JP4043800B2 - Video archiving device and multimedia archiving device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distributed data archiving system and a network terminal device having a function of storing data downloaded from the Internet or the like in a plurality of data storage locations existing on a network.
[0002]
[Prior art]
Currently, there is a service for downloading content data such as music data to a user's computer or the like through the Internet. However, since the moving image / sound data has a large data size, the user cannot store a large amount of download contents on his / her computer or the like beyond the limitation of the hard disk capacity of his / her computer or the like.
[0003]
BS digital broadcasting has started, and devices that can record TV programs in the form of digital data without worrying about image quality deterioration have come to the market. Recording data is recorded and stored on a video tape or the like, but if the number of recordings increases, it becomes difficult to secure a storage location for the video tape, and management becomes complicated.
[0004]
On the other hand, International Publication No. WO 01/46808 A1 “Distributed Data Archive Device and System” has been filed by the same applicant as the present application as a valuable digital data backup technology. In WO 01/46808 A1, portable recording medium reading / writing means, authentication means, split encryption means for dividing and encrypting target data to be stored, decryption integration means for performing the reverse process, and storage data A data archiving apparatus comprising a data management means for managing the network and a network communication means, wherein the target digital is stored in accordance with data storage location information and data storage procedure information held by the portable recording medium. The data is divided into a plurality of servers on the network and stored, and the data is divided into a plurality of servers on the network according to the data storage location information and the data storage procedure information held by the portable recording medium. A distributed data archiving device is disclosed that decrypts and synthesizes the target data stored and provides it to users. There.
[0005]
In WO 01/46808 A1, data storage location information and data storage procedure information relating to storage data are recorded in a predetermined location in the apparatus or in a portable recording medium such as an IC card. In the latter case, with this portable recording medium, it is possible to access the stored data on a distributed data archiving device different from the distributed data archiving device used when storing the data. is there.
[0006]
However, WO 01/46808 A1 was invented as a device or system for the purpose of solving a general data storage problem, and has a large amount of video or multimedia content data that is expected to be used in the future. This is not intended for the case of private storage and management.
[0007]
[Problems to be solved by the invention]
The present invention has been made in consideration of such problems, and enables large-capacity data such as video data that a user wants to store to be distributed and stored on a network in a safe form. It is an object to provide an apparatus.
[0008]
[Means for Solving the Problems]
  A first invention for solving the above-mentioned problems is a video archiving apparatus characterized in that digital moving image data can be stored and managed in a plurality of servers on a network. A video signal recording unit that inputs a signal and records it as a digital video data in a recording device such as a hard disk, a recording device that records the digital video data created by the video signal recording unit, and a digital video data recorded in the recording device. A distributed archive processing unit that divides the data into a plurality of parts, stores the data in a plurality of servers on the network, retrieves the stored data through the network, and restores the original state on the recording device; and the digital on the recording device A network that interfaces between a video signal playback unit that plays back and displays video data and a network An over-click interface,
  The distributed archive processing unit includes a dividing unit that divides the digital video data to be stored into a plurality of parts, an integrated restoration unit that restores the divided and stored data to the original single data file, and data that stores the stored data. Record data storage procedure information that records the data storage location and the method of dividing the data to be stored when newly storing data, as well as network communication means for transferring data files using a communication protocol defined with the server. Data management means, and
  The data management means is data that is stored in a distributed manner under the management folder that includes the data storage location and the data storage procedure information, or the management folder in which only one information exists for each user to access the management data. Record in a folder prepared for each fileIt is characterized by this.
[0009]
  Due to the function of the distributed archive processing unit, there is no need to record and store a large amount of data such as video data on an external recording medium such as a magnetic tape. Nor.Moreover, if data is divided and stored in a plurality of servers, it is difficult to steal valuable data. According to the data storage location information and data storage procedure information recorded in the built-in memory device, the video archive device divides and transfers the target digital data to a plurality of servers on the network for each divided portion. In accordance with the recorded data storage location information and data storage procedure information, the target data that is divided and stored in a plurality of servers on the network is extracted, combined, and restored to the original file. By providing it to the user, a large amount of data can be stored without being restricted by the storage capacity of the video archive device installed at home. In addition to the data file to be stored, the contents of the management data of the data file are recorded in a data server on the network. Thus, the merit of the method of recording the contents of the management data indirectly is that the storage space of the management folder for each user can be saved.
