JP2002244893A - Data control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the write-in of data efficiently performable without missing data and make the data read out from saved data surely and efficiently reconstructible in a data control unit. SOLUTION: A write data allocating part 19 executing the control of allocating input image data to each file according to information in a storage medium information storing part 16 and writing in and sectionally storing them within a maximum writing size of each file, when consecutively writing and saving image data of a size exceeding the maximum writing size of each file into a saved data file part 15 having a plurality of files is provided. The writing and allocating part 19, in a writing operation, writes information into a section file information storing part 17, and a read data reconstructing part 20 uses the section file information to reconstruct image data read out from the saved data file part 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously inputting meaningful data which is processed by a series of data streams and has no meaning only in each part of the data, and for storing the data. A plurality of files are provided, and the data exceeding the maximum write size of each file is continuously stored in the file to create storage data, or the created storage data is read and transmitted to the terminal device. And a data control device that performs various controls such as copying to another file and distributing and transmitting to a plurality of terminal devices. It should be noted that image data of a movie or the like has no meaning only in each part of the data, but is processed as a series of data streams and has meaning, and is data to be processed by the present invention.

[0002]

2. Description of the Related Art A conventional example will be described below.

FIG. 13 is a block diagram of a conventional apparatus. This system includes a transmitting device installed in one place and a plurality of receiving devices connected to the transmitting device via a communication line, and the transmitting device responds to a request from the receiving device. It is an example of a system for transmitting arbitrary image data (for example, a video-on-demand system).

The transmitting side device of the system comprises a video reproducing device 1, an image compressing device 2, an automatic image data transmitting device 3 and the like, and the receiving side device comprises a plurality of video terminal devices 10. The image data automatic transmission device 3 includes a CPU 5 for performing various controls in the device, a memory 6 for storing various data, a receiving unit 8 for receiving commands, image data, and the like, and a transmission control for image data. The video terminal device 10 includes an image decompression device 12 that decompresses received image data, a display device 11 that displays decompressed image data as an image, and the like. It is provided.

In this system, an automatic image data transmitting device 3 automatically transmits arbitrary image data (video signal) in response to a request from a user of the video terminal device 10. The operation of transmitting image data in response to a request from the video terminal device 10 is as follows. First, the video reproducing apparatus 1 reproduces, for example, a video tape on which a movie is recorded, and reproduces reproduced image data (including audio data and the like).
Is output.

Thereafter, the image data (image signal) output from the video reproducing apparatus 1 is compressed by the image compressing apparatus 2, and the compressed image data is transferred to the automatic image data transmitting apparatus 3. In the automatic image data transmitting device 3, the receiving unit 8 receives the image data, and the image data (compressed image data) is transmitted through the transmitting unit 7 under the control of the CPU 5.
Is transmitted to the video terminal device 10 that has made the request.

In the video terminal device 10, upon receiving the image data transmitted from the automatic image data transmitting device 3, the image decompressing device 12 decompresses the received image data to restore the original image data. And
The restored image data is transferred to the display device 11 and an image is displayed on a display screen.

As described above, in this system, the image data transmission processing is performed in response to a request from the user of the video terminal apparatus 10, but when transmitting the image data, the video playback apparatus 1 is activated every time the image data is transmitted. It is necessary to reproduce the signal and perform the image compression processing by the image compression device 2. Therefore, the processing time of the image data on the transmission side also becomes longer, and the processing efficiency is poor.

Therefore, the image data that has been reproduced and compressed once is stored in each file of the storage data file unit 15, and the video data is stored in the storage terminal using the image data stored in the storage data file unit 15. It has been considered that the image data is transmitted to the apparatus 10 so that the image data is transmitted efficiently. In this case,
It is necessary to write the stored data to the stored data file unit 15, and it has been considered that the processing is performed as follows.

In order to store image data as described above,
The image data automatic transmission device 3 is provided with a file control unit 21. The file control unit 21 is connected to a file unit 15 for stored data including a plurality of files (file 1, file 2,... File n). I do. Each file is, for example, a magnetic disk device, but is an example in which one magnetic disk device is one file.

In the video reproducing apparatus 1, for example,
As in a movie, each part in image data alone has no meaning, and image data that can be processed meaningfully only after being processed as a series of data streams is continuously output. The image data that has been subjected to the compression processing and compressed is continuously transferred to the image data automatic transmission device 3 (without stopping halfway).

Thereafter, the image data received by the receiving unit 8 is transferred by the file control unit 21 to the stored data file unit 15 in accordance with an instruction from the CPU 5, and the image data is sequentially written into each file. In this case, when the image data exceeding the maximum writing size of each file is continuously written and stored in the file, writing the image data up to the maximum writing size in one file will cause the writing to the file to be completed. Processing stops.

Therefore, for example, an operator or the like issues an instruction (for example, an instruction from the screen of a display device), switches the writing file, and continues writing to a new file. That is, the image data is written up to the maximum write size for each file, and the image data for storage is written while switching the files according to an instruction of an operator or the like.

During this time, image data is continuously transferred from the image compression device 2. For this reason, there is a state in which the writing to the file is stopped even though the image data is continuously input when the file is switched.

[0015]

The above-mentioned prior art has the following problems.

(1): When a large amount of data exceeding the maximum write size of one file is written across a plurality of files, for example, for each data group having a predetermined meaningful group such as a database, If the data can be divided, it is easy to divide the data in advance for each file and to separately write one file for each data after the division.

However, for example, image data that does not have significance only in each part of the image data, such as a movie, and is processed as a series of data streams, can be divided according to the writing size of the file. It was difficult, and it was not possible to write across multiple files without missing data.

(2): For example, each part of the image data, such as a movie, has no meaning but is processed as a series of data streams, and the meaningful image data is continuously output at a certain speed. When the image data is transferred, if the image data is a large amount of data exceeding the maximum writing size of one file, it is necessary to divide and write the image data into a plurality of files.

However, when the image data is continuously transferred without stopping, if the file is switched by an instruction of an operator or the like, the time required for the switching is increased, and the image data transferred at the time of the file switching is increased. Cannot be written to a file, and image data is lost (missing).

