JP7075269B2 - Broadcast receiving device and broadcasting receiving method - Google Patents

Description

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

In television broadcasting, the receiver (broadcast receiving device) receives the contents of the broadcast program via the reception processing equipment. The content of the broadcast program is conveyed from the reception processing equipment to the broadcast reception 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 received signal processing equipment into a predetermined intermediate frequency band.

Satellite broadcasting has diversified due to changes in broadcasting methods according to the needs of the times, from BS analog broadcasting to BS digital / 110 ° CS digital broadcasting and 4K / 8K broadcasting (advanced wideband BS broadcasting and advanced wideband CS broadcasting). ing. In these broadcasting systems, the frequency bands of IF signals are different from each other. Therefore, the broadcast receiving device may not be able to receive the contents of the broadcast program unless it is equipped with the reception processing equipment corresponding to each frequency band.

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

As described above, when a new broadcasting technique or broadcasting system is introduced, a new cause of poor reception may occur. However, in the conventional broadcast receiving device, there is a problem that when a reception failure occurs, the cause of the reception failure cannot be identified and the improvement method is unclear.

Japanese Unexamined Patent Publication No. 2010-74777 Japanese Unexamined Patent Publication No. 2004-32621

An object of the present embodiment is to provide a broadcast receiving device and a broadcast receiving method capable of easily improving a reception defect by proposing an improvement method when a reception defect occurs. ..

The broadcast receiving device of the present embodiment has a control unit that detects the reception state of the broadcast wave received from the antenna and outputs an improvement method for improving the state based on the detection result, and the detection result. It also has a video signal output unit that outputs a video signal for displaying the improvement method . In the control unit, the improvement method proposal according to the characteristics of the receivable broadcast wave , which includes a signal adjustment proposal and a device replacement proposal, is registered in advance , and the control unit is registered. As the channel for detecting the reception state of the broadcast wave, the BS channel of the broadcast wave having a right-handed circular polarization is selected as the first detection target channel, and the reception state is not good with respect to the first detection target channel. If it is detected, the antenna angle adjustment is output as the first improvement method, and if it is detected that the reception state of the first detection target channel is good, the reception state of the broadcast wave is changed. The channel having a frequency band different from that of the first detection target channel is selected as the second detection target channel as the detection target channel, and it is detected that the reception state of the second detection target channel is not good, and the detection is performed. When the frequency band including the second detection target channel is not adjusted, the signal adjustment proposal and the equipment replacement proposal are selected and output as the second improvement method, and the second detection target channel is output. When it is detected that the reception state is not good and the frequency band including the second detection target channel is adjusted, the device replacement proposal is selected as the third improvement method. Output .

The schematic diagram which shows an example of the broadcasting system configuration using the broadcasting receiving apparatus which concerns on this embodiment. The block diagram which shows an example of the structure of the broadcast receiving apparatus which concerns on embodiment. A flowchart illustrating an example of a reception status detection procedure. A flowchart illustrating an example of a procedure for determining the content of a proposal for improving the reception status. A table explaining an example of the criteria for judging the improvement proposal of the reception condition. A table explaining an example of the criteria for judging the improvement proposal of the reception condition. The figure explaining an example of the display screen of the improvement proposal.

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

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

FIG. 1 is a schematic diagram showing a configuration of a broadcasting system 100 according to the present embodiment. The broadcasting system 100 includes one or more transmitting devices 500a, 500b, 500c, a receiving facility 200, and a broadcasting receiving device 1. The number of transmission devices 500a to 500c does not have to be three, and may be any number. The transmitters 500a to 500c include transmission of high-bandwidth BS broadcasting and high-wideband CS broadcasting, which are scheduled to start main broadcasting in Japan from December 2018, in addition to conventional BS / CS / high-narrowband CS broadcasting. ..

The transmitting 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 equipment 300 via the broadcast transmission line 600. The transmission devices 500a, 500b, and 500c are installed for each broadcaster, for example.

The broadcast transmission line 600 is a transmission line that simultaneously transmits broadcast waves to an unspecified number of broadcast receiving devices 1. The broadcast transmission line 600 includes a relay device (not shown) loaded on the broadcast satellite 400. The broadcasting satellite 400 includes a BS (Broadcasting Satellite), which is a broadcasting satellite dedicated to broadcasting, and a CS (Communication Satellite), which is a communication satellite used for communication. Whether to use BS or CS is predetermined according to the group of frequency bands.

