JPH10214454A - Data transfer device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transfer device capable of transferring the data between hard disks each other at a high speed with simple and inexpensive constitution. SOLUTION: When an AV signal is transferred to a hard disk drive 100 from an external device 3 reproducing the hard disk, the AV signal is outputted to the hard disk drive 100 after temporarily stored in a buffer memory 7. At this time, the stores state (d) of the buffer memory 7 is monitored by a buffer memory monitor 6, then the data amount capable of being stored is obtained and outputted to a system controller 1. By the system controller 1, in accordance with the data amount capable of being stored, the recording/reproducing speed (a) outputted to the external device 3 is adjusted so as not to exceed the maximum reproducing speed (h) from the external device 3, for keeping the data amount capable of being stored of the buffer memory 7 to be constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer apparatus and a data transfer method capable of transferring data at high speed between a first recording medium and a non-linearly accessible second recording medium such as a hard disk drive. About.

[0002]

2. Description of the Related Art In recent years, for example, a hard disk drive (HDD), which is a non-linear access recording medium, has become widespread as a recording medium for recording, for example, an AV (Audio Visual) signal, instead of a magnetic tape.

[0003] This is because a hard disk drive can be accessed at a high speed and can transfer data at a high speed. By the way, in high-speed reproduction of a shuttle or the like, data is reproduced step by step, and the data transfer amount is the same as in the case of 1 × -speed reproduction. On the other hand, the high-speed transfer is a function of transferring the same data at the high speed as at the time of the 1 × speed reproduction. In the case of the 2 × speed transfer, twice the data is transferred per unit time as compared with the 1 × speed. Here, in this high-speed transfer, it is important that data copy can be performed at high speed.

However, the access speed of a hard disk drive differs depending on the recording position. In addition, a hard disk drive has a recoverable error in which recorded data can be read by accessing the same location a plurality of times during reproduction, or a recovery error in which recorded data cannot be read even after a predetermined number of accesses. Unacceptable errors may occur. Further, the transmission time of the reproduction data may fluctuate due to the rotation waiting time, temperature compensation, and the like.

Therefore, conventionally, for example, when transferring AV data between hard disk drives, the data transfer speed is set so that fluctuations in the data transfer speed of the hard disk drive can be appropriately absorbed by a buffer memory having a finite storage capacity. Set to the lowest expected transfer rate. That is, since the buffer memory absorbs the fluctuation of the transfer speed temporarily according to the storage capacity of the buffer memory, the transfer speed to the hard disk drive is set lower than the performance so that the buffer memory does not fail. Must be set.

[0006]

However, as described above, in the prior art, the data transfer speed between the hard disk drives is set to be lower than the data transfer speed of the hard disk drive. It is necessary to use a hard disk drive capable of realizing a transfer speed higher than the desired transfer speed in order to obtain the above, which causes a problem that the device becomes complicated and expensive. A similar problem occurs when data is transferred between a magnetic tape and a hard disk drive.

The present invention has been made in view of the above-mentioned prior art, and enables data transfer to a hard disk drive, for example, between hard disk drives or between a magnetic tape and a hard disk drive, with high speed, at a low cost, and with a simple configuration. It is an object of the present invention to provide a data transfer device and a method thereof, and a data input / output control device and a method thereof.

[0008]

In order to solve the above-mentioned problems of the prior art and achieve the above-mentioned object, a data transfer apparatus of the present invention comprises a second recording medium capable of nonlinearly accessing a first recording medium. A data transfer device for transferring data to and from a recording medium, wherein at least one of data reproduced from the first recording medium or data reproduced from the second recording medium is temporarily stored. Temporary storage means for storing, storage state monitoring means for monitoring the storage state of the temporary storage means, and data indicating a storage state input from the storage state monitoring means and data reproduced from the first recording medium Alternatively, it has a transfer speed control means for controlling a transfer speed of at least one of data reproduced from the second recording medium.

A data transfer method according to the present invention is a data transfer method for transferring data between a first recording medium and a non-linearly accessible second recording medium, wherein the data is transferred from the first recording medium. A first step of temporarily storing at least one of the reproduced data and the data reproduced from the second recording medium in a temporary storage unit, and storing the data stored in the first step A second step of monitoring the state, and, based on the storage state of the temporary storage means monitored in the second step, the data reproduced from the first recording medium and the second storage medium. A third step of controlling a transfer rate of at least one of the reproduced data.

