JP2007081516A - Mobile receiver, receiving method, and receiving program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile receiver capable of correctly presenting warning information necessary for a user to the user without unnecessarily consuming power even when the position of the mobile receiver moves. <P>SOLUTION: A GPS antenna 21, a position information receiving unit 22 and a position information storage unit 23 acquire information of the present position of the mobile receiver. A digital broadcast antenna 11, a tuner 12, a demodulation/decoding unit 13, and an emergency warning broadcast detecting unit 16 acquire area information for specifying a warning area related to emergency warning broadcast from the emergency warning broadcast. A comparing unit 24 compares the position information with the area information. A warning determining unit 25 determines that a user must be notified of the emergency warning broadcast if a cellular phone is in the warning area. In this case, a power supply control unit 17 switches a power supply state from a usual power saving state to a warning power state. An AV decoder 14, a display unit 15, and a speaker 27 notify the user of a video image and a warning sound, based on the emergency warning broadcast. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a mobile receiver that can be used together with a user, a reception method for the mobile receiver, and a reception program, for example, a mobile phone, a mobile information terminal, a notebook computer, The present invention relates to a receiving device such as a vehicle-mounted terminal (for example, a car navigation system).

  In recent years, digital broadcasting using satellites and terrestrial waves has been put into practical use, and various types of information are transmitted superimposed on broadcast waves. For example, an emergency warning broadcast is provided for notifying the user of the content of a disaster when a disaster such as an earthquake or tsunami occurs or is predicted.

  An example of a digital broadcast receiving apparatus that receives the emergency alert broadcast is a digital broadcast receiving apparatus disclosed in Patent Document 1. In this digital broadcast receiving apparatus, an emergency warning broadcast is automatically recorded, and a message notifying that it has been recorded is displayed on the screen. In this case, even if the digital broadcast receiving device is used in a fixed manner and the user is not near the digital broadcast receiving device, or the emergency alert broadcast is broadcast while sleeping or going out, the emergency alert broadcast Can be presented to the user.

  Moreover, there exists an emergency disaster prevention information transmission system described in patent document 2, for example as an emergency disaster prevention information transmission system which transmits emergency disaster prevention information to a user similarly to said emergency warning broadcast. This emergency disaster prevention information transmission system uses one of a plurality of types of transmission methods such as communication satellites, dedicated lines, meteorological satellites, teletext, medium wave radio, the Internet, etc. Is compared with the preset area, and if this comparison result matches, if other disaster prevention information has already been sent to the area, transmission of the disaster prevention information is suppressed, and if it shows a mismatch, Disaster prevention information is transmitted. In this case, it is possible to reliably receive important emergency information such as disaster prevention measures without delay and loss, and promptly notify a user who needs the necessary information.

On the other hand, in 2006, one-segment broadcasting (one-segment broadcasting) of digital terrestrial broadcasting is scheduled for mobile use, and it becomes possible to receive digital broadcasting while moving. Since such a mobile phone or the like that can receive 1-segment broadcasting is always carried by the user, it is expected to be quickly reported and to promptly transmit emergency alert broadcasting to the user.
JP 2003-250112 A JP 2001-76276 A

  However, since the receiving device that receives the emergency alert broadcast or the like is assumed to be used in a fixed position, no consideration is given to a mobile receiving device that can move the receiving position. That is, since the position of a mobile reception device such as a mobile phone changes with the movement of the user, if the emergency alert broadcast is simply received and displayed, the emergency alert broadcast unrelated to the current location of the user is also displayed. In this case, an unnecessary emergency warning broadcast is presented to the user.

  In addition, since the above mobile receivers are usually battery-powered, there is a demand for power saving, but the power consumption of digital broadcast demodulation and decoding processing is generally large, so unnecessary emergency warning broadcasts are displayed. As a result, the battery is exhausted and the battery runs out, and the emergency alert broadcast that is truly necessary for the user, that is, the emergency alert broadcast related to the current location of the user cannot be presented.

  An object of the present invention is to provide a mobile reception device, a reception method, and a reception program capable of accurately presenting warning information required by the user to the user even when the position of the mobile reception device moves.

  The mobile reception device according to the present invention is a mobile reception device in which a place of use can be moved together with a user, and is associated with location acquisition means for acquiring location information indicating the current location of the mobile reception device, and emergency alert broadcasting. The warning area acquisition means for acquiring area information for specifying the warning area, the position information acquired by the position acquisition means, and the area information acquired by the warning area acquisition means are compared, and based on the comparison result Comparing means for determining whether or not to notify an emergency warning broadcast to the user, and warning information to the user based on the emergency warning broadcast when the comparison means determines that the emergency warning broadcast should be notified to the user Warning means.

  In the mobile reception device according to the present invention, the current position information of the mobile reception device is acquired by the position acquisition means, and the area information specifying the warning area related to the emergency warning broadcast is acquired by the warning area acquisition means, and compared. The location information and the regional information are compared by the means, it is determined whether or not the emergency warning broadcast should be notified to the user based on the comparison result, and it is determined that the emergency warning broadcast should be notified to the user. Since the warning information is notified to the user based on the emergency warning broadcast by the means, only the mobile reception device existing at the position related to the warning area to be alerted by the emergency warning broadcast, that is, the user at the position related to the warning area Warning information based on emergency warning broadcasting can be provided, and even when the position of the mobile receiver moves, the warning information required by the user can be accurately obtained. It can be presented to over The.

  The mobile receiving device is configured to supply power to the position acquisition unit, the warning area acquisition unit, and the comparison unit when the comparison unit determines that an emergency warning broadcast should be notified to the user. It is preferable to further include a power control unit that switches the power state from a power state to a second power state in which power is also supplied to the warning unit in addition to the position acquisition unit, the warning area acquisition unit, and the comparison unit. .

  In this case, when it is determined that the emergency warning broadcast should be notified to the user, the position acquisition means, the warning area, from the first power supply state where power is supplied to the position acquisition means, the warning area acquisition means, and the comparison means. Since the power supply state is switched to the second power supply state in which power is supplied also to the warning means in addition to the acquisition means and the comparison means, the warning means includes a warning until it is determined that the emergency warning broadcast should be notified to the user. Electric power is not supplied, and unnecessary power consumption can be suppressed. As a result, even when the position of the mobile reception device moves, warning information required by the user can be accurately presented to the user without consuming electric power unnecessarily.

  The power supply control means switches the power supply state from the first power supply state to the second power supply state when the comparison means determines that the position of the mobile reception device is included in an alarm area, and Preferably, the means notifies the user of warning information based on an emergency warning broadcast when the comparison means determines that the position of the mobile reception device is included in the warning area.

  In this case, when it is determined that the position of the mobile reception device is included in the warning area, the power supply state is switched from the first power supply state to the second power supply state, and warning information is sent to the user based on the emergency warning broadcast. Since the notification is made, it is possible to notify the warning information only to users in the warning area.

  The warning means includes display means for displaying a broadcast video by emergency warning broadcast, and generation means for generating a broadcast video from the emergency warning broadcast and outputting it to the display means, and the warning means is moved by the comparison means. When it is determined that the position of the receiving device is included in the warning area, it is preferable to display an emergency warning broadcast video using the warning information generation means and the display means.

  In this case, when it is determined that the position of the mobile reception device is included in the warning area, the broadcast video is generated from the emergency warning broadcast and displayed on the display means. Video can be provided.

  The warning area acquisition means is a receiving means for extracting information indicating that an emergency warning broadcast is being received by receiving a digital broadcast, and an extraction means for extracting area information for specifying the warning area related to the emergency warning broadcast. Are preferably included.

  In this case, it is possible to acquire the emergency information broadcast from the digital broadcast and the area information specifying the alarm area related to the emergency alarm broadcast, and share the digital broadcast receiving circuit as the alarm area acquisition means. it can.

  The receiving means detects an emergency warning broadcast activation flag from a TMCC signal of digital broadcasting, and the power supply control means is configured to supply power to the receiving means when the receiving means detects an emergency warning broadcast activation flag. It is preferable to switch the power supply state from the third power supply state to be performed to the first power supply state.

  In this case, when the emergency warning broadcast activation flag is detected from the TMCC signal of the digital broadcast and the emergency warning broadcast activation flag is detected, the first power supply is switched from the third power supply state in which power is supplied to the receiving means. Since the power supply state is switched to the state, until the emergency alert broadcast activation flag is detected and it is detected that the emergency alert broadcast is being performed from the digital broadcast, the position acquisition means, the extraction means and the comparison means Since power supply is not performed, power consumption can be minimized.

  The warning area acquisition means transmits area information for identifying an alarm area related to an emergency warning broadcast from an emergency warning broadcast notification for notifying that an emergency warning broadcast is being performed and transmitted via a predetermined communication network. It is preferable that the communication means to acquire is included.

