JP2010093660A - System, method and program of emergency warning broadcast distribution in ip transmission, receiving side apparatus of emergency warning broadcast distribution system in ip transmission, processing method of receiving side apparatus, and processing program of processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency warning broadcast distribution system in IP transmission, which can achieve operation of emergency warning broadcast even when local distribution is not performed and can reduce operation cost. <P>SOLUTION: A sending side apparatus 100 outputs execution information of emergency warning broadcast by checking a PMT in a medium stream (103), sends the medium stream (106), and generates and sends emergency warning broadcast notification information based on the execution information (107, 108). A receiving side apparatus 200 determines whether area information set in a set value 203 is included in a receiving target area indicated by area information in the emergency warning broadcast notification information or not based on information receiving the sent emergency warning broadcast notification information, and when the area information is included, presents the execution of the emergency warning broadcast to a user, and when the user selects the reception, selects the channel of the broadcast and reproduces the broadcast (201 to 207). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides an emergency alert broadcast in a transmission facility or transmission network when digitally transmitting a digital broadcast composed of video, audio, subtitles, data broadcasting, PSI (Program Specific Information) / SI (Service Information), and the like. The present invention relates to a method for enabling IP distribution of emergency warning broadcasting even when notification information is not distributed in a limited area.

  In digital broadcasting, an emergency warning system (EWS) is used to automatically activate the receiver when a disaster such as an earthquake tsunami occurs and to notify the viewer of emergency information more quickly. (Refer nonpatent literature 1).

  The emergency alert broadcasting is realized by including a special activation bit in TMCC (Transmission and Multiplexing Configuration and Control) and operating PSI. An activation control signal for emergency alert broadcasting (emergency alert broadcast activation flag) is assigned to the TMCC, and the receiver can control the activation of the receiver by monitoring this bit. Further, detailed information on EWS is transmitted by an emergency information descriptor described in a PMT (Program Map Table). The receiver automatically activated by the TMCC activation control signal receives the target TS (Transport Stream), and the area code described in the emergency information descriptor in the PMT corresponds to the area code set in the receiver. If so, the emergency alert broadcast is automatically selected and viewing is started (see Non-Patent Document 2).

There is a method in which information equivalent to the activation control signal for TMCC emergency alert broadcasting is IP-transmitted as emergency alert broadcast notification information when IP transmission is performed for such an emergency alert broadcast (see Non-Patent Document 3). In this case, when the receiver performs the same operation as when receiving the digital broadcast, the receiver that received the emergency alert broadcast notification information simultaneously receives the TS and confirms the PMT as the emergency alert broadcast notification information is received. Since a channel selection signal is transmitted to the IP network all at once, a great load is applied to the IP network. As a method of avoiding this, there is a method of distributing the timing by user operation by sandwiching a notification screen to the user in advance instead of directly receiving TS when receiving emergency alert broadcast notification information. Yes (see Non-Patent Document 4).
“Rules for Digital Terrestrial Television Broadcasting”, ARIB TR-B14 3.6 Edition, June 6, 2008, Volume 7, 7.9 Operation of Emergency Warning Broadcasting (EWS), pp. 7-38 to 7-39 “Rules for Digital Terrestrial Television Broadcasting”, ARIB TR-B14 3.6 Edition, June 6, 2008, Volume 2, 6.11.4 Receiving Emergency Warning Broadcast (EWS), pp. 2-31 to 2-32 “Terrestrial digital television broadcast IP retransmission operation regulations”, IPTVFJ STD-0005 1.1 edition, September 1, 2008, volume 7, 6.3 Emergency Warning Broadcast (EWS) Transmission Method, pp. 7-21 to 7-24 “Digital Terrestrial Television Broadcasting IP Retransmission Operation Regulations”, IPTVFJ STD-0005 1.1 Edition, September 1, 2008, Volume 6, 6.11.2 Receiving Emergency Warning Broadcasting (EWS), pp. 2-38 to 2-40

  As described above, in order to reduce the load on the IP network, the emergency alert broadcast notification information is distributed only for each region by using a user operation with a notification screen to the user in advance. If this is not the case, a notification screen to the user will be displayed in spite of being outside the target area for emergency alert broadcasting. If the notification screen to the user is not distributed when the area is not covered by the emergency alert broadcast, the emergency alert broadcast notification information must be distributed only for each area. Introducing a distribution mechanism limited to each region into a broadcasting service that distributes nationwide distribution without regional limitations, such as BS digital broadcasting, increases the operating costs of transmission facilities and networks.

  The present invention solves the above-mentioned problem, and its purpose is to enable emergency warning broadcast operation even when regional limited distribution is not performed, and to reduce the operation cost, and the emergency warning broadcast distribution system in IP transmission, It is to provide a method and a program.

  The present invention uses the emergency alert broadcast notification information shown in FIG. 1 in the case of IP transmission of digital broadcast composed of video, audio, caption, data broadcast, PSI (Program Specific Information) / SI (Service Information), and the like. . Then, in the emergency alert broadcast notification information in which information equivalent to the TMCC activation control signal of all channels transmitted by IP is summarized, as shown in the broken line in FIG. 2, the area described in the emergency information descriptor in the PMT Add information equivalent to the code. The receiver uses information corresponding to this area code before receiving the TS to determine whether or not the emergency warning broadcast should be received.

