JP2015033118A - Portable terminal device, control method for portable terminal device, and control program for portable terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal device capable of changing a plurality of channel lists based upon an estimated destination when the portable terminal device can acquire the plurality of channel lists.SOLUTION: A control part 415 includes: a position determination part 420 which determines whether a portable terminal device moves from a first partial region to an overlap region; a position estimation part 430 which estimates a position (prediction position) of the portable terminal device which is a predetermined time later based upon movement information when it is determined that the portable terminal device moves to the overlap region; and a switching determination part 440 which maintains a first broadcast channel system when it is determined that the prediction position is included in a first partial region, switches the broadcast channel to a second broadcast channel system when it is determined that the prediction position is included in a second partial region, and makes a choice of whether the first broadcast channel system is maintained or switched to the second broadcast channel system according to the predetermined condition when it is determined that the prediction position is included in the overlap region.

Description

  The present invention relates to control of a mobile terminal device, and more particularly to a mobile terminal device capable of receiving a broadcast wave of digital broadcasting, a control method for the mobile terminal device, and a control program for the mobile terminal device.

  In recent years, portable terminal devices capable of receiving broadcast waves of digital broadcasting have become widespread. In digital broadcasting, receivable television programs differ depending on regions. For this reason, the mobile terminal device receives a channel list that defines the channel structure (hereinafter also referred to as “channel list”) of broadcast waves that can be received in an area including the current location of the mobile terminal device, and the channel list To receive TV programs. As such portable terminal devices become widespread, a method for appropriately receiving a channel list has been developed.

  For example, Japanese Patent Laid-Open No. 2006-50065 (Patent Document 1) states that “in a mobile terrestrial digital broadcast receiver, after making a recording reservation, the recording is performed when moving to an area other than the area reserved for recording. A mobile terrestrial digital broadcast receiver that can avoid recording a program different from a reserved program is disclosed (see [Summary]). The mobile terrestrial digital broadcast receiver starts broadcasting reception for recording at a certain time before the start time of the scheduled recording program, and attention is paid to the area information contained in the received broadcast wave. If the area information is different from the recording reservation information, the channel list is switched.

JP 2006-50065 A

  By the way, depending on the position of the mobile terminal device, a plurality of channel lists may be received. In this case, it becomes a problem which channel list of the plurality of channel lists is used to receive the television program.

  The mobile terrestrial digital broadcast receiver disclosed in Patent Document 1 always switches the channel list when the area information included in the received broadcast wave is different from the area information in the noticeable recording reservation information. Thus, if the mobile terminal device frequently switches the channel list while receiving a television program, there arises a problem that video and audio are interrupted.

  On the other hand, if the mobile terminal device goes out of the range where broadcast waves can be received without switching the channel list, the television program cannot be received. Therefore, it is necessary to estimate the destination and determine whether to maintain the current channel list or switch to a new channel list based on the destination.

  This disclosure has been made to solve the above-described problems, and its purpose is to switch the channel list based on the estimated destination when the mobile terminal device can receive a plurality of channel lists. It is providing the portable terminal device which can be performed.

  According to one embodiment, a mobile terminal device capable of receiving a broadcast wave of a digital broadcast is provided. The mobile terminal device includes detection means for detecting movement information including the position of the mobile terminal device, a first broadcast channel system corresponding to a broadcast station in a first viewing range in which broadcast waves can be received, and a second Storage means for storing a second broadcast channel system corresponding to a broadcasting station in the viewing range, and control means capable of switching to the broadcast channel system corresponding to the viewing range including the position of the mobile terminal device. Prepare. The control means determines the position for determining whether or not the mobile terminal device has moved from the first viewing range excluding the second viewing range to a range in which the first viewing range and the second viewing range overlap. And the mobile phone after elapse of a predetermined time based on the movement information when it is determined that the movement from the first viewing range excluding the second viewing range to the overlapping range is made according to the determination result of the position determination unit. If it is determined that the position estimation unit for estimating the position of the terminal device and the position of the mobile terminal device estimated by the position estimation unit are included in the first viewing range other than the second viewing range, If one broadcast channel system is maintained and it is determined that it is included in the second viewing range excluding the first viewing range, it is switched to the second broadcast channel system, and if it is determined that it is included in the overlapping range First release The switch to the second broadcast channel system or to keep the channel system and a switching determination means for selecting according to predetermined conditions.

