JPH0865186A - Fm multiplex broadcast receiver - Google Patents

Abstract

PURPOSE: To quickly obtain map information (and road information) required based on a district name. CONSTITUTION: An FM multiplex broadcast signal on which at least FM multiplex data are multiplexed is received and the FM multiplex data in the received FM multiplex broadcast signal are stored tentatively in an internal memory 8 and part of the FM multiplex data stored in the internal memory 8 is selectively displayed on a display section 10. A district name list representing district names belonging to an area map is stored in the internal memory 8 in cross reference with a mesh code with respect to each are a map designated by the mesh code in the FM multiplex data and when at least one district is selected in the area name list and the mesh code having the selected area is received, the area information designated by the mesh code is automatically displayed on a display section 10.

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 mounted on an automobile or the like, and more particularly to an area map designated by a mesh code in FM multiplex data superimposed on an FM multiplex broadcast signal. The present invention relates to an FM multiplex broadcasting receiver which is selected based on a list showing a region name or which is calculated from the received electric field strength of an FM multiplex broadcasting signal which has received a regional map displaying the current location of an automobile.

[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 the baseband of the FM broadcast signal. , These FM broadcast signals and F
The M multiplex data is carried on the same carrier signal and is transmitted from the FM broadcast station as an FM multiplex broadcast signal.
The multiplex data includes traffic information, character information, or various additional information.

In this case, the traffic information in the FM multiplex data is attached with traffic information header data and can be clearly separated from other character information and various additional information, as will be described below. , Road information, map information and the like. That is, the road information is wide-area road information that represents road information that covers a range of multiple prefectures, middle-range road information that represents road information that covers a plurality of cities or towns, and narrow road information that represents road information that covers a range of several square kilometers. Area road information, highway information showing road information of various highways, general road information showing road information such as national roads and prefectural roads, and other information showing various contact information related to roads. ,
The map information is obtained by dividing Japan all over the map into a large number of meshes and assigning different mesh codes to each of these divided meshes. Depending on the size, it is composed of a primary mesh (relatively wide range) to which header data of the primary mesh and the secondary mesh are attached and a secondary mesh (narrow range than the primary mesh). Each of these divided map information is designated by a mesh code and sequentially transmitted from the FM multiplex broadcasting station in a predetermined order. When the FM multiplex broadcasting receiver side receives the map information, The area map included in the received map information is appropriately displayed on the display unit. On the other hand, the additional information in the FM multiplex data includes a broadcasting station broadcasting the same program content (program) as the own broadcasting station, that is, a broadcasting station name, a broadcasting frequency, a core station, which belong to the same affiliated station, It includes station data information representing a relay station, an alternative station, and the like.

By the way, in the known FM multiplex broadcast receiver, when the reception of traffic information is selected by the header data, road information and map included in the FM multiplex data superimposed on the FM multiplex broadcast signal. Information is sequentially selected and temporarily stored in the internal memory. Then, the road information and the map information stored in the internal memory are sequentially read out at a predetermined timing and sequentially reproduced and displayed on a display unit or the like attached to the FM multiplex broadcast receiver. Through such a process, the user (vehicle driver, etc.) can immediately grasp the road information and map information necessary for driving the vehicle by looking at the information content reproduced and displayed on the display unit or the like. It is a thing.

[0005]

However, in the known FM multiplex broadcasting receiver, when the reception of traffic information is selected, the road information and the map information included in the FM multiplex data of the FM multiplex broadcasting signal are selected. , Can be sequentially reproduced and displayed on the display unit, etc., but when the user wants to obtain only road information and map information of the area where the vehicle is currently traveling, it can be easily obtained as described below. It cannot be done.

First, when the name of the municipality (area name) of the area where the car is currently traveling is known, the road information of the area required or the road information or map information sequentially displayed on the display is displayed. Even if it is possible to understand what the map information is, the known FM multiplex broadcast receiver has a means for selectively reproducing and displaying only the road information and the map information of the required area on the display unit. Therefore, there is a problem that it is necessary to wait until the road information and the map information of the required area are reproduced and displayed on the display unit.

