JP3231188B2 - FM multiplex broadcast 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 broadcast receiver, and more particularly, to switching between two or more FM multiplex broadcast receivers by using one FM multiplex broadcast receiver. The present invention relates to an FM multiplex broadcast receiver that alternately receives multiplex broadcast signals and sequentially displays program data in the FM multiplex data of the FM multiplex broadcast signals on a display unit.

[0002]

2. Description of the Related Art Generally, an FM multiplex broadcast signal used in Japan comprises a normal FM broadcast signal and FM multiplex data multiplexed in a high frequency region on a baseband of the FM broadcast signal. , These FM broadcast signals and F
The M multiplex data is carried on the same carrier signal and transmitted from the FM broadcast station as an FM multiplex broadcast signal. And F
The M multiplex data includes traffic information, character information (text information), and various additional information. In this case, the traffic information and the character information constitute program data by a plurality of data groups each including a data group header and data group data. And
In this program data, the first data group is program management data composed of a program data header and a data unit group, and the second and subsequent data groups are composed of page data composed of a page data header and a data unit group. Such program data is incorporated into the FM multiplex data in the FM multiplex broadcast signal, and is repeatedly broadcast from the FM broadcast station at a cycle of 2.5 to 5 minutes. The information content of each data unit group is It is changed as appropriate after a number of cycles.

In a known FM multiplex broadcast receiver, the process until such program data is temporarily stored in an internal memory of the FM multiplex broadcast receiver and the program data stored in the internal memory are displayed. The details of the operation up to the display in the section are as follows.

First, in an FM / AM tuner of an FM multiplex broadcast receiver, an FM / AM tuner that broadcasts program data is provided.
When an FM multiplex broadcast signal from the M broadcast station is received, the broadcast signal is high-frequency amplified at the front end and then converted to an intermediate frequency signal. Next, the intermediate frequency signal is FM-demodulated after being subjected to intermediate frequency amplification in an intermediate frequency circuit / demodulation circuit to form a demodulated signal. At this time, the multiplexed data demodulation circuit demodulates and extracts multiplexed data such as character information from the demodulated signal. Subsequently, the extracted multiplexed data is subjected to synchronization and error correction processing in a synchronous error correction unit, and then the control unit (CP
U) and stored in the internal memory as program data under the control of the control unit. In this case, the FM multiplex broadcast receiver repeatedly receives the FM multiplex data having the same information content at regular time intervals. The information content such as the program data stored in the internal memory is based on the FM content being broadcast. It does not change as long as the information content of the multiplexed data is the same, but when the information content of the FM multiplexed data being broadcast is updated, the information content stored in the internal memory also becomes
The new information content is overwritten and changed to the new information content.

To display multiplexed data such as program data stored in the internal memory on the display unit, the user operates a designation key or the like for designating the display of the multiplexed data. The information content of the specified program data in the program data stored in the internal memory is read based on the data header of the program data, for example, the data header of the program data, and the read information content is transmitted to the display unit and displayed. Things.

[0006]

In the above-mentioned known FM multiplex broadcast receiver, the FM multiplex broadcast receiver uses an FM multiplex broadcast receiver.
When a multiplex broadcast signal is received and the information content in the FM multiplex data is displayed on the display unit, the information content displayed on the display unit is changed unless the information content is changed on the FM broadcast station side.
Since the same thing is repeatedly displayed several times, the user must always look at the same display content. On the other hand, in order to avoid such annoyance, the FM multiplex broadcast receiver may be changed to receive a new FM multiplex broadcast signal, and the information content in the new FM multiplex data may be displayed on the display unit. This time, this information content is displayed on the display unit many times, and the user cannot avoid the trouble of having to look at the same display content again.

