KR20200121019A - Grid digital cinema content distribution system - Google Patents

Abstract

The present invention relates to a system for distributing digital cinema content in a grid type. According to the present invention, the system comprises: a plurality of theater servers installed in a plurality of theaters distributed in each area; a content supply source transmitting different digital cinema packages (DCP), which are components of a complete DCP file, to the plurality of theater servers; and a content distribution management server storing and managing DCP file division and transmission history information, which is information for DCP division files transmitted from the content supply source to the plurality of theater servers, in a distribution management database. The theater server among the plurality of theater servers refers to the DCP file division and transmission history information provided from the content distribution management server to interchange the DCP division files with other theater terminals in a grid type to acquire one complete DCP file. Accordingly, the content supply source transmits different DCP division files, which are components of one complete DCP file, to the plurality of theater servers once and the theater server among the plurality of theater servers interchanges the DCP division files with other theater terminals in the grid type to acquire one complete DCP file, thereby reducing the costs for distributing the digital cinema content and increasing security in a distribution process.

Description

GRID digital cinema content distribution system {GRID DIGITAL CINEMA CONTENT DISTRIBUTION SYSTEM}

The present invention relates to a GRID type digital cinema content distribution system. More specifically, in the present invention, a content supply source transmits different DCP split files, which are components of one complete Digital Cinema Package (DCP) file, to a plurality of movie theater servers once, and an arbitrary movie theater constituting a plurality of movie theater servers. The server obtains a complete DCP file by exchanging DCP split files in a GRID method with other movie theater servers, thereby reducing the cost of digital cinema content distribution and improving the security in the distribution process. It's about the system.

Movies that were filmed and screened in the past are now being screened through digitized files.

Since the film is scanned and digitized, or taken digitally using a digital camera from the time of production, editing and distribution of the film has become easy.

However, unlike film films, digitized movies do not have any deterioration in quality when copying, and because they are easy to copy, there is a fear of illegal copying and distribution.

Accordingly, the DCI (Digital Cinema Initiative) encrypts digital cinema contents to prevent illegal distribution of digital cinema contents according to the digital cinema standard, distributes them in the form of a DCP (Digital Cinema Package), and distributes encrypted digital cinema contents to be played in theaters. A KDM (Key Delivery Message) containing a decryptable key was also distributed so that the movie could be played.

However, since KDM is issued to each device that plays digital cinema content, digital cinema content cannot be decoded except for the corresponding device, and thus digital cinema content cannot be played. Therefore, even if you have a DCP file, you cannot play a movie and watch it, so you can prevent illegal distribution of digital cinema.

Meanwhile, the file size of one digital cinema movie currently corresponds to 150GB, and in order to screen the movie, the DCP (Digital Cinema Package) 150GB files are copied to external hard disks and distributed to movie theaters nationwide, so the burden of distribution costs is considerable. And, there are various problems such as the loss of the movie industry, where security is the most important part.

In order to solve this problem, a distribution method through the Internet as disclosed in FIG. 1 was introduced, but according to this, since the transmission sections between the content supply source and all movie theater servers are all billing traffic sections, movie theater servers installed in movie theaters distributed in various places In the process of distributing digital cinema content, there is a problem in that billing traffic is greatly increased and transmission time is lengthened.

Republic of Korea Patent Publication No. 10-2007-0089426 (published date: August 31, 2007, title: digital cinema screening management system and screening management method using the same) Republic of Korea Patent Publication No. 10-2012-0054898 (published date: May 31, 2012, name: method and apparatus for in-house service of digital cinema content using peer-to-peer communication) Republic of Korea Patent Publication No. 10-2011-0071407 (Publication date: June 29, 2011, title: DRM-applied digital cinema content sharing method and system between devices in theaters)

The technical problem of the present invention is an arbitrary movie theater server in which a content supply source transmits different DCP split files, which are components of one complete Digital Cinema Package (DCP) file to a plurality of movie theater servers once, and constitutes a plurality of movie theater servers. Is a GRID-type digital cinema content distribution system that can reduce the cost of digital cinema content distribution and improve security during distribution by exchanging DCP split files in a GRID method with other movie theater servers to obtain a complete DCP file. Is to provide.

