JP2010011032A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiver constituted so that an emergency warning is reliably viewed without immediately switching broadcast to one-segment mode when emergency warning broadcast is received during viewing. <P>SOLUTION: A mode setting part 23a instructs a broadcasting mode of full-segment or one-segment to a broadcast receiving part 22 in the case of TV broadcast. The mode setting part 23a consists of: a mode setting control part 41 which controls the mode setting part 23a; a mode storage part 42 which stores the mode of the mode setting part 23a; and a mode determination processing part 44 which determines a broadcast receiving mode. When the emergency warning broadcast is received in the full-segment mode, the mode determination processing part 44 determines the mode as the full-segment mode until the broadcast receiving part detects the end of the emergency warning broadcast, determines the mode as the one-segment mode when the broadcast receiving part detects the end of the emergency warning broadcast, and when the emergency warning broadcast is received in the one-segment mode, determines the mode as the one-segment mode as it is. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a broadcast receiver capable of receiving a plurality of television broadcast modes and capable of switching to a 1-segment mode when an emergency broadcast is received, and more particularly to a mobile phone, a notebook computer, a PDA capable of receiving a digital television broadcast. The present invention relates to a technique suitable for a portable terminal such as (Personal Digital Assistant).

  In recent years, digital television broadcasts can be received even in portable terminals such as mobile phones, notebook computers, and PDAs. Moreover, there are various broadcast modes in the digital television broadcast mode, and these portable terminals can also receive in these broadcast modes.

  In the Japanese terrestrial digital broadcasting system, one channel is divided into 13 “segments”, which are bundled together to transmit video, data, audio, and the like. High-definition broadcasting (HDTV) requires 12 segments, and normal-quality broadcasting (SDTV) requires 4 segments (hereinafter, this broadcasting mode is referred to as a full segment mode). Further, one of the 13 segments is used for mobile broadcasting (hereinafter, this broadcast mode is referred to as a 1-segment mode). 1-segment broadcasting can transmit only low-resolution images of QVGA (320 x 240 pixels) size because the bandwidth is as narrow as 1/4 of normal broadcasting, but the amount of data such as decoding required for viewing is greatly reduced. it can. Therefore, it is advantageous in terms of power saving and enables long-time viewing.

Now, an emergency warning signal is broadcast in the event of a disaster such as an earthquake, tsunami, or typhoon. In this case, it is better to be able to watch for a long time in order to grasp the situation that changes every moment. Therefore, Patent Document 1 discloses a receiving device that performs automatic switching from the full segment mode to the one segment mode when an emergency warning signal is present in the received division broadcast data.
JP 2007-31127 A

  However, in the receiving device of Patent Document 1, as soon as an emergency warning signal is received, the full-segment broadcasting mode is switched to the 1-segment mode. May occur. The reception state may be good, but otherwise, the 1-segment is also in a mode in which the image quality is inferior, and there is a high possibility that the emergency alert cannot be viewed.

  In view of such a situation, the present invention intends to provide a broadcast receiving apparatus which can reliably watch an emergency alert without immediately switching to the 1-segment mode when an emergency alert broadcast is received during viewing. Is.

The present invention provides a broadcast receiving apparatus capable of receiving TV broadcasts including emergency alert broadcasts.
A broadcast receiving unit that receives a TV broadcast in a plurality of broadcast modes including a 1-segment mode, and a mode setting unit that sets a reception broadcast mode of the broadcast receiving unit,
When the mode setting unit receives an emergency alert broadcast in a mode other than 1 segment, the mode setting unit maintains the reception broadcast mode until the broadcast receiving unit detects the end of the emergency alert broadcast, and receives when the end of the emergency alert broadcast is detected. The broadcast mode is switched to the 1 segment mode.

  Further, when the emergency alert broadcast is received in the 1-segment mode, the received broadcast mode is set to the 1-segment mode as it is.

