KR100749731B1 - Method for providing mobile terminal with multimedia file and pre-play key - Google Patents

Abstract

A method for providing a mobile terminal with a multimedia file and a pre-play key is provided to search a desired multimedia file during a movement and to previously reproduce the desired multimedia file without an excessive data communication fee. A method for providing a mobile terminal with a multimedia file and a pre-play key includes the steps of: encoding the multimedia file to store the encoded multimedia file; receiving a multimedia file request message including a multimedia file selection standard from a user's terminal(200); searching the encoded multimedia file matched with the multimedia file selection standard; and transmitting the searched and encoded multimedia file and the pre-play key for the searched and encoded multimedia file to a wireless terminal(300) through the user's terminal(200).

Description

METHOOD FOR PROVIDING MOBILE TERMINAL WITH MULTIMEDIA FILE AND PRE-PLAY KEY}

1 is a schematic block diagram of a sound source providing system according to an embodiment of the present invention.

2 is a detailed block diagram of a sound source providing server according to an exemplary embodiment of the present invention.

3 is a detailed block diagram of a user terminal according to an embodiment of the present invention.

4 is a diagram illustrating an exemplary screen of an automatic download agent according to an embodiment of the present invention.

5 is a detailed block diagram of a wireless terminal according to an embodiment of the present invention.

6 is a diagram illustrating an example of a sound source search screen according to an embodiment of the present invention.

7 is a diagram illustrating an example of a preview screen according to an embodiment of the present invention.

8 is a signal flowchart illustrating a sound source and a license key providing method according to an embodiment of the present invention.

* Explanation of symbols in the main part of the drawing *

100: sound source server 200: user terminal

300: wireless terminal 400: network

The present invention relates to a method for providing a multimedia file to a wireless terminal, and in particular, after receiving an encrypted multimedia file and a pre-play key in advance, and receiving a multimedia file purchase request, It relates to a method of transferring a license key.

Mobile communication service has grown quantitatively and qualitatively to provide various multimedia contents in addition to basic calling service. Especially, the younger people have been widely recognized that mobile terminal is a means to enjoy entertainment. The value-added service business using the terminal is actively being developed.

One of the areas of greatest interest among these new service areas is the music field, and new music-related services such as ringtones, coloring, MP3 file downloads, and introduction of new albums are continuously being developed and distributed.

However, as all of the content is digitized, digital content is copied and distributed online to violate the rights of the copyright holders. Accordingly, copyright protection policies are being implemented through the introduction of digital right management (DRM) solutions, and the adoption of DRM solutions for copyright protection is becoming common in various media industries around the world.

A conventional method of purchasing and playing a multimedia file, for example, a sound source, in a wireless terminal using the DRM technology is as follows.

The user transmits a download request for the sound source selected by the user to the content providing server through a wireless terminal such as a mobile phone and pays for the sound source. The content providing server checks whether the requested sound source is paid, and then encrypts the sound source and transmits the sound source to the wireless terminal with the restoration information. The wireless terminal reproduces the sound source by decrypting the encrypted sound source using the transmitted restoration information.

However, according to the related art, a user accesses a content providing server to search for a sound source, listens to some of the found sound sources, selects a sound source to purchase, pays for the selected sound source, and downloads the corresponding sound source. There is a problem that excessive data charges are imposed because the entire process is made by data calls.

 Therefore, in order not to pay excessive data call charges, the following conventional techniques are actively used.

The user accesses an internet network operated by a flat rate using a personal computer and the like, searches for multimedia files, for example, a sound source, listens to some of the found sound sources, and selects a sound source to purchase. Then, the payment is made for the selected sound source, and the corresponding sound source is downloaded.

Thereafter, the sound source downloaded to the personal computer is transferred to a portable terminal capable of playing music using a USB interface or the like.

According to the above method, since the sound source can be purchased using the internet network operated at a flat rate and downloaded again to the mobile terminal, there is an advantage that an excessive data call fee is not charged.

However, the above-described method is very inconvenient because the user cannot purchase multimedia files such as a sound source through a wireless terminal anytime, anywhere while moving, and must purchase a multimedia file by accessing an internet network operated at a flat rate on a personal computer. There was this.

In other words, in order to download the desired multimedia file, turn on the computer, run the program to search for the multimedia file, select the desired multimedia file, play it in advance, and download it by making a payment. It is very inconvenient because it has to go through the process of receiving a multimedia file by connecting a computer, there was a problem that takes too much time.

In addition, due to the nature of the multimedia content, it takes time to play in advance in the search and purchase phase, and the prior art takes such a pre-play time in a limited space where a computer is installed. There was a problem acting as a constraint.

Therefore, there is an urgent need for the development of a technology that can conveniently purchase multimedia files anytime and anywhere without paying expensive data calls.

