JP2001084177A - Data move system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely operate move even between mutually independent devices whose casings are different. SOLUTION: At the time of operating move between independent devices, the management information of storage media 1 and 12 is temporarily stored in the memories of system controlling parts 13 and 14 in devices P1 and P2 at a transmission side and a reception side, and when the move processing is not normally ended, the management information temporarily stored in the memories is returned to the storage media 1 and 12. Thus, the move can be surely operated between the mutually independent devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data move system for moving data between recording / reproducing apparatuses using a disk or the like as a recording medium via a digital interface.

[0002]

2. Description of the Related Art In recent years, with the progress of digital technology, devices for encoding video signals and music signals and digitally recording the signals have been put to practical use. In these devices, certain restrictions are imposed on duplication so that signals can be recorded and reproduced with high quality.

For example, in the case of a music signal, a compact disc (hereinafter, referred to as a CD) is provided by a mechanism called a serial copy management system (SCMS).
The copyrighted music signal recorded on the mini disc
Up to one generation of digital dubbing to a recording medium such as MD (hereinafter referred to as MD) and up to two generations of digital dubbing of a music signal recorded by an analog source are permitted for private use only. .

[0004] However, moving a music signal from one medium to another is not considered a copy, and is permitted as a custom, with no limit on the number of times.

[0005] The movement of the music signal between the media is realized by deleting the music signal copied from the copy source medium at the time of copying. This is called a move.

[0006] In such a recording / reproducing apparatus, a device capable of copying and moving has also been commercialized. For example, there is a recording / reproducing apparatus as disclosed in Japanese Patent Application Laid-Open No. 4-258834.

[0007] The configuration of the device for performing the signal move in such a conventional device will be described more specifically.

FIG. 9 is a block diagram of a conventional apparatus for moving a signal between MDs (hereinafter simply referred to as disks) as recording media.

In this apparatus, a pair of units having the same function capable of recording and reproduction are often provided in a single housing, but in order to facilitate understanding, one unit is used here. The unit U1 is a signal sending side, the other unit U2 is a signal receiving side, the transmitting unit U1 mainly has a reproducing function, and the receiving unit U2 mainly has a recording function.

First, the configuration of the transmission-side (reproduction-side) unit U1 will be described.

Reference numeral 83 denotes a servo unit. The rotation is controlled by a rotation control signal S801 so that the disk 81 rotates by a predetermined amount, and the position is controlled by a position control signal S802 so that the head 82 can read desired data.

Reference numeral 84 denotes an error correction unit. The reproduction signal S803 reproduced from the head 82 is demodulated, an error is detected and corrected using a correction code added in advance at the time of recording, and a corrected coded signal S804 is output.

Reference numeral 85 denotes a memory. Encoded signal S804
Is temporarily stored, and the stored encoded signal S805 is stored when necessary.
Is output. In the case of MD, a digital audio signal is encoded by compressing it into an information amount of about 1/5 in a frame unit of 512 samples / channel. However, the encoded signal S804 is a stored encoded signal S80 necessary for the decoding unit 6.
5 is reproduced at a rate about 5 times faster than the signal rate of 5. For this reason, the encoded signal S804 is intermittently read at a rate of about 1/5, for example, when the reproduction is performed for 2 seconds, and then for 8 seconds. The memory 5 absorbs the difference between the signal rate of the encoded signal S804 and the signal rate of the stored encoded signal S805.

Reference numeral 86 denotes a decoding unit. Stored encoded signal S
805, and outputs an audio signal S806 to the outside of the housing.

Next, the configuration of the unit U2 on the receiving side (recording side) will be described.

Reference numeral 87 denotes an encoding unit. The audio signal S807 input from the outside of the housing is compression-encoded into an information amount of about フ レ ー ム in units of 512 samples / channel, and an encoded signal S808 is output.

Reference numeral 88 denotes a memory. Encoded signal S808
Is temporarily stored, and the stored encoded signal S809 is stored when necessary.
Is output. The difference between the signal rate of the encoded signal S808 and the signal rate of the stored encoded signal S809 is determined by the memory 88.
To absorb. The recording and reproduction rate of the disc is
Set the rate higher than the signal rate of 808. In this case, the output rate of the memory 88 is higher. Therefore, intermittent recording is performed in accordance with the amount of data held, such as recording a certain amount of data when accumulated in the memory 88. Processing such as seeking is performed in this idle time.

