JP5790184B2 - Receiving device and program - Google Patents

Description

  The present invention relates to a receiving device and a program, and more particularly to a receiving device and a program suitable for receiving emergency information in digital broadcasting.

  A technique for transmitting an emergency bulletin by digital broadcasting such as terrestrial digital broadcasting is known (for example, Patent Document 1). The emergency information transmitted as such an emergency bulletin includes earthquake motion warning information for notifying the danger of an earthquake occurrence, and is expected to be effective in reducing damage caused by the earthquake.

  On the other hand, receivers that receive digital broadcasts are becoming smaller and lighter, and are widely put into practical use as portable devices. For this reason, emergency information (alarm information) such as earthquake motion alarm information can be received regardless of the location of the user.

  However, since it is not known when such emergency information is issued, the receiving device must always be in a state where it can be received in order to receive it reliably. That is, even when a normal broadcast program is not received (viewed), there is an inconvenience that power is consumed, the remaining battery level is reduced, and the operable time is shortened.

  For this reason, establishment of the technique which can receive emergency information reliably with less power consumption is calculated | required. Here, intermittent reception is conceivable as a method for reducing power consumption in the receiving apparatus. In the case of intermittent reception, power consumption can be reduced by stopping energization of the configuration related to reception during a period when the reception operation is not performed.

  However, in the case of digital broadcasting, since it takes a certain time to demodulate and decode the received signal, when emergency information is received by intermittent reception, the content of the received information is notified to the user for the required time. It may take some time before. In particular, in the case of earthquake motion warnings, currently it is issued immediately before the occurrence of the earthquake, so if there is a time lag in reception, the alarm may not be notified before the occurrence of the earthquake, which is originally expected The effect may not be obtained.

  On the other hand, earthquake motion warning information is transmitted by being added to a broadcast signal by an AC (Auxiliary Channel) signal in digital broadcasting, that is, an additional information signal. The configuration of AC signals related to earthquake motion warning information has been standardized as “ARIB STD-B31” established by the Association of Radio Industries and Businesses (ARIB). Because the standardized seismic motion warning information of the signal configuration is used, the receiving device has the configuration of the received seismic motion warning information regardless of the manufacturer of the receiving device or the broadcaster. It can be easily grasped.

  For this reason, more effective power saving can be expected by adding a power saving operation according to the signal configuration of the received earthquake motion warning information to hardware control such as an intermittent reception operation.

JP 2010-136352 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a receiving apparatus and a program that can save power required for receiving contents added to digital broadcasting such as emergency information. And

In order to achieve the above object, a receiving apparatus according to the present invention provides:
In a receiving device for receiving digital broadcasting,
Power saving control means for intermittent reception that alternately repeats reception stop and reception execution;
Additional signal determination means for determining whether or not emergency information is included in the received additional signal and further determining the content of the signal indicating the type of emergency information when the emergency information is included in the received additional signal When,
Preference setting means for setting preference information indicating whether or not a user of the receiving device desires to receive detailed information about an emergency situation of the emergency information ,
The power saving control means includes:
If the type of emergency information determined by the additional signal determination means is general information about an emergency situation, continue execution of reception,
When the type of emergency information determined by the additional signal determination unit is detailed information about an emergency situation, the operation of the intermittent reception is controlled based on the preference information set by the preference setting unit. ,
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the power saving concerning reception of the content added to digital broadcasting, such as emergency information, can be achieved.

It is a block diagram which shows the structure of the receiver concerning Embodiment 1-3 of this invention. It is a functional block diagram which shows the function implement | achieved by the demodulation part shown in FIG. It is a figure which shows typically the signal structure of the AC signal received by the receiver concerning embodiment of this invention, (a) shows the signal structure of the whole AC signal typically, (b) shows ( The contents of “configuration identification” shown in a) are shown. It is a figure which shows typically the signal structure of "earthquake motion warning information" shown to Fig.3 (a). It is a figure for demonstrating the detail of the "earthquake motion warning information" shown in FIG. 4, (a) shows the content of the "start / end flag", (b) shows the content of "signal identification". . It is a figure for demonstrating the detail of "earthquake motion warning detailed information" shown in FIG. 4, (a) shows typically the signal structure of "earthquake motion warning detailed information", (b) is (a). The types of “earthquake motion information” shown in FIG. 6 are schematically shown, and (c) and (d) show the contents for each type shown in (b). It is a figure for demonstrating the "preference" concerning embodiment of this invention, (a) is a flowchart which shows a "preference setting process", (b) is displayed by a "preference setting process" The example of a display of the setting screen output is shown, (c)-(f) shows the example of the setting of the flag which shows the preference content. It is a flowchart for demonstrating "alarm information reception processing (1)" concerning Embodiment 1 of the present invention. It is a flowchart for demonstrating "alarm information reception processing (2)" concerning Embodiment 2 of this invention. It is a block diagram which shows the structure of the receiver concerning Embodiment 4 of this invention.

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

(Embodiment 1)
A receiving apparatus 1 according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram illustrating a configuration of a receiving device 1 according to the first embodiment. Here, a case where the receiving apparatus according to the present invention is configured as a receiving apparatus for use in receiving digital broadcasting such as terrestrial digital broadcasting will be described as an example. In this case, in the present embodiment, it is assumed that the receiving device 1 is configured as a portable receiving device that is driven by battery power.

  As shown in the figure, the receiving device 1 according to the present embodiment includes an RF circuit unit 10 that receives a broadcast wave that is a harmonic (RF), and a demodulated received signal to generate a reproduction signal of broadcast content. And a demodulating circuit unit 20 to be obtained.

  As shown in FIG. 1, the RF circuit unit 10 includes an RF amplifier 11, a frequency conversion unit 12, an oscillation operation unit 13, an analog filter 14, an IF amplifier 15, and the like.

  The RF amplifier 11 is an amplifier (first amplifier) that amplifies a reception signal of a broadcast radio wave received by an antenna (not shown) at a broadcast frequency (RF: Radio Frequency). In the present embodiment, a gain ( The gain is a variable gain amplifier (VGA) that can be controlled.

  The frequency conversion unit 12 is composed of, for example, a mixer circuit such as an analog multiplier, and mixes the frequency of the signal amplified by the RF amplifier 11 with the local frequency from the oscillation operation unit 13, so that the RF amplifier 11 The output frequency is converted from the RF band to the subsequent frequency band. In the present embodiment, frequency conversion from an RF band to an IF (Intermediate Frequency) band is performed.

