KR20070113611A - Digital broadcast signal and apparatus and method for processing the signal - Google Patents

Abstract

The present invention provides a digital broadcast signal and an apparatus and method for processing the signal. The digital broadcast signal according to the present invention includes a synchronization channel (SYNC), a fast information channel (FIC), and a main service channel (MSC). The FIC may include a disaster message for disaster broadcasting, and the disaster message may include version related information or version related information and disaster end time related information. In this case, the version-related information includes information indicating a message identification and / or version of the corresponding disaster message, and the disaster end time related information includes information indicating a disaster end time and the information. It is preferable to include the information which shows the presence or absence of the information which shows the disaster end time. Therefore, according to the present invention, it is not necessary to process all the received disaster messages, thereby increasing the efficiency of the receiver system, and not only displaying all the disaster messages to the user but also always displaying the latest information so that the same message or the already By redisplaying past disaster messages, you can avoid confusion or the loss of digital broadcasts.

Description

Digital broadcast signal and apparatus and method for processing the signal {Digital broadcast signal and apparatus and method of processing the signal}

1 illustrates a structure of a transmission frame in a digital multimedia broadcasting transmission system in accordance with the present invention.

2 illustrates an example of a structure of a digital multimedia broadcasting service in connection with the present invention.

FIG. 3 illustrates an example of a transport frame structure including disaster information in connection with the present invention. FIG.

4A illustrates an example of a disaster message format that includes disaster version related information in accordance with the present invention.

4B illustrates an example of a disaster message format including disaster version related information and disaster end time related information according to the present invention.

5 is a block diagram illustrating an example of an apparatus for receiving disaster information according to the present invention;

6A is a flowchart illustrating an example of a method of processing a digital broadcast signal including disaster version related information according to the present invention.

6B is a flowchart illustrating an example of a method for processing a digital broadcast signal including disaster version related information and disaster end time related information according to the present invention.

* Explanation of symbols for the main parts of the drawings

501: broadcast receiver 502: broadcast demodulator

503: third decoding unit 504: broadcast signal processing unit

505: Display unit 506: First decoding unit

507: Channel map 508: Second decoder

509: control unit 510: storage unit

The present invention relates to a digital broadcast signal and an apparatus and method for processing the signal.

The current broadcasting environment is rapidly changing from analog broadcasting to digital broadcasting. Due to this change, users can receive various information as well as multimedia broadcasting through digital broadcasting.

For example, there may be a disaster broadcasting service for digital multimedia broadcasting. Disaster broadcasting as described above is an emergency and very important service for the user.

Therefore, a device capable of receiving digital multimedia broadcasting should be able to service the disaster broadcasting.

In this case, the apparatus capable of serving the disaster broadcast may receive the disaster information from the broadcast signal according to the transmission protocol of the digital broadcast, display the received disaster information and deliver it to the user. In the following description, a disaster information receiving apparatus generally includes not only a broadcast receiving apparatus but also a dedicated terminal for receiving disaster information.

In the disaster broadcasting for digital broadcasting, since the disaster broadcasting is critical and very important information for the broadcast receiver user, continuous and repetitive transmission and reception of this information is required.

However, the current disaster broadcast has no information on how many disaster messages exist and whether the transmitted disaster message is the same as the previously received disaster message, so the receiver must process it again and display it to the user.

Therefore, there is a problem that the efficiency of the receiver is lowered, and the user may experience inconvenience due to the same message.

In addition, there is a message indicating that a disaster has occurred, but there is no information for knowing when the disaster is terminated, so that the user may not know at what time the disaster will end.

Accordingly, in order to solve the above problems, an object of the present invention is to provide a digital broadcast signal including a disaster message including version-related information or version-related information and disaster end time-related information.

Another object of the present invention is to provide a receiver and a method capable of receiving and processing the digital broadcast signal.

Accordingly, in order to achieve the above object, an example of a digital broadcast signal according to the present invention comprises a synchronization channel (SYNC), a fast information channel (FIC) and a main service channel (MSC), and the FIC is used for disaster broadcasting. Including a disaster message, the disaster message is characterized in that it contains version-related information.

In this case, the version-related information may include information indicating a message identification and / or version indicating a corresponding disaster message.

The information representing the message ID preferably includes an identifier for uniquely identifying the corresponding disaster message.

In addition, the information indicating the version preferably includes a version number that can indicate whether or not the corresponding disaster message has changed.

