JPH0927163A - On-board disk exchanging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-board disk exchanging device capable of performing exchanging among plural kinds of disk and properly operating a safety compen sation function even when a plurality of master units are connected. SOLUTION: A detecting circuit 6 is connected to an automobile parking brake and detects the traveling of the automobile. A control microcomputer 1 determines the kind of a disk being reproduced from disk TOC information from a servo and signal common processing part 3. The control microcomputer 1 controls a video signal processing circuit 5 according to a detection result from the detecting circuit 6 and the determination result of the kind of the disk and controls a video signal output obtained from the disk being reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted disc exchanging device for mounting a plurality of discs such as CDs (compact discs) and selecting and reproducing the discs.

[0002]

2. Description of the Related Art A CD player is widely used as one component unit of an audio system for automobiles, which is commonly called a car audio system.

In view of the fact that it is problematic in terms of safety for the driver to exchange the discs while the automobile is driving, a plurality of discs are loaded in advance and the plurality of discs are loaded. Prepare an in-vehicle disc exchange device that selects and plays a disc according to the user's selection instruction from the operating panel surface or the transmitter of the remote control device (hereinafter referred to as the remote commander). ) Is also a prize system that allows you to automatically play multiple discs by simply performing the required key operation.

This system comprises a master unit having an operation panel surface and a remote commander receiving section, a vehicle-mounted disc exchanging device called a CD changer, a speaker as an audio monitor device, and a color cathode ray line added as necessary. It is composed of an image display monitor device such as a tube or LCD.

The conventional vehicle-mounted disc exchange device is intended only for reproduction of music CDs and CD-Gs (CD graphics), and it is possible to exchange control commands by connecting through a communication bus line. There was one type of master unit. The CD-G is a disc on which not only music information but also graphics images, character information and the like are recorded as sub-coding information.

On the other hand, the map information is recorded in a CD-ROM, and the present position of the vehicle on this map information-a method of using a GPS system for measuring by using a satellite,
There is known a navigation device for a vehicle that displays an information such as a method of calculating a traveling direction and a traveling distance by using an angular velocity sensor such as a piezoelectric vibration gyro.

[0007] Usually, a car navigation system (hereinafter, simply referred to as a navigation system) has a relatively large display screen. Then, on this display screen, as described above, the map information from the CD-ROM and the mark indicating the position of the own car which changes every moment as the vehicle runs are displayed. Then, the driver is notified of the position of his / her car by moving a mark indicating the position of his / her car on the map or scrolling the map.

As a result, the driver can always know the exact position of his / her own car without the troublesome work of turning over the map book and following the map as in the past, and he / she gets lost. You can reach your destination without having to.

However, if the displayed map screen is frequently changed, it may be a hindrance to driving. Therefore, the following measures are taken.

That is, in general, when a vehicle equipped with the navigation device is traveling,
A so-called safety compensation function is provided so that only a still image is displayed and the displayed image is not scrolled.

In order to operate this safety compensation function, the navigation device is provided with a sensor (hereinafter referred to as a safety sensor) for detecting whether the vehicle (vehicle equipped with the navigation device) is running or is stopped. ing.

The safety sensor may be, for example, an acceleration sensor or a sensor provided so as to be linked to a parking brake of a vehicle.

The former safety sensor is provided in the housing of the navigation device and has no connection to the other, but the latter safety sensor is connected so as to interlock with the on / off of the parking brake of the vehicle. It When a safety sensor connected to the parking brake is used, the navigation device detects that the vehicle is running when the safety sensor detects that the parking brake is not applied, and On the contrary, when it is detected that the parking brake is applied, the own vehicle detects that it is stopped.

When it is detected by the safety sensor that the vehicle equipped with the navigation device is traveling, the navigation device is controlled by a safety compensation function such as stopping scrolling of the map.

[0015]

By the way, in recent years, there has been provided a television system which has a relatively large display screen using, for example, an LCD (liquid crystal display) and can receive a television broadcast favorably and display an image even if it is small. Has been done. Such a small television system is suitable for mounting on a vehicle, and recently, a large number of users have mounted this type of small television system on a vehicle.

Then, by connecting a video CD player or a CD-G player to the television system mounted on the automobile, it becomes possible to reproduce and watch moving images. However, when a driver watches a video while driving,
It is dangerous because it may interfere with driving. Therefore, it is conceivable to provide a safety compensation function similar to that of the navigation device described above to ensure safety.

However, in this case, a safety sensor is required for each device for reproducing a moving image such as a video CD player or a CD-G player. As described above, it is wasteful and costly to have the safety sensor redundantly present in one vehicle. For example, when the safety sensor of the type interlocked with the parking brake is used, It is necessary to connect a plurality of safety sensors to the parking brake, which makes it difficult to mount and connect the device for reproducing the moving image on the vehicle.

Some TV systems have a safety compensating function by incorporating a safety sensor, and the safety compensating function of this television system is provided by a video CD player or a CD-G.
Although it may be applied to the video output of the player, in a television system equipped with this kind of safety sensor, the connection with the video CD player or the CD-G player may not be taken into consideration, which is not sufficient. There are cases. In addition, even if the television system has a safety compensation function, it may not be used because the manufacturer and model of the television system are different from that of the disc player.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an in-vehicle disc exchange device capable of eliminating the above problems.

