process such as outputting a document image on the display 66 or printing out on a paper medium 68 by the printer 67 (S514). As a result, the client terminal 5
The information viewer on the 0 side can use the source information received by the source information receiving section 59 to perform editing work using a high-resolution image or obtain a high-resolution printed matter.

The respective units such as the display information receiving unit 56, the judging unit 58, and the source information receiving unit 59 in the client terminal 50 are incorporated as software into application software for information creation and a printer driver for a printer. It may be one. For example, when it is detected that the resolution-converted image object on the slide has entered the edit mode, the application (PowerPoint) automatically identifies the existence of the duplicate ID and automatically accesses the data center DC to The original information is acquired from the center DC so that it can be edited.
When printing information, the printer driver identifies the presence of the duplicate ID and automatically accesses the data center DC, automatically obtains the original information from the data center DC, and prints with high definition. You may do it.

It should be noted that the determination unit 5 is provided in the client terminal 50.
8 or the source information receiving unit 59 is not prepared as hardware (circuit, etc.), or an old version of application software or printer driver is installed. Considered to be many. In this case, for example, when the self-extracting installation program is distributed in association with the display information, the following processing is performed.

First, when information distribution via the server device 70 is started between the distribution source terminal 30 and the client terminal 50, the client terminal 50 self-extracts attached to the display information distributed from the server device 70. Unzip the format installation program. The client terminal 50 acquires a patch file for causing the computer to function as the determination unit 58 based on this installation program, and installs it in the client terminal 50. The patch file is, for example, the server device 7
It may be provided from scratch or may be attached to the installation program itself. In the former case, the client terminal 50 accesses the server device 70 and downloads (acquires) the patch file in the processing procedure according to the installation program. On the other hand, in the latter case, the client terminal 50 automatically acquires the patch file when the installation program is decompressed. As a result, the application software or printer driver of the old version is upgraded by the patch file, and the computer can function as the determination unit 58, the source information receiving unit 59, and the information output unit 54, and functions as a software. By using the source information received by the source information receiving unit 59, it is possible to perform editing work using a high resolution image or obtain a high resolution printed material.

In the above description, the object before compression (that is, the object to be compressed) which is the original object before the data amount is compressed by the object compression unit 74.
Although the object itself was treated as the source object, other objects can be treated as the source object. For example, as indicated by the dotted line in FIG. 2, the server device 70 generates an intermediate information file using an intermediate compression unit 90 that compresses the compression target object into an intermediate object, and the intermediate object compressed by this intermediate compression unit 90. The intermediate information generating unit 92 may be provided between the source information receiving unit 72 and the database 80. According to the configuration of this modification, by handling the intermediate object as the source object and storing the intermediate information file generated by using the intermediate object in the database 80 as the source information, the server device 70 and the distribution source terminal 30 or The handling property of the source information with the client terminal 50 is improved as compared with the configuration without the intermediate compression unit 90 and the intermediate information generation unit 92.

In the above description, the determination unit 58 detects that it is preferable to use the source information including the pre-compression object such as access for printing or editing, and automatically accesses the data center DC. Not limited to this, for example, the determination unit 58 detects that the information creator has explicitly instructed to acquire the original information and replace it with the duplicate information (that is, it is preferable to use the source information), The data center DC may be accessed. In this case, the shape of the information icon indicating the replacement information is provided so that the viewer can easily understand that the object with a large amount of data (for example, a high-resolution image) is replaced with the object with a small amount of data (for example, a low-resolution image). It is preferable to devise a display method such as changing the color or the color, or changing the color of the outer frame of the image object.

As described above, according to the information delivery system 1 of the first embodiment, the delivery source terminal 30 and the client are used by using the display information (ie, the replacement information) whose data size is compressed to make the file size compact. Terminal 50
It is possible to synchronize the display contents in and, and by using the source information downloaded from the data center DC, high-quality printing and re-editing can be performed on the client terminal 50 side. That is, according to the information delivery system 1 of the first embodiment, it is possible to achieve both the synchronization of display synchronization and the high-quality printing or re-editing using information that is substantially the same as the original information. .

Further, since the address information indicating the storage location of the source information is embedded in the display information (that is, the replacement information) as the correspondence information for associating the compressed object with the source information, the correspondence between the compressed object and the source information is obtained. Managing relationships becomes easier.

Further, when the information is completed in the distribution source terminal 30, the file size is automatically converted into the replacement information in which the file size is made compact, and the original object or the object is displayed during the display using the display information on the client terminal side. When there is an access that requires a document, the original information is automatically downloaded from the data center DC, which bothers the information viewer and informs the information viewer that the above-described processing is performed. You don't have to be aware of it. Further, since the server device 70 compresses the data, it is not necessary for the distribution source terminal 30 to own the hardware configuration or software for data compression.

FIG. 4 shows the second information distribution system of the present invention.
It is a block diagram showing an embodiment. In the second embodiment, the distribution source terminal 30 compresses the data amount of information, and not only the entire information but only the original object corresponding to the compressed object among the individual objects in the original information as the source object. As data center D
In this mode, the data amount of information is expanded in each of the terminals 30 and 50 on the generation side or the reproduction side while being registered in C.

Therefore, first, the distribution source terminal 30 of the second embodiment is provided with the information generation unit 32, the display switching unit 33, and the information output unit 34, as in the first embodiment.
Of the original objects included in the original information generated by the information generating unit 32, the original object corresponding to the object (compression target object) whose data amount is larger than a predetermined value is used as the source object. A source object registration unit 40 that is registered in the device 70, and an object compression unit 42 that compresses the data amount of the compression target object are provided. Also, the distribution source terminal 30
Includes an object replacement unit 45 that generates information (replacement information) in which a compression target object included in the original information is replaced with a compressed object that is an object whose data amount is compressed by the object compression unit 42.

The object replacement unit 45 functions as an information expansion unit for generating source information having a larger amount of data than the replacement information and a smaller amount of data than the original information. The display switching unit 33 also functions as a distribution control unit that selects display information from the replacement information and distributes it to the client terminal.
The information output unit 34 serves as a display information output unit that selects display information from the replacement information generated by the object replacement unit 45 based on an instruction from the display switching unit 33 that functions as a distribution control unit and distributes it to the client terminal 50. Function.

The distribution source terminal 30 may, if necessary,
As indicated by the dotted line in the figure, the data amount of the pre-compression object in the original information generated by the information generation unit 32 is larger than that of the compressed object compressed by the object compression unit 42 and is larger than that of the pre-compression object. Intermediate compression unit 94 for compressing the amount of data so that
May be provided between the information generation unit 32 and the source object registration unit 40.

The server device 70 of the second embodiment stores the source object receiving section 84 that receives the source object from the distribution source terminal 30 and the source object received by the source object receiving section 84 in a predetermined storage medium. A source object output unit 86 that reads out and outputs a source object stored in the database 80 in response to a request from the database 80 and the client terminal 50.
With. That is, the database 80 functions as a source object storage unit that stores the source object corresponding to the compressed object without storing the entire information including the source object.

