JP3565731B2 - In-vehicle receiver - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an in-vehicle receiver mounted on a mobile body such as an automobile and capable of receiving VICS, and more particularly to a VICS data receiver using not only a radio tuner but also a television tuner.
[0002]
[Prior art]
FIG. 6 is a block diagram showing a configuration of a first vehicle-mounted receiver when a conventional VICS receiver is externally attached.
[0003]
In FIG. 6, the in-vehicle receiver capable of VICS reception includes a radio antenna 21, an antenna distributor 22, an AVN (audio / video / navigation) unit 23, a VICS receiver 24, and a television antenna 25. Have been.
[0004]
Next, the operation of the conventional example of the first configuration will be described. In FIG. 6, a high-frequency signal received by a radio antenna 21 is distributed by an antenna distributor 22 and input to an AVN integrated device 23 and a VICS receiver 24. The AVN integrated device 23 detects a radio broadcast, and the VICS receiver 24 detects VICS data. The detected data is sent to the AVN integrated device 23 to display information.
[0005]
FIG. 7 is a block diagram showing a configuration of a second in-vehicle receiver in the case where a conventional VICS receiver is incorporated.
[0006]
In FIG. 7, the on-board receiver capable of receiving VICS includes a radio antenna 1, a radio tuner 2, a VICS decoder 3, a navigation CPU 4, a drawing circuit 5, a display device 6, a television antenna 7, and an audio CPU 8. , A television tuner 9, an audio switching circuit 10, an audio amplifier circuit 11, and a speaker 12.
[0007]
Next, the operation of the conventional example of the second configuration will be described. In FIG. 7, when TV reception is selected, a TV tuner 9 and a radio tuner 2 are selected by an audio CPU 8, and a TV broadcast is received by a TV antenna 7 and then detected by the TV tuner 9 to be detected by a sound switching circuit 10 and a sound amplification circuit 11. Through the speaker 12.
[0008]
The VICS data is received by the radio antenna 1, detected by the radio tuner 2, passed through the VICS decoder 3, the navigation CPU 4, and the drawing circuit 5 and displayed on the display device 6.
[0009]
At the time of radio reception, the radio tuner 2 is selected by the audio CPU 8, and the radio broadcast is received by the radio antenna 1, detected by the radio tuner 2, outputted to the speaker 12 through the audio switching circuit 10 and the audio amplification circuit 11.
[0010]
The VICS data is displayed on the display device 6 through the VICS decoder 3, the navigation CPU 4, and the drawing circuit 5 only when NHK-FM is selected.
[0011]
[Problems to be solved by the invention]
As described above, the conventional in-vehicle receiver has a problem that VICS data cannot be received and displayed when an FM station other than the NHK-FM is selected unless two radio tuners are mounted.
[0012]
An object of the present invention is to solve the above problem and to provide an on-vehicle receiver capable of receiving and displaying VICS data even when an FM station other than NHK-FM is selected without increasing the number of radio tuners. And
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a television tuner as an in-vehicle receiver capable of VICS reception, and is configured to be able to receive VICS data using not only a radio tuner but also a television tuner.
[0014]
The present invention has the effect that VICS data can be received and displayed when an FM station other than the NHK-FM is selected without increasing the number of radio tuners by the above-described configuration.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a configuration of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an in-vehicle receiver according to an embodiment of the present invention. In FIG. 1, the on-vehicle receiver includes a radio antenna 1, a radio tuner 2, a VICS decoder 3, a navigation CPU 4, a drawing circuit 5, a display device 6, a television antenna 7, an audio CPU 8, and a television tuner 9. , An audio switching circuit 10, an audio amplification circuit 11, a speaker 12, and a detection output switching circuit 13.
[0016]
Next, the operation of the embodiment of the present invention will be described. In FIG. 1, a radio broadcast and a television broadcast are received by a radio antenna 1 and a television antenna 7, respectively, detected by a radio tuner 2 and a television tuner 9, and output to a speaker 12 through a sound switching circuit 10 and a sound amplification circuit 11. .
[0017]
The VICS data is received via the radio antenna 1 or the television antenna 2 and is detected by the radio tuner 2 or the television tuner 9. Displayed with. The control and selection of the radio tuner 2, the television tuner 9, and the detection output switching circuit 13 are performed by the audio CPU 8.
[0018]
The TV tuner 9 has an intermediate frequency band of 54 MHz to 60 MHz, and the low band (90 MHz to 108 MHz) of the VHF band is close to the FM band. Therefore, the FM band (70 MHz to 90 MHz) can be converted to an intermediate frequency of the television only by changing the channel selection data. In addition, since the TV system audio is the same as the FM modulation system, the FM broadcast can be detected by detecting with the separate carrier system. That is, the VICS data can be received by the television tuner 9.
[0019]
The control operation of the audio CPU 8 has the following variations from the first embodiment to the fourth embodiment, and controls and selects the radio tuner 2, the television tuner 9, and the detection output switching circuit 13, respectively.
