JPH08115560A - Disk device and stopping method therefor - Google Patents

Abstract

PURPOSE: To diminish displacement of an optical pickup and to quickly ' resume the operation by moving an optical pickup into a resuming position decided by a resuming position deciding means based on a kind of disk by a driving means and subsequently performing the resumption. CONSTITUTION: Reading out a signal from the disk 101 by the optical pickup 103 is stopped at a step S1002. Here in the step S1002, a stopping position of reading out the signal by the optical pickup 103 is stored in a memory 117 in a system controller 114 as well. In a step S1003, the optical disk is discriminated to be a magneto-optical disk by the system controller 114, and then the optical pickup 103 is moved to a first position of a read-in area as the resuming position by a feed motor 106. Operation of this MD player is interrupted at a step S1004, and a main power source is cut off by opening a power source switch as a power source supply stopping part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device such as an MD (mini disc) player or a method of stopping a disc device.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing a conventional disk device. In this figure, 1 is a disc on which various information is recorded, 2 is an optical pickup for reading the recorded information as a signal by shining light on the disc 1, 3
Is a spiral shaft on which the optical pickup 2 moves, and the spiral shaft 3 is provided in the radial direction of the disc 1. Reference numeral 4 is a motor for rotating the spiral shaft 3. Reference numeral 5 is an amplifier for generating address information and data signal from the signal read by the optical pickup 2, 6 is a demodulation circuit for demodulating the data signal generated by the amplifier 5, and the data signal demodulated by the demodulation circuit 6 is sent to a reproducing system. Is output. Reference numeral 7 is a data extraction circuit for extracting address information output from the RF amplifier 5. Here, generally, the address information is information such as a track number (song number), an index number in one track number, and a reproduction time. A controller 8 drives the motor 4 via the motor drive circuit 9 according to the address information extracted by the data extraction circuit 7 to control the position of the optical pickup 2 in the radial direction of the disk 1.

In the disk device thus constructed, the information recorded on the disk 1 can be sequentially read by the optical pickup 2 moving on the spiral shaft 3 while the disk 1 is rotating.

FIG. 8 is a block diagram showing an on-vehicle audio system including a CD (compact disc) player as a disc device. In this figure, 21 is a CD player, 21a is a CD player reproducing section, and 21b is a power switch of the CD player. Reference numeral 22 is a radio / cassette integrated machine, 22a is a radio tuner, 22b is a cassette deck, 22c is an amplifier, and 22d and 22e are switches for switching outputs. Reference numeral 23 is a control panel for selecting which one of the CD player 21, the cassette deck 22b and the radio tuner 22a the user wants to use by pressing a button, 24 is a power supply for supplying electric power, and 25 is a speaker.

In the car audio system having such a configuration, the user can press the button on the control panel 23,
Select the CD player 21, cassette deck 22b or radio tuner 22a, and switch 22d and 22e.
The selected output is reproduced from the speaker 27 through the amplifier 26 in the vehicle by switching. Here, in a vehicle audio system or the like, in order to reduce power consumption, the power of the CD player is turned off by opening the switch 21b when the CD player 21 is not selected.

When the power is turned off, the optical pickup 2 is kept in the reproduction position when the power is turned off, and when the power is turned on thereafter, the innermost or outermost portion of the CD. I moved to the so-called home position and played again from this home position. Therefore, for example, when the user selects the CD player 21 on the control panel 23 and the radio player 22b is selected while the CD player 21 is playing, and then the CD player 21 is selected again, Since the power supply to the CD player 21 was once stopped, the CD player 21 was supposed to play from the first part of the CD, not from the part that was interrupted previously.

However, the user often desires to reproduce the CD again from a state where the CD is interrupted like a cassette deck. Therefore, a memory is provided in the CD player 21,
The position on the CD in the state where the reproduction is interrupted is stored in the memory as the entire address information and the address information of the position, and when the reproduction is performed again, the interrupted position is calculated from the address information stored in this memory. , The method of starting the reproduction from the calculated position is performed.

