KR20080049487A - Multimedia contents providing server and method for providing metadata, and webhard server and method for managing files using the metadata - Google Patents

Abstract

A method for providing metadata, a multimedia contents providing server, and a method and a web-hard server for managing files with the same are provided to minimize personal or social expenses by providing the correct metadata for various multimedia files accessible through the Internet. A database(11) stores multimedia files including multimedia data and metadata. A transceiver(12) receives audio information of a predetermined length, a time code corresponding to a playback section of the audio information, and an entire playback time from the external application. A sound source detector(13) extracts a multimedia file, which corresponds to the playback time within an allowance level of a difference between the playback time and the entire playback time, from the database. A similarity calculator(14) calculates similarity to the received audio information by extracting audio data corresponding to the time code from the extracted multimedia file. A sound source determiner(15) determines the most similar audio data based on the similarity and transmits the metadata of the multimedia file including the determined audio data to the external application through the transceiver.

Description

Multimedia Contents Providing Server and Method for Providing Metadata, and Webhard Server and Method for Managing Files using the Metadata}

1 is a schematic block diagram showing a conventional file management system of a web hard server that manages the same multimedia file in a superimposed manner.

2 is a schematic diagram showing a network connection for explaining an embodiment according to the present invention;

3 is a schematic block diagram of a multimedia content providing server according to an embodiment of the present invention;

4 is a schematic block diagram of a web hard server according to an embodiment of the present invention;

5 is a flowchart illustrating a file management method in a web hard server according to an embodiment of the present invention;

6 is a flowchart illustrating a metadata providing method in a multimedia content providing server according to an embodiment of the present invention; And

7 is a block diagram schematically illustrating a file management system in a web hard server according to an embodiment of the present invention.

The present invention relates to a multimedia content providing server and a method for providing metadata included in a complete multimedia file through the same, and also to a web hard server and a method for efficiently managing a file in conjunction with these.

The sound source includes audio data representing music and a metadata format corresponding to a header. The typical metadata format is ID3, which is used in MP3 files. The metadata stored according to the ID3 format may be, for example, a music title string, a singer string, a record string, a record release string, a genre, a song number, a remark string, a "tag" recognition string, a conductor, a reverberation setting, an image, a volume, a lyrics. Etc., depending on the version, the included contents are different, and some are not compatible with each other.

On the other hand, as data sharing through the Internet has become commonplace, illegal sound copying is widely used. Such illegal sound source copying generally causes various modifications to the sound source. For example, the metadata about a record, a singer, a genre, a song number, a conductor, or the like may be deleted or changed into incorrect information, or the song name may be changed and reproduced widely.

As the metadata of the sound source changed, enthusiasts who wanted to enjoy the music listened to the duplicated music with the wrong information. This generally occurs when P2P program operators download music files with modified metadata or download music files with incomplete metadata. In addition, because of the false metadata, P2P program users suffer a lot of time and material damage in downloading unwanted files.

This metadata change problem is not limited to the music field. From movies or videos produced by the general public, the same problems as described above are occurring, and it is also difficult to manage the web hard, which is widely used recently.

1 is a schematic block diagram showing a conventional file management system of the web hard server 100 for managing the same multimedia file in a superimposed manner.

Referring to FIG. 1, it can be seen that a plurality of users access the web hard server 100 to store individual files. If a plurality of users want to store the same music, that is, if they want to store the music file "A" in common, it can be seen that duplicate recording and storing as many as the number of users uploading the same multimedia file are inevitable. In particular, if the metadata is changed to have different metadata from the original sound source, the web hard server 100 may not even understand that the same audio data are recorded in a superimposed manner.

Therefore, providing the correct metadata about the sound sources owned by each individual may save a lot of money in terms of storing or operating the sound sources as well as in terms of society.

Therefore, it is an object of the present invention to provide the correct metadata for various multimedia files accessible via the Internet to minimize the cost of personal or social consumption.