The relay device is a device that shifts the frequency of the broadcast wave received from the transmission device 500. Further, the relay device receives the broadcast wave received by the receiving equipment 200 as a right-handed circular polarization (right-handed circular polarization, right-handed polarization) or a left-turning polarization (left-handed circular polarization, left-handed polarization). It is a device that generates waves). Whether to use right-handed circular polarization or left-handed circular polarization is predetermined according to the type of broadcast wave and the group of frequency bands.

A part of the broadcast transmission line 600 may include a communication line, for example, a communication line from the transmission device 500 to the transmission equipment for transmitting radio waves.

The receiving equipment 200 includes a receiving processing equipment 300, a booster 41, and a distributor 51.

The reception processing equipment 300 generates an IF signal from the parabolic antenna 21 that receives the broadcast wave transmitted by each transmission device 500 via the broadcast transmission path 600 and the received signal by the broadcast wave received by the parabolic antenna 21. It is configured to include a part 31.

The reception processing equipment 300 receives the broadcast wave transmitted by each transmission device 500 via the broadcast transmission line 600. The reception processing equipment 300 converts the received broadcast wave into an IF signal. The reception processing equipment 300 outputs the converted IF signal to the broadcast reception device 1 via, for example, a booster 41 or a distributor 51. 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 it. The booster 41 also has a tilt adjusting function for flattening the frequency characteristics and outputting the booster 41. On the other hand, the booster 41 may cause non-linear distortion in the output signal. The case where this distortion occurs is, for example, the case where the strength of the input signal exceeds the allowable level of the booster 41. Alternatively, 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 the impedance matching from being disturbed.

The reception processing equipment 300 is installed in each home, business establishment, or the like. It may be installed in each facility such as a condominium or a building, or it may be installed in a group of a plurality of facilities.

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

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

The broadcast receiving device 1 has a mixture of those capable of receiving only the polarization in the right turning direction and those capable of receiving the polarization in the left turning direction. If a receiver that can receive only the polarization in the right turn direction is located upstream of the own machine, even if the own machine can receive the polarization in the left turn direction, the bias in the left turn direction. No waves are transmitted. For example, when the broadcast receiving device 1c capable of receiving only the polarization in the right turning direction is arranged between the broadcasting receiving device 1a capable of receiving the polarization in the left turning direction and the distributor 51, the broadcast receiving device 1c is arranged. The polarization in the left turning direction is not transmitted downstream from this because it is lost in the broadcast receiving device 1c. Therefore, the polarization in the left turning 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 device 1 is directly connected to the distributor 51, such as the broadcast receiving devices 1b and 1d.

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

The parabolic antenna 21 is planned to be a BS / 110 ° CS satellite broadcast, which is a current broadcast transmitted by polarization in the right turning direction, or a 4K / 8K broadcast, and is transmitted by polarization in the left turning direction. The high-wideband BS broadcast and the high-wideband CS broadcast (hereinafter, these are referred to as high-broadband broadcasts) are received, and the current broadcast and the high-wideband broadcast signal are transmitted to the broadcast receiving device 1 via the converter 31, the booster 41, and the distributor 51. Supply to the input terminal 2a. The current broadcast and advanced wideband broadcast signals 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, these are collectively 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 current broadcast signal or the advanced wideband broadcast signal input respectively, and the selected signal is transmitted 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 current broadcast and the parabolic antenna 21 corresponding to the advanced wideband broadcasting are shown, but antennas corresponding to the terrestrial digital broadcasting, BS / 110 ° CS satellite broadcasting, and advanced wideband BS / CS broadcasting are shown. It may be provided so that the signal from each antenna is supplied to the tuner unit Tu. In this case, the signal processing unit 3 performs demodulation corresponding to the modulation method of each broadcast. As a result, the signal processing unit 3 can obtain a stream of each broadcast signal. Although FIG. 2 shows an example in which each broadcast signal is input via an antenna, the transmission path of the broadcast signal is not particularly limited, and an IP broadcast received via an Internet line without going through an antenna or the like. , It may be received via a cable television broadcasting network.

