JP5327200B2 - Broadcast receiving apparatus and broadcast information display method - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that receives a digital broadcast broadcast in a very limited area and a broadcast information display method that displays information related to the digital broadcast.

  In Japan, one-segment broadcasting (hereinafter referred to as one-segment broadcasting) was started in April 2006 with mobile terminals such as mobile phones and car navigation devices as the main reception targets. One-segment broadcasting is digital broadcasting, and even mobile terminals can play back higher quality video and audio than conventional analog broadcasting. Since 1Seg broadcasting has different channel settings for each reception area, as with terrestrial digital broadcasting, programs that can be viewed vary depending on the reception area. For example, when a specific program is viewed on a car navigation device mounted on a vehicle, if the reception area changes due to the movement of the vehicle, the program cannot be viewed on at least the same channel.

  Also, since 2009, a demonstration experiment of area one-segment broadcasting (also referred to as area-limited one-segment broadcasting) has started. In area one-segment broadcasting, transmission power smaller than transmission power in normal one-segment broadcasting is used. When transmitted with weak power, the transmission electric field strength is 35 μV / m or less, and the reception range is about 3 m in radius. In the case of transmission with a small power that is larger than the weak power but very small, the reception range is about 100 to 500 m in radius. As described above, the area one-segment broadcasting is a local local broadcasting. Therefore, area one-segment broadcasting is suitable for broadcasting in which a broadcasting area is narrowed down to a specific area such as a store or an event venue, and the broadcasting content related to the location is also suitable. For example, it is conceivable to broadcast information on products sold at the store, an event being held at the event venue, and a video or audio regarding the performer. Moreover, you may perform the data broadcast regarding them.

  Since Area One Seg broadcasting can only be received locally, it cannot be received unless it is in the vicinity of the broadcasting station. Here, consider a case where an area one-segment broadcast is received by a broadcast receiving device (for example, a car navigation device or a mobile phone held by a passenger) present in the vehicle. In area one-segment broadcasting, since the broadcast area is more localized than in normal one-segment broadcasting, the channels that can be received by the broadcast receiving apparatus existing in the vehicle frequently change due to the movement of the vehicle. Therefore, the user in the vehicle needs to frequently set or reselect the channel.

  In particular, in area one-segment broadcasting, the user usually does not have knowledge of what kind of broadcasting is being performed in which region. Therefore, it is difficult to view and confirm the contents of programs broadcast in each area unless channel adjustment is performed and zapping is performed every time the user moves a little. Such work is complicated for the user.

  Since area one seg broadcasting using the above weak power can basically be broadcast without a license, the number of area one seg broadcasting stations may become very large in the future. It becomes even more complicated.

JP 2003-158690 A JP 2009-147458 A

  As described above, since the area that can be received in the area one-segment broadcasting is narrow, even if it is broadcast in the vicinity of the broadcast receiving device, if the broadcast receiving device cannot receive the radio wave, the user cannot pass through the presence of the broadcast. There is a high possibility that

  On the other hand, it is conceivable to register in advance the location information of the area one-segment broadcasting station in the broadcast receiving apparatus. In this case, information regarding all area one-segment broadcasting performed in the vicinity of the broadcast receiving apparatus can be displayed on the screen of the broadcast receiving apparatus. However, when the number is large, it becomes very difficult to see.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for presenting information related to area one-segment broadcasting performed in the vicinity to a user in an easily viewable manner.

  A broadcast receiving apparatus according to an aspect of the present invention is a general-purpose broadcast receiving apparatus, which includes a map data holding unit that holds map data, a broadcast station data holding unit that holds information about a broadcasting station, and a broadcast reception For obtaining the map data of the area including the position detected by the broadcast receiving unit, the position detecting unit for detecting the position of the broadcast receiving device, and the position detected by the position detecting unit from the map data holding unit Acquired from the information related to the broadcasting station that can be received in the area to be acquired from the acquisition unit that acquires information from the broadcast station data holding unit, and the information related to at least one broadcasting station acquired by the acquisition unit Drawing with the extraction unit that extracts information on broadcasting stations existing within a predetermined distance from the position of each landmark included in the map data, and the map data acquired by the acquisition unit Map, a display control unit for displaying on the display unit a map superimposed information on a broadcasting station extracted by the extracting unit, a broadcast receiving apparatus comprising a being.

  Another aspect of the present invention is a broadcast information display method. This method is a broadcast information display method used for a general-purpose broadcast receiving apparatus, a position detecting step for detecting the position of the broadcast receiving apparatus, map data including a position detected by the position detecting step, and Acquired map data from an acquisition step of acquiring information related to a broadcasting station that performs broadcasting that can be received within the area specified by the map data, and information related to at least one broadcast station acquired in the acquisition step The extraction step of extracting information on broadcasting stations existing within a predetermined distance from the position of each landmark included in the broadcast, and the broadcast extracted by the extraction step on the map drawn by the map data acquired by the acquisition step And a display control step of displaying a map on which information related to the station is superimposed on the display unit.