Further, the data input / output control device of the present invention
A data input for controlling input / output of a temporary storage means for temporarily storing at least one of data reproduced from the first recording medium and data reproduced from the non-linearly accessible second recording medium. An output control device, wherein a storage state monitoring means for monitoring a storage state of the temporary storage means, and a signal indicating a storage state are input from the storage state monitoring means, and the temporary storage is performed based on the signal indicating the storage state. Data input / output control means for controlling input / output of at least one of data reproduced from the first recording medium and data reproduced from the second storage medium, which is input / output to / from a storage means.

Further, the data input / output control method of the present invention comprises:
Data input / output control for controlling input / output of temporary storage means for temporarily storing at least one of data reproduced from the first recording medium and data reproduced from the non-linearly accessible second recording medium A first step of monitoring a storage state of the temporary storage means, and a step of inputting / outputting the temporary storage means according to a storage state of the temporary storage means in the first step. A second step of controlling input / output of at least one of data reproduced from the first recording medium and data reproduced from the second recording medium.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a data transfer device according to an embodiment of the present invention will be described. FIG. 1 shows a configuration diagram of a data transfer apparatus 11 according to the present embodiment, in particular. As shown in FIG. 1, the data transfer device 11 includes a system controller 1 and a CPU (Central Pr).
processing unit) 2, a format converter 4, a buffer memory controller 5, a buffer memory monitor 6, a buffer memory 7, and a recording medium controller 9. In FIG. 1, a data transfer device 11 is connected to a recording medium 10 capable of non-linear access to an external device 3, and the data transfer device 11 is connected between the external device 3 and the non-linear accessible recording medium 10 by a data transfer device. 1
1 is being transferred. For example, VT
If there is a non-linearly accessible recording medium in R, one VTR can be configured with the data transfer device 11 and the non-linearly accessible recording medium 10. FIG. 2 shows a case where the non-linearly accessible recording medium 10 is a hard disk 100 and the recording medium controller 9 is a SCSI controller 90.

The external device 3 is, for example, a hard disk (not shown), is connected to the system controller 1, and receives a transfer instruction speed signal a from the system controller 1. At the transfer instruction speed indicated by the transfer instruction speed signal a, the external device 3 reproduces data stored in, for example, a hard disk constituting the external device 3 so that the data is transferred. Further, the external device 3 determines the maximum reproducible speed according to the reproduction state, and outputs the maximum reproduction speed h to the system controller 1.

Further, the system controller 1 controls the CP
The transfer instruction speed a is also output to U2. This is because data reproduced from a non-linearly accessible recording medium, which will be described later, is transferred to the buffer memory 7 via the buffer memory 7.
When the data is output to the external device 3 from the buffer memory 7, the data is transmitted from the buffer memory 7 to the format converter 4 at the transfer speed indicated by the transfer instruction speed signal a. Is output to the external device 3 via the.

The buffer memory controller 5 generates a read control signal e for the buffer memory 7 in response to a control signal from the CPU 2 and outputs the read control signal e to the buffer memory 7. When data is output from the data transfer device 11 to the external device 3 as described above, the data is output based on the transfer instruction speed signal a from the system controller 1 described above.
A control signal is output from the PU 2 to the buffer memory controller 5, and a read control signal e is generated by the buffer memory controller 5 in accordance with the control signal and output to the buffer memory 7. The buffer memory 7 reads the data recorded in the buffer memory 7 based on the read control signal e from the buffer memory controller 5 and, when recording the data on the non-linearly accessible recording medium 10, stores the read data in the recording medium. When the data is output to the controller 9 and reproduced from the recording medium 10, the read data is output to the format converter 4. The buffer memory 7 outputs a storage status signal d indicating the storage status d1 of the buffer memory 7 to a buffer memory monitor 6 described later.

