JP5220296B2 - Broadcast receiver and service list creation method in broadcast receiver - Google Patents

Description

  The present invention relates to a broadcast receiver and a service list creation method in the broadcast receiver, and more particularly, to a broadcast receiver having a function of scanning all receivable channels at a reception point and creating a list of receivable channels. And suitable.

  There is a method of creating a service list (receivable frequency table) representing a list of receivable channels by scanning all music receivable channels at a reception point as channel selection means in the terrestrial digital broadcast receiver. The user can view the program by selecting a desired broadcast service from the service list. This method is widely used as a basic function of a fixed receiver.

  Here, the channel scan automatically determines whether or not each channel can be received while switching the reception frequency from the UHF 13 channel (reception frequency 473 MHz) to the 62 channel (reception frequency 767 MHz) one by one. It is a method of examining. Whether or not reception is possible is determined by measuring a BER value (Bit Error Rate) when the reception frequency of the channel is set. If it can be received, the NIT (Network Information Table) of that channel is acquired and a service list is created. At this time, it is checked whether the same broadcast exists by checking the duplication of the network ID (ID indicating the identification of the broadcasting station) included in the NIT, and if it is duplicated, a channel having a good BER value is selected. Store in the service list. Also, a remote control ID (ID indicating which channel is assigned to the remote control button) included in the NIT is extracted and assigned to the remote control key.

However, in the case of a vehicle-mounted or portable receiver, the radio wave reception state is expected to change frequently, and channels included in the service list at the time of scanning may not be received. In this case, the channel scan must be performed again. However, since the above-described processing must be performed for all the channels from the 13th channel to the 62nd channel, there is a problem that it takes time to update the service list. It was.

  Some broadcast receivers have a seek function in addition to channel scanning. This seek function selects one receivable channel by a user operation, and automatically receives the selected channel. If this seek function is used, the service can be reliably received in a short time. However, since the seek function does not create a service list, there is a problem that the contents of the program cannot be grasped unless it is actually received and viewed.

For such a problem, a plurality of service lists may be provided for each area (for example, by prefecture, country, etc.). In this case, it is checked whether or not broadcast signals can be received for several channels (for example, seven) allocated in advance. If there are more than a predetermined number of channels that cannot be received, another service list is selected. There has been provided a technique designed to do this (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2002-176591

There is also a technique for periodically checking whether or not reception is possible for each channel or for a plurality of channels and updating the service list (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 2005-277797

  However, according to the technique described in Patent Document 1, since it is necessary to provide a plurality of service lists for each area, a large memory capacity is required and the cost is increased. Further, in the technique described in Patent Document 2, it is necessary to scan a channel in order to update the service list. Therefore, while the channel is being scanned, the program being viewed cannot be viewed regardless of the user's intention. Therefore, there is a problem that the user feels uncomfortable.

  The present invention has been made in order to solve such problems. The service list is low-cost, does not cause discomfort to the user, and does not perform channel scanning again even if the reception environment changes. The purpose is to be able to update.

In order to solve the above-described problems, the present invention creates a service list by scanning all receivable channels at a reception point in the list creation unit, and selects one channel that can be received by the seek control unit. When the seek process is received automatically, the list update unit updates the service list according to the channel selection result in the seek control unit.

  According to the present invention configured as described above, since it is not necessary to have a plurality of service lists, a large memory capacity is not required, and costs can be suppressed. In addition, since the service list is updated when a seek is performed with the user's intention to change the channel, the service list can be updated without causing discomfort to the user. Further, since the service list is updated using the result of seek, it is not necessary to update the service list over a long time in order to scan all the receivable channels.

(First embodiment)
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a broadcast receiver 10 according to the first embodiment. As shown in FIG. 1, the broadcast receiver 10 according to the present embodiment includes an antenna 11, a tuner 12, a decoder 13, an audio processing unit 14, an amplifier 15, a speaker 16, a video processing unit 17, a data processing unit 18, and a display control unit. 19, the display part 20, the operation part 21, and the controller 30 are comprised.

  The tuner 12 selectively extracts a broadcast signal having a reception frequency matching the channel selected by the channel selection instruction from the operation unit 21 from the radio wave of the terrestrial digital broadcast received by the antenna 11 and outputs the broadcast signal.

