JP2019186834A - Broadcast reception device and broadcast reception method - Google Patents

Abstract

To provide a broadcast reception device capable of easily improving defective reception by proposing an improvement method when the defective reception occurs.SOLUTION: The device comprises: a control unit 10 which receives, from a parabolic antenna 21 via a broadcast satellite 400, a broadcast wave transmitted from a transmission device 500, detects a reception state of the received broadcast wave and outputs an improvement method plan for improving the state to be satisfactory on the basis of a result of the detection; and a video processing unit 6 which outputs a video signal for displaying the result of the detection and the improvement method plan.SELECTED DRAWING: Figure 2

Description

  The present embodiment relates to a broadcast receiving apparatus and a broadcast receiving method.

  In television broadcasting, a receiver (broadcast receiving device) receives content of a broadcast program via a reception processing facility. The content of the broadcast program is conveyed from the reception processing facility to the broadcast receiving device using an IF signal (Intermediate Frequency). Here, the IF signal is a signal obtained by converting the frequency band of the broadcast wave received from the satellite broadcast by the reception signal processing facility into a predetermined intermediate frequency band.

  As for satellite broadcasting, the broadcasting system changes from BS analog broadcasting to BS digital / 110 ° CS digital broadcasting and 4K / 8K broadcasting (advanced broadband BS broadcasting and advanced broadband CS broadcast) according to the needs of the times, and diversifies. ing. These broadcasting systems have different IF signal frequency bands. Therefore, the broadcast receiving device may not be able to receive the content of the broadcast program unless it has a reception processing facility corresponding to each frequency band.

  In 4K / 8K broadcasting, which is scheduled to start in Japan in December 2018, left-handed circularly polarized waves will be used in December 2018 in order to achieve both effective use of frequencies and expansion of services. Is going to be. However, the broadcast receiving apparatus is not always connected to a receiving facility for acquiring a right-handed circularly polarized wave component and a left-handed circularly polarized wave component. When the broadcast receiving apparatus is connected to such a receiving facility, a broadcast wave reception failure occurs.

  As described above, when a new broadcasting technology or broadcasting system is introduced, a cause of reception failure may newly occur. However, the conventional broadcast receiving apparatus has a problem that when a reception failure occurs, the cause of the reception failure cannot be specified, and the improvement method is unclear.

JP 2010-74777 A JP 2004-32621 A

  An object of the present embodiment is to provide a broadcast receiving apparatus and a broadcast receiving method that can easily improve reception failure by proposing an improvement method when reception failure occurs. .

  The broadcast receiving apparatus of the present embodiment detects a reception state of a broadcast wave received from an antenna, and outputs a proposed improvement method for improving the state based on the detection result, the detection result, And a video signal output unit that outputs a video signal for displaying the proposed improvement method.

Schematic which shows an example of a broadcast system structure using the broadcast receiver concerning this embodiment. The block diagram which shows an example of a structure of the broadcast receiving apparatus which concerns on embodiment. The flowchart explaining an example of the detection procedure of a reception state. The flowchart explaining an example of the determination procedure of the improvement proposal content of a reception state. The table | surface explaining an example of the criterion of the improvement proposal of a receiving condition. The table | surface explaining an example of the criterion of the improvement proposal of a receiving condition. The figure explaining an example of the display screen of an improvement proposal.

  Hereinafter, embodiments will be described with reference to the drawings.

  A first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating a configuration of a broadcasting system 100 according to the present embodiment. The broadcast system 100 includes one or more transmission devices 500a, 500b, and 500c, a reception facility 200, and the broadcast reception device 1. Note that the number of transmission apparatuses 500a to 500c is not limited to three, and may be any number. In addition to conventional BS / CS / advanced narrowband CS broadcasts, transmission apparatuses 500a to 500c include transmission of advanced wideband BS broadcasts and advanced wideband CS broadcasts scheduled to start in Japan in December 2018. .

  The transmission devices 500a, 500b, and 500c are devices that transmit broadcast waves. The transmission devices 500a, 500b, and 500c transmit broadcast waves to the reception processing facility 300 via the broadcast transmission path 600. The transmission devices 500a, 500b, and 500c are installed for each broadcaster, for example.

