JPH10300485A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide various pieces of traffic information by use of one kind of receiver by supplying and displaying the self-position information and map information from a navigation equipment and the traffic information from a receiver onto an indicator. SOLUTION: The position detecting means 11A of a control device 11 generates self-position information by the operation of the control device 11 from the radio wave received by a receiving antenna 1 on the basis of the position information of a broadcasting station obtained by a DAB receiver 10. On the basis of the control by the control device 11, the map information from a CD-ROM reproducing unit is displayed on an indicator 13. A traffic jam state is displayed in the map information with a different color on the basis of the traffic information from the DAB receiver 10. The map information is superposingly displayed on the indicator 13 by use of the self-position information from a navigation equipment 15, or the self-position information from the position detecting means 11A, or the combined use of the both. The distance from the present position to a designation is also calculated and displayed. Further, the traffic jam state by the DAB receiver 10 is displayed as static image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a navigation device.

[0002]

2. Description of the Related Art In a conventional navigation device, a GPS is used.
Using a receiver and a CD-ROM reading device,
The map information is read out by the ROM readout device and displayed on the display, and the GPS receiver detects its own position, that is, the position of, for example, an automobile on which the navigation device is mounted, and determines the position. The mark to be displayed is superimposed on the map displayed on the display.

[0003] In addition, since information such as the degree of congestion on the road is broadcast by a road traffic information system called VICS or ATIS, the navigation apparatus is provided with a receiver for these broadcasts and receives the broadcast. On the basis of the information, for example, the degree of congestion of the road can be identified by color by superimposing the map information on the display.

[0004]

Such a conventional navigation device has the following disadvantages. In order to obtain various types of traffic information, various types of receivers are required. Since the position information of the vehicle is obtained from the GPS receiver, when the radio wave from the satellite cannot be obtained, for example, when the car is traveling in a tunnel, the position of the vehicle must be accurately detected. Can not. Since the map information generator is constituted by a CD-ROM reading device, there is a drawback that unless the CD-ROM is replaced, the latest map information cannot be obtained or the map information collected by the user cannot be utilized. . Further, when an electronic device of a different standard is connected to form a navigation device, there is a drawback that connection between the electronic devices is difficult.

[0005] In view of the above, the present invention is to propose a navigation device capable of obtaining various types of traffic information with one type of receiver.

Another object of the present invention is to propose a navigation device capable of compensating for the case where position information of the GPS receiver cannot be obtained from the GPS receiver.

Another object of the present invention is to propose a navigation device that can easily utilize the latest map information and map information collected by the user.

Another object of the present invention is to propose a navigation device which can easily connect electronic devices of different standards.

[0009]

According to the present invention, there is provided a navigation apparatus including a navigation device including a GPS receiver for generating position information and a map information generator, a display, and a plurality of carriers whose frequency components are orthogonal to each other. A time synchronization signal generating means for supplying a digital orthogonal frequency division multiplexed modulated signal obtained by modulating an information signal by using an automatic frequency control means for supplying a digital orthogonal frequency division multiplexed modulated signal; Fast Fourier transform means to which the orthogonal frequency division multiplexed modulated signal automatically controlled by the control means and the time synchronizing signal from the time synchronizing signal generating means are supplied, and a digital information signal is obtained from the fast Fourier transform means. With demodulation device, navigation device, display device, and control device for controlling the receiver The a, the indicator is obtained by the position information and the map information of its own from the navigation device, and the traffic information from the receiver to be displayed and supplies.

According to the present invention, the control device controls the navigation device, the display device, and the receiver,
The position information and map information from the navigation device and the traffic information from the receiver are supplied and displayed on the display.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described in detail with reference to FIG. 16 is a known IEEE1
394 high-performance serial bus (described later)
The electronic devices to be described later are connected to each other via the bus 16. Reference numeral 11 denotes a control device including a CPU, which controls each electronic device connected to the control device 11 via the bus 16. The control device 11 includes a position detecting means 11A (described later) for detecting its own position.

Reference numeral 15 denotes a navigation device, and 15A denotes a receiving antenna of the GPS receiver. The configuration of the navigation device 15 will be described later with reference to FIG.

