KR100988120B1 - Integrated storage format for efficient storage/management/consumption of digital contents, and method and system for offering electronic comic contents service using the same - Google Patents

Abstract

The present invention provides an integrated storage format for efficient storage / management / distribution / consumption of digital content in storing digital cartoon content in a storage medium.

The present invention relates to an m-dat file unit in which substantial data constituting the digital content is stored in a file, a metadata unit including metadata for the digital content, and an M-dot file unit designated by the metadata. Refers to a service and a system that provide an integrated storage format of digital content including a trackbox unit including detailed information about a file.

Digital Content, Metadata, MPEG-21

Description

INTEGRATED STORAGE FORMAT FOR EFFICIENT STORAGE / MANAGEMENT / CONSUMPTION OF DIGITAL CONTENTS, AND METHOD AND SYSTEM FOR OFFERING ELECTRONIC COMIC CONTENTS SERVICE USING THE SAME}

The present invention relates to an integrated storage format for efficient storage / management / consumption of digital contents. In particular, the present invention relates to an integrated storage format for efficient storage / management / consumption of digital cartoon content, metadata, user data, and dialogue text in various languages. The present invention relates to a format and a digital comic content service system and method using the same.

The present invention is derived from the research conducted as part of the IT growth engine technology development project of the Ministry of Information and Communication and the Ministry of Information and Telecommunications Research and Development. [Task Management No .: 2006-S-082-02, Title: Development of customized viewing type DMB technology] .

In general, digital content is stored, managed, and consumed through a personal computer, a portable mobile multimedia player, or the like. The digital content includes digital cartoon content, MP3 music files, moving picture data, pictures, and the like, and is consumed by various digital terminals. Herein, the term "digital terminal" is assumed to be a generic term for a terminal capable of consuming digital cartoon content. Specific examples of the digital terminal include a portable multimedia player (PMP), a personal computer, a personal digital assistant, and the like.

1 illustrates an example of an integrated multimedia file format for digital content according to the prior art.

The integrated multimedia file format shown in FIG. 1 represents a file format including audio compressed data, image data, text data, content protection metadata, and license metadata among digital contents.

Referring to FIG. 1, at least one image related to the audio compression data (eg, a singer photo, a song album photo, a story related content (comic) picture, a word photo related to the location of a tongue related to a word pronunciation, a description of a sentence related to a language conversation) Image data), audio-related text data (song lyrics text, story sentence text, language sentence text, pronunciation word text, etc.), script data to animate images, videos, text data, synchronization data between each data, Content protection information related to the protection (encryption) of the data MPEG- to compose video, image and text data including license information metadata such as metadata and usage rights for related content into one data together with audio compressed data. 4 Use the file format structure. Here, ftyp means a file type, a moov includes a track box specifying respective metadata, and mdat includes respective data related to each track box, Meta includes metadata specified in each track box. Within this meta box may include at least one of content protection metadata, license information metadata and asynchronous MPEG-7 metadata, and content protection metadata, license information metadata and asynchronous using MPEG-21 DID. At least one of the MPEG-7 metadata may be recorded, and the content protection metadata and license information metadata may indicate content protection information using the MPEG-21 Intellectual Property Management and Protection (IPMP) Components standard.

The integrated multimedia file format according to the related art is related to audio contents, and is difficult to apply to generation, storage, management, and consumption of various digital contents, and does not reflect various functions according to the development of digital terminals.

In particular, in recent years, since most digital content consumers can consume digital content in the form of digital electronic comic books using digital terminals, it is difficult to apply the integrated multimedia file format according to the prior art to such digital cartoon content. .

The digital comic book tool according to the prior art for the consumption of the digital comic content, simply because it reads and displays a number of image files one by one, does not meet the needs of various users.

The users of the digital cartoon content go beyond simply viewing an image file and intend to collect, reuse, edit, and share the content.

In addition, the users of the digital cartoon content wants a response to the other user's content, the results of the response and various additional information.

Therefore, a new digital content format is required to meet various needs of users of such digital cartoon content, and a digital cartoon content service system and method using the same are required.

The present invention has been devised to solve the problems of the prior art as described above, and an object of the present invention is to provide an integrated storage format for efficient storage / management / consumption of digital content in storing digital cartoon content in a storage medium. To provide.

It is another object of the present invention to provide a digital cartoon content service system and service method using an integrated storage format of digital content.

