JPH07288749A - Data encoding system, data production device, data decoding system and receiver using them - Google Patents

Abstract

PURPOSE:To select a program desired to be viewed next just by touching the part of numerals and characters corresponding to titles and items by performing modification set beforehand to the characters to which position information is to be added. CONSTITUTION:At the time of transmitting screen information provided with the position of the characters in FM teletext multiplex broadcasting, the modification set beforehand is performed to the characters to which the position information is to be added and all the numerals and characters are made possible to be used for the titles and the items. An index screen 101 is provided with an item information name area 102, title name areas 103 and plural program number areas 104 for displaying numbers and the characters required for selecting the respective programs indicated in the respective title name areas 103. Then, when a program number corresponding to the title name of the program to be displayed next is inputted, the next program specified by the program number is selected and the contents of the program are displayed at a display device. Thus, operability at the time of selecting the program is improved and safety is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data encoding method, a data production apparatus, a data decoding method and a receiver used in FM multiplex character broadcasting for mobile reception, and particularly to the position of a specific character on the screen. The present invention relates to a data encoding method, a data production apparatus, a data decoding method, and a receiver thereof that make it possible to show information.

SUMMARY OF THE INVENTION The present invention is an FM for mobile reception.
Data encoding system used when producing teletext data such as multiple teletext, data production apparatus using this data encoding system, and data decoding for decoding FM multiple teletext produced by this data production apparatus The present invention relates to a receiver that decodes the FM multiplex teletext by the data decoding method using a touch screen and a touchscreen and displays the teletext on a screen, which is necessary when selecting an FM multiplex teletext program on the touch screen. The display character is given a specific modification and broadcasted so that the touch position on the screen of the receiver can be detected, thereby improving the operability.

[0003]

2. Description of the Related Art FM multiplex character broadcasting for mobile reception is a new broadcasting medium in which digital signals are multiplexed in a gap between radio waves of FM broadcasting. Since data can be received in a mobile body such as an automobile, it is suitable for automobiles. In recent years, much attention has been paid to it as a means of providing traffic information services.

As an example of the traffic information program, traffic congestion information that informs the driver of the occurrence status of traffic congestion by a map and characters is considered as in the case of television multiple character broadcasting.

Further, the service area of the FM multiplex character broadcasting is almost the same as that of the FM broadcasting and is very wide, and many traffic information programs will be broadcast to this service area. The required program must be selected from a large number of traffic information programs.

Therefore, a program such as traffic information or news broadcast by such FM multiplex character broadcasting is added with a three-digit program number necessary for selecting a program, and the three-side program number on the receiver side. By inputting a digit program number, a program desired to be watched can be selected.

However, a receiver for displaying such traffic information and news is almost always mounted on a moving body such as an automobile, and a driver often performs a program selection operation. It has been pointed out that it is difficult to ensure sufficient safety if the driver selects a program while driving a car.

Therefore, as a method for solving such a problem, control data called a selection control data unit has been devised which can switch the screen displayed on the display device of the receiver by one operation.

This selection control data unit includes numbers (for example, 1 to 9) or characters (for example, a to f) displayed in the program and a screen (for example, a table of contents) where these numbers or characters are displayed. It is data that associates with the program number (for example, service identification code or 3-digit program number) displayed next to the screen), and the number (or character) and this number on the display device of the receiver. And a title (or item) corresponding to 1 to 1 are displayed, and the input device corresponding to the display device is operated, and the title (or item) indicating the program to be watched next is displayed in a one-to-one manner. When the value of the corresponding numeral or the like is input, the screen of the current program displayed on the display device is erased and the content of the next program specified by the numeral or the like is displayed on the display device. .

This facilitates program selection and improves safety when driving an automobile or the like.

[0011]

By the way, in such a selection control data unit, as an input device, a remote controller having a number / character key arranged near the display device or an input device is arranged on the screen of the display device. Since the touch screen and the like are used, there are the following problems.