However, for example, the number of tracks of a CD is 99, but the number of tracks of an MD is 255. Such a method is used for a CD having a small amount of address information data. Such a method cannot be used in an MD (mini disk) that has a large amount of data to be stored, such as address information and text information, because the amount of data that can be stored in the memory becomes too large. Therefore,
In the MD, only the position of the optical pickup on the disc is stored in the memory at the time of interruption, and when resuming the reproduction after the interruption, first, move to the first position of the MD, read the entire address information, etc. The interrupted position was calculated from the position on the disk stored in, and the reproduction was performed from this calculated position.

[0009] As another conventional example, Japanese Patent Laid-Open No. 5-31
4486, Japanese Patent Laid-Open No. 4-1930 and Japanese Patent Laid-Open No.
No. 2-214576 is mentioned.

[0010]

In the conventional disk device as described above, when the power is turned off, the optical pickup is not moved and is held at the reproducing position. Therefore, the reproduction is restarted. At that time, since the pickup first moved to the first position (home position) of the disc and moved to the position stored in the memory after reading the entire address information, it took time to restart the playback. It was

It is an object of the present invention to obtain a disk device which can quickly restart reproduction.

Another object of the present invention is to provide a method for stopping a vehicle-mounted disk device that can be restarted quickly after the stop.

[0013]

DISCLOSURE OF THE INVENTION A disk device according to the present invention comprises an optical pickup for reading information from a disk, a drive means for displacing the optical pickup in the radial direction of the disk, and an optical pickup by a predetermined input. The reading stop means for stopping the reading of information and the restart position determining means for determining the restart position of the optical pickup based on the type of the disk are provided.

Further, an optical pickup for reading information from the disc, a driving means for displacing the optical pickup in the radial direction of the disc, a reading stopping means for stopping the reading of information by the optical pickup, and an electric power to the driving means. And a restart position determining means for determining the restart position of the optical pickup based on the disc type.

Further, a restart position determining means for determining whether or not the optical pickup is at the restart position determined by the restart position determining means at the time of restart is provided.

Further, an optical pickup for reading information from the disc, a driving means for displacing the optical pickup in the radial direction of the disc, a reading stopping means for stopping the reading of information by the optical pickup by a predetermined input, and the disc. Table of contents information position determining means for determining the position of the table of contents information inside.

If the disk is a magneto-optical disk, U (user) -TOC (total of contents)
A table-of-contents information position determining means for setting a region as a position of table-of-contents information is provided.

Further, when the disc is ejected while the reading of information by the optical pickup is stopped, the driving means moves the optical pickup to the lead-in area.

Further, when the output to the group of speakers is switched from the output of the disk device to the other output, the reading of information by the optical pickup is stopped and the driving means is driven to the restart position based on the type of the disk in the disk device. Thus, after the optical pickup moves, at least a part of the power supply to the driving means is stopped.

Further, an optical pickup for reading information from a disc having a plurality of data areas in which different data types are recorded and divided in the radial direction, a driving means for displacing the optical pickup in the radial direction of the disc, and a predetermined Reading stop means for stopping the reading of information by the optical pickup by the input of, and storage means for storing the data in a part of the plurality of data areas while the reading of the information by the optical pickup is stopped. And are provided.

[0021]

According to the present invention, the optical pickup for reading information from the disc, the driving means for displacing the optical pickup in the radial direction of the disc, and the reading stopping means for stopping the reading of information by the optical pickup by a predetermined input. And a restart position determining means for determining the restart position of the optical pickup based on the type of the disc, and after the reading stopping means stops reading the information by the optical pickup, the driving means uses the restart position determining means. The displacement is performed to the determined restart position.

