JP2902965B2 - FM multiplex receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM multiplex receiver, and more particularly to an FM multiplex receiver for receiving, for example, an FM multiplex signal in which a digital signal is multiplexed on an FM broadcast signal.

[0002]

2. Description of the Related Art In FM broadcasting, in FM multiplex broadcasting which broadcasts an FM multiplex signal in which data is superimposed on an audio signal, various character information and graphics can be displayed in addition to the conventional stereo audio signal.

[0003] Various uses are considered as text information, and one of them is a weather information program. As a method of displaying the weather forecast, for example, a menu of various programs is displayed in the initial display, and weather information is selected from the menu, whereby the contents of the actual weather information are displayed on the display.

[0004]

However, the weather information that one wants to know in daily life only needs to be information on the area where one lives, and the amount of information is extremely small. Therefore, it is not desirable that the user be forced to perform a troublesome operation or occupy the display only for the display.

[0005]

SUMMARY OF THE INVENTION In view of the above, the present invention provides an FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed on an FM broadcast signal. Control means for reading the information corresponding to a preset condition from the information storage means, which is taken in and stored in the storage means, and display means for displaying the information read from the storage means. And

According to another aspect of the present invention, there is provided an FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed on an FM broadcast signal, comprising: an information storage unit; And a display means for displaying the information read from the storage means.

[0007]

According to the above arrangement, it is possible to always display the information of the condition specified in advance and the condition set in advance, for example, the weather information of a certain area, which is transmitted by the FM multiplex broadcasting, by the display means.

[0008] Also, information on conditions specified and set in advance is displayed in a different place from the display of the contents of other FM multiplex broadcast programs.

[0009]

FIG. 1 shows a frame structure of a digital signal multiplexed on an FM broadcast signal. One frame is composed of 272 blocks, and a 16-bit BIC is provided at the beginning of each block.
(Block Identification Code) is added, and is used for reproduction of frame synchronization and block synchronization. Of the 272 blocks, 190 blocks are packets for transmitting data, and 82 blocks are parity packets for transmitting parity in the column direction. In data transmission packets,
Following the BIC, a 176-bit data packet, a 14-bit CRC (Cyclic Retundancy Code), and an 82-bit parity part are provided.

[0010] Such a digital signal multiplexed F
The M multiplex signal is received by the antenna 12 of the FM multiplex receiver 10 shown in FIG. In the front end 14, an FM multiplex signal is converted into an IF signal by a local oscillation frequency signal from a block 18 including a PLL circuit and a local oscillation circuit controlled by a control unit, for example, a microcomputer 16. The converted IF signal is thereafter detected by an IF amplification and detection circuit 20, and the detected signal is converted to a multiplexer 22 and LMSK.
(Level-controlled Minimum Shift Keying) The signal is supplied to the demodulation circuit 24 and the microcomputer 16.

The multiplexer 22 generates an audio signal based on the detection signal, and the LMSK demodulation circuit 24 demodulates the digital signal having the frame configuration shown in FIG.
The demodulated digital signal is supplied to a synchronous reproduction and error correction circuit 26 according to a control signal from
The digital signal is synchronously reproduced in accordance with C and error-corrected in accordance with the parity code. The digital signal given to the microcomputer 16 is temporarily written into the RAM 28, and then the key input signal from the operation key 30 and the ROM 32
Are processed in accordance with a predetermined program stored in the display unit 34, whereby character information is displayed on the display 34.

At the same time, information specified in advance, for example, information relating to weather information, is always taken in by the microcomputer 16 and stored in the RAM 28. The information on the weather forecast is updated only when new different information is received.

The microcomputer 16 reads out information corresponding to a preset condition, for example, an area name such as a prefecture name from the RAM 28, and always displays the information on a display 36 dedicated to weather information.

In the above example, all information relating to the weather information is fetched and stored in the RAM 28.
Of the weather information, only information corresponding to a preset condition may be fetched and stored in the RAM 28. In this case, the occupation amount of the RAM 28 can be reduced.

FIG. 3 is a diagram showing an example of a display 36 dedicated to weather information.

FIG. 3A shows the simplest example, in which three light-emitting diodes provided on the inner side of the display panel 38 on which the figures of sunny, cloudy, and rain are drawn. 40a, 4
This is an example in which 0b and 40c are selectively lit and displayed.

FIG. 3B shows an example in which a small liquid crystal (LCD) is used, for example, an area name is displayed in kanji and weather information is displayed in a graphic form, and more various expressions are possible.

Although not shown, weather information may always be displayed in a vacant portion of the multiplexed information display 34. Further, a display such as a television may be used in combination, and weather information may be displayed in a superimposed manner in a corner of the screen.

[0019]

As described above, according to the present invention, information of conditions specified in advance and set in advance, for example, weather information of a certain area, which is transmitted by FM multiplex broadcasting, can be constantly obtained without any troublesome operation. It can be displayed on the display means.

Further, since the information of the condition specified and set in advance is displayed in a place different from the display of the content of the program of another FM multiplex broadcast, the receiver can be effectively used. .

[Brief description of the drawings]

FIG. 1 is an illustrative view showing a frame configuration of a digital signal multiplexed on an FM broadcast signal;

FIG. 2 is a block diagram illustrating an FM multiplex receiver according to an embodiment of the present invention.

FIGS. 3A and 3B are diagrams respectively showing examples of a display device for displaying weather information.

[Explanation of symbols]

 Reference Signs List 10 FM multiplex receiver 16 Microcomputer (control means) 28 RAM (information storage means) 36 Display (display means)

Claims (4)

(57) [Claims] 1. An FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed on an FM broadcast signal, information storage means for fetching and storing digital signal information from the FM multiplexed signal, and said information storage means A first display unit for displaying information corresponding to a predetermined condition from a first operation key, a first operation key for setting a condition of the information to be displayed, and a condition set by the first operation key from the information storage unit. And a second display means for displaying pertinent information. An FM multiplex receiver comprising: A second operation key for setting a condition of information to be taken into the information storage means, wherein information corresponding to a condition set by the second operation key is taken into the storage means; 2. The FM multiplex receiver according to claim 1, wherein information corresponding to the predetermined condition is displayed on the first display device from a storage unit. 3. When the received information corresponding to the predetermined condition is different from the information stored in the storage means, the information corresponding to the condition set by the second operation key is stored in the storage unit. 3. The FM multiplex receiver according to claim 2, wherein said FM multiplex receiver is incorporated in said means. 4. The FM multiplex receiver according to claim 2, wherein the condition set by the second operation key is a condition relating to an area, and the predetermined condition is weather information.