JP6026657B2 - Information recording medium storing content, content providing method, content reproducing method and apparatus thereof - Google Patents

Description

  The present invention relates to an information recording medium storing content, a method for providing content, a method for reproducing content, a content providing apparatus, and a content reproduction apparatus.

  As an information recording medium for providing multimedia contents, an optical disc such as a Blu-ray (registered trademark) disc or a DVD (digital versatile disc) is used. The content recorded on these optical disks is composed of a plurality of files and has a predetermined directory structure. In this way, when content consisting of several files and having a unique directory structure is copied or moved to a medium using a different file system, it is expected to maintain this function. It is difficult to guarantee or guarantee. That is, it is difficult to play back the multimedia content using a device that uses a different file system.

  The present invention provides an information recording medium for efficiently storing content component files (content component files) transmitted from an information recording medium on which content is recorded, and reconfiguration as described above. A method for providing reconstructed content, a method for reproducing reconstructed content, an apparatus for providing reconstructed content, an apparatus for reproducing reconstructed content, and the providing method or reproducing method It is for providing the recording medium which recorded the program to perform.

  The present invention is also for effectively providing and playing back a content component file transmitted from a medium having a slow loading speed among information recording media. An information recording medium with a slow loading speed is not only a physical medium such as an optical disk, but also a case where the download speed is relatively low compared to a local storage device, such as when downloaded by a server via the Internet. included.

  The present invention is also for effectively providing and playing back a content component file transmitted from the medium when it is difficult to access a part of the medium due to an external factor. A medium that is difficult to access due to external factors means a medium that cannot read information required by the reader from all or a part of the medium due to various factors such as contamination, scratches, physical shocks, and destruction.

  An information recording medium according to an embodiment of the present invention includes one container file, and the container file includes a data box in which a plurality of component files constituting the content are arranged; and the content files of the plurality of component files A meta box including information on a position and information on a position in the data box and characteristic information of the plurality of component files. The plurality of component files are arranged in the data box according to the characteristic information. May be.

  According to an embodiment of the present invention, component files having the same or similar characteristics may be recorded at consecutive positions in the data box according to the characteristic information.

  The characteristic information according to an embodiment of the present invention may include information indicating an access pattern during reproduction of the plurality of component files.

  The access pattern according to an embodiment of the present invention may indicate at least one of random access, multiple access, disposable access, and preload.

  The characteristic information according to an embodiment of the present invention may further include information indicating characteristics of a plurality of extents constituting the component file.

  Information indicating extent characteristics according to an exemplary embodiment of the present invention may indicate a mutual relationship between the plurality of extents.

  The information indicating the characteristics of the extent according to an embodiment of the present invention includes whether the extent is referred to when other extents are reproduced, and whether the extent is essential for reproducing other extents. In addition, it is possible to indicate at least one of whether at least a part of the extent can be replaced by another extent.

  The container file according to an embodiment of the present invention may further include a copy book of the metabox.

  A container file according to an embodiment of the present invention may have a file name indicating the characteristic information.

  The file name of the container file according to an embodiment of the present invention may indicate what characteristic component file is recorded in at least one of the plurality of sections constituting the data box.

  According to an embodiment of the present invention, there is provided a content providing method comprising: obtaining a plurality of component files constituting the content; obtaining characteristic information related to the plurality of component files; and the plurality of components based on the characteristic information. Generating a data box in which a file is arranged; generating a meta box including the position of the plurality of component files in the content, information related to the position in the data box, and the characteristic information; Generating a container file including the data box and the meta box.

  The data box generation step according to an embodiment of the present invention may include a step of arranging component files having the same or similar characteristics according to the characteristic information at consecutive positions in the data box.

  The content providing method according to an embodiment of the present invention may further include recording a copy book of the metabox in the container file.

  The container file generation step according to an embodiment of the present invention may include a step of assigning a file name indicating the characteristic information to the container file.

  A content playback method according to an embodiment of the present invention includes a data box in which the plurality of component files are arranged according to characteristic information related to the plurality of component files constituting the content; and a position in the content of the plurality of component files. , And a meta box including information related to the position in the data box and characteristic information related to the plurality of component files; from an information recording medium including one container file recorded therein, the meta box is included in the meta box Reading the information, referring to the information in the metabox, reading the data recorded in the data box, using the information in the metabox and the data read from the data box, Stage to play the content, and Or it may be you.

  According to one embodiment of the present invention, the data reading step reads data corresponding to a component file having characteristic information indicating random access or multiple access from the information recording medium, and has a higher loading speed than the information recording medium. A step of loading the information recording medium may be included.

  Reading data according to an embodiment of the present invention may include preloading a predetermined portion of data corresponding to a component file having characteristic information indicating preload.

  The content reproduction step according to an embodiment of the present invention may include a step of mapping a path in the content of each component file and an address in the data box with reference to information in the metabox.

  The content playback step according to an embodiment of the present invention may include a step of playing back the plurality of extents with reference to a correlation characteristic between the plurality of extents.

  In the content reproduction method according to an embodiment of the present invention, an extent that is referred to when reproducing the other extent or is indispensable for reproducing the other extent cannot be read from the information recording medium. The method may further include the step of reading the extent again or receiving the extent from an external device.

  The content reproduction method according to an embodiment of the present invention refers to the other extent and reproduces the extent section when an extent that can be replaced by the other extent cannot be read from the information recording medium. A step may further be included.