The disaster message is preferably transmitted using a fast information data channel (FIDC) in the FIC.

In another example of the digital broadcast signal according to the present invention, the broadcast signal is composed of SYNC, FIC and MSC, the FIC includes a disaster message for the disaster broadcast, the disaster message is related to version information and disaster end time It is characterized by including the information.

At this time, the version-related information preferably includes information indicating the message ID and / or version indicating the disaster message.

The information indicating the message ID preferably includes an identifier for uniquely identifying the corresponding disaster message.

In addition, the information indicating the version preferably includes a version number that can indicate whether the corresponding disaster message has changed.

The disaster end time related information preferably includes information indicating a disaster end time and information indicating whether or not there is information indicating the disaster end time.

In addition, the information indicating the disaster end time is preferably any one of information on the time when the disaster is represented by the disaster message and information on the time when the disaster message is valid.

The disaster message is preferably transmitted using the FIDC in the FIC.

According to the present invention, an example of a method of processing a digital broadcast signal includes: receiving the digital broadcast signal; Parsing a disaster message in an FIC of the received broadcast signal; Determining whether a disaster message having the same message ID information as the message ID information included in the parsed disaster message has been received; When the disaster message having the same message ID information as the parsed message ID information is received, comparing the version number information included in the parsed disaster message to be greater than the version number information of the received disaster message; And if the version number information included in the parsed disaster message is greater than the version number information of the received disaster message, updating and displaying the parsed disaster message. It is done.

In this case, if the disaster message having the same message ID information as the parsed message ID information is not received in the determining, the method may further include storing and displaying the disaster message.

And disabling the parsed disaster message if the version number information included in the parsed disaster message is equal to or less than the version number information of the received disaster message. It is preferable that it further comprises.

According to another aspect of the present invention, there is provided a method of processing a digital broadcast signal, including: receiving the digital broadcast signal; Parsing a disaster message in an FIC of the received broadcast signal; Determining whether a disaster message having the same message ID information as the message ID information included in the parsed disaster message has been received; When the disaster message having the same message ID information as the parsed message ID information is received, comparing the version number information included in the parsed disaster message to be greater than the version number information of the received disaster message; Updating and displaying the parsed disaster message if the version number information included in the parsed disaster message is greater than the version number information of the received disaster message; And comparing the information on the disaster end time included in the parsed disaster message with the information on the time of the current system, and if the information on the disaster end time is greater than the information on the time of the current system as a result of the comparison, the stored information. And removing the disaster message.

In this case, if the disaster message having the same message ID information as the parsed message ID information is not received in the determining, the method may further include storing and displaying the disaster message.

And in the comparing process, ignoring the parsed disaster message if the version number information included in the parsed disaster message is less than or equal to the version number information of the received disaster message. It is preferable to make.

The removing may further include determining whether information on the disaster end time exists before comparing the information on the disaster end time and the information on the time of the current system.

One example of a digital broadcast receiver according to the present invention includes a broadcast receiver for receiving a broadcast signal including version related information in a disaster message for disaster broadcast; A broadcast demodulator for demodulating the received broadcast signal; A first decoder which decodes an FIC among the demodulated broadcast signals; A second decoder which decodes the disaster message in the FIC decoded by the first decoder; A storage unit for storing the disaster message decoded by the second decoder; A display unit displaying a disaster message decoded by the second decoder; And a controller for controlling to ignore, store, and / or display the disaster message decoded by the second decoder.

In this case, the control unit may determine whether or not a disaster message corresponding to the message ID information included in the version related information decoded by the second decoder is received.

The controller determines that the version information included in the version related information decoded by the second decoder is greater than the version information included in the received disaster message when the disaster message matching the message ID information is received. It is desirable to compare whether it is large.

In addition, when the version information is greater than the version information of the received disaster message, the controller controls to store and display the parsed disaster message.

The controller may be configured to ignore the parsed disaster message if the version information is the same as or less than the version information of the received disaster message.

In addition, the controller may control to store and display the parsed disaster message when the disaster message corresponding to the message ID information is not received.

Another example of a digital broadcast receiver according to the present invention includes a broadcast receiver for receiving a broadcast signal including version related information and disaster end time related information in a disaster message for disaster broadcasting; A broadcast demodulator for demodulating the received broadcast signal; A first decoder which decodes an FIC among the demodulated broadcast signals; A second decoder which decodes the disaster message in the FIC decoded by the first decoder; A storage unit for storing the disaster message decoded by the second decoder; A display unit displaying a disaster message decoded by the second decoder; And a controller for controlling to ignore, store, and / or display the disaster message decoded by the second decoder.