As in the first embodiment, the server device 70 sends the replacement information to the client terminal 50 via the server device 70 from the distribution source terminal 30 as shown by the dotted line in the figure. An information transmitting / receiving unit 73 that receives and stores replacement information or outputs the stored information, and a display switching unit 33 that receives a display switching signal transmitted from the distribution source terminal 30 and that is indicated by the received display switching signal. Of the replacement information received and stored by the information transmitting / receiving unit 73 based on the instruction of the client terminal 5
It may be configured to include a transmission content switching unit 77 that causes the replacement information transmission / reception unit to select the content to be transmitted to 0. In this case, the information output unit 34 of the distribution source terminal 30 converts the replacement information into the IFrame format and registers the replacement information in the IFrame format in the data center DC in advance. In addition, the display switching unit 33 of the distribution source terminal 30 sends a display switching signal to the server device 70 so that the same information content is displayed on the screen of the client terminal 50 in conjunction with the display switching in the distribution source terminal 30. Send. Then, the information transmitting / receiving unit 73 receives the IFra received by the information transmitting / receiving unit 73 based on the display switching signal received by the transmission content switching unit 77.
The display information to be transmitted to the client terminal 50 is selected from the replacement information in the me format, and the selected display information is transmitted to the client terminal 50 via the Internet 9. That is, the information transmitting / receiving unit 73 selects display information from the replacement information received from the distribution source terminal 30 by itself based on the instruction of the transmission content switching unit 77 functioning as a distribution control unit, and distributes it to the client terminal 50. Functions as a display information output unit.

The client terminal 50 of the second embodiment is
Similar to the first embodiment, the display information receiving unit 56, the information output unit 54, and the determination unit 58 are provided, and the source object receiving unit 64 that receives the source object from the server device 70 and the compression included in the replacement information are included. An object replacement unit 65 for generating source information, which is information obtained by replacing the completed object with the source object received by the source object receiving unit 64. Object replacement unit 65
Functions as an information decompression unit that generates source information that has a larger amount of data than the replacement information and a smaller amount of data than the original information. When the determination unit 58 indicates that it is preferable to use the original information, the information output unit 54 outputs the information using the source information generated by the object replacement unit 55 that functions as the information decompression unit. To process.

FIG. 5 is a flow chart showing a processing procedure in the information distribution system 1 of the second embodiment. The information creator on the side of the distribution source terminal 30 creates information including an object with a large amount of data by the information generating unit 32, as in the first embodiment (S320). When the source object registration unit 40 detects that the original information is completed, the source object registration unit 40 automatically starts the conversion processing application. In addition,
The source object registration unit 40 activates the conversion processing application on condition that the information creator drag and drop the information to the conversion processing execution icon placed on the desktop displayed on the display 46 is detected. You may do it. When the source object registration unit 40 starts the conversion processing application,
The information is assigned a unique source ID to identify the original information, such as "MM55542s", and establishes communication with the data center DC. Instead of assigning the source ID by the source object registration unit 40, after the communication between the distribution source terminal 30 and the data center DC is established, the database 8 of the data center DC is set.
Assign a source ID for source information at 0, and
You may notify D to the delivery source terminal 30.

Next, the source object registration unit 40 uses the started conversion processing application to determine whether or not there is an object whose data amount is larger than a predetermined value among the objects included in the original information. It is determined (S322). Then, the source object registration unit 40 sets an object whose data amount is larger than a predetermined value as a compression target object, and assigns an identifier NO (for example, 324 or the like) for identifying this object. The object compression unit 42 (intermediate compression unit 94) confirms that the detected object is the compression target object.
If it has, the intermediate compression unit 94 is also notified). Further, the source object registration unit 40 uploads (file transfer or file copy) the source object, which is the object to be compressed, in association with the source ID and the identifier NO, to the server device 70 of the data center DC.
The source object is registered in the database 80 (S32)
2-YES, S324). The source object registration unit 40 may encrypt the source object registered in the database 80 in the data center DC, embed a key for decrypting the source object in the replacement information, and then register the replacement object.

In the data center DC, the source object receiving section 84 receives the source object uploaded from the distribution source terminal 30. And database 8
0 stores the uploaded source object in association with the source ID and the identifier NO (S720).

Next, the object compressing section 42 compresses the data amount of the object to be compressed, such as changing the high resolution image to the low resolution image, to generate the compressed object, as in the object compressing section 74 of the first embodiment. Yes (S3
26). At this time, if the images are pasted in an overlapping manner, the area hidden by the overlapping may be deleted from the converted image.

Next, the object replacing section 45 compresses the data amount of the source object, which is the object to be compressed, included in the source information, by the object compressing section 42, similarly to the object replacing section 76 of the first embodiment. By replacing the compressed object with the compressed object, the replacement information in the IFrame format, which includes the image object converted into the low resolution image and has a smaller data amount than the source information, is generated (S328). At this time, the object replacement unit 4
5 assigns a duplicate ID including the source ID and the identifier NO, and embeds this duplicate ID in the generated replacement information. For example, the object replacement unit 45 uses the “httpP: / d
atacenter. company. co. jP / a
ccess. cgi? DocumentID = MM55
It is preferable to assign a duplicate ID including a URL indicating the storage destination of the source object in the database 80, such as 542s & CompponentID = 324 ″.

Next, the distribution source terminal 30 distributes the replacement information generated by the object replacement unit 45 to the client terminal 50. At this time, in association with the display switching on the distribution source terminal 30, the object replacing unit 4 is configured so that the same information content is displayed on the screen on the client terminal 50 side.
The display switching unit 33 displays the display information to be transmitted to the client terminal 50 from the resolution-converted replacement information generated by the display device 5.
Select the display information based on the
The frame format is transmitted to the client terminal 50 via the Internet 9 (S330). It should be noted that the copy ID is left embedded in the display information.

In the client terminal 50, the display information receiving section 56 receives (receives) the display information from the distribution source terminal 30 (S528). As a result, information viewers on the client terminal 50 side (clients such as students)
Directly from the distribution source terminal 30 or the server device 70.
Display 66 based on the information delivered via
Can output a document image.

Here, as in the first embodiment, the behavior of the low resolution image converted by the object compression unit 42 as an object is the same as that of the original high resolution image, and the replacement information generated by the object replacement unit 45 is used. The file size of is very small. Therefore, when the instructor on the distribution source terminal 30 side switches the image object or the display slide in the document, the image object or the display slide is instantaneously displayed on the display 66 on the client terminal 50 side in conjunction with this. It is possible to enjoy the same effects as those of the first embodiment, such as switching to.

On the other hand, on the client terminal 50 side,
When performing printout or editing work, if processing is performed based on the display information, similar to the first embodiment, inconvenience due to insufficient resolution occurs. Therefore, when performing printout or editing work, a high-resolution original image is obtained by referring to the duplicate ID embedded in the display information and acquiring the original object itself or a substantially equal intermediate object from the data center DC. Be able to handle.

