JP2002094951A - Transmitter, receiver, reception method realizing interactive performance by use of broadcasting, and medium recording its reception program, and communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitter, a receiver and a communication system that can realize interactive performance in a unidirectional communication system such as a TV broadcasting. SOLUTION: The data transmitter 110 in the communication system of this invention repetitively transmits a prescribed number of image data stored in a display image information storage section 123 and control information stored in a link information storage section 125. Furthermore, the data receiver 150 is provided with a reception separation section 151 that separates a broadcast wave into a set of the image data and the control information, a received data storage section 152 and a reproduction section 153 that store the separated result and reproduce it, a reproduction means that reproduces the stored image data to provide an output of a video signal, and a control means that controls the separation means so as to separate other image data denoted by the control information in the storage means according to the operation of a user. Through the configuration above, using the broadcast wave sequentially reproduces image data desired by the user to realize the interactive performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a one-way communication such as television (hereinafter, referred to as TV) broadcasting to transmit a broadcast program as if a transmitting side responded to a transmission request from each receiving side. The present invention relates to a data transmission device, a data reception device, a data reception method, a medium recording a reception program thereof, and a data communication system for performing pseudo two-way communication processing as if it were performed.

[0002]

2. Description of the Related Art Today, various types of information provided by servers around the world can be received and displayed on a personal computer (hereinafter referred to as a personal computer) at home via a network connected by a telephone line or the like. it can. As a typical example, the World Wide Web (WWW) of the Internet is known. WWW server,
The image information and control information for applying the image information to the character information and displaying the image information as data for displaying the display image of one page on the personal computer are transmitted to the personal computer. If the page consists of only character information, only control information for displaying the character information is transmitted. The control information includes HTML (Hyper Text Ma).
rkup Language), and the browser in the personal computer interprets and executes the HTML to display each page of the WWW homepage. The displayed figure or character string is associated with another page that describes information related to the figure or character string, and the operator can select the displayed part with a mouse or the like and operate it. Then, the browser accesses the WWW server that provides the page and acquires information for displaying the page. Next, the obtained information is interpreted and executed, and the page is displayed.

Japanese Patent Application Laid-Open No. Hei 7-322226 discloses a technique for transmitting control information for generating the above-described interactive screen by multiplexing the control information into a broadcast program by using terrestrial TV broadcasting. In this technique, the program transmission device multiplexes data indicating a configuration of an interactive screen, which is described in a language similar to HTML, into a broadcast program and broadcasts the data. The program receiving apparatus receiving this interprets the configuration instruction of the interactive screen, combines the basic display elements stored therein according to the instruction, configures the interactive screen, and superimposes and displays the interactive screen on the screen of the broadcast program. .

[0004]

However, since the control information described in the above-described language describes various control contents for display, in order to perform display according to the control information, The receiving device must interpret and execute this one by one. Further, in the receiving apparatus, when trying to display the image information as provided by a WWW server, an image compressed by a high-resolution and advanced technology is decompressed according to a specific format and displayed according to the control information. Processing must be performed. As a result of requiring such advanced processing, there is a problem that the load on the receiving device increases and the cost of the receiving device increases.

[0005] Further, in the above-mentioned program receiving apparatus, it is not possible to interactively change the contents of a broadcast program using the configured interactive screen. The present invention has been made in view of the above problems, and in a one-way communication system such as a TV broadcast, a pseudo-interactivity between a data transmitting device and a data receiving device is suppressed while suppressing an increase in load on the data receiving device. Transmission device that can be realized,
It is an object to provide a receiving device, a receiving method, a recording medium of a receiving program, and a communication system.

[0006]

In order to solve the above-mentioned problems, a transmitting apparatus in a communication system for realizing interactivity using broadcast waves, comprising: a first apparatus for storing a plurality of image data corresponding to one frame; Storage means; second storage means for storing control information indicating a link to other image data for each image data in the first storage means; and transmission means for repeatedly transmitting a predetermined number of image data together with the control information. ing.

The transmitting means reads out a predetermined number of image data and the corresponding control information from the first and second storage means repeatedly, the image data read by the reading means, and the control information. Multiplexing means for multiplexing the image data and the control signal by placing them in the video section and the retrace section of the television signal, respectively, and transmitting means for transmitting the multiplexed television signal as an analog broadcast wave. It may be provided.

Further, the image data and control information in the first and second storage means are digitized, and the transmission means stores a predetermined number of image data and control information corresponding thereto in the first and second storage means. Reading means for repeatedly reading from the storage means, multiplexing means for converting image data and control information read by the reading means into digital data streams and generating a multiplexed stream obtained by multiplexing them, and digital broadcasting of the multiplexed stream. And a transmitting means for transmitting as a wave.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 shows a data communication system 10 according to a first embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a 0. The data communication system 100 includes a data transmission device 110 and a plurality of data reception devices 150.

[0010] The data transmitting device 110 includes an information acquiring unit 11.
1, transmission data generation unit 112, transmission data holding unit 11
3. It includes a transmission data reading 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 153,
A display unit 154, a control unit 155, and a signal receiving unit 156 are provided.

(Description of Configuration of Data Transmitting Apparatus 110) Hereinafter, each configuration of the data transmitting apparatus 110 will be described.

(Description of Configuration of Information Acquisition Unit 111) The information acquisition unit 111 includes an acquisition list storage unit 121 and a buffer (not shown) for retaining information acquired from an external database such as a WWW server.

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

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

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

The information acquisition unit 111 includes an acquisition list storage unit 1
21, the URL of the acquisition destination and the file name of the information to be acquired are read out in the order of the acquisition order number 201 and the URL is read out.
To access the WWW server indicated by (1) and acquire the file with the file name. The information acquisition unit 111 assigns a file name to the acquired file and stores the file in the buffer.

(Exemplary Description of Acquired File) Hereinafter, the contents of the file acquired by the information acquiring unit 111 will be described with reference to FIG.
This will be specifically described with reference to FIGS.

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

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

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

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

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

<LI> in lines 319 and 320 indicates that the character string up to the next <LI> or </ UL> will be one item in the list. Row 319
<A HREF=“Tokyo.html”> Tokyo </A> is obtained 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 a 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, a description thereof will be omitted except for a description of a link to another page. <A HREF = “Repo” in line 511
rt. html “> return </A> is converted from the character string“ return ”to the HTML document 301“ Report.
html ”is linked.

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

The information acquisition unit 111 may continuously acquire all the files shown in the acquisition list storage unit 121 and store 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. Data conversion table storage unit 12
Reference numeral 2 denotes a tag table indicating control contents of each HTML tag and a corresponding flag, a font file containing a character font for TV display for each application, and a format for link information describing a hot spot for the data communication system 100. Is stored in the link information table. The work area includes a file storage area for holding an HTML document of one file, a tag storage area for securing a character string sandwiched between <> in a tag, and a character storage area other than a tag. And a flag storage area for setting a flag for controlling generation of display image information representing image data corresponding to one frame. The character string written in the tag storage area and the character string written in the character string storage area are deleted each time the processing corresponding to the tag (flag) is completed. If there are a plurality of flags in the flag storage area, they are set in order from the top and reset in order from the bottom.

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

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

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

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

Further, the transmission data generation unit 112
When tags are read in order from the beginning of the ML document, the read tags are compared with the tag table, and the control contents of the tags are interpreted. The interpretation of the control contents is as follows. The character string following the tag start character "<" is written to 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. A character string sandwiched between the tag <> and the corresponding tag </> is secured in the character string storage area of the work area in a flag storage area of the work area in association with the flag. 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 certain format such as bitmap data or graphic data. Is converted into image information represented by. For example, the extension of the file name of the specified image information file is “. gif "
Then, the image information is expanded according to the GIF format,
It is converted into image information of a predetermined format. If there is a higher-level flag indicating the control content for the converted image information, display image information is generated such that the image is arranged at a 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 voice information, the voice information is extracted from the acquisition list storage unit 121, converted into voice information of a predetermined format, and the converted voice information is stored in the voice information storage area.

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

When the transmission data generation unit 112 completes all the processing for the content described in one HTML document by the above processing, the transmission data generation unit 112 actually saves the display image information in the display image information area stored 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 number or symbol including characters. There may be. It may be represented by a figure, a bar code, or the like. Alternatively, it may be a file name. Further, the voice information stored in the voice information storage area and the link information stored in the link information storage area are assigned to the corresponding storage areas in the same manner as for a general digital data file. Attached identification number.

By such 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 “Weather. au "and the transmission data 800 of the first page of the WWW homepage 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.
FIG. 9 is an explanatory diagram showing transmission data 1000 of the third page of the WWW homepage 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. 8 (a)
FIG. 9 is an explanatory diagram showing the contents of display image information 801 using a display image displayed based on display image information 801.
FIG. 8B is an explanatory diagram illustrating the audio information 802. FIG. 8C is an explanatory diagram showing the contents of the link information 803.

An area indicated by a broken line above the display image information 801 indicates a non-display area common to all display image information. The non-display area is not displayed on the display screen of the display unit 154. The identification number “0001” represented as an image by the transmission data generation unit 112 is written in the upper right corner of the non-display area.
In the displayed area, a character string represented by a character code in the original file is displayed as an image, and together with the image represented as image information, a single image is displayed on one screen as a whole. Represents an image.

