JP2000040292A - Audio reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce deviation of a reproducing output level at the starting part, in continuously reproducing without sound interruption immediately from the starting part of a user's required disk, even in the case where the disk is exchanged by the user's request, by storing the data of the starting part of the disk preliminarily in a memory in an MD(mini disk) changer system, for example. SOLUTION: At the time of initialization, TOC(table of contents) information is read successively from all MDs 1a-1e and written in the TOC memory area, the maximum amplitude level of a register 18 is initialized to the minimum value, the data of the starting part of the MD are stored in the memory area of the starting part, and the maximum amplitude level of the register 18 in storing the data is stored in the TOC memory area. In reading the starting part data from the memory area of the starting part and outputting it, a system controller 11 reads the maximum amplitude level of the register 18, comparing it with the maximum amplitude level stored in the TOC memory area at the time of storing the starting part data in the memory area of the starting part, and controlling the reproducing output level in accordance with the comparison result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an MD (mini-disc) or C
An MD changer system or C that can store a plurality of recording media such as D (compact disc) and select and reproduce an arbitrary recording medium from the plurality of recording media
The present invention relates to an audio playback device such as a D changer system.

[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.

Therefore, in such a disc changer system, a method is conceivable in which, even when a disc is exchanged at the request of the user, the disc requested by the user is immediately and continuously reproduced from the head without interruption. ing.

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 requested by the user is read and output from the head memory area, and the disk is replaced.
From the disk requested by the user, the data after the head data is read and written to the main memory area, and after reading all the head data from the head memory area, the data after the head data is read from the main memory area. Output.

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, even when a 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. Further, the user can know the contents of the disc in a short time.

However, the reproduction output level of the music recorded on the disc is not constant, and particularly, the head of the music,
In a relatively short portion such as a so-called intro portion, the deviation of the reproduction output level becomes large.

Therefore, in order to know the contents of each disk in a short time, for example, the head data of each disk stored in the head memory area is sequentially read out by the above-described method, and each head data is read. For example, when playing back parts one after another, a sudden change from a large playback output level to a small playback output level occurs at a break at the beginning, and a sudden change from a large playback output level to a small playback output level. In some cases, the user may feel uncomfortable.

In the method in which the head data is not stored in the memory, it takes about 10 seconds from the selection operation of the user who needs to change the disc to the actual reproduction of the music. Is relatively inconspicuous, but in the above-described method, the music is instantaneously reproduced from the user's selection operation, so that the change in the level of the reproduced output becomes sensitive.

Therefore, according to the present invention, as described above, by storing the head data in the memory in advance, even if the disk is exchanged at the request of the user, the disk requested by the user is immediately sounded from the head. In an audio reproducing apparatus such as a disc changer system in which the reproduction is continuously performed without interruption, the deviation of the reproduction output level at the head can be reduced.

[0013]

According to the present invention, in an audio reproducing apparatus capable of storing a plurality of recording media and mounting a selected one of the recording media at a predetermined position for reproduction, data read from the recording media is used. A main storage unit for sequentially writing data; and a sub-storage unit for storing data of a head portion of each recording medium. During reproduction, the head data is read out from the sub-storage unit and output, and the corresponding recording is performed. By reading the data after the head data from the medium, writing the data in the main storage means, and reading and outputting the data from the main storage means, the requested recording medium is reproduced. The head data is stored in the sub-storage means, and the maximum value of the reproduction output level immediately after storing the head data in the sub-storage means is Stored in association with the top portion data.

In the audio reproducing apparatus of the present invention configured as described above, at the time of reproduction, when the head data is read out from the sub-storage means and output, the maximum value of the immediately preceding reproduction output level and at the time of initialization of the apparatus. By reducing the deviation of the reproduction output level of the head by comparing the reproduction output level with the maximum value of the reproduction output level stored when the head data is stored in the secondary storage means, and controlling the reproduction output level based on the comparison result. Can be.

