JP4931712B2 - In-vehicle digital broadcast receiving apparatus and electronic program guide acquisition method in the apparatus - Google Patents

Description

  The present invention relates to an in-vehicle digital broadcast receiving apparatus and an electronic program guide acquisition method in the apparatus.

  With ISDB-T (Integrated Service Digital Broadcasting-Terrestrial), it has become possible to broadcast more programs than ever with high quality image quality. In addition, since more channels are promoted, the receiving side needs a more advanced program selection function in addition to the conventional channel selection method. There is known an EPG (Electronic Program Guide) that displays program information for selecting a program using a GUI (Graphical User Interface). The EPG obtains program information from a received signal, stores it in a built-in memory, and displays the earned program information. The EPG displays a current program table for displaying a program currently being broadcast and a program eight days ahead. Two pieces of program information of the weekly program guide to be displayed can be displayed. That is, only program data for 8 days can be stored, and only the EPG of the channel being received can be acquired.

  By the way, it is not a problem for home digital broadcast television receivers to receive EPG by turning on the power regularly in the background even when the power is turned off. In the case of the device, it is generally difficult to turn on the power when the engine is not started because it causes the battery to run out. Therefore, it takes time to display the EPG of the channel being received after the EPG is received, and there is a problem that the EPG of the channel not received cannot be displayed.

  For this reason, the EPG stored in the conventional fixed digital broadcast receiver (home digital television receiver) is converted into, for example, an EPG of a portable digital broadcast receiver (mobile phone or in-vehicle device) via a memory card. A program information display method that integrates and displays it as a program guide and a device used therefor have been proposed (see, for example, Patent Document 1).

JP 2006-41583 A

  However, according to the technique disclosed in Patent Document 1, a user needs to attach a storage medium such as a memory card to a home digital television receiver and a portable digital broadcast receiver and consciously integrate EPG. Therefore, there is a problem that it is burdensome to the user and very inconvenient.

  The present invention has been made in order to solve the above-described problems. An in-vehicle digital broadcast receiving apparatus that can integrate EPG without making the user aware of it, and can shorten the display time of the EPG. It is an object of the present invention to provide an electronic program guide acquisition method in the same apparatus.

In order to solve the above-described problems, an in-vehicle digital broadcast receiving apparatus of the present invention includes a vehicle state detection unit that detects the turning on of a vehicle power supply, a broadcast reception unit that receives broadcast and an electronic program guide,
When the vehicle state detection unit detects that the vehicle power is turned on, the communication unit performs wireless communication with another digital broadcast receiving device, and is stored in the other digital broadcast receiving device via the communication unit. A control unit that acquires the electronic program guide and integrates the electronic program guide and the electronic program guide acquired via the broadcast receiving unit.

  In addition, an electronic program guide acquisition method in an in-vehicle digital broadcast receiver according to the present invention includes a digital broadcast receiver that is located within a wireless communication area and includes at least a communication unit and a storage unit, and the other digital broadcast receiver. Is a method for acquiring an electronic program guide in an in-vehicle digital broadcast receiving apparatus that includes at least a communication unit and a control unit and is connected via a wireless communication medium, wherein the in-vehicle digital broadcast receiving apparatus is a vehicle power supply Triggering the detection of the input of the wireless broadcast with the digital broadcast receiving device to establish synchronization, the digital broadcast receiving device from the in-vehicle digital broadcast receiving device of the electronic program guide Receiving the acquisition request and transmitting the electronic program guide stored in the storage unit to the in-vehicle digital broadcast receiving apparatus that has made the request; The in-vehicle digital broadcast receiving device receives the electronic program guide transmitted from the digital broadcast receiving device, and integrates the received electronic program guide and the electronic program guide stored therein by the control unit; It is what you have.

  According to the present invention, it is possible to integrate an EPG without making the user aware of it, and to provide an in-vehicle digital broadcast receiving apparatus and a method for acquiring an electronic program guide in the apparatus that can shorten the EPG display time. can do.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing the internal configuration of an in-vehicle digital broadcast receiver according to Embodiment 1 of the present invention, and also includes the internal configuration of a home digital broadcast receiver connected via a wireless communication medium. Show.

