KR20080101590A - Method of receiving service guide information and apparatus for receiving service guide information - Google Patents

Abstract

A service guide information receiving method and a service guide information receiving apparatus are provided to obtain information with regard to a service effectively. A receiving unit receives a signal including bootstrap information. The bootstrap information includes identification information. The identification information shows whether service guide information is received through a broadcast channel or an interactive channel(S110). The receiving unit receives the service guide information according to the identification information. A controlling unit controls the receiving unit and a display unit. The receiving unit receives the service guide information through the broadcast channel or interactive channel according to the bootstrap information received by the receiving unit(S120). The received service guide information is displayed. The display unit displays the service guide information(S130).

Description

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

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

2 is a diagram illustrating an example of a bootstrap information that can receive service guide information in a descriptor format.

3 is a diagram illustrating an example of bootstrap information for service guide information;

4 is a diagram illustrating an embodiment of a transmitting device for transmitting service guide information;

5 is a diagram illustrating the modulation and coding unit disclosed in FIG. 4.

6 is a diagram illustrating signal arrangement according to a result of the frame forming unit forming a frame in the example of FIG. 5;

7 illustrates an example in which a broadcast program, content and data are transmitted through a channel.

8 and 9 illustrate a receiving apparatus for receiving service guide information.

10 is a diagram illustrating an example of a protocol stack to follow when service guide information is delivered.

11 is a view showing an embodiment of a method of 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 including images, sounds, and text to a user via wired or wireless communication. Recent content is digitally produced and provided through various broadcast channels and interactive channels. For example, a user may download and watch content watched through a broadcast through the Internet. As the broadcasting system and the communication system are converged, a method of receiving the same contents from the broadcasting system and the communication system is being considered.

An object of the present invention is to provide a service guide information receiving method and a service guide information receiving device capable of efficiently obtaining information on a service.

The present invention receives a signal including bootstrap information having identification information indicating whether service guide information is received on at least one of a broadcast channel and an interactive channel, and receives service guide information according to the identification information. A control unit configured to control the receiver to receive the service guide information on at least one of a broadcast channel and an interactive channel according to the bootstrap information received by the receiver, and to display the received service guide information. ; And a display unit for displaying service guide information under the control of the controller.

In another aspect, the present invention provides a first reception step of receiving a signal including bootstrap information having identification information indicating whether service guide information is received in at least one of a broadcast channel and an interactive channel, the bootstrap And a second receiving step of receiving the service guide information on at least one of a broadcast channel and an interactive channel according to the information, and a displaying step of displaying the received service guide information.

Hereinafter, embodiments will be described with reference to the accompanying drawings.

Hereinafter, the information related to the serviced content and access to the content is referred to as service guide information.

The service guide information includes at least one of schedule information for each service that allows the user to select a service, and information that allows the user to purchase, access, and store items in the terminal. The user may be provided with service guide information through the terminal, and may select or purchase a desired service. Here, the interactive channel refers to a channel capable of bidirectional communication, and the broadcast channel or broadcast channel refers to a unidirectional communication channel without designating a user among multicasts.

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, the terminal may be processed by a third process of updating the service guide information obtained by the terminal (hereinafter, an update process).

After obtaining the information for the first process from the received signal, the terminal may use the information as trigger information to obtain service guide information. Hereinafter, the information obtained in the first process is referred to as bootstrap information. The terminal may obtain respective service guide information through the bootstrap information, and may obtain information about each service or access content 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.

The service guide information may be provided to the user in subdivided 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 content 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 bundle fragment may refer to a service 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 content fragment may include a type such as A / V, text, or image for the content 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 fragment refers to an interface through which a terminal or a user communicates with a purchasing 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. A user may access and purchase a service or content through information related to an acquisition fragment through service guide information from a terminal.