  The oscillation operation unit 13 has a configuration for generating a local frequency mixed with the frequency of the amplified received signal for frequency conversion in the frequency conversion unit 12. For example, a phase-locked loop (PLL) is used. A phase synchronization circuit, a VCO (Voltage Controlled Oscillator) circuit, a clock oscillation circuit, an XO circuit, and the like are generated, and a local frequency corresponding to the selected frequency is generated.

  The analog filter 14 is an analog filter such as a low-pass filter (LPF), for example, and attenuates unnecessary waves by filtering the IF output signal of the frequency converter 12.

  The IF amplifier 15 is an amplifier (second amplifier) configured by, for example, the same VGA (variable gain amplifier) as the RF amplifier 11, and outputs the signal filtered by the analog filter 14 to the demodulation unit 200. Amplify by frequency. In the present embodiment, since the frequency conversion unit 12 converts the frequency to the IF frequency band, amplification is performed at the frequency of the IF band.

  As shown in FIG. 1, the demodulation circuit unit 20 includes an ADC 21, a digital filter 22, a storage unit 23, an AGC unit 24, a power supply control unit 25, a demodulation unit 200, and the like.

  The ADC 21 is an analog-digital converter (ADC), converts an analog signal in the IF band amplified by the IF amplifier 15 into a digital signal, and uses the digital signal for demodulation.

  The digital filter 22 is a digital filter that filters (filters) the digital signal converted by the ADC 21 to a desired frequency band, and includes, for example, a DLPF (Digital Low-Pass Filter).

  The storage unit 23 includes, for example, a register, a ROM (Read Only Memory), or other rewritable storage device, and stores an operation program executed by the demodulation unit 200, data used by the demodulation unit 200, and the like. To do.

  The AGC unit 24 controls each unit of the RF circuit unit 10 based on a control signal from the demodulation unit 200 in order to perform an operation related to AGC (automatic gain control) of the receiving device 1. The AGC unit 24 includes, for example, a digital-analog converter (DAC), and the analog RF circuit unit 10 that is the previous stage of the demodulation circuit unit 20 is replaced with a digital demodulation unit 200 (details). When the control is performed by a later-described unit, the control signal (digital signal) generated by the demodulator 200 is converted into an analog signal for a configuration that requires an analog signal. In the generation of such an analog control signal, for example, modulation such as PWM (Pulse Width Modulation) and PCM (Pulse Code Modulation) is performed as necessary.

  The power supply control unit 25 controls the power used in the RF circuit unit 10 based on an instruction from the demodulation unit 200 in order to save power in the receiving device 1. In this embodiment, seismic motion warning information (emergency information) is intermittently received, and the RF circuit unit 10 is set in a standby (standby) state as necessary in order to reduce power consumption more effectively at the time of intermittent reception. (Hereinafter referred to as “RF standby”). In the RF standby in the present embodiment, for example, the power supply control unit 25 performs power control so that only the oscillation operation unit 13 in the configuration of the RF circuit unit 10 is energized and the other configurations are not energized.

  The demodulator 200 includes, for example, a digital processor (digital arithmetic circuit) such as a DSP (Digital Signal Processor) or a CPU (Central Processing Unit), and performs processing using a digital signal converted by the ADC 21. To do.

  In the present embodiment, as shown in FIG. 1, it is assumed that the output from the ADC 21 and the output from the digital filter 22 are input to the demodulation unit 200. The demodulator 200 implements various functions by executing an operation program recorded in the storage unit 23.

  In the present embodiment, the power saving control of the RF circuit unit 10 and the gain control of the RF amplifier 11 and the IF amplifier 15 are performed by the demodulation unit 200. Among the functions realized by the demodulator 200, functions necessary for power saving control and gain control will be described below with reference to FIG. FIG. 2 is a functional block diagram showing functions realized by the demodulator 200.

  As shown in the figure, the demodulation unit 200 implements a demodulation function 210, a gain control function 220, a power saving control function 230, and the like. In the present embodiment, these functions are integratedly realized in a processor such as a DSP or a CPU. However, these functions are performed by dedicated hardware specialized for operations related to the above functions. May be realized.

  The demodulation function 210 demodulates the digital signal filtered to the desired frequency band by the digital filter 22 and outputs a reproduction signal indicating audio or video to the input / output device 40 related to the reproduction operation.

  Here, the input / output device 40 includes an output device such as a display device that displays and outputs an image of a television broadcast received by the receiving device 1, a sounding device that outputs sound related to the received broadcast, and the receiving device 1. An input device for performing various inputs related to operation is included. All of these input / output devices are appropriately configured by general devices using known techniques.

  The gain control function 220 measures the received power applied to the received signal and performs gain control based on the measured received power. In the present embodiment, the RF amplifier 11 and the IF amplifier 15 are controlled by the gain control function 220 so that the RF gain and the IF gain are appropriately distributed.

  The operation related to gain control is assumed to be performed by a normal AGC operation using a known technique. In this case, the gain control function 220 generates a control signal (AGC_RF) for controlling the RF amplifier 11 and a control signal (AGC_IF) for controlling the IF amplifier 15, and sends them to the RF amplifier 11 and the IF amplifier 15 via the AGC unit 24. Gain control is performed by sending.

  In the present embodiment, when performing such gain control, the gain control function 220 accesses the storage unit 23 and refers to the data (AGC value) recorded in the storage unit 23 so that the RF gain and IF It is assumed that gain distribution of gain is determined.

  The power saving control function 230 reduces the power consumption of the receiving device 1 by generating a control signal to the power supply control unit 25. In the present embodiment, the control signal CTRL_STB for instructing the RF standby to the power supply control unit 25 is generated and transmitted, so that the RF circuit unit 10 is brought into a standby state (reception stop) and the RF standby is canceled. By generating the signal CTRL_STB and sending it to the power supply control unit 25, the RF standby is canceled (reception execution), and intermittent reception is performed.

  In addition, when an AC signal including earthquake motion warning information is received in this intermittent reception, the power saving control function 230 determines the content in the order of the signal configuration of the AC signal and controls the operation of intermittent reception according to the determined content. .

