JP2798516B2 - Information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording / reproducing external information on a recordable recording medium such as various rewritable optical disks by using a so-called incomplete interleaving method. .

[0002]

2. Description of the Related Art Conventionally, a so-called compact disk (hereinafter referred to as a CD) in which continuous information such as music information is recorded as digital signals by optically detectable minute pits has been widely used. This CD is for playback only.
Reproduction is performed by the D player.

FIGS. 8 and 9 are schematic diagrams for explaining a signal format used in a CD. As shown in FIG. 8, one frame 31a of the recording signal includes a frame synchronization signal 31b indicating the beginning of the frame, a subcode 31c (details will be described later) which is additional information of data, and 2 which is main information.
It is composed of a data field 31d obtained by adding a parity code for error detection and correction to 4-byte data.

[0004] The data in the data field 31d is stored in a CIRC (Cross Interleaved Reed Sod) described later.
Error detection and correction are performed by an error detection and correction method with incomplete interleaving called lomon code).

As shown in FIG. 9, 98 frames (constituting one sector 32a (one subcoding frame))
Sub-code 31c constitutes one sub-coding block 32c, and this sub-coding block 32c
Indicates a track number (called a song number if the data is music information), absolute address information on the disc, and the like. The frame synchronization signal 32b and the data field 32d correspond to the frame synchronization signal 31 in FIG.
This shows a state in which 98b and the data field 31d are collected for 98 frames.

If the length of one sector 32a, that is, the sector length is, for example, 13.3 [ms], one second is obtained for 75 sectors. At this time, the sector number on the disk can be represented by a combination of "minute": "second": "sector number within one second (that is, any value from 0 to 74)" based on time. The sector number forms continuous time information and position information that sequentially increase from the innermost circumference of the disk.

FIG. 7 is a schematic diagram showing an area arrangement on a disk in a CD. The disk 33 includes a main information recording area 33a including main information such as music information and a sector number according to the subcode, and additional information regarding each piece of main information recorded in the main information recording area 33a, for example, a track number and TOC (Table Of Contents) area 33 in which the recording start sector number of the track is indicated by a subcode
b.

According to the format described above, the CD player loads the TOC area 3 when the disc 33 is loaded.
By reading the subcode information of 3b, the number of each piece of main information (corresponding to the number of music pieces in the case of music information) and the sector number of the recording start position are recognized, and a desired track is sent to a subsequent reproduction instruction. Access to the TOC area 33
b and the main information recording area 3
This is quickly executed by checking the sector number with the subcode recorded in the sub-code 3a.

In the above CD, recording is performed at a constant linear velocity (CLV).
(Constant Linear Velocity)) method,
The recording density is constant at any radial position on the disk 33, whereby the recording capacity can be improved.
In an actual CD player, at the time of reproduction, the rotation of the disc 33 is controlled so that, for example, the interval of the frame synchronization signal in the reproduction signal from the CD recorded in the above signal format becomes the reference length. CLV control is realized.

On the other hand, when various kinds of information such as music information or computer information are recorded and used on a rewritable optical disk such as a magneto-optical disk which has been developed in recent years, a conventional CD or CD-ROM (Compact Disk-Read Only M
It is desirable to provide a compatible information recording / reproducing apparatus by sharing a reproducing method with the emory).

In this case, especially on an optical disk on which information is not recorded, there is no absolute address using a subcode according to the signal format of the CD or a frame synchronization signal which can be used for CLV control. An access operation to an arbitrary sector position prior to the operation cannot be performed, and a CLV required for recording and reproduction is not required.
Control becomes impossible.

Therefore, as a recording method of an absolute address instead of the recording by the sub-code, each bit is set to “0” or “1” after bi-phase mark modulation of the absolute address.
The guide groove of the optical disk is shifted inward or outward in the radial direction of the disk, or the width of the guide groove is changed depending on the type of the optical disk (Japanese Patent Laid-Open No. 1-396).
No. 32).

