JPH10162502A - Data recording and reproducing apparatus and controlling method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize various ways of use and effectively transfer raw data. SOLUTION: A slave device 11 reproduces data recorded in a data recording and reproducing unit 21 and transfer the data to decoder units 22a-22d to output image and audio data. In addition, the slave device 11 receives raw data transferred from a master device via an interface unit 23 as an input and records the data by the data recording and reproducing unit 21. The slave device 11 controls data transfer using a time slot so as to avoid the data transfer among the respective units on a data bus 25 from competing. With respect to the respective slave devices connected to the same master device, the time slots for system management to be used for the data transfer from the master device are provided at different positions, and the master device transfers the raw data to the respective slave devices in accordance with the time slot for system management in each of the slave devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording / reproducing apparatus for recording and reproducing video data, audio data and the like, and a control method therefor.

[0002]

2. Description of the Related Art In recent years, with the spread of information channels due to the spread of CATV (cable television) and the like, unlike conventional VTRs (video tape recorders),
Multiple video / audio data from one video / audio data recording / reproducing device
There is an increasing demand for simultaneously reproducing audio data. In order to satisfy this demand, devices for recording and reproducing video and audio data using a recording and reproducing medium such as a hard disk which can be accessed randomly are becoming widespread.

In general, in a video / audio data recording / reproducing apparatus in a broadcasting station, the required data transfer rate is high due to demands for image quality and sound quality. Since it is necessary to have a large capacity, multiple hard disk drives are operated in parallel to increase the transfer rate and capacity, and by recording parity data, any hard disk drive should fail However, there is a demand for an apparatus having a configuration that can ensure reliability.

Here, a general configuration of a disk array device including a plurality of hard disks will be described with reference to FIG. This disk array device includes a plurality of hard disk drives 101 to 105 and a disk array controller 106 that controls these hard disk drives 101 to 105. One hard disk drive 105 among the plurality of hard disk drives 101 to 105 is dedicated to parity data. Although FIG. 6 shows five hard disk drives 101 to 105, the number of hard disk drives is not limited to this.

In the disk array device shown in FIG. 6, the input data 107 is divided by the disk array controller 106 into predetermined units (for example, 1 byte), and the divided data D ₀ and D in the predetermined units are divided. ₁ ,
D ₃ , D ₄ , D ₅ ,...
Each hard disk drive 10 in order according to 1 to 104
The data is written to the hard disks in 1 to 104. Also,
The parity data P ₀ , P ₁ , of the data written to the hard disk by each of the hard disk drives 101 to 104 by the disk array controller 106.
Are calculated, and the parity data P ₀ , P ₁ ,.
The data is written to the hard disk in the hard disk drive 105 by the dedicated hard disk drive 105. Dividing and recording data on a plurality of hard disks in this way is striping.
Called. In the disk array device shown in FIG. 6, when the data recorded by each of the hard disk drives 101 to 104 is reproduced, each of the hard disk drives 101 is
The data is reproduced from .about.104, and the reproduced data is arranged in the same manner as at the time of input, unified, and output. Dividing data recorded on a plurality of hard disks in this manner is called unification. At the time of data reproduction, the disk array controller 106
Reproduces parity data from the hard disk drive 105, and performs error detection and error correction based on the parity data.

In the disk array device as shown in FIG. 6, when any one of the hard disk drives 101 to 104 fails, the data is recorded on the basis of the data recorded by the other normal hard disk drive and the parity data. Thus, the original data can be reconstructed, thereby improving the reliability as a data recording / reproducing device.

On the other hand, since the input / output transfer rate is improved by operating a plurality of hard disk drives in parallel, a high transfer rate is required, and video / audio data recording / reproducing has been difficult to construct with a single hard disk drive. The use of a disk array device also makes it possible to configure a device using a hard disk drive as a recording / reproducing unit.

Further, in order to cope with recent CATV and multi-channels in general broadcasting stations, a disk array device is used instead of a transmission device which is conventionally configured using VTRs of the number corresponding to the number of channels. There is an increasing demand for replacing a single device with a device capable of simultaneously extracting a plurality of outputs.

