KR20110071748A - Apparatus and method for processing a digital cinema contents - Google Patents

Abstract

PURPOSE: A cinema contents processing device and method is provided to enable a user to experience the high-definition contents by using the media contents which is converted from the digital cinema contents. CONSTITUTION: A contents analyzer(100) extracts an encryption key, contents data and conversion media information and authority information from the cinema contents. A decoder(101) decodes the contents data based on the cryptographic key. A media generator(102) converts the decoded contents data based on the media information to be converted and generates the distributable media contents. A authority information processor(103) unites the authority information and the distributable media contents and generates the package media contents.

Description

Digital cinema content processing apparatus and method {APPARATUS AND METHOD FOR PROCESSING A DIGITAL CINEMA CONTENTS}

The present invention relates to a technology for reprocessing the digital cinema content screened in a movie theater to be used in a user's terminal. More specifically, the present invention relates to a technology for generating media content that can be used by a user's terminal by converting digital cinema content itself distributed in a movie theater, and generating package media content that can manage rights for use of the media content.

With the development of multimedia technology and wired / wireless communication technology, technology for distributing image contents to users has been developed. In particular, there is a growing trend to research the technology that users directly access and use the content screened in the cinema.

Unlike conventional film distribution, movie theaters are now increasingly distributing and displaying digital cinema content. Digital cinema content refers to content that provides a high-definition digital image service to viewers by processing a film taken by a film or a digital camera in the form of a digital file and distributing it through wired / wireless communication or through a storage medium. The standard specification for digital cinema content uses Digital Cinema Initiatives (DCI).

The digital cinema content used in the DCI standard uses Wavelet, MPEG-HD, or JPED-2000 standards as the 2048 * 1080 or 4096 * 2048 high resolution and encoding standard. Also, as a means for encrypting and distributing it securely, the encryption key standard KDM (Key Delivery Message) for delivering Digital Cinema Package (DCP) and decryption information is also used.

The digital cinema content of the DCI standard is a form suitable for movie theaters. There is a need for a technology for converting digital cinema content back into a form suitable for use in a user's terminal. In the conventional method of using digital cinema content in a user terminal, a technology for processing and distributing original content is mostly. Accordingly, the copyright protection is insufficient because the original content is easily leaked, and it has been pointed out that the picture quality cannot be experienced in a movie theater according to the picture quality of the original content.

In order to cope with the above-mentioned necessity and problems, the present invention has an object to convert the digital cinema content to be supplied to the user's terminal. It also provides technology that combines rights information with media content converted from digital cinema content, so that it can be used only after a movie is screened at a movie theater to provide technology that effectively protects copyrights of movies. have.

In order to achieve the above object, the digital cinema content processing apparatus according to an embodiment of the present invention, the content analysis unit for extracting the encryption key and content data of the received cinema content, media information to be converted, and authority information about the cinema content A decryption unit for decrypting the content data based on the encryption key, a media generation unit for generating the distributable media content by converting the decrypted content data based on the media information to be converted, and the authority information and the media content that can be distributed. And a rights information processor for combining and generating package media contents.

In addition, the digital cinema content processing method according to an embodiment of the present invention, the content analysis unit extracts the encryption key and content data of the cinema content, the media information to be converted, and the authority information about the cinema content, the decryption unit encryption key Decrypting the content data based on the received data; and converting the content data decrypted by the decryption unit to generate media content that can be distributed, and the desired information processor combines the authorization information and the media content that can be distributed. Characterized in that it comprises the step of generating.

According to the apparatus and method for processing digital cinema content according to an embodiment of the present invention, a user uses media content converted from digital cinema content. Therefore, there is an effect that can experience high-definition content close to the digital cinema content used in the movie theater. In addition, by directly converting digital cinema content and distributing packaged media content that combines rights information, it is distributed after the movie is screened at a movie theater, which makes copyright protection easier for movies than when using the original content. There is.

Hereinafter, a digital cinema content processing apparatus according to an embodiment of the present invention will be described with reference to FIG. 1.

1 is a block diagram of a digital cinema content processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a digital cinema content processing apparatus according to an embodiment of the present invention includes a content analyzer 100, a decoder 101, a media generator 102, and a rights information processor 103. .

When the content analyzing unit 100 receives the digital cinema content from an external source, the content analysis unit 100 extracts a plurality of pieces of information from the received digital cinema content. According to an embodiment of the present invention, the plurality of information means information necessary for converting digital cinema content into media content that can be used in a home user terminal. As described above, the digital cinema content is packaged in a DCP format and delivered to the content analyzer 100, and the content analyzer 100 extracts a plurality of pieces of information from a package in the DCP format.