On the other hand, when the name of the municipality (regional name) of the area where the automobile is currently driving is not known, even if the road information and map information of the necessary area are reproduced and displayed on the display unit, the display. It is difficult to confirm that the contents are road information and map information of the area that requires it,
There is a problem that it takes a long time to obtain road information and map information of a required area, and in some cases, road information and map information of a required area cannot be obtained.

The present invention eliminates the above problems, and a first object of the present invention is to provide an FM multiplex broadcast receiver capable of promptly obtaining at least the necessary map information based on the area name. To provide.

A second object of the present invention is to provide an FM multiplex broadcast receiver capable of obtaining at least map information corresponding to the current position based on the received electric field strength of the received FM multiplex broadcast signal. Especially.

[0010]

In order to achieve the first object, the present invention receives an FM multiplex broadcast signal in which at least FM multiplex data is multiplexed, and receives the received FM multiplex broadcast signal.
The FM multiplex data in the multiplex broadcast signal is temporarily stored in the internal memory, and the F multiplexed data stored in the internal memory is temporarily stored.
In an FM multiplex broadcast receiver capable of selectively displaying a part of M multiplex data on a display unit, each regional map specified by a mesh code in the FM multiplex data belongs to the regional map. A region name list representing a region name is stored in the internal memory in association with the mesh code, and when at least one region in the region name list is selected, a mesh code having the selected region is received. In this case, there is provided a first means for automatically displaying the area information designated by the mesh code on the display section.

Further, in order to achieve the second object,
The present invention receives an FM multiplex broadcast signal in which at least FM multiplex data is multiplexed, temporarily stores the FM multiplex data in the received FM multiplex broadcast signal in a first internal memory, and F capable of selectively displaying the multiplex data on the display unit and temporarily storing the received electric field strength of the received FM multiplex broadcast signal in the second internal memory
In the M multiplex broadcasting receiver, for each area map designated by the mesh code in the FM multiplex data, the broadcasting station name and the broadcasting frequency of the nationwide net FM broadcasting station broadcasting the area are made to correspond to each mesh code. The FM multiplex broadcast signal of the nationwide net FM broadcast station received at the seek time of the broadcast signal, the broadcast station name and the broadcast frequency are stored in the first internal memory. The received electric field strength is stored in the second memory, respectively, and the first internal memory is based on the broadcasting station name and the broadcasting frequency of the FM multiplex broadcast signal indicating the maximum electric field strength stored in the second memory. , Read the mesh code corresponding to the above-mentioned nationwide net FM broadcasting station,
A second means is provided for displaying the area information (area map) designated by the read mesh code on the display unit.

[0012]

According to the first means, with respect to each area map designated by the mesh code in the FM multiplex data, the area name list showing the area names belonging to each area map is associated with the mesh code. When the user selects one area in the area name list and the mesh code related to the selected area is received, the area map specified by the mesh code is stored. Is read from the internal memory and is automatically displayed on the display unit, so that the user can immediately grasp the regional map (and road information) of the required region and the required region. There is no need to miss or confirm the local map (and road information) of No., and the waiting time until the local map (and road information) of the necessary area is obtained It can be sufficiently shorter than the FM multiplex broadcasting receiver of knowledge.

Further, according to the second means, for each regional map designated by the mesh code in the FM multiplex data, the FM of the national net for broadcasting those regions is provided.
The FM of the national net FM broadcasting station, which stores the broadcasting station name and broadcasting frequency of the broadcasting station in the first internal memory in association with each mesh code and is received at the seek time of the FM broadcasting signal.
Regarding a multiplex broadcast signal, its broadcast station name and broadcast frequency are stored in the first internal memory and its received electric field strength is stored in the second memory, respectively, and the maximum electric field strength stored in the second memory is shown. Based on the broadcasting station name and broadcasting frequency of the FM multiplex broadcasting signal, the mesh code corresponding to the national net FM broadcasting station stored in the first internal memory is read out, and the area map designated by the read mesh code is read out. Since I am trying to display it on the display part,
The user can surely obtain the regional map (and road information) corresponding to the current position of the automobile.

