JP2005277727A - Mobile digital broadcast receiving system, information center, and mobile body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile digital broadcast receiving system, an information center, and a mobile body whereby the mobile body can continuously receive digital broadcasting without interruption even when the mobile body moves between broadcast areas. <P>SOLUTION: During reception of a digital broadcast program and a data broadcast program, a reception level discrimination unit 22 measures a reception level changed attended with movement of a vehicle at any time and a channel selection unit 28 discriminates whether or not a condition, wherein a reception fault is likely caused, is detected depending on the measured reception level. If the channel selection unit 28 detects the condition wherein a reception fault is likely caused, the channel selection unit 28 selects a digital broadcast area corresponding to a position of its own vehicle from other digital broadcast areas stored in a digital broadcast data storage unit 26 discriminated by the information center on the basis of path information in advance. When the same program as the data reception broadcast program viewed at present exists in the selected digital broadcast area, the channel selection unit 28 switches the present viewed program into the program of the selected digital broadcast area. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile digital broadcast receiving system, an information center, and a mobile body that are used to receive a digital broadcast in a vehicle such as an automobile.

  Conventionally, a navigation device that allows a user to input a favorite genre, calculates route information to a destination, and performs navigation is used to set a route according to the movement of the user, and on the route from the current location to the destination. At each point, select a broadcasting station that broadcasts programs of the user's favorite genre, create a program plan to receive the broadcast program, and let the moving user listen to the broadcast program according to the program plan There is an automatic program configuration device. Specifically, the program plan creation means is based on the program guide of each broadcasting station on the route to the destination, the user's favorite genre, and the current time when the program plan is created, on the route to the destination. A broadcast plan to be received at each point is determined and a program plan is created. Then, based on the program plan, the output switching means automatically switches the broadcast radio wave received by the broadcast acquisition means according to the position on the path of the moving body and outputs it from the speaker (see, for example, Patent Document 1). .

  In addition, when a terrestrial digital broadcast is received by a mobile body, when the mobile body moves so that the same program can be easily received even if the mobile body is out of the current reception area, There is a digital broadcast receiver that switches a broadcast station to be received based on frequency information. Specifically, a navigation system that performs navigation to a destination in a digital broadcasting receiver, and a broadcasting station that can receive from the current location information obtained by the navigation system when the reception level decreases and reception becomes impossible Broadcast station search means for searching for a program that has been received from the broadcast station searched by the broadcast station search means until just before (for example, see Patent Document 2).

Similarly, when terrestrial digital broadcasting is received by a mobile unit, channel selection information other than terrestrial digital broadcasting is selected so that the mobile unit can easily receive the same program even if it is out of the current reception area. Some channels are acquired by communication means and selected. Specifically, when it is difficult to receive a program outside the reception area while the moving body is moving, it is necessary to communicate via a communication means capable of acquiring information on the road such as FM character multiplex broadcasting, optical beacon, and radio beacon. Thus, new channel selection information that can be received at the current location is acquired. This makes it possible to immediately select the same program without performing a channel search by a terrestrial digital broadcast receiver (see, for example, Patent Document 3).
JP 2002-152067 A JP 2001-285101 A JP 2002-353829 A

  By the way, in the conventional apparatus described in Patent Document 1, a broadcasting station that broadcasts a program of a user's favorite genre at each point on the route from the current location to the destination accompanying the movement of the moving body. To select a broadcasting station to receive at each point on the route to the destination, and to create a program plan by the mobile program automatic configuration device. There is a problem that the processing load on the system increases. In particular, an increase in processing load on the device causes an increase in power consumption of the device and an increase in the size of the device. Therefore, when the mobile body is a vehicle such as an automobile, the device is mounted on the vehicle as the power consumption increases or increases in size. There was a problem that it was no longer suitable.

  On the other hand, in the conventional apparatus described in Patent Document 2 and Patent Document 3, the frequency information of the broadcast station stored in advance so that the mobile body can easily receive the same program even if it is out of the current reception area, Although the broadcasting station to be received is switched based on the channel selection information at the current location acquired by communication means other than terrestrial digital broadcasting, these devices, including the conventional device described in Patent Document 1 described above, Because the mobile unit leaves the current receiving area (broadcasting area) or moves to the next area, the receiving station is switched to the receiving station after it becomes unreceivable. There was a problem that.

  The present invention has been made in view of the above problems, and when receiving digital broadcast in a vehicle such as an automobile, mobile digital broadcast capable of continuously receiving digital broadcast without interruption even if it moves between broadcast areas. An object is to provide a receiving system, an information center, and a mobile unit.

  In order to solve the above problems, a mobile digital broadcast receiving system according to the invention of claim 1 includes a mobile body (for example, mobile device 1 of an embodiment described later) and an information center (for example, information center 2 of an embodiment described later). ), A communication terminal for communicating with the outside (for example, a communication terminal 16 in an embodiment described later), and a route for calculating route information to the destination. Information calculation means (for example, a route guidance calculator 42 in an embodiment to be described later) and route information transmission means for transmitting route information to the destination output by the route information calculation means to the information center via the communication terminal ( For example, a communication data transmitter / receiver 43) of an embodiment to be described later, digital broadcast area information on a route to the destination, and program information in the digital broadcast area are transmitted to the communication terminal. Broadcast information receiving means (for example, communication data transmitter / receiver 43 of the embodiment described later) via the information center, and storage means for storing the digital broadcast area information and the program information (for example, embodiment described later). A digital broadcast receiver (for example, a digital broadcast receiver 12 of an embodiment to be described later) having a digital broadcast data storage unit 26) for receiving a digital broadcast, and the information center is transmitted from the communication terminal The route information of the mobile unit is received, the digital broadcast area on the route of the mobile unit is determined based on the route information, and the determined digital broadcast area information and the program information in the digital broadcast area are moved It is transmitted to the body.

  In the mobile digital broadcast receiving system having the above configuration, the mobile body calculates the route information of the mobile body by the route information calculation means, and sends the route information to the information center by the route information transmission means via the communication terminal. In the information center, the digital broadcast area on the route of the mobile unit is determined based on the route information transmitted from the mobile unit, the determined digital broadcast area information, and the program information in the digital broadcast area Is previously transmitted to the moving body. On the other hand, in the mobile body, the digital broadcast area information on the path of the mobile body transmitted from the information center and the program information in the digital broadcast area are received by the broadcast information receiving means, and stored in the digital broadcast receiver. By accumulating in the means, the digital broadcast area and the received program that change with the movement can be switched based on the digital broadcast area information received from the information center in advance and the program information in the digital broadcast area.

