KR101435891B1 - Apparatus and method for generating EPUB file applying digital rights - Google Patents

Abstract

Disclosed is an apparatus for creating an EPUB file to which digital copyright is applied, which creates a work written by using various programs (for example, a word processing program) capable of producing content into the EPUB file of an E-book format. An EPUB configuration unit which previously sets predetermined parameters for creating a work into an EPUB file. A page image creating unit creates an image file for each page of the work, based on at least one of a preset image size or image resolution. An EPUB individual file creating unit creates an individual file which forms E-book content of the work by including a first file consisting of a table of contents of the work and shortcut information thereof, and a second file consisting of publication information of the work. An EPUB packaging unit compresses each file created by the EPUB individual file creating unit into a single file form by a compression mechanism to create the EPUB file. According to the present invention, the EPUB file of the E-book format can be easily created by performing a printing job using a virtual printer after creating the work using various programs (for example, HWP or WORD, that is a word processing program) capable of producing content and, furthermore, DRM can be applied to the EPUB file.

Description

[0001] Apparatus and method for generating EPUB file with digital copyright [0002]

The present invention relates to an apparatus and a method for generating an EPUB file to which digital rights are applied, and more particularly, to a method and apparatus for generating an EPUB file by using a virtual printer in a work created by various programs (for example, a document creating program) To an apparatus and method for generating an EPUB file to which digital copyright is applied.

EPUB (Electronic Publication) is an open, free electronic book standard adopted as an official standard by the International Digital Publishing Forum (IPDF) to replace the pre-September 2007 open eBook standard. The EPUB is designed to be automatically reflowable and can be automatically provided to the user with optimized format and size of the display device.

The specification of EPUB consists of definitions such as OPS (Open Publication Structure), OPF (Open Packaging Format) and OCF (OEBPS Container Format). OPS is the top level definition of the EPUB publication format, which consists of definitions for the modularized configuration specification of EPUB content and definitions for the style sheet and limited use of XHTML or XML. OPF conforms to the OCF standard and defines mechanisms for metadata, read sequence, and information search behavior in the OCF, and OCF specifies a general definition of container technology for EPUB content.

In terms of the physical structure of an EPUB file, EPUB is a single file with an .epub extension, and several components (directories and files) are compressed into a single file by a compression mechanism. Referring to FIG. 1, the 'mimetype' file, the META-INF directory, and the OEBPS directory are included in the root of the EPUB file.

On the other hand, in relation to Digital Rights Management (DRM) for contents provided in the form of an electronic book such as EPUB, there is no standard for enforcing EPUB's copyright management in IDPF and there is no recommendation based on W3C's security XML standard There are issues.

When encryption of electronic book contents is performed in compliance with the EPUB standard of IDPF, 'encryption.xml' file containing key information and algorithm information for performing encryption in the META-INF directory is generated according to W3C security XML standard specification Signatures.xml 'file for storing the information by electronic signature in order to prevent the content from being tampered with or tampered with, and to generate a' rights.xml 'file for controlling the rights of the content user. Here, the contents of encryption, digital signature, and privilege control do not specify a single algorithm, but suggest a recommendation that a specific algorithm and an authorization expression language can be used.

The process of creating an electronic book content file (XHTML, etc.) such as an EPUB is first performed by the author using a document creation program (for example, HWP, WORD, and the like) Create the right HTML. Therefore, in Korea, distributors, rather than authors and publishers, make EPUBs. This leads to more expense for distributors to generate EPUBs, or to a decrease in publisher profit.

Specifically, a related art related to the related art is disclosed in Korean Patent Laid-Open Publication No. 2011-0072327 (entitled " mobile terminal and control method thereof "), which temporarily suspends the copyright of an electronic book, Discloses a method of re-applying copyright after temporarily adding copyright of an e-book to add specific digital content.

Also, U.S. Patent Application Publication No. 2002-0073177 (entitled " Processing content for electronic distribution using a digital rights management system ") relates to a method for processing distribution of content through a computer network, And a method of automatically generating an electronic book by accessing through a DRM system.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a method and apparatus for authoring a work using various programs capable of producing a content (e.g., HWP or WORD as a document creation program) The present invention provides an EPUB file generating apparatus and method that can easily generate an EPUB file, which is a book format, and further apply digital copyrights applicable to DRM.

According to another aspect of the present invention, there is provided a method of authoring a work using a variety of programs capable of producing a content (e.g., HWP or WORD as a document creation program) and then performing a print job using a virtual printer There is provided a computer-readable recording medium storing a program for causing a computer to execute an apparatus and method for generating an EPUB file in which an EPUB file as an e-book format can be easily generated and a digital copyright applicable to DRM can be applied.

