JP2007129629A - Radio wave receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio wave receiver capable of easily grasping receivable broadcast. <P>SOLUTION: The radio wave receiver to be equipped on a vehicle outputs video and audio information based on reception signals received by a first receiver 1 for receiving first broadcast or a second receiver 2 for receiving second broadcast, to output sections 6, 7. The receiver is provided with a first measuring means for measuring the radio wave received by the first receiver 1; a first determining section for determining whether the first receiver 1 can receive the first broadcast, based on a measuring result by the measuring means; a second measuring means for measuring the radio wave received by the second receiver 2; a second determining means for determining whether the second receiver 2 can receive the second broadcast, based on a measuring result by the second measuring means; and a display control means for displaying a symbol indicating receivable broadcast, among the first and second broadcasts in the output sections 6, 7 based on the results of determination by the first and second determining means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio wave receiving apparatus that is mounted on a vehicle and includes a first receiving unit that receives a first broadcast and a second receiving unit that receives a second broadcast.

  A hybrid receiver capable of receiving two or more broadcasts such as a fixed receiver digital broadcast and an analog broadcast, a fixed receiver digital broadcast, and a mobile digital broadcast has been developed (for example, see Patent Document 1). In such a hybrid receiver, one broadcast is selected from two or more broadcasts, and video information and audio information related to the selected one broadcast are output to an output unit such as a display unit or a speaker. Here, as means for selecting one broadcast from two or more broadcasts, a method manually performed by the user himself and a method automatically performed by the receiver have been proposed.

JP 2004-356703 A

  By the way, as described above, regardless of whether the user selects manually or the receiver automatically selects, whether or not each broadcast radio wave can be received, and which broadcast radio wave is received. It is necessary to grasp whether the quality is good.

  The subject of this invention is providing the radio wave receiver which can grasp | ascertain easily the broadcast which can be received.

  The radio wave receiving apparatus according to claim 1, wherein the video information based on the received signal received by any one of the first receiving unit that receives the first broadcast and the second receiving unit that receives the second broadcast; Based on the measurement result by the 1st measurement means which outputs audio | voice information to an output part, and measures the electromagnetic wave received by the 1st reception part in the radio wave receiver mounted in a vehicle. A first determination unit that determines whether or not the first broadcast can be received by the first reception unit; a second measurement unit that measures the radio wave received by the second reception unit; A second determination unit that determines whether or not the second receiver can receive the second broadcast based on the measurement result of the first measurement unit, and the determination by the first determination unit and the second determination unit Based on the result, the first broadcast and the second broadcast in the output unit Characterized in that it comprises a display control unit for displaying symbols indicating a receivable broadcast medium.

  According to the radio wave receiving apparatus of the first aspect, since the symbol indicating the receivable broadcast is displayed, the receivable broadcast can be easily grasped.

  The radio wave receiver according to claim 2 is determined that the first broadcast can be received by the first determination unit, and determined that the second broadcast can be received by the second determination unit. A comparison means for comparing the measurement result by the first measurement means and the measurement result by the second measurement means, and the display control means includes a symbol indicating the first broadcast based on the comparison result by the comparison means, and Symbols indicating the second broadcast are displayed in order of good reception status.

  According to the radio wave receiving apparatus according to the second aspect, since the symbols indicating the first broadcast and the symbols indicating the second broadcast are displayed in the order of the good reception state, the broadcast with the good reception state can be easily grasped. be able to.

  The radio wave receiving apparatus according to claim 3 displays a symbol so that the display control means can identify whether the video information and audio information output to the output unit is the first broadcast or the second broadcast. It is characterized by that.

  According to the radio wave receiving apparatus of the third aspect, it is possible to easily grasp whether the video information and audio information output to the output unit is the first broadcast or the second broadcast.

  Further, the radio wave receiving apparatus according to claim 4 outputs the video information and the audio information from the output unit by selecting a symbol indicating the first broadcast or a symbol indicating the second broadcast. Alternatively, a selection means for selecting the second broadcast is provided.

