JPH01277278A - On-vehicle navigation device - Google Patents

Abstract

PURPOSE:To improve a goods property by exchanging and supplying a recording medium for map information to a reproducing means at an inter-music part before its own vehicle deviates from a storage map range stored in a map information storage means, and reading out new map information from the recording medium for map information. CONSTITUTION:When it is decided that the position of its own vehicle starts to deviate from the storage map range stored in the map information storage means B by a first decision means C at the time of deciding a state as inter- music by a second decision means D on the middle way of the reproduction of a music information recording medium 10 by the reproducing means A, a command signal to supply the map information recording medium 11 instead of the music information recording medium 10 is outputted from a readout control means E to the reproducing means A. In such a way, it is possible to prevent music from being interrupted on the middle way of the reproduction of the music information recording medium, thereby, the goods property can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle navigation device, particularly a playback device for reading out map information from a map information recording medium storing map information for navigation, etc. The present invention relates to a vehicle navigation device which is also used as a playback device for playing back music information from a recording medium.

(Prior Art) As this type of vehicle navigation device, one described in, for example, Japanese Patent Laid-Open No. 61-209316 is known. The navigation computer has a built-in road map memory that stores road map information and an intersection data memory that stores information such as intersection shapes and distances between intersections.
A road map screen read out from the road map memory is displayed on a display such as a display, and the vehicle position obtained by referring to intersection data of roads to be passed, etc. stored in advance in the intersection data memory is displayed on the display. The system guides the user to the destination by sequentially displaying the intersections on the road map screen displayed on the screen. Incidentally, digitally storing image information such as road maps requires a large amount of storage capacity, but the current internal memory for in-vehicle computers is absolutely insufficient in capacity to store maps that cover the entire country. Since it cannot store information, it has no choice but to rely on external storage devices. Various types of map information recording media can be considered for such external storage devices, but at present, compact discs (hereinafter referred to as rcDJs) are used due to the memory capacity and access time.
CD-ROM (hereinafter referred to as ``Map CDJ'') using
) is in the stage of practical application.

On the other hand, in this type of vehicle, a CD (hereinafter referred to as "music CD") that records music information is used as a source for the in-vehicle audio system.
) is sometimes used.

In such a case, there is an idea to use the reproducing device for reading out map CDs for navigation also for reproducing music CDs.

(Problem to be Solved by the Invention) However, in a navigation device employing a system configuration in which a map CD and a music CD are selectively played back by a single playback device as described above, this navigation device The map information read out from the map CD by the above playback device is temporarily stored in the RAM provided in the controller, and part of the map information is called up as needed and displayed on the display as a road map. It is customary to do so.

By the way, when driving while playing a music CD using the above-mentioned playback device, as shown in Fig. 9, the above-mentioned RA
There may be cases where there is no room left for the map stored in the map storage area reserved for M. In such a case, when the end of the virtual map in the map storage area is reached, the music CD should be forcibly removed from the playback device, replaced with the Earth IIcD, and the necessary map information should be read from this map CD. The most conceivable control method is to then insert the music CD into the playback device again and resume from where it was interrupted. but,
When reading out a map CD, in the worst case, it may take about 35 seconds to read out, and if the music CD is interrupted during that time, the listener may feel uncomfortable.

The present invention enables a vehicle navigation device having a single playback means capable of selectively playing back a recording medium for music information and map information to avoid a situation where the music is interrupted during the playback of a music CD. The aim is to avoid this as much as possible.

(Means for Solving the Problems) In order to achieve the above object, a vehicle navigation device according to the present invention is characterized in that it is configured as follows.

That is, as shown in FIG. 1, in a configuration having a single reproducing means A capable of selectively reproducing recording media for music information and map information, the map information record read by the reproducing means A is A map information storage means B for storing map information of a medium, a first determination means C for determining the own vehicle position in the storage map range stored in the map information storage means B, and a first determination means C for determining the position of the own vehicle in the storage map range stored in the map information storage means B, a second determining means for determining the interval between songs of music information on a music information recording medium; Upon receiving the signals from the second determining means C and D, the map information recording medium is exchanged to the reproducing means A during the inter-song portion before the own vehicle deviates from the stored map range stored in the map information storing means. It is characterized by comprising a readout control means E for reading out new map information from the map information recording medium.