[0012]
By specifying a storage data file in which data storage location information and data storage procedure information are recorded, the user can always retrieve the stored data from the network, restore it to the original data, and reproduce it.
[0013]
Further, the dividing means can divide and encrypt the target data, or can create a plurality of divided data to be divided and stored after the encryption. The data management means The encryption key information or the like necessary for decryption is recorded in the data storage procedure information, and the integrated restoration unit decrypts the stored divided data according to the data storage procedure information and integrates the data or If the video archiving apparatus is configured so that the original data is restored after being integrated into the original data, a more powerful effect is obtained.
[0014]
If each piece of divided data is encrypted, it is difficult to know the original data, and even if the data is stored on an open network such as the Internet, there is virtually no fear of being stolen when the data is retrieved. . Therefore, personal images recorded with a digital video camera can be safely archived.
[0015]
Further, the dividing means can add the dummy data according to a certain rule before or after dividing the target data after the data is divided or divided, or after being encrypted, and the data management means The dummy data addition rule is recorded in the data storage procedure information, and the integrated restoration means integrates or decrypts the stored divided data according to the data storage procedure information, and then integrates or integrates the divided data. If the dummy data is removed before or after decryption, the data will be stolen and will not be completely restored even if it is decrypted. It has a more powerful effect.
[0016]
Furthermore, by storing the divided data in multiple data servers with redundancy, even if one of the data servers goes down, the original data can be restored only from the data of other normal servers. A video archive device can also be constructed. Considering that the data server itself goes down, such a distributed data archiving mechanism is more secure.
[0017]
Also, in the video archiving apparatus according to the first aspect of the present invention, in one set of dividing means and integrated restoring means, the data to be distributed and stored is compressed and stored using a reversible data compression algorithm, and compressed when integrated and restored. In this case, a process step for expanding the recorded data may be added.
[0018]
A second invention for solving the problem is a video signal recording unit that inputs a video signal and records it as a digital moving image data in a recording device such as a hard disk, and an audio signal recording that inputs an audio signal and records it as digital audio data in the recording device And a media drive device that reads video, audio, and still image data recorded on a storage medium, data created by the video signal recording unit and the audio signal recording unit, or data read by the media drive device The recording device and the data recorded on this recording device are divided into a plurality of parts and stored in a plurality of servers on the network, and the stored data is taken out through the network and restored to the original state on the recording device. A distributed archive processing unit, and moving image data or still image data on the recording device as a video signal. A video signal reproducing unit for reproducing and displaying, and the audio signal reproduction unit for reproducing and displaying the audio data on the recording device, and a network interface unit that interfaces with the network system
The multimedia archiving apparatus is characterized in that multimedia data can be stored and managed in a plurality of servers on the network.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. First, in order to promote a correct understanding of the present invention, a distributed data archiving apparatus, which is one embodiment of WO 01/46808 A1, which is the basis of the present invention will be described first, and then an embodiment according to the present invention will be described. A video archive device will be described.
[0020]
FIG. 1 is an overall configuration diagram of a distributed data archive system. Reference numeral 3 denotes a distributed data archive device. The distributed data archiving apparatus 3 is logically connected to a plurality of data servers 2 (2a, 2b, 2c,... In FIG. 1) via a network 9, and constitutes a distributed data archiving system 1. The network 9 may be assumed to be the Internet. The distributed data archiving apparatus 3 can be said to be a core apparatus of the system 1. The distributed data archiving apparatus 3 includes download means 11, division / encryption means 13, decryption / integration means 14, data management means 15, and network means 16. On the other hand, the data server 2 includes a server body 20 and an external storage 21.
