JPH0991879A - Information recording and reproducing system and its method and information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the data-transfer speed performance of an information recording/reproducing system as a whole by recording with a priority the data requiring for a high-speed transfer in the area where the transfer speed is high, in an information recording medium with different data-transfer speed depending on the position where the data are recorded or reproduced. SOLUTION: When a recordable area 1 of an optical disk 100 is allocated to ROM area 10 and RAM area 20 and a program of a high use frequency such as an operating system, etc., is recorded in the ROM area 10, a substantial data-transfer velocity is improved for a whole optical disk 100 by arranging a ROM area 10 beforehand on the outer side of the disk where the data-transfer velocity is higher. Thus, when an application program has large capacity, and also even when the application program treats data of a high use frequency or a large volume, the information recording and reproducing system and its method and the information recording medium are obtained by which a good throughput can be obtained.

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 optically recording and reproducing information, and more particularly to a medium having a different data transfer speed depending on recording / reproducing positions.

[0002]

2. Description of the Related Art Disc-shaped information recording / reproducing media (hereinafter referred to as
In the conventional optical disk), the CLV (Constant) which performs recording / reproducing at a constant linear velocity has been used as a control of the disk rotation speed when recording / reproducing data.
Linear Velocity: CAV (Constant Angular Veloci), which records and plays at a constant rotational speed
ty: constant angular velocity) method is used. The CLV method controls the number of rotations of the optical disc so that the linear velocity is constant regardless of the radial position of the sector, so that the recording density can be constant regardless of the inner and outer positions of the optical disc, and the recording information amount It has the feature that However, since the rotation speed of the optical disk needs to be changed depending on the radial position of the sector, the seek speed is slow, and since the sector position does not become radial, the random access performance is deteriorated and the data transfer speed is slow. On the other hand, the CAV method can specify the sector position radially with respect to the center of rotation of the optical disk, and therefore has the advantages of excellent random accessibility and high data transfer rate. However, the recording density decreases in proportion to the increase in the radial position of the sector, that is, as the position approaches the outer circumference of the optical disc. Therefore, the amount of recorded information is smaller than that in the CLV method.

Generally, in a large-capacity optical disk for recording / reproducing data, recording / reproducing is often performed by the CAV method which is excellent in access performance, but recently as a method for compensating for the low recording density in the CAV method. , ZCAV (Zo
ne CAV) system has started to be adopted. CA in FIG.
FIG. 8B shows the sector arrangement of the V system and the sector arrangement of the ZCAV system. In FIG. 8, reference numeral 100 is an optical disk, 1 is an area in which data can be recorded and reproduced, and 2 is a center hole of the optical disk. Since the number of sectors per track is fixed in the CAV method shown in FIG.
There is a drawback that the recording density decreases toward the outer circumference of the optical disc. On the other hand, in the ZCAV system shown in FIG. 8B, the recordable area is divided into several zones in the radial direction of the optical disc, the number of sectors per track is increased toward the outer zone, and the zone from the inner to the outer zone is increased. By increasing the recording frequency stepwise, the recording density is improved. With such a sector arrangement, the ZCAV system is a system that has the features of the CAV system and the CLV system to some extent. Further, in the ZCAV method, since the rotation speed of the optical disk is constant regardless of the inner and outer circumference positions of the disk as in the CAV method, the data transfer speed on the outer peripheral side is faster than on the inner peripheral side of the disk. .

By the way, these optical discs are roughly classified into three types according to recording / reproducing characteristics: a reproduction-only disc, a rewritable disc, and a disc in which the two types of areas are mixed. Among optical discs, one of reproduction-only discs for reading prerecorded information is a CD-ROM (Compact Disc Read Only Memory) used as a memory for a computer. In these reproduction-only discs, for example, information signals are formed on the master disc as uneven pits according to a predetermined modulation rule, and since the product optical disc is duplicated based on this master disc, it has the same data. It is possible to manufacture a large number of optical discs at low cost.

On the other hand, as an example of an information recording / reproducing medium capable of additionally recording or rewriting an information signal, information is recorded as a phase change disk utilizing a change in state of a recording film or a magnetic pit due to a difference in magnetization direction. There is a magneto-optical disk. For example, in a magneto-optical disk, an information signal to be additionally recorded is recorded on a magneto-optical film made of an alloy of a transition metal and a rare earth metal as an example.

