KR20080004317A - Apparatus for receiving broadcasting signal and method for transmitting and receiving broadcasting signal - Google Patents

Abstract

An apparatus for receiving a broadcasting signal and a method for transceiving the broadcasting signal are provided to obtain broadcast program information accurately and conveniently and enable a user to check the summary information of a broadcast program through graphic information or sound information. An apparatus for receiving a broadcasting signal includes a broadcasting signal decoder(103), a program information decoder(120), a program information output engine(121) and a display unit(122). The broadcasting signal decoder decodes and outputs program information from a decoded digital multimedia broadcasting signal. The program information decoder decodes and outputs binary-encoded preview information which can display the summary information of a video program out of the program information. The program information output engine processes the program information outputted from the program information decoder into a screen output signal. The display unit displays preview information out of broadcast program information outputted from the program information output engine.

Description

Apparatus for receiving broadcasting signal and method for transmitting and receiving broadcasting signal}

1A illustrates an example of a hierarchical structure of a ServiceInformation element among elements of an EPG.

1B illustrates an example of a hierarchical structure of an epg element.

2 illustrates an example of an XML schema of a preview element.

FIG. 3 is a diagram illustrating a preview element information illustrated in FIG. 2 in a tree form in a schema.

4 illustrates a data structure of EPG information in XML format encoded in binary format.

5A illustrates an example of XML for binary encoding EPG information in an XML format.

FIG. 5B shows a binary value table that decodes the example of FIG. 5A

6 is a diagram illustrating encoding values of element tag information and higher elements of each element when binary encoding EPG information in XML format; FIG.

FIG. 7 illustrates encoding values of attribute information and attribute tags that each element may have when binary encoding EPG information in an XML format. FIG.

8 illustrates tag information of a preview element and an upper element;

9 is a diagram illustrating an encoding value capable of encoding tag information indicating an attribute of a preview element.

10 is a block diagram of an embodiment of a broadcast receiving apparatus according to the present invention.

11A and 11B illustrate an example in which a preview selection item is expressed in an EPG by a broadcast signal transmission / reception method according to the present invention.

12 is a block diagram showing an embodiment of a broadcast signal transmission method according to the present invention.

13 is a block diagram showing an embodiment of a broadcast signal receiving method according to the present invention.

<Description of Signs of Major Parts of Drawings>

101: tuner 102: demodulator

103: DAB decoder 104: first storage unit

105: first audio decoder 106: error correction decoder

107: MPEG-2 Demultiplexer 108: Second Audio Decoder

109: video decoder 110: object descriptor decoder

111: BIFS decoder 112: packet decoder

113: data group decoder 114: MOT decoder

115: binary EPG parser 116: XML EPG parser

120: program information decoder 121: program information output engine

122: expression unit 123: database

The present invention relates to a broadcast signal receiving apparatus and a broadcast signal transmitting and receiving method, and more particularly, to a broadcast signal receiving apparatus and a broadcast signal transmitting and receiving method capable of efficiently transmitting and receiving broadcast program information.

Various digital broadcasting transmission standards are being prepared by extending the transmission form of digital audio broadcasting.

Digital multimedia broadcasting may extend a transmission form of digital audio broadcasting to transmit a video broadcasting signal in a video compression format and a data broadcasting signal for various information.

Digital multimedia broadcasting includes broadcasting web site (BWS), text information using dynamic label segment (DLS), traffic information by transport protocol experts group (TPEG), and program information including electronic program guide (EPG). The service can be provided to the user.

Digital broadcasting such as the digital multimedia broadcasting described above may include program information in a broadcast signal and transmit the program information, and the viewer may obtain information about a program of each channel.

As an example of program information, the electronic program guide (EPG) may include time, genre information, and the like for each program.

However, since the electronic program guide of the conventional digital broadcasting mainly delivers the broadcast program in text format only, there is an inconvenience in that it cannot accurately deliver the broadcast program information.

