JP3299689B2 - Data converter for data communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a data conversion device used in 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 Internet has been actively used, and effective use of information (homepage) stored in each site on the World Wide Web (WWW) has been attempted. A keyboard and a mouse are used for the display operation of an interactive screen such as this homepage. In particular, selection of a link between pages called a hot spot (designation of a page to be displayed next on the screen) is performed using the keyboard. This is performed by moving the cursor or mouse cursor. As a technique of such an interactive operation, for example, there is a Netscape Navigator of Netscape.

[0003]

In the above-mentioned conventional technology, it is assumed that a computer or a peripheral input device such as a keyboard or a mouse is used as a pointing device. It has not been. Therefore, even if the World Wide Web homepage is displayed on the screen of the television, it is impossible to perform an interactive operation using a remote controller that is difficult to point.

An object of the present invention is to provide a data conversion apparatus for multimedia data which displays a homepage on a television screen and allows easy interactive operation with a remote control attached to the television in view of the above problems.

[0005]

In order to solve the above-mentioned problems, a data conversion apparatus according to the present invention uses a one-way communication from a data transmitting apparatus to a plurality of data receiving apparatuses to perform pseudo two-way communication. A data conversion device used in the data transmission device of a data communication system that enables a part or all of character information or image information of original document information to be linked to another original document information An original document information storage unit in which link destination information is embedded and stores a plurality of original document information including at least one character information and at least one image information, and a list of numbered additional shapes. The additional shape storage means stored in advance, and the character information and image information included in the original document information stored in the original document information storage means are sequentially read out, and the respective character information or each image information is read out. Reproduced image element generation means for generating a reproduced image element which is generated bitmap information, and a reproduced image corresponding to one screen reproduced by the data receiving device from the reproduced image element generated by the reproduced image element generating means And a reproduction image element in the reproduction image generated from character information or image information in which link destination information having another original document information as a link destination is embedded. The additional shape arrangement means for sequentially reading out the additional shapes stored in the additional shape storage means in the order of appearance of the image elements and arranging them in the reproduced image element on the reproduced image, and a link destination of the character information or image information. The link destination information indicating other original document information is converted into playback link destination information indicating another playback image linked to the playback image element corresponding to the number assigned to the additional shape. It is set to be equipped with a reproduction destination information converting means that.

[0006]

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 11
0 and a plurality of data receiving devices 150.

[0007] The data transmission device 110 includes an information acquisition 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, display unit 154, control unit 155, and signal receiving unit 15
6 is provided. (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) for holding information acquired from an external database such as a WWW server.

In the acquisition list storage unit 121, 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 is associated 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.

[0010] 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. If 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.

[0011] The information acquisition section 111 is provided in the acquisition list storage section 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”> represents image information 401 “Weather.gif” shown in FIG. gif ”is included at this position as a display element of the document. The attribute “SRC =” of the tag <IMG> indicates 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 the joy of spring nationwide” surrounded by <P> and </ P> is one paragraph in the text of this document. Represent. <UL> in the line 318 and </ UL> in the line 322 indicate a display element of the document represented by a 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> is one item in the list. Row 319
<A HREF=“Tokyo.html”> Tokyo </A> is obtained from the character string “Tokyo” by using 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 “> audio commentary </A> indicates that a link is provided from the character string“ audio commentary ”to audio information“ Weather.au. ”The character string“ audio commentary ”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, 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, 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. 6 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 4-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 an 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, a sound information storage area, and a link information storage area set to store the display image information, the sound information, and the 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 the 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 generation 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 "
If so, 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 sets the attribute “H” of the tag <A>.
REF = ”, the“ “link destination file” ”has the extension“. au ”or the like. If it is audio information, the audio information is taken out from the acquisition list storage unit 121 and converted into audio information of a predetermined format, and the converted audio information is stored in the audio 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 a region for displaying the cursor is opened from the 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>
= ”Specified in the“ link destination file name ”
Generate hotspot information. At this time, 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 barcode, 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, the character string represented by the 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 a command “GO” at a position represented by coordinate values (100, 700) on the display image information 801.
_TO_PAGE (0003)], which indicates that a 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 on the display image information 901 represented by a coordinate value (050, 400).
_TO_PAGE (0001)], which indicates that a cursor should be displayed at this position.
The instruction “GO_TO_PAGE (0001)” is “00
01 ”is displayed to indicate the page represented by the transmission data 800 having the identification number“ 01 ”.

The transmission data 1000 shown in FIG.
W represents the third page of the home page, and the display 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 them, 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 generator 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, which indicates 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 centered. 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 “gif”> with reference to the tag table.
ther. It checks whether or not the file of the image information 401 represented by “gif” exists in the buffer of the information acquisition unit 111 and reads it because it exists. Then, the image information compressed and stored in the read file 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 line 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 “weather forecast” in line 312, the character string “Tomorrow will be cheerful nationwide will be read” and secured in the character string storage area of the work area. Next, when the tag </ P> is read, the stored character string "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 display image information 801 in FIG. Further, the work area is reset.