Further, an optical pickup for reading information from the disc, a driving means for displacing the optical pickup in the radial direction of the disc, a reading stopping means for stopping reading of information by the optical pickup, and an electric power to the driving means. And a restart position determining means for determining the restart position of the optical pickup based on the type of the disk, and the drive means moves the optical pickup to the restart position determined by the restart position determining means. After the displacement, the power supply means stops the power supply to the drive means.

Further, when restarting, the restarting position determining means for determining whether or not the optical pickup is at the restarting position determined by the restarting position determining means is provided, and the restarting position determining means determines that the optical pickup is not at the restarting position. Has
The drive means moves the optical pickup to the restart position.

Further, an optical pickup for reading information from the disc, a driving means for displacing the optical pickup in the radial direction of the disc, a reading stopping means for stopping reading of information by the optical pickup by a predetermined input, and a disc. The index information position determining means for determining the position of the index information in the inside is provided, and after the reading stopping means stops the reading of the information by the optical pickup, the driving means moves the optical pickup to the index determined by the index information position determining means. It is to move to the information position.

If the disk is a magneto-optical disk, U (user) -TOC (total of contents)
When the disc is a magneto-optical disc, the drive unit drives the optical pickup U- when the reading of the optical pickup is stopped by providing the index information position determining means for setting the area as the position of the index information.
It is to move to the TOC area.

Further, when the disc is ejected while the reading of information by the optical pickup is stopped, the driving means moves the optical pickup to the lead-in area.

Further, when the output to the group of speakers is switched from the output of the disk device to another output, the drive means moves the optical pickup to the restart position based on the type of the disk in the disk device, and then to the drive means. At least a part of the power supply of the above is stopped.

Further, an optical pickup for reading information from a disc having a plurality of data areas in which different data types are recorded and divided in the radial direction, a driving means for displacing the optical pickup in the radial direction of the disc, and a predetermined Reading stop means for stopping the reading of information by the optical pickup by the input of, and storage means for storing the data in a part of the plurality of data areas while the reading of the information by the optical pickup is stopped. And
During the period from when the optical pickup stops reading the information to when it resumes reading, the optical pickup is moved by the drive means to one of the plurality of data areas not stored by the storage means.

[0029]

【Example】

Example 1. FIG. 1 is a block diagram showing an MD player as a disc device according to the first embodiment. In this figure, 101 is an MD disc, 102 is an objective lens for focusing the laser beam, 103 is an optical pickup for reading the signal on the disc 101 by the laser beam, and 104 is a laser beam from the signal read by the optical pickup 103. It is an RF amplifier that outputs a servo signal necessary for accurate trace of and an RF signal for data reproduction. Reference numeral 105 denotes a servo control circuit that controls the objective lens 102, a feed motor 106 (described later) and a spindle motor 107 (described later) based on a servo signal obtained by an RF amplifier and a servo signal output from a system controller 114 (described later). Is. 106 is the optical pickup 103 and the disc 1
01 is a feed motor as a drive means for moving in the radial direction, and 107 is a spindle motor for rotating the disk 101.

Reference numeral 108 denotes an ADIP (address-in-pregroove) signal (ATIP) obtained from a groove called a pregroove which is preliminarily carved in a magneto-optical disk (MO (magnet optical) disk) for recording / reproducing even in MD. (Also referred to as a signal) to extract a signal for rotation servo such as time information, 109 is an RF signal decoder for demodulating an RF signal input from the RF amplifier 104, and 110 is an input from the RF signal decoder. A vibration-proof memory controller for storing a signal to be stored in a DRAM 111 (described later) and outputting it to an audio compression decoder 112 (described later) while reading it from the DRAM 111, and 111 is a vibration-resistant memory controller 110.
It is a DRAM (Dynamic Random Access Memory) that stores signals from the disk, data management information of the disk being reproduced, incidental information, and the like. Here, the accompanying information is character information such as a disc title and a track title. Reference numeral 112 expands the signal compressed from the vibration-proof memory controller 110 and compressed to about one fifth, and D /
It is an audio compression decoder for outputting to the A converter 113.