As described above, the known FM multiplex broadcasting receiver has a problem that it is troublesome to see the same display content many times. When trying to avoid such trouble, FM multiplexing is constantly performed. It is necessary to change the broadcast receiver to receive another FM multiplex broadcast signal, and the change of the FM multiplex broadcast signal reception of the FM multiplex broadcast receiver is performed when the user is a driver of an automobile. There is a problem that the attention of the user when driving the car is distracted by paying attention to the channel selection operation. When the user is not the driver of the car, the user's attention during driving the car is not distracted. However, always performing the tuning operation of the FM multiplex broadcast receiver is a matter of tuning operation. It's not good.

An object of the present invention is to eliminate the above-mentioned problem, and an object of the present invention is to enable reception of two or more FM multiplex broadcast signals without performing a tuning operation of an FM multiplex broadcast receiver. An object of the present invention is to provide an FM multiplex broadcast receiver.

[0009]

In order to achieve the above-mentioned object, the present invention provides a radio communication system in which FM multiplex data is multiplexed.
Receiving an M multiplex broadcast signal, storing the FM multiplex data in the received FM multiplex broadcast signal in an internal memory, selectively reading out the program data in the FM multiplex data stored in the internal memory, F to be displayed on
In an M multiplex broadcast receiver, at least two FM multiplexes
Alternate reception mode for alternately receiving FM multiplex broadcast signals from broadcast stations
A mode setting section that can be set to a mode, and the mode setting section
At least two FMs when set to alternate reception mode
A switching cycle setting unit for setting a switching cycle of the multiplex broadcast signal;
The switching cycle set by the switching cycle setting unit reduces
While switching between two FM multiplex stations alternately
Together when the turn <br/> set data in the FM multiplex data of the FM multiplex broadcasting station is broadcasting stored respectively in the internal memory
To receive FM multiplex broadcast signals from one FM multiplex broadcast station
When the mode is switched, the relevant value stored in the internal memory is
A control unit that reads out the program data of the FM multiplex broadcasting station and operates to display the program data on the display unit.

According to another aspect of the present invention, an FM multiplex broadcast signal in which FM multiplex data is multiplexed is received, and the FM multiplex broadcast signal in the received FM multiplex broadcast signal is received.
In an FM multiplex broadcast receiver configured to store multiplexed data in an internal memory, selectively read out program data in the FM multiplexed data stored in the internal memory, and display the program data on a display unit, at least two FM multiplexed broadcasts are provided. Broadcasting station F
Set to alternate reception mode to receive M multiplex broadcast signals alternately
Possible mode setting part, read from the internal memory
Program management data that detects program management data in
Data detection unit and the mode setting unit are set to the alternate reception mode.
When the program management data is detected, the program management data
And a switching unit for switching the FM multiplex broadcast signal of the currently receiving FM multiplex broadcast station to the reception of the FM multiplex broadcast signal of another FM multiplex broadcast station , and a switching tie of the switch unit.
Switching each FM multiplex broadcasting station by
Et al., When the FM multiplex broadcast station stores respectively <br/> program data of an FM multiplex data broadcasting in the internal memory together
To receive FM multiplex broadcast signals from one FM multiplex broadcast station
When the mode is switched, the relevant value stored in the internal memory is
A control unit that reads out the program data of the FM multiplex broadcasting station and operates to display the program data on the display unit.

[0011]

In the first means, two or more FM multiplex broadcast receiving stations are switched by switching the tuning frequency of the tuner selecting section at a predetermined fixed cycle, and by switching the receiving stations. Two or more received F
The program data in the FM multiplex data of the M multiplex broadcast signal is temporarily stored in an internal memory, and two or more F
In response to the switching of the M multiplex broadcasting receiving station, that is, every time the switching of the FM multiplex broadcasting receiving station is performed, the temporarily stored new program data is sequentially read from the internal memory, and the read program data is read out. Is displayed on the display unit.

Thus, according to the first means, 1
By using only one FM multiplex broadcast receiving station, program data in FM multiplex data transmitted from two or more FM multiplex broadcast stations can be sequentially and alternately displayed on the display unit. This makes it possible to avoid the hassle of repeatedly viewing information contents.

