JP4332782B2 - Emergency warning broadcast receiver - Google Patents

Description

  The present invention relates to an emergency warning broadcast receiving apparatus, and is suitable for application to, for example, a digital television receiver.

  In recent years, in a digital television receiver, a broadcast wave transmitted from a digital television broadcast station is received by an antenna and a receiving unit, and a broadcast signal of a channel selected by a user is demodulated, so that A normal program (hereinafter referred to as a normal program) is output.

  By the way, in the case of a disaster such as an earthquake or typhoon, a digital television broadcasting station broadcasts an emergency warning program of emergency and important contents and the emergency warning program as an emergency warning broadcast to be broadcast instead of a normal program. A notification signal for notification is transmitted.

Therefore, the digital television receiver is always monitored for the presence or absence of a notification signal. When this notification signal is detected in the power off state, the digital television receiver automatically switches from the power off state to the power on state. An emergency warning program is output (see, for example, Patent Document 1).
JP 2003-18673 A (page 7, FIG. 2)

  By the way, in a digital television receiver having such a configuration, when a notification signal from a digital television broadcasting station is detected, the power is switched from the power-off state to the power-on state unconditionally. There was a problem that the alarm program continued to be output and the power was wasted.

  The present invention has been made in consideration of the above points, and an object of the present invention is to propose an emergency alert broadcast receiving apparatus that further reduces wasteful power consumption when a user is not viewing an emergency alert program.

  In order to solve such a problem, in the present invention, a receiving means for receiving a broadcast wave including an emergency warning program transmitted from a broadcasting station and a notification signal indicating that the emergency warning program is being transmitted; A notification signal detecting means for detecting a notification signal, an information output means for extracting and outputting an emergency warning program from a broadcast wave, a time elapsed since the output of the emergency warning program was started, and a predetermined time has elapsed. By providing a control means for forcibly stopping the power supply to the information output means at the time, it is possible to prevent the emergency warning program from being continuously output in vain when the user is absent, thereby reducing power consumption. can do.

  According to the present invention, it is possible to realize an emergency alarm broadcast receiving apparatus that prevents an emergency alarm program from being output in vain when a user is absent, and further reduces unnecessary power consumption.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Configuration of Digital Television Receiver As shown in FIG. 1, the digital television receiver 1 as an emergency warning broadcast receiver is controlled in an integrated manner by a control unit 2 having a CPU (Central Processing Unit) configuration. A broadcast wave from a digital television broadcasting station (not shown) is received by the antenna 6 and input to the tuner 7A of the receiving unit 7 as a reception signal S1.

  Here, the tuner 7A selects a channel designated by the user via the operation unit 3 from a plurality of broadcast frequency bands (so-called channels), and further selects a sub-channel in the channel as necessary. Then, the reception data D2 of the selected channel or subchannel is sent to the demultiplexer 8 of the output processing unit 5.

  Subsequently, the digital television receiver 1 separates the video data D3 and the audio data D4 from the received data D2 by the demultiplexer 8, and then converts the video data D3 to a video signal by the video processor 9, and also the audio processor 10 converts the audio data D4 into an audio signal, displays video from the monitor 11, and outputs audio from the speaker 12, thereby providing a normal program.

  By the way, when transmitting important emergency information related to disasters such as earthquakes and typhoons, digital television broadcasting stations transmit an emergency warning program instead of a normal program being broadcast on a subchannel of a certain channel. .

  At this time, the digital television broadcasting station transmits an emergency warning program instead of the normal program via the subchannel in the same manner as the normal program, and further notifies the notification signal SD via a dedicated subchannel (hereinafter referred to as a notification channel). Has been made to send. The role of the notification signal SD indicates that the emergency alert program is being transmitted and at the same time the subchannel number that is transmitting the emergency alert program.

  Therefore, since the digital television receiver 1 needs to detect the notification signal SD even in the power-off state, the digital television receiver 1 receives power from an external commercial power supply (not shown) and receives the tuner 7A and the receiver 7 Only the notification signal detection circuit 7B and the control unit 2 are always kept in a standby state.

  Thus, the digital television receiver 1 monitors whether or not the notification signal SD is included in the reception signal S1 from the tuner 7A, and when the notification signal SD is detected, the digital television receiver 1 controls the notification signal SD. 2 is sent out.

  As a result, the control unit 2 of the digital television receiver 1 can recognize that the emergency alarm program is transmitted by the supply of the notification signal SD from the notification signal detection circuit 7B, and the power supply control unit 4 performs output processing. By supplying power to the unit 5, all the circuits of the output processing unit 5 are operated to switch the digital television receiver 1 from the power-off state to the power-on state, and the emergency warning program can be automatically output. It is made like that.