  An emergency warning broadcast distribution system in IP transmission according to claim 1 of the present invention is an emergency warning broadcast distribution system in IP transmission that includes a transmission-side device and a reception-side device, and that transmits an emergency warning broadcast over an IP network. The sending side apparatus receives the media stream, and the emergency information descriptor in the PMT (program map table) in the media stream has information indicating that the emergency alert broadcast is being operated. If there is, the identification information of the TS (transport stream) in which the emergency warning broadcast is operated, the area information indicating the reception target area, and that the emergency warning broadcast is being operated. Emergency alert broadcast notification information generation control means for outputting emergency alert broadcast implementation information including information indicating the emergency alert broadcast notification information The media stream sending means for sending the media stream inputted to the composition control means to the IP network and the emergency alert broadcast implementation information output from the emergency alert broadcast notification information generation control means are input, and based on the implementation information To generate emergency alert broadcast notification information including information indicating whether the emergency alert broadcast is in operation, area information indicating the reception area of the emergency alert broadcast, and identification information of the TS in which the emergency alert broadcast is being implemented. Emergency warning broadcast notification information generating means for performing emergency warning broadcast notification information sending means for sending the emergency warning broadcast notification information generated by the emergency warning broadcast notification information generating means to the IP network, the receiving side device comprising: Receiving the setting means for setting the area information and the emergency alert broadcast notification information transmitted via the IP network. And determining whether the information indicating whether or not the emergency alert broadcast is operated in the emergency alert broadcast notification information is information indicating that the operation is performed, Whether or not the area of the area information set in the setting means is included in the reception target area indicated by the area information in the emergency alert broadcast notification information. If it is included, it is shown to the user that the emergency alert broadcast is being performed, and it is determined whether there is an operation for selecting reception of the emergency alert broadcast by the user. The emergency alert broadcast notification information processing means for outputting a channel selection promotion notification together with the identification information of the TS on which the emergency alert broadcast is being implemented in the emergency alert broadcast notification information, and the emergency alert broadcast notification information processing unit Receiving the identification information of the TS on which emergency alert broadcasting is being performed and the channel selection promotion notification output from the stage, and a channel selection means for selecting a channel specified by the identification information of the TS, A media stream of a channel transmitted through a network and selected by the channel selection means is received and reproduced.

  The emergency alert broadcast delivery method in IP transmission according to claim 2 is an emergency alert broadcast delivery method in IP transmission that includes a transmission-side device and a reception-side device and transmits emergency alert broadcast over an IP network. Then, the emergency alert broadcast notification information generation control means of the sending side device inputs the media stream, and the emergency alert broadcast is operated on the emergency information descriptor in the PMT (program map table) in the media stream. Determining whether or not there is information indicating that there is information, and if there is information as a result of the determination, identification information of a TS (transport stream) in which the emergency alert broadcast is operated, reception target Step for outputting emergency alert broadcast implementation information including regional information indicating the region and information indicating that the emergency alert broadcast is in operation. And, if there is no information as a result of the determination, implementation of emergency warning broadcasting including identification information of TS for which emergency warning broadcasting is not operated and information indicating that emergency warning broadcasting is not operated A step of outputting information; a step of outputting the input media stream; and a step of transmitting a media stream output from the emergency alert broadcast notification information generation control unit to the IP network; Whether the emergency alert broadcast notification information generating means inputs the emergency alert broadcast implementation information output from the emergency alert broadcast notification information generation control means, and whether or not the emergency alert broadcast is operated based on the implementation information. Information indicating the area where the emergency alert broadcast is to be received, and the TS where the emergency alert broadcast is being implemented Generating emergency alert broadcast notification information including other information, and transmitting an emergency alert broadcast notification information generated by the emergency alert broadcast notification information generating means to the IP network. The emergency alert broadcast notification information processing means of the receiving side device receives the information received from the emergency alert broadcast notification information sent via the IP network, and operates the emergency alert broadcast in the emergency alert broadcast notification information. A first determination step for determining whether or not the information indicating whether or not is information indicating that the operation is being performed, and the determination result of the first determination step is the operation of the emergency warning broadcast Is the information indicating that the area information is set, the area of the area information set in the setting means is received by the area information in the emergency alert broadcast notification information. A second determination step for determining whether or not the target area is included in the communication target area, and an emergency alert broadcast being performed when the determination result of the second determination step is included in the target reception area. When there is a step presented to the user, a third determination step for determining whether or not there is an operation for selecting reception of the emergency alert broadcast by the user, and a determination result of the third determination step, the operation being performed And a step of outputting a channel selection promotion notification together with identification information of the TS on which the emergency alert broadcast is carried out in the emergency alert broadcast notification information, and a channel selection means are output from the emergency alert broadcast notification information processing means Inputting the identification information of the TS on which the emergency alert broadcast is being carried out and the channel selection promotion notification, and selecting the channel specified by the identification information of the TS; The IP network is sent through the receive media stream of the selected channel by the channel selecting means is characterized by comprising the steps of reproducing.

  An emergency warning broadcast distribution program in IP transmission according to claim 3 is an emergency warning broadcast distribution program in IP transmission that causes a computer to function as each means according to claim 1.