Reference numeral 114 designates this MD player as an input key 11
The system controller serves as a restart position determining unit or a table of contents information position determining unit and a reading stopping unit which is controlled by a signal from the device 5 or the like and displays information on the display unit 116. 117 is built in the system controller 114, and when the main power of the device is off, the disc type information of the disc mounted before the main power is turned off (the disc type is a read-only disc or a recording / playback combined use) It is a memory for storing information indicating whether it is a disc or a hybrid disc), and reproduction position information before interruption (information on a reproduction position when the main power supply of the mounted disc is turned off). This memory 11
7 is supplied with a backup power source such as an internal battery which is different from the main power source, so that the stored contents are not erased when the main power source of the device is cut off like the DRAM 111. Therefore, the disc type information and the reproduction position information before interruption are stored in the DRAM 111 when the main power source of the apparatus is connected.
And stored in the memory 117 and transferred to the memory 117 when the main power is turned off.

Now, with reference to FIG. 2, which is an explanatory diagram for explaining various areas on the disc, the type of the disc on which generally used information is recorded will be described. The discs are CD (Compact Disc) and M
There is a D (mini disc). Of these, the CD is for reproduction only, but the MD has two types: reproduction only and recording / reproduction. FIG. 2a is an explanatory diagram showing a data area of a recording / reproducing disk (MO disk) of MD, and FIG. 2b is a CD and MD.
FIG. 7 is an explanatory diagram showing a data area of the reproduction-only disc of FIG.

First, the read-only disc will be described with reference to FIG. The read-only disc is divided into a lead-in area and a data area in the radial direction. In the lead-in area (TOC area), information indicating the type of disc, a table of contents recorded on this disc, so-called TOC (total of contents) information is recorded. This TOC information is, for example, in the case of a music disc, the number of songs (the number of tracks) recorded on the disc, the order of each song, the performance start time, the frame number, and
The total playing time. Of these, the frame number is address information recorded for each frame when a predetermined group of data recorded in the data area is set as one frame. That is, the data is recorded in the data area, and each frame is addressed by the frame number.

Next, the recording / reproducing disk will be described with reference to FIG. 2a. The read / write disk is divided into a lead-in area, a table of contents area, and a data area in the radial direction. In the lead-in area, information indicating the type of disc, the start address of the table of contents area, the start address of the data area, and the like are recorded. The table of contents area is a writable area,
The order and start address of each data recorded on the disc are recorded. The information stored in this table of contents area is called U (user) -TOC information and is rewritten after data is recorded in the data area of the disc.

FIG. 3 is a flow chart showing the operation of the first embodiment. The operation will be described with reference to this flowchart. At step 1000, the MD player starts operation. At step 1001, when the operation of the MD player is interrupted and a request to turn off the main power source is input from the input key 115 to the system controller 114, the process proceeds to step 1002. In step 1002, the optical pickup 103 stops reading the signal from the disc 101. Here, in step 1002, the optical pickup 1
The position where 03 stops reading the signal is also stored in the memory 117 in the system controller 114. In step 1003, the system controller 114 determines that the optical disk is a magneto-optical disk, and the optical pickup 103 is moved to the first position of the lead-in area, which is the restart position, by the feed motor 106. In step 1004, the operation of the MD player is interrupted, and the main power source is turned off by opening a power switch (not shown) as a power supply stop unit.

That is, for example, the user inputs the input key 115.
Even if a request to cut off the supply of power from the main power source is input to the system controller 114 by pressing the switch, the power supply from the main power source is continued and the optical pickup 10
After 1 moves to the first position in the lead-in area, the power supply from the main power supply is cut off. In order to perform such an operation, the system controller 114 may control each part. Further, the main power supply unit may be provided with a timer that operates after a lapse of a predetermined time after a request to cut off the supply of electric power from the main power supply.