In order to achieve the above object and solve the problems of the prior art, an embodiment according to the present invention includes at least one of digital comic content, other language dialogue text of the digital comic, additional content, user data added in the user terminal An mdat file unit in which data is stored as a file;
A metadata unit including metadata about the digital cartoon content and metadata about the user data; And
And a trackbox unit including detailed information about a file stored in the M-dot file unit specified by the metadata for the digital cartoon content or the metadata for the user data, wherein the metadata for the digital cartoon content includes: Includes a plot, author information, bibliographic information, publisher information, reader preference information of the digital cartoon content, the metadata for the user data, page information of the digital cartoon content to which the user data is added, the user terminal is added Provided is a computer readable recording medium having recorded therein an integrated storage format of digital content, including the size and location of the user data, and the color information of the user data added by the user terminal.

According to another embodiment of the present invention, there is provided a content storage unit for storing contents required for a digital cartoon content service, a digital rights obtaining unit for acquiring rights for digital cartoon content from a service provider, and digital cartoon content and addition from the content storage unit. A content acquiring unit for acquiring content, another language dialogue acquiring unit for acquiring another language dialogue text of the digital cartoon content, and metadata necessary for the digital cartoon content, the additional content, the other language dialogue text, and respective contents; The present invention provides a digital comic book content service device including an integrated content generation unit for generating integrated content of an integrated storage format.

According to another embodiment of the present invention, an integrated content acquisition unit for acquiring digital content in an integrated file format, a decoder for decoding the obtained digital content, and a user data generation unit for generating user data related to the digital content ( And an integrated content generation unit for generating integrated content by adding the generated user data to the digital content in the integrated file format.

According to another embodiment of the present invention, an mdat file unit in which substantial data constituting digital content is stored as a file, a metadata unit including metadata about the digital content, and the metadata designated by the metadata Generating an integrated storage format of digital content including a trackbox unit including detailed information of a file stored in an M-dot file unit; acquiring and consuming an integrated storage format of the digital content; A method of providing digital content, the method comprising adding user data to an integrated storage format of content.

According to the present invention, rather than the conventional simple cartoon content consumption, cartoon content, metadata, user data, dialogue text and additional content of different languages are stored on the storage medium using a single integrated cartoon content format. It can be stored, integrated, managed, edited and delivered.

In addition, according to the present invention, it is possible to store the user data, such as content and metadata, user preferences, and viewing information, which are created or edited by the user, and to play back in synchronization with the spatial information, thereby allowing other users to share their personal experiences. Can be.

In addition, the present invention can be applied to educational cartoon content, general electronic books, electronic story books, electronic albums (electronic photographs) and the like. In particular, when consuming English comic content, you can enter and store information such as your own notes or expressions. In addition, it is possible to change the dialogue text expressed in English to Hangul or another language, and the dialogue text can be modified by the user and leave a trace of personal use. In addition, the user's preference for the comic book and the content of the comic book can be evaluated using metadata so that other users can view the information and refer to the overall opinion of the comic book.

Therefore, it is possible to create and store personalized content in the future, and to convey opinions of other users.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terminology used herein is a term used to properly express a preferred embodiment of the present invention, which may vary according to a user, an operator's intention, or a custom in the field to which the present invention belongs. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

In the present specification, the term digital terminal refers to a terminal capable of consuming digital electronic cartoon content. Specific examples thereof include a portable multimedia player (PMP), a personal computer, a personal digital assistant (PDA), and the like.

In the embodiment of the present invention, the additional content means additional content of digital cartoon content in the digital terminal. That is, the additional content means audio, video, text, document, image, and the like, which are bibliographic information, title, author information, plot, and dialogue provided from the service provider.

In the present specification, the storage medium is a medium for storing digital data and includes a hard disk, a memory, an external storage device, a network storage device, a CD, a DVD, an HD-DVD, a Blu-ray disc, and the like.

In the present specification, user (generated) data collectively refers to personalized information and content generated by the user's intention and consumption, and examples thereof include information about the user's used materials and edited content and metadata, This includes preference information and consumption information.

In the present specification, the text is divided into a text used for dialogue in another language in a publisher or a server for providing a digital comic book, a text for providing a simple information, and a text generated by a user's intention.

In the present specification, MPEG-7 metadata collectively refers to metadata provided in the MPEG-7 standard used for additional information of digital cartoon content and information for data generated by a user's intention.

