KR20090002818A - Method of receiving service guide information and apparatus for receiving service guide information - Google Patents

Abstract

A method of receiving service guide information and an apparatus for receiving service guide information are provided to receive service guide information through an interactive channel according to an attribute of the service guide information. Bootstrap information including an attribute of service guide information is received from a broadcast channel(S110). When the attribute of the service guide information is incomplete(S120), it is determined whether the attribute of the service guide information is consistent(S130). When the attribute of the service guide information is inconsistent, the service guide information from a server having complete capability through the interactive channel is received or the service guide information is received from a complimenting server(S135).

Description

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

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 obtaining service guide information efficiently.

In order to achieve the above object, the present invention comprises the steps of receiving bootstrap information including attribute information of service guide information from a broadcast channel, the service guide information received from the broadcast channel according to the attribute of the service guide information is incomplete In one case, receiving list information of service guide information from a server capable of providing service guide information through an interactive channel and receiving service guide information from the server according to the list information of the service guide information. It provides a service guide information receiving method comprising. The present invention also provides a broadcast receiver for receiving bootstrap information and service guide information including property information of service guide information from a broadcast channel, parsing the bootstrap information, and providing a service guide through an interactive channel according to the property information. A controller for outputting a request signal for requesting information, receiving service guide information corresponding to the output signal from the interactive channel, and transmitting a request signal output from the controller through an interactive channel, It provides a service guide receiving apparatus including a communication unit for receiving the service guide information from.

According to the present invention, the service guide information can be received through the interactive channel according to the property of the service guide information, thereby efficiently receiving the service guide information.

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. Herein, an interactive channel refers to a channel capable of bidirectional communication, and a broadcast channel or a broadcast channel refers to a unidirectional communication channel without designating 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, 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. Referring to Figure 1, the structure of the service guide information is as follows.

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. 1 shows a service fragment, a schedule event fragment, a content fragment, a service bundle fragment, a service fragment, a purse channel fragment, and an accumulation acquistion) 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 numbers illustrated above each arrow indicate the number of references for each fragment. For example, 0 ... n means that you can refer to other fragments 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 of A / V, text, and 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.

As such, the service guide information may have a lower unit 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. A system for transmitting and receiving such information is described below.

Meanwhile, as described above, the service guide information may be obtained from the bootstrap information. A process of receiving the bootstrap information of the service guide information will be described below.

In the table information in which one or more sections of the broadcast signal transmitted through a broadcast channel are transmitted to a section, the IP / MAC notification table (INT) indicates the IP address and transport stream of the IP (internet protocol) stream in the transport stream of the broadcast signal. Contains mapping information between PIDs (packet identifiers). When the terminal obtains the IP address for receiving the bootstrap information of the service guide information from the INT that is the mapping information, the terminal may receive the bootstrap information from the program number (program_number) on the PMT in which the obtained IP address is defined. It can be seen. When the packet corresponding to the packet ID is encapsulated in the transmission signal, the terminal may decapsulate the packet to obtain bootstrap information.

2 illustrates an example in which a bootstrap information capable of receiving service guide information in a descriptor format is shown. 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 a descriptor related to obtaining service guide information (denoted as an ESG Access Descriptor), and FIG. 3 illustrates entry information (ESGEntry) parsed from the descriptor of FIG. The descriptor capable of acquiring the service guide information describes a matter related to access to an entry point of the service guide information transmitted on the broadcast channel. Thus, this entry point can be bootstrap information that allows the terminal to receive service guide information.

The service guide information transmitted by the bootstrap information illustrated in FIG. 2 may be transmitted in a stream format based on IP. For example, the service guide information may be transmitted according to Asynchronous Layered Coding / Layered Coding Transport (ALC / LCT) in a FLUTE (File Delivery over Unidirectional Transport) session running on an IP protocol. For example, the service guide information may be transmitted / received according to a file transmission / reception protocol on the IP protocol in the form of an Extensible Markup Language (XML) file, a hypertext markup language (HTML) file, a JPG file, or the like. Examples of protocols through which service guide information may be conveyed are illustrated in detail below.