The buffer memory monitor 6 monitors an unstored area of data in the buffer memory 7 based on the storage status signal d from the buffer memory 7 and sends a control signal indicating the amount of data that can be stored in the buffer memory 7 to the CPU 2. Output to

The system controller 1 continuously determines whether or not the amount of storable data exceeds a predetermined threshold based on the amount of storable data in the buffer memory 7 obtained via the CPU 2. Monitor. That is, the system controller 1 compares a predetermined threshold value stored in, for example, a RAM or the like (not shown) with the amount of data storable in the buffer memory 7 obtained via the CPU 2 and determines that the data amount is equal to the predetermined threshold value. (Threshold value)
Is continuously monitored to see if it exceeds. When the system controller 1 determines that the amount of storable data exceeds the threshold, the amount of storable data in the buffer memory 7 has increased, and thus data recording control on the recordable recording medium 10, that is, external device In the case of controlling the recording transfer speed of the data from the external device 3, the transfer instruction speed a to be output to the external device 3 is incremented (increased) so as to increase the transfer speed of the data output from the external device 3.

When the system controller 1 determines that the storable data amount is lower than the threshold value, it outputs from the external device 3 because the storable data amount in the buffer memory 7 is small. The transfer instruction speed a to be output to the external device 3 is decremented (decreased) so as to reduce the data transfer speed. Similarly, in the case of data reproduction control in which data reproduced from the non-linearly accessible recording medium 10 is transferred from the buffer memory 7 to the external device 3, that is, in the case of data reproduction transfer speed control to the external device 3, the system controller 1 When it is determined that the threshold value is exceeded, the transfer instruction speed a output to the CPU 2 is incremented. When it is determined that the threshold value is lower than the threshold value, the transfer instruction speed a output to the CPU 2 is decremented. Note that the system controller 1 determines the maximum playback speed h input from the external device 3.
Is determined so as not to exceed.

The format converter 4 can record data transferred from the external device 3 on a non-linearly accessible recording medium, and convert data from the non-linearly accessible recording medium into a format that can be transferred to the external device 3. Convert the format of the data to. In the example shown in FIG. 2, the format converter 4 is divided into a DlSK format converter 40 and a DISK format reconstructor 80.

The DISK format converter 40 in FIG. 2 converts an AV signal S3, which is data transferred from the external device 3, into a disk format for recording on a hard disk 100, which is a non-linearly accessible recording medium 10. Specifically, A of 4096 bytes
The AV signal S3 is data-packed so that the V signal S3 is stored in one sector in the hard disk 100.

The DISK format decompressor 80 in FIG. 2 can transfer the AV signal S7a from the buffer memory 7 that has been data-packed in the DISK format to the external device 3 or to the external device 3. To do so, the restored AV signal S8 is output to the external device 3.

The recording medium controller 9 in FIG. 1 controls data communication between the buffer memory 7 and the non-linearly accessible recording medium 10 connected to the data transfer device 11. When the recording medium 10 is the hard disk 100 as shown in FIG.
Becomes the SCSI controller 90. In this case, communication control of the AV signal between the buffer memory 7 and the hard disk 100 is performed.

The operation of the data transfer apparatus when data is transferred from the external device 3 to the non-linearly accessible recording medium 10 will be described below with reference to FIG. Here, the hard disk 100 shown in FIG. 2 is used as the non-linearly accessible recording medium 10 in FIG.
The description will be made using the DISK format converter 40 and the DISK format reconstructor 80 shown in FIG. 2 as the format converter 4 in FIG. However, the DISK format decompressor 80 is not necessary for transferring data from the external device 3 to the eight recording media 10 that can be accessed in a non-linear manner.

As shown in FIG. 3, the data transfer device 11
The transfer instruction speed signal a indicating the transfer instruction speed is output from the system controller 1 to the external device 3 connected via an interface such as RS422. The external device 3 outputs data to the DISK format converter 4 of the data transfer device 11 at the transfer instruction speed indicated by the transfer instruction speed signal a. Further, the external device 3 outputs the maximum playback speed h to the system controller 1. This is because the system controller 1 determines the transfer instruction speed so as not to exceed the maximum reproduction speed h input from the external device 3 as described above. Even if the system controller 1 outputs to the external device 3 a transfer instruction speed exceeding the reproduction speed capability of reproducing data from the external device 3, data reproduction corresponding to the transfer instruction speed cannot be performed from the external device 3. is there.

A in FIG. 3 output from the external device 3
The V signal S3 is input to the DISK format converter 40, and is input to the DISK format converter 40 so as to match the recording format of the hard disk 100 as the non-linear access recording medium 10.
Converted to SK format. The AV signal S4 converted into the DISK format is output to the buffer memory 7.