For example, the determination unit 58 determines which of the original information and the display information is preferable to be used according to the access contents at the time of information distribution using the display information (S530). Specifically, as in the first embodiment, the determination unit 58 determines that it is preferable to use the display information including the compressed object when the display may be left as it is (S530-NO), and the print or edit is performed. When there is an access, it is determined that it is preferable to use the source information including the pre-compression object (the original information itself in this example) (S530-YES). Then, for example, the determination unit 58 continues to use the display information that has already been received as it is when the document image only needs to be displayed on the display 66 (S532), while the resolution-converted image object (compressed object) on the slide is used. )
When it detects that the edit mode has been entered or a print command has been issued, it notifies the source object receiving section 64 and the information output section 54 that it is preferable to use the source information.

When the determination unit 58 determines that it is preferable to use the source information, the source object receiving unit 54 determines (S5).
30-YES), the duplicate ID embedded in the display information
Based on the above, the data center DC is automatically accessed to request the distribution of the source object corresponding to the compressed object included in the display information (S534). For example, in the case of the above example, the URL address in the copy ID is "httpP: /datacenter.comp.
any. co. jP / access. cgi? Docu
mentID = MM55542s & Compponent
Access ID = 324 ".

Upon receiving this access, the source object output unit 86 of the data center DC receives the Doc in the URL.
source ID "M that identifies the source information indicated by
The source object corresponding to the compressed object included in the display information received at the client terminal 50 is retrieved from the database 80 based on the M55542s ”and the identifier NO“ 324 ”for identifying the source object indicated by the CompponentID. It is read and transmitted to the client terminal 50 (S722).

The source object receiving unit 64 receives the source object distributed from the source object output unit 86 of the data center DC (S536), and inputs the received source object to the object replacing unit 65. Upon receiving the source object from the source object receiving unit 64, the object replacing unit 65 replaces the compressed object included in the display information with the source object received by the source object receiving unit 64 to generate (decompress) the source information. Yes (S538). The information output unit 54 outputs a document image on the display 66 or prints it on the paper medium 68 by the printer 67 based on the source information restored by the object replacement unit 65 (S539). As a result, the information viewer on the client terminal 50 side can use the source information generated by the object replacement unit 65 to perform editing work using a high-resolution image or obtain a high-resolution printed matter. it can.

As in the first embodiment, it is not limited to handling the uncompressed object (that is, the object to be compressed) itself, which is the object before the data amount is compressed by the object compression unit 42, as the source object, and Object can be treated as a source object. For example, as indicated by the dotted line in FIG. 4, the distribution source terminal 30 has a configuration in which an intermediate compression unit 94 that compresses the compression target object into an intermediate object is provided between the information generation unit 32 and the source object registration unit 40. May be. According to the configuration of this modification, by handling the intermediate object as the source object and storing it in the database 80, the handleability of the source object between the distribution source terminal 30 or the client terminal 50 and the server device 70 is intermediately compressed. This is an improvement over the configuration without the portion 94.

Further, similarly to the first embodiment, the determining unit 58 detects that it is preferable to use the source information including the object before compression such as access for printing or editing, and automatically accesses the data center DC. Not limited to this, the determination unit 58 may detect that the information viewer has explicitly instructed to access the data center DC.

As described above, according to the information distribution system 1 of the second embodiment, as in the first embodiment, by using the display information in which the file size is made compact, the display synchronization is matched. It is possible to achieve both high-quality printing and re-editing using information that is substantially the same as the original information.

Further, since the address information indicating the storage destination of the source object is embedded in the display information as the correspondence information for associating the compressed object with the source object, the correspondence relationship between the compressed object and the source object is managed. Will be easier.

FIG. 6 shows a third information distribution system of the present invention.
It is a block diagram showing an embodiment. The third embodiment deals with information including moving image objects such as MPEG format video files, and the distribution source terminal 3
In 0, the amount of information data is compressed by converting a video clip of source information (an example of a moving object before compression) to a still image (an example of a compressed object), and not the entire original information including the video clip. , A video clip is converted into streaming video, and this streaming video is registered as a source object in the data center DC. Streaming video
It is a moving image object that has a larger data amount than a still image that is an example of a compressed object and a smaller data amount than a video clip that is an example of an object before compression (original object), and is an example of an intermediate object.

Here, the process of converting a video clip into a still image and the process of converting a video clip into a streaming video may be performed by either the server device 70 side or the distribution source terminal 30 side. The embodiment adopts a configuration in which the distribution source terminal 30 that generates replacement information generates streaming video.

Therefore, first, in addition to the configuration of the second embodiment, the distribution source terminal 30 of the third embodiment has an information generating unit 32.
An information generation unit, which is a streaming video generation unit (an example of an intermediate compression unit) 96 that converts a video clip in the source information generated by the stream clip into a streaming video having a smaller data amount than the video clip and a larger data amount than the still image. Three
2 is provided between the source object registration unit 40 and the source object registration unit 40.

Server device 70 and client terminal 5
0 has the same configuration as that of the second embodiment, except that streaming video is treated as a source object. In addition to converting a moving image into a still image or streaming video, the data amount of the image object may be further compressed by reducing the resolution of the image object as in the first or second embodiment.

Although not shown, the server device 70 transmits the replacement information to the client terminal 50 via the server device 70 in the same manner as in the second embodiment. It may be configured to include the switching unit 77. Then, in this case, the display switching unit 33 of the distribution source terminal 30 also transmits the display switching signal to the server device 70.

FIG. 7 is a flow chart showing the processing procedure in the information distribution system 1 of the third embodiment. The information creator creates information including a video clip having a large amount of data by the information generating unit 32, as in the second embodiment (S340). The source object registration unit 40 starts the conversion processing application automatically when it detects that the original information is completed or when it detects drag and drop of the information to the conversion processing execution icon.
After this, the source object registration unit 40
It assigns a unique source ID to identify source information, such as "MM55542s" and establishes communication with the data center DC. Instead of assigning the source ID by the source object registration unit 40, after the communication between the distribution source terminal 30 and the data center DC is established, the source ID for the source information is assigned in the database 80 of the data center DC, and this source ID is assigned. The ID may be notified to the distribution source terminal 30.

Next, the source object registration unit 40 uses the started conversion processing application to convert the information to MP
It is determined whether or not there is a video clip having a large amount of data such as an EG format video file (S342). When the source object registration unit 40 detects a video clip (S
342-YES), the identifier N for identifying this video clip with this video clip as the compression target object
Assign O (eg V3d4ws23). Then, it notifies the streaming video generation unit 96 and the object compression unit 42 that the video clip is the object to be compressed. Alternatively, an identifier NO may be assigned in the database 80 of the data center DC and this identifier NO may be notified to the distribution source terminal 30.

The streaming video generator 96 converts the video clip into, for example, "Windows (registered trademark) Advance".
d Streaming Format "and the like, and the converted streaming video is input to the source object registration unit 40 (S344). The source object registration unit 40 causes the server device 70 of the data center DC to compress. A streaming video corresponding to an object video clip is associated with a source ID and an identifier NO and uploaded (file transfer or file copy), and this streaming video is registered in the database 80 as a source object (S344).

In the data center DC, the source object receiving section 84 receives the streaming video uploaded from the distribution source terminal 30. Then, the database 80 stores the uploaded streaming video in association with the source ID and the identifier NO (S740).