  In one aspect, when the mobile terminal device can receive a plurality of channel lists, a mobile terminal device capable of switching the channel list based on the estimated destination can be provided.

  The above and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of the present invention taken in conjunction with the accompanying drawings.

It is a figure which shows the outline | summary of the channel list according to viewing-and-listening range. It is a figure which shows a mode that the smart phone according to 1st Embodiment has passed the some viewing-and-listening range. It is a block diagram which shows the hardware constitutions of the smart phone according to this Embodiment. It is a block diagram which shows the function structure of the smart phone according to 1st Embodiment. It is a figure which shows the data structure of a viewing-and-listening range list. It is a figure which shows the data structure of a channel list. It is a sequence diagram explaining roughly the flow of transmission / reception of the data with the smart phone according to this Embodiment and a broadcasting station. It is a flowchart showing a part of process which the smart phone according to 1st Embodiment performs. It is a figure which shows a mode that the smart phone according to 2nd Embodiment has passed the some viewing-and-listening range.

  Hereinafter, the present embodiment will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  In addition, below, although the detail of the smart phone 100 which functions as an example of a portable terminal device is demonstrated, a portable terminal device is not limited to a smart phone. For example, the mobile terminal device may include a tablet terminal, a digital camera, and other mobile devices that can receive broadcast waves of digital broadcasting.

[First Embodiment]
<Channel list>
FIG. 1 is a diagram showing an overview of a channel list for each viewing range. An overview of the channel list will be described with reference to FIG.

  The TV programs that can be viewed vary depending on the viewing range including the current location of the smartphone 100. Therefore, when the user moves to a certain viewing range, the smartphone 100 receives a channel list that defines broadcast waves that can be viewed in the viewing range.

  Smartphone 100 has a state (A) and a state (B). For example, when the current location of the smartphone 100 is Osaka, the state of the smartphone 100 is the state (A). When the current location of the smartphone 100 is Hiroshima, the state of the smartphone 100 is in the state (B).

  When the user moves to Osaka, the state of the smartphone 100 becomes the state (A). The smartphone 100 receives a channel list 140 that defines broadcast waves that can be viewed in Osaka. The monitor 120 displays an area name display area 130 and a channel list 140. Note that the area name display area 130 and the channel list 140 do not need to be displayed on the monitor 120, but are shown for simplicity of explanation.

  The channel list 140 includes a remote control channel 141, a physical channel 142, and a broadcast station 143. The remote control channel 141, the physical channel 142, and the broadcast station 143 are associated with each other. The remote control channel 141 is a channel selected by the user. The physical channel 142 defines a specific frequency bandwidth. For example, the physical channel “24” associated with the remote control channel “1” is associated with 539 MHz. When the user selects the remote control channel “1”, the smartphone 100 receives a broadcast wave of 539 MHz and displays or records a television program of the broadcast station A.

  When the user moves to Hiroshima, the state of the smartphone 100 becomes the state (B). The smartphone 100 receives a channel list 160 that defines broadcast waves that can be viewed in Hiroshima. The channel list 160 includes a remote control channel 161, a physical channel 162, and a broadcast station 163. The remote control channel 161, the physical channel 162, and the broadcast station 163 are associated with each other. For example, when the user selects the remote control channel “1”, the smartphone 100 receives a broadcast wave having a frequency of 425 MHz associated with the physical channel “5”. Thereby, the smart phone 100 displays or records the television program of the broadcasting station F.

  Thus, the television programs that can be viewed vary depending on the viewing range. The smartphone 100 receives a channel list of the viewing range including the current location from the relay station. Using the channel list, the smartphone 100 can display or record a television program that can be viewed in the viewing range.

<Overview>
FIG. 2 is a diagram illustrating a state in which the smartphone 100 according to the first embodiment passes through a plurality of viewing ranges. With reference to FIG. 2, the outline | summary of the smart phone 100 according to 1st Embodiment is demonstrated.

  Relay station 220 and relay station 230 transmit broadcast waves received from the broadcast station. The first viewing range 221 indicates a range in which a broadcast wave transmitted from the relay station 220 can be received. The second viewing range 231 indicates a range in which a broadcast wave transmitted from the relay station 230 can be received. When the smartphone 100 is in the first viewing range 221, the smartphone 100 can receive the first channel list associated with the first viewing range 221. Further, when the smartphone 100 is in the second viewing range 231, the smartphone 100 can receive the second channel list associated with the second viewing range 231.

