JP2000222811A - Recording and reproducing apparatus for optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recording and reproducing apparatus, for an optical disk, by which important data can be protected from a careless or intentional act by a method wherein only a user who records the data can rewrite or erase the data in a recordable optical disk and to obtain a recording and reproducing apparatus, for an optical disk, which is provided with an erasure possibility or impossibility judgment means which functions even in a disk which is used so as to be taken out from a housing case. SOLUTION: A plurality of light emitting sources 53, 54 emit light. A pickup lens 50 and a pickup lens 51 are moved to the direction to their optical axis. The kind of the optical disk 1 is discriminated on the basis of an S-shaped curve pattern which is seen in a focus error signal which is output. In addition, when data is recorded in the disk 1, the write protection of the data is set, and a password is input so as to be recorded in the disk 1 together with the data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording / reproducing apparatus capable of optically recording and reproducing data, and more particularly to an optical disk recording / reproducing apparatus capable of controlling permission / prohibition of erasing / rewriting of data.

[0002]

2. Description of the Related Art In an optical disk recording / reproducing apparatus for optically recording / reproducing data, conventionally, for example, in the case of a CD-RW which is a rewritable optical disk, the recording operation is temporarily terminated without closing a session, and the data is not yet read. There is a technique called multi-session that enables data to be recorded next time in an area where no data is recorded.

[0003] In this case, on the disk on which the recording is written, it is possible for anyone to add the recording next time to an unrecorded area, and the written data is erased and a new data is written. Anyone could write and rewrite data. The fact that data written on a disk is rewritable or erasable is only stored by the person who actually wrote the record. The only way to give information about permission or disapproval to others is to write down notes on a disc or case.

As described above, it is possible to prevent data written on an optical disk that can be easily rewritten by anyone from being erased.
For this reason, the following method has been conventionally implemented. For example, in the case of a disc housed in a case such as a PD (phase-change recording rewritable optical disc), when important data is written, the "claw" of the case and the erasure prevention tab are manually recorded in the erasure prevention position. Had to switch. By doing so, it was possible to prevent the data from being rewritten or erased by mistake at the next use. Details of the above-described conventional technique of prohibiting rewriting and erasing of an optical disk will be described below with reference to FIGS.

FIG. 1 is a block diagram showing a schematic configuration of a conventional optical disk recording / reproducing apparatus. First, a recording / reproducing operation in a conventional device will be described with reference to the configuration diagram of FIG. In FIG. 1, a disk (1) set in the recording / reproducing apparatus is, for example, a DVD-RAM disk and is housed in a protective case (24).
The protection case (24) is provided with an erasure prevention tab (25) to prevent rewriting and erasure.

The recording / reproducing apparatus shown in FIG. 1 first picks up a disk (1) (hereinafter also referred to as PU) (3).
And read the signal, and input the read signal to the preamplifier (4). From the input signal, the preamplifier (4) outputs an RF signal that is a modulated high-frequency signal, a tracking error signal (hereinafter, also referred to as TE) that changes according to the tracking shift amount, and a focus error signal (hereinafter, referred to as TE) that changes according to the focus shift amount. FE). An APC circuit (14) is arranged to control the amount of light emitted from a laser light source (not shown) in the PU (3), and the APC circuit (14) and the laser light source are turned on / off.
Is controlled by the CPU (22). PU
(3) is movable along the recording surface of the disk (1) by the carriage (25).

The FE signal generated by the preamplifier (4) is input to a servo amplifier (5). The input signal is converted into a digital signal by a first A / D converter (6) inside the servo amplifier (5), and is converted to a first D / A converter via a first equalizer / amplifier (7). After being converted into an analog signal again in (8), it is input to a first driver circuit (12) for driving a focus coil. And PU
The focus coil (not shown) in (3) is driven.
Further, the TE signal generated by the preamplifier (4) is input to the servo amplifier (5). The input signal is input to a second A / D converter (9) inside the servo amplifier (5),
The second D / A via the equalizer / amplifier (10)
After being converted again into an analog signal by the converter (11), it is input to a second driver circuit (13) for driving a tracking coil. Then, a tracking coil (not shown) in the PU (3) is driven.

Further, the RF signal generated by the preamplifier (4) is inputted to a decoder (15). The input signal is converted into a digital signal by a third A / D converter (16) inside the decoder (15), and is then sent to a synchronization detection circuit (18) via a third equalizer / amplifier (17). input. Further, the output signal of the synchronization detection circuit (18) is input to a spindle error circuit (19), an error signal is generated, and the error signal is converted again into an analog signal by a third D / A converter (20). The third driver circuit (2
The spindle motor (2) is driven by 1). The output of the third equalizer / amplifier (17) is demodulated by the demodulation circuit (27) and then output to the outside of the recording / reproducing device as reproduced output data.

In FIG. 1, the position of the erasure prevention tab (25) mounted on the case (24) is set in advance by the user as either erasable or unerasable, and the erasure prevention detector (26). Detects the position set by the user, the CPU (22) reads the detection result, and the CPU (22)
The detection result is stored in the memory (23) connected to. When the erasure prohibition tab (25) is set to a position where erasure is possible, data to be recorded on the disc (1) input by the user is adjusted by the modulation circuit (28) according to the format of the disc (1). For example, DVD-RAM
, And is recorded on the disc (1) by the PU (3) via the recording circuit (29).