When a conventional electronic program guide is transmitted, it can be transmitted and received in a coded binary form. However, since broadcast program information to be correctly transmitted is not defined, it is difficult to deliver accurate program information. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a broadcast signal receiving apparatus and a broadcast signal transmitting and receiving method for obtaining broadcast program information accurately and conveniently.

It is another object of the present invention to provide a broadcast signal receiving apparatus and a broadcast signal transmitting / receiving method for allowing a user to know a summary of a program as graphic information or audio information.

Another object of the present invention is to broadcast and transmit and receive the information of the graphic form or the information of the auditory form efficiently when encoding and transmitting the electronic program guide to deliver the information in the form of graphic or audio information The present invention provides a signal receiving apparatus and a broadcast signal transmitting / receiving method.

In order to achieve the above object, the present invention provides a broadcast signal decoder for decoding and outputting program information from a demodulated digital multimedia broadcasting signal; A program information decoder configured to decode and output binary coded preview information capable of expressing summary information of a program in a video form among the program information; A program information output engine for processing the program information output by the program information decoder into a screen output signal; And a display unit capable of expressing preview information among the broadcast program information output by the program information output engine.

 The preview information may be implemented by XML (eXtensible Markup Language).

The preview information in the video form may be included in an element having tag information binary encoded with a hexa value 0x34.

The preview information may include tag information of the preview element, length information of the preview element, and a data value of the preview element.

Tag information of the preview element may be binary encoded with a hexa value 0x37.

The preview information may include attribute information indicating the name of the preview information.

The preview information may include location information of a file resource of the preview information and file resource information of the preview information.

The location information of the file resource of the preview information may include tag information that is binary encoded with a hexa value of 0x80.

In another aspect, the present invention includes the steps of generating preview information in the form of a video containing a summary of a broadcast program; Binary encoding the preview information according to an element; Converting the program information including the binary coded preview information into a broadcast data format; And transmitting the converted broadcast data.

The element of the preview information may include tag information capable of identifying the preview element, length information of the preview element, and a data value of the preview element.

The data value of the preview element may include attribute tag information indicating a name of the preview information, location tag information of a file resource of the preview information, and a file resource of the preview information. It may include tag information.

In another aspect, the present invention includes the steps of receiving a broadcast signal including preview information in the form of a video containing a summary of the broadcast program; Decoding the broadcast signal to obtain binary coded preview information; Binary decoding the obtained preview information; And displaying the decoded preview information on a screen.

The element of the preview information may include tag information capable of identifying the preview element, length information of the preview element, and a data value of the preview element.

Tag information of the preview element may be binary encoded with a hexa value 0x37.

The data value of the preview element may include attribute tag information indicating a name of the preview information, location tag information of a file resource of the preview information, and a file resource tag of the preview information. (tag) May contain information.

The attribute tag information indicating the name of the preview information may be binary encoded with a hexa value 0x80.

The location tag information of the file resource of the preview information may be binary encoded with a hexa value 0x80.

The tag information of the file resource of the preview information may be binary encoded with a hexa value 0x81.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

In order to easily describe the present invention, an electronic program guide (hereinafter referred to as EPG) of digital multimedia broadcasting will be described as an example. However, the present invention is not necessarily limited to the term EPG. In the following description, the program information for viewing the summarized contents of the broadcast program as graphic information or audio information is called a preview.

In the present specification, the information in the form of a graphic includes a still image and a video. The EPG provides the program information according to the channel to the user and the program information so that the user can watch or record the program using the information. Accordingly, the EPG may include a channel, a program name, a broadcast time, and the like.

In general, the EPG is transmitted in the form of an encoded binary, and the EPG may be implemented by decoding the transmitted binary or may be implemented on the screen by implementing the transmitted binary information in XML (eXtensible Markup Language).

The EPG may have a structure including a plurality of elements. Hereinafter, an EPG implemented in XML will be described as an example in order to easily describe the element structure of the EPG.

The EPG may include service information containing broadcasting station and channel information and program information containing information related to program scheduling.