The plurality of pieces of information may include an encryption key for the received cinema content. Digital cinema content, when distributed to movie theaters, includes cryptographic keys to protect copyright protection and content leakage. The encryption key may be included in a plurality of pieces of information. The encryption key means information included in the above-mentioned KDM in DCP type digital cinema content.

Content data may also be included in the plurality of information. The content data is information necessary for reproduction of the cinema content. For example, it may be one or more of the image, sound, and subtitle information of the movie. The content data analyzed by the content analyzer 100 is information in a DCI format as mentioned above. In addition, the content data will be encrypted.

Media information to be converted may also be included in the plurality of information. The media information to be converted means information on media content that can be used in a user terminal. As mentioned above, since the cinema content uses the DCI format, which is a format suitable for a movie theater screen or the like, it is necessary to convert it. Accordingly, the media information to be converted includes information on a format (for example, a format suitable for video or a format suitable for a DVD player) for converting cinema content into media content that can be used by a user terminal, characteristics of the media format, and the like. Included. The media information to be converted will be delivered to a media generator that generates media content that can be used by the user terminal.

The plurality of pieces of information may include authority information about cinema content. The authority information means information necessary for authenticating whether a user who uses media content is a suitable user. In addition, it may include information for enabling the movie to be played on the user terminal only after the movie is shown in the cinema. Making the movie playable on the user terminal after the movie is shown at the cinema may be performed in the step of generating the media content by converting the digital cinema content. This is because the digital cinema content must be processed by the digital cinema content processing apparatus according to an embodiment of the present invention to be used in the user terminal. However, by including the above-mentioned information in the authority information, it will be possible to more effectively protect the rights for digital cinema content.

The content analyzer 100 may further include an inspection function for the cinema content. An example is a function that checks whether cinema content is content that can be distributed to a user terminal and whether the cinema content is a DCP normally packaged. Through this, it will be possible to prevent indiscriminate copying and to effectively protect copyrights.

As described above, the content analyzer 100 extracts a plurality of pieces of information from the DCP for the digital cinema content and transmits the information to the decoder 101, the media generator 102, and the authority information processor 103.

The decryption unit 101 receives the encryption key and the content data of the digital cinema content from the content analysis unit 100. The decryption unit 101 decrypts the encrypted content data based on the encryption key. As mentioned above, the content data may include one or more of image, sound, and subtitle information. The decryption unit 101 decrypts one or more of the image, sound, and subtitle information included in the content data so that the media generation unit 102 can convert the received encryption key.

The media generator 102 receives media information to be converted from the content analyzer 100 and the decrypted content data from the decoder 101. The media generator 102 generates media content that can be used in the user terminal based on the received media information to be converted and the decoded content data.

Therefore, the media generator 102 may store media content information that can be played on the user terminal. In addition, since the cinema content needs to be converted, information for decoding the cinema content may be included. For example, the terminal may include encoding related data including a codec of media content playable in a user terminal and transcoding data including decoded data including a codec of cinema content. Trans-coding data refers to encoding and decoding data necessary for converting content having one format into content having another format.

In addition, the media generating unit 102 includes a function of generating media content by combining video, sound, and subtitle information converted into a media format usable by the user terminal.

The user terminal using the media content may be a home PC, for example. In addition, any device capable of reproducing image, sound, and subtitle data included in media content such as a mobile communication device, a general purpose and special purpose computer, a portable computer, a video player, and a DVD player may be used.

The media generator 102 may further include a function of updating the above-mentioned cinema content or information on the media content. Since the information about the cinema content or the media content may change, the media generation unit 102 updates the media content manually or automatically to provide the media content to the user using the latest media content format.

The rights information manager 103 receives the media content generated by the media generator 102 and receives the rights information on the digital cinema content from the content analyzer 100. The package media content that combines the media content and the authority information is generated.

Additionally, the rights information manager 103 may include a function of encrypting media content based on the rights information. Therefore, the authority information is not simply combined, but a function of decrypting the media content can be provided so that only a person having the authority information can use the media content.

The package media content generated by the rights information manager 103 may be stored in a data server of a movie content provider (for example, a DVD content vendor) and then sold to a user. Or, it may be supplied directly to the user terminal.

The authority information for the media content means information necessary for authenticating whether the user who uses the media content is a suitable user. The authorization information may include, for example, information about an identification key for user authentication, a usage time limit, and a usage space limit.

The identification key information for user authentication may be a decryption key included in a purchase number or user ID information when a user for viewing a movie is purchased through an internet shopping mall or the like. Therefore, only an authenticated user can decrypt and use the package media contents.