[0009]

By the way, in the transmitting apparatus, the number of channels required differs depending on the contents and the broadcasting form of the program which the broadcasting station introducing the transmitting apparatus intends to provide, and a plurality of material data are distributed. Such as when it is desired to simultaneously record and transmit multiple channels at the same time, or when the same material data is to be reproduced on multiple channels with a different reproduction time for near video on demand (NVOD). Various usage patterns are conceivable.

[0010] Therefore, conventionally, in the transmission device, it is necessary to make the device itself according to the required number of channels.
As a result, other models have the same structure, so there is no cost advantage or it is not possible to respond to requests to increase the number of channels in the future. There was a problem.

[0011] Further, when broadcasting is performed continuously for 24 hours, it is necessary to replace the material data supplied as the program data without stopping the service. However, there is a problem that the material data cannot be efficiently transferred due to the necessity of duplication or automation.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a data recording / reproducing apparatus which enables various use modes and can efficiently transfer material data. And a control method thereof.

[0013]

A data recording / reproducing apparatus according to the present invention comprises a plurality of slave units for recording and reproducing material data to be transmitted to the outside, and a master unit for transferring material data to each slave unit. The slave unit has a data recording / reproducing unit for recording and reproducing material data, a data input unit for inputting material data transferred from the master device, and a material data reproduced from the data recording / reproducing unit. One or more data output units for sending to the outside, a common bus to which a data recording / reproducing unit, a data input unit, and a data output unit are connected; A data transmission time slot for transmitting material data reproduced from the recording / reproducing unit to the outside and a data input unit occupy the bus and the material data transferred from the master unit. Data into a plurality of time slots including a time slot for data transfer for recording the data in the data recording / reproducing unit, and the time slot for data transfer is temporally different for each slave unit. Control means for setting a time slot and controlling a data recording / reproducing unit, a data input unit and a data output unit in accordance with the time slot, wherein the master unit transmits data to each slave unit for each slave unit. It is configured to transfer the material data in accordance with the time slot for use.

A control method for a data recording / reproducing apparatus according to the present invention comprises a plurality of slave units for recording and reproducing material data to be transmitted to the outside, and a master unit for transferring material data to each slave unit. , The slave unit,
A data recording / reproducing unit for recording and reproducing the material data; a data input unit for inputting the material data transferred from the master unit; and at least one for sending the material data reproduced from the data recording / reproducing unit to the outside A data output unit,
A method for controlling a data recording / reproducing apparatus having a data recording / reproducing unit, a common bus to which a data input unit and a data output unit are connected, wherein the data output unit occupies the bus for a fixed time interval. Time slot for data transmission for sending material data reproduced from the unit to the outside, and data transfer for recording material data transferred from the master unit to the data recording / reproducing unit by occupying the bus with the data input unit A time slot is divided into a plurality of time slots including a time slot, and a time slot is set so that a time slot for data transfer is temporally different for each slave unit. In addition to controlling the data recording / reproducing unit, data input unit and data output unit, each slave unit In accordance with the data transfer time slot controls the master unit to perform transfer of the material data.

According to the data recording / reproducing apparatus and the control method of the data recording / reproducing apparatus of the present invention, the data output section occupies the bus and sends out the material data reproduced from the data recording / reproducing section to the outside at predetermined time intervals. The data is divided into a plurality of time slots including a data transmission time slot and a data transfer time slot for recording material data transferred from the master unit to the data recording / reproducing unit by occupying the bus with the data input unit occupying the bus. By controlling the recording / reproducing unit, the data input unit, and the data output unit, it is possible to record the material data transferred from the master device while transmitting the material data to the outside in the slave device. Further, in the data recording / reproducing apparatus and the control method of the data recording / reproducing apparatus of the present invention, time slots are set such that the time slot for data transfer is temporally different for each slave device, and the master device is assigned to each slave device. On the other hand,
Since the material data is transferred in accordance with the data transfer time slot of each slave unit, the material data can be efficiently transferred.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a data recording / reproducing apparatus according to one embodiment of the present invention. The data recording / reproducing device according to the present embodiment is used as a multi-channel automatic transmission device. This data recording / reproducing apparatus has one master device 1
0, a plurality of (four in the example shown in FIG. 1) slave devices 11A to 11D connected to the master device 10, and a control computer 12 connected to the master device 10.