  An apparatus for providing content according to an embodiment of the present invention includes: an input unit configured to acquire a plurality of component files constituting content and characteristic information related to the plurality of component files; Is generated, a meta box including a position in the contents of the plurality of component files, information related to the position in the data box, and the characteristic information is generated, and the data box and A control unit that generates one container file including the metabox; and a storage unit for storing the generated container file may be included.

  A content playback apparatus according to an embodiment of the present invention includes a data box in which the plurality of component files are arranged according to characteristic information related to the plurality of component files constituting the content; and a position in the content of the plurality of component files. , And a meta box including information related to the position in the data box and characteristic information related to the plurality of component files; from an information recording medium including one container file recorded therein, the meta box is included in the meta box A reading unit that reads information; a reproduction unit that reproduces the content; and information in the meta box, and controls the reading unit to read data recorded in the data box, Read from the data box Using the the data, to reproduce the content, the control unit for controlling the reproduction portion; may contain.

It is drawing for demonstrating the structure of the container file concerning one Embodiment of this invention. It is drawing for demonstrating the meta information concerning one Embodiment of this invention. 1 is a diagram illustrating a file system configuration on a Blu-ray disc according to an embodiment of the present invention; It is a figure for demonstrating the relationship between the meta information and component file concerning one Embodiment of this invention. It is drawing for demonstrating the meta information concerning other embodiment of this invention. It is drawing for demonstrating the structure of the container file concerning other embodiment of this invention. It is drawing for demonstrating the characteristic information concerning one Embodiment of this invention. It is drawing for demonstrating the characteristic information concerning other embodiment of this invention. It is a block diagram for demonstrating the content provision apparatus concerning one Embodiment of this invention. It is a flowchart for demonstrating the content provision method concerning one Embodiment of this invention. It is a block diagram for demonstrating the content reproduction apparatus concerning one Embodiment of this invention. It is a flowchart for demonstrating the content reproduction method concerning one Embodiment of this invention. It is a figure for demonstrating the component file copied to RAM of the content reproduction apparatus concerning other embodiment of this invention. 3 is a diagram illustrating a correlation between extents and playback time according to an exemplary embodiment of the present invention. It is drawing for demonstrating the backup information of the metabox concerning one Embodiment of this invention. 4 is a diagram for explaining a container file including a MEBO box according to an embodiment of the present invention.

  The terms used in this specification will be briefly described, and the present invention will be specifically described.

  The terminology used in the present invention was selected as a general term that is currently widely used as much as possible while considering its function in the present invention, but it is the intention, precedent, or newness of an engineer working in the field. Depending on the emergence of various technologies. In certain cases, there are terms arbitrarily selected by the applicant. In that case, the meaning is described in detail in the explanation part of the invention. Therefore, the terms used in the present invention must be defined based on the meanings of the terms, not the simple term names, and the contents of the present invention in general.

  Throughout the specification, when a part “includes” a component, it means that it does not exclude other components but further includes other components unless specifically stated otherwise. Means. In addition, terms such as “... Unit” and “module” described in the specification mean a unit for processing at least one function or operation, which is realized by hardware or software, or hardware. It may be realized by combining software and software.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments of the present invention. However, the present invention is embodied in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention in the drawings, portions not related to the description are omitted, and similar portions are denoted by similar reference numerals throughout the specification.

  FIG. 1 is a diagram for explaining a configuration of a container file according to an embodiment of the present invention.

  Referring to FIG. 1, a plurality of component files constituting a content can be recorded and provided in one file 100. In the present invention, one file 100 is referred to as a container file. The container file 100 is also composed of two parts, and includes a data box 120 including a plurality of component files 121 and 122 constituting content, and a meta box 110 for recording meta information related to the component files 121 and 122. That is it.

  In the meta box 110, characteristic information related to each component file recorded in the data box 120 is recorded as meta information 111 and 112. In addition, characteristics common to a plurality of component files may be recorded in the meta box 110. The content providing apparatus that reconstructs and provides the content arranges the component file of the content in the data box 120 using the input characteristic information. The content reproduction apparatus can classify the characteristics of the component file using the characteristic information recorded in the meta box 110, and can process the reproduction and loading of the component file differently according to the characteristics. For example, when a component file is recorded in the data box 120, if the component file having the same or similar characteristics is provided in a continuous position in time or space, the container file 120 may be a heterogeneous file system. Even if they are copied or moved, it is ensured that the positions of the component files having the same or similar characteristics in time or space are continuous, so that reproduction and loading are performed efficiently.

  FIG. 2 is a diagram for explaining meta information according to an embodiment of the present invention.

  Referring to FIGS. 1 and 2, the meta information 200 related to the component file includes a logical position 220 in the original content of the component file, a physical position 230 in the data box 120 included in the container file 100, May be included. The logical position in the content refers to an address where the component file is located in the content composed of a plurality of component files. For example, 01000. recorded in the directory / root / BDMV / CLIPINF / of a Blu-ray disc. If a component file called clpi is placed in a container file according to the present invention, 01000. The logical location of clpi is / root / BDMV / CLIPINF / 01000. It becomes clpi. The physical position in the data box 120 may be expressed by an offset value indicating the position where the component file is recorded in the container file. For example, / root / BDMV / CLIPINF / 01000. When clpi is recorded from a position about 0x0100 away from the start position or reference position of the data box 120, the physical position 230 recorded in the meta information 200 is 0x0100. The physical position 230 may record size information and address range of the component file. For example, the physical location of the component file is expressed as “e: \ content_container.ndf, item_ID = 1000, extent_entry # 0 = 0x0100 to 0x1100”, and the name of the container file in which the component file is recorded is content_container.ndf The item identifier is 1000, and the extent constituting the item is interpreted to mean that it is recorded in the address range 0x0100 to 0x1100 of the data box.