Reference numeral 89 denotes a correction code adding unit. A correction code is added to the stored coded signal S809 to perform modulation, and
810 is output.

Reference numeral 93 denotes a servo unit. Rotation control is performed by a rotation control signal S811 so that the disk 91 performs a predetermined rotation, and position control is performed by a position control signal S812 so that the head 92 can record data.

Reference numeral 95 denotes a switch. When copying or moving from the MD on the sending side to the MD on the receiving side, the switch 95 is turned on, bypassing the decoding unit 86 and the encoding unit 87 and directly converting the stored encoded signal S805 into the encoded signal. The data can be input to the memory 88 as S808. As a result, deterioration of signal quality due to recompression is eliminated, and a higher-speed move is possible.

Reference numeral 94 denotes a system control unit. Sending side M
Reproduction and recording are controlled for the D unit and the MD unit on the receiving side by the sending side control signal S813 and the receiving side control signal S814, respectively. When performing the move, the switch 95 is connected by the bypass control signal S815.

Next, the data structure of each of the disks 81 and 91 will be described with reference to FIG. Here, only one disk 81 will be described, but the structure of the other disk 91 is basically the same.

The disc 81 has an area called TOC (table of contents) for recording data management information and a data area for recording data such as music signals. In this example, five data (for example, five music programs) are stored on the disk 81.
Is recorded.

The management information recorded in the TOC area is
According to the number of data recorded in the data area, there are a total of five sets, one for each data, and the data is written in order from the top according to a predetermined rule. Each piece of management information simultaneously manages position information indicating in which area of the data area actual data is recorded, and accompanying information such as title and copyright information. Position information on which area in the data area actual data is recorded is managed in order by TNO (track number). In this example, TNO1 to TNO5 exist.

On the other hand, the data stored in the data area is not always arranged in order from TNO1, but the order is changed in the middle like TNO3, or the unrecorded area (shaded in the figure) In some cases, although not shown, even if the data is one TNO, the area is divided and recorded without being continuous. These can all be managed by management information in the TOC area.

Next, using the apparatus having the configuration shown in FIG. 9, the disk 8 having the data structure shown in FIG.
FIG. 11 shows a conventional procedure for performing a move between the first and the second 82.
This will be described with reference to FIG.

FIG. 11A shows an example of the data structure of the disks 81 and 91 set in both units U1 and U2 before the move is performed, and FIG. 11B shows the data structure of the disks after the move is performed. It is an example of the data structure of 81 and 91.

In this case, the disk 81 set in the unit U1 on the transmitting side before the move is first performed, as shown in FIG.
It is assumed that five data are recorded in the same manner as in the example described above, and the unit U on the receiving side before the move is performed.
It is assumed that two data are already recorded in order on the disc 91 set to 2.

In this state, the operation will be described by taking as an example a case where the data D of TNO4 recorded on the disk 81 on the transmission side is moved.

First, the data D of the TNO4 of the disk 81 on the transmitting side is copied to a free area of the data area of the disk 91 on the receiving side.

When the recording of the data D of the TNO 4 is completed normally, the management information of the TNO 3 indicating the area of the data D is added to the TOC area of the disc 91 on the receiving side.
Subsequently, in the disc 81 on the transmission side, the TO
After deleting the management information of TNO4 in the area C, the contents of the management information of TNO5 below it are moved to the management information area of TNO4.

After the move is completed, the data structure of the disk 81 on the transmitting side after the move is completed is such that the management information of TNO4 is deleted from the TOC area as shown in FIG. Is written in the management information area of TNO4. The data D remains as it is because the management information managing this area has been deleted, but the TN recorded in the TOC area
Since O is unknown, it is eventually treated as an unrecorded area.

On the other hand, the disk 9 on the receiving side after the move is completed
As for No. 1, the data D of TNO4 on the disc 81 on the transmitting side is recorded as TNO3 in its data area, and the management information of TNO4 on the TOC area of the disc 81 on the transmitting side is recorded in the TOC area. But a new TN
It is added as O3 management information.

[0034]

As described above, conventionally,
The move is possible only with the device in one case in which one system control unit 94 can manage the sending side and the receiving side, and the move between the devices in different cases cannot be performed reliably. .

