JP2002197775A - On-vehicle av unit and its resume function actualizing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable individual AV apparatuses of on-vehicle AV unit to maintain a resume function without using a battery backup power source nor a memory for resume data storage. SOLUTION: When some AV apparatuses having a resume function are operating, resume data regarding the AV apparatuses are transmitted at specific time intervals from the AV apparatuses to a system control means 11 which controls a plurality of AV apparatuses to store the latest resume data into a memory 15; when a main power switch 33 (ignition switch or ACC switch of a vehicle) is turned off or turned on again, the resume data are read out of the memory 15 and the AV apparatuses perform resume operations according to the resume data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle AV device having a resume function.

[0002]

2. Description of the Related Art A conventional vehicle-mounted AV (audio / video) will be described below.
An example of the device will be described with reference to FIG. FIG. 5 is a block diagram showing a conventional AV apparatus. In FIG. 5, an in-vehicle AV device 30 installed in a vehicle includes a system control unit 11b and a plurality of AV devices (for example, a CD device 19, an MD device 21b, and a DVD device 23b) controlled by the system control unit 11b. , Operation means 25 and display means 29. The system control means 11b controls the vehicle-mounted AV device 30 as a whole,
It has a U13, a memory 15, and a main power switch on / off detector 17. The main power switch 33 is a main power switch provided between the battery of the vehicle and the in-vehicle AV device 30. When the main power switch 33, which is an ignition switch or an ACC switch of the vehicle, is ON, power from the battery 31 is supplied. The system control means 11b and the operating AV
Given to equipment. The CD device is a device that records or reproduces data on or from a compact disc (CD, CD-R, or CD-RW), and the MD device is a device that records or reproduces data on a mini disc (MD). A DVD device is a device that performs recording or reproduction on a digital video disk (DVD).

In this example, it is assumed that the MD device 21b and the DVD device 23b have a resume function. The resume function means that when the operation is interrupted during recording or playback on a certain AV device, the data before the interruption regarding the operation of the AV device is stored as resume data, and when the operation is resumed, This is a function for continuing the operation before the interruption based on the stored resume data. The user can set whether to enable (ON) or disable (OFF) the resume function. The MD device 21 includes a memory for storing resume data in the MD device 21b, and the DVD device 23b also includes a memory for storing resume data in the DVD device 23b.

[0004] For example, it is assumed that the user turns off the main power supply 33 (ignition switch or ACC switch) of the vehicle while reproducing the MD (mini-disc) by the MD device 21b.
In this case, the main power switch on / off detector 17 in the system control means 11b detects that the main power is turned off. Then, a backup power supply is supplied from the backup power supply 27 to the system control unit 11b and the MD device 21b according to the detection result. Also, resume information (for example, the number of the track being reproduced) related to the MD device 21b before the main power supply 33 is turned off is stored in the memory of the MD device 21b, and when the main power supply 33 is turned on again,
The resume data is read from the MD device 21b, and based on the resume data, the MD device 21b resumes reproduction from the track that was being reproduced before the main power switch 33 was turned off.

[0005]

As described above, in a conventional vehicle AV apparatus, an AV apparatus which is considered to require a resume function is provided with a resume function independently for each apparatus. It is stated that a required resume function can be provided even if a user selects any AV device and configures one AV device. However, in the above-described conventional apparatus, each AV device requiring the resume function needs to have a memory for storing resume data, and in order to reduce the consumption of the backup power supply 27, only the necessary devices are required. It was necessary to perform complicated power management such as providing a backup power supply to a computer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a vehicle-mounted AV apparatus in which individual AV apparatuses can resume without using a backup power supply or a memory for storing resume data. It is to be able to possess functions.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first invention has at least a microprocessor and a memory and can control two or more AV devices. In a vehicle-mounted AV device including a system control unit, a backup power supply for supplying power to the system control unit, and a first AV device controlled by the system control unit, the first AV device operates. While the resume data relating to the first AV device is transmitted from the first AV device to the system control means, a power switch provided between the battery and the vehicle-mounted AV device is turned off and then turned on again. In some cases, the first AV device is based on the resume data stored in the system control means and continues to operate before the power switch is turned off. It is a place.