In accordance with another aspect of the present invention, there is provided a metadata providing method through a multimedia content providing server, wherein a database storing a plurality of multimedia files including multimedia data and metadata is transmitted and received for data transmission and reception with an external application. Providing wealth; Receiving audio information of a predetermined length, a time code corresponding to a playback section of the audio information, and a reproduction time of the entire file including the audio information from the external application through the transceiver; Extracting, from the database, a multimedia file having a reproduction time in which a deviation from the received total reproduction time is within a predetermined allowable level; Extracting audio data corresponding to the time code from the multimedia data included in the extracted multimedia file to calculate a predetermined similarity with the received audio information; Determining audio data closest to the received audio information based on the similarity; And transmitting metadata of the multimedia file including the determined audio data to the external application through the transceiver.

Here, the multimedia file stored in the database is preferably a sound source obtained a license from the copyright holder and the neighboring copyright holder. The extracting of the audio data corresponding to the time code from the extracted multimedia data and calculating a predetermined similarity with the received audio information may include calculating a search time code extended before and after the time code. ; Extracting audio data corresponding to the search timecode; And shifting the extracted audio data by a segment unit corresponding to the time code, and calculating the similarity with the received audio information.

In addition, according to another aspect of the present invention, the present invention provides a web hard server including a separate memory for storing a plurality of personal files uploaded from a plurality of users, for connecting to the transceiver of the multimedia content providing server Data communication unit; A shared memory for storing multimedia files commonly stored for a plurality of users; An audio analysis unit for extracting a total playing time of a multimedia file uploaded from a user, a predetermined representative melody corresponding to audio information, and a time code of the representative melody; A duplicate file inspecting unit determining whether a file corresponding to the uploaded multimedia file is stored in at least one of the shared memory and the individual memory based on the total playing time and the representative melody from the audio analyzing unit; And when it is determined that the file corresponding to the uploaded multimedia file is not stored in the shared memory and the individual memory, the duplicate file inspecting unit displays the total playing time, the representative melody, and the time code in the first communication unit. The present invention relates to a web hard server, comprising: a file management unit configured to transmit to the multimedia content providing server and to receive predetermined metadata in response thereto and store the metadata to be included in the uploaded multimedia file. .

If the file manager determines that a file corresponding to the uploaded multimedia file is stored in the shared memory, the file manager calls a multimedia file stored in the shared memory in place of the uploaded multimedia file. Link as possible; If the duplicate file checker determines that a file corresponding to the uploaded multimedia file is stored in the individual memory, the multimedia file stored in the individual memory is stored in the shared memory, and instead of the uploaded multimedia file. It is desirable to link to be called.

In addition, according to another aspect of the present invention, the present invention is a multimedia file management method in a web hard server including a separate memory for storing individual files for a plurality of users, the common storage for the plurality of users Providing a data memory for connecting to an external server for providing metadata of a sound source and a shared memory for storing multimedia files; Extracting a total playing time of a multimedia file uploaded from a user, a predetermined representative melody corresponding to audio information, and a time code of the representative melody; Determining whether a file corresponding to the uploaded multimedia file is stored in the shared memory and the individual memory based on the total playing time and the representative melody; If it is determined that a file corresponding to the uploaded multimedia file is not stored in the shared memory and the individual memory, the total reproduction time, the representative melody and the time code are transmitted to the external server through the data communication unit. Making; Receiving metadata of the party sound source received from the external server and storing the metadata in the individual memory to be included in the uploaded multimedia file; Linking the multimedia file stored in the shared memory to be called in place of the uploaded multimedia file when it is determined that a file corresponding to the uploaded multimedia file is stored in the shared memory; And when it is determined that a file corresponding to the uploaded multimedia file is stored in the individual memory, storing the corresponding file on the individual memory in the shared memory, and linking to be called in place of the uploaded multimedia file. It relates to a multimedia file management method in a web hard server comprising a.

Hereinafter, with reference to the accompanying drawings to describe the present invention in more detail.

2 is a schematic diagram showing a network connection state for explaining an embodiment according to the present invention.

Referring to FIG. 2, it can be seen that the servers that provide a plurality of users and various services through the Internet are connected to the multimedia content providing server 10, the web hard server 20, and the P2P server 30. .