In the second means, two or more FM multiplex broadcast receiving stations are switched by switching a tuning frequency of a tuner selecting section at a required cycle, and by switching the receiving stations. Two or more received F
The program data in the FM multiplex data of the M multiplex broadcast signal is temporarily stored in the internal memory. When one program data is displayed on the display unit and the program management data is detected, the internal memory is read from the internal memory. The next program data is read, and the read program data at this time is newly displayed on the display unit.

As described above, according to the second means, similar to the first means, only one FM multiplex broadcast receiving station is used, and the display unit displays two or more FM multiplex broadcast stations. The program data in the FM multiplex data to be transmitted can be sequentially and alternately displayed, so that it is possible to avoid the trouble of the user viewing the same information content several times on the display unit.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

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

In FIG. 1, 1 is an FM / AM tuner,
1a is a front end (F / E), 1b is an intermediate frequency circuit / demodulation circuit (IFAMP DET), 2 is a multiplexer (NCMPX), 3 is an audio signal amplifier circuit (AMP),
4 is a speaker (SP), 5 is a multiplexed data demodulation circuit (L-
MSK demodulation), 6 is a synchronous error correction unit, 7 is a control unit (C
PU), 8 is an internal memory (RAM), 9 is a display drive unit,
Reference numeral 10 denotes a display unit, 11 denotes a mode selection switch, and 12 denotes a switching cycle setting timer.

The FM / AM tuner 1 includes a front end 1a and an intermediate frequency circuit / demodulation circuit 1b. The input of the front end 1a is connected to an antenna.
The output of the intermediate frequency circuit and demodulation circuit 1b is connected to each input of the subsequent multiplexer 2 and multiplexed data demodulation circuit 5.
The multiplexer 2 includes a noise canceller circuit section and a stereo signal demodulation section (both not shown), and an output of the stereo signal demodulation section is connected to an input of the succeeding audio signal amplification circuit 3. The audio signal amplifying circuit 3 has two or more channels, and their outputs are individually connected to a speaker 4 (only one is shown). The multiplex data demodulation circuit 5
The output of the FM multiplexed data is demodulated, and its output is connected to the input of the next synchronous error correction unit 6. The synchronous error correction unit 6 corrects the error of the demodulated multiplexed data, and its output is connected to the control unit 7. The control unit 7 sets F
It controls the overall operation of the M multiplex broadcast receiver, and includes an internal memory 8, a display drive unit 9, a mode selection switch 11,
In addition to being connected to the switching period setting timer 12, it is also connected to the FM / AM tuner 1. The display drive unit 9 decodes traffic information and character information representing characters, maps, figures, and the like, and additional information and the like into information codes suitable for display. The output is connected to the display unit 10.
The display unit 10 appropriately displays the information code supplied from the display drive unit 9 on a display screen (not shown).
The mode selection switch 11 switches and sets an operation mode of the FM multiplex broadcast receiver, and can select a normal operation mode such as an FM broadcast signal reception mode, an AM broadcast signal reception mode, and a seek mode. In addition, selection of the multiple-station alternate reception mode, that is, selection of the two-station alternate reception mode, the three-station alternate reception mode, and the like can be performed. In this case, the mode selection switch 11 is set to the multiple station alternate reception mode,
For example, when switching to the two-station alternate reception mode is set, the selection of the two stations to be alternately received is performed, for example, by operating a preset key (not shown).
The switching cycle setting timer 12 sets a switching cycle of a plurality of stations that are alternately received when the mode selection switch 11 is switched to the multiple station alternate reception mode.

[0019] The FM multiplex broadcast receiver according to the above configuration includes:
It works as follows.