The EPG may include a ServiceInformation element as a top element of the service information, and an epig element as a top element of the program information.

1A is a diagram illustrating an example of a hierarchical structure of a ServiceInformation element among elements of an EPG. An example of a ServiceInformation element will be described with reference to FIG. 1A.

The numerals shown in each element block in FIG. 1A indicate the number of elements. For example, 0 ... * indicates that the element is zero or more, and 1 ... * indicates that the element is one or more.

ServiceInformation is used as a container for ensemble elements.

The ensemble element may include a frequency element including frequency information and a service element meaning individual broadcasting.

The ensemble element or service element may include a serviceNameGroup element, a media description element, a conditional access (CA) element, a keyword element, a link element, and the like.

The serviceNameGroup element may include a short name, a medium name, a long name, etc. for the ensemble.

The mediaDescription element may contain a description of the ensemble, and the CA element may include scramble information. Also, the keywords element and the link element may each include corresponding information.

In addition, the service element may include a service ID element that can distinguish the service, a genre element indicating the classification of the service, an epigLanguage element indicating the language of the service, and the like.

EPG data may be encoded in binary numbers and transmitted in a multimedia object transfer (MOT) protocol.

1B illustrates an example of a hierarchical structure of an epg element. The epg element will be briefly described with reference to FIG. 1B as follows.

The epg element may include a schedule element, a program element, a program group element, and an alternate source element.

The schedule element contains information about placing a program in a given time range. In addition, a scope element and a service scope element may be included below the scope element.

The programGroups element can be used to describe groupings of programs, events of programs in groups, and so on.

The alternateSource element indicates whether EPG information from another source can be received and used.

The programGroup element under the program and programGroups elements includes the scheduleNameGroup element, the mediaDescription element, the genre element, the keywords element, the memberOf element, the link element, etc. It may include.

The mediaDescription element of the enumerated elements may include a multimedia element so that multimedia information about a program can be transmitted.

 In one embodiment of the method for transmitting and receiving a broadcast signal according to the present invention, the EPG element includes a preview element for previewing a brief content of a program belonging to the transmitted program information in a graphic or audio form. can do.

Therefore, when the preview element is included in the EPG element, the user can select the preview item from the received and displayed broadcast screen to accurately and conveniently obtain information about the program.

2 is a diagram illustrating an example of an XML schema of an EPG for transmitting and receiving a preview element. Hereinafter, an embodiment of a broadcast signal transmission and reception method according to the present invention will be described with reference to FIG. 2.

A new type may be defined for the preview element, and FIG. 2 shows an example of defining a "previewType" that the preview element may have.

When the preview is displayed on the screen, the preview may be displayed on the screen in the form of a slide show or may be displayed on the screen in the form of a video clip in the form of a video.

In the example of FIG. 2, a preview of a slide show form of the preview is defined as a "slidePreview" element (A), and a preview of a video form is defined as a "videoPreview" element (B).

The "slidePreview" element defined as an example of a preview in the form of a slide show may include a plurality of image elements "a1".

Each image element may have the following attributes.

First, the "url" attribute is defined as urlType to indicate the location of a resource of program summary information in a graphic form and may be represented as a string representing an address or a protocol. That is, the "slidePreview" element may have location information where the resource of the preview is located as the "url" attribute.

The "mimeValue" attribute may indicate a resource of a file defined as mimeType, and the resource of the file may be represented by a string. That is, the "slidePreview" element may have resource information of the file for preview with the "mimeValue" attribute.

The "width" attribute indicates the width of the image to be previewed.

The "height" attribute represents the height of the image to be previewed.

The "slidePreview" element may have size information of an image expressed from a "width" attribute or a "height" attribute.

The "slidePreview" element may have an attribute for the presentation time interval of images that are presented as a slide show.

The "interval" attribute a2 may indicate an attribute representing a time interval in which the "image" element a1 is displayed.