In this case, the frequency band of the absolute address by the biphase mark modulation and the EFM (Eight to Fourt) are used.
If the frequency band of the modulated recording information is made different, it is possible to separate them from each other and reproduce them. An access operation can be performed using the absolute address.

Also, in the CLV control, accurate speed control can be performed by using the reproduced carrier component of the absolute address, and the CLV control can be performed even during recording.

A rewritable optical disk compatible with a CD as described above is a form capable of efficiently recording various kinds of information such as character information in addition to music information, particularly as a home information recording medium. It is desirable to do.

[0016]

However, if information is to be rewritten using the CD signal format, the information of the target physical sector position is not recorded on the actual disk by the above-mentioned non-complete interleaving method by CIRC. Since the data is distributed over a plurality of sectors, it is difficult to rewrite only the desired sector (for details, refer to Japanese Patent Laid-Open Publication No.
No. 5787).

According to the CD format, the recording information is all continuous. However, if a part of the recording data is rewritten, the vicinity of the recording start point and the ending point of the rewritten data may be different from the preceding and succeeding data. Since the link between the error corrections is lost, a reproduction error is likely to occur.

To prevent this reproduction error, for example,
It is conceivable to provide an additional sector before and after data to be actually recorded / reproduced in order to record dummy data including a parity code for correcting an error that may occur at the start or end of the data.

For example, in the case of the CD format, the CIR
In order to exhibit the original correction capability of C, a code propagation length by an incomplete interleaving method requires 105 frames.
It is desirable to provide additional sectors before and after (105/98) 1.07 sectors, that is, substantially every two sectors. The additional sector at the front is the P from the re-recording start point.
It is also useful as a pull-in area for LL (Phase Locked Loop). However, when an additional sector is provided, the use efficiency of the disk decreases.

Incidentally, in order to minimize the decrease in the disk use efficiency due to the provision of the additional sector, the number of sectors constituting the minimum information rewriting unit (hereinafter, referred to as a block) per time is increased. This will approach the CD's original usage efficiency. However, constructing a block having a sufficiently large number of sectors for all types of information is not suitable for use in information having a small data amount, such as character information, and also has a problem in that the required recording time is unnecessarily long. .

For a higher-level device (a so-called personal computer or the like) that manages various types of information, generally,
It is desirable to be able to record and reproduce data in sector units or block units as in the case of a conventional floppy disk or hard disk. However, according to the above-described format, each time recording is performed, before and after the sector, for example, an additional sector of two sectors is added. Therefore, a sector corresponding to the additional sector needs to be transferred together.

Further, when performing an information rewriting operation, it is necessary to manage sectors that can be used as a data area and the above-mentioned unusable additional sectors, and the management becomes extremely complicated.

In the case of a large amount of information such as digital music information and a large number of sectors to be recorded at one time,
Even if no additional sector is provided, the beginning and end of the information are slightly interrupted, and the effect is small.Also, in the case of music information, there is not much trouble in hearing, but the number of sectors to be recorded at a time such as character information etc. In the case of a small number, it is generally necessary to provide an additional sector, and the various problems as described above occur accordingly.

[0024]

In order to solve the above-mentioned problems, an information recording / reproducing apparatus according to the present invention uses a recordable recording medium in which a physical sector number of a recording area is given by a prerecorded address. In an information recording / reproducing apparatus for recording / reproducing information by using an incomplete interleaving method, an n ₁ front additional sector (front dummy sector) and a rear It was added n ₂ pieces of the rear additional sector (rear dummy sector) to (n +
calculating means for calculating a physical sector number based on a block number of a block on which recording or reproduction is performed in units of a block composed of (n ₁ + n ₂ ) sectors; The information is divided into n effective sector units, and the front additional data to be recorded in the front additional sector and the rear additional data to be recorded in the rear additional sector are generated and added for each effective sector information. Recording means for recording information in the sector having the physical sector number obtained by the arithmetic means, and recording means for continuously recording information in the sector having the physical sector number obtained by the arithmetic means when the information to be recorded is continuous information; The recording means,
When the information to be recorded is discrete information or continuous information
Recording is performed by a common non-complete interleaving method .

