JPH1083172A - Data conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively use a display screen by converting image information made to be displayed on the display screen having a certain aspect ratio to the image information displayed on the display screen having the aspect ratio different from that. SOLUTION: A document temporary storage part 2204 stores the multimedia data expected to display on the display screen of the aspect ratio 4:3. An output device information storage part 2203 stores the size of the display screen of the aspect ratio 16:9. An image information generation part 2206 decides whether or not the blank of the display screen exists in the display of the image information converting the multimedia data from a font size such as display character, etc., and the display screen size stored in a data conversion table storage part 2202, and when the blank exists, writes the image information in a generated information temporary storage part 2208. A link information generation part 2207 generates control information switching the display of the image information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data converter used for a television broadcasting system, and more particularly, to an Internet HTML (Hyper Text).
The present invention relates to a data conversion device that converts a document described in Markup Language into a television broadcast format.

[0002]

2. Description of the Related Art In recent years, the development of information providing services via the Internet has been remarkable, and their use forms have been various. On the other hand, also in a television broadcasting system, a conventional standard screen having an aspect ratio (screen ratio) of 4: 3 and a wide screen of 16: 9 coexist.

[0003] The standard screen and the wide screen are:
The number of pixels in the horizontal (X) direction is different. If a program video broadcast assuming a conventional standard screen is displayed as it is on this wide screen, a portion where nothing appears on the screen occurs. In order to eliminate this part, there is a technique in which the video is stretched in the horizontal direction and displayed, so that the program video is enlarged and displayed on the entire wide screen.

A batch type electronic typesetting system (Te
In x), there is a technique of performing typesetting from character information and image information and automatically dividing a page.

[0005]

However, in the above-described technique of enlarging display on a wide screen, the video signal is simply extended, and the image displayed on the wide screen is distorted. When multimedia data including character information, image information, and control information intended to be displayed on a personal computer screen such as a World Wide Web (WWW) homepage is displayed on the wide-screen television, the number of pixels in the X direction is reduced. If it is displayed as it is because it is different, there is a part where nothing is reflected, the screen can not be used effectively, and if the enlargement display technology is used, the characters will be landscaped,
For example, a product video displaying product information cannot convey accurate information unlike actual products.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a data conversion device for converting multimedia data intended to be displayed on output devices having different aspect ratios so that the video can be displayed without damaging the video. Aim.

[0007]

According to a first aspect of the present invention, there is provided a data conversion device for converting an original document including character string information and image information described together with a plurality of control statements so as to be displayed on a first display screen into a first document. Second screen different from the aspect ratio of the display screen
A data conversion device for converting the original document into a reproduced image to be displayed on a display screen, the original document obtaining unit obtaining the original document from outside, and a display screen size storing unit storing a size of a second display screen. Conversion information storage means for storing conversion information for each control sentence when the original document is converted into a reproduced image on the second display screen, and a plurality of storages adapted to the size of the second display screen Area storage means having an area, and reproduced image conversion means for reading character string information and image information from the original document obtaining means and referring to the conversion information to convert it into a reproduced image element which is one unit of a reproduced image When,
When there is an unstored area determination unit that determines whether or not the area storage unit has an unstored area in which the playback image element converted by the playback image conversion unit is written according to the conversion information, When it is determined, when it is determined that there is no reproduced image element writing means for writing the reproduced image element to the unstored area and the unrecorded area determination means,
A new reproduced image element writing means for writing the reproduced image element into another storage area of the area storage means.

With such a configuration, the unrecorded area determination means determines whether or not there is an unrecorded area (margin) in the storage area of the storage means. Since the margin of the element is written, the margin of the display screen can be effectively used, and an unnatural image is not generated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a data converter of a data communication system according to the present invention will be described based on embodiments. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a data communication system 100 according to Embodiment 1 of the present invention.
The data communication system 100 includes a data transmission device 110 and a plurality of data reception devices 150.

[0010] The data transmitting device 110 includes an information acquiring unit 11.
1, transmission data generation unit 112, transmission data holding unit 11
3. It includes a transmission data readout unit 114, a multiplexing unit 115, and a transmission unit 116. The data receiving device 150 includes a reception separation unit 151, a reception data holding unit 152, a reproduction unit 15
3, a display unit 154, a control unit 155, a signal receiving unit 156, and an audio output unit 157. (Description of Configuration of Data Transmission Apparatus 110) Each configuration of the data transmission apparatus 110 will be described below with reference to FIGS. (Description of Configuration of Information Acquisition Unit 111) Information Acquisition Unit 111
Includes an acquisition list storage unit 121 and a buffer (not shown) that holds information acquired from an external database such as a WWW server.

The acquisition list storage unit 121 stores an acquisition list indicating an acquisition destination of information to be acquired by the information acquisition unit 111 and a file name of the information to be acquired in association with an acquisition order number indicating the acquisition order. It is stored in advance. FIG. 2 is an explanatory diagram illustrating an example of the acquisition list 200 stored in the acquisition list storage unit 121. Note that the file name extension ". html ”indicates that an HTML document is stored in the file, and has the extension“ .html ”. "gif" indicates that the file stores image information compressed in the GIF format. In addition, the extension ". au "
Indicates that audio information in the AU format is stored in the file.

In the acquisition list storage unit 121, for example, an information acquisition unit 111 is connected to the Internet.
When information is set to be acquired from the WW server, an acquisition list 200 as shown in FIG. 2 is stored. In the acquisition list 200, the URL of the WWW server including the directory portion is stored as the acquisition destination name 202 in association with the acquisition order number 201. Also, the home page provided by each WWW server is such that each page is represented by one HTML document and an image information file and a sound information file whose file names are specified in the HTML document. As the file name 203 to be acquired, the file name of the HTML document describing the page, the file name of the image information, and the audio information file name are stored in page units.

In the acquisition list storage unit 121, the acquisition destination and the file name do not necessarily need to be described separately, and may be represented by one URL. When the information acquisition unit 111 does not acquire a WWW server, the acquisition destination is represented by the device address of the external database, and the file to be acquired is represented by the file address.

The information acquisition unit 111 is provided in the acquisition list storage unit 1
21, the URL of the acquisition destination and the file name of the information to be acquired are read out in the order of the acquisition order number 201, and the URL is read out.
To access the WWW server indicated by (1) and acquire the file with the file name. The information acquisition unit 111 assigns a file name to the acquired file and stores the file in the buffer. (Exemplary Description of Acquired File) Hereinafter, the contents of the file acquired by the information acquiring unit 111 will be specifically described with reference to FIGS. 3, 4, 5, and 6. FIG.

FIG. 3 shows an HTML document 301 “Report.
html ”. FIG. HTML document 3
01 "Report. html ”means that the file name is“ Report. html ”stored in a file“ html ”. In each HTML document, a control code represented by <(character string)> is called a tag, and is used in principle as a set of <(character string)> and </ (character string)>. The character string in <> indicates the control content of the tag.

<HTML> in line 311 and </ HTML> in line 323 are the same as the character string sandwiched between <HTML> and </ HTML>.
1 is shown. <H1> and <//
H1> indicates that the character string “weather forecast” between them is the headline of this document.

<CENTER> in row 313 and row 315
</ CENTER> indicates that the display element of the document represented by the character string sandwiched between them is displayed in the middle. <IMG SRC in line 314
= “Weather.gif”> indicates image information 401 “Weather.gif” shown in FIG. gif ”is included at this position as a document display element. The attribute “SRC =” of the tag <IMG> indicates the designation of the image information file, and the attribute value ““ We
ather. gif "" indicates the file name of the specified file.

FIG. 4 shows image information 401 "Wea" which is an example of an image displayed on the first page of the WWW homepage.
ther. FIG. As shown in FIG. 4, the image information file "Weather. The image information 401 stored in “gif” represents an image of a schematic Japan map showing the weather in various parts of Japan.

Lines 316 and 31 of the HTML document 301
7 means that the character string “Tomorrow will be springy throughout the country” surrounded by <P> and </ P> is one paragraph in the text of this document. Represent. <UL> in line 318 and </ UL> in line 322 indicate the display element of the document represented by the character string between them.
This indicates that the information is to be displayed in a bulleted format with unnumbered headings.

<LI> in lines 319 and 320 indicates that the character string up to the next <LI> or </ UL> will be one item in the list. Row 319
<A HREF=“Tokyo.html”> Tokyo </A> is obtained by converting the character string “Tokyo” into H shown in FIG.
The TML document 501 “Tokyo. html ”is linked. A character string or an image with a link to another file, such as the character string “Tokyo”, is called a hot spot or an anchor point. For example, when the hot spot “Tokyo” displayed on the monitor of the personal computer by the browser is selected by the user's mouse operation or the like, the HTML document 501 “Tokyo.
html ”is read by the browser, and the display image is displayed. Also, the attribute “HR” of the tag <A>
“EF =” indicates the designation of the link destination of the tag <A>, and the attribute value ““ Tokyo.html ”” indicates the file name of the link destination.

<A HREF = "Osak" in line 320
a. html “> Osaka </A> is converted from the character string“ Osaka ”to an HTML document 601“ Osak ”shown in FIG.
a. html ”is linked. The character string “Osaka” in line 320 is also the character string “Tokyo” in line 319
Is the same hotspot as above, and if the character string “Osaka” is selected, the H linked to the character string “Osaka”
The TML document 601 “Osaka. html ”is displayed on the monitor.

<A HREF = “Weath” in line 321
er. au “> voice description </A> indicates that a link is provided from the character string“ voice description ”to voice information“ Weather.au. ”The character string“ voice description ”is a hot spot, When the character string “voice description” is selected, the linked voice information “Weather
r. au ”is reproduced.

FIG. 5 shows an HTML document 501 "Tokyo" describing an example of the second page of the WWW homepage.
o. html ”. FIG. HTML document 50
Since the tag described in No. 1 has already been described, a description thereof will be omitted except for a description of a link to another page. <A HREF = “Repo” in line 511
rt. html “> return </A> is converted from the character string“ return ”to the HTML document 301“ Report.
html ”is linked.

FIG. 6 shows an HTML document 601 “Osak” describing an example of the third page of the WWW homepage.
a. html ”. FIG. HTML document 60
Since the tag described in No. 1 has already been described, a description thereof will be omitted except for a description of a link to another page. <A HREF = “Repo” in line 611
rt. html “> return </A> is converted from the character string“ return ”to the HTML document 301“ Report.h ”shown in FIG.
tmml "is linked.

The information acquisition unit 111 may continuously acquire all the files shown in the acquisition list storage unit 121 and store all the acquired files in the buffer, or may store the acquired files in page units. A file may be acquired and stored in the buffer, and the next file may be acquired each time processing of the page by the transmission data generation unit 112 described below is completed. (Description of Configuration of Transmission Data Generation Unit 112) The transmission data generation unit 112 includes a data conversion table storage unit 122 and a storage area (not shown) serving as a work area for generating transmission data. The data conversion table storage unit 122 stores each HT
A tag table indicating the control contents of the ML tag and the corresponding flag, a font file containing a character font for TV display for each application, and a link indicating a format for link information describing a hot spot for the data communication system 100 And an information table. The work area includes a file storage area for holding an HTML document of one file, a tag storage area for securing a character string sandwiched between <> in a tag, and a character storage area other than a tag. And a flag storage area for setting a flag for controlling generation of display image information representing image data corresponding to one frame.
The character string written in the tag storage area and the character string written in the character string storage area are deleted each time the processing corresponding to the tag (flag) is completed. If there are a plurality of flags in the flag storage area, they are set in order from the top and reset in order from the bottom.

FIG. 7 shows a data conversion table storage unit 122.
FIG. 5 is an explanatory diagram showing an example of a link information table 700 stored in the storage device. Note that “9” shown in the link information table 700 represents a single-digit decimal number. As shown in the link information table 700, the link information includes index information 701 and hot spot information 702, and the index information 701 and the hot spot information 70
2 is represented by a character string sandwiched between <>.

The index information 701 includes an information identification section “INDEX =” indicating that it is index information.
And a file identification number represented by a four-digit decimal number. The file identification number indicates the identification number of the file of the transmission data to which the index information belongs. The hot spot information 702 includes an information identification unit “HOTSPOT” indicating hot spot information and XY coordinates “X = 999, Y” indicating a cursor display position in a display image represented by corresponding display image information. = 999,]
It is composed of a command “GO_TO_PAGE” associated with the cursor displayed at the XY coordinates and a variable value of the command represented by a four-digit decimal number. The variable value of the command indicates the identification number of a file of another transmission data linked to the cursor.

The transmission data generating unit 112 handles a set of display image information, audio information, and link information generated based on one HTML document as one transmission data file. The transmission data generation unit 112 stores a transmission data file in each of the display image information storage unit 123, the audio information storage unit 124, and the link information storage unit 125 provided in the transmission data holding unit 113 described later. A storage area for storing the displayed image information, audio information, and link information in association with each other is set. Hereinafter, the storage area in the display image information storage unit 123 is referred to as a display image information storage area, the storage area in the audio information storage unit 124 is referred to as an audio information storage area, and the storage area in the link information storage unit 125 is referred to as a link information storage area.

