JPH0936767A - Fm multiplex broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed pages quickly as required by providing a means invalidating display control of image display data based on display control data in response to the operation of a fast feed operation means. SOLUTION: A CPU 6 connects to a next page key 9 and a display device 10. A computer program to control an image display operation is registered in a ROM 7. Furthermore, character codes of a received program for plural pages are stored in a RAM 8. Every time the next page 9 is depressed once, a display image is fed by one page. On the other hand, fast page feeding is selected by depressing continuously the next page key 9 and even when a time instruction is interposed between character codes, the instruction is neglected and all characters included on the page are quickly displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an electric wave of the current FM broadcasting to multiplex screen display data for displaying characters and images with an audio signal of a main program and transmits the F.
The present invention relates to a receiver for M multiplex broadcasting.

[0002]

2. Description of the Related Art In recent years, as shown in FIG. 2, a sum signal (L
+ R) and a difference signal (LR), an FM stereo audio signal is multiplexed with screen display data such as a character code in a band deviated from the base band of the audio signal, and then FM is added to the multiplexed signal. FM multiplex broadcasting, which is modulated and transmitted, has been put into practical use.

A receiver for FM multiplex broadcasting is usually provided with a small display capable of displaying characters in the order of several crosses, on which scroll display for each line or batch display for a plurality of lines is performed. By receiving the FM multiplex broadcast as described above, various information services such as the broadcast station name and program name of the FM broadcast, news, weather forecast, and traffic information can be received.

FIG. 3 shows an example of a program configuration of FM multiplex broadcasting, in which a program number is assigned to each of a plurality of programs. For example, a program with a program number of 000 has a head consisting of two pages. When the "weather forecast" program is selected from the menu screen, the weather forecast for each prefecture of Kinki is displayed for six pages under the program number 030. If you select the "Traffic Information" program, the program number 0
Under 40, traffic information for each major road is displayed over four pages. These plural pages are page-fed by operating the next page key provided on the operation panel.

By the way, the data to be added to the FM multiplex broadcast can include display control data for controlling the screen display in addition to screen display data such as a character code. For example, by interposing a time command in the middle of the character code, it is possible to suspend the character display within one page for a predetermined time in the middle of the character, which is effective for timing control when switching the lyrics display of karaoke. Is.

[0006]

However, in the conventional FM multiplex broadcasting receiver capable of responding to the time command, when the additional data includes the time command, it always responds to the time command, Since the structure for interrupting the character display is adopted, for example, by pressing the next page key continuously, when repeating a plurality of pages forming one program to select a desired page, When a time command is included in an unnecessary page, the character display is interrupted at that time, and there is a problem that it takes time to page forward until a desired page is reached.

An object of the present invention is to provide an FM multiplex broadcast receiver that can quickly page forward as needed.

[0008]

An FM multiplex broadcasting receiver according to the present invention includes a receiving means for receiving FM multiplex broadcasting, a demodulation for performing FM demodulation on a received signal, and extracting additional data from the demodulated signal. Means, display means for displaying screen display data included in the extracted additional data page by page under the control of the display control data, and should be operated when the display of the display means is sent to the next page. The page feed operation means, the fast-forward operation means to be operated when fast-forwarding the display page, and the invalidation means for invalidating the display control of the screen display data by the display control data according to the operation of the fast-forward operation means. I am.

The main audio signal and additional data are extracted by subjecting the received FM multiplex broadcast signal to FM demodulation. If necessary, the main audio signal is sounded from the speaker through an audio signal reproduction process. On the other hand, the additional data is sent to the display means, and the screen display data included in the additional data is displayed. At this time, when the additional data includes the display control data, the screen display data is displayed under the control of the display control data. For example, when the screen display data is a character code and the display control data is a time command, the character code is decoded, a character is displayed, and if a time command is present in the middle, a predetermined time is determined at that time. The character display is interrupted for the time.

When the page feed operation is performed after the display of the screen display data for one page is completed, the display of the next page is displayed, and the screen display data is similarly displayed under the control of the display control data. Be done. On the other hand, when the fast-forward operation is performed, the display control data included in the additional data is invalidated, and the screen display data is displayed without the control by the display control data. For example, when the screen display data is a character code and the display control data is a time command, the time command is ignored and the characters are displayed one after another. Therefore, page turning is performed quickly, and the desired page can be reached in the shortest possible time.