[0025]

According to the above arrangement, a higher-level device (for example, a personal computer or the like) connected to the information recording / reproducing apparatus itself gives an additional sector necessary for recording / reproducing using an incomplete interleave system. The information recording / reproducing apparatus can record / reproduce discrete information such as characters and code data only by specifying a block number of a block on which recording or reproduction is performed.

Further, the upper device can issue a recording / reproducing instruction by designating an address in block units, and does not need to add and transfer data relating to an additional sector, and easily manages information. be able to.

Further, according to the information recording / reproducing apparatus, continuous information such as music information to be recorded by using an incomplete interleaving method can be mixedly recorded on the same recordable recording medium as the discrete information. Therefore, various types of information can be recorded and reproduced on one type of recordable recording medium.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIG. 5, a magneto-optical disk 1 as a rewritable recording medium has a TOC at its inner peripheral end.
The area 1a is provided, and most of the area closer to the outer periphery than the TOC area 1a is an information recording area 1b.

In the information recording area 1b, music information,
Various information such as characters, images, and code data are recorded. On the other hand, in the TOC area 1a, additional information relating to each information recorded in the information recording area 1b, for example, a start block position and an end block position for each information Etc. are recorded.

As shown in FIG. 6, spiral guide grooves 2.2 (shown by hatching for convenience) are provided in the TOC area 1a and the information recording area 1b of the magneto-optical disk 1 at predetermined intervals in the radial direction of the disk. It is formed apart.

After the bi-phase mark modulation, the absolute address on the disk corresponds to whether each bit is "1" or "0" and the guide grooves 2.2 are formed on the magneto-optical disk 1. It is recorded by offsetting radially outward or inward. The absolute address represents a position on the disk and is also used as rotation control information when performing CLV control or the like. Since the absolute address in this embodiment corresponds to each sector in the CD format, the absolute address is hereinafter referred to as a physical sector number.

In the block diagram of FIG. 4, the information recording / reproducing apparatus according to the present embodiment irradiates the spindle motor 3 for supporting and rotating the magneto-optical disc 1 and irradiating the magneto-optical disc 1 with laser light during recording and reproduction. An optical head 4 and a coil 5 for applying a magnetic field to the magneto-optical disk 1 during recording are provided. The optical head 4 and the coil 5 constitute recording means,
Recording of discrete information or continuous information is performed based on control by a controller 13 described later.

The present information recording / reproducing apparatus is configured to perform recording by a so-called magnetic field modulation method, and is capable of performing overwriting for recording new information on top of recorded information. The information recording / reproducing apparatus receives a recording / reproducing instruction from a higher-level device such as a so-called personal computer, or transmits characters / characters to / from a higher-level device.
It has a terminal 6 for inputting and outputting data such as image information, and an input terminal 22 for inputting an analog signal such as music information to be recorded from an external audio device or the like. The higher-level device issues commands such as recording and reproduction to the information recording / reproducing device.

For example, when recording music information, an analog signal input from an input terminal 22 is converted into digital data g by an A / D (analog / digital) converter 21 and sent to a switching circuit 19 for switching. The circuit 19 supplies the digital signal h to the recording signal processing circuit 7.

The switching circuit 19 includes an A / D converter 21
, The discrete digital data f from the interface 18, and the additional data e from the sector data generation circuit 20. When the controller 13 receives an instruction to record music information or record computer data from the host device via the terminal 6 and the interface 18, the controller 13 switches the switching circuit 1.
9 is switched.

The switching circuit 19 is configured to select one of the data e, f, and g based on the switching instruction, and to output it as digital data h to the recording signal processing circuit 7. I have.

The recording signal processing circuit 7 generates and adds an error detection / correction parity to the digital data h from the switching circuit 19 and adds the subcode information from the subcode generation circuit 17 to the EFM. The signal is modulated and further supplied with a frame synchronization signal to the coil driver 8.

