JPH04212760A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To record and reproduce dispersed information such as characters in a device just by specifying the block number of a block by using a specified physical sector number and recording specified information on the sector. CONSTITUTION:For example, in the case of specifying recording to the blocks whose block numbers are B1-B3 from a host device, the physical sector number(01:00:08) of the head of the block whose number is B1 is obtained first. Next, desired information recording is executed to the block whose number is B1 by switching additional data (e) consisting of data d1 giving by a sector data generation circuit 20 and recorded in n1, in this case, two front additional sectors and data d2 recorded in n2, in this case, two rear additional sectors and digital data (f) consisting of divided data D1 obtained by dividing the dispersed information from the host device which is given through an interface 18 by a switching circuit 19.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an information recording and reproducing apparatus for recording and reproducing external information on recordable recording media such as various types of rewritable optical discs using a so-called non-contained interleaving method. .

0002

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

FIGS. 8 and 9 are schematic diagrams for explaining the signal format used in CDs. 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.
The data field 31d is composed of 4-byte data and a parity code for error detection and correction.

[0004] The data in the data field 31d is determined by CIRC (Cross Interle), which will be described later.
Errors are detected and corrected using an error detection and correction method with non-conclusive interleaving called the aved Reed Solomon code.

As shown in FIG. 9, 98 frames (constituting one sector 32a (one subcoding frame))
The sub-codes 31c constitute one sub-coding block 32c, and this sub-coding block 32c
The track number (if the data is music information, it is called a song number), absolute address information on the disc, etc. are indicated. Note that the frame synchronization signal 32b and the data field 32d are respectively the frame synchronization signal 31 in FIG.
This shows a state in which 98 frames of data field b and data field 31d are assembled.

[0006] If the length of one sector 32a, that is, the sector length, is, for example, 13.3 [ms], 75 sectors equals one second. At this time, the sector number on the disk can be expressed by a combination of "minute": "second": "sector number within one second (i.e., any value from 0 to 74)" based on time. The sector numbers constitute continuous time information and position information that increase sequentially from the innermost circumference of the disk.

FIG. 7 is a schematic diagram showing the arrangement of areas on a CD. The disc 33 includes a main information recording area 33a that includes main information such as music information and sector numbers based on the subcodes, and additional information regarding each piece of main information recorded in the main information recording area 33a, such as track numbers and TOC (Table of Contents) in which the track recording start sector number etc.
ents) area 33b.

[0008] Due to the above format, in the CD player, when loading the disc 33, the TOC area 3
By reading the subcode information in 3b, the number of each piece of main information (equivalent to the number of songs in the case of music information) and the sector number of the recording start position are recognized, and the track is moved to the desired track in response to subsequent playback instructions. access to the TOC area 33
The subcode information read from b and the main information recording area 3
This is quickly executed by comparing the subcode recorded in 3a with the sector number.

The above-mentioned CD records at a constant linear velocity (CLV).
(Constant Linear Velocity
) ) method, the recording density is constant at any radial position on the disk 33, thereby making it possible to improve the recording capacity. In an actual CD player, during playback, the rotation of the disk 33 is controlled so that, for example, the interval between frame synchronization signals in the playback signal from a CD recorded in the above signal format becomes a reference length. CLV control is realized.

On the other hand, when recording various types of information such as music information or computer information on rewritable optical disks such as magneto-optical disks, which have been developed in recent years, conventional CDs or CD-ROMs (Compact DiskR
It is desirable to provide a compatible information recording and reproducing device by standardizing the reproducing method with the ead only memory).

[0011] In this case, in an optical disc on which information is not recorded, there is no frame synchronization signal that can be used for absolute address or CLV control using subcodes according to the CD signal format, so recording cannot be performed. It is not possible to access any previous sector position, and the CLV required for recording and playback cannot be performed.
Control becomes impossible.

[0012] Therefore, as an absolute address recording method that replaces the sub-code recording, after bi-phase mark modulation is performed on the absolute address, each bit is set to either "0" or "1".
It has been proposed to shift the guide groove of the optical disk to the inside or outside in the radial direction of the disk, or to change the width of the guide groove depending on the situation (Japanese Patent Application Laid-Open No. 1999-1-1999).
(See Publication No. 39632).