In addition, a preview element in the form of a video may be defined in the attribute “previewType” of the preview element. FIG. 2 defines a “videoPreview” element B as an example of the preview element in the form of a video.

The "videoPreview" element may have the following attributes.

First, the "url" attribute is defined as urlType and may be represented as a string indicating an address or a protocol as a location of a resource of program summary information in a video form. That is, the "videoPreview" element may have location information where the resource of the preview is located as the "url" attribute.

The "mimeValue" attribute may indicate a resource of a file defined as mimeType, and the resource of the file may be represented by a string. Accordingly, the "videoPreview" element may have resource information of a file with an "mimeValue" attribute.

The "previewType" attribute of the preview element may have a "name" attribute that can be commonly applied to a slide show or a movie.

The "name" attribute illustrates an attribute representing the name of each slide show preview or video preview and may be represented by a string.

An embodiment of the broadcast signal transmission / reception method according to the present invention may be included and transmitted in an electronic program guide by using the example of the preview schema as shown in FIG. 2.

FIG. 3 is a diagram illustrating a preview element information illustrated in FIG. 2 in a tree form.

The "preview" element may have zero to infinity (0 ... ∞).

Each "preview" element may have a "slidePreview" or "videoPreview" element with a "name" attribute.

"slidePreview" may have an "image" element of 0 to infinity (0 ... ∞) according to the "interval" attribute.

The "image" element may have a "url" attribute, a "mimeValue" attribute, a "width" attribute, and a "height" attribute.

The "videoPreview" element may have a "url" attribute and a "mimeValue" attribute.

EPG information, which can be implemented in XML, can be encoded and transmitted in binary format when transmitting XML data because the amount of information to be transmitted is very large.

4 illustrates a data structure of EPG information in XML format encoded in binary format. Referring to FIG. 4, a data structure is described in the case of transmitting / receiving EPG information in XML format by encoding in a binary format as follows.

When encoding EPG information in XML format, binary encoding may include tag information, length information, and a data value.

When transmitting / receiving each element or attribute of the EPG, tag information which is identifier information for identifying the element or attribute, length information indicating the length of the data value, and data value may be encoded and transmitted, respectively.

5A to 5B show examples of XML for describing an example of binary encoding and transmitting EPG information in XML format and a table showing binary values for decoding the example.

In the example of FIG. 5A, EPG information transmitted and received is represented by an epg element (<epg>). The epg element contains a schedule element (<shedule>) (c1), and the schedule element (<shedule>) contains a scope element (<scope>) (c2) and a program element (<programme>) (c3). can do.

FIG. 5B is a table that can be referred to when decoding the EPG information of the XML format of FIG. 5A. The left column of the table represents encoded values in hexa-byte values in bytes, and the right column of the table represents descriptions of the respective encoded values.

For example, the tag information of the epg element may be encoded as 02 (d1). The length of the data value of the epg element is 63 bytes (d2). Therefore, the encoded value from the encoded value of the schedule element to the encoded value of the last line of the table in the table is a value listing the data values included in the epg element, and the length thereof is 63 bytes.

The tag information of the schedule element may be encoded as 21 (e1). The length of the data value of the schedule element is 61 bytes (e2). That is, the encoded value from the encoded value of the scope element to the encoded value of the last line of the table is a value listing data values included in the shedule element, and the length thereof is 61 bytes.

The startTime of the scope element can be encoded as 80 (f1), and the length is 4 bytes (f2). The startTime "2003-12-18 17:00:00" may be encoded as 33 BF C4 40 (f3).

In FIG. 5A, the schedule element includes a scope element (<scope>) and a program element (<programme>). The program element may be encoded by 1C (g1). 35 bytes may be allocated as the length information of the program element (g2).

As described above, when the EPG information of the XML format of FIG. 5A is encoded according to the table shown in FIG. 5B, the encoded information amount is smaller than the information amount before the encoding, so that the EPG information can be transmitted and received more efficiently than the transmission and reception of the EPG information by the XML data itself.

6 is an example of a table showing encoded values of element tag information and higher elements of each element when binary encoding EPG information in XML format.