  In this case, the area information for identifying the alarm area to which the emergency alert broadcast is related is acquired from the emergency alert broadcast notification for notifying that the emergency alert broadcast is being performed and transmitted via the predetermined communication network. Therefore, regional information can be acquired without using a digital broadcast receiving circuit with high power consumption, and the power consumption can be further reduced.

  The comparison means determines the positional relationship between the position of the mobile receiver and the warning area by comparing the position information acquired by the position acquisition means and the area information acquired by the warning area acquisition means, The warning means preferably changes the warning information so that the warning level becomes higher according to the positional relationship between the position of the mobile reception device and the warning area determined by the comparison means.

  In this case, since the warning information is changed so that the warning level becomes higher according to the positional relationship between the position of the mobile reception device and the warning area, a warning suitable for the current position of the user with respect to the warning area is provided to the user. be able to.

  The warning means includes warning notification means for notifying a user of warning information of a first warning level and warning information of a second warning level lower than the first warning level, and the warning notification means When the comparison means determines that the position of the mobile reception device is approaching the warning area, the warning information of the first warning level is notified to the user, and the current position of the user is moved to the warning area by the comparison means. When it is determined that it is not approaching, it is preferable to notify the user of the warning information of the second warning level.

  In this case, when it is determined that the position of the mobile reception device is approaching the warning area, the user is notified of the warning information of the first warning level, and when it is determined that the position is not approaching the warning area, the first Since the warning information of the second warning level lower than the warning level is notified to the user, the warning information with a higher warning level can be provided as the user gets closer to the warning area, and the warning information is more reliably You can let the user know.

  An alarm level storage unit that stores a predetermined alarm level is further provided, and the comparison unit acquires and acquires an alarm level of the emergency alarm broadcast when the detection unit detects that the emergency alarm broadcast is being performed. When the alarm level is equal to or higher than the alarm level stored in the alarm level storage means, the warning means is preferably notified of warning information.

  In this case, since the warning information is notified when the warning level of the emergency warning broadcast is equal to or higher than the stored warning level, the warning information is not notified to the user when the stored warning level is not reached, It is possible to prevent unnecessary warning information from being provided to the user.

  A receiving method according to the present invention is a receiving method for receiving an emergency alert broadcast using a mobile receiving device that can be used together with a user, wherein the position acquisition means of the mobile receiving device A step of acquiring position information representing the position of the mobile receiver, a step of acquiring an alarm region of the mobile receiver, a step of acquiring region information specifying an alarm region related to emergency alert broadcasting, and a comparator of the mobile receiver The step of comparing the position information acquired by the position acquisition means with the area information acquired by the warning area acquisition means and determining whether or not to notify the user of an emergency warning broadcast based on the comparison result When the warning means of the mobile receiver determines that the comparison means should notify the user of an emergency alert broadcast, the user is warned based on the emergency alert broadcast. It is intended to include a step of notifying the information.

  The receiving program according to the present invention includes a mobile receiving device whose location of use can be moved together with a user, location acquisition means for acquiring location information indicating the current location of the mobile receiving device, and an alarm area related to emergency alert broadcasting. Warning area acquisition means for acquiring area information to be identified, position information acquired by the position acquisition means, and area information acquired by the warning area acquisition means are compared, and an emergency warning broadcast based on the comparison result Comparing means for determining whether or not to notify the user, and warning means for notifying the user of warning information based on the emergency warning broadcast when the comparison means determines that the emergency warning broadcast should be notified to the user. It is to function as.

  According to the present invention, the current location information of the mobile receiver is compared with the area information specifying the alarm area related to the emergency alert broadcast, and whether or not the emergency alert broadcast should be notified to the user based on the comparison result. When it is determined and it is determined that the emergency warning broadcast should be notified to the user, the warning information is notified to the user based on the emergency warning broadcast, so the position related to the warning area to be alerted by the emergency warning broadcast Warning information based on the emergency warning broadcast can be notified only to the user who is in the station, and even when the position of the mobile reception device moves, the warning information required by the user can be accurately presented to the user.

  Hereinafter, a mobile phone as an example of a mobile reception device according to each embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a mobile phone according to the first embodiment of the present invention.

  1 includes a digital broadcast antenna 11, a tuner 12, a demodulation / decoding unit 13, an AV decoder 14, a display unit 15, an emergency warning broadcast detection unit 16, a power supply control unit 17, an internal power supply 18, and a GPS antenna. 21, a position information receiving unit 22, a position information storage unit 23, a comparison unit 24, a warning determination unit 25, an alarm level storage unit 26, a speaker 27, and an operation unit 28.

  Note that the cellular phone shown in FIG. 1 incorporates each circuit that realizes a normal telephone function, but portions not directly related to the present invention are illustrated and described in detail for ease of explanation. Omitted. In addition, each of the above blocks may be configured by a dedicated circuit, or by executing a reception program for executing an emergency warning broadcast reception process, which will be described later, using a microprocessor or the like built in the mobile phone. It may be realized. These points are the same in other embodiments.

  The tuner 12 receives a terrestrial digital broadcast wave via the digital broadcast antenna 11, selects a signal of a specific frequency from the harmonic digital modulation signal, converts it to an intermediate frequency signal, demodulates and decodes 13, and Output to the emergency alert broadcast detection unit 16. As a channel selected by the tuner 12, a channel of the Japan Broadcasting Corporation that is highly likely to be multiplexed with an emergency alert broadcast is set in advance. However, the channel is not particularly limited to this example, and the channel is set at every predetermined time. Various changes such as selecting a channel including emergency alert broadcasting by sequentially switching are possible.

  The demodulation / decoding unit 13 demodulates and decodes the intermediate frequency signal and outputs a transport stream to the AV decoder 14. The AV decoder 14 converts the transport stream and outputs a video signal and an audio signal to the display unit 15. The display unit 15 displays the emergency alert broadcast video using the video signal and reproduces the emergency alert broadcast audio using the audio signal. In the above description, each block has been described by taking terrestrial digital broadcasting as an example. However, if emergency warning broadcasting is multiplexed, BS digital broadcasting and mobile broadcasting are processed in the same manner as described above.

  The emergency alert broadcast detector 16 detects an emergency alert broadcast flag of TMCC (Time Multiplexing Configuration Control: transmission multiplex control signal) from the intermediate frequency signal, and the emergency alert broadcast is detected when the emergency alert broadcast flag is “1”. On the other hand, when the emergency alert broadcast flag is “0”, it is determined that the emergency alert broadcast is not transmitted, and the determination result is output to the power supply control unit 17.

  The internal power supply 18 is composed of a lithium ion battery or the like, and constantly supplies power to the power supply control unit 17 and supplies power to a predetermined block in the apparatus according to an instruction from the power supply control unit 17. The power supply control unit 17 controls the internal power supply 18 to supply power to at least the tuner 12 and the emergency warning broadcast detection unit 16 when the apparatus main body is in the minimum power saving state which is an example of the third power supply state. When it is determined by the emergency alert broadcast detection unit 16 that no emergency alert broadcast has been sent, the minimum power saving state is maintained.

  On the other hand, when the emergency alert broadcast detection unit 16 determines that the emergency alert broadcast is being transmitted, the power state is switched from the minimum power saving state to the normal power saving state which is an example of the first power state. The internal power supply 18 is controlled so that power is also supplied to the decoding unit 13, the position information receiving unit 22, the position information storage unit 23, the comparison unit 24, the warning determination unit 25, and the alarm level storage unit 26.

  When the emergency alert broadcast detector 16 determines that an emergency alert broadcast is being transmitted, the position information receiver 22 receives GPS (Global Positioning System) radio waves transmitted from the satellite via the GPS antenna 21. The current position of the mobile phone, that is, the current position of the user is detected using a known GPS distance measurement method, and position information representing the current position is output to the position information storage unit 23. The position information storage unit 23 stores position information.

  Further, when the emergency alert broadcast detection unit 16 determines that the emergency alert broadcast is being transmitted, the demodulation / decoding unit 13 extracts PSI (Program Specific Information) from the transport stream, and stores the information in the PSI. “Start_end_flag”, “signal_level” and “area_code” are extracted from the emergency information descriptor stored in the PMT (Program Map Table) of the PMT, and the “area_code” is compared to the “al_code”, and the “al_code” is output to the v Is output to the warning determination unit 25.

  Here, the emergency information descriptor is a descriptor defined in ARIB STD-B10, and describes necessary information and functions as an emergency warning signal. “Start_end_flag” (start / end flag) is information indicating that an emergency warning broadcast is being performed, and is composed of a 1-bit flag, and is an emergency warning signal defined in Ministry of Posts and Telecommunications Publication No. 60405. Corresponds to the start signal and the end signal. When “start_end_flag” is “1”, the emergency alert signal is started or being broadcast, and when “0”, the emergency alert signal is ended.

