JP2003153152A - System and method for video recording and reproduction and database server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record mass data responding to the needs of a user while reducing the manufacturing cost of a video recording and reproducing device, and also to effectively utilize a storing means provided in a database server. SOLUTION: This video recording and reproduction system records moving image data in a user hard disk 15 provided in a video recording and reproducing device 1, transmits overflowed moving image data to the database server 3 through a communication network 2 to store the overflowed moving image data in a contents storing part 4 provided in the database server 3, when an overflow of moving image data occurs in the user hard disk 15, retrieves overlapped moving image data in the contents storing part 4, and performs data merging processing that eliminates either of the overlapped data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / playback system including a recording / playback device used by a user and a database server installed on a communication network.
The present invention relates to a recording / playback method and a database server.

[0002]

2. Description of the Related Art In recent years, a hard disk recording / reproducing apparatus having a large-capacity hard disk has been developed as an apparatus for recording a program image such as a television broadcast. In this hard disk recording / reproducing apparatus, a video is recorded on a hard disk as digitized moving image data, and this data is read out to reproduce.

However, in recent years, in addition to conventional terrestrial broadcasting, various television broadcasting such as BS broadcasting and cable television has come to be performed, and the broadcasting time has expanded and the number of channels has increased, so that the hard disk Although the storage capacity has increased, the recording capacity is limited, and it is difficult to record all the programs desired by the user. In addition, a large-capacity hard disk is high in manufacturing cost, which also causes an increase in the price of the recording / reproducing apparatus.

On the other hand, the inventors of the present application installed a database server on the network, received the data overflowed in the recording / reproducing apparatus through the network, accumulated the data, and accumulated it in response to a request from the user. We have developed a system that sends data to the recording / playback device on the user side.

[0005]

However, in the above system, when overflow data is received and accumulated from a plurality of users, it may be possible to record in the same time zone and channel. In this case, Duplicate data will be generated, which may cause a problem that the storage means on the database side cannot be effectively used.

Therefore, the present invention has been made to solve the above-mentioned problem, and while reducing the manufacturing cost of the recording / reproducing apparatus, it records a large amount of data according to the needs of the user, and the database server side An object of the present invention is to provide a recording / playback system, a recording / playback method, and a database server that can effectively use the storage means.

[0007]

The present invention has been made to solve the above problems, and the present invention provides a recording / playback apparatus used by a user and a database server installed on a communication network. When performing recording and playback using, the user side storage unit provided in the recording and playback device,
Record video data provided by broadcasting or communication,
When the video data overflows in the user-side storage unit, the overflowed video data is transmitted through the communication line, and the video data received from the recording / playback device is stored in the server-side storage unit provided in the database server. The server-side storage unit searches for duplicate moving image data and deletes any of the duplicated data.

According to the present invention, when a data overflow occurs in the user-side storage unit provided on the recording / playback apparatus side, the storage destination is switched to the server-side storage unit on the network. It is possible to record a large amount of data. As a result, the user side storage unit having a small capacity can be used, and the manufacturing cost of the recording / reproducing apparatus can be reduced.

In particular, among the data stored in the server side storage unit, duplicate data is deleted and the data is merged, so that the amount of data in the server side storage unit can be reduced and the hardware resources can be saved. It can be effectively used.

In the above invention, the user management data that associates the operation history for recording the moving image data with the time when the overflow data occurs is generated, transmitted to the database server, and duplicated based on the user management data. It is preferable to retrieve the data. In this case, since the duplicate data is searched based on the user management data, the duplicate data can be detected quickly.

According to the above invention, it is preferable to detect the image quality of each of the duplicate moving image data and delete the moving image data of low image quality. In this case, when merging duplicate data, higher quality data is preferentially held, so that the quality of accumulated data can be improved.

In the above invention, the user management data includes information about the image quality of the recording device used by the user, and the image quality of the moving image data to be transmitted is adjusted based on the information about the image quality included in the user management data. Is preferred. In this case, it is possible to distribute data according to the capability of the recording / reproducing apparatus used by the user, based on the information regarding the image quality included in the user management data. Further, when the data is partially merged, it is possible to prevent unevenness in image quality during reproduction.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (Overall Configuration of Recording / Playback System)
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the recording / playback system according to the present embodiment.

