JP6999428B2 - Broadcast signal receiver and its method - Google Patents

Description

The present embodiment relates to a broadcast signal receiving device capable of optimally controlling the output of a wireless LAN provided in the broadcasting signal receiving device, and a control method thereof.

A broadcast signal receiving device, for example, a television device, has a connection I / F with a local area network (LAN) in order not only to display a program of the received broadcast signal but also to display Web information via the Internet. There are many models. As this LAN, a wireless LAN is generally adopted because of the convenience of deciding the place where the television device is installed.

Japanese Unexamined Patent Publication No. 2017-152806

The wireless LAN uses a frequency band of 2.4 GHz / 5 GHz, which is the same frequency band as the IF frequency of advanced BS broadcasting. The level of the output signal of the wireless LAN built in the broadcast signal receiving device is much higher than the magnitude of the signal of the IF frequency of the advanced BS digital broadcasting. Therefore, the signal quality of the advanced BS digital broadcasting signal may be deteriorated by the signal of the wireless LAN.

Therefore, it is an object of the present embodiment to provide a broadcast signal receiving device capable of controlling the transmission output and modulation parameters of a wireless LAN signal and a control method thereof in order to ensure the signal quality of the advanced BS digital broadcast signal. ..

The broadcast signal receiving device of the present embodiment is a broadcast signal receiving device capable of wireless communication and receiving a broadcast signal, and has a wireless transmission / reception unit that performs the wireless communication using the first frequency band and the first. A tuner that receives a broadcast signal sent using a frequency band of 1 and a second frequency band that is at least partially covered, and a tuner that receives the broadcast signal using the second frequency band. By changing the outputs of the measuring unit for measuring the quality of the broadcast signal and the wireless transmission / reception unit, the output of the wireless transmission / reception unit is the broadcast using the change in the quality of the broadcast signal measured by the measurement unit. When it is determined that the output of the detection unit that detects whether or not it is interfering with the signal and the output of the radio transmission / reception unit are interfering with the broadcast signal, the transmission output of the radio transmission / reception unit is adjusted to be lowered. It is a broadcast signal receiving device provided with an adjusting unit.

FIG. 1 is a diagram showing an example of an overall configuration of a broadcast signal receiving device to which the present embodiment is applied. FIG. 2 is a diagram showing the IF frequency band of advanced BS digital broadcasting left-handed and the usage status of the frequency band. FIG. 3 is an example of a processing flow in which the control unit 150 detects whether or not the wireless LAN signal interferes with the advanced BS digital broadcasting signal. FIG. 4 shows a processing flow in which the control unit 150 adjusts the transmission output of the wireless transmission / reception unit 181 when it is detected in the processing flow of FIG. 3 that the wireless LAN signal interferes with the advanced BS digital broadcasting signal. This is an example. FIG. 5 is a diagram showing an example of a recording reservation list.

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

FIG. 1 is a diagram showing an example of an overall configuration of a broadcast signal receiving device 100 to which the present embodiment is applied.

The broadcast signal receiving device 100 includes a terrestrial digital television broadcasting tuner 101 for receiving terrestrial digital television broadcasting, a BS digital broadcasting tuner 102-1 for receiving BS digital broadcasting / advanced BS digital broadcasting, and a wideband CS digital broadcasting. / A CS digital broadcasting tuner 102-2 for receiving an advanced wideband CS digital broadcasting is provided. The BS digital broadcasting tuner 102-1 and the CS digital broadcasting tuner 102-2 are integrally formed as a satellite digital broadcasting tuner, for example, or are composed of one tuner.

When the terrestrial digital television broadcast tuner 101 receives a terrestrial digital television broadcast, it extracts a stream of a channel selected from the received broadcast signal and inputs it to the 2K decoder 121.

When the BS digital broadcast tuner 102-1 receives the BS digital broadcast, it extracts a stream of the channel selected from the received broadcast signal and inputs it to the 2K decoder 131 or the 4K decoder 132 or the 8K decoder 133.

When the CS digital broadcast tuner 102-2 receives a wideband CS digital broadcast, it extracts a stream of the channel selected from the received broadcast signal and inputs it to the 2K decoder 131 or the 4K decoder 132 or the 8K decoder 133. .. The broadcast signal receiving device 100 does not have to have the CS digital broadcasting tuner 102-2 .