The coil driver 8 drives the coil 5 based on the supplied signal. At the same time, the optical head 4 irradiates the magneto-optical disk 1 with laser light.
The signal is recorded. The signal format here can be, for example, the same as that shown in FIGS. 8 and 9 as a conventional example.

On the other hand, when recording discrete information such as character information, the discrete information input from the host device via the terminal 6 is supplied to the switching circuit 19 as digital data f via the interface 18, The digital data h to which the additional data e is appropriately added from the sector data generation circuit 20 is supplied to the recording signal processing circuit 7, and hereinafter,
The recording process is performed in the same procedure as described above.

The signal reproduced by the optical head 4 is amplified by a reproduction amplifier 10 and sent to a prerecorded information detection circuit 11 and a reproduction signal processing circuit 15. The prerecorded information detection circuit 11 is configured by, for example, a bandpass filter and a PLL, and generates a clock synchronized with the prerecorded information in the reproduction signal extracted by the bandpass filter by the PLL. . Then, a clock synchronized with the prerecorded information, which is a biphase mark modulation signal of an absolute address, is supplied to the CLV control circuit 9.

The CLV control circuit 9 compares the synchronization clock from the prerecorded information detection circuit 11 with a reference frequency stored therein, and controls the rotation of the spindle motor 3 based on the difference signal. Has become. Thereby, accurate CLV control is realized. The prerecorded information in the reproduced signal extracted by the prerecorded information detection circuit 11 is supplied to the address detection circuit 12.

The address detection circuit 12 comprises, for example, a biphase mark demodulation circuit and an address decoder.
After the bi-phase mark demodulation of the pre-recorded information extracted by the pre-recorded information detection circuit 11, the address information is decoded into position information on the disk by an address decoder, that is, the physical sector number (absolute address). Is supplied to the controller 13.

In the reproduction signal processing circuit 15, the reproduction amplifier 10
EFM from the magneto-optical signal component in the reproduction signal supplied from
Demodulation is performed, and further, error detection and correction processing using parity for error detection and correction is performed. When the reproduced signal data is music information or the like, the signal data is output as analog music information or the like to an external audio device or the like via a D / A (digital / analog) converter 23 and an output terminal 24.

The subcode information EFM-demodulated by the reproduction signal processing circuit 15 is supplied to a subcode detection circuit 16,
The subcode information recognized by the subcode detection circuit 16 is supplied to the controller 13. The controller 13
A recording / reproducing instruction is received from the host device via the terminal 6 and the interface 18.

The controller 13 receives the physical sector number from the address detection circuit 12 and recognizes the position of the optical head 4 on the magneto-optical disk 1, and the optical head 4 and the coil 5
Optical head 4 and coil 5 by a moving mechanism (not shown)
Has an access function to move the to a predetermined position.

Further, the controller 13 selects the subcode information supplied from the subcode detection circuit 16 and
The information related to the TOC content from the host device, which is stored in the OC memory 14 or provided via the interface 18, is stored in the TOC memory 14, and the content of the TOC memory 14 can be read. .

The sub-code information in the TOC memory 14 is supplied to a sub-code generation circuit 17 as needed, where a sub-code is generated.
It is FM-modulated and supplied to the coil driver 8. As a result, the subcode information in the TOC memory 14 is recorded in the TOC area 1a of the magneto-optical disk 1.

FIG. 1 is a schematic diagram showing an information arrangement when discrete information such as character information is recorded on the magneto-optical disk 1 by the information recording / reproducing apparatus of the present embodiment. The sector configuration of each block is shown.

As shown by I in FIG. 1, each block has B0,
Block numbers such as B1, B2,.
As shown in II in the figure, individual sectors in each block include:
"Minute": "second": "sector number within one second based on time (in this embodiment, 75 sectors are included in one second,
A physical sector number consisting of a combination of any of 0 to 74) "is assigned. The data dg of each block is 8
For example, a physical sector number (01:00:00) is assigned to the first sector of the block having the block number B0.
Is given.

