KR20050015070A - Broadcasting program transmitting and receiving device and method for the same for - Google Patents

Abstract

PURPOSE: An apparatus for transmitting and receiving a broadcast program for content-based search and a method therefor are provided to search for a specific scene or shot without searching a whole broadcast program by including various information granting structural meaning in the broadcast program, thereby easily searching for and editing a desired image. CONSTITUTION: An XML(eXtensible Markup Language) converting unit(200) converts program contents information granting structural meaning to a whole broadcast program(100) into an XML form. A data transmitting unit(300) puts the converted program contents information, and audio data and video data of the broadcast program into MPEG(Moving Picture Experts Group)-2 stream for transmitting the MPEG-2 stream to the outside. A data receiving unit(400) separates the audio and video data from the transmitted MPEG-2 stream, and receives download of the program contents information for parsing the program contents information. A user search unit(500) formats a surface form of the parsed program contents information, and displays the formatted program contents information to the outside so that a user searches the broadcast program. A data output unit(600) synchronizes the audio data and video data corresponding to the selected program contents information.

Description

BROADCASTING PROGRAM TRANSMITTING AND RECEIVING DEVICE AND METHOD FOR THE SAME FOR}

The present invention relates to an apparatus and method for transmitting and receiving a broadcast program, and more particularly, a program converts and transmits program content information of a broadcast program into an XML form on a transmitting side and transmits the entire program through the program content information on a receiving side. The present invention relates to an apparatus and method for transmitting and receiving a broadcast program for content-based retrieval so that a desired image can be easily searched and edited without searching.

As shown in FIG. 1, the apparatus for transmitting / receiving a broadcast program according to the related art includes a content producing / synchronizing unit 2 for producing data to be synchronized of a program to be broadcast or a live broadcasting program in real time, and the content producing / synchronizing unit. A data transmitter 6 for combining the XML tag information output from (2) with a broadcast program and transmitting it together in the form of an MPEG-2 transport stream, and a broadcast program transmitted from the data transmitter 6 And a data receiver 8 for storing and reproducing the data, and interpreting the XML tag received in synchronization with a specific section through a data broadcasting pass, thereby reproducing information necessary for the video index by the user.

That is, the content production / synchronization unit 2 is a general MPEG decoder logic in consideration of the execution of a specific shot / scene as shown in FIG. 2, that is, a corresponding position to synchronize with the MPEG-2 transport stream. The GOP (GROUP OF PICTURE) is found, and the XML tag is set at the found position to mark.

Here, the XML tag indicates a corresponding tag synchronized with the MPEG-2 transport stream as an XML marker. The corresponding tag is a series of time sequences (SEQUENCE) as an offset of one frame or a GOP unit. In addition, the XML tag is a technique for receiving a textual content that can express the specific shot / scene in XML and expressing it in XML.

Accordingly, the data receiver 8 may interpret the XML tag and express the MPEG-2 transport stream through time information defined according to the XML tag as shown in FIG. 3. You will be able to search for shots / scenes for.

However, the broadcast program transmitting and receiving apparatus according to the conventional technique is characterized by the XML, which is a structural and semantic language, because the XML-oriented tags in the MPEG-2 transport stream are interpreted tag-oriented without a start declaration and end declaration. There is a problem with parsing a complete XML document and then grasping the meaning within the document, which violates the conditions for a well-formed document.

In addition, since the XML language is a structural and semantic language, it is possible to give a meaning that a broadcast program content can be delivered to a user and provide more specific information to the user based on this. Since the language is simply used for time synchronization, there is a problem in that it is impossible to search for meaningful contents, thereby hampering user convenience.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to include not only simple time information in program content information of a broadcast program, but also a variety of information giving structural meaning to the broadcast program. The present invention provides a broadcast program transmitting and receiving apparatus and method for content-based searching that can improve user convenience by searching for a scene / shot of a specific location without searching the entire program.

In addition, another object of the present invention is to meet the conditions of a well-formed XML document because the program content information that gives the structural meaning of the broadcast program is created through the XML language, which is a structural language for the broadcast program as a whole. The present invention provides an apparatus and method for transmitting and receiving broadcast programs for content-based retrieval.