  According to the radio wave receiving apparatus of the fourth aspect, since the selection means for selecting the symbol indicating the first broadcast or the symbol indicating the second broadcast is provided, the video information and audio information of the receivable broadcast can be obtained. It can be output easily.

  The radio wave receiver according to claim 5 is characterized in that the first broadcast is a mobile digital broadcast, and the second broadcast is a fixed receiver digital broadcast.

  The radio wave receiver according to claim 6 is characterized in that the first broadcast is an analog broadcast and the second broadcast is a digital broadcast for a fixed receiving station.

  According to the radio wave receiving apparatus of the present invention, since a symbol indicating a receivable broadcast is displayed, it is possible to easily grasp a receivable broadcast while the vehicle is parked or stopped. In addition, since the symbols indicating the first broadcast and the symbols indicating the second broadcast are displayed in the order of the good reception status, it is possible to easily grasp the broadcast with the good reception status while the vehicle is parked or stopped. Also, in order to display a symbol that can identify whether the video information and audio information output to the output unit is the first broadcast or the second broadcast, the signal is output to the output unit while the vehicle is parked or stopped. It can be easily ascertained whether the video information and audio information being recorded are the first broadcast or the second broadcast.

  A radio wave receiver according to an embodiment of the present invention will be described below with reference to the drawings. The radio wave receiving apparatus according to this embodiment is mounted on a vehicle. FIG. 1 is a block diagram illustrating a configuration of the radio wave receiver according to the embodiment. As shown in FIG. 1, the radio wave receiving apparatus includes a first antenna 1A and a second antenna 2A. The first antenna 1A is configured to receive radio waves for analog TV broadcasting (first broadcasting), and the second antenna 2A is radio waves for digital TV broadcasting (second broadcasting) for fixed reception stations. It is configured to receive radio waves for mobile digital TV broadcast (first broadcast). Analog TV broadcast refers to, for example, terrestrial analog broadcast. Moreover, the digital TV broadcast for fixed reception stations indicates, for example, CS, BS, terrestrial digital broadcast, and the like. Moreover, the digital TV broadcast for mobile receiver stations indicates, for example, a digital broadcast for mobile phones.

  Further, the radio wave receiving apparatus includes a first radio wave processing unit 1 and a second radio wave processing unit 2. The first radio wave processing unit (first receiving unit) 1 receives an analog TV broadcast radio wave from the first antenna 1A, and outputs video information and audio information. The second radio wave processing unit (first receiving unit or second receiving unit) 2 receives radio waves of the fixed receiving station digital TV broadcast and the mobile digital TV broadcast from the second antenna 2A. Video information and audio information are output.

  As shown in FIG. 1, the first radio wave processing unit 1 includes a first channel selection unit 11 and a first demodulation unit 12. The first channel selection unit 11 selects and receives radio waves of a required channel for analog TV broadcasting from radio waves received by the first antenna 1A. The first demodulator 12 has a function of demodulating the received radio wave from the first channel selector 11 and outputting a video signal and an audio signal of analog TV broadcasting.

  Further, the second radio wave processing unit 2 includes a second channel selection unit 21, a second demodulation unit 22, a signal processing unit 23, and a decoding unit 24. The second channel selection unit 21 receives radio waves of required channels of the fixed receiver digital TV broadcast and the mobile digital TV broadcast from the radio waves received by the second antenna 2A. The second demodulator 22 has a function of demodulating the received radio wave from the second channel selector 21 and outputting a digital signal. The signal processing unit 23 has a function of performing necessary digital signal processing such as interleaving and error correction. The decoding unit 24 has a function of decoding the digital signal processed by the signal processing unit 23.

  Further, this radio wave receiving apparatus includes a control unit 3 that performs overall control in the radio wave receiving apparatus. A switching unit 4 is connected to the control unit 3, and the switching unit 4 acquires video information and audio information from each of the first and second radio wave processing units 1 and 2. Based on a control signal described later from the control unit 3, the switching unit 4 is an analog TV broadcast, a fixed reception station digital TV broadcast or a movement output from the first radio wave processing unit 1 or the second radio wave processing unit 2. The video information of the body digital TV broadcast is output to the display unit (output unit) 6, and the audio information is output to the speaker (output unit) 7. That is, FIG. 2 is a diagram showing the configuration of the display screen of the display unit 6. The analog TV broadcast, the fixed reception station digital TV broadcast or the mobile digital signal output from the switching unit 4 on the screen 6 a shown in FIG. TV broadcast video information is displayed.

