KR20120054898A - Method for home service of digital cinema contents using peer to peer communication, and apparatus for the same - Google Patents

Abstract

PURPOSE: A home service method of digital cinema content using peer to peer communication and a device thereof are provided to show 2K/4K images and 3D content to a user at home. CONSTITUTION: A first communication module(310) transmits signals for authenticating a user and searching digital cinema content to an in-cinema device. A second communication module(320) receives the searched digital cinema content and a group KDM(Key Delivery Message) form the in-cinema device. A KDM management module(340) manages the group KDM. An SPB module(360) decodes the digital cinema content. A reproduction unit(370) outputs the decoded digital cinema content to a user.

Description

Method and home service for digital cinema contents using peer to peer communication, and apparatus for the same}

The present invention relates to a technology for servicing digital cinema content to which DRM (Digital Right Management) is applied to the home. More specifically, the present invention relates to digital cinema content and group keys using peer-to-peer communication (P2P) in a theater. The present invention relates to an in-house service method of digital cinema content for distributing and watching a movie at home in a group, and an apparatus therefor.

Films filmed and screened on film are becoming digital. Scanning and digitizing film, or digitally filmed with a digital camera from the beginning, facilitates editing and distribution of the film.

However, unlike film films, digitalized movies have no deterioration in image quality when copying, and there is a need for copyright protection because copying is easy and there is a fear of illegal copying and distribution. Accordingly, the Digital Cinema Initiative (DCI) establishes digital cinema standards and encrypts digital cinema content so that it can be distributed in the form of DCP (Digital Cinema Package) to prevent illegal distribution of digital cinema content. Distribute the KDM (Key Delivery Message) containing the key to decrypt the movie so that it can be played.

Since KDM is issued for each device to play digital cinema, it cannot be played outside of the device. Even if a user has a DCP file, the KDM cannot play the movie and thus prevent illegal distribution of the digital cinema.

However, since the movie is screened in the limited space of the theater, there are many limitations in terms of time and space. In the past, it was difficult to keep up with the quality of the theater in terms of device resolution and image quality, so it was found that the theater was limited by time and space. However, as the device specification increases, digital cinema content has become sufficiently visible in the home. Not only 2K and 4K video, but also 3D content can be fully screened on home devices.

Accordingly, there is a need for a method and apparatus for distributing and displaying digital cinema content not only in a theater, but also to general individuals located in homes and offices.

An object of the present invention to solve the above problems is to provide a device that can serve digital cinema content in-house using Peer-to-Peer (P2P) communication.

Another object of the present invention for solving the above problems is to provide a method for in-house service of digital cinema content using peer-to-peer communication.

According to an aspect of the present invention, there is provided a device for in-house service of digital cinema content using peer-to-peer communication, the group designating a right to reproduce digital cinema content and the digital cinema content for each group of users. Peer-to-peer communication comprising an in-house device for transmitting a KDM (Key Delivery Message) and an in-house playback device for reproducing the digital cinema content using KDM and the digital cinema content transmitted from the in-house device An apparatus for in-house service of digital cinema content is provided.

Here, the indoor playback device is a first communication module for transmitting a signal to the device in the theater for authentication of the user and the digital cinema content to be played with the group to which the user belongs, the first communication from the device in the theater A second communication module using a peer-to-peer communication scheme and a digital cinema content storing the digital cinema content received from the second communication module to receive the digital cinema content to be reproduced and retrieved through the module and the group KDM. A partial storage device, a KDM management module for managing the group KDM received from the second communication module, the KDM for the group received from the KDM management module and stored therein, and receiving a request from the KDM management module for the stored group A KDM secure storage device, the image from the digital cinema content portion storage device And a display device and a sound device for receiving, decoding, and outputting the digital cinema content, and a playback unit for receiving the decoded digital cinema content from the SPB module and outputting the decoded digital cinema content to a user.