Further, the transmission data generation unit 112 includes a display image information storage area, an audio information storage area, a link information storage area, and a display image information storage area set to store display image information, audio information, and link information of the same transmission data file. Are assigned the same identification numbers for reading transmission data. Further, the transmission data generation unit 112 manages the voice information and the link information belonging to the same transmission data file as one file, and attaches the same identification number to them.
The identification number is given, for example, as an acquisition order number 201 in the acquisition list 200 corresponding to the file name 203 of the acquired file.

The transmission data generation unit 112 includes the information acquisition unit 1
The unprocessed HTML document file acquired by 11 is retrieved from the buffer in the information acquisition unit 111 according to the acquisition order number 201 of the acquisition list 200, written into the file storage area of the work area, and index information of the link information table 700 is written. The index information is generated according to the format 701. Further, the generated index information is stored at the head of the link information storage area of the transmission data holding unit 113.

Further, the transmission data generation unit 112
When tags are read in order from the beginning of the ML document, the read tags are compared with the tag table, and the control contents of the tags are interpreted. The interpretation of the control contents is as follows. The character string following the tag start character "<" is written into the tag storage area of the work area one by one until the tag end character ">" appears. The character string written in the work area, that is, the character string sandwiched between "<" and ">" is interpreted by comparing it with the tag table.

If the read tag is <(a character string other than "A", "IMG" or "a character string starting with /")>, the transmission data generating unit 112 first sets a flag indicating the interpretation result. The character string sandwiched between the tag <> and the corresponding tag </> is set in the character string storage area of the work area, in the flag storage area of the work area. The method of securing the character string sandwiched between the corresponding tags in the character string storage area is the same as that of the character string in the tag. Next, the secured character string is converted into a character image using the character font in the font file, and display image information in which the character image is arranged according to the flag is generated. Next, the generated display image information is added to the display image information storage area set in the transmission data holding unit 113. Also, what follows the tag <> is not a character string,
If it is another tag <(another character string)>, only the flag corresponding to the previous tag <> is set in the flag storage area, and the tag corresponding to the next tag <(another character string)> is set. Perform processing.

If the read tag is <IMG>, the transmission data generation unit 112 sets the attribute “SRC =”
The image information file of "" file name "" specified by the file name is extracted from the buffer of the information acquisition unit 111, decompressed in a format corresponding to the extension of the file name, and fixed in a format such as bitmap data or graphic data. Is converted into image information represented by. For example, the extension of the file name of the specified image information file is “. gif "
Then, the image information is expanded according to the GIF format,
It is converted into image information of a predetermined format. If there is a higher-level flag indicating the control content for the converted image information, the display image information is generated such that the image is arranged at the display position according to the initial setting if there is no higher-order flag. Then
The generated display image information is added to the display image information storage area.

If the read tag is the tag <A>, the transmission data generation unit 112 determines that the attribute of the tag <A> is “H”.
REF = ”, the“ “link destination file” ”has the extension“. au ”or the like. If it is voice information, the voice information is extracted from the acquisition list storage unit 121, converted into voice information of a predetermined format, and the converted voice information is stored in the voice information storage area.

If it is not audio information, a character image is generated from a character string sandwiched between a tag <A> and a tag </A>, and the generated character image is displayed at a display position where a higher-order flag is placed, or Display image information is generated such that an area for displaying a cursor is opened from a display position according to the initial setting. The generated display image information is additionally stored in the display image information storage area of the transmission data holding unit 113. Next, XY of the cursor display position as an empty area
Calculate coordinates. Further, with reference to the hot spot information 702 of the link information table 700, the calculated XY coordinates of the cursor display position and the attribute “HREF” of the tag <A>
= ”And“ [link destination file name] ”
Generate hotspot information. At this time, by referring to the acquisition list 200, the acquisition order number 201 corresponding to the file name 203 is checked from the “<link destination file name” of the tag <A>, and the acquisition order number 201 is identified by the file. Describe in the hot spot information as a number. If the link destination file name does not exist in the acquisition list, the file name of the own file is set as the link destination file name. Next, the generated hot spot information is added to the link information storage area of the transmission data holding unit 113 and stored.

When the transmission data generation unit 112 completes all the processing for the content described in one HTML document by the above processing, the transmission data generation unit 112 actually stores the display image information in the display image information area. The identification number assigned to the display image information area is imaged and written at a fixed position in the non-display area. Here, the identification number is represented by a four-digit decimal number. However, the identification number may be any number of digits, may be a binary number, or may be a mixture of characters or numbers. There may be. It may be represented by a figure, a bar code, or the like. Alternatively, it may be a file name. Further, the voice information stored in the voice information storage area and the link information stored in the link information storage area are assigned to the corresponding storage areas in the same manner as a general digital data file. Attached identification number.

With the above processing, the transmission data generation unit 112 transmits the first page of the WWW home page from the acquired HTML document 301, audio information (not shown), image information 401, HTML document 501, and HTML document 601. Data 800, second page transmission data 900, and third page transmission data 1000 are generated. (Example of Transmission Data Generated by Transmission Data Generation Unit 112) FIG. 8 shows an HTML document 301 and audio information “W
earth. au ”and the transmission data 800 of the first page of the WWW home page generated from the image information 401
FIG. FIG. 9 is an explanatory diagram showing transmission data 900 of the second page of the WWW home page generated from the HTML document 501. FIG. 10 is an explanatory diagram showing the transmission data 1000 of the third page of the WWW home page generated from the HTML document 601. The transmission data 800 shown in FIG. 8 represents the first page of the WWW home page, and includes display image information 801 and audio information 802.
And link information 803 associated with the display image information 801. FIG. 8A shows display image information 801.
FIG. 8 is an explanatory diagram showing the contents of display image information 801 using a display image displayed based on the image. FIG. 8B is an explanatory diagram illustrating the audio information 802. FIG. 8C is an explanatory diagram showing the contents of the link information 803.

An area indicated by a broken line above the display image information 801 indicates a non-display area common to all display image information. The non-display area is not displayed on the display screen of the display unit 154. The identification number “0001” represented as an image by the transmission data generation unit 112 is written in the upper right corner of the non-display area.
In the displayed area, a character string represented by a character code in the original file is displayed as an image, and together with the image represented as image information, the entire image is displayed as one image on one screen. Represents an image. Audio information 8
02 is audio information linked to a character string “audio description” which is a hot spot in the HTML document 301. As shown in FIG. 8B, the file storing the audio information 802 is assigned an identification number “0001”.

As in the case of the audio information 802, as shown in FIG. 8C, the file storing the link information 803 is given an identification number "0001". The link information 803 is not displayed because it is control information. The line 811 in the link information 803 is the index information already described, and indicates that the identification number of the file of the transmission data 800 is “0001”.

A line 812 includes a command “GO” at a position on the display image information 801 represented by a coordinate value (100, 600).
_TO_PAGE (0002)], indicating that the cursor image held by the data receiving device 150 should be displayed at this position. The instruction "GO_TO_PAGE (0002)" is "000
2 ”indicates an instruction to display a page represented by the transmission data 900 with the identification number“ 2 ”.

A line 813 includes an instruction “GO” at a position represented by coordinate values (100, 700) on the display image information 801.
_TO_PAGE (0003)], indicating that the cursor image should be displayed at this position. Instruction "GO_TO_PAGE (000
3) is the transmission data 1 with the identification number “0003”.
000 indicates an instruction to display a page represented by 000.

Transmission data 900 shown in FIG. 9 represents the second page of the WWW home page, and includes display image information 901.
And link information 9 associated with display image information 901
02. FIG. 9A shows display image information 9 using a display image displayed based on the display image information 901.
It is explanatory drawing showing the content of 01. FIG. 9B is an explanatory diagram showing the contents of the link information 902.

The display image information 901 is the display image information 80
Similarly to 1, the identification number “0002” is written in the upper right corner of the non-display area indicated by the broken line. FIG. 9 (b)
As shown in the figure, the file storing the link information 902 is given an identification number "0002". A line 911 in the link information 902 indicates that the identification number of the file of the transmission data 900 is “0002”.

A line 912 includes a command “GO” at a position represented by coordinate values (050, 400) on the display image information 901.
_TO_PAGE (0001)], which indicates that the cursor should be displayed at this position.
The instruction “GO_TO_PAGE (0001)” is “00
01 "is displayed.

The transmission data 1000 shown in FIG.
Represents the third page of the W homepage and displays image information 10
01 and link information 1002 associated with the display image information 1001. FIG. 10A is an explanatory diagram illustrating the contents of the display image information 1001 using a display image displayed based on the display image information 1001. FIG.
(B) is an explanatory diagram showing the contents of the link information 1002.

In the upper right corner of the non-display area of the display image information 1001, the identification number "0003" is written as an image. Also, as shown in FIG.
The file storing the link information 1002 is given an identification number “0003”. Link information 1002
The row 1011 in the middle indicates that the identification number of the transmission data 1000 is “0003”.

In a row 1012, a command "GO_TO_PAGE (0001)" is associated with a position represented by a coordinate value (050, 400) on the display image information 1001, and a cursor should be displayed at this position. It represents that. The instruction "GO_TO_PAGE (0001)"
It represents a command to display the page represented by the transmission data 800 with the identification number “0001”. (Exemplary Description of Processing of Information Acquisition Unit 111 and Transmission Data Generation Unit 112) Hereinafter, the files exemplified in FIGS. 3, 4, 5, and 6 are acquired, and by using the files, FIGS. Information acquisition unit 111 until generation of ten transmission data
The processing of the transmission data generation unit 112 will be specifically described. (Processing of Information Acquisition Unit 111)
W server is requested to connect, and from the WWW server, an HTML document 301 "Report. html "
To get. Next, the acquired HTML document 301 has a file name “Report. html ”and store it in the buffer. Similarly, from the WWW server, the compressed image information 401, the HTML document 501, and the HTML document 6
Get 01. (Process of Transmission Data Generation Unit 112) Transmission Data Generation Unit 1
Reference numeral 12 denotes the display image information 8 in the transmission data holding unit 113.
01, a storage area for audio information 802, and a storage area for link information 803 are set. A storage area for storing the transmission data 800 is set in the set storage area. 0001 ”. Unprocessed HT from the buffer of the information acquisition unit 111
Takes out the ML document 301 and takes out the taken out HTML document 3
01 is written to the file storage area of the work area.

The transmission data generation unit 112 outputs the file name “Report. htm
1), the index information “<INDEX = 0001>” shown in the row 811 of the transmission data 800 representing the first page of the WWW home page is generated, and the Store.

The transmission data generation unit 112 reads the tag <HTML> in the line 311 from the HTML document 301. The character string “HTML” in the read tag <HTML> is
It is secured in the tag storage area in the work area, interpreted by referring to the tag table in the data conversion table storage unit 122, and
It identifies the start line of the TML document 301. Thereafter, the character string “HTML” in the tag storage area is deleted.

Next, the transmission data generation unit 112
Twelve tags <H1> are read, the tags <H1> are interpreted with reference to the tag table, and a heading flag is set in a flag storage area in the work area. The heading flag has the tag <H
The character string following <1> is a heading, indicating that it should be displayed using a heading font. Subsequently, the character string “weather forecast” is read as a result while the character string following the tag <H1> is written to the character string storage area one character at a time until the tag </ H1> appears.
Appears, the character string "weather forecast" in the character string storage area
Is converted into display image information using a predetermined heading font. The generated display image information is added to the display image storage area set in the transmission data holding unit 113. Reset the heading flag set in the work area,
The character string “weather forecast” secured in the character string storage area and the character string “H1” secured in the tag storage area are deleted.

The transmission data generation unit 112 reads the tag <CENTER> in the line 313 and sets a centering flag in the work area. The centering flag indicates that a character string read following the flag should be displayed in a centered state. Next, when an attempt is made to read a character string following the tag <CENTER>, there is no character string.

The transmission data generation unit 112 reads the tag <IMG SRC = “Weather.gif”> in the line 314 and reads the read tag <IMG SRC = “Wea.
ther. The transmission data generation unit 112 interprets the “gif”> with reference to the tag table.
ther. It is checked whether or not the file of the image information 401 represented by “gif” is present in the buffer of the information acquisition unit 111, and since it exists, it is read. Then, the image information compressed and stored in the read file is read. 401
Is converted into, for example, bitmap data according to the GIF expansion method.

The transmission data generation unit 112 reads the tag </ CENTER> in the row 315, and arranges the image information 401 converted into the bitmap data according to the centering flag set in the work area. The display image information thus generated is added to the display image storage area in the transmission data holding unit 113. Next, the centering flag of the work area is reset.

