KR100443176B1 - An XSLT-Based Method and Apparatus for Implementing Dynamic Update of TeM Metadata - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a TME metadata update apparatus based on external information language transformation and a TIM metadata dynamic update method using the same.

2. The technical problem to be solved by the invention

The present invention is based on the TeM metadata by the input and output control of the appearance information language conversion (XSLT) tool without the addition of a module by using the appearance information language conversion (XSLT) tool mounted in the user terminal for display of metadata. To provide a TMM metadata update device based on the appearance information language conversion, and a TMM metadata dynamic update method using the same, and a computer-readable recording medium recording a program for realizing the method. There is a purpose.

3. Summary of the Solution of the Invention

The present invention, in the metadata update device, generates an initial description tree (IDT) by interpreting the decoder initialization information (DI) received from the server for transmitting the metadata for the multimedia content, the access unit received from the server XSL creating means for interpreting (AU) and converting the document into at least one external information language (XSL) document; XSL storage means for holding and storing the XSL document converted by the XSL creating means in order; Initial description tree (IDT) storage means for storing an initial description tree (IDT) generated by the XSL creation means; And initializing the current description tree (CDT) maintained in the terminal by using the initial description tree (IDT) generated by the XSL creating means, and then, according to the XSL document received from the XSL storage means. Includes external information language translation (XSLT) means for dynamically updating.

4. Important uses of the invention

The present invention is used for the metadata update device and the like.

Description

Timing metadata updating apparatus based on appearance information language transformation and animating method for updating metadata using same {An XSLT-Based Method and Apparatus for Implementing Dynamic Update of TeM Metadata}

The present invention provides a TIM metadata update apparatus based on an external information language transformation for dynamically updating metadata based on an eXtensible Markup Language (XML) in various multimedia application environments, and a TMM metadata dynamic update method using the same. And a computer-readable recording medium having recorded thereon a program for realizing the method, and more particularly, by using an external information language conversion (XSLT) tool mounted on a user terminal for displaying metadata. Appearance information language conversion-based Time metadata updating apparatus for dynamically updating TeM metadata by input / output control of the appearance information language conversion (XSLT) tool without adding a module of TIM metadata dynamic update method using the same And a program for realizing the above method. A recording medium that can be read by a computer.

Recently, metadata standards (MPEG-7), MPEG-21 (TV-Anytime), and TV-Anytime for describing various information on multimedia contents have been newly defined. These standards are intended to provide a variety of user-oriented multimedia services, such as searching and browsing multimedia.

In particular, the Final Draft International Standard (FDIS) standard of the international standard "ISO / IEC 15938-1" defines TeM (Textual format for MPEG-7 description streams) as one of the standard formats for transmitting metadata about multimedia content. The TeM (Textual format for MPEG-7 description streams) standard is an international standard (ISO / IEC 15938-1) for transmitting information about multimedia content in a text format. That is, the metadata of the TeM format is divided into multiple fragments at the multimedia content provider and transmitted to the user terminal, and the metadata fragmented at the user terminal is combined. The purpose of defining the TeM specification is to make it possible to transmit metadata more flexibly and to dynamically update certain portions of metadata that are already transmitted to the user terminal for timeliness of the metadata. The TeM standard has two types of information (DI) and metadata access unit (AU) for initialization of the decoder. Among them, the metadata access unit (AU) is a payload (FUPayload) for fragments of divided metadata. And simple header information such as "<FUCommand>" and "<FUContext>" is added thereto.

Meanwhile, "ISO / IEC 15938-6" provides reference software to confirm implementation and feasibility of the TeM (Textual format for MPEG-7 description streams) standard. In addition to the Reference Software provided by "-6", the "MPEG-7 TeM decoder developed at Lancaster University, (version LUv1-1), (ISO / IEC JTC 1) proposed by" RJ Lopes "in December 2001. / SC 29 / WG 11 MPEG Pattaya Conference) has implemented dynamic update of TeM metadata in a way that is independent of the reference software. Here, dynamic update of TeM metadata means that the metadata This means dynamically updating and combining certain parts.

