JPH09261090A - Fm multiplex broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an FM multiplex broadcast receiver displaying immediately required traffic information, independently of a broadcast content being received in the case that the user desires to obtain current traffic information. SOLUTION: This receiver is provided with an FM multiplex broadcast signal reception section 1A receiving an FM multiplex broadcast signal on which teletext information is multiplexed, a memory 12 storing the teletext information of the received FM multiplex broadcast signal, a control section 9 controlling the operation of each section, a key destination section 11 and a display section 13 displaying the teletext information. In this case, when the key operation section 11 is used to select traffic information in the teletext information, the FM multiplex broadcast signal reception section 1A receives sequentially the FM multiplex broadcast signal on which the teletext information is superimposed respectively for a prescribed time only, the control section 9 extracts only the traffic information based on a head parameter ancillary to the teletext information and the information is stored in the memory 12 and when the reception of the FM multiplex broadcast is circulated, the traffic information stored in the memory 12 and displayed on the display section 13.

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 determine the presence or absence of traffic information in an FM multiplex broadcast signal in which character information is multiplexed on a program-by-program basis.
The present invention relates to an FM multiplex broadcast receiver that collectively displays programs with traffic information on a display unit.

[0002]

2. Description of the Related Art Generally, an FM multiplex broadcast signal has a normal F
It is composed of an M broadcast signal and character information multiplexed on the FM broadcast signal. The character information includes information contents such as traffic information and various general information, and is on the baseband of the FM broadcast signal. Is multiplexed in the high frequency region of. Then, the FM multiplex broadcast signal is transmitted from a station that broadcasts character information such as traffic information and various general information.

Upon receiving the FM multiplex broadcast signal, the FM multiplex broadcast receiver demodulates the FM multiplex broadcast signal and then extracts character information including traffic information and various general information in the broadcast signal, and extracts the character information. The stored character information is stored in the memory, the character information stored in the memory is appropriately read, and the character information is displayed on the display unit.

In this case, among FM multiplex broadcast signals that can be received by a known FM multiplex broadcast receiver, for example, Vic
In addition to broadcasting stations that exclusively broadcast traffic information, such as s broadcasting (hereinafter, this is referred to as the first type broadcasting station), for example, JFN series broadcasting or FM Japan (registered trademark) series broadcasting There is a broadcasting station (hereinafter, referred to as a second type broadcasting station) that normally broadcasts general information and inserts traffic information in the information as appropriate. There is also a broadcasting station (hereinafter, referred to as a third type broadcasting station) that generally broadcasts general information but does not broadcast traffic information at all.

[0005]

In the known FM multiplex broadcast receiver, when the user is receiving a broadcast from the first type broadcasting station that broadcasts only traffic information, the user is When you want to know traffic information,
The required traffic information can be immediately displayed on the display unit by operating the operation key once.

On the other hand, if the user is receiving a broadcast from the second type broadcasting station or the third type broadcasting station which is broadcasting general information, the user is currently receiving the information due to the circumstances of the user side. When you want to know traffic information,
The menu (table of contents) is displayed on the display unit from the character information in the FM multiplex broadcast signal broadcast from the second type broadcasting station, and after viewing the menu (table of contents), the broadcast program is sequentially selected and changed. Various operations are required to search for traffic information and display the searched traffic information on the display unit.

As described above, when the known FM multiplex broadcast receiver wants to know the current traffic information, it cannot immediately display the required traffic information on the display unit depending on the received broadcast content. I have a problem.

The present invention solves such a problem, and an object of the present invention is to display the required traffic information immediately regardless of the broadcast contents being received when the current traffic information is desired. It is to provide a possible FM multiplex broadcast receiver.

[0009]

In order to achieve the above object, an FM multiplex broadcast receiver is operated with a key for selecting traffic information in character information multiplexed in an FM multiplex broadcast signal. Then, the FM multiplex broadcast signal receiving section receives the FM multiplex broadcast signals in which the character information is multiplexed in sequence for a predetermined time respectively, and at the time of reception, the control section transmits the traffic based on the header parameter attached to the character information. After only the information is extracted, the extracted traffic information is sequentially stored in the memory, and when the reception of the FM multiplex broadcast signal in the FM multiplex broadcast signal reception section has completed, the traffic information stored in the memory is read out and displayed. It is equipped with means for transferring to a department and displaying it.