The transmission data generation section 112 reads the tag <P> in the line 316 and sets a paragraph flag. The paragraph flag indicates that the character string up to the tag </ P> following the flag should be displayed as one paragraph immediately after which a blank line is inserted. In the same manner as in line 312, "weather forecast", the character string "Tomorrow will be cheerful throughout the country" is read and secured in the character string storage area of the work area. Next, when the tag </ P> is read, the character string that it holds, "Tomorrow will be the merry spring nationwide"
Is converted into an image using the paragraph font stored in the font file, and the transmitted data
Is added to the storage area for the display image information 801 in FIG. Further, the work area is reset.

Similarly, the transmission data generation unit 112 outputs
The 18 tags <UL> are read and interpreted, and an itemized flag is set in the work area. The itemized flag indicates that a character string interpreted as a character string of one item after the flag should be itemized and displayed as an unnumbered item.
The transmission data generation unit 112 reads the tag <LI> in the line 319, refers to the tag table, interprets that it is the head of one item, and sets an item flag in the flag storage area. The item flag is either tag <LI> or tag </ UL>
Indicates that the display position of the display image should be changed to a new line when.

The transmission data generation unit 112 outputs the tag <LI>
Then, the tag <A HREF = “Tokyo.htm”
l ”> is read and written to the tag storage area. The transmission data generation unit 112 determines the tag <A H
REF = “Tokyo.html”> is interpreted, and a link flag is further set in the flag storage area. The link flag checks whether or not the link destination file is audio information from the extension of the attribute value in the tag <A>. If the link information is audio information, the audio information is converted into a predetermined format. Is stored in the audio information storage area to indicate that the processing for the tag <A> should be terminated. If the link destination file is not audio information, the link flag indicates a cursor immediately before the character string linked by the tag <A> between the tag <A> and the tag </A>. It is necessary to provide a blank area for two characters as a display area, image a character string, generate display image information of the character string, and further generate hot spot information according to the format of the hot spot information 702. Is shown.

The transmission data generation unit 112 outputs the tag <A H
REF = Read the character string “Tokyo” following “Tokyo.html”> until the tag </A> appears, and write it in the character string storage area of the work area. Transmission data generator 112
Reads the tag </A> and creates an image of the character string "Tokyo" by providing a blank space for two characters immediately before the character string "Tokyo", and arranges the character string "Tokyo" according to the bullet point flag Then, display image information is generated and added to the display image information 801 storage area of the transmission data holding unit 113. Next, the transmission data generation unit 112 calculates the coordinates of the display position of the cursor. Further, the calculated coordinate values (100, 600)
And the attribute value “T” stored in the tag storage area of the work area.
Okyo. html ", the hot spot information shown in the row 812 of FIG. 8 is generated. Next, the generated hot spot information is added to the link information 803 storage area in the transmission data holding unit 113. After that, the character string “AH” in the tag written in the tag storage area of the work area.
REF = “Tokyo.html” ”and the character string“ Tokyo ”written in the character string storage area are deleted, and the link flag is reset.

After reading the tag <LI> in line 320, the transmission data generating unit 112 changes the display position of the display image to a new line because of the presence of the item flag. And the hot spot information shown in the row 813 of FIG. 8 is generated. The generated display image information is stored in the transmission data holding unit 113.
The hot spot information is added to the storage area for the display image information 801 in the link information 8 in the transmission data holding unit 113.
03 is added to the storage area. After this, the character string “A
HREF = “Osaka.html” ”and the character string“ Osaka ”are deleted, and the link flag is reset.

Next, the transmission data generating unit 112
After reading the tag <LI> of No. 21, since the item flag is present, the display position of the display image is changed to a new line, and the tag <A HREF
= Set the link flag according to "Weather.au">. When the extension of the attribute value is checked according to the link flag, since the link destination file is audio information in the AU format, the AU format is converted into a predetermined format,
The converted voice information is stored in the storage area for voice information 802.

Next, when the tag </ UL> in the line 322 is read and the end of the itemization is interpreted, the itemization flag and the item flag are reset. Further, when the tag </ HTML> in the line 323 is read and the end of the HTML document 301 is interpreted, the generation processing of the transmission data 800 is completed. Thereafter, the transmission data generation unit 112 checks that there is an unprocessed HTML document 501, and stores a storage area for the display image information 901 in the transmission data holding unit 113,
Transmission data 90 including a storage area for link information 902
A storage area for storing 0 is set, and in both the set storage areas,
An identification number “0002” for reading the transmission data 900 is assigned. Retrieves an unprocessed HTML document 501 from the buffer of the information acquisition unit 111 and retrieves the retrieved HTML
Write the document 501 into the work area.

The transmission data generation unit 112 generates the file name “Tokyo. html "
, The index information “<IN” shown in the row 911 of the transmission data 900 representing the second page of the WWW homepage.
DEX = 0002>], and the transmission data holding unit 1
Thirteenth link information 902 is stored at the head of the storage area.
Hereinafter, the transmission data 900 can be generated from the HTML document 501 and the transmission data 1000 can be generated from the HTML document 601 in the same manner as the generation of the transmission data 800 from the HTML document 301 and the image information 401. Is omitted. (Transmission data holding unit 113, transmission data reading unit 11
4. Description of Configurations of Multiplexing Unit 115 and Transmission Unit 116) The transmission data holding unit 113 includes a display image information storage unit 123, an audio information storage unit 124, and a link information storage unit 125 that can be read simultaneously.

The display image information storage unit 123 stores, for example, R
It is realized by an AM or a hard disk device, and has a plurality of display image storage areas set by the transmission data generation unit 112. Each display image information storage area stores one of the display image information generated by the transmission data generation unit 112.
Retain files. The voice information storage unit 124
M and a plurality of audio information storage areas set by the transmission data generation unit 112. Each voice information storage area holds the voice information of one file generated by the transmission data generation unit 112.

The link information storage unit 125 is realized by a RAM, a hard disk device, or the like, and has a plurality of link information storage areas set by the transmission data generation unit 112. Each link information storage area holds one file of link information generated by the transmission data generation unit 112. The transmission data readout unit 114, from each storage area set in the transmission data holding unit 113, simultaneously displays display image information, audio information, and link information in the same transmission data file in the order of the identification number in the order of the identification number. And outputs them to the multiplexing unit 115. Further, after reading the transmission data file corresponding to the last identification number, the transmission data returns to the transmission data whose identification number is “0001”, and the transmission data is read in the order of the identification numbers. That is, the transmission data reading unit 114 cyclically reads the transmission data stored in the transmission data holding unit 113 in the order of the identification numbers, and outputs the transmission data to the multiplexing unit 115. At this time, the reading method differs between the case where the audio information does not exist and the case where the audio information exists, as follows. That is, when there is no voice information, the transmission data reading unit 114 reads the transmission data file once, and then proceeds to read the transmission data file of the next identification number. If the voice information exists, the voice information is read from the transmission data file, and further, the time required for reproducing the voice information,
After reading the display image information and link information of the transmission data file a plurality of times, the process proceeds to reading of the transmission data file of the next identification number. For example, assuming that the reproduction time of the audio information is 2 seconds, the transmission data readout unit 114 reads out the audio information once and also reads the display image information link information 60 times (2 seconds * 30 frames / second), and reads the next Move on to reading of the transmission data file of the identification number. As a result, the transmission time of the audio information is secured.

The multiplexing section 115 multiplexes the display image information (including audio information) read by the transmission data reading section 114 with the link information, and outputs the multiplexed information to the transmission section 116. The multiplexing method uses, for example, a conventional character multiplexing technology for TV broadcasting. In this case, the display image information and the audio information are multiplexed in the same manner as in a conventional broadcast program including images and audio, and the link information is multiplexed in the same manner as general text information multiplexed in a broadcast program. That is, when there is no audio information, the display image information is transmitted in the video section of the television video signal for one frame, and the link information is transmitted in the flyback section of the television signal for one frame. . When audio information is present, the audio information is a television audio signal, the display image information and the link information are
Over a plurality of frames required for the reproduction time of the audio data, the audio data is transmitted in the video section and the retrace section of the television video signal.

The transmitting section 116 sequentially transmits the transmission data multiplexed by the multiplexing section 115 as TV broadcast terrestrial waves. (Description of Transmission Data Transmission Method) FIG.
6 is an explanatory diagram illustrating a transmission method of transmission data according to No. 6; FIG. Note that FIG. 11 illustrates a case where the transmission data from the first page to the n-th page (n is a natural number) is generated by the transmission data generation unit 112. FIG.
Represents a set of display image information and audio information having the same identification number as one transmission unit corresponding to a normal TV broadcast program, and multiplexes link information having one identification number into the broadcast program. 1 corresponding to general character information
Expressed as a transmission unit.

As shown in FIG. 11, the same identification numbers are assigned to the display image information, audio information, and link information stored in the same transmission data file. It is transmitted in association with time. The transmission data from the first page to the n-th page held in the transmission data holding unit 113 is repeatedly transmitted in the order of the identification numbers.

Here, the transmission data reading unit 1
14, the display image information storage unit 123, the audio information storage unit 124, and the link information storage unit 12 storing the display image information, the audio information, and the link information stored in the same transmission data file.
5, the display image information, the audio information, and the link information are transmitted in association with both the identification number and the transmission timing. However, the display image information (including the audio information) and the link information are transmitted. Does not necessarily have to be transmitted up to the transmission timing. For example, the transmission data reading unit 114 is composed of two components, a first reading unit and a second reading unit. The first reading unit is generated in the display image information storage unit 123 and the audio information storage unit 124. The set of display image information and audio information is continuously read and output to the multiplexing unit 115, and the second reading unit continuously reads only the link information generated in the link information storage unit 125. Multiplexer 11
5 may be output. With this configuration, even when the display image information and the link information stored in the same transmission data file are transmitted at the same timing from the transmission unit 116, the timings at which the display image information and the link information are transmitted do not always match. Since the link information is provided with the identification number, the display image information and the link information corresponding to the data receiving apparatus 150 can be captured by the identification number.

A multiplexing unit 115 multiplexes the display image information (including audio information) generated by the transmission data generation unit 112 and the link information, and a transmission unit 116 transmits the multiplexed transmission data to a TV. Although it has been described that the broadcast image is transmitted by terrestrial broadcasting, the display image information and the link information need not always be multiplexed and transmitted. For example, the display image information and the audio information are transmitted by terrestrial TV broadcasting or digital satellite broadcasting. The link information may be transmitted using a telephone line and a modem. Also, transmission may be performed using a plurality of channels.

Further, when satellite digital broadcasting is used as a data transmission method, for example, a compression coding technique and a multiplexing technique based on the MPEG2 video standard and the system standard are used, the display picture information is an I picture, and the audio information is Alternatively, the link information may be transmitted as private information. As described above, when the display image information, the audio information, and the link information can be transmitted as digital data, the identification number imaged in the non-display area in the display image information as described above is written. It is not necessary to keep the information, and the display image information and the audio information can be transmitted with the identification number simply attached, similarly to the link information.
The MPEG2 standard is described in detail in "Latest MPEG Textbook" (released by ASCII Publishing Co., Ltd.).

FIG. 12 is an explanatory diagram of a multiplexed stream transmitted when satellite digital broadcasting is used. The upper part of the figure shows a transport stream according to the MPEG2 standard. This transport stream is
Multiplexed by the multiplexing unit 115. “V1, A1, L1” in the transport stream indicates display image information, audio information, and link information read from the transmission data file corresponding to the identification number 1 and multiplexed.
The same applies to “V2, A2, L2” to “Vn, An, Ln”.

"V1" is the I2 based on the MPEG2 standard.
This is a video elementary stream representing display image information converted into (Intra) pictures, and is provided with a PID (Packet IDentifier) “0x0100” for distinguishing the streams. The same applies to “V2” and thereafter. "A1"
Is an audio elementary stream representing audio information converted in conformity with the MPEG2 standard, and a PID “0x0101” for distinguishing the stream is provided. The same applies to “A2” and thereafter.

"L1 to Ln" are private sections conforming to the MPEG2 standard for carrying each piece of link information. A table ID "0xB0" for distinguishing a private section is provided. An identification number is set in the table ID extension to distinguish information. At least one set of a part of the image area in the corresponding display image and information indicating a link to another display image is set in each link information. For example, in “L1”, coordinates (X, Y) =
For the image area centered on (100, 600), the identifier 00
A link (GOTO_PAGE (0002)) to the display image of No. 02 is set, and a link (GOTO_PAGE) to the display image of identifier 0003 is set for an image area centered at coordinates (X, Y) = (100, 700).
PAGE (0002)) is set.

The correspondence between the PID and the identification number is based on the PMT (Program Map T
able). As shown in the figure, component in PMT
The correspondence between the PID and the identification number may be described in a descriptor in the private section, for example, by setting an identification number in _tag. In this case, the video elementary stream, the audio elementary stream, and the private section are created by the transmission data generation unit 112, and the transmission data holding unit 11
3 is stored. Further, the transport stream in FIG. 12 has a configuration created by the multiplexing unit 115.

If n sets of display image information, audio information and link information and PMT are multiplexed in the transport stream in this manner, transmission can be easily performed using satellite digital broadcasting. (Schematic processing procedure of entire data transmitting apparatus 110)
13 (a) to FIG. 14, the data transmission device 11
The processing procedure of 0 will be specifically described.