  Further, the receiving side device of the emergency alert broadcast distribution system for IP transmission according to claim 4 receives the media stream, and operates the emergency alert broadcast based on the emergency alert broadcast implementation information existing in the media stream. Generating emergency alert broadcast notification information including information indicating whether or not the emergency alert broadcast has been performed, regional information indicating the reception target area of the emergency alert broadcast, and identification information of the TS on which the emergency alert broadcast is being implemented, and the emergency alert broadcast notification A receiving-side device of an emergency warning broadcast distribution system in IP transmission that includes a sending-side device that sends information and a media stream, and a receiving-side device, and that transmits an emergency warning broadcast over an IP network, and has regional information Setting means to be set, and information on receiving emergency alert broadcast notification information sent from the sending side device via the IP network. To determine whether or not the information indicating whether or not the emergency alert broadcast is operated in the emergency alert broadcast notification information is information indicating that the operation is being performed, If the information is information indicating that the information has been made, it is determined whether or not the region of the region information set in the setting unit is included in the reception target region indicated by the region information in the emergency alert broadcast notification information If it is included, it is shown to the user that the emergency alert broadcast is being conducted, it is determined whether there is an operation for selecting reception of the emergency alert broadcast by the user, and From the emergency alert broadcast notification information processing means for outputting a channel selection promotion notification together with the identification information of the TS on which the emergency alert broadcast is implemented in the emergency alert broadcast notification information, and the emergency alert broadcast notification information processing means Receiving the identification information of the TS on which emergency alert broadcasting is being performed and the channel selection promotion notification, and channel selection means for selecting a channel specified by the identification information of the TS. And receiving a media stream of the channel selected by the channel selection means and playing it back.

  In addition, the processing method of the receiving side device of the emergency alert broadcast distribution system in IP transmission according to claim 5 receives the media stream as an input, and based on the emergency alert broadcast implementation information existing in the media stream, the emergency alert Generating emergency alert broadcast notification information including information indicating whether or not the broadcast operation is performed, regional information indicating a reception target area of the emergency alert broadcast, and identification information of a TS in which the emergency alert broadcast is performed, A processing method of a receiving side device of an emergency warning broadcast distribution system in IP transmission that includes a sending side device that sends out alarm broadcast notification information and a media stream, and a receiving side device, and that transmits an emergency warning broadcast over an IP network. The emergency alert broadcast notification information processing means receives the emergency alert broadcast notification information sent via the IP network. A first determination that determines whether or not the information indicating whether or not the emergency alert broadcast is operated in the emergency alert broadcast notification information is information indicating that the operation is performed And when the determination result of the first determination step is information indicating that emergency warning broadcasting is being operated, the area of the regional information set in the setting means is the emergency warning broadcast notification information A second determination step for determining whether or not the region is included in the reception target region indicated by the region information in the region, and an emergency alert broadcast when the determination result of the second determination step is included in the reception target region Is provided to the user, a third determination step for determining whether or not there is an operation for selecting reception of the emergency alert broadcast by the user, and the third determination step. As a result of the determination, when the operation is performed, a step of outputting a channel selection promotion notification together with identification information of a TS in which the emergency alert broadcast is performed in the emergency alert broadcast notification information; The step of inputting the identification information and the channel selection promotion notification of the TS on which the emergency alert broadcast is performed, which is output from the broadcast notification information processing means, and selecting the channel specified by the identification information of the TS; The apparatus comprises a step of receiving and playing back a media stream of a channel transmitted via the IP network and selected by the channel selection means.

  The processing program of the receiving side device of the emergency alert broadcast distribution system in IP transmission according to claim 6 is a receiving side device of the emergency alert broadcast distribution system in IP transmission that causes a computer to function as each means of claim 4. It is a processing program.

  The receiving device of the emergency alert broadcast distribution system for IP transmission according to claim 7 receives the media stream, and operates the emergency alert broadcast based on the emergency alert broadcast implementation information existing in the media stream. Generating emergency alert broadcast notification information including information indicating whether or not the emergency alert broadcast has been performed, regional information indicating the reception target area of the emergency alert broadcast, and identification information of the TS on which the emergency alert broadcast is being implemented, and the emergency alert broadcast notification A receiving-side device of an emergency warning broadcast distribution system in IP transmission that includes an sending-side device that sends information and a media stream, and a receiving-side device, and that transmits an emergency warning broadcast over an IP network, the IP network Emergency alert broadcast notification information receiving means for receiving emergency alert broadcast notification information sent via the emergency alert broadcast, When the emergency alert broadcast notification information received by the intelligent information receiving means is input, it is presented to the user that the emergency alert broadcast is being performed, and when there is an operation to select reception of the emergency alert broadcast by the user, The emergency alert broadcast notification information processing means for outputting a channel selection promotion notification together with the identification information of the TS on which the emergency alert broadcast is being implemented in the emergency alert broadcast notification information, and the emergency alert broadcast notification information processing means are output. A channel selection means for issuing an instruction to select a channel specified by the identification information of the TS, which is input through the identification information of the TS on which the emergency alert broadcasting is being implemented and the channel selection promotion notification, and transmitted via the IP network The received media stream and the command issued from the channel selection means are input, and the media stream of the channel specified by the command is input A media stream receiving means for outputting; a PSI processing means for receiving the media stream output from the media stream receiving means, checking an emergency information descriptor in the media stream, and outputting a media stream for emergency alert broadcasting; And a reproducing means for reproducing the media stream output from the PSI processing means.