Here, the present invention further includes a time storage unit for storing the emergency alert broadcast start time at the start of receiving the emergency alert broadcast detected by the broadcast receiver or the emergency alert broadcast end time at the end of the emergency alert broadcast. ,
When the mode setting unit detects the end of the emergency alert broadcast, the mode setting unit calculates the elapsed time from the emergency alert broadcast start time or the emergency alert broadcast end time stored in the time storage unit to the present time, and the elapsed time If it is less than the predetermined time, the reception broadcast mode is set to the 1 segment mode, and if it is not less than the predetermined time, the reception broadcast mode is set according to a predetermined mode determination rule.

Furthermore, the present invention further includes a communication function unit capable of receiving an email notifying an emergency alert, an emergency alert mail reception detecting unit for detecting that the email received by the communication function unit is an email related to an emergency alert, and the emergency When the alarm mail reception detection unit detects that the communication function unit has received an email related to an emergency alert, it has a mail time storage unit that stores the email reception time,
The mode setting unit calculates an elapsed time from the email reception time stored in the email time storage unit to the present when the emergency alert email reception detection unit detects an email related to an emergency alert, and the elapsed time is a predetermined time. If the time is less than the time, the reception broadcast mode is set to the 1 segment mode, and if the time is equal to or longer than the predetermined time, the reception broadcast mode is set according to a predetermined mode determination rule.

  According to the present invention having the above-described configuration, even if an emergency alert broadcast is received, the reception broadcast mode is not changed immediately after that, so that the screen is prevented from being disturbed and the emergency alert is not missed. Furthermore, since the reception broadcast mode is always set to the 1-segment mode after the emergency warning broadcast is completed, it is possible to view for a long time.

  In addition, even if the emergency warning broadcast ends, it is assumed that the emergency situation will continue for a predetermined period, so it will be requested in an emergency by continuing to receive in 1 segment during this period. It can meet the needs to enable long-time reception. After that time, the user can view in the desired mode.

  Also, when an emergency alert mail is received, it is assumed that an emergency situation continues for a predetermined period. During this period, when the TV reception is enabled, it is possible to meet the need for long-time reception that would be required in an emergency by receiving in one segment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a schematic view showing an embodiment of a mobile phone 10 which is a broadcast receiving apparatus according to the present invention. The mobile phone 10 includes a display unit 25 formed of a liquid crystal screen, a key input unit 28, a broadcasting antenna and a communication antenna (not shown). The display unit 25 has a TV video screen 12 and a data broadcast screen 13, and the emergency warning broadcast is displayed on the TV video screen 12.

  FIG. 2 is a block diagram showing an embodiment of the mobile phone 10. The mobile phone 10 receives a broadcast antenna 21 for receiving a TV broadcast, a TV broadcast signal including an emergency warning broadcast, a demodulation of a transport stream (TS), and video, audio, data broadcast, subtitle, PSI from the TS. (Broadcast receiving unit 22 having a function of decoding each piece of media information such as (program identification information) / SI (program arrangement information), emergency alert broadcast activation information, and the TV broadcast reception mode for the tuner of the broadcast receiving unit 22 A mode setting unit 23 for instructing, a storage unit 24 for storing control information of a mobile phone, a display unit 25 for displaying a TV image or the like by menu display or TV function activation, a speaker 26 for outputting sound, and a microphone 27 for inputting sound. A key input unit 28 for receiving key input from the user, a communication function unit 29 for controlling and executing communication of the mobile phone, and a communication antenna 30 And a control unit 31 for controlling each unit, consisting of. The storage unit 24 stores a program that causes the control unit 31 to perform operation processing, call destination address information for use as a mobile phone, channel information for TV broadcasting, and the like. The control unit 31 reads necessary information from the storage unit 24. Or work while writing.