In that case, the frequency band of the absolute address by biphase mark modulation and the EFM (Eight t
o Fourteen Modulation) If the frequency band of the recorded information that has been modulated is made different,
It is possible to reproduce both of them separately from each other, and it is possible to access an area where there is no recorded information using the above-mentioned absolute address recorded by biasing the guide groove or the like.

Also, regarding CLV control, accurate speed control is possible by using the reproduced carrier component of the above-mentioned absolute address, and this CLV control can be performed even during recording.

[0015] The above-mentioned rewritable optical disc, which is compatible with CDs, is a form that can efficiently record a wide variety of information such as text information in addition to music information, especially as a home-use information recording medium. It is desirable to do so.

[0016]

[Problem to be Solved by the Invention] However, when attempting to rewrite information using the CD signal format, the information on the target physical sector location is not stored on the actual disc due to the non-contained interleaving method using CIRC. Since the data is distributed over multiple sectors, it becomes difficult to rewrite only the desired sector (for details, see Japanese Patent Laid-Open No. 1-55787).

[0017]Also, according to the CD format, all recorded information is continuous, but if part of the recorded data is rewritten, there will be differences between the previous and subsequent data near the recording start and end points of the rewritten data. Since the correlation between error corrections is lost, reproduction errors are more likely to occur.

[0018] In order to prevent this reproduction error, for example,
It is conceivable to provide additional sectors before and after the data to be actually recorded and reproduced in order to record dummy data including a parity code for correcting errors that may occur at the start or end of the data.

For example, in the case of CD format, CIR
In order to utilize C's original correction ability, the code propagation length using the non-complete interleaving method requires 105 frames, so for a sector consisting of 98 frames,
It is desirable to provide additional sectors of (105/98)≈1.07 sectors at the front and rear, that is, essentially 2 sectors at a time. Also, the additional sector at the front is the PL from the re-recording start point.
It is also useful as an L (Phase Locked Loop) pull-in area. However, when additional sectors are provided, the disk utilization efficiency decreases.

By the way, in order to minimize the decrease in disk usage efficiency due to the provision of additional sectors, the number of sectors constituting the minimum unit of information rewriting (hereinafter referred to as a block) per time should be increased. This brings us closer to the original usage efficiency of CDs. However, configuring blocks with a sufficiently large number of sectors for all types of information is not suitable for information applications with small amounts of data, such as character information, and there is also the problem that the recording time becomes unnecessarily long. .

[0021] Additionally, for higher-level devices (so-called personal computers, etc.) that manage various information, generally,
Like conventional floppy disks or hard disks, it is desirable to be able to record and reproduce in sector units or block units, but according to the above format, for example, two additional sectors are added before and after each sector each time recording is performed. Therefore, it is necessary to transfer the sector corresponding to the additional sector at the same time.

Furthermore, when performing an information rewriting operation, it is necessary to manage sectors that can be used as data areas and additional sectors that cannot be used, which makes the management extremely complicated.

[0023] For information such as digital music information, which has a large amount of information and a large number of sectors to be recorded at once,
Even if additional sectors are not provided, the effect will be minimal as the beginning and end of the information will be slightly interrupted, and in the case of music information, it will not cause much of a hindrance to hearing, but the number of sectors recorded at once for text information etc. will be small. In the case of a small number of sectors, it is generally necessary to provide additional sectors, which causes various problems as described above.