Next, in the optical disk recording / reproducing apparatus according to the prior art, a method of determining whether data recorded on the disk (1) can be erased or not will be described with reference to FIGS. 2, 3-1 and 3-2. This will be described in more detail. FIG. 2 is a schematic diagram showing the appearance of the case (24) for storing the disk (1) and the operation of the erasure prevention tab (25). FIGS. 3-1 and 3-2 are schematic diagrams illustrating the principle of detecting the position of the erasure prevention tab (25) by the erasure prevention detector (26).

In FIG. 2, the case (24) is provided with, for example, the erasure prevention tab (25) on the same surface as the recording surface of the disk (1) not shown. The erasure prevention tab (25) selects one of two possible positions to enable the recording / reproducing apparatus to write data to or erase data from the disk (1) (see FIG. 2 (B)). )) Or to prevent it
(FIG. 2 (A)).

In FIGS. 3A and 3B, when a case (24) containing a disk (1) is set in the apparatus, the recording / reproducing apparatus uses an erasure prevention detector (26) to prevent erasure. It detects which tab (25) is set. As shown in FIGS. 3-1 and 3-2, for example, assuming that the erasure prevention detector (26) is realized by a mechanical switch, the erasure prevention tab (25) is used.
Is in the "recordable" position, the erasure prevention detector (26) realized by the switch enters the state shown in FIG. 3A, and outputs, for example, a logical value "L". On the other hand, when the erasure prevention tab (25) is located at the "recording disabled" position (FIG. 2).
In (A)), the erasure prevention detector (26) realized by the switch enters a state as shown in FIG. 3-2, and outputs, for example, a logical value “H”. As described above, the erasure prevention detector (2)
The CPU checks the signal output in 6) and determines whether the set disk is recordable or not.

However, in the above-described conventional method for determining whether the optical disk is erasable or not, the position of the erasure prevention tab (25) attached to the case (24) for storing the optical disk (1) is changed as described above. Since the setting of recording enable / disable of the disk is changed by switching, the change can be performed not only by the user who wrote the data to the disk (1) but also by anyone else. For this reason, there has been a problem that important data cannot be protected from inadvertent or intentional attempts to destroy data.

By the way, the applicant of the present invention has previously filed Japanese Patent Application Nos. 10-63611 and 10-17770.
No. 9 proposes a device for quickly discriminating the type of an optical disk in an optical disk recording / reproducing device in which a bare optical disk taken out of a storage case is mounted and recording is read and written. The core of the proposal in the above invention is a technique for discriminating an optical disk from a pattern of an FE signal when a plurality of laser emission sources included in a pickup are simultaneously illuminated to perform focusing, and the FE signal described above. Is a technique for discriminating an optical disk from an output pattern obtained when a plurality of amplifiers are simultaneously amplified.

On the other hand, conventionally, when an optical disk is taken out of a storage case, there is no method for quickly determining whether the optical disk is read-only, write-once, rewritable, or CD, CD-RW, DVD, or the like. In particular, in the case of a rewritable optical disk, the method of using the optical disk stored in a case has been mainly used. However, in the recording / reproducing apparatus for a rewritable optical disk according to the invention of the present applicant, it is possible to read and write a recording by mounting the optical disk in the recording / reproducing apparatus in a bare state taken out of the storage case. It has become practically possible. However, if the optical disk is taken out of the case and used, the erasable / impossible determination means using the erasure prevention tab (25) attached to the storage case (24), which has already been described as the related art, does not function. Therefore, when the disc is set in the recording / reproducing apparatus with the disc being exposed, there is a problem that it is not possible to determine whether or not recording erasure of the disc is possible.

[0016]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to solve the following problems. In other words, the problem to be solved is that, on an optical disc capable of recording and reproducing data, only the user who recorded the data can rewrite or delete the data, and attempt to rewrite or delete the data. Provide an optical disk recording / reproducing device equipped with erasable / non-erasable judging means, which can protect important data from inadvertent or intentional acts, and its function also works on disks used by taking it out of the storage case It is to be.

[0017]

In order to solve the above-mentioned problems, the present invention relates to a light-emitting source for reading data in an optical disk (1) recording / reproducing apparatus capable of optically recording and reproducing data. (53) A discriminating means (2) for discriminating the type of the optical disc (1) by emitting a plurality of lights from (54).
2) and recording means (3) (28) (29) capable of recording, together with the data, a declaration of the write protection setting of the data and an authentication password when recording the data on the optical disc (1). (30) and (22); an authentication unit (32) for authenticating the authentication password recorded along with the data in which the write protection setting is declared, recorded on the optical disc (1); An optical disk capable of optically recording and reproducing data, comprising: a control unit (22) that does not rewrite or erase the data if the authentication of the authentication password by the unit (32) is unsuccessful. (1) A recording / reproducing apparatus is provided.

Further, in order to solve the above problems, the present invention provides a recording / reproducing apparatus (70) for an optical disk (1) capable of optically recording and reproducing data and a recording / reproducing apparatus for the recording / reproducing apparatus (70). In a device in which a control device (71) for controlling a reproducing operation is connected so as to be able to send and receive signals to and from each other, a plurality of light-emitting sources (53) and (54) for reading data emit light and the optical disc (1) (22) for discriminating the type of data, and a recording means () capable of recording a declaration of a write-protect setting of data and an authentication password when recording data on the optical disc (1). 76) (72) (71) (28) (29)
(22) An authentication means (71) for performing authentication of the authentication password recorded along with the data in which the write protection setting is declared, recorded on the optical disc (1), and (3); The controller (71) does not rewrite or delete the data if the authentication of the authentication password by the authentication means (71) is unsuccessful. Optical disk recording / reproducing device (70) and control device (71) for controlling the recording / reproducing operation of said recording / reproducing device (70)
Provide devices connected so that signals can be transmitted and received from each other.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an optical disk recording / reproducing apparatus according to the present invention will be described below with reference to FIGS.