However, the above schemes require a module that is designed for dynamic update of TeM metadata, which is expensive and has a problem of limited expression.

The present invention has been proposed to solve the above problems, by using an external information language conversion (XSLT) tool mounted in the user terminal for the display of metadata, the external information language without adding a separate module Apparatus for updating TEM metadata based on appearance information language conversion, TeM metadata dynamic update method using the same, and a program for realizing the method for dynamically updating TeM metadata by the input / output control of the transformation (XSLT) tool. The purpose is to provide a computer-readable recording medium having recorded thereon.

That is, the present invention is based on the appearance information language conversion that can be easily implemented using the existing appearance information language conversion (XSLT) tool in implementing the specification related to dynamic update of TeM metadata defined in ISO / IEC 15938-1. It is an object of the present invention to provide a TMM metadata updating apparatus, a TMM metadata dynamic update method using the same, and a computer-readable recording medium having recorded thereon a program for realizing the method.

1 is a configuration diagram of an embodiment of TeM metadata update apparatus based on appearance information language transformation according to the present invention.

FIG. 2 is an exemplary structural diagram of a TeM metadata standard according to ISO / IEC 15938-1 Final Draft International Standard. FIG.

3 is an explanatory diagram of a template for converting and storing decoder initialization information (DI) into an XSL file according to an embodiment of the present invention;

4 is an explanatory diagram for a template for converting a Fragment UpdateUnit (FUU) whose <FUCommand> is an addFragment in an Access Unit (AU) according to an embodiment of the present invention into an XSL file.

FIG. 5 is an explanatory diagram for a template for converting a partial update unit (FUU) in which an <FUCommand> in an access unit (AU) is replaceFragment, to an XSL file; FIG.

FIG. 6 is an explanatory diagram for a template for converting a partial update unit (FUU) in which an <FUCommand> in an access unit (AU) is deleteFragment, to an XSL file; FIG.

FIG. 7 is an explanatory diagram for a template for converting a partial update unit (FUU) whose <FUCommand> in the access unit (AU) is reset according to an embodiment of the present invention to an XSL file; FIG.

8 is a flowchart illustrating a method of dynamically updating a TeM metadata based on an appearance information language transformation according to the present invention.

* Explanation of symbols for the main parts of the drawings

101: XSL creation unit 102: XSL queue

103: initial description tree (IDT) storage unit 104: XSLT engine

In order to achieve the above object, the apparatus of the present invention, in the metadata update apparatus, generates an initial description tree (IDT) by interpreting decoder initialization information (DI) transmitted from a server for transmitting metadata for multimedia content. XSL writing means for interpreting the access unit (AU) received from the server and converting into at least one external information language (XSL) document; XSL storage means for holding and storing the XSL document converted by the XSL creating means in order; Initial description tree (IDT) storage means for storing an initial description tree (IDT) generated by the XSL creation means; And initializing the current description tree (CDT) maintained in the terminal by using the initial description tree (IDT) generated by the XSL creating means, and then, according to the XSL document received from the XSL storage means. An external information language conversion (XSLT) means for dynamically updating.

On the other hand, the method of the present invention, in the TME metadata dynamic update method based on the appearance information language conversion, the data received from the server by analyzing the decoder initialization information (DI) or access unit (AU) received from the server A data type determination step of determining the type of the data; As a result of the data type determination, if the data transmitted from the server is decoder initialization information (DI), initial description tree (IDT) information is extracted to generate an initial description tree, and then an IDT storage unit. An initial description tree storage step of storing the current description tree and initializing the current description tree (DCT); An XSL document storage step of sequentially converting the data received from the server into an eXtensible Markup Language (XSL) document and sequentially storing the data in an XSL storage unit if the data received from the server is an access unit (AU); And a dynamic update of the current description tree which receives the XSL document from the XSL storage unit in order and dynamically updates the current description tree.