  The above is the configuration of the receiving device 1 according to the present embodiment, but each of the above configurations shows the configuration necessary for realizing the present invention, and other configurations necessary for the receiving device are described. It is assumed that it is appropriately provided as necessary.

  The operation of the receiving apparatus 1 having the above configuration will be described below. The present invention is intended to realize more effective power saving when receiving emergency information by applying the present invention. Therefore, in this embodiment, it demonstrates centering on the operation | movement at the time of receiving earthquake motion warning information as emergency information with the receiver 1. FIG.

  In the receiving apparatus 1 according to the present embodiment, an operation for notifying the danger of an earthquake in advance by receiving earthquake motion warning information added as an AC (Auxiliary Channel) signal to a broadcast wave of digital terrestrial television broadcasting. To do. Therefore, it is necessary to reliably receive the issued earthquake motion warning information, but for this purpose, it must be in a state where it can always be received. However, when the receiving device 1 is configured as a portable device, it is driven by a battery. Therefore, if the receiving device 1 is always ready for reception, power consumption increases, leading to battery consumption in a shorter time.

  For this reason, in the present embodiment, the power consumption is reduced by intermittent reception operation in order to receive the AC signal while the normal broadcast is not received. Furthermore, it is intended to reduce power consumption more effectively by performing power saving control based on the signal configuration of the earthquake motion warning information and the user's desire.

  In this case, in this embodiment, the signal configuration of the AC signal is used for the power saving operation. Here, the AC signal for transmitting earthquake motion warning information is standardized as “ARIB STD-B31” formulated by the Association of Radio Industries and Businesses (ARIB). Yes. Therefore, before describing the operation of the receiving device 1, the signal configuration of the AC signal for transmitting the earthquake motion warning information will be described with reference to the drawings.

FIG. 3A is a diagram schematically showing the signal configuration of the entire AC signal. “B _x ” (x is an integer) in the figure indicates a bit number assigned to an item configured as an AC signal. For example, when the bit assignment for the item “A” is “B ₀ to B ₁ ”, the content of the item A is represented by two bits of bit numbers B ₀ and B ₁ .

  As shown in FIG. 3 (a), in the entire AC signal, the first 1 bit is “differential demodulation reference”, the next 3 bits are “configuration identification”, and the next 200 bits are “earthquake motion warning information (etc.)”. Is configured as shown. Hereinafter, in the description of the signal configuration, only signals that are used (referenced) when the receiving device 1 receives earthquake motion warning information will be described. In the drawings, the names of the signal structures to be explained are underlined.

In the signal configuration of the entire AC signal shown in FIG. 3A, “configuration identification” and “earthquake motion warning information” correspond. Three bits B _{1 to} B ₃ are assigned to “configuration identification”, and the contents shown in FIG. 3B are represented by these three bits. That is, the configuration identification indicates whether the information transmitted by the subsequent bit string is “additional information regarding transmission control of modulated waves” or “earthquake motion warning information”. In the present embodiment, it is assumed that the seismic motion warning information is received, and therefore the content indicated by “configuration identification” is “transmit seismic motion warning information” (that is, “B ₁ , B ₂ , B ₃ "Is" 0 ・ 0 ・ 1 "or" 1 ・ 1 ・ 0 ") only.

In this case, “earthquake motion warning information” is composed of 200 bits B _{4 to} B ₂₀₃ following “configuration identification”. The signal configuration of “earthquake motion warning information” will be described with reference to FIG. As shown in the figure, the “earthquake motion warning information” includes “synchronization signal”, “start / end flag”, “update flag”, “signal identification”, “earthquake motion warning detailed information”, “CRC”, and “parity bit”. It is configured. Among these, the “start / end flag”, “signal identification”, and “earthquake motion warning detailed information” related to the operation of the receiving device 1 will be described below.

  First, the “start / end flag” will be described with reference to FIG. As shown in the figure, the “start / end flag” indicates the presence / absence of “seismic motion warning detailed information” (details will be described later) in the seismic motion warning information in 2 bits.

  Next, “signal identification” will be described with reference to FIG. As shown in the figure, “signal identification” indicates the presence / absence of detailed earthquake motion information for the corresponding area in 3 bits. Here, since this AC signal is added to the broadcast wave of the television broadcast, whether or not there is the detailed information on the earthquake motion warning about the area in the broadcast area of the broadcasting station transmitting the broadcast wave is indicated by “Signal”. It is indicated by “identification”.

  Next, the “earthquake motion warning detailed information” will be described with reference to FIG. As shown in FIG. 6A, the “earthquake motion warning detailed information” is composed of “current time”, “page type”, and “earthquake motion information”. Among these, the “page type” and “earthquake motion information” related to the operation of the receiving device 1 will be described with reference to FIGS. 6 (b) to 6 (d).

Since “1 type” of B ₅₅ is assigned to “page type” (see FIG. 6A), the binary “0” or “1” indicates the type of “earthquake motion information” that follows. . That is, there are two types of “earthquake motion information”, and if the page type is “0”, as shown in FIG. 6B, “earthquake motion information” indicating the target area of the earthquake motion warning is continued. If the page type is “1”, as shown in FIG. 6B, it indicates that “earthquake motion information” indicating the seismic intensity, the position of the epicenter, and the like continues.

Here, an alarm that notifies the occurrence of the earthquake in advance (hereinafter referred to as "pre-alert") in the case of the page type is "0", as shown in FIG. 6 (c), the B ₅₆ .about.B ₁₁₁ Information to which a region is assigned follows as “earthquake motion information” (hereinafter referred to as “preliminary warning information”). This pre-alarm information indicates that the area corresponding to the bit number whose bit is “1” is the target area of the earthquake motion alarm (pre-alarm).

  On the other hand, the earthquake motion information corresponding to the page type “1” is information indicating the epicenter of the earthquake, the seismic intensity, and the like as shown in FIG. In the current seismic observation technology, the epicenter and the seismic intensity can be specified only after the earthquake occurs. That is, the earthquake motion information with the page type “1” is not a prior warning but information for notifying the details of the earthquake that occurred (hereinafter referred to as “subsequent detailed information”).

  In order to reliably receive the earthquake motion warning information based on the AC signal having the above signal configuration with low power consumption, the receiving device 1 according to the present embodiment does not receive a normal broadcast program, Performs intermittent reception of AC signals. The operation for this will be described below.