In a specific configuration, the page feed operating means and the fast forward operating means are constituted by a common next page key, and by continuously pressing the next page key for a certain time or more, the page is operated. The feed is switched to fast forward.

[0012]

According to the FM multiplex broadcast receiver of the present invention, the page feed can be performed quickly by operating the fast-forward operation means as required.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows the configuration of an FM multiplex broadcast receiver of the present invention. antenna
The FM multiplex broadcast wave received in (1) is subjected to FM detection and stereo demodulation by the FM tuner (2) selecting a specific broadcast station. FM tuner
Stereo demodulation output of baseband (0 to 53 kHz) obtained from (2), that is, sum signal (L + R) and difference signal
The FM stereo audio signal composed of (LR) is supplied to the audio signal reproducing circuit (3), is converted into a right channel signal and a left channel signal, and is further subjected to processing such as low frequency amplification, and then a pair of left and right speakers. Sound is emitted from (4).

A frequency band (53 to 100 kHz) higher than the base band band obtained from the FM tuner (2)
The FM detection output of is supplied to the data demodulation circuit (5), and L
-MSK demodulation is performed, whereby additional data is obtained.

In the present embodiment, the additional data includes a character code and a time command, and a plurality of programs are constituted by the character information as shown in FIG.
It is sent as M multiplex broadcast. Each program is composed of multiple pages, and a program number is assigned to each page.

The additional data obtained from the data demodulation circuit (5) of FIG. 1 is supplied to a microcomputer including a CPU (6), a ROM (7) and a RAM (8). CPU (6)
The next page key (9) and the display (10) are connected to, and the display (10) is operated by operating the next page key (9).
The display screen of is switched. A computer program for controlling the screen display operation is registered in the ROM (7) as described later. In addition, the character code of the received program is stored in the RAM (8) over a plurality of pages, and thereafter, the stored character code is read out as necessary,
It is used for display by the display (10).

Here, every time the next page key (9) is pressed once, the display screen is sent by one page. In the program example of FIG.
In the "weather forecast" of program number 030, for example, if the next page key (9) is operated once while the weather forecast of Osaka Prefecture is displayed, the weather forecast of Hyogo prefecture on the next page is displayed on the display (10). . Further, if the next page key (9) is operated four times, the weather forecasts from Kyoto to Wakayama are sequentially displayed.
By operating the next page key (9) again, the display returns to the weather forecast display page of Osaka Prefecture.

In this way, when a plurality of pages are sequentially displayed on the display (10) and a time command is present between the character codes forming any page, the time command is Accordingly, the character display is interrupted. Then, after a lapse of a predetermined time, the character display of the page is restarted.

On the other hand, by continuously pressing the next page key (9), the page feed is switched to fast-forward, and even if there is a time command between character codes, this is ignored. Quickly display all the characters on the page.

4 and 5 show the procedure of the screen display control of the CPU according to the operation of the next page key. FM
When the power of the multiplex broadcasting receiver is turned on, first, in step S1 of FIG. 4, a timer time1 for measuring the interruption time of the character display by the time command and a setting for ignoring the time command. After initializing the flag flag to 0, in step S2, it is determined whether or not the drawing of the characters for one page is completed. Immediately after the power is turned on, it is determined to be YES, the process proceeds to step S3, and it is determined whether the next page key is pressed. The flag fl
When ag is 1, the time command is ignored, and when 0, the time command is not ignored.

If the next page key is not operated and it is judged NO in step S3, the process returns to step S2. afterwards,
When the next page key is pressed and YES is determined in step S3, the process proceeds to step S4, the page counter page is incremented, and the next page key pressing time is measured in step S5. Timer ti for
Initialize me2 to 0.

Two timers, time1 and tim.
For e2, the interrupt processing shown in FIG. 5 is executed every 0.1 seconds. When it is determined in step S11 that the timer time1 has a positive value, the timer time1 is counted down in step S12. If the next page key is pressed in step S13, it is determined in step S14 whether or not the timer time2 exceeds the predetermined value S of the continuous pressing time. If NO, in step S15 the timer time2 is determined. To count up.

Next, in step S6 of FIG. 4, it is determined whether the flag flag is 1, that is, whether the page fast-forward mode is set.
In step S7, it is determined whether the timer time1 is a positive value.

