JP3149304B2 - Medium recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium recording / reproducing apparatus for reproducing or recording a recording medium carrying information.

[0002]

2. Description of the Related Art As a recording medium on which information is recorded, a compact disk (hereinafter, simply referred to as a CD) is widely used, but the CD is read-only and cannot be rewritten.

Therefore, in recent years, a magneto-optical recording type mini-disc (hereinafter simply referred to as MD) has been proposed as a recording medium in which an information recording disc is housed in a protective cartridge. The MD is capable of not only reproducing recorded information but also recording new information or rewriting already recorded information for recording.

Now, the MD will be described with reference to FIG. FIG. 5 is a plan view showing the configuration of a general MD.

In FIG. 5, MD denotes a disk main body 51 which is an information recording medium which is an optical disk or a magneto-optical disk having a diameter of about 6 cm, and a protective cartridge case (hereinafter simply referred to as a case) for protecting the disk main body 51. ) 52, an access hole 53 formed in the case 52 for accessing the disk main body 51, and a slide shutter 54 for opening and closing the access hole 53.
And an ID hole 55 for identifying a disk type which is a medium type to be described later.

[0006] The disc types include a read-only premastered (PRE-M) type in which fixed information is recorded in advance, and a writable recordable (RECORDABLE) type.

The pre-mastered type is a high-reflectance disk, and its slide shutter 54 is
2 is provided only on one side, and a light beam from an optical pickup of a player section described later can be applied to the disk surface of the disk main body 51. Only the hole section 55b is provided as the ID hole 55. I have.

The recordable type is a low-reflectance disk, in which slide shutters 54 are provided on both sides of a case 52, and when recording on the disk body 51, the disk on the side opposite to the irradiation surface to which a light beam is irradiated. The magnetic head of the player section that applies a magnetic field to the surface is configured to face the same. The ID hole 55 is provided with two hole sections 55a and 55b. In the case of the recordable type disc, the hole 55b of the ID hole 55 can be opened and closed by a recording prevention hook (not shown), and cannot be recorded when the hole 55b is open. And the corresponding hole 55
When b is in the closed state, recording is enabled.

As an MD device for recording or reproducing such an MD (hereinafter, referred to as a disk), control contents for each disk type, for example, servo gain setting and beam output setting used for focus control and rotation speed control are provided. Therefore, it is necessary to set control contents corresponding to each disk type (recordable type or pre-mastered type).

Therefore, in order to determine the disk type of the disk mounted on the MD device, an ID hole 55 is provided on the disk as described above, and the ID hole 55 is provided.
Is provided in the MD device.

Therefore, according to the MD device, the ID
The disc type is discriminated by detecting the ID hole 55 of the disc being mounted by the hole detection mechanism, and the control content corresponding to the disc type thus determined is set. The normal reproduction process can be executed without any trouble.

[0012]

However, according to the above-mentioned conventional medium recording / reproducing apparatus, the ID hole detecting mechanism erroneously detects the ID hole 55 of the disk for some reason and the disk of the disk being mounted is not detected. If the type is erroneously determined, the beam output and the servo gain are set to the control contents corresponding to the disk type that has been erroneously determined. In such a case, there is a problem that reproduction becomes impossible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to determine the type of a disc mounted on the disc without fail and to execute a normal recording process without any trouble. A playback device is provided.

[0014]

According to a first aspect of the present invention, there is provided an information processing apparatus, comprising: a medium on which record information including identification information is recorded; and a medium for determining the type of the medium. What is claimed is: 1. A medium recording / reproducing apparatus for recording or reproducing a recording medium having a cartridge to be housed therein, comprising: an information reading means for reading recording information of the medium based on set control contents; and a medium type based on a shape of the cartridge. First type detecting means for detecting a medium type, second type detecting means for detecting a medium type from the identification information of the medium read by the reading means, the first type detecting means and the second type detecting means If the respective medium types detected by the second type detection means are different, the control means sets control contents corresponding to the medium type detected by the second type detection means. To.

