KR20050088529A - Method of multimedia contents service for mobile - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a multimedia content service method for a portable terminal, which enables various multimedia functions, which are commonly used in a PC, to be applied to a portable terminal.

In accordance with an aspect of the present invention, there is provided a multimedia content service for a mobile terminal, in which a user requests a purchase by connecting a user's mobile terminal to a wireless Internet server, selecting a multimedia content to be downloaded, and inputting purchaser authentication information, and requesting a purchase of multimedia content from the user's mobile terminal. If present, the wireless internet server encrypts the content file by recording the purchaser authentication-related information for each header of the selected content file and the frame of the file, and downloads the content file to the mobile terminal with the specified number. When the playback mode is selected, the buyer's authentication information is read from the header of the corresponding content file, and the validity and validity are checked. Then, the purchaser's authentication information recorded in units of frames is sequentially decoded and decoded sequentially. And a step of reproducing the file.

Description

Method of multimedia content service for mobile terminal {Method of multimedia contents service for mobile}

The present invention relates to a multimedia service for a mobile terminal, and in particular, by prohibiting execution on a mobile terminal other than the designated mobile terminal at the time of downloading the paid multimedia contents to protect the content owner and the owner so as to establish a correct trade order. The present invention relates to a multimedia content service method for a portable terminal.

The proliferation and use of various multimedia contents including VOD (Video on Demand) and AOD (Audio on Demand) provide many educational opportunities, enjoyment and convenience to Internet users.

The proliferation of multimedia use is based on an environment in which a relatively large amount of contents can be easily downloaded and played from a server through a PC connected to the Internet, and there are a few things to note.

First of all, since the use of PC-based multimedia is not equipped with mobility, there is a problem in that its use is limited because it is restricted in the use place. This can be solved by connecting a mobile communication terminal to the wireless Internet, and at the current technology level, a satisfactory wireless Internet data transmission rate cannot be obtained, but in view of the rapid development of recent communication technologies, the practicality of the future is in doubt. There will be no.

Second, if the multimedia content is paid, the copyright holder or the owner of the content may be economically damaged by an illegal or unauthorized user of the content. This means that if the contents are illegally copied and spread randomly, the damages caused by the copyright holder are enormous.

Third, unlike mobile terminals, most PCs are equipped with a CD-ROM writer or DVD writer, which makes it easy to illegally copy and propagate downloaded contents. In particular, MP3 files among multimedia contents are supported by high compression and high sound quality, and the user base is thick, but has a disadvantage of weak protection of music copyright.

Therefore, in order to execute the service of PC-based or mobile terminal-based multimedia contents, in consideration of the above-mentioned matters, the development of a multimedia service plan for restricting the unauthorized use of others in addition to the party right holder who purchased the paid contents has been realistically requested. .

The present invention is to solve the above-mentioned problems of the prior art, the object of the present invention is to apply a variety of multimedia functions that are common in a PC to a portable terminal so that various multimedia contents can be executed in the mobile terminal, but the party to purchase paid content The present invention provides a multimedia content service method for a portable terminal, which enables the holder to selectively execute the corresponding multimedia content.

Another object of the present invention is to eliminate the concerns of unauthorized use and illegal copying of service contents through accurate authentication of party licenseees, thereby enabling mobile terminal multimedia services to activate various multimedia content services. To provide a content service method.

In accordance with one aspect of the present invention, there is provided a method for providing a multimedia content service for a mobile terminal by connecting a user portable terminal to a wireless Internet server, selecting multimedia contents to be downloaded, and inputting purchaser authentication information to request a purchase. If there is a request for purchase of multimedia content from the terminal, the wireless Internet server encrypts the content file by recording the purchaser authentication-related information for each header of the selected content file and the frame of the file, and then downloads the content file to the mobile terminal of the designated number. If the playback mode of the multimedia content file downloaded on the screen is selected, the purchaser authentication related information is read from the header of the corresponding content file, and the validity and validity are checked. Coding to play the corresponding multimedia content file.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a service system of the present invention. As referred to herein, the service system of the present invention is largely composed of a mobile communication terminal 10, a wireless Internet server 30 and a multimedia content DB (40).

The mobile communication terminal 10 uses the user's number (telephone number, etc.) for the multimedia content file purchased from the wireless Internet server 30, for example, an MP3 file, an image file, or a video file. Configure to decode and play internally.

