JP2007129389A - Receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receiver for reducing a switching time in the case of switching frequency bands of a broadcast program. <P>SOLUTION: The receiver 1 provided with a reception section 3 for switchingly receiving the same broadcast program broadcast for different frequency bands in different areas includes: a storage section 8 for storing a switching history of the frequency bands by the reception section 3; and a control section 7 for allowing the reception section 3 to switchingly receive the broadcast program with the different frequency band on the basis of the switching history stored in the storage section 8 when the receiver 1 moves from an area to another area. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a receiving apparatus that receives a program broadcast.

  Hereinafter, a conventional receiving apparatus will be described with reference to the drawings. FIG. 13 is a block diagram of a conventional receiving apparatus. In FIG. 13, a receiving apparatus 101 is connected to the output side of the antenna 102, receives a program broadcast of a specific frequency band, and receives a frequency band information received by the receiving section 103. The control unit 107 reads the reception frequency band information of the storage unit 108 and sets the frequency band in the reception unit. The receiving apparatus 101 also demodulates a signal from the receiving unit 103, a signal processing unit 105 that decodes the signal from the demodulating unit 104, and a program broadcast that is a signal from the signal processing unit 105. A playback unit 106 for playback.

  Here, the operation of the receiving apparatus 101 in a broadcasting system in which the same program broadcast is broadcast in different frequency bands in the first area, the second area, and the third area will be described.

  When the receiving apparatus 101 moves from the first area to the second area, the receiving unit 103 starts receiving the same program broadcast based on the reception history stored in the storage unit 108 from the state of receiving the program broadcast of a certain frequency band. A program broadcast of a different frequency band including broadcast information indicating that is switched is received. For example, service linking in DAB (Digital Audio Broadcasting) which is digital audio broadcasting corresponds to this.

As a prior art document related to the invention of this application, for example, Patent Document 1 is known.
JP 2002-185414 A

  In such a conventional receiving apparatus, the control unit 107 simply switches to a different frequency band based on the reception history stored in the storage unit 108, and therefore the frequency in which the same program broadcast is included in the second area. The possibility of selecting a belt was low. As a result, there is a problem that it takes time before the receiving unit 103 can receive the same program broadcast again.

  Therefore, the receiving apparatus according to the present invention solves this problem and aims to shorten the time until the receiving unit can receive the same program broadcast again.

  In order to achieve this object, the receiving apparatus of the present invention is a receiving apparatus that includes a receiving unit that switches and receives the same program broadcast that is broadcast in a different frequency band in different areas, and the program broadcast in the receiving unit When the receiver moves from one area to another area, the program broadcast of the different frequency band is transmitted to the receiver based on the switching history stored in the storage unit. And a control unit for switching reception.

  Thereby, when the receiving apparatus moves from the first area to the second area, the control unit selects different frequency bands having the highest probability of being the same program broadcast based on the switching history stored in the storage unit. . As a result, there is a high possibility that the receiving unit switches and receives the same program broadcast in different frequency bands. As a result, it is possible to shorten the time until the receiving unit can receive the same program broadcast again.

(Embodiment 1)
Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIGS. FIG. 1 is a block diagram of a receiving apparatus according to this embodiment.

  In FIG. 1, the receiving device 1 is a radio tuner mounted on a vehicle, for example. The receiving device 1 includes an antenna 2 and a receiving unit 3 connected to the output side of the antenna 2. Further, the demodulator 4, the signal processor 5, and the reproducing unit 6 are connected in this order on the output side of the receiver 3. A control unit 7 is connected to the reception unit 3, the demodulation unit 4, and the signal processing unit 5. A storage unit 8 is connected to the control unit 7.

  The receiving unit 3 selects and receives a service that is a program broadcast in a specific frequency band from a plurality of ensembles that are signals in a plurality of frequency bands in the DAB broadcast received by the antenna 2. The receiving unit 3 receives information on a frequency band to be received and information on a program broadcast to be selected from the control unit 7, thereby receiving a program broadcast in a specific frequency band. The program broadcast received by the reception unit 3 is demodulated by the demodulation unit 4, decoded by the signal processing unit 5, and reproduced by the reproduction unit 6.

  The storage unit 8 stores a switching history of frequency bands for each program broadcast received by the receiving unit 3, and the switching history is written and read by the control unit 7.

  Here, it is assumed that the same program broadcast is broadcast in different first, second, and third frequency bands in different first, second, and third areas. In this case, the operation of the frequency band switching process in the control unit 7 of the receiving apparatus 1 will be described with reference to FIG.

  As an initial state, it is assumed that the receiving device 1 exists in the first area. First, in start processing step S1, the control unit 7 detects a request to receive a program broadcast of the first frequency band. This request is, for example, an operation input for receiving the first frequency band from the outside.

  Next, the control unit 7 performs a program broadcast receiving step S2 for receiving a program broadcast in the first frequency band. The control unit 7 supplies information on the first frequency band program broadcast to the receiving unit 3, and the receiving unit 3 receives the first frequency band program broadcast.

  Next, in the control part 7, movement detection step S3 is performed. In the movement detection step S3, when the control unit 7 detects a movement of the receiving device 1 from the first area to the second area under some condition, the control history reading step S4 is performed. If the movement is not detected, the control unit 7 continues to receive the program broadcast in the first frequency band, and performs movement detection step S3 at an appropriate timing.

  In the switching history reading step S <b> 4, the control unit 7 reads the switching history from the storage unit 8. Next, the control part 7 performs 2nd frequency band selection step S5. In the second frequency band selection step S5, the control unit 7 selects a second frequency band having a high priority based on the switching history. For example, the control unit 7 selects a program broadcast in the second frequency band having the highest frequency as a switching destination using the switching frequency derived from the switching history. The switching history is, for example, link destination information included in an ensemble of DAB broadcasting, or switching destination information of the same program broadcast obtained by searching reception history information stored in advance in the receiving device 1. At this time, two or more switching destinations may be indicated in the same program broadcast. When the control unit 7 selects one of these two or more switching destinations, simply selecting the switching destination based on the reception history sets the second frequency band regardless of the movement characteristics of the receiving device 1. You will choose. In this case, there is a high possibility that the second frequency band does not include the same program broadcast, and as a result, it becomes necessary to select and receive the next frequency band, resulting in a long switching time. Therefore, it is expected that the same program broadcast in the second frequency band can be selected more accurately by assigning priority of the switching destination that is derived from the switching history and adapted to the movement characteristics of the receiving device 1.

  Next, in the control part 7, program broadcast reception step S6 of the second frequency band is performed. In the second frequency band program broadcast receiving step S6, the control unit 7 supplies the selected second frequency band program broadcast information to the receiving unit 3, so that the receiving unit 3 receives the second frequency band program broadcast. Is switched and received.

  Next, in the control unit 7, a switching history update step S7 is performed. In the switching history update step S <b> 7, the control unit 7 writes the switching history from the first frequency band to the second frequency band in the storage unit 8.

  As described above, the control unit 7 selects different frequency bands having the highest probability of being the same program broadcast based on the switching history stored in the storage unit 8. As a result, there is a high possibility that the receiving unit 3 switches and receives the same program broadcast in different frequency bands. As a result, the time until the receiving unit 3 can receive the same program broadcast again can be shortened.

  For example, when the receiving device 1 is a receiving device that moves within the same range every day or a radio receiving device that is mounted on a vehicle and receives during commuting, the switching history of frequency bands in the commuting route is stored with high frequency. Therefore, the control unit 7 can determine the priority of such switching. As a result, it is possible to select the second frequency band that is less likely to fail as the switching destination, and the switching time can be shortened.

  The receiving unit 3 is not limited to receiving a DAB broadcast frequency band, but may be any of analog broadcast, digital broadcast radio, and television. Even in such a case, when the same program broadcast is broadcast in different frequency bands, the switching time can be shortened when the frequency band needs to be switched due to movement.

(Embodiment 2)
Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. 3 and FIG. Note that, unless otherwise specified, the same as in the first embodiment.

  FIG. 3 is a block diagram of a receiving apparatus according to the second embodiment. In FIG. 3, a reception quality detection unit 9 is provided between the reception unit 3 and the control unit 7. The reception quality detection unit 9 detects the reception quality of the signal in the frequency band received by the reception unit 3 and transmits the result to the control unit 7. This reception quality is, for example, reception intensity or BER (Bit Error Rate) of the reception signal.

  Next, the operation of the frequency band switching process in the control unit 7 of the receiving apparatus 1 will be described with reference to FIG. 4 is different from FIG. 2 in that the process in the movement detection step S3 is different.

  In this movement detection step S3, the control unit 7 obtains reception quality information from the reception quality detection unit 9, and when the reception quality is worse than an arbitrary threshold for a predetermined time, the control unit 7 starts from the first frequency band. Switching to the second frequency band is determined. Note that the reason why the predetermined time has elapsed is to prevent complicated switching.

  Thus, the control unit 7 detects the movement of the receiving device 1 by comparing the arbitrary threshold value with the reception quality of the program broadcast in the first frequency band. As a result, the frequency band switching time based on the switching history can be shortened by detecting the movement in switching the frequency band of the received signal accompanying the movement.

  The reception quality detection unit 9 may or may not be included in the same IC as the reception unit 3.

(Embodiment 3)
Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIGS. Note that, unless otherwise specified, the same as in the first embodiment.

  FIG. 5 is a block diagram of a receiving apparatus according to the third embodiment. In FIG. 5, the position information detection unit 10 is connected to the control unit 7. The position information detection unit 10 includes, for example, a GPS (Global Positioning System) receiver, detects the geographical current position of the reception device 1, and transmits the result to the control unit 7.

  Next, the operation of the frequency band switching process in the control unit 7 of the receiving device 1 will be described with reference to FIG. 6 differs from FIG. 2 in that the processing in the movement detection step S3 is different.

  In this movement detection step S3, the control unit 7 acquires the position information from the position information detection unit 10, and detects the movement of the receiving device 1 from the first area to the second area by reaching a specific range. .

  As described above, the control unit 7 detects the movement of the reception device 1 based on the position information supplied from the position information detection unit 10. As a result, the frequency band switching time based on the switching history can be shortened by detecting the movement condition in switching the frequency band accompanying movement.

(Embodiment 4)
Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. 7 and FIG. Note that, unless otherwise specified, the same as in the first embodiment.

  FIG. 7 is a block diagram of a receiving apparatus according to the fourth embodiment. In FIG. 7, the time holding unit 11 is connected to the storage unit 8 and the control unit 7. The time holding unit 11 is a block that holds a time supplied from the outside by, for example, a built-in RTC (Real Time Clock), a timer function such as a microcomputer, or wireless broadcasting or wireless communication. The time holding unit 11 stores the time when the switching occurs in the storage unit 8 as a part of the switching history. In addition, when the receiving device 1 moves from the first area to the second area, the control unit 7 sets the receiving unit 3 to the first receiving unit 3 based on the time information from the time holding unit 11 and the switching history stored in the storage unit 8. Switch and receive program broadcasts in two frequency bands.

  Next, the operation of the frequency band switching process in the control unit 7 of the receiving apparatus 1 will be described with reference to FIG. 8 is different from FIG. 2 in that a time information reading step S8 is provided after the movement detecting step S3.

  In this time information reading step S <b> 8, the control unit 7 acquires time information from the time holding unit 11. The acquired time information is used as follows in the second frequency band selection step S5 for performing selection of switching.

  In the second frequency band selection step S5, when the control unit 7 selects the second frequency band based on the switching history, the time information stored as a part of the switching history and the current information from the time holding unit 11 are displayed. Time information is compared, and the second frequency band is selected based on the time information in the switching history that is within a predetermined range from the current time information.

  Further, in the switching history update step S <b> 7, when updating the switching history of the storage unit 8, the control unit 7 stores the current time information in the storage unit 8 as a part of the switching history.

  As described above, the time information from the time holding unit 11 is stored as a part of the switching history, and by comparing the time of the switching history with the current time, the frequency band further adapted to the behavioral characteristics of the receiving device 1 Can be selected. As a result, it is possible to further shorten the time for switching between broadcast programs in the frequency band. For example, when the receiving device 1 is a receiving device provided in a vehicle for commuting, switching from the first frequency band to the second frequency band often occurs at 9 o'clock in the morning. When returning home, the control unit can determine the switching frequency depending on the current time that switching from the second frequency band to the third frequency band often occurs.

(Embodiment 5)
Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. 9 and FIG. Note that, unless otherwise specified, the same as in the first embodiment.

  FIG. 9 is a block diagram of a receiving apparatus according to the fifth embodiment. In FIG. 9, the calculation unit 12 is connected to the storage unit 8 and the control unit 7. The calculation unit 12 reads the switching history of the storage unit 8, derives a switching list having the first frequency band selected first as the head element, and stores the result in the storage unit 8. In this switching list, for example, switching destinations are arranged in order of switching frequency with respect to switching sources. Note that by selecting elements of this switching list in turn as switching destinations, it is possible to hold a path of switching information, such as a car navigation path.

  Next, the operation of the frequency band switching process in the control unit 7 of the receiving device 1 will be described with reference to FIG. 10 differs from FIG. 2 in that a switching history reading step S4 and a switching list creating / storing step S9 are sequentially provided before the movement detecting step S3, and a switching list reading step is provided after the movement detecting step S3. S10 is provided.

  In this switching history reading step S <b> 4, the control unit 7 acquires switching history information from the storage unit 8. The acquired switching history information is supplied to the calculation unit 12. In the switching list creation / storage step S9, the control unit 7 supplies the switching history information to the calculation unit 12, and causes the calculation unit 12 to derive a switching list by a predetermined method. This switching list is stored in the storage unit 8.

  In the switching list reading step S10, the control unit 7 reads the elements of the switching list from the storage unit 8 as the switching destination information. Compared with the first embodiment, this operation can omit the selection process of the switching destination based on the switching history, so that the time for the switching operation can be further shortened.

(Embodiment 6)
Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. 11 and FIG. Note that, unless otherwise specified, the same as in the first embodiment.

  FIG. 11 is a block diagram of a receiving apparatus according to the sixth embodiment. In FIG. 11, an operation unit 13 is provided. As the operation unit 13, for example, a key input, a remote control input, or a touch panel having a display function is assumed. The receiving apparatus according to the present embodiment can select whether or not to select a different frequency band based on the switching history stored in the storage unit 8.

  Next, the operation of the frequency band switching process in the control unit 7 of the receiving apparatus 1 will be described with reference to FIG. In FIG. 12, when the switching reception mode is selected, the subsequent processes are the same as those in FIGS. 2, 4, 6, 8, and 10.

  In the start process S1, the control unit 7 waits for an input from the operation unit. Next, in switching mode ON step S11, when the user selects the switching mode through the operation unit, the control unit 7 selects the switching mode. When the switching mode is ON, the switching valid step S12 is performed, and the control unit 7 validates the switching of the frequency band based on the switching history or the switching list. Same as 4 and 5. On the other hand, when the switching mode is OFF, the switching invalidation step S13 is performed, and the subsequent control unit 7 does not perform the switching process of the frequency band based on the switching history or the switching list in the switching process.

  In this way, it is possible to select ON / OFF of the switching history or the switching list mode in advance according to the user's intention. As a result, in the case of movement in the action range in which the switching history or the switching list is valid, mode ON is selected. Otherwise, mode OFF is selected for movement such as travel that is performed at a low frequency. By doing so, unnecessary frequency band switching can be prevented.

  The receiving apparatus of the present invention can select an appropriate switching destination frequency band according to the user's behavior characteristics based on the switching history during frequency band switching processing in a certain program broadcast, and can shorten the switching time. It can be used in mobiles such as televisions and radios that receive broadcasts installed in mobile phones and mobile terminals.

Block diagram of receiving apparatus in embodiment 1 of the present invention Flowchart of operation of receiving apparatus in embodiment 1 of the present invention The block diagram of the receiver in Embodiment 2 of this invention Flowchart of operation of receiving apparatus in embodiment 2 of the present invention The block diagram of the receiver in Embodiment 3 of this invention Flowchart of operation of receiving apparatus in embodiment 3 of the present invention The block diagram of the receiver in Embodiment 4 of this invention Flowchart of operation of receiving apparatus in embodiment 4 of the present invention Block diagram of receiving apparatus in embodiment 5 of the present invention Flowchart of operation of receiving apparatus in embodiment 5 of the present invention Block diagram of receiving apparatus in embodiment 6 of the present invention Flowchart of operation of receiving apparatus in embodiment 6 of the present invention. Block diagram of conventional receiver

Explanation of symbols

1 Receiving Device 2 Antenna 3 Receiving Unit 7 Control Unit 8 Storage Unit

Claims (6)

A receiving device including a receiving unit that switches and receives the same program broadcast that is broadcast in different frequency bands in different areas,
A storage unit for storing a switching history of the frequency band of the program broadcast in the reception unit;
And a control unit that, when moving from one area to another area, the receiving unit switches and receives the program broadcast of a different frequency band based on the switching history stored in the storage unit. apparatus. A reception quality detection unit for detecting reception quality of the program broadcast received by the reception unit;
The control unit, when the reception quality detected by the reception quality detection unit becomes a predetermined level or less, based on the switching history stored in the storage unit, the program broadcast of a different frequency band to the reception unit The receiving device according to claim 1, wherein switching reception is performed. A position information detecting unit for detecting position information of the receiving device;
When the position information detection unit detects that the reception device moves from one area to another area, the control unit detects a different frequency band from the reception unit based on the switching history stored in the storage unit. The receiving device according to claim 1, wherein the program broadcast is switched and received. A time holding unit for holding time information;
The storage unit stores the time information from the time holding unit as the switching history of the program broadcast,
The control unit causes the reception unit to switch and receive the program broadcast of a different frequency band based on the time information stored in the storage unit when the reception device moves from one area to another area. Item 4. The receiving device according to Item 1. From the switching history stored in the storage unit, creating a switching list in which switching destinations are arranged in order of switching frequency, and having a calculation unit that stores the switching list in the storage unit,
The control unit causes the receiving unit to switch and receive the program broadcast of a different frequency band based on the switching list stored in the storage unit when the receiving device moves from one area to another area. Item 4. The receiving device according to Item 1. The receiving device according to claim 1, wherein the control unit can select whether to cause the receiving unit to switch and receive the program broadcast of a different frequency band based on the switching history stored in the storage unit. .

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