KR101377951B1 - method of transmitting and receiving service guide information and apparatus for transmitting and receiving service guide information - Google Patents

Abstract

The present invention relates to a service guide information receiving method and a service guide information receiving device. The present invention provides a receiver that receives and demodulates a signal including description information about service guide information received through an interactive channel, a service that decodes the signal demodulated by the receiver, and includes description information on the service guide information. It provides a service guide information receiving device including a control unit for controlling to display the guide information and a display unit for displaying the description information of the service guide information under the control of the control unit.

Interactive Channels, Broadcast Channels, Service Guide Information, DVB

Description

Method of transmitting and receiving service guide information and apparatus for transmitting and receiving service guide information}

1 is a diagram showing an example of a data model for service guide information;

FIG. 2 is a diagram illustrating an example of a bootstrap information capable of receiving service guide information in a descriptor format.

3 is a diagram illustrating an example of entry point information of service guide information;

4 and 5 illustrate explanatory information on service guide information that a terminal can obtain when obtaining service guide information.

6 illustrates an embodiment of a transmitting device for transmitting content;

7 is a diagram illustrating the modulation and coding unit disclosed in FIG. 6.

8 is a diagram illustrating signal arrangement according to a result of the frame forming unit forming a frame in the example of FIG. 7;

9 is a diagram showing an example in which a broadcast program, contents, data,

10 is a diagram illustrating a receiving device for receiving service guide information.

11 is a diagram illustrating a system decoding unit of FIG. 10.

12 is a diagram illustrating an example of a protocol stack when service guide information and description information of service guide information are transmitted.

13 is a view showing an embodiment of a method of transmitting and receiving service guide information according to the present invention.

The present invention relates to a service guide information receiving method and a service guide information receiving device.

Content refers to content or information that includes images, sounds, and characters to a user via wired or wireless communication. Recent contents are produced in digital form and are provided through various broadcasting channels and interactive channels. For example, the user can download and view contents viewed through broadcasting through the Internet or the like. A broadcasting system and a communication system are merged, and a method of receiving the same contents from a broadcasting system and a communication system is considered.

An object of the present invention is to provide a method and apparatus for transmitting and receiving service guide information that can efficiently obtain information about a service guide.

In order to achieve the above object, the present invention provides a receiver for receiving and demodulating a signal including description information of service guide information received through an interactive channel, decoding the signal demodulated by the receiver, and Provided is a service guide information receiving apparatus including a control unit for controlling to display service guide information including description information and a display unit for displaying description information about the service guide information under the control of the control unit.

In another aspect, the present invention provides an encoding unit for encoding description information on service guide information received through an interactive channel, and multiplexing the service guide information and the content data including the encoded description information by multiplexing and outputting a multiplexed signal. It provides a service guide information transmitting apparatus comprising a modulator and an encoder for modulating, encoding and transmitting the multiplexed signal.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Hereinafter, information related to such serviced content and accessing the content is referred to as service guide information.

The service guide information includes all schedule information for each service that allows the user to select a service, and information for the user to purchase, access, and store items in the terminal. The user can receive the service guide information through the terminal, and can select or purchase a desired service.

The interactive channel refers to a channel capable of bidirectional communication, and the broadcast channel or broadcast channel refers to a channel for unidirectional communication without specifying a user during multicast.

The service guide information is a first process (hereinafter referred to as a bootstrap process) of recognizing whether the terminal can use the service guide information or how to obtain the service guide, and a second process of the terminal obtaining and processing the service guide information (hereinafter, Acquisition process), and may be processed by a third process (hereinafter, an update process) for updating the service guide information obtained by the terminal.

The terminal obtains the service guide information after obtaining the information for the first process from the received signal. Hereinafter, the information obtained in the first process is referred to as bootstrap information. The terminal obtains each service guide information through the bootstrap information, and obtains information about the service or accesses the service from the service guide information.

1 is a diagram illustrating an example of service guide information. The basic structure of the service guide information will be described with reference to FIG. 1.