(2) Emergency warning program output processing procedure In practice, the digital television receiver 1 is configured to stop the output after a predetermined time from detecting the notification signal SD and outputting the emergency warning program. The emergency warning program output processing procedure will be described in detail with reference to the flowchart of FIG.

  That is, the control unit 2 of the digital television receiver 1 enters from the start step of the routine RT1 and proceeds to step SP1. In step SP1, when the notification signal detection circuit 7B detects the notification signal SD of the notification channel, the control unit 2 proceeds to the next step SP2.

  In step SP2, the control unit 2 operates the entire circuit of the output processing unit 5 by supplying power to the output processing unit 5 by the power supply control unit 4 in response to the detection of the notification signal SD, and the digital television. The receiver 1 is switched from the power-off state to the power-on state, and the process proceeds to the next step SP3.

  In step SP3, the control unit 2 separates the notification data D5 from the reception data D2 by the demultiplexer 8, and then acquires the result of analyzing the notification signal SD included in the notification data D5 by the data processing unit 13, thereby By recognizing the subchannel number to which the alarm program is transmitted and selecting the subchannel of the subchannel number, the emergency alarm program is output through the monitor 11 and the speaker 12, and the process proceeds to the next step SP4.

  In step SP4, as shown in FIG. 3, the control unit 2 generates a question window QW by the video processing unit 9, and further generates a composite image VM by overlaying the question window QW on the emergency warning program image VD. The composite image VM is displayed on the monitor 11, and the process proceeds to the next step SP5.

  Here, in the question window QW, a notification message to the user that the digital television receiver 1 has received the emergency warning program is displayed, and the user continues to watch the emergency warning program as it is. Whether or not to continue watching? (Hereinafter referred to as a question message) and a continuation button BT with a GUI (Graphical User Interface) display are displayed and continue to watch as it is In this case, the user is prompted to press the continuation button BT.

  At this time, the control unit 2 waits for the continuation button BT to be pressed via a “decision” button provided on a remote controller (not shown) of the operation unit 3.

  In step SP5, the control unit 2 starts outputting the emergency warning program so as to switch the digital television receiver 1 to the power-off state after a standby time TW (for example, 15 minutes) has elapsed since the output of the emergency warning program started. Subsequent elapsed time TP measurement processing is started, and the process proceeds to the next step SP6.

  In step SP6, the control unit 2 determines whether or not the notification signal detection circuit 7B continues to detect the notification signal SD. If an affirmative result is obtained here, this means that an emergency warning program is still being transmitted from the digital television broadcasting station. At this time, the control unit 2 supplies power to the output processing unit 5. Continue to output the emergency alert program, and proceed to the next step SP7.

  On the other hand, if a negative result is obtained in step SP6, this indicates that the emergency warning program from the digital television broadcasting station has already ended. At this time, the control unit 2 proceeds to the next step SP8. Move.

  In step SP7, the control unit 2 determines whether or not the elapsed time TP after the start of output of the emergency warning program exceeds the standby time TW. If a negative result is obtained here, since the elapsed time TP has not yet exceeded the standby time TW, the user continues to press the continuation button BT while the power supply to the output processing unit 5 is continued. This means that it is necessary to wait. At this time, the control unit 2 moves to the next step SP9.

  On the other hand, if a positive result is obtained in step SP7, this means that the continuation button BT of the question window QW displayed on the monitor 11 has not been pressed although the elapsed time TP has already exceeded the standby time TW, that is, This means that there is a high possibility that the user is absent and the emergency warning program is not viewed. At this time, the control unit 2 moves to the next step SP8.

  In step SP8, the control unit 2 deletes the question window QW via the video processing unit 9 and ends the measurement process of the elapsed time TP. Subsequently, the process proceeds to step SP12 and the power control unit 4 supplies power to the output processing unit 5. By forcibly stopping the supply, the digital television receiver 1 is switched from the power-on state to the power-off state, and the process proceeds to step SP13 to finish the emergency warning program output processing procedure.

  On the other hand, in step SP9, the control unit 2 determines whether or not the continuation button BT of the question window QW has been pressed. If a positive result is obtained here, this indicates that the user has indicated the intention to continue viewing the emergency alert program, and at this time, the control unit 2 continues to supply power to the output processing unit 5, The process proceeds to the next step SP10 while continuing to output the emergency warning program.

  On the other hand, if a negative result is obtained in step SP9, this indicates that the user has not yet pressed down the continuation button BT. At this time, the control unit 2 causes the monitor 11 to display the question window QW. Returning to step SP6 as described above.