  Note that any combination of the above-described components and a representation of the present invention converted between a method, an apparatus, a system, a recording medium, a computer program, and the like are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the information regarding the area one seg broadcasting currently performed in the vicinity can be shown to a user in an easy-to-see form.

It is a figure which shows the structure of the broadcast receiver which concerns on embodiment of this invention. It is a figure which shows an example of the information display setting screen of area one-segment broadcasting. It is a figure which shows an example of the automatic channel selection setting screen of area one-segment broadcasting. It is a figure which shows the 1st example of the map display screen on which the information of area one-segment broadcasting was superimposed and displayed. It is a figure which shows the 2nd example of the map display screen on which the information of area one-segment broadcasting was superimposed and displayed. It is a figure which shows the 3rd example of the map display screen on which the information of area one-segment broadcasting was superimposed and displayed. It is a figure which shows the 4th example of the map display screen on which the information of area one-segment broadcasting was superimposed and displayed. It is a figure which shows an example of the broadcast station table constructed | assembled by the broadcast station data holding part. It is a figure which shows an example of the landmark table constructed | assembled in a part of map data holding part. It is a figure which shows an example of the method of extracting only what is performed on the left side along the vehicle advancing direction among the area one-segment broadcasting currently performed in arbitrary points. It is a flowchart which shows operation | movement of the broadcast receiver which concerns on embodiment of this invention.

  FIG. 1 is a diagram showing a configuration of a broadcast receiving apparatus 100 according to an embodiment of the present invention. The broadcast receiving apparatus 100 is a portable apparatus that moves along with a moving body. The moving body corresponds to a vehicle (including a four-wheeled vehicle and a two-wheeled vehicle) or a human. In the former case, the broadcast receiver 100 corresponds to an in-vehicle device such as a car navigation device equipped with a one-segment broadcast reception function. In the latter case, the broadcast receiving apparatus 100 corresponds to a mobile device such as a mobile phone or a smartphone equipped with a one-segment broadcast receiving function. Hereinafter, a car navigation apparatus equipped with a one-segment broadcasting reception function will be described as an example. In this embodiment, full-segment broadcasting is ignored.

  The broadcast receiving apparatus 100 includes a broadcast receiving unit 10, a TS decoder 13, an AV decoder 14, a GPS antenna 15, a GPS receiving unit 16, a position detecting unit 17, a system controller 18, a storage unit 22, an operation input unit 25, and a display control unit. 27, a display unit 28, and an audio output unit 29. The broadcast receiving unit 10, TS decoder 13, AV decoder 14, GPS antenna 15, GPS receiving unit 16, position detecting unit 17, storage unit 22, and display control unit 27 are connected to the system bus 30 and connected to the system controller 18. Directly controlled.

  The broadcast receiving unit 10 receives a digital broadcast. In the present embodiment, attention is paid mainly to the function of receiving area one-segment broadcasting. The broadcast receiving unit 10 includes a broadcast antenna 11 and a tuner 12. The broadcast antenna 11 receives broadcast waves and outputs them to the tuner 12. The tuner 12 performs switching of the reception transponder, demodulation of the received signal, error correction, and outputs a transport stream to the TS decoder 13. The TS decoder 13 extracts packets for storing video data and audio data from the transport stream output from the tuner 12. The video data and audio data stored in the packet are, for example, H.264. It is compression-encoded according to standards such as H.264 / AVC and MPEG-2-AAC.

  The AV decoder 14 decompresses and decodes the extracted video data and audio data, and outputs the restored video signal to the display unit 28 and the restored audio signal to the audio output unit 29. The display unit 28 displays video on the screen based on the video signal, and the audio output unit 29 outputs audio based on the audio signal.

  Further, the TS decoder 13 extracts a packet for storing information on a channel and a program from the transport stream output from the tuner 12. Such information is stored in the storage unit 22 under the control of the system controller 18. Note that the packet may include information regarding area one-segment broadcasting in addition to information regarding existing wide-area (for example, prefecture) one-segment broadcasting. For example, information related to area one seg broadcasting in the prefecture may be added to information related to wide area one seg broadcasting in a certain prefecture.

  In addition, information relating to area one-segment broadcasting may be included in the map data and supplied to the broadcast receiving device 100. The map data includes various additional information such as store information in addition to roads and addresses. As one of the additional information, information related to area one-segment broadcasting may be included. In this case, information related to area one-segment broadcasting is also updated with the upgrade of the map data.

  Information related to area one-segment broadcasting is defined for each area one-segment broadcasting station. The information related to the area one seg broadcasting station includes at least position information of the area one seg broadcasting station, a receivable area of the area one seg broadcasting (may be defined by transmission power intensity), and channel information. Furthermore, a program name, an outline of program contents, and the like may be included. The channel information includes a transmission frequency and a channel number. Furthermore, a channel name may be included.