When the wireless Internet server 30 requests a multimedia content download request from the mobile communication terminal 10 connected through the Internet, the wireless Internet server 30 transmits a content list to the mobile communication terminal 10 for each item contained in the multimedia content DB. After selecting the content file, and receiving the user number of the mobile terminal 10 to be downloaded, and then retrieves the selected content file from the multimedia content DB 40, the user number and other authentication related information, for example It is configured to encrypt by applying the usage period and the frequency of use, and then download it to the mobile communication terminal.

The multimedia content DB 40 includes various video files, MP3 files, image files, and various audio files.

The encryption operation for the selected content is configured to be automatically executed in the encoding engine 32 provided inside the wireless Internet server 30.

The multimedia content DB 40 is configured to be connected to a web server to provide a content file selected by the user of the portable terminal to the web server.

2 is a circuit block diagram of a portable terminal according to the present invention. As referred to herein, the CPU 11 performing the communication control function and the multimedia control function of the portable terminal includes the key input unit 15 for selecting various menus and function selection, and operating system programs and download program data of the portable terminal. A / V signal processing unit 16 for processing the memory unit 12, various multimedia signals and communication signals to be stored and outputting them to the display 18 and the speaker 17, and a communication interface unit 14 for data communication with an external PC. ) And an RF signal processor 19 for modulating and demodulating the radio data signal and the RF voice signal.

In addition, the CPU 11 may be connected to the decoding module 13 as a hardware decoding device for decoding the encrypted multimedia content file.

Referring to the operation of the multimedia content service system for a mobile terminal of the present invention configured as described above are as follows.

First, in order to download the multimedia content file for the mobile terminal, the multimedia content download menu for the mobile terminal provided by the wireless Internet server 30 is selected. If the multimedia content download menu is selected, the wireless Internet server 30 is retained by the multimedia content DB 40 and moves to a content list page so that the user can select an arbitrary content from the mobile terminal.

If there is a selection of arbitrary contents from the list of multimedia contents from the mobile terminal and input of a mobile terminal user number for encryption and authentication of the selected contents, the wireless Internet server 30 stores the selected content file in the multimedia contents DB 40. The relevant content file is encrypted by the authentication related information including the user number inputted.

At this time, the user number of the authentication-related information can be obtained during the initial login authentication process for the wireless Internet server 30, in this case, if there is a selection of multimedia content to download from the PC side, the user number is automatically in the authentication-related information Apply.

In addition, in addition to the user number (for example, the mobile terminal number), the period of use information and the number of times of use may be applied to the authentication related information.

In particular, the number of times of use included in the authentication-related information is limited to the number of times of use by subtracting the contents once each time the corresponding content is played on the mobile terminal, and the period of use included in the authentication-related information is based on the real-time value of the mobile terminal. By setting the expiration time by the actual date and time value is checked to limit the period of use.

3 is an encryption file for encrypting (encoding) the corresponding content by using the above authentication related information in the wireless Internet server 30 before downloading the content recorded in the multimedia content DB 40 to the portable communication terminal 10 side. The creation process is shown schematically.

As referred to herein, when there is a purchase request for multimedia content from the user's mobile terminal, the web server records the buyer authentication related information in the header of the selected content file, encrypts the content file, and converts it into KMF. Specifically, the authentication-related encryption information stored in the header of the KMF includes various information, user number information, usage period information, and usage count modification of the corresponding multimedia content.

In particular, in order to minimize the possibility of hacking by strengthening the security of KMF encrypting the content file purchased by the user, the wireless Internet server 30 splits the purchased content file into a large number of frame units and then for each header of each frame. The encrypted buyer authentication related information can be recorded. At this time, the header information of the content file includes each frame information divided into a plurality.

That is, when the mobile terminal requests to purchase a specific multimedia content file such as an MP3 file, the web server converts the content into a KMF by the KMF system and then downloads the content to the mobile terminal.

The KMF content file downloaded to the portable terminal 10 is a file unit according to the licensee authentication related information (user portable terminal number information, etc.) in the decoding module when the portable terminal has a hardware-based decoding module 13. Or decoded in units of frames and stored in the memory unit 12. The multimedia content file stored in the memory unit 12 is processed by the A / V signal processing unit 16 under the execution control of the CPU 11 by the key input unit 15 and output to the display 18 and the speaker 17. .