  In addition, the control unit (first measurement unit and first determination unit) 3 is an electric field strength (hereinafter, referred to as a first electric field strength) that is the strength of the received radio wave processed by the first radio wave processing unit 1. ) Is measured, and it is determined whether or not the analog TV broadcast is receivable based on the measured first electric field strength.

  In addition, the control unit (second measuring unit and second determining unit) 3 is a bit error rate (BER, hereinafter referred to as a first BER) of the fixed receiving station digital TV broadcast after being decoded by the decoding unit 24. .) Is measured, and it is determined whether or not the digital TV broadcast for fixed receiving stations is receivable based on the measured first BER.

  In addition, the control unit (first measurement unit and first determination unit) 3 measures the BER of the mobile digital TV broadcast after being decoded by the decoding unit 24 (hereinafter referred to as a second BER). Then, it is determined whether or not the mobile digital TV broadcast can be received based on the measured second BER.

  Based on the determination result, the control unit (display control unit) 3 displays a symbol mark indicating a receivable broadcast among the analog TV broadcast and the digital TV broadcast on the display unit (output unit) 6. When it is determined that two or more broadcasts are receivable, the control unit 3 controls the first electric field strength and the electric field strength that is the strength of the received radio wave processed by the second radio wave processing unit 2 ( Hereinafter, the first electric field strength is compared with the first BER and the second BER, and the symbol marks are displayed in the order of good reception based on the comparison result. For example, it is determined that analog TV broadcasting, digital TV broadcasting for a fixed receiving station, and digital TV broadcasting for a mobile body can be received, and the receiving state is in the order of digital TV broadcasting for a fixed receiving station, digital TV broadcasting for a mobile body, and analog TV broadcasting. Is good.

  In this case, as shown in FIG. 2, a symbol mark (for example, “fixed digital”) 6b indicating a digital TV broadcast for a fixed receiving station having the best reception state is displayed on the leftmost side of the screen. In addition, a symbol mark (for example, “transfer digital”) 6c indicating a mobile TV broadcast with the second best reception state is displayed second from the left side of the screen, and the reception state is the third, that is, the worst analog TV. A symbol mark (for example, “analog”) 6d indicating broadcast is displayed third (rightmost) from the left side of the screen.

  In addition, the control unit 3 is configured so that the video information currently displayed on the screen 6a of the display unit 6 and the audio information output from the speaker 7 are analog TV broadcast, digital TV broadcast for fixed reception station, or digital TV for mobile object. The display unit 6 can identify which of the broadcasts is made. For example, as shown in FIG. 2, when video information and audio information of a digital TV broadcast for a fixed receiving station are output from the screen 6a and the speaker 7, a frame 8 is displayed on the symbol mark "fixed digital" 6b. It should be noted that the symbol mark “solid digital” 6b may be made identifiable by making it different from the colors of the other symbol marks 6c and 6d. May be displayed.

  The display unit 6 includes a touch panel input device that can be operated by pressing the symbol marks 6b to 6d with a finger or the like. When the control unit 3 acquires a signal indicating that any one of the symbol marks 6b to 6d displayed on the display unit 6 has been pressed (selected), the control unit 3 selects the broadcast indicated by the selected symbol mark. The control signal is output to the switching unit 4.