(3): Even if the image data compressed by the image compression device is divided and written into the file of the storage data file portion, there is no information at the time of writing the data.
Since the order of the stored images is not known, it is difficult to automatically reproduce the original grouped image data from the stored data.

(4): When a large amount of image data is stored,
The order of processing the divided data in each divided and saved file, such as a database, did not matter. However, when meaningful data is divided and stored for the first time as it is processed as a series of data streams, such as a movie, the order of each data is required, and the order for reconstructing the original raw data at the processing stage When there is no information, it may not be possible to reconstruct the original data.

(5): When a certain series of data streams are stored, and the stored data is read and processed (copied, transmitted, etc.), the conventional technique waits until the writing of the data stream is completed. Then, a method of processing the data that has been completely written has been considered.

However, in this method, other data processing (copying, transmission, etc.) cannot be started until the image data storage processing is completed. It takes a very long time to do so.

The present invention solves the above-mentioned conventional problem. The data that does not have a meaning only in each part of the data, but is processed as a series of data streams, and has a meaning,
When saving data is created by continuously dividing and writing across multiple files, write processing can be performed efficiently without missing data, and reconstruction of data read from saved data It is an object of the present invention to ensure that the operation can be performed reliably and efficiently.

[0025]

FIG. 1 is a diagram illustrating the principle of the present invention. The present invention is configured as follows to achieve the above object.

(1): Input data (compressed data) output from the compressed data generating device 28, that is, data which has no meaning only in each part of the data but is processed as a series of data streams and makes sense. The data control device for controlling the data includes a main control unit 5A, a storage medium information storage unit 16, a divided file information storage unit 17,
Transmission unit 7, reception unit 8, write data distribution unit 1
9, a read data restructuring unit 20, a file control unit 21, and a plurality of files (file 1, file 2,...).
..Saved data file unit 15 having file n)
Was provided.

(2): Each part of the data alone has no meaning, and is processed as a series of data streams to continuously input meaningful data, and a plurality of files for storing the data ( File n,... File n).
What is claimed is: 1. A data control device for continuously storing and storing data exceeding a maximum writing size of each file, wherein a storage medium information storing a storage medium information including a file name of each file and a maximum writing size in advance. Part 1
6 and a write data distribution unit for controlling the input data to be distributed to each of the files based on the storage medium information of the storage medium information storage unit 16, and writing and dividing and storing the data within the maximum write size of each file. 19 is provided.

(3): In the data control device of the above (2), the write data distribution section 19 distributes the data to each file and stores the divided data when dividing and storing the data. And divided file information storage means for storing the divided file information including the writing order in the divided file information storage unit (memory) 17.

(4) In the data control device of (3), the divided data stored in each of the files is based on the divided file information of the divided file information storage unit 17 stored by the divided file information storage means. And a read data reconstructing unit 20 that controls to reconstruct original data.

(5) The data control device of (4) further comprises a transmission unit 7 for transmitting the data reconstructed by the read data restructuring unit 20 to the terminal device instructed.

(6) The data control device of (4), further comprising a copy control unit for controlling the transfer of the data reconstructed by the read data restructuring unit 20 to a file of another device for copying. ing.

(7) The data control device of (4), further comprising a data distribution transmitting unit for transmitting the data reconstructed by the read data reconstructing unit 20 to a plurality of instructed terminal devices while transmitting the data. I have.

(Operation) The operation of the present invention based on the above configuration will be described with reference to FIG.

The operation of the above (1) In the compressed data generating device 28, each part of the data does not have any meaning, but is processed as a series of data streams to make a meaningful data. Transfer to control unit. And in the data control device,
The control of the compressed data is performed as follows.

A) Write Control to Saved Data File Unit 15 The data control unit, after the receiving unit 8 receives the data transferred from the compressed data generation unit 28, controls the main control unit 5A. The data (compressed data) is written to the unit 15. At this time, the write data distribution unit 19 reads the storage medium information stored in the storage medium information storage unit 16 based on the instruction of the main control unit 5A, and reads the first file (for example,
Select file 1) and open the file.

Thereafter, the write data distribution section 19 determines whether or not the data received by the receiving section 8 is present. If there is no received data, the processing is terminated. Is allocated to the corresponding file and transferred to the file unit 15 for saved data via the file control unit 21. Then, the stored data file unit 15 writes the data in a corresponding file.

At this time, the write data distribution unit 19
Adds the size of the written data (initially 0) and stores the added data in an internal memory. Then, based on the storage medium information, the write data distribution unit 19 determines whether or not the data size stored in the memory has been written up to the maximum write size of the file in which the data has been written.

When data is written as much as possible within the maximum write size of one file,
The write data distribution unit 19 stores the divided file information including the file name, the actual write size, and the write order in the divided file information storage unit 17, and closes the file.

Next, the write data distribution unit 19
It is determined whether or not writing to all files has been completed (whether or not data has been written to all the saved data files). If writing to all files has been completed, the process is terminated. If the writing has not been completed, the file is updated, and the above-mentioned writing process is repeated.

B) Reading control of data from the saved data file unit 15 First, when reading control of data from the saved data file is started according to an instruction from the main control unit 5A, the read data restructuring unit 20 The divided file information is read from the divided file information storage unit 17, the first file is selected based on the divided file information, and the file is opened.

Then, data is read from the corresponding file in the stored data file section 15, and the data is read out via the file control section 21 and the data reconstructing section 20 is read out.
Transfer to Next, the read data reconstructing unit 20 reconstructs (restores) the data read from the file based on the divided file information. The data reconstructed in this way is transferred to, for example, the transmitting unit 7 and transmitted to the video terminal device requested by the transmitting unit 7.

On the other hand, in the read data restructuring unit 20,
When the data reconstruction is completed as described above, the read data size is added (initially 0), and the added value is stored in the internal memory. Then, the read data restructuring unit 20 determines whether or not data has been read up to the actual write size based on the divided file information. As a result, if the data has not been read out to the actual size, the above processing is repeated again. That is, data is read continuously from the corresponding file to the actual write size.

