JP2000030417A - Information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly reproduce a record medium requested from a user even at a device initialization time by storing the top part data on the requested recording medium in a sub-storage means when the user requests the reproduction of the specified recording medium at the device initialization time, storing the data after the top part data in a main storage means and reproducing the requested recording medium. SOLUTION: At the device initialization time, when the user requests the MD 1a as the specified MD, a system controller 11 controls a stage controller 33 and a loading controller 34, etc., and loads the MD 1a on a player box 32, and reads the top part data of the MD 1a to store them in a top part area of a RAM 12. Thereafter, the system controller 11 reads out the top part data from the RAM 12 to start to reproduce them, and succeedingly, stores the data after the top part data in the main memory area of the RAM 12. Thus, at the device initialization time, the MD 1a requested by the user is reproduced rapidly and continuously from the top part without breaking a sound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can store a plurality of recording media such as an MD (mini-disc) and a CD (compact disc) on which information such as music is recorded. The present invention relates to an information reproducing apparatus such as an MD changer system or a CD changer system that can select and reproduce an image.

[0002]

2. Description of the Related Art An MD changer system and a C-changer system capable of accommodating a plurality of disks such as MDs and CDs and selecting and reproducing an arbitrary disk from the plurality of disks.
Disc changer systems such as the D changer system have been put to practical use.

A method of improving the operability of music reproduction by sequentially writing digital data read from a disk on which music information is recorded as digital data to a memory such as a RAM and reading the digital data from the memory is also conceivable. ing.

[0004]

However, in the above-described disc changer system, when a disc is exchanged at the request of the user, the disc is actually exchanged until the disc requested by the user is reproduced.
It takes a long time of up to about 10 seconds, during which time the silent state continues, giving the user discomfort.

[0005] Therefore, in such a disc changer system, at the time of normal reproduction, even if the disc is exchanged at the request of the user, the disc requested by the user is not changed.
A method has been conceived in which the sound is immediately and continuously reproduced from the beginning without interruption.

According to this method, data read from a disk is sequentially written to a memory such as a RAM as described above, and data at the head of the disk is stored separately from a memory area (hereinafter referred to as a main memory area) to be read. When a memory area to be stored (hereinafter referred to as a head memory area) is set, data of a head of each disc is stored in the head memory area in advance, and when a disc requested by a user is reproduced, First, the head data of the disk is read and output from the head memory area, the disk is replaced, and the data following the head data in the data read from the disk requested by the user is replaced with the main memory area. After reading all the head data from the head memory area, write the data after the head data from the main memory area. And outputs read the data.

However, the main memory area and the head memory area may be separate areas of one memory, or may be separate memories.

According to the above method, during normal reproduction, even if the disk is exchanged at the request of the user, the disk requested by the user is immediately and continuously reproduced from the head without interruption.

In this method, at the time of system initialization such as when power is supplied to the system, each disk in the disk box is sequentially mounted on the player box,
Each head data is sequentially read from each disk, and the read head data of each disk is sequentially written to the head memory area.

However, in this method, at the time of system initialization, as described above, each disk is sequentially read.
The head data of each disk must be sequentially stored in the head memory area by being mounted on the player box, and an MD capable of storing, for example, five MDs during this time.
With a changer system, normal reproduction cannot be performed for a time of about 40 seconds.

The time of about 40 seconds does not provide the head memory area separately from the main memory area, that is, does not move the disk box by the stage controller when the power is turned on in the conventional system in which the head data is not stored in the memory. In this case, it is much longer than several seconds, which is the rising time in the case, or about 10 seconds, which is the rising time in the case where the disk box is moved by the stage controller. Therefore, when the system is initialized such as when the power is turned on, the user is inconvenienced.

Accordingly, the present invention provides a head memory area separately from the main memory area and stores the head data in the head memory area, so that even when the recording medium is exchanged at the request of the user at the time of normal reproduction, it is possible for the user. In an information reproducing apparatus such as a disc changer system in which a requested recording medium is immediately and continuously reproduced from a head without interruption of information, a system for storing head data of each recording medium in a head memory area. Even at the time of initialization, the recording medium requested by the user can be immediately reproduced.

[0013]

SUMMARY OF THE INVENTION According to the present invention, in an information reproducing apparatus capable of storing a plurality of recording media, of which a selected recording medium is mounted at a reproducing position and reproducing the data, the data read from the recording medium is used. A main storage unit that is sequentially written and sequentially read out, and a sub storage unit that stores head data of each recording medium.
When the reproduction of a specific recording medium is requested by the user, the head data of the requested recording medium is stored in the sub-storage means, and the data after the head data is stored in the main storage means. Playback the recorded media,
In parallel with this, the head data of another recording medium is sequentially
It is characterized in that it is stored in the secondary storage means.

In the information reproducing apparatus of the present invention having the above-described configuration, when the system is initialized in which the head data of each recording medium is sequentially stored in the sub-storage means, the user is requested to reproduce the specific recording medium. If so,
The head data of the requested recording medium is stored in the secondary storage means, the data after the head data is stored in the main storage means, and the requested recording medium is reproduced, and in parallel with this, The head data of another recording medium is sequentially stored in the secondary storage means. Therefore, even at the time of system initialization, the recording medium requested by the user can be immediately reproduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described for the case where the present invention is applied to an MD changer system.

[Basic Configuration of System] FIG. 1 shows the functional configuration of an MD changer system according to this embodiment. The MD changer system is roughly divided into a disk box 31 capable of storing, for example, five MDs 1a to 1e.
And a player box 32 for reproducing one of the MD1s (in the figure, MD1a in the disc box 31 is indicated by a broken line as MD1a), and moving the MD between the disc box 31 and the player box 32 And a loading controller 34.