As shown in FIG. 1, the recording / reproducing apparatus according to the present embodiment includes a recording / reproducing apparatus 1 used by a user and a database server 3 installed on a communication network 2.
Composed of and. In the present embodiment, the communication network 2 is a wireless or wire communication network, and is a broadband system such as ADSL or a large capacity communication line such as an optical cable.

The recording / reproducing apparatus 1 records moving picture data provided by terrestrial broadcasting, BS broadcasting, cable broadcasting, broadband communication line, or the like, and displays the recorded moving picture data on the display 6. As a means for accumulating, it has a user hard disk 15 and means for transmitting overflowed moving image data to the database server 3 through the communication network 2 when data overflow occurs in the user hard disk 15.

On the other hand, the database server 3 has a large-capacity content storage unit 4 for storing the moving image data received from the recording / playback apparatus 1, and the content storage unit 4
A user management database 5 for storing user management data for managing the data stored in

According to such a recording / reproducing system, the user hard disk 15 provided in the recording / reproducing apparatus 1
When the user hard disk 15 overflows the moving image data, the overflowed moving image data is transmitted to the database server 3 through the communication network 2 and the content storage unit 4 provided in the database server 3 Accumulate in.

(Structure of Recording / Reproducing Apparatus) The internal structure of the recording / reproducing apparatus 1 will be described in detail with reference to FIG. As shown in the figure, the recording / reproducing apparatus 1 has an operation unit 7, a reserved recording control unit 9, a tuner unit 10, a display interface 12, a data conversion unit 13, and a data conversion unit as means for performing recording / reproduction. It has an input / output unit 14 and a user hard disk 15.

The operation unit 7 is used to operate the recording / reproducing apparatus 1, and is an operation button, a touch panel, or a remote controller provided on the outer surface of the apparatus. The operation unit 7 sends a control signal to each unit of the device according to a user's operation,
Performs operations such as recording start and recording end, channel operation, fast forward, rewind, and recording reservation. The operation history of the operation unit 7 is sent to the operation history data generation unit 8. In the operation of the operation unit 7 in the present embodiment, the all channel designation mode is provided, and the recording start and recording end operations can be collectively performed for all broadcast programs on all channels without designating a specific channel. You can

The reserved recording control section 9 operates the tuner section 10 by designating a recording time and has a timer function. When the predetermined time is reached, the tuner section 10 is operated to perform recording. Let the process run. The reserved recording controller 9 outputs the history of the recording process performed by the tuner 10 to the operation history data generator 8. In the operation of the operation unit 7 in the present embodiment, all channels / all time designation recording mode is provided, and broadcast programs in all time zones on all channels are collectively set without designating a specific channel and time. Recording reservation operation can be performed.

The tuner unit 10 receives streams of terrestrial broadcasting, BS broadcasting, and cable broadcasting by switching channels, and is a receiver compatible with analog broadcasting and digital broadcasting. The stream data received by the tuner unit 10 is sent to the data conversion unit 13 and the display interface 12.

The display interface 12 displays the stream data input from the tuner section 10 and the data conversion section 13 on the display 6.

The data converter 13 converts the stream data received by the tuner 10 into the user hard disk 1.
In step 5, the data structure is converted into a recordable data structure. For example, an analog broadcast stream is converted into digital data and converted into a data format that complies with a standard such as MPEG.

The data input / output unit 14 inputs / outputs data to / from the user hard disk 15.
The moving image data input from the data conversion unit 13 is written in the user hard disk 15, or the moving image data recorded in the user hard disk 15 is read and displayed on the display 6 through the display interface 12.

Further, the data input / output unit 14 switches between the data from the data conversion unit 13 and the data from the data transmission / reception unit 18 in response to an instruction from the data control unit 17 and connects the data to the user hard disk 15. It also has a function to change the data input / output route.

