JPH0335479A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the waste of abandoning a disk due to a defective spot in its one part only and to cope with this problem by obtaining defective spot information by inhibiting recording information in the defective spot from being reproduced and recorded based on the defective spot information. CONSTITUTION:The subject device is provided with a defective spot recognizing means (controller) 6 for recognizing a defective spot on a magneto-optical disk 1, a memory means (TOC memory) 11 for storing this defective spot information and recording means 16-18 for rerecording contents stored in the memory means 11 as additive information into a TOC (Table of Contents) area. Then, recording information in the defective spot is inhibited by the control means 6 from being reproduced and recorded based on the defective spot information. Consequently, only the defective spot as one part of the disk 1 is out of use while the other good part can effectively be used. By this method, the waste of abandoning a disk due to a defective spot in its one part only can be eliminated, and this can properly be dealt with the defective spot information obtained prior to the recording/reproducing.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a disc recording and reproducing device that is capable of recording and reproducing, for example, music information on a recordable disc having absolute address information. be.

[Conventional technology]

BACKGROUND ART Conventionally, so-called compact discs (hereinafter referred to as CDs), which are read-only discs in which music information and the like are converted into digital signals and recorded on disc-shaped recording media, have been known. Several songs are continuously recorded on the CD, and the innermost glue-in area contains a TOC (Table of CD) in which the base oil recording start position is recorded.
An information area called ``contents'' is set. When a CD is loaded into a playback device and played, first the TOC information in the TOCjil area is played back, and this information determines the number of tracks recorded on the loaded CD and the recording start time (position) of the base oil. etc., and during subsequent playback, any song can be accessed in a short time based on the TOC information.

By the way, since the above-mentioned CD is for playback only, users cannot freely record their own favorite songs, etc., and there is a desire to develop a recording/playback device that can satisfy such requirements. As an example, a recording/reproducing apparatus using a rewritable magneto-optical disk can be considered. Regarding the recording method in this case, the disc linear velocity constant (CLV) used in CDs is used.
In order to perform velocity control, absolute address information, which is formed on the disc in the form of a concave-convex pattern or group wobbling, is formatted in advance at the time of disc formation, and the recording/reproducing device uses the absolute address information to It has been proposed to perform access to the recording section and control the CLV so that data in the same signal format as a CD can be recorded. Also, regarding the TOC information, when recording of music information etc. is completed, the TOC information is rewritten by associating the absolute address position where recording started and the absolute address position where recording ended with the song number. is possible.

(Problem to be Solved by the Invention) By the way, if a magneto-optical disk is damaged during manufacturing or due to rough handling by the user, it may cause damage to the disk, such as when recording music information or the like. This may cause defects during playback. In particular, when recording continuous information such as music on a disc, a defect in just one part of the disc will not only interrupt recording from that part, but also destroy information already recorded in other areas. There is a possibility that it will go away. In a rewritable disk such as a magneto-optical disk, the above-mentioned possibility exists every time rewriting is performed.

As a countermeasure to this problem, the user can either discard the disk even if it has a defective part, or the user can detect the defective part of the disk and write on paper etc. where the defective part is. The reality is that the only option is to record the defective area and be careful not to use the defective area when recording.

Therefore, there is a need to take some measures on the device to improve the functionality of the disk recording and reproducing device in response to such problems.

[Means to solve the problem]

In order to solve the above-mentioned problems, a disc recording/reproducing apparatus according to the present invention has absolute address information, and also includes a program area for recording recorded information and a TOCSJI area for recording additional information of the recorded information. A disk recording and reproducing apparatus using a rewritable disk having a recording area, comprising: a defective location acquisition means for determining a defective location on the disk; a memory means for storing defective location information from the defective location acquisition means; The apparatus further comprises a recording means for re-recording the content stored in the memory means in the TOC area as additional information, and a control means for prohibiting reproduction and recording of recorded information regarding the defective location based on the defective location information. It is characterized by

[For production]

According to the above configuration, in a disk that has some defective parts, it is possible to eliminate the use of only the part of the defective part and effectively use other good parts. Furthermore, it is possible to eliminate the waste of discarding a disk just because there is a defective part in the negative part.

In addition, since the defective location information is recorded in the TOC area of the disc, there is no need for the user to record the location of the defective location on paper, etc. Prior to recording/reproducing information, information on defective locations can be obtained and appropriate countermeasures can be taken.

Note that absolute address information corresponding to the defective location may be used as the defective location information, and by using this absolute address information, it is also possible to add various functions.

For example, if the above absolute address information is displayed on the device, the user can recognize the defective location (defective area). In addition, if a defective area is treated as a used area on a display having a bar-shaped lightable area and bright and dark areas are formed on the display, the user can see the recordable area at a glance. can be recognized.