The stage controller 33 mounts any MD in the disc box 31 to the player box 32 and mounts it in the player box 32 according to an instruction from the system controller 11 constituted by, for example, a microcomputer in the player box 32. To which position in the disc box 31 to return the loaded MD1 to the loading controller 34.
Is determined according to the determination of the stage controller 33.
D to the player box 32, removal from the player box 32, and disc box 3
A mechanism such as a loading motor, not shown in the figure, for returning to 1 is controlled.

The MD 1 which is a magneto-optical disk mounted at a predetermined position of the player box 32 is driven to rotate by a spindle motor 2, and at the time of reproduction, information is read from the optical head 3 to the MD 1 from the reflected light by the magnetic Kerr effect. Is irradiated with a relatively low level laser beam.

The optical head 3 includes, in addition to a laser diode for outputting laser light, an optical system including an objective lens 3a and a polarizing beam splitter, a two-axis actuator 4,
And a light detector for detecting the reflected light from the MD1.

The objective lens 3a includes a biaxial actuator 4
Thereby, it is possible to move in the radial direction of MD1 and in the direction approaching MD1 or moving away from MD1. Further, the entire optical head 3 is moved by the thread mechanism 5 to M
It is movable in the radial direction of D1.

When the MD changer system also has a recording function, a magnetic head for applying a magnetic field modulated by data to the MD1 is omitted from the drawing, though not shown in the figure.
The optical head 3 is disposed at a position facing the optical head 3 with the laser beam interposed therebetween, and at the time of recording, a high-level laser beam for heating the recording track to the Curie temperature is irradiated from the optical head 3 to the MD 1. However, since the present invention does not directly relate to the recording, the description of the recording is omitted hereafter.

At the time of reproduction, information read from the MD 1 by the optical head 3 is supplied to the RF amplifier 7, and the RF amplifier 7 performs arithmetic processing on the read RF signal, tracking error signal, and focus error signal. , Groove information (absolute position information recorded as a pre-groove (wobbling groove) in MD1).

The groove information from the RF amplifier 7 is decoded by the address decoder 10, and the absolute position information is obtained from the address decoder 10. The address information recorded on the MD 1 as data is transmitted to the RF decoder 8.
Is extracted by The absolute position information and the address information are supplied to the system controller 11 and used for various controls.

The tracking error signal and the focus error signal from the RF amplifier 7 are supplied to a servo circuit 9 together with a track jump command, an access command, rotation speed detection information, and the like from the system controller 11, and various signals are sent from the servo circuit 9. Is obtained, the two-axis actuator 4 and the sled mechanism 5 are controlled by the servo control signal,
The tracking control and the focus control are performed, the optical head 3 is moved in the radial direction of the MD 1 by the sled control, and the rotation of the spindle motor 2 is controlled so that the MD 1 rotates at a constant linear speed.

The reproduced RF signal from the RF amplifier 7 is RF
Processing such as EFM demodulation and CIRC decoding is performed by the decoder 8, and the data after the processing is written by the system controller 11 to the RAM 12 as a reproduced data output 21 as described later.

The data written in the RAM 12 is transmitted to the memory data output 22 by the system controller 11.
As will be described later, after being read from the RAM 12 and slightly adjusted by the system controller 11,
The audio data input 23 is supplied to the audio decoder 13 for processing, and a linear audio data output 24 is obtained from the audio decoder 13. This linear audio data output 24 is supplied to the D / A converter 14.
Is converted into an analog audio signal 25, and the analog audio signal 25 is led out to the audio output terminal 15.

[Memory Configuration] FIG. 2 shows a configuration example of the RAM 12. In this example, the RAM 12 is
It has memory addresses up to FFF, of which 000
This is a case where an address area from 00 to 7FFFF is set as the main memory area 12M.

In the main memory area 12M, 000
T, which will be described later, of the address area from 00 to 0FFFF
A TOC memory area 12M1 in which OC (Table Of Contents) information is stored, and a disk memory area 12M2 in an address area from 10000 to 4FFFF in which the reproduced data output 21 is stored.

Then, the reproduction data output 21 from the MD 1 is output.
Is stored while incrementing the last input address in the past in the disk memory area 12M2. As a result, when the input address reaches 4FFFF,
Next, it returns to the lower order and is stored continuously from address 10000. That is, the disk memory area 12M2 has a so-called ring buffer configuration.

Further, in the process, when the input address reaches the output address from which the memory data output 22 is read, the system controller 11 stops accumulating data in the disk memory area 12M2. The system controller 11 reads and takes in the memory data output 22M from the area 12M3 in which data in the disk memory area 12M2 is stored while incrementing the output address from the lower order.

In the case of MD, the memory data output 22M is incremented at a rate of 1/4 or less of the reproduction data output 21. Therefore, even if a data error occurs due to an external impact or the like, the music can be reproduced and output for a certain period of time by using the data stored in the storage area 12M3, and the error can be recovered during that time. Thus, continuous reproduction can be guaranteed.

T stored in TOC memory area 12M1
The OC information is information stored in the disc box 31 such as a title, a time, and a recorded address on the MD of the music recorded on each MD. The data is read from each MD in advance and written in the TOC memory area 12M1, and is used by the system controller 11 for disk access or the like.

Further, in the MD changer system of this embodiment, as shown in FIG.
The address area from 00 to FFFFF is set as the head memory area 12S.

When the system is initialized, for example, when power is supplied to the system, the stage controller 33 and the loading controller 34 are controlled by the system controller 11, and the MDs 1a, 1b, 1c, 1d, 1e in the disk box 31 are stored. MD1a, 1b, 1c, 1
The head data is read sequentially from d and 1e.