[0014]

Embodiments of the present invention will now be described 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 and demodulation circuit (IFAMP DET), 2 is a multiplexer (NCMPX), 3 is an audio signal amplification circuit (AMP),
4 is a speaker (SP), 5 is a multiple data demodulation circuit (L-
MSK demodulation), 6 is a synchronization 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 is a display unit, 11 is a preset key, 12 is a mode change switch, and 13 is an up / down (U / D) key.

The FM / AM tuner 1 comprises 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 / demodulation circuit 1b is connected to the respective inputs of the multiplexer 2 and the multiplex data demodulation circuit 5 that follow.
The multiplexer 2 comprises a noise canceller circuit section and a stereo signal demodulation section (both not shown), and the output of the stereo signal demodulation section is connected to the input of the next audio signal amplification circuit 3. The audio signal amplifier circuit 3 has two or more channels, and their outputs are separately connected to the speaker 4 (only one is shown). The multiplexed data demodulation circuit 5
The FM multiplexed data is demodulated, and its output is connected to the input of the next synchronization error correction unit 6. The synchronization error correction unit 6 performs error correction on the demodulated multiplexed data, and its output is connected to the control unit 7. The control unit 7
It controls the overall operation of the M multiplex broadcast receiver, and is connected to the internal memory 8, the display drive unit 9, the preset key 11, the mode changeover switch 12, and the up / down key 13, respectively, and also has an FM / AM tuner 1. Is also connected to. The display drive unit 9 decodes traffic information representing characters, maps, figures, etc., character information, additional information, etc. into an information code suitable for display, and its 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 preset key 11 is composed of a plurality of keys and is normally used as a preset key for channel selection. When the mode selection switch 12 is operated to switch to the display content selection mode, the preset key 11 is displayed on the display screen of the display unit 10. It is possible to select the number attached to each region name in the selected region name list by operating the key provided corresponding to the number. The mode selection switch 12 switches and sets the operation mode of the FM multiplex broadcast receiver, and is selected to the FM broadcast signal reception mode, the AM broadcast signal reception mode, the seek mode, etc. in addition to the display content selection mode. The up / down key 13 can select the ascending / descending direction, and is normally used as a key for selecting the high / low direction of the received broadcast frequency to be selected.
When the display content selection mode is switched by the operation of 2,
The level of the area name list displayed on the display screen of the display unit 10 can be selected by operating this key.

Next, FIG. 2 is an explanatory diagram showing an example of display of a regional map used in the first embodiment shown in FIG. 1 and a regional name list showing municipalities (regional names) belonging to the regional map. Here, (a) is a regional map, and (b) and (c) are regional name lists.

The area map shown in FIG. 2 (a) is
The area divided by the primary mesh (represented by a thick frame) is further divided by the secondary mesh (represented by a thin frame) into six small areas or, A), and 3 adjacent to a city
It includes a part of each of the four municipalities (these municipalities are referred to as b city, c city, and d village). Also, FIG.
The area name list shown in (b) shows a list (level B) of city / town names (area names) in one area divided by the primary mesh, each of which is different before the corresponding city / town name. The numbers are attached. further,
The area name list shown in FIG. 2C shows a list (level C) of municipality names (area names) in one area divided by the secondary mesh. Each is preceded by a different number. As mentioned above, this area name list is immediately
As a pre-stage of listing the names of cities, towns, and villages in one area, assume a regional map that covers many areas divided by the primary mesh, and list the regions in that region map (for example, northern district of e prefecture). , The eastern region of prefecture e, etc.) and / or a regional map including a plurality of regions divided by the primary mesh is assumed, and the regions listed in the regional map are listed (for example, , F city,
It is also possible to provide a list (level A ′) that has performed g cities, h groups, etc.).

This area name list used in the first embodiment is created by the following procedure. That is, for each area map specified by mesh codes different from each other, for example, the area map of a city as shown in FIG. 2A, the name of the municipality in the area map, for example, as shown in FIG. A city, b city, c city, as illustrated in (b),
It is created by listing d villages and sequentially adding different numbers, for example, 1.2.3.4 to the heads of the listed municipalities. The area name list is 1
It is created for each area divided by the secondary mesh or individually for each area divided by the secondary mesh. In addition, a number added to the beginning of the municipality name, for example, 1.2.
3.4 and the like are added to select each municipality name independently depending on the arrangement positions of a plurality of keys of the preset key 11.