Under the present circumstances, these optical discs are used as a read-only disc for distributing programs and data, and as a write-once and rewritable disc for recording information by a user, according to each use. is there. However, it is not preferable not only in terms of maintenance and management of assets but also in terms of functions that the recorded read-only optical disc and the optical disc for additional recording and rewriting are separately used. Therefore, a recorded data area dedicated to reproduction (hereinafter referred to as a ROM area) and a recordable / reproducible area (hereinafter referred to as a RAM area) in which information recording can be newly added or rewritten.
There is an increasing demand for a convenient optical disk having a disk and a disk on one disk, and Japanese Patent Application Laid-Open No. 62-173630 discloses a disk configuration in which a ROM area and a RAM area are shared. ROM on such one optical disk
Also for an optical disc having a RAM area and a RAM area, it has been proposed to employ the ZCAV system having both a large capacity and a high speed access as described above.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In one optical disk having an M area and a RAM area, a read-only ROM area is provided in the inner peripheral portion and a RAM area for additional recording is provided in the outer peripheral portion. When the system records / reproduces information using this optical disc, it has to use a predetermined ROM area and RAM area, and it is difficult to use one optical disc properly according to the application of the application program. is there. In addition, since various data are increasing in capacity, it is particularly important to improve the throughput of the optical disc system.

In order to improve the throughput, the access time to the data accompanied by the movement of the optical pickup has been a problem in the past, but recently, as described above, for example, the ZCAV system is adopted to record in the optical disk.・
The difference in data transfer speed depending on the playback position has been highlighted. That is, since the throughput greatly depends on the data transfer rate, it is necessary to arrange the ROM area and the RAM area in consideration of the data transfer rate in order to improve the throughput. For example, ZC is used as a rotation control method for optical disks.
When the AV method is used, the data transfer rate at the outer peripheral position is larger than that at the inner peripheral position of the disc, and the data transfer rate differs depending on the radial position from the rotation center of the optical disc. Therefore, if the ROM area and the RAM area are fixedly arranged from the beginning, such as the ROM area on the inner circumference and the RAM area on the outer circumference, a problem occurs in the optical disc system. For example, a program that is frequently accessed during system operation is RO
In the case of the area M, the data reading speed is determined by the transfer speed on the inner circumference side, so that the outer circumference side of the disk having a high transfer speed cannot be used and the usability is poor.

In view of the above problems, the present invention arranges data and programs that can efficiently use the difference when the data transfer speed differs depending on the recording / reproducing position on the optical disk, and transfers the data as a whole of the optical disk. The purpose is to improve speed performance.

[0010]

[0011]

According to the present invention, when the data transfer rate is different depending on the position where the data is recorded / reproduced on one optical disk, the data for which the transfer rate is required is prioritized over the area having the high transfer rate. It is intended to be recorded.

In an optical disc in which a read-only ROM area and a write-once and rewritable RAM area are mixed, even if the data transfer speed differs depending on the place where data is recorded / reproduced, the difference in transfer speed ROM in consideration
The layout of the area and the RAM area is determined. At that time, in each of the ROM area and the RAM area, an area requiring a particularly high data transfer rate is recorded in an area having a high transfer rate.

Further, when the data transfer rate differs depending on the radial position from the center of rotation of the optical disk as in the ZCAV system, the data required for the data transfer rate is recorded on the outer peripheral side of the optical disk.

Furthermore, the ROM area and the RAM are considered in consideration of the use (read / write) frequency and size of the data recorded in the ROM area in advance and the data to be rewritten in the RAM area.
Determine the area layout and optimally utilize the difference in data transfer speed at the recording / playback position of the optical disk. Also, RA
Even in the optical disc having only the M area, the data transfer speed of the optical disc is substantially improved by exchanging the data in the RAM area based on the information on the frequency of use and size of the data.

[0015]

In an optical disc having a different data transfer rate depending on the position where data is recorded / reproduced, data that requires a high transfer rate is preferentially placed in an area having a high transfer rate, so that the data transfer of the entire optical disc can be performed. It can be done efficiently. Therefore, even if the application program has a large capacity or handles frequently used data, it is possible to obtain a good throughput in the optical disc system.

On an optical disc in which a read-only ROM area and a write-once, rewritable RAM area are mixed,
Even if the data transfer rate differs depending on the position where the data is recorded / reproduced, RO
The layout of the M area and the RAM area is determined.