First, the operation of reproducing a broadcast signal in the FM multiplex broadcast receiver according to the first embodiment will be described.
When the AM tuner 1 is set to the receiving state of the FM broadcast signal frequency band, when the FM multiplex broadcast signal is received by the antenna, the received FM multiplex broadcast signal becomes the FM / FM broadcast signal.
After high frequency amplification in the AM front end 1a,
It is converted to an intermediate frequency signal. Next, the intermediate frequency signal is subjected to FM demodulation in an intermediate frequency circuit / demodulation circuit 1b and then subjected to FM demodulation to become a demodulated signal. Subsequently, the demodulated signal is subjected to noise elimination and demodulation into a stereo signal in the multiplexer 2, and is demodulated into audio frequency signals of the left channel and the right channel. Subsequently, the audio frequency signals of the left channel and the right channel are amplified in the audio signal amplifier circuit 3, supplied to the left speaker 4 and the right speaker 4, respectively, and reproduced as stereo signals. On the other hand, FM / AM
When the tuner 1 is set to the receiving state of the AM broadcast signal frequency band, when the AM broadcast signal is received by the antenna, the received AM broadcast signal is subjected to high-frequency amplification in the FM / AM front end 1a. It is converted to an intermediate frequency signal. Then, the intermediate frequency signal is subjected to AM detection and removal of noise components and the like in an intermediate frequency circuit / demodulation circuit 1b, and then subjected to AM detection to become an audio frequency signal. Subsequently, the audio frequency signal is supplied to the audio signal amplifier circuit 3 via the multiplexer 2, then amplified in the audio signal amplifier circuit 3, and supplied to the left speaker 4 and the right speaker 4, respectively, to be a monaural signal. Will be played.

Next, the operation of storing the multiplexed data in the internal memory 8 in the FM multiplex broadcast receiver of the first embodiment will be described. The FM multiplex broadcast receiver is set to the receiving state of the FM multiplex broadcast signal. When the FM / AM tuner 1 receives an FM multiplex broadcast signal, the FM / AM tuner 1
The demodulated signal obtained at the output side of the AM tuner 1 is supplied to a multiplexed data demodulation circuit 5, where reproduction and demodulation of FM multiplexed data is performed. Then, the demodulated multiplex data is
The data is supplied to a synchronous error correction unit 6, where error correction of multiplexed data is performed. Next, the error-corrected multiplexed data is supplied to the control unit 7, where the multiplexed data is sorted for each data type based on a data header added to the head of the multiplexed data. At this time, the program data in the multiplexed data is supplied from the control unit 7 to the internal memory 8 and stored in a predetermined address area of the internal memory 8. On the other hand, when the FM multiplex broadcast receiver is set to the AM broadcast signal receiving state,
Since FM multiplex data is not superimposed on the broadcast signal,
The control unit 7 cannot take out the multiplexed data, and no data is stored in the internal memory 8.

Here, FIG. 2A shows the F of the first embodiment.
FIG. 7 is an operation explanatory diagram illustrating an example of an alternate reception operation of a plurality of stations performed by the M multiplex broadcast receiver. In FIG. 2A, the vertical axis represents reception or non-reception of broadcast signals from stations A and B, and the horizontal axis represents time.

The alternate reception operation of a plurality of stations performed by the FM multiplex broadcast receiver according to the first embodiment will be described with reference to FIG.