For example, the tag information of the serviceInformation element among the elements included in the XML format EPG information may be encoded as 0x03, and the serviceInformation may be the top-level element (h1).

The mediaDescription element may be encoded as 0x13, and there may be programmeGroup, ensemble, service, programme, and programmeEvent as an upper element of mediaDescription (h2).

On the other hand, the serviceID element may be encoded as 0x29, and the service element may be a higher element (h2).

FIG. 7 illustrates a table illustrating encoding values of attribute information and attribute tag information that each element may have when binary encoding EPG information in an XML format.

Since the epg element is a system value rather than an attribute value, it is not encoded separately as an attribute value. For example, the version attribute information of programmeGroups may be encoded as 0x80 (i1), the attribute information of creation time is 0x81 (i2), and the attribute information of originator may be encoded as 0x82 (i3).

The id attribute information of programmeGroup is 0x80 (j1), the shortID attribute information is 0x81 (j2), the version attribute information is 0x82 (j3), the type attribute information is 0x83 (j4), and the numOfItem attribute information is 0x84 (j5). Each can be encoded.

Therefore, when EPG information is encoded and transmitted in XML format, EPG information can be efficiently transmitted and received.

FIG. 8 is a diagram illustrating a table of encoding values and higher elements thereof capable of encoding tag information of a preview element when binary encoding is performed by including a preview element in a video form in EPG information.

In the example of FIG. 8, the preview element representing the preview element may be a program element or a programmeEvent element. In addition, the tag information of the preview element may have a value of 0x34, for example (k1).

In addition, the videoPreview element representing a preview in the form of a video may have a preview element as its parent element. Tag information indicating a videoPreview element may be 0x37 (k2).

The tag information of the preview element or the tag information of the videoPreview element may have different values.

FIG. 9 is a table illustrating encoding values capable of encoding tag information indicating an attribute of a preview element in a table when binary encoding is performed by including a preview element in a video form in EPG information.

As an attribute that the preview element may have, tag information of a name attribute representing a name of a video preview may be encoded with a value of 0x80 (l1).

As an attribute that a videoPreview element may have, tag information of a url attribute indicating location information of a file resource of a video preview may be encoded with a value of 0x80 (l2). The data value of the url attribute may be encoded as a string.

In addition, tag information of a mimeValue attribute indicating a file resource of a video preview may be encoded to a value of 0x81 (l2). The data value of the mimeValue attribute can be encoded as a string.

The coded values exemplified above can be changed by a person skilled in the art, but the coded values exemplified above are one value that can provide compatibility with the existing method of binary encoding EPG information.

According to an embodiment of the method for transmitting and receiving a broadcast signal according to the present invention, an element of a video preview that can be expressed as a video among EPG information that can be expressed in XML format, and the attributes of the element as shown in the above example. Can transmit and receive. Therefore, when the video preview is included in the EPG information and transmitted, accurate and program information and efficient program information can be delivered and received.

10 is a block diagram showing an embodiment of a broadcast signal receiving apparatus according to the present invention. Referring to FIG. 10, an operation of an embodiment of a broadcast signal receiving apparatus according to the present invention will be described.

The tuner 101 may tune a signal corresponding to an ensemble among broadcast signals including program information, frequency convert the baseband, and output the baseband.

The demodulator 102 may demodulate and output the modulated signal according to the transmission method. The signal demodulated by the demodulator 102 may include a transmission frame including a synchronization channel, a fast information channel (FIC), and a main service channel (MSC).

As an example of the broadcast signal decoder, the DAB decoder 103 decodes the fast information channel (FIC) to extract ensemble information, service information, and virtual channel number assigned to the service information, which are multiplex configuration information (MCI). A channel map may be generated from the extracted information and stored in the first storage unit 104.

The DAB decoder 103 may decode the MSC to extract actual data. If the extracted data is an audio signal, the DAB decoder 103 may output the first audio decoder 105, and output the error correction decoder 106 if the extracted data is an audio signal.