In addition, the KMF content file transmitted to the mobile terminal 10, if the software-based decoding engine is installed in the form of a plug-in program, the file unit or frame unit based on the licensee authentication information by the decoding plug-in program Is decoded and stored in the memory unit 12. Similarly, the multimedia content file stored in the memory unit 12 is processed by the A / V signal processing unit 16 according to the execution control of the CPU 11 by the key input unit 15 to the display 18 and the speaker 17. Is output.

That is, by operating a hardware-based decoding module or a software-based decoding plug-in program provided in the mobile terminal, the A / V signal processing unit 16 decodes the KMF content file stored in the memory unit in a frame unit or a file unit according to the decoding order thereof. In real-time processing at the display 18 and the speaker 17 can be output. This has the effect of further enhancing the security of the multimedia content service for the mobile terminal.

4 is a flowchart illustrating another embodiment of an execution process of a service of the present invention.

Here, the PC-based multimedia content mobile terminal download process is described. In order to download and execute multimedia contents such as MP3 files with the mobile terminal, the multimedia content service provided by the multimedia web server is provided by the user of the mobile communication terminal. After accessing the home page, the user's PC purchases and selects desired contents such as MP3 from the list of multimedia contents provided by the multimedia web server, and finally the mobile terminal information (for example, terminal number or password number) to be downloaded. Enter as.

If there is a selection of content and input of authentication information from the PC side, the web server encrypts the user authentication information by adding content information, file information, usage period information, usage count information, etc. KMF is generated by writing to the header of each frame constituting the file. The KMF thus created is automatically downloaded to the user's PC. The execution process for this is shown in a flowchart in FIG.

When the download of KMF content to the PC is completed, download it to the mobile terminal via the PC link cable.

Subsequently, if there is a request for decoding the KMF downloaded from the mobile terminal and executing the corresponding content, the authentication information recorded in the header of the KMF is read, compared with the mobile terminal number, and the validity of the KMF is verified. After the license is authenticated, the original multimedia content file is restored and reproduced.

6 is a flowchart illustrating the decoding process of the KMF contents. First, the licensee number, the usage period, the number of times of use, and each frame information included in the file header of the KMF to be decoded and reproduced are read.

Next, it is determined whether or not a party licensee is obtained by comparing the licensee number extracted by decoding the header (or each frame header constituting the file) information of the content file. In this case, if the user is authenticated as a party licensee, the usage period information and the number of usage restriction information included in the authentication information contained in the header (or each frame header) of each file are checked to determine the validity of the file.

If the result of the usage right inquiry of the above KMF contents in the mobile terminal is valid contents, the playback is executed. Otherwise, an error is processed to prohibit unauthorized use of the file.

As described above, the multimedia content service for a mobile terminal of the present invention is a service business of various multimedia contents targeted to a mobile terminal by eliminating concerns about unauthorized use and illegal copying of service contents through accurate authentication of a party licensee. Brings a distinctive effect that makes it possible.

1 is a block diagram of a service system of the present invention.

2 is a circuit block diagram of a portable terminal according to the present invention.

3 is a conceptual diagram of creating KMF (content encryption) executed in the web server of the present invention.

4 is a flowchart illustrating execution of the present invention service.

5 is a flowchart of the encoding process during execution of the present invention service.

6 is a flowchart of a decoding process during execution of a service of the present invention.

* Description of the symbols for the main parts of the drawings

10: portable terminal 11: CPU

12 memory unit 13 decoding module

14: communication interface unit 15: key input unit

16: A / V signal processor 17: speaker

18: display 19: RF signal processing unit

30: Wireless Internet Server

31: encoding engine 32: decoding engine

40: multimedia content DB 50: PC link cable

Claims (1)

Accessing the user's mobile terminal to the wireless Internet server, selecting the multimedia content to be downloaded and inputting the buyer's authentication information, and requesting the purchase; and when the user requests the purchase of the multimedia content from the user's mobile terminal, the wireless Internet server checks the selected content file. Encrypting the content file by recording the purchaser authentication-related information for each header of the header and the frame, and downloading the content file to the mobile terminal with the specified number; and if the play mode of the multimedia content file downloaded to the mobile terminal is selected, the header of the content file And checking the legitimacy and validity by reading the purchaser authentication related information, and then sequentially decoding the buyer authentication related information recorded in units of frames and playing the multimedia content file. How to multimedia content services for mobile devices.