The area name list is prepared in advance by the manufacturer of the FM multiplex broadcast receiver before shipment of the FM multiplex broadcast receiver, and the created area name list is stored in the internal memory 8. Alternatively, it is preferable to separately prepare an external ROM (read-only memory) instead of the internal memory 8 so that the external ROM can be used appropriately. Also, when the area name list covers all of Japan, the storage capacity of the internal memory 8 or the external ROM
Since the storage capacity of each will become enormous, it is possible to create a list of area names for each required region, for example, the Kanto region or the Tohoku region, so that they can be selected and used appropriately. preferable. Further, it is preferable that the user can also create the area name list as needed in parallel with the creation of the area name list on the manufacturer side.

Here, F of the first embodiment having the above-mentioned configuration
The operation of the M multiplex broadcast receiver will be described.

First, the reproducing operation of the broadcast signal in this FM multiplex broadcast receiver is as follows. That is, FM /
When the FM tuner 1 is set to the reception state of the FM broadcast signal frequency band and the FM multiplex broadcast signal is received by the antenna, the received FM multiplex broadcast signal is
After high frequency amplification in the AM front end 1a,
Converted to an intermediate frequency signal. Next, the intermediate frequency signal is subjected to intermediate frequency amplification and removal of noise components in the intermediate frequency circuit / demodulation circuit 1b, and then FM demodulated into a demodulated signal. Subsequently, this demodulated signal is subjected to noise elimination and demodulation into a stereo signal in the multiplexer 2, and is demodulated into the audio frequency signals of the left channel and the right channel. Then, the audio frequency signals of the left channel and the right channel are amplified in the audio signal amplifier circuit 3, respectively supplied to the left speaker 4 and the right speaker 4, and reproduced as a stereo signal. On the other hand, FM / AM
When the tuner 1 is set to the reception state of the AM broadcast signal frequency band and the AM broadcast signal is received by the antenna, the received AM broadcast signal is high-frequency amplified in the FM / AM front end 1a, Converted to an intermediate frequency signal. Next, this intermediate frequency signal is subjected to intermediate frequency amplification and removal of noise components and the like in the intermediate frequency circuit / demodulation circuit 1b, and is then AM detected 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 obtain a monaural signal. Is played.

The operation of storing the multiplex data in the internal memory 8 in the FM multiplex broadcast receiver is as follows. That is, when the FM multiplex broadcast receiver is set to receive the FM multiplex broadcast signal and the FM multiplex broadcast signal is received by the FM / AM tuner 1, the FM / A
The demodulated signal obtained at the output side of the M tuner 1 is supplied to the multiplex data demodulation circuit 5, where the FM multiplex data is reproduced and demodulated. Next, the demodulated multiplexed data is supplied to the synchronization error correction unit 6, where the multiplexed data is error-corrected. Next, the error-corrected multiplexed data is
The data is supplied to the control unit 7, where it is sorted for each data type based on the data header attached to the head of the multiplexed data. At this time, the area map information and the traffic information in the multiplex data are supplied from the control unit 7 to the internal memory 8 together with the mesh data 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 receive AM broadcast signals, the FM broadcast
Since the multiplexed data is not superposed, the control unit 7 cannot take out the multiplexed data, and the internal memory 8 does not store any data.

Next, in this FM multiplex broadcast receiver, the display operation for displaying the area map corresponding to one area selected from the area name list on the display unit 10 is performed as follows. In this case, for convenience of explanation, the user
It is assumed that a city area map, for example, an area map of the area shown in FIG. 2A is desired.

Now, when the FM multiplex broadcast receiver is switched to the display content selection mode by operating the mode selection switch 12, the area name list (level 1) corresponding to the primary mesh is displayed on the display unit 10. If the area name list displayed at this time is not what the user desires, the up / down key 13 is operated to change the display of the area name list one after another, and the area including the desired area name list and a city is displayed. Continue changing the display of this region name list until the name list is displayed. Then, as shown in FIG. 2B, when the area name list including the a city desired by the user is displayed on the display unit 10, the user selects the a city desired by the user in the area name list. The attached number 1 is selected by operating the key corresponding to the number 1 in the preset keys 11. By this selection, the control unit 7 causes the a
The mesh code corresponding to the mesh area including the city is read from the internal memory 8. After reading this mesh code, the control unit 7 compares this mesh code with the mesh code in the FM multiplex data of the FM multiplex broadcast signal received sequentially, and when these mesh codes match, the FM multiplex data The map information therein is transmitted to the display unit 10 and displayed on the display unit 10.