In this case, the control unit may determine whether or not a disaster message corresponding to the message ID information included in the version related information decoded by the second decoder is received.

The controller determines that the version information included in the version related information decoded by the second decoder is greater than the version information included in the received disaster message when the disaster message matching the message ID information is received. It is desirable to compare whether it is large.

In addition, when the version information is greater than the version information of the received disaster message, the controller controls to store and display the parsed disaster message.

The controller may be configured to ignore the parsed disaster message if the version information is the same as or less than the version information of the received disaster message.

In addition, the controller may control to store and display the parsed disaster message when the disaster message corresponding to the message ID information is not received.

The controller may compare whether the information indicating the disaster end time included in the disaster end time related information parsed by the second decoder is greater than the information indicating the time of the current system.

In addition, when the information indicating the disaster end time is greater than the information indicating the time of the current system, the controller controls the parsed disaster message to be ignored because it is not valid.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings. In addition, the terminology used in the present invention was selected as a general term widely used as possible now. However, in certain cases, the applicant arbitrarily selected a term, and in this case, the meaning is described in detail in the corresponding part. Therefore, the terms used in the present invention should be understood as meanings of the terms rather than simply names of the terms.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In this case, in describing the present invention, (1) a digital broadcast signal including a disaster message including version related information or version related information and disaster end time related information, and (2) a digital broadcast receiver for processing the digital broadcast signal; And (3) divided into a method of processing the digital broadcast signal.

In addition, in the following description of the present invention, "disaster broadcasting" in the present specification refers to quickly transmitting / receiving useful information when various disasters occur or are likely to occur in transmitting and receiving digital multimedia broadcasting.

Therefore, the disaster broadcasting service for the digital multimedia broadcasting should be dispatched and received quickly and displayed to the user in preference to other additional services.

(1) Digital broadcast signal including disaster message including version related information or version related information and disaster end time related information

First, referring to the digital multimedia broadcasting transmission system for transmitting a digital broadcast signal including a disaster message for disaster broadcasting in connection with the present invention, Figure 1 is a transmission frame (transmission) in a digital multimedia broadcasting transmission system in accordance with the present invention The structure of the frame) is shown.

In the digital broadcast transmission system, a transmission frame is composed of three channels: a synchronization channel (SYNC), a fast information channel (FIC), and a main service channel (MSC).

SYNC is used internally in the transmission system for basic demodulator functions such as transmission frame synchronization, automatic frequency control, channel state estimation and transmitter identification.

The MSC is composed of Common Interleaved Frames (CIFs) and can support two transmission modes, a stream mode and a packet mode. The MSC is also interleaved in a time domain that is individually convolution coded and divided by the number of sub-channels having equal or unequal error protection. channel).

The FIC is described in detail in the relevant section in connection with the present invention, and is omitted here.

Next, a structure in which a transmission frame including data such as a disaster message related to the present invention is serviced by the digital multimedia broadcasting transmission system will be described. An example of the structure is shown.

Hereinafter, the structure of the digital multimedia broadcasting service in connection with the transmission frame structure of FIG. 1 will be described.

One ensemble included in the MSC may consist of at least one or more service (s), and each service may consist of at least one or more Service Component (SC) (s). In addition, each service component (SC) is transmitted through a sub-channel.

In this case, the service refers to an output selectable by the user, and the output refers to an audio, video or data service.

In the above description, the service component SC refers to a part of a service accompanying the audio, video, or data. In addition, each service component (SC) is linked by multiplex configuration information (MCI) and is carried in a sub-channel or a fast information data channel (FIDC).

In the context of the present invention, a disaster message for disaster broadcasting needs fast delivery due to the nature of the information. Therefore, the disaster information is preferably included in the FIC to transmit.

In this case, the FIC includes an MCI including detailed information on a service, service components, sub-channels, and a connection state between them, a service information (SI) which is auxiliary information about services, and a dedicated part of the FIC. It includes information such as paging, traffic message channel (TMC) and FIDC available for services such as Emergency Warning Systems (EWS) in connection with the present invention.

Hereinafter, the FIC including a disaster message for disaster broadcasting according to the present invention will be described.