When data is read to the actual write size in this way, the read data restructuring unit 20
Closes the file as read completion.
Then, it is determined whether or not data has been read from all the files. If the reading from all the files has not been completed, the file is updated, the file is opened, and the above processing is repeated.

According to the above-mentioned processing, data that is meaningless when processed as a series of data streams is saved by dividing and writing the data continuously over a plurality of files. When creating data, even if the data is continuously input, the writing process can be efficiently performed without missing the data. Also, the reconstruction of the data read from the stored data can be performed reliably and efficiently.

The operation of the above (2) The write data distribution unit 19 reads the storage medium information stored in the storage medium information storage unit 16 and, based on the storage medium information, transfers the input data to each of the files. Automatically sort, write within the maximum write size of each file, and divide and store them continuously.

In this way, a large amount of data that is meaningless when processed as a series of data streams is meaningless because each part of the data alone has no meaning. 15 can be written.

The function of the above (3) is that the divided file information storage means divides the data into the respective files, and stores the divided files including the file name, the actual writing size, and the writing order of each file when storing the divided files. The information is stored in the divided file information storage unit 17. Then, this divided file information is used for data reconstruction at the time of reading. With this configuration, by using the divided file information, when data is read from the stored data file unit 15, the data can be reconstructed (restored) reliably and efficiently.

Operation of the above (4) The storage data file unit 15 is operated by the instruction of the main control unit 5A.
When reading the divided data from the file, the read data restructuring unit 20 reads the divided data stored in each file based on the divided file information in the divided file information storage unit 17 and reconstructs the original data. (Restore).

In this manner, since the divided file information includes the data writing order and the like, if this information is used, the reconstruction of the data read from the stored data file unit 15 can be ensured. , And efficiently. Further, even during the writing to the storage file unit 15, data can be read from any written file and reconstructed.

The operation of the above (5) The stored data file unit 15 is instructed by the main control unit 5A.
When reading the divided data from and transmitting the divided data to the instructed terminal device, the transmitting unit 7 reads the read data reconstructing unit 2
0 transmits the reconstructed data to the designated video terminal 1
Send to 0. In this way, the data can be efficiently transmitted to the requested video terminal device 10 using the divided data stored in the storage data file unit 15.

The operation of the above (6) The stored data file section 15 is instructed by the main control section 5A.
When the divided data is read from the data and copied to another designated file, the copy control unit transfers the data reconstructed by the read data restructuring unit 20 to the designated file for copying and performs control for copying. Do.

In this way, the data can be reliably and efficiently copied to another file while reading and reconstructing the divided data stored in the stored data file section 15.

Operation of the above (7) The storage data file unit 15 is operated by the instruction of the main control unit 5A.
When the divided data is read out from and distributed to the designated terminal devices and transmitted, the data distribution transmission unit distributes the data reconstructed by the read data restructuring unit 20 to the designated terminal devices. While transmitting, control is performed.

In this way, the divided data stored in the stored data file section 15 can be efficiently transmitted to the plurality of video terminal apparatuses 10 while distributing the data.

[0055]

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the example described below
This is an example in which the data control device of the present invention is applied to an automatic image data transmission device.

(Description of Embodiment 1) §1: Description of System and Automatic Image Data Transmission Apparatus
2 and FIG. 3 FIG. 2 is a system configuration diagram 1. FIG. 3 is an explanatory diagram of memory information. FIG. 3A shows a file configuration diagram, FIG. 3B shows storage medium information, and FIG. 3C shows divided file information.

This system automatically transmits an arbitrary image signal (for example, moving image data including audio data of a movie or the like) in response to a request from a user of the video terminal device (the system of the related art described above). The same). In this system, a video reproducing device 1 is provided on the image data transmitting side.
, An image compression device 2, and an automatic image data transmission device 3, and a video terminal device 10 (a plurality of video terminals) is provided on the receiving side. The transmitting device and the receiving device are connected by a communication line.

The automatic image data transmitting apparatus 3 includes a CPU 5, a storage medium information storage section 16, a divided file information storage section 17, a transmission section 7, a reception section 8, a write data distribution section 19, a read data reconstruction section. 20 and a file control unit 21 are provided.
Is connected to the saved data file unit 15. Also, the video terminal device 10 includes an image decompression device 12,
A display device 11 and the like are provided.

The functions and the like of each unit are as follows.

(1): The video reproducing apparatus 1 outputs image data (for example, moving image data including an audio signal or the like) by performing a reproducing operation of a video signal recording medium such as a video tape recorder or a video disk. Things. Note that an example of the image data is reproduced moving image data of a movie or the like.

(2) The image compression device 2 is a device that compresses image data output from the video reproduction device 1 to generate compressed image data (hereinafter, also simply referred to as “image data”). The image data compressed by the image compression device 2 is transferred to the automatic image data transmission device 3.

(3): The image data automatic transmission device 3 inputs the image data transferred from the image compression device 2,
It performs transmission processing to the video terminal device 10. The automatic image data transmitting apparatus 3 performs processing such as writing of stored data in the stored data file section 15 and copying to another file using the stored data. In the automatic image data transmitting apparatus 3, processing is performed on compressed image data.

(4): The video terminal device 10 is a device installed on the user side, and receives the image data transmitted from the automatic image data transmitting device 3 and performs a process of reproducing the image data. Also, this video terminal device 10
A request for transmitting image data can be issued to the automatic image data transmitting device 3.

(5): The CPU 5 performs various controls in the automatic image data transmission device 3 (eg, control of writing and reading of image data).

(6) The storage medium information storage section 16 is a memory for storing storage medium information in advance. The information stored in the storage medium information storage unit 16 is the information shown in FIG. 3B, for example, file names (F1, F2,...).
·), Maximum write size (MAX1, MAX2, ···)
·), Corresponding MD information (MD1, MD2, ...) (M
D: magnetic disk device).