  Hereinafter, a range where the first viewing range 221 and the second viewing range 231 overlap is referred to as an “overlapping region”. The first viewing range 221 excluding the second viewing range 231 is referred to as a “first partial region”. The second viewing range 231 excluding the first viewing range 221 is referred to as a “second partial region”.

  The smartphone 100 receives the first channel list from the relay station 220 when the smartphone 100 is at the position 240 that is the first partial region. When the user moves from the position 240 to the position 241 that is the overlapping area, the smartphone 100 can receive both the first channel list and the second channel list. In this case, there is a problem whether the smartphone 100 maintains the first channel list or switches the first channel list to the second channel list.

  For example, when the user immediately leaves the overlapping area and moves to the position 243, which is the first partial area, it is better to maintain the first channel list. This is because video and audio are interrupted when the smartphone 100 frequently switches the channel list.

  Further, when the user moves to the position 245 which is the second partial area, it is better to switch the first channel list to the second channel list. This is because the smartphone 100 cannot display a television program using the first channel list in the second partial area.

  For this reason, when the user moves to the position 241 that is the overlapping area, the smartphone 100 estimates the position of the smartphone 100 after a predetermined time has elapsed (hereinafter also referred to as “predicted position”). A method for estimating the position of the smartphone 100 will be described later. For example, when the predicted position is the position 243, the smartphone 100 maintains the first channel list that is currently used. When the predicted positions are the position 242 and the position 245, the smartphone 100 switches the first channel list to the second channel list. Thereby, since the frequency which switches a channel list | wrist can be reduced, a broadcast wave can be received, without interrupting an image | video and an audio | voice.

  In one aspect, when the predicted position is 242, the smartphone 100 transmits from the relay station 230 and the reception sensitivity of the broadcast wave transmitted from the relay station 220 (hereinafter also referred to as “first reception sensitivity”). Whether to maintain the first channel list or switch the first channel list to the second channel list based on the reception sensitivity of the broadcast wave (hereinafter also referred to as “second reception sensitivity”). You may judge.

  When the first channel list is switched to the second channel list, the smartphone 100 changes the physical channel so that the displayed TV program or the recorded TV program does not change. For example, referring to FIG. 1 again, when the smartphone 100 moves from Osaka to Hiroshima while displaying or recording the TV program of the broadcasting station A, the physical channel is changed from “24” to “19”. . Thereby, the smart phone 100 can display or record the television program of the same broadcasting station A. Thereby, even when the smartphone 100 switches the second channel list from the first channel list, the same television program can be displayed or recorded.

<Hardware configuration>
FIG. 3 is a block diagram showing a hardware configuration of smartphone 100 according to the present embodiment. An example of the hardware configuration of the smartphone 100 will be described with reference to FIG.

  The smartphone 100 includes a ROM (Read Only Memory) 1, a CPU (Central Processing Unit) 2, a RAM (Random Access Memory) 3, a digital tuner 4, a GPS (Global Positioning System) controller 6, an orientation sensor 7, , An acceleration sensor 8, a speaker 9, a touch sensor 10, a memory card I / F (Interface) 11, a network I / F (Interface) 12, an auxiliary storage device 20, and a monitor 120. The auxiliary storage device 20 stores a viewing range list 320 and a channel list 325. Details of the viewing range list 320 and the channel list 325 will be described later.

  The ROM 1 stores an operating system (OS), an initial program (boot program) that is executed when the smartphone 100 is activated, and the like. The CPU 2 controls the operation of the smartphone 100 by executing various programs such as an operating system and a control program for the smartphone 100 stored in the ROM 1 and the auxiliary storage device 20. The RAM 3 functions as a working memory for executing a program by the CPU 2 and temporarily stores various data necessary for executing the program.

  The digital tuner 4 receives broadcast waves of one-segment broadcasting and other digital broadcasting via the antenna 50. The digital tuner 4 outputs a video signal and an audio signal to the CPU 2 according to the remote control channel selected by the user.

  The monitor 120 displays a television program based on the video signal. The monitor 120 may be configured as a touch panel in combination with the touch sensor 10. The touch panel accepts selection of a remote control channel. When the user selects a remote control channel, a television program corresponding to the remote control channel is displayed on the monitor 120. The GPS controller 6 receives a GPS signal or a position signal (positioning signal) from the base station via the antenna 60. The GPS controller 6 calculates the position information of the smartphone 100 from the received GPS signal or position signal. The GPS controller 6 outputs the received position information to the CPU 2.