  Here, as described above, there are two types of earthquake motion warning information transmitted by an AC signal: pre-alarm information and post-detail information. Of these, prior warnings are useful information from the viewpoint of disaster prevention in order to minimize damage caused by earthquakes, so that seismic motion warning information including them is always received when it is transmitted.

  Here, the pre-alarm can be regarded as summary information as emergency information that needs to be reported only as an overview, and “post-detail information” provides further details about the emergency that occurred. Because it is information to do, it can be considered as detailed information.

  On the other hand, the post-detail information (detail information) is information that is clarified after the occurrence of the earthquake, and thus is not necessarily highly necessary information from the viewpoint of disaster prevention. Therefore, depending on the user of the receiving device 1, there are some who think that post-detail information is unnecessary. Therefore, it is assumed that whether or not to receive the detailed information after the fact can be set according to the preference for each user (preference setting).

  For this purpose, the “preference setting process” executed in the receiving apparatus 1 will be described with reference to the flowchart shown in FIG. This “preference setting process” is executed, for example, when the receiving apparatus 1 is used for the first time, and can be arbitrarily executed by a user operation.

  When the processing is started, for example, a setting screen as shown in FIG. 7B is displayed on the display device constituting the input / output device 40 by the demodulation function 210 of the demodulator 200 (step S11). . On this setting screen, it is displayed so that it is possible to select whether to receive only a pre-alarm or to receive post-detail information in addition to the pre-alarm. The user of the receiving device 1 operates an input device (such as a keypad) constituting the input / output device 40 and selects a desired option.

  The demodulation function 210 sets a flag according to the selection content input in this way (step S12). Here, whether the received earthquake motion warning information is pre-alarm information or post-detail information, as described above, whether the bit of “page type” in the AC signal is “0” or “1”. Identified by Therefore, the flag in this case (hereinafter referred to as “preference flag”) can be set as a 2-bit flag corresponding to each of the two values indicated by 1-bit “page type”. That is, when the user's selection is “Receive only pre-alarm”, the flag corresponding to the page type “0” (pre-alarm information) is set to “1” as shown in FIG. The flag corresponding to “1” (post-mortem detailed information) is set to “0”.

  Here, as described above, the reception of the prior warning information is indispensable for the purpose of the earthquake motion warning information. Therefore, when the user's selection is “receive post-mortem detailed information”, as shown in FIG. In addition, the flag corresponding to the page type “0” (preliminary alarm information) is also set to “1”, and the flag corresponding to the page type “1” (ex-post detailed information) is set to “1”.

  In the precondition in the present embodiment, when the type of user preference is related to the page type, only the preference flag corresponding to the page type “1” is different, so the data used for the preference flag is For simplification, a 1-bit preference flag may be used as shown in FIGS. 7 (e) and 7 (f).

  The demodulation function 210 stores the preference flag set in this way in the storage unit 23 (step S13), and ends the process.

  The “alarm information reception process (1)” for receiving the earthquake motion warning information by the receiving device 1 will be described with reference to the flowchart shown in FIG. This “alarm information receiving process (1)” is assumed to be started, for example, when the receiving apparatus 1 is turned on or when normal broadcast reception is terminated by a user operation.

  When processing is started, first, normal reception operation is performed to establish synchronization with a TMCC (Transmission Multiplexing Configuration Control) carrier or an AC carrier, and an OFDM (Orthogonal Frequency Division Multiplexing) signal is transmitted. Decode. Then, the gain control function 220 records the AGC value at that time in the storage unit 23 (step S101). The AGC value in this case is, for example, gain distribution between the RF amplifier 11 and the IF amplifier 15 that optimizes the gain of the received signal input to the demodulation circuit unit 20.

  When this processing is started when the normal program receiving operation is terminated, the AGC value in the AGC operation at the time of the previous (previous) program reception may be recorded.

  When the AGC value related to the reception operation just before such is recorded, the power saving control function 230 performs power saving control related to intermittent reception. Here, by restricting energization to the circuits or the like constituting the RF circuit unit 10, the standby state (RF standby) is set, and the reception operation is stopped (step S102). That is, when the receiving apparatus 1 does not perform a normal broadcast program receiving operation, it shifts to a “power saving mode” in which power consumption is reduced by intermittent reception, and reception is stopped by RF standby.

  Here, the power saving control function 230 generates a control signal CTRL_STD for setting the RF standby and sends it to the power supply control unit 25. The power supply control unit 25 converts the CTRL_STD from the power saving control function 230 into an analog signal and controls the operation of each unit of the RF circuit unit 10. In the RF standby in the present embodiment, only the oscillation operation unit 13 is energized, and energization to the RF amplifier 11, the frequency conversion unit 12, the analog filter 14, and the IF amplifier 15 is stopped.

  In such an RF standby state, the entire RF circuit unit 10 does not operate, and therefore no reception operation is performed. In addition, by stopping energization to an amplifier or filter that consumes a relatively large amount of power, it is possible to effectively reduce power consumption during reception standby.

  Further, in the RF standby state, by not stopping the energization of the oscillation operation unit 13 in the RF circuit unit 10, it is possible to quickly return from the reception stop state to the reception execution state.

  When the reception operation timing of intermittent reception is reached (step S103: Yes), the power saving control function 230 cancels the RF standby by sending a control signal CTRL_STB for canceling the RF standby state to the power supply control unit 25 (step S104). ). In this case, all the circuits of the RF circuit unit 10 are energized by the control of the power supply control unit 25 based on CTRL_STB, and the reception operation can be executed.

  The RF standby release timing is determined based on the time interval (cycle) at which the earthquake motion warning information is repeated. That is, based on the format (signal configuration) of emergency information, for example, within a period of a signal configuration cycle (a cycle of 204 bits in the above example) such as several ms to several hundred ms, the reception stop state and reception start Intermittent reception in which the state is repeated is performed.

  Here, when reception is executed by releasing the RF standby (reception execution), the gain control function 220 performs gain synchronization using the AGC value recorded in the storage unit 23 in step S101 (step S105). As a result, gain control is performed with the AGC value immediately before the RF standby, so that a gain more suitable than the start of reception after the release of the RF standby can be obtained as long as there is no significant change in the reception environment.

  If the gain control using the recorded AGC value cannot be obtained due to a change in the reception environment before the RF standby, etc., the AGC operation is performed again, and the AGC value is stored in step S105. 23.