  The broadcast transmission path 600 is a transmission path for simultaneously transmitting broadcast waves to an unspecified number of broadcast receiving apparatuses 1. Broadcast transmission path 600 is configured to include a relay device (not shown) mounted on broadcast satellite 400. Broadcast satellite 400 includes BS (Broadcasting Satellite) which is a broadcast satellite dedicated to broadcasting and CS (Communication Satellite) which is a communication satellite used for communication. Which of BS and CS is used is determined in advance according to the frequency band group.

  The relay device is a device that shifts the frequency of the broadcast wave received from the transmission device 500. In addition, the relay device receives a polarization wave in the right turn direction (right-handed circular polarization, right-handed polarization) or left-hand turn direction (left-handed circular polarization, left-handed polarization) as a broadcast wave received by the receiving facility 200. Device). Whether to use right-handed circularly polarized wave or left-handed circularly polarized wave is determined in advance according to the type of broadcast wave and the group of frequency bands.

  Note that a part of the broadcast transmission path 600 may include a communication line, for example, a communication line from the transmission device 500 to a transmission facility for transmitting radio waves.

  The reception facility 200 includes a reception processing facility 300, a booster 41, and a distributor 51.

  The reception processing facility 300 receives the broadcast wave transmitted from each transmission device 500 via the broadcast transmission path 600, and the conversion that generates an IF signal from the received signal from the broadcast wave received by the parabolic antenna 21. The unit 31 is configured.

  The reception processing facility 300 receives the broadcast wave transmitted by each transmission device 500 via the broadcast transmission path 600. The reception processing facility 300 converts the received broadcast wave into an IF signal. The reception processing equipment 300 outputs the converted IF signal to the broadcast receiving apparatus 1 via the booster 41 or the distributor 51, for example. Here, the booster 41 is a signal amplifier that amplifies and outputs an input signal. The booster 41 amplifies the input signal with a set gain and outputs the amplified signal. The booster 41 also has a tilt adjustment function for outputting the frequency characteristics flat. On the other hand, the booster 41 may cause nonlinear distortion in the output signal. The case where this distortion occurs is, for example, a case where the intensity of the input signal exceeds the allowable level of the booster 41. Or it is a case where the gain of the booster 41 is set high. The distributor 51 distributes the input high-frequency signal to a plurality of output signals while preventing impedance matching from being disturbed.

  Note that the reception processing facility 300 is installed in each home or business office. It may be installed for each facility such as a condominium or a building, or may be installed for each set of a plurality of facilities.

  The broadcast receiving apparatus 1 includes television receivers 1a and 1b, recorders 1c and 1d capable of recording a television broadcast, and the like. The television receivers 1a and 1b output video and audio included in program data based on the IF signal output by the reception processing facility 300. The broadcast receiving apparatus 1 is installed in each home or business office.

  In the present embodiment, the broadcast wave includes a right-turning polarization and a left-turning polarization. The broadcast receiving apparatus 1 determines the state of the received signal received from the antenna for the channel for each turning direction of the polarization included in the broadcast wave, and generates signal state information indicating the determination result. The broadcast receiving apparatus 1 acquires signal state information of a plurality of channels for one turning direction (for example, the left turning direction), and identifies a cause of poor reception of broadcast waves based on the acquired signal state information.

  Note that the broadcast receiving apparatus 1 includes both a device that can receive only polarization in the right turn direction and a device that can receive polarization in the left turn direction. If a receiver that can receive only polarized light in the right turn direction is located upstream from the own aircraft, even if the own device can receive polarization in the left turn direction, Waves are not transmitted. For example, when the broadcast receiving device 1c capable of receiving only the polarization in the right turn direction is disposed between the broadcast receiving device 1a capable of receiving the polarization in the left turn direction and the distributor 51, Since the polarization in the left turn direction is lost in the broadcast receiver 1c, it is not transmitted downstream. Therefore, the polarization in the left turn direction is not transmitted to the broadcast receiving device 1a. In order to avoid such signal loss, it is desirable to arrange the transmission network so that the broadcast receiving apparatus 1 is directly connected to the distributor 51 like the broadcast receiving apparatuses 1b and 1d.

