JPH10164453A - Fm multiplex broadcasting receiver, receiving method and car navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To watch the contents of vehicle information and communication system(VICS) information as needed and to prevent the VICS information from being missed by displaying the receiving state of VICS information, while superimposing it on an image such as TV broadcasting image or car navigation image. SOLUTION: A reception unit 10 selects data ϕ1b of FM multiplex broadcasting containing the VICS information, data ϕ2b of TV broadcasting or data ϕ3b from a car navigator 9 through an AV selection unit 35 and displays them on an LCD 16 of a display unti 12. Even when the FM multiplex broadcasting is not selected, a microcomputer 39 generates a signal showing the presence/ absence of FM multiplex broadcast and VICS information, while activating an FM multilex broadcasting reception system 30, multiplex detect unin 23 and VICS detected unit 26 and dispalys this signal, while superimposing it on the image from the TV broadcasting or car navigator 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to teletext and V
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM multiplex broadcast receiving apparatus and method capable of receiving ICS information, and more particularly to an FM multiplex broadcast receiving apparatus capable of displaying FM multiplex broadcast data and displaying a TV broadcast image, a car navigation image, and the like. And a receiving method.

[0002]

2. Description of the Related Art In recent years, a VIC that provides road traffic information such as traffic congestion information to individual vehicles using a mobile communication system.
S Information Communication System (VICS: Vehicle Information)
and Communication System) has started. The VICS information provided by this system is currently provided by three communication means: FM data multiplex broadcasting, optical beacon, and radio beacon. FM data multiplex broadcasting (also called FM multiplex broadcasting or multiplex broadcasting)
Is a broadcasting means used as a so-called “visible radio”, and uses a subcarrier (subcarrier: center frequency of 76 kHz) of a broadcast band (100 kHz) allocated as one channel of FM broadcasting, and is 16 kbp.
Data can be broadcast at a speed of about s (including error codes). Therefore, by using the equipment of the existing FM radio station, VICS information such as traffic congestion information can be provided wherever a car is located within a range where the radio waves of the FM broadcast can reach, thereby covering a very wide range. be able to. In addition, the user can also receive VICS information on the spot when the FM radio wave arrives. For this reason,
FM multiplex broadcasting is inferior in that the communication speed is lower than optical beacons or radio beacons, but is an excellent means of transmitting VICS information in other aspects. Therefore, it is expected to be used by many users in the future. Further, by receiving the provision of the VICS service, it is possible to add a new function of displaying real-time VICS information to a car navigation system that is becoming popular, and it will be an indispensable function in the car navigation system. is expected.

[0003] In the VICS service, information is provided by characters (level 1), and information is provided by simple figures (level 2).
And information provision using a map (level 3) is considered, and any information (hereinafter, VICS information) is converted into image information, and can be provided to the user via a display screen such as a liquid crystal display device. It has become.

[0004]

As described above, data transmitted by FM multiplex broadcasting is information displayed on a screen including VICS information. Therefore, it is possible to use a display device for television broadcasting (TV broadcasting) or a display device for car navigation and a display device for FM multiplex broadcasting.
Considering installation in a narrow space inside the car, FM
The multiplex broadcast receiver is used for car navigation systems and T
It is desirable to have a function capable of displaying image information from the V system. If image information from a plurality of sources can be selected and displayed on one display device, V
When the ICS information is unnecessary, it is possible to display an image for car navigation, or to enjoy a TV broadcast when stopped in a service area or the like. Also, some VICS information, such as traffic congestion information, whose information content does not change significantly in a short time, is rare, and once provided to the user, there is information that does not need to be displayed again for a certain period of time. In such a case, it is convenient to be able to select and display image information from a plurality of sources as described above.

