KR20080107137A - Method of transmitting and receiving service guide information and apparatus for transmitting and receiving service guide information - Google Patents

Abstract

A service guide information transmitting/receiving method and service guide information transmitting/receiving are provided to use contents based on service guide information and obtain the service guide information. First using content information indicates whether the content is possible to be used through an interactive channel before the broadcast. A receiver(510) receives signal including the service guide information and demodulates one or more information among the second contents using information. A controller(600) controls in order to express the service guide information including describing information about the service guide information. An expressing part(560) expresses the service guide information among the first using content information and the second using content information.

Description

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

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

2 is a diagram illustrating an example of providing information on whether to use content according to a schedule among service guide information;

3 is a diagram illustrating service guide information according to a content fragment having a content attribute according to FIG. 2.

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.

8A and 8B illustrate a receiving apparatus for receiving service guide information.

FIG. 9 illustrates an example of a protocol stack to follow when service guide information is delivered.

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

11 is a diagram illustrating an example of displaying service guide information.

The present invention relates to a service guide information transmission and reception method and a service guide information transmission and reception apparatus.

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 transmission and reception method and a service guide information transmission and reception apparatus that can efficiently obtain service guide information and easily use contents.

In order to achieve the above object, the present invention provides a first content usage information indicating whether the content is available through the interactive channel before the broadcast of the content and whether the content is available through the interactive channel after the broadcast of the content. An encoding step of encoding service guide information having at least one of second content usage information, a multiplexing step of outputting a multiplexed signal by multiplexing the encoded service guide information and content data, and modulating and encoding the multiplexed signal It provides a service guide information transmission method comprising a transmission step of transmitting by.

In another aspect, the present invention provides a first content usage information indicating whether the content is available through the interactive channel before the broadcast of the content and the second content indicating whether the content is available through the interactive channel after the broadcast of the content. A receiving step of receiving and demodulating a signal including service guide information having at least one piece of usage information, decoding the demodulated signal, and having service information including the first content usage information and the second content usage information; And a display step of displaying service guide information having at least one of the first content usage information and the second content usage information of the service guide information according to the control. Provides a method for receiving information.

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

The service guide information includes both schedule information for each service that allows the user to select a service, or 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 channel for unidirectional communication without specifying a user during multicast.

The service guide information is a first process (hereinafter referred to as a bootstrap process) of recognizing whether the terminal can use the service guide information or how to obtain the service guide, and a second process of the terminal obtaining and processing the service guide information (hereinafter, Acquisition process, 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 type of A / V, text, image, etc. for the content may be included in the content fragment.

The schedule event fragment includes schedule information about one content of the service. For example, the broadcast time of the content may correspond to this. The furniture fragment includes information related to the purchase of a service that a user can purchase. The aperture channel 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 hierarchical structure, and each of the service guide information is called a fragment unit in the hierarchical structure. 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. Such a transmission and reception system is illustrated in FIGS. 4, 5, 8A and 8B, respectively, and the transmission and reception protocol is illustrated in FIG. 9.

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 the IP address for receiving the bootstrap information of the service guide information from the INT, which is mapping information from the broadcast signal, the terminal uses the program strap number (program_number) on the PMT in which the obtained IP address is defined. Know the packet ID that can be received. If the packet corresponding to the packet ID is encapsulated in the MPE or the like, the terminal may decapsulate the MPE to obtain bootstrap information.

The service guide information transmitted by the bootstrap information 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.

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, if the IP address is in the IP version 4 format, from 224.0.23.14 If you follow IP version 6, you can get bootstrap information from FF0X: 0: 0: 0: 0: 0: 0: 12D.

2 is a diagram illustrating an example of providing information on whether to use content according to a schedule among service guide information. 2 discloses an example of a content fragment, where the content fragment includes metadata about the content. That is, the content fragment includes information that can describe the configuration of the content data and the like. Although the content fragment of FIG. 2 shows an example composed of Extensible Markup Language (XML), it may have another format. For convenience of description, the characteristics of the content fragment according to XML are described here.

The content fragment illustrated in FIG. 2 includes a title, a media title of a content, a service reference, a service reference, a synopsis, keywords, a genre, a content type, a content type, and parental. Elements such as Guidance, Language, CaptionLanguage, SignLanguage, CreditsList, RelateMaterial, Duration, Private Data, etc. Include. Each element may have a type already defined.

Title indicates the name of the content provided by the service guide.