  Next, as an example of the broadcast receiving apparatus 1, a configuration of a television receiver 1a that is a broadcast receiving apparatus will be described. FIG. 2 is a block diagram illustrating a configuration of the broadcast receiving apparatus according to the embodiment.

  The parabolic antenna 21 is planned as a BS / 110 ° CS satellite broadcast with a right-turn polarization and a 4K / 8K broadcast, and is transmitted with a left-turn polarization. The advanced broadband BS broadcast and the advanced broadband CS broadcast (hereinafter referred to as the advanced broadband broadcast) are received, and the current broadcast and the advanced broadband broadcast signal are transmitted to the broadcast receiving device 1 via the converter 31, the booster 41, and the distributor 51. This is supplied to the input terminal 2a. The current broadcast and the advanced broadband broadcast signal input to the input terminal 2a are supplied to the tuner unit Tu.

  The tuner unit Tu has a plurality of tuners Tu1, Tu2,... (Hereinafter referred to as tuner Tun). The tuner Tun is controlled by the control unit 10 to select a broadcast signal of a desired channel from the input current broadcast signal or advanced broadband broadcast signal, and the selected signal is sent to the signal processing unit 3. Output. The signal processing unit 3 demodulates the input broadcast signal.

  In the example of FIG. 2, only one parabola antenna 21 corresponding to one current broadcast and advanced wideband broadcast is shown, but an antenna corresponding to terrestrial digital broadcast, BS / 110 ° CS satellite broadcast, and advanced wideband BS / CS broadcast is shown. It is also possible to provide a signal from each antenna to the tuner unit Tu. In this case, the signal processing unit 3 performs demodulation corresponding to the modulation scheme of each broadcast. Thereby, the signal processing unit 3 obtains a stream of each broadcast signal. Note that FIG. 2 shows an example in which each broadcast signal is input via an antenna, but the transmission path of the broadcast signal is not particularly limited, and IP broadcasts received via the Internet line, not via the antenna, It may be received via a cable television broadcasting network.

  For example, for an advanced wideband broadcast signal, a TLV (Type Length Value) stream is obtained by demodulation of the signal processing unit 3. The signal processing unit 3 separates an IP packet included in the TLV stream, and includes video data, audio data, caption data, character superimposition, application data, an ECM (Entlement Control Message), and an EMM (Entlement Management Message) included in the IP packet. ) Are extracted.

  Further, the signal processing unit 3 extracts a transport stream (a transport stream multiplexed according to the MPEG-2 Systems standard) by a demodulation process for a current broadcast signal such as a terrestrial digital broadcast signal. The signal processing unit 3 extracts video data and audio data from the transport stream, and extracts various messages including ECM and EMM.

  The broadcast receiving apparatus 1 is provided with a CAS module 15. The CAS module 15 is used for controlling the conditional access system. The CAS module 15 may be configured to be mounted on a chip built in the broadcast receiving apparatus 1, or may be configured by a board in which the CAS module is incorporated, and is provided in a slot (not shown) provided in the broadcast receiving apparatus 1. It is also conceivable that the conditional access function is realized by inserting the board. In addition, the CAS module 15 has both the limited reception function of the advanced broadband broadcast and the limited reception function of the current broadcast, or has only the limited reception function of the advanced broadband broadcast. In some cases, it is realized by a CAS card as the IC card 23.

  The signal processing unit 3 performs decoding processing on the extracted video and audio of each broadcasting system, and then performs predetermined signal processing to obtain video data and audio data. The signal processing unit 3 gives video data and audio data to the graphic processing unit 4 or the audio processing unit 7, respectively, and gives other data to the control unit 10.

  The OSD signal generation unit 5 generates image information (OSD signal) for superimposing display based on the information given from the control unit 10 and supplies it to the graphic processing unit 4. The graphic processing unit 4 manages digital video data from the signal processing unit 3 and window drawing based on a GUI (Graphical User Interface) from the OSD signal generation unit 5, and broadcasts data on an image based on the video data. And an image based on GUI or the like are superimposed, and the superimposed image is sent to the video processing unit 6.