FIG. 13A is a flowchart showing a schematic processing procedure of the entire data transmitting apparatus 110. The information acquisition unit 111 acquires predetermined information from an external database and stores the information in an internal buffer (S1101). The transmission data generation unit 112 interprets the information acquired by the information acquisition unit 111, generates display image information, audio information, and link information, and stores them in the transmission data holding unit 113 (S
1102).

The transmission data reading unit 114 reads the transmission data in the transmission data holding unit 113 in order of the identification number (S1103). The multiplexing unit 115 multiplexes the read display image information (including audio information) and the link information, and the transmitting unit 116 transmits the multiplexed transmission data using the terrestrial TV broadcast ( S1104). (Processing Procedure of Information Acquisition Unit 111) FIG. 13B is a flowchart illustrating an example of a procedure of information acquisition processing by the information acquisition unit 111.

The information acquisition unit 111 is provided in the acquisition list storage unit 1
It is checked whether or not there is any information that has not been acquired by referring to the acquired information list in S21 (S1201). If not, the information acquisition process ends. If it exists, the acquisition destination address (URL) of the information that has not been acquired is 1
One is taken out (S1202). A connection is requested to the external database based on the extracted address (S1203), and it is confirmed whether or not the connection was successful (S1204). In the case of failure, the process returns to S1203 (S1204).

If the connection is successful, the file name of the information that has not yet been obtained is read from the obtained information list, the target file is obtained from the external database, and stored in the internal buffer (S1205). It returns to S1201. (Processing Procedure of Transmission Data Generation Unit 112) FIG. 14 is a flowchart illustrating an example of a procedure of transmission data generation processing by the transmission data generation unit 112.

The transmission data generation unit 112
It is checked whether or not there is an unprocessed HTML document by referring to the buffer in S11 (S1301). If not, the display image generation processing ends. If so, a storage area for storing transmission data is set in the transmission data holding unit 113, an identification number is assigned to the set storage area, and an unprocessed HTM is stored.
Take out one L document from the buffer (S130)
2).

From the file name of the extracted HTML document, index information indicating the file name of the transmission data is created and added to the link information storage area set in the transmission data holding unit 113 (S1303). HTM taken out
One character is read from the L document and written in the character string storage area (step S1304).

It is checked whether the read character is the tag start character “<” (S1305). If it is a tag start character, the process moves to S1307. If it is not the tag start character, the read character is added to the character string storage area in the work area and written, and the process returns to step S1304 (S1306). The next character is read one character (S1307). It is checked whether the character is a tag end character “>” (S1308). If it is a tag end character, the process moves to S1310. If it is not the tag end character, the read character is added to the tag storage area in the work area and written, and the process returns to S1307 (S1309).

The character string in the tag storage area is compared with the tag table to check whether the character string starts with "/" (S1310). If the character string starts with "/", it is checked whether the read tag is a </ HTML> tag (S1311). In the case of the </ HTML> tag, all the work areas are reset, and the process returns to S1301. </ HTM
L> If the tag is not a tag, processing is performed according to the least significant flag set in the flag storage area corresponding to the tag, and the corresponding storage area in the work area is reset (S
1312), and the process returns to S1304.

If it is determined in step S1310 that the character string does not start with "/", it is checked whether the read tag is an <IMG> tag (S1313). In the case of the <IMG> tag, the image information file having the file name specified by the attribute value of the <IMG> tag is extracted from the buffer of the information acquisition unit 111 (S1314). The extracted image information
According to the GIF expansion method, the image information is converted into image information represented by bitmap data, and the process returns to S1304 (S1315).

If the read tag is not the <IMG> tag, the character string in the tag storage area is compared with the tag table,
A flag corresponding to the tag is set in the flag storage area, or a process corresponding to the tag is performed (S1316).
Return to 1304. It should be noted that various tags are used in the HTML document, and processing corresponding to those tags can be performed in the same manner as an existing browser. Therefore, the following relates to the generation of link information generated in a format dedicated to the data communication system 100.
A> Only the processing for the tag will be described as an example of the processing in S1312.

FIG. 15 is a flowchart showing a specific example of a part of the processing procedure in S1312 of FIG.
<A> It is checked whether the tag is a tag (S1401).
<A> If it is not a tag, the process moves to S1408. In the case of the <A> tag, it is checked whether the link destination file indicated by the attribute value is a voice information file (S1402). If the file is a voice information file, the process moves to step S1407.

If the file is not a voice information file, the display image information of the character string secured in the character string storage area is generated by opening the display area of the cursor figure and added to the display image information storage area in the transmission data holding unit 113. (S1403). XY coordinates indicating the display position of the cursor figure are calculated (S
1404). Hot spot information is generated from the calculated XY coordinates and the attribute values secured in the tag storage area, and is additionally stored in the link information storage area of the transmission data holding unit 113 (S1405). The link flag in the work area is reset, and the character strings in the tag storage area and the character string storage area are deleted (S1406).

The audio information file is extracted, and the audio information in the file is converted into a predetermined format and stored in the audio information storage area (S1407). A process corresponding to the read tag is performed (S1408). (Description of Configuration of Data Receiving Apparatus 150) Hereinafter, each configuration of the data receiving apparatus 150 will be described with reference to FIGS. (Configuration of Reception Separation Unit 151) The reception separation unit 151 includes a reading buffer 161 for reading an identification number given to transmission data. Read buffer 161
Is display image information (including audio information) for one file
And link information for one file, respectively.

The reception separating section 151 separates display image information (including audio information) and link information from the received transmission data, and separates the display image information (including audio information) for one file and one file. The link information is stored in the corresponding storage area in the read buffer 161. With respect to the display image information stored in the storage area, the identification number is read by character-recognizing the image written at a certain position in the non-display area of the display image information. The link information stored in the storage area is read in the same manner as reading an identification number attached to a general digital data file. If the read identification number is the identification number instructed by the control unit 155, the display image information (including the audio information) or the link information held in the reading buffer 161 is stored in the reception data holding unit 152. Store in the corresponding storage area. At this time, for the audio information, the reception separation unit 151 stores the display image information and simultaneously stores the audio information in the corresponding storage area in the reception data holding unit 152, and further stores the same audio information as the identification number specified by the control unit 155. While the display image information of the identification number is continuously transmitted, the audio information is accumulated. As a result, audio information transmitted over a plurality of frames is separated.

If the read identification number is not the identification number specified by the control unit 155, the read buffer 161
The display image information (including the audio information) or the link information is discarded and the new display image information (including the audio information) and the link information are read until the identification number designated by the control unit 155 is read. And read buffer 161
And repeat the above process. (Reception data holding unit 152, playback unit 153, display unit 15
4) The reception data holding unit 152 is
Display image information (including audio information) separated by 1
And the link information are stored in association with each other by the identification number.
The area for storing the display image information is realized by, for example, a RAM or a hard disk device for storing a still image of one screen.

The reproduction section 153 reproduces the display image information stored in the reception data holding section 152 and the graphic information to be described later inputted from the control section 155 according to the instruction of the control section 155, and outputs the display section 154. Output to Also, in synchronization with the reproduction of the display image information, the audio information stored together with the display image information is reproduced and output to the audio output unit 157.

The display unit 154 is realized by a TV monitor or the like for displaying an image according to the NTSC system or the like.
In accordance with the input from 53, the display image and the cursor graphic are displayed on the screen. (Configuration of Control Unit 155) The control unit 155 first sets an initial value in a register for storing a variable value, and for example, an identification number “0001” corresponding to the page indicated by the initial value.
The reception separation unit 151 is instructed to take in the display image information (including the audio information) and the link information.

Control unit 155 includes reception data holding unit 152
Every time new display image information (including audio information) is stored in the reproduction data storage unit 152, the reproduction unit 153 instructs the reproduction unit 153 to reproduce the display image information (including audio information). Each time the link information is interpreted, a cursor figure correspondence table is created in which each cursor display position is associated with a cursor figure described later. Note that the cursor graphic is represented by graphic information internally held by the control unit 155. Further, the control unit 155 reproduces the graphic information representing the cursor graphic and the display position thereof with the reproduction unit 153.
And instructs to reproduce the graphic information.

FIG. 16 is an explanatory diagram showing an example of a cursor figure correspondence table created by the control unit 155 to control the display position of the cursor figure. Cursor figure correspondence table,
Each cursor display position indicated by the hot spot information of the link information held in the reception data holding unit 152;
The correspondence with the cursor number of the cursor figure to be displayed at the display position is shown. The control unit 155 assigns a cursor number to each cursor display position in the link information, for example, in ascending order of the Y coordinate, and then in ascending order of the X coordinate,
The display position is written to the item corresponding to the cursor number in the cursor graphic correspondence table.

FIG. 17 is an explanatory diagram showing an example of the graphic information held by the control unit 155. As shown in FIG. 17, the control unit 155 holds, in association with each cursor number, graphic information representing a cursor graphic when the cursor is selected and a cursor graphic when the cursor is not selected. I have. Further, the control unit 155 includes a signal receiving unit 156.
In response to the interrupt from the CPU, the type of the input signal held by the signal receiving unit 156 is interpreted, graphic information of the corresponding cursor graphic is selected, and output to the reproducing unit 153. Next, the capture of transmission data by the reception separation unit 151 is controlled in accordance with the selected cursor. (Display Control Processing of Received Data) In the following, linking the display image information (including the audio information) having the same identification number stored in the corresponding storage area in the received data holding unit 152 by the reception separating unit 151 The set of information is referred to as reception data, and the display control processing of the reception data by the control unit 155 will be described more specifically.

Control unit 155 sets variable P-Index indicating the identification number of the received data to be displayed to a predetermined value, for example, “1”. Next, the variable Cur-Pos indicating the cursor number in the selected state is set to a predetermined value, for example, “1”. Control unit 155
Instructs the reception separation section 151 to take in the transmission data indicated by the variable P-Index. Further, by interpreting the link information of the received data which is taken in according to the instruction and stored in the received data holding unit 152, the variable Cur-Pos
The graphic information of each cursor in which the cursor indicated by is selected is output to the reproducing unit 153 together with the corresponding display position. Next, when an interrupt from the signal receiving unit 156 occurs, the input signal held in the signal receiving unit 156 is interpreted. First, check if the input is “up” and “up”
If so, the value of the variable Cur-Pos is reduced by one. Check whether the input is “down”, and if it is “down”, the variable Cur
Increase the value of Pos by one. It is checked whether the input is "confirmed", and if it is "confirmed", the coordinates of the display position are obtained from the cursor number indicated by the variable Cur-Pos, and the file of the link destination described in the hot spot information is obtained from the coordinates. Get the identification number of Further, the identification number is stored in a variable P
The value is set to the value of -Index, and the reception separation unit 151 is instructed to take in the transmission data indicated by the variable P-Index. (Configuration of Signal Receiving Unit 156 and Audio Output Unit 157) Upon receiving an input signal from an external remote controller (not shown), the signal receiving unit 156 generates an interrupt to the control unit 155 due to the reception of the input signal, and receives the received input signal. Hold the signal.

The audio output section 157 is realized by a speaker or the like, and outputs reproduced audio information as audio. (Example of Display Image) FIG. 18 shows the transmission data 800 of FIG.
FIG. 14 is an explanatory diagram showing a display image 1800 of an initial screen displayed on the display unit 154 based on FIG.

As shown in FIG. 18, according to the hot spot information shown in the row 812 of the link information 803, the display image 1800 has the display position (100, 600) in the display image represented by the display image information 801. , A cursor figure 1801 corresponding to the cursor number “1” is displayed. Note that graphic information indicating a selected state is selected as the cursor graphic 1801 according to the initial value of the variable Cur-Pos of the control unit 155.

Similarly, according to the hot spot information shown in the row 813 of the link information 803, the display position (100, 7
00), a cursor figure 1802 corresponding to the cursor number “2” is displayed. Note that the cursor number "2"
Is not the initial value of the variable Cur-Pos, the graphic information indicating the non-selected state is selected as the cursor graphic 1802.

Since the transmission data 800 includes the audio information 802 together with the display image information 801,
A display image 1800 is displayed on the display unit 154, and a “voice description” by voice is output from the voice output unit 157. FIG. 19 shows a display image 190 of an initial screen displayed on display unit 154 based on transmission data 900 of FIG.
It is explanatory drawing which shows 0.

As in the case of the display image 1800 shown in FIG.
The display image 1900 has the display image information 901 according to the hot spot information shown in the row 912 of the link information 902.
Display position (050, 40) in the display image represented by
0), the cursor figure 1 corresponding to the cursor number "1"
901 is displayed. Graphic information indicating a selected state is selected as the cursor graphic 1901.