The voice information 802 is voice information linked to a character string “voice 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”. Like the audio information 802,
As shown in FIG. 8C, the file storing the link information 803 is assigned 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 represented by coordinate values (100, 600) on the display image information 801.
_TO_PAGE (0002)], indicating that the cursor image held by the data receiving device 150 should be displayed at this position. The instruction "GO_TO_PAGE (0002)" is "000
2 ”indicates an instruction to display a page represented by the transmission data 900 with the identification number“ 2 ”.

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

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

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

A line 912 includes a command “GO” at a position on the display image information 901 represented by a coordinate value (050, 400).
_TO_PAGE (0001)], which indicates that the cursor should be displayed at this position.
The instruction “GO_TO_PAGE (0001)” is “00
01 ”is displayed to indicate the page represented by the transmission data 800 having the identification number“ 01 ”.

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

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

In a row 1012, a command “GO_TO_PAGE (0001)” is associated with a position represented by a coordinate value (050, 400) on the display image information 1001, and a cursor should be displayed at this position. It represents that. The instruction "GO_TO_PAGE (0001)"
It represents a command to display the page represented by the transmission data 800 with the identification number “0001”.

(Information acquisition unit 111, transmission data generation unit 1)
12) Hereinafter, information obtained until the transmission data shown in FIGS. 8, 9 and 10 is generated by using the files illustrated in FIGS. 3, 4, 5 and 6 and using the obtained files. The processing of the acquisition unit 111 and the transmission data generation unit 112 will be specifically described.

(Processing of Information Acquisition Unit 111) Information Acquisition Unit 1
11 requests a connection to a WWW server on the Internet indicated in the acquisition list storage unit 121, and from the WWW server, an HTML document 301 “Report” to be acquired.
t. html ”is obtained. Next, the acquired HTML
The file name “Report. html ”and store it in the buffer. Similarly, the compressed image information 401, the HTML document 501, and the HTML document 601 are obtained from the WWW server.

(Processing of Transmission Data Generation Unit 112) The transmission data generation unit 112 stores, in the transmission data holding unit 113, a storage area for display image information 801, a storage area for audio information 802, and a storage area for link information 803. A storage area for storing the transmission data 800 is set, and the identification number “000” for reading the transmission data 800 is set in the set storage area.
1 ”. An unprocessed HTML document 301 is extracted from the buffer of the information acquisition unit 111, and the extracted H
Write the TML document 301 to the file storage area of the work area.

The transmission data generation unit 112 generates a 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 homepage is generated, and the index information is stored at the top of the link information 803 storage area in the transmission data holding unit 113. 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 generating unit 112
Twelve tags <H1> are read, the tags <H1> are interpreted with reference to the tag table, and a heading flag is set in a flag storage area in the work area. The heading flag has the tag <H
The character string following <1> is a heading, indicating that it should be displayed using a heading font. Subsequently, the character string “weather forecast” is read as a result while the character string following the tag <H1> is written to the character string storage area one character at a time until the tag </ H1> appears.
Appears, the character string "weather forecast" in the character string storage area
Is converted into display image information using a predetermined heading font. The generated display image information is added to the display image storage area set in the transmission data holding unit 113. Reset the heading flag set in the work area,
The character string “weather forecast” secured in the character string storage area and the character string “H1” secured in the tag storage area are deleted.

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

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

The transmission data generation unit 112 reads the tag </ CENTER> in the 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 in line 312, "weather forecast", the character string "Tomorrow will be cheerful throughout the country" is read and secured in the character string storage area of the work area. Next, when the tag </ P> is read, the character string that it holds, "Tomorrow will be the merry spring nationwide"
Is converted into an image using the paragraph font stored in the font file, and the transmitted data
Is added to the storage area for display image information 801 in FIG. Further, the work area is reset.

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

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

After reading the tag <LI> in line 320, the transmission data generating unit 112 changes the display position of the display image to a new line because of the presence of the item flag, and executes the character string “Osaka” in the same manner as the processing in line 319. 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 format,
The converted voice information is stored in the storage area for voice information 802.

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

The transmission data generation unit 112 outputs the file name “Tokyo. html "
From the index information “<IN” shown in the row 911 of the transmission data 900 representing the second page of the WWW homepage.
DEX = 0002>], and the transmission data holding unit 1
Thirteenth link information 902 is stored at the head of the storage area.
Hereinafter, the transmission data 900 can be generated from the HTML document 501 and the transmission data 1000 can be generated from the HTML document 601 in the same manner as the generation of the transmission data 800 from the HTML document 301 and the image information 401. Is omitted.

(Description of Configuration of Transmission Data Holding Unit 113, Transmission Data Reading Unit 114, Multiplexing Unit 115, and Transmission Unit 116) The transmission data holding unit 113 has a display image information storage unit Information storage unit 124
And a link information storage unit 125.

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

The link information storage section 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 section 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 identification numbers in the order of identification numbers. 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 section 114 reads the transmission data stored in the transmission data holding section 113 in order of the identification number, and outputs the transmission data to the multiplexing section 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, the transmission data reading unit 114
If there is no voice information, after reading the transmission data file once, the process proceeds to reading the transmission data file of the next identification number. If audio information exists, the audio information is read from the transmission data file,
Furthermore, after reading the display image information and the link information of the transmission data file a plurality of times during the time required for reproducing the audio information, the process proceeds to reading 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 reading unit 114 reads the audio information once, reads the display image information and the link information 60 times (2 seconds * 30 frames / second), Move on to reading of the transmission data file of the identification number. Thereby, the transmission time of the voice information is secured.

The multiplexing unit 115 includes the transmission data reading unit 11
4 multiplexes the display image information (including the audio information) read out with the link information and outputs the multiplexed information to the transmission unit 116. The multiplexing method uses, for example, a conventional character multiplexing technology for TV broadcasting. In this case, the display image information and the audio information are similar to the conventional broadcast program including the image and the audio,
The link information is multiplexed in the same manner as general character information multiplexed on 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 included in the television audio signal, the display image information, and the link information are included in the video section and the return section of the television video signal over a plurality of frames required for the reproduction time of the audio data. Sent and sent.

The transmitting section 116 sequentially transmits the transmission data multiplexed by the multiplexing section 115 as TV broadcast terrestrial waves.

(Description of Transmission Data Transmission Method) FIG. 11
FIG. 4 is an explanatory diagram illustrating a transmission method of transmission data by the transmission unit 116. In FIG. 11, the first page to the n-th page
(N is a natural number) shows a case where transmission data up to a page is generated by the transmission data generation unit 112. FIG. 11 shows a set of display image information and audio information having the same identification number as one transmission unit associated with a normal TV broadcast program, and shows link information having one identification number as the broadcast information. It is represented as one transmission unit associated with general character information multiplexed on a program.

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, and furthermore, here, 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 section 114
Stores the display image information, audio information, and link information stored in the same transmission data file in the display image information storage unit 12.
3, the voice information storage unit 124 and the link information storage unit 125 are simultaneously read out, whereby the display image information, the voice information, and the link information are transmitted in association with both the identification number and the transmission timing. The display image information (including the audio information) and the link information do not always need to be transmitted until the transmission timing. For example,
The transmission data reading unit 114 includes two components, a first reading unit and a second reading unit. The first reading unit includes a display image information storage unit 123 and a voice information storage unit 124.
The second read unit continuously reads out only the link information generated in the link information storage unit 125. Alternatively, the data may be read out and output to the multiplexing unit 115. 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 an identification number, the data reception device 150 is identified by the identification number.
The corresponding side can capture the corresponding display image information and link information.

Further, multiplexing section 115 multiplexes the display image information (including audio information) generated by transmission data generation section 112 and the link information, and transmission section 116 transmits the multiplexed transmission data to the 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 compression coding technique and a multiplexing technique based on the MPEG2 video standard and the system standard are used, the display image information is set as an I picture, Alternatively, the link information may be transmitted as private information. As described above, when the display image information, the audio information, and the link information can be transmitted as digital data, the identification number imaged in the non-display area in the display image information as described above is written. It is not necessary to keep the information, and the display image information and the audio information can be transmitted with the identification number simply attached, similarly to the link information.
The MPEG2 standard is described in detail in "Latest MPEG Textbook" (released by ASCII Publishing Co., Ltd.).

FIG. 31 is an explanatory diagram of a multiplexed stream transmitted when using satellite digital broadcasting. The upper part of the figure shows a transport stream according to the MPEG2 standard. This transport stream is
Multiplexed by the multiplexing unit 115. “V1, A1, L1” in the transport stream indicates display image information, audio information, and link information read from the transmission data file corresponding to the identification number 1 and multiplexed.
The same applies to “V2, A2, L2” to “Vn, An, Ln”.

"V1" is I based on the MPEG2 standard.
This is a video elementary stream representing display image information converted into (Intra) pictures, and a PID (Packet IDentifier) “0x0100” for distinguishing the streams is provided. The same applies to “V2” and thereafter. "A1"
Is an audio elementary stream representing audio information converted in accordance with the MPEG2 standard, and is provided with a PID “0X0101” for distinguishing the stream. The same applies to “A2” and thereafter.