[0020]

In order to solve the above-mentioned problems, an in-vehicle disk exchange apparatus according to the present invention receives a control signal from a master unit which receives a user's operation input, and exchanges a disk signal and a signal from the disk. In an in-vehicle disc exchange device for performing reproduction, a video output signal is supplied to a plurality of types of reproducible discs by receiving a signal from a common signal processing circuit and a signal from the common signal processing circuit. A video signal processing circuit to be formed,
It is provided with a detecting means for detecting whether or not the vehicle equipped with the on-vehicle disc exchanging device is running, a controlling means, and a discriminating means for discriminating the type of the disc being reproduced. The video signal processing circuit is controlled according to the detection result and the disc type discrimination output from the discriminating means to control the video signal output obtained from the disc being reproduced.

In the on-vehicle disc exchanging device according to the present invention having the above structure, the discriminating means discriminates the type of the disc being reproduced on the basis of the information of the disc being reproduced from the common signal processing circuit. The detection means detects whether or not the automobile equipped with the on-vehicle disc exchange device is running.

Then, the control means determines whether the vehicle is traveling and the disc providing the moving image information is being reproduced according to the detection result from the detection means and the determination result from the determination means. In that case, the video signal processing circuit is controlled so that the moving image is not provided.

As a result, even if the disc that provides the moving image is reproduced while the vehicle equipped with the on-vehicle disc exchanging device is running, the safety can be ensured without hindering the driving.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Several embodiments of an on-vehicle disk exchanging device according to the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram for explaining a vehicle-mounted system to which the vehicle-mounted disk exchanging device according to the first embodiment is applied.

Master units 20 and 30 are connected to the vehicle-mounted disk exchange device 10 of this embodiment by bus lines 40 and 50. In this case, the master unit 20 has a video CD and a CD-
A player compatible with G, and the master unit 30
Is an audio device such as a cassette deck, a CD player, a mini disc player, or a composite device thereof.

The master unit 20 is not shown,
It is provided with a video signal input terminal and a display such as an LCD, for example, and is capable of receiving a video signal and displaying an image. Further, the master units 20 and 30 are control microcomputers (hereinafter, referred to as control microcomputers) 2 that form control commands.
1 and 31, and an operation panel (not shown) for the operator to perform an input operation.

As shown in FIG. 1, a vehicle-mounted disk exchange apparatus 10 of this embodiment has a control microcomputer (hereinafter, referred to as a control microcomputer) 1 for controlling the entire apparatus 10, a mechanical deck driver 2, a servo, and a servo and The signal common processing unit 3, the audio signal processing circuit 4, the video signal processing circuit 5, the detection circuit 6 for detecting whether or not the vehicle equipped with the device 10 is running, and the communication bus interfaces 11 and 12 are provided. ing. The detection circuit 6 constitutes the above-mentioned safety sensor.

The mechanical deck driver 2 is for driving a mechanical part such as disk replacement, and is drive-controlled by a control signal from the control microcomputer 1.

Although not shown, the servo / signal common processing section 3 includes a spindle motor for rotating the disk and a two-dimensional actuator for moving the optical pickup in the radial direction of the disk, and has a tracking servo, a focus servo and a spindle servo. And a circuit portion for performing common signal processing on a reproduced signal such as a reproduced RF signal processing circuit and an error correction decoding processing circuit.

Digital audio data or digital video data is obtained from the servo / signal common processing section 3 and supplied to the audio signal processing circuit 4 or the video signal processing circuit 5, respectively.

The control microcomputer 1 receives the TOC (Table Of Cond.
tents) information for discriminating the type of each disc, and a memory (not shown) for storing the types of a plurality of discs loaded in the vehicle-mounted disc exchanging device 10 in advance. Then, while recognizing a plurality of loaded disks from the contents of this memory, processing such as disk selection according to the control command is performed, and in the case of a control command for a disk that does not exist, that processing is not performed. , Make a display that calls attention. This display is performed, for example, in the master unit.

The audio signal processing circuit 4 performs processing for converting a digital audio signal into an analog audio signal based on the control signal from the control microcomputer 1 and outputs an audio output signal. Although not shown, the output audio signal is supplied to a speaker via an audio amplifier and reproduced.

The video signal processing circuit 5 includes a control microcomputer 1
A video output signal is output by performing processing for converting a digital video signal into an analog video signal on the basis of a control signal from. The output video output signal is supplied to a display monitor device (not shown) or is supplied to the master unit 20, and an image based on the video output signal is displayed on a display such as an LCD mounted on the master unit 20. To be done.

The video signal processing circuit 5 has a frame memory, a character generator, a work memory, etc., and can perform so-called screen still. That is, the video signal processing circuit 5 has a function of forcibly converting the video output signal into a still image video signal in accordance with the control signal from the control microcomputer 1.

The detection circuit 6 outputs an output ED whose DC level changes depending on whether or not an automobile equipped with the same is running.
Supply to the control microcomputer 1. That is, the detection circuit 6 is
In the case of this example, as shown in FIG. 1, it is formed by resistors R1 and R2 and diodes D1 and D2, and is connected to a switch SWp which is interlocked with ON / OFF of a parking brake of an automobile. This switch SWp is normally used in an automobile for an indicator for monitoring the state of the parking brake. When the parking brake is on (brake is applied), the switch SWp is also on and when the parking brake is off. , Switch SWp
Will also be off.

Therefore, the output ED of the detection circuit 6 has the parking brake applied (brake on).
During the period, that is, while the vehicle is stopped, the DC voltage + 5V has a voltage value divided by the resistors R1 and R2, and the voltage becomes a high level of + 5V when the parking brake is off, that is, when the vehicle is in a traveling state. It becomes a value.