[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. The loading controller 34 determines which stage in the disc box 31 the MD1 is returned to, and the loading controller 34 attaches the MD to the player box 32, removes the MD from the player box 32, and A mechanism, such as a loading motor, not shown in the figure, for returning to the disk box 31 is controlled.

An MD 1, which is a magneto-optical disk, mounted at a predetermined position in the player box 32 is driven to rotate by a spindle motor 2. At the time of recording, the optical head 3 drives the MD 1 to heat the recording track to the Curie temperature. At the time of reproduction, the optical head 3 irradiates the MD 1 with a relatively low-level laser beam for reading information from reflected light by the magnetic Kerr effect.

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.

Although not shown in the figure, a magnetic head for applying a magnetic field modulated by data to the MD 1 during recording is arranged at a position facing the optical head 3 with the MD 1 interposed therebetween. 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, the MD 1
The information read from is supplied to the RF amplifier 7 and
By the arithmetic processing in the F amplifier 7, the RF amplifier 7
A reproduction RF signal, a tracking error signal, a focus error signal, groove information (absolute position information recorded as a pre-groove (wobbling groove) in MD1), and the like are obtained.

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 is controlled by the servo control signal to perform tracking control and focus control, and the sled mechanism 5 is controlled to move the optical head 3 in the radial direction of the MD 1. , MD1 is controlled to rotate at a constant linear speed.

The reproduced RF signal from the RF amplifier 7 is RF
The decoder 8 performs processing such as EFM demodulation and CIRC decoding, and outputs the disk data output 20 after the processing.
The system controller 11 writes the data as a memory data input 21 to a RAM (random access memory) 12 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 decoder input 23 is supplied to the audio decoder 13.

The audio decoder 13 performs a process such as inverse orthogonal transformation of the audio decoder input 23 and data expansion, and obtains a linear audio output 24. The linear audio output 24 is converted into an analog audio signal 25 by the D / A converter 14, and the analog audio signal 25 is amplified by the volume control amplifier 16 and led out to the audio output terminal 15.

The audio decoder 13 monitors the reproduction output level and writes the maximum value, that is, the maximum amplitude level, into a register 18 provided inside. As will be described later, the system controller 11 reads the value of the register 18 and controls the gain of the volume control amplifier 16 by the gain control signal 26. Further, the system controller 11 reads the position of the volume adjuster 17 arbitrarily set by the user, and controls the gain of the volume control amplifier 16.

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

The main memory area 12M further stores 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 disk data output 20 is stored are set.

The disk data output 20 is used as the memory data input 21 as the disk memory area 12M2.
The last input address in the past is stored while being incremented. As a result, the input address is 4FFFF
Is reached, the next step returns to the lower order and the address 1000
It is stored continuously from 0. 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 of the memory data output 22, the system controller 11 sets the disk memory area 12M
Stop the accumulation of data in 2. The system controller 11 reads out and takes in the memory data output 22 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 22 is incremented at a rate of 1/4 or less of the memory data input 21. Therefore, even if an error occurs in the reproduction data due to an external impact or the like, the music can be reproduced 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. By doing so, continuous reproduction can be guaranteed.

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

[Setting of Head Memory Area and Initialization of System] Further, in the MD changer system of this embodiment, as shown in FIG. 2, the address area from 80000 to FFFFF of the RAM 12 is the head memory area 1
Set as 2S. However, the main memory area 12M and the head memory area 12S may be separate memories instead of being separate areas of one memory as shown in FIG.

When the system is initialized, such as when the system is powered on, the system controller 11
The stage controller 33 and the loading controller 34 are controlled, and the MDs 1a to 1e are sequentially mounted on the player box 32, and the TOC information recorded in the innermost peripheral portion of each of the MDs 1a to 1e is sequentially stored. The head data is read.

The TOC of the read MDs 1a to 1e
The information is stored in the TOC memory area 12M1, and the head data of the MDs 1a to 1e are processed in the same manner as in the reproduction, and are processed by the system controller 11 in FIG.
Are stored in the address areas 12Sa to 12Se in the head memory area 12S as shown in FIG.