  The mobile phone 10 can receive full-segment mode and 1-segment mode. When the user designates the TV broadcast reception mode from the key input unit 28 and inputs a desired channel, the control unit 31 that receives the instruction signal causes the broadcast reception unit 22 to receive the TV broadcast of the channel input. The broadcast receiving unit 22 receives a TV broadcast signal in the broadcast mode specified by the mode setting unit 23 via the broadcast antenna 21. Upon receiving the received TV broadcast signal, the control unit 31 processes the video signal and the audio signal included in the TV broadcast signal, displays the video on the display unit 25, and outputs the audio from the speaker 26.

  The mobile phone 10 also has a telephone function. When the user designates a telephone mode from the key input unit 28 and inputs a call partner number, the control unit 31 connects the communication antenna 30 to the communication function unit 29. Through the communication partner. If it can be connected to the other party, the control unit 31 transmits the voice input from the microphone 27 to the other party via the communication function unit 29 and the communication antenna 30, and the voice from the other party is communicated with the communication antenna 30. Output from the speaker 26 via the unit 29.

  Now, when the broadcast receiving unit 22 receives an emergency warning broadcast signal such as a disaster, the mobile phone 10 sets a broadcast mode optimal for reception. There are several embodiments in the mode setting process of the mode setting unit 23, which will be described below.

  FIG. 3 is an internal block diagram illustrating the first embodiment of the mode setting unit 23. In the case of TV broadcasting, the mode setting unit 23a according to the first embodiment instructs the broadcast receiving unit 22 to select a full-segment or 1-segment broadcasting mode. The mode setting unit 23a includes a mode setting control unit 41 that controls the mode setting unit 23a, a mode storage unit 42 that stores the mode, and a mode determination processing unit 44 that determines the broadcast reception mode. When the emergency determination broadcast is received in the full segment mode, the mode determination processing unit 44 enters the full segment mode until the broadcast reception unit detects the end of the emergency alert broadcast, and 1 when the broadcast reception unit detects the end of the emergency alert broadcast. When the emergency alert broadcast is received in the 1-segment mode, the 1-segment mode is used as it is.

  FIG. 4 is a flowchart illustrating a processing procedure in receiving an emergency warning broadcast signal of the mobile phone 10 having the mode setting unit 23a according to the first embodiment.

  Based on an instruction from the key input unit 28 by the user, the control unit 31 activates the TV function, instructs the broadcast receiving unit 22 to receive the full segment mode via the mode setting unit 23a, and receives the broadcast wave (step). S1). At this time, the control unit 31 instructs the broadcast receiving unit 22 to monitor the emergency alert broadcast signal and waits for the result (step S2). When the broadcast receiving unit 22 detects “emergency warning broadcast signal is present” (step S <b> 2; Yes), the control unit 31 is notified. The control unit 31 receives the emergency alert broadcast, and outputs the video to the display unit 25 and the sound to the speaker 26 (step S3). Thereafter, the control unit 31 instructs the broadcast receiving unit 22 to detect the end of the emergency alert broadcast, and waits for a result from the broadcast receiving unit 22 (step S4).

  When the control unit 31 receives the end of the emergency alert broadcast from the broadcast receiving unit 22 (step S4; Yes), the control unit 31 instructs the mode setting unit 23a to set the mode. The mode setting control unit 41 causes the mode determination processing unit 44 to determine the broadcast reception mode. The mode determination processing unit 44 extracts the setting mode information from the mode storage unit 42 and confirms the current reception mode (step S5).

  5 and 6 show setting mode information stored in the mode storage unit 42. FIG. As shown in FIG. 5, if the setting mode information stored in the mode storage unit 42 is “full segment”, the current reception mode is full segment, so the mode determination processing unit 44 determines the 1 segment mode. Then, the mode setting control unit 41 instructs the broadcast receiving unit 22 to receive in the 1 segment mode (step S6). The broadcast receiving unit 22 receives the signal in the 1-segment mode, and the mode setting control unit 41 stores the setting mode information “1 segment” in the mode storage unit 42 (step S7). As shown in FIG. 6, if the setting mode information stored in the mode storage unit 42 is “1 segment” in step S5, the mode determination processing unit 44 determines “1 segment”, and the mode setting control unit 41 instructs the broadcast receiving unit 22 to continue receiving 1 segment as it is, and the broadcast receiving unit 22 receives in the 1 segment mode (step S7).