(7): The divided file information storage section 17 is a memory in which the write data distribution section 19 writes the divided file information when performing the write processing of the stored data. The divided file information includes, for example, a file name (F1, F2,...), An actual writing size (WS1, WS2,...), And a writing order (1, 2,.・ ・) Etc.

(8): The transmission section 7 controls transmission of image data to the video terminal apparatus 10 in accordance with an instruction from the CPU 5.

(9): The receiving section 8 receives the image data (compressed image data) transferred from the image compression apparatus 2.

(10): The write data distribution unit 19
When writing image data for storage to the file unit 15 for storage data, the image data is allocated to each file, and control is performed for dividing and writing the image data. Further, when writing the storage data, the write data distribution unit 19 stores the divided file information in the divided file information storage unit 17.

(11): The read data restructuring unit 20 reads the divided data stored in the stored data file unit 15 based on the divided file information stored in the divided file information storage unit 17 when reading the divided data. , Reconstructing image data (processing for restoring the image data in the original order).

(12) The file control unit 21 performs various controls (write / read control, etc.) on the saved data file unit 15.

(13): The storage data file section 15 is composed of a plurality of magnetic disk devices MD1, MD2,... MDn, and divides the storage data into magnetic disks (storage media) of each magnetic disk device. What to store. In this example, the storage medium of each magnetic disk device is treated as one file.

(14) The image decompression device 12 performs a process of decompressing received image data (compressed image data) to restore the original image data.

(15) The display device 11 displays the image data expanded by the image expansion device 12 as an image on a screen.

§2: Outline of processing (1): Outline of processing at the time of real-time transmission of image data The operation of transmitting image data in response to a request from the video terminal device 10 is as follows. First, the video reproducing apparatus 1 reproduces, for example, a video tape or a video disk on which a movie is recorded, and outputs reproduced image data. Thereafter, the image signal output from the video playback device 1 is compressed by the image compression device 2, and the image data (compressed image data) is continuously transferred from the image compression device 2 to the automatic image data transmission device 3.

In the automatic image data transmitting device 3, the receiving unit 8
Receives image data from the image compression device 2,
The image data (compressed image data) received via the transmission unit 7 under the control of U5 is transmitted. Video terminal device 1
In the case of 0, when the image data transmitted from the automatic image data transmitting device 3 is received, the image decompressing device 12 decompresses the received image data and restores the original image data. Then, the restored image data is sent to the display device 11 to display the image on the screen.

(2): Outline of write control to stored data file unit 15 The image data automatic transmission device 3 is controlled by the CPU 5 after the reception unit 8 receives the image data transferred from the image compression device 2. The image data is written to the storage data file unit 15. At this time, the write data distribution unit 19 reads the storage medium information stored in the storage medium information storage unit 16 based on the instruction of the CPU 5, and reads the first file (for example, file 1) from the storage medium information.
Select to open the file.

Thereafter, the write data distribution unit 19 determines whether or not the image data received by the reception unit 8 exists.
If there is no received image data, the process is terminated. However, if there is received image data, the received image data is distributed to the corresponding file and transferred to the file unit 15 for saved data via the file control unit 21. Then, the storage data file unit 15 writes the image data in a corresponding file.

At this time, the write data distribution unit 19
Adds the size of the written image data (initially 0) and stores the added data in an internal memory. Then, based on the storage medium information, the write data distribution unit 19 determines whether the data size stored in the memory has been written to the maximum write size of the file in which the image data has been written.

When the image data is written as much as possible within the maximum write size of one file, the write data distribution unit 19 stores the file name, the actual write size, and the write Stores the split file information including the order, and closes the file.

Next, the write data distribution unit 19
It is determined whether or not writing to all files has been completed (whether or not data has been written to all the saved data files). If writing to all files has been completed, the process is terminated. If the writing has not been completed, the file is updated, and the above-mentioned writing process is repeated.

(3): Overview of Control of Reading Image Data from Saved Data File Unit 15 First, when the control of reading image data from the saved data file unit 15 is started by an instruction from the CPU 5, the readout data is re-read. The construction unit 20 stores the divided file information storage unit 17
And reads the divided file information, selects the first file based on the divided file information, and opens the file.

Then, the image data is read from the corresponding file in the stored data file unit 15 and the image data is transferred to the read data restructuring unit 20 via the file control unit 21. Next, the read data restructuring unit 2
0 reconstructs (restores the original image data) the image data read from the file based on the divided file information. The image data reconstructed in this way is transferred to, for example, the transmission unit 7 and transmitted to the video terminal device requested by the transmission unit 7.

On the other hand, the read data restructuring unit 20
When the reconstruction of the image data is completed as described above, the read data size is added (initially 0), and the added value is stored in the internal memory. Then, the read data restructuring unit 20 determines whether or not data has been read up to the actual write size based on the divided file information. As a result, if the data has not been read out to the actual size, the above processing is repeated again. That is, data is read continuously from the corresponding file to the actual write size.

When the image data is read out to the actual write size in this way, the read data restructuring unit 20 closes the file as reading is completed. Then, it is determined whether or not data has been read from all the files. If the reading from all the files has not been completed, the file is updated, the file is opened, and the above processing is repeated.

According to the above processing, data that is meaningless only in each part of the data and that can be processed as a series of data streams and has meaningful processing is continuously divided across a plurality of files. When creating stored data by writing data, even if image data is continuously input, the writing process can be performed efficiently without missing data. Also, the reconstruction of the data read from the stored data can be performed reliably and efficiently.

§3: Description of Save Data Division Write Process—See FIG. 4 FIG. 4 is a flowchart of the save data write process.
Hereinafter, the stored data writing process will be described with reference to FIG. In addition, S11 to S19 indicate each processing step. This process is a process in a case where image data reproduced by the video reproducing device 1 is compressed by the image compressing device 2 and continuously transferred to the automatic image data transmitting device 3.

In this case, in the automatic image data transmitting device 3, after the receiving section 8 receives the compressed image data, the receiving section 8 sequentially performs a writing process to the file section 15 for the stored data.
First, based on an instruction from the CPU 5, the write data distribution unit 19 reads storage medium information stored in the storage medium information storage unit 16 (S11). Then, the write data distribution unit 19 selects the first file (for example, file 1) from the storage medium information and opens the file (S12).