  According to the present invention, when an emergency warning broadcast in a digital broadcast is transmitted over an IP network, the emergency warning broadcast can be operated even when distribution limited to each region is not performed at the time of transmission, and the operation cost can be reduced. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

  FIG. 3 shows a functional block diagram of the entire emergency alert broadcast distribution system in the IP transmission of this embodiment. In FIG. 3, 100 is a sending side device, 200 is a receiving side device, and 300 is an IP network connecting the sending side device 100 and the receiving side device 200.

  Reference numeral 101 in the sending apparatus 100 denotes program content, and reference numeral 102 denotes a playback function of playback means for playing back the program content 101. Reference numeral 104 denotes an antenna that receives a broadcast wave, and reference numeral 105 denotes a tuner that converts the broadcast wave received by the antenna 104 into a digital signal.

  103 monitors the emergency information descriptor in the PMT in the media stream output from the playback function 102 or the tuner 105, outputs the execution information of the emergency alert broadcast described later, and outputs the media stream The emergency alert broadcast notification information generation control function performed by the information generation control means is shown.

  Reference numeral 106 denotes a media stream transmission function performed by media stream transmission means for transmitting the media stream output from the emergency alert broadcast notification information generation control function 103 to the IP network 300.

  107 is an emergency alert broadcast performed by an emergency alert broadcast notification information generating means for generating emergency alert broadcast notification information, which will be described later, based on the emergency alert broadcast execution information output from the emergency alert broadcast notification information generation control function 103 The notification information generation function is shown.

  Reference numeral 108 denotes an emergency alert broadcast notification information sending function of emergency alert broadcast notification information sending means for sending the emergency alert broadcast notification information generated by the emergency alert broadcast notification information generating function 107 to the IP network 300.

  Reference numeral 201 denotes an emergency alert broadcast notification information receiving function of an emergency alert broadcast notification information receiving means for receiving emergency alert broadcast notification information sent via the IP network 300.

  202 is an emergency alert broadcast that receives the emergency alert broadcast notification information output from the receiver 201 and outputs the identification information of the TS for which the emergency alert broadcast is being performed and the channel selection promotion notification by performing the processing described later The emergency alert broadcast notification information processing function of the notification information processing means is shown.

  Reference numeral 203 denotes a setting value of a setting unit for setting area information.

  204 receives, as input, the identification information of the TS on which emergency warning broadcasting is carried out and the channel selection promotion notification, which are output from the emergency warning broadcast notification information processing function 202, and performs the processing described later, based on the identification information of the TS The channel selection function of the channel selection means which issues the command which selects the channel specified is shown.

  205 receives as input a media stream sent via the IP network 300 and a command issued from the channel selection function 204, and outputs a media stream of a channel designated by the command. The reception function is shown.

  Reference numeral 206 denotes a PSI processing function of PSI processing means that receives the media stream output from the media stream receiving function 205, confirms an emergency information descriptor in the media stream, and outputs an emergency alert broadcast media stream. ing.

  Reference numeral 207 denotes a playback function of playback means for playing back the media stream output from the PSI processing function 206.

  Next, a processing flow for each functional block of the transmission side apparatus 100 will be described.

  The reproduction function 102 reproduces the program content 101 and outputs a media stream to the emergency alert broadcast notification information generation control function 103. Alternatively, the antenna 104 receives the broadcast wave and outputs the broadcast wave to the tuner 105. The tuner 105 converts the input broadcast wave into a digital signal and outputs it as a media stream to the emergency alert broadcast notification information generation control function 103. .

  The emergency alert broadcast notification information generation control function 103 performs monitoring of the emergency information descriptor in the PMT included in the input media stream and output processing to the media stream transmission function 106. The monitoring of the emergency information descriptor in the PMT is a case where information indicating that the emergency warning broadcast is being operated is included in the PMT (there is an emergency information descriptor with start_end_flag = 1). Information relating to the emergency alert broadcast in operation (TS_id of the TS where the emergency alert broadcast is operated, the area code that is the reception target range) is extracted from the PAT (Program Association Table) and the emergency information descriptor in the PMT, This is processing to be transmitted to the emergency alert broadcast notification information generation function 107. A processing flow example of the emergency alert broadcast notification information generation control function 103 will be described with reference to FIG.

  In the flowcharts of FIGS. 4 and 5 to be described below, “S” indicates each processing step.

  S401: Upon receiving a media stream input from the playback function 102 or the tuner 105, the process proceeds to S402.

  S402: The PMT is extracted from the media stream input in S401. If an emergency information descriptor with start_end_flag = 1 is allocated, the process proceeds to S403. If not, the process proceeds to S404.

  S403: TS_id (transport_stream_id) acquired from the PAT in the media stream input in S401 to the emergency alert broadcast notification information generation function 107, and the area code (area_code) in the emergency information descriptor of the PMT acquired in S402 ) And the emergency alert broadcast notification information generation function 107 is notified that the emergency alert broadcast is being carried out by the TS (TS specified by the delivered TS_id), and the process proceeds to S405.

  S404: Deliver TS_id (transport_stream_id) acquired from the PAT in the media stream input in S401 to the emergency alert broadcast notification information generation function 107 and confirm that the emergency alert broadcast is not implemented in the TS. Notification is made, and the process proceeds to S405.

  S405: The media stream input in S401 is output to the media stream transmission function 106.

  In S403, as a method of acquiring the TS_id of the TS included in the input media stream, in addition to the method of acquiring from the PAT, the method is statically set manually in association with the media stream input in advance. There is a method of using a different value.