According to the on-vehicle AV device of the present invention, each AV device does not have a memory for storing resume data and stores resume data in the memory of the system control means. Since there is no need for a memory or backup power supply, and there is no need to manage the power supply for supplying backup power only to a specific AV device, it is possible to easily realize the resume function of the in-vehicle AV device. To play.

According to a second aspect, in the vehicle-mounted AV device according to the first aspect, the resume data is transmitted from the first AV device to the system control means at predetermined time intervals while the first AV device is operating. This is a vehicle-mounted AV device.

According to the vehicle-mounted AV device of the present invention, when transmitting resume data from the AV device to the system control means, the resume data is transmitted at a predetermined time interval before a main power switch such as an ignition switch is turned off. By doing so, the latest resume data is always stored without imposing an excessive load on the MPU of the system control means, so that the resume processing can be reliably performed even if the main power is shut off at any timing.

According to a third invention, in the vehicle-mounted AV device according to the first invention, when the identification number of information recorded or reproduced by the first AV device changes, the first AV device transmits the system control means. This is an in-vehicle AV device that transmits resume data.

According to the on-vehicle AV device of the present invention, when transmitting resume data from the AV device to the system control means, the identification number of information to be recorded or reproduced by the AV device before the main power switch is turned off, for example, Resume data is transmitted when the track number changes.
After the identification number of the information is updated, the time stamp changes until the identification number of the information is updated next, but no important resume data is newly generated. Therefore, even if the frequency of transmission of the resume data is reduced so as not to put an excessive burden on the MPU of the system control means, the latest resume data is always stored in the memory of the system control means, and the resume processing is performed. It can be done reliably.

According to a fourth aspect of the present invention, there is provided a system control means having at least a microprocessor and a memory and capable of controlling two or more AV devices, a backup power supply for supplying power to the system control means, A method for realizing a resume function of a vehicle-mounted AV device including a first AV device controlled by a control unit, wherein the first AV device is connected to the first AV device while the first AV device is operating. Transmitting resume data to the system control means, based on resume data stored in the system control means when a power switch provided between the battery and the on-vehicle AV device is turned off and then turned on again. And a step of causing the first AV device to perform a resume operation.

According to a fifth aspect of the present invention, in the resume function realizing method for a vehicle-mounted AV device according to the fourth aspect, the step of transmitting the resume data to the system control means transmits the resume data at a predetermined time interval. This is a method for implementing the resume function of the in-vehicle AV device.

According to a sixth aspect of the present invention, in the method for realizing a resume function of an on-vehicle AV device according to the fourth aspect, the step of transmitting the resume data to the system control means includes information recorded or reproduced by the first AV device. This is a method for realizing a resume function of an in-vehicle AV device in which resume data is transmitted when the identification number changes.

[0016]

Embodiments of the present invention will be described below. In the in-vehicle AV device of the present invention, a plurality of AV
The resume data of the active AV device is stored in the system control means for controlling the device. That is, when a certain AV device having a resume function is used,
The resume data is transmitted from the device to the system control means and stored in the memory. When the main power switch (the ignition switch or the ACC switch of the vehicle) is turned off and then turned on again, the resume data is stored from the memory of the system control means. The resume data is read, and a resume operation is performed based on the resume data.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment and a second embodiment of an in-vehicle AV device according to the present invention. In FIG. 1, an on-vehicle AV device 10 installed in a vehicle includes:
It comprises a system control unit 11, a plurality of AV devices (for example, a CD device 19, an MD device 21 and a DVD device 23) controlled by the system control unit 11, an operation unit 25, and a display unit 29. The system control means 11 controls the vehicle-mounted AV apparatus 10 as a whole, and at least the MPU 1
3 and a memory 15 and a main power switch on / off detector 17. The main power switch 33 is connected to the vehicle battery and the vehicle A
A main power switch provided between the power supply device and the V device 30;
It is an ignition switch or ACC switch of the vehicle. When the main power switch 33 is ON, the battery 31
Is supplied to the system control means 11 and the operating AV equipment.

The operation means 25 is an operation means for the user to control each AV equipment, and the display means 29 is the number or name of the equipment currently being operated, or the number of the track being recorded / reproduced, or the number of the radio being received. This is a display device that displays a channel name and the like. In this example, the MD device 21 and the DVD
It is assumed that the device 23 has a resume function. M
The D device 21 and the DVD device 23 need not have a memory for storing resume data. The backup power supply 27 is a power supply used by the system control unit 11 when the main power switch 33 is turned off.

