JP2001060387A - Disk reproducing device and disk reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select music recorded in plural disks at high speed and simply and to reproduce it. SOLUTION: A TOC/voice memory 30 stores TOC information read out from plural disks 12 loaded in a disk changer unit 10. At the time, voice signals for each track of the disk 12 from which the TOC information is read out are stored in the TOC/voice memory 30 every prescribed time. When selection of music is performed reproducing the music partially and successively from the TOC/voice memory 30 and the music being reproduced at a point of time is selected by performing prescribed key input or the like from an operating section 28 by a user, a system controller 26 interrupts reproduction successively, accesses a dick 12 having a disk number in which the music selected by a user is recorded, and reproduces the music from the track having the correspondent track number.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD (Compact Disc) and an MD (MiniDisc) containing one or more music pieces.
And loading multiple optical recording media such as
The present invention relates to a disc reproducing apparatus using a disc changer for selectively reproducing music, and more particularly to a disc reproducing apparatus that facilitates a music selecting operation.

[0002]

2. Description of the Related Art Generally, one or more songs are recorded on a disc such as a CD or an MD used for music reproduction. A disc reproducing apparatus for reproducing such a disc is usually configured to be able to load a plurality of discs of the same type, and a CD changer or MCD for selectively reproducing desired music on the plurality of discs over the plurality of discs.
Some use a disk changer such as a D changer.

[0003] Such a CD changer or MD changer is capable of identifying a plurality of CDs or MDs, respectively.
It is held in a disk holding device such as a stacked magazine case or a turret type rotary table. Upon reproduction, one disc is selected from the discs, set on a turntable or the like, and reproduced by an optical pickup. With such a CD changer or MD changer, it is possible to reproduce a desired music of a desired CD or MD of a plurality of CDs or MDs, or to continuously reproduce a plurality of CDs or MDs in a desired order. .

In the conventional CD changer or MD changer, every time a disk such as a CD or MD is replaced, table of contents information recorded at the innermost peripheral position of the replaced CD or MD, that is, TOC (Table of Contents; table of contents) ) Information is read, stored in a storage unit such as a semiconductor memory, and then reproduced. That is, every time the disk is replaced, the TOC information recorded in the storage unit is rewritten.

[0005]

However, CDs and MDs
, Etc., reproduces the beginning or other parts of a plurality of music pieces recorded on the disk one by one for a predetermined short period of time (for example, about 10 seconds). Track) and a desired song can be selected. Even in a CD changer or an MD changer, a single disc can be quickly selected by skipping a track while sequentially reproducing a part of a plurality of music pieces recorded on the disc in a short time. . However, in the case of selecting songs over a plurality of discs, an operation for reading the TOC information for each disc is required as described above, so that a desired song cannot be searched in a short time by track skipping.

On the other hand, Japanese Unexamined Patent Publication No. 10-241342
Japanese Patent Laid-Open Publication No. H10-209555 discloses a technique for selecting music by playing back music in a short time, similar to the above-described track skip, by compressing and storing a part of each music recorded on a plurality of discs in a memory and sequentially reproducing them. It has been disclosed.

However, Japanese Patent Application Laid-Open No. 10-2413 discloses
In Japanese Patent No. 42, since only the abstract of the recorded music is stored in the memory, when selecting a music, the user performs an operation such as specifying and pressing the play button of the music number corresponding to the music. It had to be done and was cumbersome.

The present invention has been made in view of the above situation, and provides a disk reproducing apparatus capable of quickly and easily selecting and reproducing music recorded on a plurality of disks loaded in a disk changer. The purpose is to:

[0009]

In order to achieve the above object, a disk reproducing apparatus according to a first aspect of the present invention comprises:
A disc changer means for loading a plurality of discs each containing one or more music pieces and accessing the plurality of discs to arbitrarily reproduce the recorded music pieces; and the disc loaded in the disc changer means. Table of contents audio storage means for storing table of contents information including the recording position information of the music recorded on each of the plurality of disks and a part of the sound information for each music, and selection means for selecting the music to be reproduced from the plurality of disks And sequentially reproduces the audio information for each music stored in the table of contents audio storage means, and when the selection means selects a music during the reproduction, the disk based on the table of contents information stored in the contents audio storage means Controlling the changer means to access the disc containing the music selected by the selection means, and loading the disc into the disc changer means; And and a reproduction control means for reproducing music from the disc, characterized in that.