The measuring unit 110 measures the quality of the broadcast signal received by the BS digital broadcast tuner 102-1 and the CS digital broadcast tuner 102-2. The method and means for measuring the quality of the broadcast signal will be described later.

The control unit 150 is a device for displaying the video and audio decoded output of either the 2K decoder 121, the 2K decoder 131, the 4K decoder 132 or the 8K decoder 133 on the display 172 or the speaker 174. Control each block in a centralized manner.

The decoded output selected by the control unit 150 is input to the content processing unit (including the video / audio / subtitle data processing unit) 160.

When the broadcast signal receiving device 100 is receiving the advanced BS digital broadcast, the control unit 150 determines whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal. The control unit 150 adjusts the output of the wireless LAN by controlling the wireless transmission / reception unit 181 in order to prevent the wireless LAN signal from interfering with the signal of the advanced BS digital broadcasting according to the determination result. conduct.

The control unit 150 includes a detection unit 151, an adjustment unit 152, and a memory 153 inside.

The detection unit 151 detects whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal by using the measurement result from the measurement unit 110.

The adjusting unit 152 adjusts the output of the wireless LAN by controlling the wireless transmitting / receiving unit 181 when the signal of the wireless LAN interferes with the advanced BS digital broadcasting signal. Specifically, when there is interference, the output of the wireless LAN is lowered to adjust the interference so that the interference becomes smaller.

The memory 153 can store the value of the transmission output of the wireless LAN set in the wireless transmission / reception unit 181 and the setting value related thereto. The memory 153 can also store information related to functions related to the reception of the broadcast signal, such as program information received by the broadcast signal receiving device 100 and a recording reservation list for recording the received program.

Details of the control of the wireless transmission / reception unit 181 performed by the control unit 150, the detection unit 151, and the adjustment unit 152 will be described with reference to FIGS. 3 and 4.

When processing content such as a video signal, an audio signal, and subtitle data, the content processing unit 160 performs color adjustment, brightness adjustment, volume adjustment, subtitle display on / off control, and the like.

The video signal output from the content processing unit 160 is processed by the display signal output unit 171 for displaying on a display unit 172 having an 8K display capability (for example, gamma correction suitable for the function and size). It is output to the display 172. Further, the audio signal output from the content processing unit 160 is converted and amplified by the audio signal output unit 173 into an audio channel corresponding to the audio system, and output to the speaker 174.

The remote control receiving unit 180 receives a signal from the remote control (remote controller) 200.

The wireless transmission / reception unit 181 can transmit / receive data via, for example, a wireless LAN router (not shown) and a wireless line. The wireless LAN referred to here is, for example, a wireless LAN that satisfies the standard of the IEEE802.11 series. The wireless transmission / reception unit 181 can obtain information such as network service information and online distribution video via a network such as the Internet connected to the end of a wireless LAN router which is an access point.

The wireless transmission / reception unit 181 can also adjust the output of the wireless LAN according to the instruction of the control unit 150.

The wireless transmission / reception unit 181 of the broadcast signal receiving device 100 given in the example of FIG. 1 is shown as a transmission / reception unit capable of wireless LAN communication, but another short-range wireless system, for example, as a functional block within the same functional block or another functional block, for example. A Bluetooth (registered trademark) transmitter / receiver and other wireless systems may be provided. In other short-range wireless systems, other wireless systems, etc., as in the case of wireless LAN, if the frequency and output interfere with the advanced BS digital broadcast signal, the output etc. are adjusted in the same way as in the wireless LAN. The adjustment may be made so that the interference with the advanced BS digital broadcast signal is reduced.

FIG. 2 is a diagram showing the usage status of the IF frequency band of advanced BS digital broadcasting left-handed and other wireless systems in the frequency band.

The frequency band 201 represents the frequency used for each channel of the left-handed I / F frequency of advanced BS digital broadcasting.

The frequency band 202 represents the frequency used by another wireless system (for example, wireless LAN).

As shown in FIG. 2, the wireless LAN uses the frequency band of 2412 MHz to 2484 MHz. The frequency band used by this wireless LAN overlaps with the I / F frequency used in channels 10, 12, and 14 of the left-handed advanced BS digital broadcasting.