Each of the slave units 11A to 11D has a video output terminal and an audio output terminal of a plurality of channels (four channels in the example shown in FIG. 1). FIG.
_Here , the video data output from the video output terminal of the slave device 11A is V _{O1 to} V _O4 , the video data output from the video output terminal of the slave device 11B is V _{O5 to} V _O8 ,
The video data output from the video output terminal of 1C is V _O9 -V
_O12 and the video data output from the video output terminal of the slave device 11D are shown as V _{O13 to} V _O16 . Each of the slave units 11A to 11D accumulates the material data transferred from the master unit 10, reproduces the material data according to a predetermined schedule, and sends out the program data from the video output terminal and the audio output terminal. I have.

The master unit 10 stores the material data, reproduces the material data according to a predetermined schedule, and transfers the reproduced data to the slave units 11A to 11D. The control computer 12 is for managing the transmission time of the program and its contents in the entire system using the data recording / reproducing apparatus, and controls the transmission program from the slave units 11A to 11D and the master unit 10 The stored material data of the program is transferred to the slave device 1 according to a predetermined schedule.
1A to 11D, and controls the master device 10 to record new material data.

FIG. 2 shows the slave unit 11 (1) shown in FIG.
1A to 11D are represented. FIG. 2 is a block diagram showing the configuration of FIG. The slave unit 11 has a data recording / reproducing unit 21 having a disk array structure capable of securing redundancy, increasing the transfer rate during recording / reproducing, and increasing the capacity, and processing reproduced data from the data recording / reproducing unit 21. And four decoder sections 22a to 22d for outputting as video data and audio data, an interface section 23 for connection to the master unit 10, a control unit 24 for controlling the entire slave unit 11, Recording / reproducing unit 21,
A common data bus 2 to which the decoder units 22a to 22d, the interface unit 23, and the control unit 24 are connected.
5 is provided.

The data recording / reproducing unit 21 includes a plurality of hard disk drives (hereinafter, referred to as HDDs) 27, a dividing / unifying unit 28 for controlling these HDDs 27, A bus interface 29 for connecting to the bus 25; HDD27
In, compressed data obtained by compressing video / audio data is recorded on a disk. Note that multiple HDDs
One of the 27 is dedicated to parity data.
The function of the dividing / unifying unit 28 is the same as that of the disk array controller 106 in FIG.

The decoder section 22 (represented by 22 a to 22 d) includes a buffer memory 32 for temporarily storing reproduction data from the data recording / reproducing section 21, a buffer memory 32 and a data bus 25. And a bit rate reduction (hereinafter, referred to as BRR) decoder for decompressing (decoding) compressed data which is output data of the buffer memory 32 to generate video data and audio data. 33
And a video interface 34 for outputting the video data V _O output from the BRR decoder 33 to the outside.
And audio data A _O output from the BRR decoder 33
Interface 35 for outputting audio to the outside
And

The interface unit 23 includes a network interface 36 for connection to the master unit 10, a buffer memory 37 connected to the network interface 36, and a bus for connecting the buffer memory 37 to the data bus 25. Interface 38.

The control unit 24 includes a CPU (central processing unit) 41, a memory 42 including a ROM (read only memory) and a RAM (random access memory), and a CP to which the CPU 41 and the memory 42 are connected.
It has a U bus 43 and a bus bridge 44 for connecting the CPU bus 43 and the data bus 25.

FIG. 3 is a block diagram showing the configuration of master unit 10 in FIG. The master unit 10 includes a data recording / reproducing unit 51 having a disk array structure capable of securing redundancy, increasing the transfer rate during recording / reproducing, and increasing the capacity.
And an encoder unit 52 for converting video and audio data input from the outside into a format for recording, and four interface units for connection for transferring reproduction data from the data recording / reproduction unit 51 to the slave device 11 53a-
53d, a control unit 54 for controlling the entire master unit 10, a data recording / reproducing unit 51, an encoder unit 52,
It has a common data bus 55 to which the interface units 53a to 53d and the control unit 54 are connected.