  The meta information 200 may include characteristic information 240 of the component file. A plurality of component files constituting the input content are arranged in the data box 110 according to the characteristic information 240 related thereto.

  The meta information 200 may additionally include an identifier 210 for identifying the component file. The specific meta information 200 among the plurality of meta information can be identified by the identifier 210. According to another embodiment of the present invention, the identifier 210 is not used separately, and the logical location 220 of the component file can be used as the identifier.

  FIG. 3 illustrates a file system configuration on a Blu-ray disc according to an embodiment of the present invention.

  Referring to FIG. 3, the original content of the Blu-ray disc is recorded in a plurality of directories and component files in the root directory 300. bdmv 310, MovieObject. bdmv 311 000000. mpls 312,00001. mpls 313, 00002. mpls 314, 01000. Contains component files such as clpi 315. The content providing apparatus according to an embodiment of the present invention reconstructs the original content, creates a single container file, and provides the container file. The component file included in the original content is recorded in the data box 120 of the container file, and the position where each component file is arranged is determined by the inputted characteristic information.

  FIG. 4 is a diagram for explaining the relationship between meta information and component files according to an embodiment of the present invention.

  Referring to FIG. 4, the component file 01000. The physical location of clpi 420 is determined to be 0x0100 and recorded at that location, 01000. It can be seen that the meta information 410 corresponding to the clpi 420 includes information indicating the physical position. As described above, all the component files illustrated in FIG. 3 are recorded in the data box 120, and meta information related to each is generated and recorded in the meta box 110.

  FIG. 5 is a view for explaining meta information according to another embodiment of the present invention.

  4 and 5, the component file 01000. item_ID 510 which is an identifier called meta information 410 related to clpi 420, route information corresponding to a position in the content / root / BDMV / CLIPINF / 1000. It may include clpi 520, 0x0100 which is offset information indicating the position in the data box 120, and characteristic information 540 indicating that the file has multiple access characteristics.

  According to an embodiment of the present invention, in order to effectively provide content on a medium with a low loading speed, a suitable characteristic value is assigned according to the characteristics of the component files that make up the content, and playback is performed according to the characteristic value. Let the device read the component file from the container file. On the other hand, as in the above-described embodiment, the component file may be provided by being physically inserted into the container file, but may be provided by being inserted logically without being actually inserted. That is, the corresponding meta information may be embodied to indicate a component file in an external container file. The component file is managed by being divided into at least one extent. In this case, characteristic information may be separately provided for the entire extent or a partial extent of the component file. The playback device reads the characteristic information related to each extent and performs a reading operation, loading operation or playback operation suitable for the extent.

  The characteristic information of the component file is determined when the playback device cannot predict by the user's selection of the menu, background image, bitmap font, font, etc., depending on the type and / or access pattern of the component file, that is, This is a component file that can be accessed at least once by the playback device, such as “random access characteristics” indicating that access to the component file occurs at any time, menu, background image, bitmap font, font, etc. “Multiple access characteristics”, which indicates that, in the case of component file consumption, the possibility of re-access after a single access is low, or the size of the component file is It is a component file that needs to be read in advance and immediately responded to user requests for the purpose of "disposable consumption characteristics" indicating that it is significantly larger than component files with characteristics, and improving user experience. It may include at least one of “preloading characteristics” indicating the above.

  However, the characteristic information of the component file is not limited to them, and if this is a necessary characteristic for processing in a predetermined method for efficient reproduction, it becomes characteristic information of the present invention. . For example, if a component file transmitted from a medium that is difficult to access a part of the medium is unreadable due to an external factor, if the component file is provided with characteristic information indicating that it can be skipped It is possible to control to play the next component file without interrupting playback.

  The characteristic information of the extents constituting the component file can indicate the mutual relationship between the extents. For example, due to the mutual importance of extents, a “reference characteristic” indicating that the contents of a part or the whole of the extent are referred to by other extents. At least one of “required characteristics” indicating that it is essential for reproduction or execution, and “duplicate characteristics” indicating that the contents of a part or all of the extent can be replaced with the contents of another extent. One may be included.

  FIG. 6 is a diagram for explaining the configuration of a container file according to another embodiment of the present invention. In this embodiment, a method of extending the ISOFF (ISO / IEC 14496-12 ISO base media File Format) format to implement a container file and characteristic information is described. However, it is obvious to those skilled in the art that the container file and the characteristic information can be implemented using other formats and other languages.

  The FTYP box 610 is for designating a file type, and a brand name indicating that the file is a container file according to the present invention may be recorded. If the brand name of the FTYP box has a predetermined value, it can be recognized that the container file according to the present invention is stored. That is, when the FTYP box has a predetermined value, the playback device according to the present invention can play back the container file.

  The META box 630 within the ISOFF MOOV box 620 may include an ILOC box 640, an IINF box 650, an INFE box 660, an FDEL box 670, and an ICHA box 680.

  The ILOC box 640 includes identification information (item_ID) of a component file physically or logically inserted into the container file, a position (Offset) indicating where the bit string fragment of the component file is in the container file, It is used to express the size (Size) of the bit string fragment. One component file is stored in a container file as one continuous bit string or several consecutive bit strings separated by a predetermined criterion. The ILOC box 640 provides information related to a unit of an item (item) mapped to one component file or several component files, and the item is composed of one extent or a plurality of extents which are continuous bit strings. Is done. The ILOC box 640 can describe the position and size of each extent on the container file. Further, the ILOC box 640 may include the number of extents (extent_count) included in the item. In the container file according to the embodiment of FIG. 6, the items in the ILOC box 640 are mapped to one component file, the storage position of the continuous bit string corresponding to all or part of the component file in the container file, and the size of each continuous bit string. Sato is expressed using extents.