  The direction sensor 7 detects the movement direction of the smartphone 100. The direction sensor 7 is a sensor capable of detecting the moving direction of the smartphone 100, for example, a geomagnetic sensor, an electronic compass, or the like. The direction sensor 7 outputs the detected moving direction to the CPU 2. The acceleration sensor 8 detects the acceleration of the smartphone 100. The acceleration sensor 8 outputs the detected acceleration to the CPU 2. The speaker 9 outputs sound based on the sound signal output from the digital tuner 4.

  The memory card I / F 11 reads / writes data from / to a memory card (nonvolatile storage medium) 30 such as an SD (Secure Digital) card or a CF (Compact Flash (registered trademark)) card. The network I / F 12 transmits / receives data to / from other communication devices via the antenna 40. For example, the other communication device is a smartphone, a personal computer, a server device, or other electronic device having a communication function.

<Functional configuration>
FIG. 4 is a block diagram showing a functional configuration of smartphone 100 according to the first embodiment. An example of a functional configuration of the smartphone 100 will be described with reference to FIG.

  The smartphone 100 includes a detection unit 410 and a control unit 415. Control unit 415 includes a position determination unit 420, a position estimation unit 430, a switching determination unit 440, and a calculation unit 450.

  The detection unit 410 detects movement information of the smartphone 100 as at least one of the GPS controller 6, the direction sensor 7, and the acceleration sensor 8, for example. The detection information includes, for example, at least one of the position, moving speed, acceleration, and moving direction of the smartphone 100. The detection unit 410 outputs the detected movement information to the position determination unit 420.

  The position determination unit 420 determines whether the position of the smartphone 100 has moved from the first partial region to the overlapping region based on the positional information output from the detection unit 410 and a viewing range list 320 described later. . The position determination unit 420 outputs the determination result to the position estimation unit 430.

  When the position determination unit 420 determines that the position of the smartphone 100 has moved from the first partial area to the overlapping area, the position estimation unit 430 estimates the predicted position based on the movement information. For example, the position estimation unit 430 records the past position of the smartphone 100 as history information, and estimates the predicted position from the history information. In this case, the position estimation unit 430 calculates a movement speed, a movement direction, and the like from two or more positions of the smartphone 100 included in the history information.

  The position estimation unit 430 estimates the predicted position based on the position of the smartphone 100, the moving speed, and the moving direction. Typically, the position estimation unit 430 calculates the movement distance by multiplying the movement speed by a predetermined time. The position estimation unit 430 sets a position that is separated from the current position by the moving distance in the same direction as the moving direction as the predicted position. The position estimation unit 430 outputs the predicted position to the switching determination unit 440.

  In a certain aspect, the position estimation unit 430 may estimate the predicted position based on the moving direction output from the direction sensor 7 and the acceleration output from the acceleration sensor 8. Further, the position estimation unit 430 may estimate the predicted position based on the moving speed obtained by integrating the acceleration.

  The calculation unit 450 calculates broadcast wave reception sensitivity. Typically, the calculation unit 450 calculates the first reception sensitivity and the second reception sensitivity when the position determination unit 420 determines that the first partial region has moved to the overlapping region. For example, the reception sensitivity is at least one of a C / N (Carrier / Noise) value, a RSSI (Received Signal Strength Indicator) value, a BER (Bit Error Rate) value, a PER (Packet Error Rate) value, and the like. It is possible to use. The calculation unit 450 outputs the calculated reception sensitivity to the switching determination unit 440.

  When the switching determination unit 440 determines that the predicted position is included in the first partial region, the switching determination unit 440 maintains the first channel list. In addition, when the switching determination unit 440 determines that the predicted position is included in the overlapping region or the second partial region, the switching determination unit 440 switches the first channel list to the second channel list.

  Alternatively, when the switching determination unit 440 determines that the predicted position is included in the first partial region or the overlapping region, the switching determination unit 440 maintains the first channel list so far, and the predicted position becomes the second partial region. If it is determined that it is included, it may be switched to the second channel list. Further, when it is determined that the predicted position is included in the overlapping region, whether to maintain the first channel list or to switch to the second channel list may be selected according to a predetermined condition.