The multimedia content providing server 10 is a server for providing multimedia content. For example, the server may be a server that provides various music files and / or movie files for a fee. In particular, it is preferable that the server is a service providing server that has a valid sound source permission from a copyright holder and a neighboring copyright holder. Accordingly, the multimedia content providing server 10 provides a genuine product for various sound sources and video objects, and metadata included therein also maintains original information.

The web hard server 20 provides a user with a storage medium that can store and access files regardless of time and place through the Internet. The user can access Webhard anytime, anywhere on the Internet, to upload or download his personal files. In particular, the web hard server 20 is useful when groups working in collaboration share data.

The P2P server 30 is a server that receives search information to be searched by accessors and finds files corresponding to the search information among shared files provided by other accessors and provides them to the searcher. Once the searcher selects a particular file, a direct file transfer begins between the searcher and the file provider.

In the present embodiment, the first to fourth users 1 to 4 of the first to fourth users 1 to 4 are service users of the web hard server 20, and the second and third users 2 and 3. Is connected to the P2P server 30, and the fourth user 4 is listening to music through the personal multimedia file player.

Hereinafter, referring to FIG. 2, the configuration of the multimedia content providing server 10 and the web hard server 20 and a control method thereof according to an embodiment of the present invention will be described in detail below.

3 is a schematic block diagram of a multimedia content providing server 10 according to an exemplary embodiment of the present invention. General configuration and operation of the server related to a service for providing multimedia contents for a fee or free of charge will be omitted, and descriptions will be made based on the embodiments related to the present invention.

Referring to FIG. 3, the multimedia content providing server 10 of the present embodiment includes a database 11, a transceiver 12, a sound source detector 13, a similarity calculator 14, and a sound source determiner 15. .

The database 11 stores a plurality of multimedia files including multimedia data and metadata. Particularly, it is preferable to store multimedia files as genuine products for various sound recordings and images obtained by legitimate authors and neighboring copyright holders. Of course it can.

Here, the multimedia data represents data related to reproduction of songs, pop songs, classical music, traditional music, movies, and moving pictures. Thus, in the case of a movie, the multimedia data may be understood to include image data and sound data.

Metadata includes music title strings, singer strings, record strings, record release strings, genres, song numbers, note strings, "tag" recognition strings, conductors, reverberation settings, images, volume, lyrics, and the like. It may be in accordance with the ID3 format as shown.

The transceiver 12 is composed of communication means capable of transmitting and receiving data with an external application through a network such as the Internet. It will be appreciated that an appropriate communication means may be selected depending on the network. Here, communication with an external application is related to requesting and receiving specific metadata. In other words, it is related to receiving the total reproduction time of a specific multimedia file, audio information of a predetermined length, and a time code of the audio information from an external application, and searching and returning metadata corresponding thereto. Therefore, the external application may be implemented by various equipment and software for providing and receiving such information. For example, the external application may be implemented by the web hard server 20, music and video player, P2P program, and the like described below.

The sound source detection unit 13 extracts a multimedia file having a playback time similar to the entire playback time from the database 11. Preferably, in view of the fact that the total playing time may be changed somewhat, if the deviation between the total playing time received and the playing time of the multimedia file stored in the database 11 is within a predetermined allowable range, the multimedia to be searched for is searched. Select as a file candidate.

The similarity calculating unit 14 calculates the similarity in order to find a multimedia file having audio data most similar to the received audio information among the multimedia files extracted first through the sound source detecting unit 13. In this case, the degree of similarity means that the degree of similarity is expressed numerically by an objective criterion, and in the case of a digital sound source displayed by the PCM method, the degree of similarity between specific parts is expressed numerically.

According to the general composition method, there is a representative melody repeated two or three times in a song, and this melody shows the highest peak or forms the main melody. Since the representative melody acts as a fingerprint that characterizes and distinguishes the music, it is possible to detect the representative melody and determine whether it is the same song depending on whether or not there is a similar melody.