Service guide information can be provided to the user in granular sub-units. Here, the subdivided sub-unit of the service guide information is called a fragment. The example of FIG. 1 shows a service fragment, a ScheduleEvent fragment, a contents fragment, a service bundle fragment, a purge fragment, a purseChannel fragment, and an acquisition. It contains a fragment. Arrows in FIG. 1 indicate reference relationships. According to the example shown in FIG. 1, the service fragment may refer to a service bundle fragment. The number illustrated above each arrow represents the possible number of each subunit information. For example, 0 ... n means that the subunit contains from 0 to n (n is any natural number).

The service fragment contains information about a service provided to the user, for example, a service such as one conventional television channel. The service bundle fragment contains information about a service group. The service group may be, for example, a sports service bundle, a cinema service bundle, or the like. The content fragment includes metadata about the content. For example, the type of A / V, text, image, etc. for the content may be included in the content fragment.

The schedule event fragment includes schedule information about one content of the service. For example, the broadcast time of the content may correspond to this. The furniture fragment includes information related to the purchase of a service that a user can purchase. The aperture channel refers to an interface through which a terminal or a user communicates with a purchase system. The aperture channel fragment includes information related to the purchase system and parameters related to the purchase system.

An Acquisition Fragment contains information related to access of a service or content. The user can access the service or the content through the information related to the reservation fragment from the terminal through the service guide information, and purchase the service or the content.

On the other hand, one or more fragment units may be encapsulated or formed into one larger unit and transmitted. This unit is called a container. The service guide information may be obtained from the bootstrap information. Hereinafter, the process of receiving the bootstrap information of the service guide information will be described.

FIG. 2 discloses an example in the form of a descriptor of bootstrap information capable of receiving service guide information. The bootstrap information on the service guide information provides information on the provider of the service guide information or information on the possible service guide information. FIG. 2 illustrates a descriptor related to obtaining service guide information (ESG Access Descriptor), and an entry point (ESGEntry) parsed from the descriptor is illustrated in FIGS. 3 and 4. A descriptor capable of obtaining service guide information describes an access to an entry point of service guide information transmitted on a broadcast channel.

The INT / IP notification table (INT) of one or more table information transmitted in a section of a broadcast signal is defined between an IP address of an IP (internet protocol) stream and a PID (packet identifier) of the transport stream in a transport stream of the broadcast signal. Contains mapping information. When the terminal obtains an IP address for receiving the bootstrap information of the service guide information from the mapping information INT, the terminal obtains the bootstrap information by using the program number (program_number) on the PMT on which the obtained IP address is obtained It is possible to know the packet ID that can be transmitted. When the packet corresponding to the packet ID is encapsulated in the MPE, the terminal decapsulates the MPE and obtain bootstrap information.

FIG. 2 discloses an example in the form of a descriptor of bootstrap information capable of receiving service guide information. The bootstrap information for the service guide information provides information on the provider of the service guide information or information on obtaining possible service guide information. FIG. 2 illustrates an descriptor (ESG Access Descriptor) related to obtaining service guide information, and FIG. 3 illustrates entry information (ESGEntry) parsed from the descriptor of FIG. A descriptor capable of obtaining service guide information describes an access to an entry point of service guide information transmitted on a broadcast channel.

The service guide information transmitted by the bootstrap information illustrated in FIG. 2 may be transmitted according to Asynchronous Layered Coding / Layered Coding Transport (ALC / LCT) in, for example, a File Delivery over Unidirectional Transport (FLUTE) session running on an IP protocol. Can be. Examples of protocols through which bootstrap information may be conveyed are illustrated in detail in FIG. 9.

The terminal can obtain the bootstrap information for the service guide information from the IP address described in the table information (for example, INT) according to the PSI / SI. For example, the IP address is in the IP version 4 format according to the DVB-H system. Bootstrap information can be obtained from 224.0.23.14 when transmitted via FF0X: 0: 0: 0: 0: 0: 0: 12D when using IP version 6. In FIG. 2, n_o_ESGEntries represents the number of entry information (number of ESGEnties) for service guide information in which access information is signaled in service guide information.

3 illustrates an example of a field included in entry information (ESGEntry) for service guide information illustrated in FIG. 2. In the entry information (ESGEntry) of the service guide information, the ESGEntryVersion field is a version of the entry information (ESG Entry) of the service guide information, and 1 may be set. The ESGEntryLength field indicates the length of ESGEntry in bytes. When the MultipleStreamTransport field is 1, it indicates that an IP address is provided through an announcement channel in a session for implementing service guide information, and that service guide information is provided at a location indicated by the IP address. Indicates that a container for all service guide information is provided in a session for implementing guide information. If IPVersion6 is 1, SourceIPAddress and DestinationIPAddress are set according to IP version 6.