Further, when the user desires a regional map of e town in a city, for example, a regional map of the small area shown in FIG. 2 (a), a list of regional names including a city is displayed, where After selecting a city, the display is switched to the selection of the secondary mesh and the display of the area name list is sequentially changed again. Then, as shown in FIG. 2C, when the area name list including e towns in a city desired by the user is displayed on the display unit 10, the user selects the area name in the area name list. The number 1 attached to the desired a city and town is selected by operating the key corresponding to the number 1 in the preset keys 11. By this selection, the control unit 7 reads from the internal memory 8 the mesh code corresponding to the mesh area including the city a and town e. After reading this mesh code, the control unit 7 compares this mesh code with the mesh code in the FM multiplex data of the FM multiplex broadcast signal received sequentially, and when these mesh codes match,
The map information in the FM multiplex data is transmitted to the display unit 10 and displayed on the display unit 10.

In this case, when the user displays a desired area map on the display unit 10, the area name list including the city a is not displayed from the beginning, but the area name list of a much wider range than the city a is initially displayed. May be displayed, and then the area name list may be displayed so as to sequentially narrow down to a narrow area. That is, first, a list of areas divided into several prefectures (eg, e prefecture north, e prefecture west, etc.)
Display the list of area names that you have selected, and include a city
Select the northern part of the prefecture with the preset key 11 and then e
Procedure to display a region name list that lists regions (for example, a city, f city, g city, h group, etc.) obtained by dividing the northern part of the prefecture into several areas, and select the a city from the preset keys 11 It may be displayed by.

The case where the user displays a desired regional map on the display unit 10 has been described above.
In the FM multiplex broadcast receiver of the embodiment, when the user displays a desired regional map on the display unit 10, character information such as traffic information (road information) corresponding to the displayed regional map is displayed. It can be displayed on the display unit 10 together with the regional map or alternately with the regional map. In this case, the following two means can be considered as means for displaying the regional map and the traffic information (road information).

In the first means, the control unit 7 identifies the traffic information (road information) in the FM multiplex data of the received FM multiplex broadcast signal based on the header data, and the identified traffic information is the second one. When the user displays a desired area map on the display unit 10 by temporarily storing it in an internal memory (not shown), the second traffic information corresponding to the area map is displayed based on the mesh code. The read traffic information is transmitted to the display unit 10 and is displayed on a separate screen at the same time as the user's desired regional map, or the user alternately displays the desired regional map. . In the second means, the control unit 7 displays the area map desired by the user on the display unit 1.
When it is displayed as 0, based on the mesh code of the desired regional map, the user includes the regional traffic information corresponding to the regional map in the FM multiplex data of the FM multiplex broadcast signal received thereafter. If it is detected that the local traffic information is included, the user is notified that the local traffic information has been received by some kind of warning means, for example, a buzzer, flashing light, etc. The user can operate the display unit 10 when the alarm means operates.
Switching to the display of local traffic information makes it possible to obtain local traffic information.

As described above, according to the first embodiment, the user can immediately obtain the area map of the required area and the character information such as traffic information (road information). Do not miss or be unable to confirm text information such as maps and traffic information (road information).

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

In FIG. 3, 14 is a DTS microcomputer, 1
Reference numeral 5 denotes a second memory, and other components that are the same as those shown in FIG. 1 are designated by the same reference numerals.

In this case, the DTS microcomputer 14 uses FM /
It detects the received electric field strength of the FM multiplex broadcast signal received by the AM tuner 1, and is connected to the control unit 7 and the second memory 15, and is also connected to the FM / AM tuner 1. The second memory 15 is the DTS microcomputer 14
The received electric field strength of the FM multiplex broadcast signal detected in (3) is stored and stored.