Thereafter, the write data distribution unit 19 determines whether there is image data received by the reception unit 8 (S13). If there is no image data received, the process ends. If so, the received image data is sorted into the corresponding file (file 1 at first) and transferred to the saved data file unit 15 via the file control unit 21. Then, the saved data file unit 1
In 5, the image data is written to the corresponding file (S14).

At this time, the write data distribution unit 19
Adds the size (data length) of the written image data (initially 0) and stores the added data (data size of the image data) in an internal memory (S15). Then, based on the storage medium information, the write data distribution unit 19 determines whether the data size stored in the memory has been written up to the maximum write size of the file in which the image data has been written (S16).

As a result, when the file has not been written up to the maximum write size, the process is repeated from the step S13 again. After the image data is written up to the maximum write size of one file (file 1 at first) in this way, the write data distribution unit 19
Stores the divided file information in the divided file information storage unit 17 and closes the file (S17).

The divided file information in this case includes a file name, an actual writing size, a writing order, and the like. When writing to one file is completed, the write data distribution unit 19 sends a write completion notification to the CPU 5.

Next, the write data distribution unit 19
It is determined whether or not writing to all files has been completed (whether or not data has been written to all the saved data file portions) (S18). If writing to all files has been completed, the process ends. If the writing to all the files has not been completed, the file is updated (to a different file name) (S19), and the process is repeated from the process of S13.

§4: Description of stored data read / transmission processing (after completion of writing of stored data) —see FIG. 5 FIG. 5 is a flowchart 1 of stored data read / transmission processing
(After the end of writing the stored data). Hereinafter, the stored data read / transmit processing (after the end of the stored data writing) will be described with reference to FIG. In addition, S21 to S28 indicate each processing step. After the process of writing the image data to the storage data file unit 15 is completed, the process of reading the divided data from the storage data file unit 15 and transmitting the divided data to the video terminal device 10 is as follows.

First, when the process of reading the divided data from the saved data file unit 15 is started according to an instruction from the CPU 5, the read data restructuring unit 20 reads the divided file information from the divided file information storage unit 17 (S
21). Then, the read data restructuring unit 20 selects the first file based on the divided file information and opens the file (S22).

The image data read from the corresponding file in the stored data file section 15 is transferred to the read data reconstructing section 20 via the file control section 21. The read data reconstructing unit 20 reconstructs the data read from the file based on the divided file information (restores the divided compressed image data in the original order).
Then, the data is transferred to the transmission unit 7. Upon receiving the data, the transmitting unit 7 transmits the data (compressed image data) to the video terminal device 10 that has requested (S23).

When the video terminal apparatus 10 receives the image data transmitted from the automatic image data transmission apparatus 3, it expands the image data by the image expansion apparatus 12 and restores the original image data. Thereafter, the restored image data is transferred to the display device 11, and the image is displayed on the screen.

On the other hand, in the read data restructuring unit 20,
After the image is transferred to the transmission unit 7 as described above, the read data size is added (initially 0), and the added value is stored in the internal memory (S24). Then, the read data restructuring unit 20 determines whether or not the data has been read up to the actual write size based on the divided file information (S25). As a result, when the data is not read out to the actual size, the processing is repeated from the processing of S23 again. That is, the data is continuously read from the corresponding file to the actual write size.

When the image data is read out to the actual write size in this way, the read data restructuring unit 20 closes the file as reading is completed (S26). Then, it is determined whether or not data has been read from all files (S27). If reading from all files has not been completed, the file is updated (switched to another file) and the file is opened. (S28), and the process is repeated from the process of S23.

§5: Description of stored data read / transmission processing flow chart 2 (during writing of stored data) —see FIG. 6 FIG. 6 shows stored data read / transmission processing flow chart 2
(Writing stored data). Hereinafter, the stored data reading / transmitting process (during the writing of the stored data) will be described with reference to FIG. In addition, S31 to S37 indicate each processing step. This processing is performed in the storage data file unit 15.
This is an example of processing in a case where image data is sequentially read from a file for which writing has been completed during writing processing to the video terminal device and transmitted to the video terminal device 10.

As described above, the compressed image data is continuously output from the image compression device 2, and the image data is sequentially written into the storage data file unit 15 at an arbitrary timing during the sequential writing. The image data is sequentially read from the file in which the writing has been completed, and the data is transmitted to the video terminal device 10.

In this case, the read data restructuring unit 20
Determines the start of the divided data reading process according to the instruction from the CPU 5 to determine whether or not there has been a data write end notification from the write data distribution unit 19 (S3).
1). In this case, the data write end notification is sent from the write data distribution unit 19 to the CPU 5, so the read data restructuring unit 20 determines whether there is a data write end notification based on information from the CPU 5.

As a result, if there is no data write end notification, the process waits as it is, and if there is a data write end notification, data reading from the file is started.
At this time, first, the read data restructuring unit 20 reads the divided file information from the divided file information storage unit 17, and
The corresponding file is opened (S32).

The image data read from the corresponding file in the stored data file section 15 is transferred to the read data reconstructing section 20 via the file control section 21 (S33). The read data reconstructing unit 20 reconstructs the data read from the file based on the divided file information (restores the divided compressed image data in the original order) and transfers the data to the transmitting unit 7. Upon receiving the data, the transmitting unit 7 transmits the data (compressed image data) to the video terminal device 10 (S34).

In the video terminal device 10, upon receiving the image data transmitted from the automatic image data transmitting device 3, the video data is expanded by the image expanding device 12 to restore the original image data. Thereafter, the restored image data is transferred to the display device 11, and the image is displayed on the screen.

On the other hand, in the read data restructuring unit 20,
After the image is transferred to the transmission unit 7 as described above, the read data size is added (initially 0), and the added value is stored in the internal memory (S35). Then, the read data restructuring unit 20 determines whether data has been read up to the actual write size based on the divided file information (S36). As a result, when the data is not read out to the actual size, the processing is repeated from the processing in S33 again. That is, data is read continuously from the corresponding file to the actual write size.