  “Signal_level” (signal type) is information indicating the warning level of emergency warning broadcasting, is composed of a 1-bit field, and corresponds to the type of emergency warning signal defined in Article 138-2 of the Radio Station Operation Rules. Yes. When “signal_level” is “1”, it indicates that the emergency alert signal to be broadcast is the first type start signal. When “signal” is “0”, it indicates that the emergency alert signal to be broadcast is the second type start signal. Show.

  “Area_code” (area code) is area information for specifying an alarm area related to the emergency alarm broadcast, that is, an alarm area that needs to be notified of the emergency alarm broadcast, and is composed of a 12-bit field. Corresponding to the area code defined in Article 138-3, the area code assigned in accordance with the Ministry of Posts and Telecommunications Publication No. 60405 is used.

  Note that the information indicating that the emergency alert broadcast is being performed, the region information specifying the alarm region related to the emergency alert broadcast, and the information indicating the alert level of the emergency alert broadcast are not particularly limited to the above example, and are digital. Various data corresponding to the above data can be used depending on the type of broadcast.

  The comparison unit 24 reads the current position information from the position information storage unit 23, compares the current position of the mobile phone with the warning area specified by “area_code”, and outputs the comparison result to the warning determination unit 25. For example, the comparison unit 24 determines whether or not the current position of the mobile phone is within the warning area of the emergency warning broadcast, and notifies the warning determination unit 25 of the determination result. The comparison process between the current position of the mobile phone and the warning area of the emergency warning broadcast by the comparison unit 24 is not particularly limited to the above example, and the distance between the current position of the mobile phone and the warning area of the emergency warning broadcast is calculated. Various changes such as notification of the calculated distance are possible.

  The operation unit 28 includes various operation buttons such as a numeric key and a cross key. For example, the operation unit 28 is used for a user to input a reference alarm level of an emergency alarm broadcast or to set an alarm operation. The reference warning level corresponds to the warning level specified by the above “signal_level”. For example, when the user wishes to notify the emergency warning broadcast of the first type start signal (large earthquake), the user can 28 is used to input “1”. When the user wishes to notify the emergency warning broadcast of the second type start signal (tsunami), the user inputs “2” using the operation unit 28. The operation unit 28 causes the alarm level storage unit 26 to store the reference alarm level input by the user. In the present embodiment, the smaller the reference alarm level value, the higher the alarm level.

  When the reference alarm level is not stored in the alarm level storage unit 26, the warning determination unit 25 determines whether or not a warning is necessary based on the comparison result by the comparison unit 24. If the warning determination unit 25 determines that a warning is necessary, the AV decoder 14 instructs the power supply control unit 17 to switch from the normal power saving state to the warning power state in order to perform a predetermined warning operation. The display unit 15, the power control unit 17, the speaker 27, and the like are controlled to execute a warning operation.

  When the reference alarm level is stored in the alarm level storage unit 26, the warning determination unit 25 reads the reference alarm level stored in the alarm level storage unit 26, and the alarm level specified by “signal_level” is the reference alarm. It is determined whether or not the level is higher than the level, and it is determined that a warning is necessary from the comparison result of the comparison unit 24, and when the warning level specified by “signal_level” is equal to or higher than the reference warning level, the warning is required. If it is determined that the alarm level specified by “signal_level” is not equal to or higher than the reference alarm level, it is determined that the warning is unnecessary.

  For example, when “1” is stored in the alarm level storage unit 26, it is determined that a warning is necessary from the comparison result by the comparison unit 24, and only when the “signal_level” is “1”, A warning operation specified from the positional relationship between the position and the warning area and the warning level is performed. Further, when “2” is stored in the alarm level storage unit 26, when “signal_level” is “1”, the above-described warning operation is performed, and when “signal_level” is “2”, the mobile phone A warning action specified from the positional relationship between the current position and the warning area and the warning level is performed.

  Note that the reference alarm level stored in the alarm level storage unit 26 is not particularly limited to the above example, and one previously stored in the alarm level storage unit 26 at the time of manufacture or the like may be used, or a plurality of reference alarm levels may be set. Various changes such as storing and changing the warning operation for each warning level are possible.

  FIG. 2 is a diagram for explaining an example of a warning operation that can be set by the user for each alarm level. As shown in FIG. 2, when the alarm level is “1” (large earthquake) and the current position is included in the alarm area, the TV display setting for displaying the emergency alarm broadcast on the display unit 15 is fixed to “ON”. The sound level of the warning sound generated from the speaker 27 is fixed to “high”, and these setting data are stored in advance in a memory in the warning determination unit 25. In this case, the user cannot change the warning operation.

  On the other hand, when the alarm level is “1” and the current position is outside the alarm area, or when the alarm level is “2” (tsunami) and the current position is included in the alarm area, the user operates the operation unit 28. , The TV display setting can be set to “ON” or “OFF”, and the ringing level can be set to “Large” or “Small”. These setting data are stored in the warning determination unit 25 by the operation unit 28. Stored in memory.

  When the alarm level is “2” and the current position is outside the alarm area, the user uses the operation unit 28 to set the TV display setting to “on” or “off” and the ringing level to “small” or The setting data can be set to “off”, and the setting data is stored in the memory in the warning determination unit 25 by the operation unit 28.

  For example, when the TV display setting is “ON” as the warning operation, the warning determination unit 25 instructs the power supply control unit 17 to supply power to the AV decoder 14 and the display unit 15, and the internal power supply 18 After power is supplied to the AV decoder 14 and the display unit 15, the control signal CS for receiving and displaying the emergency alert broadcast on the tuner 12, the demodulation / decoding unit 13, the AV decoder 14 and the display unit 15 is output. As a result, the emergency alert broadcast is automatically displayed on the display unit 15.

  When the ringing level is “high” as a warning operation, the warning determination unit 25 instructs the power supply control unit 17 to supply power to the speaker 27, and power is supplied from the internal power supply 18 to the speaker 27. After that, the loudspeaker 27 is instructed to make the warning sound loud. As a result, the warning sound is automatically reproduced from the speaker 27 at a high volume. Even when the ringing level is “low”, the same operation as described above is performed except that the warning sound is reproduced at a low volume.

  Note that the warning operation used in the present invention is not particularly limited to the above example, and various modifications are possible, and various modifications such as enabling user settings for all combinations are possible. In this embodiment, a warning sound is generated using the speaker 27. However, the warning method is not particularly limited to this example, and is configured from a piezoelectric element or the like with or without a warning sound. The warning member may be transmitted to the user by vibrating the vibrating member. In this case, the ringing level can be used as the amplitude and / or vibration frequency of the vibration member.

  Further, the method for determining whether or not the warning is required by the warning determination unit 25 is not particularly limited to the above example, and various changes can be made. For example, as a comparison result of the comparison unit 24, it is determined that a warning is necessary when the current position of the mobile phone is within the warning area of the emergency warning broadcast, and the current position of the mobile phone is outside the warning area of the emergency warning broadcast. In some cases, it may be determined that no warning is required. In this case, the alarm level storage unit 26 is unnecessary.

  In the present embodiment, the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23 correspond to an example of a position acquisition unit. The digital broadcast antenna 11, the tuner 12, the demodulation / decoding unit 13, and the emergency warning broadcast The detection unit 16 corresponds to an example of an alarm area acquisition unit, the comparison unit 24 and the warning determination unit 25 correspond to an example of a comparison unit, and the AV decoder 14, the display unit 15, the alarm level storage unit 26, and the speaker 27 are warning units. The power control unit 17 corresponds to an example of a power control unit. The display unit 15 corresponds to an example of a display unit, the AV decoder 14 corresponds to an example of a generation unit, the digital broadcast antenna 11, the tuner 12, and the emergency warning broadcast detection unit 16 correspond to an example of a reception unit. The demodulation / decoding unit 13 corresponds to an example of an extraction unit, the speaker 27 corresponds to an example of a warning notification unit, and the alarm level storage unit 26 corresponds to an example of an alarm level storage unit.

  Next, the emergency alert broadcast receiving process of the mobile phone configured as described above will be described in detail. FIG. 3 is a flowchart for explaining emergency alert broadcast reception processing by the mobile phone shown in FIG.

  As shown in FIG. 3, when the user turns on the main power of the mobile phone and enters an emergency warning broadcast standby state, first, in step S <b> 1, the power control unit 17 goes to the tuner 12 and the emergency warning broadcast detection unit 16. The internal power supply 18 is controlled so as to supply power, and the internal power supply 18 supplies power to the tuner 12 and the emergency warning broadcast detection unit 16, and the power supply state is set to the minimum power saving state.

  Next, in step S2, the tuner 12 receives the terrestrial digital broadcast wave via the digital broadcast antenna 11, selects a signal of a specific frequency from the harmonic digital modulation signal, and gives an emergency alert to the intermediate frequency signal. The emergency alert broadcast detector 16 outputs to the broadcast detector 16 and determines whether or not the emergency alert broadcast is transmitted by detecting the TMCC emergency alert broadcast flag from the intermediate frequency signal. The emergency alert broadcast detection unit 16 determines that the emergency alert broadcast is being transmitted when the TMCC emergency alert broadcast flag is “1”, and outputs the determination result to the power supply control unit 17. When the emergency warning broadcast flag is “0”, it is determined that the emergency warning broadcast is not sent, and the process of step S2 is repeated.

