KR20060113869A - Control method and format of metadata in multimedia contents file - Google Patents

Abstract

A method for formatting and controlling metadata of a multimedia content file is provided to offer a metadata format of the multimedia content file having copyright term metadata of multimedia contents and update the copyright term metadata included in the metadata content file for after-management of the multimedia contents. The metadata including copyright-related information is received from a digital device. A copyright terminal according to a copyright law corresponding to the multimedia contents is checked from a database of a server(S11). A copyright expiration day of the multimedia contents is calculated based on the received metadata and the copyright law(S12). The calculated copyright expiration day information of the multimedia contents is transmitted to a digital device(S13). The calculated copyright expiration day of the multimedia contents is compared with current date. DRM(Digital Rights Management) cancellation control data for canceling DRM of the expired multimedia contents is transmitted to the digital device.

Description

Control method and format of metadata in multimedia contents file}

1 is a structural diagram of a metadata format of a multimedia content file according to the present invention;

2 illustrates an overall configuration diagram for metadata control of a multimedia content file according to the present invention;

3 is a block diagram of a server and a digital device for controlling metadata of a multimedia content file according to the present invention;

4 to 7 illustrate an operation flowchart for controlling metadata of a multimedia content file according to the present invention.

Explanation of symbols on the main parts of the drawings

10: server 12: network

14,16,18: digital instrument 21: database

22: internet module 23: encoder

24: memory 25: microcomputer

26: decoder

The present invention relates to metadata of a multimedia content file, and more particularly, to a metadata format of a multimedia content file and a metadata format and control method of a multimedia content file for updating metadata and using metadata.

Today, there are many terminals for watching digital media. For example, various digital devices such as personal digital recorders (PVRs), computers, CD / DVD players, MP3 players, DMB mobile phones, PDAs, including set-top boxes have been produced and used. The digital device is a digital media, the digital media can be used by using data stored in a recording medium such as DVD, CD, USB, which is a portable storage medium, or by receiving desired data through the Internet and broadcast signals. .

In particular, in recent years, it is possible to receive a variety of digital media including a broadcast signal, and to convert it to a computer file, etc., and easy to store and convenient to use, the range of use, the age of use and the like are further expanded.

Meanwhile, in order to control, search, and browse a large amount of multimedia content in a multimedia environment such as digital broadcasting or the Internet, metadata describing the content of the multimedia content is used.

In other words, metadata is structured data related to data, and data describing other data. The metadata is data that is given to the content according to a predetermined rule in order to efficiently find and use the information being searched among a large amount of information. Therefore, the metadata is recorded with the location and content of the content, information about the author, rights conditions, usage conditions, usage history, and the like. Metadata is invisible to the person using the data. However, the machine (computer) understands the contents of the metadata, and the information available to the machine with respect to the recorded data is metadata.

The multimedia content including such metadata is set with DRM (Digital Rights Management) to protect copyrights. The DRM is a technology and service that protects the interests and rights of copyright-related parties by preventing unauthorized use of digital contents.It secures the rights and interests of content providers, prevents illegal copying, and generates contents such as charging fees and payment agents. Support from distribution to management. Therefore, digital contents are equipped with security authentication system according to DRM so that they cannot be used unless a certain fee is paid.

That is, conventionally, only users who set a DRM for digital content and pay a certain fee are allowed to use the purchased digital content. The digital content buyers use the digital content purchased by receiving DRM release help from the seller even after purchasing the purchased digital content.

On the other hand, the digital content for which the DRM is set, once the DRM is set, had to maintain the DRM set state permanently. However, the DRM is set to prevent arbitrary users from illegally using digital contents in relation to copyright. Therefore, only a legitimate user needs to release the DRM set for the digital content, and also needs to release the DRM set for the digital content whose copyright period has expired.

If the DRM is set in the digital content whose copyright period has expired, there is no way that general users who do not have permission from the company (or the producer) who set the DRM can use the digital content even if the copyright period has expired.