Further, the data input / output unit 14 monitors the overflow of the data in the user hard disk 15, and if the overflow occurs during the recording of the data, the time when the overflow occurs and the writing just before the overflow occurs. It has a function of detecting the address of the data and notifying the overflow data management unit 11 of such information.

The user hard disk 15 is a storage device for recording the digitized moving image data at a predetermined address, and writes / reads data via the data input / output unit 14. This user hard disk 15
Is a storage device, various devices can be used,
A memory or the like can be used instead.

In the present embodiment, the recording / reproducing apparatus 1 uses the user management data generation unit 1 as means for generating user management data that associates the operation history for recording moving image data with the time when the data overflow occurs.
6, an operation history data generation unit 8, an overflow data management unit 11, and a reserved recording control unit 9.

The operation history data generation unit 8 generates operation history data indicating what kind of operation the user has performed at what time. The generated operation history data is sent to the user management data generation unit 16. To be done. Specifically, the time of the recording start operation and the recording end operation performed by the user on the operation unit 7, the channel at that time, and the like are recorded. In the case of the reserved recording, the time of the recording start process and the recording end process actually performed by the tuner unit 10 and the channel at that time are recorded.

The overflow data management unit 11 converts the overflow time of the data in the user hard disk 15 detected by the data input / output unit 15, the file data name, and the storage destination address into data and sends them to the user management data generation unit 16 as overflow data. To do.

The user management data generating section 16 generates user management data based on the above-mentioned operation history data and overflow data. Specifically, the operation history by the user and the time when the data overflow occurs are associated with each other to be converted into data, and which operation of the user causes the recorded moving image file to overflow is described. Specifically, the date and time when the video data was recorded and the user hard disk 1
5, the overflow time, the channel at that time, and the moving image file name are described.

In the present embodiment, the user management data generation unit 16 is provided with a storage unit for storing an identifier for identifying the user or the recording / playback apparatus 1, and adds the identifier to the generated user management data. . This identifier is used for user authentication in the database server 3.

Further, the recording / reproducing apparatus 1 has a data transmission / reception section 18 and a data control section 17 as means for transmitting / receiving the above-mentioned respective data (moving image data, user management data).

The data transmission / reception unit 18 is a broadband modem such as ADSL or an ISDN terminal adapter, and can be connected to the communication network 2 through a communication line.

The data control unit 17 includes a data input / output unit 14
This is to switch the data input / output path of. If there is data input / output from the user hard disk 15,
When the data input / output unit 14 and the user hard disk 15 are connected and data is input / output from the data transmission / reception unit 18, the data transmission / reception unit 18 and the data input / output unit 14 are connected.
And connect. This allows the user hard disk 1
Data input / output to and from the data transmission / reception unit 18
The data input and output from is made continuous.

(Structure of Database Server) Next, the internal structure of the database server 3 will be described.
FIG. 2 is a block diagram showing the internal configuration of the database server 3.

As shown in the figure, the database server 3 according to this embodiment includes a data transmitting / receiving unit 23, a data control unit 20, a data input / output unit 19, an authentication unit 22, and a user management data processing unit 21. And have.

The data transmission / reception section 23 transmits / receives data to / from the recording / reproducing apparatus 1 through the communication network 2, and includes a broadband modem such as ADSL or the like.
An ISDN terminal adapter or the like can be used and can be connected to the communication network 2 through a communication line.

The data transmitted / received through the data transmitting / receiving unit 23 includes moving image data and user management data. The moving image data is input / output to / from the content storage unit 4 via the data control unit 20 and the data input / output unit 19. The user management data is stored in the user management database 5 via the authentication unit 22 and the user management data processing unit 21.

After obtaining the permission of the user management data processing unit 21, the data control unit 20 receives the moving image data from the recording / playback apparatus 1, sends the data to the data input / output unit 20, and sends a playback request from the user. In response to the request, permission is obtained from the user management data processing unit 21, the moving image data stored in the content storage unit 4 is read out, and is transmitted to the recording / reproducing apparatus 1 via the data transmitting / receiving unit 23.