Next, the object compression section 42 converts the video clip or streaming video into a still image,
The identifier NO is assigned to this still image and input to the object replacement unit 45 (S346). For example, an appropriate one still image field or still image frame may be automatically extracted from the streaming video to be a still image, or a still image may be processed and generated using three or more adjacent field images. Good. Object replacement unit 45
Replaces the video clip in the source information with the still image input from the object compressing unit 42, thereby replacing the information (replacement information) including the still image extracted from the video clip and having a smaller data amount than the source information. Generate (S34
8). At this time, it is preferable to change the color of the outer frame of the still image so that the viewer knows that a moving image corresponding to the still image exists. Further, the object replacement unit 45 assigns a copy ID including the source ID and the identifier NO, and embeds this copy ID in the generated replacement information. For example, the object replacement unit 45 uses "httpP: // datac
enter. company. co. jP / acces
s. cgi? DocumentID = MM55542s
& ComPonentID = V3d4ws23 "URL for accessing the data center DC, such as
It is preferable to assign a duplicate ID including the.

Next, the distribution source terminal 30 selects the display information to be transmitted to the client terminal 50 from the replacement information generated by the object replacement unit 45 based on the instruction of the display switching unit 33, and the selected display information is displayed. The information is transmitted to the client terminal 50 via the Internet 9 (S35).
0). For example, from the replacement information generated by the object replacement unit 45 so that the still image corresponding to the moving image is displayed on the screen of the client terminal 50 side in conjunction with the switching of the moving image on the distribution source terminal 30 side, The still image corresponding to the moving image is selected as the content to be transmitted to the client terminal 50, and the display information including the selected still image is transmitted.

In the client terminal 50, the display information receiving section 56 receives (receives) the display information from the distribution source terminal 30 (S548). The replacement information obtained by converting the video clip into a still image by the object replacement unit 45 is
Since the file size is very small because the video data is not included, if the display information is distributed from the distribution source terminal 30 to the client terminal 50 via the Internet 9, it becomes easy to synchronize the display synchronization. Therefore, when it is sufficient to display the document image on the display 66, the determination unit 58 on the client terminal 50 side continues to use the display information already received as it is (S550-NO, 552). Thus, the information viewer on the client terminal 50 side can cause the display 66 to output the document image based on the display information distributed from the distribution source terminal 30 via the server device 70. Further, when the moving image object is switched on the distribution source terminal 30 side, the still image is switched on the client terminal 50 side in conjunction with this.

On the other hand, in the client terminal 50, when the information viewer tries to reproduce the moving image by double-clicking the still image or the like (S550-YES), the determining unit 58 determines that the source object is the data center DC. The source object receiver 64 and the information output unit 5 indicate that it is preferable to use the registered streaming video.
Tell 4.

The source object receiving unit 64 receives the streaming video corresponding to the still image by accessing the database 80 in the data center DC by referring to the duplicate ID embedded in the still image, and stores it in the hard disk or the like. The received streaming video is immediately (with almost no waiting time) input to the information output unit 54 without being downloaded to the medium (S554, S556, S74).
2). The information output unit 54 reproduces and outputs the received streaming video on the display 66 (S55).
8). As a result, the information viewer on the client terminal 50 side can view the moving image by streaming video.

In the above description, not the video clip but the streaming video generated by the streaming video generation unit 96 is registered in the data center DC as the source object. However, for example, as a configuration without the streaming video generation unit 96, The original video clip itself may be registered in the data center DC. According to the configuration of this modification, it takes time to upload the original moving image corresponding to the still image, or a storage medium such as a hard disk for downloading and storing is required. Although the handling property of the video clip between the terminal 30 and the client terminal 50 is lower than that of the configuration including the streaming video generation unit 96, the video clip included in the source information can be reproduced on the client terminal 50 side. Will be able to.

As described above, according to the information distribution system 1 of the third embodiment, even if the original information includes a moving image object such as a video clip, the moving image object is converted into a still image and the file is converted into a file. By using the replacement information having a compact size, the still image on the client terminal 50 side can be switched in conjunction with the switching of the moving image object on the distribution source terminal 30 side, so that there is a difference between the moving image and the still image. As in the second embodiment, the display synchronization can be matched. On the other hand, when moving image reproduction is required, the streaming video or video clip downloaded from the data center DC can be reproduced. That is, according to the information delivery system 1 of the third embodiment, it is possible to achieve both the synchronization of the display synchronization and the reproduction of the moving image by using the original moving image object or the moving image object substantially equivalent thereto. it can.
For example, the slides to be used in the lecture are registered in advance on the web server, and while the lecturer's lecture video is being broadcast by streaming video technology, the terminal on the side of the student can slide the slide on the web server at the moment the lecturer switches the slides. By acquiring it, the display slides can be synchronized.

FIG. 8 shows the fourth information distribution system of the present invention.
It is a block diagram showing an embodiment. The fourth embodiment is an aspect in which the first embodiment and the second embodiment are combined, and the server device 70 compresses the data amount of information and compresses the individual objects in the original information. For the target object only, database 8 with the original object or intermediate object as the source object
This is a mode in which the data amount of information is expanded by using the source object acquired from the database 80 in the client terminal 50 by registering 0.

Therefore, the distribution source terminal 30 transmits the entire original information to the server device 70 via the information output unit 34. Although not shown, the source information registration unit 40A and the intermediate information generation unit 98 are provided to not only the original information itself but also the intermediate information generation unit 9 as in the fifth embodiment described later.
The intermediate information generated in 8 may be transmitted as the original information. In the server device 70, the source information receiving unit 72 receives the entire original information transmitted from the distribution source terminal 30,
Similar to the first embodiment, the object compression unit 74 compresses the data amount of the compression target object in the information to generate the compressed object. next,
The object replacement unit 76 replaces the compression target object included in the source information (copy information) with the compressed object compressed by the object compression unit 74 to generate replacement information. In parallel with this, the database 80
Stores the object to be compressed as the source object.

Then, the display information output unit 78 transmits to the client terminal 50 from the resolution-converted replacement information generated by the object replacement unit 76 based on the display switching signal received by the transmission content switching unit 77. The display information to be displayed is selected, and the selected display information is transmitted in the IFrame format via the Internet 9 to the client terminal 50.
Send to.

As a result, the viewer on the client terminal 50 side can browse the information based on the replacement information received from the server device 70 in conjunction with the switching of the display on the delivery source terminal 30 side. When it is preferable to use the original information such as printing or editing, the object replacement unit 65 replaces the compressed object in the replacement information with the source object read from the database 80 to generate the source information. Thereby, the information viewer can print or edit using the source information.

FIG. 9 shows the fifth information distribution system of the present invention.
It is a block diagram showing an embodiment. The fifth embodiment is another mode in which the first embodiment and the second embodiment are combined, and the distribution source terminal 30 compresses the data amount of information, and the entire original information or the entire intermediate information is In this mode, the source information is registered in the database 80.