The present invention provides a system and method that can conveniently and conveniently purchase a multimedia file anytime, anywhere without paying excessive data calls in order to solve the problems of the prior art described above.

In addition, the present invention provides a system and method for searching, pre-playing multimedia files, and purchasing multimedia files in a wireless terminal without limiting the place without paying excessive data calls.

As a technical means for achieving the above object, a first aspect of the present invention provides a method for providing a multimedia file to a wireless terminal by the multimedia file providing server, (a) encrypting and storing the multimedia file, (b) Receiving a multimedia file request message including a multimedia file selection criterion from a user terminal, (c) retrieving an encrypted multimedia file matching the multimedia file selection criterion, and (d) the retrieved encrypted multimedia file And transmitting a pre-play key for the retrieved encrypted multimedia file to the wireless terminal through the user terminal.

Meanwhile, a second aspect of the present invention provides a method for providing a multimedia file to a wireless terminal by a user terminal, the method comprising: (a) receiving a multimedia file selection criterion; and (b) a multimedia file including the multimedia file selection criterion. Transmitting a request message to a multimedia file providing server, and (c) receiving an encrypted multimedia file matching the multimedia file selection criteria and a pre-play key for the encrypted multimedia file from the multimedia file providing server. And (d) transmitting the received encrypted multimedia file and the pre-play key to the wireless terminal.

According to a third aspect of the present invention, there is provided a method for purchasing a multimedia file using a wireless terminal, the method comprising: (a) receiving a multimedia file selection criterion; and (b) an encrypted multimedia matching the multimedia file selection criterion. Receiving a pre-play key for a file and the encrypted multimedia file, (c) transmitting a license key purchase message for the encrypted multimedia file to a multimedia file providing server, and (d) the license key Receiving a license key corresponding to a purchase message from the multimedia file providing server, and (e) decrypting and playing the encrypted multimedia file using the license key provides a multimedia file purchase method.

Meanwhile, a fourth aspect of the present invention provides a method of presenting a multimedia file using a wireless terminal, the method comprising the steps of: (a) receiving an encrypted multimedia file and a pre-play key for the encrypted multimedia file; b) transmitting a license key purchase message for the encrypted multimedia file and identification information of the wireless terminal to be given to the multimedia file providing server, and (c) the license corresponding to the license key purchase message to the wireless terminal to receive the gift. Receiving a key from the multimedia file providing server, and (d) decrypting and playing the encrypted multimedia file using the license key by the wireless terminal to receive the gift.

Meanwhile, a fifth aspect of the present invention provides a method of purchasing a multimedia file using a wireless terminal, the method comprising: (a) receiving an encrypted multimedia file and a pre-play key for the encrypted multimedia file; A purchase reservation for the encrypted multimedia file; and (c) a user terminal receives information on the purchase-reserved multimedia file from the wireless terminal, and purchases a license key for the purchase-received multimedia file. Transmitting the license key corresponding to the license key purchase message from the multimedia file providing server to the wireless terminal; and (e) the license. Decrypt the encrypted multimedia file using a Purchase offers multimedia files comprising the step of regeneration.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. . In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.

In the present specification, "multi-media file" includes not only "sound source" but also "video", "game", "image", "text", etc., and "video" includes "MPEG2", "MPEG4", and "H.264". “FLASH” files, including all content with movement in frames, including file formats or codecs such as ”,“ WMV ”,“ ASF ”,“ AVI ”,“ DIVX ”, and“ XVID ”.

As used herein, the term "sound source" includes a music file such as MP3, OGG, WAV, WMA, AAC, and the like, and a ringtone file such as Synthetic Music Mobile Application Format (SMAF), Standard Midi File (SMF), MP3 ring, and the like.

In the present specification, "playing in advance" means "preview" when the multimedia file is "sound source", and "viewing" a part of the video when "video", and "game". In this case, a part of the game is executed. In the case of "text", the part of the text is "Preview", and in the case of "Image", the part of the "Image" is "Preview".

In the present specification, the "license key" includes a pre-listening key that can decode and play the pre-listening section of each sound source, and a full-length listening key that can decode and play the entire section of each sound source. In addition, the "license key" preferably includes a master key capable of playing any sound source for a predetermined period and a ringtone key capable of converting each sound source into a ringtone.

In the present specification, for convenience of description, the "license key" will be described based on a detachable license key that is physically separated from the content, but is not necessarily limited thereto, and includes a combined license key that is physically combined with the content.

In the present specification, the "wireless terminal" is a portable terminal capable of wireless communication with a sound source providing server and reproducing a sound source, for example, a mobile phone with an MP3 player, an MP3 player capable of wireless communication, a PDA, and digital multimedia. Broadcasting terminal, navigation terminal, game machine, URC (Ubiquitous Robotic Companion) and various embedded devices (embedded device) and the like.