By adopting such means, the user can automatically operate the traffic information in the character information multiplexed in the receivable FM multiplex broadcast signal by operating the key for selecting the traffic information. And when the collection is completed,
The collected traffic information can be displayed on the display unit, and unlike the known FM multiplex broadcast receiver, many operations are not required to select and collect the traffic information.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the embodiment of the present invention, F
The M-multiplex broadcast receiver receives at least an FM multiplex-broadcast signal receiving unit that receives an FM multiplex-broadcast signal in which character information is multiplexed, a control unit that controls the operation of each unit, and control by the control unit. When character information in the FM multiplex broadcast signal is extracted, a memory that sequentially stores the extracted character information, a key operation unit including a key for selecting traffic information, and a memory that is stored in the memory under the control of the control unit And a display unit that displays the text information when the text information is read.

In this case, when the traffic information selection key in the key operation unit is operated to select the traffic information in the text information, the FM information in which the text information receivable in the FM multiplex broadcast signal reception unit is multiplexed. The multiplex broadcast signals are sequentially received for a certain period of time, and when the FM multiplex broadcast signal is received, the control unit extracts only the traffic information based on the header parameter attached to the character information and stores the extracted traffic information in the memory. Then, when the reception of the FM multiplex broadcast signal by the FM multiplex broadcast signal receiving circuit has completed one cycle, the traffic information stored in the memory is read out by the control unit,
The read traffic information is transferred to the display unit and displayed there.

As described above, according to the embodiment of the present invention, the user only operates the key for selecting the traffic information, and the character information multiplexed in the receivable FM multiplex broadcast signal is displayed. The traffic information in the memory is automatically stored and collected in the memory, and when the memory collection is completed, the traffic information stored and collected in the memory is displayed on the display unit. The required traffic information can be immediately displayed regardless of the broadcast content of the broadcast signal being transmitted.

[0014]

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

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

In FIG. 1, 1 is an FM front end {FM (F / E)}, 2 is an intermediate frequency amplifier circuit (IFAM).
P), 3 is an FM demodulation circuit (FMDET), 4 is a multiplexer with a noise canceller (NCMPX), 5 is an audio signal amplification circuit (AFAMP), 6 is a speaker (SP),
7 is an L-MSK demodulation circuit, 8 is a synchronization / error correction circuit, 9
Is a control unit (CPU), 10 is a preset key for tuning, 1
Reference numeral 1 is an information selection key, 12 is a memory, and 13 is a display unit. The FM front end 1, the intermediate frequency amplifier circuit 2, the FM
The demodulation circuit 3 constitutes an FM multiplex broadcast signal receiving section (FM tuner) 1A.

The FM front end 1 comprises a high frequency circuit section, a frequency conversion circuit section, and a tuning circuit section (none of which is shown). The input terminal is connected to the antenna and the output terminal is the input of the intermediate frequency amplifier circuit 2. The controller 9 is connected to the end, and the control end is connected to the control unit 9. The intermediate frequency amplification circuit 2 is composed of an intermediate frequency circuit section and an amplitude limiting section (neither of which is shown). One output terminal is connected to the input terminal of the FM demodulation circuit 3 and the other output terminal is connected to the control section 9. To be done. The FM demodulation circuit 3
One output end is multiplexer 4 with noise canceller
Of the L-MSK demodulation circuit 7, and the other output terminal is connected to the input terminal of the L-MSK demodulation circuit 7. The multiplexer 4 with a noise canceller comprises a noise canceller circuit section and a stereo signal demodulation section (neither is shown), and the output end is connected to the input end of the audio signal amplification circuit 5. The audio signal amplifier circuit 5 has two or more channels, and their output ends are separately connected to the speaker 6. L-MSK demodulation circuit 7
Is FM multiplexed character information (digital data)
The output terminal is connected to the input terminal of the synchronization / error correction circuit 8. The synchronization / error correction circuit 8 performs synchronization and error correction of character information (digital data), and its output end is connected to one input end of the control unit 9. The control unit 9 controls the entire operation of the FM multiplex broadcast receiver, and includes a tuning preset key 10 and an information selection key 1.
1, the memory 12, and the display unit 13, respectively. The tuning preset key 10 is composed of a plurality of keys, and cooperates with a preset memory (not shown) to preset an FM multiplex broadcast signal to be preset for each key. The information selection key 11 includes at least a key (traffic information selection key) for selecting traffic information, and other keys for achieving various functions. The memory 12 is character information (digital data)
The traffic information extracted by the control unit 9 is also stored together with the general character information, as will be described in detail below. The display unit 13 has a small display surface made of liquid crystal or the like, and appropriately displays the character information read from the memory 12.

