JP4853230B2 - Broadcast receiver for mobile objects - Google Patents

Description

  The present invention relates to a broadcast receiver for a mobile body that is mounted on a mobile body and receives a broadcast signal.

  2. Description of the Related Art Conventionally, a broadcast receiving apparatus that receives a broadcast signal of a radio or a television is normally receivable by the apparatus (in other words, can be selected) so that a user can easily perform a tuning operation. A memory (so-called preset memory) is provided for storing broadcast signal identification information (specifically, broadcast frequency and broadcast channel) as preset data.

Also, a plurality of preset data generated at different reception points are stored in the preset memory, and when the broadcast receiving apparatus is used, the user selects desired preset data from the plurality of preset data. A device that can be used has also been proposed (see, for example, Patent Document 1).
JP-A-8-330909

  According to this proposed apparatus, preset data of a broadcast signal that can be selected when the broadcast receiving apparatus is used at home, or preset data of a broadcast signal that can be selected when the broadcast receiving apparatus is used outside the home. Since the data can be stored, the user can easily perform the channel selection operation of the broadcast receiving apparatus anywhere by switching between the preset data used at home and the preset data used outside.

  However, since the conventional apparatus and preset data store only the broadcast frequency and broadcast channel necessary for selecting a broadcast signal, the user can find out where the preset data stored in the preset memory is stored. I couldn't know if it was created.

  For this reason, when the broadcast receiving apparatus is for a moving body that is used by being mounted on a moving body such as an automobile, and preset data needs to be switched as the moving body moves, it is conventionally stored in a preset memory. There is a problem that it takes time to select the optimum preset data in the current location from a plurality of preset data, and the usability is poor.

  The present invention has been made in view of these problems, and a plurality of preset data in which identification information of receivable broadcast signals is registered can be stored for each different reception point, and among the plurality of preset data. An object of the present invention is to provide a mobile broadcast receiving apparatus that can easily select optimum preset data in the current location.

  In the mobile broadcast receiving apparatus according to claim 1, which is made to achieve the above object, when a preset data generation command is input from the outside, the preset data generation unit is configured to select a channel selection state by the channel selection unit. By detecting the broadcast signal that can be selected by the channel selection unit by changing the channel selection frequency of the channel selection unit while monitoring the channel, the preset data including the identification information of the detected broadcast signal is generated, and the preset Store in data storage means.

  The preset data storage means is configured to store a plurality of preset data. When the preset data generation means receives a preset data generation command, the preset data generation means represents the current position from the position detection means mounted on the moving body. Position information is acquired, and the acquired position information is assigned to preset data and stored in preset data storage means.

  When a channel selection command is input from the outside, the channel selection control unit sets a broadcast signal to be selected by the channel selection unit based on the channel selection command and the preset data stored in the preset data storage unit. Preset data used by the channel selection control means is set by preset data setting means.

  As described above, in the mobile broadcast receiver of the present invention, a plurality of preset data can be stored in the preset data storage means, but each preset data includes position information of the reception point that generated the preset data. Is granted.

For this reason, when the user selects preset data set by the preset data setting means or edits the preset data stored in the preset data storage means, the data stored in the preset data storage means is stored. It becomes possible to confirm where the preset data is created, and it becomes possible to easily perform the selection work or editing work of the preset data.
In the mobile broadcast receiver of the present invention, when a preset data setting command is input from the outside to the preset data setting means, a plurality of preset data stored in the preset data storage means Preset data display control means for displaying on the display means together with the position information given to.
Then, when one of the preset data displayed on the display means by the preset data display control means is designated from the outside, the preset data setting means sets the designated preset data as preset data used by the channel selection control means. To do.
Therefore, according to the mobile broadcast receiver of the present invention, the user inputs a preset data setting command from the outside via an input means such as an operation switch, whereby a plurality of data stored in the preset data storage means are stored. The preset data is displayed on the display means together with the position information given to each preset data, and the broadcast signal is selected through the channel selection control means while confirming the position information of the displayed preset data. Appropriate preset data can be specified. Therefore, according to the present invention, the user can easily perform an operation when selecting the preset data according to the position of the moving body.