Therefore, the control unit 150 determines whether or not the wireless LAN signal interferes with the received advanced BS digital broadcast signal, and depending on the determination result, the wireless LAN signal interferes with the advanced BS digital broadcast signal. In order to avoid the above, the output of the wireless LAN signal is adjusted by controlling the wireless transmission / reception unit 181.

Hereinafter, a process of avoiding interference of the wireless LAN signal with the advanced BS digital broadcast signal by controlling the wireless transmission / reception unit 181 by the control unit 150 will be described.

The process performed by the control unit 150 to avoid interference of the wireless LAN signal with the advanced BS digital broadcast signal includes the following two steps.

The first step is a step of detecting whether or not the wireless LAN signal interferes with the advanced BS digital broadcasting signal.

The second step is the adjustment of the transmission output of the wireless LAN performed by the wireless transmission / reception unit 181 when it is detected that the signal of the wireless LAN interferes with the advanced BS digital broadcast signal.

First, the process of detecting whether or not the wireless LAN signal, which is the first step, interferes with the advanced BS digital broadcasting signal will be described.

FIG. 3 is an example of a processing flow in which the control unit 150 detects whether or not the wireless LAN signal interferes with the advanced BS digital broadcasting signal.

When the BS digital broadcasting tuner 102-1 receives the advanced BS digital broadcasting signal, the control unit 150 confirms the channel of the advanced BS digital broadcasting signal received by the BS digital broadcasting tuner 102-1. When the control unit 150 confirms that the channel of the advanced BS digital broadcast signal received by the BS digital broadcast tuner 102-1 is any of 10 channels, 12 channels, and 14 channels, the control unit 150 detects this fact. Notify to.

Upon receiving the notification from the control unit 150 , the detection unit 151 starts the detection process of whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal (S300).

When the detection unit 151 starts the detection process (S300) of whether the wireless LAN signal interferes with the advanced BS digital broadcast signal, the wireless transmission / reception unit 181 does not output the wireless LAN. In either case. When the wireless transmission / reception unit 181 does not output the wireless LAN, the detection process started in S300 is for channels 10, 12, and 14 of the advanced BS digital broadcast signal received by the BS digital broadcast tuner 102-1. The detection process is based on the assumption that the wireless LAN is output during reception.

The detection unit 151 instructs the wireless transmission / reception unit 181 to maximize the transmission output of the wireless LAN.

Upon receiving an instruction from the detection unit 151, the wireless transmission / reception unit 181 sets to maximize the transmission output of the wireless LAN (S301). The detection unit 151 issues an instruction to maximize the transmission output of the wireless LAN to the wireless transmission / reception unit 181, and then sends an instruction to the measurement unit 110 to the advanced BS digital broadcast signal received by the BS digital broadcast tuner 102-1. Instructs to measure the bit error rate (BER) and / or carrier-to-noise ratio (CN ratio).

Upon receiving the instruction from the detection unit 151, the measurement unit 110 measures the bit error rate (BER) and / or carrier-to-noise ratio (CN ratio) of the advanced BS digital broadcast signal received by the BS digital broadcast tuner 102-1. (S302), and the detection unit 151 is notified of this result.

The detection unit 151 determines the reception environment of the broadcast wave of the advanced BS digital broadcast by comparing the BER and / or CN ratio values notified from the measurement unit 110 with a preset threshold value (S303).

As a result of the determination of S303, when the reception environment of the broadcast wave is good (Yes of S303), the detection unit 151 determines that the wireless LAN signal does not interfere with the advanced BS digital broadcast signal, and has an internal status. The advanced BS digital broadcast signal is set (S304) without interference from the wireless LAN signal, and the process is terminated (S305).

As a result of the determination of S303, when the reception environment of the broadcast wave is not good (No of S303), the detection unit 151 determines that the signal of the wireless LAN may be interfering with the advanced BS digital broadcast signal, and further. Continue the detection process.

The detection unit 151 sets the transmission output of the wireless LAN to OFF (S306), and the bit error rate (BER) of the advanced BS digital broadcast signal received by the BS digital broadcast tuner 102-1 with respect to the measurement unit 110. And or instruct to measure the carrier-to-noise ratio (CN ratio).