  The storage unit 22 includes a map data holding unit 23 and a broadcast station data holding unit 24. The map data holding unit 23 holds map data. The broadcast station data holding unit 24 holds information regarding the area one-segment broadcasting station. The broadcast station data holding unit 24 holds the position of each area one-segment broadcast station in association with the map data.

  A GPS (Global Positioning System) antenna 15 receives radio waves transmitted from a plurality of GPS satellites (not shown), and outputs them to the GPS receiver 16. The GPS receiver 16 extracts time information included in each radio wave and outputs it to the position detector 17. The position detection unit 17 detects the current position of the broadcast receiving apparatus 100 based on a plurality of time information shifts output from the GPS reception unit 16. This current position is defined by latitude / longitude information.

  The operation input unit 25 includes a receiving unit 26 and receives a user operation. The user operation includes not only a physical key press but also an operation on a touch panel screen formed on the display unit 28. The operation input unit 25 generates an operation signal corresponding to the user operation and outputs it to the system controller 18. The system controller 18 executes processing according to the operation signal. For example, when the setting menu display key is pressed during viewing of general one-segment broadcasting or area one-segment broadcasting, the system controller 18 restores the image signal for displaying the setting menu to the display control unit 27 by the AV decoder 14. To superimpose it on the video signal.

  In the present embodiment, the accepting unit 26 mainly accepts the following information due to a user operation. The reception unit 26 receives an extraction condition when extracting information about the destination of the vehicle and the area one-segment broadcasting station. Although details of this extraction condition will be described later, it can be considered as a display condition regarding the area one-segment broadcasting station displayed on the display unit 28. In addition, the reception unit 26 receives whether or not the channel is automatically selected when the vehicle enters an area one-segment broadcasting receivable area, and the type of landmark displayed on the display unit 28 among the landmarks included in the map data. . The accepting unit 26 outputs the accepted information to the system controller 18.

  The system controller 18 includes an acquisition unit 19, an extraction unit 20, and a route search unit 21 as components related to the present embodiment. These configurations can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and can be realized by a program loaded in the memory in terms of software, but here by their cooperation. Draw functional blocks. Therefore, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The route search unit 21 searches the route from the current position detected by the position detection unit 17 to the destination received by the reception unit 26, and determines the route to the destination. When there are a plurality of routes to the destination, an optimum route is selected based on predetermined setting information. For example, in the setting information, information such as whether to prioritize the distance to the destination or driving time, and information such as whether to use a toll road are set. Further, when selecting a route, traffic jam information, accident information, and the like may be taken into consideration.

  As the detailed algorithm related to the route search and the determination of the optimum route, an existing general algorithm can be used, and thus detailed description thereof is omitted here. When the vehicle deviates from the route determined by the route search unit 21, the route search unit 21 performs route search and determination of the optimum route again.

  The acquisition unit 19 acquires map data of an area including the current position detected by the position detection unit 17 from the map data holding unit 23. In the following description, the map is assumed to be a general plan view viewed from above. Here, the area including the current position of the broadcast receiving apparatus 100 may be an area where the current position of the broadcast receiving apparatus 100 is located at the center, or the vehicle progresses from the current position of the broadcast receiving apparatus 100 as the center. It may be an area that exists at a position shifted in the opposite direction to the direction. That is, the area of the front area of the vehicle may be larger than the area of the rear area.

  Hereinafter, in this specification, the map data of the area including the current position is defined as the map data of the area displayed on the display unit 28. In addition, since the area displayed on the display unit 28 changes every moment according to the progress of the vehicle, the acquisition unit 19 repeatedly acquires new map data that is required while the vehicle is traveling.

  The acquisition unit 19 acquires, from the broadcast station data holding unit 24, information related to the area one seg broadcasting station that is performing area one seg broadcasting that can be received within the area specified by the acquired map data. As described above, the position of the area one seg broadcasting station, the receivable area of the area one seg broadcasting performed by the broadcasting station, and the position of the broadcast receiving device 100 are known, and therefore the acquisition unit 19 is specified by the map data. It is possible to identify an area one seg broadcasting station that is performing area one seg broadcasting that can be received within a certain area.

  The extraction unit 20 narrows down the number of pieces of information regarding the area one seg broadcasting station in order to display the information regarding the plurality of area one seg broadcasting stations acquired by the acquiring unit 19 in a form that is easy to see for the user. The extraction unit 20 executes the narrowing process periodically (for example, once every few seconds) while the vehicle is moving. Alternatively, this narrowing processing is executed every time the vehicle moves a predetermined distance.

  First, the first narrowing method will be described. The extraction unit 20 is equipped with the broadcast receiving apparatus 100 for each area one seg broadcast station that can receive each area one seg broadcast station from the information about the plurality of area one seg broadcast stations acquired by the acquisition unit 19. Information on at least one area one seg broadcasting station is extracted based on the accessibility of the vehicle being operated.