If the user sets the resume function to ON and, for example, reproduces an MD (mini-disc) on the MD device 21, the MD device 21 sends the resume data to the system control means 11 at a constant cycle. And send
The system control means 11 receives the resume data and stores the received resume data in the memory 15 each time. It is assumed that the user turns off the main power supply 33 (ignition switch or ACC switch) of the vehicle while the MD device 21 is performing the reproducing operation. In this case, the main power switch on / off detector 17 in the system control means 11 detects that the main power is turned off. Then, a backup power supply is provided from the backup power supply 27 to the system control means 11 in accordance with the detection result.

Resume information relating to the operation of the MD device 21 before the main power supply 33 is turned off (for example, the reproduced AV
The identification number of the device and the track number) are already stored in the memory 15, and when the main power supply 33 is turned on again, the system control means 11 reads the resume data from the memory 15, and based on the resume data, the MD. The power of the device 21 is turned on. Then, the system control unit 11 transmits the resume data read from the memory 15 to the MD device 21. The MD device 21 performs a resume operation based on the received resume data, and the main power switch 33
Playback is resumed from the track that was playing before the was shut off.

FIG. 2 is a flowchart showing the resume data transmission processing according to the first embodiment of the present invention. This example is a case where the user plays a compact disk for music (music CD) on the CD device 19. First, when reproduction is instructed from the system control means 11 to the CD device 19, the power of the CD device 19 is turned on (step S11). In step S13, the presence or absence of a disk is checked. If a disk is mounted, the process proceeds to step S17. If the disk is not mounted, the disk is mounted in step S15, and then the process proceeds to step S17. In step S17, the type of the disc is checked, and the process proceeds to step S19. In step S19, the user specifies a track to be reproduced, and resets the timer to zero.

Next, in steps S23 and S25,
The elapsed time from the timer reset is checked while sequentially playing back from the designated tracks, and when 5 seconds or more have elapsed, the process proceeds to step S27. In step S23, the track number is incremented as necessary. In step S27, the resume data of the CD device 19 is transmitted from the CD device 19 to the system control means 11, and the process proceeds to step S29.
In step S29, the timer is reset to zero, and the process proceeds to step S31. In step S31, have all tracks been reproduced? If the answer is Yes, the process ends, and
If so, the process proceeds to step S33. In step S33, has there been an instruction to end reproduction? If the determination is Yes, the process is terminated, and if the determination is No, the process proceeds to step S23. As described above, in the first embodiment of the present invention, the active AV
Since the resume data is transmitted from the device to the system control means 11 at predetermined time intervals, the memory 15 always stores the latest resume data.

FIG. 3 is a flow chart showing the resume processing according to the first and second embodiments of the present invention. This flowchart shows a resume process after the main power switch ON / OFF detector 17 detects that the main power switch 33 is turned ON again. The resume data transmission process according to the second embodiment of the present invention will be described later in detail. In FIG. 3, is the user setting the resume function to ON? Is asked to the system control means 11, and if Yes, the step S43
If No, the in-vehicle AV device 10 is stopped in step S51. In step S43, is there any device used when the main power switch 33 is turned off? If there is, go to step S45, otherwise go to step S45
Go to 51. In step S45, the system control unit 11
Reads the identification number of the used AV device from the memory 15 and turns on the power supply of the device with the identification number.
In this example, it is assumed that the power of the CD device 19 is turned on.

In step S47, is a disc loaded? If yes, the process proceeds to step S49, and if no, the process proceeds to step S51. Step S4
In step S53, disc identification information is read from the disc, and in step S55, the disc type is determined.
Proceed to. In step S55, the disk identification information stored in the memory 15 is read. This disc identification information is the identification number of the disc that was playing before the playback of the CD device 19 was interrupted.

In step S57, does the currently mounted disk identification number match the disk identification number read from memory 15? If Yes, the process proceeds to step S61, and if No, the process proceeds to step S59. In step S61, the resume processing is performed based on the resume data stored in the memory 15, and the reproduction is resumed from the track that was being reproduced before the main power switch 33 was turned off. In step S59, reproduction is started from the beginning of the disc, and the resume processing ends.