When recording the discrete information, the controller 13 having a role as a calculating means responds to the recording command of the predetermined block number range given from the host device via the interface 18 so that the predetermined block number range is changed to the actual physical sector. An operation is performed to determine which value the number corresponds to. This will be described below with reference to the specific example of FIG.

For example, block numbers B1 to B1
When there is a recording instruction for the block B3, the number of sectors per block is "8", and the physical sector number at the head of the block with the block number B0 is (01:00:00) as described above. Is predetermined, the physical sector number at the head of the block with the block number B1 at which recording is started is (01: 00: 0)
0) + block number (1) × sector number (8) = (01:
00:08), and the head physical sector number of the block with the block number B1 can be easily obtained.

When the physical sector number of the block with the block number B1 is obtained in this way, an access operation to the block is executed. Then, with respect to the block of the block number B1 (see FIG. 3 (a)), the sector n ₁ piece provided by the data generating circuit 20, wherein the two front additional data d1 (same to be recorded on the front additional sectors FIG. (D)), additional data e (FIG. (B)) composed of n ₂ , in this case, two rear additional data d2 to be recorded in the rear additional sector, and an upper level given via the interface 18. Digital data f composed of divided data D1 (FIG. 10C) obtained by dividing discrete information da such as character information from the apparatus into four sectors corresponding to the effective sector dd is sequentially switched by the switching circuit 19. Desired information recording is performed.

The recording procedure of the block with the block number B1 will be described once. First, the physical sector number (0
1:00:08), the front additional data d1 to be recorded in two sectors from the sector is supplied from the sector data generation circuit 20, supplied to the recording signal processing circuit 7 via the switching circuit 19, and supplied to the magneto-optical disk 1. Is recorded in the information recording area 1b (period t1 in FIG. 3).

Subsequently, of the discrete information da provided from the host device via the interface 18, as divided data D1 corresponding to the size of the effective sector dd,
Four sectors are provided from the sector of (01:00:10), supplied to the recording signal processing circuit 7 via the switching circuit 19, and recorded (period t2).

Thereafter, the rear additional data d2 corresponding to two sectors from the sector of (01:00:14) is given by the sector data generation circuit 20, supplied to the recording signal processing circuit 7 via the switching circuit 19, and recorded. (Period t
3).

With the above operation, recording for one block is completed, and thereafter, blocks of block numbers B2 and B3 are successively recorded through the operations shown at t4 to t9.

In this way, if only the block number is specified from the host device such as a personal computer,
The information recording / reproducing apparatus side can record the discrete information da by adding the additional data e, and the recorded blocks can be independently rewritten in block units.

As for the area management of the recorded discrete information da, the higher-level device may allocate a predetermined block using the area management information itself as the discrete information, and record the data through the same operation as described above. Or controller 1
3 and the subcode generation circuit 17 via the TOC memory 14
After the conversion into a predetermined format, the data may be supplied to the recording signal processing circuit 7 for recording. In the case of the latter method, the TOC area 1a is usually used as a recording area for area management information.

Next, the recording operation of the continuous information db such as music information will be described with reference to the example of FIG. In FIG. 2, I indicates a block configuration, and II indicates a sector configuration. As described above, one block of data dg is composed of eight sectors. III indicates continuous information db to be recorded.

First, interface 1
In response to a recording command from the block of the designated block number given via the controller 8, the controller 13 performs an operation of converting the block into an actual physical sector number. This will be specifically described with reference to the example of FIG.

For example, the host device sends the physical sector number B5
When there is a recording instruction from the block 625, the number of sectors per block is "8", and the physical sector number of the first sector of the block of the block number B0 is (0).
1:00:00), the physical sector number of the first sector of the block with the block number B5625 at which recording is started is (01:00:
00) + block number (5625) × number of sectors (8) =
(01:00:00) + 45000 = (11: 00: 0)
0), and the physical sector number of the leading sector of the block with the block number B5625 can be easily obtained.

