JPH0927787A - Fm multiplex broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive the audio broadcasting of another FM station while receiving FM multiplex broadcasting by providing two tuners, using one tuner only for receiving the FM multiplex broadcasting, and using the other tuner for receiving ordinary FM broadcasting. SOLUTION: A control part 7 sends the tuning data of a broadcasting station B to a first tuner 2 and simultaneously sends the tuning data of a broadcasting station A to a second tuner 3. A demodulated audio signal is supplied from the tuner 2 to a voice amplifier 9 and the voice of the broadcasting station B can be enjoyed from a speaker 10. On the other hand, the demodulated signal of the broadcasting station A is supplied from the tuner 3 to an FM multiplex decoder 4. At the decoder 4, the program of traffic information is selected depending on a control signal from the control part 7. The character information of the traffic information sent to the decoder 4 is displayed through a display control part 5 onto a display device 6. Thus, the FM character program of the other broadcasting station can be received while listening to the FM audio broadcasting of a certain frequency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM multiplex broadcasting receiver for receiving FM multiplex broadcasting as new media.

[0002]

2. Description of the Related Art In recent years, FM text multiplex broadcasting, which provides additional information on FM music broadcasting as a new medium, has been receiving attention.

At present (as of February 1995), there is only one main broadcasting in the metropolitan area and one broadcasting in the Osaka area, but from April, the main broadcasting will be carried out at 33 JFN net stations nationwide.

As the service content, not only complementary programs such as FM radio program information but also information useful for daily life such as weather, traffic information, and news can be immediately obtained. Furthermore, DGPS, a pager service, etc., which broadcasts and corrects error information of a GPS navigation system, which has been remarkably popular in recent years, has been studied, and it is one of the media expected to grow in the future.

Conventionally, an FM teletext receiver has a structure as shown in FIG. In the figure, the FM character multiplex receiver includes a tuner 2 for receiving a predetermined FM broadcast via an antenna 1, and a character decoder 4 for obtaining data of the character broadcast superimposed on the FM broadcast received by the tuner 2.
And display data corresponding to the character data are displayed on a display device 6 described later, for example, a liquid crystal display device, and the display control unit 5 and the tuner 2 and the teletext decoder 4 are controlled to display data. Control unit 7 for transferring
And a memory 8 for storing the control program of the control unit and an audio amplifier 9 for amplifying the sound of the signal received by the tuner 2 and supplying the amplified sound to the speaker 10.

[0006]

However, in order to extract information from the multiplex signal superimposed on the FM broadcast signal, the broadcast wave of the station broadcasting the FM multiplex broadcast must be received. For example, let's consider a case where one wants to enjoy a normal FM music broadcast at the same time while watching the congestion information of the FM text multiplex broadcast. It is assumed that the broadcaster A sends the congestion information in the character multiplex broadcast and the broadcaster B broadcasts the music program to listen to.

In the case of the FM multiplex receiver having the configuration shown in FIG. 2, since reception is performed by only one tuner, the character multiplex broadcasting is being performed when looking at the congestion information of the FM text multiplex broadcasting.
Since the broadcasting station must be received, the audio of the broadcasting station B cannot be heard. Also, it is very inconvenient because the congestion information of the character multiplex broadcast of the A broadcast station cannot be seen if the voice of the B broadcast station is heard.

The same applies to DGPS error information broadcasting and pager services.

The present invention has been made in view of the above problems, and an object thereof is to enable users to enjoy a desired FM audio broadcast at the same time while viewing the information of the FM multiplex broadcast.
An object is to provide an M multiplex broadcast receiver.

[0010]

In order to achieve the above object, the present invention separates a multiplex broadcast superimposed on an FM broadcast and displays the separated multiplex broadcast signal on a display device such as a liquid crystal display. In the FM multiplex broadcast receiver, the first and second tuners for receiving the FM broadcast are provided, and the tuner of 1 is exclusively used for receiving and separating the signal of the FM multiplex broadcast, and the tuner of the above 2 is used. The main purpose is to have two tuners so that they can be used exclusively for outputting the signals received by the tuners.

[0011]

With the above structure, the first tuner and the second tuner
The tuner receives different broadcast waves from FM stations.

Therefore, if the first tuner is used for multiplex broadcasting and the second tuner is used for receiving normal FM audio broadcasting, for example, the first tuner receives the character multiplex broadcasting of the A broadcasting station and the second tuner. The tuner can receive FM broadcasts from broadcast stations other than the A broadcast station.

Therefore, while the character multiplex information screen displays the A broadcasting station, the voice can listen to the broadcasting other than the A broadcasting station.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An FM multiplex receiver according to an embodiment of the present invention will be described below with reference to the drawings. The second in the figure
The same parts as those in the figure and the corresponding parts are designated by the same reference numerals, and the duplicated description will be omitted.

(Embodiment 1) FIG. 1 shows an FM multiplex receiver according to an embodiment of the present invention. In this figure, the FM broadcast receiver is connected to the first tuner 2 and the second tuner 2 via the antenna 1.
An RF signal is supplied to both the tuner 3 and the tuner 3. The FM broadcast wave demodulated by the second tuner extracts the multiplex broadcast signal by the FM multiplex decoder 4, and is displayed on the display device 6 via the display control unit 5 as character information.