The FIC is composed of fast information blocks (FIBs), and each FIB may have 256 bits. The FIB consists of a data field of 30 bytes and a CRC field of 16 bits.

In this case, the data field is composed of one or more FIG (Fast Information Groups), an end marker that is a special FIG, and a portion processed by padding to complete the data field.

The FIG is composed of a header and a data field, and the header includes type of FIG and subsequent length information of the data field.

At this time, in connection with the present invention, the disaster message for the disaster broadcast may use the extension type 2 (hereinafter FIG 5/2) field of FIG.

Hereinafter, the structure of a transport frame including a disaster message for disaster broadcast in detail in connection with the present invention, FIG. 3 illustrates an example of a structure of a transport frame including a disaster message in accordance with the present invention. .

The FIG may include a header and a data field as described above, and the data field may include a D1, D2, TCId, and TYPE 5 field.

The D1 field is currently a reserved area, and if the value of the D2 field is '0', the subsequent Type 5 field is treated as padding, and the value of the D2 field is '1'. The Type 5 field that follows may contain a disaster message according to the present invention.

The TCId field is used to distinguish eight different service components that can be transmitted using the same extension number.

The extension field may define a type 5 field to follow. When the value of the extension field is '2' in relation to the present invention (FIG 5/2), the disaster according to the present invention may be applied to the following type 5 field. The message can be defined.

The following describes the disaster message for disaster broadcasting.

At this time, the disaster message according to the present invention is characterized in that it includes version related information or the version related information and the disaster end time related information.

The version-related information preferably includes identifier information for uniquely distinguishing each disaster message transmitted. In addition, the version-related information preferably includes version information indicating whether the transmitted disaster message has changed.

The disaster end time related information may include information indicating whether the disaster end time information and the disaster end time information exist. In addition, the disaster end time information is a concept including the case of indicating the information on the actual disaster end time of the disaster represented by the transmitted disaster message and the case of indicating the time information on how long the transmitted disaster message is valid.

In addition, as described above, in the present invention, it is preferable that the disaster message includes only the version related information or includes the disaster end time information together with the version related information. Alternatively, the disaster message may include only disaster end time information.

Since the disaster message for the disaster broadcast is defined in a certain data format and is included in a transmission frame and transmitted, a data format constituting the disaster message will be described. FIG. 4A shows a disaster message including version related information according to the present invention. 4B illustrates an example of a data format for configuring a disaster message including version related information and disaster end time related information according to the present invention.

First, look at Figure 4a as follows.

As described above, the version related information according to the present invention includes message ID information and version information.

The message ID information is 16-bit identifier information that can uniquely identify each disaster message. That is, the message ID information is an identifier that can uniquely distinguish each disaster message transmitted by the transmission frame. Therefore, according to the present invention, it is possible to know how many disaster messages are included in the transmission frame by defining information that can uniquely distinguish each disaster message as described above.

The version information defines a version number of the corresponding disaster message for each disaster message distinguished by the message ID information, and can be expressed in total by 256 by 0 to 255 by assigning 8 bits. In the example of FIG. 4A, 256 identifiers are assigned by allocating 8 bits, but the present invention is not limited thereto.

As described above, according to the present invention by defining version information, it is possible to define whether the disaster message is the same message or updated message as the received disaster message for the transmitted disaster message.

That is, by defining the message ID information and the version information and transmitting the disaster message, it is possible to know whether a disaster message having the same message ID as the specific message ID of the transmitted disaster message has been received. When the disaster message having the same message ID as the transmitted disaster message is received, the validity of the transmitted disaster message is determined by comparing the version number of the transmitted disaster message with the version number of the received disaster message. can do.

Therefore, it is preferable that the receiver stores only the valid disaster message, not all the disaster messages which are determined and received as described above, in a storage device such as a database.

Therefore, including the version-related information in the disaster message for disaster broadcasting can increase the efficiency of the receiver system. In addition, users can always display only the latest information by displaying only the newly updated information instead of displaying all the disaster messages so that users cannot watch the confusion or digital broadcasts by displaying the same message or the past disaster message again. Etc. can be avoided.

In addition, according to the present invention, it is possible to use the database to utilize the message ID information and version information defined above, it is possible to represent all the list of the received disaster message and search is possible.

Disaster type information can be defined in code form, which means the type of disaster issued by the disaster dispatcher.