  FIG. 3 is a diagram showing the display content of the display 6 after any one of the symbol marks 6b to 6d is selected. As shown in FIG. 3, for example, after the symbol mark 6b is selected, marks 9a to 9h indicating channels of the digital TV broadcast for fixed reception stations indicated by the symbol mark 6b are displayed. Similarly to the symbol marks 6b to 6d, the channels indicated by the marks 9a to 9h can be selected by pressing the marks 9a to 9h with a finger or the like. When the control unit 3 acquires a signal indicating that any one of the marks 9a to 9h displayed on the display unit 6 has been selected, the control unit 3 outputs a control signal indicating that the channel indicated by the selected mark is to be selected. Is output to the channel selection unit 21. Similarly, even after the symbol marks 6c and 6d are selected, marks indicating the channels of the broadcasts indicated by the symbol marks 6c and 6d are displayed, and the channel is selected by selecting the displayed mark. . If the symbol mark 6d is selected and the mark indicating the analog TV broadcast channel indicated by the symbol mark 6d is selected, the control unit 3 outputs a control signal to the first channel selection unit 11.

  Next, referring to the flowchart shown in FIG. 4, symbols indicating broadcasts that can be received in the analog TV broadcast, the fixed receiver digital TV broadcast, and the mobile digital TV broadcast in the radio wave receiver according to the embodiment. The mark display method will be specifically described.

  First, the control unit 3 measures the electric field strength (first electric field strength) indicating the strength of the received radio wave processed by the first radio wave processing unit 1 (step S10, first measurement means). Next, the control unit 3 determines whether or not the analog TV broadcast can be received based on the first electric field strength measured in step S10 (step S11, first determination unit). That is, when the first electric field strength is high enough to be received, it is determined that the analog TV broadcast is receivable, and when the first electric field strength is low enough to be unreceivable, the analog TV broadcast is It is determined that reception is not possible.

  When it is determined in step S11 that the analog TV broadcast can be received, the control unit 3 determines to display the first symbol mark 6d indicating that the analog TV broadcast can be received on the display unit 6. (Step S12). If it is determined in step S11 that the analog TV broadcast cannot be received, the first symbol mark 6d is not displayed.

  Next, the control unit 3 measures the electric field strength (second electric field strength) indicating the strength of the received radio wave processed by the second radio wave processing unit 2 (step S13, second measuring means) and decodes it. The BER (first BER) of the received digital signal for fixed reception station digital TV broadcasting after being decoded by the unit 24 is measured (step S14, second measuring means). Next, the control unit 3 determines whether or not the fixed reception station digital TV broadcast is receivable based on the first BER measured in step S14 (step S15, second determination unit). .

  That is, when the first BER is small enough to be received, it is determined that the fixed receiving station digital TV broadcast is receivable. If the first BER is so large that it cannot be received, it is determined that the digital TV broadcast for the fixed receiving station cannot be received.

  When it is determined in step S15 that the fixed reception station digital TV broadcast is receivable, the control unit 3 displays a second symbol mark 6b indicating that the fixed reception station digital TV broadcast is receivable. 6 is determined to be displayed (step S16). If it is determined in step S15 that the fixed reception station digital TV broadcast cannot be received, the second symbol mark 6b is not displayed.

  Next, the control unit 3 measures the BER (second BER) of the received digital signal for mobile digital TV broadcasting after being decoded by the decoding unit 24 (step S17, first measuring means). . Next, the control unit 3 determines whether the mobile digital TV broadcast is receivable based on the second BER measured in step S17 (step S18, second determination unit).

  That is, when the second BER is small enough to be received, it is determined that the mobile digital TV broadcast can be received. If the second BER is not large enough to be received, it is determined that the mobile digital TV broadcast cannot be received.

  If it is determined in step S18 that the mobile digital TV broadcast can be received, the control unit 3 displays a third symbol mark 6c on the display unit 6 indicating that the mobile digital TV broadcast can be received. It is decided to display (step S19). If it is determined in step S18 that the mobile digital TV broadcast cannot be received, the third symbol mark 6c is not displayed.

  Next, the control unit 3 determines whether or not two or more symbol marks among the first to third symbol marks 6b to 6d are determined to be displayed (step S20). When it is determined that two or more symbol marks are determined to be displayed, the measured values (electric field strength and BER) of each broadcast indicated by the symbol marks to be displayed are compared (step S21, Comparison means). For example, when it is determined that the first to third symbol marks 6b to 6d are displayed, first, the first electric field strength and the second electric field strength are compared, and an analog TV broadcast or digital signal is based on the comparison result. A broadcast having a good reception state is determined by TV broadcast (for fixed reception stations and mobile objects).