  In S403 and S404, as a method for notifying whether or not emergency alert broadcast is being performed from the emergency alert broadcast notification information generation control function 103 to the emergency alert broadcast notification information generation function 107, for example, emergency alert broadcast A flag indicating whether or not the emergency alert broadcast is being executed is provided, and the emergency alert broadcast notification information generation control function 103 sets a value indicating that the emergency alert broadcast is being performed, or a predetermined value. A flag indicating whether or not the emergency alert broadcast notification information generation control function 103 is executing an emergency alert broadcast to the emergency alert broadcast notification information generation function 107 after setting to a value indicating that the emergency alert broadcast is not performed. There is a way to pass.

  The media stream transmission function 106 outputs the input media stream to the IP network 300.

  The emergency alert broadcast notification information generation function 107 is based on the emergency alert broadcast implementation information notified from the emergency alert broadcast notification information generation control function 103 (the emergency alert broadcast implementation information is the emergency alert broadcast notification information generation control function). 103, information indicating whether or not an emergency alert broadcast is being performed, TS_id, and area code are generated, and emergency alert broadcast notification information is generated (according to the implementation of emergency alert broadcast, EWS_start_flag_1, EWS_start_flag_2, num_of_area_code, and area_code are updated) And output to the emergency alert broadcast notification information sending function 108. In addition, when even one TS_id for which an emergency alert broadcast is being performed is received from the emergency alert broadcast notification information generation control function 103, EWS_start_flag_1 is set to 1 (a predetermined value indicating that an emergency alert broadcast is being performed). To do. The EWS_start_flag_2 and the area code (area_code) are managed for each TS_id received from the emergency alert broadcast notification information generation control function 103, and only EWS_start_flag_2 corresponding to the TS_id received from the emergency alert broadcast notification information generation control function 103 (1 in advance) And a region code (area_code) received from the emergency alert broadcast notification information generation control function 103 is set at the same time.

  The emergency alert broadcast notification information sending function 108 outputs the input emergency alert broadcast notification information to the IP network 300.

  Next, a processing flow for each functional block of the reception-side apparatus 200 will be described.

  The emergency alert broadcast notification information reception function 201 always receives emergency alert broadcast notification information from the IP network 300 and outputs it to the emergency alert broadcast notification information processing function 202.

  The emergency alert broadcast notification information processing function 202 monitors the value of EWS_start_flag_1 included in the emergency alert broadcast notification information input from the emergency alert broadcast notification information reception function 201 (the value of EWS_start_flag_1 is set in advance for the operation of the emergency alert broadcast. A value indicating that this is done (in this embodiment, it is determined whether it is 1)).

  When emergency warning broadcasting is in operation (the value of EWS_start_flag_1 is 1), the area code in the emergency warning broadcast notification information is compared with the area code set in advance in the set value 203 (target area) As a process for determining whether or not an emergency warning broadcast is being carried out, for example, in the area code in the emergency warning broadcast notification information acquired in S502 to be described later, the set value of the receiving device 200 There is a method for determining that emergency warning broadcasting is being carried out in the target area when there is a preset area code in 203.

  In the case of the target area, a screen for notifying that the emergency alert broadcast is being operated is presented (for example, displayed on a display not shown) to encourage viewing of the emergency alert broadcast. Then, when viewing of the emergency alert broadcast is selected by the user's operation (for example, operation with a keyboard not shown), the channel selection function 204 is notified together with its TS_id that the emergency alert broadcast is being operated, Instruct the tuning. A processing flow example of the emergency alert broadcast notification information processing function 202 will be described with reference to FIG.

  S501: Upon receiving the emergency alert broadcast notification information input from the emergency alert broadcast notification information receiving function 201, the process proceeds to S502.

  S502: EWS_start_flag_1 in the emergency alert broadcast notification information input in S501 is monitored, and if the value is 1 (predetermined value indicating that the emergency alert broadcast is being implemented), go to S503. If not, the process proceeds to S507.

  S503: Compare the regional code in the emergency alert broadcast notification information acquired in S502 with the regional code set in the receiver, specifically, the preset value 203 in the setting value 203 of the receiver 200, If it is determined that emergency alert broadcasting is being carried out in the target area, the process proceeds to S504, and if not, the process proceeds to S507.

  S504: The user is prompted to perform a viewing operation by notifying the user that the emergency alert broadcast is being performed by screen display or voice, and the process proceeds to S505.

  S505: If an emergency warning broadcast viewing operation is performed by the user, the process proceeds to S506, and if no viewing operation is performed (when there is an operation not viewing), the process proceeds to S507 (note that the user viewing is performed in S505). After prompting the operation, if the user operation is not performed even after a predetermined period of time has elapsed, it may be considered that the user has not performed the emergency alert broadcast viewing operation, and the process may proceed to S507.

  S506: TS_id on which the emergency alert broadcast is carried out is extracted from the emergency alert broadcast notification information input in S501, the extracted TS_id is notified to the channel selection function 204, and the emergency alert broadcast in the TS of the TS_id is transmitted. Instructs the selection operation.

  S507: When notifying the user that the emergency alert broadcast is being performed by screen display or voice, the notification is stopped. Otherwise, nothing is done and the current state is maintained.