  For example, the extracting unit 20 is an area existing on the left side and / or ahead of the traveling direction of the vehicle on which the broadcast receiving device 100 is mounted, from among the information regarding the plurality of area one-segment broadcasting stations acquired by the acquiring unit 19. Extract information about 1Seg broadcasting stations. In this way, in a country or region where the vehicle is on the left side, it is not necessary to cross the opposite lane, so it can be said that the left side has higher accessibility than the right side with respect to the traveling direction. On the other hand, in a country or region where the vehicle is on the right side, it can be said that the right side of the traveling direction is more accessible than the left side.

  In general, it is easier for the vehicle to move backward as it moves forward, and it can be said that the front in the vehicle traveling direction has higher accessibility than the rear.

  In addition, in the case where the moving body is a human and the human does not have to cross the roadway in a country or region where the right person passes, it can be said that the right side has higher accessibility than the left side with respect to the traveling direction. On the other hand, in a country or region where humans are on the left side, it can be said that the left side is more accessible than the right side in the direction of travel.

  The display control unit 27 superimposes the position information of the vehicle on which the broadcast receiving device 100 detected by the position detection unit 17 is mounted on the map data acquired by the acquisition unit 19, and the area extracted by the extraction unit 20. Information related to the one-segment broadcasting station (for example, the position of the broadcasting station, the receivable area, and the channel number) is superimposed.

  The display unit 28 displays a map drawn by the map data generated by the display control unit 27 on the screen. That is, the display unit 28 displays a map in which the information about the area one-segment broadcasting station extracted by the extraction unit 20 and the current position of the vehicle are superimposed on the map drawn by the map data acquired by the acquisition unit 19. .

  Next, a second narrowing-down method for narrowing down the number of information related to the area one-segment broadcasting station displayed on the display unit 28 will be described. The extraction unit 20 is an area that can be received within a predetermined set distance range on the route determined by the route search unit 21 or on the route from the information regarding the plurality of area one-segment broadcasting stations acquired by the acquisition unit 19. Extract information about the area 1Seg broadcasting station that is conducting 1Seg broadcasting. The set distance range can be arbitrarily set by a designer or a user. Note that an area that is on the route determined by the route search unit 21 or within a predetermined set distance range from the route is relatively easy to access, assuming that the vehicle is operating according to the route. It can be said that it is a high area.

  Next, a third narrowing-down method for narrowing down the number of information related to the area one-segment broadcasting station displayed on the display unit 28 will be described. The extraction unit 20 exists within a predetermined set distance from the position of each landmark included in the map data acquired by the acquisition unit 19 from the information regarding the plurality of area one-segment broadcasting stations acquired by the acquisition unit 19. Extract information for Area One Seg broadcasting stations.

  In this specification, a landmark refers to a facility such as a shopping center, a convenience store, a restaurant, a bank, a gas station, or a parking lot. These are displayed by icons on the map. The landmark is not only effective for the user searching for the target facility, but also effective for confirming the travel route. It is also possible to display only necessary landmarks by selecting the types of landmarks to be displayed on the map.

  In the third narrowing-down method, it is assumed that the types of landmarks and the position information thereof are included in the map data in advance. The subject of Area One Seg broadcasting may be these facilities themselves, or another subject existing in the vicinity thereof. The predetermined set distance can also be arbitrarily set by a designer or a user.

  As a modified example of the third narrowing-down method, the extracting unit 20 has a predetermined set distance from the position of the landmark of the type received by the receiving unit 26 among the landmarks included in the map data acquired by the acquiring unit 19. You may extract the information of the area one seg broadcasting station which exists in the inside.

  Next, additional conditions for narrowing down the number of information related to the area one-segment broadcasting station displayed on the display unit 28 will be described. When the number of pieces of information related to the area one seg broadcasting station acquired by the acquiring unit 19 is less than a predetermined number, the extracting unit 20 passes the information related to all the acquired area one seg broadcasting stations. In other words, the display unit 28 displays information about all acquired area one seg broadcasting stations. This is because when the number of information on the area one-segment broadcasting station displayed on the display unit 28 is small, it is not difficult for the user to see. The number of settings can also be arbitrarily set by the designer or user.

  Note that the extraction unit 20 extracts at least one of the information on the plurality of area one seg broadcasting stations acquired by the acquisition unit 19 according to the extraction condition received by the reception unit 26. The extraction condition is defined by any one or any combination of the first narrowing method to the third narrowing method. It is also defined whether or not to add the additional condition. The user can specify a condition for narrowing down the number of pieces of information related to the area one-segment broadcasting station from the reception unit 26 according to his / her preference. In addition, it is possible to set not to display information regarding the area one-segment broadcasting station.