The difference between the configuration of the second embodiment and that of the first embodiment is that the first embodiment properly selects the preset area key 11 and the up / down key 1 for selecting the area name list.
3, the second embodiment has a preset key 11 and an up / down key 13 for selecting the area name list.
Is not provided, and the second embodiment is DT
While the S microcomputer 14 and the second memory 15 are provided, the first embodiment is only that the DTS microcomputer 14 and the second memory 15 are not substantially provided. There is no structural difference between the second embodiment and the first embodiment. Therefore, further detailed description of the configuration of the second embodiment will be omitted.

The FM multiplex broadcast receiver of the second embodiment operates as follows.

First, the reproduction operation of the broadcast signal of the FM multiplex broadcast receiver of the second embodiment is the same as that of the first embodiment described above.
It is the same as the reproduction operation of the broadcast signal of the M multiplex broadcast receiver,
The operation of storing the multiplex data of the FM multiplex broadcast receiver of the second embodiment in the internal memory 8 is also the same as the operation of storing the multiplex data of the FM multiplex broadcast receiver of the first embodiment in the internal memory 8. Since the operation is almost the same, F of the second embodiment is used.
The description of the operation of reproducing the broadcast signal and the operation of storing the multiplexed data in the internal memory 8 in the M multiplex broadcast receiver will be omitted.

Next, in the FM multiplex broadcast receiver of the second embodiment, the storage and storage operation of the received electric field strength information is performed as follows. Now, when the FM multiplex broadcast receiver is set to the receiving state of the FM multiplex broadcast signal, when the FM multiplex broadcast signal is received by the FM / AM tuner 1, the FM / A
The S (signal) meter output representing the received electric field strength of the FM multiplex broadcast signal received from the M tuner 1 is supplied to the DTS microcomputer 14, and the DTS microcomputer 14 transmits this S meter output to the second memory 15 and receives it. It is stored and stored in the second memory 15 as electric field strength information. On the other hand, even when the FM multiplex broadcasting receiver is set to the AM broadcasting signal receiving state, when the FM broadcasting signal is received by the FM / AM tuner 1, the FM multiplex broadcasting received from the FM / AM tuner 1 is received. The S meter output representing the received electric field strength of the signal is supplied to the DTS microcomputer 14,
The S microcomputer 14 outputs the S meter output to the second memory 1
5, and the second memory 1 as the received electric field strength information.
Stored and stored in 5.

The operation of storing and storing the additional information (station data information) in the FM multiplex broadcast receiver of the second embodiment is as follows.
This is done as follows. As described above, the demodulated signal obtained at the output of the FM / AM tuner 1 is the multiplexed data demodulation circuit 5
The FM demodulated data is reproduced and demodulated in step (4), and the demodulated multiplexed data is subjected to error correction of the multiplexed data in the synchronization error correction unit 6. Subsequently, the error-corrected multiplexed data is supplied to the control unit 7 and is sorted according to the data type as described above.
The station data information such as the broadcasting frequency of the core station and the name of the core station is also selected, and the selected station data information is supplied from the control unit 7 to the internal memory (first internal memory) 8 and stored and stored therein. .

Here, FIG. 4 is a flow chart showing an operation process when a desired area map is displayed on the display unit 10 in the FM multiplex broadcast receiver of the second embodiment.

Based on this flowchart, the operation process until the desired area map is displayed on the display unit 10 in the FM multiplex broadcast receiver of the second embodiment will be described. However, the various operations in this flowchart are all executed by the control unit 7.

First, in step S1, FM / AM
The tuner 1 is set to the reception state of the FM multiplex broadcast signal,
Next, the channel selection device of the FM / AM tuner 1 is set to the seek start state of the FM multiplex broadcast signal.

Then, in step S2, based on the station data information stored in the internal memory 8, F
It is determined whether the FM multiplex broadcast signal received by the seek of the M multiplex broadcast signal is a broadcast signal from an FM station (for example, NHK or the like) on the nationwide net. Then, when it is determined that the broadcast signal is from the FM station of the national net (Y), the process proceeds to the next step S3, while when it is determined that it is not the broadcast signal from the FM station of the national net (N), another step is performed. Go to S4.