  Thereafter, in preparation for emergency alert broadcasting even during reception of the 1-segment mode, the control unit 31 instructs the broadcast receiving unit 22 to monitor the emergency alert broadcast signal and waits for the result (step S8). When the broadcast receiving unit 22 detects the presence of an emergency alert broadcast signal (step S8; Yes), it notifies the control unit 31. The control unit 31 returns to step S3, receives the emergency alert broadcast, and outputs the video to the display unit 25 and the sound to the speaker 26. Thereafter, the same operation is repeated. If the broadcast receiving unit 22 does not detect the presence of an emergency warning broadcast signal (step S8; No), the process returns to step S7 and continues to receive one segment.

  In this way, even if an emergency warning broadcast signal is detected, the emergency broadcast broadcast is switched from full segment to 1 segment without switching the reception broadcast mode. Since it is a full segment mode with good image quality, it will be possible to watch for a long time without losing sight of the emergency alert and after the emergency alert broadcast.

  In the first embodiment, the broadcast mode is switched after the emergency alert broadcast is finished. However, one emergency alert broadcast program is temporarily finished, and another emergency alert broadcast program is subsequently started. “Emergency alert broadcasting continues, but the program changes” (1) Switch to 1-segment mode when the previous program ends, (2) Do not switch during emergency alert broadcast You may be able to select.

  In the second embodiment, after receiving the emergency warning broadcast, when the TV viewing is once ended and then the function of the broadcast receiving unit 22 is newly activated, the broadcast receiving unit 22 is operated according to the mode determined by the mode determination rule. An example will be described.

FIG. 7 is an internal block diagram illustrating the second example of the mode setting unit 23.
The mode setting unit 23b stores a broadcast start time when the broadcast receiving unit 22 receives an emergency warning broadcast, a mode setting control unit 41 that controls the mode setting unit 23b, a mode storage unit 42 that stores a broadcast reception mode. It comprises a time storage unit 43 and a mode determination processing unit 44 for determining a broadcast reception mode. Here, when the end of the emergency alert broadcast is detected, the mode determination processing unit 44 calculates the elapsed time from the emergency alert broadcast start time or the emergency alert broadcast end time stored in the time storage unit 43 to the present time, If the elapsed time is less than the predetermined time, the reception broadcast mode is determined as the 1-segment mode, and if it is equal to or longer than the predetermined time, the reception broadcast mode is determined according to a predetermined mode determination rule.

  FIG. 8 is a flowchart illustrating a processing procedure in receiving an emergency warning broadcast signal of the mobile phone 10 having the mode setting unit 23b according to the second embodiment.

  In response to an instruction from the key input unit 28 by the user, the control unit 31 activates the TV function (step S11). At this time, the control unit 31 instructs the mode setting unit 23b to set the mode. The mode setting control unit 41 of the mode setting unit 23b reads the emergency alert broadcast start time (see FIG. 9) from the time storage unit 43. The presence / absence of emergency broadcast reception history can be determined from the presence / absence of time recording (step S12). When there is no history (step S12; No), the setting mode information stored in the mode storage unit 42, that is, the current setting mode is received (step S19). When there is a history (step S12; Yes), the mode setting control unit 41 instructs the mode determination processing unit 44 of the mode setting unit 23b to determine the broadcast reception mode. The mode determination processing unit 44 calculates the difference between the current time and the emergency alert broadcast start time to obtain the elapsed time (step S13). It is determined whether the elapsed time is within a specified time (step S14). If the elapsed time is within the specified time (step S14; Yes), the mode determination processing unit 44 determines the broadcast reception mode to be “1 segment”. The mode setting control unit 41 stores the 1-segment reception mode in the mode storage unit 42 (see FIG. 6) and simultaneously instructs the broadcast reception unit 22 to receive 1-segment (step S15). The broadcast receiving unit 22 receives in the 1 segment mode (step S16).

