JP4240183B2 - Receiving machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention also relates to a receiver.
[0002]
[Prior art]
Currently, various broadcasting and communication services are being implemented throughout the country. Furthermore, digital broadcasting and ITS-related communication services have been started and are expanding.
[0003]
[Problems to be solved by the invention]
However, each broadcast may be performed only in a specific region, or the system may not be unified. For example, in mountainous areas, AM broadcasts may be received, but FM broadcasts may not be received. For this reason, even if it is intended to use various broadcasts and services by installing a receiver in a vehicle, they may not be used appropriately.
[0004]
Therefore, a receiver (reception terminal) called a software receiver has been considered. In this software receiver, the reception process is realized by a DSP and software, and the software is changed so as to be compatible with various broadcasting systems. In other words, by doing so, various broadcasts can be used simply by changing the software.
[0005]
However, in this case, when software is changed in accordance with the broadcasting system, a method of obtaining software necessary for the broadcasting system and a method of setting the software in the receiver become a problem.
[0006]
The present invention is intended to solve such problems.
[0007]
[Means for Solving the Problems]
In this invention,
A front-end circuit that is configured in an electronic tuning system, converts a received signal having a target frequency among received signals into an intermediate frequency signal, and outputs the intermediate signal;
A DSP that performs at least demodulation processing on the intermediate frequency signal output from the front end circuit by executing predetermined software;
A memory into which the software executed by the DSP is loaded;
A navigation unit that receives radio waves from a navigation satellite, detects the current position of the aircraft, and outputs position information;
An electronic map including the current position of the own device according to the position information output by the navigation unit and a display for displaying a mark indicating the own device;
Storage means having first and second databases;
A control circuit for controlling the front end circuit and the DSP according to the position information output from the navigation unit;
Have
The first database is
Multiple sets of data indicating the service area and data indicating the broadcasting system of the broadcast providing the service area
Have
The second database is
A plurality of sets of data indicating the broadcasting system and software loaded into the memory when receiving the broadcasting of the broadcasting system
Have
The control circuit is
Based on the position information output by the navigation unit, the broadcasting system for providing the current service area with reference to the first database is determined,
According to the broadcasting system of the discrimination result, the software corresponding to the broadcasting system of the discrimination result is loaded from the second database into the memory with reference to the second database,
The data loaded in this memory is supplied to the front-end circuit to set the reception frequency, and
The program loaded in the memory is supplied to the DSP and the execution contents are set.
The receiver is configured as described above.
Therefore, the program executed by the receiving circuit is changed according to the position where the broadcast is received, and the broadcast at the reception location is appropriately received.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an example in which the present invention is applied to an in-vehicle receiver. Reference numeral 10 denotes a receiving circuit configured as a software receiver.
[0009]
That is, a broadcast wave signal is received by the antenna 11, and the received signal is supplied to a front end circuit 12 configured in an electronic tuning system. Among the received signals of the antenna 11, a received signal having a target frequency is an intermediate frequency signal. Frequency conversion. This intermediate frequency signal is supplied to the A / D converter circuit 13 and A / D converted into a digital intermediate frequency signal, and this digital intermediate frequency signal is supplied to the DSP 14.
[0010]
For example, a RAM 15 is connected to the DSP 14 as a rewritable memory. The DSP 14 executes a program loaded in the RAM 15 to demodulate the digital audio signal and the digital data multiplexed from the digital intermediate frequency signal supplied thereto, and stereo demodulation, decoding, error The digital audio signal and various digital data are output by executing processing such as correction.
[0011]
Then, the digital audio signal output from the DSP 14 is supplied to the D / A converter circuit 16 and D / A converted into an analog audio signal, and this audio signal is supplied to the speaker 18 through the output amplifier 17.
[0012]
Further, digital data output from the DSP 14 is supplied to a microcomputer 21 for system control. For example, a routine 100 as shown in FIG. 2 is prepared in the microcomputer 21 as a part of a program executed by the CPU (not shown).
[0013]
This routine 100 is for setting, in the DSP 14 or the like, a program necessary for receiving the broadcast of the new service area when the broadcast service area changes due to the running of the vehicle. Although details of the routine 100 will be described later, in FIG. 2, the routine 100 shows only a portion related to the present invention.