After reading the image data up to the actual write size in this way, the read data restructuring unit 20 closes the file as reading is completed (S37). Then, the process is repeated from the process of S31.

(Description of Embodiment 2) §1: Description of System Configuration—See FIG. 7 FIG. 7 is a system configuration diagram 2. In this example, a personal computer (hereinafter referred to as "PC") 25 is connected to the automatic image data transmitting apparatus 3, and the PC (PC) 25 copies image data to files A, B,. This is an example of (copying). The files A, B,... M are connected to the personal computer 25 and can be written / read by the personal computer 25 (magnetic disk device).

In this case, the image data automatic transmission device 3 includes the CPU 5, the storage medium information storage unit 16, the divided file information storage unit 17, the copy control unit 26, the reception unit 8, the write data distribution unit 19, and the read data reconstruction. Part 20,
A file control unit 21 and the like are provided. The file control unit 21 is connected to a file unit 15 for stored data. The copy control unit 26 has a personal computer (PC).
25 are connected, and files A, B
... M is provided.

The copy controller 26 controls the transmission (transmission) of copy data to the personal computer 25 in accordance with an instruction from the CPU 5. Further, the personal computer 25 is provided with the copy control unit 2.
The image data transferred from the PC 6 is received, and the received data is stored (written) in the files A to M provided in the personal computer 25. The other configuration is the same as the device shown in FIG.

§2: Description of Saved Data Copying Process (After Saving Data Writing is Completed) —See FIG. 8 FIG. 8 is a flowchart 1 of the saved data copying process (after saving data writing is completed). Hereinafter, the stored data copying process (after the writing of the stored data is completed) will be described with reference to FIG. In addition, S41 to S48 indicate each processing step.

First, when the reading process of the divided data is started according to an instruction from the CPU 5, the read data reconstructing unit 20 reads the divided file information from the divided file information storage unit 17 (S41). Then, the read data restructuring unit 20 selects the first file based on the divided file information and opens the file (S42).

The image data read from the corresponding file in the stored data file section 15 is transferred to the read data reconstructing section 20 via the file control section 21. The read data reconstructing unit 20 reconstructs (restores data in the original order) the data read from the file based on the divided file information and transfers the data to the copy control unit 26. Upon receiving the image data, the copy control unit 26 transfers (transmits) the image data (compressed image data) to the personal computer 25 (S43).

When the personal computer 25 receives the image data transferred from the automatic image data transmitting device 3, the personal computer 25 copies the image data into a copy data file. On the other hand, the read data reconstructing unit 20 adds the read data size (initially 0) after transferring the image data to the copy control unit 26 as described above, and stores the added value in the internal memory ( S44).

Then, the read data restructuring unit 20
Based on the divided file information, it is determined whether or not data has been read up to the actual write size (S45). As a result, when the data is not read out to the actual size, the processing is repeated from the processing of S43 again. That is, data is read continuously from the corresponding file to the actual write size.

When the image data is read out to the actual write size in this way, the read data restructuring unit 20 closes the file as reading is completed (S46). Then, it is determined whether data has been read from all files (S47). If reading from all files has not been completed, the file is updated (switched to another file) and the file is opened. (S48), the process is repeated from the process of S23.

§3: Description of Saved Data Copying Process (During Writing of Saved Data) —See FIG. 9 FIG. 9 is a flowchart 2 of the saved data copying process (during writing of saved data). Hereinafter, the stored data copying process (while the stored data is being written) will be described with reference to FIG. In addition, S51 to S57 indicate each processing step.

This process is a process of copying stored data from a file for which writing has been completed to another file while image data output from the image compression device 2 is being continuously written to the stored data file unit 15. in this case,
The process of writing the image data into the storage data file unit 15 is performed in the same manner as described above.

First, the read data reconstructing unit 20
It is determined whether or not there is a data write end notification based on the information from the PU 5 (S51). Then, when there is a data write notification, the read data restructuring unit 20 reads the divided file information from the divided file information storage unit 17, and opens the file for which writing has been completed (S52).

Next, the file control unit 21 reads out the image data from the file in which the writing has been completed in the storage data file unit 15 according to the instruction of the CPU 5, and transfers it to the read data restructuring unit 20 (S53). The read data reconstructing unit 20 reconstructs the read image data based on the divided file information and transfers the reconstructed image data to the copy control unit 26. Upon receiving the image data, the copy control unit 26 transfers the image data to the personal computer 25.

Upon receiving the image data transferred from the copy control unit 26, the personal computer 25 copies the image data into a copy data file (S54). On the other hand, the read data restructuring unit 20 adds the read data size (0 at first) after the end of the read data reconstructing process,
The sum is stored in an internal memory (S55).

Then, the read data restructuring unit 20 determines whether or not the image data has been read to the actual write size based on the divided file information (S56), and the image data has not been read to the actual write size. For example, the process is repeated from the process of S53.

After reading the image data up to the actual write size as described above, the read data restructuring unit 20 closes the read-out file (S5).
7), the processing is repeated from the processing of S51.

(Explanation of Embodiment 3) §1: Description of System Configuration—See FIG. 10 FIG. This system comprises a video reproducing apparatus 1, an image compressing apparatus 2, an automatic image data transmitting apparatus 3, and a plurality of video terminal apparatuses 10 connected to the automatic image data transmitting apparatus 3 via a communication line.
-1, 10-2,..., 10-n.

The automatic image data transmitting apparatus 3 includes a CPU 5, a storage medium information storage section 16, a divided file information storage section 17, a data distribution transmission section 27, a reception section 8, a write data distribution section 19, and a read data retransmission section. A construction unit 20, a file control unit 21 and the like are provided. The file control unit 21 is connected to a file unit 15 for stored data.