In the present specification, the “user terminal” is a terminal capable of downloading a sound source by accessing an internet network operated at a flat rate. Include.

In the present specification, "user terminal" and "wireless terminal" will be distinguished from each other, but as the technology is developed, this distinction is not only obscure, but is gradually integrated, so that those skilled in the art can easily understand that the two are not necessarily distinguished. will be.

Hereinafter, for convenience of description, the present invention will be described only in the case where the "multimedia file" is a "sound source", but the present invention is not intended only for the "sound source". Those skilled in the art will readily understand that the present invention can be extended to various kinds of "multimedia files".

1 is a schematic block diagram of a sound source providing system according to an embodiment of the present invention.

The sound source providing system according to an embodiment of the present invention includes a sound source providing server 100, a user terminal 200, a wireless terminal 300, and a network 400.

The sound source providing server 100 encrypts the sound source provided by the copyright holder by using the DRM technology, and stores the sound source together with a license key for decrypting it. The same license key may be generated for each sound source, but may also be generated corresponding to the device identifier or the user identifier of the wireless terminal 300 that requests the purchase of the sound source.

The sound source providing server 100 receives a sound source request message from the user terminal 200 such as a personal computer (PC) through the network 400. The sound source request message includes sound source selection criteria according to the user's taste, and the selection criteria include “genre of music”, “age”, “time”, “artist”, “theme music”, “public album”, Includes "broadcast charts", "data capacities", etc.

The sound source providing server 100 searches for sound sources matching the sound source selection criteria, and transmits the searched sound sources and respective preview keys for the corresponding sound sources to the user terminal 200 in a batch. As already explained, the transmitted sound sources are encrypted sound sources.

As an alternative to the above method, the sound source providing server 100 may automatically analyze the sound sources that the user has purchased and search for and transmit the sound sources according to the music tendency of the user based on the analysis result.

In addition, when the sound source providing server 100 receives a license key purchase request message from a wireless terminal 300 such as a mobile phone in which an MP3 player is built in, the sound source providing server 100 checks whether the corresponding license key is paid or not. After confirming the device identifier and the like, transmit the corresponding license key.

The license key purchase request message may include a sound source identifier corresponding to a sound source to be purchased and a device identifier or a user identifier of the wireless terminal 300 that transmitted the purchase request.

In addition, the sound source providing server 100 is preferably encrypted so that the license key transmitted to the wireless terminal 300 can be used only in the wireless terminal 300. For example, a method of encrypting a license key using a public key of a public key infrastructure and transmitting the encrypted key to the corresponding wireless terminal 300 may be used. In addition, it is also possible to encrypt the combination of one or more of the specific information of the wireless terminal 300. Specific information of the wireless terminal 300 includes a serial number, a CPU number, a MAC address, a telephone number, an ESN number, and the like.

On the other hand, the user terminal 200 provides a screen for inputting the selection criteria of the sound source to the user, and stores the selection criteria input through the screen.

In addition, the user terminal 200 transmits a sound source request message including a sound source selection criterion to the sound source providing server 100 through the network 400, and corresponds to each of the sound sources matching the sound source selection criteria and the corresponding sound sources. Download the preview key.

As described above, it is preferable that the user terminal 200 transmits a sound source request message to the sound source providing server 100 and receives the searched sound sources and respective pre-listening keys through an internet network that is operated at a flat rate.

In this way, by connecting to the Internet network operated at a flat rate and downloading the encrypted sound source, it is possible to avoid paying a separate wireless communication fee.

In addition, the user terminal 200 receives a sound source download request from the wireless terminal 300, the sound source provided from the sound source providing server 100 and each pre-listening key for the corresponding sound source to the wireless terminal 300 send.

The method of transmitting a sound source and a pre-listening key from the user terminal 200 to the wireless terminal 300 may include a connection through a USB interface, a connection through an RS-232C cable, Bluetooth, and IrDA (Infrared Data Association) technology. The connection, the connection using a wired / wireless modem, the indirect connection using an external memory, and the like may be used. External memory includes USB memory, T-flash memory, MMC memory, memory sticks, SD cards, external HDDs, and the like.

Up to now, the user terminal 200 has previously downloaded the sound sources corresponding to the sound source selection criteria and the pre-listening keys of the corresponding sound sources from the sound source providing server 100, and thereafter a sound source download request from the wireless terminal 300 In this case, only the method of transmitting the data back to the wireless terminal 300 has been described. However, the wireless terminal 300 may be connected to the user terminal 200 to download a sound source and a pre-listening key directly from the sound source providing server 100. Do.

In other words, when the user connects the wireless terminal 300 to the user terminal 200, the user terminal 200 automatically detects this and executes the automatic download agent, and the automatic download agent provides the sound source providing server 100 Receiving the sound source and the pre-listening key of the corresponding sound source from the), it is also possible to transmit to the wireless terminal 300. The user terminal 200 detects that the wireless terminal 300 is connected by using a device identifier or a user identifier of the wireless terminal 300.

