JPH08329591A - On-vehicle disk exchange device - Google Patents

Abstract

PURPOSE: To provide an on-vehicle disk exchange device capable of performing disk reproduction and disk exchange by two kinds of master units in which communication systems and types of commands are different from each other, and two kinds of remote control instructions with different category codes. CONSTITUTION: A first communication interface 11 to transfer and receive a control signal to and from a first master unit 20 and a second communication interface 12 to transfer and receive a control signal to and from a second master unit 30 of which a communication system and a control command type are different from those of the first master unit, are provided. A control part 1 is provided which generates or receives a control signal through the first and second communication interfaces and controls the whole system. The control part 1 discriminates the kind of disk under reproduction, and decides a priority of the pertinent control command depending on from which master unit the control command is issued, the first one or the second one, and executes a processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a plurality of discs such as CDs (compact discs) and selects and reproduces the discs according to a control command from a master unit. Regarding

[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 in 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 current position of the own vehicle is recorded on the map information-a method of using a GPS system for measuring using a satellite, an angular velocity of a piezoelectric vibration gyro or the like. There is a method of calculating a traveling direction and a traveling distance by using a sensor, and the like.

[0007]

With the widespread use of the above-mentioned automobile navigation device (hereinafter, simply referred to as a navigation device), there is an increasing demand for combining this automobile navigation device with an existing car audio system. There is. In this case, if a plurality of discs such as a navigation CD-ROM or a CD-G can be automatically replaced and used as display data,
It is very convenient because it is easy to use and various features can be realized.

However, conventionally, the connection between the on-vehicle disc exchanging device and the navigation device is not assumed, and the navigation device is not the master unit of the conventional on-vehicle disc exchanging device. That is, the communication method and control command format of the navigation device are generally different from those of the component devices of the existing car audio system.

For this reason, the bus line for control command communication provided in the conventional vehicle-mounted disk exchange device cannot be used for connection with the navigation device.

Therefore, the car navigation system cannot be easily combined with the conventional audio system incorporating the on-vehicle disc exchanging system.
There were many restrictions, such as the need to add accessory parts and the inability to use some of the existing systems.

There is also a changer type of this navigation device capable of automatically exchanging and reproducing a plurality of CD-ROMs. In this case, however, the disc exchanging device portion is the navigation system. It is built into the device and is, so to speak, part of the master unit.

In view of the above points, the present invention makes it easy to use a car audio system having a communication system and a control command different from those of the car audio system, such as the navigation device described above. It is an object of the present invention to provide an in-vehicle disc exchange device devised so that it can be incorporated into a disc.

[0013]

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 a vehicle-mounted disc exchange device for performing reproduction, a first communication interface for exchanging control signals with a first master unit, and a communication method and a control command format with the first master unit. A second communication interface for transmitting and receiving a control signal to and from a second master unit different from each other, and generating a control signal via the first and second communication interfaces,
Alternatively, a control unit for receiving and controlling the entire apparatus is provided, wherein the control unit determines from the discriminating means discriminating the type of the disc being selected or being reproduced, and the first master unit or the second master unit. And a decoding unit for decoding the control command, and a unit for determining the priority of the control command decoded by the decoding unit based on the information from the determining unit and the decoding unit.

The first communication interface may be a synchronous communication interface, and the second communication interface may be an asynchronous communication interface.

[0015]

According to the on-vehicle disk exchanging device having the above-described structure, the first communication interface is equipped with, for example, a synchronous communication system capable of communicating with the devices of the components of the car audio system, On the other hand, as the second communication interface, for example, UART (Universal Asynchronous Receiver / Transmit) generally used in serial data communication between microcomputers.
It is possible to install a communication interface of asynchronous communication method called ter).

Therefore, for example, the navigation device has a UART as an example of the second communication interface.
The interface makes it possible to connect.
Then, when the received control command is decoded, the discriminating unit discriminates the type of the disc currently being selected or being reproduced, the priority thereof is determined, and the control command is executed in accordance with the determination. Control non-execution.

Therefore, even if a plurality of master units are connected and control commands come from each,
Since the control command always has priority, malfunction can be prevented, and when it is better not to change the state of the system, it is appropriately processed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an on-vehicle disc exchanging device according to the present invention will be described below with reference to the drawings. 1 and 2 are block diagrams for explaining an example of an in-vehicle system to which the in-vehicle disk exchange device of this example is applied.