Further, regarding the knowledge of the defective location, it is possible to accept the defective location information specified by the user as is, or of course, it is also possible for the device itself to determine the defective location and then learn it.

As an example of determination by the device itself, it is determined whether the absolute address information read during continuous recording or playback changes in the normal order, and if it is not in the normal order, track skipping etc. has occurred. There are methods such as determining that the corresponding absolute address is a defective location.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In this embodiment, a magneto-optical disk is used as the rewritable disk, and the so-called CD
Recording and playback of music information, etc. is performed using a data format standardized in .

In the disk recording/reproducing apparatus according to the present invention, as shown in FIG. 2, a spiral track 21 and absolute address information 22 . Recorded in advance.

The recording area is divided into an outer area and an inner area, the outer area forming a program area 24 for recording and reproducing programs such as music information (recorded information) by the user, and the inner area forming at least one area. The song number for each piece of music information, etc., and its recording start and end positions, as well as,
A T in which the defective start position, defective end position (additional information), etc. are recorded in correspondence with the above absolute address information 22...
It forms OCml area 23. The same format as the CD is used as the data format recorded in the TOCTil area 23 and program area 24. That is,
As shown in Figure 3, for each data field d, in which 8 bytes of parity for error detection and correction are added to data such as 24 bytes of music information, a subcode C indicating the song number and time information, etc. is added to the beginning of the frame. Frames a, which are constructed by adding a frame synchronization signal indicating , are sequentially and continuously recorded.

As shown in FIG. 4, each of the above absolute address information 22 includes a preamble e for playback synchronization, an address mark f indicating the beginning of the absolute address information, and a Information consisting of an address number g indicating a sequentially incremented address (actually also an absolute time of 1 second) and an error detection code h for checking errors during address number recognition is transmitted at a predetermined linear velocity. , a concavo-convex pattern is recorded in advance so that it can be reproduced once per second.

On the other hand, in a disk recording/reproducing apparatus on the driver side, a magneto-optical disk 1 is rotated by a spindle motor 2, as shown in FIG. The optical head 3 records and reproduces information by irradiating the magneto-optical disk l with a laser beam, and among the signals reproduced by the optical head 3, the uneven signal components forming the absolute address information 22 are called uneven signals. The signal is amplified by a reproduction amplifier 4. The address decoder 5 that receives the signal from the uneven signal reproducing amplifier 4 recognizes the address value from this signal and outputs it to the controller 6. The controller 6 not only controls the entire disk recording and reproducing apparatus, but also functions as a control means and a means for detecting defective parts, which will be described later. A rotary encoder 7 that outputs a predetermined number of pulses per rotation in accordance with the rotation of the spindle motor 2 is connected to the spindle motor 2, and the pulses from the rotary encoder 7 are output to a CLV control circuit 8. There is. The CLV control circuit 8 controls the spindle motor 2 to rotate at a constant linear velocity based on the above pulses and the disk radial position information output from the controller 6.

Further, the reproduction amplifier 9 connected to the optical head 3 amplifies the magneto-optical signal component of the signal reproduced by the optical head 3, which corresponds to music information or the like. A reproduction signal processing circuit 10 connected to the reproduction amplifier 9 processes reproduction data such as music information in the data format from the reproduction amplifier 9, extracts and arranges necessary data, and performs error correction processing as necessary. It is designed to do this. TOC memory (memory means) 11 stores TOCwI from among the signals processed by the reproduction signal processing circuit 10.
In addition to storing the contents of the area 23, it is also possible to store information possessed by the controller 6 and information specified by the user (specified using the operation keys 13, which will be described later). A display 12 is connected to the controller 6, and the display 12 is adapted to display song numbers, time information, defective location information, etc. in accordance with the contents of the TOC memory 11. Also, controller 6
An operation key 13 is connected to the operation key 13, which allows the user to perform various designations, such as designation of a defective location.

The controller 6 also serves as a control means for prohibiting writing or reading from a defective area when there is a writing or reading instruction to a defective area in a recording or reproduction instruction from a user. As means for inhibiting recording/reproduction, the driving of the optical head 3 is prevented, and
There is a method of returning control that has been transferred to a routine for recording or reproducing information in the controller 6 to a routine that waits for key human power.

Further, the controller 6 also serves as a defective location acquisition means for determining the defective location on the disk l.

That is, the controller 6 can receive the defective location information specified by the user using the operation keys 13 as is to obtain the defective location. A value may be input, or the controller 6 may convert the input value into an absolute address value by providing the disk radial position range corresponding to the defective location in millimeters. Of course, it is also possible for the controller 6 itself to determine and learn the defective location. An example of the determination by the controller 6 itself is to determine whether or not the absolute address information read during continuous recording or playback changes in the regular order, and if it is not in the regular order, track skipping etc. will occur. It is determined that the corresponding absolute address is the starting position of the defective location. Regarding the end position of the defective part, continuous playback is restarted from, for example, 5 seconds after the defective start position, and if there is no abnormality, the absolute address corresponding to the start position is again set as the end position of the defective part. If there is a further defect, the data is continuously reproduced from 5 seconds ahead, and thereafter this operation is repeated to detect the end position of the defective part.