  The determination as to whether or not the emergency alert broadcast is being sent is not particularly limited to the above method. For example, the demodulator / decoder 13 is used in the normal power saving state without providing the minimum power saving state. The emergency information descriptor may be detected from the PSI. In this case, the process of step S1 is omitted.

  When the emergency warning broadcast is transmitted, in step S3, the power supply control unit 17 performs the demodulation / decoding unit 13, the position information receiving unit 22, the position information storage unit 23, the comparison unit 24, the warning determination unit 25, and the alarm level storage. The internal power supply 18 is controlled so as to supply power to the unit 26, and the internal power supply 18, in addition to the tuner 12 and the emergency warning broadcast detection unit 16, the demodulation / decoding unit 13, the location information receiving unit 22, the location information storage Power is supplied also to the unit 23, the comparison unit 24, the warning determination unit 25, and the alarm level storage unit 26, and the power supply state is switched from the minimum power saving state to the normal power saving state.

  Next, in step S <b> 4, the position information receiving unit 22 receives GPS radio waves via the GPS antenna 21, detects the current position of the mobile phone, and stores position information indicating the current position in the position information storage unit 23. Remember me.

  Next, in step S5, the demodulation / decoding unit 13 extracts “start_end_flag”, “signal_level”, and “area_code” of the emergency information descriptor from the transport stream, and outputs “area_code” to the comparison unit 24. “signal_level” is output to the warning determination unit 25.

  Next, in step S6, the comparison unit 24 reads the current position information from the position information storage unit 23, determines whether or not the current position is included in the warning area specified by “area_code”, and the result is The warning determination unit 25 is notified.

  Next, in step S <b> 7, when the reference alarm level is stored in the alarm level storage unit 26, the warning determination unit 25 reads the reference alarm level stored in the alarm level storage unit 26 and identifies it by “signal_level”. It is determined whether or not the alarm level is equal to or higher than the reference alarm level, the alarm level specified by “signal_level” is equal to or higher than the reference alarm level, and the mobile phone is present in the alarm area from the comparison result of the comparison unit 24 If so, it is determined that a warning is necessary, the process proceeds to step S8, and if the alarm level specified by “signal_level” is not equal to or higher than the reference alarm level, it is determined that the warning is unnecessary. The process proceeds to step S10. When the reference alarm level is not stored in the alarm level storage unit 26, the warning determination unit 25 determines whether or not a warning is necessary based on the comparison result by the comparison unit 24.

  When it is determined that a warning is necessary, in step S8, the warning determination unit 25 specifies a warning operation to be executed from the combination of the determination result by the comparison unit 24 and the alarm level specified by “signal_level”. The power supply control unit 17 controls the internal power supply 18 so as to supply power to the blocks necessary for performing the warning. The internal power supply 18 also supplies power to the blocks necessary for performing the warning, and the power supply state is switched from the normal power saving state to the warning power supply state.

  Next, in step S9, the warning determination unit 25 controls the AV decoder 14, the display unit 15, and the speaker 27, and is specified from the combination of the determination result by the comparison unit 24 and the alarm level specified by “signal_level”. The warning action is executed.

  Next, after the process of step S9 is completed, or when it is determined that a warning is unnecessary in step S7, in step S10, the tuner 12 and the emergency warning broadcast detection unit 16 perform the same as in step S2. A flag for emergency alert broadcast of TMCC is detected to determine whether or not the emergency alert broadcast has ended. If the emergency alert broadcast flag is “1”, the emergency alert broadcast detection unit 16 determines that the emergency alert broadcast has not ended, the process returns to step S4, and the emergency alert broadcast flag is “0”. When the emergency alert broadcast is detected, the emergency alert broadcast detection unit 16 determines that the emergency alert broadcast has ended and outputs the determination result to the power supply control unit 17. Then, the process returns to step S 1, and the power supply state is the warning power supply. The state or normal power saving state is switched to the minimum power saving state, and the subsequent processing is continued.

  Through the above processing, in the present embodiment, position information indicating the current position of the mobile receiver is acquired by the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23, and the digital broadcast antenna 11, tuner 12, the demodulator / decoder 13 and the emergency alert broadcast detector 16 obtain regional information for identifying the alert area related to the emergency alert broadcast from the emergency alert broadcast, and the comparison unit 24 compares the location information with the regional information. The warning determination unit 25 determines that the user should be notified of the emergency warning broadcast when the mobile phone exists in the warning area and the warning level is equal to or higher than the reference warning level. At this time, the video and warning sound by the emergency warning broadcast are notified to the user by the AV decoder 14, the display unit 15 and the speaker 27, so the video and the warning by the emergency warning broadcasting are only given to the user in the warning area according to the warning level. Sound can be provided.

  When it is determined that the emergency alert broadcast should be notified to the user, the power supply control unit 17 switches the power state from the normal power saving state to the alarm power state, and determines that the emergency alert broadcast should be notified to the user. Until this is done, power is not supplied to the AV decoder 14, the display unit 15, and the speaker 27, so that unnecessary power consumption can be suppressed. As a result, even when the position of the mobile reception device moves, warning information required by the user can be accurately presented to the user without consuming electric power unnecessarily.

  Also, when the emergency warning broadcast activation flag is detected from the digital broadcast TMCC signal and the emergency warning broadcast activation flag is detected, the power supply state is switched from the minimum power saving state to the normal power saving state. Until the broadcast activation flag is detected and it is detected that the emergency warning broadcast is being performed from the digital broadcast, the demodulation / decoding unit 13, the position information receiving unit 22, the position information storage unit 23, the comparison unit 24, the warning Since power is not supplied to the determination unit 25 and the alarm level storage unit 26, power consumption can be suppressed to the minimum necessary.

  Next, a mobile phone according to a second embodiment of the present invention will be described. FIG. 4 is a block diagram showing the configuration of the mobile phone according to the second embodiment of the present invention.

  The mobile phone shown in FIG. 4 includes a digital broadcast antenna 11, a tuner 12a, a demodulation / decoding unit 13a, an AV decoder 14, a display unit 15, a power control unit 17a, an internal power supply 18, a GPS antenna 21, and a position information receiving unit 22. A position information storage unit 23, a comparison unit 24a, a warning determination unit 25a, a speaker 27, an operation unit 28, a communication antenna 31, a reception unit 32, and an alarm information extraction unit 33. In the following description, the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and characteristic parts of the second embodiment are mainly described.

  The tuner 12a receives a terrestrial digital broadcast wave via the digital broadcast antenna 11, selects a specific frequency signal from the harmonic digital modulation signal, and outputs an intermediate frequency signal to the demodulation / decoding unit 13a. The demodulation / decoding unit 13 a demodulates and decodes the intermediate frequency signal and outputs a transport stream to the AV decoder 14. The AV decoder 14 and the display unit 15 are configured in the same manner as in the first embodiment. Further, the demodulation / decoding unit 13a extracts the emergency information descriptor in the PSI from the transport stream, further extracts “start_end_flag” from the emergency information descriptor, and outputs it to the warning determination unit 25a.

  The location information receiving unit 22 and the location information storage unit 23 operate in the same manner as in the first embodiment. The location information receiving unit 22 receives the GPS radio wave via the GPS antenna 21 and receives the current mobile phone current. The position, that is, the current position of the user is detected, and position information representing the current position is output to the position information storage unit 23, and the position information storage unit 23 stores the position information.

  Here, in the present embodiment, an emergency alert broadcast notification is transmitted to the mobile phone via the base station by mail communication or the like from a communication network management server or a Web server of the mobile phone company. The emergency alert broadcast notification includes emergency alert broadcast information indicating that the emergency alert broadcast is being performed, and area information for identifying an alert area related to the emergency alert broadcast, that is, an alert area where the emergency alert broadcast is required. And broadcast station identification information that identifies a broadcast station that broadcasts an emergency alert broadcast.

  For example, information similar to “start_end_flag” and “area_code” can be used as emergency alert broadcast information and area information, and a broadcast station name or channel number can be used as broadcast station identification information. If the tuner 12a can automatically select a channel that broadcasts an emergency alert broadcast, the broadcast station identification information can be omitted.

  The communication antenna 31 and the reception unit 32 are used for a normal telephone call function and an Internet communication function of a mobile phone, and the reception unit 32 is transmitted from a base station of a mobile phone company via the communication antenna 31. The radio wave is received, and the received signal is output to the alarm information extraction unit 33.