  A mobile digital broadcast receiving system according to a second aspect of the present invention is a mobile digital broadcast having a mobile (for example, mobile device 1 of an embodiment described later) and an information center (for example, information center 2 of an embodiment described later). In the receiving system, the mobile unit communicates with the outside (for example, a communication terminal 16 in the embodiment described later) and position evaluation means for evaluating the current location (for example, own vehicle position rating in the embodiment described later). Device 41), location information transmitting means for transmitting destination information and current location information output by the location rating means to the information center via the communication terminal (for example, a communication data transmitter / receiver 43 in an embodiment described later), The digital broadcast area information on the route based on the destination information and the current location information and the program information in the digital broadcast area are transmitted via the communication terminal to the information set. Broadcast information receiving means (for example, communication data transmitter / receiver 43 in the embodiment described later) and storage means for storing the digital broadcast area information and the program information (for example, digital broadcast data in the embodiment described later). A digital broadcast receiver (for example, a digital broadcast receiver 12 of an embodiment to be described later) having a storage 26), and the information center of the mobile unit transmitted from the communication terminal. Receiving destination information and current location information, calculating route information of the mobile object, determining a digital broadcast area on the route of the mobile object based on the route information, and determining the determined digital broadcast area information; and Program information in the digital broadcast area is transmitted to the mobile body.

  In the mobile digital broadcast receiving system having the above configuration, the mobile body evaluates the current location by the location rating means, and transmits the destination information and the current location information to the information center by the location information transmission means via the communication terminal. The information center receives the destination information and the current location information transmitted from the mobile body, calculates the route information of the mobile body, and determines the digital broadcast area on the path of the mobile body based on the route information. The determined digital broadcast area information and the program information in the digital broadcast area are transmitted in advance to the mobile body. On the other hand, the mobile body receives digital broadcast area information from the information center by the broadcast information receiving means and the program information in the digital broadcast area from the information center without calculating the path information. Based on the digital broadcast area information received from the information center in advance and the program information in the digital broadcast area, the digital broadcast area and the received program that change with the movement are stored in the storage means provided in the machine. Can be switched.

  A mobile digital broadcast receiving system according to a third aspect of the present invention is the mobile digital broadcast receiving system according to the first or second aspect, wherein at least the program information passes through the digital broadcast area. The program information of the scheduled time zone to be included is included.

  The mobile digital broadcast receiving system having the above-described configuration allows the program information acquired from the information center in advance to be at least program information of a scheduled time zone in which the mobile body passes through each digital broadcast area. The amount of information related to communication with the mobile unit is set to the minimum necessary amount of information, and the mobile unit stores only the minimum digital broadcast area information and program information in the storage means. The changing digital broadcast area and the received program can be switched appropriately.

  A mobile digital broadcast receiving system according to a fourth aspect of the present invention is the mobile digital broadcast receiving system according to any one of the first to third aspects, wherein when the route to the destination is changed, the broadcast The information receiving means updates the difference between the digital broadcast area information and the program information before the route change and after the route change.

  In the mobile digital broadcast receiving system having the above configuration, the broadcast information receiving means updates the difference between the digital broadcast area information and the program information before and after the route change to the destination, It is possible to reduce the processing load on the mobile body and to make the amount of information related to communication from the information center to the mobile body the minimum necessary information amount.

  A mobile digital broadcast receiving system according to a fifth aspect of the present invention is the mobile digital broadcast receiving system according to any one of the first to fourth aspects, wherein the digital broadcast receiver determines the reception quality of the digital broadcast. Receiving quality judging means (for example, receiving level judging device 22 in the embodiment described later) and program changing means (for example, channel selector 28 in the embodiment described later) for changing the received program. When it is detected from the determination result that a reception failure is likely to occur, the program change unit can receive the received program based on the digital broadcast area information stored in the storage unit before the reception failure occurs. It is characterized by changing to a program in a digital broadcasting area.

  In the mobile digital broadcast receiving system having the above configuration, the program changing unit changes the program received before the reception failure occurs to the program in the digital broadcasting area that can be received according to the determination result by the reception quality determining unit. As a result, even if the moving body moves between broadcast areas, digital broadcasting can be continuously received without interruption in the moving body.

  A mobile digital broadcast receiving system according to a sixth aspect of the present invention is the mobile digital broadcast receiving system according to the fifth aspect, wherein there is the same program as the program received in the receivable digital broadcast area program. In this case, the program changing means changes the received program to the same program in the receivable digital broadcast area.

  In the mobile digital broadcast receiving system having the above configuration, the program changing means changes the received program to the same program in the digital broadcast area where the received program can be received. The same program can be continuously received without interruption in the body.

  The information center according to the invention of claim 7 is a communication means for communicating with a communication terminal (for example, a communication terminal 16 of an embodiment to be described later) installed in a mobile body (for example, a mobile device 1 of an embodiment to be described later). For example, based on the information input unit 101 and the information output unit 105) of the embodiment to be described later and the route information of the mobile body received via the communication means, the digital broadcasting area on the route of the mobile body is determined, Broadcast area determination means for outputting digital broadcast area information (for example, broadcast area determination section 102 in the embodiment described later) and program information determination means for acquiring program information in the determined digital broadcast area (for example, in the embodiment described later). Program information determination unit 103), the digital broadcast area information, and transmission means for transmitting the program information of the digital broadcast area to the mobile body via the communication means For example and having the processor 104) and the embodiments to be described later.

  In the information center having the above configuration, the broadcast area determining means determines the digital broadcast area on the route of the mobile body based on the route information of the mobile body received from the mobile body by the communication means, and the digital broadcast area The information is output, and the program information determination means acquires the program information of the determined digital broadcast area. Then, the transmission means transmits the digital broadcast area and the program information on the route of the mobile unit to the mobile unit, so that the mobile unit does not place a burden on the digital broadcast area on the route to the destination. The digital broadcast area and the program information thereof can be provided to the mobile unit.

  The information center according to the invention of claim 8 is a communication means for communicating with a communication terminal (for example, a communication terminal 16 of an embodiment to be described later) installed in a mobile body (for example, a mobile device 1 of an embodiment to be described later). For example, the route information of the mobile unit is calculated from the destination information and the current location information of the mobile unit received via the communication means and the information input unit 101 and the information output unit 105) of the embodiment described later. Broadcast area determination means (for example, a broadcast area determination unit 102 in an embodiment to be described later) that determines a digital broadcast area on the route of the mobile body based on information and outputs digital broadcast area information; and the determined digital broadcast Program information determination means (for example, a program information determination unit 103 in an embodiment described later) for acquiring the program information of the area, the digital broadcast area information, and the number of the digital broadcast area Information, and having a transmitting means for transmitting through said communication means to said mobile (e.g. the processor 104 of the embodiment described later).

  In the information center having the above configuration, the broadcast area determination unit calculates the route information of the mobile unit based on the destination information and the current location information of the mobile unit received from the mobile unit by the communication unit. The digital broadcast area is determined, digital broadcast area information is output, and program information determination means acquires program information of the determined digital broadcast area. The transmission means transmits the digital broadcast area on the route of the mobile unit and the program information thereof to the mobile unit, so that the mobile unit does not place a burden on the digital broadcast area determination and the calculation of the route information. The digital broadcasting area on the route to the ground and its program information can be provided to the mobile unit.

