KR20020095001A - Method for transferring a file using the mixing technique of download and streaming - Google Patents

Abstract

PURPOSE: A file transmission method is provided to separate a target file into a download file and a streaming file with reference to a packet order or a data layer, to transmit the download file and the streaming file with the download and the streaming scheme, respectively so that a multimedia file can be transmitted safely and speedily. CONSTITUTION: The method comprises steps of enabling a user to access a file transmission service system(600), checking if the user is a member(602), guiding the user to subscribe for the service system if the user is not a member(604), storing the user data at a user management database(606), displaying a list of files to be serviced(608), receiving the file titles selected by the user(610), requesting the user to pay for the file service before a transmission of the selected files(614), transmitting to the user a message asking if a corresponding download file exists at a user terminal(616), receiving a response message from the user(618), determining if the corresponding download file exists at the user terminal(620), in a case that the corresponding download file exists at the user terminal, transmitting only the streaming file to the user with a streaming scheme(622), and in a case that the corresponding download file does not exist at the user terminal, transmitting the download file to the user terminal and then the streaming file to the user terminal with the streaming scheme(624).

Description

Method for transferring a file using the mixing technique of download and streaming}

The present invention relates to a file transmission method, and in particular, the file to be transmitted is divided into a download file and a streaming file based on packet order or data layer, the download file is transmitted by a download method, and the streaming file is transmitted by a streaming method. The present invention relates to a file transfer method using a combination of download and streaming, which allows a file to be transferred quickly and securely, and to a computer-readable recording medium having recorded thereon a program for realizing the method.

Recently, with the development of computer and multimedia technologies, multimedia information such as video and music is produced in the form of digital data (for example, MP3, etc.), and software and hardware players for reproducing such digital data are actively developed. In addition, such digital multimedia information is rapidly spreading due to the ease of transmission, copying and storage, and the spread of the Internet.

As multimedia spreads due to the development of the Internet, various multimedia application technologies have been introduced. Representative multimedia technologies include video / audio separation from video, multilayer video / audio synthesis, and mixing and real-time encoding of different video, audio and image files. mointek.com) has developed 'cusine studio'.

In the related art, a user downloads a file (digital file) from a server to his computer through the Internet, and then uses the file, which is a problem in that a long download time is required for a large video file or a music file having a good sound quality. there was.

In addition, there is a problem that the possibility of piracy is very high because the download is a copy of the same file as the original.

In order to overcome the above problems, streaming technology has emerged. The concept of streaming refers to the concept that a stream flows little by little, as can be understood from the meaning of stream, such as 'flow' and 'continuous'. Related to

Streaming technology is a technology that divides a file into packets and transmits them one by one. For example, if the time required to read a file that is played for 20 seconds in the download method is 10 seconds, the user must wait 10 seconds when playing after finishing the 10-second reading operation.

However, because the data read for 1 second can be played for 2 seconds, streaming technology plays the data read for 1 second immediately, and then reads and plays the next data before the 2 seconds pass, so the user does not have to wait. There will be no.

The streaming technology is derived from the streaming multimedia technology developed by Real Network Inc., and streaming solutions include RealPlayer RealSystem and Microsoft's Windows Media Technology, and the RealPlayer series is the streaming player.

Streaming technology disappears on the PC screen for a short time, so you don't have to worry about copyright, and the receiver can use multimedia information at a faster rate, which is better for both senders and receivers than download.

However, even in streaming technology, if the packet transmission speed is not constant due to network bottleneck or server overload, there is a problem that the sound is cut off or the video is stopped, and the buffering technique is used to solve this problem. However, due to the miniaturization of the terminal such as the wireless Internet, the application of buffering technology is limited, or when the user moves to a blind spot and the communication is interrupted for a certain period of time, a great effect cannot be expected.

Meanwhile, the production process of the streaming service includes a capture step, an edit step, an encoding step, a transmission step of a server, and a play step, and specific details thereof are as follows.

First, each analog source data stream in video camera, microphone, VTR, etc. is digitized by using capture card and saved on disk (capturing step). Second, it is converted into digital file. Edit by inserting (etc. editing step).