Upon receiving the instruction from the detection unit 151, the measurement unit 110 determines the bit error rate (BER) and / or carrier-to-noise ratio (CN ratio) of the advanced BS digital broadcast signal received by the BS digital broadcast tuner 102-1. The measurement is performed (S307), and the result is notified to the detection unit 151.

The detection unit 151 determines the reception environment of the broadcast wave of the advanced BS digital broadcast by comparing the BER and / or CN ratio values notified from the measurement unit 110 with a preset threshold value (S308).

As a result of the determination of S308, when the reception environment of the broadcast wave is good (Yes of S308), the detection unit 151 determines that the wireless LAN signal is interfering with the advanced BS digital broadcast signal, and has an internal status. The advanced BS digital broadcast signal is set to have interference due to the wireless LAN signal ( S310 ), and the process is terminated (S305).

As a result of the determination of S308, when the reception environment of the broadcast wave is not good (No of S308), the detection unit 151 determines that the wireless LAN signal does not interfere with the advanced BS digital broadcast signal, and determines the internal status. , The advanced BS digital broadcast signal is set without interference by the wireless LAN signal ( S304 ), and the processing is completed (S305).

As a condition for the control unit 150 to instruct the detection unit 151 to start the processing of the S300, the BS digital broadcasting tuner 102-1 receives any of the 10 channels, 12 channels, and 14 channels of the advanced BS digital broadcasting signal. It is said that this is the case, but it is not limited to this. For example, the control unit 150 may instruct the detection unit 151 when the BS digital broadcasting tuner 102-1 is receiving any channel of the advanced BS digital broadcasting signal without limiting the channel. Alternatively, the control unit 150 may instruct the detection unit 151 only when it is confirmed that the BS digital broadcasting tuner 102-1 has received a specific channel, for example, 12 channels of the advanced BS digital broadcasting signal. Alternatively, for example, the control unit 150 instructs the detection unit 151 when the broadcast signal receiving device 100 receives any of the 10 channels, 12 channels, and 14 channels of the advanced BS digital broadcasting signal for the first time after the initial setting. May be good.

Next, a process of adjusting the transmission output of the wireless LAN performed by the wireless transmission / reception unit 181 when interference is detected, which is the second step, will be described.

FIG. 4 shows a processing flow for adjusting the transmission output of the wireless LAN performed by the wireless transmission / reception unit 181 when it is detected in the processing flow of FIG. 3 that the signal of the wireless LAN interferes with the advanced BS digital broadcast signal. This is just one example.

When the detection unit 151 has an internal status that the advanced BS digital broadcast signal interferes with the wireless LAN signal, the detection unit 152 notifies the adjustment unit 152 to that effect, so that the adjustment unit 152 transmits and outputs the wireless transmission / reception unit 181. The adjustment of (S400) is started.

The adjusting unit 152 determines whether or not the value set for the transmission output of the wireless LAN is stored (stored) in the memory 153 (S401).

As a result of the determination of S401, when it is stored in the memory 153 (Yes of S401), the adjusting unit 152 instructs the wireless transmission / reception unit 181 to set the value stored in the memory 153 as the transmission output of the wireless LAN. .. Upon receiving an instruction from the adjusting unit 152, the wireless transmission / reception unit 181 sets the instructed value as the output of the wireless LAN (S402).

As a result of the determination of S401, when it is not stored in the memory 153 (No of S401), the adjusting unit 152 instructs the wireless transmission / reception unit 181 to set the maximum value that can be set as the transmission output of the wireless LAN. The wireless transmission / reception unit 181 instructed by the adjustment unit 152 sets the maximum value that can be set as the output of the wireless LAN (S410).

Next, the adjusting unit 152 measures the bit error rate (BER) and / or the carrier-to-noise ratio (CN ratio) of the advanced BS digital broadcasting signal received by the BS digital broadcasting tuner 102-1 with respect to the measuring unit 110. Instruct to do.

Upon receiving the instruction from the adjusting unit 152, the measuring unit 110 receives the bit error rate (BER) and / or carrier-to-noise ratio (CN ratio) of the broadcast signal of the advanced BS digital broadcasting received by the BS digital broadcasting tuner 102-1. Is measured (S403), and the result is notified to the adjusting unit 152.

