JP2014160937A - Broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcast receiver having no necessity to allow a user to discriminate whether a first high frequency terminal and a second high frequency terminal are an input terminal or an output terminal.SOLUTION: A HDD recorder 100 includes: a tuner 11 for receiving the input of a broadcast signal and performing channel selection; a first high frequency terminal T1 and a second high frequency terminal T2; changeover units (a distributor 3 and a switch 4) for performing changeover between a first signal route to transmit a broadcast signal to be transmitted from the first high frequency terminal T1 to the tuner 11 and the second high frequency terminal T2 and a second signal route to transmit a broadcast signal to be transmitted from the second high frequency terminal T2 to the tuner 11 and the first high frequency terminal T1; and a route control unit 14c for controlling the changeover units to change over the first signal route and the second signal route on the basis of a comparison result between the reception sensitivities of broadcast signals to be respectively input by the first high frequency terminal T1 and the second high frequency terminal T2.

Description

  The present invention relates to a broadcast receiving apparatus, and more particularly to a broadcast receiving apparatus having a plurality of high frequency terminals.

  In recent years, a broadcast receiving apparatus having a high-frequency input terminal that inputs a broadcast signal that is a high-frequency signal and a high-frequency output terminal that outputs a broadcast signal that is a high-frequency signal has been put into practical use. FIG. 8 shows a general main configuration of such a broadcast receiving apparatus.

The broadcast receiving apparatus shown in FIG. 8 includes an input terminal T _IN , a filter 101, an LNA (Low Noise Amplifier) 102, a distributor 103, a tuner 104, and an output terminal T _OUT . The input terminal T _IN inputs a broadcast signal from a broadcast receiving antenna or STB (Set Top Box) via an input signal cable. The filter 101 performs a suppression process for suppressing frequency components other than the frequency band of the broadcast signal on the signal transmitted from the input terminal T _IN, and transmits the signal after the suppression process to the LNA 102. The LNA 102 amplifies the signal sent from the filter 101 and sends it to the distributor 103. The distributor 103 distributes and transmits the signal transmitted from the LNA 102 to the tuner 104 and the output terminal T _OUT .

Usually, the high frequency input terminal T _IN and the high frequency output terminal T _OUT have the same shape. For this reason, the user may erroneously connect the input signal cable to the high-frequency output terminal T _OUT .

  However, even when the above-described erroneous connection is made, depending on the signal strength, there are cases where broadcast waves are received and image / sound can be output, and the user may misunderstand that the connection is correct. In this state, for example, when a channel is switched and a channel with low signal strength is selected, no image / sound is output. A user who sees this may consider the problem of the broadcast receiving apparatus, for example, and inquire of the service center.

  In relation to the above, when the first signal input / output terminal is used as a signal input terminal, the second signal input / output terminal is used as an output terminal, and the second input / output terminal is used as an input terminal. A signal input / output device configured so that the first signal input / output terminal can be used as an output terminal when used is disclosed and proposed (for example, see Patent Document 1).

JP-A-5-145862

  However, in the configuration of Patent Document 1, a signal detection circuit is provided for each connection terminal, and input / output is switched based on the detection result. For this reason, signal detection circuits are required as many as the number of connection terminals, which leads to a problem that the configuration of the apparatus is complicated and the cost is increased.

  In view of the above situation, an object of the present invention is to have a plurality of high-frequency terminals including a first high-frequency terminal and a second high-frequency terminal, and a user can determine whether the first high-frequency terminal and the second high-frequency terminal are input terminals or output terminals. An object of the present invention is to provide a broadcast receiving apparatus that does not need to be discriminated.

  In order to achieve the above object, a broadcast receiving apparatus of the present invention includes a tuner that receives a broadcast signal and selects a channel, a plurality of high-frequency terminals including a first high-frequency terminal and a second high-frequency terminal, and the first high-frequency terminal. A broadcast signal sent from the first signal path for sending the broadcast signal to the tuner and the second high-frequency terminal, and a broadcast signal sent from the second high-frequency terminal are sent to the tuner and the first high-frequency terminal. The plurality of signal paths are switched based on a result of comparing the reception sensitivity of the broadcast signal input from each of the plurality of high frequency terminals with a switching unit that switches a plurality of signal paths including the second signal path. A path control unit for controlling the switching unit.

  According to this configuration, the first high frequency terminal can be the input terminal and the second high frequency terminal can be the output terminal, or the first high frequency terminal can be the output terminal and the second high frequency terminal can be the input terminal. In addition, since the first signal path and the second signal path are automatically switched, it is not necessary for the user to determine whether the first high-frequency terminal and the second high-frequency terminal are input terminals or output terminals, respectively. This facilitates the connection work between the broadcast receiving apparatus and the signal cable. In addition, it is possible to prevent the user from misunderstanding that there is a problem with the broadcast receiving apparatus even though the broadcast receiving apparatus is normal. Furthermore, since it is not necessary to provide a signal detection circuit for each high-frequency terminal, the cost can be reduced.

