JPH10200432A - Fm multiplex broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an FM multiplex broadcast receiver which gives easily understandable continuous contents even when display screens are changed. SOLUTION: This FM multiplex broadcast receiver 1 is provided with a front end 12 which receives FM multiplex broadcast and acquires a data packet after error correction, an intermediate amplifier/FM detecting circuit 14, a filter circuit 18, an LMSK demodulation circuit 20, an error detecting and correcting circuit 24, a CPU 30 which acquires each page data from the data packet and performs display, RAM 32 for data storage, RAM 34 for display and a display part 36. The CPU 30 writes a 1st page display data on the RAM 34 to perform a 1st page screen display, also writes a 2nd page display data to be next displayed on the RAM 34 and shows an intermediate page that partially includes each page when a page turn-over key is pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM multiplex broadcast receiver for receiving a program consisting of a plurality of pages included in an FM multiplex broadcast and displaying each page.

[0002]

2. Description of the Related Art In FM multiplex broadcasting using the DARC (Data Radio Channel) system, characters and graphics are converted into digital data and encoded, and a multiplexed signal having a subcarrier frequency of 76 kHz is frequency-multiplexed into a stereo baseband signal. FM
Modulated. Currently, three types of service levels from level 1 to level 3 are assumed for characters and graphics to be broadcast. Level 1 is the text (15 characters x 2
This is a service for receivers that can display (line) and header lines, and mainly uses information in characters. Level 2 is a service for receivers capable of displaying a text (15.5 characters × 8 lines) and a header line, and is suitable for sending figures and maps. Level 3 provides a service of traffic information data for a car navigation system provided with a map display by a CD-ROM.

FIG. 15 is a diagram showing a display example in a conventional FM multiplex broadcasting receiver. As an example, a display example corresponding to the level 1 service described above is shown. FIG. 1A shows a display example of a program composed of a plurality of pages (for example, two pages). The first and second pages of the display are respectively provided with a “page forward” key or a “page forward” key provided in the receiver. It can be switched by pressing the "page return" key. As described above, when there is much information included in each program, by switching the screen of a plurality of pages,
Users can get the information they want to see.

[0004]

By the way, in the above-mentioned conventional FM multiplex broadcast receiver, it is sufficient that the character information included in the display screen of each page constituting the program is completed for each display screen. If the sentence is cut off halfway and continues to the display screen of the next page, it may not be easy to understand the contents simply by looking at the screen after switching. For example, as shown in FIG. 15B, when the text on the second line is interrupted in the middle, especially in the middle of a word and continues to the next page, the tail of the screen before switching is not carefully observed. Therefore, accurate information cannot be transmitted just by looking at the display screen on the next page. In particular, when considering an FM multiplex broadcast receiver to be mounted on a vehicle, since the character information displayed on the screen is seen within a short stop time, the tail of the screen before switching is often overlooked.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an FM multiplex broadcast receiver which allows easy understanding of contents to be continued even when a display screen is switched. is there.

[0006]

In order to solve the above-mentioned problems, an FM multiplex broadcast receiver according to the present invention provides a method for switching character information for a plurality of pages having continuous contents for each page to display. , After displaying the first page, it displays an intermediate screen that is part of each of the first and next pages, and then displays the next page,
Even when the display contents are scrolled and the display screen is switched, the sentences do not become discontinuous, and the contents can be easily understood.

More specifically, the FM multiplex broadcast receiver partially displays each page screen including the character information corresponding to each of the plurality of continuous pages and the two-page continuous character information. And display switching means for switching the display by the display means in accordance with a predetermined operation in the order of a page screen, an intermediate screen, and a page screen. In particular, the page data for each page that contains text information includes
The display means includes a page number or selection control data necessary for specifying the next page having continuous contents, and the display means partially extracts character information for two pages having continuous contents based on these data. To create an intermediate screen.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An FM multiplex broadcasting receiver to which the present invention is applied, when receiving a program composed of a plurality of pages of character information, switches display of each page by scrolling in units of lines. There are features. Hereinafter, an FM multiplex broadcast receiver according to an embodiment will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
It is a figure showing the composition of M multiplex broadcast receiver. F shown in FIG.
The M multiplex broadcast receiver 1 includes a front end (F / E) 12, an intermediate frequency amplification / FM detection circuit (IF) for extracting stereo sound from an FM broadcast signal received by an antenna 10.
/ DET) 14, a noise canceller / stereo demodulation circuit (NC / MPX) 16, and a filter circuit 18 for separating and demodulating the FM multiplex broadcast data contained in the received FM broadcast signal, a LMSK (Level controlled Minimizer)
um Shift Keying) A demodulation circuit 20, a synchronization circuit 22, and an error detection / correction circuit 24 are provided. By performing various processes on the separated FM multiplex broadcast data, various information such as characters and graphics is displayed on the display unit 36. CPU3 to display
0, a data storage RAM 32, and a display RAM 34. Further, the FM multiplex broadcast receiver 1 includes an operation unit 40 having various operation keys for a user to perform an operation. For example, a "Page Forward" key and a "Page Back" key for switching between multiple display screens of the same program
Has a key.