The adjusting unit 152 determines the reception environment of the broadcast wave by comparing the notified BER and / or CN ratio values with the preset threshold values (S404).

As a result of the determination of S404, when the reception environment of the broadcast wave is not good (No of S404), the adjusting unit 152 determines whether or not the current transmission output setting value is the lower limit in order to reduce the transmission output of the wireless LAN. Is determined (S412).

As a result of the determination of S412, when the transmission output is not the lower limit value (No of S412), the adjusting unit 152 lowers the transmission output by Xdb (S411). Here, X is a predetermined value. After that, the transmission output continues to be lowered by Xdb until the reception environment of the broadcast wave becomes good (Yes in S404) or until the set value of the transmission output reaches the lower limit (Yes in S412).

As a result of the determination in S404, when the reception environment of the broadcast wave is good (Yes in S404), the adjusting unit 152 subsequently fine-tunes the transmission output.

The adjusting unit 152 fine-tunes the transmission output as follows.

When the adjusting unit 152 determines that the broadcast wave reception environment is good and the transmission output of the wireless LAN can be increased as much as possible (the margin of the broadcast wave reception environment is sufficient) (Yes in S405), the adjustment unit 152 determines the transmission output. Raise only Ydb (S413).

In this way, the adjusting unit 152 minimizes the margin of the broadcast wave reception environment by repeating the process of lowering the transmission output of S411 by Xdb (S411) and the process of increasing the transmission output by Ydb (S413) (S405). No) Can be done.

The value of X in the processing of S411 and the value of Y in the processing of S413 may be any value, but it is desirable that X and Y are different. This is to minimize the margin of the broadcast wave reception environment.

When the margin of the broadcast wave reception environment becomes insufficient (the margin becomes the minimum) (No in S405), the adjusting unit 152 saves the value set as the transmission output at this time and the value of the modulation parameter in the memory 153. (S408), the process is terminated (S409).

As a result of the determination of S412, when the transmission output is the lower limit value (Yes of S412), the adjusting unit 152 changes the modulation parameter in order to change the modulation method in order to make it possible to further reduce the transmission output. Is possible or not (S414). Even if the transmission output reaches the lower limit in a certain modulation method, if the broadcast wave reception environment is not good (YES in S412), it is possible to further reduce the transmission output by changing the modulation method. As a result, the broadcast wave reception environment may be in a good state (Yes in S404).

When the modulation parameter can be changed as a result of the determination of S414 (Yes of S414), the adjusting unit 152 changes the parameter on the transmitting side in order to make it possible to further reduce the transmission output. Instruct the wireless transmission / reception unit 181.

Upon receiving the instruction from the adjusting unit 152, the wireless transmission / reception unit 181 changes the parameter on the transmission side (S415) in order to make it possible to further reduce the transmission output, and outputs the wireless LAN.

As a result of the determination of S414, when it is not possible to change the modulation parameter (No of S414), the adjusting unit 152 stops lowering the transmission output and stores the value of the transmission output set in the wireless transmission / reception unit 181 in the memory. It is saved in 153 (S408) and the process is terminated (S409).

Here, changing the modulation parameters of S414 and S415 means changing to a modulation method capable of a lower transmission speed. The modulation parameter is changed, for example, from 64QAM (Quadrature Amplitude Modulation) to 16QAM or QPSK (Quadrature Phase Shift Keying).

As described above, the broadcast signal receiving device 100 of the present embodiment can detect whether or not the wireless LAN signal is interfering with the advanced BS digital broadcast signal by measuring the actual environment. Therefore, for example, BS. Compared to the case where the transmission output of the wireless LAN is controlled only by looking at the channel number of the advanced BS digital broadcasting signal received by the digital broadcasting tuner 102-1, the transmission output of the wireless LAN can be controlled more appropriately and finely. It will be possible.

For example, the wireless transmission / reception unit 181 may be connected to the Internet via a mobile wireless LAN router owned by the user. Alternatively, it is also conceivable that the user is connected to a network such as the Internet via the mobile terminal by using the tethering function of the mobile terminal such as a smartphone or tablet owned by the user.