  The broadcast receiving unit 10 automatically selects a channel of the area one seg broadcasting station when a vehicle equipped with the broadcast receiving device 100 enters a receivable area of the area one seg broadcasting performed by a certain area one seg broadcasting station. be able to. Information regarding whether or not to perform automatic channel selection is also received by the receiving unit 26. If automatic tuning is selected, the system controller 18 instructs the tuner 12 to select the channel.

  FIG. 2 is a diagram illustrating an example of the information display setting screen 281 for area one-segment broadcasting. The setting screen 281 is one of menu setting screens displayed on the display unit 28 when the user operates the operation input unit 25. This setting screen 281 relates to a display method of area one-segment broadcasting.

In FIG. 2, the user can select from six display methods. Hereinafter, the vehicle refers to a vehicle on which the broadcast receiving device 100 is mounted and a user is on the vehicle.
1. Displays all the information of Area One Seg broadcast that is performed around the vehicle.
2. Information on the area one seg on the left is displayed along the vehicle traveling direction.
3. Information on area one seg ahead of the vehicle traveling direction is displayed.
4). Displays information about Area One Seg near the route to the destination.
5. Displays information about Area One Seg near the landmark.
6). Does not display Area One Seg broadcast information.

  The receiving unit 26 receives the display method selected by the user operation and outputs it to the system controller 18. When this selection is not made, one of the settings (for example, 1. or 6.) is reflected as a default setting. 5. Is selected, the receiving unit 26 can further receive the landmark type by a user operation.

  1. Is selected, the display control unit 27 superimposes all the information of the area one seg broadcasting performed around the vehicle position on the map and displays the information on the display unit 28. The area around the vehicle position may be an area displayed on the display unit 28 or an area within a certain range from the vehicle.

  2. Is selected, the display control unit 27 superimposes the information on the area one-segment broadcasting performed on the left side of the road along the traveling direction of the vehicle on the map and displays the information on the display unit 28.

  3. Is selected, the display control unit 27 superimposes the information of the area one-segment broadcasting performed in front of the traveling direction of the vehicle on the map and displays the information on the display unit 28.

  4). If is selected, the display control unit 27 displays all the area one-segment broadcasts along the road from the current position of the vehicle to the destination on the map and displays them on the display unit 28. If the route search by the route search unit 21 is not executed and the road from the current position to the destination is not fixed, this setting becomes invalid. Or 6. The process is performed in the same manner as when is selected.

  5. Is selected, the display control unit 27 displays all the information of the area one-segment broadcasting performed near the landmark displayed superimposed on the map on the map on the display unit 28. When the landmark type is designated, only the information of the area one-segment broadcasting performed near the designated landmark is displayed.

  6). Is selected, the display control unit 27 does not display area one-segment broadcasting information on the display unit 28.

  FIG. 3 is a diagram showing an example of the automatic channel selection setting screen 282 for area one-segment broadcasting. The setting screen 282 is also one of menu setting screens displayed on the display unit 28 when the user operates the operation input unit 25. This setting screen 282 is used to set whether or not to automatically select the area one seg broadcast when the vehicle enters the area where the area one seg broadcast can be received.

In FIG. 3, the user can select from two options.
1. Automatic tuning.
2. No automatic tuning.

  The receiving unit 26 receives the automatic channel selection setting selected by the user operation and outputs it to the system controller 18. If this setting is not made, one of the settings is reflected as a default setting.

  FIG. 4 is a diagram illustrating a first example of the map display screen 283 on which the information of the area one-segment broadcasting is superimposed and displayed. This first example is the above-mentioned display method 2. This is an example when is selected. In the map display screen 283, the vehicle 150 is traveling from the left side to the right side of the screen. The circle drawn with a solid line shows the mark for the Area One Seg broadcasting station. A circle drawn with a dotted line outside the mark indicates a receivable area of area one seg broadcasting performed by the area one seg broadcasting station. In the vicinity of the receivable area, the channel number and / or channel name of the area one-segment broadcasting is described in a superimposed manner. The name of the broadcasting entity, the name of the product or service of the entity, and the like are assigned to the channel name.

  In the first example, information of the area one seg broadcast on the left side is displayed along the vehicle traveling direction. An area drawn with halftone dots corresponds to an area on the left side in the vehicle traveling direction. In FIG. 4, four area one-segment broadcasting (channels CH1 to CH4) is performed in the area.

  FIG. 5 is a diagram illustrating a second example of the map display screen 284 on which the information of the area one-segment broadcasting is displayed in a superimposed manner. This second example is an example of the above display method 3. This is an example when is selected. Also on this map display screen 284, the vehicle 150 travels from the left side to the right side of the screen.

  In the second example, information on area one seg broadcasting ahead in the vehicle traveling direction is displayed. An area drawn with halftone dots corresponds to an area ahead in the vehicle traveling direction. In FIG. 5, three area one-segment broadcasting (channels CH4 to CH6) is performed in the area.