The GRID type digital cinema content distribution system according to the present invention for solving these technical problems includes a plurality of movie theater servers provided in a plurality of movie theaters distributed by region, and one complete DCP (Digital Cinema Package) Stores DCP file split transmission history information, which is information on a content supplier that transmits different DCP split files, which are components of a file, and DCP split files that the content supplier transmits to the plurality of movie theater servers, in the distribution management DB. Any movie theater server comprising a content distribution management server that is managed by the user, and constituting the plurality of movie theater servers, is provided in a GRID manner with other movie theater servers by referring to the DCP file division and transmission history information provided by the content distribution management server. The DCP file is obtained by exchanging DCP split files.

In the GRID type digital cinema content distribution system according to the present invention, the DCP file split transmission history information includes IP addresses of movie theater servers that have received DCP split files constituting the DCP file from the content supplier. It is characterized.

In the GRID type digital cinema content distribution system according to the present invention, when an event of receiving one of the DCP split files from the content supplier occurs, the arbitrary movie theater server constituting the plurality of movie theater servers The DCP split file received by requesting the DCP file split transmission history information from the content distribution management server, and transmitted from the content provider to other movie theater servers corresponding to the IP addresses included in the DCP file split transmission history information The DCP file is generated by requesting the remaining DCP split files while transmitting, and combining the DCP split files transmitted from the other movie theater servers with the DCP split files received from the content provider.

The GRID type digital cinema content distribution system according to the present invention further includes a plurality of theater servers connected to each movie theater server constituting the plurality of movie theater servers through a virtual private network (VPN) and subordinate, Each movie theater server constituting a plurality of movie theater servers transmits the DCP file obtained by the GRID method to one or more of the plurality of theater servers, and the theater server reproduces the DCP file and provides it to the audience. do.

In the GRID type digital cinema content distribution system according to the present invention, each movie theater server constituting the plurality of movie theater servers transmits a KDM (Key Delivery Message) transmitted from the content supplier or the content distribution management server to the theater server. And decryption of the DCP file by using the encryption key extracted from the KDM.

According to the present invention, a content supply source transmits different DCP split files that are components of one complete Digital Cinema Package (DCP) file to a plurality of movie theater servers once, and an arbitrary movie theater server constituting a plurality of movie theater servers By exchanging DCP split files with other movie theater servers in a GRID method to obtain complete DCP files, it is possible to reduce the cost of digital cinema content distribution and improve security during distribution.

1 is a diagram showing a conventional digital cinema content distribution system,
2 is a diagram showing a digital cinema content distribution system of a GRID method according to an embodiment of the present invention,
3 is a diagram for illustratively explaining the operation of a GRID digital cinema content distribution system according to an embodiment of the present invention,
4 and 5 are diagrams specifically and intuitively illustrating a networking structure of a content supply source and a plurality of movie theater servers constituting a GRID type digital cinema content distribution system according to an embodiment of the present invention.
6 is a view showing a comparison of billing traffic between the conventional technology and the digital cinema content distribution system of the GRID method according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating a comparison of transmission times between a conventional technology and a GRID type digital cinema content distribution system according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in the present specification are only exemplified for the purpose of describing the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention are in various forms. And are not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, embodiments are illustrated in the drawings and will be described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various elements, but the elements should not be limited by the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the concept of the present invention, the first component may be named as the second component and similarly the second component. The component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it should be understood that it is directly connected or may be connected to the other component, but other components may exist in the middle. will be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Other expressions describing the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to" should be interpreted as well.

Terms used in the present specification are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described herein, but one or more other features. It is to be understood that the possibility of addition or presence of elements or numbers, steps, actions, components, parts, or combinations thereof is not preliminarily excluded.

Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present specification. .

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

2 is a diagram illustrating a digital cinema content distribution system of a GRID method according to an embodiment of the present invention.

Referring to FIG. 2, a GRID-type digital cinema content distribution system according to an embodiment of the present invention includes a movie theater server 10, a content supplier 20, a content distribution management server 30, a distribution management DB 40, and It includes a theater server 50.

A plurality of movie theater servers 10 are provided in a plurality of movie theaters distributed by region, and an arbitrary movie theater server constituting the plurality of movie theater servers 10 is provided with one complete DCP from a content supply source 20 to be described later. (Digital Cinema Package) Receiving different DCP split files, which are components of a file, and referring to the DCP file split transmission history information provided by the content distribution management server 30, the DCP split files with other movie theater servers in a GRID method. It performs the function of acquiring one complete DCP file through interchange.

The content supply source 20 is a component that transmits different DCP split files, which are components of one complete Digital Cinema Package (DCP) file, to the plurality of movie theater servers 10.

The content distribution management server 30 is a component that stores and manages the DCP file division and transmission history information transmitted from the content supply source 20 to the plurality of movie theater servers 10 in the distribution management DB 40.

For example, the DCP file split transmission history information stored in the distribution management DB 40 may include IP addresses of movie theater servers that have received DCP split files constituting the DCP file from the content supplier 20.

An exemplary configuration in which the plurality of movie theater servers 10 obtain one complete Digital Cinema Package (DCP) file in the GRID method will be described as follows.

That is, an arbitrary movie theater server constituting a plurality of movie theater servers 10 includes: 1) when an event of receiving one of the DCP split files from the content supply source 20 occurs, 2) the content distribution management server 30 DCP file split transmission history information is requested and provided, and 3) DCP split file transmitted from the content provider 20 is transmitted to other movie theater servers corresponding to the IP addresses included in the DCP file split transmission history information. While requesting the remaining DCP split files, and 4) combining the DCP split files transmitted from other movie theater servers with the DCP split files received from the content provider 20 to create one complete DCP file. have.

The theater server 50 is connected to and subordinated to each of the movie theater servers constituting the plurality of movie theater servers 10 through a virtual private network (VPN). That is, movie theaters distributed in each region are equipped with a plurality of screening theaters. In addition, movie theaters distributed in each region are equipped with a movie theater server in charge of a corresponding movie theater, and a plurality of theater servers 50 are connected to and subordinate to a virtual private network (VPN). In addition, each theater server 50 is in charge of a corresponding theater.

For example, each movie theater server constituting the plurality of movie theater servers 10 transmits the DCP file obtained by the GRID method to one or more of the plurality of theater servers 50, and the theater server 50 transmits the received KDM It decrypts the encryption using (Key Delivery Message) so that the audience can watch the movie at the theater in charge.

For example, each movie theater server constituting a plurality of movie theater servers 10 transmits a key delivery message (KDM) received from the content supply source 20 or the content distribution management server 30 to the theater server 50, and , The theater server 50 may be configured to screen after decrypting the DCP file using the encryption key extracted from the KDM.

Hereinafter, the operation of the GRID type digital cinema content distribution system according to an embodiment of the present invention will be exemplarily described with additional reference to FIG. 3.

3 shows that there are 100 movie theater servers distributed by region, but this is only an example, and the number of movie theater servers may be less than 100 or more than 100. In addition, it should be noted that the movie theater server may be distributed within a single country or distributed across multiple countries.

3, in step S110 to step S130, the content supply source 20 transmits different DCP split files, which are components of one complete Digital Cinema Package (DCP) file, to a plurality of movie theater servers 10. The process of doing is carried out. In steps S110 to S130, it is exemplified that the size of one complete DCP (Digital Cinema Package) file is 150 GB, and the size of the DCP split file transmitted to each movie theater server is 1.5 GB, but this is only an example.