The voltage ED supplied from the detection circuit 6 to the control microcomputer 1 is for notifying the microcomputer 11 of the detection result from the detection circuit 6, and the control microcomputer 1
Although not shown in the figure, the control microcomputer 1 inserts a key into the vehicle, and when the key is set in a state in which power is supplied to the power supply system, the power source voltage from the battery of the vehicle is not shown in the control microcomputer 1. It is always supplied.

The communication interfaces 11 and 12 use the synchronous communication system proposed by the applicant of the present invention in this example. The outline of this synchronous communication system is as follows.

That is, communication is performed using two lines, a data line and a clock line. The data is bidirectional in that it communicates in the form of serial data, but the clock is synchronous communication that is output only from the master unit 30. Further, a line (communication line) called a so-called bus-on line is further provided, and communication is possible when this line is at a high level. All communications are managed by the Master Unit. When the data line is at the low level, communication is performed from the master unit to the slave unit, and when the data line is at the high level, communication is performed from the slave unit to the master unit.

The data is composed of four parts: address, operation, parity byte, and error byte. Address is 2 bytes, operation is 2 to 11 bytes,
The parity byte and the error byte each consist of 1 byte. The destination and the source of the data are distinguished by the address, and one data has 6 to 15 bytes.

Control microcomputer 21 of master unit 20
Identifies the user's operation input from the operation panel,
When a control command is generated and the command is to be transferred to the in-vehicle disk exchange device 10, it is sent to the exchange device 10.

Then, for example, when an operation input for reproducing a video CD is made in the master unit 20, the control command formed in the control microcomputer 21 causes the vehicle-mounted disc exchange via the bus line 40 and the communication interface 11. It is supplied to the control microcomputer 1 of the apparatus 10. The control microcomputer 1 forms a control signal for controlling each part of the in-vehicle disk exchange device 10 based on the supplied control command, supplies the control signal to each part, and detects the detection circuit 6
Whether the vehicle is running or stopped is detected according to the level of the voltage supplied from the low level or the high level.

Then, the mechanical deck driver 2 selects a video CD from a plurality of discs loaded in the vehicle-mounted disc exchanging device 10 on the basis of a control signal from the control microcomputer 1 according to an operation input by the operator, The video CD and the disc on the fixed table on which the disc to be played are placed are exchanged. Then, the converted video CD is checked on the fixed table, and the reproduction process is started.

When the reproduction process is started, the relevant video CD
The information recorded in (1) is read by the servo and signal common processing unit 3, where digital audio data and digital video data are formed. Then, the digital audio data is supplied to the audio signal processing circuit 4, and the digital video data is supplied to the video signal processing circuit 5.

When the control microcomputer 1 detects that the detection result from the detection circuit 6 indicates that the vehicle is running, the TOC of the disc to be reproduced from the servo and signal common processing section 3 is detected. The type of the disc to be played back is discriminated from the information. If the result of this determination indicates that it is a video CD that also provides moving picture information or a CD-G, the control microcomputer 1 controls the video signal processing circuit 5 so as not to display the moving picture. To do.

In this case, the video signal processing circuit 5 uses the screen still function described above to convert an image provided as a moving image into a video signal providing a still image.

It should be noted that it is also possible to prohibit the reproduction of moving images by using a so-called blue background in which the background is a single blue color. Further, at that time, characters or characters indicating the type of the disc being reproduced may be displayed.

The video output signal from the video signal processing circuit 5 is supplied to the master unit 20, and when the automobile is running, no moving image is displayed and a still image is displayed. It should be noted that the audio signal is reproduced as usual regardless of whether the moving image is displayed or not.

From the master unit 20, the CD-
Even when a control command for instructing to exchange and reproduce G is provided to the vehicle-mounted disc exchange apparatus 10, the vehicle-mounted disc exchange apparatus 10 can perform the above-mentioned video when the vehicle is running. As with CDs, do not play back moving images or images that change frequently.

When a music CD is exchanged and reproduced by a control command from the master unit 30, no moving image is provided. Therefore, the audio signal is reproduced as usual, amplified through the amplifier, and emitted from the speaker.

Further, when the CD-ROM is exchanged and reproduced, if the provided image is a still image, it is output as it is, and when it is a moving image, rewriting of the video memory is prohibited and a screen still image is displayed. Or, a blue background.

As described above, the in-vehicle disc exchange device 10 of this example has a safety compensation function for controlling the display of image information as follows according to the type of disc being reproduced while the automobile is running. To work.

For music CD, normal playback. In the case of CD-G, the disc type is displayed as a screen still or blue background. The audio signal is normally played. For video CDs, the disc type is displayed as a screen still or blue background. The audio signal is normally played. In the case of a CD-ROM, the normal playback is displayed for still images, the screen type is displayed for moving images, or the disc type is displayed as a blue background. The audio signal is normally played.

In the case of No. 1, as described above, the reproduced music CD does not provide a moving image. For this reason,
Even when the automobile is running, the normal reproduction process is performed and the audio signal is reproduced.

In the case of (1), the disc to be played back provides a moving image, and it is dangerous for the driver to watch the moving image while driving. Therefore, as described above, in the video signal processing circuit 5, the video signal output is controlled so that the safety compensation function is activated so that the moving image is not displayed while the vehicle is running.

In the case of (1), the image provided by the CD-ROM is mainly a still image.

Therefore, when the recorded data is a still image,
When reproduced normally, and the recorded image is a moving image, the image is not scrolled and a still image is provided.