The data recording / reproducing unit 51 includes a slave unit 11
As with the data recording / reproducing unit 21 in the
57, a dividing / unifying unit 58 for controlling these HDDs 57, and a bus interface 59 for connecting the dividing / unifying unit 58 to the data bus 55. In the HDD 57, compressed data obtained by compressing video / audio data is recorded on a disk. One of the plurality of HDDs 57 is dedicated to parity data. The function of the dividing / unifying unit 58 is the same as that of the disk array controller 106 in FIG.

[0026] The encoder unit 52 includes a video interface 61 for inputting image data V _I from the outside,
An audio interface 62 for inputting voice data A _I from the outside, the video data V _I and the audio interface 62, entered in the video interface 61
In the compression processing and the audio data A _I input (encoded)
A BRR encoder 63 for generating compressed data, a buffer memory 64 for temporarily storing output data of the BRR encoder 63, and a buffer memory 6
5 and a bus interface 65 for connecting the data bus 55.

The interface unit 53 (represented by 53a to 53d) includes a network interface 66 for connection to the slave unit 11, and a buffer memory 67 connected to the network interface 66.
And a bus interface 68 for connecting the buffer memory 67 and the data bus 55. The interface units 53a to 53d are connected to the slave units 11A to 11D in FIG. 1, respectively.

The control unit 54 includes a CPU 71 and an R
It has a memory 72 including an OM and a RAM, a CPU bus 73 to which the CPU 71 and the memory 72 are connected, and a bus bridge 74 for connecting the CPU bus 73 and the data bus 55.

Next, the operation of the data recording / reproducing apparatus according to the present embodiment will be described. First, the operation of the slave device 11 shown in FIG. 2 will be described. The control unit 24 in the slave unit 11
The following control is performed by executing a program stored in the ROM using M as a working area. That is, the control unit 24 reproduces data recorded in advance in the data recording / reproducing unit 21 at a scheduled time, transfers the data to one or more of the decoder units 22a to 22d, and・ Control to output audio data. Thereby, the slave unit 11
An NVOD operation of broadcasting the same material at staggered times can be realized, or a different material can be transmitted to each of the decoder units 22a to 22d to perform a multi-channel transmission operation. Also, the control unit 24
The material data transferred from the master device 10 is input by the interface unit 23 and the data recording / reproducing unit 21 controls recording.

The data recording / reproducing section 21 to the decoder section 22
When the data is transferred to the HDD, the data reproduced from each HDD 27 is arranged and unified by the division / single unit 28 of the data recording / reproducing unit 21 in the same manner as at the time of input.
In addition, error detection and error correction using the parity data are performed to generate output data, and the output data is transmitted to the data bus 25 by the bus interface 29. This data is input to the bus interface 31 of the decoder unit 22 to which the data is to be transferred.
After that, the data is temporarily expanded by a BRR decoder 33 to generate video data and audio data, which are output to the outside by a video interface 34 and an audio interface 35, respectively.

When recording material data transferred from the master unit 10 in the data recording / reproducing unit 21, the master unit 10
Is transferred to the network interface 36 of the interface unit 23, temporarily stored in the buffer memory 37, and then sent out to the data bus 25 by the bus interface 38. This data is stored in the bus interface 29 of the data recording / reproducing unit 21.
To the plurality of HDDs by the dividing / unifying unit 28.
27, the data is divided and recorded, the parity data is calculated, and the parity data is recorded in the dedicated HDD 27.