  After such gain synchronization, reception of the AC signal is started (step S106), and the demodulation function 210 sequentially performs a determination operation based on the signal configuration of the received AC signal.

First, it is determined from the bit arrangement of “configuration identification” (see FIG. 3B) assigned to B _{1 to} B ₃ of the AC signal whether or not earthquake motion warning information is transmitted by the AC signal ( Step S107).

  Here, if the received AC signal does not transmit earthquake motion warning information (step S107: No), the demodulation function 210 notifies the power saving control function 230 to that effect. In this case, in response to the notification from the demodulation function 210, the power saving control function 230 sets the RF circuit unit 10 to the standby state by sending the control signal CTRL_STB that sets the RF circuit unit 10 to the standby state to the power supply control unit 25 (step S102). ).

  That is, when it is determined that the AC signal received by intermittent reception does not transmit earthquake motion warning information, the RF standby mode is set. It is assumed that the same operation is performed when the RF standby is performed in the determination operation described below.

  On the other hand, when the received AC signal is to transmit earthquake motion warning information (step S107: Yes), the demodulation function 210 further receives the received AC signal based on the “start / end flag” (FIG. 5A). It is determined whether or not the signal includes earthquake motion warning detailed information (emergency information) (step S108).

  Here, when it does not include detailed earthquake motion warning information (step S108: No), it is set to RF standby (step S102).

  On the other hand, if the detailed earthquake motion warning information is included (step S108: Yes), the demodulation function 210 further includes the earthquake motion warning detailed information in the corresponding area based on the “signal identification” (FIG. 5B) (broadcast area). It is determined whether or not the target area is present (step S109).

  Here, if the seismic motion warning detailed information transmitted is not for the broadcast area of the currently received broadcast, that is, if there is no corresponding area (step S109: No), the RF standby is set (step S102). .

  On the other hand, when the seismic motion warning detailed information transmitted is for the corresponding area (step S109: Yes), the demodulation function 210 further includes a bit of “page type” (see FIG. 6A and FIG. 6B). Is “0”, that is, it is determined whether or not it is prior warning information (step S110).

  As described above, since it is assumed that the prior warning information is received unconditionally, when the page identification is “0” (step S110: Yes), the demodulating function 210 continues the seismic motion information, that is, the prior warning information. (See FIG. 6C) is received (step S111), and an earthquake motion warning based on the received information is output from the input / output device 40. In this case, the fact that there is a possibility of an earthquake and the target area indicated by the prior warning information are notified by, for example, screen display or voice.

  On the other hand, if the page identification is “1”, that is, indicates that the information is post-mortem detailed information (step S110: No), the demodulation function 210 accesses the storage unit 23 and refers to the preference flag (step S112). ). Here, it is assumed that the preference flag is as shown in FIG. 7E or FIG. In this case, if the user desires to receive post-mortem detailed information, the flag is ON, that is, “1”.

  Therefore, if the flag is ON (step S113: Yes), the demodulation function 210 receives the following seismic motion information, that is, the posterior detailed information (see FIG. 6D) (step S111), and the seismic motion information based on the received information. Is output from the input / output device 40. In this case, information indicating the seismic intensity and the epicenter of the earthquake that has occurred is notified by, for example, screen display or voice.

  On the other hand, if the preference flag is OFF, that is, “0”, the user does not want to receive the post-detail information. In this case (step S113: No), the earthquake motion information is not read, The RF standby is set (step S102).

  If a predetermined end event (for example, reception start of a normal broadcast program by a user operation) does not occur after receiving the earthquake motion information according to the preference (step S114: No), the RF standby is set (step S102). The intermittent reception operation described above is continued, and when an end event occurs (step S114: Yes), this process is terminated.

  As described above, according to the present embodiment, the power saving control is performed based on the standardized signal structure of the earthquake motion warning information. In this case, the AC signal is determined in the order of signal arrangement, and when it is determined that the current position does not correspond to the standby state, the standby state in intermittent reception can be increased as much as possible. Power consumption can be reduced.

  In addition, since power saving control is performed according to the user's request for receiving post-detail information, it is possible to reliably receive important pre-alarm information from the viewpoint of disaster prevention, and when receiving post-detail information is not desired Since the standby state is set, the power consumption can be more effectively reduced.

  In the above flow, an example in which intermittent reception in which the reception stop state and the reception start state are repeated based on the format (signal configuration) of emergency information is repeated is described. There are also a signal composition cycle and a long cycle in which the emergency information itself is / is not added.

  Due to the nature of emergency information, important information such as advance warning information should not be missed while reception is stopped. For example, in the case of earthquake motion warning information, it is desirable to avoid a delay in acquisition of time such as 1 second. Is short (several transmission speed) such as several ms, intermittent reception that stops receiving is performed for several to several tens of times the signal composition period, and emergency information is received after the reception state is reached after that. If possible, human error is within the error range.

  Failure to receive transmitted emergency information by performing intermittent reception in such a period that it is in a reception state at least once during a period in which emergency information is transmitted continuously at a minimum when emergency information is transmitted Therefore, it is possible to save power more efficiently. Then, after the emergency information can be received, the intermittent reception cycle may be switched to the signal configuration cycle.

(Embodiment 2)
In the first embodiment, an example has been described in which the “post-detail information” that can be identified by the “page type” operates based on the user's desire.

  Here, when the user does not want to receive the detailed information after the fact, for example, there is a possibility that the user will want to know the details of the earthquake for the earthquake that occurred after the reception of the advance warning.

  An operation example that can cope with such a case will be described in the present embodiment. Here, it demonstrates with reference to "alarm information reception process (2)" shown in FIG. This “alarm information reception process (2)” is a modification of part of the “alarm information reception process (1)” shown in FIG. 8, and the start of the process is “alarm information reception process (1)”. In addition, each process up to the determination of the page type is the same as “alarm information reception process (1)”. Therefore, the operation after the determination of the page type (from step S204) will be described below.

  In step S204, the demodulation function 210 determines whether the “page type” is “0” or “1”. Then, when the “page type” is “0”, that is, prior warning information (step S204: Yes), as in the case of the first embodiment, the earthquake motion information (see FIG. 6C) that is the prior warning information. In this embodiment, a 1-bit flag (hereinafter referred to as “alarm notification flag”) indicating whether or not a prior warning has been issued is prepared on the storage unit 23 so as to be settable. Assuming that the demodulating function 210 turns this alarm notification flag ON, that is, “1” (step S205), receives earthquake motion information as prior alarm information (step S206), and outputs it from the input / output device 40. To inform you.

