JPH08162985A - Fm multiplex receiver - Google Patents

Abstract

PURPOSE: To perform a display without requiring a troublesome operation by providing an information storage means, a control means reading the information which is pertinent to a preliminarily set condition from the information storage means and a means displaying the information read out from the storage means. CONSTITUTION: The digital signal demodulated in an LMSK(Level-controlled Minimum Shift Keying) demodulation circuit 24 is synchronized and reproduced in synchronizing reproduction circuit and error correction circuit 26 in accordance with a BIC(block identification code), an error correction is performed for the digital signal in accordance with a parity code and the signal is imparted to a microcomputer 16. After the digital signal imparted from the microcomputer 16 is temporarily written in a RAM 28, the digital signal is processed by the key input signal from an operation key 30 and the program stored in a ROM 32 and character information is displayed on a display device 34. At the same time, preliminarily designated information or information on weather information, for instance, is always fetched by the microcomputer 16 and is stored in the RAM 28. This weather information is updated only when new different information is received. Thus, the weather information is always displayed by a display means without requiring a troublesome operation.

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 an FM multiplex signal in which a digital signal is multiplexed with an FM broadcast signal.

[0002]

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

Various uses are considered as information in text, and one of them is a weather information program. As a method of displaying this 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 actual contents of the weather information are displayed on the display.

[0004]

However, the weather information that one wants to know in daily life should be information about the area in which he / she lives, and the amount of information is extremely small. Therefore, it is not desirable that the user is forced to perform a troublesome operation and the display is occupied only by the display.

[0005]

In view of the above-mentioned problems, the present invention provides an FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed with an FM broadcast signal. Control means for reading the information corresponding to preset conditions from the information storage means, and displaying means for displaying the information read from the storage means. And

According to the present invention, in an FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed with an FM broadcast signal, information corresponding to a preset condition among information storage means and preset information. And a display unit for displaying the information read from the storage unit.

[0007]

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

Further, the information of the condition designated in advance and set in advance is displayed at a place different from the display of the contents of the program of other FM multiplex broadcasting.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the frame structure of a digital signal multiplexed with an FM broadcast signal. One frame consists of 272 blocks, and each block starts with a 16-bit BIC.
(Block Identification Code) is added and used for playback 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 column-direction parity. In the data transmission packet,
Following the BIC, a 176-bit data packet, a 14-bit CRC (Cyclic Retundancy Code), and an 82-bit parity section are provided.

F in which such digital signals are multiplexed
The M-multiplexed signal is received by the antenna 12 of the FM multiplex receiver 10 shown in FIG. 2 and given to the front end 14. In the front end 14, the FM multiplex signal is converted into an IF signal by the local oscillation frequency signal from the block 18 including the PLL circuit and the local oscillation circuit controlled by the control means such as the microcomputer 16. The converted IF signal is then detected by the IF amplification and detection circuit 20, and the detected signal is the multiplexer 22 and LMSK.
(Level-controlled Minimum Shift Keying) It is applied to the demodulation circuit 24 and the microcomputer 16.

The multiplexer 22 generates a voice signal based on the detected signal, and the LMSK demodulation circuit 24 demodulates the digital signal having the frame structure shown in FIG.
The demodulated digital signal is synchronized with the BI signal by the synchronous reproduction and error correction circuit 26 according to the control signal from the microcomputer 16.
The signal is reproduced synchronously in accordance with C, the error is corrected in accordance with the parity code, and the digital signal subjected to these processes is given to the microcomputer 16. The digital signal given to the microcomputer 16 is once written in the RAM 28, and then the key input signal from the operation key 30 and the ROM 32 are input.
The character information is displayed on the display 34 by the processing according to a predetermined program stored in.

At the same time, the information designated in advance, for example, the information about weather information is always taken in by the microcomputer 16 and stored in the RAM 28. The weather forecast information should be updated only when new information is received.

Then, information corresponding to a preset condition, for example, a region name such as a prefecture name is read from the RAM 28 by the microcomputer 16 and displayed on the display 36 dedicated to the weather information at all times.

In the above example, all the information about weather information is fetched and stored in the RAM 28.
Of the weather information, only the information corresponding to the preset conditions 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 the indicator 36 dedicated to weather information.

FIG. 3A is the simplest example, and three light emitting diodes provided corresponding to each drawing on the inner surface side of the display plate 38 in which the drawings of sunny, cloudy, and rain are drawn. 40a, 4
This is an example in which 0b and 40c are selectively turned on and displayed.

FIG. 3B shows an example using a small liquid crystal (LCD), for example, an area name is displayed in Chinese characters and weather information is displayed graphically, and more various expressions are possible.

Although not shown, the weather information may be constantly displayed on the vacant portion of the multiple information display 34. Furthermore, a display such as a television may be used together and the weather information may be displayed in a superimposed manner in the corner of the screen.

[0019]

As described above, according to the present invention, it is possible to constantly send the information of the condition specified in advance and set in advance, such as the weather information of a certain area, which is sent by the FM multiplex broadcasting, without requiring a troublesome operation. It can be displayed by the display means.

Further, since the information on the conditions designated in advance and set in advance is displayed in a place different from the display of the contents of the programs of other FM multiplex broadcasts, the receiver can be effectively used. .

[Brief description of drawings]

FIG. 1 is an illustrative view showing a frame structure of a digital signal multiplexed with an FM broadcast signal.

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

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

[Explanation of symbols]

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

Claims (4)

[Claims] 1. In an FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed with an FM broadcast signal, information storing means, and information designated in advance is stored in the storage means, and the information storing means is provided. An FM multiplex receiver comprising: a control unit that reads information corresponding to a preset condition from the display unit; and a display unit that displays the information read from the storage unit. 2. An FM multiplex receiver for receiving an FM multiplex signal in which a digital signal is multiplexed with an FM broadcast signal, the information storage means, and the information corresponding to a preset condition among the preset information is fetched. An FM multiplex receiver comprising: control means for storing in the storage means; and display means for displaying information read from the storage means. 3. The FM multiplex receiver according to claim 1, wherein the predesignated information is weather information and the preset condition is a region-related condition. 4. The information read out from the storage means and displayed on the display means is always displayed in a place different from other information, according to any one of claims 1 to 3. The described FM multiplex receiver.