  As shown in FIG. 1, an in-vehicle digital broadcast receiving apparatus 10 according to Embodiment 1 of the present invention is connected to a home digital broadcast receiving apparatus 20 belonging to a wireless communication area, for example, via a wireless LAN (Local Area Network). Connected with. That is, the vehicle-mounted digital broadcast receiving device 10 mounted on the vehicle and the home at home while the vehicle is stopped at the parking lot or traveling in the vicinity of the parking lot (for example, within 100 m). An environment in which a wireless LAN connection is established with the digital broadcast receiving apparatus 20 is assumed.

  Therefore, the home digital broadcast receiving apparatus 20 includes a broadcast receiving unit 21, a signal separating unit 22, a video / audio reproducing unit 23, a synthesizing unit 24, a video / audio output unit 25, a control unit 27, and a display unit. In addition to the standard configuration as a digital television broadcast receiver composed of 28, a power supply control unit 29, and a storage unit 30, the communication unit 26 has a built-in wireless LAN adapter. Therefore, a program for performing wireless LAN communication with the in-vehicle digital broadcast receiving apparatus 10 is added to the control unit 27 in accordance with the wireless LAN communication protocol. Details will be described later.

  On the other hand, the in-vehicle digital broadcast receiving device 10 is similar to the home television broadcast receiving device. The broadcast receiving unit 11, the signal separating unit 12, the video / audio reproduction unit 13, the synthesis unit 14, the video / audio output unit 15, The communication unit 16, the control unit 17, the display unit 18, the power supply control unit 19, the vehicle state detection unit 41, and the storage unit 40 are configured.

  In the above configuration, the in-vehicle digital broadcast receiving apparatus 10 converts a signal received via the broadcast receiving antenna into a digital signal by the broadcast receiving unit 11, and converts the signal into a video / audio signal and a control signal such as EPG by the signal separating unit 12. To separate. The separated video / audio signal is decoded by the video / audio reproduction unit 13, and a control signal such as EPG is processed by the control unit 17 and stored in the storage unit 40. Then, the control unit 17 processes the control signal based on the user request and the like, displays the OSD (ON Screen Display) on the display unit 18, and also displays the OSD and the video / audio signal output from the video / audio reproduction unit 13. Are synthesized by the synthesis unit 14 and output to a video / audio reproduction system (monitor, speaker) (not shown) via the video / audio output unit 15.

  By the way, the vehicle state detection unit 41 detects the ON / OFF state of the vehicle power supply (ACC: accessory power supply) and notifies the control unit 17 of it. Further, the communication unit 16 has a built-in LAN adapter and can perform short-range wireless communication with an access point via a communication antenna. Note that the in-vehicle digital broadcast receiving apparatus 10 is normally in a power saving mode to prevent the battery from running out, and cannot receive broadcast waves with high power consumption when the ACC is turned off.

  The home digital broadcast receiving apparatus 20 has the same configuration as the above-described in-vehicle digital broadcast receiving apparatus 10 except for the vehicle state detection unit 41, and performs the same operation. The description is omitted. However, since the home digital broadcast receiving apparatus 20 is not battery-driven but always AC-driven, even if the power is turned off on the surface, the power is automatically turned on in the background as needed to broadcast waves. Can be received. Details will be described later.

FIG. 2 is a block diagram showing a functional development of the internal configuration of the control unit 17 of the in-vehicle digital broadcast receiving apparatus 10 according to Embodiment 1 of the present invention.
As shown in FIG. 2, the control unit 17 includes an access point search unit 171, an authentication control unit 172, a preset channel generation unit 173, and an EPG reception integration unit 174.

The access point search unit 171 controls the communication unit 16 to search for the home digital broadcast receiving device 20 having a connectable access point when the vehicle state detection unit 41 detects that the vehicle power is turned on. It has a function. At this time, when a connectable access point is searched, the communication unit 16 performs wireless communication according to a predetermined protocol with the corresponding home digital broadcast receiving device 20, and the corresponding home digital broadcast receiving device. An electronic program guide is acquired from 20.
The authentication control unit 172 performs authentication with the home digital broadcast receiving apparatus 20, transmits a preset channel via the communication unit 16 only when authentication is established, and acquires the corresponding electronic program guide. Has the function to allow. At this time, the preset channel generation unit 173 generates channel information that the user desires to receive and outputs the channel information to the communication unit 16.

