KR0130604B1 - Reproducing method for magneto-optical disc - Google Patents

Abstract

The play-recording method of an optical magnetic disk is comprised of (a) performing track number setting and fellow time setting regarding a track which needs the fellow record in fellow time record mode, after that, upon the fellow mode being set, setting laser power as for playback by a servo control circuit(12) and performing playing operation with respect to the track corresponding to the set track number; (b) upon playing of the corresponding track being terminated, setting the laser power as for record by the servo control circuit(12) and driving a magnetic head(6) to perform recording for the set fellow time, then increasing the track number by one; (c) performing repeatedly a series of operations in which the playing operation and the record operation are performed with respect to the track corresponding to the track number set afterwards.

Description

Playback recording method of magneto-optical disc

1 is a block diagram of a magneto-optical disk as an example to which the reproduction / recording method of the magneto-optical disk according to the present invention is applied.

2A to 2C are flowcharts for explaining a recording / reproducing method of an magneto-optical disc according to the present invention.

3 is a diagram showing a sector structure as an example in which the UTOC-flag is recorded in a predetermined sector of the UTOC area of the magneto-optical disk.

4 is a diagram showing a sector structure as an example in which the fellow time is recorded in a predetermined sector of the UTOC area of the magneto-optical disk.

5 is a diagram showing a sector structure as an example in which the fellow recording position is recorded in a predetermined sector of the UTOC area of the magneto-optical disk.

* Explanation of symbols for main parts of the drawings

2: magneto-optical disk 4: spindle motor

6: magnetic head 8: optical pickup

10: RF amplification circuit 12: servo control circuit

14 decoder 16 TOC memory

18: microcomputer 20: memory

22: decoder 24: digital / analog converter

26: low pass filter 28: digital output unit

30: key input section 32: display drive circuit

34 display unit 36 magnetic head drive circuit

38: encoder 40: memory

42: encoder 44: analog / digital converter

46: low pass filter

The present invention relates to a reproducing and recording method of a magneto-optical disc. More specifically, the magneto-optical disc player for recording and reproducing the magneto-optical disc reproduces a predetermined time period of the magneto-optical disc and then records a predetermined time. Then, the present invention relates to a reproducing and recording method of a magneto-optical disc which automatically repeats playback of the next area and recording again.

Currently, magneto-optical discs have been developed and used as optical discs capable of recording and reproducing by a user. The recording principle of such a magneto-optical disk is to irradiate light on the surface of the disk using a laser power of approximately 4 mW, so that the temperature of the optical spot is raised to Curie Temperature (approximately 180 °). The current flows in the direction to be written in the magnetic head of the magnetic head. The position of the optical spot is moved by the rotation of the disk, so that the portion through which the optical spot passes is cooled according to the polarity of the magnetic head, thereby having magnetic properties. The reproducing principle irradiates light onto the disc surface using a laser power of approximately 0.6 mW, and the polarization plane of the light incident on the disc by the Kerr effect is in the forward or reverse direction according to the polarities N and S of the magnetic material on the disc. It is reflected by rotating about 0.2 to 0.3 degrees, passing through the polarizing beam splitter, and incident on two light receiving elements provided at predetermined intervals. At this time, an antiphase signal is generated in the light receiving element, and the polarities N and S of the magnetic material on the disc can be read as data corresponding to 1 or 0 based on the antiphase signal.