First, the configuration of the apparatus shown in FIG. 4 and the schematic functions of the components will be described below. FIG. 4 is a schematic configuration diagram in the first embodiment of the device according to the present invention. In the case where the apparatus has the same functions as those of the apparatus according to the related art described with reference to FIG. 1, some of them have the same names and numbers.

In FIG. 4, the disk (1) is, for example, D
This is an optical disk such as a VD-RAM that can record and reproduce data. Unlike the device according to the related art, the disk is set in the device alone without being housed in a case.
The spindle motor (2) has a function of rotating the disk (1). Pickup (3) (hereinafter also referred to as PU)
Reads data optically from disk (1),
It has a function of writing data optically.

In FIG. 4, a signal is read from a disk (1) set in the apparatus by a PU (3), and the read signal is input to a preamplifier (4). A plurality of signals to be described later are generated. The PU (3) is movable along the recording surface of the disk (1) by the carriage (25), and an APC circuit for controlling the light emission amount of a plurality of laser light sources (not shown) in the PU (3). 1 (14), APC
Circuit 2 (33) is provided, and APC circuit 1 (14), APC
The circuit 2 (33) and ON / OFF of the laser beam are controlled by the CPU (2
Controlled by 2). The preamplifier (4) outputs a first laser light source (which is mainly used for DVD reproduction and writing) (53) described later,
A first focus error signal (FE signal-1), which is a signal that changes in accordance with the defocus of the laser light, and a second laser light source (mainly used for reproducing and writing a CD) described later (54) ) Is output, which is a signal that changes according to the defocus of the laser light, and outputs a second focus error signal (FE signal-2). Each signal is input to the servo amplifier (5).

In the servo amplifier (5), the F
The E signal-1 is supplied to the first A / D converter (6) and the first amplifier (34), and the FE signal-2 is supplied to the first A / D converter (6) and the second amplifier (34). 35). The two focus error signals are output from the first A / D converter (6).
After being converted into a digital signal by a first D / A converter (8) via a first equalizer / amplifier (7), and then converted into a digital signal by a first D / A converter (8). 1 and drives a focus coil (not shown) in the PU (3).

Further, the outputs of the first amplifier (34) and the second amplifier (35) to which the two focus error signals have been input are input to a second A / D converter (36). The CPU (22) reads out the magnitudes of the two focus error signals output from the first A / D converter (6) and the second A / D converter (36), and stores the magnitudes in the memory (2).
Store in 3). The first A / D converter (6);
The two focus error signals input to the second A / D converter (36) are time-divided under the control of the CLK (37), and the A / D conversion is performed simultaneously and in parallel. In the time-sharing method, for example, the input is switched by switch means, but the illustration is omitted.

Further, the TE signal, which is a tracking error signal generated by the preamplifier (4) and changes according to the amount of tracking deviation, is input to the servo amplifier (5), and then the third signal A is provided inside the servo amplifier (5). / D converter (9), is converted to an analog signal again by a second D / A converter (11) via a second equalizer / amplifier (10), and then used for driving a tracking coil. , And drives a tracking coil (not shown) in the PU (3).

Further, the RF signal which is a modulated high-frequency signal generated by the preamplifier (4) is input to the decoder (15). The input signal is converted into a digital signal by a fourth A / D converter (16) inside the decoder (15), and then is converted through a third equalizer / amplifier (17).
The signal is input to a synchronization detection circuit (18), and further input to a spindle error circuit (19), and an error signal that changes in accordance with the rotation unevenness of the disk (1) is generated.
After being converted to an analog signal by the / A converter (20),
A third driver circuit (2) for driving the spindle motor
1) is input to drive and control the spindle motor (2).

On the other hand, the output of the third equalizer / amplifier (17) is demodulated by a demodulation circuit (27), and the demodulated data is output to the outside of the device as read data and rewritten at the same time. It is input to the availability determination circuit (32). The rewritable / non-rewritable discriminating circuit (32) includes a data rewritable / unwritable data included in the input demodulated data.
CPU (22) extracts information relating to impossibility
Output to The CPU (22) stores the content of the input information in the memory (23). The CPU (22) includes an input unit (30) realized by input keys or the like for the user to input a password or the like, as described later, a character input from the input unit, a message to the user, or the like. , A display unit (31) implemented by a liquid crystal panel or the like is connected.

Next, the internal structure of the pickup (3) will be described in more detail with reference to FIG. FIG. 7 shows a schematic configuration of the pickup (3) in the first embodiment of the device according to the present invention.