The read MD1a, MD1a,
The head data of 1b, 1c, 1d, and 1e is processed in the same manner as in the normal reproduction, and the head data Da of the MD 1a is processed by the system controller 11 as shown in FIG.
Is from 80000 to 8FF in the head memory area 12S.
In the address area 12Sa up to the FF, the head data Db of MD1b is in the address area 12Sb from 90000 to 9FFFF, and the head data Dc of MD1c is A
Address area 12Sc from 0000 to AFFFF
The head data Dd of MD1d is
In the address area 12Sd up to FFFF, the head data De of the MD1e is sequentially written into the address area 12Se from C0000 to CFFFF.

Each of the address areas 12Sa to 12Se is 3.2 Mbit, which corresponds to about 14 seconds in the case of MD. Therefore, each of the address areas 12Sa to 12Se has 3.2 Mbit and about 14 seconds of leading data. Da ~
De will be stored.

As shown in FIG. 2, when the head data Da to De of all the MDs 1a to 1e are stored in the head memory area 12S, the system initialization is completed. The time required for this, as described later, is about 40 seconds when not according to the present invention, as described above. Then, as will be described later, when the present invention is not used, normal reproduction cannot be performed during the system initialization.

[Normal Reproduction after System Initialization] In normal reproduction after the head data Da to De is stored in the head memory area 12S by system initialization, even if the MD is exchanged at the request of the user, Is reproduced continuously from the head immediately without interruption.

For example, in an on-vehicle MD changer system, the user plays the first MD 1a while driving a car, and wants to know the contents of a different MD, and selects the second MD 1b. The case is shown as an example.

In this case, at the time of the user's selection operation, MD1a is mounted on the player box 32, and MD1a is mounted.
Since a is reproduced, the latest data of MD1a is stored in the storage area 12M3 in the main memory area 12M.

In this state, if there is a request to reproduce MD1b,
The system controller 11 calculates the output address of the RAM 12 from the address at which the memory data output 22M of the storage area 12M3 was last read out, from the head memory area 12S
Is changed to the start address 90000 of the address area 12Sb in which the head data Db of the MD 1b is stored, and the head data Db of the MD 1b is read.

The read head data Db is stored in the memory data output 22 read from the storage area 12M3.
Similarly to M, the data is processed by the audio decoder 13 as the memory data output 22 and further processed by the A / D converter 14.
Is converted to an analog signal. Therefore, immediately after the user's selection operation, the head of MD1b requested by the user is reproduced. Since the head part data Db is about 14 seconds, the head part is reproduced without interruption for about 14 seconds.

At the same time, the system controller 11
From the loading controller 34
Removes the MD 1a from the player box 32 and returns the MD 1a to the original position of the disc box 31. The time required for this is about 1 second.

Next, in response to a command from the system controller 11, the stage controller 33 moves the disk box 31 by one stage in this case. The time required for this depends on the amount of movement.
About 8 seconds.

Further, according to a command from the system controller 11, the loading controller 34 stores the MD 1b in the disc box 31 in the player box 3
Attach to 2. The time required for this is about 1 second.

Thus, the MD1 requested by the user is
b is mounted on the player box 32 at a predetermined position.
The time required for this is about 6 to 10 seconds.

Thereafter, the system controller 11 sends the T stored in the TOC memory area 12M1 in advance.
Based on the OC information, a position offset from the head position of the disc by 10000, which is a continuation address of the head data Db of MD1b, is calculated, and the optical head 3 is made to access the position. The time required for this is about 1 second.

After the access is completed, the system controller 1
1 is the data from the accessed location, ie, M
The data after the head data Db of D1b is stored as the reproduction data output 21 in the disk memory area 12M2 in the main memory area 12M from the head address 10000.

At this time, since it is within 14 seconds from the time of the user's selection operation, the RAM 12 reads the MD1b from the address area 12Sb in the head memory area 12S.
Is read out as the memory data output 22.

Then, about 14 hours from the point of the user's selection operation
Seconds later, when all the head data Db of the MD 1b is read, the system controller 11 sets the output address of the RAM 12 to the final address 9FF of the address area 12Sb.
From the FF, the data is changed to the head address 10000 of the disk memory area 12M2, and the data after the head data Db of the MD 1b is read as the memory data output 22M.

Therefore, the sound is continuously reproduced from the head of the MD 1b requested by the user to the subsequent part without interruption. Subsequent processing is the same as in the conventional system in which the head data is not stored in the memory.

As another case, after the user selects MD1b, another MD, for example, MD1c, is selected within about 14 seconds from the address area 12Sb until the head data Db of MD1b is completely output. In some cases, the system controller 11 determines the output address of the RAM 12 from the address in the address area 12Sb as MD1c.
Address area 12 in which the leading data Dc is stored
The start address A0000 of Sc is changed, and the start data Dc of MD1c is read. Thereafter, the MD 1c is mounted on the player box 32 and the data after the head data is reproduced from the MD 1c, and the method thereof is the same as described above. Therefore, immediately after the user selects another MD, the other MD is continuously reproduced from the head without interruption.

[Embodiment of System Initialization] In the system initialization method described above, it takes about 40 seconds until the head data Da to De of all MDs 1a to 1e are stored in the head memory area 12S. During this time, normal reproduction cannot be performed.

The time of about 40 seconds is about several seconds, which is a rise time when the stage controller 33 does not move the disk box 31 when the power is turned on in the conventional system in which the head data is not stored in the memory. It is much longer than about 10 seconds, which is the rise time when the disk box 31 is moved by the drive 33. Therefore, when the system is initialized such as when the power is turned on, the user is inconvenienced.