Next, in step S3, the broadcast frequency of the received FM multiplex broadcast signal from the FM stations of the nationwide net is newly stored in the internal memory 8.

In the following step S4, FM / AM
It is determined whether or not the seek of the FM multiplex broadcast signal from the FM stations on the nationwide network in the tuner 1 tuning device is completed. When it is determined that the seek of the FM multiplex broadcast signal is completed (Y), the process proceeds to the next step S5, while
When it is determined that the seek of the FM multiplex broadcast signal has not ended (N), the process returns to the first step S1.

Then, in step S5, it is determined whether or not there are a plurality of broadcast frequencies of FM multiplex broadcast signals from FM stations on the national net stored and stored in the internal memory 8. When it is determined that the stored and stored FM multiplex broadcast signal has a plurality of broadcast frequencies (Y), the process proceeds to the next step S6, while the stored and stored FM multiplex broadcast signal does not have a plurality of broadcast frequencies. When the determination is (N), the process proceeds to another step S7.

Then, in step S6, the received electric field strength information stored and stored in the second memory 15 is obtained for each of the plurality of FM multiplex broadcast signals from the FM stations of the nationwide network stored and stored in the internal memory 8. Based on this, the received electric field strength is ranked.

Then, in step S7, the broadcast frequency of the FM multiplex broadcast signal from the FM stations of the nationwide net having the maximum received electric field strength is specified based on the received electric field strength information stored and stored in the second memory 15. .

Next, in step S8, the mesh code corresponding to the broadcast coverage area of the FM multiplex broadcast signal from the FM stations of the nationwide net specified to have the maximum received electric field strength is read from the internal memory 8.

Then, in step S9, based on the mesh code read from the internal memory 8, the area map information corresponding to the mesh code is included in the subsequently received multiplex data of the FM multiplex broadcast signal from the FM stations of the nationwide net. Search for.

Subsequently, in step S10, it is determined whether or not the mesh code of the searched regional map information and the mesh code read from the internal memory 8 match. When it is determined that both mesh codes match (Y), the process proceeds to the next step S11, while
When it is determined that both mesh codes do not match (N), the process returns to the previous step S9.

Finally, in step S11, the searched area map information is transmitted to the display section 10, the necessary area map is displayed on the display section 10, and the series of operation processes is completed.

In step S9, at the same time as the search for the area map information is performed, the search for the area traffic information for broadcasting the area indicated by the area map information is also executed, and in step S11, The configuration may be changed such that the required regional map is displayed and the regional traffic information is displayed at the same time, or the regional map and the regional traffic information are alternately displayed.

Further, when the required area map is displayed on the display unit 10 in step S11, the traffic information corresponding to the area map is included in the multiplexed data of the FM multiplex broadcast signal received thereafter. When it is detected that the traffic is detected, the configuration may be changed to notify the user that the local traffic information has been received, by some kind of warning means, for example, a buzzer, blinking of light, or the like.

As described above, according to the second embodiment, it is possible to obtain and reliably display the regional map corresponding to the current position of the automobile, and broadcast the regional map together with the regional map. It is possible to obtain the local traffic information to be serviced and display the both in a reliable manner as well.

[0056]

As described above, according to the inventions described in claims 1 to 3, with respect to each area map designated by the mesh code in the FM multiplex data, the area belonging to each area map. The area name list representing the names is stored in the internal memory 8 in association with the mesh code, and when the user selects one area in the area name list, the mesh code related to the selected area is received. At this time, the area map specified by the mesh code is read from the internal memory 8 and is automatically displayed on the display unit 10. Therefore, the user can read the area map and road information of the necessary area. It is possible to immediately understand the character information of, and not to miss or be unable to confirm the character information such as the area map and road information of the required area. There is an effect that the waiting time for obtaining character information such as local maps and road information area can be sufficiently shorter than the known FM multiplex broadcasting receiver.