On the other hand, the FM broadcast wave demodulated by the first tuner is amplified by the audio amplifier 9 and output from the speaker 10. The control unit 7 controls the first and second tuners independently of each other to enable reception of different broadcast waves.
It also controls the multiplex decoder 4.

The operation of the FM multiplex broadcast receiver having the above configuration will be described. First, it is assumed that the traffic information of the broadcasting station A is selected as the FM text broadcasting and the broadcasting station B is selected as the FM audio broadcasting. The control unit 7 sends the tuning data of the B broadcasting station to the first tuner 2 and at the same time sends the tuning data of the A broadcasting station to the second tuner 3. The demodulated audio signal is supplied from the first tuner 2 to the audio amplifier 9, and the speaker 1
From 0, you can enjoy the sound of broadcasting station B.

On the other hand, the demodulated signal of the broadcast station A is supplied from the second tuner 3 to the FM multiplex decoder 4. FM
The multiplex decoder 4 selects a traffic information program by a control signal from the control unit 7. The character information of the traffic information sent to the FM multiplex decoder 4 is displayed on the display device 6 via the display control 5. In this way, while listening to FM audio broadcasting of a certain frequency, it is possible to receive FM character programs of another broadcasting station. For example, if this device is used for car audio, another broadcasting station can be seen while watching character congestion information while driving. Since the music program can be enjoyed and the application of the FM text program can be expanded, the usage of the FM text multiplexed broadcast can be expanded.

(Embodiment 2) Similarly to Embodiment 1, in FIG. 1, the DGPS error signal output of the FM multiplex decoder 4 is FM.
Output to the outside of the receiver and supply to the external GPS receiver. The GPS receiver side corrects its own position information based on the DGPS error information signal of this FM multiplex broadcast signal. FM multiplex broadcast DGP as in the first embodiment
At the same time as obtaining the S error information, the audio program of another broadcasting station can be enjoyed.

(Embodiment 3) Similar to Embodiments 1 and 2, FIG.
In the case of using an FM multiplex receiver as a receiver of a pager service which is being considered as a new service of FM multiplex broadcasting in, the second tuner 3 is used for the pager service while the first tuner 2 is used for FM audio broadcasting. By using it for receiving, you can freely enjoy the voice broadcasting of your favorite broadcasting station while using the pager service.

[0021]

As described above, according to the present invention, the FM multiplex receiver is provided with two tuners, one tuner is dedicated for FM multiplex broadcast reception, and the other is for normal FM broadcast reception. Since it is possible to receive another FM audio broadcast while receiving the FM multiplex broadcast, it is possible to expand the use of the FM multiplex broadcast, which is very useful.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an FM multiplex receiver according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a conventional FM multiplex receiver.

[Explanation of symbols]

 1 Antenna 2 1st Tuner 3 2nd Tuner 4 FM Multiplexing Decoder 5 Display Control 6 Display Device 7 Controller 8 Memory

Claims (4)

[Claims] 1. A tuner for receiving a first FM audio broadcast, and an FM multiplex broadcast signal superimposed on an FM broadcast wave,
A second FM broadcast receiving tuner for demodulation, a means for controlling the first and second FM audio broadcast receiving tuners, and an FM multiplex broadcast from a signal received by the second FM broadcast receiving tuner. An FM multiplex broadcast receiver comprising an FM multiplex decoder for separating and demodulating a signal, and a display means for displaying the demodulated FM multiplex broadcast signal. 2. A first FM audio broadcast reception tuner and an FM character multiplex signal superimposed on an FM broadcast wave,
A second FM broadcast reception tuner for demodulation, means for controlling the first and second FM audio broadcast reception tuners, and FM character multiplexing from a signal received by the second FM broadcast reception tuner. An FM multiplex broadcast receiver comprising an FM character multiplex decoder for separating and demodulating a signal, and a display means for displaying the demodulated FM character multiplex signal. 3. A first FM audio broadcast receiving tuner and a DGP of an FM multiplex broadcast signal superimposed on an FM broadcast wave.
A second FM broadcast receiving tuner for receiving and demodulating an S (Differential Global Positioning System) error signal, means for controlling the first and second FM audio broadcast receiving tuners, and the second FM An FM multiplex decoder for separating and demodulating the DGPS error information as an FM multiplex broadcast signal from a signal received by a broadcast reception tuner, and a GPS (Global Positioning System) receiving the demodulated FM multiplex broadcast signal as DGPS error information FM multiplex receiver with an output terminal that can be supplied to the machine. 4. A first FM audio broadcast receiving tuner, a second FM broadcast receiving tuner for receiving and demodulating a pager signal superimposed on an FM broadcast wave as an FM multiplex broadcast signal, and the first FM broadcast receiving tuner. Means for controlling a tuner for receiving the second FM audio broadcast, an FM multiplex decoder for separating and demodulating the FM multiplex broadcast signal from the signal received by the tuner for receiving the second FM broadcast, and the demodulated An FM multiplex broadcast receiver including a display unit for displaying an FM multiplex broadcast signal as pager information.