Similarly, the transmission data generation unit 112 sets
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, interprets that it is the head of one item by referring to the tag table, 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 into 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 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 = “Tokyo.html”> reads the character string “Tokyo” until the tag </A> appears, and writes 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 storage area for link information 803 in the transmission data holding unit 113. Thereafter, the character string “A H” 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> on 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 generation unit 112
After reading the tag <LI> of No. 21, since the item flag is present, the display position of the display image is broken, 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 fixed 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 itemized list is interpreted, the itemized 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 "
From the index information “<IN
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, a hard disk device, or the like, 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 voice information for 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 there is audio information, the audio information is read from the transmission data file, and the time required for reproducing the audio 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 the audio information) read by the transmission data reading section 114 and the link information, and outputs the multiplexed information to the transmission section 116. As a multiplexing method, for example, a conventional TV broadcast character multiplexing technique is used. 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
The audio data is transmitted in a video section and a retrace section of a television video signal over a plurality of frames required for the reproduction time of the audio data.

The transmission 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, and 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 from the transmission unit 116 at the same time, the timing does not always coincide with the display image information and the link information. 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 is assumed that the broadcast image is transmitted by terrestrial broadcasting, the display image information and the link information need not necessarily be multiplexed and transmitted. For example, the display image information and the audio information may be transmitted by terrestrial TV broadcasting or satellite digital 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 display image information is set to an I picture, and a sound information is And 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 is written in the non-display area in the display image information as described above. 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
The multiplexing is performed 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 an I-value according to 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 link information. A table ID "0xB0" for distinguishing private sections is provided. An identification number is set in the table ID extension for distinction. 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 the identifier 0003 is set for the image area centered on the coordinates (X, Y) = (100, 700).
PAGE (0002)) is set.

Further, 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 PMT, such as 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 stored in the transmission data holding unit 113, respectively. Further, the transport stream in FIG. 12 has a configuration created by the multiplexing unit 115.

When 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 section 114 circulates and reads the transmission data in the transmission data holding section 113 in the order of the identification numbers (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 set to 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 includes the information acquisition unit 1
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 collated 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 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. It is checked whether the tag is a </A> tag (S1401).
If it is not a </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 an audio information file (S140)
2). 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, 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 fixed 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 assigned 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, with respect to 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 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 unit 153 reproduces the display image information stored in the reception data holding unit 152 and the graphic information described later input from the control unit 155 according to the instruction of the control unit 155, and 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.
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. The cursor graphic is represented by graphic information held inside 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.
To instruct the reproduction of the graphic information.

FIG. 16 is an explanatory diagram showing an example of a cursor graphic correspondence table created by the control unit 155 for controlling the display position of the cursor graphic. 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 indicating 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.

The control unit 155 sets a 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 that 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 increased by one. Check whether the input is “down”, and if it is “down”, the variable
-Decrease Pos value 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 unit 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 by 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,
The 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, the display position (050, 400) in the display image represented by the display image information 1001 according to the hot spot information shown in the row 1012 of the link information 1002,
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 take in 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
, The "up" signal is input. Input signal is “up”
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 of 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 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 this 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 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 of 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).

[0104] 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 the instruction of 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
(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 “lower”, “1” is added to the value of the variable Cur-Pos (S 2110).
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, and the obtained identification number is used as a variable P -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 apparatus 150 side in advance should be stored on the data transmitting apparatus 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 by 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 and GIF-format compressed image information and AU-format audio information associated therewith 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 of causing the device to scroll or scroll the screen, a process of 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 by the identification number, but it is not always necessary to describe the file by 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 device 150 that receives this may fetch one cycle of link information in advance at the time of startup, and check the correspondence between the file name and the identification number.

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 in the MPEG2 standard.
Other formats such as G format and GIF format may be used. further,
Although the display image information and the audio information are the video elementary stream and the 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, a cursor shape 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. It has. 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.

Also, in the first embodiment, the cursor graphic is held inside the control unit 155 of the data receiving device 150. However, in the present embodiment, the cursor shape is held in the data receiving device 150 in advance. Without
The transmission unit 116 of the data transmission device 110 including the image information
Will be sent from The information acquisition unit 2201 includes a buffer, acquires multimedia data from an external database, and holds the multimedia data. This multimedia data is expressed in HTML (Hyper) as shown in FIGS.
The document 2301 includes documents 2301 and 2401 described in Text Markup Language, and image information 2501 as shown in FIG. In addition, image information 2
501 is compressed in a GIF format.

Documents 2301, 2401 and image information 250
The content of 1 is almost described in the first embodiment, and the description is omitted. This document 2301 and image information 250
2 is displayed on a display screen 2601 of a personal computer having a screen size of 640 × 480 dots by a conventionally used WWW browser.
As shown in FIG. The document 2301 is displayed on the display screen 260
1 are displayed as reproduced images 2602 and 2701 over two screens. The playback images 2602 and 2701 are continuous images, and the playback images 2602 and 2701 are moved up and down by pointing to scroll bars 2603 and 2604 provided at the upper right and lower ends on the right side of the display screen 2601. can do.

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

The ring information conversion table 2901 has conversion information for generating link information which is reproduction control information when reproducing the document 2301 or the like. Conversion information 2902
Indicates that the “file name” of the document 2301 is to be converted to “Index“ file name ””. Conversion information 2
Reference numeral 903 indicates that the “file name” of the link destination in the <A> tag is converted to “HotSpot (M“ file name ”)”. Here, M is a heading number given at the time of conversion.

The cursor shape storage unit 2203 stores a cursor shape table 3001 as shown in FIG. The cursor shape table 3001 has a heading number 3
002 and a list of cursor shapes 3003. The heading number 3002 is a part of a document 2301 that indicates a link relationship to another document, for example, the document 2401,
It is a number assigned in order from the top of 01. A cursor shape 3003 indicates an image shape to be added to a display image portion indicating a link relationship in the document 2301 when the document 2301 is converted into a display image.
Correspond to the heading number 3002.