As an algorithm related to this, it is possible to use a conventional DTW (Dynamic Time Warping) technique consisting of preprocessing, pre-emphsis, window, FFT, Mel Filter bank, logging, DCT, feature extraction and the like. DTW was an algorithm used for speech recognition in the past. Although the similarity between the input voice and the basic data stored in the database was measured, DTW can also be used to compare the digital sound source of the complex sound type based on the auditory model. That is, the similarity may be measured by extracting feature vectors from data having waveform information and comparing them.

Those skilled in the art will appreciate that it is possible to detect similarities between waveforms using various techniques in addition to the already known DTW. For example, the degree of similarity may be calculated by comparing the sound widths in the same time interval and digitizing the average value of the deviations. It is also possible to quantify the degree of change in the waveform size, that is, to quantify the derivatives of the waveforms, and to calculate the deviation of these derivatives between files with similarity.

Accordingly, the similarity calculating unit 14 extracts audio data of the section corresponding to the time code of the received audio information from the first extracted multimedia file, and then calculates the similarity therebetween. Preferably, the received audio information is a representative melody of the multimedia file, and the time code means information on the reproduction section of the representative melody counted from the time of reproduction. In the case of a movie or a moving picture, if the audio information cannot be regarded as including the representative melody, it is possible to select the audio information of a specific time code as the representative melody. As such, the audio information selected for the multimedia file related to the movie or video is also referred to as "representative melody" below.

The sound source determining unit 15 determines audio data closest to the received audio information based on the similarity from the similarity calculating unit 14, and transmits and receives the metadata of the multimedia file including the determined audio data. Send to external application via.

Here, the evaluation of the similarity may be variously applied according to the measuring method of the similarity. For example, if the similarity is calculated as the sum or average of the distances between the vectors, the calculated similarity may be evaluated as the same as the representative representative melody received. In addition, the magnitudes and derivatives of the waveforms as described above may be evaluated as the same.

When the most similar audio data and the multimedia file are determined, the metadata stored in the multimedia file is transmitted to the external application through the transceiver 12.

A detailed operation of the multimedia content providing server 10 disclosed in FIG. 3 will be described later. First, the configuration of the web hard server 20 operating in conjunction with this will be described with reference to FIG. 4.

4 is a schematic block diagram of a web hard server 20 according to an exemplary embodiment of the present invention.

4, the web hard server 20 of the present embodiment includes a shared memory 21, an individual memory 22, a data communication unit 23, an audio analysis unit 24, a duplicate file inspection unit 25, and a file management unit. (26).

The shared memory 21 is a storage medium used for storing files uploaded by a plurality of users in common, that is, files which are marked as owned individually but are actually stored in a form of sharing one file.

Unlike the shared memory 21, the individual memory 22 is a storage medium for storing individually owned files. The shared memory 21 and the individual memory 22 may be implemented as separate hard disks. It is implemented as a hard disk of, but can be distinguished and managed in units of segments. The multimedia files stored in the shared memory 21 and the individual memory 22 are files modified to include correct metadata through a procedure as described below, and are classified according to storage media according to sharing between users.

The data communication unit 23 is a means capable of transmitting and receiving data by connecting to a network such as the Internet. In particular, it is provided for accessing a plurality of users' PCs and the multimedia content providing server 10 of FIG.

The audio analyzer 24 extracts the total playback time, representative melody and corresponding time code of the multimedia file uploaded from the user and received through the data communication unit 23. Since the extraction technique of the representative melody is already known, a detailed description thereof will be omitted. Details of this can be found through various sources, for example, the Journal of Information Processing Society, ABCD, 11-D, 3, pp 495-508.

The duplicate file inspecting unit 25 checks whether the uploaded multimedia file is duplicated with the file stored in the shared memory 21 or the individual memory 22. As the inspection method, the determination method of the sameness or not made through the sound source detection unit 13, the similarity calculation unit 14, and the sound source determination unit 15 in Fig. 3 is adopted as it is. Therefore, based on the total playback time extracted from the audio analyzer 24, the multimedia file having the most similar playback time is first extracted from the shared memory 21 and the individual memory 22, and secondly, the time code is extracted. By extracting the audio data corresponding to and calculating the similarity with the analyzed representative melody, it is possible to know whether the upload file is already stored in the shared memory 21 or the individual memory 22.