The service guide information may have a layered structure, and each subunit of the layered structure is called a fragment. Each fragment may be encoded so that one or more fragment units may be encapsulated or formed into one larger unit and transmitted. This encapsulated unit is called a container. The container of the service guide information may be transmitted and received according to a protocol for transmitting the service guide information. This transmission and reception system is illustrated in FIGS. 4, 5, 8 and 9, and the transmission and reception protocol is illustrated in FIG. 10.

Meanwhile, as described above, 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.

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 bootstrap information of service guide information from INT, which is mapping information from a broadcast signal, the terminal receives bootstrap information by using a program number (program_number) on a PMT in which the obtained IP address is defined. You can see the packet ID. When the packet corresponding to the packet ID is MPE encapsulated, the terminal may decapsulate the MPE to obtain bootstrap information.

FIG. 2 discloses an example in which a bootstrap information capable of receiving service guide information is described in a descriptor format. The bootstrap information on the service guide information provides information on a 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 represents the length of an 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 the source IP address (SourceIPAddress) and the destination IP address operating in the session (for example, FLUTE session) driving the service guide information to transmit the service guide information according to the value of the IPVersion6 field. Each of the (DestinationIPAddress) may be included. 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 is a diagram illustrating an embodiment of a transmitting device for transmitting service guide information. An embodiment of a content transmission device will be described below with reference to FIG. 4. In the example of FIG. 4, it is assumed that content is transmitted through a broadcast service.

The broadcast system disclosed in FIG. 4 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 an information transmission protocol such as a transport stream of MPEG-2. Data including service guide information may be transmitted in units including an IP address. The second encoder 320 may encode data including service guide information in an IP datagram format. The IP datagram refers to a signal processing format in which a signal is transmitted in a packet by an internet protocol, and includes 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. That is, in the example of FIG. 4, the video signal, the audio signal, and the data signal may be transmitted by performing an IP protocol (IP datacasting) method of dividing and compressing the video signal, the audio signal, and the data signal.

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. MPE-FEC data including FEC or MPE data without FEC may include transmission data in an IP data format.

The second encoder 320 may multiplex the IP datagram encapsulated with the MPE by using a time slicing technique to reduce power consumption. The multiplexed signal is converted into a transport stream and multiplexed with MPEG-2 transport stream packets carrying video or audio signals. In addition, the second encoder 320 may encode the service guide information in the IP datagram format.

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 about PSI / SI (Program Specific Information / Service Information). The table information encoded by the third encoding unit 330 includes INT (IP / MAC Notification table) including mapping information of an IP address encoded by the second encoding unit 320 and a packet ID (PID) including an IP datagram. ) May be included. Accordingly, the third encoding unit 330 may encode and transmit INT information including IP address information about the information on the bootstrap information. The bootstrap information at the location according to the information of the IP address may include the information illustrated in FIG. 3.

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

When the multiplexer 340 multiplexes and outputs the packet data encoded by the first encoder 310, the second encoder 320, and the third encoder 330, the modulation and coding unit 350 may multiplex the signal. The signal may be modulated and encoded according to the modulation and coding unit 350 according to the transmission system and then transmitted as an 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.

FIG. 5 is a diagram illustrating the modulation and coding unit disclosed in FIG. 4. In FIG. 5, the modulation and coding scheme may follow, for example, a digital video broadcasting-terrestial / handheld (DVB-T / H) scheme.

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

The second encoder 420 includes an inner coder 421 and an inner interleaver 422. The inner coder 421 and the inner interleaver 422 perform interleaving by recoding a signal to be transmitted in preparation for an error in the transmission signal. The inner coder can encode the transmission signal according to the punctured convolution code, and the inner-interleaving scheme is based on the memory usage according to the transmission modes of 2k, 4k and 8k. Native or in-depth interleaving schemes may be used.

The mapper 430 may transmit a transmission signal such as 16QAM, 64QAM, QPSK, etc. in consideration of a pilot signal and a transmission parameter signal (TPS) according to a transmission mode generated by the system signal generator 425. You can map them to symbols according to the method.