For example, for an advanced wideband broadcast signal, a TLV (Type Length Value) stream can be obtained by demodulation of the signal processing unit 3. The signal processing unit 3 separates the IP packet contained in the TLV stream, and the video data, audio data, subtitle data, character super, application data, ECM (entryment Control Message), and EMM (entryment Management Message) contained in the IP packet are separated. ) Is included in various messages.

Further, the signal processing unit 3 extracts a transport stream (transport stream multiplexed according to the MPEG-2 Systems standard) by demodulation processing for the 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 also extracts various messages including ECM and EMM.

The broadcast receiving device 1 is provided with a CAS module 15. The CAS module 15 is used for controlling the limited reception method. The CAS module 15 may be mounted on a chip built in the broadcast receiving device 1 and configured, or may be configured by a board in which the CAS module is built, and is provided in a slot (not shown) provided in the broadcast receiving device 1. It is also conceivable that the limited reception function can be realized by inserting the board into the. Further, the CAS module 15 has both a limited reception function for advanced wideband broadcasting and a limited reception function for current broadcasting, or has only a limited reception function for advanced wideband broadcasting, and the limited reception function for current broadcasting is described. It may be realized by a CAS card as an IC card 23.

The signal processing unit 3 performs decoding processing on the extracted video and audio of each broadcasting method, 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 superimpose 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 the digital video data from the signal processing unit 3 and the window drawing based on the GUI (Graphical User Interface) from the OSD signal generation unit 5, and broadcasts the data on the image based on the video data. Images based on the GUI and GUI are superimposed, and the superimposed images are sent to the image processing unit 6.

For example, in addition to video data, various data for acquiring a program, electronic program guide (EPG) information, program attribute information, subtitle information, etc. are given to the graphic processing unit 4, and the graphic processing unit 4 inputs these. Image generation processing can be performed to display EPG, subtitles, etc. based on the displayed information.

The video processing unit 6 as a video signal output unit is controlled by the control unit 10 and has a format (number of pixels, frame frequency, scanning method) capable of displaying the digital video signal from the graphic processing unit 4 on the video display unit 8. It is converted and the display color is arbitrarily adjusted and output to the video display unit 8. As a result, the image can be displayed on the display screen of the image display unit 8.

Further, the voice processing unit 7 converts the digital voice data from the signal processing unit 3 into an analog voice signal that can be reproduced by the speaker 9, and then outputs the output to the speaker 9 to reproduce the voice. If the broadcast receiving device 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 device 1 is provided with a card interface (I / F) 13, a communication I / F16, a USB I / F17, and an HDMI I / F18. The card I / F 13 enables data to be transmitted / received between the IC card 23 mounted on the card holder 14 and the control unit 10. For example, when a CAS card compatible with the current digital broadcasting (hereinafter referred to as a B-CAS card) is adopted as the IC card 23, the card I / F 13 transmits / receives data related to the descramble of the current broadcasting.

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

Further, the HDMI I / F18 is an interface corresponding to the HDMI (registered trademark) standard, and is connected to an external device (not shown) via the terminal 2d to receive an HDMI (registered trademark) signal from the external device and control unit. It can be output to 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 an HDD 24 via a terminal 2c 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 give and record video data to the HDD 24 via the USB I / F 17 and the terminal 2c.

When the recording unit is configured by an HDD (not shown), an optical disk disk drive, an SD (registered trademark) card reader / writer, or the like built in the broadcast receiving device 1, the control unit 10 records the signals of the broadcast program. It is also possible to record in the department.

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

The broadcast receiving device 1 is provided with an operation unit 11 and a receiving unit 12. The operation unit 11 is composed of switches, keys, buttons and the like (not shown), and outputs an operation signal based on the user operation to the control unit 10. Further, the receiving unit 12 receives an operation signal based on the 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 receiving device 1 based on the operation signals from the operating unit 11 and the receiving unit 12. For example, when the remote controller 22 performs an operation of designating a receiving channel number by 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 receiving unit 12. Do 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 device 1. The broadcast receiving device 1 is provided with a power supply circuit (not shown) for supplying power to each part, and the control unit 10 controls the power supply to each part by operating the power switch and stands by. It is designed to be 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 in FIG. 2 are in an operation stopped state, and the control unit 10 operates. Even if the user does, the user cannot watch the broadcast program. When the present embodiment is applied to a decoder that receives high-frequency wideband broadcasting and outputs video and audio, the standby state means a state in which video and audio data output is stopped.