In addition, when the data relating to the reproduction is overflowed at the time of reproducing the data, the data control section 20 inputs / outputs a notification to that effect and the time at which the moving image data was recorded and the channel. Based on the notification, the reproduction request specifying the file name desired to be reproduced is transmitted to the database server 3 based on this notification.

The data input / output unit 19 includes a data control unit 20.
The data is input / output to / from the content storage unit 4 based on the command. Specifically, at the time of recording, the storage destination address of the recorded data is notified to the user management data processing unit 21 through the data control unit 20,
At the time of reading, the user management data processing unit 21
Read the data from the storage destination address obtained from
The data is transmitted to the data transmitting / receiving unit 23 through the data control unit 20.

The content storage unit 4 stores the overflowed data in the user hard disk 15 of the recording / playback apparatus 1 at a predetermined storage destination address. The content storage unit 4 is a data input / output unit 1
Data is input and output through 9.

The authentication unit 22 extracts the user identifier from the user management data received by the data transmission / reception unit 23, collates the registered user table registered in the user management database, and confirms whether the accessor is a registered user. It is to judge whether or not. As a result of the collation, when it is determined that the user is a registered user, the acquired user identifier is passed to the user management data processing unit 21. If it is determined that the user is not a registered user as a result of collation, access is denied.

The user management data processing unit 21 manages the personal information of the user registered in the user management database 5 and the storage status of the moving image data for each user. It also has a function of sending a data input / output permission to / from the content storage unit 4 to the data control unit 20.

More specifically, when recording data,
The data control unit 20 based on the authentication result by the authentication unit 22.
In addition to sending the permission of data recording, the storage destination address on the content storage unit 4 is acquired from the data control unit 20 after the recording is started. The acquired storage destination address is added to the received user management data, and as a result, the user management data includes the identifier of the user who requested the recording of the video data, the date and time when the video data was recorded,
Also, the overflow time in the user hard disk 15, the channel at that time, the moving image file name, and the storage destination address of the moving image data are described.

On the other hand, at the time of reproducing the data, the user management data processing section 21 performs the authentication processing of the authentication section 22 and then, based on the reproduction request from the recording / reproducing apparatus 1, the user management database 5 stores the user related to the user. The management data is searched, the storage destination address in the content storage unit 4 is acquired, and this is sent to the data control unit 20.

In the present embodiment, the user management data processing unit 21 has a charging function and counts the amount of data recorded by the user, the number of accesses, etc.
It has a function of performing charging processing according to this count.

The user management database 5 records and manages personal information (registration ID, etc.) of the user, billing information, and user management data for each user. Based on the user ID registered in the user management database 5, the authentication unit 22 performs the acceptance process of the access person, and based on the user management data stored in the user management database 5, the user management data process. The unit 21 can acquire a storage destination address and the like in which data to be reproduced is stored.

Further, the database server 3 according to this embodiment has a data merging unit 24. The data merging unit 24 searches the moving image data in the content storage unit 4 and deletes any of the overlapping data. Specifically, the data merging unit 2
Reference numeral 4 is connected to the user management data processing unit 21, periodically refers to the user management data, detects moving image data recorded in overlapping time zones and channels, and deletes any of the overlapping data. . In this embodiment, the data is deleted by detecting the respective resolutions of the duplicated data, comparing them, and deleting the data with the lower resolution.

The database server 3 also has a resolution analyzing section 25 and a resolution adjusting section 26.

The resolution analysis unit 25 analyzes the resolution based on the noise of the moving image data received from the recording / reproducing apparatus 1 and the performance based on the model, and outputs the analysis result to the user management data processing unit 21 as image quality information. To do. In response to this output, the user management data processing unit 21 records the received moving image data and the image quality information in the management database 5 in association with each other.