The FM multiplex broadcast receiver of the present embodiment having the above-mentioned configuration operates as follows.

Now, the user operates a desired one of the preset keys for channel selection 10 or F
When the tuning circuit section of the M front end 1 is manually operated, in response to the operation, in the tuning circuit section of the FM front end 1, the F preset to the operated key is set.
The M multiplex broadcast signal or the FM multiplex broadcast signal selected by manual operation is selectively received. The received broadcast signal is F
After being amplified by the high frequency circuit section of the M front end 1, it is converted into an intermediate frequency signal by the frequency conversion circuit section. The intermediate frequency signal is amplified by the intermediate frequency circuit section of the intermediate frequency amplifier circuit 2, noise components are removed by the amplitude limiting section, and then supplied to the FM demodulation circuit 3. In the FM demodulation circuit 3, the supplied intermediate frequency signal is FM demodulated and converted into a demodulated signal. The demodulated signal is supplied to the multiplexer with noise canceller 4, noise is removed in the noise canceller circuit unit, demodulated into left channel and right channel audio signals in the stereo signal demodulation unit, and supplied to the audio signal amplifier circuit 5. . In the audio signal amplifier circuit 5, the supplied left channel and right channel audio signals are amplified to a predetermined signal level and reproduced as stereo signals from the right speaker and the left speaker 6, respectively. on the other hand,
The demodulated signal obtained by the FM demodulation circuit 3 is also supplied to the L-MSK demodulation circuit 7, and the L-MSK demodulation circuit 7 reproduces and demodulates character information from the demodulated signal and supplies it to the synchronization / error correction circuit 8. To be done. The character information supplied from the synchronization / error correction circuit 8 is supplied to the control unit 9 after being subjected to synchronization and error correction. At this time, the control unit 9 sequentially transfers the supplied character information to the memory 12, and the memory 1
2 are sequentially stored in a predetermined area. Further, the control unit 9
In response to a user's request, predetermined character information stored in the memory 12 is sequentially read, and the read character information is supplied to the display unit 13 and displayed on the display unit 13.

When the user operates the traffic information selection key in the key operation unit 11, the control unit 9 sequentially controls the tuning circuit unit of the FM front end 1 at regular intervals to receive a receivable character broadcast. Are sequentially received, and the traffic information in the character information of these FM multiplex broadcast signals is searched. In this case, the traffic information is searched by the header parameter attached to the text information, and when the header parameter H'31 or H'33 representing the traffic information is obtained, the header parameter H'31, H'33 is added. The extracted character information (traffic information) is extracted, transferred to the memory 12, and sequentially stored and collected therein. When the FM front-end 1 receives one cycle of the FM multiplex broadcast signal, the control unit 9
Reads the traffic information stored and collected in the memory 12 at that time, transfers the read traffic information to the display unit 13,
This is what is displayed there.

FIG. 2 is a flow chart collectively showing the operation history when the traffic information selection key is operated in the FM multiplex broadcast receiver shown in FIG.

Now, using the flowchart of FIG.
The operation when the traffic information selection key is operated will be described again.

First, in step S1, the control unit 9
Tunes the tuning circuit section of the FM front end 1 to the first FM multiplex broadcast signal in the FM multiplex broadcast signals in which receivable teletext is multiplexed, and receives the first FM multiplex broadcast signal. .

Next, in step S2, the control unit 9
Starts a built-in reception timer (not shown).