  The IINF box 650 is used to include the name (item_name) of the component file mapped to the item and the FDEL box 670. The FDEL box 670 is used to include path information in the original content that is the logical address (content_location) of the component file.

  The ICHA box 680 is for describing the characteristic information about each item of the ILOC box 640 describing the position and size of the extent of the component file, and the characteristic information of the extent included in each item.

  The MDAT box 601 is a data box and is a space in which the component file 602 is recorded.

  FIG. 7 is a diagram for explaining characteristic information according to an embodiment of the present invention, and is an example of implementing characteristic information of a component file using an ISOFF ICHA box. 6 and 7, the ICHA box 680 provides the items described in the ILOC box 640 and characteristic information related to all or part of the extent of each item.

  item_count 710 indicates the number of items described in the ICHA box 680. item_ID 711 indicates item_ID defined in the ILOC box 680.

  Immediate_access_flag 712 relates to the “random access characteristic” of the component file corresponding to the item, and indicates whether or not an access to the component file occurs at a time when the playback device cannot predict. When the value of immediate_access_flag 712 is 1, it indicates that there is a random access characteristic, and when the value is 0, the random access characteristic cannot be known.

  The multiple_access_flag 713 is related to “multiple access characteristics” and indicates whether or not it is obvious that the access to the component file occurs once or more. When the value of multiple_access_flag 713 is 1, it indicates that there is a multiple access characteristic, and when the value is 0, the multiple access characteristic cannot be known.

  The disposable_access_flag 714 relates to “disposable consumption characteristics”, and indicates whether or not the component file is accessed only once and the possibility of re-access is low. When the value of disposable_access_flag 714 is 1, it indicates that there is a disposable consumption characteristic, and when the value is 0, it is impossible to know the disposable consumption characteristic.

  The preloading_access_flag 715 relates to the “preloading characteristic” and indicates whether or not at least a part of the content of the component file needs to be loaded in advance in the memory. When the value of preloading_access_flag 715 is 1, it indicates that if a part or all of the component file is read in advance, the reproduction efficiency is improved. When the value is 0, the preloading characteristic can be known. Can not. In the case of content recorded on a Blu-ray disc, an example of preloading characteristics is chapter jump. When moving from one chapter to the next chapter or the previous chapter according to a user request, a response delay occurs because the reading unit is physically moved. If the length of data that takes the time required for moving the reading section from the start position of each chapter displayed as having “preloading characteristics” is read in advance before the start of playback, the chapter jump of the user Gain for response delay due to request occurs.

  entry_count 757 indicates the number of extents described in the ICHA box 680. The extent_index 751 indicates the extent_index described in the ILOC box 640, and is information that can identify an extent. If entry_count 757 and extent_index 751 are used, it is possible to describe only the characteristic information related to a part of the extent instead of describing the characteristic information related to all extents corresponding to the predetermined item.

  The dependency_flag 752 relates to the “reference characteristic” and indicates whether or not the extent is referred to by another extent. When the value of dependency_flag 752 is 1, it is displayed that the extent has a reference characteristic, and when the value is 0, the reference characteristic cannot be known. For example, in the case of a video component file, extents corresponding to I-Frame, P-Frame, I-Slice, and P-Slice are referred to by other extents, and thus are set as extents having “reference characteristics”. .

  The necessity_flag 753 relates to “essential characteristics” and indicates whether or not at least a part of the contents of the extent is essential for reproduction or execution of another extent. When the value of necessity_flag 753 is 1, it is displayed that there is an essential characteristic. When the value is 0, it is impossible to know the essential characteristic. For example, in the case of a video component file, extents corresponding to GOP (group of picture) information and AU boundary information (boundary information) are essential for playback or execution of other extents, and thus have “essential characteristics”. It is set as an extent.

  The redundant_flag 754 relates to “redundancy characteristics”, and indicates whether at least a part of the contents of the extent is replaced with the contents of another extent. When the value of redundant_flag 754 is 1, it indicates that there is a redundant characteristic, and when the value is 0, it is impossible to know the redundant characteristic. For example, in the case of a video component file, an extent corresponding to B-Frame or B-Slice may be set as an extent having “overlapping characteristics” because part of the content is replaced with another extent.

  The dependency_counter 756 indicates the number of next extents affected by the existence of the extent when the value of the dependency_flag 752 or the necessity_flag 753 is 1. When the value of dependency_counter 756 is 0, the number of affected extents cannot be known.

  FIG. 8 is a diagram for explaining characteristic information according to another embodiment of the present invention, and is an example in which only characteristic information for each extent constituting each component file is included.

  Referring to FIGS. 6 and 8, item_count 810 indicates the number of items described in the ICHA box 680. In the embodiment in which component files and items correspond one-on-one, item_count 810 is the same as the number of component files constituting the content. item_ID 811 indicates item_ID described in the ILOC box 640.

  entry_count 850 indicates the number of extents described in the ICHA box 680. extent_index 851 indicates an index related to the extent.

  Immediate_access_flag 852 relates to “random access characteristics”, and indicates whether or not the extent has characteristics that are accessed when the playback device cannot predict. If the value of immediate_access_flag 852 is 1, it indicates that it has random access characteristics, and if the value is 0, it cannot be determined whether it has random access characteristics.