On the other hand, since FM multiplex broadcasting is provided together with normal FM broadcasting from a general FM broadcasting station, even if FM broadcasting is performed, there is no multiplex broadcasting including VICS information or time is limited. Various broadcast patterns, such as providing VICS information, are conceivable. Therefore, instead of displaying multiplex broadcasting, images for car navigation and T
If the V broadcast is displayed continuously, the VICS information provided by the multiplex broadcast may be missed. On the other hand, if the multiplex broadcast is always displayed on the screen, the information for car navigation cannot be obtained, and the TV broadcast cannot be watched. In addition, VICS
Since all information is transmitted at intervals of several minutes, updated VICS information cannot be obtained immediately even if the state is switched from displaying the TV screen to receiving FM multiplex broadcasting.

Accordingly, in the present invention, an image of VICS information provided by FM multiplex broadcasting and another TICS image are provided.
An FM multiplex broadcast receiving apparatus capable of switching and displaying an image such as a V-broadcast or car navigation image on the same display screen, and missing broadcast VICS information even while watching a TV broadcast or a car navigation image. It is an object of the present invention to provide an FM multiplex broadcast receiving apparatus and a receiving method that can be viewed without being viewed. It is still another object of the present invention to provide an FM multiplex broadcast receiving apparatus capable of immediately viewing updated VICS information and FM teletext when switching from a TV broadcast or a car navigation image to an FM multiplex broadcast.

[0007]

SUMMARY OF THE INVENTION For this reason, the FM of the present invention is provided.
In the multiplex broadcast receiving apparatus, when information other than the VICS information such as a TV broadcast and a car navigation image is displayed, it is possible to display that the VICS information is being broadcast over the image. That is, the FM multiplex broadcast receiving apparatus of the present invention comprises: an FM multiplex broadcast receiving unit capable of receiving the FM multiplex broadcast; an information detecting unit capable of identifying VICS information included in the FM multiplex broadcast; Display means, first image output means capable of outputting VICS information to the image display means, and second image output means capable of outputting information other than VICS information such as a TV broadcast image or a car navigation image to the image display means And receiving display means capable of displaying the identification result of the information detecting means on the image display means so as to be superimposed on the image from the second image output means. By displaying the reception status of the VICS information over the image from the second image output means, whether or not the VICS information is broadcasted while an image other than the VICS information such as a TV broadcast image or a car navigation image is displayed. Therefore, it is possible to switch the source of the image display means to the first image output means and to see the contents of the VICS information as needed. Therefore,
Even when a screen such as a TV broadcast or a car navigation is displayed, the VICS information is not missed. For this reason,
It is possible to use one image display means by switching between an image of TV broadcast or car navigation and an image of VICS information, and it is compact and capable of displaying image information from a plurality of sources in a timely manner. A broadcast receiving device can be provided.

[0008] Further, the method for receiving an FM multiplex broadcast according to the present invention includes a multiplex broadcast display step of receiving the FM multiplex broadcast and displaying VICS information included in the FM multiplex broadcast.
VI such as TV broadcast image or car navigation image
And an image display step of displaying information other than the CS information. When VICS information is received during the image display step, the VICS information is received over the image displayed in the image display step. It is displayed that it is inside. Such a receiving method of the present invention can be provided as software stored in a storage medium such as a ROM readable by a microcomputer or the like.

The detection result of the information detecting means indicating that the VICS information is received is displayed in the image displaying step by giving the function of changing the color of the predetermined area of the image displaying means to the receiving and displaying means. The image can be displayed by changing the color of a predetermined area of the image. Further, the image display means can be provided with a function of displaying a predetermined symbol, and can be displayed by adding a predetermined symbol such as “V” to the image in the image display step. With such a display method, VI
Since the presence or absence of broadcasting of CS information can be clearly displayed to the user, there is no need to worry about missing the VICS information, and the user can enjoy TV broadcasting using the image display means with peace of mind and utilize the function of car navigation. Can be.

A multiplex broadcast detecting means for determining whether or not the FM multiplex broadcast has been received is provided, and the reception display means displays the results of the multiplex broadcast detection means and the information detection means so as to overlap the image from the second image output means. By being able to
In addition to the presence / absence of VICS information, the presence / absence of multiplex broadcasting can be displayed by a predetermined symbol such as “M” or a display method.