According to another aspect of the present invention, there is provided an apparatus for generating EPUB files to which digital rights are applied, the apparatus comprising: An apparatus for generating a file, the apparatus comprising: an EPUB environment setting unit for presetting a predetermined parameter for generating the work as the EPUB file; A page-by-page image generation unit for generating one image file for each page of the work based on at least any one of a preset image size and an image resolution; An EPUB individual file generation unit for generating an individual file constituting e-book contents of the work, including a first file composed of contents and shortcut information of the work and a second file composed of the publication information of the work; And an EPUB packaging unit for compressing each file generated by the EPUB individual file generation unit into a single file format by a compression mechanism to generate an EPUB file.

According to another aspect of the present invention, there is provided a method of generating an EPUB file to which digital rights are applied, the method comprising: applying digital copyright to generate an EPUB file, which is an e-book format, An EPUB file generation method performed by an EPUB file generation apparatus, the EPUB file generation method comprising: (a) EPUB environment setting step of setting a predetermined parameter for generating the work as the EPUB file in advance; (b) a page-by-page image generation step of generating one image file per each page of the work based on at least any one of a preset image size or an image resolution; (c) an EPUB individual file generation step of generating an individual file constituting e-book contents of the work, including a first file composed of the contents of the work and shortcut information and a second file composed of the publication information of the work; (d) a DRM applying step of encrypting the generated page-by-page image using a predetermined encryption key and a predetermined encryption algorithm; And (e) compressing each file generated by the step (c) and the step (d) into a single file by a compression mechanism to generate an EPUB file.

According to another aspect of the present invention, there is provided a computer readable medium storing a program for causing a computer to execute any one of the above methods.

According to the EPUB file generating apparatus and method applying digital copyright according to the present invention, after authoring a work using various programs capable of producing contents (for example, HWP or WORD as a document creating program) It is possible to easily generate an EPUB file, which is an e-book format, and to further apply DRM.

1 is a diagram showing a directory structure of an EPUB file,
FIG. 2 is a block diagram showing a configuration of an EPUB file generating apparatus applying digital copyright according to the present invention;
3 is a block diagram showing the configuration of a DRM application unit according to the present invention.
FIGS. 4 to 10 are diagrams showing an example of details of each file constituting the EPUB file, and FIG.
11 is a flowchart illustrating a flow of performing an EPUB file generation method applying digital copyright according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an apparatus and method for generating an EPUB file using digital copyright according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a detailed configuration of an e-book content composed of an EPUB file that is an e-book format will be described first, and detailed operation of the present invention applied to generation of EPUB contents will be described.

1 is a diagram showing a directory structure of an EPUB file. In terms of the physical structure of an EPUB file, EPUB is a single file with an .epub extension, and several components (directories and files) are compressed into a single file by a compression mechanism. Referring to FIG. 1, the 'mimetype' file, the META-INF directory, and the OEBPS directory are included in the root of the EPUB file. 4 to 10 are diagrams showing an example of details of each individual file constituting the EPUB file. For reference, a portion corresponding to '@@ ... @@' in each individual file shown in FIG. 4 to FIG. 10 is changed to a preset value and stored.

The EPUB file structure has a file called mimetype in its parent folder, which is used as an identifier to distinguish between a general compressed file and an EPUB standard compressed file. As shown in FIG. 4, the mimetype file must contain the phrase "application / epub + zip", and the mimetype file must be stored in an unencrypted format in the package.

The META-INF directory is a meta information directory for structure information, copyright information, encryption information, etc. for e-books. The folder must contain a container.xml file. Referring to FIG. 5, the container.xml file is the first file referred to by the e-book reader. The container.xml file contains the location information of the contents.opf that contains the structure of the actual contents (OPF) of the e-book. This directory includes files (manifest.xml, metadata.xml, signatures.xml, encryption.xml, rights.xml) containing document structure information, additional information, digital signature information, encryption information, can do. The contents.opf file shown in FIG. 6 provides a list of all the files in the epub container, and stores the file sequence definition metadata information. Referring to FIG. 6, when the contents.opf file is opened, it can be seen that it is divided into three configurations of metadata, manifest, and spine.

The toc.ncx file shown in FIG. 7 is related to the table of contents of the book, and ncx supports the multi-level navigation function.

The encryption.xml shown in FIG. 8 is a selectable item and is located at the highest level (META-INF /) of the container file system, and contains all the encryption information for the contents of the EPUB container. The signatures.xml shown in FIG. 9 is also a selectable item and is located at the highest level (META-INF /) of the container file system, and contains digital signature information about the container and the contents. The format for rights.xml shown in FIG. 10 does not have a predetermined standard, but it is recommended that RELs that can be used conform to the requirements defined in the 'Rights and Rules Coordinated Requirement'.

