KR20060112388A - Data management method of digital video recorder - Google Patents

Abstract

A data management method for a DVR(Digital Video Recorder) is provided to efficiently manage data recorded in an embedded HDD(Hard Disc Drive) and an external HDD when the DVR is connected to the external HDD to expand the capacity of a storing device. In case capacity for storing data is secured in an embedded HDD when the data are stored in a DVR including an external HDD(S21,S22), a control unit stores the corresponding data in the embedded HDD(S23). When the capacity for storing the data is insufficient in the embedded HDD, the control unit moves a part of previously stored data to the external HDD, stores the moved data in the external HDD, and stores the other data in the embedded HDD(S24,S25).

Description

DATA MANAGEMENT METHOD OF DIGITAL VIDEO RECORDER}

1 is a block diagram of a digital video recorder to which the present invention is applied.

2 is a flowchart of a first embodiment of a data management method according to the present invention;

3 is a diagram schematically showing an example of a program information management method in the first embodiment of the data management method according to the present invention;

4 is a diagram schematically showing a second embodiment of a data management method according to the present invention;

5 is a diagram schematically showing an example of a program information management method in the second embodiment of the data management method according to the present invention;

<Explanation of symbols for the main parts of the drawings>

10: DVR 20: External Hard Disk (HDD_B)

11: control unit 12: internal hard disk (HDD_A)

13: display unit 14: interface unit (I / F)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data management method of a digital video recorder (DVR). In particular, in the case of an HDD-based digital video recorder, an external hard disk (HDD) is connected in order to expand storage capacity. It relates to a data management method of a digital video recorder (DVR) that can be managed efficiently.

Digital Video Recorder (DVR), also called HDR (Hard Disk Recorder) or PVR (Personal Video Recorder), is based on a large-capacity storage device such as a hard disk (HDD) to store digital broadcast signals as well as existing analog broadcast signals. Is a digital video storage device that a user can play and watch when needed. Digital video recorders (DVRs) are devices that use recordable DVD media in addition to hard disks (HDDs) as storage devices, but DVD media have the advantage of easily changing media. Since it is about SD level, single alyer standard), there is a restriction in data storage capacity or obvious data management compared to hard disk (HDD) based mass storage device.

The basic function of a digital video recorder (DVR) is to store and view a program from a broadcasting station, but to record the information on a hard disk (HDD) and to play it in a file playback method such as a computer, a central processing unit, an operating system, A memory chip containing playback software and a hard disk (HDD) are provided to differentiate the conventional VCR. That is, it consists of a TV tuner, storage and playback software, a modem, a hard disk (HDD), and the like. By combining a hard disk employed in a computer, TV programs are converted into digital signals and stored on the hard disk (HDD). There is a big advantage in that it is reproduced when necessary.

What's more, the digital video recorder (DVR) offers time-shift, instance replay and other trick play functions in addition to the basic recording function, compared to conventional analog VCRs. It's a lot more advanced. In particular, the HD-quality high-definition digital broadcasting can be stored and viewed at any time on the hard disk (HDD), and various additional service functions provide users with great utility.

However, even if the hard disk (HDD) of the digital video recorder (DVR) where the program is stored is a mass storage device, the size and capacity of the hard disk (HDD) are physically limited. You will not be able to record programs. Therefore, in order to solve the lack of capacity of the hard disk (HDD), it is necessary to select a method of deleting an existing recorded program or further connecting and using an external hard disk (HDD).

However, since a hard disk (HDD) is a type in which a recording device and a medium are combined, the media (HDD) cannot be separated separately, and most manufacturers prohibit the user from disassembling the system arbitrarily due to reliability problems. In addition, if the operating system of the digital video recorder (DVR) is inserted into the hard disk (HDD) like a computer (PC), the user may not arbitrarily replace the internal hard disk (HDD) for the operation of the system even if the difficulty of assembly is eliminated. Because of this problem, the recording capacity per HDD is superior to DVD or other storage media, but the recording capacity decreases as the number of recordings you want to collect increases. It provides an interface means to expand (HDD), and expands capacity by connecting an external hard disk (HDD) based on this.

As such, when an external hard disk (HDD) is connected to the digital video recorder (DVR) to expand the storage capacity, there is a problem of managing previously recorded data. In other words, despite the capacity expansion, from the user's point of view, it is important to maintain and manage the recorded recordings as a single integrated storage device rather than the physical view of the internal hard disk (HDD) or the external hard disk (HDD). This concept of integrated storage requires a means to manage the recordings at a glance.

An object of the present invention is to provide a method for efficiently managing data stored in a hard disk (HDD) in a digital video recorder (DVR).