Further, in the FM multiplex broadcast receiving apparatus of the present invention, the FM multiplex broadcast receiving means is operated even while the TV broadcast or the car navigation screen is displayed in order to identify whether or not the VICS information is being broadcast. In the state. Therefore, the multiplex broadcast can be received and the VICS information can be output even while the TV broadcast or the car navigation image is being displayed. For this reason, the first image output means is provided with VI
By providing storage means for storing CS information,
The VICS information can be updated while a broadcast or car navigation screen is being output to the image display means. Therefore, when switching from the state of displaying the TV broadcast or the car navigation screen to the state of displaying the VICS information, the updated VICS information can be quickly displayed.

Further, there is provided a car navigation system provided with the FM multiplex broadcast receiving apparatus of the present invention and a car navigation unit capable of receiving VICS information obtained by the FM multiplex broadcast receiving apparatus and supplying a car navigation image. It is possible. The information from the current car navigation is static information as map information, whereas VI information obtained by FM multiplex broadcasting is
The CS information is dynamic road information that changes every moment. Therefore, by replacing the broadcasted VICS information with the car navigation image and displaying it, static road information and dynamic road information can be obtained, so that a smoother and more comfortable driving can be enjoyed. Further, the information provision by the map considered as the level 3 of the VICS service is information that can be used by being superimposed on the car navigation image. Therefore, the V displayed in the car navigation image
By grasping the reception status of the ICS information, the information of the car navigation image that is updated every moment can be fully utilized without missing.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a car navigation system 1 including an FM multiplex broadcast receiving unit 10 according to the present invention. The FM multiplex broadcast receiving unit 10 of the present example includes a main body 11 and a display unit 12 having a liquid crystal display device and a speaker. The main body 11 and the display unit 12 are connected by a cable 13. The main body 11 is provided with an antenna terminal 14 for connecting an antenna for receiving radio waves for TV and FM broadcasts, so that TV and FM broadcasts can be received. Further, the FM multiplex broadcast receiving unit (reception unit) 10 of the present example can receive the FM multiplex broadcast transmitted by the subcarrier together with the conventional FM broadcast, and the V included in the FM multiplex broadcast.
ICS information can also be received. A car navigation unit 9 is connected to a car navigation input 15 provided on the main body 11, and car navigation image and audio information are supplied to a receiving unit 10, and VICS information is transmitted from the receiving unit 10 to the car navigation unit. It can be supplied to the unit 9.

The receiving unit 10 of the present embodiment includes a remote controller 19
Display unit 1
Infrared interface 18 with remote control 19 on front of 2
Is provided. Further, the display unit 12 has a display lamp 17 for indicating on / off, and a liquid crystal display panel (LCD).
16 and a speaker on the back side of the LCD 16.

FIG. 2 is a block diagram showing a schematic configuration of the receiving unit 10 of the present embodiment. A diversity type antenna unit 2 can be connected to the antenna terminal 14 of the main body 11, and a high frequency signal supplied from the antenna unit 2 is supplied to the FM tuner 21.
And the TV tuner 31. Of course, FM
It is also possible to prepare separate antenna units for broadcasting and TV broadcasting. First, a signal of a desired frequency band (broadcast band) is selected by the FM tuner 21 from the high frequency signal of the FM broadcast, converted to a predetermined intermediate frequency, and output. In the receiving unit 10 of this example, a microcomputer (microcomputer) 39 that receives and processes the control signal φ10 from the infrared interface 18 performs collective management including channel selection processing. Is supplied to the control signal φ9. Further, the FM tuner 21 of the present example is compatible with FM multiplex broadcasting, and is capable of extracting a band including a subcarrier for carrying multiplexed data in addition to an audio signal. FM
Among the signals extracted by the tuner 21, the audio signal φ1a is supplied to the audio unit 7, and the audio signal is amplified by the audio amplifier for low-frequency amplification of the audio unit 7 and supplied to the speaker 8 of the display unit 12. You.