Therefore, the distribution source terminal 30 transmits the entire original information or the intermediate information generated by the intermediate information generation unit 98 as the original information to the server device 70 via the source information registration unit 40A. The object compression unit 42 compresses the data amount of the compression target object in the information to generate a compressed object, as in the second embodiment. Next, the object replacement unit 45 replaces the compression target object included in the source information (copy information) with
Replacement information is generated by replacing the compressed object compressed by the object compression unit 42.

On the other hand, in the server device 70, the source information receiving section 72 receives the entire source information transmitted from the distribution source terminal 30, and the database 80 stores the source information.

Next, the distribution source terminal 30 distributes the replacement information generated by the object replacement unit 45 to the client terminal 50. At this time, in association with the display switching on the distribution source terminal 30, the object replacing unit 4 is configured so that the same information content is displayed on the screen on the client terminal 50 side.
5, the display information to be transmitted to the client terminal 50 is selected from the replacement information after the resolution conversion, and the selected display information is transmitted to the client terminal 50 via the Internet 9 in the IFrame format.

In the client terminal 50, the display information receiving section 56 receives the display information from the distribution source terminal 30. Thereby, the information viewer on the client terminal 50 side can browse the information based on the display information directly delivered from the delivery source terminal 30 in association with the switching of the display on the delivery source terminal 30 side. When it is preferable to use the original information such as printing or editing, the source information corresponding to the display information (or the compressed object in the display information) is read from the database 80. As a result, the information viewer on the client terminal 50 side can print or edit using the source information read from the database 80.

In the case of the fifth embodiment, as in the first embodiment, the client terminal 50 registers the source registered in the database 80 when the determination unit 58 indicates that it is preferable to use the original information. Since the information can be used, there is no need for a component for expanding the data amount of the information.

FIG. 10 is a block diagram showing a sixth embodiment of the information distribution system of the present invention. In the information distribution system 1 of the sixth embodiment, the server device 70 compresses the data amount of information, and only the compression target object among the individual objects in the original information is set as the source object or the intermediate object. This is a mode in which the source information is generated by registering in the database 80 and expanding the data amount of information in the server device 70.

Therefore, the distribution source terminal 30 transmits the entire original information to the server device 70 via the information output section 34. Although not shown, the source information registration unit 40A and the intermediate information generation unit 98 are provided as in the fifth embodiment.
Not only the original information itself, but the intermediate information generated by the intermediate information generating unit 98 may be transmitted as the original information.
In the server device 70, the source information receiving unit 72 receives the entire original information transmitted from the distribution source terminal 30, and the object compressing unit 74, like the first or fourth embodiment, compresses the information in the information. For an object, the amount of data is compressed to generate a compressed object.
Next, the object replacement unit 76 determines the source information (copy information).
The object to be compressed included in is replaced with the compressed object compressed by the object compressing unit 74 to generate the replacement information. The database 80 stores the compression target object as a source object.

Then, the display information output unit 78 selects from the replacement information generated by the object replacement unit 76 based on the display switching signal received by the transmission content switching unit 77.
Select the display information to be sent to the client terminal 50,
The selected display information is transmitted to the client terminal 50 via the Internet 9 in the IFrame format.

As a result, the viewer on the client terminal 50 side can browse the information based on the display information received from the server device 70 in conjunction with the switching of the display on the delivery source terminal 30 side. When it is preferable to use the original information such as printing or editing, the source information receiving unit 59 of the client terminal 50 transmits the source information corresponding to the compressed object in the replacement information to the server device 70.
To request. As a result, the information viewer on the client terminal 50 side can print or edit using the source information generated in the server device 70.

In the case of this sixth embodiment, the server device 70
Since both sides perform data compression and decompression, it is not necessary for the distribution source terminal 30 and the client terminal 50 to possess the hardware configuration and software for data compression and decompression.

FIG. 11 is a block diagram showing a seventh embodiment of the information distribution system of the present invention. In the information distribution system 1 of the seventh embodiment, the distribution source terminal 30 compresses the data amount of information, and only the compression target object among the individual objects in the original information is the original object or the intermediate object as the source object. Is registered in the database 80 as, and the server device 70 expands the data amount of information to generate source information.

Therefore, in the distribution source terminal 30, the object compression unit 42 compresses the data amount of the compression target object in the information to generate a compressed object, as in the second embodiment. Next, the object replacement unit 45 replaces the compression target object included in the source information (duplication information) with the compressed object compressed by the object compression unit 42 to generate replacement information. In parallel with this, the source object registration unit 4
0 transmits the object to be compressed in the original information or the intermediate object generated by the intermediate compression unit 94 to the server device 70 as the source object.

In the server device 70, the source object receiving section 84 receives the source object transmitted from the distribution source terminal 30, and the database 80 stores the source object.

Next, the distribution source terminal 30 distributes the replacement information generated by the object replacement unit 45 to the client terminal 50. At this time, in association with the display switching on the distribution source terminal 30, the object replacing unit 4 is configured so that the same information content is displayed on the screen on the client terminal 50 side.
5 from the replacement information generated by the client terminal 50
Display information to be transmitted to the client terminal 50 via the Internet 9 in the IFrame format.

In the client terminal 50, the display information receiving section 56 receives the display information from the distribution source terminal 30. Accordingly, the information viewer on the client terminal 50 side can browse the information based on the display information directly distributed from the distribution source terminal 30 in association with the switching of the display on the distribution source terminal 30 side.

On the other hand, when it is preferable to use the original information such as printing or editing, the source information receiving section 59 of the client terminal 50 accesses the server device 70 to display the display information (or the compressed object in the display information). ) Request to send source information.

In the server device 70, the object replacing section 76 reads the source object corresponding to the compressed object from the database 80. Then, the object replacement unit 76 replaces the compressed object in the display information with the source object read from the database 80 to generate the source information. The source information output unit 82 transmits this source information to the client terminal 50. This allows
The information viewer of the client terminal 50 is the server device 70.
It is possible to print or edit using the source information generated in.

In the case of the seventh embodiment, as in the sixth embodiment, the client terminal 50 is generated in the server device 70 when the determination section 58 indicates that it is preferable to use the original information. Since source information can be used, no component is needed to decompress the amount of information data.

FIG. 12 is a diagram showing an example of a hardware configuration when the distribution source terminal 30, the client terminal 50, and the server device 70 are configured by using the electronic computer (computer) 10. As shown in the figure, the computer 10 that realizes the server device 70 is a CPU
(Central Processing Unit) 902, ROM (ReadOn
ly Memory) 904, RAM (Random Access Memory) 9
06, memory reading unit 907, communication I / F (interface) 908, input device 91 such as keyboard and mouse
2. Hard disk device 914, FD (Flexible Disk)
) Drive 916, CD-ROM (Compact Disk RO
M) has a drive 918 and a display control unit 919.