Still another object of the present invention is to record data recorded on the internal hard disk (HDD) and the external hard disk (HDD) when the external hard disk (HDD) is connected to expand the capacity of the storage device in the digital video recorder (DVR). It is to provide a way to manage efficiently.

It is still another object of the present invention to connect data recorded on an internal hard disk (HDD) and an external hard disk (HDD) when an external hard disk (HDD) is connected for expansion of a storage device in a digital video recorder (DVR). It provides a way to efficiently manage copyright issues.

The digital video recorder (DVR) data management method of the present invention for achieving the above object has a capacity that can be stored in the internal hard disk (HDD) when storing data in the digital video recorder (DVR) including an external hard disk (HDD) When the data is stored in the internal hard disk (HDD), if there is not enough storage capacity in the internal hard disk (HDD) to move some of the stored data to the external hard disk (HDD) to store and Performing data storage on a hard disk (HDD); Characterized in that comprises a.

Also, in the present invention, whether to move and store the external hard disk (HDD) is characterized by estimating the temporal recording length of the data to be stored in the internal hard disk (HDD) and determining based on the temporal length of the remaining capacity. do.

In the present invention, whether or not to move and store the external hard disk (HDD) is characterized in that the moving and storing by selecting from the oldest time in the data stored in the internal hard disk (HDD).

Also, in the present invention, when moving and storing some data from the internal hard disk (HDD) to the external hard disk (HDD) and storing the data in the internal hard disk (HDD), the stored data list is converted into a hard disk (HDD) type. It characterized by further comprising the step of displaying without distinguishing.

In addition, the digital video recorder (DVR) data management method of the present invention for achieving the above object, the internal hard disk (HDD) and the type of data to be stored in the digital video recorder (DVR) including an external hard disk (HDD); Allocating a storage area of an external hard disk (HDD), determining a type of data to be stored, and storing corresponding data in a predetermined area of the allocated hard disk (HDD) corresponding to the determination result; Characterized in that comprises a.

Also, in the present invention, the data types are classified according to the genre of the recording material.

In the present invention, the data type is characterized in that it is classified according to the parental level.

In addition, the digital video recorder (DVR) data management method of the present invention for achieving the above object, the step of determining whether the copyright protection function is set in the digital video recorder (DVR) including an external hard disk (HDD) And storing the encrypted data in the case where the content is copyright protected as a result of the determination and converting the key used for encryption into a database (DB) and storing it in the internal hard disk (HDD). If not storing the data without encryption; Characterized in that comprises a.

In addition, the digital video recorder (DVR) data management method of the present invention to achieve the above object, the step of determining the storage space of the internal hard disk (HDD), if the storage space of the internal hard disk (HDD) is insufficient internal hard After reserving the storage space by moving some data from the data stored in the disk (HDD) to the external hard disk (HDD), retrieving copyright information of the data to be stored in the internal hard disk (HDD), the copyright information search Accordingly, storing the corresponding data in a predetermined area of a hard disk (HDD) allocated for each data type, and storing the corresponding copyright related information as a database and storing the data in the internal hard disk (HDD); Characterized in that comprises a.

In the present invention, in the case of the copyright protection target according to the copyright information search results, the corresponding data is encrypted and stored in the internal hard disk (HDD), and the encryption key is stored in the internal hard disk (HDD). .

An embodiment of a data management method of a digital video recorder (DVR) of the present invention made as described above will be described with reference to the accompanying drawings.

1 is a diagram illustrating a digital video recorder (DVR) and an external hard disk (HDD) according to the present invention. The digital video recorder (DVR) is provided with easily removable interface means such as USB, and for users who want more storage capacity by connecting an external hard disk (HDD) to the digital video recorder (DVR) via the interface means. Solving the problem of insufficient storage capacity. In the case of USB, up to 127 devices can be connected in theory, and the number of hard disk (HDD) accesses and the number of hard disks (HDDs) do not matter because of the characteristics of a digital video recorder (DVR). Capacity expansion is virtually guaranteed.

In the present invention, the user merely serves to connect a hard disk (HDD) to the system, and the system can be easily used and maintained and managed even if the user does not perform any manipulation on the extended hard disk (HDD). Provide the foundation.

In addition, the same level of copyright protection as the internal hard disk (HDD) is applied to the extended hard disk (HDD).

Referring to Fig. 1, a digital video recorder (DVR) 10 according to the present invention includes a control unit 11 for performing data storage control, a database (DB) of copyright related information, and a built-in hard disk for data storage. (HDD_A) 12, a display unit 13 for displaying images necessary for data maintenance, management, playback, and the like, and an interface unit 14 for connecting the external hard disk HDD_B.