In this embodiment, the optical systems for CD and DVD are housed in the same case (not shown).
In other words, in the pickup (3), for example, when the disc to be recorded / reproduced by the apparatus is a CD, CD-RW and DVD, the objective lens for CD (50), the objective lens for DVD (51), and the CD Laser light source (54)
(Hereinafter also referred to as LD2) and a laser light source for DVD (5
3) (hereinafter also referred to as LD1). And C
D objective lens (50) and DVD objective lens (5
1) Focus coil (52) for driving simultaneously, CD
Light receiving element (59) for DVD and light receiving element (60) for DVD,
CD mirror (58) and half mirror (57), DV
A mirror (56) for D and a half mirror (55) are provided. The optical configuration of the pickup is not different from the conventional optical disk recording / reproducing apparatus in principle.

Next, in the embodiment of the apparatus according to the present invention, the operation at the time of recording data on a disk will be described with reference to the flowchart of FIG. FIG. 5 is a flowchart showing a temporal transition of an operation when the apparatus according to the present invention records data on a disk.

When the process of recording data on the disk (1) starts, it is first checked whether the disk (1) has been set in the apparatus (STEP 1). If the disk (1) has been set, disc discrimination (details) Is described later) (STEP 2), and it is determined whether the set disc (1) is a disc capable of recording and reproducing (STEP 2).
3). When it is determined that the disc can be recorded and reproduced, the laser light sources (53) and (54) corresponding to the disc type are selected to emit light, the pickup (3) is focused on, and the recording surface of the disc (1) can be recorded. A standby is made at the head of the area (STEP 4).

If it is determined in STEP 3 that the disc cannot be recorded and reproduced, recording is not performed and only the reproducing operation is performed. YE in STEP3
In S, the process proceeds to STEP4, and upon receiving a recording command from the user (STEP5), whether data to be recorded on the disc (1) from now on is free to rewrite or erase data, that is, whether the data to be recorded is A display asking the user to select whether or not to set the write protection is displayed (STEP 6), and the user selects and inputs which one (STEP 7).

It is confirmed whether or not the user has entered the rewrite / erase setting for the recording / rewrite / erase setting (ST).
EP8), YES in STEP8, that is, when the user selects that the data is free to record, rewrite, and erase, the writing is freely set (STEP9), and STEP1 is set.
Proceed to 2. If the user sets non-free data, the apparatus displays a message prompting the user to enter a password (STEP 1).
0), the user inputs a password (STEP 1).
1). Then, recording of information as to whether or not the input data is free to be rewritten / erased, that is, write protection setting and password information, and data recording are started (ST).
EP12). When recording, the write protection setting information and the password information are recorded, for example, at the head of the data.

Next, the operation of rewriting data will be described with reference to FIG. FIG. 6 is a flowchart showing a time transition of the operation when the apparatus according to the first embodiment of the present invention rewrites or erases data already recorded on the disk.

In FIG. 6, the recording / reproducing apparatus for the disc (1) recorded by the method described with reference to FIG.
Check whether the disk (1) is set (STE
P21), if YES, discrimination to be described later is made (S21).
(Step 22) It is determined whether or not the set disk is a disk capable of recording and reproduction (STEP 23). If it is determined that the disc can be recorded and reproduced, the laser light sources (53) and (54) corresponding to the type of the disc are selected to emit light, the pickup (3) is brought into focus, and data to be rewritten is recorded. It waits at the head of the set area (STEP 24). When a rewrite or erase command is received (YES in STEP 25), the information of the write protect setting and the password information recorded in advance on the disk (1) are read and stored (STEP 25).
26).

The stored information is evaluated to determine whether the data can be freely rewritten or erased (STEP 2).
7). If the rewriting / erasing is not free (permission is required), a message prompting the user to enter a password is displayed (S
(Step 28), the user inputs a password (ST)
EP29). The input password (P2 in FIG. 6) is compared with the password (P1 in FIG. 6) recorded in advance in the disk (1) and read in STEP 26 (STEP 30). For example, a display that permits rewriting and erasing and prompts the user to input whether or not to set write protection for the data after the current rewriting is displayed (STEP 31).

If NO in STEP 30 (the passwords do not match), rewriting / erasing is not permitted and the process is terminated. If the data to be rewritten in STEP 27 contains information indicating that write protection is not set, rewriting and erasing are permitted, and the process proceeds to STEP 31. The information about the write protection setting of the data rewritten this time and the new rewritten data or erased data, which are input by the user, are written to the disk (STEP 33). Thus, the operation of rewriting data on the disk is completed.

Next, a disc discriminating method in the apparatus according to the first embodiment will be described with reference to FIG. 4 and FIGS. First, the relationship between the operation of the pickup and the output waveform of the pickup will be described with reference to FIG. 4, FIG. 7, and FIG. FIG. 8 shows a temporal change of the output waveform of the pickup at the time of disc discriminating operation in the first embodiment.

In FIG. 8, the horizontal axis of each waveform pattern is the time axis. (A) and (l) show patterns in which the pickup (3) operates in a direction perpendicular to the recording surface of the disc (1) for focusing.
(B) and (c) show the emission patterns of the laser emission source for CD and the laser emission source for LD. (D) (e)
(F) and (g) show the output of the FE signal (focus error signal) of the light receiving element for CD (59) (FE signal-2).
If the loaded disc (1) is a CD,
In the case of (a), the case of DVD-RAM and the case of CD-RW are shown, and (a) and (b) shown above
It is illustrated so as to correspond to the temporal change of (c).
(H) (i) (j) (k) are (d) (e) (f)
The output shown in (g) is shown with the amplification factor being twice.