According to a second aspect of the present invention, in the first aspect, the medium type is two types, and the control means determines the type of the medium detected by the first type detection means. If the corresponding control content is set and the information reading means cannot read the recording information of the medium, the information reading means corresponds to a medium type different from the medium type detected by the first type detecting means. It is characterized in that control contents are set.

According to a third aspect of the present invention, in the first or second aspect, when the first type detection unit cannot detect the medium type, the control unit determines whether or not the first type detection unit detects the medium type. It is characterized in that control contents corresponding to a predetermined medium type are set.

According to the fourth aspect of the present invention, there is provided a recording medium including a medium on which a recording medium including the identification information is recorded, and a cartridge for accommodating the medium in a shape for discriminating between two types of media. A medium recording and reproducing apparatus for recording or reproducing, information reading means for reading the recording information of the medium based on the set control content, type detection means for detecting the medium type based on the shape of the cartridge, If the control content corresponding to the medium type detected by the type detection unit is set and the information reading unit cannot read the recording information of the medium, the medium type detected by the type detection unit And control means for setting control contents corresponding to a different medium type.

According to a fifth aspect of the present invention, there is provided a recording medium having a medium on which recording information including identification information is recorded, and a cartridge for accommodating the medium in a shape for determining the type of the medium. A medium recording / reproducing apparatus for recording or reproducing, information reading means for reading recording information of the medium based on set control contents, and type detecting means for detecting a medium type based on a shape of the cartridge,
A control unit for setting control contents corresponding to a predetermined medium type among the medium types when the medium type cannot be detected by the type detection unit.

[0019]

According to the first aspect of the present invention, when the medium types detected by the first type detecting means and the second type detecting means are different, the second type Since the control content corresponding to the medium type detected by the detecting means is set with priority, it is possible to reliably determine the medium type of the recording medium and execute the normal reproduction process without any trouble. .

According to a second aspect of the present invention, in the first aspect, there are two types of media, and control contents corresponding to the media type detected by the first type detecting means are set. If the information reading means cannot read the recording information of the medium, control contents corresponding to a medium type different from the medium type detected by the first type detecting means are set. Therefore, even if the first type detection unit erroneously detects the medium type, it is possible to reliably determine the medium type of the recording medium and execute the normal reproduction process without any trouble.

According to a third aspect of the present invention, in the first or second aspect, when the first type detecting means cannot detect the medium type, the medium type is changed to a predetermined medium type in the medium type. Since the corresponding control content is set, even if the first type detecting means cannot detect the type of the recording medium for some reason, the discrimination of the medium type of the recording medium can be reliably performed, and the normal Can be executed.

According to the fourth aspect of the present invention, the information reading is performed by setting the control contents corresponding to the medium type detected by the first type detecting means when the medium type is two types. If the means cannot read the recording information of the medium, control contents corresponding to a medium type different from the medium type detected by the first type detecting means are set, Even if the first type detection unit erroneously detects the medium type, it is possible to reliably determine the medium type of the recording medium and execute normal reproduction processing without any trouble.

According to the fifth aspect of the present invention, when it is impossible to detect the medium type by the first type detecting means, control contents corresponding to a predetermined medium type are set in the medium type. As a result, even if the first type detection means cannot be detected for some reason, it is possible to reliably determine the medium type of the recording medium and execute normal reproduction processing without any trouble. Can be.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a medium recording / reproducing apparatus according to the present invention. FIG. 1 is a block diagram showing a configuration of a control unit and a signal processing unit in an MD device to which the medium recording / reproducing device of the present invention is applied.

