JP2000163855A - Medium reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce plural recording media different in reproducing system based on a preferential reproducing system specified arbitrarily externally. SOLUTION: A preferential medium is set by operating a switch 12, its contents are stored in a memory 13, setting of a preferential medium is not fixed, a user can vary arbitrarily in accordance with use frequency of a recording medium 2 and the like. Therefore, such redundancy can be eliminated that needless processing steps are repeated whenever a recording medium 2 is exchanged, operability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium reproducing apparatus capable of reproducing a plurality of recording media having different reproduction systems according to a priority reproduction system optionally designated from the outside.

[0002]

2. Description of the Related Art As a medium reproducing apparatus capable of reproducing a plurality of recording media having different reproduction methods, for example, there are two kinds of discs: a CD-ROM disc which is a read-only recording medium and a CD-RW disc which is a rewritable recording medium. There was a device to reproduce. FIG. 4 is a circuit diagram showing a conventional optical disk reproducing apparatus to which this type of medium reproducing apparatus is applied. Since a CD-ROM disc and a CD-RW disc have different light reflectivities of laser light used for reading on the disc surface, the optical disc reproducing apparatus 1 can reproduce the two types of recording media 2 optimally.
The dedicated reading circuits 3 and 4 are built in, and a reading means switching circuit 6 is provided so that the appropriate reading circuit 3 or 4 is selected according to the type of the recording medium 2 mounted. That is, software for discriminating the disc type is installed in the control CPU 7 so that anyone can use the CD-ROM disc and the CD-RW disc regardless of the disc type. The reading means switching circuit 6 selects the appropriate reading circuit 3 or 4 in accordance with the condition.

At the time of reproducing a disk, an optical disk reproducing apparatus 1 irradiates a recording medium 2 such as a CD-ROM or a CD-RW with a laser beam, and reflects reflected light from the recording medium 2 into a CD.
-Reading is performed by either the ROM reading circuit 3 or the CD-RW reading circuit 4 and the read result is supplied to the data processing circuit 5 for data processing. The data processing result of the data processing circuit 5 is transmitted to an externally connected host computer (not shown). Hereinafter, a conventional disc type discriminating operation will be described with reference to a disc type discriminating flowchart shown in FIG. Note that, in the following description, a playback system in which priority application is specified in advance from among a plurality of playback systems immediately after a recording medium is mounted is called a priority playback system, and playback is performed by this priority playback system. The recording medium to be used is called a priority medium.

Now, it is assumed that a CD-ROM disk is designated as a priority medium, and that a CD-ROM disk is mounted as a recording medium 2 on the optical disk reproducing apparatus 1. In this case, the control CPU 7 that performs overall control of the apparatus in accordance with the disk type discrimination software or the like firstly reads the reading means switching circuit 6 in step (501) shown in FIG.
To the CD-ROM specified in advance as the priority medium.
Select the CD-ROM reading circuit 3 for reading the
The W reading circuit 4 is set to a non-selected state. Control CPU
7 is a recording medium 2 (in this case, a CD-ROM disk)
Is irradiated with a laser beam, and the reflected light reflected from the recording medium 2 with a predetermined light reflectance is selected from a CD-ROM.
Substantial reproduction control is started so that the reading circuit 3 reads the data. First, in step (502), the CD-RO
The read output of the M read circuit 3 is processed by the data processing circuit 5 to determine whether the data has been read correctly.
Since the CD-ROM reading circuit 3 constitutes a dedicated reproducing means for the CD-ROM disk, the control CPU 7 receives the judgment in the judgment step (504) and returns to the step (505).
Proceed to. As a result, the loaded recording medium 2 is a CD-R
It is confirmed that the disc is an OM disc. Processing such as data reading subsequent to this confirmation is continued by the CD-ROM reading circuit 3, and information is continuously read from the recording medium 2.

On the other hand, the recording medium 2 is a CD-ROM
Even when a CD-RW disk is loaded instead of a disk, first, the CD-ROM reading circuit 3 corresponding to the CD-ROM disk as the priority medium is selected, and it is determined in the determination step (502) whether the data has been read correctly. Is determined. However, since a CD-RW disk is actually used instead of a CD-ROM disk,
The CD-ROM reading circuit 3 cannot read data correctly, and the control C
The PU 7 recognizes that the reproduction method is incompatible. As a result, the process does not proceed to step (505), but proceeds to step (50).
3), and the control CP
U7 sets the CD-ROM reading circuit 3 to non-selection and sets the CD-R
The W reading circuit 4 is selected. For this reason, the laser beam irradiated and returned by the recording medium 2 (in this case, a CD-RW disc) is read by the CD-RW reading circuit 4. Further, in the subsequent step (504), the control CPU 7
Determines whether the data processing circuit 5 has correctly processed the data. In this case, since the reproduction method of the CD-RW reading circuit 4 is suitable for a CD-RW disc, the process can proceed to step (505) upon receiving a correct data reading result. However, if it is determined that the disc cannot be read, the process proceeds to step (506), and an appropriate countermeasure is taken.