(M), (n), (o), and (p) represent the output (FE signal-1) of the FE signal of the DVD light receiving element (60).
This shows the case where the loaded disc (1) is a CD, a single-layer DVD, a DVD-RAM, and a CD-RW, and is separately shown in FIGS. 8A, 8B, and 8C.
Are shown so as to correspond to the change with time. (L)
Is the same signal as (a), but is shown to make it easier to understand the time change of the output of the FE signal of the DVD light receiving element (60). (Q) (r) (s) (t) is (m)
(N) The outputs shown in (o) and (p) are shown with the amplification factor being doubled.

FE11 to FE28 correspond to the C described above.
D, one layer DVD, DVD-RAM, CD-RW, various discs are mounted on the drive and picked up (3)
Performs a focusing operation, the light receiving element (59)
“S” appearing in the pattern of the FE signal output by (60)
Curve curve with a unique shape
It shows the value of the toe peak.

Next, the operation of the apparatus when the FE signal pattern shown in FIG. 8 is output will be described with reference to FIG. In FIG. 7, which is a configuration diagram of the pickup (3), the focus coil (52) is lowered together with the lens 1 (50) and the lens 2 (51) (moved in a direction away from the disk (1)) by controlling the flowing current. , CD LD (5
4) and the LD for DVD (53) are caused to emit light at the same time. Next, the lens 1 (50) and the lens 2 (51) are gradually raised (approaching toward the disk (1)).

The set disk is, for example, a single-layer DVD.
Then, the S-shaped curve in the FE signal pattern output from the light receiving element 2 (CD light receiving element) (59) by the light emission of the CD LD (54) (FIG. 8, FE12 and FE2).
2) and light receiving element 1 by LD (53) for DVD
(Light receiving element for DVD) An S-shaped curve (FE16 and FE26 in FIG. 8) occurs in the FE signal pattern output by (60). In the second A / D converter (36) in FIG. 4, the above-mentioned FE12 and FE22 and FE16 and FE26 are calculated in a time-sharing manner, and their peak-to-peak values are binarized, and the data is converted to the CPU ( 22) via the memory (2
It is stored in 3). In the same manner, when the set disc is of another type, the S-curve pattern in the FE signal is time-divided and binarized by the second A / D converter (36), and the data is transferred to the CPU (22). ) Is stored in the memory (23).

When the disc set in the recording / reproducing apparatus is a CD or a CD-RW, the reflection surface on which the pits are arranged on the disc has a lens (50) (5) which is smaller than that of the DVD.
1), the S-curve of the focus error by the CD LD (54) (FIG. 8 FE11, FE14, FE21,
FE24) and the S-shaped curve of the focus error by the DVD LD (53) (FIG. 8 FE15, FE18, F
E25, FE28) occur.

Next, the procedure for discriminating the disc type using the S-shaped curve pattern in the stored FE signal will be described with reference to FIGS. FIG. 9 is a flowchart showing a procedure for determining the type of the disc using the S-curve pattern in the FE signal. In FIG. 9, first, it is confirmed whether the disc (1) is set (STEP 1).
40) If it is set, the focus coil (52) of the pickup (3) is lowered together with the lenses (50) and (51) (STEP 41).

Next, LD for CD (54) and LD for DVD
(53) is turned on, and waits for, for example, 10 msec to wait for the actuator to stabilize (STEP 42), and then gradually raises the focus coil (52) together with the lenses (50) and (51) to a height that does not hit the disk.
(STEP 43). The peak-to-peak value of the S-curve with the amplification factor of 1 by the CD LD (54) generated near the focal point existing in the rising process (FE in FIG. 9)
1) and stores it in the memory (23) (ST
EP44). Further, the peak-to-peak value (referred to as FE2 in FIG. 9) of the S-shaped curve having the amplification factor of 2 is read and stored in the memory (23) (STEP 45). At the same time, the peak-to-peak (FE3 in FIG. 9) of the S-shaped curve with the amplification factor of 1 generated by the DVD LD (53) generated at the focal point existing in the ascending process is read from the memory. (23) (STEP 46), and the peak-to-peak (FE4 in FIG. 9) of the S-shaped curve with the amplification factor of 2 is read and stored in the memory (23) (S46).
TEP47).

Next, the focus coil is lowered to near the middle point of the movable range, and the LD for CD (54) and the LD for DVD (53)
Is turned off (STEP 48). Next, the CPU (22) reads the FE1 stored in the memory (23) and compares it with a reference value, for example, 1.0 Vp-p (STEP 49).
If it is 1.0 Vp-p or more, it is determined to be a CD (STEP 50). S
When FE1 is less than 1.0 Vp-p in TEP49, the FE3 which is an S-shaped curve of the amplification factor of 1 by the DVD LD (53) stored in the memory (23) is read out, and the reference value,
For example, comparing with 1.0 Vp-p (STEP 51), FE3 is 1.0 Vp-p.
If it is -p or more, it is further discriminated as a DVD (STEP 52).

If FE3 is less than 1.0 Vp-p in STEP 51, the LD for DVD stored in the memory (23)
FE4, which is an S-shaped curve with a double amplification factor by (53), is read and compared with a reference value, for example, 0.8 Vp-p (STEP5).
3) If FE4 is 0.8 Vp-p or more, it is determined to be a DVD-RAM (STEP 54). FE4 is 0.8Vp-p in STEP53
If it is less than FE, the FE is an S-shaped curve stored in the memory (23) and having an amplification factor of 2 by the CD LD (54).
2 is read and compared with a reference value, for example, 0.5 Vp-p (STE).
P55), if FE2 is 0.5 Vp-p or more, it is determined that the disk is a CD-RW (STEP 56). FE2 is 0.5Vp-p in STEP55
If less, it is determined that there is no disk (STEP 5
7), the determination ends. The above is the detailed description of the procedure in which the recording / reproducing apparatus determines the type of the disc (1) in the apparatus according to the first embodiment of the present invention.