In FIG. 1, the MD device is an audio system,
The audio system includes a servo system and a control system. In the audio system, a light beam is applied to a disk main body 51 of a disk mounted on the turntable 11, and a light beam reflected by the disk main body 51 is emitted. An optical pickup 12 for reading as information recorded on the disc, an RF amplifier 13 for amplifying a high-frequency signal read by the optical pickup 12, and an ADIP (ADress In P) for decoding an address signal obtained from the RF amplifier 13
re-groove) a signal processing unit 14, a signal processing unit 15 that converts a read signal obtained from the RF amplifier 13 into audio data of a digital signal and performs predetermined signal processing, and a signal processing unit 15 that obtains the signal. A memory controller 17 for compressing audio data on a time axis and writing the compressed audio data to the memory 16 and outputting the audio data read from the memory 16 asynchronously with the writing, that is, at a low read rate.
ATRAC (Adaptive TRansform Acoustics) that extends the time axis of audio data obtained from the memory controller 17 and performs various audibility corrections on the audio data.
IC Coding) signal processing unit 18 and a D / A converter 19 for converting audio data of a digital signal obtained from the ATRAC signal processing unit 18 into an analog audio signal. The information reading means described in claim 1 corresponds to the optical pickup 12 and the RF amplifier 13.

The D / A converter 19 is connected to a speaker 21 for outputting the analog audio signal amplified by the audio amplifier 20 via an audio amplifier 20 for amplifying the analog audio signal.

In the servo system, a spindle motor 22 for rotating a disk mounted on the turntable 11 and a frame synchronization signal, tracking error signal, focus error signal, etc. obtained by the RF amplifier 13 are provided. In response to other signals
A servo processing unit 23 for generating a drive control signal, and an optical pickup 12 based on a control signal from the servo processing unit 23.
Light beam irradiation means, tracking actuator,
It has a driver 24 for generating a drive signal for driving the focus actuator and the sled motor, and a driver 25 for generating a rotation speed control signal for controlling the rotation speed of the spindle motor 22 by a control signal from the servo processing unit 23. ing.

In the control system, an ID hole detecting mechanism 26 as first type detecting means for detecting the ID hole 55 of the disk mounted on the turntable 11 and an operation unit (not shown) are provided. And a disk loading mechanism 28 having a loading motor (not shown) for mounting a disk on the turntable 11, a sensor for detecting the mounted state of the mounted disk, and the like. A CPU 29 which is a control means for controlling the MD apparatus as a whole and communicating with a center unit (not shown) having a radio tuner, a tape deck function, a volume adjusting function, and the like, and display data output from the CPU 29. A display driver 31 for driving the display 30 It is. The second aspect of the present invention
The type detection means and the control means correspond to the CPU 29.

In these configurations, when a disc is mounted on the turntable 11 or when a reproduction command is input through the key input interface 27 or the like, the CPU 29 causes the CPU 29 via the ID hole detection mechanism 26 to perform the operation. The ID hole 55 of the disc is detected, and the disc type of the disc is recognized. still,
The ID hole detection mechanism 26 identifies the disc type by detecting the hole portion 55a of the ID hole 55. If the hole portion 55a is not detected, the pre-mastered type is used. If the portion 55a is detected, it is determined as a recordable type.

The gist of the present invention is a disc type discriminating process for surely discriminating the disc type of the disc in order to execute a normal reproducing process without any trouble to the loaded disc. The discrimination is performed based on the ID hole 55 of the disc and the TOC information that is the disc-specific identification information recorded on the disc. It should be noted that the TOC information includes a disc type in addition to title information and performance time of audio data recorded on the disc.

A memory (not shown) is provided inside the CPU 29 to store control contents for a pre-mastered type and control contents for a recordable type.

The setting change in the control content of the disc type is performed by the CPU 29 by the RF amplifier 13.
The RF amplifier 13 responds to the setting change command of the control content by using the optical pickup 12.
The optical beam output is switched to set the servo gain of the operational amplifier in each servo loop to an appropriate state for each disk type.

Next, the operation of the MD device will be described with reference to FIGS.
It will be described based on. FIG. 2 is a flowchart showing the processing operation of the CPU 29 in the disk type determination processing in the first embodiment.

When a playback command is input from the operation unit (not shown) to the currently loaded disk via the key input interface 27, the disk type determination process shown in FIG. 2 is executed.