  When the elapsed time exceeds the specified time (step S14; No), the mode determination processing unit 44 determines a mode based on the mode determination rule. As a mode determination rule, for example, “the mode at the time of previous viewing (full segment or 1 segment) is set as the setting mode” is available. The mode setting control unit 41 continuously stores and holds the mode at the time of the previous viewing in the mode storage unit 42 as setting mode information (see FIG. 5 or FIG. 6), and at the same time, the mode reception controller 22 stores the mode. An instruction is given (step S18). The broadcast receiving unit 22 receives in the setting mode (step S19).

  In steps S17 and S20, the control unit 31 prepares for emergency alert broadcasting while continuing reception, instructs the broadcast receiving unit 22 to monitor the emergency alert broadcast signal, and waits for the result. When the broadcast receiving unit 22 detects the presence of an emergency warning broadcast signal, it notifies the control unit 31. The control unit 31 receives the emergency alert broadcast, and outputs the video to the display unit 25 and the sound to the speaker 26 (step S3 in FIG. 4).

  In the second embodiment, it is assumed that the emergency situation continues within a predetermined period (predetermined time) from the reception of the emergency warning broadcast. It is possible to meet the need for long-time reception that would be required. When the predetermined period is exceeded, there is no longer a need for the 1-segment mode with inferior image quality, so the mode is determined according to the mode determination rule set in advance by the user from the key input unit 28.

  Moreover, in Example 2, although the time memorize | stored in the time memory | storage part 43 was described as emergency alert broadcast start time, you may use emergency alert broadcast end time. At this time, when the broadcast receiving unit 22 detects the end of the emergency alert broadcast after receiving the emergency alert broadcast, the emergency alert broadcast end time is stored in the time storage unit 43 as shown in FIG.

  In the third embodiment, an example of a mobile phone that operates in the same manner as in the second embodiment when receiving a case in which an emergency alert is notified by means other than the emergency alert broadcast when the TV function is inactive is described. .

  The TV function non-operational state is a state in which the TV cannot be viewed because the reception environment where the terminal is placed has deteriorated, or a state in which the terminal does not start the TV that is not automatically activated for emergency alert broadcasting. Suppose.

  In this embodiment, the internal block configuration of the mode setting unit 23 in FIG. 2 is configured as shown in FIG.

The mode setting unit 23c includes a mode setting control unit 41 that controls the mode setting unit 23c, a mode storage unit 42 that stores the broadcast reception mode, and a mail that receives an emergency alert when the mail is received by the communication function unit 29 (this) Hereinafter, the emergency alert mail reception detecting unit 45 for determining whether or not the emergency alert mail is received, the time storage unit 43 for storing the mail reception time when the emergency alert mail is received, the mode determination processing unit 44 for determining the broadcast reception mode, Consists of. Here, when the emergency alert mail reception detection unit 45 detects an emergency alert mail, the mode determination processing unit 44 calculates an elapsed time from the mail reception time stored in the time storage unit 43 to the present, If the time is less than the predetermined time, the reception broadcast mode is determined as the 1-segment mode. If the time is equal to or longer than the predetermined time, the reception broadcast mode is determined according to a predetermined mode determination rule.
Note that the mode setting control unit 41, the mode storage unit 42, the time storage unit 43, and the mode determination processing unit 44 naturally perform the processing operations described in the second embodiment when the TV function is operating.

  FIG. 11 is a flowchart illustrating a processing procedure in receiving an emergency warning broadcast signal of the mobile phone 10 having the mode setting unit 23c according to the third embodiment.