  For example, in addition to video data, the graphic processing unit 4 is provided with various data for acquiring a program, electronic program guide (EPG) information, program attribute information, subtitle information, and the like. Image generation processing can be performed to display EPG, subtitles, and the like based on the information.

  The video processing unit 6 serving as a video signal output unit is controlled by the control unit 10 so that the digital video signal from the graphic processing unit 4 can be displayed on the video display unit 8 in a format (number of pixels, frame frequency, scanning method). The image is converted or the display color is arbitrarily adjusted and output to the video display unit 8. Thereby, a video can be displayed on the display screen of the video display unit 8.

  The audio processing unit 7 converts the digital audio data from the signal processing unit 3 into an analog audio signal that can be reproduced by the speaker 9, and then outputs the analog audio signal to the speaker 9 to reproduce the audio. When the broadcast receiving apparatus is a set top box or the like, it is not necessary to include the video display unit 8 and the speaker 9.

  The broadcast receiving apparatus 1 is provided with a card interface (I / F) 13, a communication I / F 16, a USB I / F 17, and an HDMI I / F 18. The card I / F 13 enables transmission / reception of data between the IC card 23 mounted on the card holder 14 and the control unit 10. For example, when a CAS card (hereinafter referred to as a B-CAS card) corresponding to the current digital broadcast is adopted as the IC card 23, the card I / F 13 transmits / receives data related to the descrambling of the current broadcast.

  The communication I / F 16 is an interface corresponding to a predetermined communication path such as a telephone line or a LAN.

  The HDMI I / F 18 is an interface corresponding to the HDMI (registered trademark) standard, is connected to an external device (not shown) via the terminal 2d, receives an HDMI (registered trademark) signal from the external device, and receives a control unit. 10 or an HDMI (registered trademark) signal from the control unit 10 can be output to an external device via the terminal 2d.

  The USB I / F 17 is an interface compatible with the USB standard, and is connected to a USB compatible device such as the HDD 24 via the terminal 2 c to enable data transmission / reception between the USB compatible device and the control unit 10. For example, when the HDD 24 is connected to the terminal 2c, the control unit 10 can provide video data to the HDD 24 via the USB I / F 17 and the terminal 2c for recording.

  When the recording unit is configured by an HDD, an optical disc disk drive, an SD (registered trademark) card reader / writer, etc. (not shown) built in the broadcast receiving apparatus 1, the control unit 10 records a broadcast program signal in each of these recordings. It is also possible to record in the section.

  For example, when recording of a broadcast program is designated by the user, the control unit 10 transmits the program data (video and audio data) after descrambling acquired by the signal processing unit 3 to the HDD 24 via the USB I / F 17. Can be given to and recorded. The control unit 10 can execute recording of a broadcast program even in a standby state (function standby state).

  The broadcast receiving apparatus 1 is provided with an operation unit 11 and a receiving unit 12. The operation unit 11 includes switches, keys, buttons, and the like (not shown), and outputs an operation signal based on a user operation to the control unit 10. The receiving unit 12 receives an operation signal based on a user operation from the remote controller 22 and outputs the received operation signal to the control unit 10. The control unit 10 controls each unit of the reception device 1 based on operation signals from the operation unit 11 and the reception unit 12. For example, when an operation for designating a reception channel number is performed by the remote controller 22 using an up / down key, a one-touch channel selection key, or the like, each tuner Tun selects a channel according to an operation signal from the reception unit 12. Perform the action.

  The operation unit 11 and the remote controller 22 are provided with a power switch (not shown) for turning on / off the power of the broadcast receiving apparatus 1. The broadcast receiving apparatus 1 is provided with a power supply circuit (not shown) for supplying power to each unit, and the control unit 10 controls the power supply to each unit by operating a power switch, It is set to the state.

  In the standby state, at least the graphic processing unit 4, the OSD signal generation unit 5, the video processing unit 6, the audio processing unit 7, the video display unit 8 and the speaker 9 shown in FIG. However, the user cannot view the broadcast program. When this embodiment is applied to a decoder that receives advanced broadband broadcast and outputs video and audio, the standby state means a video and audio data output stop state.