  FIG. 6 is a diagram showing a third example of the map display screen 285 on which the information of the area one-segment broadcasting is displayed superimposed. This third example is the display method described in 4 above. This is an example when is selected. On the map display screen 285, the vehicle 150 is traveling from the current position toward the destination de. A dotted arrow drawn on the road indicates a route to the destination de searched and determined by the route search unit 21.

  In the third example, area one-segment broadcasting information in the vicinity of the route to the destination de is displayed. An area drawn with halftone dots corresponds to an area in the vicinity of the route to the destination de. In FIG. 6, four area one-segment broadcasting (channels CH1, CH4 to CH6) is performed in the area.

  FIG. 7 is a diagram showing a fourth example of the map display screen 286 on which the information of the area one-segment broadcasting is superimposed and displayed. This fourth example is the display method described in 5. This is an example when is selected. Also on this map display screen 286, the vehicle 150 proceeds from the left side to the right side of the screen. Black squares indicate landmarks.

  In the fourth example, information on area one-segment broadcasting performed near the landmark is displayed. In FIG. 7, four landmarks (LA, LB, LH, LI) are drawn on the map. Correspondingly, four area one-segment broadcasting is being carried out. The landmark LA is a broadcasting entity that performs area one-segment broadcasting using the channel CH1. Similarly, the landmark LB is a broadcasting entity that performs area one-segment broadcasting using the channel CH2. A broadcasting entity that performs area one-segment broadcasting using the channel CH4 is located in the vicinity of the landmark LI, but is not the landmark LI. Similarly, a broadcasting subject who performs area one-segment broadcasting using the channel CH7 is located in the vicinity of the landmark LH, but is not the landmark LH.

  As described above, the area one seg broadcasting station may be the same as or different from the landmark. In the former case, it is effective when extracting the area one-segment broadcasting that the user is interested in. The latter case is effective when a landmark is used as a landmark in order to visually confirm the position where the user is interested in the area one-segment broadcasting.

  FIG. 8 shows an example of a broadcast station table 24 a constructed in the broadcast station data holding unit 24. This broadcast station table 24a includes, as items, location information and channel numbers of area one-segment broadcast stations. The position information of the area one-segment broadcasting station is represented by longitude / latitude (xn, yn). Although not shown in FIG. 8, a frequency is assigned to each channel number of the area one-segment broadcasting station. As described above, by managing the location information of the area one seg broadcasting station and the channel number of the area one seg broadcasting station in association with each other, the area one seg broadcasting station and its area are displayed on the map as shown in FIGS. The channel number can be displayed.

  The broadcast station table 24a shown in FIG. 8 is an example of storing minimum information, and may include other items such as channel name, broadcast station name, and radio wave type (weak power broadcast or low power broadcast). Good. 4 to 7, the radio wave types are all assumed to be the same in order to simplify the drawings.

  FIG. 9 shows an example of a landmark table 23 a constructed in a part of the map data holding unit 23. The landmark table 23a includes, as items, a landmark name and landmark position information. Landmark position information is also expressed by longitude and latitude (xn, yn). In this way, by managing the landmark name and the landmark position information in association with each other, the landmark can be displayed as shown in FIG.

  Note that the landmark table 23a shown in FIG. 9 is an example of storing minimum information, and may include other items such as an icon indicating the type of landmark and information indicating whether area one-segment broadcasting is being performed. Good.

  FIG. 10 is a diagram illustrating an example of a method of extracting only the ones that are being performed on the left side in the vehicle traveling direction from the area one-segment broadcasting performed at an arbitrary point. The GPS antenna 15, the GPS receiving unit 16, and the position detecting unit 17 detect the position and traveling direction of a vehicle traveling at an arbitrary point using radio waves from a plurality of GPS satellites.

When the past vehicle position obtained from the radio wave from the GPS satellite is P ″ (x ″, y ″) and the current vehicle position obtained from the radio wave from the GPS satellite is P ′ (x ′, y ′), the vehicle Can be represented by a vector V = (x′−x ″, y′−y ″). When the direction of the vehicle is θ, tan θ = (y′−y) / (x′−x ), The vehicle orientation θ = tan ⁻¹ (y′−y) / (x′−x).

On the other hand, the position of an arbitrary area one-segment broadcasting station in the same coordinate system is A (x1, y1). When the relationship between the direction θ ₁ of the position A of the area one-segment broadcasting station and the direction θ of the current position of the vehicle is 0 ≦ (θ ₁ −θ) ≦ π (= 180 °), the area one-segment broadcasting station It can be determined that it exists on the left side along the direction of travel. On the other hand, if (θ ₁ −θ)> π, it can be determined that it exists on the right side in the traveling direction. In addition, when detecting the position of the area one-segment broadcasting station performed in front of the vehicle traveling direction, the vehicle orientation θ may be considered by rotating it by −π / 2.

