KR20020079112A - System and method of on-line distribution of compressed moving pictures - Google Patents

Abstract

PURPOSE: A method and a system for distributing a compressed moving image through the on-line are provided to transmit the high quality moving image after compressing into a volume of one CD and to make the compressed data be read by only a justified user by using a digital writer manager. CONSTITUTION: A server of a businessman providing a movie compresses one movie into the digital moving image content in order to put into one CD(S100). A user connects to the server, and downloads and stores the compressed digital content in the user's computer(S110). When the downloaded digital content is executed, the EC(Electric Commerce) for paying a movie viewing charge is carried out(S120). The server gives a DRM(Digital Right Manager) key permitting the use level according to the paid charge to the user(S130). The user uses the compressed digital content according to the permitted level by using a coded DRM key(S140).

Description

SYSTEM AND METHOD OF ON-LINE DISTRIBUTION OF COMPRESSED MOVING PICTURES}

The present invention relates to a method and system for distributing online compressed video, in particular, a method for distributing high-definition video on the Internet into a single CD data and transmitting the data to a legitimate user using a digital light manager. And a system.

Currently, the Internet broadcasting (real-time) video streaming method is used. However, a user who accesses the Internet to watch a movie sometimes has a problem of blowing up all already paid movie tickets when the communication is disconnected.

In addition, when a plurality of users access a particular movie at the same time, there is a problem that the relay server operating the Internet movie theater is overloaded. As a result, instead of providing a service for streaming one video movie in real time, it is possible to omit the method of distributing the movie by downloading one video content of each movie, but usually one to six GB of one 150 minute movie is provided. Since the size has a capacity, it is not easy to distribute the digital content containing the movie to download.

Accordingly, a first object of the present invention is to compress and process a movie and video digital content into a 400 to 700MB size corresponding to a digital CD (CD), so that the user can download it on the Internet. And to provide a system.

In addition to the first object, the second object of the present invention is to control a user who has a right to use a 150-minute movie on the Internet for a fee, and view or distribute it in a single CD. The present invention provides an online compressed video distribution method (DRM) and a system for preventing theft.

1 is a flow chart showing an online video digital content distribution model according to the present invention.

2 is a diagram illustrating a software module included in a video providing server for distributing according to an online video digital content distribution model according to the present invention.

3 is a diagram showing the configuration of a video data compression apparatus according to the present invention;

<Explanation of symbols for the main parts of the drawings>

200: analog video

210: first encoding means

220: I frame detector

230: second encoding means

300: video compression module

301: electronic payment module

302: DRM Key Management Module

In order to achieve the above object, the present invention provides a method for distributing one movie to a user for a fee on the Internet. (A) A server of an operator providing the movie may include the one movie in a single CD quantity. Compressing the video into digital content so that the video content can be compressed; (b) a user accessing the server, downloading the compressed digital contents, and storing the compressed digital contents on a hard disk of a computer; (c) performing the electronic payment for paying the movie viewing fee when the compressed digital content downloaded and stored in the user's computer is executed; (d) the server granting the user a digital light manager (DRM) key that allows the user to use a corresponding selected level according to the fee paid by the user in the electronic payment step; And (e) using the compressed digital content according to the granted level by using the encrypted digital light manager key granted to the user.

Hereinafter, an online video digital content distribution technology according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a flow chart illustrating an online video digital content distribution model according to the present invention. Referring to FIG. 1, first, a video providing server that provides a movie on the Internet needs a process of compressing data such that one movie can be contained in a single CD (ie, 650 to 700 MB) (step S100).

In general, a 150-minute movie is compressed according to the prior art, and the size of digital content is 1 to 6 GB. Therefore, a technology of recompressing the film to about 10: 1 and storing it on a single video CD is provided. need. The business model constituted by the present invention is characterized in that it comprises a step (step S100) of compressing the film so as to have a size of 400 to 700 MB or less. It is described in detail in the application specification filed (Application No. 10-2001-0014198).

Subsequently, the video providing server providing a movie on the Internet posts the compressed video digital content according to the present invention on the homepage, and downloads the compressed video digital content when the Internet access user wants to watch or use a specific movie. do.