The file management unit 26 determines the storage state of the upload file according to the inspection result of the duplicate file inspection unit 25. If the upload file is a new file that has not been stored, it is stored in the individual memory 22 corresponding to the user. On the other hand, if the file is already stored in the shared memory 21 or the individual memory 22, only the link is set so that the corresponding file is called in the shared memory 21 when called from any user. That is, if the uploaded file is a file stored in another user's individual memory 22, the file is stored in the shared memory 21, but the correct metadata is added so that the stored file is stored in the shared memory 21. Only set the link.

5 is a flowchart illustrating a file management method in the web hard server 20 according to an embodiment of the present invention, and FIG. 6 is a metadata providing method in the multimedia content providing server 10 according to an embodiment of the present invention. Is a flowchart.

5 and 6, an operation of linking between the multimedia content providing server 10 and the web hard server 20 illustrated in FIGS. 3 and 4 will be described in detail.

First, referring to FIG. 5, a web hard server 20 including a shared memory 21 and a data communication unit 23 as shown in FIG. 4 is prepared (T1). When a user of the web hard server 20 wants to upload a multimedia file, the file is transmitted through the Internet.

When the upload file is received through the data communication unit 23, the audio analyzer 24 extracts the total reproduction time, representative melody and time code from the upload file (T2). Here, it is preferable to extract the data of the representative melody by limiting it to a predetermined length, for example, 5 seconds.

The upload file will not necessarily need to be processed through the audio analyzer 24 as soon as it is received from the user. The uploaded file is first stored in the individual memory 22 corresponding to the user through the file management unit 26, and then, when the load on the server 20 is small, it is preferable to perform the steps of T2 to T6.

The duplicate file checking unit 25 checks whether the upload file is the same as the file already stored in the shared memory 21 or the individual memory 22 based on the extracted information (T3). As described above, the multimedia file that is a candidate is first extracted based on the playback time, and the same file is determined from the extracted multimedia files based on the similarity. The similarity can be determined based on the amplitude, derivative, etc. of the waveform, and it is possible to apply the DTW technique.

If the upload file is found to be a file already stored in the shared memory 21 or the individual memory 22, the file management unit 26 discards the uploaded file, and then, when the file is called from the user, the corresponding shared memory ( The link information is stored so that the file 21) is called (T4). That is, if it is found that the same as the file previously stored in the individual memory 22, the file is stored in the shared memory 21 to be shared to a plurality of users.

On the other hand, if the upload file is not a file stored in the individual memory 22 and the individual memory 22, the file management unit 26 extracts the extracted information, that is, the total play time, representative tune rate, so that the uploaded multimedia file has the correct metadata. And the time code is transmitted to the multimedia content providing server 10 of FIG. 3 via the data communication unit 23 (T5).

 Referring to FIG. 6, the multimedia content providing server 10 includes a database 11, a transceiver 12, and the like for a genuine multimedia file in advance (S1). Therefore, the multimedia file stored in the database 11 includes multimedia data and metadata corresponding to a genuine product, and a plurality of multimedia files are stored in the database 11.

The entire playback time, representative melody and time code are received from the web hard server 20 through the transceiver 12 (S2).

The sound source detection unit 13 extracts a multimedia file having a similar playback time from the database 11 based on the received total playback time. As described above, multimedia files having a reproduction time whose deviation from the received total reproduction time are within an allowable range are primarily selected as candidate files (S3).

The similarity calculating unit 14 extracts audio data of a section corresponding to the time code from the multimedia files primarily extracted through the sound source detecting unit 13. In this case, it is desirable to compensate for the change in time code due to the difference in reproduction time.

That is, when the received time code is received in, for example, a 15 to 20 second interval counted from the time of reproduction, the similarity calculation unit 14 calculates a time code for searching for an appropriately extended 10 to 25 second interval corresponding thereto. (S4).