Thirdly, several data streams are integrated and encoded. In this case, compression is performed using MPEG or the like to enable a streaming service (encoding step), and fourth, files and signals compressed by encoding software are transmitted through a server. When transmitted to the server, the server accepts the client's connection and provides the multimedia data requested by the client in real time (transmission step of the server).

Fifth, the client receives the compressed data from the server to play in real time (play step).

In short, a brief comparison between the download method and the streaming method described above is as follows.

The download method has the advantage of being capable of stable playback and recycling of the downloaded data, but has the disadvantage of having to wait a long time since it is possible to play after receiving all the data. On the other hand, the streaming method has the advantage that the time taken to wait until the start of the first playback is small, but there is a disadvantage that the playback quality is largely dependent on the state of the network.

Due to the development of the Internet and the emergence of IMT-2000, the use of files, especially digital files, is increasing at a very rapid rate due to the activation of the wireless Internet. The market is not yet active due to unstable service. As described above, since both the download method and the streaming method are all-in-one, a new method that satisfies both illegal copy prevention, stable playback, and minimization of waiting until playback is required.

The present invention has been made to solve the above problems, the file to be transmitted is divided into a download file and a streaming file on the basis of the packet order or data layer, the download file is transmitted by the download method and streaming file An object of the present invention is to provide a file transfer method using a mixture of download and streaming, and a computer readable recording medium having recorded thereon a program for realizing the above method, which can be transmitted by streaming.

1 is a configuration diagram of an embodiment of a file transfer system using a mixed method of downloading and streaming according to the present invention.

2 is a diagram illustrating a method for separating a file into a streaming file and a download file according to the present invention.

3 is a diagram illustrating a method of playing a file by combining a streaming file and a data file in a user terminal according to the present invention.

4 is a diagram illustrating a method of separating a file according to the present invention into a base layer file and an advanced layer file.

5 is a diagram illustrating a method of playing a file by combining a base layer file and a high layer file in a user terminal according to the present invention;

6 is a flowchart illustrating an embodiment of a file transfer method using a mixing scheme of downloading and streaming in a file transfer system according to the present invention.

7 is a flowchart illustrating a method of playing a received file in a user terminal according to the present invention.

* Explanation of symbols for the main parts of the drawings

100: user terminal 110: the Internet

120: file transfer system 121: user information database

122: control unit 123: payment unit

124: file transfer unit 125: streaming file database

126: Download File Database

In order to achieve the above object, the present invention provides a file transfer method applied to a file transfer system, comprising: a first step of providing a file list to a user terminal connected to receive the file; A second step of selecting a file that the user wants to receive from the user terminal, and transmitting identification information and a download file existence confirmation request message for the selected file to the user terminal; A third step of receiving a response message in response to the download file existence confirmation request from the user terminal to confirm whether the download file exists in the user terminal; A fourth step of transmitting the streaming file for the selected file to the user terminal in a streaming manner if the download file exists as a result of the checking of the third step; And a fifth step of transmitting a download file to the user terminal in a download manner and a streaming file to the user terminal in a streaming manner with respect to the selected file, if the download file does not exist as a result of the checking in the third step. It includes.

On the other hand, the present invention is a file playback method applied to a user terminal having a function of playing a file received from a file transfer system in a mixed manner of download and streaming, the user receives a file list from the file transfer system Providing the first step; Receiving a transmission target file from the user and transferring selection information on the selected file to the file transfer system; Receiving the identification information and the download file existence confirmation request message for the selected file from the file transfer system, and confirms whether the download file for the selected file is stored using the received identification information to the response message to the file Transmitting to a transmission system; And receiving a streaming file of the selected file from the file transmission system in a streaming manner, combining the transmitted streaming file with a download file for the selected file, and reproducing the file to output to the user. It includes 4 steps.

Meanwhile, the present invention provides a file transfer system including a processor for transmitting a file, comprising: a first function of providing a file list to a user terminal connected to receive the file; A second function of selecting a file that the user wants to receive from the user terminal and transmitting identification information and a download file existence confirmation request message for the selected file to the user terminal; A third function of receiving a response message to the download file existence confirmation request from the user terminal to confirm whether the download file exists in the user terminal; A fourth function of transmitting a streaming file for the selected file to the user terminal in a streaming manner when the download file exists as a result of confirming the third function; And a fifth function of transmitting a download file to the user terminal in a download manner and transmitting a streaming file to the user terminal in a streaming manner with respect to the selected file if the download file does not exist as a result of the checking of the third function. A computer readable recording medium having recorded thereon a program for realizing the present invention is provided.