  The decoder 13 separates and demodulates the modulation components of the image data, audio data, and accompanying data from the broadcast signal of the channel selected by the tuner 12, and outputs the resulting audio data to the audio processing unit 14. Data is output to the video processing unit 17 and accompanying data is output to the data processing unit 18. The audio processing unit 14 converts the audio data output from the decoder 13 into an analog audio signal. The analog audio signal is amplified by the amplifier 15 and output from the speaker 16.

  The video processing unit 17 converts the image data output from the decoder 13 into an analog video signal. With this analog video signal, the display control unit 19 displays the program currently being broadcast on the display unit 20. The data processing unit 18 supplies the accompanying data of the currently broadcasted program output from the decoder 13 to the display control unit 19, for example, information such as a broadcasting station name, a song title, and an artist name is displayed at the same time as the audio or video. 20 is displayed. The accompanying data is also supplied to the controller 30 and used when creating a service list to be described later.

  The operation unit 21 receives other operations such as a channel (reception frequency) switching operation and volume operation from the user. The operation unit 21 includes various buttons such as a scan button for performing a channel scan described later and a seek button for performing a seek.

  The controller 30 controls the entire broadcast receiver 10. The controller 30 is constituted by, for example, a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (random-access memory). Various programs for controlling the broadcast receiver 10 are stored in the ROM. The CPU executes various controls while using the RAM as a work memory in accordance with various programs stored in the ROM.

  FIG. 2 is a block diagram illustrating a functional configuration example of the controller 30. As shown in FIG. 2, the controller 30 of the first embodiment includes a list creation unit 31, a temporary storage unit 32, a seek control unit 33, and a list update unit 34 as its functional configuration.

  The list creation unit 31 creates a service list by scanning all receivable channels at the reception point. When execution of channel scanning is instructed by the scan button of the operation unit 21, the list creation unit 31 in the tuner 12 receives the reception frequency from UHF channel 13 (reception frequency 473 MHz) to channel 62 (reception frequency 767 MHz) one by one. While controlling so as to switch, it is automatically checked whether each channel is receivable, and a service list that is a list of receivable channels is created. Whether or not reception is possible is determined by measuring the BER value when the reception frequency of the channel is set, for example, and determining whether or not the BER value is equal to or greater than a predetermined value. Information on the created service list is stored in the temporary storage unit 32. The display control unit 19 displays the service list on the display unit 20 based on the service list information read from the temporary storage unit 32.

  Here, FIG. 3 shows an example of a service list display screen. The service list is created by using the accompanying data of each channel that can be received by the list creation unit 31. For example, as shown in FIG. 3, the channel number 101 (physical channel) of the receivable channel, A logical channel number 102 (indicating which of a plurality of services included in a physical channel is a service), a broadcasting station name 103, and the like are displayed. The list creation unit 31 creates a service list by listing up a plurality of logical channels (for example, television broadcast, radio broadcast, program information, etc.) included in the physical channel, not for each physical channel. Note that the list creation unit 31 can add all of the logical channels to the service list, or can create a service list without adding a part (for example, program information).

  Reference numeral 104 denotes a selection button. By pressing this selection button 104, a desired channel can be selected. Reference numeral 105 denotes a page switching button. When the page switching button 105 is pressed, the page can be switched to the service list of the next page or the previous page that is not currently displayed. Reference numeral 106 denotes a determination button. By pressing the determination button 106, it is possible to instruct reception of the channel selected by the selection button 104. Reference numeral 107 denotes a return button, which can cancel the display of the service list.

Returning to FIG. 2, the seek control unit 33 selects one receivable channel and automatically receives the selected channel. When the seek button is instructed by the seek button of the operation unit 21, whether or not each channel is receivable is automatically checked while controlling the reception frequency to be switched one channel at a time from the channel currently being received. Then, the first detected receivable channel is selected to stop the operation. Whether or not reception is possible is determined, for example, by measuring the BER value when the reception frequency of the channel is set. When a receivable channel is detected, the seek control unit 33 instructs the tuner 12 to receive the channel.