The digital audio data string from the reproduced signal processing circuit IO is converted into an analog signal by the D/A converter 14 connected to the reproduced signal processing circuit 10, and this analog signal is output to the outside (Sout).

An analog signal from the outside (Sin), such as music information, is converted into a digital signal by an A/D converter 15, and this signal is output to a recording signal processing circuit 16. The recording signal processing circuit 16 receives a digital audio data string from the A/D converter 15 or a T data stream from the TOC memory 11.
A process of converting the OC information into a recording data string corresponding to the data format described above is performed. The coil driver 17 drives the magnetic coil 18 according to the recording signal from the recording signal processing circuit 16. The magnetic coil 18 applies an external magnetic field corresponding to a recording signal to the magneto-optical disk l. Recording signal processing circuit 16, coil driver 17
, and the magnetic coil 18 constitute a recording means for re-recording the contents stored in the TOC memory 11 in the TOC area 23 as additional information.

Here, control for keeping the linear velocity of the magneto-optical disk l constant will be described. When the magneto-optical disk 1 is loaded onto the spindle motor 2, the controller 6 controls an optical head moving mechanism (not shown) to move the optical head 3 to a radial position corresponding to the TOCfin area 23, and also performs C and LV control. Disk radial position information corresponding to the above-mentioned radial position is supplied to the circuit 8. Based on the disk radial position information given from the controller 6, the CLV control circuit 8 determines the necessary number of rotations required to achieve a predetermined linear velocity, determines the pulse frequency reference value of the rotary encoder 7 corresponding to the number of rotations, and By controlling the actual output pulse frequency of the rotary encoder 7 to be the same as the pulse frequency reference value, the magneto-optical disk 1 is rotated at the required linear velocity. The optical head 3 outputs absolute address information as a reproduced signal, which is amplified by the uneven signal reproducing amplifier 4, and then recognized by the address decoder 5 and inputted to the controller 6. In addition, regarding the rotation control up to this point, taking into account variations in mechanical accuracy, etc., the disk radial position information is not necessarily the same as the actual position, and therefore does not reach an accurate predetermined linear velocity. At this stage, it is acceptable as long as the absolute address information is within a linear velocity error that can be reproduced and recognized. Thereafter, the controller 6 sequentially outputs accurate radial position information to the CLV control circuit 8 based on the absolute address value from the address decoder 5, so that accurate CLV control is thereafter executed regardless of the presence or absence of recorded information. .

Next, recording of music information etc. will be explained. External (Sin
) is input to the A/D converter 1.
5, the signal is converted into a digital signal by the recording signal processing circuit 1.
After the predetermined formatting is performed by the magneto-optical disk 6, a magnetic field corresponding to the recording data is applied to the magneto-optical disk l by the magnetic coil 18 via the coil driver 17. In parallel with this, the optical head 3 emits a relatively high output DC light beam necessary for recording onto the magneto-optical disk.
Information recording is performed by lowering the coercive force of the area that is irradiated and causing a local temperature rise, and causing magnetization reversal by the applied magnetic field.This method is generally called magnetic field modulation recording, and has already been developed. This method allows overwriting even in recorded areas.

On the other hand, in the reproduction operation of music information, etc., the optical head 3 detects the polarized light component according to the magnetization direction of the laser beam irradiated onto the rotating magneto-optical disk 1 as the intensity of the light, and this signal is sent to the reproduction amplifier 9. After being amplified by the reproduction signal processing circuit 10, it is returned to the original digital audio data and output to D/D.
The A converter 14 outputs an external (So
ut).

The controller 6 determines the defective location based on the absolute address information read when recording and reproducing the music information, and also stores this defective location information in the TOC memory 1.
Output to 1. The TOC memory 11 stores the above defective location information. The determination of the defective location is performed by the controller 6 as described above.

The operation of copying the contents of the TOC memory 11 to the TOC8I area 23 as additional information can be performed, for example, when removing the magneto-optical disk 1 from the spindle motor 2, or by manually specifying the operation key 13 at a time when the user deems it necessary. Record the contents of 11 Signal processing circuit 16
After converting into a predetermined format, the recording process is performed in the same way as described above. Therefore, even if the disc 1 is ejected from the disc recording/reproducing apparatus, the defective location information is retained within the disc. Next, when the disk 1 is loaded, the above defective location information is read from the TOCSff area 23 and stored in the TOC memory 11, and recording/playback prohibition control is performed according to the contents, and such recording/playback is prohibited. If a new defective location is determined at this time, the information is temporarily stored in the TOC memory 11 and then transferred to the TOC9N area 23, and the defective location information in this TOC area 23 is updated.