The AV signal S stored in the buffer memory 7
4 is an SC signal as an AV signal S7 in a predetermined order, for example, in an input order, according to a control signal e from the buffer memory controller 5.
Output to SI controller 90. At this time, as shown in FIG.
Memory 7 relating to and data non-storage area 21
The storage status d1 is monitored, and a storage status signal d indicating the storage status d1 is output from the buffer memory 7 to the buffer memory monitor 6. From the buffer memory monitor 6, a data amount signal c that can be stored in the buffer memory 7 is output to the system controller 1 via the CPU (as a data amount signal b) based on the storage state signal d.
Then, as shown in FIG. 5, the system controller 1 compares the storable data amount c1 with a predetermined threshold value. If the storable data amount c1 is larger than the threshold value, the maximum reproduction speed h The transfer instruction speed a is incremented within a range not exceeding. This means that the data reproduction speed of the external device 3 is
This is a case where the recording speed is slower than the recording speed at 00.

On the other hand, if the result of the comparison by the system controller 1 indicates that the predetermined threshold value is larger than the storable data amount c1, the transfer instruction speed is decremented. This is a case where the data reproduction speed in the external device 3 is higher than the recording speed in the hard disk 100.

When the storable data amount c1 is equal to the threshold value, the transfer instruction speed may not be changed.

A read control signal f is output from the CPU 2 to the buffer memory controller 5, and the buffer memory controller 5
Outputs the read control command e to the buffer memory 7 based on the read control signal f, and the buffer memory 7 reads the AV signal S4 stored in the buffer memory 7 based on the read control command e, Output. The AV signal S7 input to the SCSI controller 9 is
Writing is actually performed on the hard disk 100 by a write command g1 from the CPU 2. Also, SCS
The I controller 9 issues a write end command to the CPU when the writing of the AV signal S7 to the hard disk 100 ends.
Output to 2. The CPU 2 grasps the writing status of the AV signal S7 from the SCSI controller 9 to the hard disk 100.

Next, the operation of the data transfer apparatus when data is transferred from the non-linearly accessible recording medium 10 to the external device 3 will be described with reference to FIG. Here, the hard disk 100 shown in FIG. 2 is used as the non-linearly accessible recording medium 10 in FIG.
The description will be made using the DISK format converter 40 and the DISK format reconstructor 80 shown in FIG. 2 as the format converter 4 in FIG. However,
The DISK format converter 40 is not required for transferring data from the non-linearly accessible recording medium 10 to the external device 3, and therefore the description thereof is omitted here.

As shown in FIG. 6, the AV signal S10 recorded on the hard disk 100 is stored in the buffer memory 7 as the AV signal S9 via the SCSI controller 90. Then, the AV signal S stored in the buffer memory 7
9 is a read control signal e from the buffer memory controller 5
And a DISK format decoder 80
Is output as an AV signal S7.

At this time, the storage state d1 of the buffer memory 7 with respect to the data storage area 20 and the data non-storage area 21 as shown in FIG.
Is monitored, and a storage status signal d indicating the storage status d1 of the buffer memory 7 is output from the buffer memory 7 to the buffer memory monitor 6. From the buffer memory monitor 6, a storable data amount signal c indicating the storable data amount c 1 of the buffer memory 7 based on the storage status signal d
It is output to the system controller 1 via U2 (as a storable data amount signal b). Then, as shown in FIG. 8, in the system controller 1, if the storable data amount c1 is larger than a predetermined threshold value, the transfer speed instruction signal a output from the system controller 1 to the external device 3 is decremented. . This is a case where the processing speed of the external device 3 for recording the AV signal S8 by 8 or the like is higher than the reproduction speed of the hard disk 100.

On the other hand, if the result of the comparison by the system controller 1 indicates that the predetermined threshold value is larger than the storable data amount c1, the transfer instruction speed signal a indicating that the rotational speed instruction speed is to be incremented is output to the external device. Output to 3. This is because the processing speed of recording the AV signal S8 on the recording medium in the external device 3 is higher than that of the hard disk 10.
This is a case where the reproduction speed is slower than the reproduction speed of 0. When the storable data amount is equal to the threshold value, the speed instruction speed may not be changed.

The AV signal S7 output from the buffer memory 7 is converted by the DISK format reconstructor 80 from the recording format of the hard disk 100 to the external device 3
Device 3 after being restored to a format that can be transferred to
And the external device 3 performs processing such as recording on a predetermined recording medium, for example, a hard disk (not shown).