To the in-vehicle disk exchange apparatus 10 of this example, two master units 20 and 30 having different communication systems and control command formats are connected by bus lines 40 and 50. In this example, the master unit 20 is a navigation device, 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.

As shown in FIG. 2, the master unit 2
The batteries of the automobile are supplied to 0 and 30 as a power source, and the power source of the vehicle-mounted disc exchanging device 10 is supplied through these master units 20 and 30. Therefore, the bus lines 40 and 50 shown in FIGS. 1 and 2 include not only the control command communication lines 41 and 51, but also the power supply lines 42 and 52. Further, as will be described later, between the master unit 30 and the bus line 50,
A remote control command line 53 is also included.

As shown in FIG. 1, a vehicle-mounted disk exchanging device 10 of this example has a control microcomputer (hereinafter referred to as a control microcomputer) 1 for controlling the entire device 10.
A mechanical deck driver 2, a servo and signal common processing unit 3, an audio signal processing circuit 4, a video signal processing circuit 5, a stabilizing power supply circuit 6, communication bus interfaces 11 and 12, a UART circuit 13, The power source changeover switch 14 is provided.

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 and signal common processing section 3 includes a spindle motor for rotating the disk, a biaxial actuator for moving the optical pickup in the radial direction of the disk, and performs tracking servo, focus servo and spindle servo. In addition to a servo circuit for performing the same, a circuit portion for performing common signal processing on the reproduced signal such as a reproduced RF signal processing circuit and an error correction decoding processing circuit is provided.

The servo / signal common processing section 3 includes:
A servo control signal is supplied from the control microcomputer 1 and, for example, 9V for the motor is supplied from the stabilized power supply circuit 6.
For example, 5V is supplied as a power supply for the signal processing circuit.
Then, digital audio data or digital video data is obtained from the servo / signal common processing unit 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 on the basis of a 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 signal is supplied to a display monitor device (not shown), or as described later,
When the navigation device is connected as a master unit, it is supplied to the navigation device, and the image based on the video output signal is displayed on a display such as an LCD mounted on the navigation device.

When the CD-G is reproduced, the display for display of the navigation device can be used for monitoring the graphic image.

The stabilized power supply circuit 6 includes the master unit 2
Power supply voltage is supplied from 0 and 30 through power supply lines 42 and 52 in bus lines 40 and 50. Then, the stabilized power supply voltages of 9 V and 5 V described above are formed and supplied to each part.

By the way, the master unit 20 composed of the navigation device often has problems of noise and unnecessary radiation because it is provided with an image processing section. Therefore, in the case of this example, when both the master unit 20 and the master unit 30 are connected to the in-vehicle disk exchange device 10, the control microcomputer 1 detects the connection and controls the switch 14 to be turned off. , Master unit 3
Only the power from the 0 side is used to supply the stabilized power supply circuit 6. Details of the control contents will be described later.

The communication interface 11 is an asynchronous communication interface in this example. That is, the master unit 20 and the in-vehicle disc exchange device 1
Communication with 0 is performed in an asynchronous manner 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, has become "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, serial / parallel conversion of data is performed by the widely used UART circuit 13. Parallel data communication is performed between the UART circuit 13 and the control microcomputer 1. Therefore, in order to decode the control command, an expensive dedicated decoder is not required, and an inexpensive general-purpose UART chip may be provided in the vehicle-mounted disk exchange device 10, and the device can be configured at low cost.

As described above, the start-stop synchronization method is generally used for communication between microcomputers, has high versatility, and enables communication with the control microcomputer 21 of the navigation device 20 described later.

On the other hand, the communication interface 12 uses 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.

As shown in FIG. 2, the master unit 20 composed of the navigation device and the master unit 30 composed of the audio equipment have substantially the same structure in the parts related to the communication with the on-vehicle disk exchange device 10. Have.