The frame forming unit 440 modulates the mapped signal by 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 super frame. Each symbol includes 6817 carriers in 8k mode and 1705 carriers in 2k mode. The guard interval is a cyclic continuation in which data of the data interval is copied, and its length varies depending on the transmission mode. The OFDM frame includes a distributed 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. 4.

The digital analog converter 450 converts a broadcast signal in a digital format 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 (RF). ) Can be transmitted by a signal.

6 is a diagram illustrating signal arrangement according to a result of the frame forming unit forming the frame in the example of FIG. 5. In Fig. 6, Tu represents the number of usable subcarriers, Dt represents the distance between distributed pilots on the time axis, and Df represents the distance between distributed pilots on the frequency axis, respectively. The distance Df between the distributed pilots in the frequency domain determines the delay range of the ghost that can be estimated in the channel. FIG. 6 shows the signals formed by the frame forming unit up to the positions of pilots to be interpolated upon reception.

Therefore, when receiving the signals arranged in this way, the interpolation is performed at the pilot position, and the symbols are arranged so that the same pilot pattern appears for every four input symbols. That is, if the first input symbol (t = 1) is the same distributed pilot signal as the symbol input at t = 5, the terminal receiving the signal is a symbol received at t = 2, 3, 4 at the position of the distributed pilot signal Time interpolation can be performed for.

Further, since the symbol input at t = 6 has the same distributed pilot pattern as the symbol input at t = 2, the terminal receiving the signal is a distributed pilot of the symbol input at t = 6 and the symbol input at t = 2. Time interpolation may be performed on signals t = 3, 4, and 5 in 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, the terminal receiving the signal can have the effect of processing the signal as more pilot signals are located in the 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.

7 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. 4 and 5, 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 channels of respective DVB-H and DVB-T. In case of DVB-H, each service can be transmitted by time division multiplexing by time slicing. 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.

8 and 9 illustrate a receiving apparatus for receiving service guide information. An apparatus for receiving service guide information will be described below with reference to FIGS. 8 and 9. The apparatus for receiving service guide information 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 communication unit 520 that receives a signal from an interactive channel and transmits and receives a signal through 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, demodulates and outputs a 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 demodulates the received broadcast signal and outputs the demodulated signal to the controller 600. The broadcast signal received by the broadcast receiver 510 includes service guide information or bootstrap information of service guide information. The bootstrap information includes the information illustrated in FIG. 3.

The controller 600 may include a system decoder 610, a decoder 620, a service guide controller 630, a channel map storage 640, and a communication system decoder 670. The controller 600 may control the surrounding functional blocks illustrated in FIG. 8 and process a control command received from the user.

9 is a diagram illustrating the system decoder 610 in detail.

The system decoder 610 may decode in consideration of encoding of a system in which a broadcast signal demodulated by the broadcast receiver 510 is encoded. The system decoder 610 may process the service guide information demodulated by the broadcast receiver 510 as follows.

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 may decode content data transmitted in real time in consideration of system encoding. For example, the system decoder 610 may decode a file including content data and service guide information transmitted in an IP datagram format.

An example in which the system decoding unit 610 decodes content data or service guide information in the IP datagram format is as follows. First, the IP decapsulator 611 decapsulates the content data included in the payload of the IP packet with reference to the header of the IP packet. The user datagram protocol (UDP) decoding unit 612 may decode content data transmitted in real time from the IP decapsulated payload according to the user datagram protocol (UDP). 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 signal of the content output from the RTP decoder 613 is output to a decoder 620 including an audio decoder and a video decoder, respectively.

When the system decoding unit 610 decodes the data for the service guide information in the file format, the data decoded by the UDP decoding unit 612 is output after the FLUTE decoding 614.

The FLUTE decoding unit 614 may decode data in FLUTE (IETF RFC3926: File Delivery over Unidirectional Transport) format and output files such as binary data, image data, and text. The data decoded and output by the FLUTE decoding unit 614 may include a file including service guide information.