In the present specification, MPEG-21 metadata collectively refers to metadata provided in the MPEG-21 standard used for information on consumption rights and management of content.

2 is a block diagram showing the configuration of a digital cartoon content service device according to an embodiment of the present invention.

Referring to FIG. 2, the digital cartoon content service device (server) 200 includes a content storage unit 201 that stores contents necessary for digital cartoon content service, and a digital authority for acquiring rights for digital cartoon content from a service provider. An acquisition unit 202, content acquisition units 203 and 204 for acquiring digital cartoon content and additional content from the content storage unit, and another language dialogue acquisition unit 207 for acquiring different language dialogue text of the digital cartoon content. And a unified content generation unit 208 for generating unified content in a unified storage format including the digital cartoon content, the additional content, the different language dialogue text, and respective metadata.

The digital cartoon content service device 200 may further include a metadata acquisition unit 206 for acquiring metadata related to the acquisition, protection, and management of the digital cartoon content, additional content, and digital cartoon content.

Also, the digital cartoon content service device 200 may further include a digital content protection / management unit 206 for analyzing and managing the digital rights acquired by the digital rights obtaining unit 202.

The content storage unit 201 may store digital content and additional content stored therein, metadata about each content, digital content received from a remote site, metadata about the content, and dialogue text in another language. Save it.

The digital rights acquisition unit 202 performs a function of acquiring a right to play, store, edit, exchange, and consume digital cartoon content from a service provider in a terminal.

The content obtaining units 203 and 204 may include a digital cartoon content obtaining unit 203 and an additional content obtaining unit 204.

The digital cartoon content acquired by the digital cartoon content acquisition unit 203 may be in the form of several image files by a service provider scanning a comic book one by one. In addition, the digital cartoon content may be in the form of an image file produced according to a digital content format by a publisher.

In addition, the digital cartoon content is composed of each image, the image represents the content of the cartoon content. The image may also include a related image (manga content image, artist's photo, cover photo, plot, image including addition degree) required in the comic book. Here, one image is assumed to be a page of one comic book.

The digital cartoon content obtaining unit 203 acquires image files. In addition, information (file name, size, image file format, etc.) for each image is also acquired.

The additional content acquisition unit 204 acquires content provided in the form of video, audio, text, website, and the like for additional content provided by the server 200 (surge information, plot, title, user preference, etc.). do.

The digital content protection / management unit 206 may encrypt and manage digital cartoon content, and if there is no right for protection, the integrated content is generated by the digital cartoon content itself.

The other language conversation obtaining unit 207 obtains the conversation text in another language stored by the service provider. Digital cartoon content consists of cartoon images and dialogue text in one language. Thus, the service provider may provide dialog text in a language different from the existing language for the user's request for additional languages. Since each conversation text is arranged for each page based on each image page of the digital cartoon content, the other language dialogue acquiring unit 207 provides the index and position information of the dialogue text of each page of the digital cartoon content. Have.

The integrated content generation unit 208 may include a digital rights acquisition unit 202, a digital cartoon content acquisition unit 203, an additional content acquisition unit 204, a metadata acquisition unit 205, and a dialogue text acquisition unit in a different language ( 207 encodes all the content and related information into one unified cartoon content format 209.

The generated unified content 209 of the unified storage format may be stored through the DVD / USB device and consumed in the user terminal or transmitted to the user terminal through the IP network 210 for consumption.

3 is a diagram illustrating a unified storage format of digital content generated in a server according to an embodiment of the present invention.

Referring to FIG. 3, an integrated storage format 209 of digital content includes an mdat file unit (mdat box) 310 in which substantial data constituting digital content is stored as a file, and a meta data for the digital content. A moov unit including a metadata unit 331 including data and track box units 322 to 324 including detailed information about a file stored in the M-dot file unit designated by the metadata. 320).

The integrated storage format of the digital content may use an ISO based media file format and an MPEG-4 file format structure.

The unified storage format 209 of the digital content further comprises a "ftyp" 330 that specifies a file type.

The unified storage format 209 of the digital content may know its file type through "ftyp" 330. For example, if 'mp4' is described in major_brand (ftyp), it can be seen that the file is related to mp4.

The M-box unit 310 includes an image 311 having contents of cartoon content, conversation text 312, and additional content 313.