FIG. 20 is an explanatory diagram showing a display image 2000 of the initial screen displayed on the display unit 154 based on the transmission data 1000 of FIG. Similarly, the display image 200
0, according to the hot spot information shown in the row 1012 of the link information 1002, at the display position (050, 400) in the display image represented by the display image information 1001,
A cursor graphic 2001 indicating the selected state is displayed corresponding to the cursor number "1". (Specific Example of Processing of Control Unit 155) Hereinafter, a processing procedure of the control unit 155 when displaying the display image 1800 on the display unit 154 based on the transmission data 800 will be specifically described.

The control unit 155 first sets the variable P-Inde
The initial value of x is set to “0001”, and the initial value of the variable Cur-Pos is set to “1”. Then, the variable P-Index
Is instructed to fetch the display image information 801 (including the audio information 802) and the link information 803 of the identification number “0001” represented by. The control unit 155 controls the display image information 8 stored in the reception data holding unit 152.
01 (including the audio information 802) is reproduced by the reproduction unit 153.
To instruct. The reproduction unit 153 reproduces the display image information 801 of the first page and outputs the display image information 801 to the display unit 154.
The audio information 802 is reproduced and output to the audio output unit 157. The control unit 155 interprets the link information 803 stored in the received data holding unit 152, creates a cursor graphic correspondence table, and outputs the graphic information of each cursor and its display position to the reproducing unit 153. At this time, the variable Cur-P
The cursor indicated by os, that is, the first cursor is set to the selected image.

Control unit 155 waits for an input from signal receiving unit 156. Signal receiving unit 156 from an external remote controller or the like
In this case, it is assumed that the "down" signal is input. Input signal is "Lower"
If so, the control unit 155 sets the value of the variable Cur-Pos to 1
increase. That is, the value of the variable Cur-Pos is set to “2”. Next, the graphic with the cursor number “2” indicated by the new variable Cur-Pos is set as the graphic information of the selected state,
Cursor number "1" indicated by the original variable Cur-Pos
Are output to the reproduction unit 153 as graphic information in a non-selected state.

The control unit 155 waits for an interrupt from the signal receiving unit 156, and after the occurrence of the interrupt, the signal receiving unit 156.
In this case, it is assumed that an input signal indicating “determined” is held.
If the input signal is “determined”, the control unit 155
The XY coordinates (100, 700) associated with the cursor number “2” indicated by ur-Pos are read from the cursor graphic correspondence table. Next, the read XY coordinates (10
0, 700), the identification number “0003” of the link destination file of the hot spot information in the row 813 is read, and the identification number “000” of the read link destination file is read.
3 ”is obtained. The obtained identification number “0003” is stored in the variable P−
Set as the value of Index. Then, the variable P-In
display image information 100 having an identification number indicated by dex
1 and link information 1002 are fetched by the reception separation unit 15
Instruct 1 The control unit 155 initializes the value of the variable Cur-Pos to “1”.

Thereafter, by performing the same processing as described above, the display image 2000 shown in FIG. 20 can be displayed on the display unit 154. When the value of the variable Cur-Pos is “1”, an interrupt occurs. When the control unit 155 refers to the signal receiving unit 156 due to the interrupt, the signal receiving unit 156 holds an input signal indicating “determined”. In such a case, the control unit 155 can cause the display unit 154 to display the display image 1900 shown in FIG. (Procedure of Display Control Process) FIG. 21 is a flowchart showing an example of the procedure of the display control process of the control unit 155.

The control section 155 sets a variable P-Index indicating the identification number of the transmission data to be captured to an initial value (S2101). The control unit 155 sets a variable Cur indicating the cursor number of the selected state on the initial screen of each display image.
-Pos is set to an initial value (S2102). Control unit 1
Reference numeral 55 instructs the reception separation unit 151 to take in the transmission data having the identification number of the variable P-Index. The reception separation unit 151 separates display image information and link information from the received transmission data according to an instruction from the control unit 155,
The corresponding display image information and link information are stored in the reception data holding unit 152 in association with the identification number (S2).
103).

The reproducing section 153 reproduces the display image information in the received data holding section 152 and outputs it to the display section 154 according to an instruction from the control section 155. If there is audio information associated with the display image information, the audio information is reproduced and output to the audio output unit 157 (step S2104). The control unit 155 interprets the link information in the received data holding unit 152, outputs the graphic information representing the cursor graphic together with the XY coordinates indicating the display position to the reproducing unit 153, and instructs the reproduction of the graphic information. I do. The playback unit 153 includes the control unit 1
The graphic information input from 55 is reproduced and the display unit 154 reproduces the graphic information.
(S2105). Thereby, the display unit 154
Displays a display image of one screen.

The control unit 155 waits for an interrupt from the signal receiving unit 156 (S2106). When an interrupt occurs, the control unit 155 checks whether the input signal held in the signal receiving unit 156 is "up" (S2106). S2107). If it is "up", "1" is subtracted from the value of the variable Cur-Pos (S2
108), if not “up”, it is checked whether it is “down” (S2109).

If it is "lower", "1" is added to the value of the variable Cur-Pos (S2110).
Further, it is checked whether it is "determined" (step S2111). If "confirmed", the variable C at that time
According to the value of ur-Pos, each value is obtained in the order of the cursor number → the cursor display position (X, Y) of the cursor graphic correspondence table → the identification number of the link destination file in the hot spot information. -Set to the value of Index. Thereafter, the process returns to S2102. If not "determined", the flow returns to S2106.

As described above, according to the present embodiment, the display image information to be generated while interpreting the control information on the data receiving device 150 side in advance should be stored on the data transmitting device 110 side in advance. Since the data is generated and transmitted, the load on the data receiving device 150 can be reduced. Also, compared to the large number of types of display control processing for display character strings described in the control information and the large number of processings, the type of control processing using link information is relatively limited. The number of processes is small. Therefore, the data receiving device 1
50 can easily perform pseudo two-way communication with the data transmission device 110 using such link information.

Also, according to the present embodiment, when displaying a WWW homepage on the Internet, data communication system 100 performs pseudo two-way communication using one-to-many TV broadcasting. In this case, a desired page can be promptly displayed on the display unit 154 without being affected by the state of the transmission path, as compared with the case where the display is performed using. Further, since the display image information represented in the TV format in advance is used, a full-color, high-resolution display image can be easily displayed on the display unit 154. Also, the display image generated by the browser is displayed on a TV.
In the case of displaying on the TV, the configuration originally provided in the TV, such as the reproduction processing of the display image, was not sufficiently used.
In the present embodiment, the pseudo two-way communication can be performed by effectively using a memory, a decoder, and the like originally provided in the TV.

In the present embodiment, as examples of information to be acquired, an HTML document used in the WWW, compressed image information in GIF format and audio information in AU format associated with the HTML document have been described. The information may be described in another format or language. In this case, the processing related to the <A> tag may be changed by a method corresponding to the format and the language. Further, in the present embodiment, an example of conversion of an HTML document including only a limited tag has been described, but another tag may be included.

In the present embodiment, the process of displaying another screen has been described as an example of the control of the pseudo two-way communication based on the link information. For example, a process for causing a device to be operated or scrolling a screen, a process for starting or operating a device such as a facsimile, a telephone, or a video connected to the data receiving device may be described.

In the data communication system 100, the transmission data generation unit 112 describes the file in the link information with the identification number, but need not always describe the file with the identification number. For example, the identification number of the file in the link information may be described by the original file name. In this case, at the time of transmission, display image information (including audio information) and link information of each transmission data are attached with an identification number and transmitted.
The data receiving apparatus 150 that receives this may sequentially fetch one cycle of link information in advance and check the correspondence between the file name and the identification number at startup.

Further, data receiving apparatus 150 may store, in received data holding section 152, display image information and link information of the entire cycle repeatedly transmitted from data transmitting apparatus 110. Further, the transport stream shown in FIG.
, The data receiving apparatus 150 first separates / acquires the PMT by the reception separating unit 151, reads out the PID of the display image information to be captured from the PMT, and uses the PID as a filter condition from the transport stream as a display image. What is necessary is just to separate and acquire information. For the link information, the table ID of the private section carrying the link information may be read from the PMT, and the link information may be separated and obtained from the transport stream using the table ID and the identification number as filter conditions.

In the transport stream shown in FIG. 12, the video elementary stream is composed of I pictures, but may be a video elementary stream including P pictures and B pictures. The display image information is encoded according to the MPEG2 standard.
Other formats such as a G format and a GIF format may be used. further,
Although the display image information and the audio information are a video elementary stream and an audio elementary stream, they may be multiplexed in a private section format like the link information. (Embodiment 2) FIG. 22 is a configuration diagram of Embodiment 2 of a data converter of a data communication system according to the present invention. Since the configuration of the entire data communication system is not different from that of the first embodiment, a description thereof will be omitted, and only a portion related to the present embodiment will be described.

The data conversion device includes an information acquisition unit 2201
, A data conversion table storage unit 2202, an output device information storage unit 2203, a document temporary storage unit 2204, a control unit 2205, an image information generation unit 2206, a link information generation unit 2207, and a generation information temporary storage unit 2208. And This data conversion device corresponds to the information acquisition unit 111 and the transmission data generation unit 112 according to the first embodiment. The information acquisition unit 2201 is an external database, and the control unit 2205 is a transmission data holding unit 113. And are connected respectively.

[0118] The information acquisition unit 2201 includes a buffer,
Get multimedia data from an external database and keep it. This multimedia data is shown in FIG.
HTML (Hyper Text) as shown in FIG.
Document 2 described in Markup Language)
301, 2401, etc., and image information 2 as shown in FIG.
501. Note that the image information 2501 is G
It is compressed in IF format.

Documents 2301, 2401, image information 250
Since the contents of 1 are almost described in the first embodiment, the description is omitted. This document 2301 and image information 250
1 and 2 are displayed on a display screen 2601 having a resolution of 640 × 480 dots by a conventionally used WWW browser, as shown in FIGS. 26 and 27. Document 230
Reference numeral 1 denotes a reproduced image 260 over two display screens 2601.
2, 2701 are displayed. This reproduced image 260
Reference numeral 2270 denotes a continuous image.
By specifying scroll bars 2603 and 2604 provided at the upper right end and the lower end on the right side of the
2, 2701 can be moved up and down.

The data conversion table storage section 2202 stores a data conversion table for converting the multimedia document read from the information acquisition section 2201 into information to be stored in the transmission data holding section 113 of the first embodiment. . This data conversion table includes a tag table (not shown), a font table 2801 shown in FIG. 28, and a ring information conversion table 2901 shown in FIG.

In the tag table, the HTM shown in FIG.
Information for interpreting tags such as the document 2301 described in L is recorded. The contents are described in the first embodiment.
2 and FIG. 4 have already been described, and a description thereof will be omitted. The font table 2801 includes the coordinates of the display start position 2803 of the character string associated with the tag 2802 included in the document 2301 and the font size 2804 for displaying the character string. These x, y coordinates and font size are expressed in pixel units (dots) corresponding to the number of pixels.

Note that the <CENTER> tag means that the display position is shifted in a conventional browser, but in the present embodiment, image information is displayed using display screens having different aspect ratios. , The x coordinate of the display start position is designated as 20 (dot). The ring information conversion table 2901 has conversion information for generating link information that is reproduction control information at the time of reproducing the document 2301 or the like. The conversion information 2902 indicates that the “file name” of the document 2301 is to be converted to “Index“ file name ””. When the file extends over two or more screens, a number that distinguishes it from the first screen is attached to the second and subsequent screens in the file name.

The conversion information 2903 indicates that the “file name” of the link destination in the <A> tag is to be converted to “HotSpot (M“ file name ”)”. Where M is
It is a number given at the time of conversion. Output device information storage unit 2
Reference numeral 203 stores the number of pixels of the display unit 154 of the data receiving device 150 of the data communication system 100. That is,
The number of pixels XMAX in the horizontal direction of the display screen and the number of pixels YMAX in the vertical direction are stored. For example, XMAX = 8
53, YMAX = 480.

The document temporary storage unit 2204 stores the information acquisition unit 2
One document and one image information among the documents held in 201 are stored. For example, document 2 shown in FIG.
301 and the image information 2501 shown in FIG. 25 are stored. Upon receiving a reproduction information generation instruction from the outside, the control unit 2205 reads out one document held in the information acquisition unit 2201, stores the read document in the document temporary storage unit 2204, and simultaneously stores the image information generation unit 2206 and the link information generation unit. 2207 is started. When receiving a write instruction from the image information generation unit 2206 to the transmission data holding unit 113, the image information stored in the image information storage area of the generation information temporary storage unit 2208 is read and written to the display image information storage unit 123. The link information stored in the link information storage area is read and written to the link information storage unit 125. At this time, the same identifier is assigned to the written image information and the link information so that the two pieces of information are recognized as a set. When the writing is completed, the generation information temporary storage unit 2208 is initialized, and the image information generation unit 22 is initialized.
06 and the link information generation unit 2207 are notified of the end of writing.