(Function) According to the above configuration, when the second determining means determines that it is between songs while the music information recording medium is being reproduced by the reproducing means A, the first determining means C determines that the map information is If it is determined that the vehicle position is likely to deviate from the storage map range stored in the storage means B, a command signal is read out to supply the map information recording medium to the reproduction means A instead of the music information recording medium. Since it is output from the control means E, it is possible to prevent the music from being interrupted while the music information recording medium is being played back by the playback means A, thereby improving marketability.

(Example) Examples of the present invention will be described below.

As shown in FIG. 2, the controller 2 of the navigation device 1 according to the present embodiment includes a CPU 3 for executing various calculations and controls, a ROM 4 in which main programs and subroutines are stored, and a controller 2 for performing calculations by the CPU 3. Temporarily store calculated calculation results and various data:
It is equipped with a RAM 5 and an I10 interface 6 for input/output. A vehicle speed sensor 7 detects the vehicle speed.
and an output signal from an orientation sensor 8 that detects the orientation is input to the above-mentioned work/○ interface 6.

On the other hand, the music CD 10 and the map CD 11 are selectively supplied to the CD autochanger 9, which is a type of CD player, by a control signal output from the I10 interface 6. If this CD
For example, when a music CD 10 is loaded into the autochanger 9, a serial data signal read from the music CD 10 is output to the audio playback device 12, and this serial data signal is converted into an audio signal by the audio playback device 12. , the acoustic signal is amplified and then output to the speaker 13. In addition, a serial data signal is outputted from the CD autochanger 9 to the I10 interface 6 of the controller 2, and depending on the presence or absence of the sound signal of the user's bit of the music CD 10 included in this serial data signal, the operation will be described later. The cpU3 will make a determination between the songs.

In addition, the I10 interface 6 of the controller 2
A road map screen is displayed on the display 14 connected to the display 14, and on this road map screen, information about the own vehicle calculated by the CPU 3 based on each output signal from the vehicle speed sensor 7 and the direction sensor 8 is displayed. A location cursor is now displayed to indicate your current location.

In addition, the map CD11 is added to the CD autochanger 9 above.
When the map information stored in the map CD 1l is imported, the map information stored in the map CD 1l is input from the CD autochanger 9 to the I10 interface 6 as a serial data signal.

Next, the operation of this embodiment when the music CD 10 is used will be explained with reference to a flowchart showing the operation of the CPU 3. Note that before explaining the processing operations of the CPU 3 in the main program, the subroutines executed by the CPU 3 will be explained first.

First, in the song interval determination routine, the CPt13 executes processing as shown in the flowchart of FIG. That is, the CPU 3 first determines whether a sound signal is input in step S1. If the determination result is YES, the CPU 3 advances to step S2 and outputs the music CD being played.
Enter the song number (Mk) and performance time (Tk) of l0. For this purpose, the initial data transferred from the CD autochanger 9 to the RAM 5 when the music CD 10 currently being played is loaded into the CD autochanger 9 is used. Then, in step S3, the CPU 3 starts time discounting of a built-in timer set in accordance with the performance time (Tk). Note that the built-in timer is set when the first sound signal is input.

Next, in step s4, the CPU 3 determines whether or not the time discount operation of the built-in timer has ended.
When the judgment result is YES, the above performance time E (T k
) has ended, but the CPU 3 determines that it is between songs, sets the flag F1 to "1", and sets the flag F1 to "1".
A return operation is performed by calculating 1 as k (steps S, S6).

Note that when the determination result in step S1 is No, that is, when there is no sound signal, it is considered that there is an interval between songs, so the CPU
3 jumps to step S5. Also, step S4
If the determination result is No, it is assumed that the song is in progress because the time discount operation of the built-in timer has not finished, and the CPU 3 returns without executing steps S5 and S6. That is, in this inter-music determining routine, it is determined that there is an inter-musical interval only when the flag Fl is "1".

Next, in the own vehicle position determination routine, the CPU 3 executes processing as shown in the flowchart of FIG. That is, the CPU 3 first inputs the own vehicle position (x, y) in step S. Note that the own vehicle position (x, y) is calculated based on output signals from the vehicle speed sensor 7 and the direction sensor 8.