Therefore, in the embodiment of the present invention, the MD requested by the user can be immediately reproduced even at the time of system initialization for storing the head data of each MD in the head memory area.

(First Example) A first example of the initialization method of this embodiment will be described below. In this example, at the time of system initialization, if the user requests reproduction of a specific MD, the MD requested by the user is processed first, and each M is sequentially processed in the order of the stage number from the MD requested by the user.
This is a case where the head data of D is stored in the head memory area 12S. However, the processing order can be changed as described later.

FIGS. 3, 4 and 5 show an initialization processing routine performed by the system controller 11 in this example. In the initialization processing routine 50, after the processing is started,
First, in step 51, the system controller 11 determines whether or not the user has requested reproduction of a specific MD. The following is the MD1a of the stage number 1
This is a case where the reproduction of the request is requested.

If the user has requested reproduction of a specific MD, the system controller 11 proceeds from step 51 to step 52, in which the system controller 11 controls the stage controller 33 and the loading controller 34, etc. In this case, the MD 1a is attached to the player box 32, and the process proceeds to step 53.
The portion where the TOC information of the innermost portion of the MD 1a is recorded is accessed to read the TOC information, and the TOC information is written to the TOC memory area 12M1. The MD1a requested by the user at the start of the processing is the player box 32
If it is attached to the, the processing in step 52 is not necessary.

Next, in step 54, the system controller 11 detects the address where the head data Da of the MD 1a is recorded from the TOC information, accesses the address and reads the head data Da of the MD 1a. The head data Da is stored in the head memory area 1
In the address area 12Sa in the 2S, the head address 8
Store from 0000. It takes about 4 seconds to store the head data Da in the address area 12Sa.

In this case, since the user has requested reproduction of the MD 1a, the system controller 11 thereafter
In step 55, the output address of the RAM 12 is set to the head address 80000 of the address area 12Sa, and
The head data Da of the MD 1a is read, and reproduction of the head of the MD 1a is started.

After all the head data Da of the MD 1a is stored in the address area 12Sa, the system controller 11
Continues the reproduction of MD1a in step 56,
The data after the head data Da is used as the reproduction data output 21 as the disk memory area 12 in the main memory area 12M.
The data is stored in M2 from the start address 10000.

When all the reproduced data outputs 21 are stored in the disk memory area 12M2 and the input address of the RAM 12 reaches 4FFFF, the system controller 11
The data accumulation in the disk memory area 12M2 is stopped. The time required for storing all data in the disk memory area 12M2 is about 15 seconds.

Since the address area 12Sa corresponds to the memory data output 22 of about 14 seconds, the address area 12Sa
About 14 seconds after the head data Da starts to be read from Sa, the output address of the RAM 12 reaches 8FFFF.

When the output address of the RAM 12 reaches 8FFFF, the system controller 11
, The output address of the RAM 12 is changed to the head address 10000 of the disk memory area 12M2,
The data after the head data Da of D1a is read, and
The part following the head part is reproduced continuously to the head part of 1a.

That is, while data is being stored in the disk memory area 12M2, the output address of the RAM 12 shifts to the disk memory area 12M2. If there is no error that requires re-reading during the reproduction of the MD 1a, and if the reproduction of the MD 1a is started simultaneously with the start of the initialization processing, the input address of the RAM 12 becomes about 13000 after about 14 seconds from the start of the processing.

Thereafter, when the reproduction of MD1a is continued, R
The output address of AM12 is the disk memory area 12M2
It takes about 50 seconds to reach the final address of 4FFFF. Therefore, in order to continue the continuous reproduction of the MD 1a, the subsequent data of the MD 1a needs to be stored again in the disk memory area 12M2 by about 50 seconds.

When the storage address of the reproduction data output 21 is 4
When FFFF is reached, the system controller 11
Stops the data accumulation in the disk memory area 12M2 and accumulates the head data of the MD other than the MD1a in the head memory area 12S.

For this reason, the system controller 11
First, in step 61, it is determined whether or not there is another MD for storing the head data. In this case, there is an MD.
Is stored in the head memory area 12S in this case, whether the MD requested by the user, in this case, the MD1a has continuous time to be continuously reproduced, is stored in the head memory area 12S. In this case, it is determined that there is enough time, and it
Thereafter, the head data of the next MD, in this case, the head data Db of MD1b is stored in the head memory area 12S.
To store.

That is, the system controller 11
First, in step 63, the loading controller 34 is controlled to remove the MD mounted in the player box 32, in this case, the MD 1a from the player box 32 and return it to the original position of the disc box 31. The time required for this is about 1 second.

Next, in step 64, the system controller 11 controls the stage controller 33 to move the disk box 31 by one stage in this case. The time required for this is about 4-5 seconds.

Further, in step 65, the system controller 11 controls the loading controller 34 to mount the next MD, in this case, MD1b, from the disc box 31 to the player box 32. The time required for this is about 1 second.

In this manner, the MD1 requested by the user
The MD 1b following a is mounted at a predetermined position of the player box 32. The time required for this is about 6 to 7 seconds.

Thereafter, the system controller 11 proceeds to step 66, accesses the portion of the MD 1b where the TOC information is recorded, reads the TOC information, and writes the TOC information into the TOC memory area 12M1. .

Next, in step 67, the system controller 11 detects the address where the head data Db of the MD 1b is recorded from the TOC information, accesses the address and reads the head data Db of the MD 1b. The head data Db is stored in the head memory area 1
In the address area 12Sb in the 2S, the head address 9
Store from 0000.