  Specifically, when the first electric field strength is greater than the second electric field strength, it is determined that the reception state of the analog TV broadcast is better than that of the digital TV broadcast. That is, it is determined that the analog TV broadcast can display video on the display unit 6 with higher quality than the digital TV broadcast, and the speaker 7 can output audio with higher quality than the digital TV broadcast. Further, when the second electric field strength is higher than the first electric field strength, it is determined that the reception state of the digital TV broadcast is better than that of the analog TV broadcast. That is, it is determined that the digital TV broadcast can display video on the display unit 6 with higher quality than the analog TV broadcast, and the speaker 7 can output audio with higher quality than the analog TV broadcast.

  Next, the first BER is compared with the second BER, and based on the comparison result, a broadcast having a good reception state in the fixed reception station digital TV broadcast or the mobile digital TV broadcast is determined. Specifically, when the first BER is smaller than the second BER, it is determined that the reception state of the digital TV broadcast for fixed reception stations is better than that of the mobile digital TV broadcast. That is, the fixed receiving station digital TV broadcast can display video on the display unit 6 with higher quality than the mobile digital TV broadcast, and the speaker 7 can output audio with higher quality than the mobile digital TV broadcast. Determined. Further, when the second BER is smaller than the first BER, it is determined that the mobile digital TV broadcast has a better reception state than the fixed reception station digital TV broadcast. In other words, the mobile digital TV broadcast can display video on the display unit 6 with a higher quality than the fixed reception station digital TV broadcast, and the speaker 7 can output the audio with a higher quality than the fixed reception station digital TV broadcast. Is determined.

  Next, the control part 3 determines the order of the symbol mark displayed on the display part 6 based on the result compared in step S21 (step S22). For example, it is determined that the first to third symbol marks 6b to 6d are displayed, and the reception state is favorable in the order of digital TV broadcasting for fixed reception stations, digital TV broadcasting for mobile objects, and analog TV broadcasting. To do. In this case, as shown in FIG. 2, in order from the left side of the screen, the second symbol mark 6b indicating the fixed reception station digital TV broadcast in the best reception state, and the third symbol indicating the mobile digital TV broadcast. Symbol mark 6c and a first symbol mark 6d indicating analog TV broadcasting are displayed (step S23).

  Next, the control unit 3 determines that the video information currently displayed on the screen 6a of the display unit 6 and the audio information output from the speaker 7 are analog TV broadcast, digital TV broadcast for fixed reception station, or digital for mobile unit. Which of the TV broadcasts can be identified on the display unit 6 (step S24). That is, as shown in FIG. 2, when video information and audio information of the digital TV broadcast for fixed reception stations are output from the screen 6a and the speaker 7, a frame 8 is displayed on the first symbol mark 6b.

  2 shows the display content of the display unit 6 when analog TV broadcast, fixed receiver digital TV broadcast, and mobile digital TV broadcast can be received. For example, analog TV broadcast and fixed FIG. 5 shows the display content of the display unit 6 when the receiving station digital TV broadcast can be received and the mobile digital TV broadcast cannot be received.

  In FIG. 5, in order from the left side of the screen, a first symbol mark 6d indicating analog broadcasting and a second symbol mark 6b indicating digital TV broadcasting for fixed reception stations are displayed. That is, it shows that the reception state of the analog broadcast is better than that of the digital TV broadcast for the fixed receiving station. In FIG. 5, a frame 8 surrounding the first symbol mark 6d is displayed. That is, the video information currently displayed on the screen 6a and the audio information output from the speaker 7 are analog TV broadcasts.

  FIG. 6 shows a case where, for example, only a digital TV broadcast for a fixed receiving station can be received, and the video information displayed on the screen 6a and the audio information output from the speaker 7 are digital TV broadcasts for mobile objects. The display content of the display unit 6 in FIG. A second symbol mark 6b indicating the digital TV broadcast for the fixed receiving station and a third symbol mark 6c indicating the mobile digital TV broadcast surrounded by the frame 8 are displayed, but the third symbol mark 6c is displayed. Is displayed so that selection by the touch panel input device cannot be performed. That is, only the second symbol mark 6b can be selected.