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 head data Da to De for about 14 seconds. Will be saved.

However, at the time of system initialization, if the user has requested reproduction of a specific MD, first, the MD requested by the user is mounted on the player box 32 and the MD requested by the user is loaded. The head data is stored in the head memory area 12S and read from the head memory area 12S, and the data following the head data of the MD requested by the user is written to the disk memory area 12M2 and read from the disk memory area 12M2. As a result, the MD requested by the user is
Reproduced quickly.

Then, after all the data following the head data of the MD requested by the user is stored in the disk memory area 12M2, other MDs are sequentially mounted on the player box 32, and the head data of the other MD is stored in the player box 32. The data is sequentially stored in the head memory area 12S.

However, at the time of system initialization, even if the user has requested reproduction of a specific MD,
The MD mounted on the player box 32 or the MD on the stage to be loaded
May exist, 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.

As described above, at the time of system initialization, the MD requested by the user is immediately reproduced from the head, and at the same time, the head data Da to DA of all MDs 1a to 1e are concurrently reproduced.
De is stored in the head memory area 12S.

[Reproduction after Initialization] In the system after the initialization, even if the MD is exchanged at the request of the user, the MD requested by the user is immediately and continuously reproduced from the head 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, when there is a request to reproduce the MD 1b, the system controller 11 outputs the memory data output 2
From the last read address of the memory data output 22 of the storage area 12M3 to the start address 9000 of the address area 12Sb in which the head data Db of the MD 1b in the head memory area 12S is stored.
The value is changed to 0 and the head data Db of MD1b is read.

The read head data Db is processed by the audio decoder 13 as an audio decoder input 23 in the same manner as the memory data output read from the storage area 12M3. It is converted to a signal 25.

Therefore, immediately after the user's selection operation, the head of the 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.

In parallel with this, first, the loading controller 34 removes the MD 1 a from the player box 32 and returns it to the original position of the disc box 31 according to a command from the system controller 11. 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 to move the disk box 31 depends on the amount of movement, and is about 4 to 8 seconds. In this case, since it is moved by one stage, it is about 4 to 5 seconds.

Further, in response 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.

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

Thereafter, at the time of system initialization as described above, the system controller 11 obtains the MD from the TOC information stored in the TOC memory area 12M1 in advance.
A position offset by 10000 from the head position of the disk, which is a continuation address of the head data Db of 1b, 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 data from the accessed location, ie, MD1
The data subsequent to the head data Db of b is stored as the memory data input 21 in the disk memory area 12M2 of 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 head area data Db of the MD 1b is read from the address area 12Sb in the head memory area 12S.
Are read out as the memory data output 22.

Then, about 14 hours from the time of the user's selection operation
Seconds later, when all the head data Db of the MD 1b is read, the system controller 11 outputs the memory data output 2
2 is changed from the final address 9FFFF of the address area 12Sb 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.

Therefore, the sound is reproduced continuously without interruption from the head of the MD requested by the user to the subsequent part. Subsequent processing is the same as that of the 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. Sometimes, the system controller 11 determines the output address of the memory data output 22 from the address in the address area 12Sb.
Change to the start address A0000 of the address area 12Sc in which the start data Dc of the MD1c is stored, and
The head data Dc of D1c is read. Hereafter, MD1c
Is mounted on the player box 32 to reproduce the data after the head data Dc from the MD 1c, and the method 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.

[Detection and Control of Reproduction Output Level] First, an example of detection of the reproduction output level at the time of system initialization will be described. Here, the “first MD” refers to an MD requested by the user when the user requests reproduction of a specific MD, or a preset MD (for example, a minimum or maximum stage number) in the system. MD or M attached to the player box 32 at the start of processing.
D, or the MD in the stage to be loaded at the start of the processing).

At the time of system initialization, first, the system controller 11 controls the stage controller 33 and the loading controller 34 to mount the first MD, for example, the MD 1a, on the player box 32.