The resolution adjusting unit 26 is a data transmitting / receiving unit 23.
To adjust the resolution of a reproduced moving image transmitted to the recording / reproducing apparatus 1 so that the image quality is the same as the image quality at the time of recording based on the image quality information recorded in the user management data. , Adjust the resolution of the playback video. That is, when the moving image stored in the content storage unit 4 is replaced with a high-quality moving image by the merging process, the image quality is reduced to be the same as the image quality at the time of recording. Accordingly, it is possible to prevent the image quality reproduced on the recording / reproducing apparatus 1 side from changing.

(Operation) The operation of the recording / reproducing system according to the present embodiment having the above-mentioned configuration will be described. Figure 3
FIG. 4 is a flowchart showing an operation at the time of recording, and FIG.
[Fig. 5] is a flow chart showing an operation at the time of data merging, and Fig. 5 is a flow chart showing an operation at the time of reproduction.

As shown in FIG. 3, at the time of recording, first, the process is started in response to an operation by the user (S101). Specifically, the operation unit 7 performs a recording start operation or a reserved recording operation.

Next, it is determined whether the user operation is normal recording or reserved recording (S102). In the case of normal recording, a control signal of an operation on the operation unit 7 is directly input to the operation history data generation unit 8 and operation history data is generated (S104). In the case of the reserved recording, the timer is operated in the reserved recording control unit 9 to enter the standby state, and when the predetermined time is reached, the recording operation is controlled and the control signal is the operation history data generation unit 8. (S103). The operation history data generator 8 generates operation history data based on the control signal from the reserved recording controller 9 (S104).

Next, the recording operation is started (S10).
5). Specifically, the broadcast stream received by the tuner unit 10 is converted into a data file by the data conversion unit 19 (S106), and the user hard disk 15
Is recorded in (S107).

Thereafter, the judgment as to whether or not the user hard disk 15 has overflowed is successively monitored (S108). While no overflow has occurred, moving image data is stored in the user hard disk 15.

If overflow is detected in step S108, overflow data is generated (S).
109). Specifically, the data input / output unit 14 detects a data overflow, and notifies the overflow data management unit 11 of the time when the overflow occurred and the file name. User management data is generated based on the overflow data acquired by the overflow data management unit 11 and the operation history generated by the operation history data generation unit 8 (S11).
0). It should be noted that this user management data is added with an identifier for identifying the user, and further with image quality information regarding the model of the recording / playback apparatus 1 and the recording mode regarding the image quality level.

Next, the user management data generator 16
Transmits the user management data and the recording request to the database server 3 through the data transmission / reception unit 18 (S1).
11). Based on this user management data, the database server 3 authenticates the user, permits access, and stores the user management data in the user management database 5.

After the access permission is issued, the data control unit 17 switches the output path from the data input / output unit 14 from the user hard disk 15 to the data transmission / reception unit 18 (S112). As a result, the moving image data converted by the data converting unit 13 is transmitted to the database server 3 via the data input / output unit 14 and the data transmitting / receiving unit 18.

The database server 3 stores the received moving image data in the content storage unit 4 through the data control unit 20 and the data input / output unit 19 (S113). At the time of this reception, the image quality of the received moving image data is analyzed to generate image quality information and output to the user management data processing unit 21.

The storage destination address of the content storage unit 4 is acquired from the data input / output unit 19 and sent to the user management data processing unit 21 via the data control unit 20. The user management data processing unit 21 adds the storage destination address to the user management data transmitted from the recording / reproducing apparatus 1 and stores it in the user management database 5. In addition, the user management data processing unit 21 includes the resolution analysis unit 2
The image quality information analyzed by 5 is associated with the received moving image data and added to the user management data. If the user management data received from the recording / playback apparatus 1 already includes image quality information, the image quality information is recorded.

The moving image data stored in the content storage unit 4 in this way is subjected to data merge processing by the following procedure. FIG. 4 is a flow chart showing the procedure of the merge process according to this embodiment, and FIG. 5 is an explanatory diagram conceptually showing the merge process. This merge process is periodically performed.

First, when the merge process is started, the management database 5 is accessed via the user management data processing unit 21.
User management data is acquired from and aggregated (S20
1). As shown in FIG. 5, this aggregation maps the recording time (from the overflow occurrence time to the recording end time) described in the user management data to the map data in which the channel and the time are associated with each other. FIG. 5 shows a state in which the data D1 to D10 are mapped based on the user management data.