The disaster announcement time information may mean the date and time when the disaster dispatcher issued the disaster. In this case, the time information may be represented by using a Modified Julian Date (MJD) or Universal Time Coordinated (UTC) code.

The disaster area type information defines the type of disaster area code used for the disaster message. It is preferable that only one area type is used for one disaster message.

The disaster area number information may mean the number of disaster areas to receive a disaster message.

The disaster area length information may mean the number of bytes of a disaster area code represented by the disaster area format. In this case, the length of one disaster area code may be defined separately according to each type.

The disaster area information may mean an area where a disaster message should be received. That is, it may mean a disaster area code defined in the disaster area type. At this time, the disaster area information should be fixed in the length of the disaster area code for each type.

Short information may indicate additional information such as text information and link information.

Cyclic redundancy check (CRC) information is the disaster message CRC is calculated by the entire message.

Next, FIG. 4B is explained.

In this case, FIG. 4B further includes the disaster end time related information in FIG. 4A. Hereinafter, for the convenience of description, a description of a part overlapping with the description of FIG. 4A is used for this purpose. I will focus on the relevant information.

As described above, the disaster end time-related information preferably includes information indicating whether the disaster end time information and the disaster end time information is present.

The disaster end time information includes two cases.

First, the disaster end time information indicates the actual disaster end time of the disaster indicated by the transmitted disaster message, and second, the disaster end time information includes the time information on how long the transmitted disaster message is valid. Concept.

As shown in FIG. 4B, the end flag defines whether or not the disaster end time information according to the present invention exists as described above, and allocates 1 bit. Accordingly, when the end flag is '0', it may be defined that the following disaster end time information does not exist. When the end flag is '1', it is defined that the following disaster end time information exists. can do.

Therefore, when the end flag is '1', it will be necessary to review the following disaster end time information.

The disaster end time information is time information defined to express the above two concepts. For this purpose, the disaster end time information may be represented using MJD (Modified Julian Date) or UTC code used in the disaster time information. Alternatively, a time stamp, UTC, and global positioning system (GPS) time information may be used to define the disaster end time information.

(2) a digital broadcast receiver for processing the digital broadcast signal

5 is a block diagram illustrating an example of an apparatus for receiving disaster information configured according to the present invention. Referring to Figure 5 describes the operation of the disaster information reception according to the present invention. FIG. 5 illustrates an example of an apparatus for receiving disaster information capable of receiving and processing a disaster broadcast for digital multimedia broadcasting.

The disaster information receiving apparatus according to the present invention includes a broadcast receiver 501, a broadcast demodulator 502, a third decoder 503, a broadcast signal processor 504, a display 505, and a first decoder 506. The channel map 507 may include a second decoder 508, a controller 509, and a storage 510.

The broadcast receiver 501 may receive a broadcast signal according to digital broadcast. The digital broadcast signal may include both terrestrial and satellite digital multimedia broadcast signals.

The broadcast demodulator 502 may demodulate the received digital broadcast signal according to a modulation scheme. For example, in the case of terrestrial digital multimedia broadcasting, since the signal is modulated and transmitted in an orthogonal frequency division multiplexing (OFDM) scheme, the broadcast demodulator 502 may demodulate the broadcast signal in the reverse order of the OFDM modulation scheme.

The third decoder 503 may decode and output the demodulated broadcast signal according to the protocol of the broadcast signal and decode the MSC including the broadcast service data.

The broadcast signal processor 504 may process data included in the decoded and output MSC. Alternatively, the alarm sound or text received from the second decoder 508 can be processed.

The display unit 505 may display an audio broadcast or a multimedia broadcast according to a format (or format) of data processed and received by the broadcast signal processor 504.

The first decoder 506 may decode the FIC, which is fast channel information, and may output and store MCI (Multiplex Configuration Information) information including information related to a service from the FIC to the channel map 507. The first decoder 506 transmits the FIDC including the version related information or the disaster message including the version related information and the disaster end time related information to the second decoder 508 according to the present invention in the decoded FIC. You can print

The second decoder 508 may receive and decode the FIDC from the first decoder 506. That is, the second decoder 508 may decode the FIDC to obtain a disaster message, and output the decoded disaster message to the storage 510.

Accordingly, the storage unit 510 stores the disaster message according to the present invention output from the second decoder 508. In this case, the storage unit 510 is the same as a memory capable of storing data and includes a database.