As a result, it is possible to substantially improve the data transfer speed without increasing the rotation speed of the optical disk.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 8B is a diagram showing a sector arrangement in the optical disc when the ZCAV system is used for the recording format (control of the disc rotation speed). The data recording area is generally managed by dividing it into units called sectors, but in the ZCAV method, the recordable area is divided into several zones in the radial direction of the optical disc, and the number of sectors per track is increased toward the outer zone. The recording frequency is gradually increased from the inner circumference to the outer circumference. This system has a characteristic that the rotation speed of the optical disk is constant irrespective of the inner and outer peripheral positions of the disk, so that the data transfer speed on the outer peripheral side is higher than that on the inner peripheral side of the disk.

FIG. 1 is a diagram showing a first embodiment in which the present invention is applied to a magneto-optical disk using the ZCAV system.
A magneto-optical disk is a medium that can freely record and reproduce data, and a RAM that can be rewritten in the ROM area by providing a ROM area for reproduction only when the disk is manufactured.
It can be a disk that shares the area. In FIG. 1, reference numeral 100 is a magneto-optical disk, 1 is a data recording / reproducing area, and 2 is a center hole of the optical disk. In the recordable area 1, 10 is a ROM area, 20
Indicates a RAM area. The recording / reproducing area of the magneto-optical disk 100 is composed of n tracks (n is a natural number), and areas concentrically composed of a plurality of tracks are allocated to the ROM area 10 and the RAM area 20, respectively. In such a ROM / RAM mixed disc, when a frequently used program such as an operating system is recorded in the ROM area 10, as shown in FIG.
By providing the M region 10, it is possible to substantially improve the data transfer rate of the entire magneto-optical disk. In addition, for example, when recording / reproducing a moving image, the data transfer rate must be high. MPEG2 as an example
It is said that an average of 4 Mbit / sec and a peak data transfer rate of 7 Mbit / sec to 9 Mbit / sec is required to play back moving image data compressed with (Moving Picture Experts Group Phase2) with image quality equivalent to that of TV broadcasting. . A higher transfer rate is required to further improve the image quality. Moreover, it is expected that there will be more and more opportunities to handle very large file sizes, not limited to video data, but high transfer rates will be essential for recording and playing such huge amounts of data. . Therefore, when such data is recorded in the ROM area, the ROM area is provided on the outer peripheral side of the disc. This makes it possible to substantially improve the data transfer rate.

Further, in the case of a magneto-optical disk having a data transfer rate of about 8 Mbits / sec on the inner circumference and about 16 Mbits / sec on the outer circumference, recording of moving picture data compressed by the above-mentioned MPEG2 In reproduction, particularly when there is a large amount of information such as a scene in which the movement is vigorous, the transfer rate on the inner circumference side of the disc may be insufficient. In such a disc, moving image data may be recorded on the outer peripheral side of the disc having a high transfer speed, and voice or still image data may be recorded on the inner peripheral side. Although a disk having a data transfer rate of about 8 Mbit / sec at the inner circumference and about 16 Mbit / sec at the outer circumference has been described here, in the case of a disc having a higher transfer rate, for example, HDTV (High Definition Initio).
n Television, high-definition television) It is also possible to configure such that the image quality of the quality is recorded on the outer circumference side of the disc. That is,
In the ZCAV type magneto-optical disk, the data arrangement may be such that the recording area on the outer peripheral side having a high data transfer rate is effectively used.

The area structure of the magneto-optical disk is ROM
The area, the RAM area, or the ROM / RAM mixed area can be managed by having disk area information such as 110 shown in FIG.
The disk area information 110 is the area No. corresponding to each area. (K is a natural number), the start track of the area, the number of tracks (or the end track), attributes, and the like.

FIG. 3 shows a second embodiment in which the arrangement of the ROM area and the RAM area shown in the first embodiment is modified. As in FIG. 1, 100 is a magneto-optical disk, 10 is a ROM area, and 20 is a RAM area. Here, the second RAM area 21 is provided outside the ROM area indicated by 10. In the RAM area 21 on the outer peripheral side where the data transfer speed is high, as an example, data is frequently updated F
Recording / reproducing of a file management table such as AT (File Allocation Table). That is, in the present embodiment, when there is rewriting data that requires a high transfer rate, the RA that records and reproduces these data on the outer peripheral side is used.
This is a configuration that realizes more efficient data transfer by performing it in the M area.