That is, the master unit 20 has a control microcomputer 21 for exchanging control commands with the exchange device 10, a stabilizing power supply circuit 22, and a light receiving section 23 for receiving a remote control signal from a remote commander.
The display device 24 is, for example, an LCD. Similarly, the master unit 30 includes a control microcomputer 31 for exchanging control commands with the exchange device 10, a stabilizing power supply circuit 32, and a light receiving section 33 for receiving a remote control signal from a remote commander. Although not shown, a display device such as an LCD may be provided, if necessary. It should be noted that, in FIG. 2, parts not related to communication are omitted.

Control microcomputer 21 of master unit 20
Discriminates a user's operation input from the operation unit 25, generates a control command, and when the command is to be transferred to the in-vehicle disk exchange device 10, sends it to the exchange device 10.

Further, in the case of this example, the control microcomputer 21 of the master unit 20 receives not only the remote commander 61 for its own device but also the remote commander 62 for the audio equipment (master unit 30) having different category codes. It has a function of decoding a control command, and if the infrared remote control command from the remote commander 61 or the remote commander 62 received by the light receiving section 23 is to be decoded and transferred to the exchange device 10, it is described above. It is sent to the exchange 10 via the asynchronous communication bus line 41.

The master unit 20 is supplied with a DC power supply voltage of, for example, 14.4 V from the automobile battery to the stabilized power supply circuit 22, and as described above, the power supply line 42 which is a part of the bus line 40. The power supply voltage is supplied to the in-vehicle disk exchange device 10 via the. The stabilized power supply circuit 22 generates a stabilized DC power supply voltage of 5 V, for example, and supplies it to the control microcomputer 21 of the master unit 20 and others.

The display device 2 of the master unit 20
Reference numeral 4 is for displaying a map for navigation and one's own position, and has a relatively large screen. As mentioned above, despite the control command being input,
The display device 24 is also used as a caution display when it is not executed.

Control microcomputer 31 of master unit 30
Discriminates the user's operation key input from the operation key input unit 35 and generates a control command, which is the exchange device 10.
If it is to be transferred to the switching device 10, it is sent to the switching device 10. Further, as described above, the infrared remote control commands from the two remote commanders 61 and 62 having different category codes are received by the light receiving section 33, and those which can be decoded are decoded and supplied to necessary sections.

Further, since the control microcomputer 31 of the master unit 30 of this example does not have a function of decoding all commands, the infrared remote control command received by the light receiving section 33 is added to the above-mentioned synchronous communication line 51. It is sent to the in-vehicle disc exchange device 10 via the remote-control command communication line 53 installed.

As a result, even for control commands that cannot be decoded by the control microcomputer 31 of the master unit 30, the remote commander 61 or 62 can directly control the in-vehicle disk exchange device 10.

With the above configuration, the master unit 20
When only one is connected to the in-vehicle disk exchange device 10 via the bus line 40, the connection is detected by the control microcomputer 1 by monitoring the communication line 41, for example. The communication line 41 is used as means for detecting that the master unit 20 is connected to the device 10.
A sensor for detecting the fact that it is connected to the connector when it is connected to the connector is provided, and it is detected by the output of the sensor or the fact that the power supply line 42 becomes high level is detected. Various methods such as detection can be used. Whichever method you use,
The connection detection signal is supplied to the control microcomputer 1 to inform it. In this case, power is supplied to the in-vehicle disk exchange device 10 via the power line 42.

Asynchronous communication using the above-mentioned UART circuit 13 is performed between the control microcomputer 21 and the control microcomputer 1, and the CD-RO for the navigation device is used.
M or CD-G is reproduced, a necessary video output signal is supplied to the master unit 20, and a navigation function is realized. The audio signal is reproduced by the speaker. In this case, the in-vehicle disc exchange device 10 of this example also operates as a CD-ROM changer.

When only the master unit 30 is connected to the on-vehicle disk exchanging device 10 via the bus line 50, the connection is made by monitoring the communication line 51 as in the above. It is detected by the control microcomputer 1. Then, power is supplied to the in-vehicle disk exchange device 10 via the power supply line 52.

Then, the above-described synchronous communication is performed between the control microcomputer 31 and the control microcomputer 1 to reproduce the CD or CD-G, and the audio signal is reproduced by the speaker to reproduce the CD-G. Is displayed on the screen of the monitor device, and the in-vehicle disc exchange device 10 of this example operates as a CD changer similar to the conventional one.