After performing a necessary access operation on the sector having the physical sector number obtained in this manner, music information and the like based on an analog signal from the input terminal 22 are converted into digital data g by the A / D converter 21. After that, the desired music information is supplied to the recording signal processing circuit 7 via the switching circuit 19 so that the desired music information starts after the physical sector number (11:00:00) corresponding to the head sector of the block with the block number B5625. Etc. are continuously recorded.

The end of recording of music information and the like is performed when an instruction of the end of recording is given to the controller 13 from the host device via the terminal 6 and the interface 18.
In the example shown in FIG.
It ends with 95 blocks.

The continuous information d recorded as described above
Regarding the area management of b, according to an instruction from a higher-level device,
After being converted into a predetermined format by the subcode generation circuit 17 via the controller 13 and the TOC memory 14 as area management information, the converted data is supplied to the recording signal processing circuit 7 and recorded. In this case, as the recording area of the area management information,
The TOC area 1a is used.

The discrete information d recorded as described above
For the reproduction of a or the continuous information db, conversion to a physical sector number similar to the above is performed by transmitting a reproduction command from a higher-level device and a block number of an area to be reproduced to the controller 13 via the interface 18. After
It is performed through necessary access operations.

When the reproduction information is the discrete information da,
1, the reproduction signal from the optical head 4 is amplified by the reproduction amplifier 10, and the reproduction signal processing circuit 15 performs EFM demodulation on the magneto-optical signal component in the reproduction signal. Error detection and correction processing using the parity for correction is performed.

In this error detection and correction operation, the front additional data d1 recorded in the front additional sector in FIG.
The reproduction process of the valid sector dd is also performed using the additional data e including the rear additional data d2 recorded in the rear additional sector. Then, among the reproduced signal data, divided data D of four sectors corresponding to the effective sector dd
.., D2...
Is output to a higher-level device via a.

When the reproduction information is continuous information db, the reproduction signal from the optical head 4 is reproduced by the reproduction amplifier 10 and the reproduction signal After the EFM demodulation is performed on the magneto-optical signal component and the error detection and correction processing using the parity for error detection and correction is performed, the analog music information is output to the outside via the D / A converter 23 and the output terminal 24. And so on.

As described above, in the information recording / reproducing apparatus using the incomplete interleaving, the rewritable recording of various pieces of discrete information da by the block designation and the recording / reproducing of continuous information db such as music information are performed. It is possible to provide an information recording / reproducing apparatus that can perform the information recording / reproducing.

When the discrete information da and the continuous information db are mixedly recorded on the same magneto-optical disk 1 in different formats, identification indicating whether each information is the discrete information da or the continuous information db. A code may be added to mix both at random, or a recording area for discrete information da and a recording area for continuous information db may be set separately in advance.

In the above embodiment, one block is composed of eight sectors. However, this is a numerical value used for convenience of description, and the block size can be variously changed as necessary.

The absolute address may be in any form such as a pit form as long as it is prerecorded and recognizable information.

Further, in the above embodiment, the disk-shaped recording medium of the magneto-optical system has been described. However, not only other rewritable recording media but also write-once recording media which can be recorded only once can be used. Applicable. Examples of the write-once recording medium include TeO _x , TeC, and organic dye films. Further, the shape of the recording medium is not limited to the form of the disk described in the above embodiment, and a tape-shaped or card-shaped recording medium can be implemented without departing from the spirit of the present invention.