Reference numeral 14 denotes a car AV device, including all or a part of a radio receiver, a television receiver, an audio cassette tape reproducing (or recording / reproducing) device, a video cassette tape reproducing (or recording / reproducing) device, and 14A. A receiving antenna of a radio receiver and / or a television receiver.

13 is an LCD (Liquid Crystal Display), PDP
A display comprising a (plasma display), a CRT (cathode ray tube), etc., displays information from various electronic devices connected to the bus 16 under the control of the control device 11. Reference numeral 12 denotes an auxiliary storage device such as an optical disk, a magnetic tape, a magnetic disk, or a semiconductor memory. Under the control of the control device 11, new map information and map information collected by the user (the location of a new store, Routes to visit, etc.)
Further, such information can be read out and displayed on the display 13.

Next, the configuration of a DAB (Digital Audio Broadcasting) receiver 10 will be described. The received signal from the receiving antenna 1 is RF (high frequency)
The amplifier 2 is supplied to an amplifier / frequency converter / IF (intermediate frequency) amplifier 2 to be respectively amplified in high frequency, further frequency-converted, and then amplified in intermediate frequency to obtain a baseband OFDM (Orthogonal Freqency Division Mutip).
lex: orthogonal frequency division multiplexing).
The FDM modulated signal is supplied to the A / D converter 3 and converted into digital data.
The signal is supplied to the / Q demodulator 4 and demodulated to obtain real part data and imaginary part data.

The real-time part data and the imaginary part data of the time series from the digital I / Q demodulator 4 are supplied to a fast Fourier transform circuit 5 and converted into the real part data and the imaginary part data of the frequency series. The real part data and the imaginary part data of the frequency sequence from the fast Fourier transform circuit 5 are supplied to a data decoder 6 and decoded, and the decoded data is output to an output terminal 7. The data decoder 6 includes a frequency deinterleave circuit, a time deinterleave circuit, and an error correction circuit that are sequentially connected in cascade.

The real part data and the imaginary part data from the digital I / Q demodulator 4 are supplied to a synchronization generation circuit 8 from which a time synchronization signal is obtained. The time synchronizing signal is supplied to the fast Fourier transform circuit 5 to control the timing of the fast Fourier transform, and is also supplied to the data decoder 6 to control the synchronization of each circuit.

Reference numeral 9 denotes a control device for controlling devices or circuits 2 to 6.

The DAB signal is currently in mode 1,
Two, three and four signals are known. In the DAB signal, T (= 1 / 2.048 MHz = 0.00) is used as a basic cycle.
048828 msec). Here, the DAB signal of mode 1 is shown in FIG. 2 as a representative. In FIG. 2, the basic period T and time are shown together. One frame of the DAB signal in mode 1 has 196608T (= 96 m).
sec) with a duration of 2656T (= 1.297 msec)
)) And one null symbol (symbol number l = 0);
The subsequent durations are both 2552T (= 1.246m)
sec) 76 symbols (symbol numbers l = 1 to 7)
6).

The symbols with symbol numbers l = 1 to 76 are
The duration of the first part is 504T (= 24
6 .mu.sec) and an effective symbol having a duration of 2048 T (= 1 msec). The effective symbol of each symbol having the symbol number 1 = 1 to 76 includes k = 1536 multicarriers having different frequencies. The carrier indicated by 0 is the carrier of the center frequency (the period of the carrier is T), the carrier indicated by 1536/2 (= 766) is the carrier of the highest frequency, and -1536/2 (= -7).
The carrier indicated by 66) is the carrier of the lowest frequency. The data amount of one symbol is 1536 waves, and the data amount is 1536 × 2 bits, 48 CU (capacity unit) × 64 bits.

The entirety of the symbols with symbol numbers l = 1 to 76 are called OFDM (Orthogonal Frequency Division Multiplex: Orthogonal Frequency Division Multiplex) symbols.

For example, taking the case of mode 1 as an example, the null symbol with symbol number l = 0 and the symbol with I = 1 are called TFPR symbols (time-frequency phase reference symbols), respectively. , Is called a synchronization channel (synchronization channel). The symbol numbers l = 2 to 4 are called FIC {fast (high-speed) information channel}, and FIC
The whole is divided into 12 FIBs (fast information blocks). Remaining symbol number l = 5-7
6 is 4 CIFs (Common Interleaved Frame)
Is divided into what is called.