That is, when a remote controller having a number / character key is used, after reading the number or character corresponding to the title of the next program to be viewed, which is displayed on the display device of the receiver. , It is necessary to shift the line of sight to the remote control side and operate the numeric keys and character keys arranged on this remote control, so it takes time to move the line of sight and the safety is impaired. There was a problem that it deteriorated.

When the touch screen arranged on the screen of the display device is used, numbers or characters indicating the program to be displayed next are displayed in the corners of the table of contents screen displayed on the display device. After displaying, read the number or character corresponding to the title of the program you want to watch next displayed on the table of contents screen, shift your line of sight to the number or character displayed in the corner of the table of contents screen, Since you have to touch the numbers and letters of the program you want to watch next, you can reduce the amount of movement of your line of sight compared to using the remote control, but you have to move your line of sight to some extent,
As a result, there is a problem that the safety is impaired and the operability is deteriorated.

Therefore, when such a touch screen is used, when a driver or the like touches a part of a number or a character displayed on the table of contents screen, this is detected by the touch screen and the next screen is viewed. It may be possible to determine the desired program, but in such a table of contents screen, the position of the numbers and characters that specify the next program is different for each program. You cannot select the program you want to watch.

When the table of contents screen data of the broadcast signal received by the receiver includes codes of numbers and characters, the receiver's receiver is based on the positions of these codes of numbers and characters in the table of contents screen data. The position of these numbers or characters in the table of contents displayed on the display device is determined, and when these numbers or characters are touched, this is detected by the touch screen and the next desired program is determined. It may be possible to do so, but in such a table of contents screen, there may be numbers and characters in the title and items, so even if a number or character appears on the table of contents screen, that number or character may appear. Is not limited to numbers or letters for program selection.

Therefore, in such a method, it is necessary to identify the numbers and characters for program selection so that these numbers and characters are not included in the title and item, and therefore it cannot be used in the title or item. Due to the limitation of numbers and letters, there is a problem that the broadcasting station loses the degree of freedom when producing programs.

In view of the above circumstances, the present invention allows all numbers and letters to be used in titles and items to increase the degree of freedom when producing programs on the broadcast station side, while displaying them on the display screen on the receiver side. You can select the program you want to watch next by simply touching the number or character that corresponds to the title or item of the program you want to watch next,
An object of the present invention is to provide a data encoding method, a data production apparatus, a data decoding method, and a receiver that can improve operability when selecting a program and improve safety.

[0018]

In order to achieve the above-mentioned object, the data coding method according to the present invention is as follows.
When the screen information including the position of the character is transmitted in the FM multiplex character broadcasting, the character to which the position information is to be added is characterized by being preset.

Further, in the data production apparatus according to the present invention, in claim 2, when the screen information including the position of the character is transmitted in the FM multiplex character broadcasting, the position information is added to the character to be added.
It is characterized by applying a preset modification.

The data encoding method according to the present invention is
In the third aspect, when the screen information including the position of the character is transmitted in the FM multiplex character broadcasting, a control code for moving back the operation position is added to the character to which the position information is to be added, after the code of this character. It is characterized in that the character code is added after the control code so that the character is double-written.

Further, in the data production apparatus according to the present invention, in claim 4, when the screen information including the position of the character is transmitted in the FM multiplex character broadcast, the character to which the position information is added is
A control code for retracting the operating position is added after the character code, and the character code is added after the control code so that the character is double-written.

Further, the data decoding system according to the present invention, in claim 5, is set in advance to the character obtained by the receiving operation when receiving the FM multiplex character broadcast, reproducing the screen information and displaying the screen. It is characterized by detecting whether or not there is a modification, determining that the modified character is a character for program selection, and selecting the program based on the position of the character on the screen. .

Further, in the receiver according to the present invention, in claim 6, when the FM multiplex character broadcast is received, the screen information is reproduced and the screen is displayed, the character obtained by the receiving operation is preset. It is characterized by detecting whether or not the character is modified, determining that the character thus modified is a character for program selection, and selecting the program based on the position of the character on the screen.