As described above, the safety compensating function is processed on the side of the exchange device 10 by the detection output of the detection circuit 6 as the safety sensor of the on-vehicle exchange device 10 and the disc discrimination result of the control microcomputer 1. Therefore, the exchange device 10 can always provide the video signal whose output is controlled by using the safety compensation function of the exchange device 10 side, without being influenced by the device to which the video signal is supplied.

Further, by increasing the number of communication interfaces,
Even when the master unit is connected to three units or four units, the switching device 1
A zero-safety compensation function can be used to provide output controlled video signals.

[Second Embodiment] FIG. 2 shows a second embodiment of an in-vehicle system to which the in-vehicle disk exchange device of this example is applied.
3 is a block diagram for explaining an embodiment of FIG.

To the in-vehicle disk exchange device 110 of this example, two master units 120 and 130 having different communication systems and control command formats are connected by bus lines 140 and 150. In this example,
The master unit 120 is a navigation device, and the master unit 130 is a video CD player or a CD-
It is a G player.

As shown in FIG. 2, a vehicle-mounted disc exchange apparatus 110 of this example has a control microcomputer 101 for controlling the entire apparatus 110, a mechanical deck driver 102, a servo / signal common processing section 103, and an audio signal processing. Circuit 104, video signal processing circuit 105, and detection circuit 1 for detecting whether or not a vehicle equipped with this device 110 is running.
06, and communication bus interfaces 111 and 112
And UART (universal asynchro
nous receiver transmittte
r) circuit 113.

In this example, the vehicle-mounted disk exchange apparatus 110 is the same as the vehicle-mounted disk exchange apparatus 10 of the first example except for the communication interface 111 and the UART circuit 113.
And has substantially the same configuration.

In the case of this example, the video signal processing circuit 105
The video signal from the master unit 130 is the LCD display element provided in the master unit 130.
The image is supplied to an image monitor device provided separately from and the image is displayed.

The communication interface 111 is an asynchronous communication interface in this example. That is, the communication between the master unit 120 and the vehicle-mounted disk exchange device 110 is performed in the asynchronous mode used in serial data communication between personal computers and microcomputers.

That is, as shown in FIG. 3, for example, the start bit is confirmed by detecting that the data line, which is "1" when not in use, becomes "0". Then, for example, 8-bit serial data b1 to b
If it is 8, it is always "1" after the last bit b8, and by detecting this, the stop bit SP is confirmed. In this way, the serial data is transmitted in the format sandwiched between the start bit and the stop bit.

In the case of this example, the UART circuit 113, which is widely used, serializes the data.
Parallel conversion is performed. Parallel data communication is performed between the UART circuit 113 and the control microcomputer 101. Therefore, in order to decode the control command, an expensive dedicated decoder is not required, and an inexpensive general-purpose UART chip is mounted on the in-vehicle disk exchange device 110.
The device can be constructed inexpensively.

As described above, the start-stop synchronization method is generally used for communication between microcomputers, has high versatility, and enables communication with a control microcomputer 121, which will be described later, of the navigation device 120.

Although not shown, the navigation device 120 includes an operation panel, a map for navigation, a display having a relatively large display surface for displaying its own position, and a CD-ROM reproducing process in which the map is recorded. The navigation device 120 itself has a reproduction processing unit and the like, and also functions as a navigation system.

Further, the navigation device 120 is shown in FIG.
As shown in FIG.
For example, an acceleration sensor or the like is provided with a safety sensor 122 that detects whether or not a vehicle equipped with the vehicle is running. The control microcomputer 121 is notified of the detection result from the safety sensor 122, and the safety compensation function can be operated on the navigation device 120 side.

In this example, the navigation device 120 has a video input terminal 123, and the video output signal from the disk exchanging device 110 is input to this video input terminal. The user navigates to the navigation device 120.
When an instruction is given to perform navigation using the disk exchanging device 110 from the operation panel, a map or the like is displayed by the video signal from the video input terminal 123. In the case of this example, the safety compensation function for the video signal from the video input terminal 123 is also configured to be executed by the navigation device 120.

The control microcomputer 121 forms a corresponding control command based on the detection result from the safety sensor 122 and the operation input by the operator.
40, communication interface 111, UART circuit 11
3 to notify the control microcomputer 101 of the vehicle-mounted disk exchange device 110.

The master unit 130 composed of a video CD player and a CD-G player is not shown,
An operation panel is provided, and an operator inputs an operation via this operation panel. Further, as shown in FIG. 2, the master unit 130 includes a control microcomputer 131, forms a control command in accordance with an operation input made through the operation panel, and mounts the vehicle-mounted disk exchange device 110.
To the control microcomputer 101.

The master unit 120 and the master unit 130 are connected, for example, to the master unit 12 connected to the communication interfaces 111 and 112.
0, it is detected by the control microcomputer 101 by monitoring the communication line with the master unit 130.

Also, instead of monitoring the communication line,
When connected to the connector, a sensor for detecting it may be provided, and the connection can be detected by the output of the sensor. Although not shown, the master unit 12
The connection of the master units 120 and 130 can also be detected by detecting the level of the power supply voltage supplied to the in-vehicle disk exchange device 110 via 0 and 130. Whichever method is used, the connection detection signal is supplied to the control microcomputer 101 to be informed.

Further, whether the connected master unit is the navigation device, the video CD player or the CD-G player can be determined by a control command or the like transmitted / received via the communication line.

Then, when an operation input for exchanging and reproducing the video CD loaded in the in-vehicle disc exchanging device 110 is inputted through the operation panel of the master unit 130, the control microcomputer 131 forms a control command. Notifies the control microcomputer 101 of the on-vehicle disc exchange device 110.

