JP4049507B2 - Recording medium replacement method for disk-type recording medium playback apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a playback apparatus for playing back a disk-type recording medium such as a CD, MD, DVD, or MO.
[0002]
[Prior art]
Conventionally, a disk-type recording medium playback device (hereinafter referred to as “playback”) that can continuously play back a plurality of disks using a magazine that stores a plurality of disk-type recording media (hereinafter referred to as “disks”). Equipment ").
In the above conventional reproducing apparatus, various methods have been proposed as a method for managing a plurality of disks stored in the apparatus. As one of them, there has been proposed a method of assigning a disk number to each disk loaded in a magazine and managing the disk according to the disk number (for example, JP-A-10-269740).
[0003]
An example of a management method using disk numbers will be described with reference to FIG.
FIG. 1A shows a procedure (store mode) when a disc is inserted. The disc inserted first is assigned a disc number {circle over (1)} and is loaded into the reproducing unit 5. Next, the inserted disk is assigned a disk number {circle over (2)} and is loaded into the first storage section 6 of the magazine 4. The disc inserted last is assigned a disc number {circle over (3)} and is loaded into the second storage section 7 of the magazine 4. The third storage unit 8 is empty.
[0004]
Thereafter, each disk is managed according to the disk numbers {circle around (1)} to {circle around (3)}, and in the example shown, the disk number {circle around (1)} is reproduced first. After the reproduction is completed, the vacant third storage portion 8 is loaded as shown in FIG. Subsequently, the discs are reproduced in the order of disc numbers (2) and (3).
As shown in FIG. 1C, when a new disc is inserted with the discs loaded in all the storage units 6 to 8, the inserted disc is assigned the disc number {circle over (4)}, and the playback unit 5 to be reproduced. In this way, a state in which the disc is loaded in all of the magazine 4 and the reproducing unit 5 is called full loading.
[0005]
In the fully loaded state, as shown in FIG. 1D, when one disk loaded in the magazine 4, for example, the disk number {circle over (1)} is ejected, the disk number {circle around (4)} whose reproduction has ended is It is rewritten to 1 ▼ and stored in the third storage unit 8.
[0006]
[Problems to be solved by the invention]
In the state shown in FIG. 1D, in the automatic playback mode, the disc in the next playback order is sent to the playback unit 5 for playback. Here, it is assumed that the disc to be reproduced is disc number {circle around (1)} as shown in FIG. Since this disc number {circle over (1)} is the disc (disc number {circle over (4)}) reproduced immediately before, the same disc will be reproduced continuously. This makes the user uncomfortable.
[0007]
The present invention allows a plurality of discs to be exchanged and played back, and manages the discs by assigning disc numbers to the discs so that the playback order is properly selected even when the discs are ejected when fully loaded. It is intended to do.
[0008]
[Means for Solving the Problems]
The present invention has been made to achieve the above object. The present invention is directed to a playback apparatus that can store a plurality of disks in a magazine, exchange the plurality of disks, and perform management by assigning a disk number to each disk.
According to the present invention, when a disc is ejected when the disc is fully loaded, the reproduced disc is accommodated in an accommodating portion vacated by ejection. At this time, if the ejected disc is designated as the disc number to be reproduced next, the reproduced disc number is rewritten to a different disc number. As a result, it is possible to prevent the previously played disc from being played continuously.
[0009]
The disk number to be rewritten may be a numerical value within the maximum number that can be stored in the magazine, or a numerical value that exceeds it. In the former case, the reproduced disk number must be a number other than the ejected disk number, and the management of the reproduction order is complicated, but the management of the disk number is easy. In the latter case, the number management is complicated, but the reproduction order is simple.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a cross-sectional view showing the structure of the disk-type recording medium playback apparatus.
A disc insertion slot 3 is formed on the front surface of the housing 2 of the reproducing apparatus 1. A magazine 4 capable of storing a plurality of disks is disposed in the upper part on the back side inside the housing 2. The reproducing unit 5 is disposed at the lower part of the magazine 4. The magazine 4 includes four storage portions 6, 7, and 8 for storing disks in the horizontal direction.
[0011]
An elevating unit 9 is disposed on the front side of the reproducing unit 5 and the magazine 4. The elevating unit 9 conveys the disc among the insertion port 3, the magazine 4, and the reproducing unit 5.
Since the details of the above structure are conventionally known, further explanation is omitted.