[0006]

The above-mentioned conventional optical disk reproducing apparatus 1 is compatible with both a CD-ROM disk and a CD-RW disk, but the priority is adopted when the recording medium 2 is mounted. Since the reproduction method is set corresponding to the CD-ROM disk as the priority medium, for example, when the CD-RW disk is frequently used, the control CPU 7 instructs the reproduction by the CD-RW reading circuit 4. Until the control CPU 7 correctly recognizes the normal reproduction method,
And reproduction data could not be obtained from the computer, resulting in a remarkably poor operability. That is, the step (50) shown in FIG.
1) and (502), the CD-RO must be read at the beginning of reproduction.
Since the data reading is started assuming the M disk, in order to correctly recognize the CD-RW disk, it is necessary to go through steps (503) and (504). Had the problem of requiring

Accordingly, when a CD-RW disc is frequently used in the optical disc reproducing apparatus 1 in which a CD-ROM disc is set as a priority medium, useless steps (501) and (502) are repeated every time the disc is replaced. There was a problem that extremely reduced operability. Indeed, if the medium type of the disc to be played is unknown to the user, the above medium type determination program is effective, but if the user knows the type of the used medium,
The automatic discrimination operation has a disadvantage that it has an adverse effect of delaying the start of reproduction. Also, as a common feature of this type of program, for example, in the determination step (502) or the determination step (504), whether the data can be read correctly through a plurality of trials in consideration of a safety margin against accidental reading failure or the like. It is common to make a judgment. In fact, if such an attempt would result in a read failure due to an accidental event,
It is very effective, but in the case of reproducing a recording medium that is known to have a different reproduction method, there is a problem that it is not only useless but also deteriorates usability. .

[0008] Furthermore, a CD is provided by an electric switching means.
-When the configuration for switching between the ROM reading circuit 3 and the CD-RW reading circuit 4 is adopted, the switching of the reading means is completed in a relatively short time, but mechanical changes such as a plurality of media prepared for each medium are performed. In the case of switching such that the optical pickup that is compatible with the loaded medium is transported from the standby position to the operating position and the optical pickup is replaced with an appropriate one, it takes time in seconds to switch the reading unit. However, there is a problem that the operability is further deteriorated.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to enable a plurality of recording media having different reproduction methods to be reproduced according to a priority reproduction method arbitrarily designated from the outside.

[0010]

In order to achieve the above object, the present invention relates to a medium reproducing apparatus having a plurality of reproducing systems corresponding to a plurality of types of recording media having different reproducing systems, wherein a recording medium is mounted. Immediately thereafter, a reproducing unit that reproduces the recording medium in accordance with a priority reproduction method in which a priority application among the plurality of reproduction methods is specified in advance, and a type of the attached recording medium is determined from a reproduction output of the reproduction unit. A medium type discriminating means, a reproducing method switching request means for outputting a reproducing method switching request when the medium type determined by the medium type determining means is different from the medium type corresponding to the priority reproducing method, And a switch for setting the priority reproduction method, and a memory for storing the priority reproduction method set by the switch and designating the reproduction means. It is intended to.

[0011] Further, the invention is characterized in that a display is provided for displaying a medium type corresponding to the priority reproduction system stored in the memory.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic block diagram showing an embodiment of an optical disk reproducing apparatus to which the medium reproducing apparatus of the present invention is applied. FIGS. 2 and 3 each explain a medium type identification operation by the optical disk reproducing apparatus shown in FIG. And a flowchart for explaining a priority reproduction method change operation.