The container parser 615 decodes the container unit file among the service guide information and outputs the fragment unit information. When the service guide information is output in the beam BiM format according to the output of the container parser 615, the beam BiM parser 616 decodes the data according to the BiM format and transmits the 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 decoder 620 may decode video, audio, and data information decoded by the system decoder 610 and the communication system decoder 670, respectively. 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. In addition, the decoder 620 may include a data decoder (not shown) capable of decoding table program information / service information according to PSI / SI. For example, the decoder 620 may decode table information such as a program associate table (PAT), a program map table (PMT), a network information table (NIT), or may decode a broadcast signal according to data broadcasting. The decoder 620 may parse INT (IP / MAC Notification table), which is table information, from the PMT. INT contains mapping information between the IP address of the IP stream and the PID of the transport stream in the transport stream. Therefore, when the service guide receiving apparatus obtains an IP address for receiving bootstrap information of the service guide information from the INT, the bootstrap information may be received through the broadcast channel or the interactive channel using the obtained IP address. An example of bootstrap information received by the service guide receiving apparatus through a broadcast channel or an interactive channel is illustrated in FIG. 3. When the service guide receiving apparatus obtains the bootstrap information, the service guide receiving apparatus may receive and decode the service guide information according to the above-described process. An example of expressing the decoded service guide information is as follows.

The service guide information controller 630 may store, process, and display information related to the service guide, which is decoded and output by the system decoder 610. The service guide information controller 630 includes a controller 613, a channel map storage 633, and an eastern portion 635 of the browser driving unit.

 The received service guide information may be stored in the storage unit 550. The controller 631 may extract channel map information from the service guide information and store the channel map information in the channel map storage unit 633. The controller 631 may drive a browser driver 635 or the like to drive the received or stored service guide information so as to display the service guide information.

The storage unit 550 may store service guide information, a file transmitted as an IP datagram, content data, and may store data before and after the decoder 620 decodes the data. The input unit 530 may receive a control command input by the user and output the control command to the controller 600. The display unit 560 may output an audio or video signal output from the controller 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 communication system decoding unit 670 to transmit and receive an interactive channel. The communication system decoding unit 670 may encode a signal to be transmitted through the interactive channel or may decode a signal received from the interactive channel from the communication unit 520. When the communication unit 520 receives a signal through the interactive channel, the communication unit 520 demodulates the signal according to the communication system. When the communication system decoding unit 670 outputs an encoded signal, the communication unit 520 may modulate and transmit the signal. For example, when the communication unit 520 receives the service guide information from the interactive channel and demodulates and outputs the received service guide information, the communication system decoding unit 670 may receive and decode the output. When the communication system decoder 670 obtains service guide information included in the IP datagram, the communication system decoder 670 may include an IP related block included in the system decoder 610. The service guide information decoded by the new system decoding unit 670 is output to the service guide information control unit 630.

After the decoder 620 of the control unit 600 obtains the IP address where the bootstrap information is located from the table information such as INT, the decoder 620 receives the bootstrap information by using the obtained IP address. Bootstrap information received by the service guide information receiving apparatus is received from a broadcast channel or an interactive channel. When the control unit 600 receives the bootstrap information from the broadcast receiver 610 or the communication unit 620, the control unit 600 may receive the service guide information through the broadcast channel or the interactive channel according to the identification information in the bootstrap information. When the control unit 600 obtains the service guide information from the broadcast channel, the control unit 600 may decode the signal through the system decoder 610. If the control unit 600 obtains the service guide information from the broadcast channel, the controller 600 may decode the signal through the communication system decoder 670.

That is, the apparatus for receiving service guide information may receive identification information for determining whether to receive service guide information from a broadcast channel or an interactive channel from the bootstrap information illustrated in FIG. 3. The bootstrap information may include mode information configuring the received service guide information when the service guide information is received from the broadcast channel or the interactive channel.

According to the present embodiment, the service guide receiving apparatus may implement and display the service guide information in consideration of the service guide information receiving mode according to the identification information.