In FIG. 2, the CPU 29 sends the ID hole 5 of the disc being mounted to the ID hole detecting mechanism 26.
5 is started (step S11).
It is determined whether or not the detection of the ID hole 55 has been completed (step S12).

If the detection of the ID hole 55 is completed, the disc type is determined based on the detection result of the ID hole detection mechanism 26, that is, the hole portion 55a
Is detected, the recordable type is determined. If the hole portion 55a is not detected, the disc is determined to be the premastered type, and the control content corresponding to the determined disc type is set (step S13). 12 is executed (step S14).
The detection operation of the TOC information is started by the reading operation (step S15), and it is determined whether the TOC information is detected (step S16). When the TOC information is not detected, it may be determined that an abnormality has occurred and the process may be terminated.

If the TOC information is detected,
It is determined whether or not the disc type determined based on the detection result of the TOC information is the same as the disc type of the control content set in step S13 (step S17). In step S17, the comparison target is a disk type, but the comparison target may be control contents corresponding to the disk type.

If the disc type is the same in step S17, a normal reproducing operation is executed (step S17).
18), the disc type discrimination processing ends.

If the disc types are not the same in step S17, the control content set in step S13 is changed to the disc type determined based on the detection result of the TOC information detected in step S15. The corresponding control content is reset (step S19), and the process proceeds to step S18.

In the case of the MD, if the pre-mastered disc is to be reproduced under the control contents of the recordable disc, not only the music information but also the TOC information cannot be read. If you try to play under the control of,
Although reproduction of music information is unstable, TOC information can sometimes be read. The case where a negative determination is made in step S17 means that, for example, the ID hole detection mechanism 26
This is the case where the latter control content is taken due to erroneous detection of.

According to the disc type discrimination processing of the first embodiment, in addition to the detection of the ID hole, the TO
C information is detected, the respective disc types are discriminated based on the detection results of the ID hole 55 and the TOC information, and the discriminated disc types are compared. Since the disc type based on the selected disc type is preferentially selected, and the control content corresponding to the selected disc type is set, the reproduction of the recordable disc is performed at least by erroneous detection of the ID hole 55. If it is attempted, the reproduction process for the disc can be executed without any trouble.

In the disc type discriminating process of the first embodiment, even if the reproduction of the premastered disc is to be performed under the control of the recordable disc due to the erroneous detection of the ID hole 55, even the detection of the TOC information is not performed. It is possible that they cannot.

In order to overcome such a situation, a disc type discriminating process according to the second embodiment described below can be considered. FIG. 3 is a flowchart showing the processing operation of the CPU 29 in the disk type determination processing of the second embodiment. Since the processing operations in steps S11 to S16 are the same as those in the flowchart of the first embodiment shown in FIG. 2, the same reference numerals are given and the description of the operations is omitted.

If no TOC information is detected in step S16 in FIG. 3, it is determined whether the number of times of the TOC information detection operation has reached a predetermined number or more (step S16).
21). If the number has not reached the predetermined number or more, the process proceeds to step S15. If the number has reached the predetermined number or more, the control content corresponding to the disk type opposite to the disk type corresponding to the control content set in step S13 is used. The setting is performed (step S22), the detection operation of the TOC information is started (step S23), and it is determined whether the TOC information is detected (step S24).

If the TOC information is not detected, the display 30 indicates that the disc type of the disc cannot be determined and is abnormal (step S25), and the operation of the apparatus is stopped. Also, in step S24, TO
If the C information is detected, the disc type corresponding to the control content set in step S13 and the
Alternatively, it is determined whether or not the disc type is the same based on the detection result of the TOC information detected in step S24 (step S26). Note that also in step S24, when TOC information cannot be detected as in step S16, the detection operation may be repeated several times.

If the disc types are the same, the reproducing process is executed for the currently mounted disc (step S27), and the disc type discriminating process ends.