Next, duplicate data is detected based on this map data (S202). In FIG. 5, data D
3, D4 and D10 partially overlap (part in the figure). And the overlapping part,
Are compared in resolution (S203).

This resolution comparison is performed based on the image quality information of each data recorded in the user management data, and the data with better image quality is selected. Then, the duplicate data is replaced (S204). In the present embodiment, data with better image quality is left and data with poorer image quality is deleted. With respect to the data whose storage destination address has been changed by this merge processing, the contents of the user management data are updated, and the data storage destination address is rewritten to a new address.

Then, the recorded moving image data is reproduced by the following procedure. As shown in FIG. 6, a reproducing operation is started by a user operation (S301). In response to this operation, the data input / output unit 14 reads the moving image from the user hard disk 15 (S302), converts the data, and then causes the display interface 12 to display the reproduced moving image on the display 6 (S303). During this period, it is determined whether or not there is overflow data at the time of recording (S304).
Continue playing from.

Then, in step S304, when it is confirmed that the data is overflowed due to the reproduction moving image being cut off, the reproduction request is transmitted to the server (S305). Specifically, the data control unit 17 acquires a notification that an overflow has occurred from the data input / output unit 14, and transmits the file name, channel, and time at which the overflow has occurred.

In response to the reproduction request, the database server 3 side authenticates the authentication section 22 (S30).
6) The user management data processing unit 21 confirms the user management data (S307). By this confirmation, the storage location of the overflowed data is acquired. Meanwhile, on the recording / reproducing apparatus 1 side, the data control unit 17 switches the input path to the data input / output unit 14 so that the data from the data transmission / reception unit 18 is sent to the data conversion unit 13 (S308). ). Then, the reading of data from the content storage unit 4 is started, and the data is transmitted to the recording / playback apparatus 1 (S309).

In this embodiment, the image quality of the moving image data is adjusted when the reproduced moving image data is transmitted (S31).
0). Specifically, at the time of transmission, the user management data is called from the user management data processing unit 21, and based on the called user management data, the image quality of the moving image data recorded by the recording / reproducing apparatus 1 which is the transmission destination is acquired. Then, the image quality of the reproduced moving image data is adjusted so that the image quality is the same as the image quality of the moving image data at the time of recording.

The reproduced moving image data is received by the recording / reproducing apparatus 1, and the content storage section 4 is displayed on the display 6.
The data from is displayed. Since the image quality is adjusted to be the same as that at the time of recording / reproducing, there is no change in image quality between the moving image data reproduced from the user hard disk 15 and the moving image data transmitted from the database server 3 in the recording / reproducing apparatus 1, and the image quality is uniform. Video playback is performed.

In this embodiment, the recording unit is changed when an overflow occurs during recording and reproduction, but the present invention is not limited to this. For example, at the time of recording, it is preferable that the remaining capacity of the user hard disk 15 be sequentially monitored, and the storage destination be switched when the remaining capacity falls below a predetermined value. Also,
At the time of reproduction, an overflow occurs, and the overflow data management unit 11 checks whether or not the data is cut off midway. A request for reproduction is sent to the database server 3 before the data is cut off. Alternatively, the content may be already reproduced from the content storage unit 4 to prevent the reproduced data from becoming discontinuous.

[0074]

As described above, according to the present invention, the storage destination is switched to the server side storage unit on the network when data overflow occurs in the user side storage unit provided on the recording / playback apparatus side. Therefore, a large amount of data can be recorded according to the needs of the user. As a result, the user side storage unit having a small capacity can be used, and the manufacturing cost of the recording / reproducing apparatus can be reduced.

Since the moving image data stored in the database server is merged, the storage means provided in the database server can be effectively used.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a recording / playback system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a database server in the recording / playback system according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an operation at the time of recording in the present embodiment.

FIG. 4 is a flowchart showing an operation during data merge processing in the present embodiment.