  The alarm information extraction unit 33 extracts the emergency alert broadcast notification from the received signal, outputs the regional information included in the emergency alert broadcast notification to the comparison unit 24a, and identifies the emergency alert broadcast information and the broadcast station identification included in the emergency alert broadcast notification. The information is output to the warning determination unit 25a.

  The comparison unit 24a reads the current position information from the position information storage unit 23, compares the current position of the mobile phone with the warning area of the emergency alert broadcast specified by the area information included in the emergency alert broadcast notification, and compares the result. Is output to the warning determination unit 25a. For example, the comparison unit 24a determines whether or not the current position of the mobile phone is within the warning area of the emergency warning broadcast, and notifies the warning determination unit 25a of the determination result.

  When the warning determination unit 25a receives the emergency warning broadcast information from the warning information extraction unit 33, the warning determination unit 25a determines whether a warning by the emergency warning broadcast is necessary based on the comparison result of the comparison unit 24a. The warning determination unit 25a determines that a warning is necessary when the current position of the mobile phone is within the warning area of the emergency warning broadcast, and the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker The power supply control unit 17a is instructed to supply power to 27 as well.

  The determination of whether or not a warning is necessary is not particularly limited to the above example, and various changes are possible. For example, the comparison unit 24a detects the positional relationship between the current position and the warning area. A warning may be issued when the current position falls within a predetermined distance from the extension of the warning area. In this case, as the predetermined distance, a value stored in advance may be used, or the user may input a desired distance using the operation unit 28.

  Further, the warning determination unit 25a determines that the emergency warning broadcast has ended when the “start_end_flag” output from the demodulation / decoding unit 13a is “0”, and saves the power state from the warning power state. The power supply control unit 17a is instructed to switch to the state.

  The power supply control unit 17a is supplied with power from the internal power supply 18, and when the apparatus main body is in the power saving state that is the first power state, at least the position information receiving unit 22, the position information storage unit 23, the comparison unit 24a, the warning The internal power supply 18 is controlled to supply power to the determination unit 25a, the reception unit 32, and the alarm information extraction unit 33. The power supply to the position information receiving unit 22 and the position information storage unit 23 may be supplied when the alarm information extraction unit 33 detects an emergency alarm broadcast notification.

  Further, when the warning determination unit 25a determines that a warning is necessary, the power supply control unit 17a switches the power supply state from the power saving state to the warning power supply state, so that the demodulation / decoding unit 13a, the AV decoder 14, and the display The internal power supply 18 is controlled to supply power to the unit 15 and the speaker 27 as well. Thereafter, the warning determination unit 25a instructs the tuner 12a to select the channel specified by the broadcast station identification information, and the demodulation / decoding unit 13a and the AV decoder 14 cause the display unit 15 to display the emergency warning broadcast. The speaker 27 generates a warning sound. The warning operation is not particularly limited to the above example, and various modifications such as generating only a warning sound from the speaker 27 and displaying an emergency warning broadcast in response to the user's request thereafter are possible.

  Further, when instructed by the warning determination unit 25a to switch the power supply state from the warning power supply state to the power saving state, the power supply control unit 17a sends the signal to the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27. The internal power supply 18 is controlled to stop the power.

  In the present embodiment, the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23 correspond to an example of a position acquiring unit, and the communication antenna 31, the receiving unit 32, and the alarm information extracting unit 33 acquire an alarm area. The comparison unit 24a and the warning determination unit 25a correspond to an example of the comparison unit, and the digital broadcast antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27 correspond to an example of the comparison unit. The power control unit 17a corresponds to an example of a warning unit, and the power control unit 17a corresponds to an example of a power control unit. The display unit 15 corresponds to an example of a display unit, the digital broadcasting antenna 11, the tuner 12a, the demodulation / decoding unit 13a, and the AV decoder 14 correspond to an example of a generation unit, and the speaker 27 corresponds to an example of a warning notification unit. Equivalent to.

  Next, the emergency alert broadcast receiving process of the mobile phone configured as described above will be described in detail. FIG. 5 is a flowchart for explaining emergency alert broadcast reception processing by the mobile phone shown in FIG.

  As shown in FIG. 5, when the user turns on the main power supply of the mobile phone and enters an emergency warning broadcast standby state, first, in step S11, the power supply control unit 17a includes the position information receiving unit 22, the position information storage unit. 23, the comparison unit 24a, the warning determination unit 25a, the reception unit 32, and the alarm information extraction unit 33 are controlled to control the internal power supply 18, and the internal power supply 18 includes the position information reception unit 22, the position information storage unit 23. Then, power is supplied to the comparison unit 24a, the warning determination unit 25a, the reception unit 32, and the alarm information extraction unit 33, and the power supply state is set to the power saving state.

  Next, in step S12, the warning information extraction unit 33 determines whether or not an emergency warning broadcast notification is included in the reception signal received by the communication antenna 31 and the reception unit 32, and includes the emergency warning broadcast notification. If so, the local information included in the emergency alert broadcast notification is output to the comparison unit 24a, and the emergency alert broadcast information and the broadcast station identification information included in the emergency alert broadcast notification are output to the warning determination unit 25a. If the emergency alert broadcast notification is not included, the process of step S12 is repeated.

  When the emergency alert broadcast notification is included, in step S13, the position information receiving unit 22 receives the GPS radio wave via the GPS antenna 21, detects the current position of the mobile phone, and indicates the current position. Information is stored in the position information storage unit 23. Note that the acquisition timing of the current position is not particularly limited to this example, and various changes such as acquisition every predetermined period are possible.

  Next, in step S14, the comparison unit 24a reads the current position information from the position information storage unit 23, compares the current position of the mobile phone with the alarm area of the emergency alert broadcast specified by the area information, and the mobile phone. Is determined to be within the warning area of the emergency warning broadcast, and the determination result is notified to the warning determination unit 25a.

  Next, in step S15, the warning determination unit 25a determines whether or not a warning by emergency warning broadcasting is necessary based on the comparison result of the comparison unit 24a, and the current location of the mobile phone is the warning region of the emergency warning broadcasting. If it is outside, it is determined that a warning is unnecessary, the process proceeds to step S18, and if the current position of the mobile phone is within the warning area of the emergency warning broadcast, it is determined that a warning is necessary, and the process Goes to step S16.

  If it is determined that a warning is necessary, in step S16, the warning determination unit 25a controls the power supply so that power is also supplied to the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27. The power supply control unit 17a controls the internal power supply 18 to supply power to the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27, and the power supply state is saved. The power state is switched to the warning power state.

  Next, in step S17, the warning determination unit 25a instructs the tuner 12a to select the channel specified by the broadcast station identification information, and the demodulation / decoding unit 13a and the AV decoder 14 display the emergency warning broadcast. 15 and the speaker 27 generates a warning sound. At this time, the demodulation / decoding unit 13a extracts “start_end_flag” from the emergency information descriptor in the PSI and outputs it to the warning determination unit 25a.

  Next, after the processing of step S17 is completed or when it is determined in step S15 that a warning is unnecessary, the warning determination unit 25a is output from the demodulation / decoding unit 13a in step S18. By determining whether or not “start_end_flag” has become “0”, it is determined whether or not the emergency warning broadcast has ended. When the “start_end_flag” is “1”, the warning determination unit 25a determines that the emergency warning broadcast has not ended, the process returns to step S13, and the “start_end_flag” becomes “0”. After determining that the emergency warning broadcasting has ended and instructing the power supply control unit 17a to switch the power supply state from the warning power supply state to the power saving state, the process is returned to step S11, and the power supply state is changed from the warning power supply state. The mode is switched to the power saving state, and the subsequent processing is continued.

  Through the above processing, in the present embodiment, position information indicating the current position of the mobile reception device is acquired by the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23, and the communication antenna 31, the receiving unit 32 and the alarm information extraction unit 33 acquire the area information specifying the alarm area related to the emergency alarm broadcast from the emergency alarm broadcast notification, the comparison unit 24a compares the position information and the area information, and the warning determination unit 25a compares the user with the user. Is determined to be notified to the user of the emergency alert broadcast.

  At this time, since the digital broadcast antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27 are notified to the user of the video and warning sound by the emergency warning broadcast, the user is in the warning area. Only the user can be provided with the video and warning sound by the emergency warning broadcast.

  In addition, when it is determined that the emergency alert broadcast should be notified to the user, the power supply state is switched from the power saving state to the alarm power state, and until it is determined that the emergency alert broadcast should be notified to the user, the digital Since power is not supplied to the broadcasting antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27, unnecessary power consumption can be suppressed. As a result, even when the position of the mobile reception device moves, warning information required by the user can be accurately presented to the user without consuming electric power unnecessarily.