The bootstrap information may describe access information on entry information of service guide information transmitted through an interactive channel as well as a broadcast channel. BraodcastFlag in the bootstrap information of FIG. 2 is identification information for describing whether service guide information is transmitted through a broadcast channel or an interactive channel. For example, when 1, service guide information is transmitted through a broadcast channel, and when 0, it indicates that the service guide information is transmitted through an interactive channel.

When BraodcastFlag is 1, the ProviderID field set after the 5-bit unspecified area indicates an identifier of a provider of service guide information. The bootstrap information of the service guide information is based on the value of the IPVersion6 field. The source IP address (SourceIPAddress) and the destination IP address (operating in the session (eg FLUTE session) driving the service guide information for transmitting the service guide information (eg DestinationIPAddress) may be included respectively. The IP address may describe a source and death IP address when the IPvesion6 field is IPversion6 or IP version 4 according to a value.

The Port field represents a port of an IP stream of a FLUTE session through which service guide information is transmitted, and the TSI field is set to a transport session identifier of a session driving service guide information.

If the terminal receives the service guide information from the broadcast channel from the BraodcastFlag field of the entry information (ESGEntry) of the service guide information, the terminal may obtain the service guide information from the broadcast channel according to the above-described information.

If BroadcastFlag is 0, if service guide information is received from the interactive channel, the 2-bit Mode field indicates mode information for establishing a relationship between service guide information received from the interactive channel and service guide information received from the broadcast channel. Indicates. For example, the Mode field value 00 is information for replacing service guide information received from a broadcast channel with service guide information received from an interactive channel. When the Mode field is 01, this is information for adding service guide information of an interactive channel to service guide information received from a broadcast channel. In the mode 00 or 01, the service guide information may be a container unit or a fragment unit. When the Mode field is 10 or 11, this is information to give priority to the service guide information received from the broadcast channel, and is information to generate the service guide information using only the service guide information received from the broadcast channel. The service guide information received according to the mode may be a container unit or a fragment unit.

If the service guide information is received from the interactive channel, the FileDescURL field is a field in which location information on which description information of a file including service guide information is located is set, and FileDescURLLength indicates the length of the description information. When RequestURL receives service guide information in a container unit or a fragment unit from an interactive channel, location information of the service guide information may be set, and RequestURLLength may have length information of the location information. Therefore, when the terminal receives the guide service information from the interactive channel, it receives the description of the guide service information in file units from the FileDescURL and receives the service guide information from the RequestURL in a predetermined unit, for example, a fragment unit or a container unit. can do. Hereinafter, a broadcast communication system for transmitting and receiving service guide information or bootstrap information of service guide information illustrated in FIGS. 2 to 4 will be described.

4 and 5 illustrate explanatory information on the service guide information that can be obtained by the terminal when the service guide information is obtained. A container means a transport object to which service guide information is transmitted. When a container is bundled and transmitted in a fragment unit, the container is efficient in data transmission and data processing. Since the service guide information is transmitted in a container or a fragment unit, the container may be one element of the service guide information.

The description information about the service guide information may be generated as a file including the information illustrated in FIGS. 4 and 5. When the container includes one or more fragments, the description information about the service guide information may include description information about the container and description information about the fragment, respectively. Alternatively, the description information of the service guide information may include hierarchical description information of the fragment under the description information of the container. 4 and 5 illustrate the description information of the service guide information in XML, and is information indicating an example in which the description information about the container (element name is container) includes description information of the fragment (element name is fragment). .

The description information of the container includes identifier (id) information (a) of the description information of the container, version information (b) of the description information of the container, encoding type (c) of the description information file of the container, and At least one of original size information (d) of the file before coding and transfer length information (e) of the file after coding may be included.

The description information about the service guide information may include an ID and a version type as its attributes. The ID may be an identifier for the description information, and the version type may indicate a version for the description information.