The user searches for the downloaded sound sources using the wireless terminal 300, listens in advance using the pre-listen key, and transmits a purchase request message for the sound source to be purchased to the sound source providing server 100, and the sound source. The license server for the corresponding sound source is received from the providing server 100. As described above, the purchase request message preferably includes a sound source identifier for a sound source to be purchased and a device identifier or user identifier of the wireless terminal 300.

The wireless terminal 300 decrypts and reproduces the encrypted sound source using the received license key. If the received license key is encrypted, an additional process of decrypting it is necessary. For example, if a license key is encrypted using a public key, it must be decrypted using a private key.

As described above, a wireless communication fee or a data call fee may be charged for the process of requesting and receiving a license key from the wireless terminal 300 to the sound source providing server 100, but the data amount of the license key compared to the data amount of the sound source. Is so small that it is possible to purchase a desired sound source at a low wireless communication cost.

As an alternative to the above method, after making a reservation for a sound source to be purchased in the wireless terminal 300, the direct connection with the user terminal 200 later or indirectly through an external memory, etc. to purchase a license key It is also possible.

For example, when the wireless terminal 300 is directly or indirectly connected to the user terminal 200, the user terminal 200 automatically detects this and executes the automatic download agent, and the automatic download agent is reserved for purchase. The purchase request message for the sound source is transmitted to the sound source providing server 100, the license key for the sound source is received from the sound source providing server 100, and transmitted to the wireless terminal 300. This method has the advantage that a separate data call fee is not charged.

The network 400 includes a dedicated line, a LAN, a QAN, a VAN, an intranet, a private telephone network, a public telephone network, a PSTN network, and a combination thereof, so that each network component shown in FIG. 1 can communicate with each other smoothly. It is a comprehensive data communication network, and includes wired internet, wireless internet and mobile wireless communication network.

Hereinafter, with reference to Figure 2, the detailed function of the sound source providing server 100 according to an embodiment of the present invention will be described. 2 is a detailed block diagram of the sound source providing server 100 according to an embodiment of the present invention.

Sound source providing server 100 according to an embodiment of the present invention DRM unit 110, sound source request receiving unit 120, automatic matching unit 130, sound source transmission unit 140, license request receiving unit 150, license The key transmitter 160, the sound source database unit 170, and the license key database unit 180 are included.

The DRM unit 110 encrypts the sound source provided by the copyright holder using DRM technology, stores the encrypted sound source in the sound source database unit 170, generates a license key for decrypting the sound source, and generates a license key database unit. Save at 180.

Each sound source is preferably divided into blocks and encrypted, and the license key includes a pre-listen key and a full-length song key for each sound source. In addition, the license key preferably includes a master key capable of playing any sound source for a predetermined period and a ringtone key capable of converting each sound source into a ringtone.

In addition, the pre-listening key according to an embodiment of the present invention is preferably a key capable of decrypting one or more of the "highlight", "first half", and "second half" of the encrypted sound source.

The sound source request receiving unit 120 receives a sound source request message from the user terminal 200 through the network 400. As described above, the sound source request message includes user sound source selection criteria, and the selection criteria include “genre of music”, “age”, “time”, “artist”, “theme music”, and “public album”. ”,“ Broadcast chart ”, etc., including category preferences and data volume information.

The automatic matching unit 130 searches for sound sources matching the genre, age, time, data capacity, etc. of the sound sources included in the selection criteria from the sound source database unit 170, and transmits the searched sound sources to the sound source transmission unit 140. .

As described above, the automatic matching unit 130 may automatically analyze the sound sources that the user has purchased and search for and transmit the sound sources according to the music tendency of the user based on the analysis result.

The sound source transmission unit 140 extracts the searched sound sources and the pre-listening keys for the corresponding sound sources from the sound source database unit 170 and the license key database unit 180, and transmits them to the user terminal 200 in a batch.

In addition, when the license request receiving unit 150 receives the full song listening purchase request message for the individual sound source from the wireless terminal 300, the license request receiving unit 150 checks whether the payment for the sound source is performed. When the payment for the corresponding sound source is confirmed, the license key transmission unit 160 transmits a request message for transmitting the whole song listening key.

In addition, when the license request receiving unit 150 receives a ringtone purchase request message for an individual sound source from the wireless terminal 300, after checking whether the ringtone key is paid, the license key transmitting unit 160 determines the ringtone key. Send a transfer request message.

In addition, when receiving a master key purchase request message for reproducing any sound source for a predetermined period from the wireless terminal 300, after confirming payment of the master key, the master to the license key transmission unit 160 Send the request message for key transfer.