The front end 12 includes an antenna tuning circuit, a high-frequency amplifier circuit, a local oscillator circuit, a mixing circuit, and the like. The front end 12 performs high-frequency amplification on an FM broadcast signal input from the antenna 10 and performs predetermined frequency conversion. I do. For example, when an FM broadcast signal of a desired frequency to be received is input to the front end 12, 10.7 MH
z is converted to an intermediate frequency signal. Intermediate frequency amplification / FM
The detection circuit 14 amplifies the intermediate frequency signal output from the front end 12, performs a tuning operation, and performs FM detection on the tuning result. Further, the noise canceller / stereo demodulation circuit 16 performs intermediate frequency amplification /
After removing a noise component included in the FM stereo composite signal after the FM detection output from the FM detection circuit 14, the L component and the R component of the stereo sound are separated.

The filter circuit 18 separates a multiplex signal contained in the signal after the FM detection.
As shown in FIG. 2, the signal after FM detection has a frequency of 76 kHz.
The preceding and following FM multiplex broadcast signals are included, and only this FM multiplex broadcast signal is extracted by the filter circuit 18.
The LMSK demodulation circuit 20 performs delay detection on the LMSK modulated signal, which is a multiplex signal output from the filter circuit 18, to reproduce a bit clock and demodulate a bit data string. The synchronization circuit 22 detects the block synchronization and the frame synchronization with respect to the bit data string output from the LMSK demodulation circuit 20.
Is a CRC for this synchronized bit data sequence.
(Cyclic Redundancy Check) to detect errors and correct any errors. For example,
Error correction is performed by a product code using the (272, 190) shortened difference set cyclic code in both vertical and horizontal directions, and error correction is performed with high probability.

The CPU 30 extracts group data and program data based on data (data packets) output from the error detection and correction circuit 24. The extracted program data is stored in the data storage RAM 32. The display RAM 34 stores bit data corresponding to a display image, and has, for example, a storage area corresponding to a display screen of two pages.
6 is displayed.

The front end 12, the intermediate frequency amplification / FM detection circuit 14, the filter circuit 18, the LMSK demodulation circuit 20, the error detection and correction circuit 24, the CPU 30, and the data storage RAM 32 serve as FM multiplex broadcast receiving means.
PU30, data storage RAM32, display RAM3
4. The display unit 36 is used as a display means by the CPU 30 and the display RA.
M34 corresponds to the display switching means.

Next, the hierarchical structure of FM multiplex broadcasting using the DARC system will be described. The hierarchical structure of the DARC to be processed by the FM multiplex broadcast receiver 1 includes a layer 1 for a transmission path, a layer 2 for error correction, a layer 3 for a data packet, a layer 4 for a data group, a program 4 Is included in the hierarchy 5.

The layer 1 of the transmission line corresponds to the signal after FM detection (baseband signal) output from the above-described intermediate frequency amplification / FM detection circuit 14. As shown in FIG. 2, the signal after FM detection has an FM of about 76 kHz.
A multiplex broadcast signal is included. Only the FM multiplex broadcast signal is separated by the filter circuit 18 and passed through the LMSK demodulation circuit 20 to obtain FM multiplex broadcast data corresponding to the FM multiplex broadcast signal.

Layer 2 for error correction shows a frame structure for performing error detection and error correction. FIG.
3 is a diagram showing a frame structure corresponding to layer 2. FIG. As shown in the figure, the FM multiplex broadcast data output from the LMSK demodulation circuit 20 is composed of a total of 272 blocks per frame, of which 190 blocks are blocks containing data packets, and the remaining 82 blocks are parity packets. It is a block containing. These 82 blocks are distributed among blocks including data packets.