That is, when a case is moved between different devices, there are situations in which the connection is disconnected immediately after the data is copied and before the management information on the transmission side is deleted, or the power supply on one side is cut off. When this occurs, there is a problem that the copy is not moved and eventually remains copied, or data being moved is lost.

An object of the present invention is to solve such a conventional problem and to surely perform a move even between independent devices having different housings.

[0037]

In order to solve this problem, the present invention provides a method for transmitting a series of data, such as images and sounds, between a transmitting device and a receiving device having independent housings. In addition, using the exchangeable first and second recording media on which management information such as the recording position of the data is recorded, a series of data recorded on the first recording medium set in the transmitting device is used. Is moved to the second recording medium set in the receiving device as follows.

[0038] In the first invention, the transmitting device includes a first storage unit for temporarily storing management information previously recorded on the first recording medium before moving the data. If the normal transfer processing is executed, the first
And an erasing unit for erasing management information relating to a series of data that has been sent out of all the original management information of the recording medium. A first return unit for returning the management information before the move processing to the first recording medium, and the receiving-side apparatus stores the management information in the second recording medium before the data is moved. Second storage means for temporarily storing the recorded management information, and management of the original data recorded on the second recording medium when normal transfer processing is executed. Additional means for adding management information relating to a series of data received to the information; and management information before the move processing previously stored in the second storage means when normal transfer processing is not executed. The second
And a second return means for returning to the recording medium.

Thus, when a move is performed between independent devices, the management information of the storage medium is temporarily stored in the memory of each device on the transmission side and the reception side, and the processing is not completed normally. In this case, the management information temporarily stored in the storage medium is returned to the storage medium. This makes it possible to reliably perform the move between the independent devices.

According to a second aspect of the present invention, in the configuration of the first aspect, both the first and second storage means have non-volatile memories, and are recorded on the recording medium when power is turned on. The management information is transferred to the nonvolatile memory and stored.

Thus, when a move is performed between independent devices, the management information of each storage medium is temporarily stored in the non-volatile memory in each device on the transmission side and the reception side, and during the move process. When the process is completed normally, the contents of the management information stored in the nonvolatile memory at the end of the move process are invalidated. On the other hand, if the power is turned off during the move processing and the processing does not end normally, the management information stored in the non-volatile memory of each device is recorded when the power of the next device is turned on. Return to the medium and rewrite. This makes it possible to reliably perform the move between the independent devices.

[0042]

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

The data move system according to the first aspect of the present invention includes a series of data such as images and sounds and a recording position of the data between a transmitting device and a receiving device having independent housings. A series of data recorded on the first recording medium set in the apparatus on the transmitting side using the exchangeable first and second recording media on which the management information of A system for moving to a second recording medium set in an apparatus, wherein the transmitting-side apparatus temporarily stores management information previously recorded on the first recording medium before performing data move processing. The first storage means for storing, and when the normal transfer processing is executed, erases the management information relating to a series of data which has been sent out of all the original management information of the first recording medium. Erasing means and normal transfer processing Is not executed, there is provided first return means for returning the management information before the move processing previously stored in the first storage means to the first recording medium, The apparatus includes a second storage unit that temporarily stores the management information recorded in advance on the second recording medium before performing the move process on the data, and a device that performs a normal transfer process. Means for adding management information relating to a series of data received to the management information of the original data recorded on the second recording medium, and when the normal transfer processing is not executed, 2
And second return means for returning the management information before the move processing previously stored in the storage means to the second recording medium.

A data move system according to a second aspect of the present invention is the data move system according to the first aspect, wherein the first and second storage means both have a non-volatile memory, and are stored on the recording medium when power is turned on. The recorded management information is transferred to and stored in the nonvolatile memory.

Hereinafter, specific embodiments of the present invention will be described in more detail. Embodiment 1 FIG. 1 is a block diagram of a data move system according to Embodiment 1 of the present invention. Here, a case where an MD is used as a recording medium will be described as an example.

In this data move system, two independent devices P1 and P2 are connected to each other via a digital data bus (hereinafter simply referred to as a bus) 17 such as IEEE1394.

In practice, each of the devices P1 and P2 often has a pair of units having the same function that can be recorded and reproduced in a single housing. Therefore, one device P1 includes only a unit that sends out a signal, and the other device P2 includes only a unit that receives a signal. The unit on the transmitting side mainly has a reproducing function, and the unit on the receiving side. Has a recording function.