As described above, only the security authentication is performed according to the DRM setting for the management of the copyright of the digital content, and the post-management of the sold digital content is not performed. For example, even if the copyright period of the sold digital content has expired, the DRM of the digital content has not been released.

Therefore, even if digital content has expired, there is no way for general users who have not been authorized by the company (or creator) who set up the DRM to use the digital content whose expired copyright period because the DRM is not released. Due to such a problem, in the case of multimedia content whose copyright period has expired but DRM is set, a person who gains an unfair advantage by using a right of others or an extinct right occurs, and as a result, a victim of good faith has arisen.

Accordingly, the present invention has been proposed to solve the above problems, and has an object of providing a metadata format of a multimedia content file having a copyright due date metadata for the corresponding multimedia content for post management of the multimedia content. .

Another object of the present invention is to provide a metadata control method of a multimedia content file that can update copyright-related metadata included in a multimedia content file for post management of multimedia content.

It is still another object of the present invention to provide a method for controlling metadata of a multimedia content file capable of releasing DRM set in a multimedia content file by using copyright-related metadata included in the multimedia content file for post management of the multimedia content. The purpose is.

According to an aspect of the present invention, there is provided a method for controlling metadata of a multimedia content file, the method comprising: reading metadata containing copyright-related information of the multimedia content being recorded; A second step of calculating a copyright expiration date of the corresponding multimedia content based on the metadata read out in the first step and a pre-stored copyright law; And a third step of storing copyright expiration date information of the multimedia content in a metadata area.

The third step of the present invention is characterized by updating and storing the copyright expiration date of the multimedia content recalculated based on the updated copyright law.

The copyright law of the second step of the present invention is based on information previously stored in a memory.

Meta data control method of the multimedia content file according to the present invention for achieving the above object, in the method for metadata control of the multimedia content file between the server and the digital device, the metadata containing the copyright information provided by the digital device A first step of receiving data; A second step of checking a copyright period according to a copyright law corresponding to the multimedia content in a database of the server; Calculating a copyright expiration date of the corresponding multimedia content based on the received metadata and copyright law; And a fourth step of transmitting the copyright expiration date information of the multimedia content calculated in the third step to the digital device.

The present invention comprises the steps of comparing the copyright expiration date and the current date of the multimedia content calculated in the third step; And transmitting the DRM release control data for the DRM release to the digital device with respect to the multimedia content whose copyright expiration date has elapsed.

In order to achieve the above object, a method for controlling metadata of a multimedia content file according to the present invention includes a method for controlling metadata of a multimedia content file between a server and a digital device. A first step of reading the contained metadata; A second step of transmitting, to the server side, metadata containing the read copyright related information; A third step of receiving metadata containing the copyright related information and copyright expiration date information of the corresponding multimedia content calculated based on a copyright law checked in a database of a server; And a fourth step of storing copyright expiration date information of the multimedia content received in the third step in a metadata area of the multimedia content file.

The fourth step of the present invention is characterized by updating and storing the copyright expiration date of the multimedia content recalculated based on the updated copyright law.

The present invention comprises the steps of comparing the copyright expiration date and the current date of the multimedia content received in the third step; Receiving and storing the DRM release control information provided by the server for the multimedia content after the copyright expiration date has elapsed.

The stored DRM release control information of the present invention is stored in a memory and used when the corresponding multimedia content file is used.

The present invention is characterized in that it further comprises the step of confirming the authentication data between the server and the user of the digital device.

The present invention is characterized in that it further comprises the step of confirming the authentication data of the multimedia content file.

In order to achieve the above object, a metadata format of a multimedia content file according to the present invention includes: a first area in which general metadata is stored; And a second area in which copyright expiration metadata according to the recorded multimedia content is stored, and metadata stored in the second area is updated and stored.

Hereinafter, the metadata format of the multimedia content file, the metadata update method of the multimedia content file, and the metadata usage method of the multimedia content file will be described with reference to the accompanying drawings.