An EPUB file generating apparatus (hereinafter, referred to as an EPUB file generating apparatus) to which the digital copyright according to the present invention is applied is constructed by using various programs (for example, a document creating program) By running a virtual printer on a work, authors can easily create an EPUB file, which is an e-book format.

Hereinafter, an operation of generating an EPUB-based content, which is an electronic book format, generated by the EPUB file generating apparatus according to the present invention will be described as a representative embodiment of the present invention. However, the present invention is not limited to the EPUB-based content, but can be applied to both compressed archive-type content composed of at least one individual file such as EPUB content.

FIG. 2 is a block diagram illustrating a configuration of an EPUB file generation apparatus 100 according to the present invention. FIG. 3 is a block diagram illustrating a configuration of a DRM application unit 500 according to the present invention.

Referring to FIG. 2, an EPUB file generation apparatus 100 applying digital copyright according to the present invention includes an EPUB environment setting unit 200, a page-by-page image generation unit 300, an EPUB individual file generation unit 400, Unit 500 and an EPUB packaging unit 600.

The EPUB environment setting unit 200 sets a predetermined parameter for generating a work created using an EPUB file by using various programs (e.g., a document creating program) capable of producing contents. The predetermined parameters to be set in advance include at least one of image size, image resolution, thumbnail, publication information, table of contents and shortcut information, an encryption key, and a predetermined encryption algorithm.

The page-by-page image generating unit 300 generates one image file for each page of the work based on at least one of the image size or the image resolution set by the EPUB environment setting unit 200 in advance. In particular, the first page image can be further reduced by reducing it to a predetermined thumbnail size.

The EPUB individual file generation unit 400 generates a first file for a table of contents and shortcut information of a work and a second file for publication information of a work to generate a separate file constituting e-book contents for the work. At this time, the first file may be a toc.ncx file containing a table of contents and shortcut information of a work, and the second file may be a contents.opf file containing publication information of a work.

The DRM application unit 500, which is an optional component, encrypts the page-by-page image generated by the page-by-page image generation unit 300 using a predetermined encryption key and a predetermined encryption algorithm. Referring to FIG. 3, the DRM application unit 500 may include an encryption unit 510 and an authority information unit 520. The encryption unit 510 encrypts and stores the individual files included in the e-book content in the form of a compressed archive composed of at least one individual file. The authority information unit 520 controls the access of the user based on the authority information for each user. In addition, the authority information unit 520 grants authority for the 'preview' as much as it has been set in advance, and does not set the authority separately since the authority after purchasing must follow the policy of the service company. At this time, the encryption unit 510 generates the encryption.xml file, and the rights information unit 520 generates the rights.xml file.

An electronic signature unit (not shown) checks whether individual files constituting the EPUB file are falsified / altered, and an electronic signature unit (not shown) generates a signatures.xml file.

The EPUB packaging unit 600 compresses each file generated by the EPUB individual file generation unit 400 and the DRM application unit 500 into a single file format by a compression mechanism to generate an EPUB file. In order to check whether an EPUB file generated in this way is erroneous, it can be confirmed through an EPUB file confirmation unit (not shown) whether it is displayed in an electronic book format using a predetermined tool.

At this time, any one or more of the original file, the original file, the EPUB file compressed and generated by the EPUB packaging unit 600, and the predetermined parameters set by the EPUB environment setting unit 200 are stored in the storage unit (not shown) . Therefore, even if the content of the copyrighted work is modified later, it is possible to reuse the previously set information.

11 is a flowchart illustrating a flow of performing an EPUB file generation method applying digital copyright according to the present invention. First, a virtual printer is executed for a work created by various programs (for example, a document creating program) capable of producing contents in order to generate an EPUB file. Referring to FIG. 11, predetermined parameters for generating an EPUB file for a corresponding work are set in advance (S100). At this time, predetermined parameters to be set in advance may be at least one of image size, image resolution, thumbnail, publication information, table of contents and shortcut information, encryption key, and predetermined encryption algorithm. In addition, you can specify the location and file name where the EPUB file to be created is stored.

After setting the EPUB environment, one image is generated for each page based on at least one of the previously set image size and the image resolution (S110). Then, an EPUB individual file is generated (S120). At this time, the generated EPUB individual file may be a toc.ncx file or a contents.opf file. The toc.ncx file includes the contents of the work and shortcut information, and the contents.opf file can contain the publication information of the work.

In addition, DRM (Digital Rights Management) may be applied separately from the EPUB individual file generation step S120 (S130). If the DRM is applied, the per-page image generated using the predetermined encryption key and the predetermined encryption algorithm is encrypted (S140). Encrypts and stores individual files included in the e-book content in the form of a compressed archive composed of at least one individual file. That is, the encryption.xml file is generated through this process (S150). Also, a rights.xml file for controlling the access of the user is created based on the per-user right information (S160). Then, a signatures.xml file for checking whether each individual file constituting the EPUB file is falsified / altered is generated (S170).