The bus 17 that is actually used is such that data by isochronous transfer and commands by asynchronous transfer can flow in one direction on a single signal line in an arbitrary direction in a time division manner according to a transfer packet format.
For convenience of explanation, FIG. 1 shows a data flow by isochronous transfer by a thick line and a command flow by asynchronous transfer by a thin line.

Next, the configuration of the transmitting-side (reproducing-side) device P1 will be described.

1 is a disk, 2 is a head, and 3 is a servo unit. The rotation control is performed by a rotation control signal S101 so that the disk 1 performs a predetermined rotation, and the position control is performed by a position control signal S102 so that the head 2 can read desired data.

Reference numeral 4 denotes an error correction unit. The reproduction signal S103 reproduced from the head 2 is demodulated, an error is detected and corrected using a correction code added in advance at the time of recording, and a corrected coded signal S104 is output.

Reference numeral 5 denotes a memory. The coded signal S104 is temporarily stored, and the stored coded signal S105 is output when necessary. In the case of MD, a digital audio signal is encoded by compressing it into an information amount of about 1/5 in a frame unit of 512 samples / channel.

However, the coded signal S105 is reproduced at a rate about five times faster than the signal rate of the stored coded signal S105 required for the decoding unit 6. For this reason, the coded signal S104 is intermittently read at a rate of about 1/5, for example, after playing for 2 seconds and then resting for 8 seconds. The memory 5 absorbs the difference between the signal rate of the encoded signal S104 and the signal rate of the stored encoded signal S105.

Reference numeral 6 denotes a decoding unit. Stored encoded signal S1
05 is decoded, and an audio signal S106 is output.

Reference numeral 15 denotes a digital interface unit such as IEEE1394. When dubbing or moving from the disk 1 of the device P1 on the sending side to the disk 12 of the device P2 on the receiving side, the decoding unit 6 is bypassed,
The stored encoded signal S105 can be directly output to the bus 17 as the digital interface signal S115.

Reference numeral 13 denotes a system control unit. The system control unit 13 includes an internal memory (not shown) such as a RAM, and controls the device P1 on the sending side by a control signal S113. For the digital interface unit 15,
Control for transmitting / receiving a command to / from an external device via the digital interface signal S115 is also performed.

Next, the configuration of the device P2 on the receiving side (recording side) will be described.

Reference numeral 7 denotes an encoding unit. The audio signal S107 is reduced to about 1/5 in a frame unit of 512 samples / channel.
And outputs a coded signal S108.

Reference numeral 8 denotes a memory. The coded signal S108 is temporarily stored, and the stored coded signal S109 is output when necessary. The difference between the signal rate of the encoded signal S108 and the signal rate of the stored encoded signal S109 is absorbed by the memory 8.

The recording / reproducing rate of the disk 12 is set to a rate higher than the signal rate of the encoded signal S108. In this case, the output rate of the memory 8 is higher. Therefore, intermittent recording is performed in accordance with the amount of data held, such as recording a certain amount of data when accumulated in the memory 8. Processing such as seeking is performed in this idle time.

Reference numeral 9 denotes a correction code adding unit. A correction code is added to the stored coded signal S109 to modulate the recording signal S109.
10 is output.

Reference numeral 10 denotes a servo unit. The rotation is controlled by a rotation control signal S111 so that the disk 12 performs a predetermined rotation, and the position is controlled by a position control signal S112 so that the head 11 can record data.

Reference numeral 16 denotes a digital interface unit such as IEEE1394. When copying or moving from the disk 1 of the sending device P1 to the disk 12 of the receiving device P2, the encoding unit 7 is bypassed, and the encoded signal received from the digital interface signal S115 is directly stored in the memory 8. Can be entered. As a result, deterioration of signal quality due to recompression can be eliminated, and transfer is performed with compressed data, so that high-speed move can be performed.

Reference numeral 14 denotes a system control unit. The system control unit 14 includes an internal memory (not shown) such as a RAM, and controls the receiving device P2 with a control signal S114. In addition, the digital interface unit 16 also performs control for transmitting and receiving commands to and from an external device via the digital interface signal S115.

The data structure of each of the disks 1 and 12 is the same as that described with reference to FIG.

FIG. 2 shows the devices P1 and P2 on the transmitting and receiving sides.
3 is a flowchart of a main program of the system control units 13 and 14 in FIG.