  The multiple_access_flag 853 relates to “multiple access characteristics” and indicates whether or not it is obvious that the extent is accessed one or more times by the playback device. When the value of multiple_access_flag 853 is 1, it indicates that it has multiple access characteristics, and when the value is 0, it cannot be known whether or not it has multiple access characteristics.

  The disposable_access_flag 854 relates to “multiple access characteristics”, and indicates whether or not the extent has a low possibility of reaccess after one access. When the value of disposable_access_flag 854 is 1, it indicates that it has a disposable consumption characteristic, and when the value is 0, it cannot be known whether it has a disposable consumption characteristic.

  preloading_access_flag 856 relates to “preloading characteristics” and indicates whether or not the extent needs to be read in advance. If the value of preloading_access_flag 856 is 1, it indicates that there is a preloading characteristic, and if the value is 0, it cannot be known whether it has the preloading characteristic.

  The dependency_flag 857 relates to “reference characteristics” and indicates whether at least a part of the contents of the extent is referred to by another extent. If the value of dependency_flag 857 is 1, it indicates that there is a reference characteristic, and if the value is 0, it cannot be determined whether there is a reference characteristic.

  The necessity_flag 858 relates to “essential characteristics” and indicates whether or not the contents of at least a part of the extent are indispensable for reproduction or execution of another extent. When the value of necessity_flag 858 is 1, it is displayed that there is an essential characteristic, and when the value is 0, it cannot be known whether or not it has the essential characteristic.

  The redundant_flag 859 relates to “redundancy characteristics” and indicates whether at least a part of the contents of the extent can be replaced with another extent. If the value of redundant_flag 859 is 1, it indicates that there is a redundant characteristic and is replaced with another extent. If the value is 0, the redundant characteristic cannot be known.

  The dependency_counter 860 indicates the number of next extents affected by the existence of the extent when the value of the dependency_flag or the necessity_flag is 1. When the value of dependency_counter is 0, the number of affected extents cannot be known.

  According to another embodiment of the present invention, among items in the ILOC box 640, an item_ID having a reserved value, for example, an item having a value having an item_ID of 0 is the entire container file or the entire MDAT box 601. Used to describe properties. In that case, when reading the container file, the playback apparatus reads the characteristic information corresponding to the item whose item_ID is 0 first, and can grasp the characteristic value related to the entire container file or the entire MDAT box 601.

  FIG. 9 is a block diagram for explaining a content providing apparatus according to an embodiment of the present invention.

  The content providing apparatus 900 may be implemented by a computer apparatus including an input unit 910, a control unit 920, and a storage unit 930. The input unit 910 is for acquiring content and characteristic information. The input unit 910 receives characteristic information on a component file that constitutes content from a pickup device for reading data from a recording medium such as an optical disk or a user or a content creator. At least one of a user interface for receiving content and a communication unit for receiving content and characteristic information from an external server. The input content may be composed of a plurality of component files, and the characteristic information may include characteristic information related to each component file and / or characteristic information of extents constituting each component file.

  The control unit 920 can generate a data box in which a plurality of component files are arranged based on the characteristic information, and can generate a meta box including information related to data recorded in the data box. The information included in the meta box may include information related to positions in the contents of the plurality of component files, positions in the data box, and characteristic information. The control unit 920 generates one container file including a data box and a meta box, and stores it in the storage unit 930.

  When the data box is generated, the control unit 920 can arrange component files having the same or similar characteristics in consecutive positions in the data box according to the characteristic information. At this time, the characteristic information may include information indicating an access pattern when reproducing a plurality of component files. The access pattern is also information indicating at least one of random access, multiple access, disposable access, and preload. When generating a container file, the control unit 920 arranges component files having the same characteristics at consecutive positions in a bit string according to the characteristic information, and performs a reading unit (mechanical pick-up, header, etc.) of the playback device. Thus, the physical addressing or the physical addressing can be minimized, and the section can be read through sequential reading. For example, the control unit 920 records component files having multiple access characteristics at consecutive positions in the data box. During playback, these component files are frequently used, but are recorded at successive positions, so that access time is shortened and efficient playback is possible.

  The characteristic information is defined for each extent constituting the component file, and the extent characteristic information is also information indicating a mutual relation characteristic between extents. For example, the information indicating the characteristics of the extent is whether or not a certain extent is referenced when reproducing another extent, whether or not the extent is essential for reproduction of another extent, It may indicate at least one of whether at least a part of the extent can be replaced by another extent. On the other hand, the control unit 920 can prepare for a situation where the entire contents cannot be reproduced when a copy book of the meta box is recorded in the container file and the original meta box is damaged.

  When determining the file name of the container file, the control unit 920 can use the file name indicating the component file characteristic information and / or the extent characteristic information. Specifically, the file name of the container file is determined so as to indicate what kind of component file is recorded in at least one of the plurality of sections constituting the data box. This is to provide information related to the size of the section and the characteristics of the component file or extent recorded in the section through the name of the container file. The characteristics of the section used in the file name can be expressed by combining a separate identifier and the section size, or the meaning of the section size in the enumeration order can be defined as a promise between the content provider and the playback device. it can.

  For example, i100_d20000. When a container file name of ndf is provided, the space for data having random access characteristics is 100 bytes from the start of the container file, and the space for data having disposable consumption characteristics is 20,000 bytes. Can mean that.

  As another example, 100_100. When the container file name ndf is provided, 100 bytes from the start of the container file is a space for data having random access characteristics, and the section from the end to 100 bytes before also has random access characteristics. It can also be defined and used in advance as a space for data.