  In step SP10, similarly to step SP8, the control unit 2 deletes the question window QW displayed on the monitor 11 via the video processing unit 9, ends the elapsed time TP measurement process, and proceeds to the next step SP11. Move.

  In step SP11, the control unit 2 waits until receiving an instruction (so-called power-off command) to end the output of the emergency warning program by the user while continuing the output of the emergency warning program according to the user's intention to view, When an instruction to finish is received, the process proceeds to the next step SP12.

  Incidentally, the control unit 2 is configured to continue outputting the normal program even when the emergency alarm program ends and switches to the normal program when the emergency alarm program is output in step SP11. The emergency alert program and the normal program thereafter are not disturbed.

  In step SP12, the control unit 2 accepts the power-off command, so that the power supply control unit 4 forcibly stops the power supply to the output processing unit 5, thereby turning the digital television receiver 1 from the power-on state to the power-off state. Then, the process proceeds to the next step SP13, and the emergency warning program output processing procedure is terminated.

  Even if the emergency warning program has ended, the digital television receiver 1 does not correctly detect the end of the notification signal SD due to the influence of the radio wave condition or the like, but when the standby time TW has elapsed. The power supply can be switched to the off state reliably.

  Further, the digital television receiver 1 is configured to execute the emergency alarm program output processing procedure of the routine RT1 only once for one emergency alarm program, and therefore, automatically after the standby time TW has elapsed. Even if the emergency alarm program is still received after switching to the power-off state (steps SP7-SP8-SP12), the switching process between the power-off state, the power-on state, and the power-off state is repeated twice or more. Power consumption is not performed.

(3) Operation and effect In the above configuration, the digital television receiver 1 forcibly stops the power supply to the output processing unit 5 when the standby time TW has elapsed since the output of the emergency warning program was started. Can be automatically switched from the power-on state to the power-off state, so that when no user is watching and nobody is watching, the emergency warning program does not continue to be output until the end of the emergency warning program, further reducing unnecessary power consumption. can do.

  Even if the digital television receiver 1 does not accept the pressing operation of the continuation button BT by the user, the digital television receiver 1 detects the time when the input waiting time TW has elapsed since the emergency warning program started or the notification signal SD. Since the power supply to the output processing unit 5 can be stopped at the earlier timing of the time when it disappears, the power-on state is switched from the power-on state to the power-off state when the emergency warning program ends even before the standby time TW elapses. The useless power consumption can be further reduced.

  On the other hand, only when the user presses down the continuation button BT, the digital television receiver 1 uses the detection result of the elapsed time TP and the notification signal SD after starting the output of the emergency warning program. Regardless, by continuing the power-on state, it is possible to continue outputting the emergency alert program (and the subsequent normal program).

  According to the above configuration, the digital television receiver 1 forcibly stops the power supply to the output processing unit 5 when the standby time TW elapses after the output of the emergency warning program is started, and the power is on. By switching from the power-off state to the power-off state, it is possible to further reduce wasteful power consumption in the absence of the user.

(4) Other Embodiments In the above-described embodiment, the case where the question window QW is displayed on the monitor 11 at the same time as the display of the emergency warning program is described. However, the present invention is not limited to this. The question window QW may be displayed on the monitor 11 at a timing such as 3 minutes before the end of the standby time TW. In this case, the entire emergency alert program image VD can be displayed on the monitor 11 without any hiding between the start of the display of the emergency alert program and the display of the question window QW.

  Further, in the above-described embodiment, the case where the question window QW is displayed in a state of being superimposed on the central portion of the emergency warning program image VD has been described (FIG. 3), but the present invention is not limited to this, The question window QW may be displayed with transparency, or the question window QW may be displayed small, for example, in the lower left corner of the emergency alert program image VD, or the emergency alert program image VD may be made easier to see. The question window QW may be displayed on the entire screen or the emergency warning program image VD may not be displayed so that the question window QW can be easily seen.

  Furthermore, in the above-described embodiment, the case where the continuation button BT is displayed in the question window QW has been described (FIG. 3). However, the present invention is not limited to this, for example, a remote controller (not shown) of the operation unit 3 In addition to displaying the question message and the continuation button BT in the question window QW, an operation such as “Press the continuation of viewing button on the remote control to continue viewing” is provided. A guidance message may be displayed.

  Further, in the above-described embodiment, the case where the question window QW is displayed on the monitor 11 when the digital television receiver 1 notifies the user that the emergency warning program has been received has been described. However, the present invention is not limited thereto, and at the same time that the question window QW is displayed on the monitor 11, a warning sound or voice guidance is output from the speaker 12, or a lamp or the like provided in advance on the digital television receiver 1 is blinked. Or, a plurality of these methods may be combined.