In the above description, the license request receiving unit 150 has been described based on a prepaid fee method for confirming payment of a corresponding license key in advance, but those skilled in the art will readily understand that the present invention can be applied to a postpaid fee method. In order to charge for the purchase of the sound source, the purchase request message preferably includes not only a sound source identifier of the sound source to be purchased, but also a device identifier such as a name (model name) and a serial number or a phone number of the device of the wireless terminal 300. .

When the license key transmission unit 160 receives a transmission request message for the full song listening key, the ringtone key, or the master key, the license key transmitting unit 160 receives the full song listening key, the ringtone key, or the master key for the corresponding sound source from the license key database unit 180. Extract it and transmit it to the wireless terminal 300. As described above, the license key is preferably encrypted so that it can be used only in the corresponding wireless terminal 300.

The whole song listening key or the ringtone key may be the same key for each sound source, or may be generated corresponding to the device identifier or the user identifier of the wireless terminal 300 that requests the purchase of the sound source.

In addition, the master key is preferably generated corresponding to the information on the period purchased by the user and the device identifier or user identifier of the wireless terminal 300 requesting the purchase of the sound source.

Hereinafter, a detailed function of the user terminal 200 according to an embodiment of the present invention will be described with reference to FIG. 3. 3 is a detailed block diagram of a user terminal 200 according to an embodiment of the present invention.

The user terminal 200 according to an exemplary embodiment of the present invention includes a synchronization detector 210, an agent execution unit 220, a sound source requester 230, a sound source receiver 240, a sound source transmitter 250, and selection criteria. Database unit 260 is included.

When the user connects the wireless terminal 300 to the user terminal 200, the synchronization detecting unit 210 automatically detects this and transmits an agent execution message to the agent executing unit 220.

The user terminal 200 and the wireless terminal 300 may be connected via a USB interface, an RS-232C cable, a Bluetooth, an IrDA (Infrared Data Association) technology, a wired / wireless modem. A connection using a network, an indirect connection using an external memory, or the like may be used.

When the agent execution unit 220 receives the agent execution message, the agent execution unit 220 executes the agent for automatic download of the sound source.

4 is a diagram illustrating an exemplary screen of an automatic download agent according to an embodiment of the present invention.

The automatic download agent displays a selection criteria input screen on the display of the user terminal 200 that allows the user to select a sound source according to taste.

As shown in FIG. 4, the selection criteria include category preferences, update music counts, and update periods. The preferences by category are music genres such as “OST”, “Ko”, “POP”, “ROCK”, and ages such as “Teens”, “20s”, “30-40s”, “50s and above” , Broadcast charts such as "Top 100", artists such as "singers", "composers" and "producers", theme music, and public albums. The number of update songs is preferably selected according to the storage capacity of the wireless terminal 300. When the update period is set, it is preferable that the latest songs according to the set period are downloaded.

Preferably, the selection criteria as described above can be updated. For example, the automatic download agent may receive and update option items corresponding to selection criteria from the sound source providing server 100.

When the user inputs all the selection criteria of the sound source and clicks the “OK” button, the automatic download agent not only transmits the input selection criteria to the sound source requesting unit 230 but also stores them in the selection criteria database unit 260. .

The automatic download agent may display the selection criteria input screen each time the wireless terminal 300 is connected to the user terminal 200, or display only once when the wireless terminal 300 is first connected to the user terminal 200. It may be. In other words, when the user checks an option of "automatically synchronizing with the current standard" as shown in FIG. 4, the already stored selection criteria may be extracted from the selection criteria database unit 260 and used.

Until now, the sound source selection criteria have been described as being only input from the user terminal 200, but the method of receiving the sound source selection criteria from the wireless terminal 300 is also possible.

The sound source request unit 230 transmits a sound source request message including sound source selection criteria to the sound source providing server 100.

The sound source receiving unit 240 receives the pre-listening keys for the sound sources and the corresponding sound sources that are automatically matched and transmitted according to the transmitted sound source request message from the sound source providing server 100.

The sound source transmitter 250 transmits the received sound sources and the respective pre-listening keys for the corresponding sound sources to the wireless terminal 300.

Hereinafter, a detailed function of the wireless terminal 300 according to an embodiment of the present invention will be described with reference to FIG. 5. 5 is a detailed block diagram of a wireless terminal 300 according to an embodiment of the present invention.

Wireless terminal 300 according to an embodiment of the present invention is a sound source receiver 310, a sound source search unit 320, a pre-listen playback unit 330, a license key request unit 340, a license key receiver 350, A full song reproducing unit 360, a ringtone converting unit 370, a sound source database unit 380, and a license key database unit 390 are included.