The first audio decoder 105 may decode and output a compressed coded audio signal of a coding scheme such as masking pattern adapted universal sub-band integrated coding and multiplexing (MUSCAM).

The error correction decoder 106 may perform error correction on the data stream and output the result to the MPEG-2 demultiplexer 107.

The MPEG-2 demultiplexer 107 may depacketize a transport stream, which is an error-corrected data stream, and then perform a SL (Sync Layer) depacketizing operation to output the packet.

The output data may be divided into audio data, video data, object description, and binary format for scenes (BIFS) data. ) Can be output.

The decoders 108, 109, 110, and 111 may decode and output audio data, video data, object description, and binary format for scenes (BIFS) data in consideration of the format of each data. As an example, the second audio decoder 108 decodes the audio signal with a bit slice arithmetic coding (BSAC) decoding algorithm, and the video decoder 409 decodes the video signal with a H.264 decoding algorithm.

On the other hand, the data related to the program information is input to the program information decoder 120 by the MSC information decoded by the DAB decoder 103.

The program information decoder 120 may include a packet decoder 112, a data group decoder 113, a MOT decoder 114, a binary EPG decoder 115, and an XML EPG parser 116.

The packet decoder 112 may extract and output data transmitted by a transmission protocol in units of packets. The data group decoder 113 may group and output data output from the packet decoder 112.

The MOT decoder 113 may output the grouped data in a file format by a multimedia object transfer (MOT) algorithm.

 The binary EPG decoder 115 may generate an EPG file that may be implemented in XML by parsing the binary encoded EPG information.

In this case, the binary EPG decoder 115 may parse preview information in the form of a binary coded video. That is, the binary EPG decoder 115 may parse data values including tag information of the preview element, length information of the preview element, and attributes of the preview element, which may be implemented in a video form. have.

The binary EPG decoder 115 may generate an EPG file according to the property of the preview element that defines the preview element.

The XML EPG parser 116 may parse and output the generated EPG file in XML format. The program information output engine 121 may store the result parsed by the XML EPG parser 116 in the database 123 and process the result. The display unit 122 may output the EPG information stored or processed by the program information output engine on the screen.

Therefore, when the EPG information is displayed to the user and the user selects a preview item among the EPG information, the broadcast signal receiving apparatus according to the present invention may provide the user with a video file according to the attribute of the preview element.

According to an embodiment of the broadcast signal receiving apparatus according to the present invention, a user may accurately obtain program information through a preview in the form of a video.

11A and 11B are diagrams illustrating an example in which a preview selection item is expressed in an EPG by a broadcast signal transmission / reception method according to the present invention.

In the example of FIG. 11A, the EPG may display a preview selection item on the screen. If the user selects the "BB1" program that is broadcast from 19:00 to 20:30 on the B channel (indicated by a bold line), the preview selection for the "BB1" program is displayed in the EPG screen (Fig. 4A). In the bottom of the EPG).

When the user selects the preview selection item for the "BB1" program, the broadcast signal receiving apparatus may display an image summarizing the "BB1" program on the screen as shown in FIG. 11B.

If the program selected by the user does not include the preview selection item, unlike the example shown in FIG. 4B, the preview selection item may not be displayed on the screen.

11B illustrates that when the icon in the preview screen is selected, the preview video can be played back with 56k or 300k quality.

12 is a block diagram showing an embodiment of a broadcast signal transmission method according to the present invention. An embodiment of a broadcast signal transmission method according to the present invention will be described with reference to FIG. 12.

The preview information in the form of a video containing the summary contents of the broadcast program is generated (S10). Preview information is binary encoded according to an element (S20).

The program information including the binary coded preview information is converted into a broadcast data format (S30). The converted broadcast data is transmitted through a wired or wireless network (S40).

13 is a block diagram showing an embodiment of a broadcast signal receiving method according to the present invention. Referring to FIG. 13, an embodiment of a broadcast signal receiving method according to the present invention will be described.