The slave unit 11 uses a time slot, which is a time delimiter, on the data bus 25 so that data transfer between the units connected to the data bus 25 does not conflict. Is controlling the transfer. Here, the control of the data transfer will be described with reference to FIG. FIG. 4A shows the contents of a time slot. As described above, in the slave unit 11, the fixed time interval T1 is set to the five time slots TS1 to TS1.
TS5. Time slots TS1 to TS4
Are used for the decoder units 22a to 22d, respectively, and during the time slot, the corresponding decoder unit 22a is used.
a to 22d occupy the data bus 25. The time slot TS5 is used for system management, and is used for communication between the slave unit 11 and the master unit 10, maintenance in the system, and the like.

The control section 24 sends commands necessary for data reproduction to the decoder sections 22a to 22d and the data recording / reproducing section 2 in accordance with the time slots shown in FIG.
1, the right to use the data bus 25 is assigned to the decoder 2
2a to 22d. FIG. 4 (b), (c)
Shows the state of the data bus when the reproduction data from the data recording / reproducing unit 21 is transferred to each of the decoder units 22a to 22d, and the state of the data recording / reproducing unit 21.
In the figure, C1 to C4 represent commands sent from the control unit 24 to the decoder units 22a to 22d and the data recording / reproducing unit 21, respectively, and R1 to R4 are respectively transferred from the data recording / reproducing unit 21 to the respective decoder units 22a to 22d. Represents reproduced data to be reproduced. FIG. 4D shows the reproduction data R
2 shows the operation of each HDD 27 of the data recording / reproducing unit 21 by taking the case of reproducing the data as an example. In this operation, first, a command is sent to the HDD 27 via a SCSI bus connected to each HDD 27, and the command is interpreted and executed inside the HDD 27. That is, H
After the seek and the rotation wait, the DD 27 reproduces desired data. This playback data is transferred from the HDD 27 to the SCS
The data is transferred to the I bus.
DD27 returns a status to that effect on the SCSI bus.

As shown in FIG. 4, the slave unit 11 performs control by dividing the fixed time interval T1 into time slots TS1 to TS4 for the decoder units 22a to 22d and a time slot TS5 for system management. While reproducing video / audio data continuously, new material data can be recorded and maintenance in the system can be performed using the time slot TS5 for system management.

Each of the decoder sections 22a to 22d has a buffer memory 32 for temporarily storing data required for continuously reproducing video or audio during a predetermined time interval T1, and as a result, A plurality of video / audio data can be simultaneously reproduced from one data recording / reproducing unit 21.

Next, the operation of the master unit 10 shown in FIG. 3 will be described. The control unit 54 in the master unit 10 performs the following control by executing a program stored in the ROM using the RAM in the memory 72 as a working area. That is, the control unit 54 records the video / audio data input to the encoder unit 52 in the data recording / reproducing unit 51, or converts the video / audio data recorded in the data recording / reproducing unit 51 in advance for a predetermined time. To the interface section 53a.
５３53d is transferred to any one or a plurality of interface units.

When recording the video / audio data input to the encoder unit 52 in the data recording / reproducing unit 51, the video data V _I and the audio data A _I from the outside are respectively
The data is input to a BRR encoder 63 via a video interface 61 and an audio interface 62, and is subjected to a compression process to generate compressed data. The compressed data is temporarily stored in the buffer memory 64 and then sent out to the data bus 55 by the bus interface 65. This data is input to the bus interface 59 of the data recording / reproducing unit 51, divided and recorded in the plurality of HDDs 57 by the dividing / unifying unit 58, and the parity data is calculated.
57.

When data is transferred from the data recording / reproducing unit 51 to the interfaces 53a to 53d, each of the HDDs 5 is divided by the dividing / unifying unit 58 of the data recording / reproducing unit 51.
7, the data reproduced is arranged and unified in the same manner as at the time of input, and error detection and error correction using parity data are performed to generate output data. Is transmitted to the data bus 55. This data is input to the bus interface 68 of the interface unit 53 to be transferred, temporarily stored in the buffer memory 67, and then transferred by the network interface 66 to the slave device 11 connected to the interface unit 53. .