  Also, since the preset data stored in the preset data storage means is given position information, for example, in the preset data setting means, the preset data used by the channel selection control means is changed according to the movement of the moving body. Can be switched automatically.

Next, the time information in the mobile object broadcasting receiver according to claim 2, when the preset data generating means for storing the preset data in the preset data storing means, in addition to position information, indicating the current date and time Is added to the preset data .

Therefore, according to the mobile broadcast receiver of claim 2, the user selects preset data set by the preset data setting means or edits the preset data stored in the preset data storage means. It is possible to confirm when the preset data stored in the preset data storage means has been created. For this reason, it is possible to perform preset data selection work or editing work more efficiently .

In the mobile broadcast receiving apparatus according to claim 2, when a preset data setting command is input from the outside, the preset data display control means displays a plurality of preset data stored in the preset data storage means. , together displayed on the display means the position information and time information assigned to each of these data.

Therefore, according to the mobile object broadcasting receiving apparatus according to claim 2, the user, while confirming the position information and time information of the preset data displayed on the display unit, via the tuning control means Preset data suitable for selecting a broadcast signal can be designated .

Next, in the mobile broadcast receiving apparatus according to claim 3 , if the automatic switching of the preset data is set as the operation mode of the apparatus, the preset data search means stores the preset data at every predetermined time. The preset data whose position information is closest to the current position of the moving body is searched from the preset data stored in the means.

Then, the preset data setting means sets the preset data searched by the preset data search means as preset data used by the channel selection control means.
Therefore, according to the mobile broadcast receiving apparatus of the third aspect , if the automatic switching of the preset data is set as the operation mode of the apparatus, the preset data used by the channel selection control means is moved. The preset data suitable for the position of the body is automatically switched, and the user can always perform the channel selection operation using the preset data suitable for the position of the moving body without switching the preset data. Will be able to do.

  By the way, the frequency of a broadcast radio wave transmitted from a broadcast station may be changed as the number of broadcast signals distributed in the same region increases or decreases. If the frequency of the broadcast signal is changed in this way, the preset data stored in the preset data storage means cannot select a broadcast signal from a desired broadcast station.

  For this reason, when the frequency of the broadcast radio wave transmitted from the broadcast station is changed, the user moves the mobile body to the area and inputs a preset data generation command to the preset data generation means. Therefore, it is necessary to generate preset data suitable for the area again.

  However, such a preset data update operation is troublesome for the user, and if the user does not know that the frequency of the broadcast radio wave has been changed, the preset data update operation is not performed. May be delayed.

Therefore, the mobile broadcast receiver of the present invention (Claims 1 to 3 ) is further provided with broadcast frequency change information acquisition means and preset data update means as described in Claim 4 to change the broadcast frequency. The information acquisition means acquires broadcast frequency change information representing a change in frequency of the broadcast radio wave transmitted from the broadcast station, and the preset data storage means is stored in the preset data storage means based on the acquired broadcast frequency change information. The preset data may be updated automatically.

  In this way, the preset data stored in the preset data storage means is automatically updated to the latest one, and the user moves the moving body to update the preset data. Therefore, the usability of the device can be further improved.

  Next, among mobile broadcast receivers, a receiver that receives a broadcast signal (digital TV broadcast signal) from a broadcast station (ground station) that performs digital TV broadcast is a receiver that receives radio broadcast or analog TV broadcast. Compared to the apparatus, it takes time to detect a broadcast signal that can be selected by the channel selection means.

For this reason, as described in claim 5 , the present invention is applied to a mobile broadcast receiving apparatus that receives a digital television broadcast, and preset data is stored for each region where receivable broadcast signals are different. If the preset data is switched in accordance with the movement of the moving body, the effect can be further exhibited.

  Note that it takes time to detect a selectable broadcast signal in a receiver for digital television broadcast. In digital television broadcast, the broadcast signal is OFDM-modulated, and as in analog television broadcast, it is selected. This is because it cannot be determined whether the broadcast signal can be received (tuned) from the signal level of the video carrier included in the broadcast signal.