The duration of each symbol of the DAB signal differs depending on the mode. The duration of each symbol in mode 2 is 1/4 of the duration of each symbol in mode 1,
The duration of each symbol in mode 3 is 1/8 of the duration of each symbol in mode 1, and the duration of each symbol in mode 4 is 1/2 of the duration of each symbol in mode 1.

That is, in the mode 1, the duration of the symbol excluding the null symbol is 2552T (=
1.246 msec), but in mode 2, 638T
(= 2552T / 4) ｛= 312 μsec (= 1.246)
msec / 4)｝, 319T (= 2552T) in mode 3
/ 8) ｛= 156 μsec (= 1.246 msec /
8)｝, 1276T (= 2552T / 2) in mode 4
{= 623 μsec (= 1.246 msec / 2)}.

The duration τ / n of an effective symbol in a symbol excluding a null symbol is 2048 T (= 1 msec) in mode 1 and 512 T in mode 2 as described above.
(= 2048T / 4) ｛= 250 μsec (= 1 msec /
4)｝, 256T (= 2048T / 8) in mode 3
｛= 125 μsec (= 1 msec / 8)｝, 1024T (= 2048/2) ｛= 500 μsec (1 m in mode 4)
sec / 2)｝.

Further, the guard interval time in a symbol excluding the null symbol is 504T (=
246 μsec), 126 T (= 504 T /
4) {= 61.5 μsec (= 246 μsec / 4)}, 63T (= 504T / 8)} = 30.75 μ in mode 3
sec (= 246 μsec / 8)｝, 252T in mode 4
(= 504T / 2) ｛= 123 μsec (= 246 μsec)
/ 2)｝.

FIG. 3 shows a summary of the configuration of the frame shown in FIG. FIG. 3 will be described briefly. A transmission frame (transmission frame) of DAB (Digital Audio Broadcasting) will be described. The transmission frame includes a SYNCC (synchronization channel), a FIC (fast information channel), and an MSC (main service channel). MSC (Main Service Channel) is time-interleaved and FIC
(Fast Information Channel) is not time interleaved.

An FIC (fast information channel) is composed of a plurality of FIBs (fast information blocks). The MSC (main service channel) is composed of a plurality of CIFs (common interleaved frames).

The FIC (fast information channel) includes a code called a program type, which indicates the type of program, and is used for quick reception by a DAB receiver.

The MSC (Main Service Channel) is
Includes various audio and various data.

Next, the configuration of the FIB (fast information block) of FIG. 3 will be described with reference to FIG. One FIB consists of 256 bits, of which 240 bits (= 30 bytes) are assigned to a FIB data field and the remaining 16 bits are assigned to a CRC (Cyclic Redundancy Check) code for the FIB data field.

The FIB data field has the format of FIG.
(Fast Information Group) v, ......
..,...,...,..., And is composed of a valid data field of 1 byte or more, in this case, 29 bytes, an end marker (having a header field but not having a FIG data field), and padding.

The FIG (fast information group) k is an FIG type consisting of 3 bits b7... B5 and a length (Length) consisting of 5 bits b4.
And a FIG data field.

Next, the structure of the FIG. 0 data field will be described with reference to FIG. The FIG type 0 data field includes a FIG header and a FIG data field. The FIG header is composed of a 3-bit FIG type (000) and a 5-bit length. The FIG data field is 1 bit b
7 C / N {current (current) / next (next)} flag (0 indicates the current state, 1 indicates the next state, respectively), 1 bit b6 OE (other ensemble) flag (0 When this ensemble is 1, when 1 is another ensemble), P / D of 1 bit b7 (service identifier is 16
Bit format or 32-bit format) Flabs (16-bit service identifier when 0, 32-bit service identifier when 1) and 5-bit b4 ... b0 extension
(Extension) and a type 0 field.

Next, the structure of the data field of FIG type 5 will be described with reference to FIG. The data field of FIG type 5 includes a FIG header and a FIG data field. The FIG header is composed of a 3-bit FIG type (101) and a 5-bit length. Each of the FIG data fields is 1
Flags defining individual extensions of bits b7 and b6, TCid of 3 bits b5... B3 {Type Component Identifier (identifying eight different service elements held using the same extension number) ) And 3 bits b2... B0 Extension
And a type 5 field.