The control unit 10 can realize various functions in the standby state, for example, as follows. For example, even in the standby state, the control unit 10 supplies power to the circuit necessary for receiving the 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. Further, the control unit 10 keeps the necessary circuit energized, downloads the download contents, and turns off the power at the end of the download even when the power switch is turned off to shift to the standby state. Has a function.

Further, the control unit 10 can perform the same operation as the above-mentioned energization control function for EMM acquisition.

Further, 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 even when the activation control bit of the TMCC is 1, it monitors the emergency information descriptor (MH) in the MPT of the receiving channel to perform an emergency warning broadcast (EWS). Can be received.

Further, the control unit 10 can execute various reservation operations (program reservation, etc.) by the receiver.

The control unit 10 further confirms the reception status of the broadcast signal in a plurality of physical channels within a predetermined search range from the low frequency band to the high frequency band in the frequency band of the broadcast wave received by the broadcast receiver 1. , Propose improvement of signal level. To confirm the reception status of the broadcast signal, the demodulator of the signal processing unit 3 detects (LOCKs) the channel selected by the tuner unit Tu, thereby determining the presence or absence of the signal. When a signal is detected, it is stable by calculating the signal level (signal strength) of the IF frequency band component related to a predetermined physical channel and CN (Carrier to ratio) and comparing it with a preset recommended value. Judge whether or not the reception status is the same. If there is no error in the demodulated signal, it is determined that the channel is normally received. If there is an error, it is determined that it has not been received. The reception status may be confirmed by using a combination of a signal level and an index other than CN (for example, BER (Bit Error Rate)).

FIG. 3 is a flowchart illustrating an example of a reception state detection procedure. First, the control unit 10 confirms whether or not the reception state data of each channel is stored in the RAM 10a or the non-volatile memory 10c (S1). The reception status data refers to data of items specified as indicators used in advance for determining the reception status, such as signal level and CN. When the data is retained (S1, YES), the data in the reception state in the initial state is extracted together with the data and displayed on the display screen of the video display unit 8 (S2). The data in the initial state is the signal level and CN of each channel acquired in normal operation such as viewing, recording, and channel information acquisition before confirming the reception status.

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

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

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

FIG. 4 is a flowchart illustrating an example of a procedure for determining the content of the proposal for improving the reception state. The procedure in Fig. 4 assumes the current broadcasting (right-handed), which is BS / 110 ° CS satellite broadcasting, and the advanced wideband BS / CS broadcasting (left-handed), which is planned as 4K / 8K broadcasting, and proposes a signal level improvement plan. The procedure for presenting is illustrated.

Based on the channel information included in the BS / 110 ° CS satellite broadcasting, select the appropriate channel for the improvement proposal 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), free-to-air broadcasting ND4 (CS100), and ND22 (CS161) are used for right-handed BS band and right-handed CS, respectively. It can be selected as a confirmation channel for low frequencies and high frequencies for right-handed CS.

As confirmation channels for left-handed BS / CS, BS17 for test broadcasting within right-handed polarization and CS channel for high-bandwidth BS / CS broadcasting for left-handed waves (ND23, etc.) are used in the left-handed BS band, respectively. It can be selected as a confirmation channel for the left-handed CS band. The channels selected for improvement proposals are not limited to these.

First, a channel set for confirmation of 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, the reception status of this channel is first confirmed. If the signal level or CN is equal to or higher than the recommended value and it is determined that the reception condition is good (S12, YES), the process proceeds to S16.

On the other hand, if the signal level or CN is less than the recommended value and it is determined that the reception condition is not good (S12, NO), the process proceeds to S13, and the parabolic antenna 21 is a personally installed antenna, that is, an antenna whose angle can be adjusted. It is determined whether or not it is. When the antenna has an adjustable angle (S13, YES), the installation angle is adjusted (S14). If the angle cannot be adjusted (S13, NO) such as the antenna of an apartment house, proceed to S16 and search for other improvement methods.

If 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 antenna angle is adjusted again. When the signal level or CN reaches the maximum value (S15, YES), the antenna angle adjustment is completed and the process proceeds to S16.