  In addition, the alarm notification flag is turned on in step S205, and the demodulation function 210 also includes information necessary for determining the relationship between the pre-alarm information received this time and the posterior detailed information that may be received in the future (hereinafter referred to as the following information). , “Determination information”) is recorded in the storage unit 23. The discrimination information in this case can be, for example, time information indicated by “current time” (see FIG. 6A) constituting the earthquake motion warning information. In this case, information indicating the time at which the prior warning information is sent is recorded in the storage unit 23 as discrimination information.

  On the other hand, when the “page type” is “1”, that is, the posterior detailed information (step S204: No), the demodulation function 210 accesses the storage unit 23 and the preference flag (FIG. 7 (e), (f) )) To determine the preference flag setting (step S207).

  Here, when the preference flag is ON, that is, “1” (step S207: No), as in the case of the first embodiment, the seismic ground motion information (see FIG. 6D), which is post-mortem information, is used. Receiving (step S206) and reporting by outputting from the input / output device 40.

  On the other hand, when the preference flag is OFF, that is, “0” (step S207: Yes), the demodulation function 210 accesses the storage unit 23 and refers to the alarm notification flag to determine the setting of the alarm notification flag. (Step S208).

  Here, when the alarm notification flag is ON, that is, “1” (step S208: Yes), the post-detail information is received after the advance alarm is notified. In this case, the demodulation function 210 determines, based on the determination information recorded together with the alarm notification flag, whether the post-detail information is related to the notified prior alarm indicated by the alarm notification flag. (Step S209).

  Here, when the discrimination information is time information about the prior warning information, for example, based on the time information about the subsequent detailed information received this time, the elapsed time from the notification of the prior warning to the reception of the subsequent detailed information is calculated. Thus, it is determined whether or not it is post-detail information related to the pre-alarm. The seismic intensity and epicenter shown in the ex-post detailed information will be determined after the occurrence of the earthquake, but the approximate time required for all of these details to be determined can be set from the past earthquake observations. . Therefore, it is possible to determine that the posterior detailed information received within the set time is the posterior detailed information related to the notified prior alarm indicated by the alarm notification flag.

  The reason for determining the relevance between the advance warning and the subsequent detailed information in this way is that both the advance warning information and the subsequent detailed information are not necessarily transmitted. For pre-alarms, for example, alarms may have been sent due to erroneous detection during observation, but an earthquake may not actually occur. In this case, post-detail information related to the pre-alarm will not be sent. Become.

  On the other hand, even a user who does not want to receive post-detail information may want to know the details if, for example, the earthquake that occurred after the pre-alarm is relatively large. Therefore, in this embodiment, when it is determined that the posterior detailed information received after the prior alarm is related to the prior alarm (step S209: Yes), that is, when the posterior detailed information about the earthquake that has been alarmed in advance is received. If the user's preference does not desire to receive the posterior detailed information (step S207: Yes, step S208: Yes, step S209: Yes), the demodulation function 210 performs the “property” shown in FIG. The “reference setting process” is executed (step S210) (change setting process).

  Thereby, the user can perform the setting regarding reception of the posterior detailed information at this time. Here, the preference flag is not changed unless it is desired to receive the post-mortem information as originally set. On the other hand, when the user desires to receive the posterior detailed information due to the occurrence of the earthquake, the setting is changed by the user operation. In this case, the preference flag is turned ON, that is, “1”.

  The demodulation function 210 refers to the setting content with reference to the preference flag in the storage unit 23 after the “preference setting process” in step S210 (step S211). Here, if the preference flag remains OFF, that is, “0” (step S211: No), it is not necessary to receive the detailed information after the fact, so that the RF processing is performed by the same processing as that described in the first embodiment. The standby mode is set (step S202).

  On the other hand, if the preference flag is changed to ON, that is, “1” (step S211: Yes), the seismic motion information which is the post-detail information is received (step S206) and output from the input / output device 40. Inform.

  Here, the discriminating information (for example, time information) recorded when the alarm notification flag is turned on is, for example, deleted when a certain time or more has elapsed since recording, and the alarm notification is performed at that time. The flag is also turned off.

  When the posterior detailed information is received (step S204: No), if the user does not want to receive the posterior detailed information (step S207: Yes), or the alarm notification flag is OFF (step S208: No). ) Or post-detailed information not related to the prior alarm (step S209: No), the RF standby is set without executing the preference setting process (step S210) (step S202).

  The above process is repeated until a predetermined end event occurs (step S212: No), and the process ends when the end event occurs (step S212: Yes).

  According to this embodiment, while reducing power consumption based on the user's preference for receiving post-detail information, it is possible to easily change the preference when an earthquake occurs, thereby improving convenience. Can be achieved.

(Embodiment 3)
In each of the above-described embodiments, an example in which preference setting is made whether reception of post-detail information is desired is shown, but the operation of whether to receive information is not limited to this.

  For example, it is possible to control whether or not to receive information depending on the target area of the earthquake motion warning. In the above embodiment, when “signal identification” (see FIG. 5B) is referred to and the corresponding earthquake motion detailed information is included in the broadcasting area, the signal is received by reading the subsequent signal. The earthquake motion warning of the area including the current position of the device 1 is received. For example, for a place where there is a home or work place, I want to get information about the earthquake even when I am not in that area There is a case.

  Therefore, the user can cope with such a desire by setting the target area of the earthquake motion warning. In this case, for example, the user selects an area corresponding to the earthquake motion information shown in FIG. 6C, and the corresponding bit number or the like is recorded in the storage unit 23 as condition information desired to be received.

  When an AC signal including a seismic motion warning is received, it is determined whether or not condition information indicating region selection is recorded. If so, the determination based on “signal identification” is not performed. . That is, even in the case of an earthquake motion warning for outside the broadcast area, the subsequent signal is read.

  If the target area indicated by the seismic motion information received when the page identification is “0” (see FIG. 6C) includes the area set as the condition information, an earthquake motion warning is output and included. If not, set to RF standby.

  In this way, it is possible to reliably receive a pre-alarm for a desired area, and it is possible to reduce power consumption by operating the post-detail information according to the user's request.