  An information center according to an invention of claim 9 is the information center according to claim 7 or claim 8, wherein at least the program information includes program information of a scheduled time zone in which the mobile body passes through the digital broadcast area. It is characterized by including.

  The information center having the above-described configuration reduces the amount of information in communication to the mobile unit by setting the program information to be transmitted to the mobile unit as program information at least at a scheduled time zone when the mobile unit passes each digital broadcasting area. It can be the minimum necessary.

  The mobile body according to the invention of claim 10 includes a communication terminal (for example, a communication terminal 16 in an embodiment described later) that communicates with the outside, and route information calculation means (for example, an implementation described later) that calculates route information to the destination. Example route guidance calculator 42) and route information transmission for transmitting route information to the destination output by the route information calculation means to the information center (for example, information center 2 in the embodiment described later) via the communication terminal. Means (for example, a communication data transmitter / receiver 43 in an embodiment described later), digital broadcasting area information on a route to the destination, and program information in the digital broadcasting area are received from the information center via the communication terminal. Broadcast information receiving means (for example, a communication data transmitter / receiver 43 in an embodiment described later) and storage means for storing the digital broadcast area information and the program information ( For example, in a mobile body including a digital broadcast receiver (for example, a digital broadcast receiver 12 of an embodiment described later) that receives a digital broadcast including the digital broadcast data storage 26 of the embodiment described later, the digital broadcast reception is performed. A reception quality determination means (for example, a reception level determination unit 22 in the embodiment described later) and a program change means (for example, a channel selector 28 in the embodiment described later) for changing the received program. And the digital broadcast area stored in the storage means before the reception failure occurs when a situation where a reception failure is likely to occur is detected from the determination result of the reception quality determination means. Based on the information, the received program is changed to a program in a digital broadcast area that can be received.

  When the mobile unit having the above configuration transmits the route information calculated by the route information calculation unit to the information center via the communication terminal, the route information transmission unit transmits the route information to the destination from the information center. Since the digital broadcast area information and the program information in the digital broadcast area are transmitted, this is received by the broadcast information receiving means and stored in the storage means provided in the digital broadcast receiver. On the other hand, if the reception quality determination means provided in the digital broadcast receiver determines the reception quality of the digital broadcast and detects a situation where a reception failure is likely to occur, before the reception failure occurs, the program change means, By changing the received program to a program in another digital broadcast area that can be received, the digital broadcast can be continuously received without interruption even when moving between broadcast areas.

  The mobile object according to the invention of claim 11 includes a communication terminal (for example, a communication terminal 16 in an embodiment described later) that communicates with the outside, and a position rating means that evaluates the current location (for example, an own vehicle position rating in an embodiment described later). Device 41) and location information transmitting means (for example, implementation described later) for transmitting destination information and current location information output by the position rating means to an information center (for example, information center 2 in an embodiment described later) via the communication terminal. Example communication data transmitter / receiver 43) receives digital broadcast area information on a route based on the destination information and the current location information, and program information in the digital broadcast area from the information center via the communication terminal. Broadcast information receiving means (for example, a communication data transmitter / receiver 43 in an embodiment described later), storage for storing the digital broadcast area information, and the program information. In a mobile body comprising means (for example, a digital broadcast receiver 12 of an embodiment to be described later) for receiving a digital broadcast provided with a means (for example, a digital broadcast data accumulator 26 of an embodiment to be described later). The broadcast receiver has a reception quality determination means (for example, a reception level determination unit 22 in the embodiment described later) for determining the reception quality of the digital broadcast, and a program change means (for example, a channel selector in the embodiment described later) for changing the received program. 28), and when the situation that a reception failure is likely to occur is detected from the determination result of the reception quality determination unit, the program change unit stores the digital stored in the storage unit before the reception failure occurs. Based on the broadcast area information, the received program is changed to a program in a digital broadcast area that can be received.

  When the mobile object having the above configuration evaluates the current location by the position evaluation means, and the position information transmission means transmits the destination information and the current location information to the information center via the communication terminal, the route from the information center to the mobile object Since the above digital broadcast area information and program information in the digital broadcast area are transmitted, they are received by the broadcast information receiving means and stored in the storage means provided in the digital broadcast receiver. On the other hand, if the reception quality determination means provided in the digital broadcast receiver determines the reception quality of the digital broadcast and detects a situation where a reception failure is likely to occur, before the reception failure occurs, the program change means, Change the received program to a program in another digital broadcasting area that can receive the program. As a result, the digital broadcast area information on the route and the program information in the digital broadcast area can be acquired simply by notifying the information center of the destination information and the current location information. Broadcast can be continuously received.

  A mobile object according to a twelfth aspect of the present invention is the mobile object according to the tenth or eleventh aspect, wherein at least the program information includes program information of a scheduled time zone that passes through the digital broadcast area. And

  The mobile unit having the above configuration is configured so that program information acquired from the information center in advance is at least program information of a scheduled time zone in which the mobile unit passes through each digital broadcasting area. The amount of information related to communication is made the minimum necessary amount of information, and the minimum digital broadcast area information and program information are only stored in the storage means, and the digital broadcast area and received program that change with the movement are stored. Can be switched appropriately.

  The mobile body according to the invention of claim 13 is the mobile body according to any one of claims 10 to 12, wherein when the route to the destination is changed, the broadcast information receiving means And the difference between the digital broadcast area information and the program information after the route change is updated.

  In the mobile body having the above configuration, the broadcast information receiving means updates the difference between the digital broadcast area information and the program information before and after the route change to the destination, thereby processing the information center and the mobile body. In addition to reducing the burden, the amount of information related to communication from the information center to the mobile unit can be made the minimum necessary amount of information.

  The mobile body according to the invention of claim 14 is the mobile body according to any one of claims 10 to 13, wherein there is the same program as the program received in the program of the receivable digital broadcast area. The program changing means changes the received program to the same program in the receivable digital broadcast area.

  The mobile unit having the above configuration allows the program change means to continuously receive the same program without interruption even if it moves between broadcast areas by changing the received program to the same program in the digital broadcast area where the received program can be received. can do.

According to the mobile digital broadcast receiving system according to claim 1, the mobile body receives the digital broadcast area information and the received program that change with the movement from the information center in advance, and the digital Switching can be performed based on program information in the broadcast area.
Therefore, when receiving a digital broadcast on a mobile unit, even if it moves between broadcast areas, it automatically receives an appropriate received program without placing a processing burden on the mobile unit and without any user operation. The effect that the mobile digital broadcast receiving system which can do is realizable is acquired.

According to the mobile digital broadcast receiving system according to claim 2, the mobile body receives from the information center in advance a digital broadcast area and a received program that change with the movement without calculating route information. The digital broadcasting area information and the program information in the digital broadcasting area can be switched.
Therefore, when receiving a digital broadcast on a mobile unit, the route information of the mobile unit is also calculated on the information center side, so that even if the mobile unit moves between broadcast areas, the appropriate information is automatically obtained without any user operation. There is an effect that it is possible to realize a mobile digital broadcast receiving system that can receive a received program and that further reduces the processing load on the mobile.