After the power is turned on, the equipment is initialized (S2).
1), and proceed to main processing (S22). In the main process, each routine is started in accordance with a panel switch of a device or a command from IEEE 1394. Here, the description of these individual processes is omitted.

FIG. 3A is a flowchart of a move process in the transmitting device P1, and FIG. 3B is a flowchart of the receiving device P2.
5 is a flowchart of a move process in FIG. FIG. 4 is a diagram for explaining the relationship between the two devices P1 and P2 at the time of move processing, and arrows indicate the exchange of commands between the devices P1 and P2 by a digital interface. FIG. 5A shows both devices P1 and P2 before the move is performed.
FIG. 5B shows an example of the data structure of the disks 1 and 12 set in the disks P1 and P2.
FIG. 6A is a diagram for explaining the data structure of P2, FIG. 6A is a diagram for explaining the data structure of both disks 1 and 12 after the move is completed normally, and FIG. FIG. 7 is a diagram for explaining the data structure of both disks 1 and 12 after the operation.

Each means in the claims is as follows:
This is realized by the system control units 13 and 14 of each device P1 and P2 and software based on the flowcharts shown in FIGS.

Next, with reference to FIGS. 3 to 6, the operation when the move process is performed between the disks 1 and 12 will be described.

Here, as in the example shown in FIG. 11 above, it is assumed that five pieces of data are recorded on the disc 1 on the transmitting side before the move, and the reception data before the move is performed. It is assumed that two data are already recorded in order on the disk 12 on the side.

In this state, a case where the data D of TNO4 recorded on the disc 1 on the transmitting side is moved will be described as an example.

When the move is started, as shown in FIG. 3, the transmitting device P1 notifies the receiving device P2 of the connection (S301). Accordingly, the receiving device P
2 confirms the connection notification (S313) and performs a preparation completion notification (S314). Thereby, the two devices P1 and P2
The connection by the digital interface is established.

As shown in FIG. 5 (a), the devices P1 and P2 on the transmitting side and the receiving side respectively
All management information in the C area is stored (S303, S3
15). The storage of the management information of the TOC area is performed using, for example, an internal memory (not shown) provided in each of the system control units 13 and 14.

The transmitting device P1 receives the data D of TNO4.
Is output as a digital interface signal S115 (S304). The receiving device P2 receives the digital interface signal S115, and records the digital interface signal S115 in a free area in the data area of the disk 12 (S316). Therefore, as shown in FIG. 5 (b), TN
The data D of O4 is transmitted to both the discs 1 and 1 on the transmission side and the reception side.
2 are present together.

When the transfer of the data D is completed, the transmitting device P1 issues a transfer end notification (S305). After confirming the normal reception (S317), the receiving device P2 confirms the end of the transmission sent from the transmitting device P1 (S31).
8), a reception completion notification is made (S319). As described above, when the transmitting device P1 confirms the reception completion (S306), the fact that the data transfer from the transmitting device P1 to the receiving device P2 has been normally completed is determined by the two devices P1 and P2. Can be confirmed respectively.

The device P1 on the transmitting side starts a timer set to a predetermined time T1 sufficient for rewriting the management information in the TOC area (S307).

During the period T1 until the timer expires, the data D in the TOC area of the disk 1
Management information related to TNO5 and TN
It moves to the management information area of O4 (S308).

Next, it is confirmed whether or not the erasure of the management information has been completed normally (S309).
A deletion completion notification is sent to the receiving side device P2 (S31).
0).

Subsequently, it is checked whether or not a notification of completion of addition has been received from the receiving apparatus P2 (S311).
If the notification arrives before the time expires, the move process is normally terminated as it is.

In this case, as shown in FIG. 6A, the data area of the disk 1 of the transmitting device P1 is
Although the data D of TNO4 remains as it is,
Since the management information related to the data D in the area C is deleted, the data D is not treated as an unrecorded area and cannot be taken out.

On the other hand, when the digital interface connection cannot be established at the start of the move in the device P1 on the transmitting side, when the management information of the disk 1 is not normally erased, or when the predetermined time T1 has elapsed. If the notification of completion of addition is not received from the receiving device P2 even if the timer expires, it is considered that everything is abnormal and stored in the internal memory of the system control unit 13 in the previous step 303. The management information is returned to the TOC area of the disk 1 as it is (S312).

On the other hand, the device P2 on the receiving side, like the device P1 on the transmitting side, has a predetermined time T2 sufficient for rewriting the TOC.
The timer is started (S320).