  The control unit 31 is in a state where the TV function is not activated in the standby mode, or cannot be received due to a bad reception environment even when the TV is activated (step S31). At this time, when the communication function unit 29 receives the mail, the control unit 31 sends the mail to the mode setting unit 23c and instructs to determine whether it is an emergency warning mail (step S32). The mode setting control unit 41 of the mode setting unit 23c causes the emergency alert mail reception detection unit 45 to determine whether it is an emergency alert mail or not, and the emergency alert mail reception detection unit 45 determines that the received mail is an emergency alert mail (step S32; Yes), the mode setting control unit 41 stores the reception time of mail reception in the time storage unit 43 of the mode setting unit 23c as shown in FIG. 12 (step S33). Thereafter, the control unit 31 waits for a user's operation of the key input unit 28 or a TV function activation request such as a viewing reservation (step S34).

  If there is no activation request (step S34; No), the process returns to step S32. If no emergency alert mail is detected (step S32; No), the process goes to step S34 to wait for a TV function activation request. When there is a TV function activation request (step S34; Yes), the mode setting control unit 41 of the mode setting unit 23c reads the emergency alert mail reception time from the time storage unit 43. The presence / absence of an emergency alert mail reception history can be determined from the presence / absence of time recording (step S35). When there is no history (step S35; No), the setting mode information is read from the mode storage unit 42 and received in the currently set mode (step S42).

  When there is a history (step S35; Yes), the mode setting control unit 41 instructs the mode determination processing unit 44 of the mode setting unit 23c to determine the broadcast reception mode. The mode determination processing unit 44 calculates the difference between the current time and the emergency alert mail reception time to obtain the elapsed time (step S36).

  It is determined whether the elapsed time is within a specified time (step S37). When the elapsed time is within the specified time (step S37; Yes), the mode determination processing unit 44 determines the broadcast reception mode to be “1 segment”. The mode setting control unit 41 stores the 1-segment reception mode in the mode storage unit 42 (see FIG. 6) and simultaneously instructs the broadcast reception unit 22 to receive 1-segment (step S38). The broadcast receiving unit 22 receives in the 1 segment mode (step S39).

  When the elapsed time exceeds the specified time (step S37; No), the mode determination processing unit 44 determines a mode based on the mode determination rule. As a mode determination rule, for example, “the mode at the time of previous viewing (full segment or 1 segment) is set as the setting mode” is available. The mode setting control unit 41 continuously stores and holds the mode at the time of the previous viewing in the mode storage unit 42 as setting mode information (FIG. 6 or FIG. 7), and simultaneously instructs the broadcast receiving unit 22 on the mode. (Step S41). The broadcast receiving unit 22 receives in the setting mode (step S42).

  In steps S40 and S43, the control unit 31 prepares for emergency alert broadcasting while continuing reception, instructs the broadcast receiving unit 22 to monitor the emergency alert broadcast signal, and waits for the result. When the broadcast receiving unit 22 detects the presence of an emergency warning broadcast signal, it notifies the control unit 31. The control unit 31 receives the emergency alert broadcast, and outputs the video to the display unit 25 and the sound to the speaker 26 (step S3 in FIG. 4).

  Even if the TV function is inactive, such as when the TV cannot be viewed because the reception environment where the terminal is placed has deteriorated, or when the TV is not activated by a terminal that does not support automatic activation for emergency alert broadcasting, Emergency warning mail can be received via communication.

  When an emergency alert mail is issued, it is assumed that an emergency situation continues for a predetermined period. During this period, when the TV reception is enabled, it is possible to meet the need for long-time reception that would be required in an emergency by receiving in one segment.

  In the third embodiment, in addition to the emergency alert mail, the present invention can be similarly applied to a case where an emergency alert broadcast end mail that is a mail notifying the end of the emergency alert broadcast is received. Therefore, the emergency alert mail reception detection unit 45 detects an email related to an emergency alert such as an emergency alert email or an emergency alert broadcast end email, and the time storage unit 43 stores the email reception time.