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. The terminal may parse entry information for receiving service information according to the number of entry information using the descriptor of FIG. 2.

3 is an example illustrating entry information (ESGEntry) for the service guide information illustrated in FIG. 2. The ESGEntryVersion field in the entry information (ESGEntry) of the service guide information is a version of the entry information (ESG Entry) of the service guide information, and indicates whether the descriptor illustrated in FIG. 3 is transmitted only through a broadcast channel or through an interactive channel. Can be represented. For example, the descriptor of FIG. 3 may have a value of 1 when transmitted only through a broadcast channel, and may have a value of 2 when transmitted through an interactive channel.

The ESGEntryLength field represents the length of an ESGEntry in bytes. The ProviderID field represents an identifier of a provider of service guide information. n_o_AccessPoints represents the number of entry points capable of receiving service guide information. The for loop statement parses information about an entry point according to the number of entry points. AccessType may refer to a channel type that can access and receive service guide information. And AccessPointLength represents the length of entry point information according to AccessType.

If the AccessType is 0x01, and the service guide information is received from the broadcast channel, the entry point information for the service guide information received from the broadcast channel is as follows.

When the MultipleStreamTransport field is 1, an IP address is provided through an announcement channel to a session for implementing service guide information, and service guide information is provided at a location indicated by the IP address. 0 indicates that a container for all service guide information is provided in a session for implementing service guide information.

IPVersion6 is a field indicating whether SourceIPAddress and DestinationIPAddress are set according to IP version 6. And it may include two fields (consistentFlag, completeESGFlag) describing the attributes of the service guide information provided by the server providing the service guide information. Detailed description of the two field values will be described later.

Bootstrap information of the service guide information includes a source IP address (SourceIPAddress) and a destination IP address (DestinationIPAddress) operating in a session (for example, a FLUTE session) driving to send and receive service guide information according to the value of the IPVersion6 field. can do. 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 (if (IPversion6) statement). The Port field indicates a port of an IP stream of a session (eg FLUTE session) through which service guide information is transmitted and received, and the TSI field is set to a transport session identifier of a session driving service guide information.

On the other hand, when 0x02 of AccessType, this indicates that service guide information can be transmitted and received through the interactive channel. When the service guide information is transmitted and received through the interactive channel, location information such as the number of servers in which the service guide information is stored and the Uniform Resource Identifier (URI) of each server is included, but is not illustrated in FIG. 3.

As such, the service guide information may be transmitted and received through a broadcast channel or an interactive channel. Now, the properties of the service guide transmitted on any channel (for example, a broadcast channel) that can be set in the bootstrap information of the service guide information and the ability of the server to provide the service guide information through the interactive channel will be described. As follows.

4A to 4B are exemplary diagrams for describing attributes of service guide information.

The capability of the server providing the service guide information may be determined according to the attribute of the service guide information provided through a certain channel, for example, a broadcast channel. The terminal needs to know the property of the service guide information received through the broadcast channel. The consistentFlag and completeESGFlag illustrated in FIG. 3 describe attributes of service guide information provided through a channel from a server.

4A illustrates a case in which the service guide information has a complete attribute. The fact that the service guide information has a complete attribute means that the service guide information AB received by the terminal through the broadcast channel (denoted BC) from the server is the same as the service guide information AB stored in the server. . Therefore, when the terminal receives the service guide information according to the complete attribute, the service guide information received by the terminal includes the same service guide information as the service guide information of the server.

Accordingly, the terminal does not need to separately receive service guide information through another channel (here, an interactive channel).

On the contrary, the fact that the service guide information has an incomplete attribute means that the service guide information received by the terminal through a certain channel, for example, a broadcast channel, includes less information A than the service guide information of the server. it means. Therefore, the terminal receives the remaining service guide information (B) through a separate channel (here referred to as an interactive channel (IA)). 4A illustrates a case where the upper part is complete and the lower part is incomplete.