Further, in the data decoding system according to the present invention, in claim 7, when the FM multiplex character broadcast is received, the screen information is reproduced and the screen is displayed, the operation position is after the character obtained by the receiving operation. Detecting whether the backward control code and the character code are added, the control code and the character code are determined to be characters for program selection, and the character of the character on the screen is selected. The feature is that the program is selected based on the position.

Further, in the receiver according to the present invention, in claim 8, when the FM multiplex character broadcast is received and the screen information is reproduced and the screen is displayed, the operating position is moved backward after the character obtained by the receiving operation. It is detected whether the control code and the character code are added, the character provided with the control code and the character code is determined as a character for program selection, and the position of the character on the screen The feature is that the program is selected based on.

Further, in the receiver according to the present invention, in claim 9, when the FM multiplex character broadcast is received and the screen information is reproduced and the screen is displayed, the operating position is moved backward after the character obtained by the receiving operation. It is detected whether the control code and the character code are added, the character provided with the control code and the character code is determined as a character for program selection, and the position of the character on the screen When the area corresponding to is selected, the program is selected based on the characters corresponding to the selected area.

[0027]

In the above structure, in the data coding method according to claim 1, when the screen information including the position of the character is transmitted in the FM multiplex character broadcasting, the character to which the position information is to be added is modified in advance. By making all numbers and characters available in titles and items to increase the degree of freedom when creating programs on the broadcast station side, among the numbers and characters displayed on the receiver side display screen , You can select the program you want to watch next by simply touching the numbers or letters that correspond to the title or item of the program you want to watch next, which improves the operability when selecting a program and improves safety. Let

Further, in the data production apparatus according to claim 2, F
When transmitting the screen information including the position of the character in the M multiplex character broadcasting, by applying a preset modification to the character to which the position information is to be added, all the titles and items can be displayed in the same manner as in claim 1. While increasing the degree of freedom when creating programs on the broadcast side by enabling numbers and letters, the numbers and letters displayed on the display screen on the receiver side can be used for the title or item of the next desired program. Simply touch the corresponding numbers or letters to select the program you want to watch next, thereby improving the operability when selecting a program and improving safety.

According to the data encoding method of claim 3,
When transmitting screen information including the position of a character in FM multiplex character broadcasting, for a character to which position information is to be added, a control code for retreating the operating position is added after the code of this character, and after this control code, By adding a code for the character and modifying the character so that the character is double-written, all numbers and characters can be used in the title and items to make it possible to create a program on the broadcasting station side, as in the case of claim 1. While increasing the degree of freedom, you can touch the number or character corresponding to the title or item of the next program you want to see, out of the number or character displayed on the receiver's display screen. By selecting the desired program, the operability at the time of selecting the program is improved, and the safety is improved.

Further, in the data production apparatus according to claim 4, F
When transmitting the screen information including the position of the character in the M multiplex character broadcasting, for the character to which the position information is to be added, a control code for retreating the operating position is added after the code of this character, and after this control code, By adding a code for the character and modifying the character so that the character is double-written, all numbers and characters can be used in the title and items to make it possible to create a program on the broadcasting station side, as in the case of claim 1. While increasing the degree of freedom, you can touch the number or character corresponding to the title or item of the next program you want to see, out of the number or character displayed on the receiver's display screen. By selecting the desired program, the operability at the time of selecting the program is improved, and the safety is improved.

According to the data decoding method of claim 5, F
When the M-multiplexed character broadcast is received, the screen information is reproduced, and the screen is displayed, it is detected whether or not the character obtained by the receiving operation has a preset modification, and this modification is performed. Existing characters are judged as characters for program selection,
By selecting a program based on the position of the character on the screen, all numbers and characters can be used in titles and items, and the degree of freedom in program production on the broadcasting station side can be increased, as in claim 1. While raising it, just touch the number or letter corresponding to the title or item of the next program you want to see among the numbers or letters displayed on the receiver's display screen to see the program you want to see next. By selecting the program, the operability at the time of selecting the program is improved, and the safety is improved.