2 is a flowchart of a first embodiment of a data management method of a digital video recorder (DVR) according to the present invention. The first step S21 is a step in which the control unit 11 estimates the recording length before recording the broadcast program-multimedia content-data selected by the user. In this step, the recording length is for comparing with the remaining capacity of the internal hard disk (HDD_A) 12 based on time.

The second step S22 is a step of determining whether the remaining capacity of the internal hard disk (HDD_A) 12 is sufficient compared with the data capacity to be recorded currently. As a result of the determination of this step, if the remaining capacity of the internal hard disk (HDD_A) 12 is sufficient, the process proceeds to the third step S23 to continue data recording, otherwise the process proceeds to the fourth step S24 and other available data is available. It is determined whether or not there is a hard disk (HDD), that is, an external hard disk (HDD_B) 20.

As a result of the determination in the fourth step S24, if there is an external hard disk (HDD_B) 20, the process proceeds to the fifth step S25 to record the oldest recording among the data of the internal hard disk (HDD_A) 12. The mobile hard disk 20 moves to the external hard disk (HDD_B) 20 and stores it, and searches for the remaining capacity of the internal hard disk (HDD_A) 12. In this way, if the data storage space is secured in the internal hard disk (HDD_A) 12, the process proceeds to the third step S23 to continue recording. On the other hand, if there is no external hard disk (HDD_B) 20 available as a result of the determination of the fourth step (S24), the process proceeds to the sixth step (S26) and the user deletes the oldest recordings on the display unit 13 to increase the capacity. Follow the instructions to guide them in securing.

In this way, whenever a new recording occurs, the oldest recording is moved to an external hard disk (HDD_B) 20 and stored, and the capacity of the internal hard disk (HDD_A) 12 is secured. Even if you don't know if you're in the first place, you'll be able to see that the recordings are well preserved in an integrated concept of storage.

3 is a diagram schematically showing an example of a program information management method in the first embodiment of the data management method according to the present invention.

The list of data stored in each hard disk (HDD) before and after recording is clearly expressed.

The data stored in the internal hard disk (HDD_A) 12, the playback time, the remaining capacity, etc. are expressed before recording, and the remaining capacity of the external hard disk (HDD_B) 20 is also expressed. It is expressed together. However, the recording-related information provided to the user through the display unit 13 is provided in the form of a series of lists regardless of whether the hard disk (HDD) is internal or external, as shown in the 'List Viewed by the User'. The remaining capacity is also added up. Therefore, the user can determine how much remaining capacity there is on each of the internal hard disk (HDD_A) 12 and the external hard disk (HDD_B) 20, and what recordings are stored on each hard disk (HDD). Even if you don't have to worry about it, you can easily maintain and manage your data based on the concept of integrated storage.

On the other hand, after the recording, the oldest recording is moved from the internal hard disk (HDD_A) 12 to the external hard disk (HDD_B) 20, and thus the internal hard disk (HDD_A) when a newly recorded program is intervened. 12 and the remaining capacity of the external hard disk (HDD_B) 20 are represented. Of course, even in this case, the remaining capacity summed up with the list of all recorded programs is expressed regardless of whether the hard disk (HDD) is internal or external.

4 is a diagram schematically showing a second embodiment of a data management method according to the present invention. In the data management method shown in FIG. 4, storage areas of the internal hard disk (HDD) and the external hard disk (HDD) are allocated and stored for each type of data to be stored in the digital video recorder (DVR) including the external hard disk (HDD). Data management is performed by determining a type of data and storing corresponding data in a predetermined area of the allocated hard disk HDD in response to the determination result.

This embodiment corresponds to the use of a physical hard disk (HDD) as a folder. That is, the music content 121 is stored in the internal hard disk (HDD_A) 12, and the photo content 210 is stored in the external hard disk (HDD_B) 20. Corresponds to the method of classifying and storing data by data type. Alternatively, the contents 122 and 220 may be divided and stored according to the ratings. In the latter case, the external hard disk (HDD_B) 20 can be stored and stored in the external hard disk (HDD_B) 20 so that the content having a high parental control level can be used by connecting only when watching. Done.

5 is a diagram schematically showing an example of a program information management method in the second embodiment of the data management method according to the present invention. When the external hard disk (HDD_B) 20 is connected, both the internal hard disk (HDD_A) 12 and the external hard disk (HDD_B) 20 are integrated as illustrated in the list shown by the user. Show the list of saved content as shown in 4. However, when only the internal hard disk (HDD_A) 12 is present, it can be seen that the content stored in the external hard disk (HDD_B) 20 (the picture content and some movie content in FIG. 4) are not represented.