Then, the control microcomputer 101 includes the control microcomputer 121 of the master unit 120 and the bus line 14
Communication is performed via 0 so that the control microcomputer 101 obtains the detection result of the safety sensor 122 of the master unit 120.

Then, the in-vehicle disc exchange device 110
Forms a control command for exchanging and reproducing a video CD according to an operation input to each unit of the exchange device 110, supplies the control command to each unit, and, based on the detection result from the safety sensor 122 of the master unit 120, the vehicle concerned. Detects whether the vehicle is running.

Each unit which receives the supply of the control command from the control microcomputer 101 operates so as to exchange and reproduce the disc. Then, when the control microcomputer 101 detects that the automobile is running, the control microcomputer 101, as in the case of the first embodiment, transmits the T of the disk supplied from the servo and signal common processing unit 103.
The type of the disc to be played back is determined from the OC information.

Based on the disc type discrimination result, the control microcomputer 101 controls so as to perform the process corresponding to the disc type discriminated among the above-mentioned discs.

In this case, the video CD is exchanged and reproduced. Therefore, the control in the case described above is performed, and when the detection result from the safety sensor 122 indicates that the vehicle is running, the control microcomputer 101 determines that the video signal processing circuit 105
Is controlled so that the moving image by the video signal from the video CD being reproduced is not displayed. When the detection result of the safety sensor 122 indicates that the automobile is stopped, the video signal from the video CD is
For example, it is supplied to the display of the master unit 130 via the video signal processing circuit 105 so that a moving image can be displayed.

In this way, when the video CD is exchanged and reproduced in the vehicle-mounted disc exchanging device 110 in response to the exchange and reproduction requests from the master unit 130 having no safety sensor, the master unit 120 is replaced.
The in-vehicle disk exchange device 110 obtains the detection result of the safety sensor 122 of 1., so that the exchange device 110 can operate the safety compensation function of its own device.

Therefore, it is not necessary to connect the detection circuit 106 as a safety sensor of the exchange device 110 to the switch SWp which is interlocked with the on / off state of the parking brake of the automobile, and the exchange device 110 can be mounted and connected to the automobile. It can be done easily.

Incidentally, also in the second embodiment,
When the safety compensation function is activated, it is the video signal that is controlled and the audio signal is played normally.

UAR which can be used for general purpose
Since the master unit and the vehicle-mounted disc exchange device can be connected via the T circuit, even if the master unit and the vehicle-mounted disc exchange device 110 of different manufacturers are connected, information can be exchanged smoothly. The types of master units that can be connected to the vehicle-mounted disk exchange device 110 are increased, and the vehicle-mounted system can be more flexibly formed.

In the vehicle-mounted systems of the first and second embodiments, as described above, the disc type for the disc, the output control of the video signal, and the presence / absence of the connection of the navigation device are discriminated by the vehicle-mounted disc. Switching device 10, 110
Since it is performed by the control microcomputers 1 and 101, the error due to the manual operation of the operator does not occur, and the safety compensation function can be fully utilized. Therefore, even when the vehicle-mounted disc exchange device obtains the detection result of the safety sensor of the navigation device which is the master unit, the vehicle-mounted disc exchange device surely obtains the detection result from the safety sensor of the navigation device. be able to.

As described above, in the master unit device having the safety compensating function, when the video signal is supplied from the on-vehicle disc exchanging device, the safety compensating function operates on the master unit device side. However, even for the master unit device having the safety sensor and the safety compensation function, the safety function is operated in the in-vehicle disc exchange device to supply the safety-compensated video signal. You can also

Next, the safety compensating function according to the type of the disc being reproduced, which is carried out by the control microcomputer 101 of the vehicle-mounted disc exchanging device 110 of the second embodiment, will be described with reference to the flowcharts of FIGS. 4 and 5. It will be explained with reference to FIG.

In an automobile equipped with an in-vehicle system including the above-described in-vehicle disk exchange device 110, the safety sensor 1 of the master unit 120, which is a navigation device, is supplied while the power supply voltage is supplied to the in-vehicle system.
22 constantly monitors whether or not the vehicle is running.

The detection result from the safety sensor 122 is notified to the control microcomputer 101 of the in-vehicle disk exchange device,
The control microcomputer 101 recognizes whether or not the current vehicle is running.

When the vehicle equipped with this on-vehicle system stops and the vehicle starts running while the disk is being played back, or when the disk playback is started during running, the control microcomputer 101 The safety compensation routine shown in FIGS. 4 and 5 is read out and executed.

When the safety compensation routine is executed, first, the disc being played back is a music CD (CD-DA or C
DG) is determined (step S1). When it is determined that the disc is a music CD in the determination process of step S1, it is determined whether the disc being reproduced is a CD-G (step S2).

When it is determined in the determination process of step S2 that the disc being reproduced is a CD-G, the graphic image reproduced from the CD-G is output as a still image using the screen still function, or Characters or the like indicating the type of the disc are displayed with the background being a blue background, and a moving image is not displayed. At this time, the sound is reproduced as usual (step S4).

In the judgment processing of step S2, CD-
When it is determined that the disc is not G, the disc being played is C
It is determined to be D-DA. This CD-DA is a general music CD and does not provide images. Therefore, the sound is reproduced as usual (step S3).

Further, in the judgment processing of step S1,
When it is determined that the disc being reproduced is not a music CD, it is determined whether the disc being reproduced is a CD-ROM (step S5). In the determination process of step S5,
When it is determined that the disc being reproduced is a CD-ROM, the disc being reproduced is a C for navigation device.
It is determined whether or not it is a D-ROM (step S6).