Access to TOC information recording part, TO
It takes about 1 second to write the C information and access the recording address of the head data Db, and it takes about 4 seconds to store the head data Db in the address area 12Sb.

Eventually, MD1 is performed by steps 63 to 67.
The time required to store the leading data Db of b in the leading memory area 12S is about 11 to 12 seconds.

Next, the system controller 11 returns to step 61 to determine whether or not there is another MD for storing the head data. In this case, the system controller 11 proceeds to step 62 from step 61 because it exists. , The head data Dc of the next MD, in this case, the head data Dc of the MD1c is stored in the head memory area 12S.
D. In this case, it is determined whether or not there is enough time to continue the continuous reproduction of the MD 1a. In this case, it is determined that there is sufficient time, and the process proceeds from step 62 to step 63 and thereafter, and the next MD Head part data, in this case MD1c
Is stored in the head memory area 12S.

In the accumulation of the head data Dc of the MD 1c, in a step 63, the MD 1b is removed from the player box 32 and returned to the original position of the disc box 31, and in a step 65, the MD 1c is mounted on the player box 32. In step 66, the TOC information of MD1c is read and written in the TOC memory area 12M1, and in step 67, the head data Dc of MD1c is read and stored in the address area 12Sc in the head memory area 12S. Except for M mentioned above
This is exactly the same as the case of accumulating the head data Db of D1b in the head memory area 12S.

Therefore, in steps 63 to 67, the head data Dc of the MD1c is stored in the head memory area 12S.
The time required to store in is about 11 to 12 seconds,
From the head memory area 12S to the head data D of MD1a
The time from when a is started to be read until the head data Dc of the MD 1c is stored in the head memory area 12S is about 22 to 24 seconds.

Further, the system controller 11 returns to step 61, and further stores the head data in the MD.
It is determined whether or not there is any data. In this case, since the data is present, the process proceeds from step 61 to step 62, and the head data of the next MD, in this case, the head data Dd of MD1d is stored in the head memory area 12S. , It is determined whether or not there is enough time to continue the continuous reproduction of the MD requested by the user, in this case, the MD 1a.

In this case, by the same processing in the subsequent steps 63 to 67, the leading data D
Assuming that d is stored in the head memory area 12S, the time required for the storage is about 11 to 12 seconds. Therefore, from the time when the head data Da of the MD 1a starts to be read from the head memory area 12S, about 33 to A time of 36 seconds elapses. On the other hand, as described above, MD1
To continue the continuous playback of a, by about 50 seconds later,
Subsequent data of MD1a needs to be stored in disk memory area 12M2.

Therefore, consider the time from when the head data Dd of MD1d is stored in the head memory area 12S, when the MD1a is mounted on the player box 32, and the subsequent data of MD1a starts to be stored in the disk memory area 12M2.

In this case, the system controller 11
First, by controlling the loading controller 34, the MD 1d mounted on the player box 32 is removed from the player box 32 and the disc box 3 is removed.
Return to the original position of 1. The time required for this is about 1 second. Next, the system controller 11 controls the stage controller 33 to move the disk box 31 by three stages. The time required for this is about 5-7
Seconds. Further, the system controller 11 controls the loading controller 34 to mount the MD 1a from the disc box 31 to the player box 32. The time required for this is about 1 second.

After the MD 1a is mounted at the predetermined position of the player box 32, the address position where the data subsequent to the data stored in the last address 4FFFF of the disk memory area 12M2 of the MD 1a is recorded is accessed. The subsequent data is read, and the subsequent data is stored in the disk memory area 12M2 from the start address 10000. This access takes about one second.

Therefore, the head data Dd of MD1d
It takes about 8 to 10 seconds to store the subsequent data of MD1a in the disk memory area 12M2 after the data is stored in the head memory area 12S.
The time from when the head data Da of MD1a starts to be read from 2S to when the head data Dd of MD1d is stored in the head memory area 12S is about 33 to 36.
Seconds, the subsequent data of MD1a is transferred to disk memory area 12 from the time when the head of MD1a starts to be reproduced.
It takes about 41 to 46 seconds to start storing in M2.

The maximum time of 46 seconds is about 50 seconds of the time required to start storing the subsequent data of MD1a in the disk memory area 12M2 in order to continue the continuous reproduction of MD1a.
It's not enough time for seconds. In order to reliably continue the continuous reproduction of the MD 1a, before storing the head data Dd of the MD 1d in the head memory area 12S, that is, storing the head data Dc of the MD 1c in the head memory area 12S.
Immediately after the data is stored in the disk memory area 12M2, it is necessary to start storing the subsequent data of the MD1a.

Therefore, the time from when the head data Dc of the MD1c is stored in the head memory area 12S, when the MD1a is mounted on the player box 32, and when the subsequent data of the MD1a starts to be stored in the disk memory area 12M2 is considered.

In this case, the system controller 11
First, by controlling the loading controller 34, the MD 1c mounted on the player box 32 is removed from the player box 32 and the disc box 3 is removed.
Return to the original position of 1. The time required for this is about 1 second. Next, the system controller 11 controls the stage controller 33 to move the disk box 31 by two stages. The time required for this is about 5-7
Seconds. Further, the system controller 11 controls the loading controller 34 to mount the MD 1a from the disc box 31 to the player box 32. The time required for this is about 1 second.

After the MD1a is mounted at the predetermined position of the player box 32, the address position where the data subsequent to the data stored in the last address 4FFFF of the disk memory area 12M2 of the MD1a is recorded is accessed. The subsequent data is read, and the subsequent data is stored in the disk memory area 12M2 from the start address 10000. This access takes about one second.