Also, when the image information generation unit 2206 instructs to take in the designated image information file into the document temporary storage unit 2204, the image information stored in the information acquisition unit 2201 is read and the document temporary storage is performed. Part 220
4 is stored. The image information generation unit 2206 includes the control unit 2
When activated in 205, an image information storage area in which the number of pixels XMAX and YMAX of the output device stored in the output device information storage unit 2203 is read, and image information for one screen is stored in the generated information temporary storage unit 2208. Is secured, and a link information storage area paired with the image information area is secured. Upon receiving the write completion notification from the control unit 2205, the image information storage area and the link information storage area are secured in the same manner as described above.

When the image information storage area is secured in the image information temporary storage section 2208, the tag table (not shown) and the font table 2801 stored in the data conversion table storage section 2202 are read out, and the document temporary storage section is read. The character string and image information which are elements in the document stored in 2204 are converted into image information at the time of reproduction. The conversion to the image information has been described in the transmission data generation unit 112 according to the first embodiment, and will not be described here.

At this time, the x and y coordinates of the lower right position of the arrangement of the converted image information are calculated, and by the following calculation,
It is determined whether there is a margin on the display screen, and if there is a margin, the converted image information is stored in the image information storage area of the image information temporary storage unit 2208. Here, the margin refers to a portion where nothing has been written yet in the image information storage area (display screen), and a portion where image information to be written next is written.

The image information generator 2206 substitutes “0, 0” for the variables X, Y and the variables Xmax, Ymax, respectively. These Xmax and Ymax are the maximum x, y coordinates (right end and lower end of the area) of the image information storage area in which the image information is arranged up to a certain point in time. The x and y coordinates are defined such that the upper left end of the display screen is the origin (0, 0) and the horizontal direction is x.
The axis and the vertical direction are the y axis.

The character string indicated to be displayed by each tag is converted into image information based on the font table 2801, and the size (Xs, Ys) of the image information is calculated.
For example, in the case of the character string “weather forecast” 2302 in FIG. 23, Xs = 10 + 80 × 4 =
330, Ys = 10 + 80 = 90, and in the case of the character string “Tomorrow will be cheerful throughout the country” 2303, Xs = 10 + 30 × 20 = 610 and Ys = 60.

If the value obtained by adding the variable Y to the calculated variable Ys is equal to or smaller than the number of pixels YMAX, the image information is written to the X and Y positions of the image information storage area. Next, the variable Xmax
Is compared with the sum of the variable X and the variable Xs. If Xmax is smaller than the sum of the variable X and the variable Xs, the sum of the variable X and the variable Xs is substituted into Xmax, and the variable Y and the variable Y are substituted. Variable Ys
Then, the next character string or image information is converted into reproduced image information. If Xmax is equal to or greater than the sum of the variable X and the variable Xs, the next playback image information is converted by substituting the sum of the variable Y and the variable Ys for the variable Y.

When the value obtained by adding the variable Y to the calculated variable Ys exceeds the number of pixels YMAX, the variable Y is set to the variable Ymax.
After substituting the variable Xmax for the variable X, the value of the number of pixels XMAX is compared with the value obtained by adding the variable Xs to the variable X. When the value of the number of pixels XMAX is equal to or greater than the value obtained by adding the variable Xs to the variable X, the converted image information is written to the X and Y positions of the image information storage area. The X and Y positions are positions corresponding to the right side of the display screen in the image information storage area. Next, it is determined whether or not the number of pixels XMAX matches the sum of the variable X and the variable Xs.
Is substituted for the variable Y and the variable Ys, and the same value is substituted for the variable Y to convert the next image information. If they do not match, the value obtained by adding the variable X and the variable Xs to the variable Xmax and the value obtained by adding the variable Y and the variable Ys to the variable Y are substituted for the next image information.

If the value of the number of pixels XMAX is less than the value obtained by adding the variable X and the variable Xs, it is determined that there is no margin on the display screen, and the control unit 2205 stores the image stored in the generated information temporary storage unit 2208. It instructs to write the information and the link information paired with the image information in the transmission data holding unit 113 (see FIG. 1). Note that the image information generation unit 2206 sets the <
When the contents of the IMG> tag 2304 are read, the control unit 2205 sends the image information file “Weather.gi
f ”into the temporary document storage unit 2204.

The image information generation unit 2206 also stores the <A> tag 2305 stored in the document temporary storage unit 2204.
When such information is read out, the contents (link destination file name) are notified to the link information generation unit 2207. When the notification of the value of the counter M is received from the link information generation unit 2207, the value of M is converted into image information, and the read character string is written before the converted image information.

The link information generation unit 2207 includes the control unit 22
05, the data conversion table storage unit 220
2 according to the link information conversion table 2901 of “2”, the “file name” of the document stored in the temporary document storage unit 2204.
For example, “Report.html” is read and “I
ndex ("Report.html")
The data is written into the link information storage area prepared in the generated information temporary storage unit 2208, and the counter N is set to “0”. Upon receiving the write completion notification from the control unit 2205, “1” is added to the counter N. The value of the counter N is "0"
In other cases, the link information “Index (“ Report
tN. html ")".

When the value of the counter N is set or changed, the counter M is set to "1". Upon receiving notification of the content of the <A> tag 2305 and the like from the image information generation unit 2206, the value of the counter M is changed to the image information generation unit 220.
6, and generates link information according to the conversion information 2903 of the link information conversion table 2901, and writes the link information in the link information storage area of the generated information temporary storage unit 2208.
"1" is added to the counter M. Note that the value of the counter M is given to M before the file name in the link information.

The generated information temporary storage unit 2208 temporarily stores the image information and the link information generated by the image information generating unit 2206 and the link information generating unit 2207. FIG.
Is a document 2301 described in HTML shown in FIG.
The image information 3001 and the link information 3002 for one screen, which are generated first from FIG. FIG. 31 shows the image information 3 generated from the document 2301 in FIG.
101 and link information 3102 are shown.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, when the control unit 2205 receives an image generation instruction from outside, the image information generation unit 2
206, a new image information storage area corresponding to the output screen is newly created in the generation information temporary storage unit 2208 (S320).
2). Subsequently, the image information generation unit 2206 determines the variables X,
Each of Y, Xmax, and Ymax is set to “0”, and the number of pixels in the X direction and the number of pixels in the Y direction of the output device stored in the output device information storage unit 2203 are set to a constant X.
MAX and YMAX respectively (S320
4).

Next, when there is an unanalyzed HTML document stored in the document temporary storage unit 2204, the link information generation unit 2207 and the image information generation unit 3302 (S32
06), the HTML document is analyzed to generate link information and image information (S3208). If there is no unparsed HTML document (S3206), the control unit 2205 reads out the image information and the link information stored in the generation information temporary storage unit 2208, and sets them as a transmission data holding unit 113.
And the process is terminated.

The image information generation unit 2206 substitutes the size of the generated image information in the X direction into a variable Xs and the size in the Y direction into a variable Ys (S3210). YM
It is determined whether or not AX <Y + Ys (S3212), and if negative, the generated image information is arranged at the coordinates (X, Y). That is, the image information storage area is written as it is without moving it to the right (S3214). Xma
It is determined whether or not x <X + Xs (S3216), and if affirmative, X + Xs is substituted for a variable Xmax (S3218),
Y + Ys is substituted for the variable Y (S3220), and S3206
Return to If the determination in S3216 is negative, S322
Move to 0.

If the determination in S3212 is affirmative, the image information generation unit 2206 sets the variable Y to the variable Ymax and the variable X
Is substituted for the variable Xmax (S3222), and XM
It is determined whether or not AX <X + Xs (S3224). If the determination is affirmative, there is no margin for writing the generated image information in the image information storage area.
Reads out the image information and link information that have already been stored and writes them in the transmission data holding unit 113,
Return to 2. If the determination is negative, the image information generation unit 2
206 writes the generated image information to the right coordinates (X, Y) of the already written image information (S322).
6).

Next, the image information generating unit 2206
It is determined whether or not X = X + Xs (S228), and if affirmative, Y + Ys is substituted for a variable Ymax (S323).
0), and proceed to S3220. When the judgment is negative, S321
Move to 8. (Embodiment 3) FIG. 33 is a configuration diagram of Embodiment 3 of a data converter of a data communication system according to the present invention. This data converter includes a reduction limit storage unit 3301 in addition to the configuration of the second embodiment, and an image information generation unit 3
In addition to the function of the image information generation unit 2206 according to the second embodiment, an image reduction function is added to 302. Therefore,
Only the components unique to the present embodiment will be described.

[0142] The reduction limit storage unit 3301 stores the information acquisition unit 2
The maximum reduction ratio when the image information in the multimedia data held by 201 is converted to the image information at the time of reproduction is stored in advance. For example, if this reduction rate is 1
0%. When an image is generated from the image information “Weather.gif” compressed in the GIF format in the above embodiment according to the GIF compression / decompression algorithm, the size of the image shown in FIG. 25 is 400 × 300 dots (horizontal × vertical, unit is pixel Number). Therefore, it can be displayed as it is on one screen of the display unit 154.

FIG. 34 shows the <IMG> of FIG. 23 in this embodiment.
File name of tag 2204 "Weather.gif"
Is an image 3401 generated according to a GIF compression / decompression algorithm. The size of this image 3401 is 60
0 × 900 dots. Using a conventional browser, this is displayed on a display screen 3501 having 640 × 480 dots as shown in FIG. This image 3401
Does not fit on one screen, so scroll bar 350
In the case of a personal computer screen provided with 2, 3503, the entire image can be easily viewed by specifying the upper scroll bar 3502.

However, on a display screen of a television receiver having no scroll function, if an image is divided, the entire image cannot be seen, so that it is difficult to recognize the image. The image information generation unit 3302 determines whether there is a blank space for displaying the image 3401 as it is, and when it determines that there is no blank space, stores the image 3401 in the reduction limit storage unit 3301 so as to match the blank space. The image is reduced in the range of the reduction ratio and written in the image information storage area.

That is, as shown in FIG. 36, when the character string “weather forecast” 2302 is written in the image information storage area, the variables X = 0 and Y = 90. Image information generator 330
2 means that the size of the image 3401 is Xs = 620, Ys = 9
00, and when YMAX = 480,
It is determined whether or not YMAX <Y + Ys. Since it is affirmative, it is determined that there is no margin.

At this time, the image information generation section 3302 calculates a reduction ratio k = (YMAX−Y) × 100 / Ys, and
(480−90) × 100/900 = 43.3 is obtained.
The value of this reduction rate k is compared with the maximum reduction rate 10 stored in the reduction limit storage unit 3301, and since it is larger than the maximum reduction rate, reduction is possible. Further, the reduction ratio k is converted into an integer, for example, k = 40, and the image 3401 is reduced.

In this case, an image 3601 in which three pixels are thinned out of five pixels in the vertical and horizontal directions may be generated, or the pixel values adjacent to each other are averaged to reduce the number of pixels to 40%. As shown in FIG. 36, an image 3601 is generated, and the obtained image 3601 is written to the image information storage area 3602 of the generation information temporary storage unit 2208. Image information generation unit 33
02, when the calculated reduction ratio k is smaller than the reduction ratio stored in the minimum storage unit 3301, the image is reduced to the stored reduction ratio, for example, 10%, and the reduced image is generated as generation information. The data is written in the image information storage area 3602 of the temporary storage unit 2208, and the image information storage area 360
The portion of the image that is out of 2 is cut off. The size of the written image is substituted for Xs and Ys, and the truncated (protruding) image portion is written in a blank portion of the image information storage area 3602 or a newly provided image information storage area.

In FIG. 36, since the image 3401 is reduced to the image 3601, the image information storage area 36
Since a blank space has occurred on the right side of 02, the character string "Tomorrow will be cheerful throughout the country tomorrow" 2303 is written in the upper right part. However, since it cannot be accommodated in one line, it is written over two lines. Also, the character string "1 Osaka" ...
"7 Sapporo" is also written in two columns according to the margin.

The link information 3603 generated by the link information generation unit 2207 is the same as the link information 3002 of the second embodiment. Next, an operation specific to the present embodiment will be described with reference to the flowchart in FIG. If the image information generation unit 3302 determines in step S3212 of the second embodiment that the image information is to be written, it is determined whether the image information to be written is image information read from the image information file (S3702). If it is image information, a reduction ratio k of the image is calculated (S3704).
It is determined whether or not the obtained reduction ratio k is within the maximum reduction ratio stored in the reduction limit storage unit 3301 (S37).
06). If affirmative, an image in which the image information of the image information file is reduced is generated (S3708), and the process returns to S3210 of the second embodiment.

When a negative determination is made in S3702, that is,
If the image is a character string image, S3222 of the second embodiment is used.
Move on to If a negative determination is made in S3706, that is, if the image information of the image information file cannot be accommodated in the margin unless the image information is reduced to the limit or more, an image reduced at the maximum reduction rate is generated (S3710), and the image information storage area 3602 is generated. The part that protrudes is cut off and the size of the remaining image is reduced to X
Substitute s and Ys (S3712), and similarly proceed to S3222.