In the master unit 10, similarly to the slave unit 11, the fixed time interval T 1 is set on the data bus 55 so that data transfer between the units connected to the data bus 55 does not conflict. Data transfer is controlled by dividing the time into five time slots. In the time slot, each interface unit 53
a-53d and the encoder 52. Four time slots for each of the interface units 53a to 53d are used to transfer data to each of the slave units 11A to 11D via the respective interface units 53a to 53d and to control each of the slave units 11A to 11D. The time slot for the encoder unit 52 is
2 is used to record the data input to the data recording / reproducing unit 51.

Next, control of the operation between the master unit 10 and the slave units 11A to 11D shown in FIG. 1 will be described with reference to FIG. FIGS. 5A to 5D show allocation of time slots in the slave units 11A to 11D, respectively. Thus, in the data recording / reproducing apparatus according to the present embodiment, each of the slave units 11A to 11A
In D, the fixed time interval T1 is set at the decoder unit 22.
Control is performed separately for the time slots TS1 to TS4 for a to 22d and the time slot TS5 for system management. However, the time slot TS5 for system management for each of the slave units 11A to 11D does not overlap in time. Are shifted in time slot units. In the example shown in FIG. 5, the position of the system management time slot TS5 for each of the slave units 11A to 11D is set at the beginning in the slave unit 11A, the second in the slave unit 11B, the third in the slave unit 11C, and the third in the slave unit 11D. Although it is the fourth,
The position of the system management time slot TS5 for each of the slave units 11A to 11D is not limited to that shown in FIG.
It should just be different from each other.

FIG. 5E shows the assignment of time slots in the master unit 10. As described above, in the master unit 10, the fixed time interval T1 is sequentially set from the top to the four time slots T for the interface units 53a to 53d, that is, for the slave units 11A to 11D.
The time slots are divided into five time slots S11 to TS14 and a time slot TS15 for the encoder unit 52. Here, as can be seen from FIGS. 5A to 5E, the time slots TS11 to TS14 for the slave units 11A to 11D in the master unit 10 correspond to the system management times in the slave units 11A to 11D, respectively. The position (timing) matches the slot TS5. In addition,
Master device 10 and slave devices 11A-1 shown in FIG.
1D, a common synchronization signal (reference signal) is input, and the master unit 10 and the slave units 11A to 11A
1D operates in synchronization with this synchronization signal. Therefore, the fixed time interval T1 shown in FIG. 5 and the time slots therein are completely synchronized.

Each of the slave units 11A to 11D operates in accordance with the timings shown in FIGS.
By using the time slots TS1 to TS4 to distribute continuous video / audio data to the decoder sections 22a to 22d for continuous reproduction, the system section time slot TS5 is used to connect the interface section 23 to the decoder section 22a to 22d. It communicates with the master device 10 via the master device 10 and, if necessary, receives new material data from the master device 10 and records it in the data recording / reproducing apparatus 21.

On the other hand, when viewed from the master machine 10 side, FIG.
As shown in (e), since the time slots TS11 to TS14 for each of the slave units 11A to 11D are provided, the timing for sending data to each of the slave units 11A to 11D does not overlap, and the master unit does not overlap. Machine 10
From one data recording / reproducing unit 51 via a plurality of interface units 53a to 53d.
The same or different material data can be freely transferred to 1A to 11D. Also, master machine 1
0, the time slot TS15 for the encoder unit 52
It is possible to perform the necessary processing for recording on the video / audio data input to the encoder unit 52 and record the data in the data recording / reproducing unit 51 using the above.

As described above, according to the data recording / reproducing apparatus of the present embodiment, the master device 10A can be operated without stopping the current program transmission in the slave devices 11A to 11D.
, The material data is transferred to the slave units 11A to 11D, and the data of the next scheduled program can be recorded in the master unit 10.

The order of the time slots in the master unit 10 and the slave units 11A to 11D as shown in FIG. 5 is set by the control computer 12 in FIG. 1, for example.