  In the broadcast receiving apparatus of the present invention, the path control unit receives a broadcast signal input from each of the plurality of high frequency terminals while a channel setting process for registering a receivable channel is being performed. It is preferable to compare the sensitivities.

  According to this configuration, when the channel setting process is performed, the first signal path and the second signal path are automatically switched. Since the channel setting process is a process that is almost certainly performed in the initial setting, it can be almost surely guaranteed that the switching between the first signal path and the second signal path is performed.

  Further, in the broadcast receiving apparatus of the present invention, the path control unit is configured to perform each of the plurality of high frequency terminals when the first receivable channel is received while the channel setting process is being performed. The reception sensitivity of the input broadcast signal is compared, and when the channel setting process is being performed and the first receivable channel is not received, it is input by each of the plurality of high frequency terminals. More preferably, the reception sensitivity of broadcast signals is not compared.

  According to this configuration, it is possible to prevent comparison of reception sensitivity for all receivable channels. For this reason, the processing time of the input / output switching process can be shortened. Further, when the first receivable channel is received, the reception sensitivities of the broadcast signals input from the first high frequency terminal and the second high frequency terminal are compared, so the second and subsequent receivable channels are received. When done, the first signal path and the second signal path have already been switched appropriately. Therefore, channel setting processing can be performed with appropriate reception sensitivity.

  In the broadcast receiving apparatus of the present invention, the switching unit includes a plurality of diodes for transmitting a broadcast signal, and switches the plurality of signal paths by switching each of the plurality of diodes on / off. preferable.

  According to such a configuration, the size and cost can be reduced as compared with the case where a mechanical switch is used.

  According to the present invention, in a broadcast receiving apparatus having a plurality of high frequency terminals, it is not necessary for the user to determine whether the first high frequency terminal and the second high frequency terminal are input terminals or output terminals. This facilitates the connection work between the broadcast receiving apparatus and the signal cable. In addition, it is possible to prevent the user from misunderstanding that there is a problem with the broadcast receiving apparatus even though the broadcast receiving apparatus is normal.

It is a block diagram which shows the internal structure of the broadcast receiver which concerns on one Embodiment of this invention. It is a figure which shows the structure of each function part for implementing the input / output switching process which concerns on one Embodiment of this invention. It is a figure which shows one structural example of a switch. It is a flowchart which shows an input / output switching process. It is a figure which shows the modification of the broadcast receiver which concerns on one Embodiment of this invention. It is a figure which shows the modification of the broadcast receiver which concerns on one Embodiment of this invention. It is a figure which shows the modification of the broadcast receiver which concerns on one Embodiment of this invention. It is a figure which shows the general principal part structure of the broadcast receiver which has a high frequency input terminal and a high frequency output terminal.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, embodiment shown here is an example and this invention is not limited to embodiment shown here.

<1. Internal configuration>
FIG. 1 is a block diagram showing an internal configuration of an HDD recorder 100 (= an example of a broadcast receiving apparatus) according to an embodiment of the present invention.

  The HDD recorder 100 includes a high-frequency signal input / output unit 10, a tuner 11, a demodulation unit 12, an operation input unit 13, a CPU 14, a RAM 15, a ROM 16, an HDD 17, a communication unit 18, an audio filter 21, an audio decoder 22, a video filter 31, and a video decoder. 32, a data filter 41, a data decoder 42, and an output unit 51.

  The high-frequency signal input / output unit 10 inputs and outputs terrestrial digital TV broadcast signals that are high-frequency signals.

  The tuner 11 performs channel selection on a desired physical channel for the terrestrial digital TV broadcast signal transmitted from the high-frequency signal input / output unit 10. The tuner 11 receives a broadcast wave of a channel instructed to be selected by the user or a channel targeted for reserved recording.

  The demodulator 12 demodulates and error-corrects the selected signal input from the tuner 11 and outputs a TS (Transport Stream). The TS demodulated by the demodulator 12 is given to an audio filter 21, a video filter 31, and a data filter 41, which will be described later.

  The operation input unit 13 includes a remote control light receiving unit that receives an infrared remote control signal output from a remote control transmitter (not shown). The remote control transmitter includes a push button and a touch sensor for giving a channel selection instruction to the HDD recorder 100. The operation input unit 13 includes a main unit operation unit such as a hard key or a touch panel provided in the housing of the HDD recorder 100. The operation input unit 13 generates an operation signal based on a user operation received by either the remote control light receiving unit or the main body operation unit, and outputs the operation signal to the CPU 14. The operation input unit 13 does not necessarily include both the remote control light receiving unit and the main body operation unit, and may include only one of them.

  The CPU 14 is an arithmetic processing device that performs various calculations, processes, and controls. The CPU 14 organically controls the drive of each member of the HDD recorder 100 to control the broadcast reception process and the like. The RAM 15 is used as a work memory for the CPU 14. The ROM 16 stores a control program executed by the CPU 14 and the like.