By the way, the optical disk drive is generally constructed as an integrated system including a host computer for exchanging data. FIG. 9 shows an example of the system configuration. In FIG. 9, reference numeral 100 is an optical disk, and 91 is an optical disk drive that directly records / reproduces data on / from the optical disk. The operation of the optical disk drive 91 is controlled by the drive controller 92, and exchanges information in the system through the bus 93. The bus 93 is connected to a host computer 95 via a host adapter 94, and the drive controller 92 reads data from or writes data to the optical disc 100 in accordance with a read command or a write command from the host computer 95. Write. Further, other storage media are usually included in the system, for example, 96 is a hard disk, 97 is a drive controller for connecting the hard disk 96 and the bus 93, and the system is constructed by a configuration including all of these. .

FIG. 4 shows the above-mentioned system in the system.
It is a figure which shows the 3rd Example which applied this invention to the magneto-optical disc using the ZCAV system. In FIG. 4, 100 is a magneto-optical disk, 10 is a ROM area, and 20 is RA.
The M region is shown. In contrast to the embodiment shown in FIG. 1, FIG.
This is a configuration in which the M region 10 is provided on the inner peripheral side. Here, R
Information recorded in the OM area 10 is transferred to another medium having a high transfer rate, such as the hard disk 96 or the host.
It may be possible to move to a RAM area or the like in the computer 95 for use. For example, the host
This corresponds to the case where the data loaded in the RAM area in the computer is recorded in the ROM area of the magneto-optical disk. In such a case, the data transfer speed of the magneto-optical disk has an effect only when the information in the ROM area 10 is transferred to another medium, and thereafter, the ROM area 10 is affected.
The transfer speed of the information contained therein is determined by the transfer speed of the hard disk 96 or the like, and does not depend on the data transfer speed of the magneto-optical disk. Therefore, in the magneto-optical disk 100, a RAM area is provided in the area on the outer peripheral side where the transfer speed is high, and recording / reproduction of updated data is performed.
The data transfer rate of the magneto-optical disk can be substantially improved. In addition, the ROM area 10 of the magneto-optical disk
The data recorded on the
Even when the data is loaded into the area 20 and used, the data transfer rate performance of the entire magneto-optical disk can be improved by providing the ROM area in the inner peripheral portion of the magneto-optical disk as in FIG.

FIG. 5 shows an embodiment in which the ROM area of the magneto-optical disk in the embodiment shown in FIG. 4 is divided into an inner peripheral ROM area 10 and an outer peripheral ROM area 11.
The configuration shown in FIG. 5 is implemented when data for different purposes is recorded in the ROM area of the magneto-optical disk. That is, another medium having a high transfer speed, for example, the hard disk 96 shown in FIG. 9 or the RA in the host computer 95
There are two types of data in the ROM area: data that is used after being moved to the M area, and data that has different purposes, such as large capacity or data that requires a high transfer rate from the magneto-optical disk for frequent access during system operation. Corresponds to being recorded. In such a case, the ROM area is divided into two, the former data to be used by moving to another medium is used in the area 10 having a low transfer rate on the inner circumference side, and the area 11 having a high transfer rate on the outer circumference side is provided. By recording the latter data, the ROM area 11 having a high data transfer rate can be preferentially used during system operation. Although the ROM area is divided into two in this embodiment, the present invention is not limited to this, and the ROM area may be divided into a plurality of pieces according to the purpose of use of data. Further, the RAM area may be provided outside the ROM area as in the embodiment of FIG.

The structure in which the ROM area and the RAM area are provided in the radial direction of the magneto-optical disk has been described above. Next, the ROM area and the RAM are arranged in the tangential direction of the disk.
A configuration for providing the area will be described. FIG. 6 is a diagram showing a configuration in which a ROM area and a RAM area are mixed in the same track of the magneto-optical disk. In FIG.
The same functional parts as those are denoted by the same reference numerals, and the description thereof will be omitted unless particularly necessary. When the data recorded in the ROM area 10 and the data to be recorded / reproduced in the RAM area 21 are required simultaneously or alternately,
The structure shown in FIG. 6 is used. Thereby, the reproduction of the ROM area 10 and the recording / reproduction of the RAM area 21 can be performed while the light beam makes a round of the track, and the data can be efficiently processed. At this time, the data transfer rate of the magneto-optical disk can be substantially improved by arranging the data whose transfer rate is required on the outer peripheral side in each of the ROM area and the RAM area. The magneto-optical disk shown in FIG. 6 may have a structure in which the ROM area and the RAM area are repeated every one sector or every several sectors based on the data to be recorded.