[0021]
The user obtains content data such as music data from the server 8 on the network 9 by designating a Uniform Resource Identifier (URI) through the download means 11. The obtained data can be divided and encrypted by the function of the dividing / encrypting means 13 and stored separately in the plurality of data servers 2. When data is stored, the data management means 15 creates management data that records the data storage location and storage procedure.
[0022]
The user can restore the saved data to the source data by starting the decryption / integration means 14 by designating a management data file for the data once saved in the data server 2. Decryption / integration means 14 decrypts once stored data if it has been encrypted, and restores the original state by connecting the divided pieces of data together.
[0023]
The distributed archiving apparatus 3 incorporates software program modules for realizing the functions of the download means 11, the division / encryption means 13, the decryption / integration means 14, the data management means 15, and the network means 16 into the computer body. Can be realized. Therefore, although not shown in FIG. 1, a storage device such as a hard disk device is incorporated. The download means 11 uses a WWW (World Wide Web) browser that is incorporated in the computer main body together with the OS or is available from the Internet. Depending on the data format of the content data to be downloaded, another program may be required, but such a program can usually be obtained from the Internet for a fee or free of charge. The division / encryption means 13, the decryption / integration means 14, the data management means 15, and the network means 16 will be described later. Reference numeral 19 denotes management data, which is recorded in a storage device built in the distributed data archive device 3.
[0024]
FIG. 2 is a diagram for explaining the management data 19. The management data 19 is recorded in a folder prepared for each data file to be distributed and stored under a management folder that exists only for each user in the built-in hard disk device. In FIG. 2, there are folders corresponding to file1, file2, and file3 in the management folder of user A. Therefore, it can be seen that these three files have been stored in the distributed data archive device 3. Management data 19 which is information necessary for restoring the file in each of those folders, that is, a file division method, an encryption method, an order of division / encryption, an identification character, a number or a condition indicating a redundant storage method A list of formulas and storage server addresses (URIs) is created and recorded. The management folder of user A stores the password of user A, and requests a password when opening the management folder.
[0025]
FIG. 7 is a diagram for explaining another aspect of the configuration method of the management folder and management data 19 for each user. As shown in FIG. 2, the contents of the management data 19 are not directly recorded in each folder of file1, file2, and file3, but information (URI or the like) for accessing the management data 19 is provided. Therefore, in the case of FIG. 7, not only the data file to be stored but also the contents of the management data of the data file are recorded in the data server 2 on the network. Thus, the merit of the method of indirectly recording the contents of the management data 19 is that the storage space of the management folder for each user can be saved.
[0026]
FIG. 3 is a flowchart showing the operation flow of the distributed data archiving apparatus 3. Hereinafter, the operation of the distributed data archiving apparatus 3 will be described with reference to the flow of FIG. In the following description of the flow, it is assumed that the configuration of the management folder and management data 19 for each user is the case of FIG.
[0027]
When the user tries to open his own management folder, the user requests a password set in the folder (S1). Only when the correct user password is entered here, the data management means 15 reads the contents of the user's management folder, displays the name of the data file entrusted to the outside in the past, and has an operation menu. Display (S5). Next, it waits for an interactive operation input by the operator (S7).
[0028]
When the operator selects the new storage from the operation menu, the operator designates the target file by the command operation of the OS of the computer of the distributed data archiving apparatus 3 (S11). Next, a file division method is designated from a menu screen provided by the data management means 15 (hereinafter the same) (S13). The file division method includes a method in which the effective data amount in one divided file is fixed, and a method in which the effective data amount is determined by a mathematical formula for each divided file and then dummy data is packed. In either case, the created split file is assumed to have a fixed length. The number of divided files, the effective data length of each divided file, and the size of the divided file are determined as described above. Next, decide the encryption method. In this case, for each divided file, the encryption method and the encryption key are set (S17).