Then, during a period T2 until the timer expires, management information on data D in the TOC area of the disk 12 is added (S321).

Next, it is confirmed whether or not the addition of the management information has been completed normally (S322). If the addition has been completed normally, a notification of the completion of the addition is sent to the transmitting apparatus P1.
(S323).

Subsequently, it is checked whether or not a notification of the completion of erasure has been received from the transmitting apparatus P1 (S324).
If the notification arrives before the time expires, the move process is normally terminated as it is.

On the other hand, in the case where the digital interface connection cannot be established at the start of the move in the receiving device P2,
If all data cannot be copied correctly due to a write error to the device, or if a notification of erasure completion is not received from the transmitting device P1 even if the timer expires after the predetermined time T2 elapses, all abnormalities occur. Therefore, the management information stored in the internal memory of the system control unit 14 in step 315 is returned to the TOC area of the disk 12 as it is (S325).

As described above, when the move processing is completed due to the abnormality, as shown in FIG. 6B, the already copied TN is stored on the disk 12 of the receiving apparatus P2.
Although the data D of O4 remains as it is, since the management information on the data D in the TOC area is deleted,
It is treated only as an unrecorded area, and data D cannot be extracted.

In the above processing, each notification via the digital interface is described only when each processing is completed normally. However, when each step is not completed normally, the processing is abnormally terminated. Of course, it may be notified.

As described above, when performing a move between the independent devices P1 and P2 via the bus 17 capable of transmitting the command and the signal data, the management information of the disks 1 and 12 is transferred to each device P1 and P2. After being temporarily stored in an internal memory such as the system control units 13 and 14, the signal data is copied from the transmitting device P1 to the receiving device P2. If the move process is not completed normally within the predetermined time periods T1 and T2, the temporarily stored management information is returned to the TOC area of the disks 1 and 12. In this way, before erasing the management information of the transmitting device P1 immediately after copying the data, the two devices P1 and P1
Ensure that data is moved without any problems such as data being left copied or data being lost due to sudden disconnection of connection 1. Can be.

(Embodiment 2) Embodiment 2 of the present invention will be described below.

The feature of the second embodiment is that each system control unit 13,
In 14, the non-volatile memory such as an EEPROM which does not disappear even when the power is turned off is used as the internal memory used for temporarily storing the management information in the TOC area of the disks 1 and 12. is there.

FIG. 7 is a flowchart of the main program of the system control units on the transmitting side and the receiving side.

After the power is turned on, the initial settings of the device are performed (S2).
1) Check whether the disc 1 is set (S61). If the disk 1 is set, it is checked whether the management information stored in the nonvolatile memory of the system control unit 13 is valid (S62). When the move process is not performed to the end due to the power cutoff, the management information stored in the non-volatile memory becomes valid. The validity / invalidity determination in this case is performed, for example, by preparing a flag for determining validity / invalidity in the nonvolatile memory. Alternatively, the validity may be determined by providing a parity check bit or the like of the data in the nonvolatile memory.

If the management information stored in the non-volatile memory is valid, this information is read and the T
Replace with the management information in the OC area (S63). If it is not valid, nothing is performed and the process proceeds to the main processing (S22).

In the main process S22, each routine is started in accordance with a command from the panel switch of the device or the bus 17. The description of these individual processes will be omitted.

FIG. 8A is a flowchart of the move process of the device P1 on the transmission side, and FIG. 8B is a flowchart of the move process of the device P2 on the reception side.

Processing for initializing the management information stored in the nonvolatile memory immediately before the end (S701, S702)
The operations other than the addition of are the same as in the case of the flowchart shown in FIG.

When the move processing is completed normally to the end, the management information stored in the nonvolatile memory is initialized (S701 and S702). Otherwise, the management information stored in the non-volatile memory remains uninitialized and becomes valid, so that the management information in the TOC area of the disks 1 and 12 will be Works to restore.

As described above, also in the second embodiment, the management information of each of the disks 1 and 12 on the transmission side and the reception side is temporarily stored in the nonvolatile memory, and the signal data is transmitted from the transmission side to the reception side. And updates the management information of each of the disks 1 and 12, and notifies the other apparatuses P1 and P2 that the processing has been normally completed within a fixed time.
If the process does not end normally during the move process,
The management information of the disks 1 and 12 is returned to the management information temporarily stored in the nonvolatile memory.