Since the first embodiment is configured as described above, the amount of movement of the optical pickup when the operation is restarted is small, and therefore data output by the optical pickup (for example, reproduction of music in the case of music MD). It is possible to shorten the time until it is performed. Further, since the lead-in area is set as the restart position for both the optical disk and the magneto-optical disk, the processing in the system controller 114 is simplified.

Example 2. FIG. 4 is a flowchart showing the second embodiment. This embodiment 2 will be described with reference to FIGS. 4 and 1.
Will be described. In step 1100, the MD player starts operation. In step 1101, a request for interrupting the operation of the MD player, that is, turning off the main power is made from the input key 115 to the system controller 1
If it is input to 14, the process proceeds to step 1102. In step 1102, the optical pickup 102 is picked up from the disc 101.
Stop reading signals. Step 1103
The disc type information stored in the memory 117 is used to discriminate whether the disc 101 mounted in step S1 is a read-only disc (optical disc) or a recording / playback disc (magneto-optical disc). If it is a magneto-optical disk, the process proceeds to step 1105. In step 1104, the optical pickup 103 is moved to the first position in the index area. In step 1105, the optical pickup 103 is moved to the first position in the lead-in area. In step 1106, the operation of the MD player is interrupted and the main power supply is turned off.

The other operations and configurations are the same as those in the first embodiment, and therefore the same reference numerals are given and the description thereof is omitted.

In the second embodiment, as described above, the optical pickup can be moved to the optimum position according to the type of disc when the operation of the MD player is stopped. It is possible to shorten the time required to reproduce the data.

Example 3. FIG. 5 is a flowchart showing the third embodiment. This embodiment 3 will be described with reference to FIGS. 5 and 1.
Will be described. In step 1200, the MD player starts operation. In step 1201, a request for interrupting the operation of the MD player, that is, turning off the main power source, is issued from the input key 115 to the system controller 1
If it is input to 14, the process proceeds to step 1202. In step 1202, the optical pickup 103 is picked up from the disc 101.
Stop reading signals. Step 1203
It is discriminated whether the disc mounted in is a read-only disc (optical disc) or a recording / playback disc (magneto-optical disc).
If it is a magneto-optical disk, proceed to step 204.
Go to 6. In step 1204, the optical pickup 103 is moved to the first position in the lead-in area. In step 1205, the operation of the MD player is interrupted and the main power is turned off.

In step 1206, the optical pickup 103
To the first position in the table of contents area. Step 12
At 07, the operation of the MD player is interrupted and the main power is turned off. When the disc 101 is ejected from the apparatus in step 1208, so-called eject (EJ), the process proceeds to step 1204. When the disc is not ejected, the operation suspended state is maintained until the next main power supply is turned on.

When the disc is ejected in step 1208, the main power source is generally turned on,
Since it is ejected by the electric ejecting device, it is sufficient to proceed to step 1204 with the main power source turned on and move the optical pickup to the lead-in area. However, the main power source is not turned on and the eject is performed manually. In the case of an ejecting device of a type, an eject detection sensor for detecting the eject is provided, and when the eject detection sensor detects the eject, the main power is turned on, and the step 12
You can proceed to 04. Other configurations and operations are the same as those in the first or second embodiment, and thus the description thereof will be omitted.

In the third embodiment, as described above, when the disc is ejected and a different disc is loaded, the optical pickup is moved to the optimum position. It is possible to reduce the time required for. In addition, it is possible to prevent malfunction of the optical pickup due to the wrong moving position when different discs are mounted.