MediaTitle may indicate the type of media representing the title of the content. For example, an image or a sound may be included as the media representing the title of the content. The service reference (ServiceRef) represents the service identifier of the service fragment associated with the content. Synopsis represents summary information in the form of text of content. Keywords represent identifying keyword information of the content provided by the service guide information. Genre represents the genre region of the content. The content type indicates a characteristic of the content. For example, the content type indicates whether the content is a downloaded content, a streaming content, or a content that can be downloaded and streamed. Parental Guidance indicates the parental rating of the content. Language refers to the language served by the content.

Caption Language (CaptionLanguage) represents the language of the caption included in the content, SignLanguage represents language information used as a language code for describing the language used in the content. For example, the language includes a voice language, a caption language, a sign language, and the like. CreditsList represents information about actors, directors, and the like appearing in the content, and RelateMaterial represents information related to the content, such as a website related to the content. The duration represents the presentation length of the content, and the private data is individual information that can be added to the content, and may include information such as copyright.

The content fragment may have attributes such as a content ID, a first content use information prior to air, and a second content use information afterToAir. The contentID indicates an identifier for identifying the content. The first content usage information (priorToAir) is information indicating whether the user can use the identified content before the broadcast through the interactive channel. For example, if the first content usage information (priorToAir) is true, the user may indicate that the content is available through the interactive channel before the broadcast of the content having the property, and if the content is false, the opposite may be indicated. have. The second content use information (afterToAir) indicates whether the user can use the content through the interactive channel if the content has already been broadcasted through the broadcast channel. For example, when the second content use information (afterToAir) is set to true, the user may indicate that the content is available through the interactive channel even after being broadcasted through the broadcast channel.

3 illustrates an example of service guide information according to a content fragment having a content attribute according to FIG. 2. The example of the service guide information of FIG. 3 shows a content schedule for each channel of a time zone. sad movie (9:00 ~ 9:30), news (9:30 ~ 10:30), drama (10:30 ~ 11:00), comic movie (11:00 ~ 12:30), travel (12: 30 to 13:40), happy cook (13:40 to 14:00), and 2 o'clock news (14:00 to 14:30) are assumed to be delivered to the broadcast channel according to the time indicated in parentheses, respectively. .

In the case of sad movie, the first content use information (priorToAir) is true, the second content use information (afterToAir) is also set to true, in case of news, the first content use information (priorToAir) is false, and the second content use information. Assuming (afterToAir) is also set to false. In the case of a happy cook, the first content use information (priorToAir) is set to false, the second content use information (afterToAir) is set to true, and in the case of 2 o'clock news, the first content use information (priorToAir) is set to true. It is assumed that the second content usage information afterToAir is set to false, respectively. If the current time is 12:40, travel of the broadcast contents is broadcast in the illustrated channel. If the user of the terminal wants to watch the sad movie, the sad movie's broadcast time depends on the sad movie content's property (sad movie's first content usage information (priorToAir) is true and second content usage information (afterToAir) is true). Sad movies can be accessed through the interactive channel before or after the broadcast.

If the current time is 13:40, the happy cook is transmitted to the broadcast channel. According to the property of the happy cook (the first content usage information (priorToAir) of the happy cook is false, and the second content usage information (afterToAir) is true), the user of the terminal cannot see the broadcast channel through the interactive channel before the broadcast. After the happy cook is broadcast, you can watch it on the interactive channel.

In the case of news, the user cannot see the news contents through the interactive channel before or after the broadcast, but only the news through the broadcast channel. On the other hand, in the case of 2 o'clock news, the user can see the content through the interactive channel before the broadcast, but the content cannot be seen through the interactive channel after the broadcast.

Therefore, when the service guide information is transmitted and received in XML by setting the first content usage information and the second content usage information in the content fragment of the service guide information as attributes, the availability of the content before and after the broadcasting of the content from the schedule information of the service guide information is implemented. The user can know in advance.

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 and encoder 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 using an IP protocol (casting method), which is transmitted by dividing the video signal, the audio signal, and the data signal in packet units.

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 using a time slicing technique to reduce power consumption. The multiplexed signal is converted to a transport stream and multiplexed with MPEG-2 transport stream packets carrying video or audio signals.

The second encoder 320 may encode service guide information including the first content usage information and the second content usage information illustrated in FIGS. 2 and 3. The service guide information encoded by the first encoder 320 and the second encoder includes broadcast schedule information of contents. The first content use information of the broadcast schedule information of the content indicates whether the user can use the content through the interactive channel before the content related to the first content use information is broadcasted through the broadcast channel. The second content usage information indicates whether the user can use the content through the interactive channel after the content related to the second content usage information is broadcasted through the broadcast channel.

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 may include INT (IP) including mapping information between a packet ID (PID) including an IP datagram encoded by the second encoding unit 320 and an IP address of the IP datagram. / MAC Notification table).