Meanwhile, the present invention provides a first function of receiving a file list from the file transfer system and providing the file to the user terminal having a processor in order to play the file received from the file transfer system in a mixed manner of downloading and streaming. ; A second function of receiving a transfer target file from the user and transferring selection information on the selected file to the file transfer system; Receiving the identification information and the download file existence confirmation request message for the selected file from the file transfer system, and confirms whether the download file for the selected file is stored using the received identification information to the response message to the file A third function of transmitting to the transmission system; And receiving a streaming file of the selected file from the file transmission system in a streaming manner, combining the transmitted streaming file with a download file for the selected file, and reproducing the file to output to the user. 4 Provide a computer-readable recording medium that records a program for realizing the function.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an embodiment of a file transfer system using a mixed method of download and streaming according to the present invention.

The file transfer system (server) 120 includes a user information database 121, a control unit 122, a payment unit 123, a file transfer unit 124, a streaming file database (DB) 125, and a download file database ( DB) 126, which transmits a file according to a request of the user 100, and the functions of each of the components are as follows.

The user information database 121 stores general registration information (eg, personal information, cyber money, authentication information, file usage information, personal information, terminal information, etc.) of the users, and the payment unit 123 stores the credit information of the user. If you pay with a card or mother's money, it will be processed.

The control unit 122 controls the entire system such as the payment unit 122, the file transmission unit 124, in particular, the identification information selected by the user in the user terminal 100, and confirming the existence of the download file for the selected file The request message is transmitted, the response message is analyzed, and the file transfer unit 124 is instructed to transfer the download file / streaming file according to the response result (the existence of the download file).

The file transmission unit 124 may control the streaming file stored in the streaming file DB 125 and / or the download file stored in the download file DB 126 through the network 110 such as the Internet according to a control command of the control unit 122. Transmit to the user terminal 100.

The streaming file DB 125 stores a file (that is, a streaming file) to be transmitted to the user terminal in a streaming manner, and the download file DB 126 stores a file (that is, a download file) to be transmitted to the user terminal in a download manner. do. The streaming file / download file databases 125 and 126 are stored in the form of digital files. Hereinafter, the digital file is simply called a file.

2 is a diagram illustrating a method of dividing a file into a streaming file and a download file according to the present invention.

In a conventional streaming service, a file (for example, a music file, a video file, etc.) is divided into packets, and all the divided packets are sequentially transmitted to the user terminal, so that the contents of the file are reproduced in real time on the screen of the user terminal. do.

In contrast, in the present invention, the file 20 is divided into a plurality of packets, and the divided packets are divided into odd and even packets, and then odd packets 1, 3, 5,... (Packet 11) 24 is stored in the streaming file DB 125 and is transmitted in a streaming manner by the file transmitter 124 according to a user's request, and even-numbered packets (2, 4, 6) are provided. Packet 12) is stored in the download file DB 126 and transmitted according to the user's request by the download method or distributed to users through a peer-to-peer program. Stored in the terminal.

Here, the file includes music and video multimedia files such as AVI, MPEG, MOV, WAV, MP3, VIVO, and the like.

3 is a diagram illustrating a method of playing a file by combining a streaming file and a data file in a user terminal according to the present invention.

The user terminal 100 is downloaded from the file transfer system 120 or downloaded through the P2P program (ie, the download file for the file selected by the user) 300, and streaming from the file transfer system 120 Combining streaming files (i.e., streaming files for the file selected by the user) 302 to be transmitted to the file in real time in the order of packets.

That is, the user terminal 100 outputs packet 1 transmitted from the file transmission unit 124 of the file transmission system 120 in a streaming manner, and packet 2 outputs a packet of a download file that is already stored. Likewise, the user terminal 100 combines the packet of the streaming file and the packet of the download file and the packets are alternately output to the user.

Here, the user terminal 100 is connected to a wired / wireless open network such as the Internet, has a media player function for playing files, and includes a computer with a web browser, a dedicated terminal, a PDA, a mobile phone, and the like. .