Meanwhile, the description information about the fragment may be included in the description information of the container. In FIG. 4, the type of the fragment element in the container element is defined as FragmentType, which may follow the example of FIG. 5. That is, as illustrated in FIG. 4, the description information about the container may include fragment description information.

The description information of the fragment includes any one of an identifier (id) (a) of the fragment description information, a version information (version) of the fragment description information, and type information (c) of the fragment description information.

Accordingly, as illustrated in FIGS. 3 and 4, when the terminal receives the container and the fragment through the interactive channel, the terminal illustrates the description information of the service guide information that can be obtained through the interactive channel in FIGS. 4 and 5. As can be obtained. Alternatively, the terminal may receive description information of the service guide information illustrated in FIGS. 4 and 5 through a broadcast channel.

Hereinafter, a broadcast communication system in which service guide information may be delivered is illustrated. 6 is a diagram illustrating an embodiment of a transmitting device for transmitting content. An embodiment of a content transmission device will now be described with reference to FIG. 6. In the example of FIG. 6, it is assumed that content is transmitted through a broadcast service.

The broadcast system disclosed in FIG. 6 includes an encoder 310, 320, 330, a multiplexer 340, and a modulator 350. The encoding unit includes a first encoding unit 310, a second encoding unit 320, and a third encoding unit 330.

The first encoding unit 310 may encode content according to audio, video, and data according to a transmission / reception protocol such as, for example, a transport stream of MPEG-2. Data including the service guide information may be transmitted in units including an IP address. The second encoding unit 320 may encode data including service guide information in the form of an IP datagram. The IP datagram refers to a signal processing format for signaling in packets by an internet protocol, and may include a header including an IP address and a data container for transmitting information. The data container of the packet-based IP datagram may include data such as video, audio, and service guide data. In other words, the example of FIG. 6 can transmit information by performing an IP protocol (Internet protocol datacasting) method in which a video signal, an audio signal, and a data signal are divided into packets and then transmitted.

IP data may be encapsulated in multi-protocol encapsulation (MPE) and then embedded in an MPEG-2 trasnport stream (TS). The MPE may be MPE-FEC section data with a forward error correction code (FEC) added. By arranging the transmission signal by a multi-protocol encapsulation-forward error correction (MPE-FEC) scheme, the carrier-to-noise (CN) ratio of the transmission signal can be improved. The MPE-FEC data including the FEC or the MPE data not including the FEC may include the transmission data of the IP data format.

The second encoder 320 may multiplex the IP datagram encapsulated with the MPE using a time slicing technique to reduce power consumption. The multiplexed signal is converted to a transport stream and multiplexed with MPEG-2 transport stream packets carrying video or audio signals.

The second encoder 320 may encode the service guide information. In addition, as illustrated in FIGS. 4 and 5, the second encoder 320 may encode description information about at least one of a container and a fragment.

The third encoder 330 may encode multiplexing information of a stream packet related to a program or a service. The multiplexing information includes table information for PSI / SI (Program Specific Information / Service Information). The table information encoded by the third encoding unit 330 includes INT ((1) including mapping information between a packet ID (PID) including an IP datagram encoded by the second encoding unit 320 and an IP address of the IP datagram. IP / MAC Notification table)).

The multiplexing unit 340 multiplexes and outputs the transport packets output from the first encoding unit 310, the second encoding unit 320 and the third encoding unit 330, and the modulation and coding unit 350 The multiplexed signal can be modulated, encoded and transmitted.

When the multiplexing unit 340 multiplexes the packet data encoded by the first encoding unit 310, the second encoding unit 320 and the third encoding unit 330 and outputs the packet data, the modulation and encoding unit 350 outputs the multiplexed signal May be modulated and encoded according to the modulation and coding unit 350 according to the transmission system, and may be transmitted as a radio frequency (RF) signal. The modulation and coding unit 350 may follow modulation schemes and encoding schemes of various broadcasting systems. For example, a modulation scheme such as a DMB scheme, a DVB-H scheme, a VSB scheme, and an ISDB-T scheme may be used. A detailed example of the modulation and coding unit 350 is described in detail with reference to FIG. 7.