An optical disk reproducing apparatus 11 shown in FIG. 1 has an externally operated switch 12 for designating and setting a medium type corresponding to a priority reproduction method, and a medium type corresponding to the priority reproduction method set by the switch 12. And a display 14 for displaying a medium type corresponding to the priority reproduction method stored in the memory 13 and connected to the control CPU 7. In this embodiment, the CD-ROM reading circuit 3 and the CD-ROM
The RW reading circuit 4 and the display processing circuit 5 constitute a reproducing means for reproducing the recording medium immediately after the recording medium 2 is mounted in accordance with a pre-specified priority reproducing method, and the control CPU 7 controls the reproduction output of the reproducing means. A medium type discriminating means for discriminating the type of the recording medium mounted from the apparatus; and a reading means for switching the reproducing method when the medium type determined by the medium type discriminating means is different from the medium type corresponding to the priority reproducing method. The reproducing system switching request means to be supplied to the switching circuit 6 is constituted.

First, when the power of the optical disk reproducing apparatus 11 is turned on, the control CPU 7 initializes each circuit in the apparatus. At this initialization stage, the memory 13 stores a priority medium predetermined in the control program of the control CPU 7, here, a CD-ROM disk, as a recording medium corresponding to the priority reproduction method, that is, a priority medium. I have. However, when a CD-RW disc is frequently used as the recording medium 2, the user operates the switch 12 and
A CD-RW disc can be set as a priority medium. In this case, the control CPU 7 recognizes that the switch 12 has been operated by interrupt processing or polling processing. Specifically, step (30) shown in FIG.
In 1), the control CPU 7 reads the setting contents of the switch 12, and in the following step (302), receives the setting contents that “the priority medium is a CD-RW disc”, and proceeds to step (303) to store it in the memory 13. “The priority medium is a CD-RW disc” is stored, and the process proceeds to step (305). The priority medium is CD-ROM
The disk can be reset, and in that case, the process proceeds from the determination step (302) to the step (305) via the step (304).

Further, since the medium type of the priority medium corresponding to the priority reproduction method stored in the memory 13 is displayed on the display 14, the user can always check the display on the display 14 for the latest priority medium. The settings can be confirmed visually. Therefore, it is possible to easily change the setting of the priority medium without error.

Here, it is assumed that the user has mounted the CD-RW disc as the recording medium 2 on the optical disc reproducing apparatus 11. In this case, the control CPU 7 knows that the recording medium 2 has been mounted by interrupt processing or the like, and proceeds with the processing according to the flowchart shown in FIG. First, step (20)
In 1), the priority medium is read from the memory 13. Here, since the priority medium has been changed to the CD-RW disk by the above-described processing, in the subsequent determination step (202), the priority medium is recognized as the CD-RW disk. Therefore, the control CPU 7 executes the determination step (20)
In step (211) subsequent to 2), an instruction is given to the reading means switching circuit 6, the CD-RW reading circuit 4 is selected, and the CD-RW reading circuit 4 is selected.
-The ROM reading circuit 3 is not selected. The reflected light that irradiates the recording medium 2 (in this case, a CD-RW disc) and returns is read by the CD-RW reading circuit 4 and processed by the data processing circuit 5.

In step (212), the control CPU 7 determines whether the data processing circuit 5 has correctly read data. In this case, the CD-RW reading circuit 4
Is normally performed, the control CPU 7 proceeds to step (225) upon receiving the result of the determination in step (212), and ends the disk determination. Therefore, the subsequent processing such as data reading is continuously performed by the CD-RW reading circuit 4. Note that the operation up to this point is such that the user uses CD-
Although the case where the RW is specified has been described as an example, when the CD-ROM is specified as the priority medium and the CD-ROM disk is used, the step (20) is performed in substantially the same manner.
1), (202), (221), (222), (22)
Data reading is performed through the process of 5).

As described above, the optical disk reproducing device 11
According to the above, the switch 12 is operated to set the priority medium,
Since the contents are stored in the readable and writable memory 13, the setting of the priority medium is not fixed, and the user can arbitrarily change the setting according to the frequency of use of the recording medium 2. Redundancy of repeating unnecessary processing steps every time replacement is performed can be eliminated, and operability can be improved satisfactorily. In particular, operability can be greatly improved in a model in which reading is performed a plurality of times in consideration of a safety margin against an accidental reading failure or the like.

It should be noted that no problem occurs when a medium different from the designated priority medium is loaded in the optical disk reproducing apparatus 11. For example, when a CD-ROM disk is loaded while a CD-RW disk is set as a priority medium, the processing is performed in the order of steps (201), (202), and (211) shown in FIG. Proceeds to the discrimination step (212).
Since the W-reading circuit 4 knows that the CD-ROM disk cannot be reproduced, the process goes through step (213) after several trials.
Proceed to. In step (213), the control CPU 7
Is the CD-ROM reading circuit 3 for the reading means switching circuit 6.
CD-ROM reading circuit 3 for instructing to select
Replaces the previous CD-RW reading circuit 4 with a CD-RW.
Information is read from the ROM disk. As a result, normal reading is performed, and the process proceeds to step (225). However, if the disc is unreadable,
The process moves to step (215). Conversely, when the CD-RW disc is inserted while the CD-ROM disc is designated as the priority medium, steps (223) and (22) following the determination step (222) are performed.
After step 4), step (225) or step (2)
The process proceeds to 15), but the processing content does not substantially change.