The track 1 322 of the move unit 320 has a sample table for referring to related information such as the size and position of the image of the digital cartoon content and the position information of the dialogue text. The sample table provides access to an image file 311 which is a substantial JPEG of the m-file unit 310.

Track 2 323 contains information of the different language dialogue text of the digital comic content. The user terminal may access the actual conversation text 312 with reference to the information in track 2 323.

Track 3 324 includes information of additional content (sample table of additional content). The user terminal may access the substantial data 313 of the additional content using the sample table of the additional content.

Referring to FIG. 3, the MPEG-7 metadata has information (eg, bibliographic information, titles, reader preferences, plots, and the like) about additional content related to digital cartoon content. The MPEG-7 metadata is contained in an “xml” box of the metadata unit 321. There may also be an "xml" box inside the Track box. For example, when the additional content is an audio file "xx.mp3", additional information metadata corresponding to the audio file is included in the "xml" box in the additional content track.

In addition, MPEG-21 metadata includes information on the protection (encryption) of digital cartoon content, management information, and authority information. Each item in the IPMP: DIDL format has resource and IPMP information. ) Provides reference and protection-related information about the content. The reference information may have protection information for substantially all of the cartoon content of track 1 322, or may have rights information for each individual content separately.

The metadata unit 321 refers to a box that can contain additional information of substantial files stored in the unified storage format 209. The track boxes 322 to 324 may display physical locations and types of the actual data in the unified storage format 209. On the other hand, the metadata unit 321 stores additional information, among which, for example, information of the metadata of mpeg-7 belongs to it. In addition, the additional information may also be included.

In addition, the metadata unit 321 may include additional information such as the title of the image, the author of the cartoon, and the time of creation.

In addition, the metadata unit 321 may include at least one of bibliographic information, rating information, recommendation information, preference information, history information, and link information of related data.

The metadata unit 321 includes "iloc" and "iinf" boxes containing location information and content information related to each item.

The " iloc " indicates location information, offset, and length of the item included in the track box portions 322 to 324. For example, if a picture is item1, the offset information, location information, and size indicating the location in the file of item 1 is known, thereby facilitating access to the actual data (mdat).

The "iinf" is a box indicating information of an item, and the item is a box in which type information such as text, audio, video, and encoding information can be known.

Meanwhile, the image of the digital cartoon content may be not only JPEG, but also other formats such as PNG, BMP, TIFF, and GIF.

The track box units 322 to 324 have information about substantial data contained in the M-pile unit 310. Tkhd in the track box portions 322 to 324; Enter boxes mdia, mdhd, hdlr, minf, stbl, and so on. Each box shows information about a file contained in the M.P. file unit 310, and the actual data type, size, number of samples, and samples of the respective track track box sections 322 to 324 for the file. It has detailed information such as sugar length.

4 is a block diagram showing the configuration of a digital content consumption device (user terminal) according to an embodiment of the present invention.

Referring to FIG. 4, the user terminal 400 consumes digital content of the integrated file format through the DVD / USB device and the IP network 410.

The digital content may include, but is not limited to, digital cartoon content generated by the digital cartoon content service device.

The user terminal 400 includes an integrated content acquisition unit 403 for acquiring digital content in an integrated file format, a decoder 405 for decoding the acquired digital content, and generating user data related to the digital content. And an integrated content generation unit 402 for generating an integrated file format 411 by adding the generated user data to the digital content of the integrated file format.

The user terminal 400 may further include a metadata interpretation / content usage control unit 404 that performs an authentication function for a usage right related to encryption or protection of related content through interpretation of metadata.

The user terminal 400 may further include a user interface 401 for consumption of digital content.

The user terminal 400 may further include a metadata consuming unit 407 for consuming metadata analyzed through the metadata analysis / content usage control unit 404. The metadata consuming unit 407 provides a service using additional information on the digital cartoon content or provides a reference function for the additional content related to the digital content.

The user terminal 400 may further include a user related metadata generator 409 for generating metadata about the user data.

For example, the additional information service provided through the various metadata may move and search to a page desired by the user using table of contents information. In addition, when the digital content is digital cartoon content, the metadata includes a plot, author information, bibliographic information, publisher information, reader preference information, and the like, and thus, may provide a variety of services than conventional electronic comic books. .

The reference function through the metadata may refer to actual user data using reference information generated through user related metadata.