FIG. 7 is a diagram illustrating the modulation and coding unit disclosed in FIG. 6. In FIG. 6, the modulation and coding scheme may be, for example, a digital video broadcasting-terrestrial / handheld (DVB-T / H) scheme.

The first encoding unit 410 includes an outer coder 411 and an outer interleaver 412. The first encoder 410 may encode and interleave the multiplexed data to improve the transmission performance of the multiplexed signal. For example, a Reed-Solomon code can be used as an outer coding scheme, and a convolution interleaving scheme can be used as an interleaving scheme.

The second encoder 420 includes an inner coder 421 and an inner interleaver 422. An inner coder 421 and an inner interleaver 422 encode a signal to be transmitted in preparation for an error in a transmission signal to perform interleaving. An inner coder may encode a transmission signal in accordance with a punctured convolutional code and inner-interleaving may encode a transmission signal according to the memory usage according to the 2k, 4k, and 8k transmission modes. Native or in-depth interleaving schemes may be used.

The mapper 430 maps the transmission signal to 16QAM, 64QAM, QPSK, and the like in consideration of a pilot signal and a transmission parameter signal (TPS) according to the transmission mode generated by the system signal generator 425 It can be mapped to a symbol according to a method.

The frame forming unit 440 modulates the mapped signal in an orthogonal frequency division multiplex (OFDM) scheme, and forms a frame in which a guard interval is inserted in a data section including the modulated signal. Each frame contains 68 OFDM symbols and four frames form a superframe. Each symbol includes 6817 carriers in 8k mode and 1705 carriers in 2k mode. The guard interval is a cyclic continuation obtained by copying the data of the data interval, and the length varies depending on the transmission mode. The OFDM frame includes a scattered pilot signal, a continuous pilot signal, and a TPS carrier, respectively. An example of a signal frame by the frame forming unit of FIG. 4 is disclosed in FIG. 5.

The digital-analog converter 450 converts a digital broadcast signal having a guard interval and a data interval into an analog signal, and the transmitter 460 converts the analog signal converted by the digital-analog converter 450 into a radio frequency ) Signal.

FIG. 8 is a diagram illustrating a signal arrangement according to a result of forming a frame in the example of FIG. 7. FIG. In Fig. 8, Tu represents the number of usable subcarriers, Dt represents the distance between scattered pilots on the time axis, and Df represents the distance between scattered pilots on the frequency axis. The distance (Df) between scattered pilots in the frequency domain determines the delay range of the ghost that can be estimated in the channel. 5 shows a signal formed by the frame forming unit up to the position of a pilot to be interpolated upon reception.

Therefore, when receiving such a signal, time interpolation is performed at the pilot position, and symbols are arranged so that the same pilot pattern appears for every four input symbols. That is, if a scattered pilot signal that is the same as the symbol input at the time t = 5 is disposed for the first symbol t = 1, the terminal receiving the signal transmits the received symbol at t = 2, 3, Lt; RTI ID = 0.0 > interpolation < / RTI >

Also, since the symbol input at t = 6 has the same scattered pilot pattern as the symbol input at t = 2, the terminal receiving the signal can not use the symbol input at t = 6 and the scattered pilot Time interpolation can be performed on the signals at t = 3, 4, 5 on the position.

When the signal is received at time t = 7 and then interpolated in the above manner, the symbols input at t = 4 are distributed pilots at four subcarrier positions, and thus the frequency of the input symbol at t = 4. The interval between the distributed pilot signals in the region is reduced to one quarter of the interval between the original distributed pilot signals, and a symbol input at t = 4 has a pattern in which the distributed pilot signals are located at four subcarrier positions. Thus, a terminal receiving a signal can obtain the effect that a more pilot signal can be processed as if it were located in a symbol. Therefore, when the signal is transmitted using the continuous pilot signal and the distributed pilot signal, channel compensation can be adaptively performed according to the state of the reception channel at the time of receiving the signal.

9 is a diagram illustrating an example in which a broadcast program, content and data are transmitted through a channel. According to the broadcasting system disclosed in FIGS. 6 and 7, a service to which a type slicing scheme is applied to DVB-H and a service transmitted on a common channel of DVB-T and DVB-H may be transmitted. Programs can be transmitted according to the channels of DVB-H and DVB-T, respectively. In case of DVB-H, each service can be time-division multiplexed by time slicing and transmitted. Content and service guide information, including video / audio, can be included in IP datagrams by the DVB-H system and transformed into MPE or MPE-FEC and transmitted to MPEG-2 TS with the modified MPE or MPE-FEC embedded. have.