Each block including a data packet is a 16-bit block identification code BIC (Block Iden).
tify Code), a data packet consisting of 176 bits of data, a 14-bit CRC code, and an 82-bit parity (horizontal code) for error detection and correction. Further, the block including the parity packet includes a 16-bit block identification code BIC, a 190-bit parity (vertical code) packet, and an 82-bit error correction parity (horizontal code).

The identification code of the first 13 blocks including the data packet is BIC1, and the identification code of the next 123 blocks including the data packet is BIIC.
C3, the identification code of the next 13 blocks including the data block is BIC2, and the identification code of the last 123 blocks including the data block is BIIC.
C3. The identification code of each block including the parity packet is BIC4.

The synchronization circuit 22 has a block identification code BIC.
Is detected for each block to achieve block synchronization, and BIC1 is placed next to the block identification code BIC4.
Is detected, frame synchronization is obtained every 272 blocks. Therefore, when the number of times the block identification code cannot be detected in such an order occurs at a predetermined rate, block synchronization is lost, and when frame synchronization is not achieved at a predetermined rate, frame synchronization is lost.

Further, since a block containing a data packet contains a CRC code and each block contained in one frame contains a parity (horizontal code) for error detection and correction. By using the parity, it is possible to perform a correction process after the error detection and correction circuit 24 detects an error. Error detection and correction circuit 2
4 outputs only data packets included in each block after error correction is performed in this manner.

Layer 3 shows the structure of a data packet, the details of which are shown in FIG. As shown in the figure, each data packet is configured to include a 32-bit prefix and a 144-bit data block.
The prefix at the beginning is added to identify a data block as information content, and the service identification S
I, decoding identification flag, information end flag, update flag, data group number, and data packet number. The service identification SI of the first four bits is used for identifying a program.

Layer 4 shows the structure of a data group formed by collecting a plurality of data blocks included in the data packet. As shown in FIG. 5, the data group includes a start code SOH, a data group link code DGL, a data group size, data group data, a length adjustment NULL, an end code, and a CRC. In this data group, data blocks having the same service identification SI, the same data group number, and the same update flag in the data packet of the layer 3 are the data blocks in which the information end flag is set in order from the data packet number “0”. It is arranged up to. One data group corresponds to one page of data displayed on the display unit 36.

Level 5 shows the structure of program data formed by collecting a plurality of data group data included in the above-mentioned data groups. As shown in FIG. 6, the program data is composed of a plurality of data groups.
The first data group is used as program management data, and the subsequent data group is used as page data. The program management data includes information related to the entire program such as a program number and the total number of program pages, and each page data includes information of each page displayed on the display unit 36. Each of the program management data and the page data has a common structure, and has a data header including an information separation code RS, a data header parameter, and data header data, and a data unit group following the data header.

FIG. 7 shows data header data (page data header data) included in the data header of page data.
It is a figure showing an example of. As shown in the figure, the page data header data includes a program number assigned to each program in the range of 0 to 255, and various information such as a page number in each program.

As shown in FIG. 8, each data unit constituting the data unit group includes an information separating code US,
The data unit includes a data unit parameter, a data unit size, a data unit link flag code DUL, and data unit data. The data unit parameter therein indicates the content of the data unit data.

FIG. 9 is a diagram showing a specific example of the data unit parameter. For example, considering page data corresponding to each page included in a level 1 service capable of displaying a body of 15 characters × 2 lines and a header line, this page data includes a data unit parameter 20H (H is 1
(Indicating a hexadecimal number) and a header sentence data unit of the data unit parameter 24H.

Generally, a continuous page number is assigned to each of the pages whose display is sequentially switched by the “page forward” key, and the page number of the page being displayed is indicated by the page header in the page header shown in FIG. The page to be displayed next can be specified by extracting from the inside and adding "1" to this.

As another method for specifying a page to be displayed next when the "page forward" key is pressed, there is a method using selection control data. As shown in FIG. 15 (A), when the program to be displayed is constituted by a plurality of pages which can be page-turned, or when the page to be displayed is a part of a response progress program including options, each page Includes a selection control data unit of the data unit parameter 36H in addition to the above-described header statement data unit and the like.