  Here, FIG. 4 is a diagram for explaining an operation example of the seek function. In FIG. 4, an N channel indicated by 201 indicates a channel currently being received. The N channel 201 includes three logical channels (No. 007 to No. 009 in FIG. 4). When the user presses the seek button on the operation unit 21 to select seek up, the seek control unit 33 checks whether or not the tuner 12 can receive signals in order from the N + 1 channel. FIG. 4 shows that N + 2 is selected because N + 1 channel cannot be received. When the seek button is pressed and seek down is selected, it is checked whether the tuner 12 can receive signals in order from the N-1 channel. FIG. 4 shows that the N-2 channel is selected as a result of selecting the N-1 channel and pressing the seek button again to execute the seek down.

  Returning to FIG. 2, the list creation unit 31 updates the service list created by the list creation unit 31 according to the channel selection result in the seek control unit 33. For example, the list update unit 34 compares the channel selection result in the seek control unit 33 with the service list stored in the temporary storage unit 32, and if the channel selected by the seek control unit 33 does not exist in the service list. If it is determined, the channel selected by the seek control unit 33 is added to the service list. When the channel selected by the seek control unit 33 exists in the service list, the list update unit 34 does not update the service list.

  The list updating unit 34 compares the channel selection result in the seek control unit 33 with the service list stored in the temporary storage unit 32, and the channel that could not be selected in the seek control unit 33 is displayed on the service list. If it is determined that the channel is not, the channel that could not be selected is deleted from the service list.

  FIG. 5 is a diagram for explaining an example of updating the service list. In FIG. 5, (a) shows a channel that can be received at a certain point A, and shows that N channel, N + 2 channel, and N + 3 channel can be received. In addition, N-1 channel, N + 1 channel, and N + 4 channel cannot be received. For example, when the user instructs channel scanning at this point A, the list creation unit 31 creates a service list. As a result, the temporary storage unit 32 stores a service list including N channels, N + 2 channels, and N + 3 channels.

  FIG. 5B shows a channel that can be received at another point B moved from the point A. This point B shows that N-1 channel, N channel, N + 1 channel, N + 2 channel, and N + 4 channel can be received. It also indicates that the N + 3 channel cannot be received.

  Here, when the channel currently being received is the N channel, it is assumed that the user presses the seek button of the operation unit 21 to instruct the seek to change the channel. Then, the seek control unit 33 selects and receives a receivable N + 1 channel. At this time, the list update unit 34 compares the service list created at the point A and stored in the temporary storage unit 32 with the N + 1 channel selected by the seek control unit 33. Then, as shown in FIG. 5, since the N + 1 channel does not exist in the service list, the list update unit 34 adds the N + 1 channel to the service list.

  When the user presses the seek button to instruct a seek up, the seek control unit 33 selects and receives a receivable N + 2 channel. At this time, the list update unit 34 compares the service list stored in the temporary storage unit 32 with the N + 2 channel selected by the seek control unit 33. As shown in FIG. 5, since the N + 2 channel is included in the service list, the list update unit 34 does not update the service list.

  Further, when the user presses the seek button and instructs the seek again, the seek control unit 33 selects and receives a receivable N + 4 channel. At this time, since the N + 4 channel selected by the seek control unit 33 with respect to the previously received N + 2 channel is not an adjacent channel, the list update unit 34 cannot select between the N + 2 channel and the N + 4 channel. Recognize that there are N + 3 channels. In this case, the list update unit 34 compares the service list stored in the temporary storage unit 32 with the N + 3 channel. If N + 3 channel exists in the service list, the N + 3 channel cannot be received at the current point B, so the list update unit 34 deletes the N + 3 channel from the service list.

  Furthermore, the list update unit 34 compares the service list stored in the temporary storage unit 32 with the N + 4 channel selected by the seek control unit 33. As shown in FIG. 5, since the N + 4 channel is not included in the service list, the list update unit 34 adds the N + 4 channel to the service list.

  Next, the operation of the broadcast receiver 10 of the first embodiment will be described. FIG. 6 is a flowchart illustrating an operation example of the broadcast receiver 10 according to the first embodiment. In FIG. 6, the seek control unit 33 determines whether or not the seek button of the operation unit 21 has been pressed (step S1). If it is determined that the seek button has not been pressed, the process returns to step S1 and the process is repeated.