  The channel selection function 204 notifies the reception function 205 to receive the designated channel (the channel specified by TS_id notified from the emergency alert broadcast notification information processing function 202) (issues a channel selection command). .

  The reception function 205 receives the media stream of the channel designated by the channel selection function 204 from the IP network 300 and outputs it to the PSI processing function 206.

  The PSI processing function 206 extracts the PMT from the media stream input from the reception function 205, confirms the emergency information descriptor, and outputs the emergency alert broadcast media stream to the playback function 207.

  The playback function 207 plays back the media stream input from the PSI processing function 206.

  As a result, even when the emergency alert broadcast is transmitted through the IP network, the operation can be performed without distributing the emergency alert broadcast notification information for each target area.

  Next, an embodiment of the present invention in which the emergency alert broadcast can be operated without performing the limited delivery of the emergency alert broadcast notification information to each region in the IP broadcast or the simultaneous IP retransmission will be described.

Example 1
FIG. 6 shows a system configuration when the present invention is used in IP broadcasting. In FIG. 6, reference numeral 801 denotes an IP transmission server provided with the transmission side apparatus 100 of FIG. Reference numeral 802 denotes a multicast stream transmitted from the IP transmission server 801 via the IP network 804. Reference numeral 803 denotes a receiver including the receiving-side apparatus 200 shown in FIG.

  When used in the IP broadcast, the IP transmission server 801 has a function of sending a multicast stream 802 including a broadcast program. The receiver 803 has a function of receiving, playing back, and displaying the multicast stream 802.

  Hereinafter, system operation in the present embodiment in IP broadcasting will be described.

  (1) From the IP transmission server 801, a multicast stream 802 of broadcast program and emergency alert broadcast notification information is transmitted. At this time, transmission is performed with the area code embedded in the emergency alert broadcast notification information.

  (2) The receiver 803 receives the multicast stream 802, performs the processing of the receiving side apparatus 200 described with reference to FIG. 3, and views the emergency alert broadcast.

(Example 2)
FIG. 7 shows a system configuration when the present invention is used for simultaneous IP retransmission. In FIG. 7, reference numeral 901 denotes a broadcasting station facility, and reference numeral 902 denotes a digital broadcast wave transmitted from the broadcasting station facility 901. Reference numeral 903 denotes an IP transmission server provided with the transmission side apparatus 100 of FIG. Reference numeral 904 denotes a multicast stream transmitted from the IP transmission server 903 via the IP network 906. Reference numeral 905 denotes a receiver including the receiving-side apparatus 200 shown in FIG.

  The broadcasting station equipment 901 has a function of sending a digital broadcast wave 902 including a broadcast program. The IP transmission server 903 has a function of receiving a digital broadcast wave 902, converting the digital broadcast wave 902 into a multicast stream 904, and transmitting it. The receiver 905 has a function of receiving the multicast stream 904 and reproducing / displaying it.

  Hereinafter, the system operation in this embodiment in the simultaneous IP retransmission will be described.

  (1) A digital broadcast wave 902 carrying broadcast program information is sent from the broadcast station equipment 901.

  (2) The IP transmission server 903 receives the broadcast wave 902, converts it into a multicast stream 904, and transmits it. At this time, the TMCC activation control signal is converted into emergency alert broadcast notification information, and the transmission is performed with the area code in the PMT embedded in the emergency alert broadcast notification information.

  (3) The receiver 905 receives the multicast stream 904, performs the processing of the receiving-side apparatus 200 described with reference to FIG. 3, and views the emergency alert broadcast.

  Also, some or all of the functions of each means of the reception side device of the emergency alert broadcast distribution system for IP transmission and the emergency alert broadcast distribution system for IP transmission of this embodiment are configured by a computer program, and the program is stored in the computer. Each procedure of the emergency alert broadcast distribution method in the IP transmission and the processing method of the receiving side device of the emergency alert broadcast distribution system in the IP transmission can be realized by a computer program. Needless to say, the program can be executed by a computer, and a program for realizing the function of the computer can be recorded on a computer-readable recording medium such as FD (Floppy (registered trademark) Disk), MO (Magneto-Optic l disk), ROM (Read Only Memory), memory card, CD (Compact Disk) -ROM, DVD (Digital Versatile Disk) -ROM, CD-R, CD-RW, HDD, removable disk, etc. And can be distributed. It is also possible to provide the above program through a network such as the Internet or electronic mail.

Explanatory drawing of the emergency alert broadcast notification information utilized by this invention. Explanatory drawing which shows the data structure of the emergency alert broadcast notification information utilized by this invention. The functional block diagram of the embodiment of this invention. The flowchart which shows the process in the emergency alert broadcast notification information generation control function of this invention. The flowchart which shows an example of the process in the emergency alert broadcast notification information processing function of this invention. 1 is a system configuration diagram of Embodiment 1 of the present invention. The system block diagram of Example 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Sending side apparatus, 101 ... Program content, 102 ... Reproduction | regeneration function, 103 ... Emergency warning broadcast notification information generation control function, 104 ... Antenna, 105 ... Tuner, 106 ... Media stream transmission function, 107 ... Emergency warning broadcast notification information generation Function: 108 ... Emergency alert broadcast notification information transmission function, 200: Receiving device, 201 ... Emergency alert broadcast notification information reception function, 202 ... Emergency alert broadcast notification information processing function, 203 ... Setting value, 204 ... Channel selection function, 205 ... Media stream reception function, 206 ... PSI processing function, 207 ... Playback function, 300, 804, 906 ... IP network, 801, 903 ... IP transmission server, 802, 904 ... Multicast stream, 803, 905 ... Receiver, 901 ... Broadcasting station equipment, 902 ... Digital broadcasting wave.