On the other hand, the signal extracted by the FM tuner 21 is also supplied to a multiplexed signal extracting filter circuit 22, and if there is multiplexed data transmitted over the subcarrier by the filter circuit 22, the data is extracted. Then, the extracted multiplexed data is demodulated by the data demodulator 24. Currently, in FM multiplex broadcasting,
LMSK (Level controlled minimum shift keyin) which is suitable for narrow band and has little effect on audio signals
g) The modulation method is adopted, and the LMSK-modulated signal is demodulated to the original data in the data demodulator 24. At this stage, the character information transmitted in the normal FM multiplex broadcast can be converted into image data that can be displayed via a drawing unit 27 described later. However, VICS
Since the information is scrambled, the receiving unit 10 of the present embodiment prepares and decodes the descrambler 25 for VICS. Then, the decoded data is converted into image data φ1b by the drawing device 27 and supplied to the AV selection unit 35. The VICS information decoded by the descrambler 25 includes information that can be reflected on the car navigation unit 9. For this reason, the output of the descrambler 25 is also connected to the interface 15 with the car navigation unit 9.

Further, the drawing device 27 of this embodiment is provided with a drawing memory 28 so that VICS information or character information supplied by FM multiplex broadcasting can be temporarily stored. The receiving unit 10 of the present embodiment can transmit the FM tuner 21, the multiplexed signal extracting filter circuit 22, the demodulator 24, and the VICS information even when the TV broadcast image or the car navigation image is selected by the AV selecting unit 35 described later. If it is included, the FM multiplex broadcast receiving system 30 including the descrambler 25 can be put into operation. In addition, the first
Since the drawing device 27 corresponding to the image output means can be set to the operating state, the multiplexed character information and V
The ICS information can be stored in the drawing memory 28.
VICS information transmitted by FM multiplex broadcasting is updated at a pitch of, for example, 5 minutes. Therefore, the receiving unit 10 of this example can accumulate the new VICS information updated at the 5-minute pitch in the drawing memory 28 even while the TV broadcast or the car navigation service is selected. Therefore, when the display source is switched from the TV broadcast or the car navigation to the FM multiplex data in the AV selection unit 35, the drawing memory 28
Can be sent to the AV selection unit 35, and the updated latest VICS information and other multiplexed data can be displayed.

If the drawing memory as in the present embodiment is not provided, when the display source is switched to the FM multiplex data by the AV selection unit 35, the FM multiplex broadcast receiving system 30 and the drawing unit 27 are turned on before drawing. Processing is started. Therefore, several minutes are wasted until the updated information is displayed. Further, when the broadcast of the VICS information is interrupted due to the switching timing, there is a case where the VICS information cannot be displayed.

Further, the filter 14 for extracting a multiplex signal from the signal of the FM tuner 21 includes a multiplex detection unit 23 capable of discriminating the presence or absence of the multiplex signal from the detection result of the multiplex signal by the filter 14 and a descrambler 25 for performing descrambling processing. A VICS information detection unit 26 that can identify that VICS information is included depending on whether or not it has started is provided. These multiple signal detection units 23
And the detection result φ6 of the VICS information detection unit 26 are supplied to the microcomputer 39. For this reason, the microcomputer 39 can determine whether the multiplex broadcast is being broadcast in the broadcast band selected by the FM tuner 21 and whether the VICS information is included in the multiplex broadcast. When determining whether or not there is VICS information, the microcomputer 39 determines whether or not the VICS information detection unit 2
6, it is possible to make a determination based on only the detection signal φ6 supplied from the VICS information detection unit 26 and the detection signal φ5 of the multiplex broadcast detection unit 23 and the VICS information detection unit 26 in order to prevent erroneous detection. The presence or absence of VICS information is determined by AND (logical product) of the detection signal φ6.