In addition, the meta data may refer to a homepage related to digital comic content or a blog having related information in URL format.

The user terminal 400 may further include an integrated content consumption unit 406 for consuming (displaying or playing) the digital content in the integrated file format. The integrated content consumption unit 406 allows the decoded digital content, user data, additional content, etc. to be consumed through the user interface unit 401 according to a user's request.

The integrated content acquisition unit 403 obtains a file of the integrated content format, extracts the digital cartoon content, the additional content, the metadata, and the dialogue text of another language, and stores them in a buffer to be consumed according to the user's intention (consumption preparation). It performs the function.

The decryption unit 405 performs decryption for each content and consumes the corresponding content when authentication is obtained by the metadata analysis / content usage control unit 404.

The user data generation unit 408 generates a digital cartoon content and user data by synchronization information. The user related metadata generator 409 generates user related metadata for user data created by the user using the user interface unit 401 using digital cartoon content and synchronization information.

The user-related metadata includes the configuration information and the synchronization information of the user data in the form of Table 1 below.

TABLE 1

[Table 1] describes the type of user data, spatial configuration information, and synchronization information.

That is, Table 1 shows an example of data that requires configuration information and synchronization information among user data generated by the user data generation unit 408.

Referring to [Table 1], user-related metadata is divided into three types, Graphic, Tex, and dialogue_text.

The graphic represents a memo drawn by a user on a screen using a pointing device (eg, a mouse, a keyboard, or a touch pen).

In addition, referring to [Table 1], user-related metadata includes color information consisting of "RGB" (red, green, blue), "Rectangle" (square), "Circle" (circle), and "Line" ( It has memo type information composed of line).

Although the synchronization information in [Table 1] is "index_page", the dialogue_text type can confirm the synchronization information by "index_page" information and "index_dialogue" information. There may be one or more dialogue_text of the page by checking the synchronization information, and the user may flip the page back and forth using the user interface. The "page" is equivalent to one cartoon content image.

"Size" and "Location" in Table 1 above are size and position information of user data in cartoon content. Here, the size and position information of the graphic is represented by "Point" (left-top, upper left endpoint, right-bottom, coordinates of the lower right endpoint). The location information of Dialogue_text also uses Point. The point information refers to the position of the dialogue text included in the cartoon content. "Message" represents the text content entered by the user.

An example of an application service using the user data type, spatial configuration information, and synchronization information is as follows.

The user can view English-language comic content through the digital terminal, and can use the mouse of the digital terminal to input the graphic such as underline and circle for important definitions on the screen, and input the address of the relevant cartoon content. The image on the page can be easily saved in text format.

In addition, the dialogue text of the comic can be modified with the words that are easy to remember. As an additional function, you can check the dialogue text of the cartoon content in English in the dialogue text with the English / English conversion button to see how English is considered in Korean. The screen position information of the Graphic, Text, and Dialogue_text data input by the user is the configuration information of the user data, and the synchronization information is the reference information of the digital cartoon content and the user data.

The user-related metadata generator 409 may refer to the actual position and page information of the comic content by applying the spatial information and the synchronization information illustrated in Table 1 to the metadata.

In addition, the user-related metadata generator 409 may support a user history function and a user recommendation function. The user history function stores the corresponding page in the user metadata when the user views the specific page of the digital cartoon content through the terminal and terminates the program (such as when a telephone comes in and turns off the terminal). Thus, when the user again consumes the content after several hours through the user terminal, the user history is maintained through a message asking whether to view the specific page. The user recommendation function is to display the recommendation information for the content as an index of 1 to 10 while consuming digital content in the digital terminal. If 10 is the most interesting, the user stores that information through user metadata. Stored recommendation information can be sent to the server or referred to before other users consume the digital comic content.

5 is a diagram illustrating a configuration of digital content of an integrated file format generated in a user terminal according to an embodiment of the present invention.

Referring to FIG. 5, the digital content of the integrated file format generated by the digital content terminal includes the track box unit 510 for user data 520 and user related metadata in the digital content configuration of the integrated file format shown in FIG. 4. It is configured to further include.

In addition, the digital content of the integrated file format generated by the user terminal may or may not use protection-related metadata. If the authentication process has already been performed, the protection-related metadata may be omitted. However, when a user distributes to another user, authority or protection related information is added again.