Meanwhile, the present invention analyzes decoder initialization information (DI) or access unit (AU) transmitted from a server to a TEM metadata updating device having a processor for dynamic updating of TME metadata. A data type determination function for determining a type of data received from the server; As a result of the data type determination, if the data transmitted from the server is decoder initialization information (DI), initial description tree (IDT) information is extracted to generate an initial description tree, and then an IDT storage unit. An initial description tree storage function for storing in the current description tree and initializing the current description tree (DCT); An XSL document storage function of converting the data from the server into an eXtensible Markup Language (XSL) document and sequentially storing the data in an XSL storage unit if the data received from the server is an access unit (AU); And a computer-readable recording medium having recorded thereon a program for realizing a current technology tree dynamic update function of receiving an XSL document sequentially from the XSL storage part and dynamically updating the current technology tree.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an TeM metadata update apparatus based on appearance information language transformation according to the present invention.

As shown in FIG. 1, the TeM metadata update apparatus based on the appearance information language transformation according to the present invention analyzes decoder initialization information DI received from a server and generates an Initial Description Tree (IDT). And an XSL generator 101 for interpreting an access unit (AU) received from the server and converting the access unit into one or more eXtensible Stylesheet Language (XSL) documents. XSL queue 102 for maintaining and storing two XSL documents in order, and IDT for storing an Initial Description Tree (IDT) received from the XSL creator 101 in an arbitrary form. ) Initializes the current description tree (CDT) using the storage unit 103 and the initial description tree (IDT) generated by the XSL generator 101, and then sequentially stores the XSL documents from the XSL queue 102. Take the input accordingly It includes the XSLT (XSL Transformations) engine 104 for updating the material technology tree (CDT).

FIG. 2 is a structural diagram of one embodiment of a TeM metadata standard according to ISO / IEC 15938-1 Final Draft International Standard.

FIG. 3 is an explanatory diagram for a template for converting and decoding decoder initialization information (DI) into an XSL file according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram for a template for converting a FragmentUpdateUnit (FUU) whose <FUCommand> is an addFragment in an Access Unit (AU) according to an embodiment of the present invention into an XSL file.

FIG. 5 is an explanatory diagram for a template for converting a partial update unit (FUU) in which an <FUCommand> in a access unit (AU) is replaceFragment, to an XSL file.

FIG. 6 is an explanatory diagram for a template for converting a partial update unit (FUU) in which <FUCommand> in an access unit (AU) is deleteFragment, to an XSL file.

FIG. 7 is an explanatory diagram for a template for converting a partial update unit (FUU) whose <FUCommand> is reset in an access unit (AU) according to an embodiment of the present invention to an XSL file.

2 to 7 will be described in detail TIM metadata update apparatus based on the appearance information language conversion and metadata dynamic update method using the same according to the present invention.

First, the XSL preparation unit 101 analyzes the decoder initialization information (DI) received from the server, generates an Initial Description Tree (IDT), and analyzes the access unit (AU) received from the server. Convert to one or more eXtensible Stylesheet Language (XSL) documents. That is, metadata transmitted from a server according to the "ISO / IEC 15938-1" Final Draft International Standard specification shown in FIG. The decoder initialization information (DI) packet among the packets is internally defined so as to include an initial description tree (IDT) in the <FUPayload> of the <InitialDescription>. The tree IDT is stored in the storage unit 103. In an exemplary embodiment, when storing IDT information in the IDT storage unit 103, an XSL file named "init.xsl" in accordance with a template as shown in FIG. Save in form. Specifically, a description part corresponding to the initial description tree (IDT) is allocated to an XSL variable called "initial_description_tree" and stored in the initial description tree (IDT) storage unit 103. At this time, the initial description tree (IDT) generated by the XSL generator 101 is provided as an initial value of the current description tree (CDT) managed by the XSLT engine 104, the XSLT engine 104 is the initial description tree With the initial value of (IDT), the current description tree (CDT) is dynamically updated according to the XSL document received through the XSL queue 102.