According to the present invention, the disc changer means loads a plurality of discs each containing one or more music pieces. The table-of-contents audio storage means stores table-of-contents information including recording position information of music pieces recorded on the plurality of discs and part of the audio information. The reproduction control means sequentially reproduces the audio information for each music stored in the table of contents audio storage means, and when the selection means selects a music piece during the sequential reproduction, controls the disc changer means and selects the music piece. The user accesses the disk containing the music and plays the music from the disk. As a result, it is possible to sequentially and partially reproduce music recorded on a plurality of disks, and it is possible to select music at high speed and easily.

More specifically, the reproduction control means holds address information indicating a recording position of each music piece based on the table of contents information, and scans the address information in synchronization with the sequential reproduction of the audio information. It is desirable to provide. As a result, it is possible to quickly identify the disk on which the music that is being sequentially reproduced is recorded, shorten the time required for reproducing the music from the disk, and select the music at high speed.

Further, the reproduction control means determines whether or not the table of contents information read from the disk loaded in the disk changer means matches the table of contents information stored in the table of contents audio storage means. If it is determined not to do so, a means for warning that the disk has been replaced may be provided.

[0013] Further, the reproduction control means may include means for defining a reading position of audio information of each music piece read from the plurality of disks to be stored in the audio index storage means.

Further, during a time period other than the time when the music is successively reproduced by the reproduction control means, part of the table of contents information and audio information is read from the disk loaded in the disk changer means, and is read into the table of contents audio storage means. Means for storing may be provided.

[0015] Further, in a disk reproducing method according to a second aspect of the present invention, a table of contents including recording position information of music recorded on each of the plurality of discs, wherein the plurality of disks recording music are held in a reproducible manner. The information and a part of the audio information of each music are stored in the memory, and the audio information of each music stored in the memory is sequentially reproduced. When a music is selected during the sequential reproduction, the music is stored in the memory. Access the disc containing the song selected based on the table of contents information,
The music is reproduced from a disc.

According to the present invention, the table of contents information recorded on the disc and a part of the audio information of each music are stored in the memory and sequentially reproduced, and the music selected during the sequential reproduction is determined based on the table of contents information. By accessing the recorded disc,
The selected music can be played from the disc.
As a result, music recorded on a plurality of discs can be selected and reproduced at high speed and easily.

Further, it may be determined whether or not the table of contents information read from the disk matches the table of contents information stored in the memory. If the table of contents does not match, a warning that the disk has been replaced may be issued. Furthermore, during time periods other than the time of sequential reproduction of music, part of the table of contents information and audio information may be read from the plurality of disks and stored in the memory.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a disc reproducing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a disk reproducing apparatus according to an embodiment of the present invention. As shown
The disc reproducing apparatus includes a disc changer unit 10, a turntable 14, a disc motor 16
, Optical pickup 18 and disk signal processing unit 22
, A servo controller 24, a system controller 26, an operation unit 28, a TOC / voice memory 30, and a display 36. The disk signal processing unit 2
2, the servo controller 24, and the system controller 26 constitute the reproduction control unit 20.

The disc changer unit 10 includes a CD
And a plurality of disks 12 such as MDs and MDs. The disk 12 to be reproduced is taken out and set on the turntable 14 or the disk clamp mechanism. At this time, the disk changer unit 10 takes out the specified disk from the plurality of disks 12 according to the disk selection signal given from the system controller 26 and mounts the disk on the turntable 14 (or disk clamp mechanism).