  In the standby state, the control unit 10 can realize various functions as follows, for example. For example, even in the standby state, the control unit 10 supplies power to a circuit necessary for receiving download content information by its own timer based on the notification information, downloads the download content, and stands at the end of the download. It has a power control function to turn off the raised power. In addition, even when the power switch is turned off and the controller 10 shifts to a standby state, the control unit 10 maintains energization of necessary circuits, downloads download contents, and turns off the power when the download ends. It has a function.

  Moreover, the control part 10 can also perform the operation | movement similar to the electricity supply control function mentioned above for EMM acquisition.

  The control unit 10 can acquire EPG information by channel search in the standby state.

  Further, the control unit 10 receives the TMCC in the standby state, and monitors the emergency information descriptor (MH) in the MPT of the reception channel even when the activation control bit of the TMCC is 1, so that the emergency warning broadcast (EWS) Can be received.

  Moreover, the control part 10 can perform various reservation operation | movement (program reservation etc.) by a receiver.

  Further, the control unit 10 confirms the reception state of the broadcast signal in a plurality of physical channels within a predetermined search range between a low frequency range and a high frequency range in the frequency band of the broadcast wave received by the broadcast receiving device 1. Propose improvement of signal level. Confirmation of the broadcast signal reception state is performed by detecting (LOCK) the channel selected by the tuner unit Tu by the demodulator of the signal processing unit 3 to determine the presence or absence of the signal. When a signal is detected, a signal level (signal strength) of an IF frequency band component related to a predetermined physical channel and a CN (Carrier to ratio) are calculated and compared with a recommended value set in advance. It is determined whether or not the reception status is correct. If there is no error in the demodulated signal, it is determined that the channel is being received normally. If there is an error, it is determined that it has not been received. Note that the reception status may be confirmed using a combination of an indicator other than the signal level and CN (for example, BER (Bit Error Rate)).

  FIG. 3 is a flowchart for explaining an example of a reception state detection procedure. First, the control unit 10 checks whether or not the reception status data of each channel is stored in the RAM 10a or the nonvolatile memory 10c (S1). The data of the reception state refers to data of items specified as an index used in advance to determine the reception state, such as a signal level and CN. When the data is held (S1, YES), the reception state data in the initial state is extracted together with the data and displayed on the display screen of the video display unit 8 (S2). Note that the data in the initial state is the signal level and CN of each channel acquired in normal operations such as viewing, recording, and channel information acquisition before the reception state confirmation.

  When the data in the reception state is not held (S1, NO), and when the display of the data in the reception state in the initial state (S2) ends, the process proceeds to S3, and the data in the reception state is acquired. When it is set to check all channels as channels for checking the reception status (S3, YES), the signal level and CN are acquired for all the set channels (S4).

  On the other hand, if the setting for confirming all channels is not made (S3, NO), the signal level and CN of the channel set as the representative channel of the frequency band are acquired (S5). The reception state data acquired in S4 and S5 is displayed on the display screen of the video display unit 8. The reception status display will be described in detail later.

  Next, a method for making a signal level improvement proposal will be described. A channel appropriate for the improvement proposal is selected from the frequency band estimated to be receivable, and the reception state of the channel (data of a preset index such as signal level and CN) is detected. The signal level is improved by determining whether the detection result of each channel is good, whether it can be received, but it is below the recommended value, or whether it is in a reception-disabled state where the received signal is not detected. You can identify how to do it.

  FIG. 4 is a flowchart for explaining an example of the procedure for determining the improvement proposal contents of the reception state. The procedure in Fig. 4 is based on the assumption that BS / 110 ° CS satellite broadcasting (current rotation) and advanced broadband BS / CS broadcasting (left rotation) planned as 4K / 8K broadcasting are proposed. The procedure for presenting is illustrated.

  Based on the channel information included in the BS / 110 ° CS satellite broadcast, an appropriate channel for the improvement proposal is selected from the right-handed BS / CS IF and the left-handed BS / CS IF. For example, as of April 2018, as confirmation channels for right-handed BS / CS, BS15 (BS103), ND4 (CS100) and ND22 (CS161), which are free broadcasts, are used in the right-handed BS band and right-handed CS respectively. It can be selected as a confirmation channel for the low frequency and high frequency of the clockwise CS.