Further, in the receiver of claim 6, when the FM multiplex character broadcasting is received, the screen information is reproduced and the screen is displayed, the characters obtained by the receiving operation are modified in advance. Is detected, the character with this modification is determined to be a character for program selection, and the program is selected based on the position of the character on the screen. While increasing the degree of freedom when creating programs on the broadcast side by enabling all numbers and characters in titles and items, I want to see the next of the numbers and characters displayed on the display screen on the receiver side. By simply touching the numbers or letters corresponding to the program titles and items, the user can select the program to watch next, thereby improving the operability when selecting a program and improving safety.

According to the data decoding method of claim 7, F
When receiving M-multiplex character broadcasting, reproducing screen information and displaying the screen, it is detected whether or not a control code for retreating the operating position and the code of the character are added after the character obtained by the receiving operation. However, the characters to which the control code and the character code are given are determined to be characters for program selection, and the program is selected based on the position of the characters on the screen. , While enabling all numbers and letters in titles and items to increase the degree of freedom when creating programs on the broadcast station side, the next one of the numbers and letters displayed on the display screen on the receiver side is displayed. By simply touching the numbers or letters corresponding to the title or item of the desired program, the program to be watched next can be selected, thereby improving operability when selecting a program and improving safety.

Further, in the receiver of claim 8, when the FM multiplex character broadcast is received, the screen information is reproduced and the screen is displayed, the character obtained by the receiving operation is followed by a control code for retreating the operation position. It is detected whether or not the character code is added, the control code and the character coded are determined to be characters for program selection, and the program is based on the position of the character on the screen. By selecting, the same as in claim 1, all numbers and letters can be used in titles and items to increase the degree of freedom when creating programs on the broadcast station side, while displaying on the display screen on the receiver side. Of the displayed numbers and characters, you can select the program you want to watch next by simply touching the number or character corresponding to the title or item of the program you want to watch next. Facing By, to improve the safety.

Further, in the receiver of claim 9, when the FM multiplex character broadcast is received, the screen information is reproduced and the screen is displayed, the character obtained by the receiving operation is followed by the control code for retreating the operation position. It is detected whether or not the character code is added, the control code and the character coded character are determined to be characters for program selection, and an area corresponding to the position of the character on the screen is detected. When is selected, the program is selected on the basis of the characters corresponding to the selected area, so that all numbers and characters can be used in the title and items, and the broadcast station side While increasing the degree of freedom when creating a program, just touch the number or letter corresponding to the title or item of the next program you want to see among the numbers or letters displayed on the receiver's display screen. , To select the program you want to watch, this by to improve the operability at the time of program selection, to improve the safety.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to a detailed description of a data encoding system, a data producing device, a data decoding system and a receiver according to the present invention, an ordinary selection control data unit used on the receiver side of the present invention will be described first. .

<< Description of Selection Control Data Unit >> In FM multiplex broadcasting, control data called a selection control data unit may be added to a program for broadcasting so that the program can be easily selected and can be safely operated by a mobile body. Invented
In order to use the selection control data unit for program selection, the program displayed on the screen needs to display numbers or letters for program selection. FIG. 8 is an example of a table of contents screen, and numbers 1 to 6 are numbers for program selection. The selection control data unit is data indicating the relationship between this number and the program (service identification code or 3-digit program number) to be displayed next when this number is selected. The operation of the receiver using the selection control data unit will be described below using the table of contents screen of FIG. 8 as an example.

The table of contents screen 101 includes an item information name area 102 for displaying the name of the screen and the table of contents screen 101.
A plurality of title name areas 103 for displaying the names of the next screens that can be selected, and the title name areas 103 are arranged in a one-to-one correspondence with the respective title name areas 103.
The program number area 104 for displaying the numbers and characters necessary for selecting each program displayed in No. 03 is input, and the program number corresponding to the title name of the program to be displayed next is input. Then, the next program designated by this program number is selected and the contents of this program are displayed on the display device.