The data distribution transmission unit 27 controls distribution of output data (compressed image data) to each of the video terminal devices 10-1, 10-2,..., 10-n.
The video terminal devices 10-1, 10-2,...
10-n are the same as those of the video terminal device 10 shown in FIG. 2, and are each provided with a data decompression device 12, a display device 11, and the like. The other configuration is shown in FIG.
The system is the same.

§2: Description of stored data read / distribution transmission processing (after completion of writing of storage data) —see FIG. 11 FIG. 11 is a flowchart 1 of the storage data reading / distribution transmission processing (after completion of writing of storage data). Hereinafter, the stored data read / distribution transmission process (after the completion of the stored data writing) will be described with reference to FIG. In addition, S61-
S68 shows each processing step.

First, when the reading process of the divided data is started according to the instruction of the CPU 5, the read data reconstructing unit 20 reads the divided file information from the divided file information storage unit 17 (S61). Then, the read data restructuring unit 20 selects the first file based on the divided file information and opens the file (S62).

Then, the image data read from the corresponding file in the stored data file section 15 is transferred to the read data reconstructing section 20 via the file control section 21. The read data reconstructing unit 20 reconstructs the data read from the file based on the divided file information, and transfers the data to the data distribution transmitting unit 27. Upon receiving the data, the data distribution transmission unit 27 transmits the image data (compressed image data) to the video terminal device that has requested (S63).

In this case, for example, the video terminal device 10-
If there is a request from 1 and 10-2, the data distribution transmitting unit 27
Distributes and transmits image data to the two video terminals 10-1 and 10-2. In the video terminal device that has received the image data transmitted from the automatic image data transmission device 3, the image data is expanded by the data expansion device 12, and the image is displayed on the screen of the display device 11.

On the other hand, in the read data restructuring unit 20,
After the image is transferred to the transmission unit 7 as described above, the read data size is added (initially 0), and the added value is stored in the internal memory (S64). Then, the read data restructuring unit 20 determines whether or not the data has been read up to the actual write size based on the divided file information (S65).

As a result, if the data has not been read out to the actual size, the processing is repeated from the processing in S63. That is, the data is continuously read from the corresponding file to the actual write size. After reading the image data up to the actual writing size in this way, the read data restructuring unit 20 closes the file as reading is completed (S66).

Then, it is determined whether or not data has been read from all files (S67). If reading from all files has not been completed, the file is updated (switched to another file). The file is opened (S68), and the process is repeated from the process of S63.

§3: Description of stored data read / distribution transmission processing (during writing of stored data) —see FIG. 12 FIG. 12 is a flowchart 2 of stored data reading / distribution transmission processing (during writing of stored data). Hereinafter, FIG.
The storage data readout / distribution transmission process (during storage data writing) will be described based on the following. In addition, S71 to S77 indicate each processing step.

In this process, the image data transferred from the image compression device 2 is continuously written to the storage data file unit 15, and during the writing, the storage data is read out from the file for which writing has been completed, and the data is transferred to a plurality of files. This is an example of distribution to video terminal devices. In this case, the process of writing the image data into the storage data file unit 15 is performed in the same manner as described above.

First, the read data reconstructing unit 20
It is determined whether or not there is a data write end notification based on the information from the PU 5 (S71). Then, when there is a data write notification, the read data restructuring unit 20 reads the divided file information from the divided file information storage unit 17, and opens the file for which writing has been completed (S72).

Next, the file control unit 21 reads out the image data from the file in which the writing has been completed in the storage data file unit 15 according to the instruction of the CPU 5, and transfers it to the read data restructuring unit 20 (S73). The read data reconstructing unit 20 reconstructs the read image data based on the divided file information and transfers the reconstructed image data to the data distribution transmitting unit 27. Upon receiving the image data, the data distribution transmission unit 27 distributes and transmits the image data to the video terminal device that has requested the image data.

In the video terminal device that has received the image data transmitted from the automatic image data transmission device 3, the image data received by the data decompression device 12 is decompressed, and the image data is displayed as an image on the screen of the display device 11. (S74). On the other hand, the read data restructuring unit 2
When the read data reconstructing process is completed, 0 is added to the read data size (initially 0), and the added value is stored in the internal memory (S75).

Then, the read data restructuring section 20 determines whether or not the image data has been read up to the actual write size based on the divided file information (S76), and the image data has not been read up to the actual write size. For example, the process is repeated from the process of S73.

After reading the image data up to the actual write size as described above, the read data restructuring unit 20 closes the read file (S7).
7), the process is repeated from the process of S71.

(Other Embodiments) The embodiments have been described above, but the present invention can be implemented as follows.

(1): Not limited to the image data automatic transmission device,
It is applicable to other similar image data control devices.

(2) The storage data file section is not limited to a magnetic disk device, but can be applied to other similar devices, for example, a magneto-optical disk device.

(3): After writing the compressed image data to all the files (all disks) in the file section for the stored data, it is also possible to overwrite the first written area. If the above processing is performed in this manner, a series of processing including compression of image data → division writing to a file → reading of divided image data → decompression of image data → various processing (display, etc.) of image data can be performed in a long time. It can be performed continuously over time.

(4): Not limited to the image data described in the above embodiment, only each part in the data has no meaning.
It is equally applicable to other similar data that makes sense when processed as a series of data streams, such as voice data, character data, and the like.

[0146]

As described above, the present invention has the following effects.

(1): Each part of the data alone has no meaning, and if data that is processed as a series of data streams and makes sense is input continuously, based on the storage medium information stored in advance, By dividing the input data into a plurality of files and writing the divided data, it is possible to efficiently write the storage data without missing any data.

(2): When writing the data for storage to a file, the divided file information is stored in the memory, so that the data read from the file part for stored data can be re-used by using the divided file information. Construction (processing of connecting and restoring data in the original order) can be performed reliably and efficiently.

(3): Continuously generated data can be written in real time to the file section for stored data based on the storage medium information. Therefore, the process of writing large-size data such as moving data can be performed automatically at low cost and without missing data.

(4): Since divided file information is stored in the memory at the time of writing data, the use of the divided file information makes it possible to easily manage a long data stream.