According to the mobile digital broadcast receiving system according to claim 3, the mobile body only stores the minimum digital broadcast area information and program information in the storage means, and the digital broadcast changes according to the movement. Areas and received programs can be switched appropriately.
Accordingly, it is possible to keep the size of the storage means to a minimum, and it is possible to reduce the size of the mobile body or to reduce the proportion of the device portion for receiving digital broadcasts in the mobile body. An effect is obtained.

According to the mobile digital broadcast receiving system according to claim 4, the processing load on the information center and the mobile body is reduced, and the information amount related to communication from the information center to the mobile body is set to the minimum necessary information amount. be able to.
Accordingly, communication traffic (traffic) from the information center to the mobile unit and the respective processing burdens can be reduced, and the communication time can be shortened. Therefore, power consumption in the information center and mobile unit can be reduced. In addition, by shortening the communication time per mobile unit, it is possible to improve the response of communication from the information center to each mobile unit.

According to the mobile digital broadcast receiving system of the fifth aspect, even if the mobile body moves between broadcast areas, the digital broadcast can be continuously received without interruption in the mobile body.
Therefore, when a digital broadcast is received by a mobile body, even if it moves between broadcast areas, the received program can be automatically changed without any user operation, and the digital broadcast can be continuously received without interruption. The effect that a mobile digital broadcast receiving system can be realized is obtained.

According to the mobile digital broadcast receiving system of the sixth aspect, even if the mobile body moves between broadcast areas, the same program can be continuously received without interruption in the mobile body.
Therefore, when a digital broadcast is received by a mobile body, even if it moves between broadcast areas, the mobile digital broadcast reception system can automatically receive the same program without interrupting the user's operation without interruption. The effect that can be realized is obtained.

According to the information center of the seventh aspect, it is possible to provide the mobile unit with the digital broadcast area on the route to the destination and its program information without placing a burden on the mobile unit for determining the digital broadcast area. it can.
Therefore, when receiving a digital broadcast in the mobile body, an effect can be obtained that an information center that can reduce the processing burden on the mobile body can be realized.

According to the information center of claim 8, the digital broadcast area on the route to the destination and the program information thereof are transferred to the mobile unit without placing a burden on the mobile unit for determining the digital broadcast area and calculating the route information. Can be provided.
Therefore, when receiving a digital broadcast in the mobile body, an effect can be obtained that an information center that can further reduce the processing burden on the mobile body can be realized.

According to the information center of the ninth aspect, it is possible to minimize the amount of information in communication to the mobile body.
Therefore, communication traffic (traffic) from the information center to the mobile unit is reduced, and the communication time can be shortened. Therefore, power consumption in the information center and the mobile unit can be reduced, and the mobile unit 1 By shortening the communication time per unit, it is possible to improve the response of communication from the information center to each mobile unit.

According to the mobile body of the tenth aspect, digital broadcasting can be continuously received without interruption even when moving between broadcast areas.
Therefore, when receiving a digital broadcast, even if it moves between broadcast areas, the received program is automatically changed without user operation, and a mobile body that can continuously receive the digital broadcast without interruption is provided. The effect that it is realizable is acquired.

According to the mobile unit according to claim 11, the digital broadcasting area information on the route and the program information in the digital broadcasting area are acquired by simply notifying the information center of the destination information and the current location information, Digital broadcasting can be continuously received without interruption even if it moves.
Therefore, when receiving a digital broadcast, the received program is automatically changed and interrupted without user intervention even when moving between broadcast areas without incurring the burden of determining the digital broadcast area. The effect that the mobile body which can receive digital broadcasting continuously without realizing it is realizable.

According to the mobile unit according to claim 12, the digital broadcast area and the received program that change with movement can be appropriately switched by storing the minimum digital broadcast area information and program information in the storage means. Can do.
Accordingly, it is possible to keep the size of the storage means to a minimum, and it is possible to reduce the size of the mobile body or to reduce the proportion of the device portion for receiving digital broadcasts in the mobile body. An effect is obtained.

According to the moving body of the thirteenth aspect, the processing load on the information center and the moving body can be reduced, and the amount of information related to communication from the information center to the moving body can be made the minimum necessary information amount.
Accordingly, communication traffic (traffic) from the information center to the mobile unit and the respective processing burdens can be reduced, and the communication time can be shortened. Therefore, power consumption in the information center and mobile unit can be reduced. In addition, by shortening the communication time per mobile unit, it is possible to improve the response of communication from the information center to each mobile unit.

According to the moving body of the fourteenth aspect, the same program can be continuously received without interruption even when moving between broadcast areas.
Therefore, when a digital broadcast is received, it is possible to realize a mobile body that can continuously receive the same program without interrupting the user's operation automatically even if it moves between broadcast areas. An effect is obtained.

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

(Configuration of mobile device)
First, the configuration of the mobile device 1 used in the mobile digital broadcast receiving system according to an embodiment of the present invention will be described. FIG. 1 is a block diagram showing the configuration of a mobile device 1 used in the mobile digital broadcast receiving system of this embodiment.
In FIG. 1, a mobile device 1 used in the mobile digital broadcast receiving system of the present embodiment is a device mounted on a vehicle such as an automobile, and is received by a digital broadcast antenna 11 mounted on the vehicle. The position of the vehicle (vehicle position) is evaluated by the GPS (Global Positioning System) received wave by the digital broadcast receiver 12 that receives the digital broadcast by the broadcast wave and the GPS antenna 13 mounted on the vehicle, and the target is determined from the current location. An apparatus for performing navigation by calculating route information to the ground, comprising a navigation unit 14 having a function of displaying a traveling state and data accompanying it, and a communication terminal 16 for communicating with the outside by a communication antenna 15. ing.

  On the other hand, the digital broadcast receiver 12 will be described more specifically. The digital broadcast receiver 12 is connected to the digital broadcast antenna 11 and receives a digital broadcast wave. A reception level determination unit 22 for detecting a level, a demultiplexer 23 for separating viewing program information and data broadcast information after demodulation of the digital broadcast wave, and program information (Electronic Program Guide) from the data broadcast information. And a program information acquisition unit 24 to be acquired.

  The digital broadcast receiver 12 also extracts a digital broadcast data generator 25 that demodulates digital broadcast data acquired by external data communication using the communication terminal 16, and extracts program information from the demodulated digital broadcast data. A digital broadcast data storage 26 that stores together with the program information acquired by the program information acquisition unit 24, and an EPG process that processes the output of program information acquired by the program information acquisition unit 24 or program information extracted from the digital broadcast data 27, a channel selector 28 for automatically selecting a channel from the reception level determination result, the vehicle position evaluation result, and the accumulated program information, and the video, audio, and data information selected by the channel selector 28, respectively. A video / audio / data decoder 29 for decoding is provided.

  Further, the digital broadcast receiver 12 superimposes data information such as EPG output from the EPG processor 27 on the video / audio data information combined by the video / audio / data decoder 29, and a display content synthesizer 30. And a digital broadcast display 31 for displaying the composite content output from the display content combiner 30.