On the other hand, if DRM is not applied (S130), it is determined whether the signature is applied (S165), and the process proceeds to the next step. That is, when the DRM is not applied (S130) and the signature is applied (S165), the EPUB file is generated except for the encryption.xml file and the rights.xml file. Since the signatures.xml file can be applied irrespective of whether DRM is applied or not, the signatures.xml file is determined according to the environment setting.

The EPUB file is generated through a packaging step S180 of compressing each individual file generated through the above-described process into a single file format by a compression mechanism. Furthermore, at least one of the original file as the original work, the EPUB file generated by compressing the individual files, and predetermined parameters set in advance are stored in the storage means (S190). Through this process, the author can generate an EPUB file by simply executing a virtual printer for a work created by various programs (for example, a document creating program) capable of producing contents.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and a carrier wave (transmission via the Internet). In addition, the computer-readable recording medium may be distributed to a computer system connected to a wired / wireless communication network, and a computer-readable code may be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the embodiment in which said invention is directed. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

100: EPUB file generating device
200: EPUB environment setting unit
300: page-by-page image generation unit
400: EPUB individual file generation unit
500: DRM application section
600: EPUB packaging section

Claims (19)

An apparatus for generating an EPUB file to which a digital copyright is applied for creating a work created using a document creating program as an EPUB file in an e-book format,
An EPUB environment setting unit for setting at least one parameter for generating the work as the EPUB file;
A page-by-page image generation unit for generating an image file for each page of the work based on the set parameter;
An EPUB individual file generation unit for generating individual files constituting e-book contents of the work including a first file composed of contents and shortcut information of the work and a second file composed of the publication information of the work; And
And an EPUB packaging unit for compressing the individual files and the page-by-page image files into a single file to generate the EPUB file. The method according to claim 1,
Further comprising a DRM application unit for encrypting the generated page-by-page image file using an encryption key and an encryption algorithm set in advance. The method according to claim 1,
Wherein the parameter includes at least one of image size, image resolution, thumbnail, publication information, table of contents, and shortcut information. The method according to claim 1,
Wherein the first file is a toc.ncx file and the second file is a contents.opf file. 3. The method of claim 2,
The DRM application unit,
An encryption unit for encrypting and storing the page-by-page image file; And
And generating an access control information for controlling a user's access to the encrypted page-by-page image file based on the per-user rights information. 6. The method of claim 5,
Further comprising an electronic signature unit for verifying whether or not each individual file constituting the EPUB file is altered or not. The method according to claim 6,
The encryption unit generates an encryption.xml file,
The rights information unit generates a rights.xml file,
Wherein the digital signature section generates a signatures.xml file. The method according to claim 1,
Further comprising a storage unit for storing at least one of an original file as an original work, an EPUB file compressed and generated by the EPUB packaging unit, and a parameter set by the EPUB configuration unit. Device. The method according to claim 1,
Wherein the EPUB file is generated from the work created by the document creation program by executing a virtual printer. The method according to claim 1,
Further comprising an EPUB file verifying unit for verifying whether the EPUB file is displayed in an electronic book format and verifying whether the EPUB file is erroneous. A method of generating an EPUB file, which is performed by an EPUB file generating apparatus to which a digital copyright is applied by generating a work created using a document creating program as an EPUB file in an e-book format,
(a) setting at least one parameter for generating the work as the EPUB file;
(b) generating an image file for each page of the work based on the set parameters;
(c) generating individual files constituting the e-book contents of the work, including a first file composed of the contents of the work and shortcut information and a second file composed of the publication information of the work; And
(d) compressing the individual files and the page-by-page image file into a single file to generate the EPUB file. 12. The method of claim 11,
Wherein the parameter comprises at least one of image size, image resolution, thumbnail, publication information, table of contents, and shortcut information. 12. The method of claim 11,
Wherein the first file is a toc.ncx file and the second file is a contents.opf file. 12. The method of claim 11,
(e) encrypting the page-by-page image file; And
(e) generating access control information for controlling access of the user to the encrypted page-by-page image based on the per-user right information. Way. 12. The method of claim 11,
(g) checking whether each individual file constituting the EPUB file is modulated or not. 12. The method of claim 11,
(h) storing at least one of the original file, the EPUB file, and the parameter, which is the original copyrighted work, in the EPUB file. 12. The method of claim 11,
Wherein the EPUB file is generated from the work by executing a virtual printer. 12. The method of claim 11,
(i) checking whether the EPUB file is displayed in an e-book format to check whether the EPUB file is erroneous. A computer-readable recording medium having recorded thereon a program for causing a computer to execute a method of generating an EPUB file to which digital copyright is applied according to any one of claims 11 to 18.

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