FIG. 10 is a diagram showing details of data unit data included in the selection control data unit. In the figure, the “key-in number” is the FM multiplex broadcast receiver 1
Corresponding to the number input by operating the operation unit 40 of
For example, it is any of 0 to 6, A, B, and C. here,
A corresponds to the case where the displayed page is moved next in the same hierarchy, B corresponds to the case where the displayed page is moved forward in the same hierarchy, and C corresponds to the case where the displayed page is returned to the upper hierarchy. "Destination page number" designates the page number of the next page for which the display is switched in accordance with the key-in number. "Destination program number"
Specifies the program number of the next page to switch the display according to the key-in number. "Destination service identification number"
The service identification SI of the next page whose display is to be switched according to the key-in number is specified.

The destination page designation mode "NPS" indicates a mode for designating a destination page. For example, "0
"0" indicates the same service identification SI and the page number in the program number as the destination with the corresponding "destination page number".
“01” designates a program number within the same service identification by a corresponding “destination program number”, and indicates a destination page number by a corresponding “destination page number”. “10” designates a destination program by a corresponding “destination program number” and a destination service identification by a “destination service identification number”, and indicates a destination page number by a corresponding “destination page number”.

Therefore, the above-mentioned "key-in number" is A, and the page number of the next page to be switched when the page feed key is pressed is the "destination page number".
In this case, by examining the selection control data, the corresponding page number of the next page can be obtained.

Next, the F of the embodiment shown in FIG.
The operation of the M multiplex broadcast receiver 1 will be described. For example, a description will be given by taking a service identification 2 program corresponding to level 1 as an example.

FIG. 11 is a diagram showing the relationship between the display screen of the FM multiplex broadcast receiver 1 of the present embodiment and the display RAM 34. The screen of the display unit 36 shown in FIG.
The page is shown, and the display unit 36 shown in FIG.
Screen shows the second page of the program. Conventionally, when the “page forward” key provided in the operation unit 40 is pressed while the first page screen shown in FIG. 11A is displayed, the second page screen shown in FIG. Is displayed, but in the FM multiplex broadcast receiver 1 of the present embodiment,
In the meantime, an intermediate screen including the second line of the first page and the first line of the second page as shown in FIG. 11B is displayed, and scrolling is performed in units of lines.

FIG. 12 is a flowchart showing an operation procedure of the FM multiplex broadcast receiver 1 of the present embodiment, and shows an operation procedure necessary for displaying an intermediate screen as shown in FIG. 11 (B). ing. At the time of FM multiplex broadcast reception, the data of each block shown in FIG. 3 is output from the LMSK demodulation circuit 20, and the block identification code B of the first 16 bits of each block is output.
Frame synchronization and block synchronization are achieved by the synchronization circuit 22 based on the IC. Then, the error detection and correction circuit 24
As a result, error detection based on the CRC added to the data packet and, when an error is detected, error correction based on the parity are performed. Thus, the error-corrected data packet corresponding to the layer 3 is output from the error detection and correction circuit 24 and input to the CPU 30.

The CPU 30 collects data blocks having the same data group number based on a service identification SI, an update flag, and the like included in the prefix of the sequentially input data packet, and collects data blocks corresponding to the hierarchy 4 (program management data). Or page data), and also collects those having the same program number included in the data header of each data group to create program data corresponding to layer 5. The service identification 2 corresponds to the recording / reception mode. After all data of the program data (or page data) as a transmission unit is stored in the data storage RAM 32, various kinds of information such as news and weather forecast from the display unit 36 are displayed. The presentation process, which is the target operation, is started.

After the operation of storing data in the data storage RAM 32 is completed, the CPU 30 proceeds to FIG.
Page data corresponding to the first page of the program shown in (A), in particular, data units (text data unit, header text data unit, etc.) data necessary for display contained therein are read from the data storage RAM 32, By using a character generator (CG), display data for each pixel is created and written to the display RAM 34,
The first page screen shown in FIG. 11A is displayed on the display unit 36 (step 200).