The signal from the antenna unit 2 is also supplied to the TV tuner 31 so that the TV tuner 31 can select image information and audio information of a predetermined channel specified by the control signal φ8 of the microcomputer 39. I have. The image information selected by the TV tuner 31 is further amplified through an intermediate frequency amplification (IF) circuit 32 and supplied to the AV selection unit 35 as TV broadcast image data φ2b. The audio data φ2a is supplied to the audio unit 7.

The image data φ3b for car navigation (hereinafter referred to as car navigation) supplied from the interface 15 with the car navigation unit 9 is supplied to the AV selection unit 35 like the other two image data φ1b and φ2b. The audio data for car navigation is supplied to the audio unit 7 in the same manner as the other two audio data φ1a and φ2a.

A control signal φ for selecting an output source is provided to the audio unit 7 and the AV selection unit 35.
7 are supplied from the microcomputer 39, the FM broadcast data φ1a and φ1b including the VICS information obtained by the FM multiplex broadcast, and the TV broadcast data φ2a and φ2.
2b, and further, any one of three sources of car navigation data φ3a and φ3b is selected and supplied to the speaker 8 and the LCD 16 to be provided to the user. Further, the receiving unit 10
Of course, it is possible to increase the number of input sources by providing a video interface or the like. AV selection unit 3
5 is displayed on the display unit 12.
Is supplied to a color signal demodulation unit (chroma) 36 provided in
Demodulated into R, G and B color image signals. Then, the LCD 16 is transmitted via the controller 37 for image composition.
Will be displayed.

A control signal φ4 for display control is supplied from a microcomputer 39 to the image synthesizing controller 37. The control signal φ4 includes a multiplex broadcast detection unit 23.
And the detection result of VICS information based on the detection signal φ5 of VICS information and the detection signal φ6 of the VICS information detection unit 26. When FM multiplex data such as VICS information is not displayed, the multiplex broadcasting and VICS
The presence or absence of the information is displayed on the LCD 16. Therefore, in the receiving unit 10 of the present embodiment, the microcomputer 39 has a function as a receiving and displaying means. Of course, the detection signal φ5 of the multiplex broadcast detection unit 23 and the detection signal φ6 of the VICS information detection unit 26 are directly supplied to the controller 37 for image composition, and the controller 37 determines whether there is multiplex broadcast and whether there is VICS information. It is also possible to make a judgment.

FIGS. 3 and 4 show multiplex broadcasting and VIC.
An example is shown in which the presence or absence of S information is displayed on the screen. FIG.
And FIG. 4 shows FM of VICS information and other character information.
FIG. 3 is an example of an image when information other than information transmitted by multiplex broadcasting is displayed on the LCD 16. FIG. 3 shows one screen of a TV broadcast, and FIG. 4 shows one screen of a car navigation system.
FIG. 5 is a flowchart showing an example of processing for controlling these screen displays by the microcomputer 39. The screen display will be described with reference to this flowchart. First, in step 51, the multiplex broadcast data is
Select whether to output to CD16. If multiplex broadcasting has been selected, at step 52 VICS
The information and the data transmitted by the FM multiplex broadcast of the text broadcast are displayed on the LCD 16. On the other hand, if the multiplex broadcasting is not selected, the TV 16 or the image information from the car navigation unit is displayed on the LCD 16. Switching of the source of image information for multiplex broadcasting, TV broadcasting, and car navigation can be performed by the remote controller 19 as described above.
The image information displayed on the CD 16 is selected. Of course, if a source other than TV broadcast or car navigation information is input, it is also possible to select image information from that source.

If an image other than the multiplex broadcast is selected in step 51, the image information is displayed in step 53, and further, in step 54, it is determined whether or not the multiplex broadcast is being received. Is determined by the signal φ5. When the multiplex broadcast is not received, an image of the TV broadcast or the car navigation is displayed on the screen of the LCD 16 as usual, as shown in FIGS. 3 (a) and 4 (a).