In addition, another object of the present invention is that the program content information in the XML format can be used in both the MPEG-2 transport stream and the MPEG-2 program stream to enable a specific position search or recording of the broadcast program, and at the same time DVD The present invention provides a method for transmitting / receiving a broadcast program for content-based retrieval that can be used for retrieval, copying, and the like.

In order to achieve the above object, a broadcast program transmitting apparatus for content-based retrieval according to the present invention includes an XML conversion unit for converting program content information that can give structural meaning to an entire broadcast program into an XML form, and the XML conversion unit. And a data transmitter configured to transmit the program content information converted in the MPEG-2 stream together with the audio data and video data of the broadcast program and transmit the same to an MPEG-2 stream.

In addition, the apparatus for receiving broadcast programs for content-based retrieval according to the present invention comprises: a data receiver for separating audio data and video data from a multimedia stream transmitted from the outside, and downloading and parsing the program content information; A user search unit for formatting a representation method of the program content information parsed by the data receiving unit and displaying the same through a user interface so that a user can search for the broadcast program through the program content information; And a data output unit configured to synchronize and output audio data and video data corresponding to broadcast program information.

In addition, the broadcast program transmission method for content-based retrieval according to the present invention includes a first step of converting the program content information giving a structural meaning throughout the broadcast program into an XML form, and the program content information converted in the first step And a second step of transmitting to the outside together with the audio data and the video data of the broadcast program.

In addition, the method for receiving a broadcast program for content-based retrieval according to the present invention comprises the steps of parsing program content information while separating audio data and video data included in a multimedia stream from the outside, and parsing in the first step. Program content information is displayed externally through a user interface, and a second step of a user searching for the broadcast program through the program content information; and outputting by synchronizing video data and audio data corresponding to the selected program content information. This includes the third step.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4, the apparatus for transmitting and receiving a broadcast program for content-based retrieval according to the present invention includes XML containing program content information for giving structural meaning to the broadcast program 100 throughout the program 100. An XML converter 200 for converting the data into a form, and data for transmitting the program content information converted by the XML converter 200 and audio data and video data of the broadcast program 100 to the outside through an MPEG-2 stream. A data receiver 400 for separating the audio data and the video data from the MPEG-2 stream transmitted from the data transmitter 300 and downloading the program content information and parsing the program content information; And formatting a surface method of the program content information parsed by the data receiving unit 400 and formatting the formatted program. A user search unit 500 that allows content information to be displayed externally through a user interface so that a user can search for the broadcast program, and audio data and video corresponding to the broadcast program information selected by the user search unit 500. And a data output unit 600 for synchronizing and outputting data.

Here, the broadcast program 100 is divided into scenes or shot units, and when the broadcast program 100 is divided into scene units, as shown in FIG. 5, each scene represents an object OBJECT and the appearance object. The event object is divided into an event (EVENT) that describes the behavior of the event object, which is composed of an actor (ACTOR, ACTRESS) and the characteristics of the actor (PROPERTIES), and the event is the action of the character (ACTION) and the action. The program content information refers to the characters and events, actors, characteristics, actions, and places that give structural meaning to the broadcast program 100.

In addition, the program content information includes synchronization information consisting of a time or offset value that can be synchronized with the existing audio data and video data.

As described above, the program content information includes not only the existing time or offset value, but also various information on the characters and events, actors, characteristics, actions, and places that give structural meaning to the broadcast program 100. Searches for the broadcast program 100 through the various information.

That is, as shown in FIG. 6, when the broadcast program 100 is divided into scene units, the synchronization information may include a start time for each scene and a time value for a duration. Synchronization information such as offset value is included. In addition, as shown in FIG. 7, the start time (START) and the duration (DURATION) for the appearance objects OBJECT1, 2 and 3, the events EVENT1 and 2, and the audio AUDIO1 and 2 for each scene. It will contain synchronization information about.