4B is an exemplary diagram for describing a persistent attribute among attributes of service guide information. 4B illustrates a case where the upper part is consistent and the lower part is inconsistent.

The service guide information provided to the terminal through a channel from the server may have a structure connected to each other as illustrated in FIG. Therefore, if the first fragment A of the service guide information is related to the second fragment B, the service guide information includes the first fragment and the second fragment information, and the information indicating that the two fragments are linked (- Indicated by). That is, the service guide information may include data describing data including actual information and a structure in which the data is connected.

If the terminal receives service guide information having a consistent attribute through a channel, the terminal may be provided with all connection information or link information about the service guide information through the channel. However, even if the terminal receives all the link information of the service guide information, whether or not the received service guide information data is actually provided is another problem. Accordingly, the fact that the property of the service guide information received by the terminal through a channel is consistent means that the service guide information of the channel is received when the terminal has received all the data corresponding to the link information of the service guide information received from the channel. Is defined as consistent.

In contrast, an inconsistent attribute means a case in which some data according to connection information of service guide information received to a terminal through a certain channel is missing. Accordingly, the terminal receives the service guide information data through another channel (interactive channel).

As illustrated above, the complete attribute is an attribute indicating whether or not all service information of a server is provided through a channel, and the constant attribute is provided with all data to be included in service guide information provided through which channel. Property indicating whether or not. Therefore, if the attribute of the service guide information is complete, it is consistent, but not all of the attributes of the service guide information are consistent.

The following describes the ability of the server to provide service guide information.

The capability of the server for providing service guide information through the interactive channel may be determined according to the properties of the service guide provided through the broadcast channel. For example, if an attribute of the service guide information provided from the broadcast channel is included in the entry information of the service guide information, whether the terminal should access a server providing the service guide information through the interactive channel according to the attribute. You can decide whether or not.

The server's ability to provide service guide information through an interactive channel is complete, complimenting, or repairing. 5A through 5C are exemplary diagrams for illustrating the capability of a server to provide service guide information.

5A illustrates the case where the capabilities of the server are complete.

Complete means the server's capability if the server providing the service guide information is able to provide all the service guide information through any channel, for example an interactive channel. Accordingly, the terminal may receive all of the service guide information A. B that can be received from the broadcast channel from a server having a complete capability through the interactive channel.

5B illustrates the case where the capabilities of the server are complimenting.

Complementing is the ability to supplement the service guide information when the service guide information of the terminal that has received the service guide information through the broadcast channel does not fully include the service guide information of the server (only A is received). It means the server's ability to provide B. Therefore, when the terminal receives only A of the service guide information consisting of A and B from the broadcast channel, the terminal may receive the service guide information B through the interactive channel from the server having the complied capability.

5C illustrates the case where the server's capability is repair.

Repair means the server's ability to retransmit the service guide information of the lost portion to the interactive channel when the terminal loses the service guide information received from the broadcast channel. When the terminal does not normally receive A from the broadcast channel among the service guide information consisting of A and B, the terminal may re-receive the service guide information A from the server having the repair capability through the interactive channel.

As illustrated in FIG. 3, in the entry information on the service guide information, the consistent flag may include a context attribute of the service guide information, and the complete flag may include a complete attribute of the service guide information. .

In the example of FIG. 3, when the consistent flag is 0, the service guide information received through the broadcast channel is an inconsistent property, and when 1, the service guide information received through the broadcast channel is a consistent property. Can be represented. When the complete flag is 1, the service guide information received through the broadcast channel may have a complete attribute, and when 0, the complete flag may have an incomplete attribute. And vice versa).

When the consistency flag is 0 and the complete flag is 0 in the entry information of the service guide information received by the terminal, the terminal has an attribute of service guide information received from the broadcast channel inconsistent. It can be seen.