Here, the use of the video content by the Internet user implies the meaning including one-time viewing, repeated viewing or duplication of a video CD, transfer to another person, and the like. As a preferred embodiment of the present invention, when one 150-minute movie is compressed down to a size of 400 to 700 MB, it can be downloaded over a predetermined time depending on the transmission speed of the communication line. As a result, although the download time may be somewhat longer depending on the speed of the transmission communication channel, the problem of disconnection during movie watching, which has been experienced in the prior art, does not occur at all.

Subsequently, when the download process of the moving picture digital content to the user's computer is completed, the user executes the content and the electronic payment module of the moving picture providing server executes (step S120). That is, the contracted fee is paid online according to a usage level desired by the Internet access user (single viewing, viewing multiple times, allowing repeated viewing for a certain period of time, infinite viewing, etc.) (step S120).

According to a preferred embodiment of the present invention, various forms of electronic money payment method can be used. Subsequently, the video providing server transmits and stores a digital right manager key (DRM) key to the user's computer corresponding to the selected use level (step S130). Then, the Internet-connected user can enjoy the license granted by the DRM key stored in his computer, and can view, copy, transfer, and the like.

As an embodiment of the present invention, one-time viewing of a movie, 1,000 won, three-day use rights of 3,000 won, CD replication grant 10,000 won can be given a different DRM key. As an embodiment of the online digital content distribution model according to the present invention, when a user wants to copy a video CD, the CDR program may be operated and stored in the CD after inquiring the DRM key.

As such, the video contents stored in the video CD can be transferred as a gift to others, but unauthorized copying is blocked because the DRM key is specified. The online video content distribution technology according to the present invention can operate well in Windows Media Player version 7.0, and the DRM key can be configured in the format proposed by Microsoft as a 128-bit encryption key.

2 is a diagram illustrating a software module included in a video providing server for distributing according to an online video digital content distribution model according to the present invention. Referring to FIG. 2, the video compression module 300 according to the present invention compresses video and audio using an MPEG2 algorithm to store one movie on a single CD, that is, a storage medium having a size of 650 to 700 megabytes (MB). Then, the MPEG2 file is recompressed by separating the I frames from the B and P frames and removing the remaining I frames, leaving only the first and last I frames.

The electronic payment module 301 according to the present invention charges a fee according to the use level selected by the internet accessor when the internet accessor selects and requests the video content generated by the video compression module 300. In addition, the DRM key management module 302 according to the present invention manages the use of content by Internet users, and generates and assigns a DRM key to block unauthorized use.

3 is a diagram showing the configuration of a video data compression apparatus according to the present invention. Referring to FIG. 3, there is shown a first encoding means 210 for compressing video and audio with an MPEG2 algorithm in order to improve the clarity of the raw source file of the analog video 200.

That is, as a preferred embodiment of the present invention, the analog video signal 200 contained in the original video tape can be encoded into an image having a size of 512 x 384 pixels using an MPEG encoder, and a single file can be generated by synthesizing the image and audio. Can be. At this time, for example, if a 150-minute video movie is encoded by the MPEG encoding means 210, it has a size of about 5 to 6 GB (gigabytes), and in the prior art, it is stored through DVD-R. Will be.

On the other hand, the present invention forms a AVI or MPG file of 10 to 15 times the compression rate by using a flask tool in order to reduce the file size of 5 to 6GB by 10: 1. Referring back to FIG. 1, the I frame detector 220 detects an I frame with respect to a stream of I frames, B frames, and P frames constituting a primary compressed file generated by the first encoding means 210. do.

In addition, the second encoding unit 230 separates the B frame and the P frame coded between the I frame detected by the I frame detection unit 220 and the subsequent I frame from the I frame, and the first of the plurality of I frames. Only I and last I frames are compressed and coded together with the B and P frames. As a result, 150 minutes of a 512 x 384 sized movie is downloaded by the Internet user and stored in a single video CD (VCD) 240.

In addition, the bitstream generating unit 250 may perform the VOD Internet video stream transmission 260 on the compressed file generated by the second encoding unit 230. As a result, Internet users can download high-definition video streams and store them on a single video CD.