When it is judged in the judgment processing of step S6 that the CD-ROM is for a navigation device, the normal reproduction processing is carried out (step S8). However, control such as not scrolling the displayed map is performed by the navigation device 120.

Further, in the judgment processing of step S6,
When it is determined that it is not a navigation device CD-ROM, it is determined to be a normal CD-ROM, when it is a still image, it is output as it is, and when the recorded data is a moving image, rewriting of the video memory is prohibited. To make a screen still or blue background.
Further, in this case, the in-vehicle disk exchange device side controls so as not to scroll the image (step S7).

In the processing of steps S7 and S8, the sound is reproduced as usual in either case.

When it is judged in the judgment processing of step S5 that the disc being reproduced is not a CD-ROM, it is judged whether the disc being reproduced is a video CD (step S9). If it is determined in step S9 that the disc is a video CD, the disc being played is
It is determined whether the version of the video CD is 2.0 (step S11).

When it is judged in the judgment processing of step S11 that the version of the video CD is not 2.0, it is judged that the video CD is a normal video CD, and the still image is output by using the screen still function, or the background image is output. Is displayed as a blue background to display characters or characters that indicate the type of disc being played so that the movie is not played.
The sound is reproduced as usual (step S12).

When it is judged in the judgment processing of step S11 that the disc being reproduced is the version 2.0 of the video CD, the reproduction of the still picture information is executed as usual, but the reproduction of the moving picture information is carried out. , The moving image is not reproduced by using the screen still or the blue background, and the sound is reproduced as usual (step S13).

A video CD and a disc of version 2.0 can record a moving image and a still image in a mixed manner. As described above, only the still image is displayed and the moving image is not displayed. Can be controlled to limit some of the features of Video CD version 2.0, such as.

If it is determined in step S9 that the disc being reproduced is not a video CD,
The disc being played is a music CD, CD-G, CD-RO.
It means that it is neither M nor a video CD, and cannot be played. Therefore, in step S10, error processing such as displaying an error message is executed.

As described above, in the vehicle-mounted disc exchanging device 110 according to the second embodiment, the vehicle equipped with the exchanging device 110 runs in response to the detection result of the safety sensor of the navigation device 120 as the master unit. If it is detected as being in progress, depending on the disc type,
Activate the safety compensation function.

As described above, according to the first and second embodiments, the necessary safety compensating function processing is carried out on the side of the vehicle-mounted disc exchange apparatus, so that the vehicle-mounted disc exchange apparatus performs safety compensation. The video signal whose output is controlled by the function can be supplied to the master unit. Therefore, it is not necessary for the master unit side connected to the on-vehicle disc exchanging device to consider the safety compensation function for the video signal from the on-vehicle disc exchanging device.

[Example of Configuration of In-Vehicle System] Next, an example of connection of the in-vehicle system configured by using the in-vehicle disk exchange device of the above-described embodiment will be described.

6 and 7 show a vehicle-mounted disc exchange device 2
00 has a safety sensor connected to a switch SWp that operates so as to interlock with a parking brake of an automobile, and operates a safety compensation function in a vehicle-mounted disc exchange device according to a detection result of the safety sensor and a disc type. It is an example of connection of an in-vehicle system when it is made to do. While power is supplied to the in-vehicle system shown in FIGS. 6 and 7, the safety sensor constantly monitors whether or not the vehicle is running.

In the case of FIG. 6, the master unit 201
Is a player for video CDs and CD-Gs. The master unit 201 is connected to the exchange device 200 by a bus line 301 and an audio line 302. Then, the transmission and reception of control commands and the like are performed by the bus line 30
The audio signal of the switching device 200 is supplied to the master unit 201 via the audio line 302.

The television receiver 202 is a so-called on-vehicle small-sized one, and is equipped with a display such as an LCD. The television receiver 202 is connected to the exchange apparatus 200 via the video line 303, and the video signal from the exchange apparatus 200 is transferred to the video line 303.
It is designed to be supplied via.

In the case of the example shown in FIG. 6, the disk exchange / playback instruction from the master unit 201 is supplied to the exchange apparatus 200 via the bus line 301, and accordingly, the exchange apparatus 200 responds. , Video CD, CD-
Discs such as G can be exchanged and reproduced.

Then, in the case of exchanging or reproducing the disc loaded in the exchanging device 200 in accordance with the disc exchange of the video CD or the CD-G from the master unit 201 or the reproduction instruction, or when the reproduction is already performed. Has
Based on the detection result of the safety sensor of the exchange device 200, the exchange device 200 detects whether or not the vehicle equipped with the in-vehicle system is running. Then, when the vehicle is running and a disc providing image information such as a video CD or a CD-G is played back, the exchange device 20
At 0, the safety compensation function is operated to control the output of the video signal supplied to the television receiver 202 so that the moving image is not displayed.

As described above, the video signal from the switching device 200 supplied to the television receiver 202 is transmitted to the switching device 20.
It is a video signal that has been controlled by the safety compensation function on the 0 side,
On the television receiver 202 side, it is not necessary to perform a process for safety compensation on the video signal from the exchange device 200.