  In addition, as confirmation channels for left-handed BS / CS, BS17 which is performing test broadcasting in right-handed polarized waves, and CS channels (ND23 etc.) for left-handed advanced wideband BS / CS broadcasting are respectively left-handed BS band, It can be selected as a confirmation channel for the left-handed CS band. Note that the channels selected for improvement proposals are not limited to these.

  First, a channel set for confirming the right-handed BS is selected (S11). Since the right-handed BS can be received by the BS dedicated antenna used in the BS analog broadcasting era, first, the reception state of this channel is confirmed. If the signal level or CN is greater than or equal to the recommended value and it is determined that the reception state is good (S12, YES), the process proceeds to S16.

  On the other hand, when it is determined that the signal level or CN is less than the recommended value and the reception state is not good (S12, NO), the process proceeds to S13, where the parabolic antenna 21 is an antenna that is personally installed, that is, an antenna that can adjust the angle. It is determined whether or not. If the antenna is adjustable in angle (S13, YES), the installation angle is adjusted (S14). When angle adjustment is impossible, such as an antenna of an apartment house (S13, NO), it progresses to S16 and searches for other improvement methods.

  When the installation angle can be adjusted, the signal level and CN are measured again after the angle adjustment, and it is determined whether or not the maximum value is reached (S15). If the maximum value is not reached (S15, NO), the process returns to S14 and the angle of the antenna is adjusted again. When the signal level or CN reaches the maximum value (S15, YES), the angle adjustment of the antenna is terminated, and the process proceeds to S16.

  In S16, the reception state is confirmed again. If the reception state is good due to antenna angle adjustment or the like (S16, YES), the process proceeds to S22, and it is determined whether there is another band for checking the reception state (S22). If the reception state is not good (S16, NO), the process proceeds to S17 to search for an improvement method. If the connection state from the parabolic antenna 21 to the broadcast receiving device 1 is not confirmed (S17, NO), an improvement proposal is made to confirm the connection state (S18). If the connection state is confirmed (S17, YES), it is determined whether or not the channel being confirmed is adjusted (S19).

  If the adjustment has already been made (S19, YES), the replacement of the device to be used is proposed (S21). If no adjustment has been made (S19, NO), an improvement proposal is made to perform gain adjustment of the booster 41 or tilt correction (S20). In the case of a channel in the right-handed BS band, the signal level is low, so the improvement of the gain adjustment of the booster 41 is proposed.

  If an improvement proposal is made and improvement is performed, or if the reception state of the channel is good, the process proceeds to S22, and it is determined whether there is another band for checking the reception state (S22). Usually, the reception state is confirmed by moving the frequency band from the low frequency band channel to the high frequency band channel (switching sequentially). Therefore, in the above-described case, a low-frequency channel of right-handed CS is set (S23), and a series of procedures from S16 to S21 are repeated, and improvement proposals are made as necessary while checking the reception state. When the right-handed CS low-frequency channel ends, the right-handed CS high-frequency channel is set (S23), and the reception state is confirmed.

  When the broadcast receiving apparatus 1 is not a device compatible with the advanced broadband BS / CS, when the reception status confirmation for the channel in the right-handed frequency band is completed, the series of procedures for determining the improvement proposal is completed. When the broadcast receiving apparatus 1 is a device compatible with advanced broadband BS / CS, when the confirmation of the reception status of the high-frequency channel of the right-handed CS is finished, the channel of each band of the left-handed BS and CS is set in order and received. Are determined in order, and if it is determined that the reception state is not good, an improvement proposal is sought and determined.

  FIG. 5 and FIG. 6 are tables for explaining an example of determination criteria for the improvement proposal of the reception state. FIG. 5 and FIG. 6 show the results of confirming the reception status of each frequency band channel according to the procedure shown in FIG. 4, the status estimated for each result, and the improvement proposal for improving the reception status. Are summarized in FIG. 5 shows determination criteria for improvement proposals when the broadcast receiver 1 is not a device compatible with the advanced broadband BS / CS, and FIG. 6 shows a case where the broadcast receiver 1 is a device compatible with the advanced broadband BS / CS. The criteria for improvement proposals are shown. These criteria are set in the non-volatile memory 10c of the control unit 10 and are read as necessary.