The document temporary storage unit 2204 stores the information
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 link information so that the two pieces of information are recognized as a set. When image information for two screens or more is stored in the image information storage area, link information is grouped for each image information.

When the image information generation unit 2206 instructs to take in the specified 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 capable of storing image information for one screen is secured in the generated information temporary storage unit 2208, and a link information storage area that is paired with the image information area is secured.

When an 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.

Further, the image information generation unit 2206 determines that <IM
G> When the contents of the tag 2304 are read, the control unit 2
In 205, the image information file "Weather.gif"
To the document temporary storage unit 2204. When reading the <A> tag 2305 or the like stored in the document temporary storage unit 2204, the image information generation unit 2206 notifies the link information generation unit 2207 of the contents (link destination file name). Upon receiving the notification of the value of the counter M from the link information generation unit 2207, the cursor shape table 30 stored in the cursor shape storage unit 2203
01 cursor number 3002 “M” cursor shape 300
Acquire 3. Next, the placement position (X
(st, Yst). Note that this arrangement position is indicated by the coordinates of the upper left position of the display element. The x-coordinate Xst is the start position x = 1 of the <LI> tag of the font table 2801 that regulates the arrangement of the display element of the <A> tag.
By 0, Xst = 10. The y coordinate Yst is
It is obtained by adding the number of pixels in the Y direction of the display element displayed until the display element of the <A> tag is displayed.

For example, the arrangement position of the character string "Osaka" which is a display element of the <A> tag 2305 in FIG.
And Yst = 10 + 80 + (270) + 60 = 42
0 Here, () indicates the image information “Weather.gi.
f ”is the number of pixels in the Y direction converted into a display image. The size of the image of "Weather.gif"
(360 × 270) dots. That is, the coordinates (10,
420).

The image information generating unit 2206 determines the layout position (X
st, Yst), the acquired cursor shape 30
03 is written at the head of the arrangement position (Xst, Yst) of the image information storage area of the generation information temporary storage unit 2208, and then the character string of the display element is written. Thus, FIG.
When the document 2301 shown in FIG. 3 is converted into image information, FIG.
As shown in FIG. 1, image information 3102 for one screen is obtained in the image information storage area 3101.

Further, the image information generation unit 2206 operates as shown in FIG.
When the image information 3102 for one screen shown in (1) is written in the image information storage area 3101, there is no area to be written next, so a new image information storage area 3201 ( 32 (see FIG. 32). Next, the unparsed document 2301 is analyzed,
The image information is written in the image information storage area 3201.
When the unanalyzed document 2301 runs out, the control unit 2205 is instructed to write.

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 document temporary storage unit 2204.
For example, “Report.html” is read and “I
ndex (“Report.html”) ”and writes it to the link information storage area prepared in the generated information temporary storage unit 2208.

Further, the “file name” of the document is changed to “Inde
x (file name) "
"1" is set to the counter M which becomes 002. Upon receiving notification of the contents 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 2206.
And generates link information according to the conversion information 2903 of the link information conversion table 2901, writes the link information in the link information storage area of the generated information temporary storage unit 2208, and adds "1" to the counter M. Note that the value of the counter M, which is the index number 3002, 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.
1 and FIG. 32 show image information 310 for two screens generated from the document 2301 described in HTML shown in FIG.
FIG. 33 shows link information 3301 common to both image information 3102 and 3202 generated from the document 2301.

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 secures an image information storage area and a link information storage area corresponding to the display screen in the generated information temporary storage unit 2208 (S3402). Next, the link information generation unit 2207
And the image information generation unit 2206 includes a document temporary storage unit 220
4 (S3404), the HTML document is analyzed (S340).
6). If there is no unparsed HTML document (S340
4), the control unit 2205 stores the generated information temporary storage unit 2208
Read the image information and link information stored in the
The data is written into the transmission data holding unit 113 as a set, and the process is terminated.

The image information generation unit 2206 determines whether or not the analyzed document is link information (control information including <A> tag) (S3408). A predetermined cursor shape is obtained (S3410). If it is not link information, the flow shifts to S3412 without acquiring the cursor shape. S341
In 2, the image information generation unit 2206 calculates the arrangement position of the display element included in the document (S3412), and arranges the image information. At this time, if the link element is a display element of the link information, the acquired cursor shape is also written in the arrangement position of the display element, and the link information generating unit 2207 writes the link information in the link information storage area (S3414).
Next, the image information generation unit 2206 determines whether or not there is an area for writing a new display element in the image information storage area (S3416). If there is, the process returns to S3404; otherwise, the generation information temporary storage unit Only an image information storage area is newly secured in 2208 (S3418), and the process returns to S3404. (Embodiment 3) FIG. 35 is a configuration diagram of Embodiment 3 of a data converter of a data communication system according to the present invention. This data conversion device includes an information acquisition unit 2201, a data conversion table storage unit 2202, a cursor shape storage unit 2203, an output device information storage unit 3501, a document temporary storage unit 2204, a control unit 2205, an image information generation unit Unit 3502, a link information generation unit 3503, and a generation information temporary storage unit 2208. The same components as those in the second embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The components unique to the present embodiment will be described.

FIG. 36 shows a remote controller (hereinafter referred to as "remote controller") 3601 for transmitting a signal to signal receiving section 156 described in the first embodiment. The remote controller 3601 can use six keys from a “1” key to a “6” key for cursor designation. The output device information storage unit 3501 stores in advance the maximum number K of cursors (displays for specifying a link destination file) that can be displayed in one screen. The maximum number K of cursors is, for example, “6” because six keys can be used with the remote controller 3601.