1 is a diagram illustrating a metadata format structure of multimedia content according to the present invention.

The multimedia content file contains various data. The data is divided into multimedia content data including video / audio / graphic data and metadata that is control information of the multimedia content data. The metadata may be used to reproduce title information, album information, artist / producer information, production date information, and other multimedia content data according to the location and contents of the content, information on the author, rights conditions, usage conditions, and usage history. General meta data including the control information is included.

Meta data format according to the present invention shown in Figure 1, the location and content of the content, information about the author, rights conditions, usage conditions, title information according to the usage history, album information, artist / author information, production date information And general meta data according to control information used when playing other multimedia content data, and further includes a storage area A capable of updating and storing information in accordance with the copyright period.

The metadata according to the copyright period stored in the storage area A is the copyright of the multimedia content determined according to the copyright period according to the characteristics of the media and the local characteristics at the time of formation (or sale) of the multimedia contents file. Indicate the deadline.

For example, in the case of music, a copyright period is set for 50 years after death of authors (writers, composers, arrangers, and singers) in Korea. Therefore, in the case of audio multimedia content that can be produced in Korea, it is stored in the storage area A on the assumption of a copyright expiration date according to the copyright period set in Korea (50 years after the author's death). However, in most audio multimedia contents, since the copyright is formed at the time the multimedia contents are formed, and the exact time of the author 50 years later is not known, it is necessary to update the metadata according to the copyright period later. have. In addition, since the copyright period determined in each country may vary depending on the revision of the law, it is necessary to update the metadata in accordance with the copyright period recorded in the multimedia contents according to the copyright period that changes.

Although music has been described above by way of example, in the game, movie, novel, and other multimedia contents, metadata update according to the copyright period is required for the same reason.

The metadata according to the copyright period stored in the storage area A is controlled to be updated and stored only when a specific authentication is passed. That is, the metadata according to the copyright period is metadata information (eg, production date, etc.) included in the metadata format and a corresponding region stored in the server while being connected to a server that permits specific authentication. The copyright expiration date is calculated and updated based on the copyright expiration date of the.

In the authentication, the metadata according to the copyright period is arbitrarily selected by the user or an unauthorized user who does not have permission from the server updates the metadata of the corresponding multimedia content and invades metadata such as the copyright period of the multimedia content. To prevent them.

In addition, based on the metadata according to the copyright period to be updated and stored, control such as DRM release set in the corresponding multimedia content file is performed. This part is described in detail below.

2 illustrates an overall configuration diagram for managing metadata of multimedia content according to the present invention.

2 shows the relationship between the server 10 and the digital devices 14, 16 and 18 of the user who holds the multimedia contents.

The server 10 includes a control configuration for updating and managing metadata included in the multimedia file. The server 10 includes a database 21 in which a copyright period is stored in a database by region, country, and medium. The media includes everything that is capable of multimedia content such as movies, TV dramas, other video contents, music, games, other audio products, and Internet books.

Accordingly, the server 10 calculates a copyright period of the multimedia content based on the copyright period information stored and provides the same to the user. At this time, the server 10 recognizes the copyright period determined for each region, country or medium, checks the meta information (production date) of the multimedia content owned by the user, and checks the media, country (region) of the multimedia content. Calculate the copyright period accordingly. On the user side, copyright period information calculated by the server 10 side is updated and stored in the storage area A of the copyright period included in the metadata format. To this end, the server 10 must always update and store the copyright period for each medium and region based on the latest information.

In addition, the server 10 requires an authentication procedure between the user and the user holding the multimedia content file in order to control and update the copyright period information of the multimedia file. At this time, it is checked whether the user has the right for the multimedia content file. In other words, it is necessary to confirm whether the corresponding multimedia content file is held by the user through a legitimate security authentication procedure. For example, the identification number and the like of the corresponding multimedia content file are checked, and whether or not the multimedia content file is sold through a proper procedure.