Claims (7)

An emergency warning broadcast distribution system for IP transmission, which includes a transmission side device and a reception side device, and transmits an emergency warning broadcast over an IP network.
The sending device is:
A media stream is input, and it is determined whether or not there is information indicating that an emergency warning broadcast is in operation in an emergency information descriptor in a PMT (program map table) in the media stream. In this case, the emergency alert broadcast including the identification information of the TS (transport stream) in which the emergency alert broadcast is operated, the area information indicating the reception target area, and the information indicating that the emergency alert broadcast is being operated Emergency alert broadcast notification information generation control means for outputting information;
Media stream sending means for sending the media stream input to the emergency alert broadcast notification information generation control means to the IP network;
The emergency alert broadcast execution information output from the emergency alert broadcast notification information generation control means is input, information indicating whether or not the emergency alert broadcast is operated based on the implementation information, reception of the emergency alert broadcast Emergency alert broadcast notification information generating means for generating emergency alert broadcast notification information including area information indicating a target area and identification information of a TS in which the emergency alert broadcast is being implemented;
Emergency warning broadcast notification information sending means for sending emergency warning broadcast notification information generated by the emergency warning broadcast notification information generating means to the IP network,
The receiving side device
A setting means for setting regional information;
Information indicating whether or not the emergency alert broadcast in the emergency alert broadcast notification information is in operation is input using information received from the emergency alert broadcast notification information sent via the IP network as input. If the information is information indicating that the emergency alert broadcast is being operated, the area of the regional information set in the setting means is the emergency alert broadcast notification information. It is determined whether or not it is included in the reception target area indicated by the area information, and if it is included, the user is notified that the emergency warning broadcast is being performed, and the user selects reception of the emergency warning broadcast. If there is an operation to be performed, a tuning promotion notification is output together with the identification information of the TS on which the emergency alert broadcast is carried out in the emergency alert broadcast notification information. And emergency alert broadcast notification information processing means,
Channel selection that selects the channel specified by the identification information of the TS, using the identification information and the channel selection promotion notification of the TS on which the emergency warning broadcast is being output, which is output from the emergency warning broadcast notification information processing means Means and
An emergency warning broadcast distribution system for IP transmission, which receives and reproduces a media stream of a channel transmitted through the IP network and selected by the channel selection means. An emergency alert broadcast distribution method in IP transmission, which includes a sending side device and a receiving side device, and transmits an emergency alert broadcast over an IP network,
The emergency alert broadcast notification information generation control means of the sending side device inputs a media stream, and the emergency alert broadcast is operated in the emergency information descriptor in the PMT (program map table) in the media stream. Determining whether there is information indicating
As a result of the determination, if there is information, the identification information of the TS (transport stream) in which the emergency alert broadcast is operated, the area information indicating the reception target area, and the emergency alert broadcast are being operated. Outputting emergency alert broadcast implementation information including information to indicate;
If there is no information as a result of the determination, the emergency alert broadcast execution information including the identification information of the TS that is not operated and the information indicating that the emergency alert broadcast is not operated is output. And steps to
Outputting the input media stream;
Media stream sending means for sending the media stream output from the emergency alert broadcast notification information generation control means to the IP network;
Whether the emergency alert broadcast notification information generating means inputs the emergency alert broadcast implementation information output from the emergency alert broadcast notification information generation control means, and whether or not the emergency alert broadcast is operated based on the implementation information. Generating emergency alert broadcast notification information including information indicating, area information indicating a reception target area of the emergency alert broadcast, and identification information of a TS in which the emergency alert broadcast is performed,
An emergency alert broadcast notification information sending means for sending the emergency alert broadcast notification information generated by the emergency alert broadcast notification information generating means to the IP network;
The emergency alert broadcast notification information processing means of the receiving side device inputs information received emergency alert broadcast notification information sent via the IP network, and the emergency alert broadcast operation in the emergency alert broadcast notification information is operated. A first determination step for determining whether or not the information indicating whether or not the operation is performed is information indicating that the operation is performed;
When the determination result of the first determination step is information indicating that emergency alert broadcasting is being operated, the region of the region information set in the setting unit is the region in the emergency alert broadcast notification information A second determination step of determining whether or not it is included in the reception target area indicated by the information;
When the determination result of the second determination step is included in the reception target area, the step of presenting to the user that an emergency warning broadcast is being performed;
A third determination step of determining whether or not there is an operation for selecting reception of the emergency alert broadcast by a user;
A step of outputting a channel selection promotion notification together with identification information of a TS in which an emergency alert broadcast is performed in the emergency alert broadcast notification information when the operation is performed as a result of the determination of the third determination step;
The channel selection means inputs the identification information and the channel selection promotion notification of the emergency warning broadcast that is output from the emergency warning broadcast notification information processing means, and selects the channel specified by the identification information of the TS. The step of tuning,