  Next, a mobile phone according to a third embodiment of the present invention will be described. FIG. 6 is a block diagram showing the configuration of a mobile phone according to the third embodiment of the present invention. The mobile phone shown in FIG. 6 differs from the mobile phone shown in FIG. 4 in that the location information storage unit 23, the comparison unit 24a, the warning determination unit 25a, and the speaker 27 are different from the current location of the mobile phone and the warning area of the emergency warning broadcast. The position information storage unit 23a, the comparison unit 24b, the warning determination unit 25b, and the LED (light emitting diode) 41 for changing the warning content to be notified to the user based on the positional relationship are changed. Since it is the same as that of the mobile phone shown in FIG. 4, a detailed description is omitted, and different points will be mainly described below.

  The LED 41 is provided at an easily viewable position on the outer surface of the mobile phone, for example, at the center of the outer surface, emits red light as a warning operation of the first warning level, and is a second lower level than the first warning level. A yellow light is emitted as a warning operation of the warning level. The number and content of warning operations with different warning levels are not particularly limited to the above example, and three or more types of light emission colors are used according to the distance between the warning area and the current position, or the number of light emitting units. Various changes such as changing the sound volume are possible, and the sound volume may be changed as in the first and second embodiments.

  The location information receiving unit 22 and the location information storage unit 23a operate in the same manner as in the second embodiment, and the location information receiving unit 22 receives the GPS radio wave via the GPS antenna 21 to The position, that is, the current position of the user is detected, and position information representing the current position is output to the position information storage unit 23a, and the position information storage unit 23a stores the position information.

  The comparison unit 24b reads the current location information from the location information storage unit 23a, compares the current location of the mobile phone with the alert area of the emergency alert broadcast specified by the area information included in the emergency alert broadcast notification, The distance between the position closest to the center position or the outer peripheral position of the current position and the current position is calculated, the calculated distance is output to the warning determination unit 25b, and the calculated distance is stored in the position information storage unit 23a together with the recording time. .

  When the warning determination unit 25b receives emergency warning broadcast information from the warning information extraction unit 33, the warning determination unit 25b determines whether or not the current distance output from the comparison unit 24b is within a preset reference distance. When the distance is within the reference distance, it is determined that the warning by the emergency warning broadcast is necessary, and when the current distance exceeds the reference distance, it is determined that the warning is unnecessary.

  When a warning is necessary, the warning determination unit 25b reads a past distance of a predetermined time before stored in the position information storage unit 23a, compares the current distance with the past distance, and compares the current distance with the past distance. Determine if you are approaching the alert area. When the user is approaching, the warning determination unit 25b supplies power to the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the LED 41 in order to perform a warning operation at the first warning level. The power supply control unit 17a is instructed, and after power is supplied, the tuner 12a is instructed to select the channel specified by the broadcast station identification information, and the demodulation / decoding unit 13a and the AV decoder 14 are controlled to perform emergency alert broadcasting. While making it display on the display part 15, LED41 is made to light-emit in red.

  On the other hand, when a warning is required but the user is moving away from the warning area, the warning determination unit 25b performs a warning operation at the second warning level, and therefore power is also supplied to the tuner 12a, the demodulation / decoding unit 13a, and the LED 41. The power supply control unit 17a is instructed to supply power, and after power is supplied, the LED 41 emits yellow light, and the tuner 12a and the demodulation / decoding unit 13a extract “start_end_flag” from the emergency information descriptor in the PSI to determine the warning. The emergency alert broadcast is not displayed on the display unit 15 although it is output to the unit 25b. If the end state of the emergency warning broadcast can be detected without using the tuner 12a and the demodulation / decoding unit 13a, the power supply to the tuner 12a and the demodulation / decoding unit 13a may be stopped.

  In this embodiment, the comparison unit 24b and the warning determination unit 25b correspond to an example of a comparison unit, and the digital broadcasting antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the LED 41 are warning units. The LED 41 corresponds to an example of a warning notification unit, and the other points are the same as in the second embodiment.

  Next, the emergency alert broadcast receiving process of the mobile phone configured as described above will be described in detail. FIG. 7 is a flowchart for explaining emergency alert broadcast reception processing by the mobile phone shown in FIG. Since the processes of steps S11 to S13 and S18 shown in FIG. 7 are the same as the processes of steps S11 to S13 and S18 shown in FIG. 5, the detailed description will be omitted, and different processes will be mainly described below.

  As shown in FIG. 7, after the processing of steps S11 to S13 is completed, in step S14a, the comparison unit 24b reads the current location information from the location information storage unit 23a, and notifies the current location of the mobile phone and the emergency alert broadcast notification. The distance to the warning area of the emergency warning broadcast specified by the area information included in the information is calculated, the calculated distance is output to the warning determination unit 25b, and the calculated distance is recorded in the position information storage unit 23a together with the recording time. Remember.

  Next, in step S15a, the warning determination unit 25b determines whether or not the current distance output from the comparison unit 24b is within the reference distance. If the current distance is within the reference distance, the warning determination unit 25b If it is determined that a warning is necessary, the process proceeds to step S15b. If the current distance exceeds the reference distance, it is determined that a warning is unnecessary, and the process proceeds to step S18.

  When it is determined that a warning is necessary, in step S15b, the warning determination unit 25b reads the past distance stored in the position information storage unit 23a, compares the current distance with the past distance, and compares the current distance with the user. Determines whether the warning area is approaching the warning area. If the user is approaching the warning area, the warning level is determined to be the first warning level, and the process proceeds to step S16a. If it is not approaching, the warning level is determined to be the second warning level, and the process proceeds to step S16b.

  When it is determined that the warning level is the first warning level, the warning determination unit 25b supplies power to the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the LED 41 in step S16a. Instructing the control unit 17a, the power supply control unit 17a controls the internal power supply 18 to supply power to the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15 and the LED 41, and the power supply state is saved. The power state is switched to the warning power state of the first warning level.

  Next, in step S17a, the warning determination unit 25b instructs the tuner 12a to select the channel specified by the broadcast station identification information, and the emergency warning broadcast is displayed by the demodulation / decoding unit 13a and the AV decoder 14 on the display unit 15. And the LED 41 emits red light, and the warning operation of the first warning level is executed. At this time, the demodulation / decoding unit 13a extracts “start_end_flag” from the emergency information descriptor in the PSI and outputs it to the warning determination unit 25b.

  On the other hand, if it is determined that the warning level is the second warning level, in step S16b, the warning determination unit 25b instructs the power supply control unit 17a to supply power to the tuner 12a, the demodulation / decoding unit 13a, and the LED 41. The power supply control unit 17a controls the internal power supply 18 so that power is also supplied to the tuner 12a, the demodulation / decoding unit 13a, and the LED 41, and the power supply state changes from the power saving state to the warning power state of the second warning level. Can be switched.

  Next, in step S17b, the warning determination unit 25b instructs the tuner 12a to select the channel specified by the broadcast station identification information, receives the emergency information descriptor “start_end_flag” from the demodulation / decoding unit 13a, The LED 41 emits yellow light, and the warning operation at the second warning level is executed. Thereafter, the process of step S18 is executed as in the second embodiment.

  Through the above processing, in this embodiment, position information indicating the current position of the mobile reception device is acquired by the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23a, and the communication antenna 31, the receiving unit 32 and the alarm information extraction unit 33 acquire the area information specifying the alarm area related to the emergency alarm broadcast from the emergency alarm broadcast notification, and the comparison unit 24b compares the position information and the area information to compare the alarm area and the mobile phone. The current distance to the position is calculated, and when the current distance is within the reference distance by the warning determination unit 25b, it is determined that the emergency warning broadcast should be notified to the user.

  At this time, the warning determination unit 25b compares the past distance stored in the position information storage unit 23a with the current distance to determine whether the mobile phone, that is, the user is approaching the warning area, and the user is warned. When not approaching the area, yellow warning light is displayed as a warning operation of the second warning level by the LED 41 and notified to the user. On the other hand, when the user is approaching the alarm area, the digital broadcasting antenna 11 and the tuner are notified. 12a, demodulating / decoding unit 13a, AV decoder 14, display unit 15 and LED 41 display the video and the red warning light by the emergency warning broadcast as the warning operation of the first warning level, so that the user is notified. The closer to the warning area, the higher the warning level can be provided, and the warning information can be notified to the user more reliably. It is possible.

  In addition, when it is determined that the emergency alert broadcast should be notified to the user, the power supply state is switched from the power saving state to the alarm power state, and until it is determined that the emergency alert broadcast should be notified to the user, the digital Since power is not supplied to the broadcasting antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, the alarm level storage unit 26, and the LED 41, unnecessary power consumption can be suppressed. As a result, even when the position of the mobile reception device moves, warning information required by the user can be accurately presented to the user without consuming electric power unnecessarily.

  Next explained is a mobile phone according to the fourth embodiment of the invention. FIG. 8 is a block diagram showing a configuration of a mobile phone according to the fourth embodiment of the present invention. The mobile phone shown in FIG. 8 differs from the mobile phone shown in FIG. 4 in that the alarm information extraction unit 33 and the warning determination unit 25a are similar to the first embodiment in that the current location of the mobile phone and the warning of the emergency warning broadcast The warning information extraction unit 33a and the warning determination unit 25c for changing the warning content to be notified to the user based on not only the positional relationship with the area but also the warning level are changed, and the warning level storage unit 26 is added. Since the other points are the same as those of the mobile phone shown in FIG. 4, detailed description thereof will be omitted, and different points will be mainly described below.