  The EPG reception integration unit 174 acquires the electronic program guide stored in the home digital broadcast receiving device 20 via the communication unit 16, and the electronic program guide acquired via the broadcast reception unit 11. The table is integrated and stored in the storage unit 40.

FIG. 3 is a sequence diagram showing an electronic program guide acquisition method in the in-vehicle digital broadcast receiving apparatus according to Embodiment 1 of the present invention.
The electronic program guide acquisition method according to the embodiment of the present invention will be described below with reference to the sequence diagram shown in FIG.

First, in a state where the engine is started from a state where the vehicle has been stopped for a long time (from an ACC power-off state to an on-state transition), the contents of the EPG accumulated in the storage unit 40 of the in-vehicle digital broadcast receiving device 10 Is old and has nothing new.
On the other hand, as described above, since the home digital broadcast receiving apparatus 20 is always supplied with power, the EPG is regularly updated even when the power is off, and the latest EPG is always stored in the storage unit 30. Accumulated.

  For this reason, the in-vehicle digital broadcast receiving device 10 (control unit 17) controls the communication unit 16 to perform communication when the engine is started and the ACC power supply is detected (step ST31 “Yes”). The home digital broadcast receiving device 20 capable of communication is searched and communicated. That is, synchronization is established with the home digital broadcast receiving device 20 in the communication range including authentication (step ST32). Here, it is assumed that EPG integration is permitted only in the case of digital broadcast receiving apparatuses registered in advance or digital broadcast receiving apparatuses that have already been authenticated. Note that authentication is not necessary if unnecessary.

  The communication may be started when the power is turned on by a user operation instead of the communication start by ACC on. The communication here assumes near field communication by a wireless LAN or the like. Therefore, a communication partner is found by a handshake according to a wireless LAN communication protocol (for example, IEEE 802.11e). Instead, it may be possible to use a public communication line with a mobile phone or the like, but in this case, communication costs are incurred. By using the wireless LAN, an effect that no communication cost is generated can be obtained.

  Next, the in-vehicle digital broadcast receiver 10 (control unit 17) issues an EPG acquisition request to the home digital broadcast receiver 20 that has been authenticated (step ST33). Receiving this, the home digital broadcast receiving device 20 reads the EPG stored in the storage unit 30 via the communication unit 16 and transmits it to the requested in-vehicle digital broadcast receiving device 10 (step ST34). The in-vehicle digital broadcast receiving device 10 acquires the latest EPG, and integrates the EPG and the EPG acquired by the device itself via the broadcast receiving unit 11 (step ST35). Here, the integration of the EPG may be, for example, a method in which only the difference is rewritten by comparing with the EPG accumulated by the difference calculation or the like. Specifically, it is disclosed in Patent Document 1 described in the background art.

  It should be noted that EPG integration is performed from the one with the highest priority, so that only EPGs that are frequently used will be integrated even if communication is interrupted in the middle, such as when moving out of the communicable range due to movement during communication. It becomes possible. However, priorities need not be assigned when the communication speed is sufficient.

  Here, the priority order may be an EPG close to the current date and time, an EPG excluding detailed information, an EPG with a common preset channel, an EPG with a high frequency of use by the user, or the like. By preferentially integrating EPGs close to the current date and time, there is a high possibility that EPGs close to the current date and time that are frequently used can be used even if communication is interrupted. Further, by preferentially integrating EPGs excluding detailed information, EPGs such as frequently used program names and program start times are more likely to be usable even if communication is interrupted in the middle. In addition, the preset channels can be integrated from the EPG that can be received by the in-vehicle digital broadcast receiver 10 by preferentially integrating the common channels in the in-vehicle digital broadcast receiver 10 and the home digital broadcast receiver 20. There is a high possibility that an EPG that can be received even if communication is interrupted in the middle can be used. Further, by preferentially integrating EPGs of channels with high user usage frequency, it is highly possible that EPGs of channels with high user usage frequency can be used even if communication is interrupted in the middle.

FIG. 4 is a flowchart showing the operation of the in-vehicle digital broadcast receiving apparatus 10 (control unit 17) according to Embodiment 1 of the present invention.
Hereinafter, the operation of the control unit 17 shown in FIG. 2 will be described in detail with reference to the flowchart shown in FIG.

  In the in-vehicle digital broadcast receiving apparatus 10, when the engine is started, the vehicle state detection unit 41 detects that the ACC power is turned on, and activates the access point search unit 171 under the control of the control unit 17. The access point search unit 171 searches for the home digital broadcast receiver 20 having a connectable access point when the vehicle state detection unit 41 detects that the ACC power is turned on (step ST41 “Yes”) (step ST41). ST42). Here, when the access point search unit 171 finds a connectable access point (step ST43 “Yes”), the authentication control unit 172 is activated, and the authentication control unit 172 performs the corresponding home digital broadcast receiving device 20. Authentication according to the wireless LAN protocol.

When the authentication is established (step ST44 “Yes”), the authentication control unit 172 activates the preset channel generation unit 173, and the preset channel generation unit 173 generates an EPG acquisition request based on a desired preset channel (step S44). ST45), and transmits to the other party's home digital broadcast receiver 20 via the communication unit 16. When a connectable access point cannot be found (step ST43 “No”) and when authentication is not established (step ST44 “No”), the process returns to step ST42.
Subsequently, the corresponding digital EPG is transmitted from the home digital broadcast receiver 20, and the in-vehicle digital broadcast receiver 10 that has received the EPG via the communication unit 16 is the EPG reception integration unit 174, which itself is the storage unit 40. Integration processing is performed with the EPG stored in (step ST46). Here, as the integration process, a method of performing a difference calculation between the received EPG and the EPG accumulated by itself, or updating only the obtained difference is considered.

Next, when the communication is disconnected due to movement or communication is interrupted during the above-described integration process due to noise or the like (step ST47 “Yes”), the process returns to step ST42 and the series of EPG acquisition processes described above is performed. repeat.
Further, when the EPG is acquired from the home digital broadcast receiving apparatus 20 and the communication is completed (step ST48 “Yes”), the series of EPG acquisition processes described above is terminated, and when the communication is continuing (step ST48 “ No "), EPG reception integration processing is repeated.

  In the EPG reception integration process of step ST46, EPG integration is performed from the highest priority as described above, that is, EPG close to the current date and time, EPG excluding detailed information, and preset channels are common. EPG, EPG of channels with high user usage frequency, etc. are preferentially integrated. The priority order can be selected by the user when setting the operating environment. This makes it possible to integrate only EPGs that are frequently used even if communication is interrupted in the middle, such as when the communication is out of the communicable range during communication,

  FIG. 5 is a flowchart showing the operation of the home digital broadcast receiving apparatus 20 (control unit 27). Hereinafter, the operation of the home digital broadcast receiving apparatus 20 (control unit 27) will be described in detail.

In the home digital broadcast receiving apparatus 20 (control unit 27), the communication unit 26 is always in a communication standby state (step ST51). When the communication request (handshake) is received from the in-vehicle digital broadcast receiving apparatus 10 and the authentication is established (step ST52 “Yes”), the in-vehicle digital broadcast receiving apparatus 10 receives the preset channel and EPG acquisition request ( Step ST53).
In response to this, the home digital broadcast receiving apparatus 20 (control unit 27) confirms the current time with reference to a built-in timer (not shown) (step ST54), for example, other than the detailed information of the received preset channel. In addition, the EPG stored in the storage unit 30 in the new order after the current time is transmitted to the requested on-vehicle digital broadcast receiving apparatus 10 via the communication unit 26 (step ST55).

  When communication is interrupted during EPG transmission (step ST56 “Yes”), the communication standby state of step ST51 is returned, and when the EPG transmitted in step ST55 is completed (step ST57 “Yes”), it is excluded in the previous transmission. The detailed information of the preset channel is transmitted in the new order after the current time (step ST58). If communication is interrupted during this EPG transmission (step ST59 “Yes”), the communication standby state of step ST51 is returned, and if the EPG transmitted in step ST58 is ended (step ST60 “Yes”), communication of step ST51 is performed. Return to standby.

  If the communication is not interrupted in steps ST57 and ST60 (steps ST56 “No” and ST59 “No”) and the transmission of the respective EPGs is not completed (steps ST57 “No” and ST60). “No”) repeats the transmission process of each EPG (steps ST55 and ST58).

As described above, according to the first embodiment, the in-vehicle digital broadcast receiving device 10 (the control unit 17) uses the vehicle state detection unit 41 to detect the turning on of the vehicle power supply as a trigger. Perform wireless communication with the receiving device 20, acquire the EPG stored in the home digital broadcast receiving device 20 through the communication unit 16, and integrate the EPG and the EPG acquired through the broadcast receiving unit 11. Thus, EPG integration can be performed without making the user aware of it, and the display time of the EPG can be shortened.
EPG integration is based on EPG close to the current date and time, EPG excluding detailed information, EPG with a common preset channel, EPG of a channel that is frequently used by users, etc. If the communication range is interrupted, the EPG that is frequently used can be integrated even if the communication is interrupted.

Embodiment 2. FIG.
FIG. 6 is a block diagram showing the internal configuration of the in-vehicle digital broadcast receiving apparatus according to Embodiment 2 of the present invention, and the internal configuration of another in-vehicle digital broadcast receiving apparatus connected via a wireless communication medium is also shown. Shown together.
The difference from the first embodiment shown in FIG. 1 is that in the first embodiment, the home digital broadcast receiving device 20 connected to the on-vehicle digital broadcast receiving device 10 via a wireless communication medium is replaced with another on-vehicle digital broadcast device. It is replaced with the broadcast receiving apparatus 50. It can be assumed that the vehicles communicate with each other when they enter each other's communication range, such as while traveling, perform EPG reception integration, and rewrite the latest EPG. In particular, when the vehicle moves over a long distance and passes the local vehicle, the EPG of the program broadcast locally can be automatically acquired if the above-described EPG reception integration function is provided.

  The configuration of the other in-vehicle digital broadcast receiving device 50 shown in FIG. 6 is the same as the configuration of the in-vehicle digital broadcast receiving device 10 that is a communication partner, and the broadcast receiving unit 51, the signal separating unit 52, and the video / audio reproduction. A unit 53, a synthesis unit 54, a video / audio output unit 55, a communication unit 56, a control unit 57, a display unit 58, a power supply control unit 59, a storage unit 60, and a vehicle state detection unit 61. Is done.

  In this case, the in-vehicle digital broadcast receiver 10 (the control unit 17) controls the communication unit 16 when the input of the vehicle power source (ACC) is detected, and other in-vehicle use having an access point that can be connected. When the digital broadcast receiving device 50 is searched and a connectable access point is searched, for example, wireless communication is performed with the corresponding other in-vehicle digital broadcast receiving device 50 in accordance with the protocol of the wireless LAN. EPG is acquired from the other in-vehicle digital broadcast receiver 50.

  That is, the in-vehicle digital broadcast receiving device 10 that is the EPG acquisition request source executes the process shown in the flowchart in FIG. 4 as in the first embodiment, and the other in-vehicle digital broadcast receiving device 50 that is the EPG supply destination is The processing shown in the flowchart in FIG. 5 is executed. Each process described above is stored as a program in each of the storage units 40 and 60 included in the respective digital broadcast receiving apparatuses 10 and 50, and the respective control units 17 and 57 sequentially read out and execute them, so that the in-vehicle digital The EPG reception integration function by the broadcast receiving device 10 is realized, and updating to the latest electronic program guide is possible without making the user aware of it.

Also, in the second embodiment, as in the first embodiment, in the above-described EPG reception integration function, EPGs with higher priorities are sequentially acquired and integrated.
The in-vehicle digital broadcast receiving device 10 (control unit 17) searches for another in-vehicle digital broadcast receiving device 50 having an access point that can be connected when the own vehicle enters the wireless communication area. Similar effects can be obtained.

As described above, according to the second embodiment, the in-vehicle digital broadcast receiving device 10 (control unit 17) is triggered by the fact that the vehicle state detection unit 61 detects that the vehicle power is turned on. The EPG accumulated in the other in-vehicle digital broadcast receiving device 50 is obtained through wireless communication with the broadcast receiving device 50, and the EPG acquired through the broadcast receiving unit 11 is obtained. By integrating, EPG can be integrated without making the user aware of it, and the display time of EPG can be shortened.
EPG integration is based on EPG close to the current date and time, EPG excluding detailed information, EPG with a common preset channel, EPG of a channel that is frequently used by users, etc. If the communication range is interrupted, the EPG that is frequently used can be integrated even if the communication is interrupted.

  The electronic program guide acquisition method in the in-vehicle digital broadcast receiving apparatus of the present invention is, for example, located in the wireless communication area in FIG. 1 and includes at least the communication unit 26 (56) and the storage unit 30 (60). The digital broadcast receiver 20 (50) and the home digital broadcast receiver 20 are connected to each other via a wireless communication medium (wireless LAN), and are equipped with at least a communication unit 26 and a control unit 27. A method for acquiring an electronic program guide in the broadcast receiving apparatus 10, for example, in FIG. 3, the digital broadcast receiving apparatus (for home use) is triggered when the in-vehicle digital broadcast receiving apparatus 10 detects that the vehicle power is turned on. Steps of establishing communication by performing wireless communication with the digital broadcast receiving apparatus 20 or other in-vehicle digital broadcast receiving apparatus 50 (ST31, 3) ), And the digital broadcast receiving device 20 (50) receives an electronic program guide acquisition request from the in-vehicle digital broadcast receiving device 10, and stores the request to the in-vehicle digital broadcast receiving device 10 that has made the request. Transmitting the electronic program guide stored in the unit 30 (ST33, ST34), and the in-vehicle digital broadcast receiver 10 receives the electronic program guide transmitted from the digital broadcast receiver 20 (50). The control unit 17 integrates the received electronic program guide with the electronic program guide stored by itself (ST35).

  According to the electronic program guide obtaining method in the in-vehicle digital broadcast receiving apparatus of the present invention, the in-vehicle digital broadcast receiving apparatus 10 is triggered by the detection of turning on of the vehicle power supply. Alternatively, wireless communication is performed with another in-vehicle digital broadcast receiving device 50, an electronic program guide stored in the home digital broadcast receiving device 20 or another in-vehicle digital broadcast receiving device 50 is acquired, and the electronic program guide By integrating the electronic program guide acquired by itself, the electronic program guide can be integrated without making the user aware of it, and the display time of the electronic program guide can be shortened.

According to the first embodiment and the second embodiment described above, a wireless LAN or the like is provided between the in-vehicle digital broadcast receiving device 10 and the home digital broadcast receiving device 20 or another in-vehicle digital broadcast receiving device 50. However, the present invention is not limited to short-range wireless communication, but can be replaced by medium or long-range wireless communication media. In this case, since the communication range is remarkably widened, the probability of acquiring an EPG is higher than that of short-range wireless communication.
2 may be realized entirely by software, or at least a part thereof may be realized by hardware. The functions of the constituent blocks included in the control unit 17 of the in-vehicle digital broadcast receiving apparatus 10 shown in FIG. For example, the data processing in the access point search unit 171, authentication control unit 172, preset channel generation unit 173, EPG reception integration unit 174 may be realized on a computer by one or a plurality of programs, and at least a part thereof May be realized by hardware.

It is a block diagram which shows the internal structure of the vehicle-mounted digital broadcast receiver which concerns on Embodiment 1 of this invention, and a home digital broadcast receiver. It is the block diagram which expanded the function and showed the internal structure of the control part 17 of the vehicle-mounted digital broadcast receiver which concerns on Embodiment 1 of this invention. FIG. 2 is a sequence diagram showing an electronic program guide acquisition method in the in-vehicle digital broadcast receiving apparatus according to Embodiment 1 of the present invention. It is a flowchart which shows operation | movement of the vehicle-mounted digital broadcast receiver which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the vehicle-mounted digital broadcast receiver which concerns on Embodiment 1 of this invention. It is a block diagram which shows the internal structure of the vehicle-mounted digital broadcast receiver which concerns on Embodiment 2 of this invention, and another vehicle-mounted digital broadcast receiver.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 In-vehicle digital broadcast receiver, 11 Broadcast receiving part, 12 Signal separation part, 13 Video / audio reproduction part, 14 Composition part, 15 Video / sound output part, 16 Communication part, 17 Control part, 18 Display part, 19 Power supply control part , 40 storage unit, 171 access point search unit, 172 authentication control unit, 173 preset channel generation unit, 174 EPG reception integration unit.

Claims (12)

A vehicle state detection unit for detecting vehicle power on,
A broadcast receiver for receiving broadcast and electronic program guides;
A communication unit that performs wireless communication with other digital broadcast receivers when the vehicle state detection unit detects that the vehicle power is turned on,
A controller that acquires the electronic program guide stored in the other digital broadcast receiver via the communication unit, and integrates the electronic program guide and the electronic program guide acquired via the broadcast receiver;
An in-vehicle digital broadcast receiver characterized by comprising: The controller is
Searching for a home digital broadcast receiver having an access point that can be connected by controlling the communication unit upon detection of turning on of the vehicle power, and if the connectable access point is searched, 2. The in-vehicle use according to claim 1, wherein wireless communication is performed in accordance with a predetermined protocol with said home digital broadcast receiving apparatus, and an electronic program guide is obtained from said home digital broadcast receiving apparatus. Digital broadcast receiver. The controller is
When other vehicle-mounted digital broadcast receivers having access points that can be connected by controlling the communication unit upon detection of turning on of the vehicle power source are searched, and the connectable access points are searched 2. The wireless communication according to a predetermined protocol is performed with the corresponding in-vehicle digital broadcast receiving apparatus, and an electronic program guide is acquired from the other in-vehicle digital broadcast receiving apparatus. The on-vehicle digital broadcast receiver described. The controller is
When another vehicle-mounted digital broadcast receiving device having an access point that can be connected by controlling the communication unit when the host vehicle enters the wireless communication area is searched, and the connectable access point is searched 2. The wireless communication according to a predetermined protocol is performed with the corresponding in-vehicle digital broadcast receiving apparatus, and an electronic program guide is acquired from the other in-vehicle digital broadcast receiving apparatus. The on-vehicle digital broadcast receiver described. The controller is
When the own vehicle has entered the wireless communication area, the communication unit is controlled to search for a home digital broadcast receiver having a connectable access point, and when the connectable access point is searched, 2. The in-vehicle use according to claim 1, wherein wireless communication is performed in accordance with a predetermined protocol with said home digital broadcast receiving apparatus, and an electronic program guide is obtained from said home digital broadcast receiving apparatus. Digital broadcast receiver. The controller is
The authentication is performed with the other digital broadcast receiving apparatus, and a preset channel is transmitted via the communication unit only when the authentication is established, and a corresponding electronic program guide is acquired. The in-vehicle digital broadcast receiver according to any one of claims 1 to 5. The controller is
The in-vehicle digital broadcast receiving apparatus according to any one of claims 1 to 6, wherein the in-vehicle digital broadcast receiving apparatus sequentially acquires electronic program guide information with high priority via the communication unit. The controller is
8. The in-vehicle digital broadcast receiving apparatus according to claim 7, wherein the digital broadcast receiving apparatus is sequentially acquired from electronic program guide information close to a current date and time via the communication unit. The controller is
8. The in-vehicle digital broadcast receiving apparatus according to claim 7, wherein the digital broadcast receiving apparatus is sequentially acquired from electronic program guide information excluding detailed program information via the communication unit. The controller is
The in-vehicle digital broadcast receiving apparatus according to claim 7, wherein the digital broadcast receiving apparatus is sequentially acquired from electronic program guide information of a channel with high viewing frequency via the communication unit. The controller is
8. The in-vehicle digital broadcast receiving apparatus according to claim 7, wherein the digital broadcast receiving apparatus for in-vehicle use is sequentially acquired from electronic program guide information whose preset channel matches that of another digital broadcast receiving apparatus via the communication unit. A digital broadcast receiving apparatus that is located in a wireless communication area and includes at least a communication unit and a storage unit, and at least a communication unit and a control unit that are connected to the digital broadcast reception apparatus via a wireless communication medium. An electronic program guide acquisition method in an in-vehicle digital broadcast receiver,
The in-vehicle digital broadcast receiver is
Performing wireless communication with the digital broadcast receiving device in response to detection of vehicle power-on, and establishing synchronization; and
The digital broadcast receiver is
Receiving an electronic program guide acquisition request from the in-vehicle digital broadcast receiver, and transmitting the electronic program guide stored in the storage unit to the requested in-vehicle digital broadcast receiver;
The in-vehicle digital broadcast receiver is
Receiving the electronic program guide transmitted from the digital broadcast receiver, and integrating the received electronic program guide and the electronic program guide stored therein by the control unit;
A method for acquiring an electronic program guide in an in-vehicle digital broadcast receiving device.

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