An emergency alert broadcast distribution in IP transmission, comprising: a receiving device receiving and reproducing a media stream of a channel transmitted through the IP network and selected by the channel selection means; Method.   An emergency warning broadcast distribution program in IP transmission that causes a computer to function as each means according to claim 1. Based on the emergency alert broadcast implementation information existing in the media stream, the information indicating whether or not the emergency alert broadcast is operated, the regional information indicating the reception area of the emergency alert broadcast, and An emergency alert broadcast comprising: a transmission-side device that generates emergency alert broadcast notification information including identification information of a TS on which emergency alert broadcast is being performed, and transmits the emergency alert broadcast notification information and media stream; and a reception-side device. A device on the receiving side of an emergency alert broadcast distribution system in IP transmission for transmitting IP over an IP network,
A setting means for setting regional information;
Information indicating whether or not the emergency alert broadcast in the emergency alert broadcast notification information is operated, using the information received emergency alert broadcast notification information sent from the sending side device via the IP network as input, It is determined whether or not the information indicates that the operation is performed, and when the information indicates that the operation of the emergency warning broadcast is performed, the region of the region information set in the setting unit is the emergency It is determined whether or not it is included in the reception target area indicated by the area information in the alarm broadcast notification information, and if included, the user is notified that the emergency alarm broadcast is being performed, and the emergency alarm broadcast is performed by the user. It is determined whether there is an operation for selecting reception, and when there is an operation, channel selection prompting is performed together with the identification information of the TS that is carrying out the emergency alert broadcast in the emergency alert broadcast notification information. And emergency alert broadcast notification information processing means for outputting a notification,
Channel selection that selects the channel specified by the identification information of the TS, using the identification information and the channel selection promotion notification of the TS on which the emergency warning broadcast is being output, which is output from the emergency warning broadcast notification information processing means Means and
An apparatus for receiving an emergency alert broadcast distribution system in IP transmission, which receives and reproduces a media stream of a channel transmitted through the IP network and selected by the channel selection means. Based on the emergency alert broadcast implementation information existing in the media stream, the information indicating whether or not the emergency alert broadcast is operated, the regional information indicating the reception area of the emergency alert broadcast, and An emergency alert broadcast comprising: a transmission-side device that generates emergency alert broadcast notification information including identification information of a TS on which emergency alert broadcast is being performed, and transmits the emergency alert broadcast notification information and media stream; and a reception-side device. A processing method of a receiving side device of an emergency alert broadcast distribution system in IP transmission for transmitting IP over an IP network,
Whether the emergency alert broadcast notification information processing means inputs information received emergency alert broadcast notification information sent via the IP network, and whether or not the emergency alert broadcast in the emergency alert broadcast notification information is operated A first determination step of determining whether or not the information indicating is information indicating that the operation is being performed;
When the determination result of the first determination step is information indicating that emergency alert broadcasting is being operated, the region of the region information set in the setting unit is the region in the emergency alert broadcast notification information A second determination step of determining whether or not it is included in the reception target area indicated by the information;
When the determination result of the second determination step is included in the reception target area, the step of presenting to the user that an emergency warning broadcast is being performed;
A third determination step of determining whether or not there is an operation for selecting reception of the emergency alert broadcast by a user;
A step of outputting a channel selection promotion notification together with identification information of a TS in which an emergency alert broadcast is performed in the emergency alert broadcast notification information when the operation is performed as a result of the determination of the third determination step;
The channel selection means inputs the identification information and the channel selection promotion notification of the emergency warning broadcast that is output from the emergency warning broadcast notification information processing means, and selects the channel specified by the identification information of the TS. The step of tuning,
An emergency alert broadcast distribution in IP transmission, comprising: a receiving device receiving and reproducing a media stream of a channel transmitted through the IP network and selected by the channel selection means; Processing method of the receiving device of the system.   The processing program of the receiving side apparatus of the emergency alert broadcast delivery system in IP transmission which makes a computer function as each means of Claim 4. Based on the emergency alert broadcast implementation information existing in the media stream, the information indicating whether or not the emergency alert broadcast is operated, the regional information indicating the reception area of the emergency alert broadcast, and An emergency alert broadcast comprising: a transmission-side device that generates emergency alert broadcast notification information including identification information of a TS on which emergency alert broadcast is being performed, and transmits the emergency alert broadcast notification information and media stream; and a reception-side device. A device on the receiving side of an emergency alert broadcast distribution system in IP transmission for transmitting IP over an IP network,
Emergency alert broadcast notification information receiving means for receiving emergency alert broadcast notification information sent via the IP network;
The emergency alert broadcast notification information received by the emergency alert broadcast notification information receiving means is used as an input, the user is notified that the emergency alert broadcast is being performed, and the user selects the reception of the emergency alert broadcast. Emergency warning broadcast notification information processing means for outputting a channel selection promotion notification together with the identification information of the TS in which the emergency warning broadcast is carried out in the emergency warning broadcast notification information,
An instruction to select a channel specified by the identification information of the TS, with the input of the identification information of the TS on which the emergency warning broadcast is being performed and the channel selection promotion notification output from the emergency warning broadcast notification information processing means. Channel selection means to issue,
Media stream receiving means for receiving a media stream sent through the IP network and a command issued from the channel selection means as input, and outputting a media stream of a channel designated by the command;
PSI processing means for receiving a media stream output from the media stream receiving means, checking an emergency information descriptor in the media stream, and outputting an emergency alert broadcast media stream;
A receiving side device for an emergency alert broadcast distribution system in IP transmission, comprising: reproducing means for reproducing the media stream output from the PSI processing means.

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