[0029]
Next, a redundant storage method is designated (S19). As the redundant storage method, two methods of mirroring and parity file creation that are generally used in a RAID disk or the like can be selected. In the case of mirroring, special parameters need not be specified for each divided file, just by storing them on two different servers, the primary and secondary. On the other hand, when creating a parity file, a block length, which is a unit for dividing data into a plurality of files, and a parameter for the number of divisions indicating how many files are divided are designated.
[0030]
Next, the division / encryption means 13 is called, and divisional encryption is performed according to the method designated so far to create a divisional file (S23). In the case of redundant storage by the parity file creation method, a plurality of divided files created by the division / encryption means 13 are simply joined together to form one data file, which is then designated according to the parameters specified earlier. Divide into multiple recording files and create one parity file for data restoration.
[0031]
Next, a storage server is secured (S29), and one divided file is transferred to the storage server (S31). In the case of redundant storage by the mirroring method, the divided file is transferred to two servers at different primary and secondary locations. When redundant storage is performed using the parity file creation method, the transfer target is the plurality of recording files and one parity file described above.
[0032]
This transfer is executed by the network means 16 in accordance with a file transfer protocol (hereinafter referred to as FTP) which is a standard technology of the Internet. Specifically, for example, a setting file in which about 10 URIs of FTP servers for storage are recorded is prepared in advance in the external storage device of the distributed data archiving apparatus 3 and is described in the URI list of this setting file. Select one of the FTP servers appropriately, transfer the divided data file, and if the transfer is successful, transfer the next divided file to the next FTP server in the URI list. Also good. If the transfer fails for some reason, it is changed to the next FTP server in the URI list and the divided data file is transferred again. In this way, steps S29 and S31 are executed. This is repeated until the necessary number of divided files have been transferred. Finally, by the operation of the data management means 15, the management data 19 in which the stored data file name, the data storage procedure (division method, encryption method, redundant storage method) and the URI list of the transfer destination FTP server are sequentially recorded is created. Then, it is recorded in the folder with the file name of the data file entrusted for storage under the personal folder of the user (S37). This completes the archive of one data file. The process returns to step S5 and waits for the next event.
[0033]
When the operator designates retrieval of stored data, first, the contents of the management folder of the operator are displayed, the management data file existing in the folder corresponding to the data file to be retrieved is read (S41), and the target Get the file storage server URI and data storage procedure information. Next, the divided file of the target file (a recording file when redundantly stored by the parity file creation method) is read from the storage server, and decrypted by the function of the decrypting / integrating means 14 (S43). Similarly, the decryption / integration means 14 removes unnecessary dummy data from the divided file from the description of the file division method, and connects them correctly to restore them into one file, which is the same as when the management data 19 is stored. The restored file is placed in the folder (S51). Thus, the stored data can be browsed again by the user. Information necessary for data restoration is recorded in the management data file 19 of the target file, and the distributed data archiving apparatus 3 automatically performs decryption integration processing. Therefore, the user needs to restore it from a plurality of divided files. There is no need to be aware of it.
[0034]
If the operator selects the end from the menu in step S5, the file restored so far is deleted (S53), and the function of the distributed data archiving apparatus 3 ends.
[0035]
In FIG. 3, after the decrypted file is decrypted for each divided file (S43), the entire integration (S47) is performed. However, the data storage procedure information includes information indicating the order of division and encryption. If it is recorded, it is possible for the decoding / integration means 14 to perform the decoding in accordance with the target data in accordance with which stage the decoding is performed.
[0036]
Further, the division / encryption means 13 can add the dummy data according to a certain rule before or after the target data is divided or encrypted after being divided, or after being encrypted and divided. If the storage procedure parameter is designated at 19, the process of removing dummy data is also performed at step S 23 and step 43.
[0037]
The distributed data archiving apparatus 3 has been described in detail above. The data file downloaded from the server 8 through the Internet 9 can be divided and stored in a plurality of data servers 2 on the network by the functions of the division / encryption means 13, the decryption / integration means 14, and the data management means 15. The user does not need to have a storage space of a capacity necessary for storing a large amount of download files and the like on the distributed data archive device 3. The user only needs to manage the management data 19 and is freed from the complexity of managing a large amount of data.