[0024]

[Means for Solving the Problems] In order to solve the above-mentioned problems, an information recording/reproducing apparatus according to the present invention provides a recordable recording medium in which a physical sector number of a recording area is given by an address recorded in advance. In an information recording and reproducing apparatus that records and reproduces information using a non-contained interleaving method, for each group of a predetermined number of n effective sectors, n1 front additional sectors (front dummy sectors) are placed at the front of the group, and n1 front additional sectors (front dummy sectors) are placed at the rear of the group. n2 rear additional sectors (rear dummy sectors) are added (n
+n1 +n2 ) sectors, and calculating a physical sector number based on the block number of the block to be recorded or reproduced;
When the information to be recorded is discrete information, the information is
The data is obtained by dividing the data into effective sector units and generating and adding front additional data to be recorded in the front additional sector and rear additional data to be recorded in the rear additional sector for each effective sector information. and a recording means for recording information continuously in the sector having the physical sector number obtained by the arithmetic means when the information to be recorded is continuous information. It is characterized by:

[0025]

[Operation] According to the above configuration, the host device (for example, a personal computer, etc.) connected to the information recording/reproducing device itself provides additional sectors necessary for recording/reproducing using the non-contained interleaving method. By simply specifying the block number of the block to be recorded or reproduced, it is possible to cause the information recording and reproducing apparatus to record and reproduce discrete information such as characters and code data.

[0026] Furthermore, the above-mentioned host device can issue recording/reproduction instructions by specifying addresses in block units, and there is no need to add and transfer data related to additional sectors, making it easy to manage information. be able to.

Furthermore, according to the present information recording and reproducing apparatus, continuous information such as music information recorded using the non-continuous interleaving method can be recorded in a mixed manner on the same recordable recording medium as the above-mentioned discrete information. Therefore, it becomes possible to record and reproduce a wide variety of information using one type of recordable recording medium.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 6.

As shown in FIG. 5, a magneto-optical disk 1 as a rewritable recording medium has a TOC on its inner edge.
An 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.

The information recording area 1b contains music information, etc.
While various types of information such as characters, images, and code data are recorded, the TOC area 1a also contains additional information regarding each piece of information recorded in the information recording area 1b, such as the starting block position and ending block position for each piece of information. etc. are now recorded.

As shown in FIG. 6, in the TOC area 1a and information recording area 1b of the magneto-optical disk 1, spiral guide grooves 2, 2... (shown by hatching for convenience) are formed in advance at predetermined intervals in the disk radial direction. are formed separately.

[0032]The absolute address on the disk is determined by whether each bit is "1" after biphase mark modulation.
The information is recorded by biasing the guide grooves 2, 2, etc. to the outside or inside of the magneto-optical disk 1 in the radial direction depending on whether the address is 0'' or not.The above absolute address represents the position on the disk. It is also used as rotation control information when performing CLV control, etc.The absolute address in this embodiment corresponds to each sector in the above CD format, so below, the absolute address will be referred to as the physical sector number. call.

In the block diagram of FIG. 4, the information recording and reproducing apparatus according to this embodiment includes a spindle motor 3 that supports and rotates the magneto-optical disk 1, and a spindle motor 3 that irradiates the magneto-optical disk 1 with laser light during recording and reproduction. It includes an optical head 4 and a coil 5 that applies a magnetic field to the magneto-optical disk 1 during recording. The optical head 4 and the coil 5 constitute a recording means,
Discrete information or continuous information is recorded based on control by a controller 13, which will be described later.

The present information recording and reproducing apparatus is configured to perform recording using a so-called magnetic field modulation method, and is also capable of overwriting, in which new information is recorded on top of already recorded information. The above-mentioned information recording/reproducing device receives recording/reproducing instructions from a higher-level device such as a personal computer, or exchanges characters and characters with a higher-level device.
It includes a terminal 6 for inputting and outputting data such as image information, and an input terminal 22 for inputting analog signals such as music information to be recorded from an external audio device or the like. Note that the host device issues recording, playback, etc. commands to the information recording/playback device.

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

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

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

In the recording signal processing circuit 7, parity for error detection and correction is generated and added to the digital data h from the switching circuit 19, and after subcode information from the subcode generation circuit 17 is added, the EFM The signal is modulated, a frame synchronization signal is added, and the signal is supplied to the coil driver 8.