After the first MD is mounted on the predetermined position of the player box 32, the system controller 11 first accesses the portion of the innermost portion of the first MD where the TOC information is recorded, and Read the TOC information of the MD and store the TOC information in the TOC memory area 12M.
Write to 1.

Next, the system controller 11 detects the disk address where the head data of the first MD is recorded from the TOC information and accesses the disk address. The maximum amplitude level value of the provided register 18 is initialized to a minimum value.

Next, after completing the access to the disk address of the head data of the first MD, the system controller 11 transfers the head data of the first MD to the first MD in the head memory area 12S. For example, if the first MD is MD
1a, the address 80 is stored in the address area 12Sa.
Save from 000. After mounting the MD, it takes about 4 seconds to store the head data.

Four seconds later, when all the head data of the first MD is stored, the system controller 11 reads the maximum amplitude level value of the register 18 at that time, and then stores the read maximum amplitude level value in the TOC. Memory area 12
It is stored at a specific position in the address corresponding to the first MD in M1.

At this point, if the user has not requested reproduction of a specific MD, the system controller 11
Controls the loading controller 34 first,
The first MD is removed from the player box 32 and returned to the original position of the disc box 31. The time required for this is about 1 second.

Next, the system controller 11 controls the stage controller 33 to
Move 1 The time required to move the disk box 31 depends on the amount of movement and is about 4 to 8 seconds. For example, the first MD is MD1a, the next MD is MD1b, and the disk box 31 is moved by one stage. If so, it takes about 4 to 5 seconds.

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

In this way, the next MD is mounted on the player box 32 at a predetermined position. The time required for this is 6 to 10 seconds.

Thereafter, as in the case of the first MD, the system controller 11 sends the TOC information of the next MD to the TOD.
The data is written to the C memory area 12M1, the maximum amplitude level value of the register 18 is initialized to the minimum value, and the head data of the next MD is stored in the address area corresponding to the next MD in the head memory area 12S. It stores from the address, reads the maximum amplitude level value of the register 18 at the time of storing, and stores it in the TOC memory area 12M1 at a specific position in the address corresponding to the next MD.

When the user has requested reproduction of a specific MD, the MD requested by the user is promptly mounted on the player box 32 and reproduced from the head as described above. Also in this case, immediately after storing the head data of the MD requested by the user in the head memory area 12S, the maximum amplitude level value of the stored section is stored in the register 1.
8 and stored in the TOC memory area 12M1.

By the same processing, all MDs 1a-1
e in the top memory area 12S
And the TOC information including the maximum amplitude level value at the head is stored in the TOC memory area 12M1, and the system initialization ends.

In the system in which the initialization has been completed, 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 reproduced from the head without interruption. In this case, the reproduction output level is controlled as follows.

As described above, in the in-vehicle MD changer system, while the user is driving the car, the first MD 1a
Playing, and want to know the contents of different MD,
An example in which the second MD 1b is selected is shown.

In this case, at the time of the selection operation by the user, the MD 1 a is mounted on the player box 32 and the MD 1 a
Since a is reproduced, the latest data of the MD 1a is stored in the storage area 12M3 in the main memory area 12M, and the maximum amplitude level value after the last exchange of the MD is written in the register 18. Have been.

In this state, when there is a reproduction request of the MD 1b, the system controller 11 first sets the register 18
Then, the output address of the memory data output 22 is read from the last read address of the memory data output 22 of the storage area 12M3, and the leading data Db of the MD1b in the leading memory area 12S is read Start address 90 of stored address area 12Sb
000, and reads the head data Db of MD1b. The head data Db of the read MD1b
Is supplied to the audio decoder 13 as an audio decoder input 23.

Next, the system controller 11 reads the maximum amplitude level value of the register 18 (hereinafter, referred to as the immediately preceding maximum amplitude level value) read before changing the output address of the memory data output 22, and initializes the system. Sometimes T
A comparison is made between the maximum amplitude level value at the head of MD1b written in the OC memory area 12M1 (hereinafter, referred to as the maximum amplitude level value at the head).