Herein, the in-theater device is a user connected to the user authentication and the group to which the user belongs. A first communication module for interfacing signaling for searching for digital cinema content to be reproduced with the in-house device, and digital cinema content and issued group KDM at the user's request to peer to peer A second communication module for transmitting in a manner, a component for authenticating whether the user connected through the first communication module is a normal user, by comparing the information input by the connected user with the contents previously input to the user management database It performs the role of authenticating whether the user is a normal user. Group to the user (group to which the user belongs), which has been authenticated through the user authentication module, the user management database that stores the ID and password of the connected user, and related authentication information. KDM generation module for creating and issuing KDMs for a group, group KDM A billing processing module configured to process charging associated with content provision to a corresponding user upon transmission of a group KDM and digital cinema content issued by a last name module, and a target of user authentication and reproduction inputted through the first communication module A group search and interface module for searching for a group to which the user belongs based on the digital cinema content to be searched, and searching for the digital cinema content to be reproduced in a content management database and providing the information to the user through a first communication module; It may be configured to include a group management database for managing information on a group that can receive specific digital cinema content, a user information belonging to each group, and a content management database for managing digital cinema content existing in a device in a theater. have.

According to an aspect of the present invention, there is provided a method for in-house service of digital cinema content using peer-to-peer communication, wherein the user has the right to play digital cinema content and the digital cinema content on a device in a theater. Peer-to-peer communication configured to transmit a KDM (Key Delivery Message) for a group designated by a group, and to play the digital cinema content using the KDM and the digital cinema content transmitted from the in-house apparatus in an in-house playback apparatus. It provides a method for in-house service of digital cinema content using the present invention.

When using the in-house service method and apparatus for digital cinema content according to the present invention as described above, it is possible to enjoy digital cinema content in a non-theater environment such as a home or an office outside of a limited space of a theater.

That is, when using the in-house service method and apparatus according to the present invention, not only 2K and 4K video but also 3D content can provide an environment that can be screened on devices in a sufficient home.

1 is a conceptual view illustrating a concept of an in-house service method and apparatus for digital cinema content according to the present invention.
2 is a block diagram illustrating the configuration of an in-house apparatus for digital cinema content in-house service according to the present invention.
3 is a block diagram illustrating a configuration of an indoor playback apparatus for a digital cinema content in-house service according to the present invention.
4 is a conceptual diagram illustrating a part of a configuration of a conventional KDM tag defined in the KDM related S430-1-2006 document in the SMPTE standard document.
5 is a conceptual diagram illustrating a component of a modified KDM tag for in-house service of digital cinema content according to the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

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

1 is a conceptual view illustrating a concept of an in-house service method and apparatus for digital cinema content according to the present invention.

Referring to FIG. 1, a content provider (CP) 110 processes content and provides the content to the theater 120. At this time, the content is applied with DRM and is operated according to the existing digital cinema operating system. That is, the KDM may be requested to the content provider (or the KDM server) to display the digital cinema content to which the DRM is applied, and the content may be displayed according to the usage rights (period setting) shown in the KDM.

Users 130-1 to 130-5 who have difficulty in accessing the theater can access the theater 120 at home, select desired content, and join the content group. If you join the selected content group, you will be charged at the theater as soon as you subscribe, and you will be able to enjoy the content in your home by receiving the selected content from the users in the group, and receiving the group KDM from the theater if the group subscription is closed. The method of distributing KDM in a group follows an optimized group key distribution method.

In order to be able to issue a KDM for a group in a theater, it is necessary to obtain an authority from a content provider. If the theater pays a separate fee for the service in the group, the content provider can give down a modifiable KDM in the theater. This KDM is in a different format than the KDM required by DCI. In general, digital cinema KDMs that are delivered to theaters are issued as screening devices in theaters, and a tag is required to expand and distribute KDMs to users in a group.

In other words, for home service of digital cinema within a group in a theater, it should be issued to the theater as a KDM with a tag that can be registered as a group user rather than a specific device.

Hereinafter, the configuration of the in-house device and the dedicated playback device for the home, which are necessary for implementing the digital cinema content in-house service according to the present invention, will be described in order. It will also be described in detail.