Therefore, the head data Dc of MD1c
It takes about 8 to 10 seconds to store the subsequent data of MD1a in the disk memory area 12M2 after the data is stored in the head memory area 12S.
The time from when the head data Da of MD1a starts to be read from 2S to when the head data Dc of MD1c is stored in the head memory area 12S is about 22 to 24 hours.
Seconds, the subsequent data of MD1a is transferred to disk memory area 12 from the time when the head of MD1a starts to be reproduced.
It takes about 30 to 34 seconds to start storing in M2.

The maximum time of 34 seconds is about 50 seconds of the time required to start storing the subsequent data of MD1a in the disk memory area 12M2 in order to continue the continuous reproduction of MD1a.
There is enough room for seconds.

Therefore, as described above, in step 62 after storing the leading data Dc of MD1c in the leading memory area 12S and returning to step 61, the system controller 11 determines that there is no time to spare and proceeds to step 62. From step 71.

That is, the system controller 11
First, in step 71, the loading controller 34 is controlled to remove the MD mounted in the player box 32, in this case, MD1c, from the player box 32 and return it to the original position of the disc box 31. The time required for this is about 1 second.

Next, in step 72, the system controller 11 controls the stage controller 33 to move the disk box 31 by two stages in this case. The time required for this is about 5-7 seconds.

Further, in step 73, the system controller 11 controls the loading controller 34 so that the MD requested by the user, in this case MD1
a from the disc box 31 to the player box 3
Attach to 2. The time required for this is about 1 second.

After the MD 1a is mounted at a predetermined position of the player box 32, the system controller 1
In step 74, the CPU accesses the address position where the subsequent data of the data stored in the last address 4FFFF of the disk memory area 12M2 of the MD 1a is recorded, reads the subsequent data, and outputs the subsequent data to the reproduced data output. Disk memory area 12 as 21
The data is stored in M2 from the start address 10000. This access takes about one second.

Therefore, the head data Dc of MD1c
Takes about 8 to 10 seconds before the subsequent data of MD1a starts to be stored in the disk memory area 12M2 after the data is stored in the head memory area 12S.
It takes about 30 to 34 seconds from the time when the head of D1a starts to be reproduced to the time when the subsequent data of MD1a starts to be stored in the disk memory area 12M2.

The succeeding data is stored in the disk memory area 12M2.
The time required to store up to the last address 4FFFF of the disk memory area 12 is about 15 seconds.
The subsequent data stored in M2 is output to the memory data output 22.
Corresponds to 50 seconds or more.

After that, the system controller 11 returns to step 61 and additionally stores the head data in the MD.
It is determined whether or not there is any data. In this case, since there are MD1d and 1e, the process proceeds from step 61 to step 62, and the head data of the next MD, in this case, the head data Dd of MD1d is added to the head. Even if the MD is stored in the memory area 12S, it is determined whether or not there is enough time to continue the continuous reproduction of the MD requested by the user, in this case, the MD 1a.
Since the subsequent data of D1a is stored in the disk memory area 12M2, in this case, it is determined that there is a time margin.
Proceeding from step 62 to step 63 and on, the next MD
, The head data Dd of MD1d in this case, is stored in the head memory area 12S.

The head data Dd of the MD 1d is stored in the steps 63 to 67 at the head data D of the MD 1b and 1c.
The data is stored in the head memory area 12S in the same manner as in b and Dc. In this case, in step 64, the disk box 31 is moved by three stages.
The time required to store the head data Dd of D1d in the head memory area 12S is about 13 to 15 seconds.

Thereafter, the system controller 11 returns to step 61 and additionally stores the head data in the MD.
It is determined whether or not the next MD exists. In this case, the MD 1e is present.
In this case, even if the head data De of the MD1e in this case is stored in the head memory area 12S, whether or not there is enough time to continue the continuous reproduction of the MD requested by the user, in this case, the MD1a Then, as described above, the subsequent data stored in the disk memory area 12M2 is equivalent to 50 seconds or more as the memory data output 22. In this case, too, it is determined that there is sufficient time, so that the
The process proceeds from step 2 to step 63 and thereafter, where the head data of the next MD, in this case, the head data De of MD1e, is stored in the head memory area 12S.

The head data De of MD1e is stored in steps 63 to 67 as the head data D of MD1b and 1c.
The data is stored in the head memory area 12S in the same method as that of b and Dc and in the same time of about 11 to 12 seconds.

Thereafter, the system controller 11 returns to step 61, and further stores the head data in the MD.
In this case, since there is no other MD for storing the leading part data, the process proceeds from step 61 to step 81, and further proceeds to the MD requested by the user, in this case, the MD1a sequence. Perform processing to continue playback.

In this manner, at the time of system initialization, the MD requested by the user is immediately and continuously reproduced from the head without any interruption of sound, and all MD1s are reproduced.
The head data Da to De of a to 1e are stored in the head memory area 12S.

As a whole, from the head memory area 12S to M
The head data Da to De of all MDs 1a to 1e are stored in the head memory area 12S until the time of about 89 to 92 seconds elapses from the time when the head data Da of D1a starts to be read. Data D at the beginning of MD1a
Before reading a from the head memory area 12S, it takes about 4 seconds to store the data in the head memory area 12S, and about 15 seconds to store the data after the head data Da of the MD1a in the disk memory area 12M2. It takes about 108 to 111 seconds from the start of reproduction of MD1a.

Thereafter, the system enters the normal reproduction mode. As described above, even if the MD is exchanged at the request of the user, the MD requested by the user is immediately and continuously output from the head without interruption. Will be played.

At the time of system initialization, if the user has not requested reproduction of a specific MD, the system controller 11 proceeds from step 51 to step 91 and
1a to 1e are sequentially mounted on the player box 32, and the leading data Da to De of the MDs 1a to 1e are sequentially
It is stored in the head memory area 12S.