[0014]
For example, an HDD 22 is connected to the microcomputer 21 as a storage device, and databases 200 and 300 as shown in FIG.
[0015]
In this case, the database 200 is a table showing the correspondence between the service area and the broadcast broadcasting system that provides the service area. In FIG. 3, the service areas A1 and A3 have the broadcasting system B1, The area A2 has a broadcasting system B2, the service area A4 has a broadcasting system B3, and so on. The database 300 is a table showing a correspondence relationship between a broadcasting system and software (program and data) executed by the DSP 14 to receive broadcasting of the broadcasting system . In the case of FIG. 3 , the broadcasting system B1 is a program. Is C1, the data is D1, the broadcast method B2 is the program C2, the data is D2, the broadcast method B3 is the program C2, the data is D3, and so on.
[0016]
Further, frequency data for controlling the reception frequency is supplied from the microcomputer 21 to the front end circuit 12. This frequency data is a part of the data D1, D2, D3,.
[0017]
The RAM 15 is also connected to the microcomputer 21, and various operation keys (operation switches) 24 and a display 25 are connected to the microcomputer 21.
[0018]
Furthermore, a navigation unit 30 is provided in the receiver of FIG. 1 as means for detecting the position of the own vehicle. The navigation unit 30 is a case where a DVD-ROM 31 is used as a medium having map data, and the DVD-ROM 31 stores various map data necessary for navigation. The navigation unit 30 is provided with a DVD-ROM drive device 32 for reading data from the DVD-ROM 31.
[0019]
Further, the navigation unit 30 is provided with, for example, a gyro 33 as an autonomous navigation unit, and data such as a speed at which the user moves is extracted from the gyro 33. The navigation unit 30 is also provided with a vehicle speed sensor 34 that detects the traveling speed of the vehicle, and a GPS unit 35 that receives radio waves from a navigation satellite, for example, a GPS satellite, and extracts data such as its own position. Is provided. Further, the navigation unit 30 is also provided with a microcomputer 36 for controlling the operation of the unit 30.
[0020]
In such a configuration, output signals from the gyro 33, the vehicle speed sensor 34, and the GPS unit 35 are processed by the microcomputer 36 to determine the vehicle position, and the map data including the vehicle position is read from the DVD-ROM 31. It is. The read map data is supplied to the microcomputer 21, and an electronic map centering on the vicinity of the vehicle position is displayed on the display 25, and a mark indicating the vehicle is displayed at the vehicle position. Is displayed.
[0021]
When the power of the receiving circuit 10 is turned on (or when the reception of the broadcast by the receiving circuit 10 is enabled), the CPU processing in the microcomputer 21 starts from step 101 of the routine 100, and then in step 102 , The last channel (the broadcast that was received when the power was turned off last time) is selected. The channel selection method for this last channel will be described later.
[0022]
Subsequently, in step 111, by referring to the position information obtained by the navigation unit 30, the current vehicle position, that is, the reception position of the current broadcast is different from the broadcast service area received so far. It is determined whether or not the service area has changed.
[0023]
When the service area has not changed, step 111 is repeated, but when the service area changes to a new service area (another broadcast service area) due to vehicle travel, the process proceeds from step 111 to step 112. In this step 112, by referring to the database 200, the broadcast system of the broadcast in this new service area is determined, and whether or not the DSP 15 needs a new program in order to receive the broadcast in this new service area. Determined.
[0024]
As a result of the determination process of step 112, when a new program is required, the process proceeds from step 112 to step 113. In step 113, the database 300 is referred to, and the broadcast method of the determination result of step 112 is determined. Is designated, and the designated program is loaded from the HDD 22 to the RAM 15.
[0025]
Then, in this case, the DSP 14 executes broadcast reception processing according to the program loaded in the RAM 15, so that the broadcast in the new service area can be received from the point of step 113.
[0026]
For example, when it is determined in steps 111 and 112 that the mobile station has entered a service area of AM broadcasting that broadcasts traffic information at a frequency of 1620 kHz, a program for receiving the AM broadcast is stored in the RAM 15 from the HDD 22 in step 113. Loaded. Since the program loaded in the RAM 15 is executed by the DSP 14, the AM broadcast can be received.
[0027]
Then, the process proceeds to step 114 following step 113. As a result of the determination process in step 112, when a new program is not required, the process skips step 112 to step 113 and proceeds to step 114.