According to the first embodiment of the apparatus of the present invention described above, in an optical disk capable of recording and reproducing data, only the user who has recorded the data can rewrite or erase the data. Important data can be protected from inadvertent or deliberate attempts to rewrite or delete that data,
In addition, there is an effect that an optical disk recording / reproducing apparatus provided with an erasable / non-erasable determination means can be obtained, and the function also functions for a disk used by being taken out of the storage case.

Next, a second embodiment of the apparatus according to the present invention will be described with reference to FIG. The operation of the device according to the second embodiment at the time of rewriting and erasing data will be described with reference to FIG. In the second embodiment, since the contents other than those described in FIG. 10 are common to the first embodiment already described, illustration and description of common parts are omitted. FIG.
0 is a flowchart showing the operation at the time of rewriting / erasing data in the second embodiment.

First, it is assumed that a disk (1) recorded according to the procedure shown in FIG. 5 of the first embodiment is prepared. In FIG. 10, it is confirmed whether the disk (1) is set (STEP 121), and if the disk (1) is set, the disc is determined by the same method as in the first embodiment described above (STEP 122). It is determined whether the recorded disc (1) can be recorded and reproduced (STEP 123). When it is determined that the disc can be recorded and reproduced, the laser light sources (53) and (54) corresponding to the disc type are selected to emit light, the pickup (3) is focused on, and the apparatus stands by at the head of the recordable area (STEP 124). . Next, the information relating to the write protection setting and the password information, which are recorded in advance on the disk (1), are read and stored (STEP 1).
26). The stored information is identified (STEP 12).
7) If permission is required for rewriting or erasing, wait for a rewriting or erasing command (STEP 125).
When the command is input, a message prompting the user to input a password is displayed (STEP 128), and the user inputs the password (STEP 129).

The input password (P in FIG. 10)
2) and a password previously recorded on the disk (P1 in FIG. 10) (STEP 1).
30) If they match, rewriting / erasing is permitted. The user is prompted to enter whether or not to set write protection for the data written this time (STEP 131), and the user inputs write protection (STEP 13).
2). If they do not match in STEP 130, rewrite
The deletion is not permitted, and the process ends. If it is set in STEP 127 that permission is not required for recording / rewriting / erasing, rewriting / erasing is permitted, and the process proceeds to STEP 131. Finally, information on the write protection setting input by the user and new rewrite data or erase data are written (STEP 133). Thus, the data rewriting operation is completed.

According to the second embodiment described above,
In addition to the same effects as in the first embodiment, the information on the necessity of permission at the time of rewriting or erasing, that is, the write protection setting recorded in advance on the disc is read and identified in advance. Therefore, there is an effect that the processing can be performed immediately after the rewrite command is received, and the operation speed is improved.

Next, a third embodiment of the apparatus according to the present invention will be described with reference to FIGS. The basic configuration of the present embodiment is such that an optical disk recording / reproducing apparatus and a personal computer or the like for controlling a recording operation are connected via a network or the like. The first, already explained,
In the second embodiment, the CPU (22) in the recording / reproducing apparatus performs all of the discrimination as to whether or not the disc is a recordable disc and the control of the disc. The third embodiment described below is characterized in that a personal computer or the like connected to a recording / reproducing apparatus for an optical disc via a network performs the disc discrimination and control.

First, the configuration of the third embodiment will be described with reference to FIGS. FIG. 12 is a configuration diagram showing a configuration of a recording / reproducing apparatus for an optical disc in the third embodiment. FIG. 11 is a configuration diagram of the entire apparatus including the personal computers (71) and (72). In FIG. 12, a CPU inside the recording / reproducing apparatus
From (22), control data and instructions are input / output to / from an interface unit (hereinafter also referred to as I / F) (77), and output data reproduced from the disc (1) and recorded on the disc (1). Input data is I / F
It is exchanged with another personal computer or the like via (77).

In the first embodiment described above,
The rewritable / impossible determination circuit (32), input unit (30), and display unit (31) shown in FIG. 4 are not included in FIG. 12, which is the configuration of the third embodiment, and are shown in FIG. Other components shown are included in FIG.

Next, in the third embodiment, the entire configuration of the system will be described with reference to FIG. 11 which is a connection diagram of the system. In FIG. 11, the recording / reproducing device (70) has an I / O
With F (77) as a connection point, for example, the host personal computer P
C1 (71) is connected to PC1 (71) and LAN
Is connected to PC2 (72) which is another personal computer used by the user as a terminal. In FIG. 11, a display 1 (73) and a display 2 connected to PC1 (71) and PC2 (72)
(74) is, for example, a CRT monitor having a display function,
Similarly, the input device 1 (75) and the input device 2 (76) connected to the PC1 (71) and the PC2 (72) are, for example, keyboards, and have a function of allowing a user to input commands and data.