  On the other hand, the navigation unit 14 is connected to the GPS antenna 13 and has its own vehicle position rating device 41 that evaluates its own position based on GPS received waves, and route guidance information (route information) based on a destination setting operation by the user. And a communication data transmitter / receiver 43 that generates data to be transmitted in data communication with the outside using the communication terminal 16. The communication data transmitter / receiver 43 receives data in data communication with the outside using the communication terminal 16, and receives the received data as a digital broadcast data generator 25 of the digital broadcast receiver 12 and a route information generator 44 described later. Output to.

The navigation unit 14 also displays a route information generator 44 that generates route display information based on data related to travel information acquired by data communication with the outside using the communication terminal 16, and the generated route display information. And an information display 45.
The communication terminal 16 includes a communication device 51 connected to the communication antenna 15.
Note that the vehicle position evaluation device 41 of the navigation unit 14 may use a gyro data or the like regardless of the GPS received wave as a method of evaluating the vehicle position.

(Information center configuration)
Next, the configuration of the information center 2 used in the mobile digital broadcast receiving system according to an embodiment of the present invention will be described. FIG. 2 is a block diagram showing the configuration of the information center 2 used in the mobile digital broadcast receiving system of this embodiment.
In FIG. 2, the information center 2 used in the mobile digital broadcast receiving system of the present embodiment performs wireless communication with the communication terminal 16 of the mobile device 1 mounted on a vehicle such as an automobile. Corresponds to the route represented by the route information of the vehicle received by the information input unit 101 from the information input unit 101 for receiving the route information of the vehicle and the broadcast area determination unit 102 for determining the digital broadcast area on the route. An arithmetic processing unit 104 that acquires a digital broadcast area and acquires program information in the digital broadcast area from the program information determination unit 103 is provided. The information center 2 includes an information output unit 105 for transmitting information to the communication terminal 16 of the mobile device 1 by wireless communication.

  Specifically, when the vehicle route information is input from the arithmetic processing unit 104, the broadcast area determination unit 102 determines whether the coordinates specified by the input vehicle route information belong to the base station or the relay station. Information relating to a large number of digital broadcast areas classified by the station is extracted from the broadcast area information database 106 stored as coordinates partitioned into the digital broadcast areas, and is output to the arithmetic processing unit 104.

  In addition, when the information on the digital broadcast area determined by the broadcast area determination unit 102 is input via the arithmetic processing unit 104, the program information determination unit 103 receives, for example, the current viewing program by the user and the digital broadcast area. Receiving data, programs that can be viewed by the user and information on receivable data are extracted from the program information database 107 that stores information on programs that can be viewed and data that can be received for each digital broadcasting area. The data is output to the processing unit 104.

  Then, the arithmetic processing unit 104 uses the information on the receivable program and received data in the digital broadcast area determined by the program information determination unit 103 as program information, and information on the digital broadcast area determined by the broadcast area determination unit 102 At the same time, the information is transmitted by wireless communication to the communication terminal 16 of the mobile device 1 via the information output unit 105.

(Program viewing / data reception processing)
Next, program viewing / data reception processing in the mobile device 1 used in the mobile digital broadcast receiving system of the present embodiment will be described. FIG. 3 is a flowchart showing the program viewing / data reception processing operation in the mobile device 1 used in the mobile digital broadcast receiving system of this embodiment.
In FIG. 3, first, when the receiver 21 receives a broadcast wave by the digital broadcast antenna 11 (step S1), the demultiplexer 23 receives the video of the viewing program from the broadcast wave received by the digital broadcast antenna 11. Separate viewing program information such as audio data from data broadcast information such as display data information and program information (step S2).

On the other hand, the program information acquisition unit 24 acquires program information from the data broadcast information and inputs it to the EPG processor 27, and the channel selector 28 displays default video / audio / data information from the input program information. Is selected, and the viewing content synthesizer 30 synthesizes the viewing program and the data information and displays them on the digital broadcast display 31 (step S3).
Here, FIG. 4 shows an example after synthesizing the viewing program displayed on the digital broadcast display 31 and the program information. If the program information cannot be displayed at a time because it is a plurality of channels for several hours from the current time, it may be displayed over two pages.

Thereafter, the channel selector 28 determines whether or not the information display is selected by the user (step S4). If there is an information display selection by the user (YES in step S4), the channel selector 28 selects the channel according to the information display selection by the user. An instruction is given from the selector 28 to the video / audio / data decoder 29, and the viewing program / received data is displayed on the digital broadcast display 31 (step S5).
Then, the digital broadcast data storage 26 stores the current channel information as current channel information D1 (step S6).
If there is no information display selection by the user in step S4 (NO in step S4), the default viewing program / received data is displayed and the current channel information D1 is stored (step S6).

(Digital broadcasting area information and program information acquisition process on the route)
Next, a process for acquiring digital broadcast area information and program information on a route in the mobile device 1 used in the mobile digital broadcast receiving system of this embodiment will be described. FIG. 5 is a flowchart showing digital broadcast area information and program information acquisition processing operations on the route in the mobile device 1 used in the mobile digital broadcast receiving system of this embodiment.
In FIG. 5, first, the vehicle position evaluation device 41 of the navigation unit 14 evaluates the vehicle position based on the GPS data and the gyro data D2, and outputs the vehicle position data D3 (step S11).

Next, it is determined whether or not the destination has been set by the user (step S12). When the destination has been set by the user (YES in step S12), the route guidance calculator 42 determines the optimum for the destination. Route guidance information is calculated (step S13).
On the other hand, the communication data transmitter / receiver 43 generates transmission data including information such as a feature point (for example, a route change point) or a road link based on the route guidance information calculated by the route guidance calculator 42, and performs communication. Data communication with the information center 2 is performed via the communication device 51 of the terminal 16 (step S14).

  FIG. 6 shows an example of transmission data generated by the communication data transmitter / receiver 43. For example, data at feature points with respect to route guidance information such as A (Xa, Ya), B (Xb, Yb), C (Xc, Yc), D (Xd, Yd)... Shown in FIG. When generating the transmission data, it is conceivable that the transmission data is composed of the coordinate points, intersection names, area codes, etc. of all the intersection points. For example, when transmission data is generated by road links such as Link1, LinkA, Link2, LinkB, Link3, etc. shown in FIG. 6B, the transmission data is composed of all road link numbers and branch nodes. It is possible to do.

  Further, the information center 2 calculates route information based on the route guidance information transmitted, further determines digital broadcast area information on the route indicated by the route guidance information, and programs in the digital broadcast area Since the information is generated, the communication data transmitter / receiver 43 performs the data communication with the information center 2 via the communication device 51 of the communication terminal 16 and the digital broadcast area information on the route of the vehicle and the program of the digital broadcast area. Information is received and analyzed as reply data together with route information (step S15).