The XML conversion unit 200 includes a program content information classifying unit 210 for classifying program content information giving a structural meaning of the broadcast program 100, and program contents classified by the program content information classifying unit 210. And an XML conversion tool 22 for converting information into an XML form, and the data transmitter 300 includes an audio encoder 310 and a video encoder 320 for encoding audio data and video data of the broadcast program 100. And a multiplexer 330 for putting the program content information and the encoded audio data and the video data converted by the XML converter 200 into an MPEG-2 stream to be transmitted to the outside via satellite, airwaves, and cables. do.

In this case, an embodiment of dividing the broadcast program 100 into scene units and converting program content information that gives structural meaning to each scene into an XML format is illustrated in FIG. 8, and an appearance object for each scene And events are described.

Here, in FIG. 8, although an object and an event for any one scene are described, the entire scene of the broadcast program 100 can be described, and thus, when a user searches for a broadcast program, the user can select a scene without searching the entire program. You will be able to search.

Here, the program content information may be transmitted together by the broadcast program 100 for each shot / scene or broadcast program 100, and the user may always receive the program content information to search for a broadcast program. You can save time.

FIG. 9 is a diagram illustrating a document type definition (DTD) defining a structure of program content information converted into XML. When the DTD is declared, the program content information converted into the XML format conforms to the DTD. Whether the root element is the name of the root element and whether the specific element has a specific attribute.

The data receiver 400 includes a separator 410 for separating the encoded audio data and video data and the converted program content information from the MPEG-2 stream transmitted from the data transmitter 300, and the encoded audio. An audio decoder 420 and a video decoder 430 capable of decoding data and video data to obtain audio data and video data of the broadcast program 100, and inversely converting the converted program content information to the program content information. XML processing unit 440 for interpreting the data, storage unit 450 for storing the program content information interpreted by the XML processing unit 440, and the program content information stored in the storage unit 450 when the user requests the request. The user request unit 460 allows the command to be transferred to the storage unit 450.

Here, the separating unit 410 is composed of a demultiplexer (DEMULTIPLEXER) for separating the encoded audio data and video data and the modified program content information from the MPEG-2 stream, the audio decoder 420 and the video decoder 430 is composed of an audio parser and a video parser, respectively.

In addition, the XML processing unit 440 may include a download unit 441 for downloading the program content information separated by the separator 410, and an XML parser 442 for interpreting the program content information downloaded from the download unit 441. And an operation unit 443 which calculates program content information interpreted by the XML parser 442 according to a corresponding process, and the operation unit 443 is configured to transmit the broadcast program 100 to the MPEG-2 stream. When the program map tape (PMT) or the event information table (EIT) is included, the program content information for the MPEG-2 stream is determined to be provided, and the download unit 441 may download the program content information. do.

The storage unit 450 includes a storage controller 451 to which the program content information processed by the operation unit 443 is transmitted, and a database 442 to store the program content information transferred to the storage controller 451. When the user's request command is transmitted to the storage controller 451 through the user request unit 460, the storage controller 451 extracts corresponding program content information from the database 452.

On the other hand, the user search unit 500 is formatted by the XSL processing unit 510 and the XSL processing unit 510 for formatting the presentation manner of the program content information downloaded from the download unit 441 of the XML processing unit 440. The user interface 520 is configured to allow a user to check the program content information, and the user interface 520 is composed of an application program such as an EPG (ELECTRIC PROGRAM GUIDE).

In addition, the user interface 520 may use a separate application program as described above, so that the program content information formatted by the XSL processor 510 is directly displayed so that a user may search for a broadcast program.

In this case, when the user requests previously stored program content information through the user interface 520, the request command is transmitted to the storage controller 451 through the user request unit 460, and the storage controller 451 The program content information corresponding to the request command is extracted from the database 452, and this can be confirmed through the user interface 520.

In addition, when a specific shot / scene is searched for the broadcast program through the program content information checked through the user interface 520, the operation unit 443 may synchronize the program content information with audio data and video data of the broadcast program. Synchronized to the unit 450 to be output through the signal output unit 460.