  On the other hand, when it is determined that there is a plurality of pieces of section information having the same characteristics according to the file name, the playback apparatus causes the sections having the same characteristics to perform different processes. Can be set. For example, in system resource allocation, a better resource is assigned to a previously presented section, and a worse resource is assigned to a later presented section. Specifically, i100_i300. When the container file name ndf is provided, the playback device loads the first 100-byte section into a RAM (random access memory) and records the next 300-byte section in an HDD (hard disk drive), Or by not recording at all, the process distinguished by the display order of an area can be performed.

  When providing characteristic information of a section via a file name, after reading a part of the container file and determining a section for performing a separate process, a method of reading a data section for performing a separate process; When comparing, there is an improvement effect that the reproduction operation can be performed efficiently and a continuous access flow is shown.

  FIG. 10 is a flowchart for explaining a content providing method according to an embodiment of the present invention.

  Referring to FIGS. 9 and 10, a plurality of component files constituting the content are acquired (S1010). The content may be obtained from a medium with a slow loading speed such as a Blu-ray disc. Also, characteristic information relating to a plurality of component files is acquired (S1010). The characteristic information may be determined by the content creator and received via the user interface. A data box in which a plurality of component files are arranged is generated based on the characteristic information (S1012). A meta box is generated that includes information related to positions in the contents of a plurality of component files and positions in the data box, and the characteristic information (S1014). The information regarding the position in the content of the plurality of component files and the position in the data box includes the position of the component file in the original content and the component file in the data box generated by reconstructing the content according to the present invention. This is mapping information for mapping a position. One container file is generated by recording the data box and the meta box in one container file (S1016). The generated container file is stored in the storage unit 930 of the content providing apparatus 900 or is recorded on a separate recording medium (not shown) and provided to the user.

  FIG. 11 is a block diagram for explaining a content reproduction apparatus according to an embodiment of the present invention.

  The content reproduction apparatus 1100 may include a reading unit 1110, a control unit 1120, and a reproduction unit 1130. The reading unit 1110 reads a container file from a local storage unit (not shown) of the playback apparatus 1100, an attachable / detachable information recording medium (not shown), or an external server (not shown) via a network. Is for. The container file is a data box in which a plurality of component files are arranged according to characteristic information related to a plurality of component files constituting the content; a position in the contents of the plurality of component files; , A meta box including characteristic information related to a plurality of component files. When the container file is recorded on the information recording medium, the reading unit 1110 first reads the information included in the meta box from the information recording medium.

  The control unit 1120 refers to the information in the read metabox and controls the reading unit 1110 to read the data recorded in the data box. The control unit 1120 controls the metabox information and the data read from the data box. This is for controlling the playback unit 1130 to play back the content. The playback unit 1130 may include a decoder (not shown) for playing back multimedia content.

  The control unit 1120 reads a component file having characteristic information indicating random access or multiple access and data corresponding to an extent from the information recording medium, and loads the data onto another information recording medium having a higher loading speed than the information recording medium. Thus, it is possible to shorten the access time to a component file or extent that is frequently used at an arbitrary time or to perform efficient reproduction. Examples of information recording media having a relatively high loading speed include RAM, flash memory, SSD (solid state drive), hard disk, external storage device, external server, etc., but are not limited thereto. It is self-evident that a storage device is used. Whether or not the required data corresponds to a component file or extent recorded on an information recording medium with a fast loading speed due to the characteristics described in the meta box before accessing the required data during content playback. If the data is recorded on an information recording medium having a high loading speed, the data is read by the information recording medium. In that case, after reading the content component file list, the control unit 1120 has a logical address (for example, a route in the content recorded on the optical disc) and a physical address (for example, the content is It is necessary to manage by concatenating the location of the component file or extent on the container file reconstructed and recorded, the address of the component file or extent loaded in the RAM, and the like.

  The control unit 1120 can read in advance a predetermined portion of data corresponding to a component file or extent having a preloading characteristic and store it in a memory having a high loading speed. The control unit 1120 refers to information regarding the position in the content of the component file recorded in the meta box and the position in the data box, and maps the path in the content of each component file to the address in the data box. can do.

  The characteristic information is also defined for each extent constituting the component file, and in this case, the characteristic information may include information indicating a mutual relation characteristic between a plurality of extents. The control unit 1120 can control the playback unit 1130 so as to play back a plurality of extents with reference to the mutual relationship characteristics between the plurality of extents. The information indicating the extent characteristics includes whether or not the extent is referenced during playback of another extent, whether or not the extent is essential for playback of another extent, At least a part can indicate at least one of whether or not it can be replaced by another extent. The control unit 1120 reads the extent again when an extent that is referred to during playback of another extent or an extent that is essential for playback of another extent cannot be read from the information recording medium. Or the extent can be received from an external device. On the other hand, when the control unit 1120 cannot read from the information recording medium an extent that can be replaced by another extent, the control unit 1120 refers to the other extent instead of the extent and reproduces the extent section. In addition, the playback unit 1130 can be controlled.

  FIG. 12 is a flowchart for explaining a content reproduction method according to an embodiment of the present invention.

  First, the characteristic information and the mapping information are read from the meta box included in the container file (S1210). The data recorded in the data box of the container file is read with reference to the read information of the metabox (S1212). The characteristic information determines when to read the component file and extent, and the loading position in the memory, refers to the mapping information, and what path does the component file recorded in the data box have in the original content? Can be determined. The content is reproduced using the information in the meta box and the data read from the data box (S1214).

  FIG. 13 is a diagram for explaining a component file copied to the RAM of the content reproduction apparatus according to another embodiment of the present invention.