Next, referring to FIG. 7, the TII database @ transmitter identification information
mation) The configuration of｝ will be explained. The TII database is
Transmitted in the field of the extension 22 of FIG.
IIv... TIIk... TIIt, where TIIk has a main identifier (M / S = 0) and a sub-identifier (M / S = 1). The DAB transmitter uses a plurality of transmitters for one frequency. At this time, the transmitter identifier for identifying the transmitter from which the radio wave came is TI.
I.

In the mode II, the TII is transmitted once every two frames (one frame is 96 msec) by being carried on a null symbol (the first symbol of a synchronization channel, which is originally a no-signal portion). You. The TII database provides information for using TII,
It is transmitted by the FIG. Specifically, T
For each of the II identifiers (there are a main identifier and a sub-identifier), the main identifier carries the latitude and longitude, and the sub-identifier carries the time delay of the main identifier as data. The receiver is TII
You can calculate your position using the TII database.

In the case of the main identifier, the M / S of one bit b7,
7-bit b6... B0 main identifier, 16-bit b1
5 ... Latitude Coarse of b0, with + sign at north latitude and-sign at south latitude, 90 ° is 2 ¹⁵
), 16 bits b15 ... b0 Coarse longitude ｛(Longitude Coarse), + for east longitude,-for west longitude
And 180 ° is represented by 2 ^15. {4 bits b7... B4 precision latitude} (Latitude Fine) + for north latitude,-for south latitude, 90 ° is 2精 represented by ¹⁹ and the precision longitude of 4 bits b3 ... b0 (Longitude
In Fine), when the longitude +, when the west - code is assigned to, and a} 180 ° is represented by 2 ^19.

In the case of the sub-identifier, M / S of 1 bit b7,
7-bit b6 main identifier of b0, 5-bit b7
... Rfu of b3 (spare field), 3 bits b2 ...
NSu of b0 (number of fields of sub-identifier), each 4
8-bit sub-identifier 1... Sub-identifier k... Sub-identifier n.

The sub-identifier k has 5 bits b15... B11
Sub-identifier, 11-bit delay time (Time Dley) (μse
c), 16 bits b15... b0 offset latitude (Ltitude Offset) (increase / decrease from reference latitude (90 °)
There is represented by 2 ¹⁹⁾ and 16-bit offset longitude (L
Ongitude Offset) composed of (increment or decrement from the reference longitude (180 ° is represented by 2 ^19).

Next, the structure of a TMC (traffic information channel) field will be described with reference to FIG. The TMC field is an extension 1 of the type 5 field.
Bit TMC information (Message) 1... TMC information k... And padding. TMC is machine-readable traffic information transmitted in FIG.

Next, a specific configuration example of the navigation device 15 in FIG. 1 will be described with reference to FIG.
First, the configuration of the GPS receiver 21 will be described. By the way, G
PS is formally called NAVSTAR / GPS, which is the NAVIigation System with Time And Rang-ing / Groba
l Positioning System is an abbreviation consisting of uppercase letters after the slash. 15A is GPS
An antenna for receiving radio waves from a satellite, for example, a microstrip antenna is used. A received signal (spread spectrum signal) of 1.2 GHz or 1.5 GHz received by the antenna 15A is supplied to the high frequency unit 22 through a coaxial cable, and is frequency-converted into a low-frequency intermediate frequency signal. The intermediate frequency signal is supplied to the signal processing unit 23 and subjected to spectrum despreading to obtain a message signal and a pseudo distance signal.

In the signal processing unit 23, an intermediate frequency signal based on a received signal from a GPS satellite and a PRN generated inside
Synchronizing with the code, the pseudo distance is calculated. The message signal and the pseudo distance signal are supplied to the microcomputer unit 24 to perform an operation for obtaining the current position of the moving body, thereby outputting position data (including data such as latitude, longitude, altitude, direction, speed, etc.). ) Is obtained. The microcomputer unit 24 determines a GPS satellite that can receive a radio wave at that time from a time signal from a clock circuit 25 attached thereto and almanac (calendar) data from the GPS satellite, and performs code control based on this. The signal is supplied to the signal processing unit 23 to generate a PRN code of a GPS satellite capable of receiving the radio wave.