FIG. 4 is a flowchart showing a resume data transmission process according to the second embodiment of the present invention. This second
The on-vehicle AV device to which the embodiment is applied is the same as the on-vehicle AV device 10 shown in FIG. This example is also an example in which the user reproduces a CD with the CD device 19 as in the first embodiment. In FIG. 1, steps S11 to S19
The steps up to this point are the same as those of the first embodiment shown in FIG. When the user specifies a track to be reproduced in step S19 in FIG. 4, next, in step S71, the CD device 1
The resume data of No. 9 is transmitted from the CD device 19 to the system control means 11, and the flow advances to step S73. Step S7
In step 3, the track (the track with the current track number) is reproduced, and the flow advances to step S75. In step S75, has the reproduction of the track been completed? If yes, the process proceeds to step S77, and if no, the process returns to step S73.

In step S77, the number of the track to be reproduced is incremented by 1, and the flow advances to step S31.
In step S31, have all tracks been reproduced? Asked,
If Yes, this process ends. If No, go to step S33. In step S33, has there been an instruction to end reproduction? If the answer is Yes, this process ends,
If No, the process proceeds to step S71. As mentioned above,
In the second embodiment of the present invention, the resume data is transmitted from the AV device to the system control means 11 every time the track number to be recorded or reproduced by the operating AV device is changed. Resume data is stored. The flowchart of the resume process in the second embodiment is the same as that in the resume process in the first embodiment shown in FIG.

As described in detail above, according to the present invention, each AV device does not have a memory for storing resume data, and stores resume data in the memory of the system control means 11. Therefore, each AV device stores resume data. No memory and backup power supply are required, and there is no need for power management to supply backup power only to specific AV equipment when the main power supply is cut off. Can be easily realized. When the resume data is transmitted from the AV device to the system control means, the resume data is transmitted at a predetermined time interval before the main power switch 33 is turned off, or the number of the track to be recorded or reproduced is changed. When the resume data is transmitted, the resume processing can be reliably performed without imposing an excessive load on the MPU of the system control unit 11.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment and a second embodiment of an in-vehicle AV device according to the present invention.

FIG. 2 is a flowchart illustrating a resume data transmission process according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating a resume process according to the first and second embodiments of the present invention.

FIG. 4 is a flowchart illustrating a resume data transmission process according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional AV apparatus.

[Explanation of symbols]

 Reference Signs List 11 system control means 13 microprocessor (MPU) 15 memory 17 main power switch on / off detector 19 CD device 21 MD device 23 DVD device 25 operating means 27 backup power supply 29 display means 31 battery 33 main power switch

Claims (6)

[Claims] 1. A system control means having at least a microprocessor and a memory and capable of controlling two or more AV devices, a backup power supply for supplying power to the system control means, and control by the system control means. In-vehicle AV apparatus having a first AV device
While the first AV device is operating, the first
When the power switch provided between the battery and the in-vehicle AV device is turned off and then turned on again, the first AV device transmits the system control data to the system control means. Wherein the operation before the power switch is shut off is continued based on the resume data stored in the means.
V device. 2. The in-vehicle AV apparatus according to claim 1, wherein the resume data is transmitted from the first AV apparatus to the system control means at a predetermined time interval while the first AV apparatus is operating. . 3. The resume data is transmitted from the first AV device to the system control means when an identification number of information recorded or reproduced by the first AV device changes. AV equipment for vehicles. 4. A system control means having at least a microprocessor and a memory and capable of controlling two or more AV devices, a backup power supply for supplying power to the system control means, and control by the system control means. The resume function of the in-vehicle AV device provided with the first AV device, wherein the resume data relating to the first AV device is transmitted from the first AV device while the first AV device is operating. Transmitting the data to the system control means, and resuming the power switch provided between the battery and the on-vehicle AV device based on the resume data stored in the system control means when the power switch is turned on after being turned off and on again.
Performing a resume operation of the AV device. 5. The method according to claim 4, wherein in the step of transmitting the resume data to the system control means, the resume data is transmitted at predetermined time intervals. 6. The transmitting of the resume data to the system control means, wherein the resume data is transmitted when an identification number of information recorded or reproduced by the first AV device changes. 4. A method for realizing a resume function of an in-vehicle AV device according to item 4.