Next, data recording, rewriting and erasing operations according to the third embodiment will be described with reference to FIGS. FIG. 13 is a flowchart showing a temporal flow of a data recording operation in the third embodiment. FIG. 14 is a flowchart showing a temporal flow of a data rewriting / erasing operation in the third embodiment.

In FIG. 13, first, the recording / reproducing device (7
0) confirms whether the disk (1) is set in the apparatus (STEP 201), and if the disk (1) is set, discriminates the disk (STEP 202). The disc determination is performed in the same manner as in the first and second embodiments. By disc discrimination, it is discriminated whether the set disc (1) is a disc capable of recording and reproduction (STEP 203), and when discrimination is made as a disc capable of recording and reproduction, a laser light source (5) corresponding to the disc type is determined.
3) Select (54) to emit light, focus on the pickup (3), and wait at the head of the data recording area (STEP 204). If it is determined in STEP 203 that the disc cannot be recorded and reproduced, the operation is skipped to perform normal reproduction.

Next, the user inputs a recording command for the disc (1) using the PC 2 (72) as a user terminal, and the recording command is recorded and reproduced via the PC 1 (71) as the host personal computer. When the data arrives at the device (70) (STEP 205), a display prompting the user to select whether or not to set write protection for data to be recorded is displayed on the display 2 (74) of the PC 2 (72) used by the user. (STEP 206), the user uses the input device 2 (76) to input which one to set (STEP 207).

Next, the PC 1 (71), which is the personal computer of the host, confirms whether or not the selection of the write protection setting input by the user enables rewriting / erasing (STEP 208), and does not set the write protection. In this case, write freely (STEP 209),
Proceed to STEP212. To set the write protection, a command is issued from PC1 (71) to PC2 (72) so as to prompt the user to enter a password, and PC2 (72) displays the instructed display on display 2 ( 74) is displayed on the display (STEP 210), and the user looks at the display and inputs the password set by the user on the input device 2 (7).
6) (STEP 211).

Next, the PC 1 (71), which is the host personal computer, issues a command input by the user to start recording the information regarding the write protect setting, the password information, and the data to the disk (1).
0) to start recording (STEP 212). At the time of recording, information on the write protection setting and password information are recorded, for example, at the head of the data.

Next, the operation of rewriting / erasing data in the third embodiment will be described with reference to FIG.
It is assumed that the disk (1) recorded by the above procedure described with reference to FIG. 13 is prepared. First, the recording / reproducing device (70) checks whether the disc (1) is set in the device (STEP 221), and if the disc (1) is set, discriminates the disc (STEP 222). Disc discrimination is performed in the same procedure as described above. The recording / reproducing device (70) determines whether the set disk (1) is a disk capable of recording / reproducing (STEP 223), and if it is determined that the disk is capable of recording / reproducing, a laser light source (53) corresponding to the type of the disk. (54) is selected to emit light, the pickup (3) is focused on, and the disk (1) waits at the head of the area in which data to be rewritten is recorded (STEP 224).

The user inputs a rewriting or erasing command for the disc (1) to the PC2 (72), and the command is transmitted to the PC1 (PC1) as the host personal computer.
When reaching the recording / reproducing apparatus (70) via (71) (STEP 225), the host PC 1 (71) transmits the information related to the write protection setting and the password information recorded in advance on the disc (1). Then, the data is read from the disk (1) using the recording / reproducing device (70) and stored (STEP 226). The PC 1 (71) determines from the stored information whether or not permission is required when rewriting or erasing the record (STEP 227). If permission is required, the PC 1 (71) displays a message prompting the user to input a password. First, PC1 (71) instructs PC2 (72), PC2 (72) displays on display 2 (74) (STEP 228), and the user
The same password that was input when data was recorded in (1) is input from the input device 2 (76) (STEP 22).
9).

The host personal computer P
C1 (71) compares the currently input password (P2 in FIG. 14) with the password (P1 in FIG. 14) recorded in advance on the disk (1) (STEP 230). If the comparison results in a match, the PC1 (71) permits rewriting / erasing of data on the disk (1), and prompts the user to input a write protection setting for the data to be rewritten this time ( (STEP 231), the user enters PC2 (7
2) from the input device (76) (STEP 23)
2).

If the passwords do not match in STEP 230, rewriting / erasing of data is not permitted and the process is terminated. Disc (1) in advance in STEP227
If the write protection setting recorded in the storage device does not require permission, the process proceeds to STEP 231 where the recording / reproducing device (70) stores the information on the write protection setting input by the user and the new rewritten data or erased data on the disk (1). (STEP 233). The above is the description of the data rewriting / erasing operation.

In FIG. 4 showing the configuration of the first embodiment described above, the rewritable / non-writable circuit (32)
In the third embodiment, the discrimination of the record enable / disable information and the control of the operation of the recording / reproducing device (70) are performed by the personal computer (71) of the host connected to the recording / reproducing device via a network or the like. Has done.

According to this method, a recording / reproducing apparatus (70) which is controlled via a network and is expected to be used jointly by a plurality of users has an optical disc capable of recording and reproducing data. ,
Only the user who recorded the data can rewrite or delete the data, and important data can be protected from inadvertent or intentional attempts to rewrite or delete the data. Has an effect that an optical disk recording / reproducing apparatus provided with an erasable / non-erasable judging function that can function also on a disk taken out of the storage case and used.