At the time of system initialization, even when the user requests reproduction of a specific MD, at the start of processing, the user is in the MD attached to the player box 32 or on the stage to be loaded. If there is an MD, the head data of the MD may be stored in the head memory area 12S, and then the MD requested by the user may be processed.

(Second Example) In the first example described above, it takes a maximum of 111 seconds to initialize the system.
If, for example, the user requests reproduction of the MD1e within the time of seconds, the head data De of the MD1e has not yet been stored in the head memory area 12S.
The reproduction of the MD1e requested by the user cannot be performed for a maximum of about 9 to 11 seconds until the head 1e is mounted on the player box 32 and the head data De of the MD1e is stored in the head memory area 12S. There may be cases.

Therefore, in the second example, the time required for system initialization can be made shorter than in the first example. Therefore, in the second example, at the time of system initialization,
If the user has requested reproduction of a specific MD, the data following the head data of the MD requested by the user is first stored in the head memory area 12S, and the subsequent data is stored in the disk memory area 12M2. store.

In this example, the system controller 11
Since the initialization processing routine performed by the first embodiment has many parts in common with the initialization processing routine 50 shown in FIGS. 3 to 5 of the first example, the initialization processing routine 50 shown in FIGS. . Similar to the first example, a case where the user requests reproduction of the MD 1a will be described below.

After the processing is started, steps 51 to 5
5 is the same as in the first example, that is, the system controller 11 attaches the MD1a to the player box 32 in step 52, reads the TOC information from the MD1a in step 53, and reads the TOC memory area 12M1
In step 54, the head data Da is read from the MD1a and stored in the address area 12Sa in the head memory area 12S from the head address 80000. In step 55, the MD1a is read from the head address 80000 of the address area 12Sa. The head data Da is read, and the reproduction of the head of the MD 1a is started.

After all the head data Da of the MD 1a is stored in the address area 12Sa, the system controller 11
Continues the reproduction of MD1a in step 56,
The data after the head data Da is obtained. In the second example,
First, the data after the head data Da is first written not to the disk memory area 12M2 in the main memory area 12M but to the upper address area 12Sb of the address area 12Sa in the head memory area 12S where the head data Da is stored.
To 12Sd, the start address 9 of the address area 12Sb
Store from 0000.

When the data after the head data Da is all stored in the address areas 12Sb to 12Sd and the input address of the RAM 12 reaches BFFFF, the system controller 11 stops storing data in the head memory area 12S. The time required for storing all data in the address areas 12Sb to 12Sd is about 11 seconds.

As described above in the first example, the output address of the RAM 12 is 8FFF about 14 seconds after the start of reading of the head data Da from the address area 12Sa.
Reach F. However, in the second example, even if the output address of the RAM 12 reaches 8FFFF, the system controller 11 does not change the output address of the RAM 12 to the head address 10000 of the disk memory area 12M2 in step 57 without changing the address area. 12S
From the head address 90000 of b-12Sd, MD1a
Of the data after the head data Da of MD1a
The part after the head part is reproduced successively to the head part of.

When the data after the head data Da are all stored in the address areas 12Sb to 12Sd, and the input address of the RAM 12 reaches BFFFF, the system controller 11 in step 56 outputs the reproduced data output continuously from the MD 1a. 21 to the main memory area 12
The data is stored in the disk memory area 12M2 in M from the start address 10000. At this time, the output address of the RAM 12 is near 8C000.

Even if the reproduced data output 21 is all stored in the disk memory area 12M2 and the input address of the RAM 12 reaches 4FFFF, it takes about 27 seconds from the time when the head data Da starts to be read from the address area 12Sa. At this time, the output address of the RAM 12 is near the address 9F000.

When the storage address of the reproduction data output 21 reaches 4FFFF, the system controller 1
1 stops the data storage in the disk memory area 12M2, and stores the leading data Db of the next MD1b in the address area 12Sb of the leading memory area 12S after step 61.

That is, the system controller 11
At step 63, the MD 1a mounted on the player box 32 is removed from the player box 32 and returned to the original position of the disc box 31.
In step 4, the disc box 31 is moved by one stage, and in step 65, the MD 1b is moved to the player box 3
2, the TOC information is read from the MD 1b in step 66, and written in the TOC memory area 12M1,
At step 67, the head data Db is read from the MD 1b and the address area 12b in the head memory area 12S is read.
Sb is stored from the start address 90000.

As described above in the first example, it takes about 7 to 8 seconds for the head data Db of the MD 1b to start being stored in the address area 12Sb. Therefore, the head data Db is stored in the address area 12Sb. The start time is about 34 to 35 seconds after the start of reading the head data Da of the MD1a from the head memory area 12S, and at that time, the memory data output 22 is at the address A8000 of the address area 12Sc. A900
Output from around 0.

Further, since it takes about 4 seconds to store the head data Db in the address area 12Sb, the head data Da of the MD1a is stored in the head memory area 12S.
Is about 38 to 39 seconds from the start of reading the data to the time when the head data Db of the MD 1b is stored in the head memory area 12S.

Next, the system controller 11 similarly transfers the head data Dc of the next MD1c to the address area 12S of the head memory area 12S after step 61.
Store in Sc. Since the time required for this is about 11 to 12 seconds, the head data Dc of MD1c is stored in the head memory area 12S from the time when the head data Da of MD1a starts to be read from the head memory area 12S. The time until is about 49 to 51 seconds.