Example 4. FIG. 6 is a flow chart showing a fourth embodiment of the present invention. The fourth embodiment will be described with reference to FIGS. 6 and 1. In step 1300, the main power is turned on and the MD player starts operating. In step 1301, a request for interrupting the operation of the MD player, that is, turning off the main power supply is made by the input key 11
If the data is input to the system controller 114 from 5, the process proceeds to step 1302. In step 1302, the optical pickup 103 stops reading a signal from the disc 101. In step 1303, whether the loaded disc 101 is a read-only disc (optical disc),
Whether the disk is a recording / playback disk (magneto-optical disk) is discriminated from the disk type information or the like. If the disk is an optical disk, the operation proceeds to step 1316. In step 1304, the optical pickup 103 is moved to the contents area, and then in step 1
At 305, the operation of the MD player is interrupted.

Next, in step 1306, the input key 11
5 sends a signal to the system controller 114,
Step 1 if the disc 101 is ejected
If the disc 101 is not ejected, the process proceeds to step 314. In step 1307, it is confirmed whether or not there is a request from the input key 115 to the system controller 114 to restart the operation. If there is a request to restart the operation, the process proceeds to step 1308.
Return to 306. In step 1308, the system controller 114 as the restart position determining means detects from the address information that the optical pickup 103 actually reads a certain position when the operation is restarted. Step 130
In 9, the system controller 114 confirms whether or not the actual position of the optical pickup 103 detected in step 1308 is the head position of the table of contents area. If it is not the table of contents area, the optical pickup searches the disc 101 in step S1310. While moving to the beginning position of the table of contents area. Step 1309 or Step 1310
After the optical pickup 103 is moved to the head position of the table of contents area, the U-TOC information is read in S1311.

Then, in step 1312, when the signal reading is stopped in step 1302, the optical pickup 103 is stored in the memory 117 in the system controller 114 up to the reproduction position before power interruption.
Moves and the reproduction is restarted in step 1313.

At step 1314, since the main power source is turned on to eject the disc 101 when the disc 101 is ejected, the optical pickup 103 can be moved. Also, since the disc 101 is ejected, the operation is continued from the time of interruption of operation. Since there is no meaning in reproducing again, the optical pickup 103 is moved to the lead-in area or the home position. Then, when the signal reading is stopped in step 1302, the reproduction position before the power interruption is stored in the memory 117 in the system controller 114 is erased, and the step 1315 is executed.
The operation is interrupted again at. Then, if there is a restart request, the optical pickup 103 starts reproduction from the first position.

Next, when the disc loaded in the MD player is an optical disc, the optical pickup 103 is moved to the lead-in area in step 1316, and the operation is interrupted in step 1317, that is, the main power is turned off. In step 1318, if the disc 101 is ejected, the process proceeds to step 1314, and if not ejected, the process proceeds to step 1319. In step 1319, if there is an operation restart request, the process proceeds to step 1319. If not, the process returns to step 1318. In step 1320, the actual position of the optical pickup 103 is detected, and in step 1321, it is confirmed whether or not the optical pickup 103 is in the lead-in area. If the optical pickup 103 is not in the lead-in area, step 1
At 322, the optical pickup 103 is moved to the head position of the lead-in area. In step 1323, TOC information is read, and in step 1312, reproduction is started from the position of the optical pickup 103 at the time of operation interruption.

In the fourth embodiment, as described above, since it is confirmed whether or not the optical pickup is at the optimum position, it is possible to prevent the malfunction due to the wrong position of the optical pickup.

In each of the above-mentioned embodiments, the reproduction-only MD player has been described, but it may be used in other disc players such as an MD player for both recording and reproduction, an optical disc device used as a storage device of a computer, and a disc player such as a CD player. Needless to say.

In each of the above-mentioned embodiments, a multi-disc type disc device for reproducing a large number of discs by one player may be used. In the case of a multi-disc type disc device, it is ejected that the discs are exchanged inside the device.

In each of the above embodiments, the on-vehicle disk device has been described, but it goes without saying that it may be used for other purposes.

In each of the above embodiments, the restart position is determined from the type of disk, but the restart position can be determined by searching the restart position with an optical pickup when the power is turned off.