For example, if the numeral "1" is selected from the numerals "1" to "6" displayed in each program number area 104, the numeral "1" is paired with the numeral "1" as the next program. 1
If the traffic information program corresponding to is selected and the number "2" is selected, the news program corresponding to the number "2" in a one-to-one correspondence is selected as the next program.

When a traffic information program is selected, for example, an item information name area 112 for displaying the name of the screen as shown in FIG. 9 and the name of each section map which is the next screen selectable on this screen, etc. A selection screen 111 having a plurality of segmented map name areas 113 for displaying is displayed. With the selection screen 111 displayed, one of the segmented map names displayed in each segmented map name area 113 is displayed. One
For example, when "Southern Tokyo" is selected and the number "6" indicated by the program number "" in the same frame as "Southern Tokyo" is input, the numbers "6" and 1
The division map of "Southern Tokyo" corresponding to the pair 1 is selected and displayed on the display device.

<< Description of Data Production Device and Encoding Method Thereof >> Next, a data production device on the broadcast station side for performing FM multiplex character broadcasting to a receiver on the mobile side using such a selection control data unit, and The encoding method will be described.

First, as shown in FIG. 1, in the data production device 2 which is provided on the side of the broadcasting station 1 and produces teletext data to be multiplexed into the FM multiplex teletext, on the receiver 3 side,
In order to distinguish the numbers and characters for display only from the numbers and characters for program selection, the numbers and characters for display and the numbers and characters for program selection are used using the encoding method described below. To identify.

That is, in the encoding method used in this embodiment, for the numbers and characters for display, character data is generated using a normal character code, for example, JIS code, and the numbers and characters for program selection are used. With respect to, these numbers and characters are encoded with specific modifications.

In this case, as the numbers for program selection,
Numbers from "0" to "9" (preferably from "1" to
"9" number, "1" to "6" number, or "1" to
The numeral "4") is used, and the alphabets "a" to "f" (preferably the alphabets "a" to "c") are used as characters for program selection.

As specific modifications to these numbers and characters, for example, as shown in the table of FIG. 2, characters for selecting a program are modified to use normal characters as shown in (a), and (b) is modified. Modifications using bold letters as shown, (c)
Modification using italic characters, modification using underlines as shown in (d), modification using enclosures as shown in (e), modification enclosing numbers in circles as shown in (f), (g ) As shown in the romanization is used.

However, in such a modification method, since the character with the predetermined modification is used as the character for program selection, the modification cannot be used for giving the accent of the presentation or the change of the presentation, and the character of the production cannot be obtained. Freedom is limited.

For this reason, it is desirable to use modification by double writing numbers and characters as shown in FIG. 2 (h). In this modification method, since the same character is written twice, the display number or character and the program selection number or character can be distinguished from each other without giving any restriction on the display.

In fact, when the modification method shown in FIG. 2 (h) is used, the receiver 3 as shown in FIG. 3 (a).
When the character information displayed on the display device on the side is "1: traffic information", the character code string is "23312."
127 3872 444C3E70 4A73 "is transmitted, whereas when the character information displayed as shown in FIG. 3B is" 1: traffic information ", the character code string is" 2331 082331 2127 3872 ".
444C 3E70 4A73 "is transmitted,
The display position is returned to the previous one by the control code "08" indicating the backward movement of the operating position displayed in (b), and the preceding display character "1" is simply written twice.

Therefore, the character "1" displayed before the character ": traffic information" is displayed on the receiver 3 for program selection without causing any discomfort on the display on the receiver 3 side. You can recognize that it is a number.