  The smartphone 100 changes the physical channel so that the TV program being displayed or recorded does not change before and after switching the channel list. Typically, the smartphone 100 searches the second channel list for the same broadcast station as the broadcast station corresponding to the television program being displayed or recorded before switching. The smartphone 100 acquires a physical channel associated with the searched broadcast station from the second channel list. The smartphone 100 receives broadcast waves on the acquired physical channel.

  In a certain aspect, the switching determination unit 440 maintains the first channel list when the predicted position is included in the overlapping region and the first reception sensitivity is higher than the second reception sensitivity. In addition, the switching determination unit 440 switches the first channel list to the second channel list when the predicted position is included in the overlapping region and the first reception sensitivity number is lower than the second reception sensitivity. .

  In another aspect, switching determination unit 440 determines, based on the movement information, when the time for which smartphone 100 remains in the first partial region or the overlapping region is longer or longer than a predetermined time. May maintain the first channel list. In addition, the switching determination unit 440 determines that the time when the smartphone 100 remains in the first partial area or the overlapping area is shorter or shorter than a predetermined time based on the movement information. Switch the channel list of one to the second channel list.

<Data structure (list of viewing ranges)>
FIG. 5 is a diagram showing the data structure of the viewing range list 320. The data structure of the viewing range list 320 will be described with reference to FIG.

  The viewing range list 320 includes a relay station 321 and a viewing range 322. Typically, the viewing range list 320 is stored in the auxiliary storage device 20. The viewing range list 320 defines a viewing range in which the smartphone 100 can receive broadcast waves from a broadcasting station. For example, the viewing range is defined by two or more latitudes and longitudes. When the current location of the smartphone 100 is included in the viewing range surrounded by the two or more latitudes and longitudes, the smartphone 100 can receive a broadcast wave from a broadcasting station associated with the viewing range. The viewing range may be defined by coordinates on the map.

  As illustrated in FIG. 5, the “first relay station” and the “first viewing range” are associated with each other. The “second relay station” is associated with the “second viewing range”. The “third relay station” is associated with the “third viewing range”.

  The position determination unit 420 determines whether or not the current location of the smartphone 100 is included in two or more viewing ranges. If the position determination unit 420 determines that the current location of the smartphone 100 is included in two or more viewing ranges, the position determination unit 420 determines that the smartphone 100 has moved to the overlapping area. In addition, when the position determination unit 420 determines that the current location of the smartphone 100 is included in one viewing range, the position determination unit 420 determines that the smartphone 100 has moved to the partial area. When the current location of the smartphone 100 is not included in the viewing range, it indicates that there is no viewable broadcast wave.

  In one aspect, the viewing range list 320 defines a plurality of relay stations and positions of the plurality of relay stations in association with each other. In this case, a predetermined range from the position of each relay station is the viewing range. If the position determination unit 420 determines that the current location is included in two or more viewing ranges, the position determination unit 420 determines that the smartphone 100 has moved to the overlapping area.

<Data structure (channel list)>
FIG. 6 is a diagram illustrating a data structure of the channel list 325. With reference to FIG. 6, the data structure of channel list 325 will be described.

  The channel list 325 includes a remote control channel 326, a physical channel 327, and a broadcasting station 328. Typically, the channel list 325 is stored in the auxiliary storage device 20. The physical channel 327 defines a specific frequency bandwidth. When the user selects the remote control channel “1”, the smartphone 100 receives a broadcast wave in the frequency band of the physical channel “24”. Thereby, the smart phone 100 displays or records the television program of the broadcasting station A.

  When the switching determination unit 440 determines that the predicted position is included in the overlapping region or the second partial range, the switching determination unit 440 switches the first channel list to the second channel list. In this case, the second channel list may be stored in advance in the auxiliary storage device 20, or may be newly received when the channel list is switched.

<Data flow>
FIG. 7 is a sequence diagram schematically illustrating the flow of data exchange between smartphone 100, relay station 220, and relay station 230 according to the present embodiment. With reference to FIG. 7, the flow of channel list data exchange will be described.

  With reference to FIG. 7, when the smartphone 100 moves to the first partial area (step S <b> 510), the smartphone 100 transmits a channel list acquisition request to the relay station 220. When the relay station 220 receives the channel list acquisition request (step S520), the relay station 220 transmits the first channel list to the smartphone 100.