Meanwhile, as shown in FIG. 2, an access unit (AU) packet among metadata packets transmitted from a server internally includes one or more partial update units (FUUs), and each partial update unit (FUU) is a terminal. It is a unit for updating the current description tree (CDT) of the and includes <FUCommand>, <FUContext> and <FUPayload>.

<FUCommand> is a command to update the current description tree (CDT). There are four types.

First, as "addFragment", a node corresponding to <FUContext> of the corresponding partial update unit (FUU) is found in the current description tree (CDT), and a description part corresponding to <FUPayload> is inserted as its child node. At this time, the inserted position is to be the end as a child node.

Second, as a "replaceFragment", the node corresponding to the <FUContext> of the partial update unit (FUU) is found in the current description tree (CDT), and the node is replaced by the description part corresponding to the <FUPayload>.

Third, as the "deleteFragment", the node corresponding to the <FUContext> of the corresponding partial update unit (FUU) is found in the current description tree (CDT), and the description below is deleted. A partial update unit (FUU) whose value of <FUCommand> is "deleteFragment" does not include <FUPayload>.

Fourth, as "reset", replaces all of the contents of the current description tree (CDT) with the initial description tree (IDT) previously transmitted through the decoder initialization information (DI) packet.

The XSL generator 101 interprets each <FUCommand> for each partial update unit (FUU) in the access unit (AU) packet, and if the value is "addFragment", "replaceFragment", "deleteFragment", or "reset", respectively. The document is converted into an XSL document according to a template as shown in FIGS. 4 to 7 and stored in the XSL queue 102 in order. The template for processing each partial update unit (FUU) shown in FIGS. 4 through 7 is a format for an XSL file for executing the above-described <FUCommand> instruction through the XSLT engine 104.

The XSL queue 102 maintains and stores one or more XSL documents converted by the XSL creator 101 in the order in which the corresponding partial update units (FUUs) are present in the access unit (AU) packets. 104) is inputted along with the current description tree (CDT) in order to update the current description tree (CDT). At this time, the current description tree (CDT) input to the XSLT engine 104 is the output of itself (XSLT engine 104) in the previous step. At this time, the XSL queue 102 is the XSL creating unit 101. ) Maintains the converted XSL document in order, and maintains the timing related information consistently for the converted XSL document when timing related information is assigned to each access unit (AU) sent from the server. do. In addition, the XSL queue 102 updates the current description tree (CDT) by sequentially applying the appearance information language conversion (XSLT) process to the XSL document that has reached the update execution time according to the timing information of the XSL document.

The initial description tree (IDT) storage unit 103 is a module for storing initial description tree (IDT) information received from the XSL generator 101. In the exemplary embodiment as described above, this is stored as an XSL document called "init.xsl", which means that the XSL document inputted from the XSL queue 102 to the XSLT engine 104 is converted into a "reset" template as shown in FIG. If so, it is loaded together and serves to replace the current description tree (CDT) with the initial description tree (IDT). That is, if the XSL document received from the XSL queue 102 is a "reset" template, the XSLT engine 104 stores an initial description tree (CDT) stored in the initial description tree (IDT) storage 103. IDT).

The XSLT engine 104 is a module that implements XSLT, which is one of the Recommendation Specification of the World Wide Web Consortium (W3C), and can use an existing commercial tool.

That is, the XSLT engine 104 is intended to combine a data document in the original XML (eXtensible Markup Language) format with an XSL document that defines a display style to be visualized in various forms on any user terminal. The present invention intends to utilize the XSLT engine 104 in updating the current description tree (CDT) in view of the fact that the current description tree (CDT) is a valid XML document, and the current description tree (the output of the XSLT engine 104). The CDT) is fed back to the input of the XSLT, and each XSL document stored through the XSL queue 102 is sequentially input to the XSLT engine 104 to update the current description tree (CDT). That is, in the present invention, in updating the current description tree (CDT) held in the terminal, the current description tree (CDT), which is the output of the user (the external information language conversion means), is fed back to itself (the external information). Language conversion (XSLT) means. The overall operation of the present invention will be described in detail with reference to FIG.