The turntable 14 rotatably holds the disk 12 such as a CD or an MD and an optical pickup 18.
This is to enable reading by the. In addition,
The turntable 14 is not limited to the one on which the disk 12 is placed and made rotatable, but may be a disk clamp mechanism that clamps the center of the disk 12 and holds it rotatably.

The disk motor 16 is used for the turntable 1
By rotating the disk 12 held by the optical pickup 4, reading by the optical pickup 18 is enabled. Here, the disk motor 16 drives the turntable 14 to rotate according to a disk rotation signal received from the servo controller 24.

The optical pickup 18 reads the recorded information by irradiating the disk 12 with a laser beam. Here, the optical pickup 18 performs operations such as position change and laser light irradiation in accordance with a pickup control signal including signals such as focus, tracking, and feed control from the servo controller 24, and transfers recorded information of the disk 12 to the optical pickup 18. The data is read and sent to the disk signal processing unit 22.

The playback control unit 20 controls each of the discs 1 at the time of music selection.
2 for performing sequential partial reproduction of the recorded music and normal reproduction of the selected music. Here, the disc signal processing unit 22 performs the recording of the TOC information in the TOC / audio memory 30 and the partial reproduction information of each music and the normal reproduction.
The signal read from the disk 12 is adjusted to generate a reproduction output. Also, the disc signal processing unit 22 performs the TOC /
At the time of sequential partial reproduction of each music from the audio memory 30, TO
The signal read from the C / audio memory 30 is adjusted to generate a sequential partial reproduction output. Further, the disc signal processing unit 22 adjusts the signal read from the disc 12 to generate the TOC information and the subcode signal when the TOC information and the partial reproduction information of each music piece are recorded in the TOC / audio memory 30, and the TOC information is generated. / Supply to the system controller 26 for recording in the audio memory 30.

The servo controller 24 supplies a disk rotation control signal to the disk motor 16 under the control of the system controller 26, and controls the rotation of the disk motor 16. Also, servo controller 2
4 supplies a pickup control signal including a focus, tracking, and feed signal to the optical pickup 18 to control the focus, tracking, and feed operations of the optical pickup 18.

The system controller 26 includes a program memory 32 and an operation unit 34. The system controller 26 sequentially reads out the programs stored in the program memory 32,
4 to control the operation of the entire disc reproducing apparatus. Here, the system controller 26 operates in accordance with signals such as various operation instructions from the operation unit 28 and a music selection designation operation at the time of music selection. In addition, the system controller 26 sets the TOC /
When the TOC information and the partial reproduction information of each music piece are recorded in the audio memory 30, the TOC information and the subcode output from the disk signal processing unit 22 and the reproduction output of the disk signal processing unit 22 are written in the TOC / audio memory 30. . Further, at the time of sequential partial reproduction of the recorded music, the system controller 26 sequentially reads out audio information of a part of each music written in the TOC / audio memory 30 in a predetermined order, and provides the reproduced audio information. The TOC information is sequentially scanned in accordance with the state of the sequential partial reproduction of the music, and the counter function using the arithmetic unit 34 is operated in synchronization with the scanning to obtain reproduction disk and track information corresponding to the partial reproduction.

The operation unit 28 includes a system controller 26
For inputting various operation instructions, a music selection instruction at the time of sequential partial reproduction, and a disk number for designating a disk at the time of manual music selection and a track number for designating music in the disk.

The TOC / audio memory 30 stores TOC information and partial reproduction information of each music.

The display 36 is a system controller 26
Based on the counter function described above, information such as a disc number and a track number indicating a music piece being partially played back, being selected, and being played back normally is displayed.

Next, the operation of the disk reproducing apparatus having the above configuration will be described. This disc playback device enables sequential partial playback of the beginning of a song and the like in the same manner as when selecting a song from a single disc, even when selecting a song from a plurality of discs. It is a device that can do.

When a plurality of disks 12 such as CDs and MDs are loaded into the disk changer unit 10 and set in the disk reproducing apparatus, the system controller 2
Step 6 starts the disk information recording process shown in FIG. When the disc information recording process is started, the system controller 26 sends a disc selection signal to the disc changer unit 10 to set one of the loaded discs 12 such as a CD or MD on the turntable 14 ( Step S1).