10 discloses an example of a protocol stack that follows when service guide information is delivered. In the case of the protocol stack, if service guide information is transmitted according to the DVB-T / H format 710, the transmitted signal follows a protocol related to a transport stream defined in DVB. According to DVB-H, the transport stream can follow the time slicing rule (725), and if the transport stream is decoded, the transport stream must conform to the multiprotocol encapsulation (MPE) or multiprotocol encapsulation-forward error correction (MPE-FEC) format (729). It becomes a signal. Although not shown in FIG. 10, information based on PSI / SI may be delivered to the transport stream. The transport stream has a signal according to the format 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 through UDP may be in accordance with the RTP format 750, and the content delivered in the form of a file may be in FLUTE / ALC format. Streaming content according to the RTP 750 may be encoded and 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 may be transmitted in a signal layered in units of objects through FLUTE.

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

Bootstrap information including identification information indicating whether service guide information is received in at least one of a broadcast channel and an interactive channel is received (S110). Bootstrap information may be received using an IP address obtained from table information such as INT of a broadcast channel. Bootstrap information may be received from a broadcast channel or an interactive channel. The received bootstrap information may include the information illustrated in FIG. 3.

The service guide information is received from at least one of a broadcast channel and an interactive channel according to the identification information of the bootstrap information (S120).

The service guide information received through the broadcast channel may be demodulated by the OFDM process and then subjected to a system decoding process, which is illustrated in the description of the system decoder of FIG. 8. The service guide information received through the interactive channel exemplifies the description of the communication system decoding unit of FIG. 8.

The embodiment may further include the following step S130.

When receiving the service guide information from the interactive channel, the service guide information is generated and displayed according to the service guide generation mode information of the bootstrap information (S130). Processing of the service guide information received according to the mode information of the bootstrap information is illustrated in the description of the service guide information controller of FIG. 8. Accordingly, when the service guide is received, the browser of the service guide information may be driven to display the service guide information including the channel map information received and stored to the user.

When the service guide information can be received from the interactive channel according to the identification information of the bootstrap information, the bootstrap information includes fragment data for the service guide information received from the broadcast channel and fragment data for the service guide information received from the interactive channel. May include mode information describing a relationship for generating service guide information.

The effects of the embodiment of the service guide receiving method and the service guide receiving apparatus disclosed above are described as follows. According to the disclosed service guide receiving method and service guide receiving apparatus, information on a service can be efficiently obtained.

Claims (8)

A receiving unit for receiving a signal including bootstrap information having identification information indicating whether service guide information is received on at least one of a broadcast channel and an interactive channel, and receiving service guide information according to the identification information; A controller configured to control the receiver to receive the service guide information on at least one of a broadcast channel and an interactive channel according to the bootstrap information received by the receiver, and to display the received service guide information; And And a display unit for displaying service guide information under the control of the controller. The method of claim 1, When the service guide information can be received in the interactive channel, the bootstrap information indicates whether the display unit generates service guide information to be expressed from which information among the service guide information received from the interactive channel and the broadcast channel. The service guide receiving device including the mode information indicating. The method of claim 1, The bootstrap information may include link information of a location where the service guide information is located when the device receives service guide information through an interactive channel. The method of claim 1, And the bootstrap information includes link information of a location where description information about the service guide information is located when the device receives service guide information through an interactive channel. A first receiving step of receiving a signal including bootstrap information having identification information indicating whether service guide information is received in at least one of a broadcast channel and an interactive channel; A second receiving step of receiving the service guide information in at least one of a broadcast channel and an interactive channel according to the bootstrap information; And Service guide receiving method comprising the expressing step of expressing the received service guide information. The method of claim 5, When the service guide information can be received in the interactive channel, the bootstrap information indicates whether the service guide information to be generated from the information of the service guide information received from the interactive channel and the broadcast channel How to receive a service guide containing information. The method of claim 5, And the bootstrap information includes link information of a location where the service guide information is located when the device receives service guide information through an interactive channel. The method of claim 5, And the bootstrap information includes link information of a location where description information about the service guide information is located when the device receives the service guide information through an interactive channel.

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