The magneto-optical disc player capable of reproducing / recording the magneto-optical disc includes a spindle motor 4 for rotating the magneto-optical disc 2 and a laser beam having a predetermined reproducing power as shown in FIG. The magnetic head 6 is irradiated to the optical magnetic disk 2 by reading the data recorded on the optical magnetic disk 2 by irradiating the disk 2 or by irradiating the optical magnetic disk 2 with a laser beam having a recording power higher than the predetermined power. Optical pickup 8 for recording data by means of a spindle, a spindle servo operation for controlling the rotation of the spindle motor 4, a head feed servo operation for controlling the transfer of the optical pickup 8, and the optical pickup 8 Focusing / tracking servo operation to control the focusing and tracking of the laser beam by moving the objective lens (not shown) installed up and down and left and right, and laser power servo controlling the intensity of the laser beam. Servo control circuit 12 for performing the operation, RF amplification circuit 10 for amplifying and shaping the RF signal read from the magneto-optical disk 2 by the optical pickup 8, and outputted from the RF amplification circuit 10 A decoder 14 which decodes an RF signal in an EFM (Eight to Fourteen Modulation) scheme, a memory 20 which temporarily stores data decoded by the decoder 14, and data from the memory 20, for example. Decoded by ATAC (Adaptive Transform Acoustic Codin g) and output to analog output terminal (Aout) via digital / analog converter 24 and low pass filter 26 or digital output 28 through digital A decoder 22 for outputting to the output terminal Dout, a TOC memory 16 for reading out and storing data recorded in the TOC (Table Of Content) area of the optical disc 2, and an analog input terminal (Ain); The god inputted through the low pass filter (46) The analog / digital conversion unit 44 for analog / digital change, the encoder 42 for encoding the output of the analog / digital conversion unit 44 by, for example, ATAC method, for temporarily storing the output of the encoder 42 Memory 40 made of RAM, an encoder 38 for encoding data from the memory 40 in an EFM scheme, for example, and a magnetic head 6 based on the recording data from the encoder 38 to drive magneto-optical magnetism. Magnetic head drive circuit 36 for recording data on the disc 6, a 10-key consisting of ten number (0-9) keys, a recording mode key for setting the recording mode, and a playback mode key for setting the playback mode. To a control signal of the microcomputer 18 and the microcomputer 18 that perform a control operation by outputting a control signal to each corresponding component in response to a control key input from the key input unit 30 provided with the back. According to LCD (liquid crystal display) And a display driving circuit 32 which drives the display unit 34, which causes the display unit 34 to display guide letters such as the number of recorded contents (for example, music) recorded on the magneto-optical disc.

In the recording and reproducing method by the magneto-optical disc player, when the recording mode key of the key input unit 30 is operated and a predetermined track (recording area) number is specified, the servo control circuit 12 is controlled by the microcomputer 18. The laser power is set for recording and the analog signal input through the analog input terminal (Ain) is passed to the low pass filter 46, the analog / digital converter 44, the encoder 42, the memory 40, the encoder 38. And the magnetic head driving circuit 36 to be applied to the magnetic head 6 so that a desired analog audio signal can be recorded in a predetermined track (recording area), and the playback mode key of the key input section 30 is If a predetermined track (recording area) number is specified, the laser power is set for reproduction by the servo control circuit 12 under the control of the microcomputer 18, and the optical pickup 8 controls the magneto-optical disc 2. From the corresponding track (recording area) The collected data is transferred to the analog output terminal (Aout) via the RF amplifier circuit 10, the decoder 14, the memory 20, the decoder 22, the digital / analog converter 24, and the low pass filter 26. To be printed.

As described above, since the existing recording and reproducing methods of the magneto-optical disc player are made independently of each other, for example, after reproducing a certain period of the magneto-optical disc, the predetermined data from the outside is recorded for a predetermined time and then the next predetermined period. There has been a problem that it is difficult to perform a repetitive operation such as recording predetermined data from the outside for a predetermined time after reproducing.

Accordingly, the present invention has been made in view of the above circumstances, so that the magneto-optical disc player can play a certain section of the magneto-optical disc, record a predetermined time, and then automatically replay the next area and record again. It is an object of the present invention to provide a method of reproducing and recording a magneto-optical disc.

According to the reproduction recording method of the magneto-optical disk according to the present invention for achieving the above object, in the reproduction recording method of the magneto-optical disk for reproducing the data recorded on the magneto-optical disk and recording the data on the magneto-optical disk If the fellow mode is set after the track number setting and the fellow time setting for the track requiring the fellowship recording in the fellowship time recording mode, the playback operation is performed for the track and then the track is recorded for the set fellowship time. After the number is increased by one, a series of operations for reproducing and recording are continued for the track.

In this case, when the recording operation is performed in the fellow mode, the UTOC flag is recorded in an empty space not defined in a predetermined sector of a predetermined cluster of a UTOC (User Table Of Content) area of the magneto-optical disk. If so, it is preferable to record the fellow time for each track in a predetermined sector which is not defined in a predetermined cluster of the UTOC area of the magneto-optical disk.

When the recording operation is performed in the fellow mode, the address of the fellow recording area for each track is recorded in a predetermined sector which is not defined in a predetermined cluster of the UTOC area of the magneto-optical disk, and the recording operation in the fellow mode is performed. In the subsequent reproducing operation, if the UTOC flag is set after playing the track, the sector in which the address of the fellow recording area of each track is recorded is accessed to access the address of the fellow recording area for the track. It is desirable to regenerate.