On the other hand, if it is determined in step 54 that the multiplex broadcast is being received, the VICS
The signal φ6 of the information detection unit 26 is identified. And
If the VICS information is not included in the multiplex broadcast, a display indicating that the multiplex broadcast is being performed is displayed on the LCD 1 in step 56 as shown in FIGS. 3B and 4B.
Add to screen 6. In FIG. 3B, the symbol 16a of "M" is displayed at the lower right of the screen.
In (b), a circular display 16c is added to the center right of the screen. Of course, the display system is not limited to this, and it is sufficient that the user can recognize on the screen that the multiplex broadcast is being received.

Also, in step 55, V
If it is determined that ICS information is included,
As shown in FIG. 4 (c) and FIG. 4 (c), a display indicating that VICS information is being received, which is different from the display of step 56 indicating multiplex broadcasting, is displayed at step 57 on the LCD 16
Display on the screen. In FIG. 3C, a symbol 16b of “V” is displayed at the lower right of the screen, and FIG.
In FIG. 4, the color of the circular display 16c is displayed in the center right of the screen.
The color of the display is changed from that of FIG. of course,
When VICS information is received by adding a circular display to the screen of FIG. 4B, two displays may be made, or the color of the circular display to be added may be changed. is there. As described above, the display method is not limited to these, and it is only necessary that the display system can recognize that the VICS information is received on the screen. Further, separately from the LCD 16 for displaying image information, a display indicating the presence or absence of multiplex broadcasting, the presence or absence of VICS information, etc.
Of course, it may be newly provided.

In the receiving unit 10 of this embodiment, the TV
Even when the multiplex broadcasting in which the broadcast or the car navigation is selected is not selected, the FM multiplex broadcasting receiving system 30, the multiplex broadcasting detecting unit 23 and the VICS information detecting unit 26 are put into the operating state, and the presence or absence of the multiplex broadcasting and the VICS Determines the presence or absence of information. In addition, FM
Since data transmitted by multiplex broadcasting is information updated at a pitch of several minutes, it takes time to determine the presence or absence of broadcasting based on the update status. Multiplexed teletext and V
Since the ICS information is transmitted in a time-division manner, the receiving unit of this example uses the detection result of the descrambler 16 as a VI
The determination is made by the CS information detection unit 26 so that the presence / absence of VICS information can be immediately determined. Therefore, the receiving unit 10 of the present example can quickly indicate to the user through the screen whether FM multiplex broadcasting is present and whether VICS information is present even when multiplex broadcasting is not selected,
The user can select the VICS information as needed and display it on the screen.

As described above, the receiving unit 10 of the present embodiment
A function as first image output means for displaying VICS information and other character information transmitted by FM multiplex broadcasting as an image (first image) by the drawing unit 27;
It has a function as second image output means for displaying an image of a source other than the multiplex broadcast, for example, an image (second image) from a TV broadcast or a car navigation unit,
Further, it has a function of superimposing and displaying VICS information and a signal indicating the presence or absence of multiplex broadcasting on the second image displayed by the second image output means in accordance with an instruction from the microcomputer 39. Therefore, the user can continuously grasp the presence / absence of VICS information and other multiplex broadcasts during TV broadcast and while the image of the car navigation is displayed, and the VICS information and other multiplex broadcasts are supplied. Screen is displayed from TV broadcast or car navigation when
The content can be displayed by switching to the S information.