  In other words, in digital television broadcasting, in order to detect a receivable channel, the original data (transport stream: TS) must be demodulated from the broadcast signal selected by the channel selection means, and the detection takes time. That's it.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an in-vehicle multimedia system to which the present invention is applied.

  As shown in FIG. 1, the in-vehicle multimedia system according to the present embodiment is mounted on a vehicle (automobile), and is used to output driving guidance based on images and sounds, and to output images and sounds from various multimedia devices. A car navigation unit 20 for controlling driving guidance and audio output; a multimedia device control unit 30 for controlling various multimedia devices; a digital television receiving unit 40 for receiving digital terrestrial television broadcasting; And a system control unit 50 that controls 20, 30, and 40.

  The system control unit 50 includes an operation switch group 2 for a user to input various commands, a display 4 for displaying an image for driving guidance, a television broadcast image, and the like, and a speaker 6 for outputting sound. A vehicle information detection unit 8 that detects various vehicle states such as vehicle speed pulses and brake information and inputs the information (vehicle information) to the system control unit 50 is connected.

  The display screen of the display 4 is provided with a touch panel, and the user can input various commands to the system control unit 50 by operating the touch panel.

  Here, the car navigation unit 20 is a map information storage in which the own vehicle position detection unit 22 as a position detection unit including a GPS receiver and the like, a hard disk or the like, and map data, voice data for route guidance, and the like are recorded in advance. A unit 24 and a car navigation control unit 26 connected to each unit are provided.

  The car navigation control unit 26 is mainly configured by a microcomputer including a CPU, a ROM, a RAM, and the like, and a video signal and an audio signal for driving guidance based on map data and audio data stored in the map information storage unit 24. Is generated and output to the system control unit 50 to display an image for driving guidance on the display 4 via the system control unit 50, and sound for driving guidance is output from the speaker 6 as necessary. .

  Further, when the vehicle control information is requested from the system control unit 50, the car navigation control unit 26 outputs position information indicating the current position of the vehicle detected by the own vehicle position detection unit 22 to the system control unit 50. To do.

  Next, the multimedia device control unit 30 controls various multimedia devices such as a CD drive, an MD drive, a DVD drive,..., And receives data including audio and video from a recording medium such as a CD, MD, or DVD. This is for reading out, and is mainly composed of a microcomputer comprising a CPU, ROM, RAM and the like.

  The multimedia device control unit 30 converts the data read from the recording medium such as a CD, MD, or DVD into an audio signal for audio output or a video signal for display, and outputs the audio signal to the system control unit 50. Then, the video is displayed on the display 4 via the system control unit 50 and the sound is output from the speaker 6.

  Next, the digital television receiver 40 receives a broadcast wave of terrestrial digital television broadcast via an antenna 41 mounted on the vehicle, and a digital television broadcast signal of a predetermined broadcast channel (hereinafter simply broadcast) from the received signal. And a video signal and an audio signal are demodulated, and a tuner unit 42, a TS demodulation unit 44, a video / audio output circuit 45, a memory unit 46, a digital television reception control unit 48, etc. It is composed of

  The tuner unit 42 converts the broadcast signal of the selected channel designated by the digital television reception control unit 48 into a predetermined intermediate frequency signal. The tuner unit 42 converts the broadcast signal (intermediate frequency). Frequency signal) is input to the TS demodulator 44.

  The broadcast signal (intermediate frequency signal) is OFDM demodulated by the TS demodulator 44, so that the original data (transport stream: TS) before the broadcast signal is generated (OFDM modulation) on the broadcast station side. And further separated into MPEG data including video / audio and attached data such as program information.

  Then, the separated MPEG data is input to the video / audio output circuit 45 and decoded, thereby being converted into a video signal and an audio signal and output to the system control unit 50. In addition, attached data such as program information is input to the digital television reception control unit 48.

  The digital television reception control unit 48 is configured mainly with a microcomputer including a CPU, a ROM, a RAM, and the like. When a channel selection command is received from the system control unit 50, the digital television reception control unit 48 selects from preset data stored in the memory unit 46. A channel selection control process for selecting a broadcast channel to be selected and controlling a channel selection channel of the tuner unit 42, or an attached data input from the TS demodulator unit 44, and a video / audio output circuit 45 or a memory unit Receive data processing to be sent to 46 is executed.