Then, audio data corresponding to the search time code is extracted from the firstly extracted multimedia files (S5).

In order to calculate the similarity between the extracted audio data and the received representative melody, a segment of 5 seconds corresponding to the length of the representative melody is selected in the audio data, and the similarity between the segment of the selected audio data and the representative melody is calculated ( S6). Since an infinite number of segments can be selected in the audio data, it is preferable to select a plurality of segments while moving the segments at predetermined intervals, for example, at 0.1 or 0.2 second intervals.

Similarity is calculated for each of the plurality of segments, and the similarity calculation result evaluated as the most similar is determined as the similarity with respect to the corresponding audio data (S6).

When the similarity is calculated for all audio data extracted from the at least one multimedia data, the sound source determination unit 15 determines which audio data is closest to the representative melody based on the similarity (S7).

 The sound source determiner 15 transmits the metadata of the multimedia including the determined audio data to the web hard server 20 through the transceiver 12 (S8).

Referring back to FIG. 4, the file management unit 26 of the web hard server 20 receives metadata transmitted from the multimedia content providing server 10 through the data communication unit 23 (T6). The received metadata is stored in the metadata portion of the upload file and stored in the individual memory 22 together with the upload file (T7).

7 is a block diagram schematically illustrating a file management system in the web hard server 20 according to an exemplary embodiment of the present invention.

As shown in Fig. 7, files stored by a plurality of users individually, for example, music files X to Z, are stored in individual memories 22, but music file A shared between users is shared memory 21. ) To avoid storing duplicate files for the same file.

Accordingly, the web hard server 20 may store metadata stored in the genuine sound source in addition to the multimedia file, thereby providing accurate information to users who use the multimedia file, as well as to files that have different metadata. Integrated management is possible. In addition, it is possible to avoid the duplicate file storage for the files commonly used to reduce the storage space, thereby reducing the cost of the system.

3 to 6 illustrate only the interlocking relationship between the multimedia content providing server 10 and the web hard server 20, but are an external application interworking with the multimedia content providing server 10. Multimedia file players such as players and P2P programs may also be used.

When the fourth user of FIG. 2 activates the multimedia file player and selects multimedia files to be played, the multimedia file player extracts the total play time, representative melody and time code of the selected multimedia file and provides the extracted information to the multimedia content. Transfer to server 10. The metadata provided in response thereto is received and stored in the multimedia file.

Similarly, when the second and third users of FIG. 2 execute the P2P program and store the files to be shared in the shared folder, the P2P program displays the total playing time, the representative melody and the time code for the files designated as the shared files. After extraction, the extracted information is transmitted to the multimedia content providing server 10. The metadata provided in response thereto is received and stored in the multimedia file.

This allows the correct metadata for the multimedia files to be set so that the player users can use the multimedia file with the correct information. In addition, P2P program users will be more trusted with shared files and will be able to avoid downloading unnecessary files based on incorrect information.

Up to now, the embodiment according to the present invention has been described in detail, but the present invention is not limited thereto. The spirit of the invention is defined by the invention as set forth in the claims, and should be understood to include equivalents thereof. In addition, although various modifications within the technical idea of the present invention are possible, those skilled in the art will readily understand that it belongs to the scope of the present invention.

As described above, the present invention not only provides accurate information to users who use the multimedia file, but also enables integrated management of files whose metadata is differently treated.

In addition, in the case of the web hard server, it is possible to avoid the duplicate file storage for the files commonly used, thereby reducing the storage space, thereby reducing the cost of the system.

In addition, in the file sharing through the Internet, it is possible to increase the reliability of the shared files by inducing the correct metadata, and to accurately find the files you are looking for can reduce the time and material cost of personal or social consumption .