In this embodiment, the recording / reproducing device (7
0) is a PC that is a host personal computer once
1 (71), and PC2 used by the user
Although an example of connection to (72) is shown, in the case of a stand-alone use, the recording / reproducing device (70) is connected to a personal computer as a host and a user terminal, and data input and judgment are performed by one personal computer. May be.
Furthermore, in the present embodiment, the case where the terminal is only PC2 (72) has been described for the sake of simplicity, but a plurality of personal computers such as PC3 and PC4 are connected to the host PC1 (71). Can perform the same processing (not shown).

[0070]

As described in detail above, the apparatus according to the present invention enables an optical disc capable of recording and reproducing data to allow only the user who has recorded the data to rewrite or erase the data. Important data can be protected from inadvertent or deliberate attempts to rewrite or erase the data, and its function also works on discs that can be taken out of the storage case. There is an effect that an optical disc recording / reproducing apparatus provided with the determination means can be obtained.

Further, with respect to a recording / reproducing apparatus (70) which is controlled via a network and is expected to be used jointly by a plurality of users, data is recorded on an optical disk capable of recording and reproducing data. Only the user in question can rewrite or delete the data, protecting important data from inadvertent or intentional attempts to rewrite or delete the data, and its function is stored in the storage case. There is an effect that an optical disk recording / reproducing apparatus provided with an erasable / non-erasable determination means, which functions even with a disk to be taken out and used, is obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an optical disk recording / reproducing apparatus according to a conventional technique.

FIG. 2 is a schematic view showing the appearance of a case for accommodating a disk and the operation of an erasure prevention tab in a conventional optical disk recording / reproducing apparatus.

FIG. 3 is a schematic diagram showing the principle of detecting the position of an erasure prevention tab by an erasure prevention detector in a conventional optical disk recording / reproducing apparatus.

FIG. 4 is a schematic configuration diagram of a device according to a first embodiment of the present invention.

FIG. 5 is a flowchart showing a temporal transition of an operation of recording data on a disc in the first embodiment of the device according to the present invention.

FIG. 6 is a flowchart showing a temporal transition of an operation when rewriting or erasing data recorded on a disc in the first embodiment of the apparatus according to the present invention.

FIG. 7 is a configuration diagram of a pickup of the device according to the present invention.

FIG. 8 is a characteristic diagram showing a temporal change of an output waveform of a pickup in a disc discriminating operation of the apparatus according to the present invention.

FIG. 9 is a flowchart of an operation of the apparatus according to the present invention for discriminating a disk using an S-curve in an FE signal.

FIG. 10 is a flowchart showing an operation at the time of rewriting / erasing data in the second embodiment of the device according to the present invention.

FIG. 11 is a connection diagram of a system according to a third embodiment of the present invention.

FIG. 12 is a configuration diagram of an optical disk recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 13 is a flowchart of an operation of recording data in the third embodiment of the present invention.

FIG. 14 is a flowchart at the time of rewriting / erasing data in the third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 disc 2 spindle motor 3 pickup 4 preamplifier 5 servo amplifier 6 first A / D converter 7 first equalizer / amplifier 8 first D / A converter 9 second A / D converter 10 second Equalizer / amplifier 11 Second D / A converter 12 First driver 13 Second driver 14 APC circuit 15 Decoder 16 Third A / D converter 17 Third equalizer / amplifier 18 Synchronization detection circuit 19 Spindle error Detection circuit 20 third D / A converter 21 third driver 22 CPU 23 memory 24 case 25 erasure prevention tab 26 erasure prevention detector 27 demodulation circuit 28 modulation circuit 29 recording circuit 30 input section 31 display section 32 rewritable Non-discrimination circuit 50 Lens for CD 51 Lens for DVD 52 Focus coil 53 LD for DVD 5 4 LD for CD 55 Half mirror for DVD 56 Mirror for DVD 57 Half mirror for CD 58 Mirror for CD 59 Light receiving element for CD 60 Light receiving element for DVD 70 Optical disk recording / reproducing device 71 Host personal computer (PC1) 72 User terminal personal Computer (PC2) 73 Display 1 74 Display 2 75 Input device 1 76 Input device 2 77 Interface unit

Claims (2)

[Claims] 1. An optical disk recording / reproducing apparatus capable of optically recording and reproducing data, wherein a plurality of light emitting sources for reading data emit light to determine the type of the optical disk; Means for recording a data write protection setting declaration and an authentication password when recording the data along with the data, and an appendix of the data where the write protection setting recorded on the optical disc is declared. Authentication means for performing authentication of the authentication password recorded as above, and control means for not rewriting / erasing the data if authentication of the authentication password by the authentication means is unsuccessful. An optical disk recording / reproducing apparatus capable of optically recording and reproducing data. 2. An apparatus in which an optical disk recording / reproducing device capable of optically recording and reproducing data and a control device for controlling a recording / reproducing operation of the recording / reproducing device are connected to each other so that signals can be transmitted and received. A discriminating means for discriminating the type of the optical disc by emitting a plurality of light emitting sources for reading data; and a data write protection declaration and an authentication password attached to the data when recording data on the optical disc. A control unit for performing authentication of the authentication password recorded along with the data in which the write protection setting is declared, which is recorded on the optical disc. Is characterized in that if the authentication of the authentication password by the authentication means is unsuccessful, the data is not rewritten / erased. An optical disk recording / reproducing device capable of optically recording and reproducing data and a control device for controlling a recording / reproducing operation of the recording / reproducing device are connected so as to be able to transmit and receive signals to and from each other.