Next, after inputting the vehicle speed (V), the CPU 3 inputs the vehicle speed (
Determine whether there is a change in V) (steps Ss, S9)
.

By the way, a map storage area for storing map information is preset in a part of the RAM 5, and an arbitrary address in this map storage area corresponds one-to-one with the coordinates of the road map. Therefore, as shown in FIG. 5, a storage map range 15 corresponding to the map storage area is virtually set, and the following discussion will proceed based on the storage map range 15. That is, the above vehicle position (x, y) is uniquely marked somewhere inside this memory map range 15,
As the vehicle moves, the coordinates of the vehicle's position (x, y) will also change. Moreover, this memory map range 15 is
It is divided into an inner first region 16 bounded by the dotted line in the figure and a second region 17 bordered by hatching. If the map information of the map CDII is read into the RAM 5 when the own vehicle position (x, y) is located at Pl of the first area 16, for example, this will be handled when the traveling direction of the vehicle changes. In order to avoid such a risk, the direction of travel is determined to some extent, and the vehicle position (x, y) is within the memory map range 15.
This is to request the map CDII to be read at a sufficient stage until the deviation from the current state occurs. In other words, own vehicle position (x, y)
When the map passes beyond the first area 16 and enters the second area 17, a request to read the map CD 11 is generated.

Returning to the main topic, step S9 of the flowchart in FIG.
When the determination result that there is no change in the vehicle speed (V) is obtained, the CPU 3 determines whether the own vehicle position (x, y) is located in the second region 17 in step SIO. In this case,
For example, the own vehicle position (x
, y) is marked, CPU3 says YES
It is determined that the flag F2 is set to "1" in step Stt. On the other hand, if the own vehicle position (x, y) is marked, for example, at Pl in the memory map range 15, the CPU 3 determines No and performs a return operation without executing step Sll.

Note that when the determination result that there is a change in the vehicle speed (v) is obtained in step S9, the CPU 3 performs the second
At the same time as performing change calculations for the area 17, change settings for the second area 17 are executed in step S13. This is because, for example, when the vehicle speed (v) increases, the time required for the own vehicle position (x, y) to reach the end of the memory map range 15 is shortened, so the boundary between the second area 17 and the first area 16 is This is to move the second area 17 from the position indicated by the dotted line to the position indicated by the two-dot chain line in FIG. 5 to enlarge the second area 17, so that a request to read the map CD 11 is generated at an early stage. Note that the change setting of the second area 17 may be performed based on a function of the vehicle speed (V) stored in the ROM 4 in advance.

Next, the overall processing operation executed by the CPU 3 in this embodiment will be explained with reference to the flowchart of FIG.

In other words, when the main program starts, CPU3
First, initialize the system, then play the music CD.
Determine whether l0 is used (step S14
+S15) *When the determination result that the music CDl0 is used is obtained, the CPU 3 sets the flag F2 and the flag F! After clearing, the CPU 3 executes the song interval judgment (steps 316 to 5ta), and after obtaining the judgment result, executes the own vehicle position judgment, and after obtaining the judgment result, sets the flag Fl. (Step S)
19+520), when Fl = O, it is not between songs, so return to step 31g, and this step 5
The processing from IJI to step 820 is repeatedly executed until it is determined that F1=1. Then, when F=1, that is, between songs, the flag F is set in step S21.
Determine the value of 2. In this case, when F2=0,
The own vehicle position (x, y) is in the first area 16 of the memory map range 15
For example, P is marked, and map C is marked even between songs.
Since there is no need to read DII, the process returns to step S1 and clears flag F1. Then, the music CD 10 will start playing the next song without interruption even between songs. On the other hand, in step S21, the flag F2 is set to F2.
= 1, the CPU 3 determines the song number (Mn
) in RAM 5, music CD 10 is stored as map CD
11 to replace I10 interface 6 to C
Output the control signal to the D autochanger 9 and change the map C.
The reading of D11 is executed until it is determined that the reading operation is completed (steps 82S to 525), and the map CD
At the point when it is determined that the reading operation of 1l is completed, the CPU
3 is a CD to replace map CDII with music CD10.
A control signal is output to the autochanger 9 via the I10 interface 6, and all data of song numbers included in the initial data of the music CD 10 output from the CD autochanger 9 are input and stored in the RAM 5 (step 326+52). , CP after signing
U3 is the song number of the song recorded on the music CD10<Mk
) is compared with the stored song number (Mn) stored in the RAM 5 (steps SZa to 530), and the stored song number (
When Mn) is searched, step SSt is executed and the I10 interface 6 is sent to the CD autochanger 9.
After outputting the reproduction start signal of the music CD 10 through the step S1, the process returns to step S1.