The sound source receiving unit 310 is connected to the user terminal 200 through a USB interface, an RS-232C cable, Bluetooth, IrDA, a wired / wireless modem, etc., for each of the sound sources provided from the sound source providing server 100 and the corresponding sound sources. The pre-listening key is downloaded and stored in the sound source database unit 380 and the license key database unit 390, respectively.

Until now, the wireless terminal 300 has been described only to download the sound source and the preview key from the user terminal 200, the wireless terminal 300 is a method of receiving the sound source and the preview key from another wireless terminal 300 It is also possible. In this case, data may be transmitted between wireless terminals using a communication technology such as IrDA, Bluetooth, or the like through an indirect connection using an external memory.

The sound source search unit 320 provides a user with a screen for searching for sound sources stored in the sound source database unit 380. 6 is a diagram illustrating an example of a sound source search screen according to an embodiment of the present invention. As illustrated in FIG. 6, a user may search for a sound source without restriction of a place while moving through the sound source search unit 320 included in the wireless terminal 300.

The pre-listen playback unit 330 performs a function of pre-listening and reproducing the sound source selected by the sound source search unit. In detail, the sound source selected by the sound source search unit is extracted from the sound source database unit 380, the preview key for the sound source is extracted from the license key database unit 390, and then the corresponding sound source is extracted using the extracted preview key. Play after decoding.

If there is no listening key in advance due to a communication failure or the like, it is possible to request the sound source providing server 100 to download for free.

The license key request unit 340 requests a license key purchase message to the sound source providing server 100 when the user selects a purchase for the whole song listening key, the ringtone key, or the master key. The license key requesting unit 340 may make a payment for the requested license key through the wireless payment means before requesting the license key purchase message to the sound source providing server 100. As an alternative to such a pre-payment method, when the wireless terminal 300 is, for example, a mobile phone, it is preferable to charge a fee for purchasing a license key later along with a call fee.

The license key purchase message not only includes information on the license key to be purchased, but also preferably includes the name (model name) and serial number or telephone number of the device as a device identifier of the wireless terminal 300. In the case of the all-music listening key or the ringtone key, it is preferable to include a sound source identifier of a sound source to be purchased, and in the case of the master key, the sound key may include period information such as sound reproduction.

The license key receiving unit 350 receives the full song listening key, the ringtone key or the master key from the sound source providing server 100 and stores the received key in the license key database unit 390.

The sound source purchase may be made in the form of giving a gift to the wireless terminal 300 owned by another person as well as the wireless terminal 300 owned by the other. In this case, the license key purchase message is transmitted to the sound source providing server 100 together with the identification information of the wireless terminal 300 which the presenting wireless terminal 300 receives. The identification information of the wireless terminal 300 receiving the gift may be, for example, a telephone number. Thereafter, the gift-receiving wireless terminal 300 receives the license key received from the sound source providing server 100.

If the license key is encrypted, it must be decrypted in order to use it. For example, when the license key is encrypted using the public key, the license key is decrypted with the secret key. When the license key is encrypted by combining one or more of the specific information of the wireless terminal 300, the decryption is performed using the specific information used. do.

The pre-song playback unit 360 performs a function of playing the entire section of the sound source is complete purchase listening listening to the song. In detail, the whole song reproducing unit 360 extracts a sound source from which the purchase of all songs is purchased from the sound source database unit 380, extracts the whole song listening key for the corresponding sound source from the license key database unit 390, and then listens to the extracted whole song. Decode and play the sound source using the key.

In addition, when a user purchases a master key capable of playing all the sound sources for a certain period of time, the master key is extracted from the license key database unit 390 and then decrypted and reproduced by using the encrypted sound source. . After a certain period of time that the user has settled, the sound source cannot be decrypted using this master key.

In the decryption rule, the master key takes precedence over the whole song listening key. Therefore, if there is a master key, decryption is performed using the corresponding master key, and if there is no master key or expires, it is searched whether a license key of individual content exists.

The ringtone converting unit 370 performs a function of converting a sound source for which a ringtone purchase is completed into a ringtone. Specifically, the ringtone player 360 extracts a sound source from which the ringtone purchase is completed, from the sound source database unit 380, extracts a ringtone key for the sound source from the license key database unit 390, and then uses the extracted ringtone key. To convert the sound source to a ringtone. The ringtone conversion is preferably converted by an embedded program embedded in the wireless terminal 300.

Until now, only a method of converting a sound source to a ringtone has been described, but after downloading an encrypted ringtone sound source, listening to it in advance, and a method of directly purchasing a ringtone is also possible.

7 is a diagram illustrating an example of a preview screen according to an embodiment of the present invention.

As illustrated in FIG. 7, the user may set a pre-listening section during pre-listening playback for the selected sound source. For example, you can press the “Menu” button at the bottom of the screen and select the section that you want to listen to in advance from “Highlight”, “First Half” and “Last Half”. Since the stored sound source is divided into blocks and encrypted, it is possible to decrypt a desired section of “highlight”, “first half” and “second half” by using a pre-listening key.