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 packet data encoded by the first encoder 310, the second encoder 320, and the third encoder 330, the modulation and encoding 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. A detailed example of the modulation and coding unit 350 is described in detail with reference to FIG. 7. A detailed example of the modulation and coding unit 350 is described in detail with reference to FIG. 5.

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 421 may encode a transmission signal according to a punctured convolution code, and the inner-interleaving scheme may correspond to a transmission mode of 2k, 4k, and 8k. Depending on the memory usage, either native or in-depth interleaving schemes can 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. 5.

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.

FIG. 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 obtain 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 time slicing technique 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.

8A and 8B are diagrams illustrating a receiving apparatus for receiving service guide information. 8A and 8B, the service guide information receiving apparatus is illustrated as follows. 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 communicator 520 that receives a signal from an interactive channel and transmits a signal to the interactive channel. For example, the channel that the communication unit 520 interacts with may be a wired or wireless channel capable of data communication in both directions.

The broadcast receiver 510 receives, 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 signal frame in a DVB 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 signal received by the broadcast receiving unit 510 or the communication unit 520 includes service guide information. The service guide information may include at least one of the first content usage information and the second content usage information, and the first content usage information may be associated with the user through an interactive channel before broadcasting the related content. Indicates whether or not is available. The second content usage information indicates whether the related content can be used by the user through an interactive channel after the broadcast of the related content.

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

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

8B is a diagram illustrating the system decoder 610 of FIG. 8A in detail.

The system decoder 610 may process a broadcast signal received from the broadcast receiver 510. The system decoder 610 may include an IP decapsulator 611, a user datagram protocol (UDP) decoder 612, an RTP decoder 613, and a file delivery over unidirectional transport protocol (FLUTE) decoder 614. , A container parser 614, a BiM 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. The service guide information decoded by the system decoder 610 includes at least one of first content usage information and second content usage information.

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 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. The content fragment parsed by the container parser 615 may have an attribute according to at least one of first content usage information and second content usage information.

When the service guide information is output in the form of a beam BiM according to the output of the container parser 615, the beam BiM parser 616 decodes the data 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 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 the video data in H.264 format, for example, and the audio decoder may decode the audio data in AAC + format, for example. In addition, the decoder 620 may decode program information / service information in a table format 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 service guide receiving apparatus may receive the bootstrap information using the obtained IP address. 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 may store the received service guide information in the storage 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 the application 635 related to the received or stored service guide information, for example, a browser, to display the service guide information. The service guide information displayed through the browser may include at least one of first content usage information and second content usage information for each content. Accordingly, the user can know whether the content in the service guide information displayed through the browser is available through the interactive channel before or after the broadcast time.

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. When the communication system decoding unit 670 outputs an encoded signal, the communication unit 520 modulates the signal and transmits it. For example, when the communication unit 520 receives the service guide information from the interactive channel, the communication system decoding unit 670 may receive it, decode it, and output it. The signal decoded by the communication system decoding unit 670 is output to the service guide information control unit 630. Therefore, when the service guide information receiving device receives from the table information such as INT, it is possible to obtain the IP address where the bootstrap information is located. The apparatus for receiving service guide information may obtain service guide information through an interactive channel using the obtained IP address, or may receive service guide information through a broadcast channel. Therefore, if the service guide information receiving apparatus receives the service guide information including the first content usage information and the second content usage information, the communication system encoding unit 670 of the service guide information receiving apparatus is connected through an interactive channel. The content can be obtained before or after the broadcast.

9 illustrates 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. 9, 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 service guide information may be transmitted as information on an object basis through FLUTE.

10 is a view showing an embodiment of a method of transmitting and receiving service guide information according to the present invention. An embodiment of a method of transmitting and receiving service guide information according to the present invention with reference to FIG. 10 is as follows.

The service guide information including at least one of the first content usage information and the second content usage information is encoded (S110). The process S110 is illustrated in FIG. 5, and the first content usage information and the second content usage information are illustrated in FIG. 2.

The encoded service guide information is multiplexed with the content data, and the multiplexed signal is modulated and transmitted (S120). An example of a process of multiplexing, modulating, and transmitting service guide information is illustrated in FIGS. 4 and 5.

When the service guide information is received, a signal having service guide information including at least one of the first content usage information and the second content usage information is received and demodulated (S130).

Service guide information including at least one of the first content usage information and the second content usage information is displayed among the received service guide information (S140).

Processes S130 and S140 may refer to FIGS. 8A and 8B. An example in which the service guide information is expressed is illustrated in FIG. 11.