As described above, according to the data recording / reproducing apparatus of the present embodiment, in the slave unit 11, the data recording / reproducing unit 21, the decoder units 22a to 22d, the interface unit 23, and the control unit 24 are common. Since the bus is connected to the data bus 25 and bus control using time slots is performed to avoid contention on the data bus 25, one data recording / reproducing unit 21 is connected to the decoder units 22a to 22d and the interface unit 23. It becomes possible to record and reproduce data in parallel by sharing. Similarly, in the master unit 10, the data recording / reproducing unit 5
1, encoder unit 52, interface units 53a to 53
d and the control unit 54 are connected to a common data bus 55, and bus control using time slots is performed to avoid contention on the data bus 55. Therefore, one data recording / reproducing unit 51 is connected to the encoder unit. 52 and the interface units 53a to 53d, so that data recording and reproduction can be performed in parallel.

Therefore, the data recording / reproducing apparatus according to the present embodiment can cope with various numbers of channels,
Various usage forms are possible, such as transmitting a plurality of material data simultaneously on multiple channels, or transmitting the same material data on multiple channels with a staggered playback time.

Further, according to the data recording / reproducing apparatus according to the present embodiment, the system management time slot TS5 for each of the slave units 11A to 11D is shifted in time, and each of the slave units 11A to 11D in the master unit 10 is shifted. (Timing) of the time slots TS11 to TS14 for use in the slave unit 11A to 11D coincide with the position (timing) of the time slot TS5 for system management in each of the slave units 11A to 11D.
A to 11D, all the slave units 11A to 11D can be operated synchronously under the control of the master unit 10, and the master unit 10 can control the slave units 11A to 11D.
When transferring the material to A to 11D, the material data can be efficiently transferred without having to stop the service or partially duplicate the device.

The present invention is not limited to the above embodiment. For example, the slave unit 11 shown in FIG. 2 is provided with four decoder units 22a to 22d.
The number of decoder units provided in 1 is not limited to this, and may be, for example, one.

[0050]

As described above, according to the data recording / reproducing apparatus according to any one of claims 1 to 3, or the control method of the data recording / reproducing apparatus according to claim 4, the material data to be transmitted to the outside. In a data recording / reproducing apparatus including a plurality of slave units for recording and reproducing data and a master unit for transferring material data to each slave unit, a data output unit occupies a bus at fixed time intervals to record data. A data transmission time slot for transmitting material data reproduced from the reproducing unit to the outside and a data input unit occupying the bus and data transfer for recording material data transferred from the master unit to the data recording / reproducing unit. And time slots such that the data transfer time slots are temporally different for each slave unit. Set the lot, according to the time slot, the data recording and reproducing unit in the slave machine,
In addition to controlling the data input unit and data output unit, the master unit transfers material data to each slave unit in accordance with the data transfer time slot of each slave unit. And the material data can be efficiently transferred.

Further, according to the data recording / reproducing apparatus of the third aspect, the master unit has a data recording / reproducing unit for recording and reproducing material data to be transferred to the slave unit, A master machine side data input section for inputting material data to be supplied, a plurality of master machine side data output sections for transferring material data reproduced from the master machine side data recording / reproducing section to each slave machine, The master unit data input unit occupies the master unit bus at a fixed time interval with the common master unit bus to which the unit data recording / reproducing unit, master unit data input unit, and master unit data output unit are connected. Time slot for data recording for recording material data supplied from the outside to the data recording / reproducing unit on the master unit and the data output unit on the master unit occupy the bus on the master unit A plurality of time slots including a plurality of master-device-side data transfer time slots for transferring material data reproduced from the master-device-side data recording / reproducing unit to each slave device, and each master-device-side data transfer Time slot is set in time with the data transfer time slot of the corresponding slave unit. According to this time slot, the master unit side data recording / reproducing unit, master unit side data input unit, and master unit side data The master unit-side control means for controlling the output unit is provided, so that in addition to the effect of the data recording / reproducing apparatus according to claim 1, the transmission of the material data in the slave unit and the material data from the master unit to the slave unit. It is possible to record new material data on the master machine while transferring .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a data recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a slave device in FIG.

FIG. 3 is a block diagram showing a configuration of a master machine in FIG.