The server 10 controls to release the DRM set in the multimedia file when the copyright period of the multimedia file expires. To this end, control information for DRM release is exchanged between the server 10 and the user's digital device, which will be described later. For example, the server 10 provides the key information necessary for the DRM release and the algorithm for the DRM release to the user's digital device, thereby releasing the DRM set in the corresponding multimedia file from the user's digital device without any help. Do it.

In the process of releasing the DRM as described above, the authentication confirmation procedure between the owner of the multimedia content file and the server is performed. In this case, it is checked whether the user is a legitimate user or a multimedia content file sold through a legitimate security authentication procedure.

The configuration indicated by the reference numerals 14, 16 and 18 indicates a digital device possessed by the user. The digital device represents all digital devices capable of transmitting and receiving data to and from the server 10 via the network 12 and capable of playing multimedia content files. Thus, all digital devices are possible, including PDAs, DMB mobile phones, MP3 players, personal computers that can use multimedia files with metadata.

The digital devices of the user play the multimedia file owned by the user and exchange data with the server 10 for management of the multimedia file. The copyright period information provided by the server 10 is controlled to be updated and stored in the storage area A of metadata in the multimedia file.

In addition, the user's digital devices control to calculate the copyright expiration date of the corresponding multimedia content by using copyright period information according to the copyright law stored in its memory, and update and store in the metadata storage area A of the multimedia content file. It is possible to carry out. At this time, the copyright period information according to the copyright law stored in the memory needs to be updated and stored with the latest data provided from the outside.

That is, the digital devices 14, 16, and 18 are controlled by the server 10 to update and store copyright period data stored in the metadata storage area A in the multimedia content file, or calculate the data by themselves. It is possible to update and store the copyright term data in the metadata storage area A. FIG.

As described above, the digital devices can receive the information according to the DRM release from the server 10 and store it in their memory, and then control the DRM of the corresponding multimedia content file without external help. Do.

In addition, a connection between the server 10 and the users 14, 16, and 18 is made through the network 12. The network 12 is a configuration in which data can be transmitted and received between a digital device owned by a user and a server. For example, it represents a network capable of transmitting and receiving signals, such as the Internet, wired communication, and broadcast communication.

3 shows a detailed configuration diagram of the digital device 14 according to the present invention.

The digital device 14 shows an embodiment in which the server 10 and the internet module 22 are connected. And the digital device 14, the encoder 23 for performing the encoding to store the multimedia content file, authentication data, and various other data provided from the server 10 side through the Internet module 22 in the memory 24 And a decoder 26 for decoding in order to output various data stored in the memory 24, and a microcomputer 25 for controlling each configuration. Reference numeral 24 denotes a memory for storing various contents necessary for controlling the multimedia content file, the copyright period according to the copyright law, information for releasing DRM, control of authentication information or other digital devices, and metadata management of the multimedia content file. .

Next, an operation process for controlling metadata of the multimedia content file according to the present invention having the above configuration will be described in detail.

4 is a flowchart illustrating an operation of calculating and storing metadata of a multimedia content file in the digital device itself according to the present invention.

For this purpose, the memory 24 inside the digital device 14 stores information related to the copyright period. The information related to the copyright period is preferably updated with the latest information.

The microcomputer 25 reads the corresponding multimedia content file from the memory 24 or an external storage medium (not shown), and checks the copyright related metadata in the multimedia content file (S10).

The copyright-related metadata of the multimedia content file checked in step S10 is information capable of calculating a date at which copyright of the corresponding multimedia content is started from metadata information stored in the corresponding multimedia content file. For example, production date, album information, artist / author information, and the like included in general metadata.

Then, information related to the copyright law period stored in the memory 24 is checked (S11). At this time, it corresponds to the multimedia content read in step S10, and confirms the copyright law period determined in the country.