First, the mode selection switch 11 of the FM multiplex broadcasting receiver is operated, and one of the multiple station alternate reception modes is set.
For example, switching to the two-station alternate reception mode, and then operating the preset keys on the desired two stations, for example, the A station and the B station, among the plurality of stations preset to the plurality of preset keys (not shown). , And at the same time, the switching cycle setting timer 12 sets the alternate reception switching cycle of the selected two stations. When such setting is performed, the FM multiplex broadcast receiver, under the control of the control unit 7,
The tuner 1 (not shown) of the tuner 1 operates from time t ₁ to t ₂
Until, during the time t ₃ to t _4, the time t ₅ t
Receiving an FM multiplex broadcast signals from each A station like until _6, whereas, during the time t ₂ to t _3, FM multiplex broadcasting from each B station during etc. from time t ₄ to t ₅ Switch to receive the signal. By the way, FM / A
When the M tuner 1 receives the FM multiplex broadcast signal from the A station, as described above, the program data in the FM multiplex data of the FM multiplex broadcast signal (hereinafter, this program data is referred to as the A station program data). Is stored in the internal memory 8. On the other hand, when the FM / AM tuner 1 receives the FM multiplex broadcast signal from the station B, the program data in the FM multiplex data of the FM multiplex broadcast signal (hereinafter, this program The data is referred to as B station program data) is stored in the internal memory 8. Then, the tuning unit of the FM / AM tuner 1 receives the FM from the A station.
While being switched to receive the multiplex broadcast signal, the control section 7 reads out the station A program data stored in the internal memory 8 and supplies it to the display section 10 to display the information content of the station A program data. It is displayed on the display unit 10. On the other hand, FM /
When the tuning section of the AM tuner 1 is switched to receive the FM multiplex broadcast signal from the station B, the control section 7 stores the information content of the station A program data in the internal memory 8 instead of displaying the information content of the station A program data up to that time. The stored station B program data is read and supplied to the display unit 10, and the information content of the station B program data is displayed on the display unit 10. Furthermore, FM / AM tuner 1
Is switched again to receive the FM multiplex broadcast signal from the station A, the control section 7 reads out the station A program data stored in the internal memory 8, and reads the information content of the station A program data. Is displayed on the display unit 10. In the same manner, the information content of the program data displayed on the display unit 10 is the same in accordance with the switching of the reception of the FM multiplex broadcast signal by the tuning unit of the FM / AM tuner 1. It is switched as follows.

In the above description, the case where the mode selection switch 11 is switched to the two-station alternate reception mode among the multiple-station alternate reception mode, and the FM multiplex broadcast signals from the stations A and B are alternately received. Mode, the mode selection switch 11 is switched to the three-station alternate reception mode among the multiple-station alternate reception mode, and the FM multiplex broadcast signals from the A, B, and C stations are alternated. Is almost the same as the above operation.

As described above, according to the first embodiment, only one FM multiplex broadcast receiving station is used, and the display unit 10 displays the FM multiplex data transmitted from two or more FM multiplex broadcast stations. The program data can be sequentially and alternately displayed, so that the trouble of the user viewing the same information content on the display unit 10 several times is avoided.

FIG. 3 is a block diagram showing the configuration of a second embodiment of the FM multiplex broadcast receiver according to the present invention.

In FIG. 3, reference numeral 13 denotes a program management data detection unit, and other components which are the same as those shown in FIG. 1 are given the same reference numerals.

The program management data detecting section 13 is connected to the control section 7 and constantly monitors the information content of the program data displayed on the display section 10. That is, the program management data detection unit 13 supplies the detection output to the control unit 7 immediately when the display of the program data starting from the program management data is cycled through the display unit 10 and the presence of the program management data is detected again. . Upon receiving this detection output, the control unit 7 switches the channel selection unit of the FM / AM tuner 1 to switch the FM multiplex broadcast signal to be received, and also switches the program data to be displayed on the display unit 10 at the same time.

In this case, the second embodiment and the first embodiment
The difference between the first embodiment and the second embodiment is that the first embodiment has the switching period setting timer 12 and does not have the program management data detection unit 13, whereas the second embodiment has the program management data detection unit 13. The second embodiment is different from the first embodiment in that the second embodiment is different from the first embodiment only in that the second embodiment is provided with the switching unit 13 and the switching period setting timer 12 is not provided. The description of the configuration other than the program management data detection unit 13 in the embodiment is omitted.