In this case, as described above, when a remote control signal that cannot be decoded by the control microcomputer 31 is input to the remote commander 61 or 62, the control microcomputer 1 directly receives this remote control command signal through the communication line 53. Then, it decodes and performs corresponding control.

Further, the master units 20 and 30 can be simultaneously connected to the vehicle-mounted disc exchange device 10. In that case, the connection of both of the two master units 20 and 30 is detected and the connection is confirmed by the method as described above, and the control commands from the respective units make the operation possible. When the control microcomputer 1 detects that both are connected, the control microcomputer 1 turns off the switch 14 and the in-vehicle disk exchange device 10
The power source of is only obtained from the master unit 30 side.

Therefore, when the two master units are connected, the power supply source is fixed to one of the master units. Therefore, in this example, unnecessary radiation or electricity generated in the master unit 20 which is the navigation device is generated. Noise and the like are prevented from entering through the power supply line 42, and the noise characteristic is improved.

As will be described in detail below, when the two master units 20 and 30 are connected to the vehicle-mounted disk exchanging device 10 as described above, the operation can be performed by the control command from each. As described above, the presence / absence of connection is confirmed when the bus communication is started.
After that, the control microcomputer 1 executes each processing while monitoring the command input in the processing procedure as shown in FIG.

In this example, the remote control command signal is monitored in the main routine. Each master unit 20
Alternatively, command input from 30 is monitored by a timer interrupt. When a command input is detected, a command input waiting time is set so that the input of the next command is not accepted during the waiting time and the immediately following input command is not executed, and then the command processing is performed.

Further, in the case of this example, the control commands other than those from the master unit 20 which is the navigation device have a high priority when the disc being reproduced in the exchange device 10 is the navigation CD-ROM. do it,
Do not process any command other than disk selection command. Further, the command from the master unit 20 is executed after the condition determination.

The flowchart 100 of FIG. 4 shows the main part of the main routine. As shown in FIG. 4, it is determined in step S1 of this routine whether or not a remote control command signal is input. This main routine is
For example, since it is executed at intervals of 2 to 3 msec, the input of the remote control command signal is monitored at this time interval.

If there is no remote control command signal input in step S1, other processing of this main routine is further executed and this routine 100 is ended.

When it is determined in step S1 that the remote control command signal has been input, the process proceeds to step S2, and as described above, the command input waiting time is set so that the command input immediately after is not executed. In step S3, the determined command processing (this processing is called command processing (A)) is performed. This command processing (A) is as shown in FIG. 6, and its explanation will be described later.

Next, the flowchart 200 of FIG. 5 is a command monitoring routine by a timer interrupt.
That is, when the timer interrupt is applied in step S10, it is first determined in step S11 whether or not a command is input from the master unit 20.

In this step S11, the master unit 2
When it is detected that the command is input from 0, the process proceeds to step S12, the command input waiting time is set in the same manner as described above, and then the process proceeds to step S13 to process the detected input command. This command processing (this processing is called command processing C) is shown in FIG.

When it is determined in step S11 that there is no command input from the master unit 20, the process proceeds to step 14 and it is determined whether or not there is a command input from the master unit 30.

In this step S14, the master unit 3
When it is detected that the command is input from 0, the process proceeds to step S15, the command input waiting time is set in the same manner as described above, and then the process proceeds to step S16 to process the detected input command. This command processing (this processing is called command processing B) is the same as the command processing (A) in step S3, as shown in FIG.

When it is determined in step S14 that no command has been input from the master unit 30, the interrupt processing routine 200 ends. The command monitoring routine 200 by this timer is, for example, several hundred μ
It is executed every sec.

A flowchart 300 of FIG. 6 is a processing routine of command processing A and command processing B. That is, first, in step S21, it is determined whether or not the reproduction disk is a navigation CD-ROM. If the reproduction disc is a navigation CD-ROM, the process proceeds to step S22, and it is determined whether or not the access is a direct disc instructing disc selection. If it is a direct disk access, step S
In step 23, a disk selection command process is executed.
That is, the direct disk access command for instructing disk selection has the highest priority. Then, the process returns to the main routine 100.

If it is determined in step 22 that the direct disk is not accessed, the process proceeds to step S24, the command processing is stopped, and the process proceeds to step S25.
The master unit 20 is instructed to display on the display device 24 that the command processing has been stopped. Then, the process returns to the main routine 100.