Next, the microcomputer 25 calculates a copyright expiration date of the corresponding multimedia content file by using copyright law period information read in steps S10 and S11 and copyright-related metadata read from the multimedia content file (S12). .

For example, in the case of audio multimedia content, the life time information (1935.1.8 ~ 1977.8.16) of the artist (Alvis) can be checked from the artist / author information. When the information thus confirmed and the period information (50 years later) of the Copyright Act are confirmed, the copyright period of the corresponding audio multimedia contents is August 15, 2027.

The metadata of the copyright period calculated as described above is stored in the area A in which the copyright period metadata is stored in the corresponding multimedia content file (S13).

Thereafter, the multimedia content file stored in the memory 24 or the external storage medium is in a state in which the copyright term metadata stored in the step S13 are included.

Metadata storage according to the copyright period of the multimedia content file according to FIG. 4 may be updated and stored when necessary.

For example, some countries adjust the duration of copyright law based on their content. At this time, copyright law period information stored in the memory in the digital device 14 is also changed. The copyright law period information change of the memory 24 is changed by receiving the changed copyright law period information from the server 10 or by a user's direct change. In this case, there is a need to update the copyright deadline metadata of the corresponding multimedia content file in accordance with the adjusted copyright law period.

Therefore, when the copyright law period information stored in the memory 24 is changed, the microcomputer 25 recalculates the copyright period of the corresponding multimedia content file according to the changed copyright law period, and updates and stores it in the metadata storage area A. Control will be performed.

The above-described digital device describes a process of storing period information related to copyright law in the memory 24 itself, and calculating the copyright period of multimedia content corresponding to the digital device itself.

However, it is generally inefficient to store copyright information related period information in the memory 24 inside the digital apparatus. This is because the period information related to the copyright law is used only when calculating the copyright period of the multimedia content as described above, and in other cases, there is little use value. Therefore, since the inefficiency of the information to be stored is large, it is sometimes high in efficiency to obtain and use necessary information from the outside.

Next, as shown in FIG. 6, a process of controlling metadata of the multimedia content file through connection with the server 10 will be described.

An authentication procedure is required between the server 10 and the digital device 14 to manage the multimedia content file (S30).

The authentication procedure is a process of confirming that the user is a legitimate user and a legitimate multimedia content file. The authentication procedure has a general digital authentication procedure, which is briefly described as shown in FIG. 5.

That is, a connection is established between the server 10 and the digital device 14 through the internet module 22 (S20), and an authentication relationship between the server 10 and the user is established through the digital device 14. (S21). The authentication relationship of step S21 is configured to confirm that the user is a legitimate user, a legitimate multimedia content file.

The authentication data constructed in the authentication relationship of step S21 is stored in each of the server 10 and the digital device 14 (S22). Preferably, the authentication data of step S22 is configured by dividing the authentication data for server connection, the authentication data for multimedia content file connection, and the like. The authentication data for accessing the server is authentication data for legitimate user confirmation, and the authentication data for accessing the multimedia content file is authentication data for confirming whether the multimedia content file is sold through a legitimate digital security authentication procedure.

After that, the authentication confirmation between the server 10 and the user is performed through the authentication data stored in the step S22.

When a valid authentication procedure is performed between the user and the server through the above process, a basic condition for managing metadata of the multimedia content file held by the user is formed.

The server 10 checks the copyright-related metadata in the multimedia content file held by the user (S31).

In step S31, under the control of the microcomputer 25, the multimedia content file stored in the memory 24 or the external storage medium is read, and the metadata information is read in the read multimedia content file and transmitted to the server 10.

The copyright-related metadata of the multimedia content file checked in step S31 is information capable of calculating a date at which copyright of the corresponding multimedia content is started from metadata information stored in the corresponding multimedia content file. For example, production date, album information, artist / author information, and the like included in general metadata.

The server 10 checks the information related to the copyright law period corresponding to the multimedia content provided in step S31 from the database 21 (S32). At this time, it corresponds to the multimedia content read in step S31, it is confirmed the period of copyright law determined in the country.