The position data output obtained from the microcomputer section 24 is supplied to the bus 16 through the microcomputer section 27. Reference numeral 26 denotes a distance sensor which detects the driving distance of the vehicle by detecting the rotation of driving wheels, for example, rear wheels, of the four wheels of the vehicle.

Reference numeral 28 denotes a CD-RO as a map information generator
A microcomputer unit 27 (this is controlled by a microcomputer of the control device 11)
, The map information is reproduced from the CD-ROM in which the map information is recorded, and the reproduced map information is supplied to the display 13 via the bus 16.

The map information generator may be an IC card reader.

CD-ROM playback device 28 and display 13
Is controlled by the control device 11, and data on the position and traveling direction of the vehicle obtained from the microcomputer unit 27 is supplied to the display 13, and, for example, an arrow is displayed on the map displayed on the display 13. Will be displayed as

Next, an outline of an IEEE 1394 high performance serial bus (hereinafter simply referred to as an IEEE 1394 bus) will be described with reference to the magazine "Interface" Apr. 1996. The IEEE 1394 bus is a highly versatile serial bus that enables high-speed data transmission and real-time transfer, and also enables high reliability, durability, and miniaturization of network operation. The IEEE 1394 bus was officially certified at the end of 1995 as IEEE 1394-1995.

In the IEEE 1394 bus standard, 100
Mbps (exactly 98.304 Mbps), 200M
bps (exactly 196.608 Mbps), 400M
A data transfer rate in bps (accurately 393.216 Mbps) is specified, and 139 having a higher transfer rate is specified.
The four ports are defined so as to maintain compatibility with the lower speed. This realizes connection of a plurality of different communication speed devices. That is, the standard 100 Mbp
s, 200 Mbps, and 400 Mbps data transfer rates can be connected on the same network.

Further, in the IEEE 1394 bus, DS-
By using the transfer format of the Link encoding method (described later with reference to FIG. 11), compared with the 8B10B conversion of a general serial transfer format (a method in which a start bit or a stop bit is converted into 8 bits of data), the data transmission time is reduced. The overhead is reduced and the transfer bandwidth is made more efficient.

The IEEE 1394 bus has a very simple, flexible, and inexpensive cable structure in order to make it easier to use a high-speed serial bus.
Next, a cross-sectional structure of the IEEE 1394 bus cable will be described with reference to FIG. Two pairs of twisted pair signal lines S covered with signal line shields S1 and S2, respectively.
1 and S2 (which can be driven by a differential signal having a small amplitude) and a pair of power supply lines C3 and C
4 is covered with a shield S3 of the entire cable, and the periphery of the shield S3 is covered with a protective insulating coating M.

As a result, the IEEE1394 bus cable does not require a wide parallel SCSI (small computer system interface) connector or a multi-core cable, and a low-cost cable and connector can be used. Cost can be reduced.

The transfer data is, as shown in FIG.
The data is converted into two signals of 1A data and the strobe of FIG. 11B. Then, the clock of FIG. 11C is formed by the exclusive OR of the data and the strobe.

As the connection method of the IEEE 1394 bus, two types, a daisy chain and a node branch, can be used. In the daisy chain system, devices having a maximum of 16 nodes can be connected, and the maximum length between the nodes is 4.5 m.

With node branching, up to 63 units (physical node addresses) can be connected. The limitation of the number of connections in the daisy chain system comes from the transmission delay between both end nodes.

The connection and disconnection of the IEEE 1394 bus can be performed in a hot state, that is, in a state where the power is turned on and the device is operating. When a node is added or deleted, the IEEE 1394 bus network is automatically connected. Is performed. At this time, the device of the connected node can be automatically recognized, and the connected ID and arrangement are managed on the interface. This frees you from the hassle of connection procedures, etc.
It does not require a terminator like SI.

Next, the position detecting means 11A of the control device 11
Will be described. Position detecting means 11A of control device 11
Is based on the position information (latitude and longitude) of the transmitter (broadcasting station) obtained from the DAB receiver 10 (FIG. 7), based on the arrival direction and arrival time of the radio wave received by the receiving antenna 1. The position information (latitude and longitude) is calculated by the computer of the control device 11.