When it is determined in step S21 that the reproduction disc is not the navigation CD-ROM,
In step S26, the disc type is determined from the disc TOC.

Next, in step S27 and the subsequent steps, the control command branches after performing the condition determination and executes the respective processes. That is, for example, if the control command 1 is determined in step 27, the process proceeds to step S28 to process the control command 1, and if it is not the control command 1, the process proceeds to the next step, which is the control command 2. If it is the control command 2, the control command 2 is executed. If it is not the control command 2, the process proceeds to the next step and it is determined whether it is the control command 3 ...
As described above, each control command is processed by conditional branching. After the processing, the process returns to the main routine 100.

The flowchart 400 of FIG. 7 is an example of the processing routine of the command processing (C). This is exactly the same as step 27 onward in FIG. 6, and the command processing is performed by conditional branching by the control command. That is, if it is determined in step S31 that the command is the control command 1, the process proceeds to step S32, the control command 1 is processed, and if the command is not the control command 1, the process proceeds to the next step and is the control command 2? If it is not the control command 2, the control command 2 is executed. If it is not the control command 2, the process proceeds to the next step to determine whether it is the control command 3, and so on. , Conditional branch and process each control command. After processing, main routine 10
Return to 0.

As described above, according to the vehicle-mounted disc exchanging device of the above-mentioned embodiment, the navigation device can be used as the master unit. In that case, it is not necessary to add an accessory as in the conventional case.

Therefore, when constructing a car audio system, this vehicle-mounted disc exchange device is used as a CD / C.
If you install it as a D-ROM changer in advance,
At any time later, a navigation device can be added to the car audio system to upgrade the system.

Also, the video output and audio output of the in-vehicle disk exchange device of this example are converted into FM signals by using an RF modulator so that they can be received by the tuner of the car audio system. It is possible to upgrade the navigation device to the so-called genuine car audio system.

Further, in that case, by further expanding the function so that the control microcomputer of the vehicle-mounted disk exchange device is equipped with the decoding function of the control command for the genuine master unit, Both the genuine system and other systems can be supported with only the control microcomputer of the disk exchange device.

[0074]

As described above, according to the present invention, a vehicle-mounted disk exchange device capable of connecting a plurality of types of master units having different communication systems and control command formats without using accessories or the like is realized. it can.
Moreover, even if a plurality of master units are connected at the same time, the control does not become complicated, and a user-friendly in-vehicle disk exchange device can be realized.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a configuration example of a main part of a master unit of a system to which an embodiment of an in-vehicle disk exchange device according to the present invention is applied.

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

FIG. 4 is a diagram showing a flow chart for explaining a control command process in an embodiment of the vehicle-mounted disk exchange device according to the present invention.

FIG. 5 is a diagram showing a flow chart for explaining a control command process in one embodiment of the on-vehicle disc exchange device according to the present invention.

FIG. 6 is a diagram showing a flow chart for explaining a control command process in an embodiment of the vehicle-mounted disc exchanging device according to the present invention.

FIG. 7 is a diagram showing a flow chart for explaining a control command process in one embodiment of the on-vehicle disc exchange device according to the present invention.

[Explanation of symbols]

1 Control Microcomputer 6 Stabilized Power Supply Circuit 10 In-Vehicle Disk Exchanger 11 Communication Interface (Master Unit 20
12) Communication interface (master unit 30)
13) UART circuit 14 power supply selector switch 20 master unit (navigation device) 21 control microcomputer 22 stabilizing power supply circuit 30 master unit (audio device) 31 control microcomputer 32 stabilizing power supply circuit 40 bus line 41 communication line 42 power supply line 50 bus Line 51 Communication line 52 Power line 53 Remote command signal communication line

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[Procedure amendment]

[Submission date] December 22, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

[0046] This ensures, for the control commands control microcomputer 31 of the master unit 30 can not cope impossible decoding can be controlled directly vehicle disk changer 10 from the remote commander 61 or 62.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