10 is a diagram illustrating a receiving device for receiving service guide information. An apparatus for receiving service guide information will be described below with reference to FIG. 10. The apparatus for receiving content through the service guide includes a receiver, an input unit 530, a storage unit 550, a display unit 560, and a controller 600. The receiver may include a broadcast receiver 510 that receives a signal from a broadcast channel and a communicator 520 that receives a signal from an interactive channel and transmits a signal to the interactive channel. For example, the channel that the communication unit 520 interacts with may be a wired or wireless channel capable of data communication in both directions.

The broadcast receiver 510 receives the broadcast signal, demodulates it, and outputs the broadcast signal. For example, the broadcast receiver 510 may include a tuner for receiving a broadcast signal according to DVB-H, and a demodulator for demodulating a broadcast signal of DVB-H format according to the OFDM scheme.

The broadcast receiver 510 receives the broadcast signal, demodulates it, and outputs the broadcast signal. For example, the broadcast receiver 510 may include a tuner for receiving a broadcast signal according to DVB-H and a demodulator for demodulating a DVB-type signal frame according to an OFDM scheme. When the service guide information receiving device receives the service guide information, description information about the service guide information received by the broadcast receiver 510 may be included in the broadcast signal. In addition, since the service guide information may be received through the interactive channel, the signal received by the communication unit 520 may include description information about the service guide information.

The broadcast receiver 510 and the communicator 520 output the received signal to the controller 600.

The controller 600 may include a system decoder 610, a decoder 620, a service guide controller 630, a channel map storage 640, and a system encoder 650. The controller 600 may control the surrounding functional blocks illustrated in FIG. 10 and process a control command received from the user.

FIG. 11 is a diagram illustrating the system decoder 610 of FIG. 10.

The system decoder 610 may process a broadcast signal received from the broadcast receiver 510. The system decoder 610 may include an IP decapsulator 611, a user datagram protocol (UDP) decoder 612, an RTP decoder 613, and a file delivery over unidirectional transport protocol (FLUTE) decoder 614. ), A container parser 614, a beam parser 615, and an XML parser 616.

The system decoder 610 decodes the content data transmitted in real time in consideration of system encoding. The content data of the file format and the data for the service guide information can be decoded.

An example in which the system decoder 610 decodes content data transmitted in real time is as follows. The IP decapsulator 611 decapsulates the data included in the payload by referring to the header from the IP packet. The user datagram protocol (UDP) decoder 612 may obtain content data transmitted in real time from the decapsulated payload. The RTP decoder 613 may output the encoded content data by controlling the content data decoded by the UDP (user datagram protocol) decoder 612 to adjust the encoding rate using the RTP control protocol (RTP). The audio / video signals output from the RTP decoder 613 may be decoded by the decoder 620, respectively.

When the system decoder 610 decodes the data for the service guide in the file format, the FLUTE decoder 614 decodes the received signal and decodes the data in the FLUTE (IETF RFC3926: File Delivery over Unidirectional Transport) format. For example, files such as binary data, image data, and text and service guide information can be output.

The container parser 615 decodes and outputs a file of a container unit among the service guide information. In response to the output of the container parser, the beam BiM parser 616 decodes data and transmits the decoded data to the XML parser 617. The XML parser 617 may decode an XML format file output by the container parser 615 or the BiM parser 617.

The system decoder 610 and the communication system decoder 670 may decode the description information of the service guide information illustrated in FIG. 5 in the order illustrated above. For example, the system decoder 610 may decode the description information of the service guide information through a broadcast signal even when the service guide information is generated in the form of XML-based file and encapsulated according to FLUTE.

The decoder 620 may include a video decoder, an audio decoder, and a data decoder for decoding data according to the MPEG-2 TS. The video decoder may decode and output video data in H.264 format, for example, and the audio decoder may decode audio data in AAC + format, for example.