When the control unit 2205 writes the image information and the link information into the display image information storage unit 123 and the link information storage unit 125, in addition to the functions of the second embodiment, Generator 350
3 is notified of the end of writing. Image information generator 350
Reference numeral 2 denotes a link information generation unit 3503 that calculates the number of <A> tags included in the document 2301 in addition to the function of the second embodiment.
Is counted by the value of the counter M notified from. FIG.
Of the document 2301 shown in FIG.
If "is converted to a display image, the size is (360 ×
210) When it is a dot, as shown in FIG.
Image information 3701 for one screen is obtained. When the image information for one screen is generated, the control unit 2205 is notified of a write instruction to the transmission data holding unit 113.

Image information generation section 3502 determines whether or not the value of counter M notified from link information generation section 3503 matches the value of K stored in output device information storage section 3501. When the value becomes the value, the cursor shape and the display element are written in the image information storage area of the generated information temporary storage unit 2208, and then the control unit 2205 is notified of a write instruction to the transmission data holding unit 113. In this way, as shown in FIG. 38, image information 3801 in which the number of link information does not exceed the maximum number K stored in the output device information storage unit 3501 is generated.

Further, when the display elements of the document 2301 are imaged, one piece of image information 3901 is generated as shown in FIG. The link information generation unit 3503 sets the counter N to “0” when activated by the control unit 2205 in addition to the functions of the second embodiment. Upon receiving the write completion notification from the control unit 2205, “1” is added to the counter N.
When the value of the counter N is other than “0”, the link information “I
ndex (“ReportN.html”) ”. When the value of the counter N is set or changed, the counter M is set to “1”.

In this way, link information 3702 which is a set of image information 3701, link information 3802 which is a set of image information 3801, and link information 3902 which is a set of image information 3901 are respectively generated. Signal receiving unit 156
If the channel “12” of the display unit 154 is set to the Internet broadcast while a normal television broadcast is being received, when the “12” key 3602 is pressed, the generation information temporary storage shown in FIG. The same image as the image information 3701 stored in the unit 2208 is displayed on the display unit 154. Here, when the “1” key 3603 of the remote controller is pressed, the hot spot “1” Osaka is selected, and the page jumps to the “Osaka Weather” page indicated by the document 2401. To return to the television broadcast channel switching from this screen, use “CH”.
After pressing the key 3604, the "1" to "11" keys are pressed.

Next, the operation specific to the present embodiment will be described with reference to the flowchart in FIG. Image information generator 35
02 secures an image information storage area and a link information storage area corresponding to the display screen in the generated information temporary storage unit 2208 (S4002). Next, the image information generation unit 3502
Unparsed HT stored in the document temporary storage unit 2204
If there is an ML document (S4004), the HTML document is analyzed (S4006). If there is no unanalyzed HTML document (S4004), the control unit 2205 reads out the image information and the link information stored in the generated information temporary storage unit 2208, writes them as a set in the transmission data holding unit 113, and performs processing. To end.

The HTML document analyzed in S4006 is converted into an image and reproduced control information (S4008). The image information generation unit 3502 matches the number of <A> tags in one output screen, that is, the value of the counter M notified from the link information generation unit 3503 with the maximum number K stored in the output device information storage unit 3501. It is determined whether or not to perform (S4010), and when they match, in S4014, the control unit 2205 is notified of an instruction to write the information stored in the generation information temporary storage unit 2208 to the transmission data holding unit 113, and the writing is performed. Upon receiving the end notification from the control unit 2205, a new image information storage area and link information storage area are set, and S4016
Proceed to. If they do not match, it is determined whether or not there is an area in which the generated image information should be written in the image information storage area (S4012). If there is an area, the image information generated in S4016 is written, and the link information generation unit 3503
Writes the link information. Next, the process returns to S4004.

As described above, according to the present embodiment, it is possible to easily designate a hot spot on display portion 154 with external remote controller 3601 and jump to desired page information for viewing. Information and link information can be generated. In this embodiment, the maximum number K of cursors stored in the output device information storage unit 3501 is set to a number that allows cursor designation with the remote controller 3601. However, the maximum number K of cursors is determined based on the display screen of the display unit 154. In consideration of the resolution, the number may be such that the cursor can be specified so that the display screen of the link destination selection is easy to see. (Embodiment 4) This data converter is substantially the same as the configuration of the above-mentioned Embodiment 3. However, the image information generation unit of this apparatus is the same as the image information generation unit 350 of the third embodiment.
In addition to the function of 2, the function of considering the arrangement of the display character string of the <A> tag in the <UL> tag is added.

Hereinafter, a configuration unique to the present embodiment will be described. When analyzing the document 2301 as shown in FIG. 23, the image information generation unit 3502 uses the <UL> tag 2306
<A> tag 2 surrounded by </ UL> tag 2307
Display character strings such as 305 are collectively converted into reproduced image information. The converted display string, for example, "Osaka", "Tokyo",
"Nagoya", "Sendai", "Hiroshima", "Fukuoka", "Sapporo"
Is stored in the image information storage area. When all can be accommodated, the first <A> tag 23 starting with the <UL> tag 2306 as in the third embodiment.
The reproduction image information processing is performed in order from the display character string 05. If it is determined that all the display character strings cannot be accommodated, a new image information storage area is provided, and it is determined whether or not the display character strings of all the <A> tags in the <UL> tag can be accommodated in the area. Then, when it is determined that it cannot be performed, the same processing as in the third embodiment is performed. When it is determined that it can be accommodated in the area, it is determined whether or not the number of <A> tags in the <UL> tag exceeds the maximum number K.
The same processing as in the third embodiment is performed. When it is determined that it does not exceed, a write instruction is given to the control unit 2205, and
Upon receiving the write completion notification from the control unit 2205, the image information storage area and the link information storage area are set in the generated information temporary storage unit 2208, and the same processing as in the third embodiment is performed.