If the disc types are not the same in step S26, step S16 or step S24
The control content corresponding to the disc type based on the detection result of the TOC information detected in is set (step S28), and the process proceeds to step S27.

Therefore, according to the disc type discrimination processing of the second embodiment, if the TOC information cannot be detected with the control content based on the detection result of the ID hole 55,
The control content corresponding to the disc type opposite to the disc type corresponding to the control content based on the detection result of the ID hole 55 is set, the detection operation of the TOC information is performed, and based on the detection result of the TOC information, The disc type is discriminated by means of the first embodiment. In addition to the effects of the first embodiment, when the reproduction of the premastered disc is attempted by the control contents of the recordable disc due to erroneous detection of the ID hole, the discrimination is made. The reproduction process for the disc can be executed without any trouble.

According to the disk type discrimination processing of the second embodiment, the ID hole 55 cannot be detected for some reason, and the CPU 29 cannot read the detection result of the ID hole detection mechanism 26, for example. It is also conceivable that the disc type cannot be discriminated and the disc cannot be played back.

In order to overcome such a situation, a disk discriminating process according to a third embodiment described below is considered. FIG. 4 is a flowchart showing the processing operation of the CPU 29 in the disk type determination processing of the third embodiment. Note that the processing operations of steps S14 to S16 and steps S21 to S28 are the same as those of the flowchart of the second embodiment shown in FIG. 3, so the same reference numerals are given and the description of the operations is omitted.

In FIG. 4, the CPU 29 causes the ID hole detecting mechanism 26 to start the operation of detecting the ID hole 55 (step S31), and determines whether or not the ID hole 55 has been successfully detected (step S32). ). If the ID hole 55 is successfully detected, the disc type is determined based on the detection result of the detected ID hole 55. That is, if the hole 55a is detected, a recordable type is determined. , The hole 5
If 5a has not been detected, it is determined that the disk type is a pre-mastered type, control contents corresponding to the determined disk type are set (step S33), and the process proceeds to step S14.

In step S32, the ID hole 55
If the detection has not been performed successfully, it is determined whether the number of times of the ID hole detection operation has reached a predetermined number or more (step S34). If the number of times has not reached the predetermined number or more, the process proceeds to step S31. If the number of times has reached the predetermined number or more in step S34, the control content of the preset disk type, for example, the control content of the pre-mastered type is set. (Step S35), and Step S
Go to 14.

When the control content of the pre-mastered type is set in step S35, the disc type set, that is, the pre-mastered type and the disc type based on the TOC information detected in step S16 are determined. The comparison is performed in step S26.

Therefore, according to the disk type discriminating process of the third embodiment, if the ID hole 55 cannot be detected, the control content is set to, for example, a pre-mastered type. Even if detection is impossible, at least TOC information can be read,
The control content can be set based on the reading result.

In the above embodiment, the recording medium is M
Although the description has been made by applying the invention to D, the medium may not be the MD, and may include a medium on which identification information in which a disk type is recorded and a cartridge having a shape for identifying the disk type and containing the medium. Needless to say, the present invention can be applied to any recording medium having such a recording medium.

[0056]

According to the first aspect of the present invention, if the medium types detected by the first type detecting means and the second type detecting means are different, Since the control content corresponding to the medium type detected by the second type detection means is set with priority, the discrimination with respect to the medium type of the recording medium is ensured, and normal reproduction processing can be performed without any trouble. Can be performed.

According to a second aspect of the present invention, in the first aspect, there are two types of media, and control contents corresponding to the media type detected by the first type detecting means are set. If the information reading means cannot read the recording information of the medium, control contents corresponding to a medium type different from the medium type detected by the first type detecting means are set. Therefore, even if the first type detection unit erroneously detects the medium type, it is possible to reliably determine the medium type of the recording medium and execute the normal reproduction process without any trouble.