"L1 to Ln" are private sections conforming to the MPEG2 standard for carrying each piece of link information, are assigned a table ID "0xB0" for distinguishing private sections, and further distinguish individual link information. For this purpose, an identification number is set in the table ID extension. 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 an image area centered at (100, 600), identifier 0
A link (GOTO_PAGE (0002)) to the display image of 002 is set, and a link (GOTO_PAGE (GOTO_PAGE (0002)) to the display image of the identifier 0003 is set for the image area centered on the coordinates (X, Y) = (100, 700). 0002)) is set.

Further, the correspondence between the PID and the identification number is determined by a PMT (Prgram Map Table) conforming to the MPEG2 standard.
ble). 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, for example, by setting an identification number in a tag. In this case, the video elementary stream, audio elementary stream, and private section are created by the transmission data generation unit 112 and stored in the transmission data holding unit 113, respectively.
One set of the video elementary stream, the audio elementary stream, and the private section held in the transmission data holding unit 113 corresponds to the transmission data file. Transmission data holding unit 113
, The one set of the video elementary stream, the audio elementary stream, and the private section are all read once. The transmission data reading unit 114 reads all transmission data files cyclically. Further, the transport stream in FIG. 31 is created by the multiplexing unit 115.

By multiplexing the PMT with n sets of display image information, audio information, and link information in the transport stream in this way, it is possible to easily transmit the PMT using satellite digital broadcasting.

(Schematic Processing Procedure of Entire Data Transmitting Apparatus 110) The processing procedure of the data transmitting apparatus 110 will be specifically described below with reference to FIGS.

FIG. 12 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,
It is stored in an internal buffer (step 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 (step S1102).

The transmission data reading section 114 reads out the transmission data in the transmission data holding section 113 in order of the identification number (step 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 ( Step S
1104).

(Processing Procedure of Information Acquisition Unit 111) FIG.
9 is a flowchart illustrating an example of a procedure of an information acquisition process performed 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 step S120.
1). If not, the information acquisition process ends. If it exists, the acquisition destination address (UR) of the information that has not yet been acquired
L) is taken out (step S1202). A connection is requested to the external database based on the extracted address (step S1203), and it is confirmed whether or not the connection was successful (step S1204). In the case of failure, the process returns to step S1203 (step 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 (step S1205). Step S
It returns to 1201.

(Processing Procedure of Transmission Data Generation Unit 112) FIG. 14 is a flowchart showing an example of the procedure of transmission data generation processing by the transmission data generation unit 112.

The transmission data generation unit 112
11, it is checked whether there is any unprocessed HTML document (step 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 one unprocessed HTML document is extracted from the buffer (step S1302).

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

It is checked whether the read character is the tag start character "<" (step S1305). If it is a tag start character, the process moves to step 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 (step S1306). The next character is read (step S1307). It is checked whether the tag end character is “>” (step S1308). For tag end characters,
It moves to step S1310. If not a tag end character,
The read character is added to the tag storage area in the work area and written, and the process returns to step S1307 (step S13).
09).

The character string in the tag storage area is compared with the tag table to check whether the character string starts with "/" (step S1310). If the character string starts with "/", it is checked whether the read tag is a </ HTML> tag (step S1311). In the case of the </ HTML> tag, all the work areas are reset and step S13
Return to 01. If the tag is not a </ HTML> tag, processing corresponding to the lowest flag set in the flag storage area corresponding to the tag is performed, and the corresponding storage area in the work area is reset (step S1312). S
Return to 1304.

If it is determined in step S1310 that the character string does not start with "/", it is checked whether the read tag is an <IMG> tag (step S1313). <I
In the case of the <MG> 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 (step S131).
4). The extracted image information is converted into image information represented by bitmap data according to a GIF expansion method,
It returns to step S1304 (step 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 (step S13).
16), and return to step S1304. 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, in the following, the data communication system 1
Only the processing for the </A> tag related to the generation of the link information generated in the format dedicated to 00,
This will be described as an example of the process in step S1312.

FIG. 15 is a flowchart showing a specific example of a part of the processing procedure in step S1312 in FIG. <A> Check whether the tag is a tag (step S14)
01). If it is not the <A> tag, the process moves to step S1408. In the case of the <A> tag, it is checked whether the link destination file indicated by the attribute value is a voice information file (step S1402). If the file is a voice information file, the process moves to step S1407.

If it 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. (Step S140
3). The XY coordinates indicating the display position of the cursor graphic are calculated (step S1404).

The 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 (step 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 (step S1406).

The voice information file is taken out, the voice information in the file is converted into a predetermined format, and stored in the voice information storage area (step S1407). Perform processing corresponding to the read tag (step S140)
8).

(Description of Configuration of Data Receiving Apparatus 150) Hereinafter, the data receiving apparatus 150 will be described with reference to FIGS.
Each configuration will be described.

(Configuration of Reception Separation Unit 151) Reception Separation Unit 1
Reference numeral 51 includes a read buffer 161 for reading an identification number given to transmission data. The read buffer 161 has a storage area for temporarily storing display image information (including audio information) for one file and link information for one file.

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

If the read identification number is not the identification number specified by the control unit 155, the read buffer 161
The display image information (including the audio information) or the link information stored in the storage unit is discarded, and the new display image information (including the audio information) and the link information are updated until the identification number specified by the control unit 155 is read. And read buffer 161
And repeat the above process.

(Reception data holding section 152, reproduction section 15
3. Configuration of the display unit 154) The reception data holding unit 152
The display image information (including the audio information) separated by the reception separation unit 151 and the link information are stored in association with each other by the identification number. The area for storing the display image information is
For example, it is realized by 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 to be 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, an initial value is set in a register for storing a variable value, and received so as to capture display image information (including audio information) and link information of, for example, an identification number “0001” corresponding to the page indicated by the initial value. An instruction is given to the separation unit 151.

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

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

FIG. 17 is an explanatory diagram showing an example of the graphic information held by the control unit 155. As shown in FIG. 17, the control unit 155 holds, in association with each cursor number, graphic information 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, and the 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.

(Received Data Display Control Processing) In the following, the received data holding unit 15
A set of display image information (including audio information) having the same identification number and link information stored in a corresponding storage area in the storage unit 2 is referred to as reception data, and a display control process of the reception data by the control unit 155 will be described. This 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 which is taken in according to the instruction and stored in the received data holding unit 152, the variable Cur-Pos
The graphic information of each cursor in which the cursor indicated by is selected is output to the reproducing unit 153 together with the corresponding display position. Next, when an interrupt from the signal receiving unit 156 occurs, the input signal held in the signal receiving unit 156 is interpreted. First, check if the input is “up” and “up”
If so, the value of the variable Cur-Pos is reduced by one. Check whether the input is “down”, and if it is “down”, the variable Cur
Increase the value of Pos by one. It is checked whether the input is "confirmed", and if it is "confirmed", the coordinates of the display position are obtained from the cursor number indicated by the variable Cur-Pos, and the file of the link destination described in the hot spot information is obtained from the coordinates. Get the identification number of Further, the identification number is stored in a variable P
The value is set to the value of -Index, and the reception separation unit 151 is instructed to take in the transmission data indicated by the variable P-Index.

(Configuration of Signal Receiving Unit 156 and Audio Output Unit 157) Upon receiving an input signal from an external remote controller (not shown), the signal receiving unit 156 generates an interrupt to the control unit 155 due to the reception of the input signal. Holds the received input signal.

The audio output section 157 is realized by a speaker or the like, and outputs reproduced audio information as audio.

(Exemplary Display Image) FIG. 18 is an explanatory diagram showing a display image 1800 of an initial screen displayed on the display unit 154 based on the transmission data 800 of 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 the display unit 154 based on the transmission data 900 of FIG.
It is explanatory drawing which shows 0.

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

FIG. 20 is an explanatory diagram showing a display image 2000 of the initial screen displayed on the display unit 154 based on the transmission data 1000 of FIG. Similarly, the display image 200
0, according to the hot spot information shown in the row 1012 of the link information 1002, at the display position (050, 400) in the display image represented by the display image information 1001,
A cursor graphic 2001 indicating the selected state is displayed corresponding to the cursor number "1".

(Specific Example of Processing of Control Unit 155) Hereinafter, a processing procedure of the control unit 155 when displaying the display image 1800 on the display unit 154 based on the transmission data 800 will be specifically described.

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

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

Hereinafter, by performing the same processing as described above, the display image 2000 shown in FIG. 20 can be displayed on the display unit 154. When the value of the variable Cur-Pos is “1”, an interrupt occurs. When the control unit 155 refers to the signal receiving unit 156 due to the interrupt, the signal receiving unit 156 holds an input signal indicating “determined”. In such a case, the control unit 155 can cause the display unit 154 to display the display image 1900 shown in FIG.

(Procedure of Display Control Process) FIG. 21 is a flowchart showing an example of the procedure of the display control process of the control unit 155.

The control unit 155 sets a variable P-Index indicating the identification number of the transmission data to be captured to an initial value (step S2101). The control unit 155 sets a variable Cur-Pos indicating the cursor number of the selected state on the initial screen of each display image to an initial value (step S21).
02). The control unit 155 instructs the reception separation unit 151 to take in the transmission data having the identification number of the variable P-Index. The reception separation unit 151 separates display image information and link information from the received transmission data according to an instruction from the control unit 155, associates the corresponding display image information and link information with each other by an identification number, and stores the received data in the reception data holding unit. 152
(Step S2103).