The distribution source terminal 30, the client terminal 50, and the server device 70 which are constituted by the electronic computer 10.
Can be similar to the basic configuration and operation shown in FIG. 2, for example. A program that causes a computer to execute the above-described processing procedure is a CD-ROM 92.
It is distributed through recording media such as 2. Alternatively, the program is stored in the FD 920 instead of the CD-ROM 922.
May be stored in. In addition, MO drive is installed
The program may be stored in the memory, or the program may be stored in another recording medium such as a nonvolatile semiconductor memory card 924 such as a flash memory.
Further, the program may be downloaded from another server or the like via a communication network such as the Internet 9 and acquired or updated. As the recording medium, in addition to the FD920, the CD-ROM 922, and the like,
Optical recording medium such as DVD, magnetic recording medium such as MD,
A magneto-optical recording medium such as a PD, a tape medium, a magnetic recording medium, or a semiconductor memory such as an IC card or a miniature card can be used.

FD920 and CD as an example of a recording medium
The ROM 922 or the like can store some or all functions of the flowchart of the distribution source terminal 30, the client terminal 50, or the server device 70 described in the above embodiment. Therefore, it is possible to provide the following program and a storage medium storing the program. For example, the program for the distribution source terminal 30, that is, the software installed in the RAM 906 or the like, is the same as the distribution source terminal 30 shown in the above embodiment.
Each functional unit such as the information generation unit 32, the display switching unit 33, or the information output unit 34 is provided as software. Further, the program for the client terminal 50, that is, the software installed in the hard disk device 914 or the like, has the display information receiving unit 56, the information output unit 54, the same as the client terminal 50 shown in the above embodiment.
Alternatively, each functional unit such as the determination unit 58 is provided as software. Further, the program for the server device 70, that is, the software installed in the hard disk device 914 or the like, also has the source information receiving unit 72, the object compressing unit 74, or the object replacing unit 76, as in the server device 70 described in the above embodiment. Each functional unit such as is provided as software.

Then, a C storing a program for constituting each functional unit in the above-mentioned server device 70 or the like is stored.
The program is read from the D-ROM 922 or the like and installed in the hard disk device 914,
By reading the program from the hard disk device 914 and the CPU 902 executing the above processing procedure,
The above functions can be realized by software.

Further, these programs and the storage medium storing the programs may be provided as a version upgrade of the existing system or application software. Alternatively, it may be provided as an optional program corresponding to some functions, such as a patch file that realizes the seventh embodiment as software.

For example, the server device 70 is replaced by the electronic computer 10
When configured by, the CD-ROM drive 918 is
The data or program is read from the CD-ROM 922 and passed to the CPU 902. And the software is a CD
-Installed from the ROM 922 to the hard disk device 914. The hard disk device 914 includes data or programs read by the FD drive 916 or the CD-ROM drive 918, the CPU 902, and the like.
Stores the data created by executing the program, reads the stored data or program, and passes it to the CPU 902. Hard disk device 9
The software stored in 14 is read by the RAM 906 and then executed by the CPU 902. For example, the CPU 902 processes in the same manner as in the above embodiments based on the programs stored in the ROM 904 and the RAM 906, which are examples of recording media. Communication I / F 908
It mediates the transfer of communication data to and from a communication network such as the Internet 9.

Although the present invention has been described using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be added to the above-described embodiment, and a mode in which such changes or improvements are added is also included in the technical scope of the present invention. In addition, the above-described embodiments do not limit the claimed invention, and not all combinations of the features described in the embodiments are essential to the means for solving the invention.

For example, in each of the above embodiments, the distribution source terminal 30, the client terminal 50, and the server device 70 are provided independently of each other. However, for example, the distribution source terminal 30 and the server device 70 are provided. May be integrated, that is, the distribution source terminal 30 may have the function of the server device 70. In this case, the original information having a large amount of data is transferred to the server device 70 via the Internet 9.
Eliminates the need to upload to.

Further, in the first or second embodiment, an example in which the file size of information is made compact by converting a high resolution image into a low resolution image has been described, but a method other than resolution conversion is used. The information may be compressed by converting data for each individual object or for the entire information. For example, in the case of information including a still image object, the uncompressed bitmap (B
MP image data is converted to JPEG (Joint Photographic
It may be converted into image data of Experts Group) format.
Also, regardless of whether it is a still image or a moving image, the entire original information file created by the application software for creating information is
You may convert into a file of DF format or the like. Further, in the case of information including a moving image object, for example, 30 fps
The frame rate of the moving image may be reduced by converting (frameper sec) to 1 fps.

Further, in the first or fifth embodiment,
When the server device 70 is requested by the client terminal 50 to deliver the source information, the IFr requests the source information requested page registered in the database 80 on demand.
Client terminal 5 after converting to ame format data
Although it was distributed to 0, IRa for each page of source information
This IFrame format data is stored in the database 80 in advance in place of the me format data, and when the client terminal 50 requests the distribution of the source information, the IFrame format data of the requested page is transferred from the database 80. You may read and deliver.

Further, in the above embodiment, the original document (source information) is resolution-converted to generate the replacement information without waiting for the request from the client terminal 50, but the viewer slides on the client terminal 50 side. When the access is made, the resolution of the source information stored in the data center DC may be converted, and then the IFrame format data may be created and distributed. In this case,
It is advisable to acquire the screen resolution of the display 66 on the client terminal 50 side and convert it to a resolution that matches the screen resolution. In addition, after receiving the instruction of the maximum amount of data to be included in one slide and the maximum amount of time that may be taken to display one slide (for example, from the instructor), the resolution is automatically converted based on these values. The resolution may be determined.

Further, in each of the above-described embodiments, the replacement information having a smaller data amount than the original information is generated, and the data format of this replacement information is converted into the IFrame format data before being distributed to the client terminal 50. Then, the information distribution via the Internet 9 is more suitable than the case of distributing in the data format of the replacement information itself, but it is distributed to the client terminal 50 in the data format of the replacement information itself without data conversion to the IFrame format. You may.

Further, the communication network intervening in the information distribution is not limited to the Internet 9 which is an example of the public communication network, and may be another communication network. For example, it may be a specific communication network such as a company LAN that limits communication partners.

Further, in each of the above-described embodiments, the address information indicating the storage location of the source object or the source information is embedded in the replacement information as the correspondence information for associating the compressed object with the source object or the source information. Although the correspondence relationship with the source object and the source information is managed, the correspondence relationship may be managed using a management table, for example.

Furthermore, in each of the above-described embodiments, the image object whose data amount is larger than the predetermined amount is set as the compression target object. However, the compression target object is not necessarily an image object but may be a text object. For example, when the data amount of the text part included in the original information is larger than a predetermined amount, this text part is generated as a compression target object, and index text showing an outline of the original text part is generated as a compressed object. The replacement information including the index text is generated and the original text portion is registered in the database. In this case, when the display portion of the text is switched on the delivery source terminal 30 side, the index text for the switched text portion is delivered to the client terminal 50 side. Thus, the viewer on the client terminal 50 side can immediately view the outline of the switched text. Also, when displaying or printing the entire original text, or when editing the original text, the original text corresponding to the index text is read from the database and used. As a result, even if the information has a large number of pages consisting only of text objects, if the replacement information is sufficient such as only the summary display, the replacement information with a small file size is handled, and the transfer time of the information is significantly reduced. Therefore, it is extremely easy to match the display synchronization between the distribution source terminal 30 side and the client terminal 50 side.