In addition, in storing the disaster message, the storage unit 510 may classify and store each message ID included in the version related information. By separately storing the message IDs, version information of the disaster message having the corresponding message ID may be stored.

The controller 509 may control to ignore, store, and / or display the disaster message decoded by the second decoder.

At this time, the controller 509 determines whether a disaster message corresponding to the message ID information included in the version related information decoded by the second decoder is received. If the disaster message corresponding to the message ID information is received as a result of the determination, the version information included in the version related information decoded by the second decoder 508 is greater than the version information of the received disaster message. Compare if big.

In addition, the controller 509 controls to store and display the parsed disaster message when the version information is larger than the version information of the received disaster message. However, when the version information is equal to or smaller than the version information of the received disaster message, the parsed disaster message may be controlled to be ignored.

The controller 509 determines that the parsed disaster message is the first received new disaster message, and stores and displays the disaster message when the disaster message corresponding to the message ID information is not received. desirable.

In addition, the controller 509 may compare whether the information indicating the disaster end time included in the disaster end time related information parsed by the second decoder 508 is greater than the information indicating the time of the current system.

As a result of the comparison, when the information indicating the disaster end time is larger than the information indicating the time of the current system, the parsed disaster message is not valid and is preferably controlled to be ignored. However, when the comparison result indicates that the information indicating the disaster end time is less than or equal to the information indicating the time of the current system, the parsed disaster message is still valid information, and it is preferable to leave it as it is.

(3) a method of processing the digital broadcast signal

Hereinafter, a method of processing a disaster message according to the present invention using the above-described digital broadcast receiver according to the present invention will be described. FIG. 6A is an example of a method of processing a digital broadcast signal including disaster version related information according to the present invention. 6B is a flowchart illustrating an example of a method of processing a digital broadcast signal including disaster version related information and disaster end time related information according to the present invention.

First, FIG. 6A will be described.

A digital broadcast signal according to the present invention is received (S601).

The disaster message in the fast information channel (FIC) of the received broadcast signal is parsed (S602).

In operation S603, it is determined whether a disaster message having the same message ID information as the message ID information included in the parsed disaster message has been received.

As a result of the determination, when a disaster message having the same message ID information as the parsed message ID information is received, it is compared whether the version number information included in the parsed disaster message is greater than the version number information of the received disaster message (S604). ).

As a result of the comparison, if the version number information included in the parsed disaster message is larger than the version number information of the received disaster message, the parsed disaster message is updated and displayed (S605).

However, if the version number information included in the parsed disaster message is equal to or less than the version number information of the received disaster message, the parsed disaster message is discarded (S606).

In addition, if the disaster message having the same message ID information as the parsed message ID information has not been received in the result of the determination in S603, the disaster message is first received, and thus it should be stored and displayed.

By determining whether to update the disaster message received through the process according to the present invention, it is possible to prevent the degradation of system efficiency caused by processing and displaying the disaster message every time it is received, and repeat the same disaster message The display may reduce the inconvenience caused by the user watching the digital multimedia broadcasting or repeatedly viewing the duplicate message. In addition, it is possible to efficiently manage a database having a limited capacity.

Next, Fig. 6B will be described. In this case, S611 to S616 of FIG. 6B are the same as S601 to S606 of FIG. 6A described above, and for the convenience of description, the above description will be used and the process after S616 will be described. This is because in the case of FIG. 6B, the received broadcast signal includes not only the disaster version related information but also the disaster end time related information.

Therefore, after updating and displaying the parsed disaster message as described above with reference to FIG. 6A (S616), it is determined whether the disaster end time related information included in the parsed disaster message is greater than the time information of the current receiver system (S617). ).

As a result of the determination, if the parsed disaster end time related information is larger than the time information of the current receiver system, it is determined that the corresponding disaster message is no longer valid information and the stored disaster message is removed (S618).

However, if the parsed disaster end time related information is less than or equal to the time information of the current receiver system, it is determined that the disaster message is still valid information and waits until the next disaster message is received.

As described above, the disaster end time related information may mean the time when the actual disaster is terminated, or may mean time information indicating when the corresponding disaster message is valid. In the case of FIG. 6B described above, the latter example is taken as an example, but in the former case, the above-described process is similar.