Further, according to the invention described in claims 4 to 5, for each regional map designated by the mesh code in the FM multiplex data, the broadcasting station of the FM broadcasting station of the nationwide net that broadcasts those regions. The name and broadcast frequency are stored in the first internal memory 8 in association with each mesh code, and the national net F received at the seek time of the FM broadcast signal is received.
Regarding the FM multiplex broadcast signal of the M broadcasting station, its broadcasting station name and broadcasting frequency are stored in the first internal memory 8 and its received electric field strength is stored in the second memory 15, respectively, and stored in the second memory 15. Based on the broadcasting station name and the broadcasting frequency of the FM multiplex broadcasting signal indicating the maximum electric field strength, the mesh code corresponding to the nationwide net FM broadcasting station stored in the first internal memory 8 is read, and the read mesh is read. Since the area map specified by the code is displayed on the display unit, the user can obtain the area map corresponding to the current position of the automobile and the character information such as road information without fail.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing an example of a display of a regional map used in the first embodiment shown in FIG. 1 and a regional name list showing municipalities (regional names) belonging to the regional map.

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

FIG. 4 shows an FM multiplex broadcast receiver according to a second embodiment,
It is a flowchart which shows the operation process at the time of displaying a desired area map on a display part.

[Explanation of symbols]

 1 FM / AM tuner 1a Front end (F / E) 1b Intermediate frequency circuit and demodulation circuit (IFAMP DET) 2 Multiplexer (NCMPX) 3 Audio signal amplification circuit (AMP) 4 Speaker (SP) 5 Multiplexed data demodulation circuit (L-) MSK demodulation) 6 Synchronization error correction unit 7 Control unit (CPU) 8 Internal memory (RAM) 9 Display drive unit 10 Display unit 11 Preset key 12 Mode selection switch 13 Up / Down (U / D) key 14 DTS microcomputer 15 Second memory

Claims (5)

[Claims] 1. An FM multiplex broadcast signal in which at least FM multiplex data is multiplexed is received, the FM multiplex data in the received FM multiplex broadcast signal is temporarily stored in an internal memory, and the internal memory is stored in the internal memory. In an FM multiplex broadcast receiver capable of selectively displaying a part of the stored FM multiplex data on a display unit, with respect to each area map designated by a mesh code in the FM multiplex data, the area A region name list representing the region names belonging to the map is stored in the internal memory in association with the mesh code,
When at least one area in the area name list is selected, when a mesh code having the selected area is received, area information designated by the mesh code is automatically displayed on the display unit. F characterized by
M multiplex broadcast receiver. 2. When the area information designated by the mesh code is displayed on the display unit, the traffic information in the FM multiplex broadcast signal servicing the area is read from another internal memory, and the area map is read. The FM multiplex broadcast receiver according to claim 1, wherein the FM multiplex broadcast receiver is displayed in accordance with the above. 3. When the area information designated by the mesh code is displayed on the display unit and the traffic information of the FM multiplex broadcast signal servicing the area is received, the alarm means displays the traffic information. The FM multiplex broadcast receiver according to claim 1, wherein reception is notified. 4. An FM multiplex broadcast signal in which at least FM multiplex data is multiplexed is received, and the FM multiplex data in the received FM multiplex broadcast signal is temporarily stored in a first internal memory, and In an FM multiplex broadcasting receiver capable of selectively displaying FM multiplex data on a display unit and temporarily storing the received electric field strength of a received FM multiplex broadcasting signal in a second internal memory, For each area map specified by the mesh code in the data, the broadcasting station name and broadcasting frequency of the national net FM broadcasting stations broadcasting the areas are stored in the first internal memory in association with each mesh code. Further, regarding the FM multiplex broadcast signal of the nationwide net FM broadcast station received at the time of seek of the broadcast signal, the broadcast station name and the broadcast frequency are stored in the first internal memory. The received internal field strengths are respectively stored in the second memory, and the first internal part is stored based on the broadcasting station name and the broadcasting frequency of the FM multiplex broadcast signal indicating the maximum electric field strength stored in the second memory. An FM multiplex broadcasting receiver, wherein a mesh code corresponding to the nationwide net FM broadcasting station is read out from a memory, and area information designated by the read mesh code is displayed on the display section. 5. When the area information designated by the mesh code is displayed on the display unit and the traffic information of the FM multiplex broadcast signal servicing the area is received, the alarm means displays the traffic information. The FM multiplex broadcast receiver according to claim 4, wherein reception is notified.