Next, a method for extracting only the area one seg broadcasting existing in the vicinity of the route from the current position of the vehicle to the destination from the area one seg broadcasting performed at an arbitrary point will be described. The position of a vehicle traveling on an arbitrary point on the route is detected using radio waves from a plurality of GPS satellites. The position of the vehicle is P (x2, y2), and the position of an arbitrary area one-segment broadcasting station in the same coordinate system is B (x3, y3). If the distance d1 = √ (x2−x3) ² + (y2−y3) ² between the position P of the vehicle and the position B of the area one seg broadcasting station is within a certain value (for example, 100 m), the area one seg broadcasting station To extract. This process is performed at all positions on the route. Actually, the above processing is performed at predetermined distance intervals on the route in consideration of the distance that the radio waves of Area One Seg broadcasting can reach.

Next, a method for extracting only area one seg broadcasting existing in the vicinity of landmarks from area one seg broadcasting performed at an arbitrary point will be described. Assume that the position of an arbitrary landmark is C (x4, y4), and the position of an arbitrary area one-segment broadcasting station in the same coordinate system is D (x5, y5). If the distance d2 = √ (x4−x5) ² + (y4−y5) ² between the position C of the landmark and the position D of the area one seg broadcasting station is within a certain value (for example, 50 m), the area one seg broadcasting station To extract.

  FIG. 11 is a flowchart showing the operation of the broadcast receiving apparatus 100 according to the embodiment of the present invention. The GPS antenna 15, the GPS receiver 16, and the position detector 17 receive radio waves from a plurality of GPS satellites and detect the position of the vehicle (S10). The acquisition unit 19 acquires map data from the map data holding unit 23 based on the position, and a conversion unit (not shown) in the system controller 18 converts the read map data into image data. The display control unit 27 superimposes the position information of the vehicle detected by the position detection unit 17 on the converted image data, and causes the display unit 28 to display a map showing the current vehicle position.

  A determination unit (not shown) in the system controller 18 compares the position of the vehicle one unit past (= the position of the vehicle detected last time) with the current position of the vehicle (= the position of the vehicle detected this time). Then, it is determined whether or not the map displayed on the display unit 28 needs to be updated (S11). When it is determined that the display needs to be updated (Y in S11), the acquisition unit 19 reads the map data from the map data holding unit 23 based on the current vehicle position (S12), and the conversion unit reads the map data. The map data thus converted is converted into image data (S13). The display control unit 27 superimposes the position information of the vehicle detected by the position detection unit 17 on the converted image data, and displays an updated map showing the current vehicle position on the display unit 28 ( S14). When it is determined in step S11 that the display update is unnecessary (N in S11). Steps S12 to S14 are skipped.

  The acquisition unit 19 reads out the information of the area one-segment broadcasting performed in the area specified by the map currently displayed on the display unit 28 from the broadcast station data holding unit 24 (S15). The conversion unit converts information indicating the broadcast station and the receivable area of the read area one-segment broadcast information into image data (S16). Based on one of the display conditions described above, the extraction unit 20 extracts an area one-segment broadcast that matches the display condition from the read area one-segment broadcast (S17).

  The conversion unit synthesizes the image data of the map data and the image data of the area one-segment broadcasting station and the receivable area that match the display conditions (S18). Note that landmark image data is also synthesized if necessary. The display control unit 27 displays the synthesized image on the display unit 28 (S19).

The system controller 18 confirms whether or not there is a receivable area one-segment broadcast from the current vehicle position (S20). For example, it can be confirmed by the following calculation. The current vehicle position is P (x6, y6), and the position of the area one-segment broadcasting station displayed on the screen is E (x7, y7). If the distance d3 = √ (x6−x7) ² + (y6−y7) ² between the current vehicle position P and the position E of the area one seg broadcasting station is within a certain value (for example, 100 m), reception is possible. to decide. This determination of whether or not reception is possible is performed with all Area One Seg broadcast stations displayed on the screen.

  As a result of the confirmation in step S20, if there is a receivable area one-segment broadcast (Y in S20), reception is possible when “1. Select automatically” is selected in the menu setting shown in FIG. A channel for a simple area one-segment broadcasting is automatically selected (S21). When “2. Do not select automatically” is selected, automatic selection is not performed. If there is no receivable area one-segment broadcasting (N in S20), step S21 is skipped.

  When the map display on the display unit 28 is ended by switching the screen to the area one-segment broadcasting program by the above automatic channel selection or by the user operation on the operation input unit 25 (Y in S22), the entire process regarding the map display is ended. . On the other hand, when the map display does not end (N in S22), the process proceeds to step S10, and the processes from step S10 to step S22 are repeated.

  As described above, according to the present embodiment, it is possible to display information related to area one-segment broadcasting performed in the vicinity on the display unit 28 of the broadcast receiving apparatus 100 in a manner that is easy for the user to see. Thereby, when the driver who is driving the vehicle reaches a point where the area one-segment broadcasting is performed, the driver can surely receive the target area one-segment broadcasting without passing through without knowing the existence thereof.