[0131] The reproduction section 153 reproduces the display image information in the reception data holding section 152 and outputs it to the display section 154 in accordance with an instruction from the control section 155. If there is audio information associated with the display image information, the audio information is reproduced and output to the audio output unit 157 (step S2104). The control unit 155 interprets the link information in the received data holding unit 152, outputs the graphic information representing the cursor graphic together with the X-Y 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
(Step 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 (step S2106). When the interrupt occurs, the control unit 155 checks whether the input signal held in the signal receiving unit 156 is “up”. (Step S210
7). If it is "up", "1" is subtracted from the value of the variable Cur-Pos (step S2108), and if it is not "up", it is checked whether it is "down" (step S2).
2109).

If it is "lower", "1" is added to the value of the variable Cur-Pos (step S2110). If it is not "lower", it is further checked whether it is "determined" (step S2110). S2111). If it is “determined”, each value is in the order of cursor number → cursor display position (X, Y) in the cursor graphic correspondence table → link destination file identification number in the hot spot information according to the value of the variable Cur-Pos at that time. Is obtained, and the obtained identification number is assigned to a variable P-Index.
Set to the value of. Thereafter, the process returns to step S2102.

If not "confirmed", step S2106
Return to As described above, according to the present embodiment, the display image information that should be generated while interpreting the control information on the data receiving apparatus 150 side should be generated on the data transmitting apparatus 110 side in advance. Since transmission is performed, the load on the data receiving device 150 can be reduced. In addition, compared to the large number of display character string display control processes described in the control information and the large number of processes, the control process based on link information is limited in the types of processes. The number of processes is small. Therefore, the data receiving device 150
Using such link information, pseudo two-way communication with the data transmitting apparatus 110 can be easily performed.

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

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

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

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

In the transport stream shown in FIG. 31, the video elementary stream is composed of I pictures, but may be a video elementary stream including P pictures and B pictures. The display image information is encoded according to the MPEG2 standard.
Other formats such as a G format and a GIF format may be used. further,
Although the display image information and the audio information are a video elementary stream and an audio elementary stream, they may be multiplexed in a private section format like the link information.

(Second Embodiment) FIG. 22 is a block diagram showing a configuration of a data communication system 2200 according to a second embodiment of the present invention. In FIG. 22,
The same components as those of the data communication system 100 shown in FIG. 1 are denoted by the same reference numerals. Also, since these have already been described, the description will be omitted. Further, the voice information may be processed in the same manner as in the data communication system 100, and the description is omitted below.

The data communication system 2200 includes a data transmitting device 2210 and a data receiving device 150.
The data transmission device 2210 includes a first acquisition unit 2211 and a second acquisition unit 2211 instead of the information acquisition unit 111 of the data transmission device 110.
An acquisition unit 2212 is provided, and a transmission data generation unit 2213 is provided instead of the transmission data generation unit 112.

The first acquisition unit 2211 is connected to the first external database 2221 and is connected to the information acquisition unit 11 shown in FIG.
1 has the same configuration as that of FIG. In addition, in the same manner as the information acquisition unit 111, a file as shown in FIGS. 2 to 6 is acquired from the first external database 2221, and the acquired file is given a file name and stored in an internal buffer. First external database 2
221 is the same as the external database shown in FIG.

The second acquisition section 2212 is connected to a second external database 2222 which is different from the first external database 2221. The second acquisition section 2212 acquires files to be acquired from the second external database 2222 one by one. This is the same as the information acquisition unit 111 and the first acquisition unit 2211. The second external database 2222 stores image information files created in advance in a fixed format and display size.

FIG. 23 shows image information 2301 acquired by the second acquisition unit 2212 from the second external database 2222.
[CM0001. FIG. 4 is an explanatory diagram showing an example of “BMP”.
As shown in FIG. 23, the image information 2301 is created in a fixed display size, and represents a display image which is an advertisement content of a personal computer. The extension of the file name of the image information file “. “BMP” indicates that the image information 2301 is represented by bitmap data.

The transmission data generation section 2213 includes a data conversion table storage section (not shown) and a storage area (not shown) serving as a work area for generating transmission data. The data conversion table storage unit includes a data conversion table storage unit 1
In addition to the storage content similar to that of the HTML document 22, the first acquisition unit 2211 also stores the reduction ratio of the display image based on the display image information generated from the HTML document. The work area includes a storage area similar to the work area of the transmission data generation unit 112, and further includes a first acquisition unit 221.
1 generated based on the HTML document obtained from 1
A storage area for temporarily storing display image information for a screen is provided.

The transmission data generation unit 2213 generates first display image information and link information, which will be described later, from the HTML document obtained by the first obtaining unit 2211, and generates the first display image information and link information, which will be described later, from the image information obtained by the second obtaining unit 2212. 2 Generate display image information. Specifically, the transmission data generation unit 2213 extracts one file of the HTML document from the buffer in the first acquisition unit 2211 and stores the extracted HTML document in the file storage area in the work area. Next, the content of the HTML document is interpreted in the same manner as the transmission data generation unit 112,
According to the interpretation result, the display character string is converted into an image or the designated image information is decompressed to generate display image information representing those display images. Further, the display image information of the portion generated by converting the display character string into an image or the display image information of the image generated by expanding the designated image information is stored in the work area each time the image is generated. It is added to the area sequentially and stored.

When the transmission data generation unit 2213 interprets the end of the extracted HTML document and generates corresponding display image information and link information, the transmission data generation unit 2213 displays the display image information stored in the holding area in the work area. Is reduced by the ratio stored in the data conversion table storage unit, and first display image information representing the reduced display image is generated. The generated first display image information is stored in the display image information storage area in the display image information storage unit 123.

The transmission data generation unit 2213 recalculates the cursor display position of the hot spot in the reduced display image, and recalculates the XY coordinates of the hot spot information in the link information storage unit 125. Update to a value. Next, image information of one file is extracted from the second acquisition unit 2212, second display image information is generated from the extracted image information, and the generated second display image information is added and stored in the display image information storage area. . It is assumed that the image information file stored in the second external database 2222 is created in a display size and a format that can be used as it is as the second display image information.

As described above, transmission data generation section 221
Reference numeral 3 denotes first display image information and link information generated according to an HTML document of one file in the first acquisition unit 2211 and second display image information generated from image information of one file in the second acquisition unit 2212 When transmission data for one file is generated from the above, an identification number corresponding to the generated display image information and link information is added.

Hereinafter, transmission data is generated for each file in the same manner. FIG. 24 shows a transmission data generation unit 221.
FIG. 4 is an explanatory diagram showing an example of transmission data generated by No. 3; FIG. 24A is an explanatory diagram illustrating the contents of the first display image information 2401 using a display image displayed based on the first display image information 2401. FIG. 24 (b)
FIG. 4 is an explanatory diagram showing audio information associated with first display image information 2401. FIG. 24C shows the link information 240
FIG. 4 is an explanatory diagram showing the contents of No. 3;

The transmission data 2400 is stored in the first acquisition unit 221
1 obtained from the HTML document 301 of FIG. 2 and audio information “Weather. au ”and the image information 401 of FIG. 3 and FIG. 2 acquired from the second acquisition unit 2212.
3 image information 2301. The display image represented by the first display image information 2401 is the same as the display image based on the image display image information 801 of FIG. 8 generated by the transmission data generation unit 112, which is reduced at a predetermined ratio. The display image represented by the second display image information 2402 is the same as that by the image information 2301 acquired from the second acquisition unit 2212. The first display image information 2401 and the second display image information 2402 constitute display image information for the transmission data 24001 file, and a one-screen display image representing the first page of the WWW homepage is displayed.

The XY coordinates of the hot spot information shown in the row 2411 of the link information 2403 are obtained by updating the XY coordinates shown in the row 812 of the link information 803 in accordance with the reduction ratio. The XY coordinates of the hot spot information shown in row 2412 are the same as the XY coordinates of row 813 of link information 803.
The Y coordinate is similarly updated. FIG. 25 shows FIG.
13 is an explanatory diagram showing a display image of an initial screen displayed on a display unit 154 based on transmission data 2400 of FIG.

As shown in FIG. 25, display image 2500 includes display image information represented by first display image information 2401 and second display image information 2402 in accordance with the hot spot information shown in row 2411 of link information 2403. At the middle display position (080, 480), a cursor figure 2501 corresponding to the cursor number "1" is displayed. A cursor figure 2501 indicates a selected state of the cursor number “1”. Similarly, according to the hot spot information in the row 2412 of the link information 2403, the display position (080, 560)
And a cursor graphic 25 corresponding to the cursor number "2".
02 is displayed. The cursor graphic 2502 indicates a non-selected state.

FIG. 26 is a flowchart showing an example of the procedure of transmission data generation processing of transmission data generation section 2213. The transmission data generation unit 2213 includes a first acquisition unit 221
It is checked whether there is an unprocessed HTML document in 1 (step S2601). If so, one file is extracted (step S2602), display image information is generated in the holding area, and link information is generated in the link information storage unit 125 in the same manner as the transmission data generation unit 112 of the first embodiment. (Step S2603).