As described above, according to the data transfer device 11 of the present invention, the transfer speed of the external device 3 is adjusted according to the storage state of the buffer memory 7, so that the transfer speed to the non-linear access recording medium 10 The data can be transferred to the non-linear access recording medium 10 by utilizing the maximum capacity of the maximum read / write speed of the recording medium 10 capable of non-linear access. As a result, data transfer between the external device 3 and the non-linearly accessible recording medium 10 can be performed at high speed, and can be performed with an inexpensive and simple configuration.

In FIGS. 2 and 3, the hard disk 100 is used as the non-linearly accessible recording medium shown in FIG.
However, it is also possible to use a magnetic disk, a magneto-optical disk, a DVD, or the like, and any medium can be used as long as it is a non-linearly accessible recording medium. The system controller 1, the buffer memory controller 5, and the buffer memory monitor 6 monitor the buffer memory 7 and control the transfer rate. For example, a single controller controls the system controller 1, the buffer memory controller 5, It is also possible to perform the above-described function of the buffer memory monitor 6 instead.

Further, according to a plurality of threshold values,
It is also possible to obtain the storable data amount of the buffer memory 7. At that time, when the storable data amount exceeds the first threshold value, the transfer speed is incremented or decremented, and the storable data amount becomes the second. The transfer rate is decremented or incremented when the threshold value is exceeded, and the transfer rate is changed when the storable data amount is between the first threshold value and the second threshold value. May not be performed. In addition to the management of the storage state of the buffer memory 7, various management methods are possible without departing from the technical idea of the present invention.

[0038]

As described above, according to the data transfer apparatus and method and the data input / output control apparatus and method of the present invention, the recording and reproducing apparatus for a non-linearly accessible recording medium such as a hard disk can be used to the maximum. It can be operated at transfer speed. As a result, data transfer between the non-linear access recording media and between the non-linear access recording medium and the linear access recording medium can be performed at high speed with a low-cost and simple configuration.

[Brief description of the drawings]

FIG. 1 is a configuration diagram when a data transfer device according to an embodiment of the present invention is connected between an external device and a non-linearly accessible recording medium.

FIG. 2 is a configuration diagram of a data transfer device according to an embodiment of the present invention when the non-linearly accessible recording medium shown in FIG. 1 is a hard disk.

FIG. 3 is a block diagram of the data transfer device shown in FIG. 2;
FIG. 4 is a diagram for explaining an operation when an AV signal is transferred from an external device to a hard disk drive.

FIG. 4 is a diagram for explaining a storage state of a buffer memory in the case shown in FIG. 3;

FIG. 5 is a flowchart for explaining processing in the system controller shown in FIG. 3;

FIG. 6 is a block diagram of the data transfer device shown in FIG. 2;
FIG. 4 is a diagram for explaining an operation when an AV signal is transferred from a hard disk drive to an external device.

FIG. 7 is a diagram for explaining a storage state of a buffer memory in the case shown in FIG. 6;

FIG. 8 is a flowchart for explaining processing in the system controller shown in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... System controller, 2 ... CPU, 3 ... External equipment, 4 ... DISK format converter, 5 ... Buffer memory controller, 6 ... Buffer memory monitor, 7 ... Buffer memory, 9 ... Recording medium controller, 10 ... Non-linear Accessible recording medium, 11 data transfer device, 40 DI
SK format converter, 80: DISK format restorer, 90: SCSI controller, 100: Hard disk

Claims (28)