A broadcast signal including preview information in the form of a video containing a summary of the broadcast program is received (S110). Binary coded preview information may be obtained by decoding the received broadcast signal (S120). Then, the obtained preview information is binary decoded and output (S130). The decoded preview information is displayed on the screen (S140).

Therefore, it is easy for a person skilled in the art to change or modify the present invention from the present specification. Therefore, although an embodiment of the present invention has been described above clearly, various modifications thereof should be made without departing from the spirit and the scope of the present invention.

The effects of the apparatus for receiving broadcast signals and the method for transmitting and receiving broadcast signals according to the present invention described above are as follows.

First, according to the broadcast signal receiving apparatus and the broadcast signal transmitting and receiving method according to the present invention, broadcast program information can be obtained accurately and conveniently.

Second, according to the broadcast signal receiving apparatus and the broadcast signal transmitting / receiving method according to the present invention, a user may pre-view a summary of a program as graphic information or audio information.

Third, according to the broadcast signal receiving apparatus and the broadcast signal transmitting / receiving method according to the present invention, when the electronic program guide transmitted as graphic information or audio information is encoded and transmitted, the information in the graphic form or the audio form is transmitted. Information can be efficiently encoded and transmitted and received.

Claims (19)

A broadcast signal decoder for decoding and outputting program information from the demodulated digital multimedia broadcast signal; A program information decoder configured to decode and output binary coded preview information capable of expressing summary information of a program in a video form among the program information; A program information output engine for processing the program information output by the program information decoder into a screen output signal; And And a display unit capable of expressing preview information among broadcast program information output by the program information output engine. The method of claim 1, The preview information may be implemented by XML (eXtensible Markup Language). The method of claim 1, And the preview information in the video format is included in an element having tag information binary encoded with a hexa value of 0x34. The method of claim 1, The preview information includes tag information of a preview element, length information of a preview element, and a data value of a preview element. The method of claim 4, wherein The tag information of the preview element is a broadcast signal receiving apparatus, characterized in that the binary encoding with a hexa (hexa) value 0x37. The method of claim 1, And the preview information includes attribute information indicating a name of the preview information. The method of claim 6, And the preview attribute information includes tag information encoded binary with a hexa value of 0x80. The method of claim 1, And the preview information comprises location information of a file resource of the preview information and file resource information of the preview information. The method of claim 8, The location information of the file resource of the preview information includes tag information encoded binary with a hexa value 0x80. Generating preview information in a video form containing a summary of the broadcast program; Binary encoding the preview information according to an element; Converting the program information including the binary coded preview information into a broadcast data format; And And transmitting the converted broadcast data. The method of claim 10, The element of the preview information includes a tag information for identifying the preview element, length information of the preview element, and a data value of the preview element. . The method of claim 10, The data value of the preview element may include attribute tag information indicating a name of the preview information, location tag information of a file resource of the preview information, and a file resource of the preview information. And tag information of the broadcast signal. Receiving a broadcast signal including preview information in the form of a video containing a summary of the broadcast program; Decoding the broadcast signal to obtain binary coded preview information; Binary decoding the obtained preview information; And And displaying the decoded preview information on a screen. The method of claim 13, The element of the preview information may include tag information identifying the preview element, length information of the preview element, and a data value of the preview element. Way. The method of claim 14, Tag information of the preview element (element) is a broadcast signal receiving method, characterized in that the binary encoding with a hexa (hexa) value 0x37. The method of claim 13, The data value of the preview element may include attribute tag information indicating a name of the preview information, location tag information of a file resource of the preview information, and a file resource tag of the preview information. The broadcast signal reception method comprising the (tag) information. The method of claim 16, The attribute tag information indicating the name of the preview information is binary encoded with a hexa value of 0x80. The method of claim 16, The location tag information of the file resource of the preview information is binary encoded with a hexa value 0x80. The method of claim 16, The tag information of the file resource of the preview information is binary coded with a hexa value 0x81.

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