  Here, FIG. 7 shows an example of data received from the information center 2. For example, in the information center 2, when a plurality of digital broadcast areas such as areas 1, 2, and 3 are set for the route guidance information received from the mobile device 1, the information center 2 The time for entering the area where the areas overlap is estimated, program information for the next digital broadcast area, for example, around 2 hours is generated for that time, and the program information is returned together with the route information. Details of processing on the information center 2 side will be described later.

On the other hand, the communication data transmitter / receiver 43 receives received data received by the communication device 51 of the communication terminal 16 as route information, information on digital broadcast such as digital broadcast area information on the route, and program information in the digital broadcast area, and the like. (Step S16).
Then, the route information is processed by the route information generator 44 of the navigation unit 14 and displayed on the information display 45, and the digital broadcast area information on the route and the information related to the digital broadcast such as the program information of the digital broadcast area. Is input to the digital broadcast data generator 25 in the digital broadcast receiver 12, and the digital broadcast data generator 25 extracts the program information (step S17) and stores the program information D4 in the digital broadcast data storage 26. (Step S18).

In addition, the communication data transmitter / receiver 43 determines whether or not the vehicle travels on a route that is not route guidance (step S19), and if the vehicle is traveling on a route that is not route guidance, the digital data already received is received. If the route guidance is significantly different from the broadcast area information (YES in step S19), the process returns to step S13, and the digital broadcast area information and the program information are updated again by data communication with the information center 2.
In step S19, as long as it does not deviate from the route guidance (NO in step S19), it is left as it is.

When updating digital broadcast area information and program information by data communication with the information center 2, the digital broadcast area information and program information determined again by the information center 2 and the already received digital broadcast area information and program information. The information amount related to communication from the information center 2 to the mobile device 1 can be reduced by updating the difference between the information center 2 and the difference before and after the change of the digital broadcast area information and the program information.
Further, even when the vehicle is traveling on a route that is out of route guidance, there is little difference between the digital broadcast area information and program information determined again by the information center 2 and the already received digital broadcast area information and program information. In this case, the amount of information related to communication from the information center 2 to the mobile device 1 can be further reduced by transmitting / receiving empty packets or transmitting / receiving data indicating no change.

  Further, in step S12, when there is no destination setting by the user even after the vehicle has started moving (NO in step S12), communication is performed as in the example of transmission / reception data in the mobile device 1 shown in FIG. The data transmitter / receiver 43 transmits simple data such as the vehicle position and direction data (traveling direction) from the mobile device 1 to the information center 2 (step S20), and the adjacent broadcast area from the information center 2 to the current broadcast area. In this case, if the program information of the adjacent broadcast area that may travel is returned, the processing from step S15 to step S19 can be executed as in the case of the destination setting by the user.

(Digital broadcasting area information and program information judgment process)
Next, determination processing of digital broadcast area information and program information in the information center 2 used in the mobile digital broadcast receiving system of this embodiment will be described. FIG. 9 is a flowchart showing the determination processing operation of digital broadcast area information and program information in the information center 2 used in the mobile digital broadcast receiving system of the present embodiment.
In FIG. 9, first, the information input unit 101 receives vehicle route guidance information from the communication terminal 16 of the mobile device 1 (step S31).
Next, the arithmetic processing unit 104 acquires the received route guidance information from the information input unit 101, and inputs the route guidance information to the broadcast area determination unit 102 (step S32).

On the other hand, the broadcast area determination unit 102 extracts, from the broadcast area information database 106, digital broadcast area information on the route to which the coordinates specified by the input route guidance information belong, as shown in FIG. ) Areas 1, 2, and 3 are determined and delivered to the arithmetic processing unit 104 (step S33).
On the other hand, the arithmetic processing unit 104 calculates the entry / exit times for the digital broadcast area determined by the broadcast area determination unit 102, and inputs them to the program information determination unit 103 together with the digital broadcast area information (step S34).

Then, the program information determination unit 103 determines whether the time zone includes a certain range for the entry / exit time, for example, a range of 2 hours before and after, based on the input digital broadcast area information and the entry / exit time for the digital broadcast area. The program information of the digital broadcast area to be acquired is acquired from the program information database 107, generated as a list, and delivered to the arithmetic processing unit 104 (step S35). The program information referred to here includes information on receivable data in addition to information on programs that can be viewed in the corresponding digital broadcasting area.
The arithmetic processing unit 104 returns the acquired digital broadcast area information and program information in the digital broadcast area to the communication terminal 16 of the mobile device 1 that has received the route guidance information via the information output unit 105. (Step S36).

(Automatic channel change processing)
Next, automatic channel change processing in the mobile device 1 used in the mobile digital broadcast receiving system of this embodiment will be described. FIG. 10 is a flowchart showing an automatic channel change processing operation in the mobile device 1 used in the mobile digital broadcast receiving system of this embodiment.
In FIG. 10, first, during reception of a digital broadcast program / data broadcast by the receiver 21 (step S41), the reception level determination unit 22 in the digital broadcast receiver 12 changes the reception level as the vehicle moves. Measure and determine the reception level (step S42). Note that the reception level determination by the reception level determination unit 22 may be performed by using a reception voltage / electric field strength at the receiver 21 end or an index of a bit error rate or a packet error rate obtained after demodulation of the reception wave. .

  Further, the channel selector 28 receives the reception level determination result obtained from the reception level determination unit 22, the current channel information D1 stored in the digital broadcast data storage 26, the digital broadcast area information and program information on the above-mentioned route. Received from the information center 2 in step S18 of the acquisition processing operation of the vehicle position data D3 obtained from the vehicle position evaluation device 41 in step S11 and the digital broadcast area information and program information on the route described above. Then, the program information D4 and the like stored in the digital broadcast data storage 26 are collected at any time, and the automatic tuning standby state is set.

In this state, the channel selector 28 determines whether or not a situation in which a failure in reception is likely to occur has been detected (step S43). Specifically, in step S43, if an event occurs such that the reception level output from the reception level determination unit 22 falls below the threshold value or the error rate exceeds the threshold value, a reception failure is likely to occur. It is assumed to be a situation.
If it is detected in step S43 that a failure in reception is likely to occur (YES in step S43), the channel selector 28 is stored in the digital broadcast data accumulator 26 from the vehicle position data D3. The digital broadcast area is selected (step S44).

Then, the program information D4 of the selected digital broadcast area and the current viewing / data reception broadcast program based on the current channel information D1 are collated to determine whether or not there is the same program (step S45).
If, in step S45, the same program as the current viewing / data reception broadcast program exists in the selected digital broadcast area (YES in step S45), the channel selector 28 prepares for switching to the program in the selected digital broadcast area. (Step S46), and compare the electric field strength between the current digital broadcast area and the selected digital broadcast area (step S47).

Next, the channel selector 28 determines whether or not the area change from the current digital broadcast area to the selected digital broadcast area is possible based on the electric field strength (step S48), and if it is determined that it is possible (step S48). YES), the program in the selected digital broadcasting area and the current viewing program are synchronized (step S49), and the channel is switched when the synchronization is achieved (step S50).
Then, the digital broadcast data storage 26 stores the current channel information as current channel information D1 (step S51).
In step S48, when the electric field strength of the selected digital broadcast area is not increased and the area cannot be changed (NO in step S48), the process returns to step S47 and the above-described processing is repeated.