In addition, as shown in FIG. 7, the user may purchase a sound source during the pre-listening play for the selected sound source. For example, by pressing the "menu" button at the bottom of the screen and selecting "purchase songs", it is possible to request the sound source providing server 100 to listen to all songs for the song.

In addition, as shown in FIG. 7, the user may purchase a ringtone during the pre-listening play for the selected sound source. For example, by pressing the "menu" button at the bottom of the screen and selecting "purchase ringtones", the ringtone key for the song can be requested to the sound source providing server 100.

Up to now, it has been described that the user sets a pre-listening section, purchases a full song, or purchases a ringtone during the pre-listen play for the selected sound source. However, the present invention is not limited thereto, and the above-described sound source search screen as shown in FIG. It is also possible to perform a function.

According to one embodiment of the present invention as described above, it is possible to search and listen to the sound source in advance in the wireless terminal on the move without paying a separate data call fee, and to purchase and receive the sound source at a low data call rate by transmitting and receiving only a license key through wireless communication. Ringtones are available for purchase.

Hereinafter, a sound source and a license key providing method according to an embodiment of the present invention will be described with reference to FIG. 8. 8 is a signal flowchart illustrating a sound source and a license key providing method according to an embodiment of the present invention.

The sound source providing server 100 encrypts the sound source provided by the copyright holder using the DRM technology, and generates a license key for decrypting the sound source (S10).

The user connects the wireless terminal 300 to the user terminal 200 to update the sound source stored in the wireless terminal 300 (S20).

The user terminal 200 detects that the wireless terminal 300 is connected, and executes the automatic download agent. The automatic download agent displays a selection criteria input screen so that the user can select a sound source according to his or her preference, and the user inputs selection criteria into the corresponding screen (S30). If there are already stored selection criteria, it is preferable to display and display the stored selection criteria.

The user terminal 200 transmits a sound source request message including sound source selection criteria to the sound source providing server 100 (S40).

The sound source providing server 100 searches for sound sources matching the genre, age, time, and data capacity of the sound source included in the received selection criteria (S50), and the searched sound sources and the pre-listen keys for the corresponding sound sources are user terminals. The wireless terminal 300 transmits the data to the wireless terminal 300 through S200 (S60). As described above, the process of transmitting the searched sound sources and the pre-listen keys for the sound sources to the user terminal 200 is preferably through an internet network operating at a flat rate, which is transmitted back to the wireless terminal 300. It is preferable to use a USB interface, an RS-232C cable, Bluetooth, IrDA, a wired / wireless modem, or the like.

The user may search for the sound sources downloaded to the wireless terminal 300, and listen to and play the desired sound in advance (S70). As described above, the preview can be played by selecting a section to be pre-listened among the “highlights”, “first half” and “second half”.

If the user wants to purchase the sound source from the sound source search screen or the preview screen of the wireless terminal 300, the license key purchase message is transmitted to the sound source providing server 100 (S80). The license key purchase message may include a device identifier or a user identifier of the wireless terminal 300.

When the sound source providing server 100 receives a license key purchase message, the sound source providing server 100 transmits a license key to the wireless terminal 300 after confirming payment of the corresponding license key or checking a device identifier or a user identifier (S100). .

As described above, a wireless communication fee may be charged for the process of requesting and receiving a license key from the wireless terminal 300 to the sound source providing server 100, but the amount of data of the license key is very large compared to the amount of data of the sound source. Since it is small, it is possible to purchase a desired sound source at a low wireless communication cost.

The wireless terminal 300 decodes the corresponding sound source with the license key received from the sound source providing server 100 to play and listen to all songs or to convert the ringtone (S110).

Up to now, for convenience of explanation, the present invention has been described only when the "multimedia file" is a "sound source", but the present invention is not limited to the "sound source" as described above. Those skilled in the art will readily understand that the present invention can be extended to various kinds of "multimedia files".

The invention can also be embodied in the form of a recording medium containing instructions executable by a computer, such as a program module executed by the computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, computer readable media may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transmission mechanism, and includes any information delivery media.

The foregoing description of the invention is intended to be illustrative, and those skilled in the art will understand that modifications are readily possible in construction and implementation. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention may be limited only by the appended claims and not by the detailed description.

According to the above-described configuration of the present invention, multimedia files that match the selection criteria entered by the user in advance can be downloaded to the wireless terminal using an internet network operated at a flat rate. You can search and play the multimedia files you want on the go.

In addition, when the user wants to purchase a multimedia file, there is an effect that the multimedia file can be purchased from the wireless terminal without limiting the place without paying excessive data call charges.