If the downloaded file is not played on the user's device or the streaming file or the download file is played alone because of poor connection, the streaming file or download file does not have complete information alone. The sound quality is bad.

Numbers 1 to 12 in the figure indicate the order of packets appearing on the screen 308 of the user terminal, and packet 1 and packet 306 are already output on the screen 308 of the user terminal. The packet No. 3 represents a packet currently output on the screen 308 of the user terminal.

4 is a diagram illustrating a method of dividing a file into a base layer file and a high layer file according to the present invention.

The minimum data (base layer file) 402 which can compose an image by the scalable encoding method without separating the file into a download file and a streaming file based on the packet order (see FIG. 2). By dividing the data (advanced layer file) 404, which increases the quality of information, the base layer file is transmitted by the download method, and the higher layer file is transmitted by the streaming method.

For example, a basic layer file includes songs without accompaniment, low quality music, black and white or light color images, and high level files include colorful accompaniment, medium quality music, and dark color images.

The user terminal 100 combines the base layer file and the high layer file to reproduce the high quality file 400.

5 is a diagram illustrating a method of playing a file by combining a base layer file and a high layer file in a user terminal according to the present invention.

The user terminal 100 combines the basic layer file 500 that is transmitted and stored by the download method and the advanced layer file 502 that is transmitted by the streaming method in the file transmission system 120 to the screen of the user terminal 100. Play and output high quality files.

6 is a flowchart illustrating an embodiment of a file transfer method using a mixing method of download and streaming in the file transfer system according to the present invention.

When the user terminal 100 is connected through a network such as the Internet (600), the file transfer system 120 receives an ID and a password word, which is user identification information, from the user and checks whether the user is a member (602). ).

As a result of the member's inspection, if the member is not a member, the member registration is induced (604) and the user information is input from the user, and the input user information is stored in the user information database 121 (606). Provide a list of files provided by 608.

When the user selects a file that he / she wants to receive, the file transfer system 120 selects a file to be transmitted (610) and requests payment from the user before transmitting the selected file to the user (614). When the payment is completed, the control unit 122 of the file transfer system 120 requests a request message to confirm whether the identification information of the file selected by the user and the download file for the selected file exist (ie, the download file exists). Confirmation request message) is transmitted to the user terminal 100 (616).

Then, the user terminal 100 receives the download file existence confirmation request message, checks whether the download file for the file is stored, and transmits the result to the control unit 122 of the file transfer system 120.

The control unit 122 of the file transfer system 120 receives a response message for the download file existence confirmation request (618), and checks the response message to determine whether a download file for the selected file exists in the user terminal 100. (620).

As a result of the check, if the download file for the selected file exists in the user terminal 100, the control unit 122 transmits the streaming file for the selected file to the file transfer unit 124 in a streaming manner to the user terminal 622. Command Then, the file transmitter 124 transmits the streaming file stored in the streaming file database 125 to the user terminal 100 in a streaming manner according to the control command (622).

As a result of the check, if the download file for the selected file does not exist in the user terminal 100, the controller 122 transmits the download file to the user terminal 100 in a download manner with respect to the selected file, and the streaming file is in a streaming manner. Instructs the file transmitter 124 to transmit to the user terminal 100. Then, according to the control command, the file transfer unit 124 transmits the download file stored in the download file database 126 to the user terminal 100 in a download manner, and is stored in the streaming file database 125. The streaming file is transmitted to the user terminal 100 in a streaming manner (624).

When the user terminal 100 receives only the streaming file from the file transmission system 120, the user terminal 100 combines the downloaded file with the previously stored file and outputs the file to the user in real time.

7 is a flowchart illustrating a method of playing a received file in a user terminal according to the present invention.

The user terminal 100 accesses the file transfer system 120 (700), and when the user login is completed (702), the file transfer system 120 is provided with a file list that is the object of the file transfer service (704). .

The user terminal 100 receives a file from the user and transmits selection information input from the user to the file transfer system 120 (706).

Then, the file transfer system 120 transmits user payment request information to the user terminal 100. The user terminal 100 receives the user payment request information and outputs it to the user, and then inputs the payment information from the user. The file is transmitted to the file transfer system 120 (708).