Next, the operation of the navigation device shown in FIG. 1 will be described with reference to FIG. FIG. 12 shows the display 1
3 shows an example of color display. Under the control of the control device 11, map information of a certain area from the CD-ROM reproducing device 28 is displayed on the display unit 13. In the map information, the thick lines, the thick lines, the thin lines, and the broken lines indicate roads, and the thick lines, the thick lines, and the thin lines indicate traffic information from the DAB receiver 10 (FIG. 8).
, A large congested road, a medium congested road, and a small congested road, respectively, and a broken line indicates a road that does not indicate a congested state.
The very thick line, the thick line, the thin line, and the broken line are actually displayed in different colors distinguishable from each other. AB, CD, EF, G
H indicates a place name, and is actually shown in kanji. D
R is an azimuth display, RS is a scale display, and these are based on the map information and the control of the display angle, display enlargement ratio, and the like by the control device 11.

Of the displays on the display 11, those in which the arrows are circled indicate the position and the traveling direction of the self (car equipped with the navigation device) on the map, and are indicated by the extension of the circled arrows. Bold dashed lines indicate the predicted roads to travel, which may be their own position information (latitude and longitude) from the navigation device 15 or the position detection means 11.
The location information (latitude and longitude) from A or a combination of both location information is displayed on the display unit 13 so as to be superimposed on the map information. In addition, the navigation device 15 or the control device 11 calculates the distance from the current position to the destination based on the own position information, and the destination display DD is displayed on the display device 13.

The still image S in the display on the display 13 is D
The information is displayed when the AB receiver 10 receives the information on the road included in the map information as a still image. The display R during DAB reception is displayed under the control of the control device 11 while the DAB receiver 10 is operating. The time display T is controlled by the navigation device 15 or the control device 11.
Is displayed.

[0061]

According to the first aspect of the present invention, a navigation device including a GPS receiver and a map information generator for generating position information, a display, and a plurality of carriers whose frequency components are orthogonal to each other are used. Time synchronization signal generating means for supplying a digital orthogonal frequency division multiplexed modulated signal obtained by modulating an information signal, automatic frequency control means for supplying a digital orthogonal frequency division multiplexed modulated signal, and the automatic frequency control means A fast Fourier transforming means to which the orthogonal frequency division multiplexed modulated signal controlled by the automatic frequency control and a time synchronizing signal from the time synchronizing signal generating means are supplied, and a digital information signal is obtained from the fast Fourier transforming means. A receiver including a demodulation device, and a navigation device, having a control device for controlling the display and the receiver,
Since the position information and the map information from the navigation device and the traffic information from the receiver are supplied and displayed on the display, various types of traffic information can be obtained with one type of receiver. A device can be obtained.

According to the second aspect of the present invention, a navigation device including a GPS receiver and a map information generator for generating position information, a display, and a plurality of carriers whose frequency components are orthogonal to each other are used. A time synchronization signal generating means for supplying a digital orthogonal frequency division multiplexed modulated signal obtained by modulating a signal; an automatic frequency control means for supplying a digital orthogonal frequency division multiplexed modulated signal; Fast Fourier transform means to which an orthogonal frequency division multiplexed modulated signal under automatic frequency control and a time synchronizing signal from a time synchronizing signal generating means are supplied, and a demodulation device capable of obtaining a digital information signal from the fast Fourier transform means , A control device for controlling the navigation equipment, the display and the receiver, and the position of the broadcasting station from the receiver Position detecting means for obtaining own position information from the information, and the display unit supplies and displays the own position information and map information from the navigation device or the position detecting means and the traffic information from the receiver. With this configuration, it is possible to obtain a navigation device capable of compensating for the case where the own position information cannot be obtained from the GPS receiver.

According to a third aspect of the present invention, in the navigation device according to the first aspect of the present invention, a storage device controlled by the control device is provided, and map information read from the storage device is supplied to the display. In addition to the effects of the first aspect of the present invention, in addition to the effects of the first aspect of the present invention, it is possible to easily utilize the latest map information and map information such as new shops, restaurants, etc., and routes for visiting them by self collection. And a navigation device capable of performing such operations.

According to the fourth aspect of the present invention, in the navigation device according to the second aspect of the present invention, a storage device controlled by the control device is provided, and map information read from the storage device is supplied to the display. In addition to the effects of the second aspect of the present invention, the map information such as the latest map information and the new shops, restaurants, etc., collected by the user, and the route for visiting them can be easily used. And a navigation device capable of performing such operations.