The operation of reproducing the broadcast signal and the operation of storing the multiplexed data in the internal memory 8 in the second embodiment are both the operation of reproducing the broadcast signal and the operation of storing the multiplexed data in the first embodiment. The operation of storing and storing the broadcast signal in the internal memory 8 and the operation of storing and storing the multiplexed data in the internal memory 8 in the second embodiment are also omitted because they are exactly the same as the operation of storing and storing in the internal memory 8.

FIG. 2B is an operation explanatory diagram showing an example of an alternate reception operation of a plurality of stations performed by the FM multiplex broadcast receiver according to the second embodiment. In FIG. 2B, the vertical axis represents reception or non-reception of broadcast signals from stations A and B, and the horizontal axis represents time.

The alternate reception operation of a plurality of stations performed by the FM multiplex broadcast receiver according to the second embodiment will be described with reference to FIG.

Also in the second embodiment, first, the mode selection switch 11 of the FM multiplex broadcasting receiver is operated to switch to one of a plurality of station alternate reception modes, for example, a two-station alternate reception mode. A desired 2 of a plurality of stations preset by a plurality of preset keys not shown
Stations, for example, stations A and B are selected by operating a preset key. When such setting is performed, the FM multiplex broadcast receiver, under the control of the control unit 7, causes the tuning unit (not shown) of the FM / AM tuner 1 to perform
During times t ₂ to t ₃ , for example, FM multiplex broadcast signals from station A are received, while time t ₁ to t ₂
In the meantime, switching is performed so as to receive the FM multiplex broadcast signal from the B station. Also in this case, FM /
When the AM tuner 1 receives the FM multiplex broadcast signal from the A station, the program data in the FM multiplex data of the FM multiplex broadcast signal (hereinafter, this program data is also referred to as the A station program data) is stored in the internal memory 8. , While F
Even when the M / AM tuner 1 receives an FM multiplex broadcast signal from the B station, the program data in the FM multiplex data of the FM multiplex broadcast signal (hereinafter, this program data is also referred to as B station program data) is internally stored. It is stored in the memory 8. Then, the tuning unit of the FM / AM tuner 1 receives the FM from the A station.
While being switched to receive the multiplex broadcast signal, the control section 7 reads out the station A program data stored in the internal memory 8 and supplies it to the display section 10 to display the information content of the station A program data. It is displayed on the display unit 10. On the other hand, FM /
When the tuning section of the AM tuner 1 is switched to receive the FM multiplex broadcast signal from the station B, the control section 7 replaces the display of the information content of the program data of the station A and stores the information content in the internal memory 8. The B station program data read out is supplied to the display unit 10 and the information content of the B station program data is displayed on the display unit 10. Further, when the tuning unit of the FM / AM tuner 1 is switched again to receive the FM multiplex broadcast signal from the A station, the control unit 7 reads out the A station program data stored and stored in the internal memory 8, The information content of the program data of the station A is displayed on the display unit 10, and similarly displayed on the display unit 10 corresponding to the switching of the reception of the FM multiplex broadcast signal by the channel selection unit of the FM / AM tuner 1. The point that the information content of the program data is also switched in the same manner as in the first embodiment.

The operation of the second embodiment has been described.
Except for the point that the operation is the same as that of the first embodiment, as described below, the second embodiment is
The point that the switching of the reception of the M multiplex broadcast signal is performed when the program data displayed on the display unit 10 makes one cycle,
The operation is fundamentally different from that of the first embodiment.