That is, when the disaster end time-related information indicates the time when the actual disaster has ended, if the disaster end time-related information is greater than or equal to the current time information of the receiver system, it is information about a disaster message that has already been completed. Just remove it from. At this time, even if the information on the disaster message that the disaster is already terminated, the user may not know whether the disaster has ended, so it may be desirable to remove the display after the display.

If the disaster end time-related information is smaller than the current time information of the receiver system, the disaster message should be stored until the time indicated by the above-mentioned disaster end time-related information since it corresponds to a disaster message when the disaster has not yet ended. .

If the time indicated by the disaster end time related information is reached, it may be displayed and removed from the database.

According to the process of FIG. 6B according to the present invention, it is possible to efficiently manage the database by processing a disaster message that is terminated or no longer valid, thereby increasing the efficiency of the system and not causing confusion to the user.

Therefore, according to the digital broadcast signal and the apparatus and method for processing the signal according to the present invention described above,

First, there is no need to process all the disaster messages received there is an effect that can increase the efficiency of the receiver system.

Second, users can always display the latest information instead of displaying all the disaster messages, so that the user can avoid the confusion or the case of not being able to watch digital broadcasts by redisplaying the same or past disaster messages. have.

Third, it is possible to use the database, it is possible to represent and retrieve all the list of the disaster messages received.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (15)

In a digital broadcast signal, The broadcast signal is composed of a synchronization channel (SYNC), a fast information channel (FIC), and a main service channel (MSC), The FIC includes a disaster message for disaster broadcast, The disaster message includes a version related information broadcast signal. The method of claim 1, The disaster message broadcast signal further comprises a disaster end time related information. The method of claim 2, The version related information includes information indicating a message identification and / or version indicating a message of a corresponding disaster message. The method of claim 3, wherein The information indicating the message ID includes an identifier for uniquely identifying the corresponding disaster message, and the information indicating the version includes a version number indicating whether the corresponding disaster message has been changed. Broadcast signal, characterized in that. The method of claim 2, The disaster end time related information includes information indicating a disaster end time and information indicating whether or not there is information indicating the disaster end time. The method of claim 5, The information indicating the disaster end time is any one of information on the time when the disaster is indicated by the disaster message and information on the time when the disaster message is valid. In the method for processing a digital broadcast signal, Receiving the digital broadcast signal; Parsing a disaster message in a fast information channel (FIC) of the received broadcast signal; Determining whether a disaster message having the same message ID information as the message identification information included in the parsed disaster message has been received; When the disaster message having the same message ID information as the parsed message ID information is received, comparing the version number information included in the parsed disaster message to be greater than the version number information of the received disaster message; And And if the version number information included in the parsed disaster message is greater than the version number information of the received disaster message, updating and displaying the parsed disaster message. How to feature. The method of claim 7, wherein The information on the disaster end time included in the parsed disaster message is compared with the information on the time of the current system, and when the comparison result is greater than the information on the time of the current system, the stored disaster Removing the message. The method of claim 8, In the process of determining, And if the disaster message having the same message ID information as the parsed message ID information is not received, storing and displaying the disaster message. The method of claim 8, In the comparing process, And disabling the parsed disaster message if the version number information included in the parsed disaster message is equal to or less than the version number information of the received disaster message. How to. In a digital broadcast receiver, A broadcast receiving unit receiving a broadcast signal including version related information or version related information and disaster end time related information in a disaster message for disaster broadcasting; A broadcast demodulator for demodulating the received broadcast signal; A first decoder which decodes an FIC among the demodulated broadcast signals; A second decoder which decodes the disaster message in the FIC decoded by the first decoder; A storage unit for storing the disaster message decoded by the second decoder; A display unit displaying a disaster message decoded by the second decoder; And And a controller for controlling to ignore, store, and / or display the disaster message decoded by the second decoder. The method of claim 11, If the disaster message corresponding to the message ID information included in the version related information decoded by the second decoder is received, the controller is further configured to display version information included in the version related information decoded by the second decoder. Device for comparing whether the received disaster message is greater than the version information. The method of claim 12, And the controller controls to store and display the parsed disaster message if the version information is greater than the version information of the received disaster message. The method of claim 11, The control unit controls to store and display the parsed disaster message when a disaster message matching the message ID information is not received. The method of claim 11, If the information indicating the disaster end time included in the disaster end time related information parsed by the second decoder is greater than the information indicating the time of the current system, the controller may control to ignore the parsed disaster message because it is not valid. Device characterized by.

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