From the time point when the head data Da of the MD 1a starts to be read from the head memory area 12S, about 42 to 4
After 4 seconds, the output address of the RAM 12 reaches BFFFF. When the output address of the RAM 12 reaches BFFFF, the system controller 11 changes the output address of the RAM 12 to the head address 10000 of the disk memory area 12M2 in which data subsequent to the data stored in the address BFFFF is stored. And MD
Subsequent data of 1a is read, and MD1a is further continuously reproduced.

At the same time, the system controller 11 similarly transfers the head data Dd of the next MD1d to the address area 1S of the head memory area 12S after step 61.
Store in 2Sd. Since the time required for this is about 11 to 12 seconds, the time when the head data Da of the MD1a starts to be read from the head memory area 12S, the MD1d
Is stored in the head memory area 12S in about 60 to 63 seconds. At this time,
The memory data output 22M is the disk memory area 12M2
Is output from the vicinity of the address 25000-29000.

Further, the system controller 11 similarly transfers the head data De of the next MD1e to the address area 1S of the head memory area 12S after step 61.
Store in 2Se. Since the time required for this is about 11 to 12 seconds, the time when the head data Da of the MD1a starts to be read from the head memory area 12S, the MD1e
Is about 71 to 75 seconds until the head data De is stored in the head memory area 12S. At this time,
The memory data output 22M is the disk memory area 12M2
Is output from the vicinity of the address 31000-35000.

At this point, the system initialization has been completed. If the user subsequently requests the reproduction of a specific MD, the MD requested by the user can be reproduced immediately.

At this point, the disk memory area 12M
2 stores the data after the leading data Da of the MD 1a for about 23 to 27 seconds as the reproduction data output 21 up to the final address 4FFFF and remains. Therefore, after the initialization, to mount the MD 1a again in the player box 32 and read the subsequent data, 9 to 11
Even if a time of about seconds is required, the MD 1a can be continuously reproduced by first reading out a sufficient amount of data remaining in the disk memory area 12M2.

As described above, in the second example, the time required for system initialization is reduced to about 71 to 75 seconds, which is sufficiently shorter than the time of about 108 to 111 seconds in the first example. Can be.

Contrary to the above-mentioned example, M requested by the user
If the data following the leading data of D is stored in the entire disk memory area 12M2 first and the subsequent data is stored in the entire leading memory area 12S, the subsequent data stored in the entire leading memory area 12S is output. Until the start, the head data of another MD cannot be stored in the head memory area 12S, so that an extra wait time occurs and it takes time to initialize the system.

However, the data following the head data of the MD requested by the user is first stored in a part of the disk memory area 12M2, and the subsequent data is stored in the head memory area 12M2.
If the data is stored not in the entire memory area but in an area excluding a partial area in which the head data of another MD to be stored next in the head memory area 12S is stored, it functions in the same manner as the above-described example. The same effect can be obtained.

In this way, by storing the data following the head data of the MD requested by the user in the head memory area 12S, the initialization can be completed in a shorter time than in the first example.

[Other Embodiments] The main memory area and the head memory area may be separate memories instead of separate areas of one memory as in the above-described embodiment.

In the above embodiment, the recording medium is M
In the case of D, the present invention can be applied to a disc such as a CD other than the MD and a changer system for a recording medium other than the disc. In addition, information recorded on a recording medium and reproduced from the medium is not limited to music,
It may be an image or other information.

[0134]

As described above, according to the present invention, even when the recording medium is exchanged at the request of the user at the time of normal reproduction, the recording medium requested by the user is immediately and without interruption of the information from the head. In an information reproducing apparatus such as a disc changer system that is continuously reproduced, even when the system is initialized in which the head data of each recording medium is stored in the head memory area, the recording medium requested by the user is immediately reproduced. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing a functional configuration of an MD changer system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration example of a memory in the MD changer system according to the embodiment of the present invention;

FIG. 3 is a diagram showing a part of an example of an initialization processing routine.

FIG. 4 is a diagram illustrating a continuation of an example of an initialization processing routine;

FIG. 5 is a diagram illustrating a continuation of an example of an initialization processing routine;

[Explanation of symbols]

1, 1a-1e: MD (mini-disc), 2: spindle motor, 3: optical head, 7: RF amplifier, 8: RF
Decoder, 11 ... System controller, 12 ... RAM
(Random access memory), 12M ... main memory area,
12S: head memory area, 21: reproduction data output, 2
2 ... Memory data output, 31 ... Disk box, 32
... player box, 33 ... stage controller,
34 Loading controller

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D066 BA03 BA06 SE01 SF10 5D072 CB01 EB12 5D077 AA26 AA38 AA40 EA12 5D110 AA14 AA22 AA27 BB01 BB02 CK02

Claims (3)

[Claims] An information reproducing apparatus capable of storing a plurality of recording media, of which a selected recording medium is mounted at a reproducing position and reproducing the data, wherein data read from the recording medium is sequentially written and sequentially read. Storage means, and sub-storage means for storing head data of each recording medium, and when the apparatus is initialized, when a user requests reproduction of a specific recording medium, the start of the requested recording medium Part data is stored in the sub-storage means, the data after the head part data is stored in the main storage means, and the requested recording medium is reproduced, and in parallel with this, the head part data of the other recording medium is stored. An information reproducing apparatus characterized in that the information is sequentially stored in the secondary storage means. 2. The information reproducing apparatus according to claim 1, wherein at the time of initializing the apparatus, data subsequent to the requested top data of the recording medium is stored in said sub-storage means. 3. The information reproducing apparatus according to claim 2, wherein at the time of device initialization, data following the requested head data of the recording medium is first stored in said sub-storage means, and subsequent data is stored in said main storage means. An information reproducing apparatus, wherein the information is stored in a storage unit.