The system controller 26 controls the disk motor 16 to rotate the turntable 14 via the servo controller 24 and controls the optical pickup 18 to control the TOC of the disk 12 set on the turntable 14. Information is read (step S2).

The optical pickup 18 sends the read TOC information of the disk 12 to the disk signal processing unit 22.
The disc signal processing unit 22 adjusts the TOC information received from the optical pickup 18 into a format recordable in the TOC / audio memory 30, and writes the information in the TOC / audio memory 30 (step S3). At this time, the TOC / audio memory 30
Are received from the disk signal processing unit 22 and the disk numbers indicating the holding positions of a plurality of disks 12 such as CDs or MDs loaded in the disk changer unit 10 in the TOC storage area in the TOC / audio memory 30. The information is recorded in association with the TOC information.

Further, the system controller 26 controls the turntable 14 and the optical pickup 18 via the servo controller 24, and outputs the audio signal for each track of the disk 12 from which the TOC information has been read for a predetermined time (for example, (For 10 seconds) (step S
4).

The optical pickup 18 sends the read audio signal to the disc signal processing unit 22, adjusts the read audio signal to a format recordable in the TOC / audio memory 30, and writes it into the audio storage area in the TOC / audio memory 30 (step). S5).

Here, the system controller 26 sets T
For each track of the audio signal stored in the OC / audio memory 30, identification information indicating the disk number and track number of the track, and address information indicating the section position where the audio signal was written in the TOC / audio memory 30; Is stored in an internal memory (not shown) of the system controller 26 (step S6).

Thereafter, the system controller 26 determines whether or not the TOC information of all the disks 12 loaded in the disk changer unit 10 and the audio signal for each track have been read (step S7).

The system controller 26 controls all the disks 12 loaded in the disk changer unit 10.
If it is determined that the reading of the TOC information and the audio signal from has not been completed (NO in step S7), the process returns to step S1 and the disk 12 to be set on the turntable 14 is replaced, and the TOC information and the Continue reading the audio signal.

On the other hand, when the system controller 26 determines that the TOC information and the audio signal for each track have been read from all the disks 12 (YE at step S7).
S), the disk information recording process ends.

Thus, the TOC / voice memory 30
The TOC information of the disk 12 loaded in the disk changer unit 10 and a portion corresponding to a predetermined time in the audio signal for each track of each disk 12 are recorded. Thereby, the disc changer unit 10
It is possible to successively and partially reproduce all the discs 12 loaded in the.

Next, when the user operates the operation unit 28 to instruct music selection while performing sequential partial reproduction, the system controller 26 starts the partial reproduction music selection processing shown in FIG.

When the partial reproduction music selection process is started, the system controller 26 reads out the audio signal recorded in the audio storage area of the TOC / audio memory 30 and sends it to the disk signal processing unit 22 to convert it into a reproducible format. Output (step S10).

At this time, the system controller 26 activates a counter function in the system controller 26 in synchronization with the increase of the address number in the TOC / audio memory 30 from which the audio signal is read out. The count is incremented from the beginning address of the reproduction start track stored therein (step S1).
1). As a result, the recording position of each song on the disc 12 is specified and played back, and when the user instructs to select the song, the song can be quickly played back from the disc 12.

While sequentially reproducing the audio signal recorded in the TOC / audio memory 30 in this manner, the user
By operating the operation unit 28, it is possible to instruct to reproduce the music being reproduced from the disc 12. Then, the system controller 26 determines whether or not an instruction to select the music being reproduced at that time is received from the operation unit 28 (step S12).

When the system controller 26 determines that the instruction to select the music being reproduced has not been received (NO in step S12), the sequential reproduction of the audio signal recorded in the TOC / audio memory 30 is completed. It is determined whether it is (Step S13). The system controller 26
If it is determined that the sequential reproduction of the audio signal has not been completed (NO in step S13), the process returns to step S10 to continue the sequential partial reproduction.