According to the present invention configured as described above, when the user sets the fellowship response time in advance and sets the fellowship mode, playback is performed in units of one track and then a long operation is performed for a predetermined fellowship response time, and then the fellowship response time ends. When the playback is performed for the next track, the recording operation is repeated for the predetermined fellow response time. Therefore, after reproducing a certain section, after recording a certain time, the next area is replayed and recorded again.

Hereinafter, the reproduction recording method of the magneto-optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

The FELLOW mode key is further provided in the key input section 32 of the magneto-optical disc player employed in the reproducing and recording method of the magneto-optical disc of the present invention. Is to set the recording mode automatically.

Here, the fellow mode by the fellow mode key further installed in the key input unit 32 is in a state in which the fellow response time and the track number to be played back are set in advance, and during the preset fellowship response time after the playback is performed in one track unit. The recording operation is performed, and when the fellow response time is finished, the playback is performed again for the next track. Then, the recording operation is repeated for the preset fellow response time. Possible fellow response time refers to the time at which the time interval during which recording is permitted is stored.

2A to 2C are flowcharts for explaining the recording and reproducing method of the magneto-optical disc according to the present invention, which will be described in detail with reference to the block diagram of the general magneto-optical disc player of FIG.

That is, in step S1, the microcomputer 18 determines whether the power on key of the key input unit 30 is operated by the user, and when the power on key is operated, the optical pickup 8 is controlled under the control of the servo control circuit 12 in step S2. The TOC area and the UTOC area of the magneto-optical disk 2 are accessed and the TOC (UTOC) data read out from the TOC area is transferred via the RF amplifier circuit 10, the decoder 14, and the memory 20. The data is stored in the TOC memory 16.

Thereafter, in step S3, the microcomputer 18 determines whether the playback mode key of the key input unit 30 is operated by the user, and if the playback mode key is operated, the playback flag register installed inside the microcomputer 18 in step S8 ( After setting the playback flag (not shown), it is determined in step S9 whether the fellow mode key of the key input unit 30 is operated.

If it is determined in step S9 that the fellow mode key has not been operated, the process proceeds directly to the next step (ⓑ), while if it is determined that the fellow mode key has been operated, the process proceeds to step S10 and the fellow flag register installed inside the microcomputer 18. After setting the fellow flag (not shown), the process proceeds to the next step (ⓑ).

On the other hand, if it is determined in step S3 that the playback mode key has not been operated, it is determined whether the record mode key is operated in step S4. If the record mode key is not operated, control returns to step S3.

On the other hand, if the recording mode key is operated in step S4 described above, the recording flag is set in the recording flag register (not shown) installed inside the microcomputer 18 in step S5, and then the fellow mode key is pressed in step S6. If it is determined that the manipulation mode key is operated, the process proceeds to the next step (ⓑ), while if the fellow mode key is not operated, the normal recording flag register (not shown) installed inside the microcomputer 18 in step S7. After the normal recording flag is set in the step, the process proceeds to the next step (ⓑ). Step ⓑ proceeds to step S11 in FIG. 2B.

Next, the normal recording mode when only the recording mode key is operated in the key input routine of FIG. 2A will be described. In the normal recording mode, only the recording flag and the normal recording flag are set in the above-described steps S5 and S7.

That is, first, the control inputted through step ⓑ of FIG. 2B proceeds to step S11 to determine whether a write flag is set in the write flag register (not shown), in which case the write flag is set. In S12, it is determined whether the normal recording flag is set in the normal recording flag register. At this time, since the normal recording flag is set, the control proceeds to step S17, and the microcomputer 18 controls the servo control circuit 12 to set the laser power for recording and the analog input through the analog input terminal Ain. The signal is applied to the magnetic head 6 via a low pass filter 46, an analog / digital converter 44, an encoder 42, a memory 40, an encoder 38 and a magnetic head drive circuit 36. Recording of the desired analog audio signal is started.

Thereafter, in step S18, it is determined whether the normal recording flag is set in the normal recording flag register. Since the normal recording flag is set, the microcomputer 18 determines whether or not the recording is completed in step S23.