  In the present embodiment, in addition to emergency alert broadcast information, area information, and broadcast station identification information, alert level information indicating the alert level of emergency alert broadcast is included in the emergency alert broadcast notification. As the alarm level information, for example, the same information as “signal_level” can be used. In the case of “1”, it is indicated that the emergency alert signal to be broadcast is the first type start signal, and “0”. In this case, it is indicated that the emergency alert signal to be broadcast is the second type start signal.

  The alarm information extraction unit 33a detects an emergency alert broadcast notification from the received signals received by the communication antenna 31 and the reception unit 32, and outputs regional information included in the emergency alert broadcast notification to the comparison unit 24a. The emergency alert broadcast information, the broadcast station identification information, and the alert level information included in the notification are output to the alert determination unit 25c.

  As in the first embodiment, the operation unit 28 stores the reference alarm level input by the user in the alarm level storage unit 26. When the warning determination unit 25c receives emergency warning broadcast information from the warning information extraction unit 33a, the warning determination unit 25c reads the reference warning level stored in the warning level storage unit 26, and the warning level specified by the warning level information is equal to or higher than the reference warning level. If the alarm level is not equal to or higher than the reference alarm level, it is determined that the warning is unnecessary.

  When the alarm level is equal to or higher than the reference alarm level, the warning determination unit 25c determines whether or not the warning by the emergency alarm broadcast is necessary based on the comparison result of the comparison unit 24a, and the current position of the mobile phone is an emergency alarm. If it is within the broadcast warning area, it is determined that a warning is necessary, and the tuner 12a, demodulation / decoding unit 13a, AV decoder 14, display unit 15 and display unit 15 are used to switch the power state from the power saving state to the warning power state. The power supply control unit 17a is instructed to supply power to the speaker 27 as well.

  Thereafter, the warning determination unit 25c instructs the tuner 12a to select the channel specified by the broadcast station identification information, and the demodulation / decoding unit 13a and the AV decoder 14 cause the display unit 15 to display the emergency warning broadcast. The speaker 27 generates a warning sound. The warning operation is not particularly limited to the above example, and various changes can be made.

  The present embodiment corresponds to an example of an alarm area acquisition unit of the communication antenna 31, the reception unit 32, and the alarm information extraction unit 33a, the comparison unit 24a and the warning determination unit 25c correspond to an example of a comparison unit, and an alarm level. The storage unit 26 corresponds to an example of an alarm level storage unit, and the other points are the same as in the second embodiment.

  Next, the emergency alert broadcast receiving process of the mobile phone configured as described above will be described in detail. FIG. 9 is a flowchart for explaining emergency alert broadcast reception processing by the mobile phone shown in FIG. The processes in steps S11, S13, S14, and S16 to S18 shown in FIG. 9 are the same as the processes in steps S11, S13, S14, and S16 to S18 shown in FIG. The process will be mainly described.

  As shown in FIG. 9, after the process of step S <b> 11 is completed, in step S <b> 12 a, the alarm information extraction unit 33 a includes the emergency alert broadcast notification in the reception signal received by the communication antenna 31 and the reception unit 32. If the emergency alert broadcast notification is included, the local information included in the emergency alert broadcast notification is output to the comparison unit 24a, and the emergency alert broadcast information and broadcast station included in the emergency alert broadcast notification are output. The identification information and the alarm level information are output to the warning determination unit 25c. If the emergency alert broadcast notification is not included, the process of step S12a is repeated.

  Next, after the processes of steps S13 and S14 are completed, in step S15c, the warning determination unit 25c reads the reference alarm level stored in the alarm level storage unit 26, and the alarm level specified by the alarm level information is determined. Judgment whether or not the alarm level is higher than the reference alarm level, if the alarm level is not higher than the reference alarm level, or if the alarm level is higher than the reference alarm level and the current location of the mobile phone is outside the warning area of the emergency alarm broadcast If the warning is unnecessary, the process proceeds to step S18, the warning level is equal to or higher than the reference warning level, and the current position of the mobile phone is within the warning area of the emergency warning broadcast, the warning is required. And the process proceeds to step S16, and the subsequent processes are the same as those in the second embodiment.

  Through the above processing, in the present embodiment, position information indicating the current position of the mobile reception device is acquired by the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23, and the communication antenna 31, the receiving unit 32 and the alarm information extraction unit 33 acquire the area information specifying the alarm area related to the emergency alarm broadcast from the emergency alarm broadcast notification, the comparison unit 24a compares the position information and the area information, and the alarm determination unit 25c generates the alarm. The reference alarm level stored in the level storage unit 26 is read, and when the alarm level is equal to or higher than the reference alarm level and the current position of the mobile phone is within the alarm area of the emergency alarm broadcast, the emergency alarm broadcast is notified to the user. The digital broadcast antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15 and Video and alarm sound by the emergency warning broadcast by loudspeaker 27 is informed to the user. On the other hand, if the alarm level is not equal to or higher than the reference alarm level, or if the alarm level is equal to or higher than the reference alarm level and the current position of the mobile phone is outside the alarm area of the emergency alarm broadcast, the warning information is not notified to the user, It is possible to prevent unnecessary warning information from being provided to the user.

  In addition, when it is determined that the emergency alert broadcast should be notified to the user, the power supply state is switched from the power saving state to the alarm power state, and until it is determined that the emergency alert broadcast should be notified to the user, the digital Since power is not supplied to the broadcasting antenna 11, the tuner 12a, the demodulation / decoding unit 13a, the AV decoder 14, the display unit 15, and the speaker 27, unnecessary power consumption can be suppressed. As a result, even when the position of the mobile reception device moves, warning information required by the user can be accurately presented to the user according to the warning level without consuming electric power unnecessarily.

  Next explained is a mobile phone according to the fifth embodiment of the invention. FIG. 10 is a block diagram showing a configuration of a mobile phone according to the fifth embodiment of the present invention. The difference between the mobile phone shown in FIG. 10 and the mobile phone shown in FIG. 4 is that the comparison unit 24 and the alarm information extraction unit 33 acquire not only emergency alert broadcast information but also location information indicating the current location of the mobile phone. 4 is changed to the comparison unit 24c and the alarm information extraction unit 33b, and the GPS antenna 21, the position information reception unit 22, and the position information storage unit 23 are omitted, and the other points are the same as those of the mobile phone shown in FIG. Therefore, detailed description is omitted, and different points will be mainly described below.

  As in the second embodiment, the alarm information extraction unit 33b extracts the emergency alert broadcast notification from the reception signal received via the communication antenna 31 and the reception unit 32, and includes the area included in the emergency alert broadcast notification. Information is output to the comparison unit 24c, and emergency alert broadcast information and broadcast station identification information included in the emergency alert broadcast notification are output to the alert determination unit 25a. Further, the alarm information extraction unit 33b extracts position information representing the current position of the mobile phone from the received signal received via the communication antenna 31 and the reception unit 32, and outputs the position information to the comparison unit 24c. As a method for acquiring this location information, for example, a simple location information service provided by KDDI Corporation can be used. In the present embodiment, the position information storage unit is omitted, but the position information storage unit may be added when referring to past position information.

  When the comparison unit 24c receives the area information from the alarm information extraction unit 33b, the comparison unit 24c instructs the alarm information extraction unit 33b to acquire position information. The alarm information extraction unit 33b includes the communication antenna 31 and the reception unit 32. The position information representing the current position of the mobile phone is extracted from the received signal received via, and output to the comparison unit 24c. The comparison unit 24c compares the current location of the mobile phone specified by the location information with the alert area of the emergency alert broadcast specified by the regional information included in the emergency alert broadcast notification, so that the current location of the mobile phone is an emergency alert broadcast. It is determined whether it is in the warning area, and the determination result is notified to the warning determination unit 25a.

  In the present embodiment, the communication antenna 31, the receiving unit 32, and the alarm information extracting unit 33b correspond to an example of a position acquisition unit and an alarm area acquisition unit, and the comparison unit 24c and the warning determination unit 25a correspond to an example of a comparison unit. The other points are the same as in the second embodiment.

  Next, the emergency alert broadcast receiving process of the mobile phone configured as described above will be described in detail. The emergency alert broadcast receiving process according to the present embodiment is the same as the emergency alert broadcast receiving process shown in FIG. 5 and will be described with reference to FIG.