[0038]
Next, as an embodiment of the present invention, a video data archiving apparatus to which a mechanism for dividing and storing data in the distributed data archiving apparatus 3 and distributing it on a network will be described. FIG. 4 is an overall configuration diagram of the video data archiving apparatus 4. The video data archiving apparatus 4 is a dedicated apparatus specialized for storage management of video image data using the distributed archiving function of the distributed data archiving apparatus 3. In FIG. 4, reference numeral 30 denotes a video signal recording unit. Digitally convert a terrestrial or BS analog broadcast TV signal received by a TV antenna, or receive a digital broadcast TV signal or a digital video signal from a digital video camera, and perform MPEG compression coding. The video data is recorded on the hard disk 70 as digital data. The video signal recording unit 30 performs an A / D conversion unit 31 that AD converts a signal from an analog broadcast receiver, a frame synchronization unit 33 that captures a video signal as one frame of still image data, and performs MPEG compression coding. The MPEG encoding unit 34 includes a DV decoding unit 32 that receives a signal from a digital broadcast receiver or a video signal from a digital video camera and converts it into a data format that can be processed by the MPEG encoding unit 34.
[0039]
Reference numeral 40 denotes a video signal reproducing unit. A video data file recorded in the hard disk 70 after being compressed and encoded in the MPEG format is decoded into a read-out form, and further converted into an analog signal to be a video signal output to a TV monitor. The video signal reproduction unit 40 includes an MPEG decoding unit 41 and a D / A conversion unit 42.
[0040]
Reference numeral 70 denotes a hard disk. A capacity that can be accommodated for one piece of moving image content data such as a movie is a minimum.
[0041]
Reference numeral 50 denotes a distributed archive processing unit. FIG. 5 shows the details. The division / encryption means 53, the decryption / integration means 54, the data management means 55, and the network means 56 are the same as the division / encryption means 13, the decryption / integration means 14 of the distributed data archiving apparatus 3 described above. The functions of the data management means 15 and the network means 16 are the same.
[0042]
Reference numeral 60 denotes a network interface unit. It is a part that takes a physical and electrical interface with the Internet 9. Reference numeral 90 denotes a control unit. A menu that prompts the user to operate the remote controller by receiving commands from the user's remote controller or the like to control the operation of each unit of the video signal recording unit 30, the video signal reproduction unit 40, and the distributed archive processing unit 50. Alternatively, a simple text character is displayed on a small liquid crystal display 91 dedicated to the video archive device.
[0043]
FIG. 6 is a flowchart for explaining a procedure for using the video data archiving apparatus 4. First, the user records data from a TV program or a digital video camera by remote control operation or the like (S100). In the case of terrestrial broadcasting or BS analog broadcasting, the cable from the TV receiver is connected to the terminal 38, and in the case of digital broadcasting or digital video camera, the cable of the TV receiver or digital video camera is connected to the terminal 39 to input the signal. MPEG-encoded data is created, and an appropriate name is given and recorded on the hard disk 70.
[0044]
Next, the created video data file is stored in several servers on the Internet by the function of the distributed archive processing unit 50 (S110). At this time, a video data file management file 59 is created by the operation of the data management means 55 and recorded in a storage area (actually, the hard disk 70 may be managed) managed by the distributed archive processing unit 50. Data storage parameters at this time may be determined in advance by remote control operation or the like, and may be set according to the determined parameters. It is assumed that the data management unit 55 reads out the data storage parameters and displays them on the display 91 or displays the data prompting the user to select, and reads and sets the selection result.
[0045]
By selecting the archived video data file management file 59 at any time, the user can re-read and assemble the stored data through the Internet 9 and reproduce it on the hard disk 70 as the original video data file (S120). ). Then, the reconstructed video data file is reproduced to enjoy the video (S130). When playback ends, the video data file is deleted. The hard disk 70 may have a space that can theoretically accommodate a video data file for one moving image content.