The first display image represented by the display image information generated in the holding area is reduced at a predetermined ratio.
The display image information is generated and stored in the display image information storage unit 123 (step S2604). Calculating a cursor display position (X, Y) in the display image based on the first display image information;
The cursor display position (X, Y) of the hot spot information is updated based on the calculation result (step S2605).

The image information file is extracted from the second acquisition unit 2212 (step S2606), the second display image information is generated (step S2607), and added to the display image information storage area of the display image information storage unit 123 and stored. . An identification number is assigned to each of the display image information and the link information stored in the display image information storage unit 123 and the link information storage unit 125 (step S2608), and the process returns to step S2601.

As described above, according to data communication system 2200 of the present embodiment, different external database 2
In the case where the display image of the display unit 154 is synthesized according to a plurality of pieces of information supplied from the external database 221 and the external database 2222, the same effects as those of the data communication system 100 according to the first embodiment can be obtained. In the present embodiment, the data transmission device 2210 including the two information acquisition units of the first acquisition unit 2211 and the second acquisition unit 2212 has been described. However, the number of information acquisition units is not limited to two, and may be three. You may have the above-mentioned information acquisition part.

In the present embodiment, the second external database 2222 stores image information representing a display image of a predetermined display size as bitmap data, but the second external database 2222 stores the image information. The displayed image information does not necessarily need to be represented by bitmap data, and may be compression-coded according to a GIF format or another format. In this case, the transmission data generation unit 2213 decompresses and decodes the image information extracted from the second acquisition unit 2212 according to the format, and generates second display image information. Further, the second external database 2222 may be a WWW server different from the first external database 2221. In this case, the transmission data generation unit 2213
The second display image information and the corresponding link information are generated by the same processing as that for generating the first display image information and the corresponding link information.

(Third Embodiment) FIG. 27 is a block diagram showing a configuration of a data communication system 2700 according to a third embodiment of the present invention. In FIG. 27,
The same components as those of the data communication system 100 shown in FIG. 1 are denoted by the same reference numerals. Also, since these have already been described, the description will be omitted.

The data communication system 2700 includes a first data transmitting device 2710, a second data transmitting device 2720, and a data receiving device 2750. Data receiving device 2
750 includes reception separation section 2751, reception section 2752, and synthesis section 2753 instead of reception separation section 151 of data reception apparatus 150.

(First Data Transmission Device 2710) The first data transmission device 2710 has the same configuration as that of the data transmission device 2210, except that the first data transmission device 2710 does not include the second acquisition unit 2212. In addition, it is connected to an external database similar to the first external database 2221.

A transmission data generation unit (not shown) inside first data transmission device 2710 generates first display image information and link information in the same manner as transmission data generation unit 2213. The transmission data generation unit 2213 is different from the transmission data generation unit 2213 in that when the transmission data generation unit of the first data transmission device 2710 generates the first display image information, the area of the display image based on the second display image information is blank, and the first display This is to generate display image information including the image information and the blank area.

FIG. 28 is a diagram showing the HTML document 301 shown in FIG. 3 and audio information “Weather. FIG. 9 is an explanatory diagram showing transmission data 2800 generated by the first data transmission device 2710 from “au” and the image information 401 in FIG. 4.
FIG. 28A shows a first display image information 280 using a display image displayed based on the first display image information 2801.
FIG. 4 is an explanatory diagram showing the content of Example No. 1. FIG. 28B shows audio information associated with the first display image information 2801.
FIG. 28C is an explanatory diagram showing the contents of the link information 2803.

As shown in FIG. 28, the first display image information 2
801 and voice information and link information 2803 are shown in FIG.
Are the same as the first display image information 2401, audio information, and link information 2403 shown in FIG. Transmission data 2
800 is different from the transmission data 2400 in that the display area according to the second display image information 2402 is a blank area 2802.
It is said that.

(Second Data Transmission Device 2720) The second data transmission device 2720 includes a transmission data holding unit (not shown) and a timer (not shown) for measuring a fixed time, and is generated in a predetermined format in advance. The transmission data stored in the transmission data holding unit as a plurality of files is switched and stored in a file-by-file order at regular time intervals measured by the timer.

[0167] The method of transmitting transmission data by second data transmitting apparatus 2720 is the same as that of conventional TV broadcasting. In addition, the second data transmission device 2720 is a DVD (D
A recording medium playback device connected to the data receiving device 2750, such as an digital versatile disc (CD) playback device or a CD (Compact Disc) playback device, may be used.

FIG. 29 is an explanatory diagram showing transmission data 2900 transmitted from second data transmission device 2720.
As shown in FIG. 29, the transmission data 2900 has a display area based on the first display image information as a blank area 2901 having a certain size, and a display area based on the second display image information 2902 adjacent to the blank area 2901. Have been created.

(Data receiving device 2750) Receive separating section 2
Reference numeral 751 is the same as the reception separation unit 151 shown in FIG. 1 except that the display image information and the link information held in the reading buffer are output to the synthesis unit 2753.

Receiving section 2752 is realized by a conventional TV tuner or the like provided with an analog / digital conversion circuit, receives second display image information transmitted from second data transmitting apparatus 2720, and receives the received second display image information. The image information is output to the combining unit 2753. The synthesizing unit 2753 manages the display image information storage area for one screen provided in the reception data holding unit 152 by dividing it into an area for the first display image information and an area for the second display image information. Synthesizing unit 2753
Writes the first display image information of the transmission data input from the reception separation unit 2751 into an area for the first display image information, and writes the second display image information input from the reception unit 2752 into the second display image information. Write to the area for As a result, the display image 2500 shown in FIG. In the present embodiment, among the display images 2500, the display contents of the second display image are sequentially changed at the same time interval as the transmission data switching interval of the second data transmission device 2720.

As described above, according to the present embodiment, a display image represented by each display image information is displayed on one screen based on transmission data transmitted from a plurality of data transmission devices. In this case, the same effect as that of the data communication system 100 can be obtained. In addition,
In the present embodiment, reception separation section 2751 and reception section 275
2 shows the data receiving apparatus 2750 including two receiving units, but may include three or more receiving units.

Further, in the present embodiment, second data transmitting apparatus 2720 transmits transmission data consisting only of second display image information without multiplexing.
Similarly to 710, transmission data including the second display image information and its link information may be multiplexed and transmitted. In this case, receiving section 2752 includes reception separating section 2751
The combining unit 2753 combines display image information in the received data holding unit 152 from the first display image information and the second display image information in the same manner as described above.
As for the link information, in addition to the link information in the transmission data fetched by the reception separation unit 2751, the link information in the transmission data fetched by the reception unit 2752 is stored in the reception data holding unit 152.

In the first to third embodiments, the data receiving device 150 previously holds the graphic information representing the cursor graphic in the control unit 155, but the graphic information transmitted from the data transmitting device 110 is stored in advance. May be stored in the control unit 155. In this case, the data transmitting device and the data receiving device may be configured as shown in FIG. In this figure, an auxiliary figure adding unit 3211 is added to the data communication system 100 shown in FIG.
Has been added. The external database further stores graphic information indicating a cursor shape.

The auxiliary figure adding unit 3211 reads the figure information stored in the external database, and additionally stores the read figure information in the link information stored in the transmission data holding unit 113. Auxiliary figure acquisition unit 3253
Extracts only the graphic information from the link information stored in the received data holding unit 152 and stores the graphic information in the graphic information storage unit provided in the control unit 155. Next, only the graphic information is deleted from the link information stored in the received data holding unit 152. According to this configuration, the data transmission device 1
10 transmits the graphic information extracted from the external database to the data receiving device 150, and the data receiving device 3250
Can be changed to various types.

[0175]

The transmitting apparatus according to the present invention is a transmitting apparatus in a communication system for realizing interactivity using broadcast waves, wherein a first storage means for storing a plurality of image data corresponding to one frame; A second storage unit for storing control information indicating a link to other image data for each image data in the storage unit, and a transmission unit for repeatedly transmitting a predetermined number of image data together with the control information. According to this configuration,
The image data and the control information corresponding thereto are repeatedly transmitted, and the receiving apparatus can reliably receive the linked image data indicated in the control information in the next repeated transmission. Can be traced interactively from one to the next. As a result, it is possible to realize the interactivity for the user as if two-way communication is being performed by using the broadcast wave that can perform only one-way communication.

Furthermore, in the case of a general two-way communication server, since the load greatly varies depending on the amount of request from the receiving device, the response time from receiving a user operation to switching the display image varies greatly. . On the other hand, the present transmission apparatus can keep the cycle of repeated transmission constant since the load does not change. Therefore, the receiving apparatus can switch the image data within a certain response time, that is, within one cycle of repeated transmission at the longest.

Here, the transmitting means reads out a predetermined number of image data and corresponding control information repeatedly from the first and second storage means, the image data read by the reading means, and the control information. Multiplexing means for multiplexing the image data and the control signal by placing them in the video section and the retrace section of the television signal, respectively, and transmitting means for transmitting the multiplexed television signal as an analog broadcast wave. You may comprise. According to this configuration, an analog broadcast wave can be used to realize the above-described interactivity.