  Accordingly, the digital television receiver 1 can further reliably notify the user that the emergency alert program is being received by further raising the user's attention, and also in the question window QW. Since the message can be more surely recognized by the user, as a result, an operation input reflecting the user's intention to view can be received.

  Furthermore, in the above-described embodiment, the case where the standby time TW is set to 15 minutes in advance has been described. However, the present invention is not limited to this, and the user can select from a plurality of candidates. Alternatively, the numerical value may be directly set by the user for 5 minutes or 3 minutes.

  Further, in the above-described embodiment, the case where the present invention is applied to the digital television broadcast receiver 1 using an external commercial power source has been described. However, the present invention is not limited to this, and an internal battery is used. The present invention may be applied to a portable digital television receiver or a mobile phone equipped with a digital television receiving circuit. In this case, the limited battery capacity can be effectively used by suppressing wasteful power consumption, and the usable time of the portable digital television receiver, the portable telephone, etc. can be extended.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to the digital television receiver 1 has been described. However, the present invention is not limited to this, and a desktop computer equipped with a digital television receiving circuit or You may make it apply with respect to other various electronic devices, such as a notebook computer.

  Further, in the above-described embodiment, the case where the present invention is applied to the digital television receiver 1 has been described. However, the present invention is not limited to this, and an emergency warning program such as a digital radio receiver is defined. The present invention may be applied to other broadcast format receivers.

  Further, in the above-described embodiment, the tuner 7A as the receiving means, the notification signal detection circuit 7B as the notification signal detecting means, the output processing section 5 as the information output means, the control section 2 as the control means, and the power source The case where the emergency warning broadcast receiving apparatus is configured by the control unit 4 has been described. However, the present invention is not limited to this, and receiving means, notification signal detecting means, information output means, control, and other various circuit configurations are also included. You may make it comprise an emergency alert broadcast receiver by a means.

  The present invention can also be applied to a digital television tuner, a digital video deck, or the like that can control the power supply of a connected display device.

It is a rough-line block diagram which shows the circuit structure of a digital television receiver. It is a flowchart which shows an emergency alert program output process sequence. It is a basic diagram which shows the mode of a display of a question window.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Digital television receiver, 2 ... Control part, 3 ... Operation part, 4 ... Power supply control part, 5 ... Output processing part, 7A ... Tuner, 7B ... Notification signal detection circuit.

Claims (6)

Receiving means for receiving a broadcast wave including an emergency alert program transmitted from a broadcast station and a notification signal indicating that the emergency alert program is being transmitted;
Notification signal detecting means for detecting the notification signal from the broadcast wave;
Information output means for extracting and outputting the emergency alert program from the broadcast wave in response to detecting the notification signal by the notification signal detection means;
A control means for measuring an elapsed time from the start of the output of the emergency warning program and forcibly stopping the power supply to the information output means when a predetermined time has elapsed. Alarm broadcast receiver. The control means forcibly stops the power supply to the information output means at the earlier point of time when the notification signal is no longer detected or when the predetermined time has elapsed. The emergency alert broadcast receiver described. The information output means displays a question window screen asking whether to continue outputting the emergency alert program to the user when outputting the emergency alert program,
When the control means receives an instruction to continue outputting the emergency alert program via the question window screen, the control means supplies power to the information output means even after the predetermined time has elapsed. The emergency alert broadcast receiver according to claim 1, wherein the emergency alert program is continuously output by continuing. The information output means includes
The emergency warning broadcast receiving apparatus according to claim 3, wherein the question window screen is displayed and a sound indicating that the emergency warning program is being output is output. A notification signal detecting step of detecting the notification signal from a broadcast wave including an emergency warning program transmitted from a broadcasting station and a notification signal indicating that the emergency warning program is being transmitted;
When the output of the emergency alert program is started by the information output means for extracting and outputting the emergency alert program from the broadcast wave, the information output means measures the elapsed time from the start and when a predetermined time has passed. An emergency warning broadcast receiving method comprising: a control step for forcibly stopping the power supply to the device. To the television receiver
A notification signal detecting step of detecting the notification signal from a broadcast wave including an emergency warning program transmitted from a broadcasting station and a notification signal indicating that the emergency warning program is being transmitted;
When the output of the emergency alert program is started by the information output means for extracting and outputting the emergency alert program from the broadcast wave, the information output means measures the elapsed time from the start and when a predetermined time has passed. An emergency warning broadcast receiving program for executing a control step for forcibly stopping power supply to the.

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