The usage time restriction information means information on a time at which the media content can be played back. The use time restriction information may include use start time or use end time. Therefore, the media content can be played back after the start time of use, for example, the time when the cinema content corresponding to the media content is screened at the movie theater. Further, for example, playback can be made only up to one week after the purchase time. Through this, firstly, the cinema content itself is converted into media content, or the content analysis unit 100 generates media content after a predetermined time (for example, after a movie screening period has passed) to prevent illegal copying. And copyright protection can be achieved. Secondly, as described above, by encrypting the media content as usage time restriction information among the authority information, illegal copy protection and copyright protection may be achieved.

The space limitation information may be, for example, a certain domain, an IP, or a physical space. For example, media content may be played only at movie sites. In addition, the media content can be played only for a designated IP address, or the media content can be played only in a certain space, for example, a home where the use of the media content is permitted. By encrypting the media content based on the space limitation information, anti-piracy and copyright protection effects can also be obtained.

The digital cinema content processing apparatus according to an embodiment of the present invention may further include a distribution management server 104. The distribution management server 104 may store cinema contents to be distributed. In addition, the distribution management server 104 may further include the above-mentioned authorization information. In addition, the distribution management server 104 may preliminarily control extraction of a plurality of pieces of information of the content analyzer 100 for the digital cinema content. Through control of the content analyzer 100, preliminary copy protection and copyright protection of digital cinema content may be preliminarily performed.

2 illustrates a processing flow of digital cinema content according to an embodiment of the present invention. In the following description, portions overlapping with the description of FIG. 1 will be omitted.

Referring to FIG. 2, a digital cinema content package (DCP) input from an external server or a distribution management server 104 includes cinema encryption key data 200, image data 201, sound data 202, and caption data 203. ), Media information 204, and rights information 205. The content analyzer 100 extracts the plurality of pieces of information 200, 201, 202, 203, 204, and 205 from the DCP.

Among the plurality of extracted information, the cinema encryption key data 200, the cinema image data 201, the cinema sound data 202, and the cinema subtitle data 203 are transmitted to the decoder 101. The decryption unit 101 decrypts the encrypted cinematic image, sound, and caption data 201, 202, and 203 based on the cinema encryption key 200. As a result, the decoded cinematic image, sound, and caption data 206 are generated.

The media information 204 may include transcoding information (encoding information for the media format and decoding information of the cinema content format) for converting the cinema content format into the media format and the media format. Decoded cinematic image, sound, and caption data (ie, content data) 206 and media information 204 are transmitted to the media generator 102. The media generator 102 generates media content data 208 that can be used in the user terminal based on the decoded content data 206 and the media information 204. Media content data 208 may also include video, sound, and caption data.

The authority information 205 is transmitted to the authority information processing unit 103, and the media content data 208 is also transmitted to the authority information processing unit 103. The authority information processing unit 103 generates the encrypted package media content 209 by combining the authority information 205 with the media content 208.

3 is a flowchart illustrating a method for processing digital cinema content according to an embodiment of the present invention. In the following description of FIG. 3, portions overlapping with the description of FIGS. 1 and 2 will be omitted.

Referring to FIG. 3, first, when digital cinema content is input to the content analyzer 100 (S1), the content analyzer 100 may encrypt the received cinema content and content data (eg, an image of the cinema content, Sound and caption data) are extracted (S2). The encryption key and content data of the received cinema content are converted into content data decrypted by the decryption unit 101.

The content analyzer 100 extracts media information to be converted (S3). The media information is transmitted to the media generating unit 102. In addition, the content analysis unit 100 extracts the authority information and transmits the authority information to the authority information processing unit 103 (S4).

The media generator 102 generates a media content that can be used in the user terminal based on the decoded content data and the media information (S5). In addition, the authority information processing unit 103 combines the generated media content and the authority information (S6), and generates the encrypted package media content by combining the generated media content and the authority information (S7). . The package media content is then supplied to the user terminal.

The description of the apparatus and method for processing digital cinema contents according to the above-described embodiments of the present invention should be used for descriptive purposes only. Embodiments of the invention are not intended to limit the scope of the claims. In addition to the embodiments of the present invention, it will be apparent that equivalent inventions that perform the same functions as the present invention will also fall within the scope of the present invention.

1 is a block diagram of a digital cinema content processing apparatus according to an embodiment of the present invention.

2 illustrates a processing flow of digital cinema content according to an embodiment of the present invention.

3 is a flowchart illustrating a method for processing digital cinema content according to an embodiment of the present invention.

Claims (1)

A content analyzer extracting encryption key and content data of the received cinema content, media information to be converted, and authority information regarding the cinema content; A decryption unit for decrypting the content data based on the encryption key; A media generator for converting the decoded content data based on the media information to be converted to generate media content for distribution; And a rights information processing unit for generating package media contents by combining the rights information with the distributable media contents.

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