In step S140, a process of transmitting the DCP file division transmission history information to the content distribution management server 30 by the content supply source 20 is performed. The DCP file split transmission history information is information on the DCP split files transmitted by the content supply source 20 to the plurality of movie theater servers 10, and the DCP file split transmission history information constitutes a DCP file from the content supplier 20 Includes the IP addresses of the movie theater servers that received the DCP split files.

In step S150, the content distribution management server 30 stores and manages the DCP file division and transmission history information transmitted from the content supply source 20 in the distribution management DB 40.

In step S160, a process of requesting DCP file split transmission history information from the plurality of movie theater servers 10 to the content distribution management server 30 is performed. Although described above, the plurality of movie theater servers 10 received different DCP split files from the content supply source 20 through steps S110 to S130. When such a DCP split file reception event occurs, the plurality of movie theater servers 10 determine that the content supplier 20 has distributed a new DCP file, and immediately, the DCP file split transmission history information to the content distribution management server 30 Is to request.

In step S170, the content distribution management server 30 transmits the DCP file split transmission history information transmitted from the content supply source 20 and stored in the distribution management DB 40 to the plurality of movie theater servers 10. . Although described above, the DCP file split transmission history information includes IP addresses of movie theater servers that have received DCP split files constituting the DCP file from the content supply source 20.

The process of steps S180 to S200 is a process in which a plurality of movie theater servers 10 exchange DCP split files with each other in a GRID method using IP addresses included in the DCP file split transmission history information to generate one complete DCP file. to be.

In the process of steps S180 to S200, the movie theater server 1, which has received the DCP split file #1 from the content supply source 20, is the remaining divided files in a GRID communication method with the remaining movie theater servers, that is, the movie theater server 2 to the movie theater server 100. In other words, it represents the process of receiving DCP split file #2 to DCP split file #100 and combining the collected split files, that is, DCP split file #1 to DCP split file #100, to create one complete DCP file. . That is, the processes of steps S180 to S200 are based on the movie theater server 1, but it is noted that the same process can be applied to the remaining servers, that is, the movie theater server 2 to the movie theater server 100.

In the GRID method DCP file transfer process described above, the networking structure of the content supply source 20 and the plurality of movie theater servers 10 constituting the GRID type digital cinema content distribution system according to an embodiment of the present invention is detailed and intuitive. It becomes clearer with additional reference to FIGS. 4 and 5 illustrated as.

In particular, referring to FIG. 5, in an embodiment of the present invention, only the transmission section of the content supply source 20 and the movie theater server indicated by the red dotted line is the charging traffic section, and the GRID transmission section between the movie theater servers thereafter is This is a section of uncharged traffic. This is different from the contents disclosed in FIG. 1 which is a prior art.

That is, according to the prior art disclosed in FIG. 1, since the transmission sections between the content supply source 20 and all movie theater servers are all billing traffic sections, digital cinema content is distributed to movie theater servers installed in movie theaters distributed in various places. In the process, there is a problem that billing traffic is greatly increased and transmission time is lengthened.

In other words, according to an embodiment of the present invention, since the charging traffic downloaded from the content supply source 20 is applied only to one digital cinema movie file, and the GRID transmission section between the movie theater servers thereafter is not charged, FIG. 1 Compared with the prior art disclosed in FIG. 1, the exemplary embodiment of the present invention has the advantage that the more movie files and the more movie theater servers are, the more cost is proportionally saved and the transmission time is reduced.

6 is a view showing a comparison of billing traffic between the conventional technology and the digital cinema content distribution system of the GRID method according to an embodiment of the present invention.

Assuming that there are 136 theaters operated by a specific movie theater operator, 40 movies are opened per month, and the capacity per movie is 150 GB, 816 TB traffic is generated when transmitted to all theaters as in the prior art, and Amazon S3 is billed 130 million won. In the case of an embodiment of the invention, 18TB traffic is generated, which results in a charge of 6.5 million won. By reflecting storage management and movie theater Internet usage fees, you can save about 15 times more cost when calculated.