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

If the adjustment has already been made (S19, YES), it is suggested to replace the equipment used (S21). If the adjustment has not been made (S19, NO), an improvement proposal is made to adjust the gain of the booster 41 or to correct the tilt (S20). In the case of a channel in the right-handed BS band, the signal level is low, so we propose to improve the gain adjustment of the booster 41.

If an improvement proposal is made and the improvement is carried out, or if the reception state of the channel is good, the process proceeds to S22, and it is determined whether or not there is another band for checking the reception status (S22). Normally, the frequency band is moved (sequentially switched) from the low frequency band channel to the high frequency band channel to check the reception status. Therefore, in the above case, the low frequency channel of the right-handed CS is set (S23), and by repeating a series of procedures from S16 to S21, an improvement proposal is made as necessary while confirming the reception state. When the low-frequency channel of the right-handed CS ends, the high-frequency channel of the right-handed CS is set (S23), and the reception status is confirmed.

If the broadcast receiving device 1 is not a device compatible with an advanced wideband BS / CS, when the confirmation of the reception state 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 device 1 is an advanced wideband BS / CS compatible device, when the confirmation of the reception status of the high frequency channel of the right-handed CS is completed, the channels of the left-handed BS and CS bands are set in order and the reception state is received. Are checked in order, and if it is determined that the reception condition is not good, improvement proposals are sought and decided.

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

In FIGS. 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 symbols below indicate the reception status in the representative channel of each frequency band. A circle indicates that the reception condition is good, and a triangle mark indicates that reception is possible although the value is below the recommended value. In addition, the 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 and a triangle are marked, it indicates that the reception state is good, or that the reception state is not good but can be received. Further, the horizontal bar mark indicates that the improvement proposal can be determined by 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 it is in a receivable state, it is presumed that the signal level is low, so that the gain adjustment of the booster 41 is presented as an improvement proposal. Further, when the reception state of the frequency band of the right-handed BS is good, but the low range of the right-handed CS is not good but the reception is possible, and the high range of the right-handed CS is also not good in the reception state. It is presumed that the parabolic antenna 21 is either a BS-dedicated antenna or a normal BS / CS antenna, but the signal attenuation is very large. Therefore, first, the tilt correction of the booster 41 is proposed to be improved, and if the condition is not improved, the improvement proposal is presented to replace the antenna with a normal BS / CS antenna (an antenna that also supports 110 ° CS).

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

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

In addition, if the reception condition in the high frequency range of the right-handed CS is not unreceivable but not good, it is estimated 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. Will be done. If the tilt correction does not improve the problem, it is presumed that there may be a product that does not support the advanced wideband BS in the path from the parabolic antenna 21 to the broadcast receiver 1, so all the devices in the path. Is replaced with an advanced wideband BS / CS compatible product, or an improvement proposal is made to connect the broadcast receiving device 1 directly to the distributor 51.

Further, if the reception state of the right-handed frequency band and the left-handed BS is good, but the left-handed CS can be received but is not in a good state, 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.

If the reception condition is good in all the frequency bands of right-handed BS, right-handed CS (low range, high range), left-handed BS, and left-handed CS, it is judged to be 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 status data. FIG. 7 is a diagram illustrating an example of an improvement proposal display screen. When the reception state is confirmed, the frequency characteristic 81 of the signal level is displayed on the display screen. As for the frequency characteristic, the signal level of each channel whose reception state is confirmed is displayed, for example, in a bar graph. Each signal level exceeds the recommended value and the reception condition is extremely good, the recommended value is exceeded but there is no margin, the value is below the recommended value, an error occurs, and reception is not possible. , Etc. are displayed in different colors and patterns in each state so that they can be identified at a glance.

In FIG. 7, a white bar indicates a state in which the recommended value is exceeded and the reception state is extremely good, a gray bar indicates a state in which an error occurs, and a black bar indicates a state in which reception is not possible. ing. In addition, the recommended values are also shown by dotted lines, making it easier to visually grasp the margin of the signal level. Furthermore, the tendency of the frequency characteristics is also indicated by a straight line indicated by a chain line, and the correction direction of the frequency characteristics is indicated by an arrow in order to exceed the recommended value at all levels and make the level difference small from the low range to the high range. This makes it easier to visually grasp the direction of improvement.