<< Explanation of Receiver and Decoding Method Thereof >> On the other hand, when the receiver 3 provided on the mobile side receives and displays the FM multiplex character broadcast, as shown in FIG. The program is displayed in characters using the display surface 6 of the display device 5 (see FIG. 1) capable of displaying characters in 8 rows × 15.5 columns.

Then, the character codes sent by the FM multiplex character broadcast are sequentially decoded, arranged in the order of reception thereof, and the contents of the table of contents screen 8 are displayed by numbers and characters for display as shown in FIG. , Detecting modified characters (numbers or characters for program selection) in the character code, and a part of the area where these numbers or characters for program selection exist (area indicated by diagonal lines in the figure) Is determined as each program number area 9.

After that, if any of the program number areas 9 on the display device 5 of the receiver 3 is touched by the driver, the touch screen 7 (Fig. 1)), the selection control data unit 4 determines the program number corresponding to this detection result, selects the next program corresponding to this program number, and displays the contents of this program on the display device. 5 Display on top.

In this case, for example, the traffic information program is selected by the driver, and "1" corresponding to this traffic information program is selected.
If the program number area 9 displaying is touched, as in the case of the above-mentioned table of contents screen 8, the character codes sent by the FM multiplex character broadcasting are sequentially decoded and arranged in the order of reception, As shown in FIG. 5, the contents of the selection screen 10 are displayed by numbers and characters for display, and the modified characters (numbers and characters for program selection) in the character code are detected to select these programs. The area for one character in which the numbers and characters are present (the area indicated by diagonal lines in the figure)
Is determined as each program number area 11.

After that, if any of the program number areas 11 on the display device 5 of the receiver 3 is touched by the driver, the touch screen 7 provided on the front surface of the display device 5 touches the touch position. Is detected,
The program number corresponding to this detection result is determined by the selection control data unit 4, the next program corresponding to this program number is selected, and the contents of this program are displayed on the display device 5.

<< Explanation of the Effect of the Embodiment >> As described above, in this embodiment, the numbers and characters for program selection are modified by the data production device 2 provided on the broadcast station 1 side and provided on the mobile body side. The number or character modified by the receiver 3 is recognized as a number or character for program selection, and when the area for one character in which these number or character is displayed is touched, the touch screen 7 touches it. Since the position is detected and the program number is selected, all the numbers and characters can be used in the title and items to increase the degree of freedom when creating a program on the side of the broadcasting station 1 and the side of the receiver 3 Of the numbers and characters displayed on the display screen of, you can select the program you want to watch next by simply touching the number or character corresponding to the title or item of the program you want to watch next. By this Improved operability during program selection Te, it is possible to improve safety.

<< Explanation of Other Embodiments >> In the above-described embodiments, the program selection areas 9 and 11 are defined as areas for one character having numbers or characters for program selection displayed on the display device 5. However, as shown in FIGS. 6 and 7, the screen on the display device 5 may be divided into a plurality of areas, and the divided areas may be used as program selection areas 13 and 15, respectively. good.

In this case, the table of contents screen 12 shown in FIG.
Since it is estimated that the program title following the program selection numbers and characters is displayed, not only the one-character area where the program selection numbers and characters are present, but one line horizontally All the program selection areas 13 are selected, and in the selection screen 14 shown in FIG. 7, program selection is performed for each of the entire segment map name areas that display the names of each segment map, which is the next screen that can be selected by the selection screen 14. Area 15 is set.

By doing so, the touch input range can be expanded and the operability of touch input can be greatly improved.

In each of the above-mentioned embodiments, the touch screen 7 is used to input the program number. However, a cursor is displayed on the display device 5, and the driver can be selected depending on the position of the cursor. It is also possible to determine the program selection area selected in the above.

[0060]

As described above, according to the present invention, in claims 1 to 9, all numbers and characters can be used in titles and items to increase the degree of freedom when producing programs on the broadcasting station side. , Of the numbers and characters displayed on the display screen of the receiver side, just touch the number or character part corresponding to the title or item of the program you want to watch next to select the program you want to watch next As a result, the operability when selecting a program can be improved and the safety can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a transmission / reception system showing an embodiment of a data encoding system, a data production device, a data decoding system, and a receiver according to the present invention.