At this time, if it is determined that the recording has been completed, the start address and the end address are accessed by accessing the pointer of the recording contents (track) from the sector = 0 (see FIG. 3) of the first cluster of the UTOC area of the TOC memory 16 in step S24. And if necessary, update the link pointer LINK-P, and then, under the control of the microcomputer 18, set the laser power for recording and write the laser power to the TOC memory 16 and the UTOC area. The UTOC area is updated (edited) by applying data to the magnetic head 6 via the memory 40, the encoder 38, and the magnetic head drive circuit 36. Then, in step S25, the write flag set in the write flag register is cleared, and control returns to the one step S3.

Next, the general playback mode in which only the playback mode key is operated in the key input routine of FIG. 2A will be described. In the normal playback mode, only the playback flag is set in step S8.

That is, in step S11 of FIG. 2B, the microcomputer 18 determines whether the current recording flag is set, and since the recording flag is not set, the control proceeds to step ⓒ. The flow proceeds to step S26.

In step S26, it is determined whether or not the playback flag is set in the playback flag register (not shown). At this time, the playback flag is set, so the playback operation is started in step S27. In the reproducing operation of step S27, the microcomputer 18 controls the servo control circuit 12 to set the laser power for reproducing and read the data read by the optical pickup 8 to the RF amplifying circuit 10 and the decoder 14 ), The memory 20, the decoder 22, the digital / analog converter 24, and the low pass filter 26 are outputted to the analog output terminal Aout through the output. Audio output through the speaker not shown.

Thereafter, in step S28, the microcomputer 18 determines whether playback of one track has ended, and if so, determines whether the UTOC flag is set in step S29, where the UTOC flag is set as shown in FIG. In the data structure of sector = 0 of the first cluster of the UTOC area of the memory 16, for example, 11111111 or 0 is written in the 29th byte. At this time, since the UTOC flag is not set (in this case, the case in which the fellowship recording is not performed in the fellowship mode), it is determined whether the fellow flag is set to proceed to step S34. At this time, since the fellow flag is not set, the control proceeds to step S37 to determine whether there is a power-off input as the user operates the power key installed in the key input unit 30.

At this time, if there is a power-off input, the laser power is set for recording by the servo control circuit 12 under the control of the microcomputer 18 in step S38, and the data of the UTOC area of the TOC memory 16 is stored in the memory 40. ) Is applied to the magnetic head 6 via the encoder 38 and the magnetic head drive circuit 36 to update (edit) the UTOC area of the magneto-optical disk 2, and then turn off the power in step S39. End all control. On the other hand, if it is determined in step S37 that there is no power-off input, the control proceeds to step S40 to determine whether there is an end mode input as the user operates the end key installed in the key input unit 30. After all the flags are cleared in step S42, the control returns to the above-mentioned step S3, while if there is no end mode input, the track number is increased by 1 in step S41, and then the control returns to the above-mentioned step S3 to make the above-mentioned first step. If there is no new key input in the key input routine of FIG. 2a, the control proceeds to step S26 via step S11 of FIG. 2b with the normal playback mode maintained, and judges whether or not the playback flag is set. At this time, since the playback flag is set, the control starts playback of the track updated in step S41 in step S27, and then proceeds to steps S28, S29, step S34, step S37, step S40, and step S41. The reproducing operation is continued while increasing the reproducing track number until the reproducing operation is made into the all-on-off input or the stop mode and the new mode input in Fig. 2A.

On the other hand, if it is determined in step S29 that the UTOC flag is set (in this case, the case in which the fellowship recording is performed in the fellowship mode), the control proceeds to step S30 to determine whether the fellowship time is set. If it is judged that the time setting is not made (in this case, the case in which the fellow recording time for the fellow recording is not assigned to the track played immediately before the fellowship recording in the fellow mode), the control proceeds to step S31. Read the pointer (play link pointer) of the fellow recording track for the track played immediately before, access the corresponding address to start playback, and judge whether or not the playback has ended in step S32. After clearing, the process proceeds to step S26 described above. Here, the fellow recording pointer is any one of sectors (for example, cluster 0 (first cluster) to cluster 2 of sector 2 to sector 31 of cluster 2 (first cluster) where information is not recorded in the UTOC area of the TOC memory 16), similarly to the fellow recording time. As shown in FIG. 5, a sector or one of data sectors in clusters 3 to cluster 47) can be set for up to 255 tracks corresponding to each track, for example, from 46 bytes (for each track). P-FNO 1 to P-FNO 255), the actual address of each fellow recording area is recorded in a repetitive form of a start address and an end address in units of, for example, 304 bytes and 4 bytes.