(Embodiment 4)
As shown in FIG. 10, the receiving apparatus 1 has a configuration (current position determining unit 50) for recognizing and determining the current position of the receiving apparatus 1, such as GPS (Global Positioning System). When mounted, the current position information indicating the current position recognized by the current position determination unit 50 can also be used for power saving control related to intermittent reception.

  That is, since the earthquake motion information (preliminary alarm information) when the “page type” is “0” indicates the area as shown in FIG. 6C, the current area is indicated in the area indicated by the received prior alarm information. If the location is included, an alarm is output, and if it is not included, it is set to RF standby, so whether there is detailed information on earthquake motion warning for the area within the broadcasting area of the broadcasting station transmitting the broadcast wave by signal identification A prior warning can be received by a local determination with higher accuracy than a global determination of whether or not, and power consumption can be further reduced.

  As described above, by applying the present invention as in each of the above embodiments, emergency information such as an earthquake motion warning can be reliably received as emergency information, and more effective power saving can be achieved.

  The said embodiment is an example and the application range of this invention is not restricted to this. That is, various applications are possible, and all embodiments are included in the scope of the present invention.

  For example, in the above-described embodiment, each function related to power saving control and gain control is realized by the demodulator 200. However, the function is realized by a digital circuit (processor) independent of the circuit responsible for the demodulation function. It may be configured.

  In the above embodiment, the demodulator 200 and the power controller 25 are described as separate blocks. However, the power controller 25 is integrated with the demodulator 200, and the control signal CTRL_STB for controlling the RF standby is transmitted to the demodulator. The configuration may be such that the signal is sent directly from the 200 to the RF circuit unit 10.

  Needless to say, the transmission form of the control signal CTRL_STB is not limited to hard pin control, and may be software control such as register setting.

  In the above embodiment, the configuration including the analog filter 14 and the like has been described. However, the present invention can also be applied to a system that processes the frequency converter 12 and the subsequent digital signals.

  Moreover, in the said embodiment, although the object received by intermittent reception was used as emergency information as earthquake motion warning information, it is not restricted to this, It is transmitted by the additional signal by which the signal structure like an AC signal is prescribed | regulated. If so, the present invention can be applied to receiving various alarms and the like.

  Note that the present invention can be realized by a receiving apparatus having the same functions and configurations as those of the receiving apparatus 1 of the above-described embodiment, and by applying a program to a digital circuit of an existing receiving apparatus, the receiving according to the present invention can be performed. It can also function as a device. In this case, by causing a computer (such as a CPU) similar to the demodulation unit 200 exemplified in the above embodiment to execute a program for realizing the same function as the above-described function, the computer functions as the receiving device according to the present invention. be able to.

  The application method of such a program is arbitrary. For example, the program can be applied by being stored in a storage medium such as a CD-ROM or a memory card, or can be applied via a communication medium such as the Internet.

  As mentioned above, although some embodiment of this invention was described, embodiment which can apply this invention is contained in the invention described in the claim, and its equality range. The invention described in the scope of claims at the beginning of the filing of the present application will be appended.

(Appendix 1)
In a receiving device for receiving digital broadcasting,
Power saving control means for intermittent reception that alternately repeats reception stop and reception execution;
An additional signal discriminating means for sequentially discriminating the content of the additional signal added to the broadcast wave of the digital broadcast received at the time of reception in the intermittent reception in the order of the signal configuration of the additional signal;
The power saving control means controls the intermittent reception operation according to the determination result of the additional signal determination means.
A receiving apparatus.

(Appendix 2)
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The power saving control means stops receiving when it is determined that emergency information is not included in the received additional signal,
The receiving device according to Supplementary Note 1, wherein

(Appendix 3)
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The additional signal determining means further determines the content of the signal indicating the type of the emergency information when emergency information is included in the received additional signal,
The receiving device further comprises preference setting means for setting preference information indicating whether or not a user of the receiving device desires to receive detailed information about an emergency situation of the emergency information,
The power saving control means includes:
If the type of emergency information determined by the additional signal determination means is general information about an emergency situation, continue execution of reception,
If the type of emergency information determined by the additional signal determination means is detailed information about an emergency situation, the intermittent reception is controlled based on preference information set by the preference setting means.
The receiving apparatus according to appendix 1 or 2, characterized in that:

(Appendix 4)
When the received emergency information is the detailed information, the detailed information is information related to the received summary information, and the preference information set by the preference setting means is detailed information. A change setting means for enabling the change of the preference information,
The power saving control means controls the intermittent reception based on the preference information set by the change setting means.
The receiving device according to Supplementary Note 3, wherein

(Appendix 5)
The additional signal determining means determines whether the detailed information is information related to the received summary information based on a current time;
The receiving device according to appendix 4, wherein:

(Appendix 6)
Further comprising designated area recording means for recording an area designated by a user of the receiving device;
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The additional signal determining means determines the content of the signal indicating the target area of the emergency information when the emergency information is included in the received additional signal,
The power saving control means includes:
If the target area determined by the additional signal determining means includes the area recorded by the designated area recording means, the reception execution is continued.
If the target area determined by the additional signal determining means does not include the area recorded by the designated area recording means, reception is stopped.
The receiving apparatus according to appendix 1 or 2, characterized in that:

(Appendix 7)
A current position determining means for determining a current position of the receiving device;
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The additional signal determining means determines the content of the signal indicating the target area of the emergency information when the emergency information is included in the received additional signal,
The power saving control means includes:
If the current position determined by the current position determining means is included in the target area determined by the additional signal determining means, the reception execution is continued.
If the current position determined by the current position determining means is not included in the target area determined by the additional signal determining means, reception is stopped.
The receiving apparatus according to appendix 1 or 2, characterized in that:

(Appendix 8)
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The power saving control means controls the intermittent reception based on a signal configuration cycle of the emergency information.
The receiving device according to any one of appendices 1 to 7, characterized in that:

(Appendix 9)
The power saving control means controls the intermittent reception based on a time interval in which the additional signal is added to a broadcast wave of the digital broadcast.
The receiving device according to any one of appendices 1 to 8, characterized in that:

(Appendix 10)
The receiving device is
An RF circuit unit that converts a received digital broadcast wave from a high frequency to an intermediate frequency band and outputs the converted signal as an IF signal;
A demodulation circuit unit including a demodulation circuit for demodulating the output from the RF circuit;
Have
The power saving control means, by partially restricting energization to the RF circuit unit, stops reception and controls the intermittent reception operation.
The receiving device according to any one of appendices 1 to 9, characterized in that:

(Appendix 11)
The RF circuit unit includes an oscillation operation unit that generates a local frequency according to digital broadcast tuning,
The power saving control means maintains energization to the oscillation operation unit when partially energizing the RF circuit unit.
The receiving apparatus according to appendix 10, characterized by:

(Appendix 12)
Gain control means for performing gain control related to a receiving operation in the receiving device;
Gain value recording means for recording the gain value of the gain control related to the latest reception; and
The gain control means performs gain control using the gain value recorded by the gain value recording means at the time of execution of reception related to the intermittent reception.
The receiving device according to any one of appendices 1 to 11, characterized in that:

(Appendix 13)
To a computer that controls a receiving device that receives digital broadcasting,
A function for intermittent reception that alternately repeats reception stop and reception execution;
A function of sequentially determining the content of the additional signal added to the broadcast wave of the digital broadcast received at the time of reception in the intermittent reception in the order of the signal configuration of the additional signal;
A function of controlling the operation of the intermittent reception according to the determination result;
A program characterized by realizing.

DESCRIPTION OF SYMBOLS 1 ... Reception apparatus, 10 ... RF circuit part, 11 ... RF amplifier, 12 ... Frequency conversion part, 13 ... Oscillation operation part, 14 ... Analog filter, 15 ... IF amplifier, 20 ... Demodulation circuit part, 21 ... ADC, 22 ... Digital filter, 23 ... storage unit, 24 ... AGC unit, 25 ... power supply control unit, 200 ... demodulation unit, 210 ... demodulation function, 220 ... gain control function, 230 ... power saving control function, 40 ... input / output device, 50 ... Current position discriminator

Claims (13)

In a receiving device for receiving digital broadcasting,
Power saving control means for intermittent reception that alternately repeats reception stop and reception execution;
Additional signal determination means for determining whether or not emergency information is included in the received additional signal and further determining the content of the signal indicating the type of emergency information when the emergency information is included in the received additional signal When,
Preference setting means for setting preference information indicating whether or not a user of the receiving device desires to receive detailed information about an emergency situation of the emergency information ,
The power saving control means includes:
If the type of emergency information determined by the additional signal determination means is general information about an emergency situation, continue execution of reception,
When the type of emergency information determined by the additional signal determination unit is detailed information about an emergency situation, the operation of the intermittent reception is controlled based on the preference information set by the preference setting unit. ,
A receiving apparatus. The additional signal determining means sequentially determines the content of the additional signal added to the broadcast wave of the digital broadcast received at the time of reception in the intermittent reception in the order of the signal configuration of the additional signal.
The receiving apparatus according to claim 1. The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The power saving control means stops receiving when it is determined that emergency information is not included in the received additional signal,
Receiver according to claim 1 or 2, characterized in that. When the received emergency information is the detailed information, the detailed information is information related to the received summary information, and the preference information set by the preference setting means is detailed information. A change setting means for enabling the change of the preference information,
The power saving control means controls the intermittent reception based on the preference information set by the change setting means.
Receiving apparatus according to any one of claims 1 to 3, characterized in that. The additional signal determining means determines whether the detailed information is information related to the received summary information based on a current time;
The receiving apparatus according to claim 4. Further comprising designated area recording means for recording an area designated by a user of the receiving device;
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The additional signal determining means determines the content of the signal indicating the target area of the emergency information when the emergency information is included in the received additional signal,
The power saving control means includes:
If the target area determined by the additional signal determining means includes the area recorded by the designated area recording means, the reception execution is continued.
If the target area determined by the additional signal determining means does not include the area recorded by the designated area recording means, reception is stopped.
Receiving apparatus according to any one of claims 1 to 3, characterized in that. A current position determining means for determining a current position of the receiving device;
The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The additional signal determining means determines the content of the signal indicating the target area of the emergency information when the emergency information is included in the received additional signal,
The power saving control means includes:
If the current position determined by the current position determining means is included in the target area determined by the additional signal determining means, the reception execution is continued.
If the current position determined by the current position determining means is not included in the target area determined by the additional signal determining means, reception is stopped.
Receiving apparatus according to any one of claims 1 to 3, characterized in that. The additional signal determining means determines whether or not emergency information is included in the received additional signal,
The power saving control means controls the intermittent reception based on a signal configuration cycle of the emergency information.
The receiving apparatus according to claim 1, wherein the receiving apparatus is a receiver. The power saving control means controls the intermittent reception based on a time interval in which the additional signal is added to a broadcast wave of the digital broadcast.
The receiving apparatus according to claim 1, wherein the receiving apparatus is a receiver. The receiving device is
An RF circuit unit that converts a broadcast wave of a received digital broadcast from a high frequency to an intermediate frequency band and outputs it as an IF signal;
A demodulation circuit unit including a demodulation circuit for demodulating the output from the RF circuit;
Have
The power saving control means, by partially restricting energization to the RF circuit unit, stops reception and controls the intermittent reception operation.
The receiving device according to claim 1, wherein the receiving device is a receiving device. The RF circuit unit includes an oscillation operation unit that generates a local frequency according to digital broadcast tuning,
The power saving control means maintains energization to the oscillation operation unit when partially energizing the RF circuit unit.
The receiving apparatus according to claim 10. Gain control means for performing gain control related to a receiving operation in the receiving device;
Gain value recording means for recording the gain value of the gain control related to the latest reception; and
The gain control means performs gain control using the gain value recorded by the gain value recording means at the time of execution of reception related to the intermittent reception.
The receiving apparatus according to claim 1, wherein the receiving apparatus includes: To a computer that controls a receiving device that receives digital broadcasting,
A function for intermittent reception that alternately repeats reception stop and reception execution;
It is determined whether or not emergency information is included in the received additional signal, and when the emergency information is included in the received additional signal, a function of further determining the content of the signal indicating the type of the emergency information ;
A function of setting preference information indicating whether or not a user of the receiving device desires to receive detailed information about an emergency situation of the emergency information;
If the determined type of emergency information is summary information about an emergency situation, reception is continued, and if the determined emergency information type is detailed information about an emergency situation, it is set. A function of controlling the intermittent reception operation based on the preference information ;
A program characterized by realizing.

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