FIG. 2 is a table showing an example of character decoration used in the encoding system of the data production device shown in FIG.

FIG. 3 is a schematic diagram for explaining an example of a character code modified by the modification method shown in (h) of FIG.

4 is a schematic diagram showing an example of a table of contents screen decoded by a decoding operation of the receiver shown in FIG.

5 is a schematic diagram showing an example of a selection screen decoded by the decoding operation of the receiver shown in FIG.

FIG. 6 is a schematic diagram showing an example of a table of contents screen used in another embodiment of the data encoding system, the data production device, the data decoding system and the receiver according to the present invention.

FIG. 7 is a schematic diagram showing an example of a selection screen used in another embodiment of the data encoding system, the data production device, the data decoding system, and the receiver according to the present invention.

FIG. 8 is a schematic diagram showing an example of a table of contents screen used in an FM multiple character broadcast program.

FIG. 9 is a schematic diagram showing an example of a selection screen used in an FM multiple character broadcast program.

[Explanation of symbols]

 1 Broadcasting Station 2 Data Production Device 3 Receiver 4 Selection Control Data Unit 5 Display Device 6 Display Surface 7 Touch Screen 8 Table of Contents Screen 9 Program Number Area 10 Selection Screen 11 Program Number Area 12 Table of Contents Screen 13 Program Number Area 14 Selection Screen 15 Programs Number area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Yamada 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside the Broadcasting Technology Research Institute, Japan Broadcasting Corporation

Claims (9)

[Claims] 1. A data encoding method, wherein when transmitting screen information including character positions in FM multiplex character broadcasting, a character to which position information is to be added is subjected to preset modification. 2. A data production apparatus, characterized in that when transmitting screen information including a position of a character in FM multiplex character broadcasting, a character to which position information is to be added is subjected to preset modification. 3. When transmitting screen information including a character position in FM multiplex character broadcasting, a control code for retreating the operating position is added to a character to which position information is to be added, after the code of this character, and A data encoding method, wherein the character code is added after the control code so that the character is double-written. 4. When transmitting screen information including the position of a character in FM multiplex character broadcasting, for a character to which position information is to be added, a control code for moving back the operation position is added after the code of this character and A data production apparatus, characterized in that the character code is added after the control code so that the character is double-written. 5. When an FM multiplex character broadcast is received, screen information is reproduced and a screen is displayed, it is detected whether or not the character obtained by the receiving operation has a preset modification, A data decoding method, characterized in that a modified character is determined as a character for program selection, and the program is selected based on the position of the character on the screen. 6. When an FM multiplex character broadcast is received, screen information is reproduced and a screen is displayed, it is detected whether a character obtained by the receiving operation has a preset modification, A receiver characterized by determining a character that has been modified as a character for program selection and selecting a program based on the position of the character on the screen. 7. When a FM multiplex character broadcast is received, screen information is reproduced and a screen is displayed, a control code for retreating the operating position and a code for the character are added after the character obtained by the receiving operation. It is determined whether or not the control code and the character code are applied as characters for program selection, and the program is selected based on the position of the character on the screen. Data decryption method. 8. A control code for retreating an operating position and a code for the character are added after the character obtained by the receiving operation when receiving the FM multiplex character broadcast, reproducing the screen information and displaying the screen. It is determined whether or not the control code and the character code are applied as characters for program selection, and the program is selected based on the position of the character on the screen. And receiver. 9. A control code for retreating the operating position and a code for the character are added after the character obtained by the receiving operation when the FM multiplex character broadcast is received and the screen information is reproduced to display the screen. Whether or not the control code and the character code are determined to be characters for program selection, and the area corresponding to the position of the character on the screen is selected, the character is selected. A receiver characterized in that a program is selected based on a character corresponding to a region.