In the case of the on-vehicle system shown in FIG. 6, the output of the TV program image received and selected by the TV receiver 202 is usually controlled by the safety compensation function on the TV receiver 202 side. It

In the case of FIG. 7, the master unit 201
Is a player for video CDs and CD-Gs. The master unit 201 is connected to the television tuner 203 by a bus line 301a and an audio line 302a. The TV tuner 203 receives and selects a TV broadcast. The television tuner 203 is connected to the monitor device 204 by a video line 303a. In addition, the television tuner 203 in this case has a safety sensor formed by an acceleration sensor or the like, and has a safety compensation function that does not display the moving image of the received and selected television program while the vehicle is running. ing.

The television tuner 203 is connected to the exchange apparatus 200 by a bus line 301b, an audio line 302b and a video line 303b.

When a disc exchange / playback instruction is given from the master unit 201, a control command corresponding to the instruction is sent to the exchange apparatus 200 via the bus line 301a, the television tuner 203, and the bus line 301b. Supplied. At this time, when the control command is for exchanging and reproducing the video CD or CD-G, the television tuner 203 supplies the video signal from the exchanging device 200 to the monitor device 204,
The audio signal from the switching device 200 is prepared to be supplied to the master unit 201.

When the video CD or the CD-G is reproduced, the exchange apparatus 200 detects whether or not the automobile is running based on the detection result of the safety sensor of the exchange apparatus 200 and is reproducing the vehicle. Discs are video CDs, CD-Gs
In such a case, the safety compensation function is operated to control the video signal supplied to the monitor device 204 via the television tuner 203 so that the moving image is not reproduced.

Therefore, in the case of this example, since the video signal from the switching device 200 is controlled by the safety compensation function of the switching device 200, the safety compensation for the video signal from the switching device 200 is performed on the TV tuner side. There is no need to perform the processing of.

By sending the detection result of the safety sensor of the television tuner 203 to the exchange device 200, the safety compensation function operates on the exchange device 200 side without using the safety sensor of the exchange device 200. You can also

Further, in the case of FIG. 7, regarding the image of the television program received and selected by the television tuner 203,
This is processed by the safety compensation function of the TV tuner 203, and when the vehicle equipped with the in-vehicle system of this example is running, the moving image is controlled not to be displayed.

As described above, in the case of the in-vehicle system connected as shown in FIGS. 6 and 7, it is detected whether or not the vehicle is running on the side of the in-vehicle disk exchanging device 200, and this detection result is used. Thus, in order to operate the safety compensation function, it is not necessary to consider the safety compensation function for the video signal from the switching device 200 in other devices connected to the switching device 200.

FIG. 8 and FIG. 9 show the case where the safety compensation function of the on-vehicle disc exchange device is operated upon receipt of the notification of the detection result of the safety sensor from the master unit including the safety sensor, for example, the navigation device. It is a connection example. Therefore, the in-vehicle disc exchange device 400 of FIGS. 8 and 9 includes a safety sensor of a type that is connected to a switch that operates in conjunction with the parking brake.
It need not be used.

In the case of FIGS. 8 and 9, navigation devices 401 and 403 are connected to the vehicle-mounted disc exchange device 400 as master units. Each of the navigation devices 401 and 403 has a CD-ROM reproduction processing unit, and can reproduce the CD-ROM by itself. In addition, the navigation devices 401 and 403
Is equipped with a safety sensor and monitors whether or not the vehicle is running while the vehicle-mounted system shown in FIGS. 8 and 9 is being supplied with power.
In, the safety compensation function can be operated. Further, the in-vehicle disc exchange device 400 can reproduce a plurality of types of discs such as a video CD, a CD-G, a CD-ROM.

In the case of FIG. 8, the navigation device 40
1 is connected to the exchange apparatus 400 by a bus line 501. Further, the navigation device 401 is provided with an input terminal Vi for a video signal and an audio signal, and the video signal and the audio signal from the exchange device 400 are supplied via the video and audio line 502. Further, the navigation device 401 has output terminals Vo for video signals and audio signals, and the television receiver 402 is connected to these output terminals and the video and audio lines 503.

As a result, the television receiver 402 can output an image and sound according to the video signal and the audio signal from the navigation device 401.

The disk exchanging device 400 has the bus line 5
The detection result of the safety sensor of the navigation device 401 is received via 01, and based on the detection result of the safety sensor of the navigation device 401, it is detected whether or not the vehicle in which the system is mounted is traveling. If the detection result indicates that the automobile is running, the exchange device 40
At 0, the safety compensation function operates according to the disc type.

As described above, since the safety compensating function can be operated in the exchange device 400 based on the detection result of the safety sensor of the navigation device 401, the video signal from the disc reproduced in the exchange device 400 can also be operated. , Can be controlled by the safety compensation function. Moreover, since it is not necessary to connect the safety sensor of the exchange device 400 to the parking brake of the vehicle, the exchange device can be easily mounted and connected.

Further, the navigation device 401 can use the safety compensation function of its own device when reproducing the CD-ROM in its own device. Therefore, the in-vehicle disc exchange device 400 and the navigation device 4
No matter which side of 01 the disc is played, the safety compensation function can be operated.

When the navigation device 401 can reproduce a video CD or a CD-G, the safety compensation function of the navigation device 401 is used to perform safety compensation.

In the case of FIG. 9, the navigation device 40
3 includes an input terminal Vi for video signals and audio signals, an output terminal Vo for video signals and audio signals, and an external input terminal Ex. The external input terminal Ex has
A TV tuner 404 is connected. The video and audio line 5 is connected to the output terminal Vo of the navigation device 403 for the video and audio signals.
The monitor device 405 is connected by 06.