Next, a description will be given of the fellow time setting mode in which the recording mode key is operated only by the fellow mode key in the key input routine of FIG. 2A. Here, the fellow time setting mode is a state in which only the recording flag is set in step S5.

That is, in step S11 of FIG. 2B, the microcomputer 18 determines whether the recording flag is set. In this case, since the recording flag is set, the control proceeds to step S12 to determine whether the normal recording flag is set. In this case, since the normal recording flag is not set, the control proceeds to step S13 to determine whether the fellow flag is set. At this time, since the fellow flag is not set, the control proceeds to step S14 and step S15 and requires a track recording. Track number setting and fellow time setting are made by manipulating the 10-key of the key input unit 30 with respect to.

Thereafter, when the time setting is finished, the flow advances to step S17 to perform a write operation for the time setting performed in step S15, whereby no sector is recorded in the UTOC area of the TOC memory 16 (e.g., cluster 0). (First cluster) to any one of sectors 3 to 31 of the cluster 2, or any sector of the data sectors in the clusters 3 to cluster 47), as shown in FIG. 4, for example, each track from the 50th byte. Correspondingly, the fellow time is recorded for up to 255 tracks (P-FLT 1 to P-FLT 255 for each track).

Subsequently, it is determined whether or not the normal recording flag is set in step S18. Since the normal recording flag is not set, control proceeds to step S19 to determine whether the fellow flag is set. At this time, since the control flag is not set and the control proceeds to step S23 to determine whether the recording of the time is completed, the laser power is controlled by the servo control circuit 12 under the control of the microcomputer 18 in step S24. A magneto-optical disc (i.e., a recording device) is set for recording and the data of the UTOC area of the TOC memory 16 is applied to the magnetic head 6 through the memory 40, the encoder 38 and the magnetic head drive circuit 36. Update (edit) the UTOC area in 2). Then, in step S25, the write flag set in the write flag register is cleared, and control returns to the above-described step S3.

Subsequently, a description will be given of the fellow mode in which only the regeneration mode key and the fellow mode key are operated in the key input routine of FIG. 2A. Here, the fellow mode is a state in which the regeneration flag is set in step S8 and the fellow flag is set in step S10.

That is, in step S11 of FIG. 2B, the microcomputer 18 determines whether the current recording flag is set, and since the recording flag is not set, the control proceeds to step ⓒ. The flow proceeds to step S26.

In step S26, it is determined whether or not the playback flag is set in the playback flag register (not shown). At this time, the playback flag is set, so the playback operation is started in step S27.

Thereafter, in step S28, the microcomputer 18 determines whether playback of one track has ended, and if so, determines whether the UTOC flag is set in step S29. At this time, since the UTOC flag is not set, control proceeds to step S34. It is determined whether the fellow flag is set. At this time, since the fellow flag is set, the recording flag and the playback flag are set in steps S35 and S36, respectively, and then the control proceeds to step S37 to determine whether there is a power off input. It is determined whether there is an end mode input. If there is no end mode input, the track number is increased by 1, and then control returns to the above-described step S3.

Thereafter, if there is no new key input in the key input routine of FIG. 2a, the control proceeds to step S11 of FIG. 2b while the fellow mode is maintained. At this time, since the recording flag is set in step S35, the control proceeds to step S12. The normal recording flag is not set, so it is determined whether the fellow flag is set in step S13. Here, since the fellow flag is set, the control proceeds to step S16, where the fellow time data for the track before the track number is increased by 1 in step S41 (corresponding to the corresponding track among P-FLT1 to P-FLT255 in FIG. 4). The control proceeds to step S17.

In the step S17, the microcomputer 18 controls the servo control circuit 12 to set the laser power for recording and outputs the analog signal input through the analog input terminal Ain and the low pass filter 46 and the analog / digital converter. (44), the encoder 42, the memory 40, the encoder 38, and the magnetic head drive circuit 36 are applied to the magnetic head 6 to start recording of the desired analog audio signal (where , The recorded content corresponds to the response to the question of the track reproduced in step S28).