  At that time, by displaying the number of Area One Seg broadcasts in the vicinity limited to Area One Seg Broadcasts in the receivable areas with high accessibility, it is easy to see the information related to Area One Seg Broadcast displayed on the display unit 28. can do. As described above, it is preferable to reduce the number of Area One Seg broadcasts from the viewpoint that it is necessary for a driver driving a traveling vehicle to read information that he / she needs in a short time from the viewpoint of safe driving. .

  For example, area one seg broadcasting that can be received in the area on the left side along the direction of travel of the vehicle is calculated from the position information of the area one seg broadcasting station and the position information of the vehicle, and information related to area one seg broadcasting is limited to the area on the left side May be displayed superimposed on the map. In addition, the information related to the area one-segment broadcasting may be displayed on the map so as to be limited to a region in front of the traveling direction of the vehicle. In addition, information related to area one-segment broadcasting may be displayed superimposed on a map only in the vicinity of the route from the current position of the vehicle to the destination. In addition, information related to area one-segment broadcasting may be superimposed on a map and displayed only in the vicinity of the landmark.

  In addition, when a vehicle enters a reception area of an area one seg broadcast, the user automatically confirms the area one seg broadcast channel by automatically selecting the channel of the area one seg broadcast, and the broadcast receiving apparatus 100 The reception can be ensured.

  In addition, the user can set whether to extract the number of area one-segment broadcasts displayed on the display unit 28 and whether to select the above-described automatic channel selection, and the user reflects his / her preference in the setting. Can be made.

  In this description, the receivable area has been described with a maximum radius of 500 m (during power-saving broadcasting), but the present invention is effective even when the receivable area becomes wider (for example, about several kilometers). In this case, the maximum transmission power of the broadcasting station is about 1 W.

  The present invention has been described based on some embodiments. It is understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are also within the scope of the present invention. By the way.

  DESCRIPTION OF SYMBOLS 100 Broadcast receiving device, 10 Broadcast receiving part, 11 Broadcasting antenna, 12 Tuner, 13 TS decoder, 14 AV decoder, 15 GPS antenna, 16 GPS receiving part, 17 Position detection part, 18 System controller, 19 Acquisition part, 20 Extraction unit, 21 route search unit, 22 storage unit, 23 map data holding unit, 24 broadcast station data holding unit, 25 operation input unit, 26 reception unit, 27 display control unit, 28 display unit, 29 voice output unit, 30 system bus.

Claims (5)

A general-purpose broadcast receiver,
A map data holding unit for holding map data;
A broadcasting station data holding unit that holds information about broadcasting stations;
A broadcast receiver for receiving broadcasts;
A position detector for detecting the position of the broadcast receiver;
The map data of the area including the position detected by the position detection unit is acquired from the map data holding unit, and the information on the broadcast station that is performing broadcast that can be received in the area specified by the map data is An acquisition unit to acquire from the broadcast station data holding unit;
An extraction unit that extracts information on broadcast stations existing within a predetermined distance from the position of each landmark included in the acquired map data from information on at least one broadcast station acquired by the acquisition unit When,
A display control unit for displaying on the display unit a map obtained by superimposing information on the broadcasting station extracted by the extraction unit on the map drawn by the map data acquired by the acquisition unit;
A broadcast receiving apparatus comprising: Of the landmarks included in the map data, further comprising a receiving unit that receives a type of landmark to be displayed on the display unit,
The extraction unit extracts information on broadcast stations existing within a predetermined set distance from the position of the landmark of the type received by the reception unit among the landmarks included in the acquired map data. The broadcast receiving apparatus according to claim 1.   The said extraction part extracts the information regarding all the acquired broadcasting stations, when the number of the information regarding the broadcasting stations acquired by the said acquisition part is less than a predetermined setting number. The broadcast receiving apparatus described. Information about the broadcast station includes broadcast receivable area and channel information,
The broadcast receiving unit selects a channel of the broadcast station when a mobile object associated with the broadcast reception device enters a receivable area of a broadcast performed by a broadcast station. The broadcast receiving apparatus according to any one of 1 to 3. A broadcast information display method used for a general-purpose broadcast receiver,
A position detecting step for detecting a position of the broadcast receiving device;
An acquisition step of acquiring map data including the position detected by the position detection step, and information relating to a broadcasting station that is performing broadcasting that can be received within the area specified by the map data;
Extraction step of extracting information on broadcast stations existing within a predetermined set distance from the position of each landmark included in the acquired map data from information on at least one broadcast station acquired in the acquisition step When,
A display control step for displaying on the display unit a map obtained by superimposing information on the broadcasting station extracted by the extraction step on the map drawn by the map data acquired by the acquisition step;
A broadcast information display method comprising:

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