Then, the server 10 calculates the copyright expiration date of the corresponding multimedia content file by using the copyright law period information checked in steps S31 and S32 and the copyright-related metadata read from the multimedia content file, and calculates the user's digital expiration date. It transmits to the device 14 (S33).

The digital device 14 receives and encodes the copyright expiration metadata through the Internet module 22, and stores the copyright expiration metadata in the region A in which the copyright expiration metadata is stored (S34). .

Thereafter, the multimedia content file stored in the memory 24 or the external storage medium is in a state in which the copyright term metadata provided by the server 10 is included.

As shown in FIG. 6, the metadata storage according to the copyright period of the multimedia content file can be updated and stored when necessary under the control of the server.

For example, in some countries, the copyright law period may be adjusted according to contents. At this time, copyright law period information stored in the database 21 of the server 10 is also changed. In this case, there is a need to update the copyright deadline metadata of the multimedia content file in accordance with the adjusted copyright law period.

Therefore, when the copyright law period information stored in the database 21 is changed, the server 10, with respect to the multimedia content file of the user who passed the authentication verification procedure, the copyright period of the corresponding multimedia content file according to the changed copyright law period Recalculate and update and store in the metadata storage area (A).

Next, the metadata stored in the multimedia content file as described above includes copyright expiration date information. Therefore, it is necessary to release the DRM for the multimedia content file whose copyright has expired.

7 is a flowchart illustrating an operation using metadata of a multimedia content file according to the present invention.

An authentication procedure is required between the server 10 and the digital device 14 to manage the multimedia content file (S40).

The authentication procedure is a process of confirming that the user is a legitimate user and a legitimate multimedia content file. The authentication procedure has a general digital authentication procedure as shown in FIG.

The server 10 requests metadata according to the copyright period in the multimedia content file from the user whose authentication procedure is confirmed.

The microcomputer 25 reads the corresponding multimedia content file stored in the memory 24 or the external storage medium, reads the metadata information according to the copyright period in the read multimedia content file, and transmits it to the server 10 (S41). .

The server 10 compares the provided copyright period information with the current date (S42), and determines whether the copyright right period has ended (S43).

When the copyright right period ends in step S43, the server 10 transmits data (key information, algorithm, etc.) for releasing the DRM of the corresponding multimedia content file to the user (S44).

In the step S44, transmitting the data for SRM release to the user side is difficult to completely release it in the case of a general DRM configuration file, and performs DRM decryption only through a key for DRM decryption and an algorithm using the key. . Accordingly, the data for releasing the DRM provided in step S44 is information that allows the user to use the corresponding multimedia content file without the help of external help (server or file producer).

The user side receives the data for the DRM release through the Internet module 22, encodes the data through the encoder 23, and is linked with the corresponding multimedia content file under the control of the microcomputer 25 to schedule the memory 24. It is stored in the area (S45).

According to another embodiment of the present invention, the data for receiving the DRM is received, encoded through the encoder 23, and controlled to be stored in the header area of the multimedia content file under the control of the microcomputer 25. Do. Therefore, for multimedia content files whose respective copyright periods have expired, control data for releasing DRM is stored in a header area of each file, and upon playback of the multimedia content file, based on the DRM release control information stored in the header area. Control of file playback.

If the copyright right period has not ended in step S43, the server 10 does not provide the DRM release information to the user so that the DRM setting state can be maintained.

As described above, the metadata format and the metadata control method of the multimedia content file according to the present invention are characterized by being capable of updating and storing copyright term metadata in the multimedia content file. To this end, the present invention provides an algorithm for calculating the copyright expiration date of the multimedia content, and configures the update copyright expiration date metadata to be stored in a predetermined region of the multimedia content file. In addition, the present invention is characterized in that the DRM set for the multimedia content file whose copyright period has expired can be released using metadata of the multimedia content file. To this end, the present invention is configured to confirm the end of the copyright right period for the multimedia content file passed through the server and the authentication procedure, and to provide the user with data for DRM release for the multimedia content file for which the copyright right period has ended. .