As described above, in this embodiment, the display unit 15
The image of the image information file exceeding the size of the display screen of No. 4 can be displayed on one screen for easy viewing. (Fourth Embodiment) FIG. 22 is a block diagram of a fourth embodiment of the data converter of the data communication system according to the present invention. Since the data converter of the present embodiment has substantially the same configuration as the data converter of the second embodiment, only the parts unique to the present embodiment will be described.

The document temporary storage unit 2204 stores the information
Numeral 201 stores n pieces of multimedia data associated with information (character strings or image information) in one document of the multimedia data. For example, two documents, a document 2401 shown in FIG. 24 and a document 3801 shown in FIG. 38 are stored. When the document 2401 and the document 3801 are displayed on a display screen of a personal computer having an aspect ratio of 4: 3 by a conventional browser, an image 3901 in FIG.
And an image 4001 in FIG. 40 is obtained.

The image information generation unit 2206 writes the document 2401 described in HTML as image information 4102 in the image information storage area 4101 of the generation information temporary storage unit 2208 as shown in FIG. Link information generation unit 22
07 also stores the link information 4104 of the document 2401 in the link information storage area 4103 of the generated information temporary storage unit 2208.
Write.

In the second embodiment, the document temporary storage unit 220
4 stores only one document, the data conversion process has been completed here. However, in this embodiment,
The document 3801 is stored in the document temporary storage unit 2204. Therefore, the image information generation unit 2206 further
The analysis of the unanalyzed HTML document 3801 is continued, and it is determined whether or not there is a blank space in the image information storage area 4101. If there is a blank space, the image information 4105 of the document 3801 is continuously written in the blank space area.

At this time, an <A> tag 3802 indicating the same content as the display character string “3 back” 4106 of the image information 4102 generated from the document 2401 exists in the document 3801. When reading the control information having the same content as the previously converted image information, the image information generation unit 2206 omits generation of the image information of the character string included in the control information,
The link information generation unit 2207 is also notified that generation of link information is unnecessary.

As a result, two documents 2401 and 240 are stored in the image information storage area 4101 of the generated information temporary storage unit 2208.
Image information 4102 and 4105 of 3801 are written respectively, and the link information storage area 4103 stores the document 240
1 link information 4104 and document 3801 link information 4
107 is written. Next, a specific operation of the present embodiment will be described. In S3208 of the second embodiment, when the image information generation unit 2206 reads control information in which the content of the control information, which is the minimum control unit of the HTML document, is the same as the content written in the generation information temporary storage unit 2208,
The imaging is omitted, the link information generation unit 2207 is also notified that generation of link information is unnecessary, and the process returns to S3206.

[0157] Although the display character strings of "1 week weather" 4108 and "4 week weather" 4109 of the image information shown in FIG. 41 are the same, the file name of the link destination is "Osaka week. html ”and“ Tok
yo week. html "", their contents are not the same and will not be omitted. As described above, data created on the premise of a normal display screen having an aspect ratio of 4: 3 can be appropriately displayed on a display screen having an aspect ratio of 16: 9.

Thus, even a person who has not been trained to handle a personal computer can use information on the WWW server on the Internet using a television receiver easily. As described above, the present invention has been described based on the embodiments, but it is needless to say that the present invention is not limited to the above embodiments.

[0159]

As described above, the data conversion apparatus of the present invention converts an original document consisting of character string information and image information described together with a plurality of control statements so as to be displayed on a first display screen into a first document. What is claimed is: 1. A data conversion device for converting a display image into a reproduced image to be displayed on a second display screen different from an aspect ratio of the display screen, wherein the original document obtaining means obtains the original document from outside, and a size of the second display screen is stored. Display screen size storage means, conversion information storage means for storing conversion information for each control sentence when the original document is converted into a reproduced image of the second display screen, and the second display Area storage means having a plurality of storage areas adapted to the size of the screen; character string information and image information read out from the original document acquisition means; Change to image element A non-storage area determining means for determining whether or not there is a non-storage area in the area storage means for writing the reproduction image element converted by the reproduction image conversion means in accordance with the conversion information; A reproduction image element writing means for writing the reproduction image element to the non-storage area when it is determined that there is a storage area determination means;
A new reproduction image element writing means for writing the reproduction image element to another storage area of the area storage means when it is determined that there is no unrecorded area determination means.

With such a configuration, the non-storage area determining means determines whether or not there is a non-storage area (margin) in the storage area of the storage means. Since the margin is written in the element, the margin of the display screen can be effectively used, and an unnatural image is not generated. In the data conversion device, the conversion information includes, for each control sentence, first shaping information and second shaping information for respectively converting character string information and image information described together with the control sentence into reproduced image elements; And a character size at the time of converting the character string information into a reproduced image element. The reproduced image converting means converts a character according to the first shaping information and the character size stored in the conversion information storage means. A character string information conversion unit that converts column information into a reproduced image element; and an image information conversion unit that converts image information into a reproduced image element according to the second shaping information stored in the conversion information storage unit. .

In the data conversion apparatus, the conversion information further includes, for each control statement, a layout start position of the reproduced image element on a display screen, and the unrecorded area determination unit stores the layout position storage information. A calculating unit that calculates the position of the rear end of the reproduced image element on the display screen when the reproduced image elements are sequentially arranged from the arrangement start position stored in the unit; and a Y coordinate of the position calculated by the calculating unit. A Y determination unit for determining whether the value exceeds the Y coordinate value stored in the display screen size storage unit, and writing to the reproduction image element writing unit when the Y determination unit determines that the value does not exceed the Y coordinate value. And a first write instructing unit for instructing the reproduction image element writing unit, wherein the reproduced image element writing unit receives an instruction from the first write instructing unit,
A first writing unit that writes the reproduced image element at the position calculated by the calculation unit;

With this configuration, it is possible to correctly recognize whether or not there is an unstored area in the storage area of the storage unit where the reproduced image element is written. In the data conversion device, the non-storage area determination means may further store the X coordinate value of the position calculated by the calculation section in the display screen size storage means when the Y determination section determines that the area exceeds the value. And a second write instructing unit that instructs the reproduced image element writing unit to write when the X determination unit determines that the value does not exceed the X coordinate value. The reproduction image element writing means further receives an instruction from the second writing instruction unit, and does not overlap a reproduction image element written by the first writing unit in the storage area of the area storage means. A second writing unit is provided for writing a reproduced image element in an area having a large X coordinate value on the display screen.

With such a configuration, for example, a reproduced image element is written in a margin formed on the right side of a screen which is wide in the horizontal direction (X direction), so that the margin of the display screen can be effectively used, and this is unnatural. Generation of an image can be prevented. Further, in the data conversion device, the non-storage area determination unit further includes a third write instruction unit that instructs the new reproduction image element writing unit to write when it is determined that the unexposed area exceeds the X determination unit, The new reproduction image element writing unit changes the arrangement start position, which is the basis of calculation by the calculation unit, to an initial value in another storage area of the area storage unit, and arranges the reproduction image element on the display screen. The position is calculated, and the reproduced image element is written.

With such a configuration, a reproduced image that cannot be accommodated on one screen is generated as another reproduced image. As a result, even on a display screen without a scroll function, all the reproduced images can be viewed by switching the screen.
Further, in the data conversion device, the conversion information further includes a minimum reduction ratio of the reproduced image element converted by the image information conversion unit, and the reproduced image conversion unit further includes the unstored area determination unit When it is determined that there is no reproduced image element, the reproduced image element of the image information includes a reproduced image element reducing unit that generates a reduced image in a range of the size of the unstored area of the storage area, and the reproduced image element writing unit further includes: When the reduction ratio of the reduced image is equal to or greater than the minimum reduction ratio, the first reduced image in which the writing to another area by the new reproduced image element writing unit is prohibited and the reduced image is written to the unstored area A writing unit, when the reduction rate is less than the minimum reduction rate, generates a minimum reduced image obtained by reducing a reproduced image element at the minimum reduction rate, and writes a part of the minimum reduced image in the non-storage area; Remaining part The and a second reduced image writing unit for writing by the new reproduction image element writing means.

With such a configuration, when the reproduced image information that cannot be accommodated in the margin of the display screen is image information, the image information (original image) is reduced at a minimum reduction ratio or more to form one display screen or two screens. So that you can place them
An easy-to-see display screen can be obtained. In the data conversion device, the non-storage area determination unit may further include a reproduction image element writing determination unit that determines whether all the reproduction image elements of one original document have been written by the reproduction image element writing unit. The other original document determining unit that determines whether or not another original document has been obtained by the original document obtaining unit; and the reproduced image element write determining unit determines that all the original documents have been written. An additional non-storage area determining unit that determines whether or not there is a non-storage area for writing a reproduction image element of another original document in the storage area when it is determined that the additional storage area is obtained by the document determination unit; An additional instruction unit is provided for instructing the reproduced image conversion unit to read out character string information and image information of another original document when it is determined that there is a storage area determination unit.

With such a configuration, when there are a plurality of other documents associated with a document, and when these documents can be accommodated in one display screen, they are regarded as one piece of reproduced image information. Available to A data conversion device that achieves the above object is used in a data transmission device of a data communication system that enables pseudo two-way communication using one-way communication between a data transmission device and a plurality of data reception devices. The control sentence includes information for specifying an original document linked to character string information or image information described together with the control sentence, and the character string information or image information When there is another original document linked to the reproduction image, reproduction control information for controlling display switching from a reproduction image of the original document including the character string information or image information to a reproduction image of the other original document is referred to as the reproduction image. Control information generating means for generating a set is provided.

[0167] Since the reproduction control information is generated by such a configuration, this data conversion device is used for a data transmission device of a data communication system that enables pseudo two-way communication using one-way communication. Can be. further,
The data converter further assigns an identifier to one playback image stored in the storage unit, and assigns the same identifier to playback control information generated by the control information generation unit corresponding to the playback image. An identifier assigning means is provided, and the transmitting means of the data transmitting apparatus is configured to repeatedly transmit a predetermined number of reproduced images together with reproduction control information.

With such a configuration, in the data receiving apparatus of the data communication system, switching of the reproduced image is facilitated based on the reproduction control information, and pseudo two-way communication can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data communication system according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an example of an acquisition list stored in an acquisition list storage unit according to the embodiment.

FIG. 3 is an HTML document "Report. Report" describing an example of the first page of the WWW home page of the embodiment. htm
FIG.

FIG. 4 is image information “Weather” which is an example of an image displayed on the first page of the WWW homepage of the embodiment.
r. FIG.

FIG. 5 is an HTML document “Tokyo.HTML” describing an example of the second page of the WWW homepage of the embodiment. htm
FIG.

FIG. 6 shows an HTML document “Osaka. htm
FIG.

FIG. 7 is an explanatory diagram showing an example of a link information table stored in a data conversion table storage unit of the embodiment.

FIG. 8 shows the HTML document and the voice information “Wea” of the above embodiment.
ther. FIG. 10 is an explanatory diagram showing transmission data of the first page of the WWW homepage generated from “au” and image information.

FIG. 9 is a WW generated from the HTML document of the embodiment.
It is explanatory drawing which shows the transmission data of the 2nd page of W homepage.

FIG. 10 is an explanatory diagram showing transmission data of the third page of the WWW homepage generated from the HTML document 601 of the embodiment.

FIG. 11 is an explanatory diagram showing a transmission data transmission method by the transmission unit of the embodiment.

FIG. 12 is an explanatory diagram of a multiplexed stream transmitted when using satellite digital broadcasting by another multiplexing unit of the embodiment.

FIG. 13A is a flowchart showing a schematic processing procedure of the entire data transmitting apparatus of the embodiment. (B) It is a flowchart which shows an example of the procedure of the information acquisition process by the information acquisition part of the said Example.

FIG. 14 is a flowchart illustrating an example of a procedure of transmission data generation processing by a transmission data generation unit according to the embodiment.

FIG. 15 is a flowchart showing a specific example of a part of the processing procedure in S1312 shown in FIG. 14 of the embodiment.

FIG. 16 is an explanatory diagram showing an example of a cursor graphic correspondence table created by the control unit of the embodiment to control the display position of the cursor graphic.

FIG. 17 is an explanatory diagram showing an example of graphic information held by the control unit of the embodiment.

FIG. 18 is an explanatory diagram showing a display image of an initial screen displayed on the display unit based on the transmission data shown in FIG.

FIG. 19 is an explanatory diagram showing a display image of an initial screen displayed on the display unit based on the transmission data shown in FIG. 9 of the embodiment.

FIG. 20 is an explanatory diagram showing a display image of an initial screen displayed on the display unit based on the transmission data shown in FIG. 10 of the embodiment.

FIG. 21 is a flowchart illustrating an example of a procedure of a display control process of a control unit of the embodiment.

FIG. 22 is a data converter according to a second embodiment of the present invention;
FIG.

FIG. 23 is a diagram illustrating an example of a document stored in the information acquisition unit according to the embodiment.

FIG. 24 is a diagram illustrating an example of a document stored in the information acquisition unit according to the embodiment.

FIG. 25 is an explanatory diagram of an example of image information stored in the information acquisition unit of the embodiment.