Claims (19)

In the multimedia file providing server to provide a multimedia file to the wireless terminal, (a) encrypting and storing the multimedia file; (b) receiving a multimedia file request message including multimedia file selection criteria from a user terminal; (c) retrieving an encrypted multimedia file that matches the multimedia file selection criteria; (d) transmitting the retrieved encrypted multimedia file and a pre-play key for the retrieved encrypted multimedia file to the wireless terminal through the user terminal. Multimedia file providing method comprising a. The method of claim 1, (e) receiving a license key purchase message from the wireless terminal; and (f) transmitting a license key corresponding to the license key purchase message to the wireless terminal; Method for providing a multimedia file further comprising. The method of claim 1, (e) receiving identification information of a wireless terminal and a license key purchase message from the wireless terminal; (f) transmitting a license key corresponding to the license key purchase message to the wireless terminal to receive the gift; Method for providing a multimedia file further comprising. The method of claim 1, (e) receiving a license key purchase message from the user terminal; and (f) transmitting a license key corresponding to the license key purchase message to the user terminal; Method for providing a multimedia file further comprising. The method according to any one of claims 2 to 4, The license key is a multimedia file providing method comprising a key to play all the music to decrypt the entire section of the encrypted individual multimedia file to play. The method according to any one of claims 2 to 4 And the license key includes a master key capable of decrypting and playing all encrypted multimedia files for a predetermined period of time. A method for providing a multimedia file to a wireless terminal by a user terminal, (a) receiving a multimedia file selection criterion; (b) transmitting a multimedia file request message including the multimedia file selection criteria to a multimedia file providing server; (c) receiving an encrypted multimedia file matching the multimedia file selection criterion and a pre-play key for the encrypted multimedia file from the multimedia file providing server; (d) transmitting the received encrypted multimedia file and the pre-play key to the wireless terminal; Multimedia file providing method comprising a. The method of claim 7, wherein The step (a) is performed in the user terminal multimedia file providing method. The method of claim 7, wherein And (a) step is performed in the wireless terminal. The method of claim 7, wherein The multimedia file selection criteria may be updated based on information received from the sound source providing server. The method of claim 9, The step (d) is performed by connecting the user terminal and the wireless terminal using one or more of a USB interface, RS-232C cable, Bluetooth, IrDA, wired / wireless modem, external memory. In the method of purchasing a multimedia file using a wireless terminal, (a) receiving a multimedia file selection criterion; (b) receiving an encrypted multimedia file matching the multimedia file selection criteria and a pre-play key for the encrypted multimedia file from a user terminal; (c) transmitting a license key purchase message for the encrypted multimedia file to a multimedia file providing server; (d) receiving a license key corresponding to the license key purchase message from the multimedia file providing server; (e) decrypting and playing the encrypted multimedia file using the license key Multimedia file purchase method comprising a. The method of claim 12, Step (c) is (c-1) retrieving the received encrypted multimedia file; (c-2) decrypting and encrypting the encrypted multimedia file by using the pre-play key; (c-3) selecting a multimedia file to purchase a license key from among the encrypted multimedia files Multimedia file purchase method comprising a. The method of claim 12, (E) step of decrypting the license key. The method of claim 12, The license key is a multimedia file purchase method comprising a key to play all the music to decrypt the entire section of the encrypted individual multimedia file. The method of claim 12, The license key includes a master key that can decrypt and reproduce all encrypted multimedia files for a certain period of time. In the method of presenting a multimedia file using a wireless terminal, (a) receiving a multimedia file selection criterion; (b) receiving an encrypted multimedia file matching the multimedia file selection criteria and a pre-play key for the encrypted multimedia file from a user terminal; (c) transmitting a license key purchase message for the encrypted multimedia file and identification information of the wireless terminal to be given to the multimedia file providing server; (d) the wireless terminal receiving the gift receiving a license key corresponding to the license key purchase message from the multimedia file providing server; and (e) decrypting and playing the encrypted multimedia file using the license key by the wireless terminal receiving the gift; Multimedia file presenting method comprising a. In the method of purchasing a multimedia file using a wireless terminal, (a) receiving a multimedia file selection criterion; (b) receiving an encrypted multimedia file matching the multimedia file selection criteria and a pre-play key for the encrypted multimedia file from a user terminal; (c) making a purchase reservation for the encrypted multimedia file; (d) receiving, by the user terminal, information about the multimedia file reserved for purchase from the wireless terminal, and transmitting a license key purchase message for the multimedia file reserved for purchase to a multimedia file providing server; (e) receiving, by the user terminal, a license key corresponding to the license key purchase message from the multimedia file providing server and transferring the license key to the wireless terminal; (f) decrypting and playing the encrypted multimedia file using the license key Multimedia file purchase method comprising a. A computer-readable recording medium having recorded thereon a program for performing each step of the method according to any one of claims 7 to 18 on a computer.

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