On the other hand, if there is no function for displaying VICS information or a signal indicating the presence or absence of multiplex broadcasting, L
After switching the source of the CD 16 to the multiplex broadcasting, the FM tuner 21 is operated, and the presence or absence of the multiplex broadcasting and the V
A very laborious operation, such as checking whether ICS information is included, is required. However, by employing the receiving unit 10 of this example, the user can
Since it is always possible to know whether or not ICS information is being broadcast, it is possible to reliably acquire VICS information as needed. Therefore, when VICS information is unnecessary, it is possible to enjoy a TV broadcast with ease and enjoy a drive based on information from a car navigation unit. As described above, the receiving unit 10 of the present embodiment is configured to switch and display image information from a plurality of sources on one LCD 16.
Since the presence / absence of M multiplex broadcasting can always be recognized, it is possible to reliably acquire the contents of VICS information when it is needed without providing an LCD dedicated to VICS information. Therefore, the receiving unit of this example is a low-cost and compact receiving system in which one screen display device is assigned to a plurality of pieces of image information, but has a very convenient function of not missing important information such as VICS information. It is a receiving unit provided. In the receiving unit 10 of this example, a text broadcast supplied by FM multiplex broadcasting can be displayed in addition to the VICS information.
It is also possible to identify the presence or absence of FM multiplex broadcasting.
It is also possible to display only ICS information.

Further, the VICS information or teletext multiplexed data broadcast by the subcarrier is data updated at a pitch of several minutes. Therefore, if the FM tuner 21 is put into the operating state when the VICS information is desired, the latest updated information is not immediately displayed on the LCD 16 via the drawing unit 27 as described above.
On the other hand, in the receiving unit 10 of this example, the FM
The multiplex broadcast receiving system 30 including the tuner 21 and the drawing unit 27 are in operation, and the drawing unit 27 is provided with a drawing memory 28. For this reason, while the TV broadcast and the car navigation information are displayed, the multiplex broadcast V
The contents of the broadcast such as ICS information are stored in the drawing memory 28 in an updated state. Therefore, FM
When the multiplex broadcast is selected, the image information stored in the drawing memory 28 is displayed on the LCD 16, so that the updated information can be immediately provided to the user.

In the receiving unit 10 of the present embodiment, the VICS information updated at a several-minute pitch is compared with the contents before the update stored in the drawing memory 28, and the broadcasted VICS information is compared.
LCD indicates that the content of ICS information has changed substantially
It is also possible to add a function of displaying on a screen.

Further, while the TV broadcast and the car navigation information are displayed, the multiplexed broadcast receiving system 30 including the FM tuner 21 is operated on the back side, so that the data transmitted as the VICS information can be obtained. Can be supplied to the car navigation unit 9 without delay. Further, in this example, the current VICS service including traffic congestion information and the like as VICS information transmitted together with text broadcasting in FM multiplex broadcasting is described as an example, but the information included in the VICS information is not limited to this. Without
For example, VICS information can be used in a variety of ways, such as providing updated map information for each region to a car navigation system as VICS information, or providing difference data for performing DGPS (relative positioning method). It is considered. In such a communication type car navigation system, it is important to continuously acquire VICS information. By displaying the reception status on the car navigation screen as in this example, it is possible for the user to confirm whether or not VICS information is continuously received. So, for example,
If the radio wave of the FM broadcasting station becomes weak and the VICS information cannot be received, the other broadcasting station is immediately selected, or if the FM broadcasting station stops transmitting the VICS information for some reason, the other broadcasting station is stopped. Since processing such as searching for an FM broadcast station can be performed quickly, the function of car navigation can be fully exhibited.

[0034]

As described above, according to the FM multiplex broadcast receiving apparatus and the receiving method of the present invention, the first image output means capable of displaying the VICS information transmitted by the FM multiplex broadcast as an image, the VICS information Non-images,
For example, using a second image output means for displaying an image from a TV broadcast or a car navigation unit, VICS is added to the second image displayed by the second image output means.
Information and signals indicating the presence or absence of multiplex broadcasting can be superimposed. Therefore, the user can continuously grasp the presence / absence of VICS information and other multiplex broadcasts during TV broadcast and while the image of the car navigation is displayed, and the VICS information and other multiplex broadcasts are supplied. The screen display can be switched from TV broadcast or car navigation to VICS information while the content is displayed. For this reason, it is possible to accurately supply VICS information to the user by using a receiving device to which a smaller number of display means such as LCDs are assigned for a plurality of image information sources including FM multiplex broadcasting. . Further, by employing the receiving apparatus and the receiving method of the present invention, the user can surely receive VICS information provided by FM multiplex broadcasting even while driving while watching a car navigation screen while enjoying a TV broadcast. be able to.