FIG. 3 shows a circuit configuration of the playback apparatus 1.
[0012]
The control unit 11 is constituted by a CPU and is disposed at an appropriate location in the housing 2. The control unit 11 executes various controls according to the program recorded in the memory 12. The operation unit 13 includes a push button switch disposed on the front panel of the housing 2. A signal corresponding to a user operation is output from the operation unit 13 to the control unit 11.
[0013]
The display unit 14 includes a liquid crystal panel, LEDs, and the like disposed on the front panel of the housing 2, and displays various information such as the status of the playback device 1 to the user under the control of the control unit 11. The playback unit 5 performs playback processing of the loaded disc under the control of the control unit 11. The elevating unit 9 conveys the disc among the insertion slot 3, the magazine 4, and the reproducing unit 5 under the control of the control unit 11.
[0014]
Next, two examples of the processing of the control unit 11 will be described.
(Embodiment 1)
FIG. 4 shows the management table and the actual state of the disk.
The management table (A) records the correspondence between the disc number, the pointer indicating the playback order, and the ejection flag indicating that the disc has been ejected. As described above, the disk number is operated regardless of the order of the storage units 6 to 8 of the magazine 4. (B) shows the actual relationship between the magazine 4 and the reproducing unit 5 and the disk number. In the example shown in the figure, the disk number {circle over (1)} is ejected from the fully loaded state (FIG. 1C), and the next reproduced disk is {circle over (1)}. Note that various methods have been proposed in the past for the reproduction order determination method using the pointer in the management table, the designated disk transport method, and the like.
[0015]
The process by the control part 11 is demonstrated with the flowchart of FIG.
In step S11, it is determined whether or not the disk is fully loaded. In step S12, it is determined whether or not the disk in the magazine 4 has been ejected. When the conditions of steps S11 and S12 are satisfied, the process proceeds to step S13. If any condition is not satisfied, the process returns to step S11. Here, when other operations are performed on the operation unit 13, corresponding processing is performed. Since other processes are not different from the conventional processes, the description thereof is omitted here.
[0016]
In step S13, it is checked whether or not the ejected disc number is a number selected for the next reproduction. This is determined based on whether or not the disk number on which the ejection flag is set matches the disk number indicated by the pointer in the management table.
The case where there is a discrepancy in step S13 is a case where the disc number {circle around (1)} is ejected and the disc number {circle around (2)} is the next playback disc as shown in FIG. In this case, in step S14, the reproduced disc is rewritten from the disc number (4) to the ejected disc number (1). Thereafter, the process proceeds to step S17, and the disk number (2) indicated by the pointer is conveyed to the reproducing unit 5 and reproduced. In this case, the disc that was played back immediately before and changed to the disc number {circle over (1)} does not continue to be played back last time.
[0017]
The case of coincidence in step S13 is a case where the disc number {circle around (1)} is ejected and the disc number {circle around (1)} is the next playback disc as shown in FIG. In this case, in step S15, the reproduced disk number (4) is rewritten to a number other than the ejected disk number (1), for example, the disk number (2). In step S16, the rewrite target number, that is, the original disk number {circle around (2)} is rewritten to the ejected disk number {circle around (1)}.
[0018]
Thereafter, in step S17, the disk number (1) indicated by the pointer is reproduced. At this time, since the disc to be reproduced has the disc number {circle around (2)} before rewriting and the reproduced disc has the disc number {circle around (4)} before rewriting, both are different. Therefore, it is possible to prevent the disc played immediately before from being played back continuously.
[0019]
(Embodiment 2)
FIG. 8 shows an actual state of the management table and the disk in the second embodiment.
The management table is different from the management table of FIG. 4 described above in that a rewrite flag is added. This flag is composed of 2 bits. When the disk number is rewritten, the flag is changed from “00” to “01”, and when the disk number is rewritten, the numerical value increases to “10” and “11”. In the example shown in the figure, the disk number {circle around (1)} is the ejected disk, and the next disk to be reproduced is the disk number {circle around (1)}. Further, the disk numbers {circle around (1)} and {circle around (2)} are not rewritten, so the flag is “00”. {Circle over (3)} has been rewritten previously and becomes “01”.
[0020]
The operation of the control unit 11 will be described using the flowchart of FIG.
Step S11 and step S12 are the same as the flow of FIG. If the conditions in steps S11 and S12 (full loading and disc ejection) are satisfied, the process proceeds to step S21.