In-house device for digital cinema content in-house service using P2P

2 is a block diagram illustrating the configuration of an in-house apparatus for digital cinema content in-house service according to the present invention.

Referring to FIG. 2, the apparatus 200 according to the present invention includes a first communication module 210, a second communication module 220, a user authentication module 230, a user management database 240, and a billing processing module. 250, a group search and interface module 260, a group management database 270, a content management database 275, and a group KDM generation module 280 may be configured.

The first communication module 210 is a user connected to the user authentication and the group to which the user belongs. 3 is a component for interfacing signaling for searching for digital cinema content to be reproduced with the indoor device 300, which will be described later with reference to FIG. 3, and the second communication module 220 requests digital cinema content at the user's request. And peer-to-peer communication module for transmitting the issued group KDM to the user's home playback device.

The first communication module 210 and the second communication module 220 are respectively connected to the first communication module 310 and the second communication module 320 of the indoor reproducing apparatus 300 according to the present invention, which will be described later with reference to FIG. 3. Corresponding component to communicate.

Typically, compared to the first communication module 210, the second communication module 220 adopts a communication service requiring a large amount of data transmission at a relatively high speed compared to the first communication module, but the first communication module and the first communication module 2 The communication module may be composed of one component. That is, the first communication module 210 and the second communication module 220 are only functional divisions, and are not necessarily required to be separate components by physical device configuration.

The user management database 240 is a component that stores the ID and password of the user connected to the in-house device 200 and related authentication information. The user management database 240 may include various types of databases (relational database or file base). . The user authentication module 230 is a component for authenticating whether a user connected through the first communication module 210 is a normal user, and the information inputted by the connected user to the user management database 240 is previously input. And to authenticate whether the user is a normal user.

The group search and interface module 260 searches for a group to which a user belongs based on digital cinema content that is a target of user authentication and playback inputted through the first communication module 210, and the content management database 275 to be described later. ) Is a component that searches for digital cinema content to be reproduced and provides the information to the user through the first communication module 210.

The content management database 275 is a database for managing digital cinema content existing in a device in a theater. The content management database 275 includes various related information such as a title, a show time, a show period, and a provider of the corresponding content of the digital cinema content. Element.

The group management database 270 is a database for managing information on groups capable of receiving specific digital cinema content and user information belonging to each group. That is, in order to be provided with specific digital cinema content, a group KDM for the corresponding digital cinema content should be issued together with the digital cinema content. The group management database 270 is a component for managing information on the group to which the user is subscribed. to be.

Joining a group is possible only for a certain period of time before the digital cinema is screened, and may be configured to close from the beginning of transmitting the digital cinema. That is, only the users who have subscribed to the group for a certain period of time create a group KDM and deliver it to the users in the group. At this time, when the movie screening is finished, the group KDM may be configured as a one-time KDM that is discarded so that it can no longer be used.

When a user joins a group, the group KDM generation module 280 generates and issues a KDM for a group to a user (group to which the user belongs) through the user authentication module 230. Through 220, the KDM for the group is sent together with the digital cinema content.

Finally, the billing processing module 250 is a component configured to handle charging associated with providing content to a corresponding user upon transmission of the group KDM and digital cinema content issued by the group KDM generation module 280.

Indoor playback device for digital cinema content in-house service using P2P

The user who has been issued the digital cinema content and the KDM can play the content through a dedicated player provided by the theater, and the indoor playback device described in FIG. 3 serves as the dedicated player.

3 is a block diagram illustrating a configuration of an indoor playback apparatus for a digital cinema content in-house service according to the present invention.

Referring to FIG. 3, the indoor playback apparatus 300 according to the present invention may include a first communication module 310, a second communication module 320, a digital cinema content portion storage device 330, a KDM management module 340, It may be configured to include a secure storage device 350, SPB module 360 and the playback unit 370.