In addition, based on the cost of distributing existing movie files by courier service, 80,000 won per episode and 432 billion won per month are required, whereas according to an embodiment of the present invention, there is a cost saving effect of about 34 times.

FIG. 7 is a diagram illustrating a comparison of transmission times between a conventional technology and a GRID type digital cinema content distribution system according to an embodiment of the present invention.

Referring to FIG. 7 additionally, assuming that 40 files are transmitted at the same time in the case of transmission speed, it takes 2,498 minutes based on Amazon S3 because transmission to all theaters must be sequentially transmitted according to the prior art of FIG. According to an embodiment of the invention, it takes 1,175 minutes for multiple transmission. The time saved is 1,342 minutes, which is equivalent to 22 hours in terms of time.

If the movie file is sent by courier, it takes about 4 days including the external hard copy work to send it to 136 theaters when the entire delivery is completed when it is sent to the whole country, including Jeju Island, but according to an embodiment of the present invention, 1,724 It takes minutes, and in terms of time, it has the effect of reducing about 28 hours.

As described in detail above, according to the present invention, a content supply source transmits different DCP split files, which are components of one complete Digital Cinema Package (DCP) file, to a plurality of movie theater servers once, and configures a plurality of movie theater servers. An arbitrary movie theater server exchanges DCP split files with other movie theater servers in a GRID method to obtain a complete DCP file, thereby reducing the cost of digital cinema content distribution and improving security in the distribution process.

10: cinema server
20: Content Provider (CP)
30: content distribution management server
40: Distribution management DB
50: theater server

Claims (5)

As a GRID type digital cinema content distribution system,
A plurality of movie theater servers provided in a plurality of movie theaters distributed according to regions;
A content supply source for transmitting different DCP split files, which are components of one complete Digital Cinema Package (DCP) file, to the plurality of movie theater servers; And
A content distribution management server storing and managing DCP file division transmission history information, which is information on DCP split files transmitted by the content supplier to the plurality of movie theater servers, in a distribution management DB,
Any movie theater server constituting the plurality of movie theater servers,
A GRID type digital cinema content distribution system for obtaining the DCP file by mutually exchanging DCP divided files in a GRID method with other movie theater servers by referring to the DCP file division transmission history information provided by the content distribution management server.
The method of claim 1,
In the DCP file division transmission history information,
The digital cinema content distribution system of the GRID method, characterized in that the IP addresses of movie theater servers that have received DCP split files constituting the DCP file from the content provider are included.
The method of claim 2,
Any movie theater server constituting the plurality of movie theater servers,
When an event of receiving one of the DCP split files from the content source occurs,
Request and receive the DCP file split transmission history information from the content distribution management server,
Request the remaining DCP split files while transmitting the DCP split file received from the content supplier to other movie theater servers corresponding to the IP addresses included in the DCP file split transmission history information,
A digital cinema content distribution system of a GRID method, characterized in that the DCP file is created by combining the DCP split files transmitted from the other movie theater servers and the DCP split file received from the content provider.
The method of claim 1,
Further comprising a plurality of movie theater servers connected to each movie theater server constituting the plurality of movie theater servers through a virtual private network (VPN) to be subordinated,
Each movie theater server constituting the plurality of movie theater servers transmits the DCP file obtained by the GRID method to one or more of the plurality of theater servers,
The theater server, characterized in that the playback of the DCP file to provide to the audience, GRID type digital cinema content distribution system.
The method of claim 4,
Each movie theater server constituting the plurality of movie theater servers transmits a KDM (Key Delivery Message) transmitted from the content supply source or the content distribution management server to the theater server,
The theater server is a digital cinema content distribution system of the GRID method, characterized in that the decryption of the DCP file using the encryption key extracted from the KDM.

Images