[0020]
FIG. 2 is a flowchart illustrating the operation of the control unit as a reference example . When the operation for receiving the VICS data is turned on, if the radio mode is set, the television tuner starts receiving the VICS data if it is in the radio mode. If the operation is not the radio mode, the radio tuner starts receiving the VICS data.
[0021]
As described above, according to the reference example , VICS data can be received and displayed when an FM station other than the NHK-FM is selected without increasing the number of radio tuners.
[0022]
FIG. 3 is a flowchart illustrating the operation of the control unit as a reference example . When an operation for performing VICS data reception is turned on, if the radio mode is set and NHK-FM is received, reception of VICS data is started by the radio tuner. However, if the mode is the radio mode and the NHK-FM has not been received, the television tuner starts receiving VICS data.
[0023]
If the mode is not the radio mode, the radio tuner starts receiving VICS data. In this case, VICS data can be received only when NHK-FM is selected, as in the related art.
[0024]
As described above, according to the reference example , VICS data can be received and displayed when an FM station other than the NHK-FM is selected without increasing the number of radio tuners.
[0025]
FIG. 4 is a flowchart illustrating the operation of the control unit as a reference example . If the radio mode is set and the NHK-FM is not received when the operation for receiving the VICS data is turned on, the TV tuner receives and follows the VICS data. In a mode other than the radio mode or when receiving NHK-FM, VICS data is received by the radio tuner. At this time, if the reception status is not good and there is NHK-FM of another frequency, the TV tuner receives and follows the VICS data until the reception of the radio tuner becomes good.
[0026]
As described above, according to the reference example , VICS data can be received and displayed when an FM station other than the NHK-FM is selected without increasing the number of radio tuners.
[0027]
Figure 5 is a flowchart for explaining the operation of the implementation of the embodiment of the present invention. When the operation for receiving the VICS data is turned on, the television mode is set, and if the combination of the frequency and the channel does not cause the interference, the normal VICS data is received by the radio tuner. If the combination causes interference, VICS data is received by the radio tuner. The radio tuner is turned off at the same time when the VICS data is completely loaded. Thereafter, the radio tuner is turned on at regular intervals to check the reception state. If the reception is good, VICS data is received by the radio tuner, and the radio tuner is turned off simultaneously with the completion of the data fetching. Hereinafter, this is repeated to minimize the disturbance of the television broadcast by the radio.
[0028]
As described above, according to the present embodiment , VICS data can be received and displayed when an FM station other than the NHK-FM is selected without increasing the number of radio tuners.
[0029]
【The invention's effect】
As is apparent from the above description, according to the present invention, there is an effect that VICS data can be received and displayed when an FM station other than NHK-FM is selected without increasing the number of radio tuners.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an in-vehicle receiver according to an embodiment of the present invention;
FIG. 2 is a flowchart for explaining the operation of a control unit as a reference example ,
FIG. 3 is a flowchart for explaining the operation of a control unit as a reference example ;
FIG. 4 is a flowchart for explaining the operation of a control unit as a reference example ,
FIG. 5 is a flowchart for explaining the operation of the embodiment of the present invention .
FIG. 6 is a diagram showing a first configuration of a conventional vehicle-mounted receiver;
FIG. 7 is a diagram illustrating a second configuration of a conventional vehicle-mounted receiver.
[Explanation of symbols]
1, 21 radio antenna 2 radio tuner 3 VICS decoder 4 navigation CPU
5 Drawing circuit 6 Display device 7, 25 TV antenna 8 Audio CPU
9 TV tuner
10 Audio switching circuit
11 Audio amplification circuit
12 speakers
13 Detection output switching circuit
22 Antenna distributor
23 AVN integrated machine
24 VICS receiver

Claims (1)

A radio tuner for receiving and detecting a radio broadcast, a television tuner for receiving and detecting a television broadcast, a VICS decoding processing unit for decoding VICS data using a detection output of any of the radio tuner and the television tuner, A detection output switching circuit that guides a detection output of any of a radio tuner and the television tuner to the VICS decoding processing unit, and a control unit that controls the radio tuner, the television tuner, and the detection output switching circuit,
The control unit, when the frequency of the detection output from the radio tuner used by the VICS decoding processing unit and the channel of the TV tuner interfere, the VICS decoding processing unit completes the processing at the same time The radio tuner is turned off, and the radio tuner is turned on at regular intervals after the radio tuner is turned off. If the detection status of the radio tuner is good, the processing of the detection output from the radio tuner by the VICS decoding processing unit is started. An in-vehicle receiver, characterized in that:

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