As a result, while the own vehicle position (x, y) is marked in the second area 17 near the end of the memory map range 15, as shown in FIG. At the time when the music CD 10 has arrived, the switching operation from the music CD 10 to the map CD II is performed, and when the reading operation from the map CD 11 is completed, the next song will be played from the beginning.
The music being played is no longer interrupted mid-song, and the situation where the listener feels uncomfortable can be avoided.

In addition, in step S2 of the flowchart showing inter-musical determination in FIG.
When a music number (Mk) with
If we wait for the D10 interval, there is a risk that the vehicle's position (x, y) will deviate from the memory map range 15, so forced switching control as shown in the flowchart in Figure 8 is executed. You can.

In this forced switching control, the CPU 3 determines the position of the own vehicle in step S, 2. 1f(x, y) and step S
33, the end coordinates of the memory map range 15 (X.

, yo). Then, the CPU 3 determines x=x or 3/=3'O in step S34, and
When a determination result of either x or V=yo is obtained,
The CPU 3 selects the map CD from the music CD l0 in step S35.
A control signal for forcibly switching to CD 11 is output to the CD autochanger 9 via the I10 interface 6. Note that if the determination results of X≠Xo and y≠yo are obtained in step S34, the CPU 3 performs a return operation without executing step SSS.

As a result, the player can listen to the performance from the music CD 10 until the vehicle position <x, y) reaches the end of the storage map range 15.

(Effects of the Invention) As described above, according to the present invention, in a vehicle navigation device having a single reproducing means capable of selectively reproducing a recording medium for music information and map information, the map information is stored in the map information storage means. The map information recording medium is exchanged and supplied to the playback means during the inter-song portion before the vehicle deviates from the stored map range, and new map information is read from the map information recording medium. This has the advantage that interruption of the music while the recording medium is being played back by the playback means is prevented as much as possible, and marketability is improved.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a navigation device according to the present invention, FIGS. 2 to 8 are drawings showing embodiments of the present invention, and FIG. 2 is a system of a navigation device and an audio playback device in this embodiment. 3 is a flowchart showing a subroutine for determining between songs, FIG. 4 is a flowchart showing a subroutine for determining own vehicle value 1, and FIG. FIG. 6 is a flowchart showing 1fR of the main program of this embodiment, FIG. 7 is a time chart of processing operations executed by the main program of FIG. 6, and FIG. 8 is a music CD playing time. FIG. 9 is a flowchart showing forced switching control when a long piece of music is played. FIG. 9 is a time chart showing one aspect of the processing operation of the navigation controller when the present invention is not implemented. 3...first judgment means, second judgment means, reading control means (
CPU)-5...Map information storage means (RAM), 9.
... Reproduction means (CD autochanger), 10...
Music information recording medium (music CD), 11... Map information recording medium (map CD). Figure 3 Figure 4 Figure 8 Figure 9

Claims (1)

[Claims] (1) A vehicle navigation device having a single reproducing means capable of selectively reproducing a recording medium for music information and map information, the map information of the map information recording medium being read by the reproducing means. a map information storage means for storing the map information, a first determination means for determining the own vehicle position within the storage map range stored in the map information storage means, and a music information recording medium being reproduced by the reproduction means. Receiving signals from the first and second determining means while the music information is being read from the music information recording medium by the second determining means for determining the interval between songs of the music information and the reproducing means, A map information recording medium is exchanged and supplied to the reproducing means in the inter-song section before the vehicle deviates from the stored map range stored in the map information storage means, and new map information is read from the map information recording medium. What is claimed is: 1. A vehicle navigation device comprising: readout control means.