  5 and 6, the frequency bands shown on the left side (right-handed IF-BS, right-handed IF-CS (Low), right-handed IF-CS (High), left-handed IF-BS, left-handed IF-CS) The lower symbol indicates the reception state in the representative channel of each frequency band. A circle indicates that the reception state is good, and a triangle indicates that reception is possible although it is below the recommended value. A cross mark indicates a state in which reception is not possible. When two or more symbols are written in one column, it indicates that the state is one of the states indicated by the written symbols. For example, when a circle mark and a triangle mark are marked, it indicates that the reception state is good or not, but the reception is possible. In addition, the horizontal bar mark indicates that the improvement proposal can be determined using the results of other frequency bands, and it is not necessary to confirm the reception state of the frequency band.

  For example, in FIG. 5, when the frequency band of the right-handed BS is not good but is in a receivable state, it is estimated that the signal level is low, and therefore the gain adjustment of the booster 41 is presented as an improvement proposal. In addition, the reception state of the right-handed BS frequency band is good, but the low-frequency part of the right-handed CS is not good but can be received. It is presumed that the parabolic antenna 21 is a BS dedicated antenna or a normal BS / CS antenna, but the signal attenuation is very large. Therefore, the improvement of the tilt correction of the booster 41 is proposed first, and if the situation is still not improved, the improvement proposal is presented so that the antenna is replaced with a normal BS / CS antenna (an antenna that also supports 110 ° CS).

  If the reception state is good in all frequency bands of right-handed BS and right-handed CS (low frequency, high frequency), it is determined to be normal and no improvement proposal is made.

  When the broadcast receiving apparatus 1 is a device compatible with the advanced broadband BS / CS, the reception status of the left-handed BS and the left-handed CS is confirmed in addition to the right-handed BS and right-handed CS (low frequency, high frequency) reception status. If the reception state of the right-handed frequency band is good, but the left-shift BS is receivable but not good, the parabolic antenna 21 is a normal BS / CS antenna that does not support advanced broadband BS / CS broadcasting. Since it is estimated, we propose to replace the antenna with an advanced broadband BS / CS compatible antenna.

  In addition, if the reception state of the high-frequency CS is not good but not good, it is presumed that the signal level in the high frequency band is low, so the tilt correction of the booster 41 is presented as an improvement proposal. Is done. If there is no improvement even after tilt correction, it is estimated that there is a possibility that a product not compatible with the high-bandwidth BS exists in the path from the parabolic antenna 21 to the broadcast receiving apparatus 1, so all the devices in the path Is exchanged for a product compatible with advanced broadband BS / CS, or an improvement proposal is made so that the broadcast receiver 1 is connected directly to the distributor 51.

  Furthermore, if the right-handed frequency band and the reception state of the left-handed BS are good, but the left-handed CS is receivable but not good, it is estimated that the signal level in the high-frequency band is low. The tilt correction of the booster 41 is presented as an improvement proposal.

  Note that if the reception state is good in all frequency bands of right-handed BS, right-handed CS (low frequency, high frequency), left-handed BS, and left-handed CS, it is judged as normal and no improvement proposal is made.

  These improvement proposals are displayed on the display screen of the video display unit 8 together with the reception state data. FIG. 7 is a diagram for explaining an example of the improvement proposal display screen. When the reception state is confirmed, the frequency characteristic 81 of the signal level is displayed on the display screen. In the frequency characteristics, for each channel whose reception state is confirmed, each signal level is displayed in a bar graph shape, for example. Each signal level exceeds the recommended value and the reception status is very good, exceeds the recommended value, but there is not enough room, is below the recommended value, an error has occurred, and reception is not possible , Etc. are displayed in different colors and patterns so that they can be identified at a glance.