  On the other hand, if it is determined that the seek button has been pressed, the seek control unit 33 selects a receivable channel and automatically receives it (step S2). At this time, the list update unit 34 determines whether or not there is a channel that could not be selected between the previously received channel and the channel selected by the seek control unit 33 (step S3). If it is determined that there is no channel that could not be selected, the list update unit 34 determines whether the channel selected by the seek control unit 33 exists in the service list (step S4).

  If it is determined that the channel selected by the seek control unit 23 does not exist in the service list, the list update unit 34 adds the channel to the service list (step S5). On the other hand, if it is determined in step S4 that the channel selected by the seek control unit 33 exists in the service list, the list update unit 34 does not update the service list.

  On the other hand, if it is determined in step S3 that there is a channel that could not be selected, the list update unit 34 determines whether or not the channel that could not be selected exists in the service list (step S6). Here, if a channel that could not be selected is present in the service list, the list update unit 34 deletes the channel from the service list (step S7), and proceeds to step S4. On the other hand, if it is determined in step S6 that the channel that could not be selected does not exist in the service list, the list updating unit 34 proceeds to step S4 without updating the service list.

  As described above in detail, in the first embodiment, the list update unit 34 updates the service list created by the list creation unit 31 according to the channel selection result of the seek control unit 33. There is no need to have multiple service lists, and a large memory capacity is not required. Therefore, the manufacturing cost of the broadcast receiver 10 can be suppressed. In addition, since the service list is updated when a seek is performed with the user's intention to change the channel, the program being watched by the user may be interrupted regardless of his / her intention. The service list can be updated without causing discomfort to the user.

  In addition, when the channel selected by the seek control unit 33 is not on the service list, the list update unit 34 adds the channel to the service list. Therefore, the channel not displayed in the service list in the previous area. However, the service list can be displayed without performing channel scanning again.

  Furthermore, the list updating unit 34 deletes the channel from the service list when the channel that the seek control unit 33 could not select is on the service list. Will be able to display the service list with the channels that can no longer be received deleted.

Note that the display mode of the channel that has been changed by the list update unit 34 updating the service list may be displayed differently from the display mode of other channels. In this case, the list update unit 34 stores the service list in the temporary storage unit 32 so that the changed channel can be identified, and the display control unit 19 reads the service list from the temporary storage unit 32 and displays the screen. When displaying above, the display mode of the changed channel may be displayed differently from the other channels. As a way of changing the display mode, for example, the color is displayed in a different color from the other channels, or the color is reduced. By doing so, it becomes easy to visually understand which channel on the service list has been changed.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings. The configuration of the broadcast receiver 10 according to the second embodiment is the same as that shown in the block diagram of FIG. 1 and will be described using the same reference numerals. FIG. 7 is a block diagram illustrating a functional configuration example of the controller 30. As shown in FIG. 7, the controller 30 of the second embodiment includes a list creation unit 31, a temporary storage unit 32, a seek control unit 33, a list update unit 34, and a remote control unit 35 as its functional configuration. . In addition, about the site | part which has the same function as FIG. 2, the same code | symbol is attached | subjected and demonstrated.

  In the second embodiment, a case where the operation unit 21 is a remote controller (remote controller) will be described. Remote control keys (for example, a scan button, a seek button, a button for selecting a desired channel from a service list, and a reception channel) for a user to perform various operations on the broadcast receiver 10 are assigned to the remote control. Numeric keys).

In FIG. 7, the remote control control unit 35 assigns receivable channels to the numeric keys. Normally, when the list creation unit 31 creates a service list by channel scanning, the remote controller control unit 35 assigns channels to numeric keys. The broadcast signal of each channel is added with a numeric key number (remote control ID) desired by the broadcaster, and the remote control unit 35 assigns each channel to the numeric key of the remote controller using the remote control ID.

Further, the remote control unit 35 receives the operation instruction received by the operation unit 21, and transfers the instruction to the seek control unit 33 or the list creation unit 31. For example, when the seek button of the operation unit 21 is pressed, the remote control unit 35 instructs the seek control unit 33 to execute a seek. When the scan button is pressed, the remote control unit 35 sets the list creation unit. 31 is instructed to execute a channel scan.