Accordingly, the terminal may receive the service guide information through the interactive channel from the server having the complete capability such that the received service guide information becomes the service guide information having the complete attribute. Alternatively, the terminal may receive service guide information through an interactive channel from a server having the complied capability. To this end, the terminal may receive list information (called a delivery list) of service guide information provided by the server from a server capable of receiving service guide information through an interactive channel. The terminal may determine whether all of the service guide information to be supplemented by the server that receives the service guide information through the interactive channel is provided through the list. When the terminal does not have the service guide information received from the broadcast channel normally, the terminal receives the service guide information that is not normally received through the interactive channel from the server having the repair capability, for example, service guide information in the unit of a fragment or container. Can be received.

If the consistency flag (consistentFlag) is 1 and the complete flag is 0 in the entry information of the service guide information received by the terminal, the terminal is consistent with the attribute of the service guide information received from the broadcast channel. You can see that this property is not complete.

Accordingly, the terminal may receive the service guide information from the server having the complete capability through the interactive channel so that the service guide information is fully provided and complete. Alternatively, the terminal may receive service guide information from a server having the capability of compiling through the interactive channel. To this end, the terminal may receive list information (called a delivery list) of service guide information provided by the server from a server capable of receiving service guide information through an interactive channel. The terminal may determine whether the server to receive the service guide information through the interactive channel has all the service guide information to be supplemented through the list. If the service guide information received from the broadcast channel is not normally provided by the terminal, the terminal may receive service guide information not normally received through the interactive channel from the server having the repair capability.

If the complete flag is 1 regardless of the value of the consistent flag in the bootstrap information received by the terminal, the attribute of the service guide information that the terminal can receive from the entry information of the service guide information is Complete Accordingly, the terminal does not need to receive the service guide information through the interactive channel, but if the service guide information received from the broadcast channel is not normally received, the terminal may receive the service guide information from a server having complete or repair capability. have.

6 illustrates another example of entry information of the illustrated service guide information of FIG. 3. In FIG. 6, the field is the same as that of FIG. 3, but includes a completeESGFlag which is a field indicating an attribute of service guide information that can be received from the entry information. In FIG. 6, completeESGFlag is a field in which 2 bits can be set. For example, when completeESGFlag is 00, this indicates that the attribute of the service guide information received from the broadcast channel is inconsistent. If completeESGFlag is 01, the attribute of the service guide information received from the broadcast channel is consistent but not complete, and if 10, the attribute of the service guide information received from the broadcast channel is complete. Can be an unspecified value. An example of the operation of the terminal according to the attribute of each service guide information has already been described above.

7 is a diagram illustrating an embodiment of a transmitting device for transmitting service guide information. An embodiment of an apparatus for transmitting service guide information will be described below with reference to FIG. 7. In the example of FIG. 7, it is assumed that service guide information is transmitted through a broadcast service.

The broadcast transmission system disclosed in FIG. 7 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.

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 of video, audio, and service guide information. That is, in the example of FIG. 7, 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 multi-protocol encapsulation-forward error correction (MPE-FEC) section data added with a forward error correction code (FEC). By arranging the transmission signal by the MPE-FEC scheme, it is possible to improve the carrier-to-noise (CN) ratio of the transmission signal. MPE-FEC data including FEC or MPE data without FEC may include transmission data in an IP data format.

The second encoding unit 320 may encode the service guide information in the IP datagram format. The second encoder 320 may encapsulate the IP datagram including the service guide information into the MPE, and then multiplex it with a time slicing technique to reduce power consumption. The multiplexed signal can be converted to a transport stream and multiplexed with MPEG-2 transport stream packets carrying video or audio signals.

The third encoder 330 may encode multiplexed information of packets encoded by the first encoder 310 or the second encoder, for example, stream packets 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 bootstrap information. Bootstrap information at a location according to the information of the IP address includes a field indicating a complete / consistent attribute, which is an attribute of service guide information encoded by the second encoding unit 320 as illustrated in FIGS. 3 and 6. can do.