The user data 520 is memo, text, audio clip, graphic, or the like. As described above, the user data may include various data according to the user's selection, and the track box and the file may be further added according to the corresponding user data.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

1 illustrates an example of an integrated multimedia file format for digital content according to the prior art.

2 is a block diagram showing the configuration of a digital cartoon content service device according to an embodiment of the present invention.

3 is a diagram illustrating a unified storage format of digital content generated in a server according to an embodiment of the present invention.

4 is a block diagram showing the configuration of a digital content consumption device (user terminal) according to an embodiment of the present invention.

5 is a diagram illustrating a configuration of digital content of an integrated file format generated in a user terminal according to an embodiment of the present invention.

Claims (16)

An mdat file unit for storing data including a digital cartoon content, other language dialogue text of the digital cartoon, additional content, and user data added by the user terminal as a file; A metadata unit including metadata about the digital cartoon content and metadata about the user data; And A trackbox unit including detailed information about a file stored in the m-dot file unit specified by the metadata for the digital cartoon content or the metadata for the user data, Metadata about the digital cartoon content includes the plot, author information, bibliographic information, publisher information, reader preference information of the digital cartoon content, The user data includes modified contents of the dialogue text included in the digital cartoon content, text and graphics input by the user through the user terminal, Metadata for the user data, 1) page information of digital cartoon content to which the user data is added, for page synchronization of the digital cartoon content and user data, 2) information for screen configuration of the page to which the user data is added, the size and position of the user data added in the user terminal, color information of the user data added in the user terminal, 3) history information for a specific page of digital comic content that the user has consumed and recommendation information for the digital comic content; A computer-readable recording medium that records an integrated storage format for digital cartoon content. delete The method of claim 1, History information for a specific page of the digital cartoon content is stored at the end of the program providing the digital cartoon content, A computer-readable recording medium that records an integrated storage format for digital cartoon content. The method of claim 1, Recommended information about the digital cartoon content, Sent to the server or provided for reference by other users, A computer-readable recording medium that records an integrated storage format for digital cartoon content. The method of claim 1, Metadata for the digital cartoon content, And at least one of bibliographic information, rating information, and link information of related data of the digital cartoon content. A computer-readable recording medium that records an integrated storage format for digital cartoon content. delete delete delete delete An integrated content acquisition unit for acquiring digital cartoon content in an integrated file format; A decoder which decodes the obtained digital cartoon content; A user data generator for generating user data related to the digital cartoon content; An integrated content generation unit configured to generate integrated content by adding the generated user data to the digital content in the integrated file format; And And a user related metadata generator for generating metadata about the user data. Metadata about the digital cartoon content includes the plot, author information, bibliographic information, publisher information, reader preference information of the digital cartoon content, The user data includes modified contents of the dialogue text included in the digital cartoon content, text and graphics input by the user through the user terminal, Metadata for the user data, 1) page information of digital cartoon content to which the user data is added, for page synchronization of the digital cartoon content and user data, 2) information for screen configuration of the page to which the user data is added, the size and position of the user data added in the user terminal, color information of the user data added in the user terminal, 3) history information for a specific page of digital comic content that the user has consumed and recommendation information for the digital comic content; Digital content consumption device. delete delete delete The method of claim 10, History information for a specific page of the digital comic book content is stored at the end of a program providing the digital comic book content. An m-dat file unit for storing data including a digital cartoon content, other language dialogue text of the digital cartoon, additional content, and user data added by the user terminal as a file; A metadata unit including metadata about the digital cartoon content and metadata about the user data; And a trackbox unit including detailed information about a file stored in the M-dot file unit designated by the metadata for the digital cartoon content or the metadata for the user data. ; Acquiring and consuming the unified storage format of the digital content; And Adding user data to the unified storage format of the digital content in the consuming process, Metadata about the digital cartoon content includes the plot, author information, bibliographic information, publisher information, reader preference information of the digital cartoon content, The user data includes modified contents of the dialogue text included in the digital cartoon content, text and graphics input by the user through the user terminal, Metadata for the user data, 1) page information of digital cartoon content to which the user data is added, for page synchronization of the digital cartoon content and user data, 2) information for screen configuration of the page to which the user data is added, the size and position of the user data added in the user terminal, color information of the user data added in the user terminal, 3) history information for a specific page of digital comic content that the user has consumed and recommendation information for the digital comic content; Service method of digital content. delete

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