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

The frequency characteristic 81 of the signal level 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 adjusts the gain and corrects the tilt in order to improve the reception condition is generally installed in an invisible place such as the attic of a house. Therefore, it is difficult to adjust the booster 41 while looking at the display screen of the image display unit 8. On the other hand, in the present embodiment, since the improvement method and the measurement result of the reception state can be viewed on the mobile device, the work can be efficiently performed even at a place away from the broadcast reception device 1.

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

Although some embodiments of the present invention have been described, these embodiments are shown as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Broadcast receiver, 1a, 1b ... Television receiver, 1c, 1d ... Recorder, 2a ... Input terminal, 2b, 2c, 2d ... Terminal, 3 ... Signal processing unit, 4 ... Graphic processing unit, 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 ... Receiver unit, 14 ... Card holder , 15 ... CAS module, 21 ... Parabola antenna, 22 ... Remote controller, 23 ... Card, 31 ... Converter, 41 ... Booster, 51 ... Distributor, 81 ... Signal level frequency characteristics, 82 ... Improvement proposal, 100 ... Broadcast System, 200 ... reception equipment, 300 ... reception processing equipment, 400 ... broadcast satellite, 500a, 500b, 500c ... transmission device, 600 ... broadcast transmission line.

Claims (6)

A control unit that detects the reception state of the broadcast wave received from the antenna and outputs an improvement method plan for improving the reception state based on the detection result.
A video signal output unit that outputs a video signal for displaying the detection result and the improvement method plan, and a video signal output unit.
Have,
In the control unit, the improvement method proposal according to the characteristics of the receivable broadcast wave , which includes a signal adjustment proposal and a device replacement proposal, is registered in advance .
The control unit selects the BS channel of the broadcast wave of right-handed circular polarization as the channel for detecting the reception state of the broadcast wave and sets it as the first detection target channel, and the reception of the first detection target channel. When it is detected that the state is not good, the antenna angle adjustment is output as the first improvement method, and when it is detected that the reception state of the first detection target channel is good, the broadcast wave As the channel for detecting the reception state, the channel having a frequency band different from that of the first detection target channel is selected as the second detection target channel, and it is detected that the reception state is not good with respect to the second detection target channel. If the frequency band including the second detection target channel has not been adjusted, the signal adjustment proposal and the equipment replacement proposal are selected and output as the second improvement method, and the second is output. 2 When it is detected that the reception state of the detection target channel is not good and the frequency band including the second detection target channel is adjusted, the device replacement proposal is proposed as a third improvement method. Broadcast receiver that selects and outputs . The control unit is characterized in that the reception state of the broadcast wave is detected for each of the channels representing a plurality of different frequency bands, and the improvement method is determined based on the detection result for each of the channels. , The broadcast receiving device according to claim 1. The broadcast receiving device according to claim 2, wherein both the broadcast wave having a right-handed circular polarization and the broadcast wave having a left-handed circular polarization can be received. The broadcast receiving device according to claim 1, wherein the detection result and the improvement method are transferred so as to be displayable on a mobile device. The broadcast receiving device according to claim 4, wherein the improved method method includes control of a booster that adjusts and transmits the characteristics of the broadcast wave received from the antenna. The BS channel of the right-handed circularly polarized broadcast wave is selected as the channel for detecting the reception state of the broadcast wave received from the antenna, and is set as the first detection target channel .
When it is detected that the reception state is not good for the first detection target channel, the antenna angle adjustment is output as the first improvement method.
When it is detected that the reception state of the first detection target channel is good, the channel having a frequency band different from that of the first detection target channel is selected as the channel for detecting the reception state of the broadcast wave. And set it as the second detection target channel.
When it is detected that the reception state of the second detection target channel is not good and the frequency band including the second detection target channel is not adjusted, the characteristics of the broadcast wave that can be received are adjusted. A second improvement for improving the reception state based on the detection result from a plurality of pre-registered improvement method proposals including the signal adjustment proposal and the device replacement proposal, which are the improvement method proposals corresponding to the above. As a method, the signal adjustment proposal and the equipment replacement proposal are selected and output.
When it is detected that the reception state of the second detection target channel is not good and the frequency band including the second detection target channel is adjusted, a plurality of the improvement methods registered in advance. From the plan, select and output the device replacement proposal as the third improvement method plan, and output it.
Outputs a video signal for displaying the detection result and the improvement method.
Broadcast reception method.

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