The service guide controller 630 may receive the service guide information and the descriptive information of the service guide information, which are decoded and output by the system decoder 610, and may be expressed through an application. The service guide controller 630 may receive the channel map information from the service guide information and store it in the channel map storage 633. The application 635 related to the service guide information, for example, a browser, may be driven to process and display the service guide information.

The storage unit 550 may store service guide information or information on a file. The decoder 620 may store data decoded. The input unit 530 receives the control command input by the user and outputs the control command to the control unit 600. [ The display unit 560 may output an audio or video signal output by the control unit 600. [ In addition, the application driven by the controller 600 may output the image and the sound. For example, the application for the service guide information may provide the service guide information to the user.

The controller 600 may include a system decoder 670 to transmit / receive with an interactive channel. The system decoding unit 670 may encode a signal to be transmitted through the interactive channel or decode a signal received from the interactive channel from the communication unit 520. When the communication unit 520 receives the signal through the interactive channel, the communication unit 520 may demodulate the signal and output the encoded signal output by the communication system decoding unit 670. The modulation and encoding method of the communication system coder 670 may be based on a modulation and encoding method of a communication system capable of bidirectional data communication according to an interactive channel. Accordingly, when the service guide information is obtained through the interactive channel, the terminal may receive description information about the container and the fragment unit of the service guide information. The terminal may receive description information on the container and the fragment illustrated in FIGS. 4 and 5 through the interactive channel.

FIG. 12 shows an example of a protocol stack when the service guide information and the description information of the service guide information are transmitted by the DVB-H disclosed above. In the case of the protocol stack, if service guide information is transmitted according to the DVB-T / H 710, the transmitted signal follows the protocol 720 related to the transport stream defined in the DVB. According to DVB-H, the transport stream may comply with the time slicing rule 725 and becomes a signal in a multiprotocol encapsulation (MPE) or multiprotocol encapsulation-forward error correction (MPE-FEC) form 729. Information according to PSI / SI may be delivered to the transport stream. There is a signal in the transport stream according to the form 730 of the IP datagram. The data according to the IP datagram follows the protocol of UDP 740 or TCP. Content transmitted / received in the form of real-time streaming among the contents delivered in UDP may be in accordance with the RTP 750, and contents delivered in the form of a file may be in accordance with FLUTE / ALC. Streaming content according to RTP 750 may be transmitted according to H.264 / AAC +. On the other hand, the content delivered in the form of a file may be data according to XML (eXtensible Markup Language), binary, text, or the like, or may include service guide information according to XML / SDP. XML (eXtensible Markup Language) is an object-oriented language, and the service guide information or the description information about the service guide information may be transmitted in a signal layered in units of objects through FLUTE. Description information on the service guide information is illustrated in FIGS. 4 and 5.

13 is a view showing an embodiment of a method of transmitting and receiving service guide information according to the present invention. An embodiment of a method of transmitting and receiving service guide information according to the present invention will be described with reference to FIG. 13 as follows.

The service guide information and the description information about the service guide information received through the interactive channel are encoded (S110). The description information about the service guide information may be generated in an IP datagram format and encoded according to the ALC / FLUTE and UDP formats. An example of the service guide description information may be described with reference to FIGS. 4 and 5. The process of encoding the service guide information and the description information about the service guide information is illustrated in FIG. 6.

After the description information on the encoded service guide information is multiplexed according to the transmission system, the multiplexed signal is encoded, modulated, and transmitted (S120). A process of encoding, modulating and transmitting according to the transmission system may refer to FIGS. 6 and 7.

In operation S130, a signal including description information about service guide information received through the interactive channel is received. The service guide information is displayed by demodulating and decoding the received signal (S140). A process of receiving description information about service guide information, demodulating it, and expressing it may refer to FIGS. 10 and 11. Therefore, when the terminal obtains the service guide information from the interactive channel, the user can easily use the service guide information received from the interactive channel by receiving description information about the service guide information.

Referring to the effects of the present invention according to the embodiment disclosed above are as follows. According to the service guide information transmission and reception method and the service guide transmission and reception apparatus according to the present invention, it is possible to efficiently obtain information about the service guide and description information about the service guide information.