  The playback device 1300 may include a central processing unit (CPU) 1320, a decoder 1330, a reading unit 1340 for reading data from the disk 1360, a local storage 1350, and a RAM 1310 having a relatively high loading speed. The CPU 1320 can shorten the access time when copying and reproducing the entire component file or a partial extent constituting the component file to the RAM 1310 according to the characteristic information. Referring to FIG. 13, 01000. A component file 1311 called clpi has been copied. The physical location of clpi is / dev / RAM / 0x3000 to 0x4000. The reproduction apparatus 1300 reads the content / component / file list from the container file on the disk 1360, and then reads the logical address indicating the position in the original content and the component file on the disk 1360, which is a medium having a low loading speed. It is possible to determine where to read necessary data during playback by concatenating and managing the extent position of the component file or the extent position of the component file in the RAM 1310 which is a medium having a high loading speed. .

  FIG. 14 illustrates the correlation between extents and playback time according to an embodiment of the present invention.

  When playing content recorded in a container file that is transmitted via a medium that is difficult to access a part of the medium due to external factors, the characteristic information given to the content component file is used as follows: . When reading a partial extent constituting a component file fails during playback, the playback apparatus can make the following determination according to the characteristics of the extent.

  If the reference property of the extent is 1, it means that there is another extent that refers to the extent, and if the extent does not exist or is damaged, the quality of the decoding result is affected. . If the essential characteristic of an extent is 1, it means that there is a problem in reproducing other extents when there is no such extent. Therefore, when the reading of the extent having the reference characteristic of 1 or the essential characteristic of 1 fails, the reproducing apparatus reads again or reads the extent from the external source. At this time, the playback apparatus can determine the number of readings again and the request / waiting time for the external source according to the magnitude of the value of dependency_counter.

  If the extent overlap property is 1, it is determined that there is no need to retry or request an external source without the extent. When the extent cannot be read, the playback device can continue playback by playing back the extent section using another extent or by skipping the extent and playing the next extent. .

  Referring to FIG. 14, even if reading of an extent 1420 having a duplication characteristic of 1 fails, the playback time of the previous extent 1410 and the playback time of the next extent 1430 are based on the extent 1420. It is desirable to match the entire playback time of extents 1410, 1420, and 1430. That means that even when the extent 1420 is not read, the playback time of the next extent 1430 that has been read needs to be synchronously played back in accordance with the original playback time of the content. Due to such synchronous playback, in the playback section of the extent 1420 that has not been read, the last frame (k + 1) of the previous extent 1410 is maintained, or the frame (k + 1) and the frame (k + 4) of the next extent 1430 are maintained. Based on this video, you can create and use an intermediate video.

  FIG. 15 is a diagram for explaining metabox backup information according to an embodiment of the present invention.

  In the container file, the meta box contains not only basic information such as the name and path related to the component file but also various characteristic information, so if it is difficult to access the part of the medium on which the container file is recorded, There is a problem that the entire container file cannot be used. To solve such a problem, a copy book of the metabox can be inserted into the container file.

  FIG. 15 illustrates an example in which a MEBO box as backup information is described when a copy book related to an ISOFF format META box is added to a container file. Number_of_metadata_backup 1510 indicating the number of copy books and each copy Offset 1520 indicating the position of the book. Since the original META box 630 is located at the front of the container file, the copy book is provided behind the container file, and a MEBO box that informs the size of the META box is also included behind the container file. This is because when the original and copy book of the META box are recorded in a nearby position, there is a high possibility that both the original and copy book will be damaged.

  FIG. 16 is a diagram for explaining a container file including a MEBO box according to an embodiment of the present invention. The MEBO box 1610 includes information related to copy books 1620 and 1630 of the META box.

  Referring to FIG. 16, two offset information recorded in the MEBO box 1610 (Offset 1 and Offset 2 are a copy of the META box at a byte offset with respect to the last byte of the container file. The MEBO box 1610 can be located at the end of the container file, and the playback device refers to the information in the MEBO box 1610 when reading of the META box 630 fails. It is possible to know where the copy book 1620, 1630 of the META box exists in the container file.

  The method according to an embodiment of the present invention is implemented in the form of program instructions executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc., alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention or may be known and usable by those skilled in the computer software art. Examples of computer-readable recording media include magnetic media such as hard disks, prop- lic discs and magnetic tape; light such as compact disc (CD) -read only memory (ROM) and digital versatile disc (DVD). Specially designed to store and execute program instructions such as optical media; magneto-optical media such as floptical disks; and ROM, RAM, and flash memory. A hardware device configured as described above. Examples of program instructions include not only machine language code created by a compiler but also high-level language code executed by a computer using an interpreter or the like.

  The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and those skilled in the art using the basic concept of the present invention defined in the claims. Many variations and modifications are within the scope of the present invention.