Then, in step S3, the control unit 9
Determines whether or not there is a data group to be received in the first FM multiplex broadcast signal received. As a result of this judgment, it is judged that there is a data group to be received (Y).
If it is determined that there is no data group to be received (N), the process proceeds to the next step S4.
Move to

In the next step S4, the control unit 9
Determines whether the received data group includes traffic information of the head parameter H'31 or H'33 attached to the character information. As a result of this determination, when it is determined that the data group includes traffic information (Y), the process proceeds to the next step S5, and when it is determined that the data group does not include traffic information (N), the process proceeds to another step S6. To do.

Then, in step S5, the control unit 9
Extracts traffic information in the received data group,
The extracted traffic information is transferred to the memory 12 and stored in the memory 12.

Next, in step S6, the control unit 9
Determines whether the built-in reception timer has timed out. As a result of this determination, when it is determined that the reception timer has timed out (Y), the process proceeds to the next step S7, and when it is determined that the reception timer has not timed out yet (N), the process returns to the previous step S3. Again, the processing from step S3 is performed again.

Then, in step S7, the control unit 9
Tunes the tuning circuit section of the FM front end 1 to the next FM multiplex broadcast signal in the FM multiplex broadcast signals in which receivable teletext is multiplexed, and receives the next FM multiplex broadcast signal. .

Then, in step S8, the control unit 9
Determines whether or not the reception of the FM multiplex broadcast signal in which the receivable teletext is multiplexed has been received by the FM front end 1. As a result of this determination, when it is determined that the reception of the FM multiplex broadcast signal has completed one cycle (Y), the process proceeds to the next step S9, and when it is determined that the reception of the FM multiplex broadcast signal has not completed one cycle (N), The process returns to the previous step S2, and the processes after step S2 are performed again.

Then, in step S9, the control unit 9
Reads the traffic information stored in the memory 12, transfers the read traffic information to the display unit 13 to display the traffic information, and the series of operations ends.

As described above, according to the present embodiment, the user operates the key for selecting the traffic information on the key operation unit 11 to multiplex into the receivable FM multiplex broadcast signal. The traffic information in the text information is automatically stored and collected in the memory 12, and when the storage and collection in the memory 12 is completed, the stored and collected traffic information is displayed on the display unit 13. In order to obtain the required traffic information, the required traffic information can be displayed immediately regardless of the broadcast content of the received broadcast signal.

[0033]

As described above, according to the present invention, the user operates the key for selecting the traffic information, and among the character information multiplexed in the receivable FM multiplex broadcast signal. Traffic information is automatically stored and collected in the memory, and when storage and collection in the memory is completed, the traffic information stored and collected in the memory is transferred to the display and displayed. If desired, it is possible to immediately display the required traffic information regardless of the broadcast content of the broadcast signal being received.

[Brief description of drawings]

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

FIG. 2 is a flowchart collectively showing an operation history when a traffic information selection key is operated in the FM multiplex broadcast receiver shown in FIG.

[Explanation of symbols]

1 FM front end {FM (F / E)} 1A FM multiplex broadcast signal receiving unit (FM tuner) 2 Intermediate frequency amplification circuit (IFAMP) 3 FM demodulation circuit (FMDET) 4 Multiplexer with noise canceller (NCMP)
X) 5 audio signal amplification circuit (AFAMP) 6 speaker (SP) 7 L-MSK demodulation circuit 8 synchronization / error correction circuit 9 control unit (CPU) 10 preset key for channel selection 11 key operation unit 12 memory 13 display unit

Claims (1)

[Claims] 1. An FM multiplex broadcast signal receiving section for receiving an FM multiplex broadcast signal in which character information is multiplexed, a memory for storing character information of the received FM multiplex broadcast signal, and an operation of each section. In an FM multiplex broadcast receiver including a control unit for controlling, a key operation unit, and a display unit for displaying text information, the FM multiplex broadcast signal receiving unit when traffic information in the text information is selected Receives the FM multiplex broadcast signals in which the character information is multiplexed in order for a fixed time, and the control unit extracts only traffic information based on a header parameter attached to the character information and stores it in the memory. When the reception of the FM multiplex broadcast signal is completed, the traffic information stored in the memory is read out and displayed on the display unit. Belief.