Further, when the service list is updated by the list update unit 34, the remote control unit 35 changes the assignment to the numeric keys of the remote control according to the remote control ID of the channel to be updated. For example, a channel that can be newly received by updating the service list is assigned to a numeric key of the remote controller.

  For example, as shown in FIG. 5, when the currently received channel is the N channel and the seek button is pressed by pressing the seek button on the operation unit 21, the N + 1 channel that could not be received at the point A is the point B. In, it is possible to receive. At this time, the list update unit 34 updates the service list. At this time, the remote control control unit 35 assigns the newly received N + 1 channel to the numeric keys of the remote control.

As described above in detail, in the second embodiment, when the list update unit 34 updates the service list by executing a seek, the remote controller control unit 35 sets the channel for the numeric keys of the remote controller in accordance with the update. Therefore, the channel added by the list update unit 34 can be assigned to the numeric keys of the remote controller in a short time without performing another channel scan. Further, it is possible to avoid the inconvenience that the receivable channels on the service list cannot be selected with the numeric keys of the remote controller.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings. The configuration of the broadcast receiver 10 according to the third embodiment is the same as the block diagram shown in FIG. 1 and will be described using the same reference numerals. FIG. 8 is a block diagram illustrating a functional configuration example of the controller 30. As shown in FIG. 8, the controller 30 of the third embodiment includes a list creation unit 31, a temporary storage unit 32, a seek control unit 33, a list update unit 34, and a reception sensitivity determination unit 36 as its functional configuration. Yes. In addition, about the site | part which has the same function, the same code | symbol is attached | subjected and demonstrated.

When the user selects a predetermined channel from the service list displayed on the display unit 20 or the numeric keys on the remote controller of the operation unit 21, the reception sensitivity determination unit 36 receives the reception sensitivity (for example, reception C / C) of the selected channel. N (carrier-to-noise), BER value, etc.) is below a predetermined level. For example, the reception sensitivity determination unit 36 has a reference value of reception sensitivity set in advance, and when the tuner 12 receives a channel selected from the service list, the reception sensitivity is below the reference value. It is determined that it is below a predetermined level. If the reception sensitivity determination unit 36 determines that the reception sensitivity is below a predetermined level, the reception sensitivity determination unit 36 instructs the seek control unit 33 to execute seek.

  The seek control unit 33 according to the third embodiment executes a seek operation according to an instruction from the reception sensitivity determination unit 36 in addition to when the seek button of the operation unit 21 is pressed.

  Next, the operation of the broadcast receiver 10 of the third embodiment will be described. FIG. 9 is a flowchart illustrating an operation example of the broadcast receiver 10 according to the third embodiment. In FIG. 9, the controller 30 determines whether or not a channel has been selected from the service list by the operation unit 21 (step S21). If it cannot be determined that a channel has been selected from the service list, the process proceeds to step S1 in FIG. If it is determined in step S1 that the seek button has not been pressed (NO in step S1), the return destination is step S21.

  On the other hand, if it is determined that a channel has been selected from the service list, the controller 30 instructs the tuner 12 to receive the channel selected by the user. At this time, the reception sensitivity determination unit 36 determines whether or not the reception sensitivity of the channel to be received by the tuner 12 is equal to or lower than a predetermined level (step S22). Here, when it is determined that the reception sensitivity of the channel to be received has reached a predetermined level, the seek operation is not executed and the channel is received.

  On the other hand, when the reception sensitivity determination unit 36 determines that the reception sensitivity of the channel to be received is below a predetermined level, the reception sensitivity determination unit 36 instructs the seek control unit 33 to perform a seek ( Step S23). As a result, the seek control unit 33 executes a seek, and proceeds to step S3 in FIG. Then, the list update unit 34 updates the service list as necessary.

  As described above in detail, in the third embodiment, when a desired channel is selected from the service list or the like, the reception sensitivity determination unit 36 determines that the reception sensitivity of the selected channel is equal to or lower than a predetermined level. Sometimes, the seek control unit 33 automatically performs a seek, so that a receivable channel can be automatically received.