[Claims] 1. A data transfer device for transferring data between a first recording medium and a second recording medium capable of non-linear access, comprising: data reproduced from the first recording medium and the second recording medium. Temporary storage means for temporarily storing at least one of the data reproduced from the medium; storage state monitoring means for monitoring the storage state of the temporary storage means; and a signal indicating the storage state from the storage state monitoring means. And a transfer rate control means for controlling a transfer rate of at least one of data reproduced from the first recording medium and data reproduced from the second recording medium. 2. The storage state monitoring means monitors the storage state of the temporary storage means, and outputs a storage-capable data amount signal indicating the storage-capable data amount of the temporary storage means. Controlling a transfer rate of at least one of data reproduced from the first recording medium and data reproduced from the second recording medium based on the storable data amount signal from the storage state monitoring means. The data transfer device according to claim 1. 3. The transfer rate control means, when the data is transferred from the first recording medium to the second recording medium, determines that the storable data amount indicated by the storable data amount signal is a predetermined reference value. 2. The data transfer device according to claim 1, wherein when the value is larger than the value, the transfer speed of data reproduced from the first recording medium is increased. 4. A method for reproducing data from the first recording medium,
Further comprising processing means for transferring the reproduced data, wherein the transfer rate control means sets the storable data amount to a predetermined reference when the data is transferred from the processing means to the second recording medium. When the value is larger than the value, a transfer rate control signal for controlling the processing means so as to increase the transfer rate of data reproduced from the first recording medium is output to the processing means. 4. The data transfer device according to claim 3, wherein a data transfer speed of data recorded on the first recording medium is increased based on a speed control signal. 5. The transfer rate control means, when the data is transferred from the first recording medium to the second recording medium, when the storable data amount is smaller than a predetermined reference value. 3. The data transfer device according to claim 2, wherein control is performed to reduce a transfer speed of data reproduced from the first recording medium. 6. A method for reproducing data from the first recording medium,
Further comprising processing means for transferring the reproduced data, wherein the transfer rate control means sets the storable data amount to a predetermined reference when the data is transferred from the processing means to the second recording medium. When the value is smaller than the value, a transfer rate control signal for controlling the processing means to reduce the transfer rate of the data reproduced from the first recording medium is output to the processing means, and the processing means 6. The data transfer device according to claim 5, wherein a transfer speed of data recorded on the first recording medium is reduced based on a transfer speed control signal. 7. The transfer rate control means, when the data is transferred from the second recording medium to the first recording medium, when the storable data amount is larger than a predetermined reference value. 3. The data transfer device according to claim 2, wherein the control unit controls the transfer speed to reduce the transfer speed of the data reproduced from the second recording medium. 8. A read control unit for reading data stored in the temporary storage unit, wherein the transfer speed control unit stores the data from the second storage medium to the first storage medium. Is transferred, when the storable data amount is larger than a predetermined reference value, the read control means outputs a control signal instructing to reduce the read speed, and the read control means 8. The data transfer device according to claim 7, wherein a reading speed of data stored in said temporary storage means is reduced by a control signal. 9. The transfer rate control means, when the data is transferred from the second recording medium, when the storable data amount is smaller than a predetermined reference value, the second recording medium 3. The data transfer device according to claim 2, wherein control is performed to increase a transfer speed of data reproduced from the medium. 10. The apparatus according to claim 10, further comprising: read control means for performing a read control of data stored in said temporary storage means, wherein said transfer speed control means transfers said data from said second recording medium to said first recording medium. When the data is transferred, if the storable data amount is smaller than a predetermined reference value, a control signal for instructing the read control unit to increase the read speed is output to the read control unit. 10. The data transfer device according to claim 9, wherein the control signal increases a reading speed of data stored in the temporary storage means by the control signal. 11. The data transfer device according to claim 1, wherein the non-linearly accessible second recording medium is a hard disk. 12. The data reproduced from the first recording medium and the data reproduced from the second recording medium,
The data transfer device according to claim 1, wherein the data transfer device is at least one of video data and audio data. 13. A data transfer method for performing data transfer between a first recording medium and a non-linearly accessible second recording medium, wherein the data reproduced from the first recording medium and the second recording are used. A first step of temporarily storing at least one of the data reproduced from the medium in a temporary storage unit, a second step of monitoring a storage state of the data stored in the first step, Based on the storage state of the temporary storage means monitored in the second step, at least one of data reproduced from the first recording medium and data reproduced from the second recording medium A third step of controlling a transfer rate. 14. The second step monitors a storage state of the data stored in the first step, determines a storable data amount of the temporary storage means, and the third step includes: 14. The data transfer method according to claim 13, wherein a transfer rate of data reproduced from the first recording medium or data reproduced from the second recording medium is controlled based on the storable data amount obtained in step 2. 15. The method according to claim 15, wherein, when data is transferred from the first recording medium to the second recording medium, the storable data amount is larger than a predetermined reference value. 15. The data transfer method according to claim 14, wherein control is performed to increase a transfer rate of data reproduced from the first recording medium. 16. A method for reproducing data from the first recording medium, transferring the reproduced data, and performing the first recording on the basis of the transfer speed control signal output in the third step. A fourth step of controlling to increase a transfer rate of data recorded on the medium, wherein the third step includes transferring the data from the first recording medium to the second recording medium. When the amount of storable data is larger than a predetermined reference value,