According to the fifth aspect of the present invention, in the navigation apparatus according to the first aspect of the present invention, the navigation device, the display, the receiver, and the control device are connected to each other through an IEEE 1394 hyper-performance serial bus. In addition to the effects of the present invention, it is possible to obtain a navigation device that can easily connect electronic devices of different standards.

According to the sixth aspect of the present invention, in the navigation apparatus according to the second aspect of the present invention, the navigation device, the display, the receiver, and the control device are connected to each other through an IEEE 1394 hyper-performance serial bus. In addition to the effects of the present invention, it is possible to obtain a navigation device that can easily connect electronic devices of different standards.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing the configuration of a DAB mode 1 frame;

FIG. 3 is a diagram showing a configuration of a DAB mode 1 frame;

FIG. 4 is a diagram showing a configuration of an FIB.

FIG. 5 is a diagram showing a configuration of a data field of FIG type 0;

FIG. 6 is a diagram showing a configuration of a data field of FIG type 5;

FIG. 7 is a diagram showing a configuration of a TII database.

FIG. 8 is a diagram showing a configuration of a TMC field.

FIG. 9 is a block diagram showing a specific configuration example of the navigation device in FIG. 1;

FIG. 10 is a sectional view showing the structure of an IEEE 1394 cable.

FIG. 11 is a timing chart showing a DS-Link encoding method.

FIG. 12 is a diagram showing an example of a display on a display.

[Explanation of symbols]

1 receiving antenna, 2 RF amplifier / frequency converter / I
F amplifier, 3 A / D converter, 4 digital I / Q demodulator, 5 FFT circuit, 6 data decoder, 7 output terminals,
Reference Signs List 8 synchronization generation circuit, 9 control device, 10 DAB receiver, 11 control device, 11A position detecting means, 12 auxiliary storage device, 13 display, 14 car AV equipment, 15
Navigation equipment, 16 IEEE1394 bus

Claims (6)

[Claims] 1. A navigation device including a GPS receiver and a map information generator for generating position information, a display, and a digital signal obtained by modulating an information signal using a plurality of carriers whose frequency components are orthogonal to each other. A time synchronization signal generating means to which an orthogonal frequency division multiplexed modulated signal is supplied,
An automatic frequency control unit to which the digital orthogonal frequency division multiplexed modulated signal is supplied, an orthogonal frequency division multiplexed modulated signal automatically controlled by the automatic frequency control unit, and a time synchronization signal from the time synchronization signal generation unit A receiver provided with a fast Fourier transform unit to which a digital information signal is obtained from the fast Fourier transform unit, and a control device for controlling the navigation device, the display, and the receiver. A navigation device comprising: a display device that supplies and displays its own position information and map information from the navigation device and traffic information from the receiver. 2. A navigation apparatus including a GPS receiver and a map information generator for generating position information, a display, and a digital signal obtained by modulating an information signal using a plurality of carriers whose frequency components are orthogonal to each other. A time synchronization signal generating means to which an orthogonal frequency division multiplexed modulated signal is supplied,
An automatic frequency control unit to which the digital orthogonal frequency division multiplexed modulated signal is supplied, an orthogonal frequency division multiplexed modulated signal automatically controlled by the automatic frequency control unit, and a time synchronization signal from the time synchronization signal generation unit A receiver provided with a fast Fourier transform unit to which a digital information signal is obtained from the fast Fourier transform unit, and a control device for controlling the navigation device, the display, and the receiver. Having position detection means for obtaining its own position information from the position information of the broadcasting station from the receiver, on the display, its own position information and map information from the navigation device or the position detection means, A navigation device, wherein traffic information from the receiver is supplied and displayed. 3. The navigation device according to claim 1, further comprising a storage device controlled by the control device, wherein the map information read from the storage device is supplied to the display and displayed. A navigation device characterized in that: 4. The navigation device according to claim 2, further comprising a storage device controlled by the control device, wherein the map information read from the storage device is supplied to the display and displayed. A navigation device characterized in that: 5. The navigation device according to claim 1, wherein the navigation device, the display, the receiver, and the control device are connected to each other through an IEEE 1394 hyper-performance serial bus. . 6. The navigation device according to claim 2, wherein the navigation device, the display, the receiver, and the control device are connected to each other through an IEEE 1394 hyper-performance serial bus. .