The above-described preferred embodiment of the present invention has been disclosed for the purpose of illustration, and may be applied to storing and updating copyright expiration metadata in a multimedia content file. Therefore, those skilled in the art will be able to improve, change, substitute or add other embodiments within the technical spirit and scope of the present invention disclosed in the appended claims.

The metadata format and the metadata control method of the multimedia content file according to the present invention described above are characterized by being capable of updating and storing copyright term metadata in the multimedia content file. To this end, the present invention provides an algorithm for calculating the copyright expiration date of the multimedia content, and configures the update copyright expiration date metadata to be stored in a predetermined region of the multimedia content file. According to this configuration, the present invention can automatically update the copyright expiration metadata of the multimedia content file.

In addition, the present invention is characterized in that the DRM set for the multimedia content file whose copyright period has expired can be released using metadata of the multimedia content file. To this end, the present invention is configured to confirm the end of the copyright right period for the multimedia content file passed through the server and the authentication procedure, and to provide the user with data for DRM release for the multimedia content file for which the copyright right period has ended. . According to this configuration, the present invention can obtain the effect of preventing the third party from taking unfair advantage by using the rights of others or extinction.

Claims (13)

A first step of reading metadata containing copyright-related information of the recorded multimedia contents; A second step of calculating a copyright expiration date of the corresponding multimedia content based on the metadata read out in the first step and a pre-stored copyright law; And And a third step of storing copyright expiration date information of the multimedia content in a metadata area. The method of claim 1, The third step, the metadata control method of the multimedia content file, characterized in that for updating the copyright expiration date of the multimedia content recalculated based on the updated copyright law. The method of claim 1, The copyright method of the second step is based on information previously stored in a memory. A method for controlling metadata of a multimedia content file between a server and a digital device, A first step of receiving metadata containing copyright-related information provided by the digital device; A second step of checking a copyright period according to a copyright law corresponding to the multimedia content in a database of the server; Calculating a copyright expiration date of the corresponding multimedia content based on the received metadata and copyright law; And And transmitting a copyright expiration date information of the multimedia content calculated in the third step to a digital device. The method of claim 4, wherein Comparing a copyright expiration date and a current date of the multimedia content calculated in the third step; And transmitting the DRM release control data for the DRM release to the digital device with respect to the multimedia content whose copyright expiration date has elapsed. A method for controlling metadata of a multimedia content file between a server and a digital device, A first step of reading metadata containing copyright related information stored in a multimedia content file; A second step of transmitting, to the server side, metadata containing the read copyright related information; A third step of receiving metadata containing the copyright related information and copyright expiration date information of the corresponding multimedia content calculated based on a copyright law checked in a database of a server; And storing a copyright expiration date information of the multimedia content received in the third step in a metadata area of the multimedia content file. The method of claim 6, The fourth step, the metadata control method of the multimedia content file, characterized in that for updating the copyright expiration date of the multimedia content recalculated based on the updated copyright law. The method of claim 6, Comparing a copyright expiration date and a current date of the multimedia content received in the third step; Receiving and storing the DRM release control information provided by the server for the multimedia content after the copyright expiration date has elapsed, the metadata control method of the multimedia content file. The method of claim 8, The DRM release control information is stored in a memory and used when the corresponding multimedia content file is used. The method of claim 8, The DRM release control information is stored in the header area of the corresponding multimedia content file. The method according to claim 4 or 6, And confirming authentication data between the server and the user of the digital device. The method according to claim 4 or 6, And identifying the authentication data of the multimedia content file. A first area in which general metadata is stored; A second area in which copyright expiration metadata according to the multimedia content being recorded is stored; The metadata stored in the second area is updated and stored. The metadata format of the multimedia content file.

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