Since the display character strings from “Osaka” to “Sapporo” cannot be accommodated in one image information storage area, they are divided into image information 3701 and image information 4101 as shown in FIG. Is done. However, the display character strings “Northern Hemisphere”, “Southern Hemisphere”, etc., surrounded by the <UL> tag 2308 and the </ UL> tag 2309 are not divided,
This becomes image information 4201 shown in FIG. Note that reproduction control information 4102 as a set of image information 4101 and 4201
4202 are generated by the link information generation unit 3503, respectively.

Next, the operation specific to the present embodiment will be described with reference to the flowchart in FIG. After S4008 shown in FIG. 40 of the third embodiment, the image information generation unit 3502 calculates the size of the display character string of the <A> tag surrounded by the <UL> tag and the </ UL> tag. It is determined whether or not the image information storage area can be accommodated (there is a blank space to write) (S4302). If there is, the process proceeds to S4010. Otherwise, if a new image information storage area is provided, all display character strings are displayed. It is determined whether (the display character string having the size calculated in S4302) can be accommodated in the area (S4304). If it can be accommodated, the process moves to S4010, and if it can be accommodated, it is determined whether the number of <A> tags in this display character string exceeds the maximum number K stored in the output device information storage unit 3501 (S4306). ). If it exceeds, the process proceeds to S4010. If it does not exceed, the control unit 2205 is notified of an instruction to write the contents of the generated information temporary storage unit 2208 that has already been written. Control unit 22
Upon receiving the write completion notification from the storage unit 05, a new image information storage area and link information storage area are newly secured in the generated information temporary storage unit 2208 (S4308), and the process proceeds to S4010.

As described above, according to the present embodiment, related items can be displayed on one screen as the same image information.

[0145]

As described above, the data conversion device of the present invention is a data communication system that enables pseudo two-way communication using one-way communication from a data transmitting device to a plurality of data receiving devices. A data conversion device used in the data transmission device, wherein part or all of text information or image information of the original document information has embedded therein link destination information to which another original document information is linked. An original document information storage unit that stores a plurality of original document information including at least one character information and at least one image information;
An additional shape storage unit that stores a list of numbered additional shapes in advance, and the character information and image information included in the original document information stored in the original document information storage unit are sequentially read out. A reproduction image element generation unit that generates a reproduction image element that is character information or bitmap information generated from each image information; and the data receiving device reproduces the reproduction image element generated by the reproduction image element generation unit. A reproduced image generating means for generating a reproduced image corresponding to one screen, and a reproduced image element in the reproduced image generated from character information or image information in which link destination information having another original document information as a link destination is embedded. The additional shapes stored in the additional shape storage means are sequentially read out in the order in which the reproduced image elements appear in the reproduced image, and are arranged in the reproduced image elements on the reproduced image. And adding shape arrangement unit, other of the reproduced image of the link destination of the character information or the reproduced image elements the link destination information indicating another original document information is linked image data corresponding to the numbers assigned to the additional shape I.e. other primaries
A reproduced image generated by the reproduced image generating means from document information
Reproduction link destination information conversion means for converting the information into reproduction link destination information indicating an image .

According to such a configuration, the reproduced image element linked to another reproduced image is visually emphasized by the additional shape, so that the user can reproduce the reproduced image in which the jump operation between the reproduced images is easy. You can see. Further, since a number is added to the additional shape added to the reproduced image element of the reproduced image, the reproduced image can be jumped between the reproduced images by using the number, for example, by a remote control attached to the television.

The reproduced image element generating means of the data conversion device is configured to determine the horizontal arrangement position of the reproduced image element of each character information and each image information included in the original document information in the horizontal direction, and the position of each character information. A conversion table storage unit that stores a character size, and a reproduction element that generates a reproduction image element from each character information according to the character size stored in the conversion table storage unit and generates a reproduction image element from each image information. And a generation unit.

Further, the reproduced image generating means of the data conversion apparatus further includes a first position in the horizontal direction of the screen of a reproduced image element of each character information and each image information included in the original document information in the conversion table storage section. An arrangement position calculation unit that stores a position, reads a head arrangement position of each reproduction image element stored in the conversion table storage unit, and calculates an arrangement position of each reproduction image element in the reproduction image; A reproduction image generation unit for arranging the reproduction image elements and generating a reproduction image corresponding to one screen according to the arrangement position of each reproduction image element calculated by the arrangement position calculation unit.

The reproduction link information conversion means of the data conversion apparatus, when a plurality of reproduction images divided from one original document information are generated by the reproduction image generation section, reproduces reproduction link destination information for each reproduction image. A set reproduction link destination information generation unit that generates a set is provided. With such a configuration,
Since the reproduction image for each screen corresponding to the display screen and the reproduction link destination information for switching the reproduction image are provided as a set, a reproduction image which cannot be scrolled and which is easy to view even on a television screen, for example, can be obtained.