In parallel with such a display operation, C
The PU 30 reads out the page number included in the data header (see FIG. 7) of the page data of the first page being displayed, and adds “1” to the page number, thereby “page feed”.
When the key is pressed, the screen is switched to obtain the page number of the page to be displayed next (step 201). As described above, a continuous page number is associated with each page for which the display screen is switched by the “page forward” key, and “1” is assigned to the page number corresponding to the currently displayed screen. By adding, the page number of the screen to be displayed next is obtained. It should be noted that, besides the case where “1” is added to the page number of the currently displayed page to obtain the page number of the next page, the page number of the next page can be obtained based on the selection control data as described above.

Next, the CPU 30 extracts data to be displayed on the screen of the second page from the page data specified by the acquired page number and writes the data into the display RAM 34 (step 202). As described above, the display RAM
34 has a storage area for two pages of the display screen,
As shown in FIG. 11A, in a state where the display data of the currently displayed first page is written in one area, the display data of the second page is stored in the other area without being overwritten. You.

Next, the CPU 30 determines whether any of the operation keys of the operation unit 40 has been pressed by the user (step 203), and if so, determines whether or not the operation key is a “page feed” key. (Step 204) is determined.
If any key is pressed but not the “page feed” key, processing corresponding to the pressed key is performed (step 205). When the “page feed” key is pressed, the CPU 30 shifts the read address of the display data read from the display RAM 34 by one display line as shown in FIG.
6 is displayed as an intermediate screen (step 206).

Thereafter, the CPU 30 determines whether or not the "page feed" key of the operation unit 40 has been pressed by the user (step 207). Data units (text data unit, header sentence data unit, etc.) necessary for display are read out from the data storage RAM 32, display data for each pixel is created by using a character generator, and written into the display RAM 34. The screen of the second page shown in FIG.
(Step 208). After the screen display of the second page, the process returns to step 201 and the process is repeated. Therefore, when switching to the screen corresponding to the third page and the fourth page, the display of the intermediate screen is performed before each.

As described above, the FM multiplex broadcast receiver 1 of the present embodiment receives a program composed of a plurality of pages, and switches the display from the first page to the second page. And an intermediate screen consisting of the first line of the second page, and the sentence is interrupted at the end of the first page.
Even in the case where the page is continued, by looking at the intermediate screen, the text before and after the discontinued portion can be read as a continuous sentence in one screen, so that the display contents can be easily understood.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, an area for two pages of the display screen is secured in the display RAM 34, and when the screen display of the first page is performed, the display data of the second page is also stored. When the "page forward" key is pressed, the intermediate screen is displayed by changing the read address of the display data from the display RAM 34. However, other methods of displaying the intermediate screen are described. Can also be used.

FIG. 13 is a flowchart showing an operation procedure of a modified example in which the way of displaying the intermediate screen is changed. FIG. 13 shows an operation procedure when the CPU 30 edits the display data of the intermediate screen and writes it in the display RAM 34. ing. Compared with the operation procedure shown in FIG. 12, step 202 (writing of the display data of the second page to the display RAM 34) is deleted, and step 206 (display of the intermediate screen by changing the read address) is omitted. Step 300 of editing the intermediate screen by the CPU 30 and step 301 of writing the edited intermediate screen display data into the display RAM 34 and displaying the intermediate screen on the display unit 36
Has been replaced.

That is, the display RAM 34 has an area for one page, and when the “page forward” key is pressed while displaying the screen of the first page, the CPU 30
The data unit data necessary for the screen display of the page and the second page is read from the data storage RAM 32, and the data of the second line of the first page and the first line of the second page are extracted from the data and edited. (Step 300), and based on the edited data, display data is created for each pixel using a character generator and written into the display RAM 34, and the intermediate screen is displayed on the display unit 36.
(Step 301). In this way, the display data necessary for displaying the intermediate screen can be created by editing the data of each page before and after the switching.

FIG. 1 shows an example of displaying an intermediate screen.
Although the teletext program corresponding to level 1 as shown in FIG. 5 has been considered, the present invention can be applied to a teletext program corresponding to level 2 having a large number of display lines. For example, when an 8-line teletext program of level 2 is considered, as shown in FIG. 14, two pages of display data are stored in the display RAM 34, and the "page forward" key is pressed once. Each time the read-out address of the display RAM 34 is shifted by one line, each of the intermediate screens 1 to 7 is displayed in order, and display control is performed so as to scroll by one line. In addition, it is not necessary to display an intermediate screen in which the display is shifted by one line. For example, display control is performed such that the intermediate screens 1, 3, 5, and 7 shown in FIG. You may do so.