100 container file 110 meta box 111 meta information 112 meta information 120 data box 121 component file 122 component file 200 meta information 210 identifier 220 logical position 230 physical position 240 characteristic information 300 root directory 310 index. bdmv
311 MovieObject. bdmv
312 00000. mpls
313 00001. mpls
314 00002. mpls
315 01000. clpi
410 Meta information 420 Component file 01000. clpi
510 item_ID
520 / root / BDMV / CLIPINF / 01000. clpi
540 Characteristic Information 601 FTYP Box 602 Component File 610 FTYP Box 620 MOOV Box 630 META Box 640 ILOC Box 650 IINF Box 660 INFE Box 670 FDEL Box 680 ICHA Box 710 item_count
711 item_ID
712 immediate_access_flag
713 multiple_access_flag
714 disposable_access_flag
715 preloading_access_flag
751 extent_index
752 dependency_flag
753 necessity_flag
754 redundant_flag
756 dependency_counter
757 entry_count
810 item_count
811 item_ID
850 entry_count
851 extent_index
852 immediate_access_flag
853 multiple_access_flag
854 disposable_access_flag
856 preloading_access_flag
857 dependency_flag
858 necessity_flag
859 redundant_flag
860 dependency_counter
900 Content providing apparatus 910 Input unit 920 Control unit 930 Storage unit 1100 0x0100 to 0x
1110 Reading unit 1120 Control unit 1130 Reproducing unit 1300 Reproducing device 1310 RAM
1311 Component file 1320 CPU
1330 Decoder 1340 Reading unit 1350 Local storage 1360 Disk 1410 Extent 1420 Extent 1430 Extent 1510 number_of_metadata_backup
1520 offset
1610 MEBO box 1620 Copy book of META box 1630 Copy book of META box

Claims (14)

Including one container file, the container file being
A data box in which a plurality of component files constituting the content are arranged;
A meta box that includes information related to positions in the contents of the plurality of component files and positions in the data box, and characteristic information of the plurality of component files,
The plurality of component files are arranged in the data box according to the characteristic information ,
An information recording medium in which component files having the same or similar characteristics are recorded at successive positions in the data box according to the characteristic information. The information recording medium according to claim 1, wherein the characteristic information includes information indicating an access pattern during reproduction of the plurality of component files. The information recording medium according to claim 2 , wherein the access pattern indicates at least one of random access, multiple access, disposable access, and preload. The information recording medium according to claim 2 , wherein the characteristic information further includes information indicating characteristics of a plurality of extents constituting the component file. The information recording medium according to claim 4 , wherein the information indicating the characteristics of the extent indicates a mutual relationship between the plurality of extents. The information recording medium according to claim 1, wherein the container file further includes a copy book of the metabox. The information recording medium according to claim 1, wherein the container file has a file name indicating the characteristic information. The file name of the container file indicates what kind of characteristic component file is recorded in at least one of a plurality of sections constituting the data box. Information recording medium. In the content provision method,
Acquiring multiple component files that make up the content;
Obtaining characteristic information relating to the plurality of component files;
Generating a data box in which the plurality of component files are arranged according to the characteristic information;
Generating a meta box including information on the position of the plurality of component files in the content and the position in the data box, and the characteristic information;
Generating a single container file containing the data box and the meta box, only including,
A component file having the same or similar characteristics according to the characteristic information is recorded at successive positions in the data box . In the content playback method,
A data box in which the plurality of component files are arranged according to characteristic information related to a plurality of component files constituting the content; a position in the content of the plurality of component files; and information related to a position in the data box; Reading information contained in the meta box from an information recording medium containing one container file in which a meta box containing characteristic information relating to the plurality of component files is recorded;
Referring to the information in the metabox and reading the data recorded in the data box;
And information of the meta box, by utilizing the data read from said data box, seen including a the steps of reproducing the content,
A component file having the same or similar characteristics according to the characteristic information is recorded at successive positions in the data box . In the content providing device,
An input unit for acquiring a plurality of component files constituting the content and characteristic information related to the plurality of component files;
A data box in which the plurality of component files are arranged is generated according to the characteristic information, and includes information regarding positions of the plurality of component files in the content and positions in the data box, and the characteristic information. A control unit for generating a meta box and generating one container file including the data box and the meta box;
Look including a, a storage unit for storing the generated container file,
An apparatus according to claim 1, wherein component files having the same or similar characteristics are recorded at successive positions in the data box according to the characteristic information . In the content playback device,
A data box in which the plurality of component files are arranged according to characteristic information related to a plurality of component files constituting the content; a position in the content of the plurality of component files; and information related to a position in the data box; A reading unit for reading information contained in the meta box from an information recording medium including one container file in which is recorded a meta box including characteristic information related to the plurality of component files;
A playback unit for playing back the content;
With reference to the information in the metabox, the reading unit is controlled to read the data recorded in the data box, and the information in the metabox and the data read from the data box are used. to play the content, looking contains a control unit for controlling the reproduction unit,
The apparatus according to claim 1, wherein component files having the same or similar characteristics are recorded in consecutive positions in the data box according to the characteristic information . In a computer-readable recording medium in which a program for implementing the content providing method is recorded, the content providing method includes:
In the content provision method,
Acquiring multiple component files that make up the content;
Obtaining characteristic information relating to the plurality of component files;
Generating a data box in which the plurality of component files are arranged according to the characteristic information;
Generating a meta box including information on the position of the plurality of component files in the content and the position in the data box, and the characteristic information;
Generating a single container file containing the data box and the meta box, only including,
A recording medium , wherein component files having the same or similar characteristics are recorded at consecutive positions in the data box according to the characteristic information . In a computer-readable recording medium in which a program for embodying a content reproduction method is recorded, the content reproduction method includes:
A data box in which the plurality of component files are arranged according to characteristic information related to a plurality of component files constituting the content; a position in the content of the plurality of component files; and information related to a position in the data box; Reading information contained in the meta box from an information recording medium containing one container file in which a meta box containing characteristic information relating to the plurality of component files is recorded;
Referring to the information in the metabox and reading the data recorded in the data box;
And information of the meta box, by utilizing the data read from said data box, seen including a the steps of reproducing the content,
A recording medium , wherein component files having the same or similar characteristics are recorded at consecutive positions in the data box according to the characteristic information .

Images