Subsequently, the user terminal 100 receives the identification information for the file selected by the user and the download file existence confirmation request message for the selected file from the file transfer system 120 (710) and has already downloaded the file using the identification information. The stored data is confirmed whether there exists, and the result of the verification is transmitted to the file transfer system 120 through the response message (712).

Then, the file transfer system 120 transmits the download file according to the content of the response message, or transmits the download file and the streaming file to the user terminal 100.

If the download file is not stored, the user terminal 100 receives and stores the download file from the file transfer system 120 (714), and combines with the stored download file while receiving the streaming file to store the file in real time. Play (716).

On the other hand, in the case where the download file is stored, the streaming file is received and the file is reproduced in real time in combination with the already stored download file (716).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

As described above, the present invention divides a file based on a packet order or a data layer and transmits the file in a part of a streaming method, and a part of the file in a download method, so that users can use a multimedia file using a wired or wireless network. This has the effect of ensuring the speed and stability of the download.

In addition, the present invention can minimize the load of the streaming server by providing only a part of the file by streaming, and also provide a part of the file as a download, even if the illegal copying due to deterioration in the image quality or sound quality, etc. Since the file itself is not available, it is possible to prevent piracy.

Claims (7)

In the file transfer method applied to a file transfer system, Providing a file list to a user terminal connected to receive the file; A second step of selecting a file that the user wants to receive from the user terminal, and transmitting identification information and a download file existence confirmation request message for the selected file to the user terminal; A third step of receiving a response message to the download file existence confirmation request from the user terminal to confirm whether the download file exists in the user terminal; A fourth step of transmitting the streaming file for the selected file to the user terminal in a streaming manner if the download file exists as a result of the checking of the third step; And As a result of the checking in the third step, if the download file does not exist, a fifth step of transmitting a download file to the user terminal in a download manner and a streaming file to the user terminal in a streaming manner with respect to the selected file. File transfer method using a mixed method of downloading and streaming comprising a. The method of claim 1, The download file and the streaming file, The file transmission method using a mixture of download and streaming, characterized in that the file is separated in the packet order. The method of claim 1, The download file and the streaming file, The file is divided according to the data layer, a base layer file is defined as the download file, and a higher layer file is defined as the streaming file. A file playback method applied to a user terminal having a function of playing a file received from a file transfer system by a mixture of download and streaming, A first step of receiving a file list from the file transfer system and providing the file list to a user; Receiving a transmission target file from the user and transferring selection information on the selected file to the file transfer system; Receiving the identification information and the download file existence confirmation request message for the selected file from the file transfer system, and confirms whether the download file for the selected file is stored using the received identification information to the response message to the file Transmitting to a transmission system; And Receiving a streaming file for the selected file from the file transmission system in a streaming manner, combining the transmitted streaming file with a download file for the selected file, and reproducing the file to output to the user; step File playback method comprising a. The method of claim 4, wherein The file playback process of the fourth step, And reproducing the downloaded file and the streaming file in real time in a packet order. In order to transfer a file, to a file transfer system having a processor, A first function of providing a file list to a user terminal connected to receive the file; A second function of selecting a file that the user wants to receive from the user terminal and transmitting identification information and a download file existence confirmation request message for the selected file to the user terminal; A third function of receiving a response message to the download file existence confirmation request from the user terminal to confirm whether the download file exists in the user terminal; A fourth function of transmitting a streaming file for the selected file to the user terminal in a streaming manner when the download file exists as a result of confirming the third function; And A fifth function of transmitting a download file to the user terminal in a download manner and a streaming file to the user terminal in a streaming manner with respect to the selected file if the download file does not exist as a result of the checking of the third function A computer-readable recording medium having recorded thereon a program for realizing this. In order to play the file received from the file transfer system in a mixed manner of download and streaming, to a user terminal having a processor, A first function of receiving a file list from the file transfer system and providing the file list to a user; A second function of receiving a transfer target file from the user and transferring selection information on the selected file to the file transfer system; Receiving the identification information and the download file existence confirmation request message for the selected file from the file transfer system, and confirms whether the download file for the selected file is stored using the received identification information to the response message to the file A third function of transmitting to the transmission system; And A fourth function of receiving the streaming file for the selected file in a streaming manner, combining the transmitted streaming file with a download file for the selected file, and playing the file and outputting the file to the user; A computer-readable recording medium having recorded thereon a program for realizing this.