  When the smartphone 100 moves to the overlapping area (step S530), the smartphone 100 determines whether or not the current location is included in the first partial area (step S540). If the current location is included in the first partial area (YES in step S540), smartphone 100 maintains the first channel list. If the current location is not included in the first partial area (NO in step S540), smartphone 100 transmits a channel list acquisition request to relay station 230.

  When receiving the channel list acquisition request from the smartphone 100, the relay station 230 transmits the second channel list to the smartphone 100 (step S550). When receiving the second channel list, the smartphone 100 switches the first channel list to the second channel list (step S560).

<Control structure>
FIG. 8 is a flowchart showing a part of processing executed by smartphone 100 according to the first embodiment. The processing in FIG. 8 is realized by the CPU 2 executing a program. In other aspects, some or all of the processing may be performed by circuit elements or other hardware. In the following description, recording of a TV program will be described, but viewing of a TV program may be used.

  In step S600, the CPU 2 determines whether or not it is a certain time before the start of recording based on the scheduled recording time. When CPU 2 determines that it is a predetermined time before the start of recording based on the scheduled recording time (YES in step S600), CPU 2 switches control to step S610. If CPU 2 determines that it is not a certain time before the start of recording based on the scheduled recording time (NO in step S600), CPU 2 switches control to step S600.

  In step S610, the CPU 2 determines whether or not the channel list needs to be changed. Typically, the CPU 2 changes the channel list when the channel list at the time of reservation is different from the channel list corresponding to the first viewing range including the current location. When CPU 2 determines that the channel list needs to be changed (YES in step S610), CPU 2 switches control to step S611. When CPU 2 determines that it is not necessary to change the channel list (NO in step S610), CPU 2 switches control to step S613.

  In step S611, the CPU 2 switches from the reserved channel list to the first channel list corresponding to the first viewing range. In step S613, the CPU 2 starts recording. Typically, the recorded video is stored in the auxiliary storage device 20. In step S620, the CPU 2 determines, as the position determination unit 420, whether the smartphone 100 has moved to the overlapping area. When CPU 2 determines that smartphone 100 has moved to the overlapping area (YES in step S620), CPU 2 switches control to step S630. When CPU 2 determines that smartphone 100 has not moved to the overlapping area (NO in step S620), CPU 2 switches control to step S620.

  In step S630, CPU2 determines whether the smart phone 100 is moving. Typically, the CPU 2 determines that the smartphone 100 is moving when the speed of the smartphone 100 exceeds a predetermined value. When CPU 2 determines that smartphone 100 is moving (YES in step S630), CPU 2 switches control to step S631. When CPU 2 determines that smartphone 100 is not moving (NO in step S630), CPU 2 ends the process. That is, the smartphone 100 maintains the first channel list.

  In step S631, as the position estimation unit 430, the CPU 2 estimates the position of the smartphone 100 after elapse of a predetermined time based on the movement information.

  In step S640, the CPU 2 determines, as the switching determination unit 440, whether or not the predicted position is included in the first partial region. When CPU 2 determines that the predicted position is included in the first partial region (YES in step S640), CPU 2 ends the process. That is, the smartphone 100 maintains the first channel list. When CPU 2 determines that the predicted position is not included in the first partial region (NO in step S640), CPU 2 switches control to step S641.

  In step S641, the CPU 2 switches the first channel list to the second channel list as the switching determination unit 440. In step S642, the CPU 2 changes the physical channel so that the recorded TV program does not change. For example, the CPU 2 changes the physical channel so that the broadcast stations are the same before and after switching the channel list.

<Advantages>
According to smartphone 100 according to the present embodiment, the frequency of switching the channel list can be reduced, so that broadcast waves can be received without interrupting video and audio. Even when the smartphone 100 switches the channel list, the same television program can be displayed or recorded. Furthermore, even when the predicted position of the smartphone 100 is in the overlapping region, the channel list can be appropriately switched based on the reception sensitivity of the broadcast wave.

  In the above description, when the smartphone 100 moves from the first partial area to the overlapping area, when the predicted position is determined to be included in the overlapping area, an example of switching to the second channel list is mainly shown. It is not limited to this. That is, when it is determined that the predicted position is included in the first partial area or the overlapping area, it is determined that the previous first channel list is maintained and the predicted position is included in the second partial area. In such a case, it may be switched to the second channel list.