As described above, in the present invention, when the external hard disk (HDD) is connected and used, some data of the internal hard disk (HDD) is transferred to the external hard disk (HDD) and stored to facilitate the data maintenance. However, in this case, a problem of copyright management may occur. According to the digital data recorder (DVR) data management method of the present invention in consideration of this problem, it is determined whether or not the copyright protection function is set in the digital video recorder (DVR) including an external hard disk (HDD), and the determination is made. As a result, if the content is copyright-protected, the data is encrypted and stored, and the key used for encryption is converted into a database (DB) and stored in the internal hard disk (HDD). Data management is performed by storing the data without encryption.

If the digital video recorder (DVR) manages the hard disk (HDD) with its own file system, no data can be read even if the USB hard disk (HDD) formatted by the digital video recorder (DVR) is connected to the computer (PC).

However, if you use the Windows or Linux standard rather than your own file system, the hard disk (HDD) can be used for all programs because the content (broadcast stream) allowed for limited users can be copied and propagated to third parties indefinitely. Should be classified and managed according to whether or not to allow replication.

Therefore, broadcasting streams or DRM-protected MP3 files, etc., which are not allowed to be copied, are encrypted and stored on the internal hard disk (HDD_A) 12. Store without encryption. Of course, even if it is a personal work, if the user does not want to distribute it, the user can select and specify it to be encrypted and stored.

In addition, all the keys used for encrypting the contents are stored in a database, and the databases are divided for each hard disk (HDD). This database is also encrypted and stored in the internal hard disk (HDD_A) 12.

In this way, the content can be transferred and stored indefinitely to the external hard disk (HDD_B) 20 as described above, but playback is only possible with the corresponding digital video recorder (DVR) containing the encryption key information. The problem of protection can be solved.

The present invention provides an efficient and convenient data management method when an external hard disk (HDD) is connected to solve the shortage of storage capacity of a digital video recorder (DVR).

In the present invention, the system actively manages data in a digital video recorder (DVR) including an external hard disk (HDD), data movement according to storage capacity, processing of copyright-related information, data genre or parental control level Control such as automatic classification storage based on it enables more convenient data management in digital video recorder (DVR).

Claims (10)

Storing data in an internal hard disk (HDD) when the capacity of the digital video recorder (DVR) including an external hard disk (HDD) is stored in the storage capacity of the internal hard disk (HDD) when the data is secured; If the storage capacity of the disk (HDD) is insufficient, moving some of the previously stored data to the external hard disk (HDD) and storing the data on the internal hard disk (HDD); Data management method of a digital video recorder (DVR) comprising a. The method of claim 1, wherein whether to move and store the external hard disk (HDD) is determined based on a temporal length of the remaining capacity by predicting a temporal recording length of data to be stored in the internal hard disk (HDD). Data management method of a digital video recorder (DVR). The digital video recorder (DVR) of claim 1, wherein whether to move and store the external hard disk (HDD) is selected from the data stored in the internal hard disk (HDD) from the oldest one in time. How to manage your data. According to claim 1, When the data stored in the internal hard disk (HDD) from the internal hard disk (HDD) to the external hard disk (HDD) to move the data stored in the list of data stored in the hard disk (HDD) type The data management method of the digital video recorder (DVR) further comprising the step of displaying without distinguishing. Allocating a storage area of the internal hard disk (HDD) and the external hard disk (HDD) for each type of data to be stored in a digital video recorder (DVR) including an external hard disk (HDD), and determining the type of data to be stored. Storing corresponding data in a predetermined area of the allocated hard disk (HDD) in response to the determination result; Data management method of a digital video recorder (DVR) comprising a. The method of claim 5, wherein the data types are classified according to genres of recordings. The method of claim 5, wherein the data type is classified according to a parental level. Determining whether the copyright protection function is content set in a digital video recorder (DVR) including an external hard disk (HDD), and if the content is copyrighted content as a result of the determination, the data is encrypted and stored and used for encryption. Converting the key into a database (DB) and storing it in an internal hard disk (HDD); if the determination result is not the copyrighted content, storing the data without encrypting the data; Data management method of a digital video recorder (DVR) comprising a. Determining a storage space of an internal hard disk (HDD), and when some storage space of the internal hard disk (HDD) is insufficient, move some data from the data stored in the internal hard disk (HDD) to an external hard disk (HDD) Retrieving copyright information of data to be stored in the internal hard disk (HDD) after securing the storage space; storing the corresponding data in a predetermined area of the hard disk (HDD) allocated for each data type according to the copyright information retrieval; Storing copyright-related information in a database and storing it in an internal hard disk (HDD); Data management method of a digital video recorder (DVR) comprising a. 10. The method of claim 9, wherein, in the case of a copyright protection target according to the copyright information search result, the data is encrypted and stored in the internal hard disk (HDD), and the encryption key is stored in the internal hard disk (HDD). Data management method of a digital video recorder (DVR).

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