Further, in the data conversion device, the additional shape storage means includes a maximum number storage section for storing a maximum number of additional shapes to be arranged in the reproduced image, and the reproduced image generating means further comprises the one-dimensional image processing apparatus. A maximum number determining unit that determines whether the number of additional shapes to be arranged in the reproduced image exceeds the maximum number, and generating a divided reproduced image when the maximum number determining unit determines that the number of additional shapes exceeds the maximum number. and a reproduction image division instruction section for instructing the division of the reproduced image so that the maximum number following additional shape is arranged in reproduced image corresponding to one screen generated by the reproduced image generating unit, the reproduced image generator Department, minutes
Generating a split playback image that is a split playback image;
are doing.

Further, the reproduction link destination information conversion means of the data conversion device further includes a divided reproduction link for generating a reproduction link destination information group for each divided reproduction image when the reproduction image generation unit generates the divided reproduction image. A destination information generation unit is provided. With such a configuration, the number of playback image elements linked to another playback image within one display screen is limited to the number of easy switching operations. Also, the reproduced image can be easily jumped between the reproduced images.

Further, when the reproduced image elements are of the same category, the reproduced image generation unit accommodates the reproduced image elements in one reproduced image and generates the reproduced image elements. Also, the character information included in the original document information is written in HTML language, the reproduced image generation unit has a configuration to determine the constant whether the elements of the same category from the description contents of the tag. With such a configuration, a set of elements of the document becomes one playback image, so that the display can be easily switched.

The data conversion device further comprises an HTML
(Hyper Text Markup Language) An information acquisition unit for acquiring original document information including character information described in a language and image information attached thereto via a communication line, and the original document information acquired by the information acquisition unit is described above. Information writing means for writing to the original document information storage means. Further, the data conversion device further assigns an identifier to a display image, which is a plurality of the reproduced images to which the additional shape arranged by the additional shape arranging means is added and a reproduced image obtained by dividing the reproduced image. A first storage unit that stores therein, for each of the display images, a reproduction link destination information group to which the same identifier is assigned corresponding to the display image converted by the reproduction link destination information conversion unit. The second storage means,
Broadcasting means for repeatedly transmitting a predetermined number of the display images stored in the storage means together with the corresponding reproduction link destination information group stored in the second storage means.

With this configuration, the user can perform pseudo two-way communication using one-way communication from the data transmission device.

[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 a first page of a WWW home page according to the above embodiment. h
FIG.

FIG. 4 is image information “Weat” which is an example of an image displayed on the first page of the WWW homepage according to the embodiment.
her. FIG.

FIG. 5 is an HTML document “Tokyo. HTML” describing an example of the second page of the WWW home page according to the embodiment. ht
FIG.

FIG. 6 is a diagram illustrating an example of a third page of the WWW homepage according to the embodiment, which is an HTML document “Osaka. ht
FIG.

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

FIG. 8 shows the HTML document and the voice information “W
earth. au "and WW generated from image information
It is explanatory drawing which shows the transmission data of the 1st page of W homepage.

FIG. 9 is an explanatory diagram showing transmission data of the second page of the WWW home page generated from the HTML document of the embodiment.

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

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

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

FIG. 13A is a flowchart illustrating a schematic processing procedure of the entire data transmitting apparatus according to 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 embodiment.

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

FIG. 16 is an explanatory diagram showing an example of a cursor graphic correspondence table created by the control unit of the embodiment for controlling 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 according to 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 held in the information acquisition unit according to 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 illustrating an example of a font table stored in the data conversion table storage unit according to the above 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 above embodiment.

FIG. 30 is a diagram illustrating an example of a list of cursor shapes stored in a cursor shape storage unit according to the embodiment.

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

FIG. 32 is a diagram illustrating an example of converted image information stored in a generation information temporary storage unit according to the above embodiment.

FIG. 33 is a diagram illustrating an example of link information stored in a generation information temporary storage unit according to the above embodiment.

FIG. 34 is a flowchart illustrating the operation of the above embodiment.

FIG. 35 is a data converter according to a third embodiment of the present invention;
FIG.

FIG. 36 is a diagram illustrating an example of a remote controller that transmits a signal to the signal receiving unit according to the above embodiment.

FIG. 37 is a diagram illustrating an example of reproduction image information and link information stored in a generation information temporary storage unit according to the above embodiment.

FIG. 38 is a diagram illustrating an example of reproduction image information and link information stored in a generation information temporary storage unit according to the above embodiment.

FIG. 39 is a diagram illustrating an example of reproduction image information and link information stored in a generation information temporary storage unit according to the above embodiment.

FIG. 40 is a flowchart illustrating an operation specific to the above embodiment.

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

FIG. 42 is a diagram illustrating an example of image information and link information stored in a generation information temporary storage unit according to the fourth embodiment of the present invention.