In each of the above embodiments, the case of reproduction is described, but it goes without saying that the same can be applied to the case of recording on a disc.

It goes without saying that the disk device shown in each of the above embodiments can be used in place of the CD player 21 in the vehicle-mounted audio system as shown in FIG. 8 of the conventional example.

[0057]

As described above, according to the present invention, the drive means moves the optical pickup to the restart position based on the type of the disk determined by the restart position determining means and restarts the optical pickup. The displacement is small and it can be restarted quickly.

[Brief description of drawings]

FIG. 1 is a block diagram showing an MD player according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a data area of a disc according to the present invention.

FIG. 3 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 4 is a flowchart showing a second embodiment of the present invention.

FIG. 5 is a flow chart showing a third embodiment of the present invention.

FIG. 6 is a flow chart showing a fourth embodiment of the present invention.

FIG. 7 is a block diagram showing a conventional disk device.

FIG. 8 is a block diagram showing a conventional vehicle-mounted audio system.

[Explanation of symbols]

101 ... Disc, 103 ... Optical pickup, 105 ...
Servo control circuit, 106 ... Feed motor, 114 ... System controller

Claims (8)

[Claims] 1. An optical pickup for reading information from a disc, a drive means for displacing the optical pickup in the radial direction of the disc, and a reading stop means for stopping reading of information by the optical pickup by a predetermined input. A restart position determining means for determining a restart position of the optical pickup based on the type of the disc, and the driving means sets the read position after the reading stopping means stops reading information by the optical pickup. A disk device, wherein the optical pickup is displaced to the restart position determined by the restart position determining means. 2. An optical pickup for reading information from a disc, a driving means for displacing the optical pickup in the radial direction of the disc, a reading stopping means for stopping reading of information by the optical pickup, and the driving means. Power supply stop means for stopping the supply of electric power to the optical pickup, and restart position determining means for determining the restart position of the optical pickup based on the type of the disk, and the driving means determines the restart position of the optical pickup. The disk device, wherein the electric power supply means stops supplying electric power to the drive means after the electric power supply means is displaced to the restart position determined by the means. 3. Resuming position determining means for determining whether or not the optical pickup is at the restarting position determined by the restarting position determining means when restarting, the restarting position determining means determining that the optical pickup is not at the restarting position. The disk drive according to claim 1 or 2, wherein the drive means moves the optical pickup to the restart position in the case of doing so. 4. An optical pickup for reading information from a disc, a drive means for displacing the optical pickup in the radial direction of the disc, and a reading stop means for stopping reading of information by the optical pickup by a predetermined input. Index information position determining means for determining the position of the index information in the disc, and the driving means stops the optical pickup after the reading stopping means stops reading the information by the optical pickup. A disk device, wherein the disk device is moved to the position of the index information determined by the position determining means. 5. The table-of-contents information position determining means is U (user) -TOC (total
5. The disk device according to claim 4, wherein an area of contents is set as a position of the table of contents information. 6. The method according to claim 4, wherein when the disc is ejected while the reading of information by the optical pickup is stopped, the driving means moves the optical pickup to the lead-in area. Disk device. 7. When switching the output to the group of speakers from the output of the disk device to another output, after the optical pickup is moved by the drive means to the restart position based on the type of the disk in the disk device, A method of stopping a disk device, characterized in that the supply of electric power to the drive means is stopped. 8. An optical pickup for reading information from a disc having a plurality of data areas of different data types recorded and divided in the radial direction, and a drive means for displacing the optical pickup in the radial direction of the disc. Reading stop means for stopping the reading of information by the optical pickup by a predetermined input, and data in a part of the plurality of data areas while the reading of information by the optical pickup is stopped. And a storage means for storing the information, wherein the optical pickup is located at the beginning position of one of the plurality of data areas not stored by the storage means between the time when the optical pickup stops reading the information and the time when the optical pickup restarts. A disk drive which is moved by the drive means.