As described above, the ROM area and the R
Although the embodiment in which the AM area and the AM area are mixed has been described, an embodiment of the magneto-optical disk in the case where the entire surface of the disk is the RAM area will be described next. FIG. 7A is a diagram showing an example of file management information when the present invention is applied to a magneto-optical disk whose entire surface is a RAM area. Figure 7
In (a), the file management information 120 includes, for example, a file name, file size, access count, attribute, and purpose of use. Here, for example, the drive controller 92 shown in FIG. 9 uses the file management information 120 recorded on the magneto-optical disk, and based on the usage frequency (access frequency) of each file (data) Swap the data arrangement in the RAM area of the disk. The data is exchanged by using, for example, a buffer. In this case, first, the usage status of the data moving destination in the magneto-optical disk is checked for the moving data, and if the moving destination is free, the data is moved as it is. If other data has already been written to the destination area, move the data to an empty area on the disk or temporarily to the data buffer of the drive, then add the desired data. Move. The above data replacement is performed by the drive controller, but the host computer performs the data replacement by utilizing the free area of another recording medium in the system. It is also possible. In this case, the data can be exchanged even if there is no free area for recording the data in the magneto-optical disk. At this time, frequently-used data is transferred to the outer circumference of the disc.
By moving the less frequently used data to the inner circumference side of the disk, the data transfer rate can be substantially improved.

The drive controller 92 can also exchange files depending on the file size, purpose of use, and the like. For example, when handling data having a very large file size such as moving image data, a high transfer rate at the time of recording / reproducing is indispensable, so this file is moved to the outer peripheral side of the disc. FIG. 7B is a diagram showing an example of the file management information 120 when the files are replaced based on the frequency of use. Here, the data that has been frequently accessed is preferentially moved to the outer peripheral side of the disk. FIG. 7C is a diagram showing an example of the file management information 120 when the files are exchanged based on the file size. Here, a file having a large size is preferentially moved to the outer peripheral side of the disk having a high data transfer rate.

Also in the ROM / RAM mixed disk, for example, in the embodiment shown in FIG.
If it is determined that a particularly high transfer rate is required for the data in 0, this data is transferred to the RAM on the outer peripheral side having a high transfer rate.
It is also possible to write in the area 20 and read the data from this RAM area.

In this embodiment, the drive shown in FIG.
Based on the file management information 120, the controller 92
Although the configuration for exchanging data has been mainly described, the present invention is not limited to this, and the host computer 95 shown in FIG. 9 may receive file management information from the magneto-optical disk and exchange data based on the file management information. Good. Also, the file management information is provided to the user, and the file (data
It is also possible to have a system configuration in which the initial placement or rearrangement of

In each of the above embodiments, the case where the medium is a magneto-optical disk has been described. However, the disk format is not limited to the conventional continuous groove method, but it is needless to say that the sample servo method can be applied. Further, the present invention may be applied not only to the magneto-optical disk but also to another medium such as a phase change optical disk. Further, in the present embodiment, the case where the ZCAV method is used as the rotation control method of the disk has been described, but the present invention is not limited to this, and recording / recording of the disk
Another medium having a different data transfer rate depending on the reproducing position may be used. Furthermore, although the arrangement of the ROM area and the RAM area has been described in the present embodiment, it is needless to say that the present invention is not limited to the above-mentioned embodiment and various other configurations can be adopted. In the present invention, the recording format of the medium is a read-only type,
It is possible to implement it regardless of the write-once type and the rewriting type.

[0033]

EFFECTS OF THE INVENTION In an optical disc having a different data transfer rate depending on the position where data is recorded / reproduced, data which requires a high transfer rate is preferentially placed in an area having a high transfer rate, whereby the data transfer of the entire optical disc is performed. Can be done efficiently. As a result, good throughput can be obtained in the optical disc system even when the application program has a large capacity, or when the application program handles frequently used data or large capacity data.

[0034]

[Brief description of drawings]

FIG. 1 is a diagram showing a ROM / RAM arrangement when the present invention is applied to a ZCAV type magneto-optical disk.

FIG. 2 is a diagram showing an example of management information for managing a ROM / RAM area of a magneto-optical disk.

FIG. 3 is a diagram showing another embodiment of a ROM / RAM arrangement when the present invention is applied to a ZCAV type magneto-optical disk.

FIG. 4 is a diagram showing another embodiment of the ROM / RAM arrangement when the present invention is applied to a ZCAV type magneto-optical disk.

FIG. 5 is a diagram showing another embodiment of the ROM / RAM arrangement when the present invention is applied to a ZCAV type magneto-optical disk.