8 is a flowchart illustrating a method of dynamically updating a TeM metadata based on an external information language transformation according to the present invention.

First, the XSL generator 101 analyzes the decoder initialization information DI or the access unit AU received from the server (801), and determines whether the information received from the server is the decoder initialization information (802).

In the determination result 802, if the decoder is initialization information, initial description tree (IDT) information is extracted and stored in the initial description tree (IDT) storage unit 103 in an arbitrary form (803). AU) is converted into the corresponding XSL (eXtensible Markup Language) document according to the type and stored in the XSL queue 102 in order (804). At this time, the initial description tree (IDT) stored in the initial description tree (IDT) storage unit 103 is provided as an initial value of the current description tree (CDT) managed by the XSLT engine 104, the XSLT engine 104 With the initial description tree (IDT) as an initial value, the current description tree (CDT) is dynamically updated according to the XSL document received through the XSL queue 102.

Then, the XSL engine 104 receives each XSL document in order from the XSL queue 102 and updates the current description tree (CDT) accordingly (805).

If the XSL document inputted from the XSL queue 102 to the XSLT engine 104 is a "reset" template as shown in FIG. 7, the XSLT engine 104 adds an IDT to the XSL document. Load together to replace the current technology tree (CDT).

Notable in the XSLT-based TeM metadata update apparatus and the dynamic update method of metadata using the same according to the present invention described above, converting each decoder initialization information (DI) and access unit (AU) packet to an XSL document. The XSL generator 101 may also be easily implemented using the XSLT engine 104. As shown in FIG. 2, the process of converting the decoder initialization information (DI) and access unit (AU) packets according to a certain format into the XSL document shown in FIGS. This is because it can be treated as an application process. In this case, the dynamic update process of the TeM metadata can be implemented only by input / output control without the need for an additional module other than the XSLT tool that is held in the terminal for the purpose of displaying the XML document.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention can be easily implemented by using an existing external information language conversion (XSLT) tool in implementing a dynamic update related specification of TeM metadata defined in ISO / IEC 15938-1. In particular, when the terminal is equipped with the XSLT for the display of the metadata, there is an effect that can implement the dynamic update process of the TeM metadata only by the input and output control without additionally sharing a separate module.

Claims (14)