The first communication module 310 is connected to the first communication module 210 of the in-house apparatus 200 described above with reference to FIG. 2 to provide user authentication and signaling for searching for digital cinema content to be played back with a group to which the user belongs. The second communication module 320 is a component for interfacing, and the second communication module 320 is a peer for receiving digital cinema content and issued group KDM from the second communication module 220 of the in-house apparatus 200 described above with reference to FIG. 2. to peer communication module.

The digital cinema content received from the second communication module 320 is partially stored in the digital cinema content partial storage device 330 and reproduced by the SPB module 360 and the playback unit 370, and the group KDM is managed by KDM. The module 340 may be configured to be stored and managed in the secure storage 350.

The SPB 360 module is a component that is delivered to the playback unit 370 to decode and play the received digital cinema content, and the playback unit 370 is configured to include a display device, a sound device, and the like. A stream of decoded digital cinema content delivered from the SPB module 360 is provided to a user through a display device and a sound device.

On the other hand, the indoor playback device 300 inserts a forensic mark employed in digital cinema to prevent illegal distribution of content. Illegal distribution of content by screen capture by creating a fingerprint with user ID or user-recognized data in the KDM sent to the group, inserting it into video and audio of digital cinema content, and displaying it on the screen Can be blocked secondarily.

Modification of KDM tag according to the present invention

Referring to the description of the conceptual diagram illustrated in FIG. 1, for in-house service of digital cinema content according to the present invention, a KDM tag configured only on screen in a theater is modified into a group KDM tag including user group information for in-house service. need.

4 and 5 are reference conceptual views for exemplarily describing a component of a conventional KDM tag and a component of a modified KDM tag to be modified for in-house service of digital cinema content according to the present invention.

First, FIG. 4 is a conceptual diagram illustrating a configuration part of a conventional KDM tag defined in S430-1-2006 document related to KDM among SMPTE (Society of Motion Picture and Television Engineers) standard documents.

Referring to FIG. 4, a tag for new group authentication should be attached to a portion of the KDM tag shown by a dotted line.

Meanwhile, FIG. 5 is a conceptual diagram illustrating a component of a modified KDM tag for in-house service of digital cinema content according to the present invention. In order to issue a KDM in a group in a theater, the group authentication is referred to as “AuthorizedDeviceInfo”. You need to add a tag for it (“AuthorizedGroupInfo”).

For example, the “AuthorizedGroupInfo 510” tag may include a “GroupIdentifier 511” tag for identifying a group and a “UserList 512” tag that contains a list of users belonging to the group.

However, the modification of the KDM tag illustrated in FIG. 5 is only an example of showing various modifications as an example, and it is obvious that the actual implementation may be made of a tag having a different name and configuration.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

200: in-theater device
210: first communication module 220: second communication module
230: user authentication module 240: user management database
250: billing processing module 260: group search and interface module
270: Group Management Database
275: Content Management Database
280: KDM generation module for groups
300: home playback device
310: first communication module 320: second communication module
330: Digital cinema content partial storage device
340: KDM management module 350: secure storage device
360: SPB module 370: playback unit

Claims (1)

An apparatus for in-house service of digital cinema content using peer-to-peer communication, the apparatus comprising: transmitting a group key delivery message (KDM) for designating a digital cinema content and a right to play the digital cinema content for each group of users; And an in-house playback device that plays back the digital cinema content using the digital cinema content and KDM transmitted from the in-house device and the in-house device,
The indoor playback device
A first communication module for transmitting a signal for searching for a user authentication and a digital cinema content to be played back with a group to which the user belongs to the device in the theater;
A second communication module using a peer-to-peer communication scheme for receiving digital cinema content and the KDM for a group, which are to be played back, searched through the first communication module from the in-theater device;
A digital cinema content portion storage device for storing the digital cinema content received from the second communication module;
A KDM management module for managing the group KDM received from the second communication module;
Receiving and storing the group KDM from the KDM management module, receiving the request from the KDM management module, and storing the group KDM secure storage device;
An SPB module for receiving, decoding, and outputting the digital cinema content from the digital cinema content partial storage device; And
And a playback unit for receiving the decoded digital cinema content from the SPB module and outputting the decoded digital cinema content to a user.

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