When the move processing is completed normally, the contents of the nonvolatile memories are initialized and invalidated. By moving in this way, the copyright is infringed even if the connection is disconnected or the power is cut off on one side before deleting the management information on the transmitting side immediately after copying the data. There is no problem that such a copy is made or the data being moved is lost, and the move can be performed reliably.

[0102]

According to the present invention, the following effects can be obtained. (1) When a move is performed between two independent devices, the copy is disconnected by deleting the management information on the transmission side immediately after copying the data or by turning off only one of the power supplies. The move can be reliably performed without causing the problem that the data is lost or the data during the movement is lost. (2) One signal recording / reproducing unit can be provided in one housing without preparing a device such as a conventional move device in which two signal recording / reproducing units are contained in one housing. Since the move can be realized by preparing two devices having a general configuration, the device is inexpensive and extremely practical.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a data move system according to a first embodiment of the present invention.

FIG. 2 is a flowchart of a main program of a system control unit provided in a transmission side device and a reception side device of the system.

FIG. 3 is a flowchart of a move process in a system control unit of a transmission side device and a reception side device of the same system.
(a) shows a move process of the transmitting device, and (b) shows a move process of the receiving device.

FIG. 4 is an explanatory diagram for supplementing a mutual relationship at the time of a move process between devices on a transmission side and a reception side in the same system.

FIG. 5 is an explanatory diagram showing an example of a data structure of a disk;
(A) shows the state of the disk on the transmitting side and the receiving side before the move, and (b) shows the state of the disk on the transmitting side and the receiving side immediately after the data transfer.

FIG. 6 is an explanatory diagram showing an example of a data structure of a disk.
(A) shows the state of the disk on the transmitting side and the receiving side after the move is completed normally, and (b) shows the state of the disk on the transmitting side and the receiving side after the move is abnormally terminated.

FIG. 7 is a flowchart of a main program of a system control unit provided in each device on the transmission side and the reception side according to the second embodiment of the present invention;

8 is a flowchart of a move process in a system control unit of a transmission side device and a reception side device of the system in FIG. 7; FIG. 8A is a move process of a transmission side device; FIG. Shows the move process of the device

FIG. 9 is a block diagram showing a configuration for moving data from one disk to another disk in a conventional single device.

FIG. 10 is an explanatory diagram showing an example of a data structure of a disk.

11A and 11B are explanatory diagrams showing an example of the data structure of a disk. FIG. 11A shows the state of the disk on the transmitting side and the receiving side before the move, and FIG. 11B shows the state of the disk after the move. Indicates the status of the receiving and receiving disks

[Explanation of symbols]

1,12 disk, 2,11 head, 3,10 servo section, 4 error correction section, 5,8 memory, 6 decoding section, 7 coding section, 9 correction code adding section, 13,14 ...
System control unit, 15, 16 ... Digital interface unit, 17 ... Bus.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B017 AA06 BA04 BA08 BB02 BB10 CA07 CA16 5D044 BC06 CC04 DE22 DE49 DE50 DE52 EF03 FG10 HL07 HL11

Claims (2)

[Claims] 1. An exchange in which a series of data such as images and sounds and management information such as a recording position of the data are recorded between a transmitting apparatus and a receiving apparatus having independent housings. Using possible first and second recording media,
A system for moving a series of data recorded on a first recording medium set in the transmitting device to a second recording medium set in the receiving device, comprising: The apparatus has first storage means for temporarily storing management information previously recorded on the first recording medium before moving data, and when a normal transfer process is executed, Erasing means for erasing management information relating to a series of data sent from among all the original management information of the first recording medium; and when the normal transfer processing is not executed, the first storage means. A first return unit for returning the management information before the move processing stored beforehand to the first recording medium, while the receiving-side apparatus performs the first 2 recorded on the recording medium Second storage means for temporarily storing the management information, and when the normal transfer processing is executed, the management information of the original data recorded on the second recording medium is received. Means for adding management information relating to the series of data obtained, and when the normal transfer processing is not executed, the management information before the move processing previously stored in the second storage means is stored in the second storage means. A data move system comprising: a second return unit that returns to a recording medium. 2. The data move system according to claim 1, wherein each of said first and second storage means has a non-volatile memory, and is recorded on said recording medium when power is turned on. A data move system, wherein information is transferred to and stored in the nonvolatile memory.