  According to the radio wave receiving apparatus according to this embodiment, since the first to third symbol marks indicating receivable broadcasts are displayed, it is possible to easily grasp the receivable broadcasts while the vehicle is parked or stopped. . In addition, when there are two or more receivable broadcasts, the reception states are displayed in the order of good reception, so that it is possible to easily grasp broadcasts with good reception state while the vehicle is parked or stopped. In addition, since the video information displayed on the display unit and the audio information output from the speaker can be identified, the video information and speaker displayed on the display unit while the vehicle is parked or stopped. It is possible to easily grasp which broadcast the audio information output from is.

  The radio wave receiving apparatus according to this embodiment is configured to be able to receive analog TV broadcasts, fixed receiver digital TV broadcasts, and mobile digital TV broadcasts, but only two broadcasts. You may comprise so that it can receive. For example, only the analog TV broadcast and the digital TV broadcast for the fixed reception station, or only the digital TV broadcast for the fixed reception station and the digital TV broadcast for the mobile unit may be received.

It is a block diagram which shows the structure of the electromagnetic wave receiver concerning Embodiment. It is a figure which shows the display content of the display part concerning embodiment. It is a figure which shows the display content of the display part concerning embodiment. It is a flowchart for demonstrating the selection method in the electromagnetic wave receiver concerning embodiment. It is a figure which shows the display content of the display part concerning embodiment. It is a figure which shows the display content of the display part concerning embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 1st radio wave processing part, 2 ... 2nd radio wave processing part, 1A ... 1st antenna, 2A ... 2nd antenna, 3 ... Control part, 4 ... Switching part, 6 ... Display part, 7 ... Speaker , 11 ... 1st channel selection part, 12 ... 1st demodulation part, 21 ... 2nd channel selection part, 22 ... 2nd demodulation part, 23 ... Signal processing part, 24 ... Decoding part.

Claims (6)

Video information and audio information based on the received signal received by the first receiving unit that receives the first broadcast or the second receiving unit that receives the second broadcast is output to the output unit and mounted on the vehicle. In the radio wave receiver,
First measuring means for measuring radio waves received by the first receiving unit;
First determination means for determining whether or not the first broadcast can be received by the first reception unit based on a measurement result by the first measurement means;
Second measuring means for measuring radio waves received by the second receiving unit;
Second discriminating means for discriminating whether or not the second broadcast can be received by the second receiving unit based on a measurement result by the second measuring unit;
A display for displaying a symbol indicating a receivable broadcast among the first broadcast and the second broadcast in the output unit based on a determination result by the first determination unit and the second determination unit. Control means;
A radio wave receiving apparatus comprising: When it is determined that the first broadcast is receivable by the first determining means and the second broadcast is determined to be receivable by the second determining means,
Comparing means for comparing the measurement result by the first measurement means and the measurement result by the second measurement means,
The display control means displays the symbols indicating the first broadcast and the symbols indicating the second broadcast in the order of good reception based on the comparison result by the comparison means. The radio wave receiver according to 1.   The display control means displays the symbol so that it is possible to identify whether the video information and the audio information output to the output unit are the first broadcast or the second broadcast. The radio wave receiver according to claim 1 or 2.   The first broadcast or the second broadcast that outputs the video information and the audio information from the output unit by selecting a symbol indicating the first broadcast or a symbol indicating the second broadcast. The radio wave receiving apparatus according to claim 1, further comprising selection means for performing selection.   The radio wave reception according to any one of claims 1 to 4, wherein the first broadcast is a mobile digital broadcast, and the second broadcast is a fixed reception station digital broadcast. apparatus.   5. The radio wave receiving apparatus according to claim 1, wherein the first broadcast is an analog broadcast, and the second broadcast is a digital broadcast for a fixed receiving station.

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