On the other hand, when the system controller 26 determines that the sequential reproduction of the audio signal has been completed (step S1).
(YES at 3), and ends the partial reproduction music selection process.

When the system controller 26 determines in step S12 that an instruction to select the music being played has been received from the operation unit 28 (step S1).
(YES in 2), the sequential reproduction is interrupted, and the counting of the counter function inside the system controller 26 is stopped (step S14). Then, the system controller 26 reads the identification information and the address information stored in the memory in step S6 of the disk information recording process, and determines the user address from the read address value of the TOC / audio memory 30 at the time when the sequential partial reproduction is stopped. Specifies the recording position (disc number, track number) of the selected music (step S15).

The system controller 26 controls the disk changer unit 10 to access the disk 12 having the specified disk number (step S1).
6). That is, the optical pickup 18 is moved to the innermost circumference, the disk 12 is rotated by the turntable 14, a focus search is performed, and a part of the TOC information of the disk 12 of the corresponding disk number is read. At this time, since the TOC information is previously stored in the TOC storage area inside the TOC / audio memory 30, the entire TOC information from the disk 12 is not re-read.

The system controller 26 controls the disk T of the corresponding disk number in the TOC / audio memory 30.
T read out OC information and read out by focus search
It is compared with a part of the OC information to determine whether or not the discs are the same (step S17).

When the system controller 26 determines that the disks are the same disk (YE in step S17)
S) Assuming that the audio signal can be reproduced (step S1)
8) The state shifts to the reproduction state of the selected music.

On the other hand, when the system controller 26 determines that the disks are not the same disk (N in step S17)
O) It is assumed that the disc loaded in the disc changer unit 10 may have been replaced and the audio signal cannot be reproduced (step S19). And
The system controller 26 overwrites the TOC information read from the disk 12 in step S16 with the TOC information of the same disk number in the TOC information storage area in the TOC / audio memory 30 (step S2).
0). Further, the system controller 26 displays a warning on the display 36 or the like in order to notify the user that the music selected by the user cannot be reproduced (step S21), and ends the partial reproduction music selection processing.

The contents stored in the TOC / audio memory 30 may be reset when, for example, a magazine case or a turret type rotary table is ejected from the disc changer unit 10. At this time, the TOC / voice memory 3
All TOC information and audio information stored in 0 are reset and cleared. The system controller 26 executes the above-described disc information recording process each time a magazine case or a turret type rotary table is set in the disc changer unit 10 and converts the TOC information of the disc 12 or a part of the audio signal into the TOC / audio data. Memory 30
To be memorized.

As described above, according to this disk reproducing apparatus, the TOC / audio memory 30 stores the audio information for partial reproduction and the TOC information, so that the music selection operation of the disk 12 can be easily performed. Therefore, when selecting a song from among songs recorded on a plurality of disks 12, it is possible to perform agile song selection by sequential partial sound reproduction in the same manner as when selecting a song from songs recorded on the same disk. . Further, the TOC / audio memory 30 can store the TOC information, automatically specify the position of the music piece instructed to be selected by the operation unit 28, and reproduce the music from the disc 12. Therefore, the user can select a music piece and play it from the disc 12 by a simple operation of the operation unit 28.

The present invention is not limited to the above embodiment, and various modifications and applications are possible. For example, in the above embodiment, the TOC information and the partial audio information are stored at any time on the assumption that the capacity of the TOC / audio memory 30 is sufficient. But especially TOC
If the capacity of the voice storage area in the voice memory 30 is limited, the following processing may be executed.
That is, first, the system controller 26 reads out the TOC information of all the loaded disks 12, and obtains the total number of tracks in each TOC information and the capacity of the audio storage area of the TOC / audio memory 30. next,
The system controller 26 preliminarily determines a storable time for each track, and stores the sound information of each music track in the sound storage area of the TOC / sound memory 30 for each time. By doing so, TOC /
Even when the capacity of the audio memory 30 is limited, it is possible to successively and partially reproduce all of the songs recorded on the disk 12, and it is possible to select music quickly and easily as in the case of selecting music from one disc. Can be.