That is, in the FM multiplex broadcast receiver according to the second embodiment, the program management data detecting section 13
Is constantly monitored, and the display of the program data starting from the program management data and consisting of a series of a plurality of page data makes a full round on the display unit 10, and again,
When it detects that program management data has repeatedly arrived,
The control section 7 transmits the program management data detection output. At this time, upon receiving the program management data detection output, the control unit 7 immediately switches the channel selection unit of the FM / AM tuner 1 to switch the FM multiplex broadcast signal to be received, and at the same time, changes the program data to be displayed on the display unit 10. Switching is performed. More specifically, just before time t ₁ , the tuning section of the FM / AM tuner 1 has been switched to receive the FM multiplex broadcast signal from the station A, and the display is made in response to the switching. When it is assumed that the A-station program data is also displayed in the unit 10, at time t ₁ , the A-station program data displayed on the display unit 10 makes a round, and the program management data detection unit 13 outputs the program management data. Is detected, the program management data detection output is transmitted to the control unit 7.
Then, in response to the program management data detection output, the control unit 7 switches the channel selection unit of the FM / AM tuner 1 to receive the FM multiplex broadcast signal from the station B, and to read the B station program data from the internal memory 8. Is read, and the B station program data is transmitted to the display unit 10 for display. Next, time t
_When the program management data detection unit 13 detects the arrival of the program management data, the program management data detection unit 13 controls the program management data detection output in the same manner as before. 7 is transmitted. Also in this case, the control unit 7
Responds to this program management data detection output, and outputs FM / AM
The tuner 1 is switched again to receive the FM multiplex broadcast signal from the station A, read the station A program data from the internal memory 8 and display the station A program data.
0, and thereafter, every time the program management data detection unit 13 detects the arrival of the program management data,
Switching of the FM multiplex broadcast signal received by switching of the channel selection unit of the M / AM tuner 1 and switching of program data displayed on the display unit 10 in response to the switching.

Also in the above description, the case where the mode selection switch 11 is switched to the two-station alternate reception mode among the multiple-station alternate reception mode, and the FM multiplex broadcast signals from the stations A and B are alternately received. Mode, the mode selection switch 11 is switched to the three-station alternate reception mode among the multiple-station alternate reception mode, and the FM multiplex broadcast signals from the A, B, and C stations are alternated. Is almost the same as the above operation.

As described above, according to the second embodiment, only one FM multiplex broadcast receiving station is used, and the display unit 10 displays the FM multiplex data transmitted from two or more FM multiplex broadcast stations. The program data can be sequentially and alternately displayed, and the trouble of the user viewing the same information content on the display unit 10 several times can be avoided. Also,
According to the second embodiment, the switching of the FM multiplex broadcast signal includes:
Since the display is performed in conjunction with one cycle of the program data displayed on the display unit 10, the display content on the display unit 10 and the switching of the FM multiplex broadcast signal can be completely matched.

[0039]

As described above, according to the first aspect of the present invention, two or more FMs are switched by switching the tuning frequency of the tuning section of the FM / AM tuner 1 at a predetermined constant cycle. Switching the multiplex broadcast receiving station, temporarily storing the program data in the FM multiplex data of the two or more FM multiplex broadcast signals received by the switching of the receiving station in the internal memory 8, and In response to the switching of the FM multiplex broadcasting receiving station, that is, every time the switching of the FM multiplex broadcasting receiving station is performed, the temporarily stored new program data is sequentially read from the internal memory 8, and this read is performed. The program data is displayed on the display unit 10.

As described above, according to the first aspect of the present invention, two or more FM multiplexes are displayed on the display unit 10 using one FM multiplex broadcast receiving station without performing any channel selection operation. The program data in the FM multiplex data transmitted from the broadcasting station can be sequentially and alternately displayed.
This has the effect of avoiding the hassle of viewing the same information content many times.

According to the second aspect of the present invention, FM /
By switching the tuning frequency of the tuning section of the AM tuner 1 in a required cycle, two or more FM multiplex broadcast receiving stations are switched, and the two or more received FM multiplex broadcast receiving stations are switched.
The program data in the FM multiplex data of one or more FM multiplex broadcast signals is temporarily stored in the internal memory 8, and the program management data is detected when one program data is displayed on the display unit 10. Then, the next program data is read from the internal memory 8, and the read program data is newly displayed on the display unit.