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 transmission scheme such as an ATSC scheme and an ISDB-T scheme according to a DMB scheme, a DVB-H scheme, or a VSB modulation scheme may be used. Can be used.

FIG. 8 is a diagram illustrating the modulation and coding unit disclosed in FIG. 7. In FIG. 8, 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. For example, one symbol includes 6817 carriers in 8k mode, which is a transmission 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. 8 is disclosed in FIG. 9.

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. Accordingly, the encoded service guide information may be transmitted according to the example of the transmitting apparatus of FIG. 8.

9 is a diagram illustrating signal arrangement according to a result of the frame forming unit forming the frame in the example of FIG. 8. In FIG. 9, Tu denotes the number of usable subcarriers, Dt denotes the distance between distributed pilots on the time axis, and Df denotes 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. 9 shows the signal formed by the frame forming unit up to the position of the pilot 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 in this way, the channel compensation can be adaptively performed according to the state of the reception channel upon receiving the signal.

10 illustrates an example in which a broadcast program, content, data, and the like are transmitted through a channel. According to the transmission apparatus disclosed in FIGS. 7 and 8, 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.

11 and 12 illustrate a receiving apparatus for receiving service guide information. An apparatus for receiving service guide information will be described below with reference to FIGS. 11 and 12. 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 selecting a broadcast signal received in the DVB-H scheme and a demodulator for demodulating the broadcast signal in the 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 the service guide information. The bootstrap information includes attribute information of service guide information as illustrated in FIGS. 3 and 6.

The communication unit 520 may transmit and receive a signal through an interactive channel capable of bidirectional communication. When the communication unit 520 receives the signal through the interactive channel, the received signal is demodulated in consideration of the modulation method of the communication system, and when the communication system decoding unit 670 outputs the encoded signal, The output signal can be modulated and transmitted according to the modulation scheme. For example, the communication unit 520 outputs a signal to access the server when the control unit 600 wants to receive the service guide information from the interactive channel according to the bootstrap information from a server having complete or compliing capability. In addition, the server may receive service guide information transmitted from the server.

The controller 600 may include a system decoder 610, a decoder 620, a service guide information controller 630, and a communication system decoder 670. The controller 600 may control the surrounding functional blocks illustrated in FIG. 11, for example, the receiver, the input unit 530, the storage unit 550, the display unit 560, and the like, and may process a control command received from the user. have.

The system decoder 610 may decode the received signal in consideration of an encoding method of a transmission / reception system of a signal received by the broadcast receiver through a broadcast channel. When the broadcast receiver 510 demodulates and outputs a broadcast signal, the system decoder 610 may obtain a file including service guide information by decoding the output signal. The system decoder 610 may obtain the above information from a signal including the bootstrap information included in FIGS. 3 and 6 and service guide information received through a broadcast channel, for example, a signal according to a DVB-H system. The system can be decrypted. A detailed example of the system decoding unit 610 will be described in detail with reference to FIG. 12.

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. For example, when the communication unit 520 receives a signal including the service guide information from the interactive channel, demodulates it, and outputs the signal, the communication system decoding unit 670 decodes the signal to service the service guide information and the related signal. The information may be output to the guide information controller 630 or the decoder 620. The communication system decoding unit 670 may encode or decode a signal in an IP datagram format. For example, the communication system decoding unit 670 receives a signal demodulated by the communication unit 520, decodes the data in the IP datagram format, or encodes and outputs the signal in the IP datagram format to the communication unit 620. Can be. For example, the service guide information receiving apparatus completes and completes through an interactive channel according to the attribute of the service guide information to be received from the bootstrap information illustrated in FIGS. 3 and 6 of the service guide information received from the broadcast channel. A signal to be output to the server may be encoded to receive the service guide information from the server of any one of the server having the complementing and repairing capability.