The navigation device 403 and the exchange device 400 are connected to the bus line 50 in the same manner as in FIG.
1 and video and audio lines 502. When an image is displayed on the monitor device 405 by the video signal from the exchange device 400, the detection result of the safety sensor of the navigation device 403 is supplied as in the example of FIG. 8 described above. Received by. According to the detection result and the type of disk, the safety compensation function operates in the exchange device 400,
Output controlled video signal is video and audio line 5
02 and the navigation device 403, and is supplied to the monitor device 405.

Therefore, in the case of the in-vehicle system of FIG. 9, as in the case of FIG. 8, in the exchange device 400, according to the detection result of the safety sensor of the navigation device 403,
The safety compensation function can be activated to control the video signal supplied to the monitor device 405 via the navigation device 403.

Further, the safety sensor of the exchange device 400 does not have to be connected to the automobile.

When the navigation device 403 selects the TV tuner 404, the TV tuner 4
If 04 has a safety compensation function, the safety compensation function may be operated in the television tuner 404. The compensation function may be used to control the video signal from the TV tuner 404.

As described above, the vehicle-mounted disk exchange device 20
No. 0,400 can operate safety compensation properly and surely when a disc is played back, regardless of which device is combined to form an in-vehicle system. If the master unit to be connected has a safety compensation function, the detection result from the safety sensor of the master unit is sent to the in-vehicle disk exchange device to notify the in-vehicle disk exchange device of the safety sensor. Need not be connected to the car.

The configuration example of the in-vehicle system using the above-described in-vehicle disk exchange device is not limited to the case shown in FIGS. 6 to 9, and other configurations are possible.

The on-vehicle system of the first and second embodiments and the on-vehicle system shown in FIGS. 6 to 9 are:
Although the master unit and the in-vehicle disk exchange device are connected via the bus line, it is also possible to perform signal communication between them by wireless communication.

[0140]

As described above, according to the on-vehicle disc exchanging device of the present invention, when a disc is reproduced in an automobile equipped with the in-vehicle disc exchanging device of the present invention, the automobile is in a running state. in case of,
It is possible to secure safety without displaying moving images.

When connecting to a master unit having a safety compensating function, the safety sensor of the in-vehicle disk exchange device according to the present invention is mounted by obtaining the detection result of the safety sensor of the master unit. It is not necessary to connect to the parking brake of the automobile, and the mounting and connection of the vehicle-mounted disc exchange device according to the present invention can be facilitated.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an embodiment of an in-vehicle disk exchange device according to the present invention.

FIG. 2 is a block diagram for explaining another embodiment of the vehicle-mounted disk exchange device according to the present invention.

FIG. 3 is a diagram for explaining an example of an asynchronous communication system.

FIG. 4 is a flow chart for explaining the operation of the vehicle-mounted disc exchange device according to the present invention.

FIG. 5 is a flowchart following FIG. 4;

FIG. 6 is a diagram for explaining a configuration example of an in-vehicle system configured by using the in-vehicle disc exchanging device according to an embodiment of the in-vehicle disc exchanging device according to the present invention.

FIG. 7 is a diagram for explaining a configuration example of an in-vehicle system configured by using the in-vehicle disc exchanging device according to an embodiment of the in-vehicle disc exchanging device according to the present invention.

FIG. 8 is a diagram for explaining a configuration example of an in-vehicle system configured by using the in-vehicle disc exchanging device according to an embodiment of the in-vehicle disc exchanging device according to the present invention.

FIG. 9 is a diagram for explaining a configuration example of an in-vehicle system configured by using the in-vehicle disc exchanging device according to an embodiment of the in-vehicle disc exchanging device according to the present invention.

[Explanation of symbols]

 10,110 In-vehicle disk exchange device 1,101 Control microcomputer 2,102 Mechanical deck driver 3,103 Servo and common signal processing circuit 4,104 Audio signal processing circuit 5,105 Video signal processing circuit 6,106 Detection circuit (safety sensor) 11,111 Communication interface 12,112 Communication interface 113 UART circuit 20,120 Master unit 21,121 Control microcomputer 30,130 Master unit 31,131 Control microcomputer 122 Safety sensor

[Procedure amendment]

[Submission date] December 22, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0072

[Correction method] Change

[Correction contents]

In this example, the navigation device 120 has a video input terminal (not shown), and the video output signal from the disk exchanging device 110 is input to this video input terminal. If the user has instructed to utilize a disk changer 110 from the operation panel of the navigation device 120 performs navigation by the video signal of the video input jack or al, maps and the like are displayed. In the case of this example, safe compensation function for the video input jack or these video signals,
It is configured to execute on the navigation device 120.

Claims (2)

[Claims] Claim: What is claimed is: 1. An in-vehicle disc exchanging device for exchanging a disc and reproducing a signal from the disc in response to a control signal from a master unit which receives a user's operation input. On the other hand, a common signal processing circuit, a video signal processing circuit that receives a signal from the common signal processing circuit and forms a video output signal, and whether or not a vehicle equipped with an in-vehicle disc exchange device is running. And a control unit, and a determination unit that determines the type of the disc that is being reproduced. The control unit controls the detection result from the detection unit and the type of the disc from the determination unit. A vehicle-mounted disc characterized by controlling the video signal processing circuit according to the discrimination output to control the video signal output obtained from the disc being reproduced. Disk replacement device. 2. A means for receiving a detection result from the master unit side as to whether or not a vehicle equipped with the vehicle-mounted disk exchange device is running, the control means comprising the received detection result and the discrimination result. 2. The in-vehicle disc exchange device according to claim 1, wherein the video signal output obtained from the disc being reproduced is controlled according to the discriminating output of the disc type from the means.