In such a case, it is assumed that the wireless environment between the wireless transmission / reception unit 181 and the mobile wireless LAN router or between the mobile terminal changes significantly depending on the movement of the user. The broadcast signal receiving device 100 of the present embodiment is particularly effective when such a wireless environment changes significantly. That is, since the broadcast signal receiving device 100 of the present embodiment can determine the actual receiving environment of the advanced BS digital broadcasting and adaptively determine the transmission output of the wireless LAN, when the wireless environment changes significantly. However, it is possible to determine the optimum wireless LAN transmission output.

Further, the broadcast signal receiving device 100 of the present embodiment is a detection process for detecting whether or not a wireless LAN signal is interfering with an advanced BS digital broadcast signal, which is the first step, and / or a second step. The adjustment process of the transmission output of the wireless LAN may be operated based on other information. The broadcast signal receiving device 100 may activate the detection process and / or the adjustment process based on the recording reservation information registered in the recording reservation list, for example.

FIG. 5 is an example of a recording reservation list. The vertical axis is time, the horizontal axis is channel, and the displayed program indicates that the program is the target of recording reservation. Within the range displayed in this figure, it is shown that, for example, 12 programs are the programs to be reserved for recording. For example, program 511 indicates that the program XXXXXXXXX, which is broadcast on the channel "BBBBBB" 501 from 8:00 pm to 9:00 pm, is reserved for recording. Here, it is assumed that the channel "BBBBBB" 501 is a channel for advanced BS digital broadcasting, and all others are not channels for advanced BS digital broadcasting. Further, it is assumed that the current time is 7:00 pm.

In this case, the broadcast signal receiving device 100 may activate the detection process and / or the adjustment process before the recording of the program 511 is started, based on the information registered in the recording reservation list. As a result, the broadcast signal receiving device 100 can start the adjustment process with a margin longer than the time required for the adjustment process before the recording of the program 511 is started. As a result, the broadcast signal receiving device 100 can set the optimum wireless LAN output for recording the advanced BS digital broadcast program shown in the program 511.

When recording a program, the user often does not watch the program reserved for recording at the same time, so that the user does not notice that the reception environment of the broadcast wave when the broadcast signal receiving device 100 starts recording is bad. , Recording may continue. Therefore, before starting recording, it is very important to detect whether the wireless LAN signal interferes with the advanced BS digital broadcasting signal and, in some cases, adjust the transmission output of the wireless LAN.

The broadcast signal receiving device 100 always detects whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal, which is the first step, when recording a program of the advanced BS digital broadcast. And / or the second step, the adjustment process of the transmission output of the wireless LAN may be operated. Alternatively, is the broadcast signal receiving device 100 interfering with the advanced BS digital broadcasting signal, which is the first step, only when recording the first advanced BS digital broadcasting program of the day? The detection process for detecting the presence or absence and / or the adjustment process for the transmission output of the wireless LAN, which is the second step, may be operated. Alternatively, the broadcast signal receiving device 100 detects whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal, which is the first step, only when the electronic program guide is acquired for the first time in the day. The detection process and / or the second step, the adjustment process of the transmission output of the wireless LAN, may be operated. Alternatively, in the broadcast signal receiving device 100, the wireless LAN signal interferes with the advanced BS digital broadcast signal, which is the first step, only when the first advanced BS digital broadcast program is recorded after a certain period of time has elapsed. You may operate the detection process for detecting whether or not the signal is generated and / or the process for adjusting the transmission output of the wireless LAN, which is the second step.

The broadcast signal receiving device 100 may start the detection process and / or the adjustment process based on the recording reservation information, for example, by confirming the transition of the change in the transmission output of the wireless LAN of the wireless transmission / reception unit 181.

Further, the broadcast signal receiving device 100 of the present embodiment detects whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal, which is the first step, by using a menu screen that can be operated by the user, for example. The user may operate the processing and / or the second step, the adjustment processing of the transmission output of the wireless LAN, at any timing.
Further, the setting menu that can be operated by the user may be provided with a function of resetting the value of the transmission output saved in the memory 153 in S408 of FIG. For example, the broadcast wave reception environment of advanced BS digital broadcasting often changes when the layout of the broadcast signal receiving device 100 is changed, the router is arranged or the model is changed, or the vehicle is moved. In such a case, by resetting the value of the transmission output stored in the memory 153, whether or not the wireless LAN signal interferes with the advanced BS digital broadcast signal, which is the first step from the beginning, is checked again. It is desirable to perform the detection process for detection and / or the adjustment process for the transmission output of the wireless LAN, which is the second step. In this way, the user-operable setting menu has various functions corresponding to various cases of changes in the broadcast wave reception environment of the advanced BS digital broadcast of the broadcast signal receiver 100, which is convenient for the user. Can be improved.