  If the TV reception status is poor and TV viewing is completely impossible, the processing of the third embodiment is applied. However, even in the case of a reception status where TV viewing is possible or impossible. Priority is given to the processing of the third embodiment. When an emergency alert mail is received when TV viewing is completely possible, the user sets the mode in advance to determine whether to apply Example 2 or Example 3, and performs processing according to it.

It is a general-view figure which shows one Embodiment of the mobile telephone which is the broadcast receiver which concerns on this invention. It is a block diagram which shows one Embodiment of a mobile telephone. It is an internal block diagram which shows Example 1 of a mode setting part. 3 is a flowchart illustrating a processing procedure in receiving an emergency warning broadcast signal of a mobile phone having a mode setting unit according to the first embodiment. It is a figure which shows the setting mode information memorize | stored in the mode memory | storage part. It is a figure which shows the other setting mode information memorize | stored in the mode memory | storage part. It is an internal block diagram which shows Example 2 of a mode setting part. It is a flowchart which shows the process sequence in the emergency alert broadcast signal reception of the mobile telephone which has the mode setting part of Example 2. It is a figure which shows the start time and end time of emergency alert broadcast. It is an internal block diagram which shows Example 3 of a mode setting part. 10 is a flowchart illustrating a processing procedure in receiving an emergency warning broadcast signal of a mobile phone having a mode setting unit according to a third embodiment. It is a figure which shows the reception time of an emergency alert mail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cellular phone 12 Video screen 13 Data broadcast screen 21 Broadcast antenna 22 Broadcast receiving unit 23, 23a, 23b, 23c Mode setting unit 24 Storage unit 25 Display unit 26 Speaker 27 Microphone 28 Key input unit 29 Communication function unit 30 Communication antenna 31 Control unit 41 Mode setting control unit 42 Mode storage unit 43 Time storage unit 44 Mode determination processing unit 45 Emergency warning mail reception detection unit

Claims (4)

In a broadcast receiver capable of receiving TV broadcasts including emergency alert broadcasts,
A broadcast receiving unit for receiving TV broadcasts in a plurality of broadcast modes including 1-segment mode;
A mode setting unit for setting a reception broadcast mode of the broadcast receiving unit;
Have
The mode setting unit
When an emergency warning broadcast is received in a mode other than 1 segment, the reception broadcast mode is maintained until the broadcast receiving unit detects the end of the emergency alert broadcast, and when the end of the emergency alert broadcast is detected, the reception broadcast mode is changed to the 1 segment mode. A broadcast receiver characterized by switching.   The broadcast receiving apparatus according to claim 1, wherein when an emergency warning broadcast is received in the 1-segment mode, the received broadcast mode is set to the 1-segment mode as it is. A time storage unit for storing an emergency alert broadcast start time at the start of emergency alert broadcast reception detected by the broadcast receiver or an emergency alert broadcast end time at the end of the emergency alert broadcast;
The mode setting unit
When the end of the emergency alert broadcast is detected, the elapsed time from the emergency alert broadcast start time or the emergency alert broadcast end time stored in the time storage unit to the present is calculated, and the elapsed time is less than a predetermined time 3. The broadcast receiving apparatus according to claim 1, wherein the reception broadcast mode is set to a 1-segment mode, and the reception broadcast mode is set according to a predetermined mode determination rule if the predetermined time is exceeded. A communication function unit capable of receiving an email to notify an emergency alert;
An emergency alert mail reception detection unit that detects that the email received by the communication function unit is an email related to an emergency alert; and
If the emergency alert mail reception detection unit detects that the communication function unit has received an email related to an emergency alert, an email time storage unit that stores the email reception time;
Have
The mode setting unit
When the emergency alert mail reception detection unit detects an email related to an emergency alert, calculate the elapsed time from the email reception time stored in the email time storage unit to the present, if the elapsed time is less than a predetermined time, 4. The broadcast receiving apparatus according to claim 1, wherein the receiving broadcast mode is set to a 1-segment mode, and the receiving broadcast mode is set according to a predetermined mode determination rule if the time is equal to or longer than a predetermined time.

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