[0046]
The video archive device 4 has been described as an embodiment of the first invention. Next, an embodiment of a multimedia archive device as a second invention will be described.
[0047]
FIG. 8 is a block diagram illustrating an embodiment of the multimedia archive device. Reference numeral 80 denotes an audio signal recording unit. An audio compression encoding unit 81 that compresses and encodes the digital audio signal is incorporated, and the audio signal is recorded on the hard disk 70 as digital data. Reference numeral 93 denotes a media drive device. A storage medium such as a CD or a DVD may be read and the video / audio may be played back through the video signal playback unit 40 or the audio signal playback unit 88 or may be temporarily recorded in the hard disk 70. The audio signal reproduction unit 88 converts audio-only digital data into an analog audio signal and outputs the analog audio signal to the audio signal output terminal 48. The other components are the same as those of the video archive device 4. After all, the multimedia archiving apparatus 5 has a configuration in which an audio signal recording unit 80, a media drive unit 93, and an audio signal reproducing unit 88 are added to the video archiving apparatus 4.
[0048]
The multimedia archiving apparatus 5 is capable of archiving not only TV programs and digital videos, but also archives of stored media data and data of only those sounds. Since the distributed archive processing unit 50 is the same as that of the video archive device 4, the function of the distributed archive itself is the same as that of the video archive device 4.
[0049]
The multimedia archive device 5 has been briefly described above. Here, a supplementary description will be given of the distributed archive processing unit 50 that is commonly used. When the division / encryption means 13 creates a divided file in step S23 of FIG. 3, it is possible to include a process of compressing the divided file using a reversible compression algorithm at the end. In that case, the decryption / integration means 14 must first perform the processing step of decompressing the compressed file when decrypting the divided file in step S43 of FIG. Any compression algorithm can be used as long as it can be reversibly compressed. Thus, you cannot expect dramatic compression, but you can save some archive space.
[0050]
【The invention's effect】
As described above, according to the video data archiving apparatus or the multimedia archiving apparatus of the present invention, a large amount of content data is distributed and stored in other servers on the network. There is no need to have a management file for stored content data, and you can restore and play back the stored data at any time. Play. Since the stored data can be stored in a plurality of servers with redundancy, safety is high. Since the stored data can be encrypted and stored as needed, there is no worry if the data is eavesdropped when it is retrieved from a storage server on the Internet. Furthermore, it is possible to save archive space by selecting and storing the compressed space. In addition, if the storage destination server can be connected by FTP, which is an Internet standard protocol, no other special mechanism is required, and the storage destination can be selected quite freely, which is very convenient.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a distributed data archiving apparatus 3;
FIG. 2 is a diagram showing a configuration of a management folder and management data.
FIG. 3 is an operation flowchart of the distributed data archiving apparatus 3;
FIG. 4 is a configuration diagram of a video archive device 4 according to an embodiment of the present invention.
FIG. 5 is a detailed explanatory diagram of a distributed archive processing unit 50;
6 is a usage flow diagram of the video archive device 4. FIG.
FIG. 7 is a diagram showing another aspect of the configuration of a management folder and management data.
FIG. 8 is a configuration diagram of a multimedia archive device 5 according to the embodiment of the present invention.