Further, the display indicating the presence / absence of VICS information in the receiving apparatus and receiving method of the present invention will be referred to as FM
The present invention is suitable for a car navigation system in which updated information for car navigation is supplied by VICS information broadcast using multiplex broadcasting, and a user checks the reception status of VICS information while looking at a car navigation screen, and You can enjoy a comfortable drive.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a car navigation system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a schematic configuration of a receiving unit illustrated in FIG. 1;

FIG. 3 is a diagram illustrating an example in which a receiving state is displayed by the receiving unit illustrated in FIG. 2;

FIG. 4 is a diagram showing a display example different from FIG. 3;

FIG. 5 is a flowchart showing a process of displaying a reception state by the reception unit shown in FIG. 2;

[Explanation of symbols]

 1. Car navigation system 2. Antenna unit 7. Audio unit 8. Speaker 9. Car navigation unit 10. Receiving unit 11. Receiving unit body 12. Receiving unit display unit 13. Connection cable 14. Antenna terminal 15. Car navigation terminal 16. LCD 17. On / off display 18. Infrared ray interface 19. Remote controller 21 FM tuner 22 FM multiplex data extraction filter 23 Multi-broadcast detection Unit 24 demodulator 25 VICS information descrambler 26 VICS information detection unit 27 drawing unit 28 drawing memory 30 FM multiplex broadcast receiving system 31 TV tuner 32 intermediate frequency amplification ( IF) circuit 35 AV -Option unit 36 ... color signal demodulator 37 ... image synthesis controller 39 ... microcomputer

Claims (8)

[Claims] 1. An FM multiplex broadcast receiving means capable of receiving an FM multiplex broadcast, an information detecting means capable of identifying VICS information included in the FM multiplex broadcast, an image display means capable of displaying an image, and the VICS First information capable of outputting information to the image display means;
An image output means, a second image output means capable of outputting information different from the VICS information to the image display means, and an identification result of the information detection means superimposed on an image from the second image output means. An FM multiplex broadcast receiving apparatus comprising: a reception display unit capable of displaying on the image display unit. 2. The image processing device according to claim 1, wherein the reception display unit changes a color of a predetermined area of the image display unit based on an identification result of the information detection unit, or displays a predetermined symbol on the image display unit. An FM multiplex broadcast receiving apparatus comprising at least one of the following functions: 3. The apparatus according to claim 1, further comprising: a multiplex broadcast detecting means for determining whether or not the FM multiplex broadcast has been received, wherein the reception display means displays a result of the multiplex broadcast detection means and the information detection means in the second information. 2. An FM multiplex broadcast receiving apparatus capable of displaying an image superimposed on an image from an image output means. 4. The FM multiplex broadcast receiving apparatus according to claim 1, wherein said first image output means includes a storage means for storing said VICS information. 5. A multiplex broadcast display step of receiving an FM multiplex broadcast and displaying VICS information included in the FM multiplex broadcast, and an image display step of displaying information other than the VICS information. A receiving / displaying step of displaying that the VICS information is being received, superimposed on the image displayed in the image displaying step, when the VICS information is being received during the image displaying step. Receiving method of FM multiplex broadcasting. 6. The FM multiplex broadcast receiving method according to claim 5, wherein in the receiving and displaying step, a color of a predetermined area of the image is changed or a predetermined symbol is added to the image. 7. The method for receiving an FM multiplex broadcast according to claim 5, wherein in the receiving and displaying step, a different display is provided when the VICS information is included in the FM multiplex broadcast and when VICS information is not included. . 8. The F according to claim 1, wherein
A car navigation system comprising: an M multiplex broadcast receiving device; and a car navigation unit that can receive the VICS information and supply a car navigation image to the second image output unit.