Then, it is determined whether or not the normal recording flag is set in step S18. Since the normal recording flag is not set, it is determined whether the fellow flag is set in step S19, and since the fellow flag is set, the read flag is read in step S16 in step S20. Determine if the fellow time has elapsed. When the fellow time has elapsed in step S20, the control proceeds to step S21 where the start address and the end address where the fellow recording is performed in step S17 are accessed by accessing the fellow recording pointer for the track before increasing the track number by one in step S41. After updating the address, the UTOC flag is set as shown in FIG. 3 in step S22.

Then, control proceeds to step S24, under the control of the microcomputer 18, the laser power is set for recording by the servo control circuit 12, and the data of the UTOC area of the TOC memory 16 is stored in the magnetic head 6; After updating (editing) the UTOC area of the magneto-optical disc 2 by applying to, the recording flag is cleared in step S25, and control returns to step S3 described above.

Next, if there is no new key input in the above key input routine of FIG. 2A, the control proceeds to step S11 of FIG. 2B while the fellow mode is maintained, in which case control is performed because the recording flag is cleared in step S25. In step S26, the process proceeds to step S27 to perform the playback operation for the track updated in step S41. If it is determined in step S28 that the playback operation for the track has been completed, it is determined whether the UTOC flag is set in step S28. In this case, since the UTOC flag is set in step S22, the control proceeds to step S30.

In the step S30, it is determined whether the setting of the fellow time has been made for the track currently reproduced. In this case, since the fellow time has been set (in this case, the fellowship recording for the track played immediately before the fellowship recording in the fellow mode) is performed. If a fellow recording time is allocated for the control), control proceeds to step S33 to clear the playback flag and then to step S26. However, since the playback flag is cleared, the control proceeds to step S41 via step S34, step S35, step S36, step 37, and step S40 to increase the track number by 1 and then to step S3.

Then, if there is no new key input in the key input routine of FIG. 2A, the control proceeds to step S11 in FIG. 2B with the fellow mode maintained, and playback of one track by the fellow mode and the fellowship recording thereof are repeated. Done.

As described above, according to the present invention, when the user sets the fellowship response time in advance and sets the fellowship mode, playback is performed in units of one track, and then a recording operation is performed for a predetermined fellowship response time, after which the fellowship response time ends. When the first track is reproduced, the recording operation is repeated for a predetermined fellow response time. Therefore, there is an advantage in that the present invention can be recorded, for example, for a verbal test or an unmanned mailbox, in which each response can be recorded for one track unit of question.

Claims (5)

Playback recording of the magneto-optical disc for reproducing data recorded on the magneto-optical disc and recording data on the magneto-optical disc in accordance with the setting operation of the laser power by the servo control circuit 12 and the recording operation of the magnetic head 6 In the method, when the fellow mode is set after the track number setting and the fellow time setting for the track requiring the fellowship recording in the fellowship time recording mode, the servo control circuit 12 sets the laser power for reproduction. After the playback operation is performed on the track corresponding to the set track number, when the playback of the track ends, the servo control circuit 12 sets the laser power for recording and drives the magnetic head 6 to perform the above-mentioned operation. After recording for the set fellow time, the track number is increased by 1, and then the playback operation is performed also for the track corresponding to the track number set thereafter. Reproducing the recording method of the magneto-optical disc which is characterized by being a process of performing a series of operations repeatedly perform the recording operation. The reproduction of the magneto-optical disc according to claim 1, wherein when the recording operation is performed in the fellow mode, the UTOC flag is recorded in an undefined space in a predetermined sector of a predetermined cluster of the UTOC area of the magneto-optical disc. How to record. 3. The reproduction recording of the magneto-optical disc as claimed in claim 2, wherein, when the fellow mode time setting is made, the time for each track is recorded in a predetermined sector not defined in a predetermined cluster of the UTOC area of the magneto-optical disc. Way. 4. The magneto-optical device according to claim 3, wherein when the recording operation is performed in the fellow mode, the address of the fellow recording area for each track is recorded in a predetermined sector which is not defined in the predetermined cluster of the UTOC area of the photonic disc. Disc recording and recording method. 5. The playback operation according to claim 4, wherein in the playback operation following the recording operation in the fellow mode, if the UTOC flag is set after playing the track, the sector in which the address of the fellow recording area of each track is recorded is accessed. And reproducing by accessing an address of a fellow recording area for said track.