According to the third aspect of the present invention, in the first or second aspect, if the first type detecting means cannot detect the medium type, the medium type is changed to a predetermined medium type in the medium type. Since the corresponding control content is set, even if the first type detecting means cannot detect the type of the recording medium for some reason, the discrimination of the medium type of the recording medium can be reliably performed, and the normal Can be executed.

According to the fourth aspect of the present invention, the information reading is performed by setting the control contents corresponding to the medium type detected by the first type detecting means when there are two types of medium. If the means cannot read the recording information of the medium, control contents corresponding to a medium type different from the medium type detected by the first type detecting means are set, Even if the first type detection unit erroneously detects the medium type, it is possible to reliably determine the medium type of the recording medium and execute normal reproduction processing without any trouble.

According to the fifth aspect of the present invention, when it is impossible to detect the medium type by the first type detecting means, control contents corresponding to a predetermined medium type are set in the medium type. As a result, even if the first type detection means cannot be detected for some reason, it is possible to reliably determine the medium type of the recording medium and execute normal reproduction processing without any trouble. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a control unit and a signal processing unit of an MD device to which a medium recording / reproducing device of the present invention is applied.

FIG. 2 is a flowchart illustrating a processing operation of a CPU in a disk type determination process according to the first embodiment.

FIG. 3 is a flowchart illustrating a processing operation of a CPU in a disk type determination process according to a second embodiment.

FIG. 4 is a flowchart illustrating a processing operation of a CPU in a disk type determination process according to a third embodiment.

FIG. 5 is a plan view showing a configuration of a general MD.

[Explanation of symbols]

Reference Signs List 12 optical pickup (information reading means) 13 RF amplifier (information reading means) 26 ID hole detection mechanism (first type detection means, type detection means) 29 CPU (second type detection means, control means) 51 Disk body ( Medium) 52 Cartridge case (cartridge) 55 ID hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 19/12 501 G11B 7/00

Claims (5)

(57) [Claims] 1. A medium recording / reproducing apparatus for recording or reproducing a recording medium having a medium on which recording information including identification information is recorded, and a cartridge for accommodating the medium in a shape for determining the type of the medium. Information reading means for reading recording information of the medium based on the set control contents; first type detecting means for detecting a medium type based on the shape of the cartridge; and a medium read by the reading means. A second type detecting means for detecting a medium type from the identification information of the first type, and a medium type detected by the first type detecting means and the second type detecting means, wherein the second type detecting means detects the second type. A medium recording / reproducing apparatus, comprising: control means for setting control contents corresponding to the medium type detected by the type detection means. 2. The medium type is two types, the control means sets control contents corresponding to the medium type detected by the first type detection means, and the information reading means sets the medium type. 2. The control content corresponding to a medium type different from the medium type detected by the first type detecting means is set when the recording information of the first type cannot be read. Medium recording and playback device. 3. The control means sets control contents corresponding to a predetermined medium type in the medium type when the medium type cannot be detected by the first type detection means. The medium recording / reproducing apparatus according to claim 1. 4. A medium recording / reproducing apparatus for recording / reproducing a recording medium including a medium on which a recording medium including the identification information is recorded and a cartridge accommodating the medium in a shape for discriminating the two types of media. Information reading means for reading recording information of the medium based on the set control contents; type detecting means for detecting a medium type based on the shape of the cartridge; and a medium detected by the type detecting means. If control information corresponding to the type is set and the information reading means cannot read the recording information of the medium, control corresponding to a medium type different from the medium type detected by the type detecting means is performed. A medium recording / reproducing apparatus, comprising: control means for setting contents. 5. A medium recording / reproducing apparatus for recording / reproducing a recording medium having a medium on which recording information including identification information is recorded, and a cartridge for accommodating the medium in a shape for determining the type of the medium. Information reading means for reading the recording information of the medium based on the set control contents, type detecting means for detecting the medium type based on the shape of the cartridge, and detection of the medium type by the type detecting means is not possible. A medium recording / reproducing apparatus, comprising: control means for setting, when possible, control contents corresponding to a predetermined medium type in the medium type.