In this case, when the user searches for a broadcast program through program content information previously stored in the database 452, the data transmitter 300 sends video data and audio data of a broadcast program corresponding to the previously stored program content information. In case of requesting the request or when the corresponding broadcast program is recorded, it is synchronized with the pre-stored program content information through the recorded broadcast program.

The data output unit 600 synchronizes the program content information interpreted by the XML processor 440 with the decoded audio data and video data, and the synchronization unit 610 synchronizes each other. And a signal output unit 620 for outputting the audio and video data and the program content information.

Looking at the operation of the broadcast program transmitting and receiving device according to the present invention configured as described above are as follows.

In the broadcast program transmission and reception method according to the present invention, as shown in FIG. 10, first, audio data and video data of the broadcast program 100 are encoded by the audio encoder 310 and the video encoder 320 in a first step. At the same time, when the program content information for the entire broadcast program 100 is classified by the program content information classification unit 210, the program content information is converted into an XML form by the XML conversion tool 220. (See S1. )

In the second step, the audio and video data encoded in the first step and the converted program content information are inserted into the MPEG-2 stream by the multiplexer 330 and transmitted to the outside via satellite, airwaves, and cables. (See S2)

In the third step, the audio and video data and the program content information transmitted by the MPEG-2 stream transmitted in the second step are separated by the separating unit 410 (see S3).

In the fourth step, the audio data and the video data separated in the third step are decoded by the audio decoder 420 and the video decoder 430, and the program content information is downloaded from the download unit 441. The downloaded program content information is interpreted by the XML parser 442 (see S4).

In the fifth step, the audio data and video data decoded in the fourth step and the interpreted program content information are synchronized by the synchronization unit 610 (see S5).

In this case, the interpreted program content information is calculated according to a corresponding process by the operation unit 443 and transferred to the synchronization unit 610, and the audio data and video data and program content information synchronized by the synchronization unit 610. Is output through the signal output unit 620.

In addition, the program content information transmitted to be synchronized in the synchronization unit 610 is transferred to the storage unit 450 and stored in the database 452.

On the other hand, the program content information downloaded from the download unit 441 is formatted by the XSL processing unit 510 in the sixth step so that the user can check it (see S6).

In the seventh step, the program content information formatted in the sixth step is displayed to the outside through the user interface 520, so that the user searches for a broadcast program through the program content information (see S7).

Although the present invention has been described in detail above, those skilled in the art to which the present invention pertains may variously modify the present invention without departing from the spirit and scope of the present invention as defined in the appended claims. It is apparent that the present invention may be modified or modified. Therefore, a simple change according to an embodiment of the present invention will not be possible without departing from the technology of the present invention.

According to the present invention having the above-described configuration, the program content information includes not only time and offset information of a broadcast program, but also various information giving structural meaning of the broadcast program, and the program content information is included throughout the broadcast program. Since it is classified and converted into an XML form, a user can search for a specific shot / scene without searching the entire broadcast program through the program content information, thereby improving user convenience.

In addition, since the program content information is classified throughout the broadcast program and converted into an XML format, the program content information conforms to a standard of a well-formed XML document, thereby converting the program content information into an MPEG-2 transport stream. Since it can be used for MPEG-2 program streams, it can be used not only for searching and recording broadcast programs but also for searching and copying DVDs.

1 is a view showing a broadcast program transmitting and receiving device according to the prior art;

2 is a diagram illustrating an XML tag according to the prior art;

3 is a diagram illustrating an XML tag included in an MPEG-2 transport stream according to the prior art;

4 is a view showing a broadcast program transmission and reception apparatus for content-based searching according to the present invention;

5 is a diagram showing program content information of a broadcast program according to the present invention;

6 and 7 illustrate synchronization information of a broadcast program according to the present invention;

8 and 9 are diagrams in which program content information of a broadcast program for content-based retrieval according to the present invention is converted into an XML form;

10 illustrates a method of transmitting and receiving a broadcast program for content-based searching according to the present invention.