When both the first content usage information and the second content usage information are true for the content expressed by the service guide information, the content may be obtained through an interactive channel before and after the broadcast of the content. In the present embodiment, it is assumed that both the first content usage information and the second content usage information are true, and the first and second content usage information for the displayed content are activated.

When the content is transmitted before the broadcast channel (S150), the user may receive a selection signal for the content (S160). In this case, the user may receive the content selected by the user from the interactive channel (S165), and may store or display the content to be received.

If the content is later than the point in time to be transmitted through the broadcast channel (S150), the user may receive a selection signal for the content (S170). When the content selection signal is received from the user, the user may receive the content selected by the user from the interactive channel (S175), and the content to be received may be stored or displayed.

Unlike the above example, when the logical value of the first content usage information for the content is false, the first content usage information for the content may be deactivated or not displayed on the screen. In this case, the user cannot obtain the content through the interactive channel before broadcasting the content. Similarly, when the second content usage information is displayed on the screen, the user may receive and display the content through the interactive channel after broadcasting the content.

11 is a diagram illustrating an example of displaying service guide information. An example of expressing service guide information with reference to FIG. 11 is as follows. The service guide information includes broadcast schedule information for each content. 11 shows an example in which the first content usage information and the second content usage information are expressed for the content expressed in the broadcast schedule information for each content. In FIG. 11, the first content usage information is indicated by prior, and the second content usage information is represented by after.

The service guide information of channel 10 assumes that AA is transmitted from 10 am to 11 am, BB from 11 am to noon, and CC is transmitted from noon to 1 pm. Although both the first content usage information and the second content usage information are provided in the content AA, only the first content usage information is provided in the content BB, and the second content usage information is provided in the content CC example.

If the first content usage information is true for the content AA, the first content usage information is activated. When activated, a selectable display may appear when the user places a selection tool such as a cursor on the first content usage information. If it is not activated, the selectable display does not appear even if the user places the selection tool on the first content usage information. In the example of FIG. 11, the selectable display of the content usage information is indicated by an arrow.

Accordingly, the user can access or receive the content through the interactive channel before or after the broadcast from the schedule information on the content on the service guide information and view it.

According to the above embodiment, the user obtains the first content usage information and the second content usage information from the service guide information, and obtains information on whether the content related to the information can be received through the interactive channel before and after the broadcast. Can be. Therefore, detailed information on the use of the content can be obtained, and the service can be easily used.

The effects of the above-described service guide information transmission and reception method and service guide information transmission / reception apparatus will be described below. According to the service guide information transmission / reception method and the service guide information transmission / reception apparatus disclosed above, a user can efficiently obtain service guide information and use content based on the service guide information.

Claims (8)

At least one of first content usage information indicating whether the content is available through the interactive channel before the broadcast of content and second content usage information indicating whether the content is available through the interactive channel after the broadcast of the content; A receiver which receives and demodulates a signal including service guide information having information; A controller configured to decode the demodulated signal by the receiver and to display service guide information including description information about the service guide information; And And a display unit for displaying service guide information having at least one of the first content usage information and the second content usage information among the service guide information under the control of the controller. The method of claim 1, And at least one of the first content usage information and the second content usage information is defined in a content fragment of the service guide information. At least one of first content usage information indicating whether the content is available through the interactive channel before the broadcast of content and second content usage information indicating whether the content is available through the interactive channel after the broadcast of the content; An encoding unit for encoding service guide information having information of; A multiplexer for multiplexing the encoded service guide information and content data to output a multiplexed signal; And And a modulation and coding unit for modulating, encoding, and transmitting the multiplexed signal. The method of claim 3, wherein And at least one of the first content usage information and the second content usage information is defined in a content fragment of the service guide information. At least one of first content usage information indicating whether the content is available through the interactive channel before the broadcast of content and second content usage information indicating whether the content is available through the interactive channel after the broadcast of the content; A receiving step of receiving and demodulating a signal including service guide information having information; A control step of decoding the demodulated signal and controlling to display service guide information having the first content usage information and the second content usage information; And And displaying a service guide information having at least one of the first content usage information and the second content usage information of the service guide information according to the control. The method of claim 5, wherein And at least one of the first content usage information and the second content usage information is defined in a content fragment of the service guide information. At least one of first content usage information indicating whether the content is available through the interactive channel before the broadcast of content and second content usage information indicating whether the content is available through the interactive channel after the broadcast of the content; An encoding step of encoding service guide information having information; A multiplexing step of multiplexing the encoded service guide information and content data to output a multiplexed signal; And And a transmission step of modulating, encoding and transmitting the multiplexed signal. The method of claim 7, wherein At least one of the first content usage information and the second content usage information is defined in a content fragment of the service guide information.

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