  Further, when it is determined that the predicted position is included in the overlapping region, whether to maintain the first channel list or switch to the second channel list may be changed depending on the condition. In any case, since the frequency of switching the channel list can be reduced, broadcast waves can be received without interrupting video and audio.

[Second Embodiment]
<Overview>
Hereinafter, smartphone 100A according to the second embodiment will be described. Smartphone 100A according to the present embodiment is different from smartphone 100 according to the first embodiment in that a predicted position is estimated using map information. Since it is the same as that of the smart phone 100 according to 1st Embodiment about another point, description is not repeated.

  FIG. 9 is a diagram illustrating a state in which the smartphone 100A according to the second embodiment passes through a plurality of viewing ranges. With reference to FIG. 9, the estimation method of a predicted position using map information is demonstrated.

  When the smartphone 100 </ b> A moves to the position 241 that is the overlapping area, the smartphone 100 </ b> A estimates the predicted position based on the movement speed, the movement direction, and the map information. For example, the map information defines the position of the road with coordinates. Typically, the smartphone 100A calculates the movement distance by multiplying the movement speed by a predetermined time. The smartphone 100A sets the position (position 243) moved from the current position (position 241) on the road 210 in the movement direction by the calculated movement distance (position 243) as the estimated position.

<Advantages>
Since the predicted position is estimated using the map information of the smartphone 100A as described above, the predicted position can be estimated more accurately.

[Third Embodiment]
<Overview>
Hereinafter, smartphone 100B according to the third embodiment will be described. Smartphone 100B according to the present embodiment is different from smartphone 100 according to the first embodiment in that it is configured to receive a user's destination. Since it is the same as that of the smart phone 100 according to 1st Embodiment about another point, description is not repeated.

  Smartphone 100B is configured to accept a destination. The smartphone 100B estimates the predicted position from the current location and the destination. For example, the smartphone 100B estimates that the estimated position is within a predetermined distance from a line connecting the current location and the destination.

<Advantages>
Since the predicted position is estimated using the map information of the smartphone 100B as described above, the predicted position can be estimated more accurately.

[Fourth Embodiment]
<Overview>
Hereinafter, smartphone 100C according to the fourth embodiment will be described. Smartphone 100C according to the present embodiment is different from smartphone 100 in that at least one of the functions of smartphone 100 according to the first embodiment is provided by a so-called cloud service. Since it is the same as that of the smart phone 100 according to 1st Embodiment about another point, description is not repeated.

  At least one of the position determination unit 420, the position estimation unit 430, the switching determination unit 440, and the calculation unit 450 of the function of the smartphone 100C is provided by a so-called cloud service. In this case, at least one server device performs these functions.

  For example, the smartphone 100C transmits the current location and movement information to the server device (cloud side). Server device (cloud side) performs processing of smartphone 100 according to the present embodiment based on the transmitted information. Furthermore, it is not necessary for the server device (cloud side) to perform all the processing, and the smartphone 100 and the server device may cooperate to implement the processing according to the present embodiment. In addition, the smartphone 100C may be configured such that at least one of the viewing range list 320 and the channel list 325 is stored in the server device.

<Advantages>
As described above, the smartphone 100C only needs to have the minimum functions and data, and thus the memory capacity can be reduced.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 ROM, 2 CPU, 3 RAM, 4 digital tuner, 6 controller, 7 direction sensor, 8 acceleration sensor, 9 speaker, 10 touch sensor, 11 memory card I / F, 12 network I / F, 20 auxiliary storage device, 40 , 50, 60 Antenna, 100 Smartphone, 120 Monitor, 130 Area name display area, 140, 160, 325 Channel list, 141, 161, 326 Remote control channel, 142, 162, 327 Physical channel, 143, 163, 328, 520 Broadcast Station, 210 road, 220, 230, 321 relay station, 221 first viewing range, 231 second viewing range, 240, 241, 242, 243, 245 position, 320 viewing range list, 322 viewing range, 410 detector 420 position Cutting part, 430 position estimation part, 440 switching judgment part, 450 calculation part.