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

On the other hand, when recording discrete information such as character information, the discrete information inputted from the host device through the terminal 6 is supplied to the switching circuit 19 as digital data f through the interface 18. The digital data h to which the additional data e from the sector data generation circuit 20 has been appropriately added is supplied to the recording signal processing circuit 7, and the following processing is performed.
Recording processing is performed using the same procedure as above.

The signal reproduced by the optical head 4 is amplified by a reproduction amplifier 10 and sent to a pre-recorded information detection circuit 11 and a reproduction signal processing circuit 15. The pre-recorded information detection circuit 11 includes, for example, a band-pass filter and a PLL, and the PLL generates a synchronized clock with respect to the pre-recorded information in the reproduced signal extracted by the band-pass filter. . Then, a clock synchronized with the pre-recorded information consisting of an absolute address bi-phase mark modulation signal is supplied to the CLV control circuit 9.

The CLV control circuit 9 compares the synchronized clock from the prerecorded information detection circuit 11 with an internally held reference frequency, and uses the difference signal to control the rotation of the spindle motor 3. It has become. This achieves accurate CLV control. Furthermore, the pre-recorded information in the reproduced signal extracted by the pre-recorded information detection circuit 11 is supplied to the address detection circuit 12.

The address detection circuit 12 includes, for example, a biphase mark demodulation circuit and an address decoder.
After the pre-recorded information detection circuit 11 performs bi-phase mark demodulation of the pre-recorded information extracted, the address decoder decodes it into position information on the disk, that is, a physical sector number (absolute address), and this physical sector number 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 reproduced signal supplied from
Demodulation is performed, and furthermore, error detection and correction processing using parity for error detection and correction is performed. If the reproduced signal data is music information or the like, it is output as analog music information or the like to an external audio device or the like via the D/A (digital/analog) converter 23 and the output terminal 24.

The subcode information EFM demodulated by the reproduced signal processing circuit 15 is supplied to the subcode detection circuit 16.
The subcode information recognized by the subcode detection circuit 16 is supplied to the controller 13. The controller 13 is
Recording/reproducing instructions are received from the host device via the terminal 6 and interface 18.

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

Furthermore, the controller 13 selects the subcode information supplied from the subcode detection circuit 16 and
It is possible to store in the OC memory 14 or to read out the contents of the TOC memory 14, such as storing information related to the TOC contents from the host device provided via the interface 18. .

Further, the subcode information in the TOC memory 14 is supplied to the subcode generation circuit 17 as necessary, where a subcode is generated and the recording signal processing circuit 7 outputs the E.
The signal 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 the 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 indicated by I in FIG. 1, each block has B0,
Block numbers such as B1, B2, etc. are assigned, and
As shown in II in the figure, each sector in each block has a sector number within one second (in this example, 75 sectors are included within one second) based on time. Therefore, a physical sector number consisting of a combination of "any value from 0 to 74)" is assigned. The data dg of each block is composed of 8 sectors. For example, the first sector of the block with block number B0 has a physical sector number (01:00:00
) is given.

When recording discrete information, the controller 13, which plays a role as a calculation means, responds to a recording command for a predetermined block number range given from a host device via the interface 18 to determine whether the predetermined block number range corresponds to an actual physical sector. Perform calculations to determine which value the number corresponds to. The explanation using the specific example of FIG. 1 is as follows.

For example, block numbers B1 to B1 from the host device
When there is a recording instruction for block B3, the number of sectors per block is "8", and as mentioned above, the first physical sector number of the block with block number B0 is (01:00:00). Therefore, the first physical sector number of the block with block number B1 at which recording starts is (01:00:0
0) + block number (1) x number of sectors (8) = (01:
00:08), and the first physical sector number of the block with block number B1 can be easily obtained.

[0053] Once the physical sector number of the block with block number B1 is determined in this manner, an access operation to the block is executed. Then, for the block with block number B1 (see FIG. 3(a)), front additional data d1 (see FIG. (d
)) and additional data e consisting of n2 pieces, in this case, rear additional data d2 to be recorded in two rear additional sectors.
((b) in the same figure) and divided data D1 ((c) in the same figure) obtained by dividing discrete information da such as character information from the host device via the interface 18 into four sectors of size corresponding to the effective sector dd. )) are sequentially switched by the switching circuit 19 to record desired information.

[0054] To explain once again the recording procedure for the block with block number B1 described above, first, the physical sector number (0
The front additional data d1 to be recorded in two sectors from the sector 1:00:08) is given by the sector data generation circuit 20, and is supplied to the recording signal processing circuit 7 via the switching circuit 19, and is then output to the magneto-optical disk 1. (period t1 in FIG. 3).

Continuously, among the discrete information da provided from the host device via the interface 18, divided data D1 corresponding to the size of the effective sector dd is divided into:
(01:00:10) is given for four sectors, and is 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 at (01:00:14) is given by the sector data generation circuit 20, and is supplied to the recording signal processing circuit 7 via the switching circuit 19 to be recorded. (period t3
).

[0057] With the above operations, recording for one block is completed, and thereafter blocks with block numbers B2 and B3 are successively recorded through the operations shown at t4 to t9.

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

Regarding the area management of the recorded discrete information da, the host device may allocate the area management information itself to a predetermined block as discrete information and record it through the same operation as described above. , or controller 1
3 and the subcode generation circuit 17 via the TOC memory 14.
After converting into a predetermined format, the signal may be supplied to the recording signal processing circuit 7 for recording. In the case of the latter method, the TOC area 1a is normally used as a recording area for area management information.

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

First, interface 1 is set up by the host device.
The controller 13 performs an operation to convert a recording command from a block with a designated block number given via the controller 8 into an actual physical sector number. A concrete explanation using the example of FIG. 2 is as follows.

For example, the physical sector number B5 is sent from the host device.
If there is a recording instruction from block 625, the number of sectors per block is "8", and the physical sector number of the first sector of the block number B0 is (0).
1:00:00), the physical sector number of the first sector of the block with block number B5625 where recording starts is (01:00:00).
00) + block number (5625) x number of sectors (8) =
(01:00:00)+45000=(11:00:0
0), and the physical sector number of the first sector of the block with block number B5625 can be easily obtained.

After performing the necessary access operation for the sector with the physical sector number obtained in this way, music information etc. in the form of an analog signal from the input terminal 22 is 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 is stored after the physical sector number (11:00:00) corresponding to the first sector of the block with block number B5625. etc. are recorded continuously.

[0064] The recording of music information, etc. is completed by giving an instruction to end the recording to the controller 13 from the host device via the terminal 6 and the interface 18. In the example of FIG. 2, recording of music information, etc. is in block number B68.
It ended with 95 blocks.

[0065] Note that the continuous information d recorded as described above
Regarding area management in b, based on instructions from the higher-level device,
The area management information is passed through the controller 13 and TOC memory 14, converted into a predetermined format by the subcode generation circuit 17, and then supplied to the recording signal processing circuit 7 for recording. In this case, as the recording area for area management information,
TOC area 1a is used.

Discrete information d recorded as above
To reproduce a or continuous information db, a reproduction command from the host device and the block number of the area to be reproduced are sent to the controller 13 via the interface 18, and the same conversion to the physical sector number as described above is performed. After
It is executed after necessary access operations.

[0067] When the reproduction information is discrete information da,
To explain using the example of FIG. 1, the reproduction signal from the optical head 4 is amplified by the reproduction amplifier 10, the reproduction signal processing circuit 15 performs EFM demodulation on the magneto-optical signal component in the reproduction signal, and furthermore, error detection is performed. Error detection and correction processing is performed using correction parity.

In the error detection and correction operation here, the front additional data d1 recorded in the front additional sector in FIG.
The reproduction process of the effective sector dd is also performed using the additional data e consisting of the rear additional data d2 recorded in the rear additional sector. Then, among the reproduced signal data, divided data D1 of 4 sectors corresponding to the valid sector dd
, D2, . . . are output to the host device via the interface 18 for each block.

Further, when the reproduced information is continuous information db, the reproduced signal from the optical head 4 is reproduced by the reproduced amplifier 10, and the reproduced signal in the reproduced signal EFM demodulation is performed on the magneto-optical signal component, and further error detection and correction processing is performed using parity for error detection and correction. etc. is output.

[0070] In this way, in the information recording/reproducing apparatus using non-conclusive interleaving, rewritable recording of various types of discrete information da by block designation and recording/reproduction of continuous information db such as music information are possible. It is possible to provide an information recording and reproducing device that can perform the following functions.

[0071] When recording discrete information da and continuous information db together in different formats on the same magneto-optical disk 1, an identification mark indicating whether each piece of information is discrete information da or continuous information db is used. They may be randomly mixed with a code, or the recording area for the discrete information da and the recording area for the continuous information db may be set separately in advance.

Further, in the above embodiment, one block is composed of eight sectors, but this is a numerical value used for convenience of explanation, and the block size can be changed in various ways as necessary.

Further, the absolute address may be in any form, such as a pit format, as long as it is pre-recorded and recognizable information.

Furthermore, although the above embodiment has been explained using a magneto-optical disk-shaped recording medium, it is applicable not only to other rewritable recording media but also to write-once recording media that can record only once. Applicable. Examples of write-once recording media include TeOX, TeC, and organic dye films. Further, the shape of the recording medium is not limited to the disk shape shown in the above embodiments, but tape-shaped or card-shaped recording media can be used without departing from the spirit of the present invention.

[0075]

Effects of the Invention As described above, the information recording and reproducing apparatus according to the present invention has n
The physical sector number is calculated based on the block number of the block to be recorded or reproduced, with a block consisting of (n+n1 +n2) sectors, each consisting of one front dummy sector and n2 rear dummy sectors added to the rear. and when the information to be recorded is discrete information, dividing the information into the n effective sector units,
Front dummy information to be recorded in the front dummy sector and rear dummy information to be recorded in the rear dummy sector are generated and added for each valid sector information, and are recorded in the sector with the physical sector number obtained by the calculation means. and a 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.

[0076] As a result, the host device connected to the present information recording/reproducing apparatus can record or reproduce blocks without providing additional sectors necessary for recording/reproducing using the non-contained interleaving method. By simply specifying a block number, it is possible to cause the information recording and reproducing apparatus to record and reproduce discrete information such as characters and code data. Further, the host device can issue recording/reproduction instructions in block units, and there is no need to add and transfer data related to additional sectors, making it possible to easily manage information.

Particularly, when the present invention is applied to a rewritable recording medium, previously recorded data can be partially rewritten by giving instructions block by block from the host device.

Furthermore, according to the present information recording and reproducing apparatus, continuous information such as music information using the non-continuous interleaving method can be mixedly recorded on the same recording medium as the above-mentioned discrete information. It has become possible to record and reproduce a wide variety of information on recording media, and since various types of information can be recorded on one type of rewritable recording medium, there is no need to use different recording media for each type of recorded information, and recording This also has the effect of contributing to lower prices of media.

[Brief explanation of the drawing]

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

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

FIG. 3 is a time chart showing the 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.

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

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

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

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

[Explanation of symbols]

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

Claims (1)

[Claims] Claim 1: A recordable recording medium in which a physical sector number of a recording area is given by a pre-recorded address,
In an information recording and reproducing apparatus that records and reproduces information using a non-contained interleaving method, for each group of a predetermined number of n effective sectors, n1 front additional sectors are placed in front of the group, and n1 additional sectors are added to the rear of the group.
Two rear additional sectors were added (n+n1 +n2
) sectors,
A calculation means that calculates a physical sector number based on the block number of the block to be recorded or reproduced, and when the information to be recorded is discrete information, the information is divided into the above-mentioned n effective sector units, and While generating and adding front additional data to be recorded in the front additional sector and rear additional data to be recorded in the rear additional sector for each piece of information, and recording them in the sector having the physical sector number obtained by the calculation means,
1. An information recording/reproducing apparatus comprising: a recording means for continuously recording information in a sector having a physical sector number obtained by the arithmetic means when the information to be recorded is continuous information.