The above-described FM multiplex broadcast receiver 1
Although the configuration from the FM broadcast receiving unit to the display unit 36 was integrated, each component need not necessarily be integrated. For example, a separate FM receiving receiver may be installed in a vehicle-mounted navigation system. When connected, the display may use the display of the navigation system.

[0047]

As described above, according to the present invention, when the character information of a plurality of pages having continuous contents is switched and displayed for each page, the first page is displayed and then the first page is displayed. Since an intermediate screen including a part of each of the page and the next page is displayed, and then the next page is displayed, the display content is scrolled. Therefore,
Even when the display screen is switched, the sentences do not become discontinuous, and the contents can be easily understood.

More specifically, a page screen including character information corresponding to each of a plurality of pages having continuous contents and an intermediate screen partially including each of character information of two pages having continuous contents are created and displayed. The display means is capable of extracting a plurality of continuous pages based on a page number and selection control data in each page data including character information, and displays the intermediate screen described above. Can be created.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an FM multiplex broadcast receiver according to an embodiment to which the present invention is applied.

FIG. 2 is a diagram illustrating a transmission path signal of a layer 1;

FIG. 3 is a diagram showing a frame structure corresponding to layer 2;

FIG. 4 is a diagram showing the structure of a data packet of layer 3;

FIG. 5 is a diagram showing the structure of a data group of layer 4;

FIG. 6 is a diagram showing a structure of program data of a hierarchy 5;

FIG. 7 is a diagram illustrating an example of data header data included in a data header of page data.

FIG. 8 is a diagram showing the contents of each data unit constituting the data unit.

FIG. 9 is a diagram showing a specific example of a data unit parameter included in each data unit.

FIG. 10 is a diagram showing details of data unit data included in the selection control unit.

FIG. 11 is a diagram showing a display screen corresponding to display data stored in a display RAM.

FIG. 12 is a flowchart showing an operation procedure of the FM multiplex broadcast receiver of the embodiment.

FIG. 13 is a flowchart showing another operation procedure of the FM multiplex broadcast receiver of the present embodiment.

FIG. 14 is a display RAM when the number of display lines on the screen increases.
FIG. 7 is a diagram showing the correspondence between the stored contents of the information and the display screen.

FIG. 15 is a diagram showing a display example of a conventional FM multiplex broadcast receiver.

[Explanation of symbols]

Reference Signs List 1 FM multiplex broadcast receiver 12 Front end (F / E) 14 Intermediate frequency amplification / FM detection circuit (IF / DET) 16 Noise canceller / stereo demodulation circuit (NC / M
PX) 18 filter circuit 20 LMSK demodulation circuit 24 error detection and correction circuit 30 CPU 32 data storage RAM 34 display RAM 36 display unit 40 operation unit

Claims (5)

[Claims] 1. An FM multiplex broadcast receiver for receiving a FM multiplex broadcast including text information of a plurality of pages having continuous contents and displaying a screen of each page, when switching a screen display corresponding to each of the plurality of pages. Displaying an intermediate screen consisting of a part of the screen before switching and a part of the screen after switching
Multiplex receiver. 2. An FM multiplex broadcast receiving means for receiving and demodulating an FM multiplex broadcast to extract character information for a plurality of pages having continuous contents, and a character corresponding to each of the plurality of pages having continuous contents. Display means for creating and displaying each page screen including information and an intermediate screen partially including each of two pages of character information having continuous contents; display by the display means in response to a predetermined operation And display switching means for switching in the order of the page screen, the intermediate screen, and the page screen. 3. The page data of each page containing the character information according to claim 2,
The display unit includes a page number necessary for specifying a next page having continuous content, and the display unit includes, based on the page number, character information included in the page data of two pages having continuous content. Wherein the intermediate screen is created by partially extracting the intermediate screen. 4. The page data according to claim 2, wherein the page data of each page including the character information includes:
Selection control data necessary for specifying the next page having continuous content is included, and the display means is included in the page data for two pages having continuous content based on the selection control data. An FM multiplex broadcast receiver, wherein the intermediate screen is created by partially extracting character information. 5. The FM multiplex broadcast receiver according to claim 1, wherein display contents are scrolled by switching a display screen including the intermediate screen.