JP2002314379A - On-vehicle broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finish an auto preset operation in a short time. SOLUTION: A receiving part 2 periodically searches for a frequency band used by a broadcasting station, an electric field intensity detecting part 3 detects the electric field intensities of received frequencies, and frequencies whose electric field intensities are high are sequentially stored in a first preset memory 8. When a control part 10 detects that an auto-preset button of an operating part 6 is pressed down, the control part 10 allocates each frequency to a selection button of the operating part 6 on the basis of the frequency data stored in the first preset memory 8 and stores each frequency in a second preset memory 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle broadcast receiving apparatus having an auto preset function.

[0002]

2. Description of the Related Art An auto-preset function in an on-vehicle broadcast receiving apparatus means that when an auto-preset button of the apparatus is pressed, a frequency band used by an AM broadcast station and an FM broadcast station is searched, and a broadcast station having a high reception electric field level is searched. Is automatically stored and assigned to a predetermined tuning button. By pressing the tuning button, the user can listen to the broadcast of the broadcasting station assigned to the tuning button.

[0003]

However, the auto-preset function in the above-mentioned conventional in-vehicle broadcast receiving apparatus requires about 7 to 10 seconds to complete the auto-preset operation by pressing the auto-preset button. The user sometimes felt that this time was too long. In addition, since the sound is muted during the auto-preset operation, some people do not like this.

The present invention has been made in view of such a conventional problem, and has as its object to provide an in-vehicle broadcast receiving apparatus capable of terminating an auto preset operation in a short time.

[0005]

In order to achieve the above object, an on-vehicle broadcast receiving apparatus according to the present invention is a receiving means for periodically searching a frequency band used by a broadcast station and receiving a radio wave of the broadcast station. And electric field intensity detecting means for detecting the electric field intensity of the received frequency, first storing means for sequentially storing frequencies having a high electric field intensity among the received frequencies, and an auto preset button and a tuning button. Operating means, and when an auto-preset is requested from the operating means, assigns each frequency to the tuning button based on the latest frequency data stored in the first storing means, and stores the frequency in the second storing means. And control means for storing the information in the memory. With this configuration, when the user presses the auto preset button, the control unit immediately assigns the tuning button based on the frequency data already searched and stored in the first storage unit. The auto preset operation can be completed in a short time.

Further, the on-vehicle broadcast receiving apparatus of the present invention includes a navigation device for detecting a current position of the own vehicle, and based on the detected current position of the own vehicle, determines a frequency band of a broadcasting station in the area. The search is characterized in that the frequency of the broadcasting station in that area can be automatically preset no matter where the vehicle moves.

[0007] Further, the on-vehicle broadcast receiving apparatus of the present invention is characterized in that the search is performed when the current position of the own vehicle enters an area different from the area of the previous broadcast station, When your car enters an area different from the area of the previous broadcasting station, it is necessary to update the tuning button, so
By performing searches other than regular searches,
The latest frequency data for auto preset can be obtained.