[0075]

As described above, the information recording / reproducing apparatus according to the present invention has a front end for each of a predetermined number n of effective sector groups.
_The physical sector is based on the block number of the block on which recording or reproduction is performed in units of a block composed of (n + n ₁ + n ₂ ) sectors with one front dummy sector and n ₂ rear dummy sectors added to the rear. Calculating means for calculating a number; and when the information to be recorded is discrete information, the information is divided into n effective sector units, and front dummy information to be recorded in the front dummy sector for each information of each effective sector. And the rear dummy information to be recorded in the rear dummy sector are generated and added, and are recorded in the sector of the physical sector number obtained by the arithmetic means. On the other hand, when the information to be recorded is continuous information, the information is obtained by the arithmetic means. Recording means for continuously recording information in a sector having a physical sector number, wherein the recording means records information of discrete information.
Common non-completed
This is a configuration in which recording is performed by the moving method .

Thus, the higher-level device connected to the information recording / reproducing apparatus can perform the recording / reproduction without adding an additional sector necessary for recording / reproduction using the incomplete interleaving method. Only by specifying the block number, it becomes possible to cause the information recording / reproducing apparatus to record / reproduce discrete information such as characters and code data. In addition, the host device can issue a recording / reproducing instruction in block units, and there is no need to add and transfer data relating to the additional sector, and information management can be performed easily.

In particular, when the present invention is applied to a rewritable recording medium, partial recording of data recorded in the past can be performed by an instruction from a host device in units of blocks.

Further, according to the present information recording / reproducing apparatus, continuous information such as music information using the non-complete interleaving method can be mixed-recorded on the same recording medium as the discrete information. Recording and reproduction of a wide variety of information can be performed on the same recording medium, and various types of information can be recorded on one type of rewritable recording medium. Therefore, it is not necessary to use a different recording medium for each piece of recording information. This also has the effect of contributing to lowering the cost of the medium.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a relationship between a block number, a physical sector number, and recording information according to the present invention when discrete information is recorded.

FIG. 2 is an explanatory diagram showing a relationship between a block number, a physical sector number, and recorded information according to the present invention when continuous information is recorded.

FIG. 3 is a time chart showing a flow of information according to the present invention when recording discrete information.

FIG. 4 is a block diagram of the information recording / reproducing apparatus of the present invention.

FIG. 5 is a schematic plan view of the magneto-optical disk of the present invention.

FIG. 6 is an enlarged plan view of the magneto-optical disk of FIG.

FIG. 7 is a schematic plan view of a conventional compact disk.

FIG. 8 is a schematic diagram showing a frame signal format of a conventional compact disc.

FIG. 9 is a schematic diagram showing a sector format of a conventional compact disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magneto-optical disk (rewritable recording medium) 4 Optical head (recording means) 5 Coil (recording means) 13 Controller (arithmetic means) d1 Front additional data d2 Rear additional data

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Shigeo Terashima 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (56) References JP-A-63-285778 (JP, A) JP-A-64- 86371 (JP, A) JP-A-1-159874 (JP, A) JP-A-1-287872 (JP, A) JP-A-61-28224 (JP, A) (58) Fields investigated (Int. Cl. ^6, DB name) G11B 20/12 - 20/12 103 G11B 20/18 H03M 13/22

Claims (1)

(57) [Claims] 1. A recordable recording medium to which a physical sector number of a recording area is given by an address recorded in advance,
An information recording / reproducing apparatus for recording / reproducing information using an incomplete interleaving method, comprising: n ₁ front additional sectors at the front of each of a predetermined number n of effective sectors; and n ₂ rear at the rear. Calculating means for calculating a physical sector number based on a block number of a block on which recording or reproduction is performed, in units of a block composed of (n + n ₁ + n ₂ ) sectors to which an additional sector is added;
When the information to be recorded is discrete information, the information is referred to as n
The data is divided into effective sector units, and the front additional data to be recorded in the front additional sector and the rear additional data to be recorded in the rear additional sector are generated and added for each effective sector information, and are obtained by the arithmetic means. while recording the sector of the physical sector number which is provided with recording means for continuously recording information on a sector of the obtained physical sector number by the arithmetic means when the information to be recorded is continuous information, the recording hand
The columns indicate whether the information to be recorded is discrete information or continuous information.
In some cases, a common non-complete interleave
Information recording and reproducing apparatus, characterized in that the record.