(5): Even while data for storage is being written to a file, data can be read from the file for which writing has been completed. By performing data writing and reading in parallel, It is possible to perform efficient data control.

In addition to the above effects, the following effects are provided corresponding to each claim.

(6): In claim 1, the write data distribution unit reads the storage medium information stored in the storage medium information storage unit, and based on the storage medium information, writes the input data to each of the files. Control for automatically sorting, writing within the maximum writing size of each file, and dividing and storing can be performed continuously.

In this way, a large amount of data that is meaningless when processed as a series of data streams is meaningless because each part in the data alone has no meaning. Can be written to.

(7): In claim 2, the divided file information storage means distributes the data to each file, and stores the divided file including the file name, the actual writing size, and the writing order of each file when storing the divided data. The file information is stored in the divided file information storage. Then, the divided file information can be used for data reconstruction at the time of reading.

In this way, by using the divided file information, the data can be reconstructed (restored in the original order) reliably when read from the stored data file section.
And can be performed efficiently.

(8): In the third aspect, when reading out the divided data from the saved data file section in accordance with the instruction of the main control section, the read data reconstructing section reads the divided file information of the divided file information storage section. Based on this, it is possible to read the divided data stored in each of the files and control to reconstruct the original data.

In this way, since the divided file information includes the data writing order and the like, if this information is used, the reconstruction of the data read from the saved data file portion can be ensured. And can be performed efficiently. In addition, even while data for storage is being written to a file, data can be read from the file for which writing has been completed. By performing data writing and reading in parallel, efficient data Control can be performed.

(9): In claim 4, when reading the divided data from the stored data file section in accordance with the instruction of the main control section and transmitting the divided data to the instructed terminal device, the transmitting section includes the read data reconstructing section. Sends the reconstructed data to the specified terminal device.

In this way, the data can be efficiently transmitted to the requesting terminal device by using the divided data stored in the storage data file section.

(10) According to the fifth aspect, when the divided data is read from the saved data file section in accordance with the instruction of the main control section and copied to another specified file, the copy control section reconstructs the read data. The copy unit transfers the reconstructed data to the designated copy file and controls the copying.

In this way, the data can be reliably and efficiently copied to another file while reading and reconstructing the divided data stored in the stored data file section.

(11) According to the sixth aspect, when the divided data is read from the stored data file unit in accordance with the instruction of the main control unit and distributed and transmitted to a plurality of specified terminal devices, the data distribution transmitting unit is used. Performs control to transmit the data reconstructed by the read data reconstructing unit to a plurality of terminal devices while being instructed and transmitting the data.

In this way, data can be efficiently distributed and transmitted to a plurality of terminal devices using the divided data stored in the stored data file section.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a system configuration diagram 1 in the embodiment.

FIG. 3 is an explanatory diagram of memory information according to the embodiment;

FIG. 4 is a flowchart of a stored data writing process according to the embodiment.

FIG. 5 is a flowchart 1 of a stored data reading / transmitting process (after storing data writing is completed) according to the embodiment;

FIG. 6 is a flowchart 2 of stored data read / transmission processing (during writing of stored data) in the embodiment.

FIG. 7 is a system configuration diagram 2 in the embodiment.

FIG. 8 is a flowchart 1 of a saved data copying process (after saving data writing is completed) in the embodiment;

FIG. 9 is a flowchart 2 of stored data copying processing (during writing of stored data) in the embodiment.

FIG. 10 is a system configuration diagram 3 in the embodiment.

FIG. 11 is a flowchart 1 of a storage data read / distribution transmission process (after storage data writing is completed) according to the embodiment;

FIG. 12 is a flowchart 2 of a stored data read / distribution transmission process according to the embodiment (while the stored data is being written);
It is.

FIG. 13 is a configuration diagram of a conventional apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 video playback device 2 image compression device 3 automatic image data transmission device 5 CPU (central processing unit) 5A main control unit 7 transmission unit 8 reception unit 10 video terminal device 11 display device 12 image decompression device 15 file unit for saved data 16 Storage medium information storage unit 17 Divided file information storage unit 19 Write data distribution unit 20 Read data reconstruction unit 21 File control unit 26 Copy control unit 27 Data distribution transmission unit

Claims (14)

[Claims] 1. A data control device, comprising: means for inputting data to be processed as a series of data streams, distributing the data to a plurality of files, and storing the data; distributing the data to a plurality of files; ,
Means for creating divided file information that is independent of the plurality of files and specifies each file and the writing order. 2. The data control device according to claim 1, wherein the divided file information includes a file name of each file and a writing order. 3. The data control device according to claim 1, wherein the distribution of the data is performed based on a maximum size of a file. 4. The data control according to claim 1, further comprising means for reading data from the plurality of files in order based on the divided file information and performing control for reconstructing original data. apparatus. 5. The data control device according to claim 4, further comprising means for transmitting the reconstructed data to a designated terminal device. 6. The data control device according to claim 4, further comprising means for controlling transfer of the reconstructed data to a file of another device for copying. 7. The data control device according to claim 4, further comprising means for transmitting the reconstructed data while distributing the reconstructed data to a plurality of designated terminal devices. 8. A data control method comprising: inputting data to be processed as a series of data streams, storing the data in a plurality of files, and storing the data in a plurality of files.
A data control method, which is independent of the plurality of files and creates divided file information for specifying the position of data allocated to each file and each file in the data stream. 9. The data control method according to claim 8, wherein the divided file information includes a file name of each file storing each data and a writing order. 10. The data control method according to claim 8, wherein the distribution of the data is performed based on a maximum size of a file. 11. The data control method according to claim 8, wherein data is sequentially read from the plurality of files based on the divided file information, and control for reconstructing original data is performed. 12. The data control method according to claim 11, further comprising means for transmitting the reconstructed data to a designated terminal device. 13. The data control method according to claim 11, further comprising means for controlling transfer of the reconstructed data to a file of another device for copying. 14. The data control method according to claim 11, further comprising means for transmitting the reconstructed data while distributing the reconstructed data to a plurality of designated terminal devices.