  In FIG. 7, a state where the recommended value is exceeded and the reception state is very good is indicated by a white bar, a state where an error has occurred is indicated by a gray bar, and a state where reception is not possible is indicated by a black bar. ing. In addition, the recommended value is also written with a dotted line to make it easy to visually grasp the signal level margin. Furthermore, the trend of frequency characteristics is also shown with a dashed line, and the correction direction of the frequency characteristics is indicated by arrows so that the level difference exceeds the recommended value at all levels and the level difference is small from low to high. This makes it easier to visually grasp the direction of improvement.

  Further, the improvement proposal 82 determined using the procedure of FIG. 4 and the determination criteria of FIGS. 5 and 6 is displayed on the display screen together with the frequency characteristic 81 of the signal level. In this way, by clearly indicating the improvement proposal along with the current signal level on the display screen, the user can easily improve reception failure.

  The signal level frequency characteristic 81 and the improvement proposal 82 can be displayed not only on the display screen of the video display unit 8 but also transferred to a mobile device such as a smartphone. The booster 41 that performs gain adjustment and tilt correction in order to improve the reception state is generally installed in an invisible place such as the attic of a house. Therefore, it is difficult to adjust the booster 41 while viewing the display screen of the video display unit 8. On the other hand, in this embodiment, since the improvement method and the measurement result of the reception state can be viewed on the mobile device, it is possible to work efficiently even at a place away from the broadcast receiving apparatus 1.

  As described above, according to the broadcast receiving apparatus 1 of the present embodiment, the determination criteria for the improvement of the reception state are registered in the control unit 10 in advance, and the frequency characteristics of the signal level acquired when the reception state is confirmed. Is collated with the same judgment criteria, so that an improvement method can be automatically acquired. Therefore, since an improvement method is presented by confirming the reception state when reception failure occurs, it is possible to identify the cause of reception failure and search for an improvement plan, and the improvement can be easily performed. In addition, since the measurement result of the reception state and the improvement proposal can be transferred and displayed not only on the display screen but also on the mobile device, the improvement work at a place away from the broadcast receiving apparatus 1 becomes easy. Work efficiency is improved.

  Although several embodiments of the present invention have been described, these embodiments are shown by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Broadcast receiver, 1a, 1b ... Television receiver, 1c, 1d ... Recorder, 2a ... Input terminal, 2b, 2c, 2d ... Terminal, 3 ... Signal processing part, 4 ... Graphic processing part, 5 ... Signal Generation unit, 6 ... Video processing unit, 7 ... Audio processing unit, 8 ... Video display unit, 9 ... Speaker, 10 ... Control unit, 10c ... Non-volatile memory, 11 ... Operation unit, 12 ... Reception unit, 14 ... Card holder 15 ... CAS module, 21 ... parabolic antenna, 22 ... remote controller, 23 ... card, 31 ... converter, 41 ... booster, 51 ... distributor, 81 ... frequency characteristic of signal level, 82 ... improvement proposal, 100 ... broadcast System 200, reception facility, 300, reception processing facility, 400, broadcast satellite, 500a, 500b, 500c, transmission device, 600, broadcast transmission path.

Claims (6)

A control unit that detects a reception state of a broadcast wave received from an antenna, and outputs an improvement method proposal for improving the state to a good state based on a detection result;
A video signal output unit for outputting a video signal for displaying the detection result and the proposed improvement method;
A broadcast receiving apparatus.   The control unit detects a reception state of the broadcast wave for each channel representing a plurality of different frequency bands, and determines the improvement method plan based on a detection result regarding each channel. Item 2. The broadcast receiving device according to Item 1.   The broadcast receiving apparatus according to claim 2, wherein both the right-hand circularly polarized broadcast wave and the left-hand circularly polarized broadcast wave can be received.   The broadcast receiving apparatus according to claim 1, wherein the detection result and the improvement method proposal are transferred so as to be displayed on a mobile device.   The broadcast receiving apparatus according to claim 4, wherein the improvement method proposal includes control of a booster that adjusts and transmits characteristics of the broadcast wave received from the antenna. Detect the broadcast wave reception status received from the antenna,
Based on the detection result, output an improvement method proposal for improving the state to a good state,
Outputting a video signal for displaying the detection result and the proposed improvement method;
Broadcast receiving method.