<Explanation of symbols on main parts of the drawings>

100: broadcast program 200: XML conversion unit

210: program content information classification unit 220: XML conversion tool

300: data transmission unit 310: audio encoder

320: video encoder 330: multiplexer

400: data receiving unit 410: separating unit

420: audio decoder 430: video decoder

440: XML processing unit 450: Synchronization unit

460: signal output unit 470: storage unit

480: user request unit 500: user search unit

510: XSL processing unit 520: user interface

600: data output unit 610: synchronization unit

620: signal output unit

Claims (17)

An XML conversion unit for converting program content information that can give structural meaning to the entire broadcast program into an XML form; And a data transmitter configured to transmit the program content information converted by the XML converter, audio data, and video data of the broadcast program into a multimedia stream to be transmitted to the outside. . The method of claim 1, The program content information may include an event object for giving structural meaning to each scene when the broadcast program is divided into scene units, an event depicting an action of the object, the program content information, audio data, and video data. And broadcast information for synchronizing the information with the broadcast program transmitting apparatus. The method of claim 1, The XML conversion unit program content information classification unit for classifying the program content information for the broadcast program; And an XML conversion tool for converting the content description information classified by the program content information classification unit into an XML form. The method of claim 1, The data transmitter includes an audio encoder and a video encoder for encoding audio data and video data of the broadcast program; And a multiplexer configured to transmit audio data and video data encoded by the audio encoder and the video encoder, and program content information converted by the XML converter to the outside through a multimedia stream. Broadcast program transmission device for. The method of claim 1, And the multimedia stream is an MPEG-2 transport stream or an MPEG-2 program stream. A data receiver which separates audio data and video data from a multimedia stream transmitted from the outside and simultaneously downloads and parses the program content information; A user search unit for formatting a representation method of the program content information parsed by the data receiving unit and displaying the same through a user interface so that a user can search for the broadcast program through the program content information; And a data output unit configured to synchronize and output audio data and video data corresponding to the broadcast program information selected by the user search unit. The method of claim 6, The program content information is based on content, characterized in that it comprises an event object that gives a structural meaning to each scene when the broadcast program is divided into scene units and an event depicting the behavior of the appearance object. Broadcast program receiving device for searching. The method of claim 6, The data receiver includes a storage unit for storing the parsed program content information. And a user request unit for extracting corresponding program content information from the storage unit when requesting program content information about a desired broadcast program through the user search unit. The method of claim 8, The data receiver comprises: a separator for separating the audio data, the video data, and the program content information from the multimedia stream transmitted from the data transmitter; An audio decoder and a video decoder for decoding the separated audio data and video data; And an XML parser for parsing the program content information of the XML format. The method of claim 6, The user search unit and the XSL processing unit for formatting the expression method of the program content information in the form of XML separated from the data receiving unit according to a specific format; And a user interface for allowing a user to check program content information formatted by the XSL processor and to search for a desired broadcast program. The method of claim 6, And the multimedia stream is an MPEG-2 transport stream or an MPEG-2 program stream. A first step of converting program content information giving structural meaning to an XML form throughout the broadcast program; And transmitting the program content information converted in the first step to the outside together with the audio data and the video data of the broadcast program. The method of claim 12, And said second step comprises encoding said audio data and video data to be transmitted. A first step of parsing program content information while separating audio data and video data included in the multimedia stream from the outside; A second step of allowing the program content information parsed in the first step to be displayed to the outside through a user interface, and a user searching for the broadcast program through the program content information; And a third step of synchronizing and outputting video data and audio data corresponding to the selected program content information. The method of claim 14, The program content information is based on content, characterized in that it comprises an event object that gives a structural meaning to each scene when the broadcast program is divided into scene units and an event depicting the behavior of the appearance object. Broadcast program receiving device for searching. The method of claim 14, The first step includes a first process of decoding the separated audio data and video data; And a second step of synchronizing the broadcast program according to the audio data and the video data decoded in the first step with the parsed program content information. The method of claim 16, In the second step, when the user requests previously stored program content information, the program content information is extracted from the program content information stored in the first step, and the extracted program content information is displayed through the user interface. Broadcast program receiving method comprising a.