When both are the same, it indicates that the reproduction output level immediately before and the reproduction output level of the head to be output next are the same. In this case, the system controller 11 holds the gain control signal 26 given to the volume control amplifier 16 at the immediately preceding value.

On the other hand, when the immediately preceding maximum amplitude level value is larger than the head portion maximum amplitude level value, it indicates that the reproduced output level of the head portion is smaller than the immediately preceding reproduced output level. In this case, when the gain control signal 26 given to the volume control amplifier 16 is held at the immediately preceding value, the reproduced output level of the head after the output address of the memory data output 22 is changed becomes smaller, Would be uncomfortable. So, in this case,
The system controller 11 multiplies the gain control signal 26 given to the volume control amplifier 16 by (previous maximum amplitude level value) / (leading maximum amplitude level value).

Conversely, even when the maximum amplitude level value at the head is larger than the immediately preceding maximum amplitude level value, the system controller 11 sends the gain control signal 26 given to the volume control amplifier 16 to the immediately preceding value as ( It is assumed that the value is multiplied by the immediately preceding maximum amplitude level value / (the maximum amplitude level value at the head).

As described above, by comparing the immediately preceding maximum amplitude level value with the maximum amplitude level value at the head, and controlling the gain of the volume control amplifier 16, the reproduction output level is always made substantially constant. Can be.

Thereafter, the user continues to enter the next MD
Similarly, when the reproduction is requested, the maximum amplitude level value at the head of the MD previously requested by the user is compared with the maximum amplitude level value at the head of the MD requested by the user later.
The same processing is performed. Thereafter, even when the user successively requests the reproduction of the next MD, by performing the same processing, it is possible to eliminate discomfort due to a large deviation in the reproduction output level.

As described above, not only the deviation of the reproduction output level when the normal disk reproduction is changed to the reproduction of the head part, but also the deviation of the reproduction output level when the head parts of different MDs are continuously reproduced. M
In order to determine the contents of D in a short time, each MD
, The user is less likely to have discomfort due to a large change in the reproduction output level at the break of the head.

[0083]

As described above, according to the present invention, the head data is stored in the memory in advance, so that even when the recording medium is exchanged at the request of the user, the recording medium requested by the user is stored in the head. Thus, in an audio reproducing apparatus in which sound is reproduced continuously without interruption, the deviation of the reproduction output level at the head can be reduced.

[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;

[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, 13: Audio decoder, 16: Volume control amplifier, 18: Register, 31: Disk box, 32: Player box, 33: Stage controller, 34: Loading controller

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D066 BA03 BA05 BA06 5D072 AB22 BE01 CB10 5D077 AA30 AA38 BA18 BA30 BB08 EA34

Claims (2)

[Claims] 1. An audio reproducing apparatus capable of accommodating a plurality of recording media, of which a selected recording medium is mounted at a predetermined position and reproducing the data, main storage means for sequentially writing data read from the recording media, Sub-storage means for storing the data at the head of each recording medium, read and output the corresponding head data from the sub-storage means at the time of reproduction, and read the data following the head data from the corresponding recording medium. , And writes the data to the main storage means, and reads and outputs the data from the main storage means to reproduce the requested recording medium. At the time of device initialization, the head data of each recording medium is stored in the sub-storage means. And the maximum value of the reproduction output level immediately after storing the head data in the secondary storage means is associated with the head data. Audio reproducing apparatus, wherein the storing. 2. The audio reproducing apparatus according to claim 1, wherein at the time of reproduction, when the head data is read from said sub-storage means and output, the maximum value of the immediately preceding reproduction output level and at the time of initialization of the apparatus, the head data is read. An audio reproducing apparatus characterized in that the reproduced output level is controlled by comparing the reproduced output level with the maximum value of the reproduced output level stored when the sub-memory is stored in the sub-storage means.