In step S21, the reproduced disk number is rewritten to the ejected disk number. In the example of FIG. 8, as shown in FIG. 10, the reproduced disk number (4) is rewritten to the ejected disk number (1). As a result, the rewrite flag of the disk number {circle over (1)} becomes “01”, and the rewrite flag of the disk number {circle around (3)} that has been “01” so far advances to “10”.
[0021]
In step S22, it is checked whether or not the next playback disc number matches the rewritten disc number. This is determined based on whether or not the disk number of the rewrite flag indicating “01” is the disk number indicated by the pointer in the management table.
An example in which there is a mismatch in step S22 is shown in FIG. FIG. 11 differs from FIG. 10 in that the disk number {circle over (1)} is rewritten and the pointer indicates the disk number {circle around (2)} as the disk to be reproduced next. In this case, since the reproduced disk number {circle around (4)} is rewritten to the disk number {circle around (1)}, the flag becomes “01”. The rewrite flag for disk number {circle over (3)} proceeds to “10”.
[0022]
If this is not the case, the disk number (2) indicated by the pointer is reproduced in step S23. The disc number {circle around (2)} reproduced here is not the disc number {circle around (1)} reproduced immediately before, so that the same disc is not reproduced continuously.
An example of a match in step S22 is shown in FIG. The ejected disk has a disk number (1), and the pointer indicates the disk number (1) as the disk to be reproduced next. In this case, since the disc number {circle around (1)} is ejected, the reproduced disc number {circle around (4)} is rewritten to the disc number {circle around (1)}, and the flag becomes “01”. The rewrite flag for disk number {circle over (3)} proceeds to “10”.
[0023]
In the case of coincidence, in step S24, the next reproduction disc number is changed to other than the rewrite disc number (1). In the case of FIG. 12, the pointer is moved to the next disk number (2) as shown in FIG.
In step S25, it is checked whether or not the changed disk number newly designated by the pointer matches the number rewritten in the past. In this check, if the flag is “00”, it is determined that there was no past rewriting.
[0024]
The case where there is a mismatch in step S25 is a case where the pointer indicates the disk number {circle over (2)} and the flag is “00” as shown in FIG. In this case, the disc number (2) indicated by the changed pointer is reproduced in step S26. Since this disk is not rewritten, it is not the disk number {4} reproduced immediately before. Therefore, the same disc is not continuously reproduced.
[0025]
An example of matching in step S25 is shown in FIG. FIG. 14 shows “10” indicating that the flag of disk number {circle over (2)} indicated by the pointer changed from the state of FIG. 12 has been rewritten in the past. In this case, in step S27, it is checked whether or not there is a disk in the magazine 4 that has not been rewritten, that is, a disk whose flag is “00”.
[0026]
If there is a disk that has not been rewritten in step S27, the pointer is changed to the disk number. In the example of FIG. 14, since the flag of disk number {circle around (3)} is “00”, the pointer is changed to disk number {circle around (3)}. As a result, the non-rewritable disc number {circle over (3)} is reproduced in step S28, so that the same disc is prevented from being reproduced continuously.
[0027]
If there is no disk that has not been rewritten in step S27, the pointer is changed to the disk number that is rewritten first in the magazine 4 and the disk is reproduced. In the example of FIG. 15, since there is no flag indicating “00”, the pointer is changed to the disk number {circle around (3)} of the flag “11” indicating the largest value. As a result, the disc number {circle around (3)} reproduced first is reproduced.
[0028]
According to the second embodiment, what is reproduced after the disc is ejected is an unreproduced disc or the oldest reproduced one. Therefore, the user does not feel uncomfortable that the same disc is repeatedly played.
As described above, the two embodiments have been described. When the disc number {circle around (4)} of the disc that has been played is rewritten with a new disc number, a numerical value other than 1 to 4 already used, for example, 5 to 7 is set. It can also be used. In this case, disk management can be performed according to the disk number. This eliminates the need to provide a rewrite flag in the management table.
[0029]
In this case, the numerical value displayed on the display unit 14 is (rewrite number-N) for the rewritten disc number. The numerical value N here is a value obtained by adding 1 to the number of magazines 3 stored, and is 4 in the example described above.