On the other hand, when the same program as the current viewing / data reception broadcast program does not exist in the selected digital broadcast area in step S45 (NO in step S45), the channel selector 28 selects the EPG in order to allow the user to select the program. The program information D4 of the digital broadcast area selected via the processor 27 is combined with the current viewing / data reception broadcast program and displayed on the digital information display 22 (step S52).
Next, the channel selector 28 determines whether or not an information display is selected by the user (step S53). If there is an information display selection by the user (YES in step S53), the process proceeds to step S46 and the above-described processing is performed. repeat.
If no information display is selected by the user in step S53 (NO in step S53), the current viewing / data reception broadcast program is not switched, and the automatic channel change processing operation is terminated.

  In the above-described embodiment, the route guidance information (route information) is calculated in the navigation unit 14 of the mobile device 1. However, as in the example of transmission / reception data in the mobile device 1 shown in FIG. Only simple data such as the vehicle position and direction data (traveling direction) and destination data are transmitted from the device 1 to the information center 2 via the communication terminal 16, and the information center 2 side includes a map information database. An optimal route search may be executed in the arithmetic processing unit 104 of the information center 2 in consideration of a situation such as traffic congestion.

Specifically, when the situation such as traffic jam is taken into account, the traffic information is taken into account by linking the arithmetic processing unit 104 with a database such as a road traffic information communication system to obtain traffic jam information. Route search is possible.
In addition, when the weather condition is acquired by linking a weather information database such as, for example, the Japan Meteorological Association, to the arithmetic processing unit 104, the arithmetic processing unit 104 is configured to connect the current location of the vehicle to the destination. It is also possible to perform a route search taking into account the weather conditions. In addition, the directivity control of the antennas provided in the mobile device 1 can be performed in consideration of the propagation or attenuation of radio waves in the traveling area based on weather conditions.

  Further, as an optimum route search condition on the information center 2 side, a route search result that is most efficient in terms of a link with the digital broadcast area and the viewing status of the current viewing program may be returned. In addition, when performing a route search on the information center 2 side, the digital route area information from the information center 2 to the mobile device 1, along with the calculated route guidance information, and the digital broadcast area information on the route to the destination, and the program in the digital broadcast area By transmitting data to which information is added, automatic channel change processing of digital broadcasting can be executed by the same procedure and operation as the above-described processing.

  As described above, according to the mobile digital broadcast receiving system of the present embodiment, the mobile device 1 calculates the route information of the vehicle on which the mobile device 1 is mounted by the route guidance calculator 42, and the communication data Since the route information is transmitted to the information center 2 via the communication terminal 16 by the transceiver 43, the information center 2 determines the digital broadcast area on the route based on the transmitted route information of the vehicle and the determination. The digital broadcast area information and the program information in the digital broadcast area are transmitted to the mobile device 1 in advance. On the other hand, in the mobile device, the digital broadcast data storage 26 provided in the digital broadcast receiver 12 receives the digital broadcast area information on the vehicle route transmitted from the information center 2 and the program information in the digital broadcast area. By accumulating, the digital broadcast area and the received program that change with the movement can be switched based on the digital broadcast area information received from the information center 2 in advance and the program information in the digital broadcast area.

Therefore, when the mobile device 1 receives a digital broadcast, even if the vehicle moves between broadcast areas, it does not impose a processing burden on the mobile device 1 side, and further without any user operation. Therefore, it is possible to realize a mobile digital broadcast receiving system that can receive a reception program appropriate for the above.
The communication data transmitter / receiver 43 transmits the current location information output from the vehicle position evaluation device 41 to the information center 2 from the mobile device 1 through the communication terminal 16 together with the destination information, and is received by the information center 2 side. The route information of the vehicle on which the mobile device 1 is mounted is calculated from the destination information and the current location information, the digital broadcast area on the route is determined based on the route information, the determined digital broadcast area information, and the If the program information in the digital broadcasting area is configured to be transmitted to the mobile device 1 in advance, the processing load on the mobile device 1 side can be further reduced.

Further, the amount of information related to communication from the information center 2 to the mobile device 1 is obtained by setting the program information acquired from the information center 2 in advance as program information of at least a scheduled time zone when the vehicle passes through each digital broadcasting area. In the mobile device 1, the digital broadcast data storage 26 stores only the minimum digital broadcast area information and program information, and the digital data that changes with the movement is stored in the mobile device 1. The broadcast area and the received program can be switched appropriately.
Therefore, it is possible to keep the size of the storage capacity required for the digital broadcast data accumulator 26 to a minimum, the mobile device can be downsized, or the digital broadcast receiver 12 occupying the mobile device 1. The effect that the ratio of the part of can be reduced is acquired.

Also, when the route to the destination is changed, the digital broadcast receiver 12 updates the information center 2 and the mobile device by updating the difference between the digital broadcast area information and the program information before the route change and after the route change. 1 and the amount of information related to communication from the information center 2 to the mobile device 1 can be made the minimum necessary information amount.
Accordingly, communication traffic (traffic) from the information center 2 to the mobile device 1 and the respective processing burdens can be reduced, and the communication time can be shortened. Therefore, power consumption in the information center 2 and the mobile device 1 can be reduced. As a result, the response time of communication from the information center 2 to each mobile device 1 can be improved by shortening the communication time per mobile device.

  Also, in the digital broadcast receiver 12, for example, when the reception level is determined and a situation in which a reception failure is likely to occur is detected, the channel selector 28 can receive the received program before the reception failure occurs. By changing to a program in the broadcast area, even if the vehicle moves between the broadcast areas, the mobile device 1 can continuously receive the digital broadcast or the same program without interruption. On the other hand, if the same program / data information does not exist in the next broadcast area, inform the user of the situation before the viewing program / received data is interrupted, and continue reception or new reception based on the user's judgment. Switching can be done.

  Accordingly, it is possible to automatically receive an appropriate received program without placing a processing burden on the mobile device 1 side, and without a user's operation, and seamless broadcast viewing / data reception is possible regardless of the broadcast area. The effect of becoming is obtained. In addition, even if the program / data information does not exist in the next broadcast area, it is possible to obtain an effect that broadcast viewing / data reception based on the needs of the user is possible.

It is a block diagram which shows the structure of the mobile apparatus utilized with the mobile digital broadcast receiving system of one Example of this invention. It is a block diagram which shows the structure of the information center utilized with the mobile digital broadcast receiving system of the Example. It is a flowchart which shows the program viewing / data reception processing operation in the mobile device used in the mobile digital broadcast receiving system of the embodiment. It is a figure which shows the example after the synthesis | combination of the viewing program and program information which are displayed on the digital display of a mobile device. It is a flowchart which shows the acquisition processing operation | movement of the digital broadcast area information and program information on a path | route in the mobile apparatus utilized with the mobile digital broadcast receiving system of the Example. It is a figure which shows the example of transmission data produced | generated by the communication data transmitter / receiver of a mobile device. It is a figure which shows the example of reception data from an information center. It is a figure which shows the example of transmission / reception data in a mobile device. It is a flowchart which shows the determination processing operation | movement of the digital broadcast area information and program information in the information center utilized with the mobile digital broadcast receiving system of the Example. It is a flowchart which shows the automatic channel change processing operation in the mobile apparatus utilized with the mobile digital broadcast receiving system of the Example. It is a figure which shows the example of transmission / reception data in a mobile device.