The decoder 620 may decode the video, audio and data information decoded by the system decoder 610 and the communication system decoder 670 according to the system. The decoder 620 may include a video decoder, an audio decoder, and a data decoder. The video decoder may decode and output video data in H.264 format, for example, and the audio decoder may decode audio data in AC-3 and 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 a signal based on table information such as a program associate table (PAT), a program map table (PMT), a network information table (NIT), etc. from the signal decoded by the system decoder 610, The broadcast signal according to the data broadcast can be decoded. 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. When the decoder 620 parses the INT and obtains an IP address from the bootstrap information of the service guide information, the decoder 620 may output the IP address to the service guide information controller 630. Therefore, the service guide receiving apparatus can obtain the service guide information from the broadcast channel or the interactive channel using the IP address. In this case, examples of bootstrap information parsed by the decoder 620 are illustrated in FIGS. 3 and 6. For example, the bootstrap information received through the broadcast channel may include at least one of complete or consistent information, which is attribute information of the service guide information.

The service guide information controller 630 receives bootstrap information decoded by the system decoder 610 or the communication system decoder 620, and the service guide information receiving apparatus receives the service guide information by using the bootstrap information. You can do that. For example, the service guide information controller 630 may allow the system decoder 610 to receive service guide information from a broadcast channel or the communication system decoder 670 according to the bootstrap information received by the system decoder 610. It may be controlled to receive the service guide information from the interactive channel. If the service guide information device receives the service guide information from the interactive channel according to the attribute of the service guide information of the bootstrap information illustrated in Figs. 3 and 6, the communication system encoding unit 620 provides a service through the interactive channel. Encodes and outputs a signal that can be accessed by the server that stores the guide information. The communication unit 520 may receive the service guide information from a server having a complete capability or a compiling capability by modulating the signal through an interactive channel and outputting the modulated signal.

The service guide information controller 630 may include a controller 613, a channel map storage 633, and a browser driver 635. 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 control the session and control the browser driver 635 for driving an application to display the received or stored service guide information.

The apparatus for receiving service guide information may store the received service guide information in the storage unit 550. 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 service guide information controller 630 may output the service guide information as an image and sound through the display unit 560. Therefore, a user may download a file, provide a web service, or receive service guide information through an application for service guide information.

12 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 615, a beam parser 616, and an XML parser 617.

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 UDP (user datagram protocol) decoder 612 may decode content data transmitted in real time from the IP decapsulated payload according to the user datagram protocol (UDP). The RTP decoding unit 613 may output the content data encoded so that the coding rate is controlled by the RTP control protocol (RTP control protocol) for the content data decoded by the user datagram protocol (UDP) decoding unit 612. 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 616.

If the communication system decoding unit 670 decodes the received signal to display the service guide information, the communication system decoding unit 670 transmits the service guide information file (for example, HTTP) in the IP datagram according to a protocol such as HTTP. For example, an XML file).

FIG. 13 illustrates an example of a protocol stack that is followed when service guide information or bootstrap information of service guide information is delivered to a terminal. In FIG. 13, the left side is a protocol stack according to a broadcast network, and the right side is a protocol stack according to an interactive network.

First, a protocol according to a broadcast network will be described.

For example, if service guide information is transmitted according to the DVB-T / H format, the transmitted signal follows a protocol related to MPEG-2 TS (Transport Stream).

The transport stream may follow a time slicing rule, and when the transport stream is decoded, the transport stream may be a signal according to a multiprotocol encapsulation (MPE) or multiprotocol encapsulation-forward error correction (MPE-FEC) format. Information according to PSI / SI may be delivered to the transport stream.

The transport stream contains signals in the form of IP datagrams. The data according to the IP datagram follows the protocol of UDP 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, and content delivered in the form of a file may be in FLUTE / ALC format. Streaming content according to RTP 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, a Session Description Protocol (SDP), and the like. XML (eXtensible Markup Language) is an object-oriented language, and service guide information may be included and transmitted in an object unit through FLUTE.