[0008] The on-vehicle broadcast receiving apparatus of the present invention performs frequency search in advance for auto-preset,
Or a means for selecting whether to search for a frequency for the first time when an auto preset button is pressed and to directly store the frequency in the second storage means,
The operation of the auto preset can be selected according to the user's preference.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of an in-vehicle broadcast receiving apparatus according to an embodiment of the present invention. In FIG. 1, an antenna 1 receives radio broadcast radio waves, and a receiving unit 2 selects and outputs a desired frequency from the received radio broadcast radio waves. The electric field strength detection unit 3 detects the electric field strength of the selected frequency. The audio signal processing unit 4 extracts an audio signal from the selected frequency and amplifies it. The speaker 5 outputs an audio signal as audio. The operation unit 6
It has an auto preset button, a channel selection button, other function buttons and operation dials. The broadcast station database 7 stores an area name, a broadcast station name in the area, and a frequency used by the broadcast station. The first preset memory 8 stores, among the frequencies received by the receiving unit 2,
The frequency of the high electric field strength detected by the electric field strength detection unit 3 is sequentially stored. The second preset memory 9 stores the correspondence between the frequency data stored in the first preset memory 8 and the assigned tuning button when the auto preset button of the operation unit 6 is pressed. Control unit 10
Is configured by a microcomputer, controls the entire apparatus, and allocates the latest frequency data stored in the first preset memory 8 to each tuning button of the operation unit 6 when the auto preset button is pressed. Note that the first preset memory 8 may be a memory built in the microcomputer. The navigation device 11 receives a radio wave from a satellite by a GPS antenna 12 and a GPS receiver 13 to improve the estimation accuracy of the current position in addition to estimating the current position by a vehicle speed sensor and a direction sensor, and displays the current position on a liquid crystal display 14. Overlaid on the map data displayed above,
The driver's position and traveling route are displayed to the driver. Also,
The navigation device 11 has a route search function, and displays an optimal route from the current position to the destination by inputting the destination.

Next, the operation of this embodiment will be described with reference to FIG. First, in the initial state of the device, the receiving unit 2 transmits the radio broadcast wave received from the antenna 1
The audio signal is tuned to the frequency selected by the tuning dial of the operation unit 6, the audio signal is extracted from the frequency by the audio signal processing unit 4, and is output from the speaker 5 as audio. On the other hand, the control unit 10 causes the receiving unit 2 to periodically search the frequency band used by the broadcasting station in the current area from the lower frequency band to the higher frequency band (step S1). The term “periodically” may be an interval of 10 seconds or an interval of 10 minutes, and can be arbitrarily set by the user from the operation unit 6. The electric field intensity level of the frequency received by the receiver 2 is detected by the electric field intensity detector 3 (step S2). If the electric field intensity is higher than a certain threshold (step S3), the frequency is set to the first preset value. It is stored in the memory 8 (step S4). Control unit 1
In step S5, the above operation is performed for all radio frequencies in the current area (step S5), and the result is stored in the first preset memory 8. Next, when the control unit 10 detects that the auto preset button of the operation unit 6 has been pressed (step S6), the control unit 10 stores the frequency data stored in the first preset memory 8 into the second preset memory 9
And assigns each of the frequencies to the channel selection button of the operation unit 6 and stores it (step S7). afterwards,
When the user presses one of the tuning buttons, the control unit 10
The receiver 2 is controlled so as to tune to the frequency assigned to the tuning button, and receives a radio broadcast of that frequency and outputs it from the speaker 5. Meanwhile, the receiving unit 2
Regularly searches for radio frequencies and places the results in the first
And updates the frequency data.

When the vehicle enters a radio broadcasting station area different from the previous radio broadcasting station area while the vehicle is traveling, the control unit 10 controls the GPS receiver 13 of the navigation device 11.
Is detected from the current position of the vehicle detected by the mobile station and the location of the broadcasting station stored in the broadcasting station database 7. When the control unit 10 detects that the vehicle has entered a radio broadcast station area different from the previous radio broadcast station area, the control unit 10 inputs an interrupt signal to the reception unit 2 and
Based on the data stored in the broadcasting station database 7, the receiving unit 2 searches the frequency band used by the broadcasting station in the new current area from the lower frequency band to the higher frequency band.
To select a frequency having a high electric field strength, and store the result in the first preset memory 8. Thereafter, in the same manner as described above, when the auto preset button of the operation unit 6 is pressed, the control unit 10 determines each frequency of the operation unit 6 based on the frequency data stored in the first preset memory 8. It is assigned to a tuning button and stored in the second preset memory 9.