Next, the reproduction operation in the TOCjtl area 23 will be explained. The information content in the TOC area 23 includes, for example, a song number such as music information recorded in the program area 24, a failure start position and a failure end position for a failure part, etc., corresponding to the absolute address information 22. It is something that The magneto-optical disk 1 is the spindle motor 2
When the magneto-optical disk 1 is loaded, the controller 6 moves the optical disk 3 to the TOC area 23 as described above, and loads the optical disk 1.
is rotated at a constant linear velocity to reproduce the contents of the TOC8N area 23, and if recorded information exists in the TOC area 23, it is stored in the TOC memory 11. For example, assume that the information in Table 1 below is already recorded.

The first table controller 6 detects defective areas 35° 00" to 37° 30" and 45'OO" when recording and reproducing music information based on the information in the first table taken into the TOC memory 11. ~50° 00°.

Control is performed to prohibit this section during recording and playback. As mentioned above, prohibition of recording and reproduction prevents the drive of the optical radar 3 and also controls the controller 6.
In this step, an operation is performed such as returning control that has been transferred to a routine for recording or reproducing information to a routine that waits for key human power.

As a result, in a disk that has some defective areas, it is possible to eliminate the use of only those part of the defective area and effectively use other good areas.
This eliminates the waste of discarding a disk just because it has a defective part, which was the case in the past. In addition, since the defective area is recorded in the TOCSJi area, there is no need for the user to record the location of the defective area on paper, etc., and the disc recording/playback device itself can record the music information without the user's intervention. Prior to recording/playback, information on defective locations can be obtained and appropriate countermeasures can be taken.

Note that, as described above, instead of displaying the absolute address information corresponding to the defective location on the display 12,
As shown in FIG. 5, on the display means 30 having a bar-shaped lightable area, a defective area is treated the same as a used area, and bright and dark areas are formed in analog display on the display means 30 in correspondence with these areas. This allows the user to recognize the recordable area (recordable capacity and recordable position) at a glance.

In addition, as a method for determining defective locations, in addition to those related to servo abnormalities including track skipping as described above, it is also possible to monitor cases where the number of errors during playback exceeds the correctable range, abnormalities in the amplitude of the playback signal, etc. There is a method for determining this.

〔Effect of the invention〕

As described above, the disc recording/reproducing device according to the present invention has the following features:
In a disk recording and reproducing device using a rewritable disk having absolute address information and a recording area comprising a program area for recording recorded information and an `rOC area for recording additional information of the recorded information,
A defective part acquiring means for acquiring the defective part about the disk, a memory means for storing the defective part information from the defective part acquiring means, and a memory means for storing the contents stored in the memory means as additional information in the TOC area. This configuration includes a recording means for re-recording, and a control means for inhibiting reproduction and recording of recorded information regarding the defective location based on the defective location information.

This eliminates the waste of discarding a disk just because it has a defective part. In addition, there is no need for the user to record the location of the defective area on paper, etc., and the disk recording/playback device itself can obtain defective location information before recording/playing music information without any user intervention. This has the effect that appropriate measures can be taken.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention. FIG. 1 is a schematic block diagram showing the circuit configuration of a disc recording/reproducing apparatus. FIG. 2 is a schematic diagram showing the recording format of a magneto-optical disk. FIG. 3 is a structural diagram showing a formatter for one frame of a recording signal. FIG. 4 is a structural diagram illustrating the format of absolute address information. FIG. 5 is an explanatory diagram showing a state in which bright and dark areas are formed in analog display on the display means in correspondence with defective areas in the same way as used areas. 1 is a magneto-optical disk, 3 is an optical head, 6 is a controller (control means/defect location detection means), 11 is a TOC memory (memory means), 12 is a display, 13 is an operation key, 16 is a recording signal processing circuit (recording 17 is a coil driver (recording means); 18 is a magnetic coil (recording means);
21 is a track, 22 is absolute address information, 23 is T
The OC area 24 is a program area, and 30 is a display means.

Claims (1)

[Claims] 1. Disk recording using a rewritable disk having absolute address information and a recording area comprising a program area for recording recording information and a TOC area for recording additional information of the recording information. In the playback device, there is provided a defective part obtaining means for obtaining the defective part on the disc, a memory means for storing the defective part information from the defective part obtaining means, and a content stored in the memory means as additional information. A disc recording and reproducing apparatus comprising: a recording means for re-recording in a TOC area; and a control means for inhibiting reproduction and recording of recorded information regarding the defective location based on the defective location information.