[0128]

As described above, according to the present invention, the replacement information having a small amount of data is generated by using the compressed object, and the original object or the intermediate object is stored as the source object for the compressed object. Then, the display information selected from the replacement information is delivered to the client terminal.

As a result, the client terminal can receive the information after switching in real time in conjunction with the display switching of the distribution source terminal. In other words, the display content on the distribution source and the display content on the client side can be synchronized with each other. On the other hand, when printing or editing, the stored information including the source object can be used. That is, according to the present invention, it is possible to achieve both the matching of the display synchronization and the high-quality printing or re-editing using the original information or the information substantially equal to the original information.

[Brief description of drawings]

FIG. 1 is a diagram summarizing the differences between embodiments of an information distribution method and an information distribution system according to the present invention.

FIG. 2 is a block diagram showing a first embodiment of the information distribution system of the present invention.

FIG. 3 is a flowchart showing a processing procedure in the information distribution system of the first embodiment.

FIG. 4 is a block diagram showing a second embodiment of the information distribution system of the present invention.

FIG. 5 is a flowchart showing a processing procedure in the information distribution system of the second embodiment.

FIG. 6 is a block diagram showing a third embodiment of the information distribution system of the present invention.

FIG. 7 is a flowchart showing a processing procedure in the information distribution system of the third embodiment.

FIG. 8 is a block diagram showing a fourth embodiment of the information distribution system of the present invention.

FIG. 9 is a block diagram showing a fifth embodiment of the information distribution system of the present invention.

FIG. 10 is a block diagram showing a sixth embodiment of the information distribution system of the present invention.

FIG. 11 is a block diagram showing a seventh embodiment of the information distribution system of the present invention.

FIG. 12 is a diagram showing an example of a hardware configuration when a distribution source terminal, a client terminal, and a server device are configured using an electronic computer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Information delivery system, 30 ... Delivery source terminal, 32 ... Information generation part, 34, 54 ... Information output part, 40 ... Source object registration part, 42, 74 ... Object compression part, 64, 8
4 ... Source object receiving unit, 45, 65, 76 ... Object replacing unit, 50 ... Client terminal, 56 ... Display information receiving unit, 58 ... Judgment unit, 59 ... Source information receiving unit, 70 ...
Server device, 72 ... Source information receiving unit, 78 ... Display information output unit, 80 ... Database, 82 ... Source information output unit, 86 ...
Source object output unit, 90, 94 ... Intermediate compression unit, 92
... Intermediate information generating unit, 96 ... Streaming video generating unit, DC ... Data center

Claims (32)