FIG. 43 is a flowchart showing an operation specific to the present 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 2201 information acquisition unit 2202 data conversion table storage Unit 2203 cursor shape 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 2901 link information Conversion table 3001 Cursor shape table 3501 Output device information storage unit 3502 Image information generation unit 3503 Link information generation unit 3601 Remote controller

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H04N 5/44 H04N 5/44 Z 7/025 7/08 A 7/03 7/035 (72) Inventor Hidekazu Tanigawa Okadoma, Kadoma City, Osaka Prefecture 1006 Matsushita Electric Industrial Co., Ltd. (72) Inventor Chihiro Kawahara 1006 Okadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP 9-247554 (JP, A) JP JP-A-9-148994 (JP, A) JP-A-10-51752 (JP, A) JP-A-1-278174 (JP, A) JP-A-4-47435 (JP, A) A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G06F 3/14-3/153 G06F 13/00 305-680 G09G 5/00-5/42 H04N 7/00-7/093 H04N 5/44

Claims (24)

(57) [Claims] 1. A data conversion device used in a data transmission device of a data communication system that enables pseudo two-way communication using one-way communication from a data transmission device to a plurality of data reception devices, Part or all of the character information or image information of the original document information has embedded therein link destination information to which other original document information is linked, and includes at least one character information and at least one image information. Original document information storage means for storing a plurality of pieces of original document information; additional shape storage means for previously storing a list of numbered additional shapes; and original document information storage means. Reproduction image element generation for sequentially reading the character information and image information included in the original document information and generating a reproduction image element which is bitmap information generated from each character information or each image information A reproduction image generating means for generating a reproduction image corresponding to one screen reproduced by the data receiving device from the reproduction image element generated by the reproduction image element generation means; The additional shapes stored in the additional shape storage means in the order of appearance of the reproduced image elements in the reproduced image are stored in the reproduced image elements in the reproduced image generated from the character information or the image information in which the link destination information is embedded. Additional shape arrangement means for sequentially reading and arranging the reproduced image elements on the reproduced image, and link information indicating other original document information which is a link destination of the character information or image information is added to the additional shape. The other reproduction image linked to the reproduction image element corresponding to the number is converted into reproduction link destination information indicating a reproduction image generated by the reproduction image generation means from other original document information. Data conversion apparatus characterized by comprising a reproduction destination information converting means that. 2. The reproduction image element generation means is stored in a conversion table storage unit that stores a character size of each character information included in the original document information, and is stored in the conversion table storage unit. 2. The data conversion apparatus according to claim 1, further comprising: a reproduction element generation unit that generates a reproduction image element from each piece of character information according to the character size and generates a reproduction image element from each piece of image information. 3. The reproduced image generating means, wherein the conversion table storage unit further stores a horizontal head position of a reproduced image element of each character information and each image information included in the original document information on a screen. Read out the head arrangement position of each playback image element stored in the conversion table storage unit, calculate the arrangement position of each playback image element in the playback image, and the arrangement position calculation unit, 3. The data conversion apparatus according to claim 2, further comprising: a reproduced image generation unit that arranges the reproduced image elements and generates a reproduced image corresponding to one screen according to the calculated arrangement position of each reproduced image element. . 4. The reproduction link information conversion means, when a plurality of reproduction images divided from one original document information are generated by the reproduction image generation unit, sets reproduction link destination information for each reproduction image. 4. The data conversion apparatus according to claim 3, further comprising a set reproduction link destination information generation unit that generates the set. Wherein said additional shape memory means has a maximum number storing unit for storing the maximum number of additional shape disposed in the reproduced image, the reproduced image generating means further the one reproduced image A maximum number determination unit that determines whether or not the number of additional shapes to be arranged in the reproduction image generation unit exceeds the maximum number. When the maximum number determination unit determines that the number of additional shapes exceeds the maximum number, the reproduction image generation unit generates and a reproduction image division instruction section for instructing the division of the reproduced image as additional shapes of the following maximum playback image corresponding to one screen is disposed, the reproduced image generation unit, divided reproduced image data converter according to claim 4, wherein that you generate divided reproduced image is. 6. A reproduction link destination information generation section for generating a reproduction link destination information group for each divided reproduction image when the reproduction image generation section generates a divided reproduction image. The data conversion device according to claim 5, wherein: 7. An HTML (Hyper Text Markup Language)
An information acquisition unit that acquires, via a communication line, original document information including character information described in a language and image information attached thereto, and stores the original document information acquired by the information acquisition unit in the original document information storage unit. 7. The data conversion apparatus according to claim 6, further comprising information writing means for writing. 8. An identifier is assigned to a display image which is a plurality of the reproduced images to which the additional shape arranged by the additional shape arranging means is added and the divided reproduced image when the reproduced image is divided, and is stored. A first storage unit, and a reproduction link destination information group converted by the reproduction link destination information conversion unit and assigned the same identifier corresponding to the display image for each of the display images. A second storage unit, and a broadcasting unit that repeatedly transmits a predetermined number of display images of the display images stored in the first storage unit together with a corresponding reproduction link destination information group stored in the second storage unit. The data conversion device according to claim 7, further comprising: 9. The data according to claim 4, wherein when the reproduced image elements are in the same category, the reproduced image elements are generated by storing the reproduced image elements in one reproduced image. Conversion device. Wherein said character information <br/> contained in the original document information is written in HTML language, the reproduced image generation unit description Description of the tag whether the elements of the same category data converter according to claim 9, wherein the stamp constant child from. 11. The additional shape storage means has a maximum number storage section for storing a maximum number of additional shapes to be arranged in the reproduced image, and the reproduced image generating means further comprises: the one reproduced image. A maximum number determination unit that determines whether or not the number of additional shapes to be arranged in the reproduction image generation unit exceeds the maximum number. When the maximum number determination unit determines that the number of additional shapes exceeds the maximum number, the reproduction image generation unit generates A reproduced image division instructing unit for instructing division of the reproduced image such that the additional shape not more than the maximum number is arranged in a reproduced image corresponding to one screen, wherein the reproduced image generation unit generates a divided reproduced image. The data conversion device according to claim 10, wherein the data conversion is performed. 