Explanation of symbols

1 Mobile device (mobile)
2 Information Center 12 Digital Broadcasting Receiver 16 Communication Terminal 22 Reception Level Judgment Unit (Reception Quality Judgment Means)
26 Digital broadcasting data storage (storage means)
28 Channel selector (program change means)
41 Own vehicle position evaluation device (position evaluation means)
42 Route guidance calculator (route information calculation means)
43 Communication data transceiver (route information transmission means, position information transmission means, broadcast information reception means)
101 Information input unit (communication means)
102 Broadcast area determination unit (broadcast area determination means)
103 Program information determination unit (program information determination means)
104 Arithmetic processing part (transmission means)
105 Information output unit (communication means)

Claims (14)

A mobile digital broadcast receiving system having a mobile body and an information center,
The moving body is
A communication terminal that communicates with the outside,
Route information calculation means for calculating route information to the destination;
Route information transmitting means for transmitting route information to the destination output by the route information calculating means to the information center via the communication terminal;
Broadcast information receiving means for receiving digital broadcast area information on a route to the destination and program information in the digital broadcast area from the information center via the communication terminal;
A digital broadcast receiver that receives the digital broadcast provided with storage means for storing the digital broadcast area information and the program information;
The information center receives route information of the mobile unit transmitted from the communication terminal, determines a digital broadcast area on the route of the mobile unit based on the route information, and determines the determined digital broadcast area information And a mobile digital broadcast receiving system which transmits program information in the digital broadcast area to the mobile body. A mobile digital broadcast receiving system having a mobile body and an information center,
The moving body is
A communication terminal that communicates with the outside,
A location assessment means to assess the current location;
Location information transmission means for transmitting destination information and current location information output by the location assessment means to the information center via the communication terminal;
Broadcast information receiving means for receiving digital broadcast area information on a route based on the destination information and the current location information, and program information in the digital broadcast area from the information center via the communication terminal;
A digital broadcast receiver that receives the digital broadcast provided with storage means for storing the digital broadcast area information and the program information;
The information center receives the destination information and the current location information of the mobile unit transmitted from the communication terminal, calculates the route information of the mobile unit, and based on the route information, digital information on the route of the mobile unit A mobile digital broadcast receiving system characterized by determining a broadcast area and transmitting the determined digital broadcast area information and program information in the digital broadcast area to the mobile body. 3. The mobile digital broadcast receiving system according to claim 1, wherein at least the program information includes program information of a scheduled time zone in which the mobile body passes through the digital broadcast area. The broadcast information receiving means updates a difference between the digital broadcast area information and the program information before and after the route change when the route to the destination is changed. The mobile digital broadcast receiving system according to claim 3. The digital broadcast receiver is
Reception quality judgment means for judging the reception quality of digital broadcasting;
A program changing means for changing the received program,
When a situation in which a reception failure is likely to occur is detected based on the determination result of the reception quality determination unit, the program change unit is based on the digital broadcast area information stored in the storage unit before the reception failure occurs. 5. The mobile digital broadcast receiving system according to claim 1, wherein the received program is changed to a program in a digital broadcast area where the received program can be received. The program changing means changes the received program to the same program in the receivable digital broadcast area when there is the same program as the received program in the receivable digital broadcast area. The mobile digital broadcast receiving system according to claim 5. A communication means for communicating with a communication terminal installed in a mobile body;
Broadcast area determination means for determining a digital broadcast area on the path of the mobile body based on the path information of the mobile body received via the communication means, and outputting digital broadcast area information;
Program information determining means for acquiring program information of the determined digital broadcast area;
An information center comprising: transmission means for transmitting the digital broadcast area information and program information of the digital broadcast area to the mobile body via the communication means. A communication means for communicating with a communication terminal installed in a mobile body;
Calculating route information of the mobile body from destination information and current location information of the mobile body received via the communication means, and determining a digital broadcast area on the path of the mobile body based on the route information; Broadcast area determination means for outputting digital broadcast area information;
Program information determining means for acquiring program information of the determined digital broadcast area;
An information center comprising: transmission means for transmitting the digital broadcast area information and program information of the digital broadcast area to the mobile body via the communication means. 9. The information center according to claim 7, wherein at least the program information includes program information of a scheduled time zone in which the mobile body passes through the digital broadcasting area. A communication terminal that communicates with the outside,
Route information calculation means for calculating route information to the destination;
Route information transmitting means for transmitting route information to the destination output by the route information calculating means to the information center via the communication terminal;
Broadcast information receiving means for receiving digital broadcast area information on a route to the destination and program information in the digital broadcast area from the information center via the communication terminal;
In a mobile unit comprising: the digital broadcast area information; and a digital broadcast receiver that receives a digital broadcast provided with a storage means for storing the program information.
The digital broadcast receiver is
Reception quality judgment means for judging the reception quality of digital broadcasting;
A program changing means for changing the received program,
When a situation in which a reception failure is likely to occur is detected based on the determination result of the reception quality determination unit, the program change unit is based on the digital broadcast area information stored in the storage unit before the reception failure occurs. A moving body characterized in that a received program is changed to a program in a digital broadcast area that can be received. A communication terminal that communicates with the outside,
A location assessment means to assess the current location;
Location information transmission means for transmitting destination information and current location information output by the location assessment means to the information center via the communication terminal;
Broadcast information receiving means for receiving digital broadcast area information on a route based on the destination information and the current location information, and program information in the digital broadcast area from the information center via the communication terminal;
In a mobile unit comprising: the digital broadcast area information; and a digital broadcast receiver that receives a digital broadcast provided with a storage means for storing the program information.
The digital broadcast receiver is
Reception quality judgment means for judging the reception quality of digital broadcasting;
A program changing means for changing the received program,
When a situation in which a reception failure is likely to occur is detected based on the determination result of the reception quality determination unit, the program change unit is based on the digital broadcast area information stored in the storage unit before the reception failure occurs. A moving body characterized in that a received program is changed to a program in a digital broadcast area that can be received. The mobile object according to claim 10 or 11, wherein at least the program information includes program information of a scheduled time zone that passes through the digital broadcast area. The broadcast information receiving means updates the difference between the digital broadcast area information and the program information before and after the route change when the route to the destination is changed. The moving body according to claim 12. The program changing means changes the received program to the same program in the receivable digital broadcast area when there is the same program as the received program in the receivable digital broadcast area. The moving body according to any one of claims 10 to 13.

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