FIG. 4 is an explanatory diagram for explaining an operation of the slave device shown in FIG. 2;

FIG. 5 is an explanatory diagram for describing control of an operation between a master unit and a slave unit in FIG. 1;

FIG. 6 is an explanatory diagram for explaining a general configuration of a disk array device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Master machine, 11 (11A-11D) ... Slave machine, 21 ... Data recording / reproducing part, 22a-22d ... Decoder part, 23 ... Interface part, 24 ... Control part, 25 ... Data bus, 51 ... Data recording / reproducing part , 52
... Encoder unit, 53a-53d ... Interface unit
54: control unit, 55: data bus

Claims (4)

[Claims] 1. A system comprising: a plurality of slave units for recording and reproducing material data to be transmitted to the outside; and a master unit for transferring material data to each slave unit, wherein the slave units record material data. A data recording / reproducing unit for performing reproduction and reproduction; a data input unit for inputting material data transferred from the master unit; and one or more data for sending the material data reproduced from the data recording / reproducing unit to the outside An output unit, a common bus to which the data recording / reproducing unit, the data input unit, and the data output unit are connected; and a fixed time interval, wherein the data output unit occupies the bus and the data recording / reproducing unit A data transmission time slot for transmitting reproduced material data to the outside and the data input unit occupy the bus and are transferred from the master unit. The data is divided into a plurality of time slots which are time divisions including a data transfer time slot for recording material data in the data recording / reproducing unit, and the data transfer time slot is temporally different for each slave device. Control means for controlling the data recording / reproducing unit, the data input unit and the data output unit according to the time slot, and the master unit is provided for each slave unit. A data recording / reproducing apparatus for transferring material data in accordance with a data transfer time slot of each slave device. 2. The data recording / reproducing unit records divided data obtained by dividing input data and data for error detection and correction of the input data by a plurality of hard disk drives, and records the divided data recorded by the plurality of hard disk drives. 2. The data recording / reproducing apparatus according to claim 1, wherein the data recording / reproducing apparatus reproduces and unifies the data, and performs error detection and error correction using the data for error detection and correction to generate output data. 3. The master unit data recording / reproducing unit for recording and reproducing material data to be transferred to the slave unit, and a master unit for inputting externally supplied material data. Side data input unit; a plurality of master unit-side data output units for transferring material data reproduced from the master unit-side data recording / reproducing unit to each slave unit; the master unit-side data recording / reproducing unit; A common master device-side bus to which the device-side data input unit and the master device-side data output unit are connected, and a fixed time interval supplied from outside by the master device-side data input unit occupying the master device-side bus A data recording time slot for recording material data to be recorded in the master unit data recording / reproducing unit and the master unit side data output unit occupy the master unit side bus. A plurality of time slots including a plurality of master-device-side data transfer time slots for transferring material data reproduced by the master-device-side data recording / reproducing unit to each slave device. A transfer time slot is set in time with a data transfer time slot in a corresponding slave unit, and the master unit-side data recording / reproducing unit, the master unit-side data input unit, and the 2. The data recording / reproducing apparatus according to claim 1, further comprising: a master unit-side control unit that controls a master unit-side data output unit. 4. A system comprising: a plurality of slave units for recording and reproducing material data to be transmitted to the outside; and a master unit for transferring material data to each slave unit, wherein the slave units record the material data. A data recording / reproducing unit for performing reproduction and reproduction, a data input unit for inputting material data transferred from the master unit, and one or more data for sending the material data reproduced from the data recording / reproducing unit to the outside A method for controlling a data recording / reproducing apparatus, comprising: an output unit; and a common bus to which the data recording / reproducing unit, the data input unit, and the data output unit are connected. A data transmission time slot for occupying the bus and transmitting the material data reproduced from the data recording / reproducing unit to the outside, and the data input unit is provided in front of the time slot. A data transfer time slot for recording material data transferred from the master unit in the data recording / reproducing unit by occupying a bus; A time slot is set such that the time slot is different in time for each slave unit, and the data recording / reproducing unit, the data input unit, and the data output unit in the slave unit are controlled according to the time slot. A method for controlling a data recording / reproducing apparatus, comprising: controlling a master device so as to transfer material data to a slave device in accordance with a data transfer time slot of each slave device.