[0048] Then, asynchronous communication is Ru performed using UART circuit 13 described above with the control microcomputer 21 and the control microcomputer 1. Navigation CD-ROM is
If it is generated, the vehicle-mounted disc exchange device 10
Digital data is supplied to the star unit 20,
Solution function is realized. CD-G is played
If the the required video output device signals is supplied to the master unit 20. Also, the audio signal is reproduced by the speaker. In this case, the in-vehicle disc exchange device 10 of this example also operates as a CD-ROM changer.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

[0050] Then, performed is synchronous communications described above between the control microcomputer 31 and the control microcomputer 1, CD and C
The D-G is reproduced, the audio signal is reproduced by the speaker, the graphics image of the CD-G is displayed on the screen of the monitor device, and the in-vehicle disc exchange device 10 of this example is the same as the conventional one. Works as a CD changer.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

In this case, as described above, when a remote control signal that cannot be decoded by the control microcomputer 31 is input from the remote commander 61 or 62, the control microcomputer 1 directly receives this remote control command signal through the communication line 53. Then, it decodes and performs corresponding control.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0062

[Correction method] Change

[Correction content]

When it is determined in step S11 that there is no command input from the master unit 20, the process proceeds to step S14, and it is determined whether or not there is a command input from the master unit 30.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0066

[Correction method] Change

[Correction content]

[0066] When it is judged not accessible for direct disk in Step S2 2, the process proceeds to step S24, to cancel the command processing, the process proceeds to step S25, to the master unit 20, the display device 24
Issue by sea urchin instructions that are shown in Table that it has canceled the command processing. Then, the process returns to the main routine 100.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0068

[Correction method] Change

[Correction content]

Next, in step S27 and the subsequent steps, the control command branches after performing the condition determination and executes the respective processes. That is, for example if it is determined that in Step S2 7 is a control command 1, the process proceeds to step S28,
If the control command 1 is not processed, the process proceeds to the next step to determine whether it is the control command 2, and if it is the control command 2, the control command 2 is executed. If it is not the control command 2, proceed to the next step and determine whether it is the control command 3 ...
As described above, each control command is processed by conditional branching. After the processing, the process returns to the main routine 100.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0069

[Correction method] Change

[Correction content]

The flowchart 400 of FIG. 7 is an example of the processing routine of the command processing (C). This is completely the same as <br/> Step S2 7 onward in FIG. 6, the conditional branch to command processing by the control command. That is, if the control command 1 is determined in step S31, the process proceeds to step S32, the control command 1 is processed,
If it is not the control command 1, the process proceeds to the next step, and it is determined whether or not it is the control command 2. If it is the control command 2, the control command 2 is executed. Go to the step to determine whether it is the control command 3 or not, and branch conditionally like ......
Process each control command. After processing, main routine 1
Return to 00.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0074

[Correction method] Change

[Correction content]

[0074]

As described above, according to the present invention, a vehicle-mounted disk exchange device capable of connecting a plurality of types of master units having different communication systems and control command formats without using accessories or the like is realized. it can.
Moreover, even if they are connected to the plurality of master units at the same time, control not become complicated, taking the user to use without permission good vehicle disc replacement device can be realized.

Claims (3)

[Claims] Claim: What is claimed is: 1. An in-vehicle disc exchange apparatus for exchanging a disc and reproducing a signal from a disc in response to a control signal from a master unit which receives a user's operation input. And a second communication interface for exchanging a control signal with a second master unit having a communication method and a control command format different from those of the first master unit. And a control unit that generates or receives a control signal via the first and second communication interfaces and controls the entire apparatus, and the control unit determines the type of the disc being reproduced. And a control command from the first master unit or the second master unit. And decoding means for said determination means and on the basis of information from said decoding means, vehicle disk changer characterized by having a means for determining a priority for the decoded control command by said decoding means. 2. The in-vehicle disk exchange device according to claim 1, wherein the first communication interface is a synchronous communication interface and the second communication interface is an asynchronous communication interface. In-vehicle disc exchange device. 3. The in-vehicle disk exchange device according to claim 1, wherein the connection detecting means detects connection between the first master unit and the second master unit, and the first or second master unit. When a connection between a plurality of master units is detected by the connection detection means and a power supply circuit that supplies the necessary power to each part, the power supply circuit supplies only the power from one master unit. An in-vehicle disk exchange device, which is provided with a means for switching so as to receive supply.