12. The reproduction link destination information generation unit, further comprising: when the reproduction image generation unit generates the division reproduction image, generates a reproduction link destination information group for each division reproduction image. The data conversion device according to claim 11, comprising: 13. A data conversion device used in a data transmission device of a data communication system that enables pseudo two-way communication using one-way communication from a data transmission device to a plurality of data reception devices, A plurality of pieces of original document information including at least one piece of character information are stored, and link information having another original document information as a link destination is embedded in a part or all of the piece of the original document information. Original document information storage means, an additional shape storage means for storing a list of numbered additional shapes in advance, and the character information included in the original document information stored in the original document information storage means And a reproduced image element generating means for generating bitmap information generated from the reproduced image elements, that is, the respective character information, and a reproduced image generated by the reproduced image element generating means. Reproduction image generation means for generating a reproduction image corresponding to one screen reproduced by the data receiving device from the image element, and character information in which link destination information having another original document information as a link destination is embedded. An additional shape stored in the additional shape storage means in order of appearance of the reproduced image elements in the reproduced image in the reproduced image element in the reproduced image, and arranged in the reproduced image element on the reproduced image; Arranging means, and link destination information indicating another original document information which is a link destination of the character information, another reproduction image of a link destination of a reproduction image element corresponding to the number assigned to the additional shape, that is, another A reproduction link destination information conversion unit that converts original document information into reproduction link destination information indicating a reproduction image generated by the reproduction image generation unit. 14. A reproduction table element generating unit, comprising: a conversion table storage unit storing a character size of each character information included in the original document information; and a character table stored in the conversion table storage unit. 14. The data conversion device according to claim 13, further comprising a reproduction element generation unit that generates a reproduction image element from each character information. 15. The conversion table storage unit further stores, in the conversion table storage unit, a horizontal top position of a reproduction image element of each character information included in the original document information on the screen. An arrangement position calculation unit that reads a head arrangement position of each reproduction image element stored in the unit and calculates an arrangement position of each reproduction image element; and an arrangement position of each reproduction image element calculated by the arrangement position calculation unit. 15. The data conversion device according to claim 14, further comprising: a reproduced image generation unit that generates a reproduced image corresponding to one screen according to the above. 16. The reproduction link information conversion means, when a plurality of reproduction images divided from one original document information are generated by the reproduction image generation unit, sets a reproduction link destination information group for each reproduction image. 16. The data conversion apparatus according to claim 15, further comprising a set reproduction link destination information generation unit for generating the data. 17. The additional shape storage means has a maximum number storage section storing a maximum number of additional shapes to be arranged in the reproduced image, and the reproduced image generating means further comprises: the one reproduced image. A maximum number determination unit that determines whether or not the number of additional shapes to be arranged in the reproduction image generation unit exceeds the maximum number. When the maximum number determination unit determines that the number of additional shapes exceeds the maximum number, the reproduction image generation unit generates A reproduced image division instructing unit for instructing division of the reproduced image such that the additional shape not more than the maximum number is arranged in a reproduced image corresponding to one screen, wherein the reproduced image generation unit generates a divided reproduced image. 17. The data conversion device according to claim 16, wherein: 18. A reproduction link destination information generation unit for generating a reproduction link destination information group for each divided reproduction image when the reproduction image generation unit generates the divided reproduction image. 18. The data conversion device according to claim 17, comprising: 19. An HTML (Hyper Text Markup Language)
Information acquisition means for acquiring, via a communication line, original document information including character information described in a language; information writing means for writing the original document information acquired by the information acquisition means to the original document information storage means; 19. The data conversion device according to claim 18, comprising: 20. A display image, which is a plurality of reproduced images to which an additional shape arranged by the additional shape arranging means has been added and a divided reproduced image obtained when the reproduced image is divided, is given an identifier and stored. A first storage unit, and a reproduction link destination information group converted by the reproduction link destination information conversion unit and assigned the same identifier corresponding to the display image for each of the display images. A second storage unit, and a broadcasting unit that repeatedly transmits a predetermined number of display images of the display images stored in the first storage unit together with a corresponding reproduction link destination information group stored in the second storage unit. 20. The data conversion device according to claim 19, further comprising: 21. The playback image generating section according to claim 1, wherein when the playback image elements are elements of the same category, the playback image elements are generated by accommodating the playback image elements in one playback image.
6 Symbol mounting data conversion device. 22. The character information included in the original document information,
Written in HTML language, the reproduced image generation unit according to claim 21, wherein that <br/> determination Priority determination whether an element of the <br/> same category from the description content of the tag Data converter. 23. The additional shape storage means has a maximum number storage section storing a maximum number of additional shapes to be arranged in the reproduced image, and the reproduced image generating means further comprises: the one reproduced image. A maximum number determination unit that determines whether or not the number of additional shapes to be arranged exceeds the maximum number. When the maximum number determination unit determines that the number of additional shapes exceeds the maximum number, the reproduction image generation unit generates the additional shape. and a reproduction image division instructing section division that instructs the playback image as additional shapes of the following maximum playback image corresponding to one screen is disposed, the reproduced image generating unit has been divided reproduced Image is a division
23. The method according to claim 22, wherein a reproduced image is generated.
Data converter. 24. A reproduction link destination information generation unit for generating a reproduction link destination information group for each divided reproduction image when the reproduction image generation unit generates the divided reproduction image. 24. The data conversion device according to claim 23, comprising: