JPH0785604A - Information recording medium, recording device and reproducing device using the medium - Google Patents

Abstract

PURPOSE:To record and reproduce information from both forward and reverse directions at least on one surface by providing first and second header areas for forward and backward direction reading respectively on the front and rear parts of a data area for every sector. CONSTITUTION:For example, in a second sector, formats A and B having data array reverse to the front and rear header areas Hf2 and Hr2 of a data area D2 are formed. The recording/reproducing of the area D2 from the forward direction F are conducted by the format of the area Hf2 and when they are conducted from a reverse direction R, the sector mark SM and the synchronizing pattern of the are Hr2 are recognized and necessary data reverse arraying is conducted. The data array of the reverse direction to be recorded on the area Hr2 is generated by reversely reading header information corresponding to the recording operation from a storage device. Further, it is possible that the rear header area of a just prior sector is provided between the areas Hf2 and Hr2 or the front header area of a just posterior sector is provided between the area D2 and Hr2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium of a format type which has forward and backward compatibility in the recording and reproducing directions, and a recording / reproducing apparatus therefor.

[0002]

2. Description of the Related Art Generally, as media used for recording and reproducing information data, there are mainly disc-shaped media and tape-shaped media. For the former disc-shaped information recording medium, the following two types of recording / reproducing apparatuses are known.

That is, one system is a system in which recording / reproduction is performed only on one side of the disk at a time. Since this device irradiates laser light to one side of the disc to record and reproduce information data, the recording and reproducing directions with respect to the tracks are the same on the front and back sides of the disc.

The other method is a method in which the recording / reproducing speed is improved by simultaneously performing recording / reproducing on both sides of the disk. Since this apparatus records and reproduces information data by irradiating both sides of the disc with laser light, the recording and reproducing directions with respect to the tracks are opposite between the front and back sides of the disc.

Further, since the latter one using the tape-shaped medium is recorded and reproduced by using a recording and reproducing device in a predetermined recording and reproducing direction, for example, the address of the area to be reproduced next is currently reproduced. If it is before the address of the position where the reproduction is performed, the tape is rewound to the address of the area to be reproduced next, and then the tape is advanced in the forward direction to perform the reproduction operation.

FIG. 10 shows an example of the format of a conventional information recording medium. In the figure, the recording / reproducing direction of control and information data is in the direction of arrow F, one sector consists of a header Hf and a data area Df, and the header area Hf corresponding to each data area Df is the data Df. It is provided in front of the area.

A format examples of the header area Hf and the data area Df are shown in A and B of FIG. In the format A, the header area Hf has a sector mark (SM), a variable frequency oscillator (VFO), an address mark (AM), and an identifier (ID) arranged in order.

[0008] SM is an area consisting of a special code pattern for detecting the beginning of a sector, and VFO is an area where a continuous repeating pattern signal for synchronizing with a reference clock at the time of recording / reproducing is recorded. Also, AM is
An area consisting of a special code pattern for detecting the synchronization position of the address code data recorded immediately after,
The ID is an area where address code data is recorded.

In FIG. 10, the VFO, AM, and ID are each singular, but in some cases, in order to ensure the recognition of the ID in the recording / reproducing apparatus during reproduction, the VF is used.
A media format having a plurality of O, AM and ID may be used.

The data area Df includes a variable free oscillator (VFO) for the data area, a sync byte (SB), information data (data), and a resync byte (RS).

VFO is an area provided for the data area Df in which signals of a continuous repeating pattern are recorded, and SB
Is an area consisting of a special code pattern for detecting the synchronization position of the head data string. The information data is an area in which a recording data string of several bytes is recorded, and the RS is an area including a special code pattern for resynchronizing the second and subsequent data.

VFO for the data area Df, SB, and
The RS is recorded together when the data is recorded, but since the manufacturer generally records the medium information such as the type of format and the recording / reproducing conditions in the recording medium in advance, the recording area and the special format are recorded at the time of the data recording. Only one may be provided. FIG. 10B shows this example, and format B
In the header area Hf, a synchronization pattern and an ID are sequentially provided.

As described above, there may be several kinds of different sector structures on the medium, but generally, each has a header area corresponding to the data area.

As described above, such a conventional medium format is configured to record or reproduce only in one direction, and the recording / reproducing apparatus reproduces in the same direction as the recorded direction and reproduces. The recording information data is transmitted to the outside in the order in which it is performed.

[0015]

However, in the format format of the sector structure as described above, since the recording / reproducing direction is only one direction at any time, for example, in the case of a disk-shaped medium, both sides are simultaneously recorded or There is a difference between the format format of the medium to be mounted on the reproducing apparatus and the format format of the medium to be mounted on the apparatus for recording or reproducing only one side at a time.

That is, since another type of dedicated medium must be used, there is no compatibility between the mediums used in both devices, and it is not possible to divert data between the devices.

In the case of a tape-shaped medium, if the address of the area to be reproduced next is before the address of the position currently being reproduced, after rewinding to the address at the tip of the area to be reproduced next. Since it has to be reproduced, it takes time, and the defect of poor accessibility becomes more remarkable.

Therefore, the present invention provides an information recording medium of a format type capable of recording and reproducing from both forward and reverse directions, and an apparatus suitable for recording or reproducing such an information recording medium. The purpose is to provide.

[0019]

[Means for Solving the Problems] To achieve the above object,
According to the present invention of claim 1, an information recording track formatted in a sector structure is provided, and one sector includes a data area for information data and a header area for control data including address information of the data area. In the information recording medium, in the sector, in a predetermined recording / reproducing direction, a first header area for forward reading corresponding to the data area is provided in front of the data area, and the data area is provided behind the data area. And a second header area for backward reading corresponding to the above.

According to the invention of claim 2, the invention according to claim 1
In the information recording medium described in (3), the first header area is adjacent to the front of the data area and the second header area is adjacent to the rear of the data area in the recording / reproducing direction.

Further, in the invention of claim 3, in the information recording medium according to claim 1, the control data of the first header area and the information data of the data area are forward data with respect to the recording / reproducing direction. The data is recorded in an array, and the control data in the second header area is recorded in a data array in the reverse direction with respect to the recording / reproducing direction.

According to the invention of claim 4, the invention according to claim 1
In the information recording medium described in 1), the second header area of the first sector and the first header area of the second sector are adjacent to each other between two first and second sectors which are sequentially adjacent in the recording / reproducing direction. Is.

According to a fifth aspect of the present invention, in the information recording medium according to the fourth aspect, the control data of the second header area of the first sector and the first header area of the second sector are adjacent to each other. It is a part of shared.

Further, in the invention of claim 6, in the information recording medium according to claim 1, the information data is recorded in a forward direction in a plurality of byte areas in the data area in the recording / reproducing direction. In order to control the synchronization of the information data of each byte area, the first synchronization control data of the forward data array and the second synchronization control data of the reverse data array are recorded between the byte areas, respectively. In the front of the front byte area, reference clock control data for synchronous control of the data area and sync position control data of the frontmost byte area are recorded in this order in a forward data array, and the last byte is recorded. In the rear of the area, the same sync position control data and reference clock control data are recorded in the reverse order data array in this order.

According to the invention of claim 7, an information recording track formatted in a sector structure is provided, and a header area for control data including a data area for information data and address information of the data area in one sector. A first sector and a second sector are provided in the sector, and information data is recorded in the first sector in a forward data array with respect to a predetermined recording / reproducing direction. One data area and a first header area for forward reading corresponding to the first data area are formed in front of the first data area in the recording / reproducing direction, and the recording / reproducing area is formed in the second sector. A second data area in which the same information data is recorded in a data array in the reverse direction with respect to the direction, and in front of and behind the second data area with respect to the recording / reproducing direction. The data area is obtained by forming a second header region for reverse reading corresponding.

Further, in the invention of claim 8, in the information recording medium according to claim 7, the first data area and the second data area are aligned with each other with the same byte length apart from each other in the track crossing direction. Formed as a closed region.

According to a ninth aspect of the present invention, in the information recording medium according to the seventh aspect, the second data area is formed adjacently behind the first data area in the recording / reproducing direction. .

The invention of claim 10 is the same as claim 1
<6> A recording device for recording data on the information recording medium according to any one of <1> to <6>, wherein the device stores the control data recorded in the forward direction in the first header area with respect to the recording and reproducing direction. Storage means for storing,
The recording means reads out the control data stored in the storage means in a reverse direction data array and records the control data in the second header area at the time of recording in the forward direction.

Further, the invention of claim 11 provides a reproducing apparatus for reproducing the data recorded on the information recording medium according to any one of claims 1 to 6, and the apparatus comprises the recording device. Storage means for storing the information data read from the data area during reproduction in the reverse direction with respect to the reproduction direction, and reverse reading means for reading and outputting the information data stored in the storage means in a forward data array. I have it.

[0030]

In the information recording medium according to the present invention, the sector has a first header area for forward reading corresponding to the data area in front of the data area in a predetermined recording / reproducing direction. Since the second header area for backward reading corresponding to the data area is provided behind the data area, the first header area corresponds to the data area when recording / reproducing is performed in the forward direction. It is used as a header area, and when recording / reproducing is performed in the reverse direction, the second header area is used as a header area corresponding to the data area.

That is, in the disk medium, the format of the disk medium in which the recording and reproducing directions are equal to the tracks on both the front and back sides is set so that recording and reproducing can be performed on at least one side from both the forward direction and the reverse direction, and the recording and reproducing apparatus is provided with the medium. If the recording / playback function is applied to both sides, recording and playback will be performed from the inner circumference to the outer circumference on one surface and from the outer circumference to the inner circumference on the other surface, so that double-sided simultaneous recording and playback on a double-sided recording / playback device is possible. Recording and reproduction becomes possible.

Further, in a disk medium used in a recording / reproducing apparatus capable of simultaneous recording / reproducing on both sides, a recording / reproducing direction in which the recording / reproducing direction with respect to a track is opposite on the front surface and the back surface is recorded and reproduced from at least one surface in both the forward and reverse directions. If the recording / playback device has a recording / playback function for the medium, it is possible to perform recording / playback from the inner circumference to the outer circumference on one surface and recording / playback from the outer circumference to the inner circumference on the other surface. Recording / reproducing can be performed even by a recording / reproducing apparatus that records / reproduces only one side at a time.

Further, in the tape medium and its recording / reproducing apparatus, if recording / reproducing is possible from both the forward direction and the reverse direction, when recording / reproducing the area where the tape must be rewound, the recording / reproducing speed is set in the rewinding direction. By performing recording / reproduction while the tape is reversely fed, the time required to complete the operation is shortened.

According to the second aspect of the invention, in the recording / reproducing direction, the first header area is adjacent to the front of the data area, and the second header area is adjacent to the rear of the data area. For example, in a tape-shaped medium, even if the address of the area to be recorded / reproduced next is the area just recorded / reproduced at present, it is possible to immediately perform re-recording / reproduction by feeding the tape in the opposite direction.
Accessibility is improved when recording / reproducing of the same sector is repeated.

According to the invention of claim 3, the control data of the first header area and the information data of the data area are recorded in a forward data array in the recording / reproducing direction, and the control data of the second header area is recorded. Since the control data is recorded in the data array in the reverse direction with respect to the recording / reproducing direction, the control data can be treated as the forward data even during the recording / reproducing in the reverse direction.

According to the fourth aspect of the invention, the second header area of the first sector is adjacent to the first header area of the second sector between the first and second sectors which are sequentially adjacent in the recording / reproducing direction. In this case, in particular, according to the invention of claim 5, a part of the control data of each other in the adjacent area of the second header area of the first sector and the first header area of the second sector. Since it is shared, it is possible to reduce the unnecessary code as much as possible,
The data storage area can be expanded by effectively utilizing the track length on the information medium.

Further, in the invention of claim 6, the information data in the sector is recorded in the forward direction in a plurality of byte areas in the data area with respect to the recording / reproducing direction, and the information of each byte area is recorded. For synchronization control of data, the first synchronization control data recorded in the forward data array and the second synchronization control data recorded in the reverse data array are recorded between each byte area. There is.

Therefore, even when recording / reproducing in the reverse direction, these synchronization control data can be treated as the forward data, and the load of the forward / reverse conversion with the data array on the recording / reproducing apparatus side can be reduced.

Further, in front of the frontmost byte area in the data, reference clock control data for synchronizing control of the data area and sync position control data of the frontmost byte area are arranged in this order in the forward direction. Recorded in a data array,
The same sync position control data and reference clock control data are recorded in the data array in the reverse direction in this order behind the last byte area, which also reduces the data conversion processing on the recording / reproducing apparatus side. Contribute.

With the above format,
Since the data can also be read in both the forward and reverse directions with respect to the recording / reproducing direction, the time required to complete the operation can be shortened and the first synchronization control data recorded in the forward data array between the byte areas. Since it can be shared with the second synchronization control data recorded in the data array in the opposite direction, it is possible to minimize useless codes and effectively use the tracks on the information medium to transfer the data. An information recording medium having an expanded storage area can be obtained. At the time of reverse recording / reproduction, information data forming a reverse data array can be dealt with by storing in a memory in the recording / reproducing apparatus and its reverse reading operation.

Further, in the information recording medium according to the invention of claim 7, the sector includes a first sector and a second sector,
In the first sector, information data is recorded in a forward data array with respect to a predetermined recording / reproducing direction.
A data area and a first header area for forward reading corresponding to the first data area are formed in front of the first data area with respect to the recording / reproducing direction, and the second sector has the recording / reproducing direction. A second data area in which the same information data is recorded in a reverse data array, and a second header area for reverse reading corresponding to the data area is formed behind the second data area in the recording / reproducing direction. Has been done.

In this case, according to the invention of claim 8, the first data area and the second data area are formed as mutually aligned areas which have the same byte length and are separated from each other in the track crossing direction. When an error occurs during the recording / reproducing operation, it is possible to perform the recording / reproducing operation of the same information again on the second data simply by moving the head in the track crossing direction and performing the recording / reproducing operation of the reverse data array. Becomes

Further, according to the invention of claim 9, the second data is provided after the first data area in the recording / reproducing direction.
The data areas are adjacent. With such a format, it is not necessary to move the head in the track crossing direction, and the recording / reproducing operation can be continued while maintaining the tracking on the same track.

Further, the recording apparatus according to the invention of claim 10 is for performing data recording of a reverse data array in the recording / reproducing direction, and recording in the forward direction in the first header area in the recording / reproducing direction. Storage means for storing the control data to be stored, and recording means for reading the control data stored in the storage means at the time of recording in the forward direction in a data array in the reverse direction and recording it in the second header area. ing.

Therefore, information data input from the outside is read in the forward direction with respect to the recording / reproducing direction in front of the data area and in the backward direction after the data area. It is possible to perform the operation of recording as a sector format provided with the second header area during sending in one recording / reproducing direction.

Further, the reproducing apparatus according to the invention of claim 11 is used for reproducing a medium having data recorded in a reverse data array in the recording / reproducing direction, and reproducing in the reverse direction in the recording / reproducing direction. A storage unit for storing the information data that is sometimes read from the data area and a reverse reading unit for reading the information data stored in the storage unit in a forward data array and outputting the data are provided.

Therefore, since the information data once read from the medium is stored in the storage means, the information data is rearranged in a predetermined order and then sent to the outside. Therefore, even when the information data is reproduced from the reverse direction, The data order of the output information data does not change.

[0048]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the information recording medium of the present invention is shown in FIG.
Shown in. FIG. 1 shows an example of the present invention when it corresponds to the conventional example shown in FIG. With respect to the recording / reproducing direction, if the forward direction is an arrow F and the reverse direction is an arrow R, one sector is a front header area Hf, a rear header area Hr, and a data area D.
It consists of and.

Here, taking the data area D2 as an example, in the format shown by the symbol A in FIG.
In Hf2, the data is configured in the order of SM, VFO, AM, and ID, and in the rear header area Hr2, the reverse data array I is used.
It is configured in the order of D, AM, VFO, and SM. When the recording / reproducing apparatus records / reproduces the data area D2 from the reverse direction R, the SM of the rear header area Hr2 is recognized on the apparatus side and the necessary data reverse arrangement operation is performed.

In the format shown by the symbol B in the figure, the front header area Hf2 is composed of the synchronization pattern and the ID in this order, and the rear header area Hr2 is composed of the reverse data array in the order of the ID and the synchronization pattern. ing. When the recording / reproducing apparatus records / reproduces the data area D2 from the reverse direction R, it recognizes the synchronization pattern of the rear header area Hr2 and performs the necessary data reverse arrangement operation.

The second embodiment is shown in FIG. In this case, the back header area Hr3 of the immediately preceding sector is interposed between the data area D2 and its front header area Hf2, and the front header area Hf3 of the immediately following sector is placed between the data area D2 and the back header area Hr2. Is intervening. The data arrays in the header at this time are shown as formats A and B.

A third embodiment is shown in FIG. This is
In the SM of the rear header area Hr2 of the data area D2
And the SM of the front header area Hf2 of the data area D3 are adjacent to each other, this SM is a format format shared by both sectors. This also applies to the format B example.

Further, FIG. 4 shows the data area D2 in FIG.
Since the ID of the rear header area Hr2 of the above and the ID of the front header area Hf3 of the data area D3 are adjacent to each other, this ID is shared by both headers. Of course,
This can also be applied to the format B example.

Here, FIG. 5 shows a fifth embodiment, in which the same data is recorded in a reverse direction data array for a track having a sector structure composed of a header and an information data area in which data is recorded in a forward direction array. The tracks are arranged in a symmetrical sector structure on another track. In this case, the data areas of the same data (for example, Df2 and Dr2) are aligned with the same byte length, and the front header area Hf2 is provided in front of the data area Df2 with respect to the forward direction F at a position separated in the track crossing direction. The backward header area Hr2 is provided in the reverse data array at the rear position with respect to the forward direction F of the data area Dr2 in the reverse array.

FIG. 6 shows a data area Df in which the data area D2 in the information recording medium of FIG. 1 is arranged in the forward direction F.
In this example, 2 and a data area Dr2 in which data is arranged in the reverse direction R immediately after that are provided adjacent to each other. Forward F
When recording and playing back, the front header area Hf2 and data area Df2
Is used, the rear header area Hr2 and the data area Dr2 are used at the time of recording / reproducing in the reverse direction R, and in both cases, they are treated as a forward data array in the medium feeding direction.

7 and 8 show examples of data arrays in the data area. In the data area in one sector, a plurality of 1-byte areas Di1 to Din are provided for information data. FIG. 7 shows, in front of the frontmost byte area Di1 in the data area, VFO which is reference clock control data for synchronous control of the data area and SB which is synchronous position control data of the frontmost byte area Di1. Is recorded in the forward direction data array in this order, and the last byte area Din
The same sync position control data SB and the reference clock control data VFO are recorded in the rear of the same in this order in the reverse data array.

Further, between each byte area divided into a certain number of bytes, RS, which is control data for resynchronization, is arranged in a forward data array in front of and behind each data. The regions Rf1 to Rfn-1 and the reverse data array regions Rr2 to Rrn are provided. Further, FIG. 8 is an example in which the RS provided between the byte areas in FIG. 7 is shared.

FIG. 9 is an explanatory diagram regarding the processing of the example of the information recording / reproducing apparatus when the recording direction and the reproducing direction are opposite to each other on the information recording medium. Here, data 0 to 8 indicate unit data to be transmitted to the outside, and in this example, each is 1 byte. Further, in this case, each sector of the information recording medium is capable of recording information data having a length of 3 bytes.

In FIG. 9, data 0 to data 5 are recorded in consecutive sectors S1 and S2,
Data 6 to data 8 are recorded in sector S5, which is located 3 sectors behind it.

In this case, in the recording / reproducing apparatus, the sector S5
The reading is started from the rear of, and the read data 8 to data 6 are temporarily stored in the memory which is the internal storage means,
Next, the sectors S2 and S1 are sequentially read from the rear,
Data 5 to data 0 are stacked on the memory. After the reading operation is completed, the reproduction operation is completed when the data 0 in the memory is read out one byte at a time in the forward direction and transmitted to the outside, and the transmission up to the data 8 is completed.

FIG. 11 shows a block diagram of this information recording / reproducing apparatus. When recording information, the information data is taken from the input terminal 18 into the input amplifier 16 and temporarily recorded in the storage device 10. Here, the header information recorded in the front header area 2 in each sector of the information recording medium 2 is separately recorded in the rear header area in the backward data array, and the generation of the backward data array is performed, for example. , As the recording operation progresses, the corresponding header information is read backward from the storage device 10.

The data from the storage device 10 is converted into an analog signal by the D / A converter 14 and recorded on the information recording medium 2 by the optical head device 6 via the recording amplifier 12. A series of these processes is controlled by the controller 8.

When reproducing information, the information data recorded on the information recording medium 2 is read by the optical head device 6, the read information data is A / D converted through the reproducing amplifier 22, and the storage device is stored. Stored in 10. When the information data stored in the storage device 10 is the reverse data array, the control device 8 performs the reverse reading operation based on the header information, and outputs it to the terminal 28 via the output amplifier 26. Even during reproduction, the series of processes are controlled by the control device 8.

[0064]

As described above, according to the information recording medium of the present invention, information data can be recorded / reproduced regardless of the recording / reproducing direction. This allows for disk media,
Information can be taken in and out regardless of the track rotation direction, and medium compatibility can be obtained between a device that simultaneously records and reproduces data on both sides and a device that records and reproduces data on only one surface, and information data can be used.

Further, even in the case of a tape medium, it becomes possible to perform reproduction while feeding the tape backward in the rewinding direction, shortening the time until the operation is completed, improving the accessibility, and improving the track on the tape. Can be effectively used to expand the data storage area.

Further, in the present invention, it is possible to obtain an information recording / reproducing apparatus capable of recording / reproducing information on / from an information recording medium in a format capable of recording / reproducing information in the forward / reverse direction, and the information data once read at the time of reproduction can be obtained. Is stored in the storage means, rearranged in a predetermined order, and then sent to the outside, so that even if the information data is read from the reverse direction, the order of the information data does not change and the correct information data is reproduced. Is possible.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a format according to a first embodiment of an information recording medium of the present invention.

FIG. 2 is an explanatory diagram showing a format according to a second embodiment of the information recording medium of the present invention.

FIG. 3 is an explanatory diagram showing a format according to an example in which adjacent SMs are shared in the information recording medium of the present invention.

FIG. 4 is an explanatory diagram showing a format according to an example in which adjacent IDs are shared in the information recording medium of the present invention.

FIG. 5 is an explanatory diagram showing a format according to a fifth embodiment of the information recording medium of the present invention.

FIG. 6 is an explanatory diagram showing an example of another format of the information recording medium of the present invention.

FIG. 7 is an explanatory diagram showing an example of a format of a data area of the information recording medium of the present invention.

FIG. 8 is an explanatory diagram showing another example of the format of the data area of the information recording medium of the present invention.

FIG. 9 is an explanatory diagram related to processing of an example of the information recording / reproducing apparatus when the recording direction and the reproducing direction are opposite to each other on the information recording medium.

FIG. 10 is an explanatory diagram showing an example of a format of a conventional information recording medium.

FIG. 11 is a block diagram of an information recording / reproducing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

2 ... Information recording medium 6 ... Optical head device 8 ... Control device 10 ... Memory device 12 ... Recording amplifier 14 ... D / A converter 16 ... ・ Input amplifier 18 ・ ・ ・ ・ Input terminal 22 ・ ・ ・ ・ ・ ・ Reproducing amplifier 24 ・ ・ ・ ・ A / D converter 26 ・ ・ ・ ・ Output amplifier 28 ・ ・ ・ ・ ・ ・ Output terminal F ・ ・ ・ ・・ Forward direction R ・ ・ ・ Reverse direction S1, S2, S3 ・ ・ Sectors D1, D2, D3, D4, D5 ・ ・ ・ Data areas Hf1, Hf2, Hf3, Hf4, Hf5 ・ ・... Front header area Hr1, Hr2, Hr3, Hr4, Hr5 ... Rear header area

Claims (11)

[Claims] 1. An information recording medium having an information recording track formatted in a sector structure, and including in one sector a data area for information data and a header area for control data including address information of the data area. In the predetermined recording / reproducing direction, the sector corresponds to a first header area for forward reading corresponding to the data area in front of the data area and to the data area behind the data area. An information recording medium comprising a second header area for reverse reading. 2. The first header area is adjacent to the front of the data area and the second header area is adjacent to the rear of the data area with respect to the recording / reproducing direction. The information recording medium described in. 3. The control data of the first header area and the information data of the data area are recorded in a data array in the forward direction with respect to the recording / reproducing direction, and the control data of the second header area with respect to the recording / reproducing direction. The information recording medium according to claim 1, wherein the information recording medium is recorded in a reverse data array. 4. The second sector of the first sector between two first and second sectors which are adjacent in order with respect to the recording / reproducing direction.
The information recording medium according to claim 1, wherein the header area is adjacent to the first header area of the second sector. 5. The control data is partly shared between adjacent areas of the second header area of the first sector and the first header area of the second sector. Information recording medium described. 6. Regarding the recording / reproducing direction, information data is recorded in a forward direction in a plurality of divided byte areas in the data area, and information is recorded between the byte areas for synchronous control of the information data in each byte area. The first sync control data recorded in the forward data array and the second sync control data recorded in the reverse data array are respectively recorded in the front, and the synchronization of the data area is performed in front of the frontmost byte area. The reference clock control data for control and the synchronous position control data of the frontmost byte area are recorded in a forward data array in this order, and the same synchronous position control data and reference clock are recorded behind the last byte area. The information recording medium according to claim 1, wherein the control data and the control data are recorded in this order in a reverse data array. 7. An information recording medium having an information recording track formatted in a sector structure, and including in one sector a data area for information data and a header area for control data including address information of the data area. In the sector, the sector includes a first sector and a second sector, and the first sector has a first data area in which information data is recorded in a forward data array with respect to a predetermined recording / reproducing direction, and A first header area for forward reading corresponding to the first data area is formed in front of the first data area in the recording / reproducing direction, and the second sector includes
A second data area in which the same information data is recorded in a reverse data array with respect to the recording / reproducing direction, and a second header for backward reading corresponding to the data area behind the second data area in the recording / reproducing direction. An information recording medium having an area formed therein. 8. The information according to claim 7, wherein the first data area and the second data area are formed as mutually aligned areas having the same byte length and separated from each other in the track crossing direction. recoding media. 9. The information recording medium according to claim 7, wherein the second data area is formed adjacent to the first data area in the recording / reproducing direction. 10. A recording apparatus for recording data on the information recording medium according to claim 1, wherein the control is recorded in a forward direction in the first header area with respect to the recording / reproducing direction. A storage unit for storing data; and a recording unit for reading the control data stored in the storage unit in a reverse direction data array and recording the data in the second header area at the time of recording in the forward direction. Recording device. 11. A reproducing device for reproducing the data recorded on the information recording medium according to claim 1, wherein the reproducing device reads from the data area at the time of reproducing in the reverse direction with respect to the recording / reproducing direction. A reproducing apparatus comprising: storage means for storing the information data; and reverse reading means for reading and outputting the information data stored in the storage means in a forward data array.