The image data and control information in the first and second storage means are digitized, and the transmission means stores a predetermined number of image data and corresponding control information in the first and second storage means. Reading means for repeatedly reading from the storage means, multiplexing means for converting image data and control information read by the reading means into digital data streams and generating a multiplexed stream obtained by multiplexing them, and digital broadcasting of the multiplexed stream. And transmitting means for transmitting as waves. According to this configuration, digital broadcast waves can be used for realizing the above-described interactivity.

Here, the first and second storage means store image data and control information together with an identifier, respectively, and the transmitting device further stores a plurality of audio data to which the same identifier as the image data is added. The transmitting means may transmit audio data together with the image data. According to this configuration, a set of image data and audio data can be transmitted, and more attractive interactivity can be realized.

Here, the transmitting device further obtains a plurality of page information including a link information indicating a link to another page, character information, and image information, and representing a page in which characters and images are arranged. A first obtaining unit that generates image data corresponding to one frame in which characters and images are arranged according to the obtaining unit that performs the processing and the character information and the image information in the obtained link information.
It may be configured to include a creating unit and a second creating unit that interprets link information in the acquired page information and creates control information indicating a link to other image data for each image data. According to this configuration, it is possible to convert page information acquired from the outside into image data and control information in a format suitable for broadcasting.

[0181] The acquisition means may acquire the page information from the World Wide Web on the Internet. According to this configuration, the transmitting device converts an HTML document or the like of a WWW server on the Internet into image data and control information and broadcasts the converted data. Therefore, it is possible to provide a user with an interactive program, such as surfing the Internet, using a television broadcast wave.

[0182] The receiving apparatus of the present invention is a receiving apparatus in a communication system for realizing interactivity using broadcast waves, wherein the broadcast waves include a plurality of different image data and another image data for each image data. Control information indicating a link to the broadcast wave is multiplexed and transmitted repeatedly, and the receiving apparatus separates one piece of image data and the corresponding control information from the broadcast wave, and a separated image. Holding means for holding data and control information; playback means for playing back the held image data and outputting a video signal; operating means for receiving a user operation for instructing switching of image data; and holding means for following the user operation And control means for controlling the separation means so as to separate the other image data indicated by the control information. According to this configuration, the receiving device receives the broadcast wave from the transmitting device, and separates, reproduces, and outputs the video data according to a user operation, so that interactivity can be realized. In addition, the receiving device can reliably receive the image data of the link destination indicated in the control information in the next repeated transmission, so that the image data of the link destination desired by the user can be interactively traced from one to the next. I can go. As a result, it is possible to realize the interactivity for the user as if two-way communication is being performed by using the broadcast wave that can perform only one-way communication. Furthermore, in the case of a general two-way communication server, the load greatly varies depending on the amount of request from the receiving device, so that the response time from when the user operation is received to when the displayed image is switched greatly varies. On the other hand, the present transmission apparatus can keep the cycle of repeated transmission constant since the load does not change. Therefore, the receiving apparatus can switch the image data within a certain response time, that is, within one cycle of repeated transmission at the longest.

Here, the separating means determines the identifier given to the image data in the broadcast wave, and the second distinguishing means determines the identifier given to the control information in the broadcast wave. Means for capturing the image data and the control information when the determination result of the first and second determination means is a specific identifier;
The image data and the control information captured by the capturing unit may be held. According to this configuration, the separation unit can separate the image data desired by the user and the control information corresponding to the image data by determining the identifier in the broadcast wave.

The image data and control information are transmitted as analog broadcast waves multiplexed in the video section and the retrace section of the television signal, respectively, and are displayed as images at fixed positions of non-display portions in the video section. The first identifier may be configured to recognize the identifier from an image at a fixed position of the non-display portion. The non-display portion of the analog broadcast wave can be transmitted by effectively using the identifier.

Here, the same identifiers are given to the image data and the corresponding control information, and the image data and the control information are converted into digital data streams and then multiplexed into a multiplex stream. The digital stream broadcast and converted as a wave is assigned first identification information for identifying image data and second identification information for identifying control information, and the multiplexed stream is composed of the first identification information and the identifier of the image data. Correspondence with
A map table indicating the correspondence between the second identification information and the identifier of the control information and a digital data stream are multiplexed; the holding unit further holds a map table separated by the separation unit; Specifies the identifier of the linked image data indicated in the control information, converts the identifier into first identification information and second identification information with reference to a map table, and outputs the first identification information and second identification information to the separating unit. 2 identifying information, the separating means includes: first determining means for determining first identifying information in the multiplexed stream; second determining means for determining second identifying information in the multiplexed stream; When the first and second identification information determined by the second determination unit match the designation of the control unit, the image data and the control information may be captured by a capture unit. According to this configuration, the transmitting apparatus transmits the map table using digital broadcast waves in addition to the image data and the control information, so that the receiving apparatus can easily assign an identifier of desired image data to each piece of identification information. The image data can be converted, and the discriminating means discriminates the identification information, and the capturing means captures the identification information, whereby the desired image data can be easily separated.

The control information is represented by at least one set of coordinates indicating a partial image area in the image data corresponding to the control information and an identifier of another image data as a link destination. Receives a user operation for specifying the image area in the image data, the control means,
An arrangement may be made wherein an identifier of another image data to be a link destination corresponding to the specified image area is read from the holding means and specified to the separating means.

Here, the separating means further separates the audio data, and the holding means holds the separated audio data.
The reproducing means may be configured to reproduce the held audio data and output an audio signal. According to this configuration, a set of image data and audio data can be received and reproduced, and more attractive interactivity can be realized.

The receiving method according to the present invention further includes a separating step of separating one image data and the corresponding control information from the broadcast wave, and a storing step of storing the separated image data and the control information in a memory. A reproduction step of reproducing image data stored in the memory and outputting a video signal, an operation step of receiving a user operation for instructing switching of the image data, and a control step stored in the memory according to the user operation. And a re-separation step of separating the determined image data from the corresponding control information.
This configuration also has the same effect as the above-described receiving device.

The receiving program storage medium of the present invention stores a receiving program comprising the above steps. When the microcomputer in the broadcast wave receiving apparatus executes the receiving program stored in the storage medium, the same effect as that of the receiving apparatus can be obtained. Further, the communication system of the present invention includes the above-mentioned transmitting device and the above-mentioned receiving device, so that the same effects as above can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data communication system 100 according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an example of an acquisition list 200 stored in an acquisition list storage unit 121.

FIG. 3 shows an HTML document 301 “Report. html ”. FIG.

FIG. 4 is image information 401 "Weather." Which is an example of an image displayed on the first page of the WWW homepage. g
It is an explanatory view showing "if".

FIG. 5 is an HTML document 501 “Tokyo. html "
FIG.

FIG. 6 shows an HTML document 601 “Osaka. html "
FIG.

FIG. 7 is an explanatory diagram showing an example of a link information table 700 stored in a data conversion table storage unit 122.

FIG. 8 shows an HTML document 301 and voice information “Weather”.
r. au "and the transmission data 800 of the first page of the WWW homepage 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 transmission data 1000 of a third page of a WWW home page generated from an HTML document 601.

FIG. 11 is an explanatory diagram showing a transmission data transmission method by a transmission unit 116.

FIG. 12 is a flowchart showing a schematic processing procedure of the entire data transmitting apparatus 110;

13 is a flowchart illustrating an example of a procedure of an information acquisition process performed by an information acquisition unit 111. FIG.

FIG. 14 is a flowchart illustrating an example of a procedure of transmission data generation processing performed by a transmission data generation unit.

FIG. 15 is a flowchart showing a specific example of a part of a processing procedure in step S1312 of FIG. 14;

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

FIG. 17 is an explanatory diagram illustrating an example of graphic information held by a control unit 155;

FIG. 18 shows a display unit 1 based on transmission data 800 of FIG.
FIG. 14 is an explanatory diagram showing a display image 1800 of an initial screen displayed on the screen 54.

19 is a diagram showing a display unit 1 based on transmission data 900 shown in FIG.
FIG. 14 is an explanatory diagram showing a display image 1900 of an initial screen displayed on the screen 54.

20 is an explanatory diagram showing a display image 2000 of an initial screen displayed on the display unit 154 based on the transmission data 1000 of FIG.

FIG. 21 is a flowchart illustrating an example of a procedure of a display control process of the control unit 155.

FIG. 22 is a block diagram showing a configuration of a data communication system 2200 according to the second embodiment of the present invention.

FIG. 23 shows image information 2301 “CM000” acquired by the second acquisition unit 2212 from the second external database 2222.
1. FIG. 4 is an explanatory diagram showing an example of “BMP”.

24 is an explanatory diagram illustrating an example of transmission data generated by a transmission data generation unit 2213. FIG.

25 is an explanatory diagram showing a display image of an initial screen displayed on the display unit 154 based on the transmission data 2400 in FIG.

FIG. 26 is a flowchart illustrating an example of a procedure of transmission data generation processing of a transmission data generation unit 2213.

FIG. 27 is a block diagram showing a configuration of a data communication system 2700 according to a third embodiment of the present invention.

FIG. 28 shows the HTML document 301 shown in FIGS. 2 and 3.
FIG. 9 is an explanatory diagram showing transmission data 2800 generated by the first data transmission device 2710 from the image data 401 and the image data 401.