[0030]
【The invention's effect】
According to the present invention, in a playback apparatus that allows a plurality of discs to be exchanged and played back and manages the plurality of discs by assigning disc numbers, the playback order is properly selected even when the discs are ejected when fully loaded. Can be.
[Brief description of the drawings]
FIG. 1 shows disk number management in a conventional playback apparatus.
FIG. 2 is a cross-sectional view showing the structure of a playback apparatus to which the present invention is applied.
FIG. 3 is a diagram showing a circuit configuration of the playback apparatus in FIG. 2;
4 is a diagram showing a management table and a disk state in the playback apparatus of FIG. 2; FIG.
FIG. 5 is a flowchart showing an operation when the table of FIG. 4 is used.
6 is a diagram (part 1) showing a management table and a disk status in the middle of processing in FIG. 5; FIG.
7 is a diagram (part 2) showing the management table and the disk status in the middle of the processing in FIG. 5; FIG.
FIG. 8 is a diagram showing the state of a management table and a disk in a second example of the present invention.
FIG. 9 is a flowchart showing an operation when the table of FIG. 8 is used.
FIG. 10 is a diagram showing a management table and disk status in the middle of processing in FIG. 9 (part 1);
FIG. 11 is a diagram (part 2) illustrating the management table and the disk status in the middle of the processing in FIG. 9;
FIG. 12 is a diagram showing a management table and disk status in the middle of processing in FIG. 9 (part 3);
13 is a diagram showing a management table and disk status in the middle of processing in FIG. 9 (part 4);
FIG. 14 is a diagram showing a management table and disk status in the middle of processing in FIG. 9 (part 5);
FIG. 15 is a diagram showing a management table and disk status in the middle of processing in FIG. 9 (part 6);
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Playback apparatus 2 ... Housing | casing 3 ... Insert port 4 ... Magazine 5 ... Playback part 6 ... 1st accommodating part 7 ... 2nd accommodating part 8 ... 3rd accommodating part 9 ... Elevating part 11 ... Control part 12 ... Memory 13 ... operation unit 14 ... display unit

Claims (5)

Storage means having a plurality of storage units capable of storing recording media;
The recording medium stored in the storage unit is exchanged for reproduction, and when the recording medium is stored in all of the plurality of storage units, the recording medium inserted from the insertion slot can be mounted and played back. Regenerating means,
Control means for controlling the playback order of the recording media played back by the playback means,
The control means includes any one of the recording media stored in the storage means in a state where the recording medium is stored in all of the plurality of storage portions of the storage means and the recording medium is mounted on the reproducing means. When the recording medium is ejected from the insertion slot, after the reproduction of the recording medium attached to the reproducing means is completed, the recording medium attached to the reproducing means is controlled to be accommodated in the accommodating means from which the recording medium has been ejected. And a playback apparatus that controls the playback means to load a recording medium other than the recording medium mounted on the playback means stored in the storage means. The control means includes
Attaching management information corresponding to each recording medium in the playback device,
2. The reproducing apparatus according to claim 1, wherein the management information corresponding to the recording medium that has been reproduced is rewritten, and the reproduction order is controlled based on the management information. The control means includes
3. The reproducing apparatus according to claim 2, wherein the management information corresponding to the recording medium for which reproduction has been completed is rewritten to management information other than the management information scheduled to be reproduced next. The control means includes
3. The control is performed so that a recording medium other than the recording medium in which the management information has been rewritten most recently is loaded in the reproducing means after the reproduction of the recording medium loaded in the reproducing means is completed. Or the reproducing apparatus of 3. Storage means having a plurality of storage units capable of storing recording media;
The recording medium stored in the storage means is exchanged for reproduction, and when the recording medium is stored in all of the plurality of storage units, the recording medium inserted from the insertion slot can be mounted for playback. Regenerating means,
Control information that attaches management information indicating the reproduction order to each recording medium in the apparatus, and controls the reproduction order of the recording media reproduced by the reproduction means based on the management information,
The control means discharges any of the recording media stored in the storage section in a state where the recording medium is stored in all of the plurality of storage sections of the storage means and the recording medium is mounted on the reproducing means. In this case, after the reproduction of the recording medium mounted on the reproducing unit is finished, the recording medium mounted on the reproducing unit is controlled to be stored in the storage unit from which the recording medium has been discharged, and the reproducing unit A recording apparatus that rewrites management information of a recording medium mounted on the recording medium to management information different from the management information of the ejected recording medium.

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