The foregoing has outlined rather broadly the features and technical advantages of the present invention to better understand the claims of the invention which will be described later. Additional features and advantages that make up the claims of the present invention will be described below. It should be appreciated by those skilled in the art that the conception and specific embodiments of the invention disclosed may be readily used as a basis for designing or modifying other structures for carrying out similar purposes to the invention.

In addition, the inventive concepts and embodiments disclosed herein may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art may be variously changed, substituted, and changed without departing from the spirit or scope of the invention described in the claims.

As described above, the present invention makes it possible for an Internet-connected user to download and store a movie on a single CD.

In addition, the present invention has the effect of preventing unauthorized copy distribution of video digital content using the DRM key.

Claims (8)

In the method of distributing one movie to the user for a fee on the Internet, (a) the server of the provider providing the movie, compressing the one or more movies into moving picture digital content so as to include one CD; (b) a user accessing the server, downloading the compressed digital contents, and storing the compressed digital contents on a hard disk of a computer; (c) performing the electronic payment for paying the movie viewing fee when the compressed digital content downloaded and stored in the user's computer is executed; (d) the server granting the user a digital light manager (DRM) key that allows the user to use a corresponding selected level according to the fee paid by the user in the electronic payment step; And (e) the user using the compressed digital content in accordance with the granted level using the encrypted digital light manager key granted to the user; Online compressed video content distribution method comprising a. The method of claim 1, wherein step (e) comprises: if the usage level allows for unlimited use, The server transmitting a CD-R program online to the user's computer and installing the CD-R program on the user's computer; And The CD program storing the moving image digital content on a single CD when the user is confirmed that the user can use the unlimited number of times by referring to the digital light manager key stored in the user computer. Online compressed video content distribution method comprising a. 2. The method of claim 1, wherein the step (a) compresses the video and audio of the analog video file constituting the movie using a high-definition MPEG2 algorithm, and separates the I frame from the B and P frames, Recompressing the MPEG2 file to a 10: 1 size by recompressing the last I frame with the remaining B and P frames. 2. The on-line compression of claim 1, wherein step (d) comprises granting a user a 128 bit DRM key and playing the movie using a Windows media player according to the usage level granted by the DRM key. How to distribute video content. In the video providing server system for transmitting the video digital content corresponding to the movie downstream to the computer of the Internet user online to provide the Internet user to use the video digital content, the video providing server is Compresses video and audio using MPEG2 algorithm to store one movie on CD (CD), 650 to 700 megabytes (MB), and then separates I frame from B and P frames. A video compression module for recompressing the MPEG2 file by removing only the first I frame and the last I frame and removing the remaining I frames; If the Internet user downloads the digital video content generated by the video compression module to a size of 600 to 700 megabytes or less and stores it on his / her computer, and starts to execute, the Internet user selects a usage level. An electronic payment module for collecting charges according to a level of use; And When the Internet user pays the electronic money to the electronic payment module according to the desired usage level, the Internet user transmits and stores a digital light manager (DRM) key corresponding to the usage level to the computer of the internet user. DRM Management Module Online video providing server comprising a. The method of claim 5, wherein the Internet user inquires the DRM key stored in the computer when the downloaded video content is executed, and when the DRM key allows the copying of the video CD, a CDR program operates to the video CD. Online video providing server, characterized in that the stored. The method of claim 5, wherein the video compression module First encoding means for generating a VOB file in MPEG format composed of audio or video data from analog video; A detector for detecting I frame data constituting a moving image block with respect to the primary compressed file generated by the first encoding means; The B frame and the P frame coded between the I frame and the subsequent I frame detected by the detection unit are separated from the I frame, and only the first I frame and the last I frame of the plurality of I frames together with the B frame and the P frame. Second coding means for compressing and encoding the code Online video providing server comprising a. The method of claim 5, wherein the video compression module First encoding means for generating a VOB file of MPEG format composed of audio or video data from the analog moving picture; A detector for detecting I frame data constituting a moving image block with respect to the primary compressed file generated by the first encoding means; The B frame and the P frame coded between the I frame and the subsequent I frame detected by the detection unit are separated from the I frame, and only the first I frame and the last I frame of the plurality of I frames together with the B frame and the P frame. Second encoding means for compressing and encoding the code; Bitstream generating means for generating and transmitting a video compressed file generated by the second encoding means as an Internet VOD stream file. Online video providing server comprising a.