FIG. 29 is an explanatory diagram showing transmission data 2900 transmitted from the second data transmission device 2720.

FIG. 30 is a diagram illustrating another configuration example of the data communication system.

FIG. 31 is an explanatory diagram of a multiplexed stream transmitted when using satellite digital broadcasting.

[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 receiving 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

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04N 7/081 H04N 7/08 Z 7/173 640 (72) Inventor Hidekazu Tanigawa 1006 Odakadoma, Kadoma, Osaka Matsushita Electric Within Sangyo Co., Ltd. (72) Inventor Yoshiyuki Miyabe 1006 Kazuma Kadoma, Osaka Pref.Matsushita Electric Industrial Co., Ltd. (72) Inventor Keiichi Miki 1006 Okadoma Kadoma, Kadoma, Osaka Pref. Inventor Takashi Sakao 1006 Kadoma, Kazuma, Kazuma, Osaka Prefecture F-term (reference) 5C025 BA11 BA13 BA14 BA25 BA27 BA28 CA09 CB08 DA01 DA04 DA05 5C063 AB01 AB03 BA20 CA23 CA36 DA01 DA07 DA13 EB32 EB33 EB36 EB40 5C064 BA01 BB07 BB10 BC07 BC18 BC23 BD02 BD05 BD08 BD09

Claims (39)