[Claims] 1. An information distribution system, comprising a distribution source terminal, a client terminal, and a server connected to a network, for distributing information from the distribution source terminal to the client terminal, wherein the distribution source terminal is an image object. While transmitting the original information including to the server device, from among the original information, the image displayed on the client terminal side is instructed, and the server device is the original information received from the distribution source terminal. A low-resolution image is generated by reducing the resolution of at least one high-resolution image included, and the generated low-resolution image is used to generate replacement information having a smaller amount of data than the original information. , The display information indicating the image displayed on the client terminal side is selected from the generated replacement information and distributed to the client terminal. At the same time, the original information is stored in a predetermined storage medium in association with the low resolution image, the client terminal displays the image using the display information distributed from the server device, and prints the image. An information distribution system, wherein the original information stored in the predetermined storage medium is used when there is access or editing access to the low-resolution image of the displayed and output images. 2. An information distribution system for distributing information to a client terminal, comprising: an object compression unit for compressing a data amount of at least one object included in original information composed of individual objects; An information compression unit that generates replacement information having a smaller data amount than the original information by using a compressed object that is an object compressed by the object compression unit, and the compressed object compressed by the object compression unit , An intermediate object having a larger data amount than the original object or the compressed object included in the original information and a smaller data amount than the original object, is associated with the compressed object as a source object. A source object stored in a predetermined storage medium. An object storage unit, a delivery control unit that selects display information indicating an image displayed on the client terminal side from the replacement information generated by the information compression unit, and the replacement based on an instruction from the delivery control unit. A display information output unit that selects and outputs the display information from information, a determination unit that determines whether it is preferable to use the original information, and the display output from the display information output unit Output using information and output using information containing the source object stored in the source object storage when the determination section indicates that it is preferable to use the original information. An information delivery system, comprising: an information output unit that performs processing. 3. The information distribution system according to claim 2, wherein the determination unit determines that it is preferable to use the original information when an editing or printing access is made. 4. The source object storage unit stores, as source information, all information including the source object for all objects included in the original information, and the information output unit stores the original information. 4. The output process according to claim 2, wherein the source information stored in the source object storage unit is used to perform the output process when the determination unit indicates that it is preferable to use. Information distribution system. 5. A larger amount of data than the replacement information is obtained by replacing the compressed object among the objects included in the replacement information with the source object stored in the source object storage unit. And further comprises an information decompression unit that generates intermediate information having a smaller data amount than the original information as source information, wherein the source object storage unit stores the entire information including the source object in the compressed object. The corresponding source objects are stored individually, and the information output unit stores the source information generated by the information decompression unit when the determination unit indicates that it is preferable to use the original information. The information distribution system according to claim 2 or 3, wherein the output processing is performed by using the information distribution system. 6. The object compression unit compresses the data amount of the image object by reducing the resolution of the image object included in the original information. The information distribution system according to any one of 1. 7. The object compression unit compresses the data amount of the moving image object by converting the moving image object included in the original information into a still image. The information distribution system according to any one of the above. 8. The apparatus further comprises a streaming video generation unit for converting a moving image object included in the original information into a streaming image, wherein the source object storage unit stores the streaming image converted by the streaming video generation unit. The information distribution system according to claim 1, wherein the source object is stored in association with the still image. 9. The object compression unit is hidden by the overlapping portion of the plurality of image objects when the object compressing portion has an overlapping portion in at least a part of the plurality of image objects included in the original information. 9. The information delivery system according to claim 6, wherein the part is deleted. 10. An information distribution method for distributing information to a client terminal, wherein an original object included in original information composed of individual objects or a compressed data volume of the original object is compressed. An intermediate object having a larger amount of data than the original object and a smaller amount of data than the original object is stored as a source object in association with the compressed object, and stored when a request is received from the client terminal. An information distribution method comprising: distributing the source object to the client terminal. 11. Display information indicating an image displayed on the client terminal side is selected from among replacement information having a smaller amount of data than the original information including the compressed object and distributed to the client terminal. The information distribution method according to claim 10, wherein: 12. A server device used in an information distribution system for distributing information to a client terminal, the original object being included in original information composed of individual objects, or data of the original object. A source object that stores an intermediate object having a larger amount of data than the compressed object of which the amount is compressed and a smaller amount of data than the original object as a source object in a predetermined storage medium in association with the compressed object. A server device comprising: a storage unit; and an output unit that outputs a source object stored in the source object storage unit in response to a request from the client terminal. 13. The source object storage unit stores, as source information, all information including the source object for all objects included in the original information, and the output unit requests from the client terminal. 13. The server device according to claim 12, which receives the source information and outputs the source information stored in the source object storage unit. 14. The source object storage unit individually stores the source objects corresponding to the compressed objects without storing the entire information including the source object, and the output unit outputs the source objects from the client terminal. 13. The server device according to claim 12, wherein each of the source objects stored in the source object storage unit is individually output in response to the request from the server. 15. An object compression unit for compressing a data amount of at least one object included in the original information, and a compressed object which is an object compressed by the object compression unit, The display information indicating the image displayed on the client terminal side is selected from the information compression unit that generates replacement information having a smaller amount of data than the information and the replacement information generated by the information compression unit, and the selected information is displayed on the client terminal. It further comprises a distribution control unit for distribution, and a display information output unit for selecting the display information from the replacement information based on an instruction from the distribution control unit and distributing it to the client terminal. 15. The server device according to any one of items 12 to 14. 16. A replacement information receiving unit for receiving replacement information having a smaller amount of data than the original information, and an image displayed on the client terminal side from the replacement information received by the replacement information receiving unit. A distribution control unit that selects display information and distributes it to the client terminal, and a display information output unit that selects the display information from the replacement information based on an instruction from the distribution control unit and distributes it to the client terminal. 15. The server device according to claim 12, further comprising: 17. The information compressing unit embeds address information indicating a storage destination of the source object in the display information in association with the compressed object, the source object storing unit according to the address information. The source object is stored in association with the compressed object.
The server device according to claim 1. 18. The compressed one of the objects included in the replacement information having a smaller data amount than the original information including the compressed object obtained by compressing the data amount of the original object included in the original information. An information decompression unit is further provided, which replaces an object with the source object to generate intermediate information having a larger data amount than the replacement information and a smaller data amount than the original information or the original information as the source information. 18. The server device according to claim 12, wherein the server device is a server device. 19. A client terminal for receiving information distribution, comprising: a judging unit for judging whether or not it is preferable to use original information composed of individual objects; and a data amount larger than that of the original document. It is preferable to use a display information receiving unit that receives display information selected from replacement documents with a small number of replacement documents, a display output using the display information received by the display information receiving unit, and use the original information. When the determination section indicates that, the intermediate information or the original information having a larger data amount than the replacement information and a smaller data amount than the original information is used as the source information for output processing. A client terminal comprising an output unit. 20. The information output unit, according to the address information embedded in the display information, has a larger data amount than the compressed object and a smaller data amount than the original object, or the original object. The source information corresponding to the display information is used by reading out the source information.
9. The client terminal according to item 9. 21. A source information receiving unit that receives the source information is further provided, and the information output unit performs the output processing by using the source information received by the source information receiving unit. Item 21. The client terminal according to Item 19 or 20. 22. A source object receiving unit that receives, as a source object, an intermediate object that has a larger amount of data than the original object or the compressed object and a smaller amount of data than the original object, and is included in the replacement information. By replacing the compressed object in the source object with the source object received by the source object receiving unit, the data amount is larger than the original information or the replacement information and the data amount is larger than the original information. The information decompression unit that generates the pre-intermediate information with a small amount as the source information is further provided, and the information output unit performs the output processing by using the source information generated by the information decompression unit. Item 21. The client terminal according to Item 19 or 20. 23. A distribution source terminal used in an information distribution system for distributing information to a client terminal, wherein an image displayed on the client terminal side is selected from replacement information having a smaller data amount than the original document. A distribution control unit that selects display information to be distributed to the client terminal, and a display information output unit that selects the display information from the replacement information based on an instruction from the distribution control unit and distributes the display information to the client terminal. And a delivery source terminal. 24. An object compression unit that compresses a data amount of at least one object included in the original information composed of individual objects, and a compressed object that is an object compressed by the object compression unit. 24. The distribution source terminal according to claim 23, further comprising: an information compression unit that generates the replacement information having a smaller amount of data than the original information by using. 25. Address information indicating a storage destination of an intermediate object having a data amount larger than that of the compressed object and a data amount smaller than that of the original object or a source object which is the original object. 25. The delivery source terminal according to claim 24, wherein is embedded in the replacement information in association with the compressed object. 26. A program for a server device used in an information distribution system for distributing information to a client terminal, comprising: a computer, an original object included in original information composed of individual objects, or Predetermined storage in association with the compressed object, with an intermediate object having a larger data amount than the compressed object obtained by compressing the data amount of the original object and a smaller data amount than the original object as a source object A source object storage unit to be stored in a medium, and a program that functions as an output unit that outputs a source object stored in the source object storage unit in response to a request from the client terminal. 27. A distribution control unit for causing a computer to select display information indicating an image displayed on the client terminal side from replacement information having a smaller amount of data than the original information and distribute the display information to the client terminal. 27. The program according to claim 26, wherein the program functions as a display information output unit that selects the display information from the replacement information based on an instruction from the distribution control unit and distributes the display information to the client terminal. 28. A program for a client terminal to receive information distribution, comprising: a judgment unit for judging whether or not it is preferable to use original information composed of individual objects in a computer; Display information receiving section for receiving display information selected from replacement documents having a smaller amount of data than the document, and using the display information received by the display information receiving section for display output, and the original information. When the determination unit indicates that it is preferable to use, the intermediate information or the original information having a larger data amount than the replacement information and a smaller data amount than the original information is used as the source information. A program characterized by causing it to function as an information output unit for performing an output process. 29. A program for a delivery source terminal used in an information delivery system for delivering information to a client terminal, wherein the computer is configured to select the replacement information having a smaller amount of data than the original document from the client terminal side. A distribution control unit that selects display information indicating an image displayed by and distributes the display information to the client terminal, and selects the display information from the replacement information based on an instruction of the distribution control unit and displays the display information on the client terminal. A program characterized by causing it to function as a display information output unit for distribution. 30. A computer-readable storage medium storing a program for a server device used in an information distribution system for distributing information to a client terminal, the program comprising a computer and individual objects. As the source object, an intermediate object having a larger data amount than the original object included in the original information or a compressed object obtained by compressing the data amount of the original object and having a smaller data amount than the original object, A source object storage unit that stores the compressed object in a predetermined storage medium in association with the compressed object, and an output unit that outputs a source object stored in the source object storage unit in response to a request from the client terminal. Memory characterized by making it function as Medium. 31. A computer-readable storage medium storing a program for a client terminal to receive information distribution, wherein the program causes a computer to use original information composed of individual objects. A determining unit for determining whether or not it is preferable, a display information receiving unit for receiving display information selected from replacement documents having a smaller data amount than the original document, and the display received by the display information receiving unit. When the information is displayed and output, and the determination unit indicates that it is preferable to use the original information, the data amount is larger than the replacement information and smaller than the original information. A storage medium that functions as an information output unit that performs output processing using intermediate information or the original information as source information. 32. A computer-readable storage medium storing a program for a distribution source terminal used in an information distribution system for distributing information to a client terminal, wherein the program causes the computer to read more than the original document. A distribution control unit that selects display information indicating an image displayed on the client terminal side from the replacement information having a small amount of data and distributes the display information to the client terminal, and replaces the replacement information based on an instruction from the distribution control unit. A storage medium that functions as a display information output unit that selects the display information from among the display information and distributes it to the client terminal.