[0028]
In step 114, it is determined whether or not the setting data needs to be changed when receiving the broadcast in the new service area. If the setting data needs to be changed as a result of the determination, the process proceeds from step 114 to step 115. In step 115, the database 300 is referred to correspond to the broadcasting method of the determination result in step 112. The obtained data is taken into the microcomputer 24 from the HDD 22, and the front-end circuit 12 is set according to this data.
[0029]
For example, as described above, when it is determined that an AM broadcast service area that broadcasts traffic information at a frequency of 1620 kHz has been entered and the AM broadcast can be received, the frequency of 1620 kHz is further obtained in step 115. Is supplied to the front end circuit 12 and the reception frequency is set, so that AM broadcast 1620 kHz can be received.
[0030]
Subsequently, the process proceeds from step 115 to step 116. As a result of the determination process in step 114, when new data is not required, the process skips step 114 to step 115 and proceeds to step 116.
[0031]
In step 116, the data relating to the broadcast received at this time is stored in a non-volatile memory (not shown) of the microcomputer 21 as data for selecting the last channel in step 102. Therefore, if the channel is selected in step 102 according to the data stored in step 116, the broadcast (last channel) received when the power was turned off the last time is selected.
[0032]
Then, the process returns from step 116 to step 111. Accordingly, as described above, step 111 is repeated until the service area is changed, and when the service area is changed to another service area due to vehicle travel, step 112 is performed. After that, it will be executed.
[0033]
Thus, according to the above-described receiver, when the service area changes due to vehicle travel, a program corresponding to the broadcast system of the broadcast in the new service area is executed by the DSP 14, so that the broadcast in the service area is appropriately received. can do. Therefore, even if the broadcast is performed only in a specific area and the user does not know that the broadcast is performed, the broadcast can be automatically used.
[0034]
In addition, at this time, the program executed by the DSP 14 is automatically loaded from the HDD 22 to the RAM 15 and executed in correspondence with the service area, so that it can be used even for broadcasts whose systems are not unified. . Further, the user can use it without being aware of the difference in the broadcasting system.
[0035]
The routine 100 of FIG. 4 is a case where the broadcast to be used by the user can be specified. That is, in the routine 100 of FIG. 4, step 121 is added to the routine 100 of FIG. The receiver is configured as described with reference to FIG.
[0036]
Then, the user operates the key 24 to designate a desired broadcast. Then, the data of the designated content is stored in the HDD 22, for example. Then, when the service area is changed to a new service area due to the traveling of the vehicle, the process proceeds from step 111 to step 121. In step 121, the broadcast system of the new service area is detected by referring to the database 200. Then, the broadcast broadcast system in this new service area is compared with the broadcast broadcast system designated by the user.
[0037]
When the two match, the process proceeds from step 121 to step 112, and when the two do not match, the process returns from step 121 to step 111. Therefore, when the broadcast designated by the user operates in the service area where the broadcast is broadcast, the broadcast can be automatically received.
[0038]
Thus, according to the routine 100 of FIG. 4, when the vehicle travels in the broadcast service area desired by the user, the broadcast can be automatically received.
[0039]
In each of the above cases, software corresponding to various broadcasting systems is prepared in the HDD 22, but in the receiver shown in FIG. 5, necessary software is downloaded from a site on the Internet and used. It is.
[0040]
That is, in the receiver of FIG. 5, a communication circuit (transmission / reception circuit) 41 is connected to the microcomputer 21 instead of the HDD 22 in the receiver of FIG. The communication circuit 41 is connected to the base station 51 by radio waves, and the base station 51 is connected to the Internet 52. In addition, databases 200 and 300 are prepared at the site 53 on the Internet 52.
[0041]
When the routine 100 of FIG. 2 or FIG. 4 is executed, the databases 200 and 300 prepared in the site 53 are referred to through the communication circuit 41, the base station 51, and the Internet 52, and necessary programs and data are stored. Is downloaded to the microcomputer 21. The downloaded program is further loaded into the RAM 15 and executed by the DSP 15, and the data is used for setting the reception frequency of the front end circuit 12.
[0042]
Therefore, according to this receiver, it is possible to always obtain the latest information on the broadcast being performed, and to update the program executed by the DSP 14 and the data required by the receiving circuit 10. In addition, a new broadcasting system can be supported.