In the above embodiment, the case where the medium reproducing apparatus of the present invention is applied to the optical disk reproducing apparatus 11 is taken as an example. However, the present invention is applied to an optical disk recording / reproducing apparatus having the optical disk reproducing apparatus 11 having a recording function. Can be applied. In addition, the medium reproducing apparatus of the present invention can be applied to an apparatus in which switching of a reproducing unit including a reading circuit involves a mechanical change. By specifying, eliminating the waste time associated with the mechanical change of the playback means after the medium is loaded,
The operability can be remarkably improved. Even if the priority playback method is switched immediately before the medium is mounted, the playback means is mechanically changed in parallel with the medium mounting operation. Is started, and the feeling of frustration felt before the start of reproduction can be reduced. In addition, the present invention relates to CD-
The present invention can also be applied to a medium reproducing apparatus that reproduces three or more optical disks having different reproduction methods such as a ROM disk, a CD-RW disk, and a laser disk. Furthermore,
The present invention relates to a recording medium such as a CD-ROM disc and a CD.
-Not limited to a device for reproducing an optical disk such as a RW disk, but may also include another device for reproducing a plurality of recording media such as a magnetic disk and a record disk.

[0021]

As described above, according to the present invention,
A switch for setting a priority reproduction method in which priority application is specified in advance among a plurality of reproduction methods, and a memory for storing the priority reproduction method set by the switch and specifying the reproduction means. Therefore, the designation of the priority medium, which is a medium corresponding to the priority reproduction method, is not fixed, and the user can arbitrarily change according to the frequency of use of the recording medium, etc., so that every time the recording medium is replaced, unnecessary processing is performed. The operability can be improved by eliminating the redundancy that repeats the steps, and the operability can be improved especially for models that perform multiple reading trials in consideration of the safety margin against accidental reading failure. Even in the case of a device in which the switching of the reproducing means involves a mechanical change, it is possible to greatly improve the medium by specifying the optimum priority reproducing method in consideration of the frequency of use of the medium. Eliminating the dead time associated with mechanical modification of reproducing means after wear, can play a remarkably improved operability, excellent effects such as enables very efficient regeneration process.

Further, since a display for displaying a medium type corresponding to the priority reproduction system stored in the memory is provided,
By looking at the display, the user can easily check the priority playback system by visually checking the latest priority medium settings, which makes it possible to easily change the settings of the priority playback system without error. It has effects such as certain effects.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing an embodiment of an optical disk reproducing apparatus to which a medium reproducing apparatus of the present invention is applied.

FIG. 2 is a flowchart for explaining a medium type identification operation by the optical disc reproducing apparatus shown in FIG. 1;

FIG. 3 is a flowchart for explaining a priority reproduction mode changing operation by the optical disc reproducing apparatus shown in FIG. 1;

FIG. 4 is a schematic block diagram showing an example of a conventional optical disc reproducing apparatus.

FIG. 5 is a flowchart for explaining a medium type discriminating operation of a conventional optical disc reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 2 recording medium 3 CD-ROM reading circuit 4 CD-RW reading circuit 5 data processing circuit 6 reading means switching circuit 7 control CPU 12 switch 13 memory 14 display

Claims (2)

[Claims] In a medium reproducing apparatus provided with a plurality of reproduction methods corresponding to a plurality of types of recording media having different reproduction methods, priority application of the plurality of reproduction methods is determined in advance immediately after a recording medium is mounted. Playback means for playing back the recording medium in accordance with the designated priority playback method; medium type determination means for determining the type of the mounted recording medium from the playback output of the playback means; and medium type determination means. When the medium type is different from the medium type corresponding to the priority reproduction method, a reproduction method switching request unit that outputs a reproduction method change request, a switch that is operated from the outside and sets the priority reproduction method, A medium reproducing apparatus, comprising: a memory for storing a set priority reproduction method and designating the reproduction means. 2. The medium reproducing apparatus according to claim 1, further comprising a display for displaying a medium type corresponding to the priority reproduction method stored in the memory.