When storing the partial sound of each music track, an arbitrary part of the music may be stored instead of the beginning of the music. In this case, based on each track information in the TOC information, the system controller 26, for example, halves the reproduction time of the track.
The voice information may be read out from the location and stored in the TOC / voice memory 30. This makes it easier for the user to identify the music.

Further, when a disc changer with a large number of reproducible discs is used, it may take some time to store the sound and the TOC information. In such a case, the sound and the TOC are stored by using a special timer operation such as storing the sound and the TOC information of all the disks in the disk changer unit at an arbitrary time after the power of the device is turned off. Information may be stored.

[0057]

As described above, according to the present invention, a partial selection is sequentially performed over a plurality of disks loaded in a disk changer, so that the same music selection as in the same disk can be performed quickly and easily. It is possible to provide a disk reproducing device that allows an operation to be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a disk reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a disk information recording process.

FIG. 3 is a flowchart illustrating a partial reproduction music selection process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Disc changer unit 12 Disk 14 Turntable 16 Disk motor 18 Optical pick-up 20 Reproduction control part 22 Disk signal processing part 24 Servo controller 26 System controller 28 Operation part 30 TOC / audio memory 32 Program memory 34 Operation part 36 Display

Claims (8)

[Claims] 1. A disc changer means for loading a plurality of discs each containing one or more tunes, accessing said plurality of discs and arbitrarily reproducing the recorded tunes, and said disc changer. A table-of-contents storage unit for storing table-of-contents information including the recording position information of the music recorded on each of the plurality of disks loaded in the means and a part of the sound information for each of the music; and a music to be reproduced from the plurality of disks. Selecting means for selecting, and sequentially reproducing the audio information for each music stored in the table of contents audio storage means, and when the selection means selects a music during reproduction, the table of contents information stored in the table of contents audio storage means Controlling the disc changer means on the basis of the disc changer to access the disc on which the music selected by the selecting means is recorded, And a reproduction control means for reproducing music from a disc loaded in the unit, the disk reproducing apparatus, characterized in that. 2. The reproduction control means holds address information indicating a recording position of each music piece based on the table of contents information,
The disk reproducing apparatus according to claim 1, further comprising: means for scanning the address information in synchronization with the sequential reproduction of the audio information. 3. The reproduction control means determines whether or not the table of contents information read from the disk loaded in the disk changer means matches the table of contents information stored in the table of contents audio storage means. The disc reproducing apparatus according to claim 1, further comprising a unit that warns that the disc has been replaced when it is determined that the disc has not been replaced. 4. The apparatus according to claim 1, wherein said reproduction control means includes means for defining a reading position of audio information of each music piece read from said plurality of discs to be stored in said audio index storage means. 4. The disc reproducing apparatus according to any one of claims 3 to 3. 5. The table of contents information and part of audio information are read from a disk loaded in the disk changer means during a time period other than the time when the music is successively reproduced by the reproduction control means, and the contents are stored in the table of contents audio storage means. The disk reproducing apparatus according to claim 1, further comprising a storage unit. 6. A plurality of discs on which music is recorded are held in a reproducible manner, and a table of contents information including recording position information of the music recorded on each of the plurality of discs and a part of audio information for each music are stored in a memory. Storing and sequentially reproducing the audio information for each music stored in the memory, and when a music is selected during the sequential reproduction, a disk containing the music selected based on the table of contents information stored in the memory And reproducing the music from the disc by accessing the disc. 7. It is determined whether or not the table of contents information read from the disk matches the table of contents information stored in the memory, and if not, a warning that the disk has been replaced is issued. 7. The disc reproducing method according to claim 6, wherein: 8. The system according to claim 6, wherein, during a time period other than the time of successive reproduction of music, a part of the table of contents information and the audio information is read from the plurality of discs and stored in the memory. Disc playback method.