[0043]
Further, any receiver can use the databases 200 and 300 of the site 53 in common. Further, it is not necessary to prepare a storage device such as the HDD 22 in the receiver.
[0048]
In the above description, when two or more broadcasting systems can be used in one place, for example, the available broadcasting systems (broadcasts) may be displayed on the display 25 so that the user can select them. .
[0049]
[List of abbreviations used in this specification]
A / D: Analog to Digital
AM: Amplitude Modulation
CPU: Central Processing Unit
D / A: Digital to Analog
DSP: Digital Signal Processor
DVD: Digital Versatile Disc
DVD-ROM: DVD Read Only Memory
FM: Frequency Modulation
GPS: Global Positioning System
HDD: Hard Disk Drive
ITS: Intelligent Transport Systems
kHz: kiloHertz
RAM: Random Access Memory
[0050]
【The invention's effect】
According to the present invention, it is possible to appropriately receive broadcasting and communication services provided in each area. Therefore, even if the broadcast is performed only in a specific area and the user does not know that the broadcast is being performed, the broadcast can be automatically used. Moreover, at this time, even a broadcast whose broadcasting system is not unified can be used. Further, the user can use it without being aware of the difference in the broadcasting system.
[0051]
Furthermore, when using the Internet, it is possible to always obtain the latest information on the broadcast being performed, and to update the data executed by the program executed by the DSP and the receiving circuit. In addition, a new broadcasting system can be supported.
[Brief description of the drawings]
FIG. 1 is a system diagram showing one embodiment of the present invention.
FIG. 2 is a flowchart showing an embodiment of the present invention.
FIG. 3 is a diagram for explaining the present invention.
FIG. 4 is a flowchart showing another embodiment of the present invention.
[5] Ru system view showing another embodiment of the present invention.

Claims (2)

A front-end circuit that is configured in an electronic tuning system, converts a reception signal having a target frequency among reception signals to an intermediate frequency signal, and outputs the intermediate frequency signal;
A DSP that performs at least demodulation processing on the intermediate frequency signal output from the front end circuit by executing predetermined software;
A memory into which the software executed by the DSP is loaded;
A navigation unit that receives radio waves from a navigation satellite, detects the current position of the aircraft, and outputs position information;
An electronic map including the current position of the own machine according to the position information output by the navigation unit and a display for displaying a mark indicating the own machine;
Storage means having first and second databases;
A control circuit for controlling the front end circuit and the DSP according to the position information output from the navigation unit;
Have
The first database is
Multiple sets of data indicating the service area and data indicating the broadcasting system of the broadcast providing the service area
Have
The second database is
A plurality of sets of data indicating the broadcasting system and software loaded into the memory when receiving the broadcasting of the broadcasting system
Have
The control circuit is
Based on the position information output by the navigation unit, the broadcasting system for providing the current service area with reference to the first database is determined,
According to the broadcasting system of the discrimination result, the software corresponding to the broadcasting system of the discrimination result is loaded from the second database into the memory with reference to the second database,
The data loaded in this memory is supplied to the front-end circuit to set the reception frequency, and
The program loaded in the memory is supplied to the DSP and the execution contents are set.
Like receiver. A front-end circuit that is configured in an electronic tuning system, converts a received signal having a target frequency among received signals into an intermediate frequency signal, and outputs the intermediate signal;
A DSP that performs at least demodulation processing on the intermediate frequency signal output from the front end circuit by executing predetermined software;
A memory into which the software executed by the DSP is loaded;
A navigation unit that receives radio waves from a navigation satellite, detects the current position of the aircraft, and outputs position information;
An electronic map including the current position of the own device according to the position information output by the navigation unit and a display for displaying a mark indicating the own device;
A communication circuit that connects to the site where the software is prepared via the Internet;
A control circuit for controlling the receiving circuit according to the position information output by the navigation unit;
Have
The control circuit is
By the position information which the navigation unit is output, and download the software for the broadcasting system to the d rear indicated by the position information service area, in the memory through the communication circuit from the site,
The data of the software downloaded to this memory is supplied to the front end circuit to set its reception frequency,
The program of the software downloaded to the memory is supplied to the DSP and the execution contents are set.
Like receiver.

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