When service guide information is received through the interactive channel, the physical layer and the data link layer of the signal received through the interactive channel may use a scheme according to a communication system. The example of FIG. 13 illustrates a communication system such as a global system for mobile telecommunication (GSM), a general packet radio service (GPRS), a universal mobile telecommunications system (UMTS), and the like.

The service guide information transmitted according to the UDP format among the protocol formats according to the IP datagram can be received as a file according to HTTP. Multimedia services such as video / audio may be expressed according to RTP. For reference, a voice service or a text service according to a communication system may be located on the data link layer with a corresponding protocol stack (indicated by SMS and Voice in FIG. 12).

14 is a view showing an embodiment of a method of receiving service guide information according to the present invention. An embodiment of a method of receiving service guide information according to the present invention will be described with reference to FIG. 14.

Bootstrap information including the property of the service guide information is received from the broadcast channel (S110).

Bootstrap information may be received using an IP address obtained from table information such as INT of a broadcast channel. The received bootstrap information may include an attribute of service guide information received through a broadcast channel as illustrated in FIGS. 3 and 6.

If the above attribute of the service guide information is incomplete (S120), it is determined whether the attribute of the service guide information is consistent (S130).

If inconsistent, the service guide information may be received from a server having a complete capability through the interactive channel, or the service guide information may be received from the completed server (S135). If there is a loss in the service guide information received from the broadcast channel, the service guide information may be received from the server having the repair capability through the interactive channel.

If consistent, service guide information may be received from a server having a complete capability through the interactive channel, or service guide information may be received from a complied server (S145). In the case of S145, the service guide information received in the step S135 and the contents received are different. If there is a loss in the service guide information received from the broadcast channel, the service guide information may be received from the server having the repair capability through the interactive channel.

In the case of steps S 135 and S 145, the list information of the service guide information for receiving the service guide information from the server connected to the interactive channel may be first received before receiving the service guide information from the interactive channel.

If the attribute of the above service guide information is complete (S120), it is determined whether there is a loss in the service guide information received from the broadcast channel, and if there is a loss in the service guide information, the service guide information is received from a server having the complete capability. Alternatively, service guide information may be received from a server having a repair capability (S125).

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

2 is a diagram illustrating bootstrap information capable of receiving service guide information as an example of a descriptor format;

3 is a diagram illustrating an example of entry information (ESGEntry) for service guide information;

4A to 4C are exemplary diagrams for describing attributes of service guide information.

5A-5C are exemplary diagrams for illustrating the capability of a server to provide service guide information.

FIG. 6 is a diagram illustrating another example of entry information of the service guide information illustrated in FIG. 3. FIG.

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

FIG. 8 is a diagram illustrating the modulation and coding unit disclosed in FIG. 7. FIG.

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

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

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

FIG. 12 illustrates the system decoding unit of FIG. 11 in detail.

13 illustrates an example protocol stack.

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

Claims (5)

Receiving bootstrap information including attribute information of service guide information from a broadcast channel; Receiving list information of service guide information from a server capable of providing service guide information through an interactive channel when the service guide information received from the broadcast channel is incomplete according to the property of the service guide information. ; And And receiving service guide information from the server according to the list information of the service guide information. The method of claim 1, In the step of receiving service guide information from the server, the server receives service guide information having complete capability, complimenting capability, and repair capability with respect to service guide information received from a broadcast channel. Way. The method of claim 1, The attribute information of the service guide information is either complete or incomplete, and in the case of the incomplete, the service guide information receiving method is any one of the consistent and the inconsistent. . A broadcast receiver configured to receive bootstrap information and service guide information including attribute information of service guide information from a broadcast channel; A control unit for parsing the bootstrap information, outputting a request signal for requesting service guide information through an interactive channel according to the attribute information, and receiving service guide information corresponding to the output signal from the interactive channel; And And a communication unit which transmits a request signal output from the control unit through an interactive channel and receives the service guide information from the interactive channel. The method of claim 3, wherein The attribute information of the service guide information is either complete or incomplete, and in the case of the incomplete, service guide information receiving method.

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