When NO is determined in step S7,
That is, when the interruption time of the character display is set to 0, the processing shifts to the code analysis in step S8. As a result, either the character code or the time command is analyzed. Then, in step S9, it is determined whether or not the analysis result is a time command. If NO, step S9.
At 10, one character is drawn according to the analyzed character code. If YES, in step S11, the timer time1 is set to a predetermined integer value N, and then the process returns to step S2.

Therefore, when the time command is analyzed by the code analysis in step S8, N is determined in step S11.
After that, it is determined that the timer time1 set to the value of 0 has exceeded 0 in step S7, and the character drawing process from the next step S8 to step S10 is stopped. Then, when the timer time1 is counted down to 0, the determination in step S7 becomes NO, and the character drawing process from step S8 to step S10 is restarted.

After the drawing of a plurality of characters forming one page is started and until the drawing of all the characters is completed, NO is determined in step S2, and the process proceeds to step S12.
It is determined whether the next page key is pressed. When the next page key is pressed, it is determined in step S13 whether the timer time2 exceeds the predetermined value S of continuous pressing time, and if it is exceeded, the flag flag is set to 1 in step S14, Control goes to step S6. If NO is determined in step S13, the flag fl
The process proceeds to step S6 while maintaining ag at 0. or,
If it is determined in step S12 that the next page key is not pressed, the process proceeds to step S15 and the flag flag is set.
Is set to 0.

Therefore, when the next page key is continuously pressed while drawing a plurality of characters forming one page, the determination in step S13 becomes YES, and the flag flag is set to 1 in the next step S14. As a result, the determination of step S7 is bypassed by the subsequent step S6, and the process proceeds to the code analysis of step S8. As a result, even when the timer time1 is set to an integer value of 1 to N by the time command, the steps S8 to S are always performed.
The character drawing process of 10 is executed, and all the characters forming the page are displayed promptly.

According to the FM multiplex broadcast receiver, the page forward is switched to the fast forward by continuously pressing the next page key (9), and therefore, from among a plurality of pages constituting one program. The desired page can be quickly selected and displayed.

The description of the above embodiment is for the purpose of describing the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof.
In addition, the configuration of each part of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims. For example, as the additional data, it is possible to handle video data and other multimedia information in addition to the character code.

In addition to the time command, the display control data may include control data for character modification and formatting of subscripts, superscripts, half-width characters and the like. Further, in addition to the next page key or in place of the next page key, a previous page key for returning the displayed page forward by one page is provided, and the previous page key is continuously pressed to advance the page forward. It is also possible to adopt a configuration for realizing the return.

Further, in the above-described embodiment, the page forward is switched to the fast forward by continuously pressing the next page key. However, a dedicated page fast forward key or page fast reverse key is provided. Can also be adopted.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an FM multiplex broadcast receiver according to the present invention.

FIG. 2 is a diagram showing a frequency spectrum of FM multiplex broadcasting.

FIG. 3 is a diagram illustrating a program configuration example of FM multiplex broadcasting.

FIG. 4 is a flowchart showing a control procedure of character display based on operation of a next page key.

FIG. 5 is a flowchart of timer interrupt processing.

[Explanation of symbols]

 (1) Antenna (2) FM tuner (5) Data demodulation circuit (6) CPU (7) ROM (8) RAM (9) Next page key (10) Display

Claims (3)

[Claims] 1. The main audio signal is multiplexed with additional data including screen display data and display control data in a band deviated from the base band of the main audio signal, and the multiplexed signal is FM-modulated and transmitted. In a receiver for FM multiplex broadcasting, receiving means for receiving FM multiplex broadcasting, demodulation means for subjecting the received signal to FM demodulation and extracting additional data from the demodulated signal, and extracted additional data Display means for displaying the screen display data contained in the page by page under the control of the display control data, a page feed operation means to be operated when the display of the display means is sent to the next page, and a display page Fast-forwarding operation means to be operated when fast-forwarding, and invalidating means for invalidating the display control of the screen display data by the display control data according to the operation of the fast-forwarding operation means. An FM multiplex broadcast receiver characterized by: 2. The FM multiplex broadcasting receiver according to claim 1, wherein the screen display data is a character code, and the display control data is a time command for interrupting the character display within one page for a predetermined time in the middle of the character. . 3. The page forward operating means and the fast forward operating means are constituted by a common next page key, and the page forward is switched to the fast forward by continuously pressing the next page key for a certain time or more. The FM multiplex broadcast receiver according to claim 1 or 2.