FIG. 5 is an explanatory diagram conceptually showing a data merge process in the present embodiment.

FIG. 6 is a flowchart showing an operation during reproduction in the present embodiment.

[Explanation of symbols]

1 ... Recording / reproducing apparatus, 2 ... Communication network, 3 ... Database server, 4 ... Content storage section, 5 ... User management database, 6 ... Display, 24 ... Data merge section, 25 ... Resolution analysis section, 26 ... Resolution adjustment section

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Claims (12)

[Claims] 1. A recording / playback recording system comprising a recording / playback device used by a user and a database server installed on a communication network, wherein the recording / playback device is a moving image provided by broadcasting or communication. The user-side storage unit for recording data, and means for transmitting the overflowed moving-image data through a communication line when the user-side storage unit overflows the moving-image data. Video recording having a server-side storage unit that stores video data received from a storage unit, and a data merge unit that searches the server-side storage unit for overlapping video data and deletes any of the overlapping data. Playback system. 2. The recording / playback apparatus includes a data management unit that generates user management data that associates an operation history for recording the moving image data with a time when the overflow data occurs, and the database server And a reproduction moving image transmission unit that acquires the user management data from the recording / reproducing device and transmits the moving image data accumulated in the server side accumulation unit to the recording / reproducing device based on the user management data, The data merging unit searches for duplicate data based on the user management data.
Recording and playback system described in. 3. The data merging unit detects the image quality of each of the duplicate moving image data, and deletes the moving image data of low image quality.
Recording and playback system described in. 4. The user management data includes information about the image quality of the recording device used by the user, and the reproduced moving image transmitting unit transmits the information based on the information about the image quality included in the user management data. 4. The recording / reproducing system according to claim 2, further comprising an image quality adjusting unit that adjusts the image quality of the moving image data. 5. A recording / reproducing method using a recording / reproducing apparatus used by a user and a database server installed on a communication network, wherein the recording / reproducing apparatus broadcasts to a user-side storage section provided in the recording / reproducing apparatus. A step (1) of recording moving image data provided by communication; a step (2) of transmitting the overflowed moving image data through a communication line when overflow of the moving image data occurs in the user side storage unit; and the database In the server-side storage unit provided in the server, a step (3) of storing the video data received from the recording / playback apparatus, and searching for duplicate video data in the server-side storage unit, and searching for any of the duplicate data. Steps to remove (4)
And a recording / reproducing method comprising: 6. In the step (2), user management data that associates an operation history for recording the moving image data with a time when the overflow data occurs is generated and transmitted to the database server, 6. The recording / playback method according to claim 5, wherein in (4), duplicate data is searched for based on the user management data. 7. The recording / reproducing method according to claim 5, wherein in step (4), the image quality of each of the duplicate moving image data is detected, and the moving image data of low image quality is deleted. 8. The user management data includes information about the image quality of the recording device used by the user, and in step (4), the information is transmitted based on the information about the image quality included in the user management data. The recording / reproducing method according to claim 6, wherein the image quality of the moving image data is adjusted. 9. A server-side storage unit that stores overflowed video data in a user-side storage unit provided in a recording / playback apparatus used by a user, and duplicate video data in the server-side storage unit is searched and duplicated. A database server having a data merging unit that deletes any of the data. 10. The user management data for associating the operation history for recording the moving image data with the time when the overflow data occurs is acquired from the recording / playback apparatus, and based on the user management data. And a reproduction moving image transmitting unit that transmits the moving image data accumulated in the server side accumulation unit to the recording / reproducing apparatus, and the data merging unit searches for duplicate data based on the user management data. Claim 9
Database server described in. 11. The database server according to claim 9, wherein the data merging unit detects the image quality of each of the overlapping moving image data and deletes the moving image data of low image quality. 12. The user management data includes information about the image quality of the recording device used by the user, and the reproduced moving image transmitting unit transmits the information based on the information about the image quality included in the user management data. The database server according to claim 10, further comprising an image quality adjustment unit that adjusts the image quality of the moving image data.