As described above, according to the second aspect of the present invention, two or more FM multiplexes are displayed on the display unit 10 using one FM multiplex broadcast receiving station without performing any channel selection operation. The program data in the FM multiplex data transmitted from the broadcasting station can be sequentially and alternately displayed.
This has the effect of making it possible to avoid the hassle of viewing the same information content many times. According to the second aspect of the present invention, the switching of the FM multiplex broadcast signal is performed together with the cycle of the program data displayed on the display unit 10, so that the display contents on the display unit 10 and the FM multiplex broadcast signal are switched. There is also an effect that the switching of the broadcast signal can be completely matched.

[Brief description of the drawings]

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

FIG. 2 is an operation explanatory diagram showing an example of an alternate reception operation of a plurality of stations performed by the FM multiplex broadcast receivers of the first embodiment and the second embodiment.

FIG. 3 is a block diagram showing a configuration of an FM multiplex broadcast receiver according to a second embodiment of the present invention;

[Explanation of symbols]

 Reference Signs List 1 FM / AM tuner 1a Front end (F / E) 1b Intermediate frequency circuit and demodulation circuit (IFAMP DET) 2 Multiplexer (NCMPX) 3 Audio signal amplifier circuit (AMP) 4 Speaker (SP) 5 Multiplexed data demodulation circuit (L-) MSK demodulation) 6 Synchronous error correction unit 7 Control unit (CPU) 8 Internal memory (RAM) 9 Display drive unit 10 Display unit 11 Mode selection switch 12 Switching cycle setting timer 13 Program management data detection unit

Claims (2)

(57) [Claims] 1. An FM in which FM multiplex data is multiplexed.
A multiplex broadcast signal is received, the FM multiplex data in the received FM multiplex broadcast signal is stored in an internal memory, and the program data in the FM multiplex data stored in the internal memory is selectively read out. FM to be displayed
In a multiplex broadcast receiver, at least two FM multiplex broadcasts
Alternate reception mode for alternately receiving FM multiplex broadcast signals from the transmitting station
The mode setting section that can be set to the mode and the mode setting section
When set to the alternate reception mode, at least two FM
A switching cycle setting section for setting a switching cycle of a double broadcast signal;
At least according to the switching cycle set in the switching cycle setting section.
Also switch between two FM multiplex stations alternately
Stores respectively in the internal memory of the program data in the FM multiplex data FM multiplex broadcasting station is broadcasting,
Switch to reception of FM multiplex broadcast signal of one FM multiplex broadcast station
When it is obtained, the FM stored in the internal memory
An FM multiplex broadcast receiver comprising: a control unit that operates to read program data of a multiplex broadcast station and display the program data on a display unit. 2. An FM in which FM multiplexed data is multiplexed.
A multiplex broadcast signal is received, the FM multiplex data in the received FM multiplex broadcast signal is stored in an internal memory, and the program data in the FM multiplex data stored in the internal memory is selectively read out. FM to be displayed
In a multiplex broadcast receiver, at least two FM multiplex broadcasts
Alternate reception mode for alternately receiving FM multiplex broadcast signals from the transmitting station
Mode setting section that can be set to
Number for detecting program management data in the program data
The pair management data detection unit and the mode setting unit
When the program management data detection unit is set to
When the pair management data is detected, the currently multiplexed FM multiplex is received.
The FM multiplex broadcast signal of a broadcast station is converted to the FM of another FM multiplex broadcast station .
A switching unit for switching to reception of a multiplex broadcast signal ;
Each FM multiplex broadcasting station is switched alternately by switching timing
In addition, FM multiplex data broadcasted by each FM multiplex broadcasting station
Storing each program data over data in the internal memory
Together with the FM multiplex broadcast signal of one FM multiplex broadcast station.
When switching to reception, the data stored in the internal memory
That the FM reads program data multiplex broadcasting station, FM multiplex broadcasting receiver, wherein the this <br/> that a control unit that operates so as to display on the display unit.