16. The data transfer method according to claim 15, wherein a transfer rate control signal for controlling a transfer rate of data reproduced from the first recording medium to be increased. 17. The method according to claim 17, wherein, when the data is transferred from the first recording medium, the storable data amount is smaller than a predetermined reference value.
15. The data transfer method according to claim 14, wherein control is performed to reduce a transfer speed of data reproduced from the recording medium. 18. A method for reproducing data from the first recording medium, transferring the reproduced data, and performing the first recording on the basis of the transfer speed control signal output in the third step. A fourth step of controlling to increase a transfer rate of data recorded on the medium, wherein the third step includes transferring the data from the first recording medium to the second recording medium. When the storable data amount is smaller than a predetermined reference value,
18. The data transfer method according to claim 17, wherein a transfer rate control signal for controlling a transfer rate of data reproduced from the first recording medium to be reduced is generated. 19. The method according to claim 19, wherein when the data is transferred from the second recording medium to the first recording medium, the storable data amount is larger than a predetermined reference value. 15. The data transfer method according to claim 14, wherein the transfer rate controls the transfer rate of the data reproduced from the second recording medium to be reduced. 20. The method according to claim 19, wherein when the data is transferred from the second recording medium to the first recording medium, the maximum value of the storable data is larger than a predetermined reference value. Outputs a control signal instructing to reduce the reading speed, and further reduces a reading speed of the data stored in the temporary storage means based on the control signal output in the third step. 20. The data transfer method according to claim 19, comprising a step. 21. The method according to claim 21, wherein, when the data is transferred from the second recording medium, the storable data amount is smaller than a predetermined reference value. 15. The data transfer method according to claim 14, wherein control is performed to increase a transfer rate of data reproduced from the medium. 22. The method according to claim 23, wherein when the data is transferred from the second recording medium to the first recording medium, the storable data amount is smaller than a predetermined reference value. Outputting a control signal instructing to increase the reading speed, and increasing the reading speed of the data stored in the temporary storage means based on the control signal output in the third step. 22. The data transfer method according to claim 21, further comprising: 23. The data transfer method according to claim 14, wherein said non-linearly accessible second recording medium is a hard disk. 24. Data reproduced from the first recording medium and data reproduced from the second recording medium,
The data transfer method according to claim 14, wherein the data transfer method is at least one of video data and audio data. 25. Input / output of a temporary storage means for temporarily storing at least one of data reproduced from a first recording medium and data reproduced from a second recording medium accessible in a non-linear manner. In a data input / output control device for controlling the storage state monitoring means for monitoring the storage state of the temporary storage means, a signal indicating the storage state is input from the storage state monitoring means, and based on the signal indicating the storage state Data input / output control means for controlling input / output of at least one of data reproduced from the first recording medium and data reproduced from the second storage medium, which is input / output to / from the temporary storage means. Data input / output control device. 26. The storage state monitoring means monitors the storage state of the temporary storage means, obtains the storable data amount of the temporary storage means, and outputs a storable data amount signal indicating the storable data amount. The input / output control unit receives the storable data amount signal from the storage state monitoring unit, and is reproduced from the first recording medium based on the storable data amount indicated by the storable data amount signal The data input / output control device according to claim 25, wherein input / output of at least one of data and data reproduced from the second recording medium is controlled. 27. An input / output of a temporary storage means for temporarily storing at least one of data reproduced from a first recording medium and data reproduced from a non-linearly accessible second recording medium. A data input / output control method, wherein: a first step of monitoring a storage state of the temporary storage means; and a first step of inputting / outputting data to / from the temporary storage means in accordance with a storage state of the temporary storage means. Controlling the input / output of at least one of the data reproduced from the first recording medium and the data reproduced from the second recording medium. 28. The first step monitors a storage state of the temporary storage means, determines a storable data amount of the temporary storage means, and the second step determines the amount of storable data in the first step. Depending on the amount of storable data, input / output of at least one of data reproduced from the first recording medium and data reproduced from the second recording medium, which is input / output to / from the temporary storage unit, is performed. 28. The data input / output control method according to claim 27, wherein the control is performed.