  First, after the process of step S11 shown in FIG. 5 is processed in the same manner as in the second embodiment, the alarm information extraction unit 33b receives the received signal received by the communication antenna 31 and the reception unit 32 in step S12. Whether or not an emergency alert broadcast notification is included, and if an emergency alert broadcast notification is included, the local information included in the emergency alert broadcast notification is output to the comparison unit 24c, and the emergency alert broadcast notification The included emergency alert broadcast information and broadcast station identification information are output to the warning determination unit 25a. If the emergency alert broadcast notification is not included, the process of step S12 is repeated.

  When the emergency warning broadcast notification is included, in step S13, when receiving the regional information from the warning information extraction unit 33b, the comparison unit 24c instructs the warning information extraction unit 33b to acquire the position information, The alarm information extraction unit 33b extracts position information representing the current position of the mobile phone from the reception signal received via the communication antenna 31 and the reception unit 32, and outputs the position information to the comparison unit 24c. Note that the acquisition timing of the current position is not particularly limited to this example, and various changes such as acquisition every predetermined period are possible.

  Next, in step S14, the comparison unit 24c compares the current position of the mobile phone specified by the location information with the alarm area of the emergency alert broadcast specified by the area information included in the emergency alert broadcast notification, and then compares the mobile phone. Is determined to be within the warning area of the emergency warning broadcast, and the determination result is notified to the warning determination unit 25a.

  Next, in step S15, the warning determination unit 25a determines whether or not a warning by emergency warning broadcasting is necessary based on the comparison result of the comparison unit 24c, and the current location of the mobile phone is the warning region of the emergency warning broadcasting. If it is outside, it is determined that a warning is unnecessary, the process proceeds to step S18, and if the current position of the mobile phone is within the warning area of the emergency warning broadcast, it is determined that a warning is necessary, and the process Goes to step S16. Thereafter, the processing in steps S16 to S18 is executed as in the second embodiment.

  According to the above processing, the present embodiment can obtain the same effect as the second embodiment, and not only the emergency warning broadcast notification by the communication antenna 31, the receiving unit 32, and the warning information extracting unit 33b. Since the position information indicating the current position of the mobile phone can also be obtained, the GPS antenna, the position information receiving unit and the position information storage unit can be omitted, and the configuration of the apparatus can be simplified. , Power consumption can be further reduced.

  The above embodiments can be arbitrarily combined as necessary. For example, in the first to fourth embodiments, the communication antenna 31, the receiving unit 32, and the alarm according to the fifth embodiment are used. Various changes such as obtaining position information representing the current position of the mobile phone using the information extracting unit 33b and omitting the GPS antenna 21, the position information receiving unit 22, and the position information storage unit 23 are possible.

  The mobile receiver according to the present invention can accurately present warning information required by the user to the user without using power unnecessarily even when the position of the mobile receiver moves, and is used together with the user. This is useful as a mobile reception device or the like where the place can be moved.

It is a block diagram which shows the structure of the mobile telephone by the 1st Embodiment of this invention. It is a figure for demonstrating an example of the warning operation | movement which a user can set with respect to each warning level. It is a flowchart for demonstrating the emergency alert broadcast receiving process by the mobile telephone shown in FIG. It is a block diagram which shows the structure of the mobile telephone by the 2nd Embodiment of this invention. It is a flowchart for demonstrating the emergency alert broadcast receiving process by the mobile telephone shown in FIG. It is a block diagram which shows the structure of the mobile telephone by the 3rd Embodiment of this invention. It is a flowchart for demonstrating the emergency alert broadcast receiving process by the mobile telephone shown in FIG. It is a block diagram which shows the structure of the mobile telephone by the 4th Embodiment of this invention. It is a flowchart for demonstrating the emergency alert broadcast receiving process by the mobile telephone shown in FIG. It is a block diagram which shows the structure of the mobile telephone by the 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Digital broadcasting antenna 12, 12a Tuner 13, 13a Demodulation / decoding part 14 AV decoder 15 Display part 16 Emergency warning broadcast detection part 17, 17a Power supply control part 18 Internal power supply 21 GPS antenna 22 Position information receiving part 23, 23a Position Information storage unit 24, 24a, 24b, 24c Comparison unit 25, 25a, 25b, 25c Warning determination unit 26 Alarm level storage unit 27 Speaker 28 Operation unit 31 Communication antenna 32 Reception unit 33, 33a, 33b Alarm information extraction unit 41 LED

Claims (12)

A mobile receiver that can be used with a user,
Position acquisition means for acquiring position information indicating the current position of the mobile reception device;
An alarm area acquisition means for acquiring area information for specifying an alarm area related to emergency alert broadcasting;
Comparing means for comparing the position information acquired by the position acquiring means with the area information acquired by the warning area acquiring means and determining whether or not to notify the user of an emergency warning broadcast based on the comparison result When,
A mobile receiving apparatus comprising: warning means for notifying a user of warning information based on the emergency warning broadcast when the comparison means determines that the emergency warning broadcast should be notified to the user.   From the first power state in which power supply to the position acquisition means, the warning area acquisition means and the comparison means is performed when it is determined by the comparison means that an emergency warning broadcast should be notified to the user, the position The power supply control means which switches a power supply state to the 2nd power supply state in which power supply is also performed to the warning means in addition to the acquisition means, the warning area acquisition means and the comparison means. Mobile receiver. The power control means switches the power supply state from the first power supply state to the second power supply state when the comparison means determines that the position of the mobile reception device is included in the warning area,
The warning means notifies warning information to a user based on an emergency warning broadcast when the comparison means determines that the position of the mobile reception device is included in a warning area. Mobile receiver. The warning means is
Display means for displaying broadcast video by emergency alert broadcasting;
Generating means for generating broadcast video from the emergency warning broadcast and outputting it to the display means,
The warning means displays an emergency warning broadcast video using the warning information generating means and the display means when the comparison means determines that the position of the mobile receiver is included in the warning area. The mobile receiver according to claim 3, wherein: The warning area acquisition means is
Receiving means for receiving digital broadcasting and extracting information indicating that emergency alert broadcasting is being performed;
The mobile receiving apparatus according to claim 1, further comprising an extracting unit that extracts area information for specifying an alarm area related to emergency alarm broadcasting. The receiving means detects an emergency warning broadcast activation flag from a digital broadcast TMCC signal,
The power control means switches the power supply state from the third power supply state in which power supply to the reception means is performed to the first power supply state when the reception means detects an emergency warning broadcast activation flag. The mobile reception apparatus according to claim 5, wherein:   The warning area acquisition means transmits area information for identifying an alarm area related to an emergency warning broadcast from an emergency warning broadcast notification for notifying that an emergency warning broadcast is being performed and transmitted via a predetermined communication network. The mobile receiver according to claim 1, further comprising a communication unit that acquires the information. The comparison means determines the positional relationship between the position of the mobile reception device and the warning area by comparing the position information acquired by the position acquisition means and the area information acquired by the warning area acquisition means,
The warning means changes the warning information so that the warning level becomes higher according to the positional relationship between the position of the mobile reception device and the warning area determined by the comparison means. The mobile receiver according to any one of the above. The warning means is
Warning notification means for notifying a user of warning information of a first warning level and warning information of a second warning level lower than the first warning level;
The warning notification means notifies the user of warning information of the first warning level when the comparison means determines that the position of the mobile receiver is approaching the warning area, and the comparison means notifies the user of the current information of the user. 9. The mobile receiving apparatus according to claim 8, wherein when it is determined that the position is not approaching the warning area, warning information of the second warning level is notified to the user. An alarm level storage means for storing a predetermined alarm level;
The comparison means acquires an alarm level of the emergency alarm broadcast when the detection means detects that an emergency alarm broadcast is being performed, and an alarm in which the acquired alarm level is stored in the alarm level storage means The mobile reception device according to claim 1, wherein, when the level is equal to or higher than the level, the warning unit is notified of warning information. A reception method for receiving an emergency alert broadcast using a mobile receiver that can be used with a user.
The position acquisition means of the mobile receiver acquires position information representing the current position of the mobile receiver;
The warning area acquisition means of the mobile receiver acquires area information for specifying an alarm area related to emergency warning broadcasting; and
The comparison means of the mobile receiver compares the position information acquired by the position acquisition means with the area information acquired by the warning area acquisition means, and notifies the user of an emergency warning broadcast based on the comparison result Determining whether or not to do so;
The warning means of the mobile receiver includes a step of notifying the user of warning information based on the emergency warning broadcast when the comparing means determines that the emergency warning broadcast should be notified to the user. To receive. A mobile receiver that can be used with a user
Position acquisition means for acquiring position information indicating the current position of the mobile reception device;
An alarm area acquisition means for acquiring area information for specifying an alarm area related to emergency alert broadcasting;
Comparing means for comparing the position information acquired by the position acquiring means with the area information acquired by the warning area acquiring means and determining whether or not to notify the user of an emergency warning broadcast based on the comparison result When,
A receiving program that functions as warning means for notifying a user of warning information based on an emergency warning broadcast when it is determined by the comparison means that the emergency warning broadcast should be notified to the user.

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