Further, when a channel is selected from the service list or the like, if the reception sensitivity determination unit 36 determines that the reception sensitivity is low, the seek control unit 33 performs a seek, and the list update unit 34 performs a seek according to the result. Update the service list automatically. Therefore, not only when the user wants to change the channel and presses the seek button, but also when trying to change the channel in the service list, if the reception sensitivity is low and the program cannot be received, the service list is updated. Become so. This makes it possible to update the service list without causing discomfort to the user even if the seek button is not pressed, in other words, even if the user is not particularly aware that the reception environment has changed. Become.

  The operation unit 21 may include a preset button in addition to the scan button and the seek button. In this case, the reception sensitivity determination unit 36 determines whether or not the reception sensitivity of the channel assigned to the pressed preset button is below a predetermined level, and when it is determined that the reception sensitivity is below the predetermined level, the seek control unit The seek may be executed at 33.

  At this time, when one channel is selected and the list is updated by executing the seek, the assignment of the channel to the preset button may be changed. Also, when a predetermined channel is selected from the service list and the service list is updated by execution of seek, the channel assignment to the preset button may be changed.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to the drawings. The configuration of the broadcast receiver 10 according to the fourth embodiment is the same as that shown in the block diagram of FIG. 1 and will be described using the same reference numerals. FIG. 10 is a block diagram illustrating a functional configuration example of the controller 30. As shown in FIG. 10, the controller 30 of the fourth embodiment includes a list creation unit 31, a temporary storage unit 32, a seek control unit 33, a list update unit 34, a reception sensitivity determination unit 36, and a notification unit as its functional configuration. 37. In addition, about the site | part which has the same function as FIG. 2 and FIG. 8, the same code | symbol is attached | subjected and demonstrated.

In FIG. 10, the notification unit 37 is a seek control unit when the reception sensitivity determination unit 36 determines that the reception sensitivity of the channel selected from the numeric keys on the remote list of the service list or the operation unit 21 is a predetermined level or less. The guidance which recommends execution of the seek by 33 is alert | reported. For example, the notification unit 37 performs display control so as to display a notification screen on which the message such as “The reception sensitivity of the channel is lower than a predetermined level and cannot be received. Seek is recommended.” Is displayed on the display unit 20. The unit 19 is instructed. When the display control unit 19 displays a notification screen on the display unit 20 and the user who sees the notification screen presses the seek button of the operation unit 21, the seek control unit 33 executes a seek. Then, the list update unit 34 updates the service list as necessary based on the channel selection result in the seek control unit 33.

  As described above in detail, in the fourth embodiment, when a desired channel is selected by the user from the service list or the like, the reception sensitivity determination unit 36 determines that the reception sensitivity of the selected channel is below a predetermined level. When the determination is made, the notification unit 37 controls to display a notification screen that recommends the execution of seeking, so that the user can visually grasp that the selected channel cannot be received. Further, if a seek is executed, a receivable channel can be selected, and the user can be alerted that the service list is also updated.

  Note that the notification unit 37 may notify the execution of seek by voice. In this case, the notification unit 37 may instruct the audio processing unit 14 to notify the speaker 16 of guidance recommending the execution of seek. This makes it possible to alert the user to perform a seek not only visually but also by voice.

  Further, as described in the third embodiment, when the operation unit 21 includes a preset button in addition to the scan button and the seek button, the reception sensitivity of the channel assigned to the preset button by the reception sensitivity determination unit 36 is predetermined. When it is determined that the level is equal to or lower than the level, the notification unit 37 may notify the guidance recommending the execution of the seek.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a diagram illustrating a configuration example of the broadcast receiver 40 according to the fifth embodiment. As shown in FIG. 11, the broadcast receiver 40 according to the fifth embodiment includes an interface unit 41 (hereinafter referred to as I / F 41) and a configuration of the broadcast receiver 10 according to the first embodiment. A reception area storage unit 42 is provided. In addition, about the site | part which has the same function as FIG. 1, the same code | symbol is attached | subjected and demonstrated.

  In FIG. 11, the I / F 41 transmits and receives data to and from the navigation device 43 (including the vehicle position detection unit of the present invention) via the bus 44. For example, the I / F 41 acquires vehicle position information sent from the navigation device 43 through the bus 44. The navigation device 43 has a function of detecting the current position of the vehicle using a self-contained navigation sensor, a GPS receiver, or the like.

  The reception area storage unit 42 stores information on a plurality of reception areas set in the map data as a reception area table. The reception area table is a table in which areas having the same receivable channels are set as one reception area, and the position on the map data corresponds to the reception area.

  FIG. 12 is a block diagram illustrating a functional configuration example of the controller 30. As illustrated in FIG. 12, the controller 30 of the fifth embodiment includes, as its functional configuration, a list creation unit 31, a temporary storage unit 32, a seek control unit 33, a list update unit 34, a notification unit 37, and an area determination unit 38. It has. In addition, about the site | part which has the same function as FIG. 2 and FIG. 10, the same code | symbol is attached | subjected and demonstrated.

  In FIG. 12, the area determination unit 38 starts from a certain reception area based on the vehicle position information sent from the navigation device 43 via the I / F 41 and the reception area table stored in the reception area storage unit 42. It is determined whether or not it has moved to another reception area. For example, information indicating which position on the map the boundary line of the reception area corresponds to as information about the reception area is stored in the reception area storage unit 42. Thus, the area determination unit 38 can determine that the vehicle has moved to another reception area based on whether or not the trajectory of the vehicle position detected by the navigation device 43 has exceeded the boundary line. Each reception area is stored in the reception area storage unit 42 as polygon data with position information, and whether or not the vehicle position detected by the navigation device 43 has moved from one polygon to another polygon is determined. You may make it judge in the area judgment part 38. FIG.

  When the area determination unit 38 determines that the vehicle position has been moved to another reception area, the notification unit 37 according to the fifth embodiment notifies the guidance recommending execution of the seek by the seek control unit 33. As a notification method, for example, as in the fourth embodiment, a notification screen is displayed on the display unit 20, or notification is made from the speaker 16 by voice. Thereafter, when the user presses the seek button of the operation unit 21 to perform seek by the notification of the notification unit 37, the list update unit 34 updates the service list as necessary.

  As described above in detail, in the fifth embodiment, whether the vehicle has moved to another reception area based on the reception area table stored in the reception area storage unit 42 and the vehicle position detected by the navigation device 43. When the area determination unit 38 determines that it has moved to another reception area, the notification unit 37 notifies the guidance recommending execution of the seek. Therefore, the user can know that the channel that can be received has changed without trying to select a channel, and can perform a seek according to his / her preference and update the service list.

  The first to fifth embodiments described above are merely examples of implementation in practicing the present invention, and the technical scope of the present invention is limitedly interpreted by these. It must not be done. In other words, the present invention can be implemented in various forms without departing from the spirit or main features thereof.

For example, the channel selection result in the seek control unit 33 is compared with the service list, and the list update unit 34 determines whether or not there is a channel that can be newly selected or cannot be selected. Then, the seek control unit 33 automatically repeats channel selection of selectable channels until the list update unit 34 determines that there is a channel that can be selected or cannot be selected. You may do it. In this way, at least one channel is necessarily updated in the service list.

It is a figure which shows the structural example of the broadcast receiver by 1st Embodiment. It is a block diagram which shows the function structural example which the controller of 1st Embodiment has. It is a figure which shows the example of a display screen of a service list. It is a figure for demonstrating the operation example of a seek function. It is a figure for demonstrating the update example of a service list. It is a flowchart which shows the operation example of the broadcast receiver of 1st Embodiment. It is a block diagram which shows the function structural example which the controller of 2nd Embodiment has. It is a block diagram which shows the function structural example which the controller of 3rd Embodiment has. It is a flowchart which shows the operation example of the broadcast receiver of 3rd Embodiment. It is a block diagram which shows the function structural example which the controller of 4th Embodiment has. It is a figure which shows the structural example of the broadcast receiver by 5th Embodiment. It is a block diagram which shows the function structural example which the controller of 5th Embodiment has.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,40 Broadcast receiver 12 Tuner 19 Display control part 21 Operation part 30 Controller 31 List preparation part 32 Temporary storage part 33 Seek control part 34 List update part 35 Remote control part 36 Reception sensitivity judgment part 37 Notification part 38 Area judgment part 41 I / F
42 Reception Area Storage Unit 43 Navigation Device

Claims (12)

A list creation unit that scans all receivable channels at the reception point and creates a service list;
While controlling to switch the reception frequency one channel at a time from the channel currently being received, it automatically checks whether each channel is receivable and selects only one receivable channel detected first. A seek control unit that stops operation ;
A broadcast receiver, comprising: a list updating unit that updates the service list according to a channel selection result in the seek control unit.
The list update unit compares the channel selection result in the seek control unit with the service list, and determines that the channel selected by the seek control unit is not in the service list. The broadcast receiver according to claim 1, wherein the channel selected by the seek control unit is added. The list update unit compares the channel selection result in the seek control unit with the service list, and if the channel that could not be selected in the seek control unit is determined to be on the service list, The broadcast receiver according to claim 1, wherein the channel that could not be selected is deleted from the service list. When the service list is displayed on the screen, a display control unit is provided for displaying the channel changed by the list update unit updating the service list in a different display mode from the other channels. The broadcast receiver according to claim 1. A reception sensitivity determination unit that determines whether or not the reception sensitivity of the channel is below a predetermined level when a predetermined channel is selected from the service list;
2. The information processing apparatus according to claim 1, further comprising: a notifying unit for notifying a recommendation to perform a seek by the seek control unit when the receiving sensitivity determining unit determines that the receiving sensitivity of the channel is equal to or lower than a predetermined level. Broadcast receiver described in 1. A reception sensitivity determination unit that determines whether or not the reception sensitivity of the channel is below a predetermined level when a predetermined channel is selected from the service list;
The reception control unit according to claim 1, wherein when the reception sensitivity determination unit determines that the reception sensitivity of the channel is equal to or lower than a predetermined level, the seek control unit starts channel selection of one receivable channel. Broadcast receiver. A reception sensitivity determination unit that determines whether or not the reception sensitivity of the channel assigned to the pressed preset button is equal to or lower than a predetermined level when any of the preset buttons to which a plurality of receivable channels are assigned is pressed; ,
2. The information processing apparatus according to claim 1, further comprising: a notifying unit for notifying a recommendation to perform a seek by the seek control unit when the receiving sensitivity determining unit determines that the receiving sensitivity of the channel is equal to or lower than a predetermined level. Broadcast receiver described in 1. A reception sensitivity determination unit that determines whether or not the reception sensitivity of the channel assigned to the pressed preset button is equal to or lower than a predetermined level when any of the preset buttons to which a plurality of receivable channels are assigned is pressed; ,
The reception control unit according to claim 1, wherein when the reception sensitivity determination unit determines that the reception sensitivity of the channel is equal to or lower than a predetermined level, the seek control unit starts channel selection of one receivable channel. Broadcast receiver. The list update unit compares the channel selection result in the seek control unit with the service list, and the seek is continued until it is determined that there is a channel that can be newly selected or cannot be newly selected. The broadcast receiver according to claim 1, wherein the control unit repeats channel selection of selectable channels. A reception area storage unit that stores information of a plurality of reception areas set in the map data as a reception area table;
A vehicle position detector for detecting the current position of the vehicle;
An area determination unit that determines whether the vehicle position detected by the vehicle position detection unit has moved from one reception area to another reception area using the reception area table of the reception area storage unit;
2. An informing unit for informing a guide for recommending a seek by the seek control unit when the area judging unit judges that the vehicle position has moved to another receiving area. Broadcast receiver described in 1. A remote control unit that assigns receivable channels to remote control keys
The broadcast receiver according to claim 1, wherein when the list update unit updates the service list, the remote control unit changes a channel assignment for the remote control key. The seek control unit of the broadcast receiver automatically checks whether each channel is receivable while controlling the reception frequency to be switched one channel at a time from the channel currently being received. A first step of selecting only one correct channel and stopping the operation ;
A list updating unit of the broadcast receiver includes a second step of updating a service list created by scanning all receivable channels at a certain reception point according to the channel selection result in the first step. A method for creating a service list in a broadcast receiver.