FIG. 26 is a diagram showing a reproduced image of the document shown in FIG. 23 displayed on a display screen by a conventional WWW browser.

FIG. 27 is a diagram showing a reproduced image of the document shown in FIG. 23 displayed on a display screen by a conventional WWW browser.

FIG. 28 is a diagram showing an example of a font table stored in the data conversion table storage unit of the embodiment.

FIG. 29 is a diagram illustrating an example of a link information conversion table stored in a data conversion table storage unit according to the embodiment.

FIG. 30 is a diagram illustrating an example of converted image information and link information stored in a generation information temporary storage unit according to the embodiment.

FIG. 31 is a diagram illustrating an example of converted image information and link information stored in a generation information temporary storage unit according to the embodiment.

FIG. 32 is a flowchart for explaining the operation of the above embodiment.

FIG. 33 is a data converter according to a third embodiment of the present invention;
FIG.

FIG. 34 is an explanatory diagram of an example of image information stored in the information acquisition unit of the embodiment.

FIG. 35 is a diagram showing a conventional WWW using the image information shown in FIG. 34;
FIG. 6 is a diagram showing a reproduced image displayed on a display screen by the browser of FIG.

FIG. 36 is a diagram illustrating an example of converted image information and link information stored in a generation information temporary storage unit according to the embodiment.

FIG. 37 is a flowchart illustrating an operation unique to the above embodiment.

FIG. 38 is a diagram showing an example of a document stored in a document temporary storage unit of the fourth embodiment of the data conversion device according to the present invention.

FIG. 39 is a diagram showing a reproduced image of the document shown in FIG. 24 displayed on a display screen by a conventional WWW browser.

40 is a diagram showing a reproduced image in which the document shown in FIG. 38 is displayed on a display screen by a conventional WWW browser.

FIG. 41 is a diagram illustrating an example of converted image information and link information stored in a generation information temporary storage unit according to the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 data communication system 110 data transmission device 111 information acquisition unit 112 transmission data generation unit 113 transmission data holding unit 114 transmission data reading unit 115 multiplexing unit 116 transmission unit 121 acquisition list storage unit 122 data conversion table storage unit 123 display image information storage Unit 124 audio information storage unit 125 link information storage unit 150 data reception device 151 reception separation unit 152 reception data holding unit 153 reproduction unit 154 display unit 155 control unit 156 signal reception unit 157 audio output unit 161 read buffer 2201 information acquisition unit 2202 data Conversion table storage unit 2203 Output device information storage unit 2204 Document temporary storage unit 2205 Control unit 2206 Image information generation unit 2207 Link information generation unit 2208 Generation information temporary storage unit 2801 Font table Bull 2901 link information conversion table 3301 reduction limit storage section 3302 image information generation section

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hidekazu Tanigawa 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd.

Claims (17)

[Claims] An original document comprising at least one character string information and at least one image information described together with a plurality of control statements to be displayed on a first display screen is different from an aspect ratio of the first display screen. What is claimed is: 1. A data conversion device for converting a reproduced image to a reproduced image to be displayed on a second display screen, comprising: an original document acquisition unit for acquiring the original document from outside; and a display screen size storage storing a size of the second display screen. Means, conversion information storage means for storing conversion information for each control sentence when converting the original document into a reproduced image of a second display screen, and a plurality of conversion information adapted to the size of the second display screen An area storage unit having a storage area of: a read image conversion unit that reads character string information and image information from the original document acquisition unit, and converts the read character string information and image information into a reproduced image element that is a unit of the reproduced image by referring to the conversion information Means, a non-storage area determining means for determining whether or not there is a non-storage area for writing the reproduced image element converted by the reproduced image converting means in the area storage means in accordance with the conversion information, and the non-storage area determining means When it is determined that there is a reproduction image element writing unit that writes the reproduction image element into the non-storage area, and when it is determined that the non-storage area determination unit does not exist, the reproduction image element is stored in the area storage unit. A new reproduction image element writing means for writing to the storage area. 2. The conversion information includes, for each control sentence, first shaping information and second shaping information for converting character string information and image information described together with the control sentence into reproduced image elements, respectively. And a character size used when converting the character string information into a reproduction image element. The reproduction image conversion unit converts the character string information according to the first shaping information and the character size stored in the conversion information storage unit. A character string information conversion unit that converts the image information into a reproduced image element; and an image information conversion unit that converts the image information into a reproduced image element in accordance with the second shaping information stored in the conversion information storage unit. The data conversion device according to claim 1. 3. The arrangement information further includes, for each control sentence, an arrangement start position of the reproduced image element on a display screen, wherein the unstored area determination unit includes an arrangement stored in the arrangement position storage unit. A calculating unit for calculating a position of a rear end of the reproduced image element on a display screen when the reproduced image elements are sequentially arranged from a head position, and a Y coordinate value of the position calculated by the calculating unit is stored in the display screen size. A Y determining unit for determining whether or not the value exceeds the Y coordinate value stored in the unit; and a first writing instructing the reproduction image element writing unit to write when the Y determining unit determines that the value does not exceed the Y coordinate value. An instruction unit, wherein the reproduced image element writing unit receives the instruction from the first write instruction unit, and writes the reproduced image element at the position calculated by the calculation unit. 3. The method according to claim 2, wherein Data conversion device. 4. The non-storage area judging means, when it is judged by the Y judging section to exceed, the X coordinate value of the position calculated by the calculating section stored in the display screen size storing means. X to determine whether the coordinate value is exceeded
A determination unit; and a second write instructing unit that instructs the reproduction image element writing unit to write when the X determination unit does not exceed the determination unit. In response to an instruction from the second write instructing unit, the reproduced image element is placed in a region of the storage area of the area storage unit having a large X coordinate value on the display screen which does not overlap the reproduced image element written by the first writing unit. 4. The data conversion device according to claim 3, further comprising a second writing unit for writing. 5. The non-storage area determining means has a third write instructing section for instructing the newly reproduced image element writing means to write when it is determined by the X determining section that the data exceeds the limit, The reproduced image element writing means changes the arrangement position of the reproduced image element on the display screen to another storage area of the area storage means by changing an arrangement start position, which is a basis of calculation by the calculation unit, to an initial value. 5. The data conversion apparatus according to claim 4, wherein the calculation is performed and the reproduced image element is written. 6. The conversion information further includes a minimum reduction ratio of a reproduction image element converted by the image information conversion unit, and the reproduction image conversion unit determines that there is no non-storage area determination unit. A reproduced image element reducing unit that generates a reduced image of a reproduced image element of image information in a size range of the unstored area of the storage area, wherein the reproduced image element writing unit has a reduction ratio of the reduced image. A first reduced image writing unit for writing a reduced image to the unstored area by prohibiting writing to another area by the new reproduced image element writing unit when the reduction rate is equal to or greater than the minimum reduction rate; When the rate is less than the minimum reduction rate, a reproduced image element is reduced at the minimum reduction rate to generate a minimum reduced image,
6. The data according to claim 5, further comprising a second reduced image writing unit that writes a part of the minimum reduced image in the unstored area and writes the remaining part by the new reproduced image element writing unit. Conversion device. 7. A reproduction image element writing judgment unit for judging whether or not all reproduction image elements of one original document have been written by said reproduction image element writing means, and In the document acquisition means, another original document determination unit that determines whether or not another original document has been acquired, and it is determined that all the original images have been written by the reproduced image element write determination unit, and the other original document determination unit An additional non-storage area determining unit that determines whether the storage area has a non-storage area for writing a reproduced image element of another original document when the storage area is determined to be acquired; 7. The data conversion apparatus according to claim 6, further comprising an additional instruction unit for instructing the reproduced image conversion means to read out the character string information and image information of another original document when it is determined that there is an image. 8. The data conversion device is used in a data transmission device of a data communication system that enables pseudo two-way communication by using one-way communication between a data transmission device and a plurality of data reception devices. In addition, the control statement includes character string information or information specifying an original document linked to image information linked to the control statement, and is linked to the character string information or image information. When there is another original document, reproduction control information for controlling display switching from a reproduced image of the original document including the character string information or image information to a reproduced image of the other original document is paired with the reproduced image. 8. A control information generating means for generating the control information.
Data conversion device as described. 9. The data conversion device assigns an identifier to one playback image stored in the storage unit, and applies the same playback control information generated by the control information generation unit corresponding to the playback image. 9. The data conversion device according to claim 8, further comprising an identifier assigning unit for assigning an identifier, wherein the transmitting unit of the data transmitting device repeatedly transmits a predetermined number of reproduced images together with reproduction control information. 10. An original document comprising character string information described together with a control statement to be displayed on a first display screen is converted into a reproduced image to be displayed on a second display screen having a different aspect ratio from that of the first display screen. An original document acquisition unit for acquiring the original document from the outside, a display screen size storage unit for storing a size of a second display screen, and a second display screen for storing the original document. Conversion information storage means for storing conversion information for each control statement when converting to a reproduced image of the same type; area storage means having a plurality of storage areas adapted to the size of the second display screen; A reproduction image conversion unit that reads character string information from a document acquisition unit and converts the character string information into a reproduction image element, which is a unit of a reproduction image, with reference to the conversion information; An unstored area determining unit that determines whether there is an unstored area to which the reproduced image element to be written is written in accordance with the conversion information; A reproduction image element writing unit that writes the reproduction image element into another storage area of the area storage unit when it is determined that there is no unstored area determination unit; A data conversion device, characterized in that: 11. The conversion information includes, for each control statement, information for converting character string information described together with the control statement into a reproduced image element, and a character for converting the character string information into a reproduced image element. The reproduction image conversion unit includes a character string information conversion unit that converts character string information into a reproduction image element according to the information and the character size stored in the conversion information storage unit. The data conversion device according to claim 10, wherein 12. The conversion information storage unit further includes, for each control sentence, an arrangement start position on the display screen of the reproduced image element, and the unstored area determination unit stores the arrangement start position in the arrangement position storage unit. A calculation unit that calculates the position of the rear end of the reproduced image element on the display screen when the reproduced image elements are sequentially arranged from the arrangement start position, and the Y coordinate value of the position calculated by the calculation unit is the display screen. A Y determining unit for determining whether or not the Y coordinate value stored in the size storage unit is exceeded; and a first instruction for instructing the reproduced image element writing unit to write when the Y determination unit determines that the value is not exceeded. A writing instruction unit, wherein the reproduction image element writing unit receives an instruction from the first writing instruction unit and writes the reproduction image element at a position calculated by the calculation unit. Characterized by having a recess The data conversion device according to claim 11. 13. The non-storage area determination means, wherein when the Y determination part determines that the value exceeds the value, the X coordinate value of the position calculated by the calculation part is stored in the display screen size storage means. X to determine whether the coordinate value is exceeded
A determination unit; and a second write instructing unit that instructs the reproduction image element writing unit to write when the X determination unit does not exceed the determination unit. In response to an instruction from the second write instructing unit, the reproduced image element is placed in a region of the storage area of the area storage unit having a large X coordinate value on the display screen which does not overlap the reproduced image element written by the first writing unit. 13. The data conversion device according to claim 12, further comprising a second writing unit for writing. 14. The non-storage area determination unit, further comprising: a third write instruction unit for instructing the newly reproduced image element writing unit to write when it is determined by the X determination unit that the area exceeds the value, The reproduced image element writing means changes the arrangement position of the reproduced image element on the display screen to another storage area of the area storage means by changing an arrangement start position, which is a basis of calculation by the calculation unit, to an initial value. 14. The data conversion device according to claim 13, wherein the calculation is performed and the reproduced image element is written. 15. The reproduction image element writing determination unit that determines whether or not all the reproduction image elements of one original image have been written by the reproduction image element writing unit; In the document acquisition means, another original document determination unit that determines whether or not another original document has been acquired, and it is determined that all the original images have been written by the reproduced image element write determination unit, and the other original document determination unit An additional non-storage area determining unit that determines whether the storage area has a non-storage area for writing a reproduced image element of another original document when the storage area is determined to be acquired; 15. The data conversion apparatus according to claim 14, further comprising: an additional instruction unit that instructs the reproduced image conversion unit to read out character string information and image information of another original document when it is determined that there is an image. 16. The data conversion device is used in a data transmission device of a data communication system that enables pseudo two-way communication using one-way communication between a data transmission device and a plurality of data reception devices. In addition, the control statement includes information specifying an original document of a link destination linked to the character string information described together with the control statement, and another original document linked to the character string information is included. A control information generating unit configured to generate, in combination with the reproduced image, reproduction control information for controlling display switching from a reproduced image of the original document including the character string information to a reproduced image of the other original document. The data conversion device according to claim 15, wherein: 17. The data conversion device, wherein an identifier is assigned to one reproduction image stored in the storage unit, and the same reproduction control information is generated by the control information generation unit corresponding to the reproduction image. 17. The data conversion device according to claim 16, further comprising an identifier assigning unit for assigning an identifier, wherein the transmitting unit of the data transmitting device repeatedly transmits a predetermined number of reproduced images together with reproduction control information.