  The memory unit 46 is composed of a nonvolatile memory such as an EEPROM, and is a program for operating the digital television reception control unit 48, user information, font data for displaying various information on the display 4, and a TS demodulation unit. Program guide information obtained from attached data input from 44, preset data used to control the channel selection of the tuner unit 42, and the like are stored. The digital television reception control unit 48 acquires information stored in the memory unit 46 as necessary, and transmits the information to the system control unit 50 and the video / audio output circuit 45.

  Next, the system control unit 50 operates each of the units 20, 30, and 40 in accordance with a command input from the operation switch group 2 or the touch panel of the display 4, and images and video input from the units 20, 30, 40. Based on the audio signal, an image is displayed on the display 4 and an audio is output from the speaker 6, and is configured mainly with a microcomputer including a CPU, a ROM, a RAM, and the like.

  The system control unit 50 acquires vehicle information from the vehicle information detection unit 8 and inputs the vehicle information to the car navigation unit 20 in accordance with a request from the car navigation unit 20 or the digital television reception unit 40, and the position from the car navigation unit 20. The relay processing of various information that acquires information and inputs it to the digital television receiver 40 is also executed.

  In the multimedia system 10 of the present embodiment configured as described above, the digital television receiver 40 corresponds to the mobile broadcast receiver of the present invention, and the tuner unit 42 in the digital television receiver 40 is the present invention. The channel selection means, the memory unit 46 functions as the preset data storage unit of the present invention, and the digital television reception control unit 48 functions as the channel selection control unit of the present invention.

  The digital television reception control unit 48 can receive the digital television reception unit 40 (in other words, the tuner unit 42 selects the channel) separately from the channel selection control process and the reception data processing as the channel selection control unit. Channel scan processing for searching for a broadcast signal and storing the broadcast channel, which is identification information of the searched broadcast signal, as preset data in the memory unit 46, or among a plurality of preset data stored in the memory unit 46 Preset data setting processing and preset data switching processing for setting preset data used for channel selection control processing, or acquiring repacking information of a broadcast channel from the attached data input from the TS demodulator 44 and memory Preset data automatic update processing for updating preset data stored in the unit 46 is also executed. That.

Hereinafter, each of these processes will be described.
FIG. 2 is a flowchart showing channel scan processing executed in the digital television reception control unit 48.

  In this channel scanning process, when a user operates the operation switch group 2 or the touch panel of the display 4, a search command (in other words, a command for generating preset data) for searching for a currently receivable broadcast channel is input. This processing is executed when a search command (preset data generation command) is input from the system control unit 50 to the digital television reception control unit 48, and corresponds to preset data generation means of the present invention.

  When the channel scanning process is started, first, in S110 (S represents a step), a preset initial value (in this embodiment, digital terrestrial television broadcasting) is selected as the channel selection channel of the tuner unit 42. The lowest channel (for example, CH13) of all allocated broadcast channels (for example, CH13 to CH62: CH represents a channel) is set, and the broadcast signal of the initial value broadcast channel (for example, CH13) is set in the tuner unit 42. Tune in.

  Next, in S120, the demodulated data is acquired from the TS demodulator 44, and in S130, it is determined whether the demodulated data can be acquired from the TS demodulator 44. It is determined whether or not is selected.

  If it is determined in S130 that the demodulated data can be acquired from the TS demodulator 44 (that is, if the tuner unit 42 can select a broadcast signal of the current channel selection channel), the process proceeds to S140. Then, the current channel selection channel is selected as a receivable channel, and channel information (broadcast station name, etc.) regarding the channel selection channel is acquired from the demodulated data acquired from the TS demodulator 44, and then the process proceeds to S150.

  If it is determined in S130 that the demodulated data cannot be acquired from the TS demodulator 44 (that is, if the tuner channel 42 cannot select the broadcast signal of the current channel selection channel), the process directly proceeds to S150. To do.

  Next, in S150, it is determined whether the determination process in S120 and S130 has been performed for all broadcast channels of digital terrestrial television broadcasting. If the determination process has not been performed for all broadcast channels, In S160, the channel selection channel of the tuner unit 42 is changed by adding a value of 1 to the channel selection channel, and the processing after S120 is executed again.

  On the other hand, if it is determined in S150 that the determination processes of S120 and S130 have been performed for all the broadcast channels of the digital terrestrial television broadcast, the process proceeds to S170 and the car navigation unit 20 via the system control unit 50 is performed. By requesting the vehicle position information from the car navigation unit 20, the vehicle position information detected by the own vehicle position detection unit 22 is acquired, and the process proceeds to S180.

In S180, date information representing the current date and time managed by the system control unit 50 is acquired from the system control unit 50.
When the date / time information is acquired in S180, the process proceeds to S190, and all channel selection channels selected as receivable channels in S140 and channel information indicating the broadcast station names and the like are set as preset data in S170 and S180. Together with the position information and date / time information acquired in step S4, the information is stored in the memory unit 46, and the channel scan process is terminated.

  The memory unit 46 can store a large number (for example, 10) of preset data. In S190, the preset data generated as described above is stored in the preset data storage area of the memory unit 46. To do.

  In S190, when the preset data is stored, if the storage area of the preset data in the memory unit 46 is full, the fact is displayed on the display 4 and stored in the memory unit 46 to the user. Unnecessary preset data is deleted from a large number of preset data, and newly generated preset data is stored in a storage area freed by the deletion.

Next, FIG. 3 is a flowchart showing preset data setting processing executed in the digital television reception control unit 48.
In this preset data setting process, a user operates the operation switch group 2 or the touch panel of the display 4 to input a preset data setting command used when selecting a broadcast signal, and the setting command is sent to the system control unit 50. Is input to the digital television reception control unit 48 and corresponds to the preset data setting means of the present invention.

  When the preset data setting process is started, first, all preset data stored in the memory unit 46 are read in S210, and in the subsequent S220, display conditions for displaying the preset data as a list are set in the memory unit 46. Read from.

  In this embodiment, the preset data stored in the memory unit 46 is displayed in the registration order as the display condition of the preset data, or the distance between the current location of the vehicle and the preset data registration location is short (distance order). In step S220, the currently set display condition is read from the memory unit 46.

  In subsequent S230, it is determined whether the display condition of the preset data read in S220 is the registration order or the distance order. If the display condition is the registration order, all the preset data read in S210 in S240. If the display conditions are in the order of distance, on the other hand, if the display conditions are in the order of distance, in S250, all the preset data read in S210 is the closest to the current location. Display data to be displayed in order from the one is generated.

  Next, in S260, the display data generated in S240 or S250 is output to the system control unit 50, so that the preset data is displayed on the display 4 as a list on the display condition via the system control unit 50.

  As shown in FIG. 4, this list of preset data is registered with each preset data stored in the memory unit 46 together with position information and date information (address and date in the figure) attached to the data. For preset data that is displayed in order (or distance order) as “Preset 1”, “Preset 2”,... And cannot be displayed on one screen, the display screen is scrolled in accordance with an instruction from the user in the process of S260. It can be displayed.

  This display screen also displays two icons ("sort by time" and "sort by distance from the current location") for specifying preset data display conditions. Select this icon. Thus, the display conditions can be changed.

  Next, when preset data is displayed as a list in S260, this time, the process proceeds to S270, where the user operates the operation switch group 2 or the touch panel of the display 4 to display different from the current display conditions. It is determined whether or not a display condition change command has been input by determining whether or not a condition icon has been selected.

  If it is determined in S270 that the display condition change command has been input, the display condition stored in the memory unit 46 is changed, and the process proceeds to S230. Conversely, the display condition change command is not input. If it is determined, the process proceeds to S280.

  Next, in S280, the user operates the operation switch group 2 or the touch panel of the display 4 to determine whether one of preset data currently displayed is designated as preset data for channel selection. .

  When it is determined in S280 that the user has designated the preset data for channel selection, the process proceeds to S290, and the designated preset data is stored in the memory unit 46 as the preset data for channel selection used for channel selection control. After the storage, the process is terminated. Conversely, when it is determined in S280 that the user has not designated the preset data for channel selection, the process proceeds to S260 again.

  The preset data stored in the memory unit 46 as the preset data for channel selection is input with a channel selection command from the system control unit 50, and the tuner unit according to the channel selection command in the channel selection control process described above. It is used to specify the broadcast channel when changing the 42 channel selection channels.

And in this embodiment, a series of processing of S230-S260 mentioned above is equivalent to the preset data display control means of the present invention.
Next, FIG. 5 is a flowchart showing a preset data switching process executed in the digital television reception control unit 48.

  This preset data switching process is performed when the user operates the operation switch group 2 or the touch panel of the display 4 and the preset data automatic switching mode is set as the operation mode of the digital television receiver 40. This is a process periodically executed as one of main routines in the digital television reception control unit 48.

  The preset data switching process is a process for automatically switching the tuning preset data to the optimum preset data, and is executed when the tuning preset data is manually set. Similar to the data setting process, it corresponds to the preset data setting means of the present invention.

  As shown in FIG. 5, in the preset data switching process, first, in S310, it is determined whether or not the set time has elapsed since the previous execution of the process. If the processing is completed and the set time has elapsed, the process proceeds to S320, and the vehicle navigation unit 20 requests the vehicle navigation unit 20 for vehicle position information via the system control unit 50. The vehicle position information detected by the position detector 22 is acquired.

  Next, in S330, from the preset data stored in the memory unit 46 based on the current vehicle position information acquired in S320 and the position information given to each preset data stored in the memory unit 46. Then, processing as preset data search means for searching for preset data generated (registered) at a position closest to the current location is executed.

  In subsequent S340, it is determined whether the preset data searched in S330 has already been used as tuning preset data, and the preset data searched in S330 has already been used as tuning preset data. If the preset data searched in S330 is not used as the preset data for tuning, the process proceeds to S350.

  In S350, the preset data for channel selection is changed to the preset data searched in S330, and in S360, a display message and a notification sound indicating that are output to the system control unit 50, whereby the system control unit 50 is Then, the change of the preset data for tuning is displayed on the display 4 and a notification sound indicating the fact is output from the speaker 6 to notify the user to that effect, and the process ends.

Next, FIG. 6 is a flowchart showing preset data automatic update processing executed in the digital television reception control unit 48.
This preset data automatic update process is performed when the television display on the display 4 based on the data received by the digital television receiver 40 is stopped (that is, when the user is not using the digital television receiver 40). This is a process periodically executed as one of main routines in the digital television reception control unit 48.

  When the preset data automatic update process is started, the received data is acquired from the TS demodulator 44 in S410. In S420, it is determined whether or not the received data includes repacking information. to decide.

  That is, in terrestrial digital television broadcasting, the broadcast channel of the broadcast station (in other words, the broadcast frequency) may be changed, and at the time of the change, repacking information indicating the change of the broadcast channel in the broadcast signal transmitted from the broadcast station. Therefore, in S410 and S420, the TS demodulation unit 44 determines whether or not the attached data including the repacking information has been demodulated. Note that the processing of S410 and S420 corresponds to the broadcast frequency change information acquisition means of the present invention.

  If it is determined in S420 that the received data includes repacking information, the preset data currently stored in the memory unit 46 is already based on the latest repacking information in S430. It is determined whether or not the preset data has been updated. If the preset data has not yet been updated, the process proceeds to S440.

  In S440, based on the repacking information included in the received data acquired in S410, the preset data corresponding to the repacking information (that is, including the broadcasting station whose broadcasting channel has been changed) is updated. The process as the data updating means is executed, and the preset data automatic updating process is terminated.

  If it is determined in S420 that the repacking information is not included in the received data, or if it is determined in S430 that the preset data has already been updated based on the latest repacking information. Then, the preset data automatic update process is terminated as it is.

  As described above, in the in-vehicle multimedia system of the present embodiment, when a user inputs a preset data generation command via the operation switch group 2 or the touch panel of the display 4, the digital television reception control unit 48 By executing the scanning process, the broadcast channel of the broadcast signal that can be received (tuned) at the current position of the vehicle is searched, each searched broadcast channel is generated as preset data, and the current location is added to the generated preset data. The position information to be represented and date / time information representing the current date and time are assigned and stored in the memory unit 46.

  In addition, a plurality of preset data generated each time the channel scan process is executed can be registered in the memory unit 46, and the user can manually select preset data used for channel selection control from the plurality of preset data. You can choose.

  When the user selects preset data to be used for channel selection control from among a plurality of preset data in this way, the preset data setting process is executed to store the preset data in the display 4 in the memory unit 46. A list of all the preset data is displayed together with position information and date / time information (in FIG. 4, the date of the date / time information).

  For this reason, the user checks on the display screen of the display 4 the location (registration location) and date / time at which each preset data stored in the memory unit 46 is generated, and preset data suitable for the current location of the vehicle. Can be selected, and the selection operation can be performed easily and appropriately.

  In addition, the preset data stored in the memory unit 46 can be edited, such as deleting and changing, if necessary. The contents of the preset data can also be displayed by displaying a list of preset data. Since it can be confirmed, editing can be performed easily.

  Furthermore, in this embodiment, when displaying a list of preset data, the display conditions can be changed in order of registration or distance, so that the user can select desired preset data from the display screen of the list. It will be easier to find.

  On the other hand, in the present embodiment, if the automatic switching mode of preset data is set as the operation mode of the digital television receiving unit 40, the preset data switching process is periodically executed and the preset data stored in the memory unit 46 is stored. Preset data whose registered location is closest to the current location is retrieved from the data, and the retrieved preset data is set as tuning preset data used for tuning control.

  Therefore, according to the present embodiment, for example, as shown in FIG. 7, when the commuting route from home to the company spans the service areas of two broadcast towers A and B that transmit broadcast radio waves, If the channel scanning process is executed at points A and B close to the broadcasting towers A and B, and preset data representing broadcast channels that can be received at each point is stored in the memory unit 46, then the user can When passing the commuting route, depending on the vehicle position, the preset data for tuning is either preset data corresponding to the transmission radio wave from the broadcast tower A or preset data corresponding to the transmission radio wave from the broadcast tower B. It will be switched automatically.

  That is, according to the present embodiment, if the preset data automatic switching mode is set as the operation mode of the digital television receiver 40, the user can always move the mobile object without performing the preset data switching operation. The channel selection operation can be performed by using preset data suitable for the position, and the usability of the digital television receiver 40 can be further improved.

  Next, when the digital television receiving unit 40 of the present embodiment stops the television display on the display 4, the reception data demodulated by the TS demodulating unit 44 by executing preset data automatic update processing. The repacking information is extracted from the data, and the preset data whose broadcast channel (broadcast frequency) is changed among the preset data stored in the memory unit 46 is updated based on the extracted repacking information. Has been.

  For this reason, when a digital TV broadcast channel is repacked, the user does not need to move the moving body to an area where the repacked broadcast wave can be received and newly generate preset data. The preset data stored in the memory unit 46 can be managed very easily.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, a various aspect can be taken.
For example, in the above embodiment, the digital television receiver 40 as a vehicle broadcast receiving device has been described as being configured as a part of the multimedia system 10 mounted on a vehicle. However, the present invention is not limited to a display or a speaker. Even if it is a digital television broadcast receiver that can output video and audio by itself, or a receiver that receives an analog television broadcast, or receives a digital or analog radio broadcast Even a receiving apparatus can be applied in the same manner as in the above embodiment to obtain the same effect.

  In the above embodiment, the preset data stored in the memory unit 46 is provided with position information indicating the vehicle position when the preset data is generated and date / time information indicating the date and time at that time. Although described as a thing, this date / time information is not necessarily required, and the intended purpose of the present invention can be achieved simply by adding position information.

  The position information may be any information that can identify the vehicle position. For example, it may be a place name, latitude / longitude information, or map information stored in the map information storage unit 24. It may be a code that can be used to specify the position.

  Furthermore, in the above embodiment, the preset data stored in the memory unit 46 has been described as being automatically updated based on the repacking information. However, for example, when the repacking information is acquired, the repacking is performed. The user may be inquired whether to update the preset data with the information, and the preset data may be updated when the user inputs a preset data update command. Further, for example, when the repacking information is acquired, the user may only be notified that the preset data stored in the memory unit 46 cannot be used.

It is a block diagram showing the structure of the whole multimedia system of embodiment. It is a flowchart showing a channel scan process. It is a flowchart showing a preset data setting process. It is explanatory drawing showing the selection screen of preset data. It is a flowchart showing a preset data switching process. It is a flowchart showing a preset data automatic update process. It is explanatory drawing explaining the automatic switching operation | movement of preset data.

Explanation of symbols

  2 ... operation switch group, 4 ... display, 6 ... speaker, 8 ... vehicle information detection unit, 10 ... multimedia system, 20 ... car navigation unit, 22 ... own vehicle position detection unit, 24 ... map information storage unit, 26 ... Car navigation control unit, 30 ... multi-media device control unit, 40 ... digital television receiving unit, 41 ... antenna, 42 ... tuner unit, 44 ... TS demodulation unit, 45 ... video / audio output circuit, 46 ... memory unit, 48 ... Digital TV reception control unit, 50... System control unit.

Claims (5)

Channel selection means for selecting a broadcast signal from a predetermined broadcast station from among received signals;
Preset data storage means for storing preset data in which identification information of broadcast signals selectable by the channel selection means is registered;
When a preset data generation command is input from the outside, by changing the channel selection frequency of the channel selection unit while monitoring the channel selection state by the channel selection unit, broadcasting that can be selected by the channel selection unit Preset data generating means for detecting a signal, generating the preset data based on the detection result, and storing the preset data in the preset data storage means;
When a channel selection command is input from the outside, based on the channel selection command and preset data stored in the preset data storage unit, a channel selection control unit that sets a broadcast signal to be selected by the channel selection unit;
A broadcast receiver for a mobile unit used by being mounted on a mobile unit,
The preset data storage means is configured to be capable of storing a plurality of preset data generated by the preset data generation means,
Upon receiving the preset data generation command, the preset data generation means acquires position information indicating the current position from the position detection means mounted on the moving body, and adds the position information to the generated preset data. It is configured to store in the preset data storage means,
Furthermore, it comprises preset data setting means for setting one of a plurality of preset data stored in the preset data storage means as preset data used by the channel selection control means ,
The preset data setting means includes:
Preset data display control means for displaying a plurality of preset data stored in the preset data storage means together with position information given to each preset data when a preset data setting command is input from the outside. With
When one of the preset data displayed on the display means by the preset data display control means is designated from the outside, the designated preset data is set as preset data used by the channel selection control means. Mobile broadcast receiver. The preset data generation means, when storing the preset data in the preset data storage means, in addition to the position information, gives time information representing the current date and time to the preset data ,
The preset data display control means receives a plurality of preset data stored in the preset data storage means when the preset data setting command is input from the outside, and each of the preset data includes position information and time information. The mobile broadcast receiver according to claim 1, wherein the mobile broadcast receiver is displayed on a display unit . The preset data setting means includes:
A preset for searching for preset data whose position information is closest to the current position of the moving body from preset data stored in the preset data storage means at predetermined time intervals when automatic switching of the preset data is set Equipped with data retrieval means,
3. The mobile broadcast receiving apparatus according to claim 1 , wherein the preset data searched by the preset data search means is set as preset data used by the channel selection control means . Broadcast frequency change information acquisition means for acquiring broadcast frequency change information representing a change in frequency of a broadcast radio wave transmitted from a broadcast station;
Preset data update means for updating the preset data stored in the preset data storage means based on the broadcast frequency change information acquired by the broadcast frequency change information acquisition means;
Mobile object broadcasting receiving apparatus according to any one of claims 1 to 3, characterized in that with a. This apparatus receives a broadcast radio wave from a broadcasting station that performs digital television broadcasting, selects a digital television broadcasting signal of a predetermined broadcasting channel from the received signals, and demodulates video and audio signals. The mobile broadcast receiving device according to claim 1, wherein the mobile broadcast receiving device is a receiver.