Claims (5)

A portable terminal device capable of receiving a broadcast wave of digital broadcasting,
Detecting means for detecting movement information including the position of the mobile terminal device;
A memory for storing a first broadcast channel system corresponding to a broadcast station in the first viewing range capable of receiving the broadcast wave and a second broadcast channel system corresponding to the broadcast station in a second viewing range. Means,
Control means capable of switching to a broadcast channel system corresponding to the viewing range including the position of the mobile terminal device,
The control means includes
Whether the mobile terminal device has moved from the first viewing range excluding the second viewing range to a range where the first viewing range and the second viewing range overlap based on the movement information Position determination means for determining whether or not
When it is determined that the position has been moved from the first viewing range excluding the second viewing range to the overlapping range based on the determination result of the position determination unit, after a predetermined time has elapsed based on the movement information Position estimation means for estimating the position of the mobile terminal device;
When it is determined that the position of the mobile terminal device estimated by the position estimation means is included in the first viewing range except the second viewing range, the first broadcast channel system is maintained, When it is determined that it is included in the second viewing range excluding the first viewing range, it is switched to the second broadcast channel system, and when it is determined that it is included in the overlapping range, the first broadcast And a switching determination unit for selecting whether to maintain the channel system or to switch to the second broadcast channel system according to a predetermined condition. The movement information further includes a movement speed and a movement direction of the mobile terminal device,
The position estimation means estimates the position of the portable terminal device after the predetermined time has elapsed based on the position of the portable terminal device, the moving speed, and the moving direction included in the movement information. The mobile terminal device according to claim 1. The control means receives the broadcast wave of the first broadcast channel system when the position judging means judges that the first viewing range except the second viewing range has moved to the overlapping range. A calculation means for calculating the sensitivity and the reception sensitivity of the broadcast wave of the second broadcast channel system;
When the position of the mobile terminal device estimated by the position estimation unit is included in the overlapping range, the switching determination unit determines whether the second broadcast channel system has a reception sensitivity of the broadcast wave, or the second The portable terminal device according to claim 1 or 2, wherein a broadcast channel system having a high reception sensitivity is selected from broadcast wave reception sensitivity of a broadcast channel system. A method for controlling a mobile terminal device capable of receiving a broadcast wave of digital broadcasting,
The portable terminal device includes a first broadcast channel system corresponding to a broadcast station in a first viewing range capable of receiving the broadcast wave, and a second broadcast channel system corresponding to the broadcast station in a second viewing range; Storage means for storing
The method
Detecting movement information including a position of the mobile terminal device;
Whether the mobile terminal device has moved from the first viewing range excluding the second viewing range to a range where the first viewing range and the second viewing range overlap based on the movement information A step of determining whether or not
If it is determined in the determining step that the first viewing range excluding the second viewing range has moved to the overlapping range, the mobile phone after the elapse of a predetermined time based on the movement information Estimating the position of the terminal device;
Maintaining the first broadcast channel system when it is determined that the position of the portable terminal device estimated by the estimating step is included in the first viewing range except the second viewing range. When,
Switching to the second broadcast channel system when it is determined that the position of the mobile terminal device estimated by the estimating step is included in the second viewing range excluding the first viewing range; ,
When it is determined that the position of the mobile terminal device estimated in the estimating step is included in the overlapping range, whether to maintain the first broadcast channel system or switch to the second broadcast channel system And a step of selecting according to a predetermined condition. A program for controlling a mobile terminal device capable of receiving a broadcast wave of digital broadcasting,
The portable terminal device includes a first broadcast channel system corresponding to a broadcast station in a first viewing range capable of receiving the broadcast wave, and a second broadcast channel system corresponding to the broadcast station in a second viewing range; Storage means for storing the processor, and a processor,
The program is stored in the processor.
Receiving movement information including the position of the mobile terminal device;
Whether the mobile terminal device has moved from the first viewing range excluding the second viewing range to a range where the first viewing range and the second viewing range overlap based on the movement information A step of determining whether or not
If it is determined in the determining step that the first viewing range excluding the second viewing range has moved to the overlapping range, the mobile phone after the elapse of a predetermined time based on the movement information Estimating the position of the terminal device;
Maintaining the first broadcast channel system when it is determined that the position of the portable terminal device estimated by the estimating step is included in the first viewing range except the second viewing range. When,
Switching to the second broadcast channel system when it is determined that the position of the mobile terminal device estimated by the estimating step is included in the second viewing range excluding the first viewing range; ,
When it is determined that the position of the mobile terminal device estimated in the estimating step is included in the overlapping range, whether to maintain the first broadcast channel system or switch to the second broadcast channel system The control program of a portable terminal device which performs the step selected according to predetermined conditions.

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