Claims (8)

A receiver which receives and demodulates a signal including service guide information received through an interactive channel and description information about the service guide information included in the service guide information; Wherein the service guide information is subdivided into one or more fragments as information related to the content and accessible to the content, and the service guide information includes a container created by encapsulating the one or more fragments or formed in a larger unit. One element, The description information of the service guide information includes description information of the container, and the description information of the container includes identifier information of the description information of the container, version information of the description information of the container, and description information of the container. Contains file size information after encoding of the containing file, The description information of the container includes description information of the fragment, and the description information of the fragment further includes identifier information of the description information of the fragment and version information of the description information of the fragment; A controller configured to decode the demodulated signal by the receiver and to display service guide information including description information about the service guide information; And And a display unit for displaying description information about the service guide information under the control of the controller. The method according to claim 1, The description information of the container includes information indicating a file name of the description information file of the container, packet identifier information of a packet including the description information file of the container, type information of encoding of the description information file of the container, and At least one of file size information before encoding of the description information file, The description information of the fragment, Further comprising type information about the description information of the fragment, Service guide information receiving device. An encoding unit for encoding descriptive information about service guide information received through the interactive channel, Wherein the service guide information is subdivided into one or more fragments as information related to the content and accessible to the content, and the service guide information includes a container created by encapsulating the one or more fragments or formed in a larger unit. One element, The description information of the service guide information includes description information of the container, and the description information of the container includes identifier information of the description information of the container, version information of the description information of the container, and description information of the container. Contains file size information after encoding of the containing file, The description information of the container includes description information of the fragment, and the description information of the fragment further includes identifier information of the description information of the fragment and version information of the description information of the fragment; A multiplexer for multiplexing service guide information and the content data including the encoded description information and outputting a multiplexed signal; And And a modulation and coding unit for modulating, encoding, and transmitting the multiplexed signal. The method of claim 3, Descriptive information of the container, Information indicating a file name of a description information file of the container, packet identifier information of a packet including the description information file of the container, type information of encoding of the description information file of the container, and a file before encoding of the description information file of the container Further includes at least one of the size information, The description information of the fragment, Further comprising type information about the description information of the fragment, Service guide information transmitter. A demodulation step of receiving and demodulating a signal including service guide information received through an interactive channel and description information of the service guide information included in the service guide information; Wherein the service guide information is subdivided into one or more fragments as information related to the content and accessible to the content, and the service guide information includes a container created by encapsulating the one or more fragments or formed in a larger unit. One element, The description information of the service guide information includes description information of the container, and the description information of the container includes identifier information of the description information of the container, version information of the description information of the container, and description information of the container. Contains file size information after encoding of the containing file, The description information of the container includes description information of the fragment, and the description information of the fragment further includes identifier information of the description information of the fragment and version information of the description information of the fragment; A control step of decoding the demodulated signal and controlling to display service guide information including description information of the service guide information; And And a display step of displaying description information on the service guide information according to the control. 6. The method of claim 5, Descriptive information of the container, Information indicating a file name of a description information file of the container, packet identifier information of a packet including the description information file of the container, type information of encoding of the description information file of the container, and a file before encoding of the description information file of the container Further includes at least one of the size information, The description information of the fragment, Further comprising type information about the description information of the fragment, How to receive service guide information. An encoding step of encoding service guide information received through an interactive channel and description information about the service guide information included in the service guide information; Wherein the service guide information is subdivided into one or more fragments as information related to the content and accessible to the content, and the service guide information includes a container created by encapsulating the one or more fragments or formed in a larger unit. One element, The description information of the service guide information includes description information of the container, and the description information of the container includes identifier information of the description information of the container, version information of the description information of the container, and description information of the container. Contains file size information after encoding of the containing file, The description information of the container includes description information of the fragment, and the description information of the fragment further includes identifier information of the description information of the fragment and version information of the description information of the fragment; A multiplexing step of multiplexing service guide information and content data including the encoded description information and outputting a multiplexed signal; And And a transmission step of modulating, encoding and transmitting the multiplexed signal. 8. The method of claim 7, Descriptive information of the container, Information indicating a file name of a description information file of the container, packet identifier information of a packet including the description information file of the container, type information of encoding of the description information file of the container, and a file before encoding of the description information file of the container Further includes at least one of the size information, The description information of the fragment, Further comprising type information about the description information of the fragment, How to send service guide information.

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