[Explanation of symbols]
1 Distributed data archive system
2 Data server
3 Distributed data archiving equipment
4 Video archive device
5 Multimedia archive device
8 Content server
9 Network
11 Download means
13 Split / Encryption Means
14 Decryption and integration means
15 Data management means
16 Network means
19 Management data
30 Video signal recording unit
31 A / D converter
32 DV decoder
33 Frame synchronization unit
34 MPEG encoding section
38 Analog video signal input terminal
39 Digital video signal input terminal
40 Video signal playback unit
41 MPEG decoder
42 D / A converter
49 Video signal output terminal
50 Distributed Archive Processing Unit
53 Split / Encryption Means
54 Decryption / Integration Means
55 Data management means
56 Network means
59 Management data
60 Network interface part
70 Hard disk device
80 Audio signal recording unit
88 Audio signal playback unit
90 Control unit
91 LCD monitor
92 Remote control signal sensor
93 Media drive device

Claims (7)

A video signal recording unit that inputs a video signal and records it as a digital video data in a recording device such as a hard disk, a recording device that records the digital video data created by the video signal recording unit, and digital video data recorded in the recording device Is divided into a plurality of parts, stored in a plurality of servers on the network, and the stored data is taken out through the network and restored to the original state on the recording device, and on the recording device A video signal reproducing unit for reproducing and displaying digital moving image data, and a network interface unit for interfacing with a network network;
The distributed archive processing unit includes a dividing unit that divides the digital video data to be stored into a plurality of parts, an integrated restoration unit that restores the divided and stored data to the original single data file, and data that stores the stored data. Record data storage procedure information that records the data storage location and the method of dividing the data to be stored when newly storing data, as well as network communication means for transferring data files using a communication protocol defined with the server. Data management means, and
The data management means is data that is stored in a distributed manner under the management folder that includes the data storage location and the data storage procedure information, or the management folder in which only one information exists for each user to access the management data. Record in a folder prepared for each file,
A video archiving apparatus characterized in that digital video data can be stored and managed in a plurality of servers on a network. The dividing means can divide and encrypt the target data or create a plurality of divided data to be divided and stored after the encryption. The data management means can encrypt and decrypt In the data storage procedure information, the integration / restoration means decrypts the stored divided data and integrates them according to the data storage procedure information, or integrates them first. The video archiving apparatus according to claim 1, wherein the video archiving apparatus restores the original data by decoding the data. The dividing unit can add dummy data before or after dividing the target data according to a certain rule, and the data management unit records the dummy data adding rule in the data storage procedure information, and The video archiving apparatus according to claim 1, wherein the restoring means removes the dummy data before or after integrating the stored divided data according to the data storage procedure information. The dividing unit can add the dummy data according to a certain rule before or after dividing the target data, or after encrypting the divided data, or after the encryption, and the data managing unit can add the dummy data. The data addition rule is recorded in the data storage procedure information, and the integrated restoration means integrates or decrypts the stored divided data according to the data storage procedure information and then integrates or decrypts and integrates the data. The video archiving apparatus according to claim 2 , wherein dummy data is removed before or after performing. By storing the data divided to be stored in multiple data servers on the network with redundancy, even if one of the data servers goes down, the original data can be obtained only from the data of other normal servers. The video archive device according to claim 1 , wherein the video archive device can restore the video. 6. A video according to claim 2, wherein the data to be distributed and stored is compressed and stored using a reversible data compression algorithm. Archive device. A video signal recording unit that inputs a video signal and records it as a digital moving image data on a recording device such as a hard disk, an audio signal recording unit that inputs an audio signal and records it as a digital audio data in a recording device, and a video recorded on a storage medium A media drive device for reading out audio and still image data, a recording device for recording data created by the video signal recording unit and the audio signal recording unit or data read out by the media drive device, and recorded on the recording device The distributed archive processing unit that divides the stored data into a plurality of parts, stores the data in a plurality of servers on the network, takes out the stored data through the network, and restores the original state on the recording device, and the recording device Video signal playback unit that plays back and displays the above video data or still image data as a video signal Includes a sound signal reproducing unit for reproducing and displaying the audio data on the recording device, and a network interface unit that interfaces with the network system,
The distributed archive processing unit includes a dividing unit that divides the digital video data to be stored into a plurality of parts, an integrated restoration unit that restores the divided and stored data to the original single data file, and data that stores the stored data. Record data storage procedure information that records the data storage location and the method of dividing the data to be stored when newly storing data, as well as network communication means for transferring data files using a communication protocol defined with the server. Data management means, and
The data management means is data that is stored in a distributed manner under the management folder that includes the data storage location and the data storage procedure information, or the management folder in which only one information exists for each user to access the management data. Record in a folder prepared for each file,
A multimedia archiving apparatus that can store and manage multimedia data in a plurality of servers on a network.

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