Claims (6)

In the metadata providing method through a multimedia content providing server, Providing a database for storing a plurality of multimedia files including multimedia data and metadata and a transceiver for transmitting and receiving data with an external application; Receiving audio information of a predetermined length, a time code corresponding to a playback section of the audio information, and a reproduction time of the entire file including the audio information from the external application through the transceiver; Extracting, from the database, a multimedia file having a reproduction time in which a deviation from the received total reproduction time is within a predetermined allowable level; Extracting audio data corresponding to the time code from the multimedia data included in the extracted multimedia file to calculate a predetermined similarity with the received audio information; Determining audio data closest to the received audio information based on the similarity; And And transmitting the metadata of the multimedia file including the determined audio data to the external application through the transceiver. The method of claim 1, The multimedia file stored in the database is a metadata providing method characterized in that the sound source obtained a license from the copyright holder and neighboring copyright holder. In the multimedia content providing server, A database for storing a plurality of multimedia files including multimedia data and metadata; A transmission / reception unit capable of transmitting / receiving data with an external application, and receiving a time code corresponding to a reproduction length of the audio information and a reproduction section of the audio information from the external application and a total reproduction time; A sound source detection unit for extracting the multimedia file having a reproduction time in which the deviation from the received total reproduction time corresponds to a predetermined tolerance level from the database; A similarity calculation unit for extracting audio data corresponding to the time code from the extracted multimedia file through the sound source detection unit and calculating a predetermined similarity with the received audio information; And Determine audio data closest to the received audio information based on the similarity from the similarity calculating unit, and transmit metadata of the multimedia file including the determined audio data to the external application through the transceiver. Multimedia content providing server comprising a sound source determination unit. In the web hard server including a separate memory for storing a plurality of personal files uploaded from a plurality of users, A data communication unit for accessing a transceiver of the multimedia content providing server of claim 3; A shared memory for storing multimedia files commonly stored for a plurality of users; An audio analysis unit for extracting a total playing time of a multimedia file uploaded from a user, a predetermined representative melody corresponding to audio information, and a time code of the representative melody; A duplicate file inspecting unit determining whether a file corresponding to the uploaded multimedia file is stored in at least one of the shared memory and the individual memory based on the total playing time and the representative melody from the audio analyzing unit; And If the duplicate file checker determines that a file corresponding to the uploaded multimedia file is not stored in the shared memory and the individual memory, the first communication unit displays the total playing time, the representative melody, and the time code. Web hard server, characterized in that for transmitting to the multimedia content providing server, in response to receiving the predetermined metadata to store the metadata in the individual memory to be included in the uploaded multimedia file; . The method of claim 4, wherein The file management unit, If the duplicate file checker determines that a file corresponding to the uploaded multimedia file is stored in the shared memory, the multimedia file stored in the shared memory is called in place of the uploaded multimedia file; If the duplicate file checker determines that a file corresponding to the uploaded multimedia file is stored in the individual memory, the multimedia file stored in the individual memory is stored in the shared memory, and instead of the uploaded multimedia file. Web hard server, characterized in that the link to be called. In the multimedia file management method in a web hard server including a separate memory for storing individual files for a plurality of users, Providing a data memory for accessing a shared memory for storing multimedia files commonly stored for the plurality of users and an external server for providing metadata of a sound source; Extracting a total playing time of a multimedia file uploaded from a user, a predetermined representative melody corresponding to audio information, and a time code of the representative melody; Determining whether a file corresponding to the uploaded multimedia file is stored in the shared memory and the individual memory based on the total playing time and the representative melody; If it is determined that a file corresponding to the uploaded multimedia file is not stored in the shared memory and the individual memory, the total reproduction time, the representative melody and the time code are transmitted to the external server through the data communication unit. Making; Receiving metadata of the party sound source received from the external server and storing the metadata in the individual memory to be included in the uploaded multimedia file; Linking the multimedia file stored in the shared memory to be called in place of the uploaded multimedia file when it is determined that a file corresponding to the uploaded multimedia file is stored in the shared memory; And If it is determined that a file corresponding to the uploaded multimedia file is stored in the individual memory, storing the corresponding file on the individual memory in the shared memory, and linking to be called in place of the uploaded multimedia file. Multimedia file management method in a web hard server comprising a.

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