FIG. 6 is a diagram showing another embodiment of the ROM / RAM arrangement when the present invention is applied to a ZCAV type magneto-optical disk.

FIG. 7 is a diagram showing an example of file management information when the present invention is applied to a ZCAV type magneto-optical disk.

FIG. 8 is a diagram showing sector arrangement of CAV system and sector arrangement of ZCAV system.

FIG. 9 is a diagram showing an example of a system configuration including an optical disc.

[Explanation of symbols]

1 ... Recordable area, 2 ... Center hole, 10, 11 ... RO
M area, 20, 21 ... RAM area, 100 ... Optical disk, 110 ... Disk area information, 120 ... File management information,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsukasa Hasegawa, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Hitachi, Ltd. multimedia system development headquarters (72) Inventor Makoto Ikushima Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa 292 Hitachi Ltd. Multimedia system development headquarters (72) Inventor Yukio Fukui Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa 292 Hitachi Ltd. multimedia system development headquarters (72) Inventor Hidefumi Goto Kanagawa 292 Yoshida-cho, Totsuka-ku, Yokohama-shi Hitachi, Ltd. Multimedia system development headquarters

Claims (11)

[Claims] 1. Data at the time of reproduction depending on the recording / reproducing position of data.
An information recording medium having different data transfer speeds, and an information recording / reproducing apparatus for recording / reproducing data on / from the information recording medium,
In an information recording / reproducing system including at least a host computer for exchanging data with the information recording / reproducing apparatus, file management information for managing files to be recorded / reproduced is recorded on the information recording medium. An information recording / reproducing system, comprising: means for changing the data arrangement on the information recording medium based on the file management information. 2. The information recording / reproducing system according to claim 1, wherein the means for exchanging the data arrangement moves the moving image data to a position where the data transfer speed on the information recording medium is relatively high. The information recording / reproducing system is characterized in that the arrangement of moving image data files on the information recording / reproducing medium is exchanged. 3. The information recording / reproducing system according to claim 1, wherein the file management information has at least file size information, and the means for exchanging the data arrangement determines a size based on the file management information. An information recording / reproducing system characterized in that the arrangement of files in the information recording / reproducing medium is changed so that a large file moves to a region having a relatively high data transfer speed. 4. The information recording / reproducing system according to claim 1, wherein the file management information has at least file usage frequency information, and the means for exchanging the data arrangement has a usage frequency based on the file management information. The information recording / reproducing system is characterized in that the arrangement of the files in the information recording / reproducing medium is switched so that a file having a high data transfer rate moves to an area having a relatively high data transfer speed. 5. The information recording / reproducing system according to claim 1, wherein the information recording medium has a recording format according to a zone CAV method. 6. A data upon reproduction depending on a recording / reproducing position of data.
An information recording / reproducing method for recording / reproducing data on / from an information recording medium having a different data transfer speed, wherein the information recording is performed based on file management information for managing files recorded / reproduced on the information recording medium. An information recording / reproducing method, characterized in that the data arrangement on a medium is replaced, a data file having a relatively large size is rearranged at a relatively high speed position on the information recording medium, and the data is reproduced. 7. A data upon reproduction depending on a recording / reproducing position of data.
In an information recording / reproducing method for recording / reproducing data to / from an information recording medium having a different data transfer speed, the frequency of use is determined based on the number of times a data file is accessed, and the information recording medium is determined based on the frequency of use. By replacing the above data arrangement, a data file having a relatively high frequency of use is rearranged at a position of a relatively high data transfer speed on the information recording medium to reproduce the data. Characteristic information recording / reproducing method. 8. The data at the time of reproduction depending on the recording / reproducing position of the data.
An information recording medium having a relatively different data transfer rate, the data on the information recording medium corresponding to the transfer rate required when reproducing the data to be recorded on the information recording medium.
An information recording medium characterized in that the data is recorded in the high transfer rate area in a high transfer rate area and a low transfer rate area with a data recording position as a boundary. 9. The information recording medium according to claim 8, wherein the data recorded in the high transfer rate area is MPEG2.
(Moving Picture Experts Group Phase 2) An information recording medium characterized by being moving image data compressed in conformity with the standard. 10. The information recording medium according to claim 8, wherein the information recording medium has a transfer rate width of approximately 8 to 16 Mbit / sec. 11. An information recording medium having a relatively different data transfer rate during reproduction depending on a recording / reproducing position of data, and data having a relatively large size at a position having a relatively high data transfer rate. An information recording medium characterized in that a file is recorded.