In the metadata update device, Interpret the decoder initialization information (DI) received from the server to transmit the metadata for the multimedia content to generate an initial description tree (IDT), and interpret the access unit (AU) received from the server at least one appearance information XSL creating means for converting to a language (XSL) document; XSL storage means for holding and storing the XSL document converted by the XSL creating means in order; Initial description tree (IDT) storage means for storing an initial description tree (IDT) generated by the XSL creation means; And After initializing the current description tree (CDT) maintained in the terminal by using the initial description tree (IDT) generated by the XSL creating means, the dynamic description of the current description tree (CDT) according to the XSL document received from the XSL storage means. Information Language Transformation (XSLT) means for updating with code Appearance information language conversion based TME metadata updating apparatus comprising a. delete The method of claim 2, The XSL creation means, Appearance information language conversion based TME metadata update device, characterized in that divided into each partial update unit (FUU) FragmentUpdateUnit (FUU) received from the server into a separate XSL document. The method of claim 1, The XSL storage means, The XSL document converted by the XSL creating means is maintained in order, and when timing related information is allocated to each access unit (AU) transmitted from the server, the timing related information is consistent with respect to the converted XSL document. Appearance information language conversion based TME metadata updating apparatus, characterized in that the management to maintain. The method of claim 1, The XSL storage means, Appearance information language conversion based TME metadata updating apparatus, characterized in that for generating the IDT information in the form of XSL document. The method of claim 5, wherein The external information language conversion means (XSLT) means, The initial description tree (IDT) information, As the XSL document received from the XSL storage unit is a "reset" template, the current description tree (CDT) is replaced with an initial description tree (IDT) stored in the initial description tree (IDT) storage. TME metadata update apparatus based on information language transformation. The method according to any one of claims 1 to 6, The external information language conversion means (XSLT) means, In updating the current description tree (CDT) maintained in the terminal, the current description tree (CDS) which is the output of the self (the external information language conversion (XSLT) means) is fed back to itself (the external information language conversion (XSLT)). TM metadata updating apparatus based on the external language information conversion, characterized in that the input to the means. The method of claim 7, wherein The external information language conversion means (XSLT) means, Appearance information language conversion, characterized in that to update the current description tree (CDT) by sequentially applying the appearance information language conversion (XSLT) process to the XSL document that is the update execution time in accordance with the timing information maintained in the XSL storage means TME metadata update device based. In the TME metadata dynamic update method based on appearance information language conversion, A data type determination step of analyzing the decoder initialization information (DI) or the access unit (AU) received from the server to determine the type of data received from the server; As a result of the data type determination, if the data transmitted from the server is decoder initialization information (DI), initial description tree (IDT) information is extracted to generate an initial description tree, and then an IDT storage unit. An initial description tree storage step of storing the current description tree and initializing the current description tree (DCT); An XSL document storage step of sequentially converting the data received from the server into an eXtensible Markup Language (XSL) document and sequentially storing the data in an XSL storage unit if the data received from the server is an access unit (AU); And Dynamic update of the current description tree for dynamically updating the current description tree by receiving the XSL document in order from the XSL storage unit TMM metadata dynamic update method based on the appearance information language conversion, including. The method of claim 9, The XSL document storage step, The access unit (AU) received from the server is divided into each update unit (FUU: FragmentUpdateUnit) and individually converted to an XSL document, and the converted XSL document is maintained in order and stored, but each access unit transmitted from the server Timing metadata dynamic update method based on appearance information language conversion, wherein the timing related information is managed to be consistently maintained even in the converted XSL document when timing related information is assigned to (AU). The method of claim 9, Initial description tree information stored in an initial description tree (IDT) storage unit in the initial description tree storage step, A TME metadata dynamic update method based on an external information language transformation characterized by being present in an XSL document in the form of an XSL variable. The method of claim 9, The current technology tree dynamic update step, As the XSL document received from the XSL storage unit is a "reset" template, the current description tree (CDT) is replaced with an initial description tree (IDT) stored in the initial description tree (IDT) storage. A method of dynamically updating TME metadata based on information language transformation. The method according to any one of claims 9 to 12, The appearance information language conversion (XSLT) engine, Appearance information language conversion, characterized in that to update the current description tree (CDT) by sequentially applying the appearance information language conversion (XSLT) process to the XSL document that is the update execution time in accordance with the timing information maintained in the XSL storage unit Based on TME metadata dynamic update method. In order to dynamically update the TME metadata, the TEM metadata updating apparatus having a processor, A data type determination function for analyzing the decoder initialization information DI or the access unit AU received from the server to determine the type of data received from the server; As a result of the data type determination, if the data transmitted from the server is decoder initialization information (DI), initial description tree (IDT) information is extracted to generate an initial description tree, and then an IDT storage unit. An initial description tree storage function for storing in the current description tree and initializing the current description tree (DCT); An XSL document storage function of converting the data from the server into an eXtensible Markup Language (XSL) document and sequentially storing the data in an XSL storage unit if the data received from the server is an access unit (AU); And Current technology tree dynamic update function that dynamically updates the current technology tree by receiving XSL documents in order from the XSL storage unit A computer-readable recording medium having recorded thereon a program for realizing this.