[Claims] 1. A transmitting apparatus in a communication system for realizing interactivity using broadcast waves, comprising: first storage means for storing a plurality of image data corresponding to one frame; A transmission device comprising: a second storage unit that stores control information indicating a link to another image data; and a transmission unit that repeatedly transmits a predetermined number of image data together with the control information. 2. The transmitting apparatus according to claim 1, wherein said transmitting means reads out a predetermined number of image data and corresponding control information from the first and second storage means repeatedly, and reads out the read data from the first and second storage means. Multiplexing means for multiplexing the image data and the control signal by placing the output image data and control information in the video section and the retrace section of the television signal, respectively, and for analog broadcasting of the multiplexed television signal A transmission unit for transmitting the wave. 3. The transmitting device according to claim 1, wherein said first,
Image data and control information in the second storage means are digitized, and the transmission means reads out a predetermined number of image data and the corresponding control information repeatedly from the first and second storage means, A multiplexing unit that converts the image data and control information read by the reading unit into digital data streams, respectively, and generates a multiplexed stream obtained by multiplexing them; and a transmitting unit that transmits the multiplexed stream as digital broadcast waves A transmission device characterized by the above-mentioned. 4. A transmitting device in a communication system for realizing interactivity using broadcast waves, wherein the transmitting device corresponds to one frame,
A first storage unit that stores a plurality of image data to which an identifier is assigned, and a plurality of units that correspond to the image data in the first storage unit, indicate a link to another image data, and are assigned the same identifier as the corresponding image data. A second storage unit for storing the control information, and a transmission unit for repeatedly transmitting a predetermined number of image data together with the control information. 5. The transmitting apparatus according to claim 4, wherein said control information is represented by an identifier of linked image data. 6. The transmitting apparatus according to claim 5, wherein the transmitting unit repeatedly reads out all the sets from the first and second storage units as one set of the image data and the control information to which the same identifier is assigned. A multiplexing unit that multiplexes the image data and the control signal by placing the image data and the control information read by the reading unit in the video section and the retrace section of the television signal, respectively; Transmitting means for transmitting the television signal as an analog broadcast wave. 7. The transmitting apparatus according to claim 6, wherein said multiplexing means places an identifier represented as an image at a fixed position of a non-display portion in said video section. 8. A transmitting apparatus according to claim 5, wherein said transmitting means sets a set of image data and corresponding control information from the first and second storage means, and reads out all the sets repeatedly. Multiplexing means for converting the image data and control information read by the reading means into digital data streams, respectively, and multiplexing them to generate a multiplexed stream; and transmitting means for transmitting the multiplexed stream as digital broadcast waves. A transmission device comprising: 9. A transmitting apparatus according to claim 8, wherein said multiplexing means comprises: a converting section for converting image data and control information into first and second digital data streams, respectively; An ID assigning unit that assigns and assigns first identification information for identifying image data and second identification information for identifying control information; a correspondence relationship between the first identification information and an identifier of the image data; A table creation unit for creating a map table indicating a correspondence relationship with the information identifier; and a multiplexing unit for multiplexing the first digital data stream, the second digital data stream, and the map table. Transmission device. 10. The transmitting apparatus according to claim 4, further comprising: an image storage means for storing an additional image; an image extracting means for extracting image data from the first storage means; and an additional image for extracting the additional image from the image storage means. A transmitting device for transmitting the image data to which the additional image is added and control information, the image transmitting device further comprising: an image adding unit that adds the extracted additional image. 11. A transmitting apparatus in a communication system for realizing interactivity using broadcast waves, wherein the transmitting apparatus represents a page in which characters and images are arranged, and includes link information indicating a link to another page, character information, Acquiring means for acquiring a plurality of page information including image information, and generating image data corresponding to one frame in which characters and images are arranged according to the character information and image information in the acquired link information. (1) interpreting link information in the acquired page information,
A second creation unit for creating control information indicating a link to another image data for each image data, a first storage unit for storing a predetermined number of image data created in the first creation unit, and a second creation unit. A transmission apparatus comprising: a second storage unit that stores created control information; and a transmission unit that repeatedly transmits a predetermined number of image data together with the control information. 12. The transmitting apparatus according to claim 11, wherein said acquiring means acquires said page information from a world wide web on the Internet. 13. The transmitting apparatus according to claim 11, wherein the first creating means assigns an identifier to the image data, and the second creating means assigns the same identifier as the image data to the control information paired with the image data. The transmission device, wherein the first and second storage units store image data and control information together with an identifier, and the control information is represented by an identifier of linked image data. 14. The transmitting apparatus according to claim 13, wherein said transmitting means sets the image data and the control information to which the same identifier is assigned from the first and second storage means as one set.
Reading means for repeatedly reading all the sets; multiplexing for multiplexing the image data and the control signal by placing the image data and control information read by the reading means in the video section and the retrace section of the television signal, respectively; And a transmitting means for transmitting the multiplexed television signal as an analog broadcast wave. 15. The transmitting apparatus according to claim 14, wherein said multiplexing means puts an identifier represented as an image at a fixed position of a non-display portion in said video section. 16. The transmitting apparatus according to claim 13, wherein said transmitting means sets a set of the image data and the corresponding control information from the first and second storage means and reads out all the sets repeatedly. Multiplexing means for converting the image data and control information read by the reading means into digital data streams, respectively, and multiplexing them to generate a multiplexed stream; and transmitting means for transmitting the multiplexed stream as digital broadcast waves. A transmission device comprising: 17. The transmitting apparatus according to claim 16, wherein said multiplexing means transmits the first and second image data and control information.
A conversion unit for converting the digital stream into a digital data stream; an ID assigning unit for assigning and assigning first identification information for identifying image data and second identification information for identifying control information to the converted digital stream; A table creation unit for creating a map table indicating the correspondence between the first identification information and the identifier of the image data, the correspondence between the second identification information and the identifier of the control information, a first digital data stream, and a second digital data A transmission device comprising: a multiplexing unit that multiplexes a stream and a map table. 18. The transmitting device according to claim 13, wherein the page information further includes audio information, and the transmitting device further generates audio data based on the audio information, and converts the image data into audio data corresponding to the image data. A third creating unit for assigning the same identifier as the data; and a third storage unit for storing audio data to which the identifier is assigned, wherein the transmitting unit transmits the audio data together with the image data. Transmission device. 19. The transmitting apparatus according to claim 18, wherein said transmitting means sets, as a set, image data, control information, and audio data to which the same identifier is assigned, from the first, second, and third storage means. A readout unit that repeatedly reads all the sets, and a set of image data, audio data, and control information read out by the readout unit are multiplexed into a television signal. The audio data is carried on the television audio signal. The image data and the control information include multiplexing means that are respectively mounted in a video section and a retrace section of a television video signal over a plurality of frames that take the reproduction time of the audio data, and multiplex the television signal into an analog broadcast wave. And a transmitting means for transmitting the data. 20. The transmitting apparatus according to claim 19, wherein said multiplexing means puts an identifier represented as an image at a fixed position of a non-display portion in said video section. 21. The transmitting apparatus according to claim 18, wherein said transmitting means sets, as a set, image data, control information, and audio data to which the same identifier is assigned, from the first, second, and third storage means. Reading means for repeatedly reading all the sets, image data read by the reading means,
It comprises multiplexing means for converting audio data and control information into digital data streams, respectively, and multiplexing them to generate a multiplexed stream, and transmitting means for transmitting the multiplexed stream as digital broadcast waves. Transmission device. 22. A transmitting apparatus according to claim 21, wherein said multiplexing means converts image data into a first digital data stream, control information into a second digital data stream, and audio data into a third digital stream. A first identification information for identifying image data for the first digital stream, a second identification information for identifying control information for the second digital stream,
A third digital stream for identifying audio data;
An ID assigning unit that assigns and assigns identification information; a correspondence between the first identification information and the identifier of the image data; a correspondence between the second identification information and the identifier of the control information; A table creation unit for creating a map table indicating a correspondence relationship between the first and third digital data streams, and a multiplexing unit for multiplexing the first to third digital data streams and the map table. 23. The transmitting apparatus according to claim 11, further comprising: an image storage unit for storing the image; an image extracting unit for extracting the image from the image storage unit; and image data created by the first creating unit. A transmitting apparatus, comprising: image adding means for adding an image, wherein the transmitting means transmits image data to which the image is added and control information. 24. A receiving apparatus in a communication system for realizing interactivity using broadcast waves, wherein the broadcast waves include a plurality of different image data and a control for each image data indicating a link to another image data. Information is multiplexed and repeatedly transmitted, the receiving device separates one image data from the broadcast wave and control information corresponding thereto, and separates the separated image data and control information from the broadcast wave. Holding means for holding, playback means for playing back the held image data and outputting a video signal, and control means for receiving a user operation for instructing switching of the image data; A receiving device for controlling a separating unit so as to separate other image data shown. 25. The receiving apparatus according to claim 24, wherein the same identifier is assigned to the image data and the corresponding control information, wherein the control information is represented by an identifier of a linked image data. Separating means for determining an identifier given to the image data in the broadcast wave;
A second determining means for determining an identifier added to the control information in the broadcast wave, and, when the determination result of the first and second determining means is a specific identifier, fetching the image data and the control information A receiving device, wherein the capturing unit and the holding unit hold the image data and the control information captured by the capturing unit. 26. The receiving apparatus according to claim 25, wherein the image data and the control information are transmitted as analog broadcast waves multiplexed in a video section and a retrace section of a television signal, respectively. A transmitting device, wherein an identifier represented as an image is transmitted to a fixed position of a non-display portion, and the first determination unit recognizes the identifier from the image of the fixed position of the non-display portion. 27. The receiving apparatus according to claim 24, wherein the same identifier is assigned to the image data and the corresponding control information, and the image data and the control information are converted into digital data streams, respectively. The digital stream broadcasted as a digital broadcast wave multiplexed with the multiplexed stream, and the converted digital stream are assigned first identification information for identifying image data and second identification information for identifying control information. A digital data stream is multiplexed with a map table indicating the correspondence between the first identification information and the identifier of the image data and the correspondence between the second identification information and the identifier of the control information. Holding a map table separated by the means, wherein the control means identifies the identifier of the linked image data indicated in the control information. Constant and, by referring to the map table converts the identifier into first identifying information and second identification information,
The first identification information and the second identification information are designated to the separation means, and the separation means determines the first identification information in the multiplexed stream, and determines the second identification information in the multiplexed stream. When the first and second identification information determined by the first and second determination means respectively match the specification of the control means, a capture means for capturing the image data and the control information is provided. A receiving device characterized by the above-mentioned. 28. The receiving apparatus according to claim 24, wherein the control information includes at least coordinates indicating a partial image area in the corresponding image data and an identifier of another image data to be linked. The operation unit is represented by one set, and the operation unit receives a user operation for designating the image area in the image data, and the control unit transmits the other image data corresponding to the designated image region as a link destination. A receiving device for reading an identifier from a holding unit and designating the identifier to a separating unit. 29. A receiving apparatus in a communication system for realizing interactivity using broadcast waves, wherein the broadcast waves include a plurality of different image data and a control for each image data indicating a link to another image data. The information and the audio data corresponding to the image data are multiplexed and repeatedly transmitted, and the receiving apparatus separates one image data from the broadcast wave and the control information and the audio data corresponding to the one image data. Means, holding means for holding the separated image data, control information, and audio data, and holding means for reproducing the held image data and audio data, a video signal, and a reproducing means for outputting an audio signal;
Receiving means for receiving a user operation for instructing switching of image data, and control means for controlling the separating means to separate other image data indicated by the control information of the holding means in accordance with the user operation apparatus. 30. The receiving apparatus according to claim 29, wherein the same identifier is given to the image data and the corresponding control data, and the control information is represented by an identifier of the linked image data. A separation unit configured to determine an identifier assigned to the image data; a second determination unit configured to determine an identifier assigned to the control information;
When the determination result of the second determination means is a specific identifier,
A receiving apparatus comprising: a capturing unit that captures the image data and the control information; and the holding unit stores the image data and the control information captured by the capturing unit. 31. The receiving apparatus according to claim 30, wherein said separating means further includes a sound separating means for separating sound data corresponding to image data, and said holding means includes a sound separated by the sound separating means. A receiving device for holding data. 32. The receiving apparatus according to claim 29, wherein the image data and the control information are transmitted as analog broadcast waves multiplexed in a video section and a return section of a television video signal, respectively, and the audio data is An identifier which is transmitted as a television audio signal and which is represented as an image at a fixed position of the non-display portion in the video section is transmitted, and the first determining means recognizes the identifier from the fixed position image of the non-display portion. A receiving device. 33. The receiving apparatus according to claim 29, wherein the same identifier is given to the image data, the corresponding control information and the audio data, and the image data, the control information and the audio data are respectively added to the digital data stream. After being converted, it is broadcast as a digital broadcast wave multiplexed into a multiplex stream, and the converted digital stream includes
First identification information for identifying image data, second identification information for identifying control information, and third identification information for identifying audio data are allocated, and the multiplexed stream includes the first identification information, the identifier of the image data, A digital data stream is multiplexed with a map table indicating the correspondence between the second identification information and the identifier of the control information, the correspondence between the third identification information and the identifier of the audio data, and Further, a map table separated by the separating unit is held, and the control unit specifies an identifier of the linked image data indicated in the control information, and refers to the map table to identify the identifier as the first identification information. Second identification information and third
The first identification information, the second identification information, and the third identification information are designated to the separation unit, and the separation unit includes a first determination unit that determines the first identification information in the multiplexed stream. A second discriminating means for discriminating the second identification information in the multiplexed stream, a third discriminating means for discriminating the third identification information in the multiplexed stream, and a third discriminating means discriminated by the first, second, and third discriminating means. A receiving device comprising: a capturing unit that captures the image data, the control information, and the audio data when the first, second, and third identification information respectively match the designation of the control unit. 34. The receiving apparatus according to claim 29, wherein the control information includes at least coordinates indicating a partial image area in the image data corresponding to the control information and an identifier of another image data to be linked. The operation unit is represented by one set, and the operation unit receives a user operation for designating the image area in the image data, and the control unit transmits the other image data corresponding to the designated image region as a link destination. A receiving device for reading an identifier from a holding unit and designating the identifier to a separating unit. 35. A receiving method in a receiving device used for a communication system for realizing interactivity using broadcast waves,
In the broadcast wave, different image data for each frame and control information indicating a link to another image data for each image data are multiplexed, and the receiving method includes one image data from the broadcast wave. A separation step of separating control information corresponding thereto, a storage step of storing the separated image data and control information in a memory, and a reproduction step of reproducing the image data stored in the memory and outputting a video signal. An operation step of receiving a user operation for instructing switching of image data, a determination step of determining other image data indicated by control information stored in the memory according to the user operation, a determination of the determined image data, Re-separation step of separating control information from control information. 36. A recording medium in which a receiving program is recorded in a receiving device used for a communication system for realizing interactivity by using broadcast waves, wherein the broadcast waves have different image data for each frame and different image data for each frame. Control information indicating a link to another image data is multiplexed, and the receiving program separates one image data and the corresponding control information from the broadcast wave, and a separation step. A storage step of storing image data and control information in a memory, a reproduction step of reproducing the image data stored in the memory and outputting a video signal, and an operation step of receiving a user operation instructing switching of image data, A determining step of determining other image data indicated by the control information stored in the memory according to a user operation; and the determined image data Recording medium; and a re-separation step for separating the control information corresponding thereto. 37. A communication system for realizing interactivity using broadcast waves, comprising a transmitting device and a receiving device, wherein the transmitting device has first storage means for storing a plurality of image data corresponding to one frame. A second storage unit that stores control information indicating a link to another image data for each image data in the first storage unit.
Storage means, and transmission means for repeatedly transmitting a predetermined number of image data together with control information, wherein the receiving device separates one image data and corresponding control information from the broadcast wave; Holding means for holding the obtained image data and control information, playback means for playing back the held image data and outputting a video signal, and control means for receiving a user operation instructing switching of image data, A communication system for controlling a separating unit to separate other image data indicated by control information of a holding unit according to a user operation. 38. The communication system according to claim 37, wherein a predetermined number of image data and control information corresponding to the predetermined number of image data are repeatedly read out from the first and second storage means, and read out by the reading means. Multiplexing means for multiplexing the image data and the control signal by placing the image data and control information in the video section and the retrace section of the television signal, respectively, and transmitting the multiplexed television signal as an analog broadcast wave A communication system comprising: 39. The communication system according to claim 37, wherein said image data and control information in said first and second storage means are digitized, and said transmission means includes a predetermined number of image data and corresponding data. Reading means for repeatedly reading the control information from the first and second storage means, and multiplexing for converting the image data and control information read by the reading means into digital data streams and generating a multiplexed stream obtained by multiplexing them. A communication system comprising: a multiplexing unit; and a transmitting unit that transmits a multiplexed stream as a digital broadcast wave.