Although some embodiments of the present invention have been described, these embodiments are presented 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 variations 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. Furthermore, in each of the constituent elements of the claim, even if the constituent elements are divided and expressed, or a plurality of the constituent elements are expressed together, or even if they are expressed in combination, it is within the scope of the present invention. Further, a plurality of embodiments may be combined, and an example composed of these combinations is also within the scope of the invention.

Further, the drawings may be represented schematically as compared with actual embodiments in order to clarify the explanation, but the drawings are merely examples and do not limit the interpretation of the present invention. Further, in the present specification and each figure, the same reference reference numerals may be given to the components exhibiting the same or similar functions as those described above with respect to the above-mentioned figures, and the overlapping detailed description may be omitted as appropriate. .. Further, the apparatus of the present invention is applied even when the claim is expressed as a control logic, when it is expressed as a program including an instruction for executing a computer, and when it is expressed as a computer-readable recording medium in which the instruction is described. be. Further, the names and terms used are not limited, and other expressions are included in the present invention as long as they have substantially the same content and the same meaning.

100 ... Broadcast signal receiver, 102-1 ... BS digital broadcast tuner, 110 ... Measurement unit, 151 ... Detection unit, 152 ... Adjustment unit, 181 ... Wireless transmission / reception unit.

Claims (5)

A broadcast signal receiver that is capable of wireless communication and receives broadcast signals.
A wireless transmission / reception unit that performs the wireless communication using the first frequency band,
A tuner that receives a broadcast signal transmitted using the first frequency band and the second frequency band that is at least partially covered.
A measuring unit that measures the quality of the broadcast signal when the tuner receives the broadcast signal transmitted using the second frequency band.
By changing the output of the wireless transmission / reception unit, a detection unit that detects whether or not the output of the wireless transmission / reception unit interferes with the broadcast signal by using the change in the quality of the broadcast signal measured by the measurement unit. When,
When it is determined that the output of the wireless transmission / reception unit interferes with the broadcast signal, it is provided with an adjustment unit that adjusts the transmission output of the wireless transmission / reception unit in a downward direction.
When the transmission output of the wireless transmission / reception unit is maximized and minimized, the detection unit uses the change in the quality of the broadcast signal measured by the measurement unit so that the output of the wireless transmission / reception unit becomes the broadcast signal. Determine if it is interfering,
Broadcast signal receiver. The adjusting unit uses a change in the quality of the broadcast signal measured by the measuring unit, which is changed by the wireless transmitting / receiving unit lowering the transmitting output at an arbitrary price and raising the transmitting output at an arbitrary price as needed. Determining the optimum value of the transmission output of the wireless transmitter / receiver.
The broadcast signal receiving device according to claim 1. Since the adjusting unit can further reduce the transmission output, it is possible to change the modulation parameter of the wireless communication.
The broadcast signal receiving device according to claim 1. In the broadcast signal reception method that enables wireless communication and receives broadcast signals,
When the broadcast signal transmitted using the first frequency band used by the wireless communication and the second frequency band covered by at least a part thereof is received, the broadcast received while changing the output of the wireless communication. By measuring the signal quality, it is determined whether or not the output of the wireless communication interferes with the broadcast signal.
A method of adjusting the output of the wireless communication in a direction of lowering the output of the wireless communication when it is determined that the output of the wireless communication interferes with the broadcast signal.
In the above determination, whether or not the output of the wireless communication interferes with the broadcast signal by using the change in the quality of the broadcast signal to be measured when the transmission output of the wireless communication is maximized and minimized. Broadcast signal reception method to judge . The broadcast signal receiving method according to claim 4, wherein in the adjustment, the modulation parameter of the wireless communication can be changed so that the transmission output can be further reduced .

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