As described above, according to the present embodiment, the receiving unit 2 that periodically searches the frequency band used by the broadcasting station to receive the radio wave of the broadcasting station, and detects the electric field strength of the received frequency. An electric field intensity detecting unit 3, an operation unit 6 including an auto preset button and a tuning button, a first preset memory 8 for sequentially storing frequencies having a high electric field intensity among received frequencies, and an auto preset from the operation unit 6. A control unit 10 that allocates each frequency to a tuning button of the operation unit 6 based on the frequency data stored in the first preset memory 8 and stores the frequency in the second preset memory 9 when the request is made. In the case of the auto-preset operation, the first preset memory 8 has already been searched.
Since the control unit 10 immediately assigns the channel selection button based on the frequency data stored in the automatic preset operation, the auto preset operation can be completed in a short time.

Further, the on-vehicle broadcast receiving apparatus according to the present invention includes a navigation device 11 for detecting the current position of the own vehicle. When the vehicle enters a different area, the frequency band of the broadcast station in the new area is searched, so that the frequency of the broadcast station in that area can be automatically preset no matter where the vehicle moves.

The on-vehicle broadcast receiving apparatus according to the present invention performs frequency search in advance for auto presetting,
Alternatively, the operation unit 6 may be provided with a means for searching for a frequency for the first time when the auto-preset button is pressed and selecting whether to directly store the frequency in the second preset memory 9. Can be selected according to the taste of the person.

[0015]

As described above, the in-vehicle broadcast receiving apparatus according to the present invention comprises: a receiving means for periodically searching for a frequency band used by a broadcast station to receive a radio wave of the broadcast station; An electric field intensity detecting means for detecting an electric field intensity, a first storage means for sequentially storing a frequency having a high electric field strength among the received frequencies, an operating means including an auto preset button and a tuning button, and the operating means And a control means for assigning each frequency to the tuning button based on the latest frequency data stored in the first storage means and storing the frequency in the second storage means when an auto preset request is issued from When the user presses the auto-preset button, the control means immediately selects the tuning button based on the frequency data already searched and stored in the first storage means. Ri with since the can complete the auto preset operation in a short time.

Also, the on-vehicle broadcast receiving apparatus of the present invention includes a navigation device for detecting the current position of the own vehicle. When the vehicle enters a different area, the frequency band of the broadcasting station in the new area is searched, so that the frequency of the broadcasting station in that area can be auto-preset even if the vehicle moves to any area.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an in-vehicle broadcast receiving apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an auto preset operation in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Receiving part 3 Electric field strength detecting part 4 Audio signal processing part 5 Speaker 6 Operation part 7 Broadcasting station database 8 First preset memory 9 Second preset memory 10 Control part 11 Navigation device 12 GPS antenna 13 GPS receiver 14 Liquid crystal display

Continued on the front page F term (reference) 2F029 AA02 AB01 AB07 AC02 AC04 AC14 AC18 5H180 AA01 BB04 FF04 FF05 FF22 FF25 FF33 5J103 AA11 DA44 FA03 JA09 JA12 MA02 MA09 5K061 AA09 BB01 FF13 JJ07

Claims (4)

[Claims] 1. A receiving means for periodically searching a frequency band used by a broadcasting station to receive a radio wave of the broadcasting station; an electric field intensity detecting means for detecting an electric field intensity of the received frequency; A storage means for sequentially storing frequencies having a high electric field strength, an operation means including an auto-preset button and a tuning button, and the first storage means when an auto-preset is requested from the operation means. Control means for assigning each frequency to the tuning button based on the latest frequency data stored in the means and storing it in the second storage means. 2. A system according to claim 1, further comprising a navigation device for detecting a current position of the own vehicle, and searching for a frequency band of a broadcasting station in the area based on the detected current position of the own vehicle. An in-vehicle broadcast receiving device as described in the above. 3. The in-vehicle broadcast receiving apparatus according to claim 2, wherein the search is performed when the current position of the own vehicle enters an area different from the area of the previous broadcasting station. 4. A means for selecting whether to search for a frequency in advance for auto presetting or to search for a frequency for the first time when an auto preset button is pressed and directly store the frequency in the second storage means. 4. The in-vehicle broadcast receiving device according to claim 1, wherein: