JP4817869B2 - Broadcast receiver - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that receives broadcast radio waves in a mobile body such as a car TV and a car radio, and in particular, stores frequency information of a broadcast station as preset information for each of a plurality of broadcast areas, When it is detected that the mobile body has moved to another broadcast area, the channel selection operation is performed in the broadcast receiving apparatus that reads and selects preset information of the broadcast area based on the current position information. The present invention relates to a broadcast receiving apparatus that determines a reception frequency based on immediately preceding preset information when a return operation is performed.

  In recent years, electronic devices have been reduced in size and price, and various electronic devices have been installed in automobiles. For example, various devices such as broadcast receivers such as car radios and car televisions, audio / video devices such as MD / DVD players, and car navigation devices are installed and used in many automobiles.

  2. Description of the Related Art Conventionally, as a tuner of a broadcast receiving apparatus, a preset type tuner in which a reception frequency is stored in a memory in advance and a reception broadcast station can be selected with a single touch by pressing a channel selection button has been widely used. Such a broadcast receiving apparatus may not be able to receive a preset frequency broadcast as the vehicle moves. For this reason, there is a function called auto-preset that automatically searches for radio waves that can be received at the location by pressing a preset button and stores the frequency in a preset memory.

  However, a broadcast receiving apparatus having an auto preset function has a problem that it takes several seconds to search for a receivable radio wave. In order to solve such problems, for example, broadcast receiving apparatuses disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 7-202641) and Patent Document 2 (Japanese Patent Laid-Open No. 9-135184) are known.

  The broadcast receiving device disclosed in Patent Document 1 stores, in a memory, the frequencies of each broadcasting station to be preset for each of a plurality of broadcast areas, and the current GPS reception unit of the car navigation device currently stores the frequency. The position information is acquired, and when moving, the frequency of each broadcasting station in the area corresponding to the current position is read from the memory and stored in the preset memory.

Further, the broadcast receiving device disclosed in Patent Document 2 reads out the transmission power data and the transmission frequency stored in advance in the own vehicle position calculation means and the map / broadcast station data storage unit, and the absolute position of each broadcast station and the own vehicle is read out. Computation means for calculating the received electric field strength from the distance between the position data (current position) and a microcomputer. The microcomputer automatically presets the broadcast station data of the receiving frequency in the order of strong electric field strength in a certain area. The broadcast stations are stored in the designated storage area of the memory, and the broadcasting stations are set in the order of the electric field intensity by operating the operation unit. As a result, a broadcast station that can be received with the best sensitivity in the area can be called instantly by the operation of the operation unit.
JP-A-7-202641 JP-A-9-135184

  By the way, in the broadcast receiving apparatus, in the vicinity of the boundary between two broadcast areas, the reception state of the radio waves of the stations in either area tends to be unstable. In particular, when an automobile travels in a mountainous area, the radio wave state changes remarkably, for example, the radio wave is blocked by the mountain. Therefore, even if the presets are replaced as in the broadcast receiving device disclosed in Patent Document 1, the broadcast (radio wave) of the station that was received before the new broadcast (radio wave) of the new station with traveling is better. It may happen that the reception state is improved.

  In such a case, in the broadcast receiving apparatus disclosed in Patent Literature 1 and Patent Literature 2, the radio wave of the previously received station is from a new station that has a poor radio wave condition although the radio wave condition is good. There was a problem that it would continue to receive the broadcast.

  As a result of various studies to solve the above problems, the inventor of the present application stores the frequency information of the broadcasting station as preset information for each of a plurality of broadcasting areas, and the moving body is moved to another broadcasting area. When it is detected that the mobile station has moved, in the broadcast receiving apparatus that reads out the preset information of the broadcast area and selects a channel based on the current position information, a return operation is performed after the channel selection operation. At this time, the inventors have conceived that the above problem can be solved if the reception frequency is determined based on the immediately preceding preset information, and the present invention has been completed.

  That is, the present invention has an object to solve the above-mentioned problems, and even when moving, even if it is out of the broadcasting area so far, it is possible to easily receive in the current broadcasting area and switch the receiving station. However, it is an object of the present invention to provide a broadcast receiving apparatus that can return to the previous preset and easily return to the previously received station when the reception state is not improved.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
A broadcast receiving device for receiving broadcast radio waves in a mobile body, preset information storage means for storing frequency information of a broadcast station as preset information for each of a plurality of broadcast areas, and a current position for detecting a current position of the mobile body When it is detected by the detection means and the current position detection means that the mobile body has moved to another broadcast area, the broadcast is received from the preset information storage means based on the current position information obtained by the current position detection means. and preset means for storing the preset memory reads preset information area, and channel selection means for determining the reception frequency based on the preset information stored as channel selection buttons are operations in the preset memory, said channel selection Receiving means for receiving the frequency determined by the means,
When the channel selection button is operated again after the channel selection button is operated, the channel selection unit determines a reception frequency based on the channel selection button and immediately preceding preset information, and the reception unit is The frequency selected by the channel selection means is received.

The invention according to claim 2 of the present application is the broadcast receiving apparatus according to claim 1, wherein the channel selection means operates the channel selection button within a predetermined time after the channel selection button is operated. In this case, the reception frequency is determined based on the channel selection button and the immediately preceding preset information .

The invention according to claim 3 of the present invention, in the broadcast receiving apparatus according to claim 1 or claim 2, the operation of the channel selection button, characterized in that it is a depression of the channel selection button.

  The broadcast receiving apparatus of the present invention has the following effects.

That is, in the invention according to claim 1, when it is detected that the moving body has moved to another broadcast area, the preset information storage means is based on the current position information obtained by the current position detection means by the preset means. The preset information of the broadcast area is read out and stored in the preset memory, and when the channel selection means is operated again after the channel selection button is operated , the channel selection button and the immediately preceding channel are selected. It was to determine the reception frequency on the basis of the preset information.

As a result, when moving, it is possible to receive the broadcast in the current broadcast area even if it is out of the previous broadcast area, and if the reception status does not improve even after switching to the broadcast in the current broadcast area, It will be possible to easily return to the broadcast that was being received. Further, since the preset is returned to the previous state by the operation of the channel selection button again, it is not necessary to provide a separate button for the return operation.

Further, in the invention according to claim 2, in the broadcast receiving apparatus according to claim 1, when the channel selection means is operated within a predetermined time after the channel selection button is operated, The reception frequency is determined based on the channel selection button and the immediately preceding preset information .

The invention according to claim 3, in the broadcast receiving apparatus according to claim 1 or 2, the operation of the channel selection button is a depression of the channel selection button.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment shown below exemplifies an embodiment for embodying the technical idea of the present invention, and is not intended to specify the present invention to this embodiment. It is equally applicable to other embodiments within the scope of the claims.

  FIG. 1 is a block diagram showing an overall configuration including a broadcast receiving device and peripheral devices of the present invention. Here, a case where a terrestrial digital television broadcast is received by a mobile body such as an automobile will be described as an example. The terrestrial digital broadcast signal caught by the antenna 3 is received by the broadcast receiver 1, and the video is displayed on the monitor 5.

  On the other hand, the GPS signal received by the GPS antenna 4 is given to the car navigation system 2, and the current position information is displayed on the monitor 5. The broadcast receiving apparatus 1 and the car navigation system 2 are connected via an external interface, and the current position information is provided to the broadcast receiving apparatus 1.

  FIG. 2 is a block diagram showing the configuration of the broadcast receiving apparatus 1 of the present invention. As shown in FIG. 2, the broadcast receiving apparatus 1 includes a current position detection unit 7, a preset information storage unit 8, a preset memory 9, an input unit 10, a control unit 11, a ROM 12, a RAM 13, a display unit 14, an audio output unit 15, and the like. It is prepared for.

  The control unit 11 includes a preset unit 11a, a channel selection unit 11b, and a timer 11c, and controls each unit of the broadcast receiving apparatus. The ROM 12 stores a control program used by the control unit 11, and the RAM 13 stores various data necessary for the control unit 11. The TV receiver 6 inputs the terrestrial digital television signal received by the antenna 3 to the controller 11. The display unit 14 processes the video signal generated from the terrestrial digital television signal by the control unit 11 and displays it on the monitor 5. The audio output unit 15 processes the audio signal generated from the terrestrial digital television signal by the control unit 11 and outputs it from a speaker (not shown).

  The current position detection unit 7 acquires position information from the car navigation system 2 and inputs the position information to the control unit 11. The preset information storage unit 8 stores and manages the frequency of each broadcast station to be preset for each area for all broadcast areas existing within the range in which the mobile object equipped with the broadcast receiving apparatus moves. The input unit 9 receives a channel selection input from preset channel selection buttons. The channel selection button may be a fixed type provided on the front surface of the periphery of the monitor 5 or a remote control type separate from the monitor 5.

  When it is detected that the mobile body has moved to another broadcast area, the preset unit 11a obtains preset information of the broadcast area from the preset information storage unit 8 based on the current position information obtained by the current position detection unit 7. Read out and store in the preset memory 9. The channel selection unit 11b determines the reception frequency based on the channel selection button and the preset information stored in the preset memory 9, but after the channel selection button is pressed, the same channel selection button is again displayed within a predetermined time. When pressed, the reception frequency is determined based on the previous preset information. The timer 11c starts timing when the channel selection button is pressed, and measures the time until the same channel selection button is pressed again.

  As described above, in the present embodiment, the channel selection unit 11b determines the reception frequency based on the channel selection button and the preset information stored in the preset memory 9, but after the channel selection button is pressed, When the same channel selection button is pressed again within a predetermined time, the reception frequency is determined based on the previous preset information, so it is easy to move away from the previous broadcast area while moving. Reception in the current broadcasting area becomes possible. Also, if the reception condition does not improve after switching the receiving station, you can easily return to the previous preset by operating the channel selection button again within a certain period of time, and return to the previously receiving station. It will be possible to return.

  The operation procedure of the broadcast receiving apparatus 1 as described above will be described in detail based on the flowchart of FIG. FIG. 3 is a flowchart showing the channel selection operation of the broadcast receiving apparatus 1 according to the embodiment of the present invention.

  First, the current position information is acquired from the car navigation system 2 through the current position detector 7 (step S1). Based on the acquired position information, it is determined whether or not the vehicle has moved to another broadcast area (step S2). The determination is made by comparing with the position information stored when the broadcast is received.

  If it is determined in step S2 that the vehicle has not moved to another broadcast area, the process returns to the current position acquisition process in step S1. If the vehicle has moved to another broadcast area, the preset unit 11a reads the preset information for the broadcast area corresponding to the new position information from the preset information storage unit 8 and stores it in the preset memory 9 (step S3). In the input unit 9, it is determined whether or not the channel selection button has been pressed (step S4).

  If it is determined in step S4 that the channel selection button has not been pressed, the process returns to step S1. When the channel selection button is pressed, the channel selection unit 11b starts the timer 11c (step S5) and receives a radio wave having a frequency corresponding to the pressed channel selection button (step S6).

  Thereafter, it is determined whether or not the timer 11c indicates that a predetermined time (for example, 1 second) has elapsed (step S8). If the timer 11c has elapsed, the reception is continued as it is, and the position information acquired in step S1 is stored in the memory. (Step S8), the timer 11c is reset (Step S11).

  If the predetermined time has not elapsed in step S7, it is determined whether or not the same channel selection button that has been pressed down again has been pressed (step S9). The frequency corresponding to the preset channel selection button is received (step S10), and the timer 11c is reset (step S11).

  By such a process, as described above, even if the user moves out of the broadcast area up to now while moving, reception in the current broadcast area can be easily performed. Also, if the reception condition does not improve even after switching the receiving station, you can easily return to the previous preset by operating the tuning button again within a certain period of time, and return to the previously receiving station. It will be possible to return.

  In the above-described embodiment, the channel selection button is described as a fixed type provided on the front surface of the periphery of the monitor 5 or a remote control type separate from the monitor 5, but is displayed on the monitor 5. A touch panel type tuning button can also be used. In this case, the channel selection button is operated after the channel selection button is displayed on the monitor 5.

  In the above embodiment, the case of terrestrial digital television has been described. However, the present invention is not limited to this, and can also be applied to terrestrial digital radio, analog television, and analog radio.

It is a block diagram which shows the whole structure containing the broadcast receiver of this invention, and a peripheral device. It is a block diagram which shows the structure of the broadcast receiver of this invention. It is a flowchart which shows the channel selection operation | movement of the broadcast receiver of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Broadcast receiving apparatus 2 ... Car navigation system 3 ... Antenna 4 ... GPS antenna 5 ... Monitor 6 ... TV receiving part 7 ... Current position detection part 8 ... Preset information storage part 9 ... Preset memory 10 ... Input part 11 ... Control part 12 ... ROM
13 ... RAM
14 ... Display unit 15 ... Audio output unit

Claims (3)

A broadcast receiving device for receiving broadcast radio waves in a mobile body, preset information storage means for storing frequency information of a broadcast station as preset information for each of a plurality of broadcast areas, and a current position for detecting a current position of the mobile body When it is detected by the detection means and the current position detection means that the mobile body has moved to another broadcast area, the broadcast is received from the preset information storage means based on the current position information obtained by the current position detection means. and preset means for storing the preset memory reads preset information area, and channel selection means for determining the reception frequency based on the preset information stored as channel selection buttons are operations in the preset memory, said channel selection Receiving means for receiving the frequency determined by the means,
When the channel selection button is operated again after the channel selection button is operated, the channel selection unit determines a reception frequency based on the channel selection button and immediately preceding preset information, and the reception unit is A broadcast receiving apparatus for receiving a frequency determined by the channel selection means. The channel selection means determines a reception frequency based on the channel selection button and the immediately preceding preset information when the channel selection button is operated within a predetermined time after the channel selection button is operated. The broadcast receiving apparatus according to claim 1. Operation of the channel selection button, the broadcast receiving apparatus according to claim 1 or 2, characterized in that the depression of the channel selection button.

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