  The HDD 17 is a magnetic recording medium that records digital data. The HDD 17 records and reads data by rotating the magnetic disk and moving the head by an actuator. In this embodiment, it is mainly used for recording recording data generated from image / audio data included in a broadcast wave.

  The communication unit 18 includes, for example, a communication interface such as a network connection terminal or a wireless LAN board compliant with the IEEE 802.3 standard. The communication unit 18 uses these communication interfaces to connect the HDD recorder 100 to an external device such as a personal computer or a tablet (not shown) to input / output digital signals. As a result, for example, image / sound distribution using the DLNA function, remote operation of the HDD recorder 100 using a tablet, and the like become possible.

  The audio filter 21 extracts only audio data from the TS output from the demodulator 12. The audio decoder 22 decodes the extracted audio data and outputs the decoded digital audio signal to the output unit 51.

  The video filter 31 extracts only video data from the TS output from the demodulator 12. The video decoder 32 decodes the extracted video data and outputs the decoded digital image signal to the output unit 51.

  The data filter 41 extracts data such as transmission parameters, NIT (Network Information Table), program information, and data broadcast from the TS output from the demodulator 12. The data decoder 42 decodes the extracted data. The decrypted data is recorded in the RAM 15 or the like.

  The output unit 51 includes an audio output terminal for connecting an audio device such as a speaker and outputting an audio signal, an image output terminal for connecting a display device such as a liquid crystal panel and outputting an image signal, and the like.

<2. About the configuration of the function section>
Here, the configuration of each functional unit for performing the input / output switching process according to an embodiment of the present invention will be described with reference to FIG. In FIG. 2, the functional blocks illustrated inside the CPU 14 represent functional units realized by the CPU 14 executing a predetermined program.

  As shown in FIG. 2, the input / output switching process of the present embodiment is performed by the high frequency input / output unit 10, the tuner 11, the demodulation unit 12, and the CPU 14. The high frequency input / output unit 10 includes a first high frequency terminal T1, a second high frequency terminal T2, a filter 1, an LNA 2, a distributor 3, and a switch 4. The CPU 14 includes functional blocks of a channel setting unit 14a, a reception sensitivity detection unit 14b, and a path control unit 14c.

  The first high-frequency terminal T1 and the second high-frequency terminal T2 each input or output a terrestrial digital TV broadcast signal that is a high-frequency signal. The first high frequency terminal T1 and the second high frequency terminal T2 are terminals having the same shape.

  The switch 4 sends the terrestrial digital TV broadcast signal sent from the first high-frequency terminal T1 to the filter 1, and sends the terrestrial digital TV broadcast signal sent from the distributor 3 to the second high-frequency terminal T2. The state (see the solid line in FIG. 2), the terrestrial digital TV broadcast signal sent from the second high frequency terminal T2 is sent to the filter 1, and the terrestrial digital TV broadcast signal sent from the distributor 3 is sent to the first high frequency The second state (see the dotted line in FIG. 2) sent to the terminal T1 is switched according to the control by the path control unit 14c.

  The filter 1 performs a suppression process that suppresses frequency components other than the frequency band of the terrestrial digital TV broadcast signal on the signal transmitted from the switch 4, and transmits the signal after the suppression process to the LNA 2. The LNA 2 amplifies the signal sent from the filter 1 and sends it to the distributor 3. The distributor 3 distributes and transmits the signal transmitted from the LNA 2 to the tuner 11 and the switch 4.

  Since the tuner 11, demodulator 12, and CPU 14 have already been described above, description thereof is omitted here.

  The channel setting unit 14a sets a channel to be selected by the tuner 11 according to the operation signal sent from the operation input unit 13 (see FIG. 1) or according to the contents of the reserved recording, and sets the setting information to the tuner 11. Output.

  The reception sensitivity detection unit 14b detects reception sensitivity, that is, the electric field strength of the terrestrial digital TV broadcast signal based on the demodulation result in the demodulation unit 12.

  The path control unit 14c controls the switch 4 based on the detection result of the reception sensitivity detection unit 14b.

  Here, a configuration example of the switch 4 will be described with reference to FIG. In the configuration example shown in FIG. 3, the switch 4 includes diodes D1 to D4, DC blocking capacitors C1 to C8, high frequency blocking inductors L1 to L8, and pull-down resistors R1 to R4.

  A bias voltage V1 is applied to the anode of the diode D1, the cathode of the diode D2, the cathode of the diode D3, and the anode of the diode D4. By not applying the voltage V2, the diodes D1 and D4 are turned on and the diodes D2 and D3 are turned off, so that the switch 4 is in the first state (see the solid line in FIG. 2 and the one-dot chain line in FIG. 3). Can be. Conversely, the bias voltage V1 is not applied to the anode of the diode D1, the cathode of the diode D2, the cathode of the diode D3, and the anode of the diode D4, and the cathode of the diode D1, the anode of the diode D2, the anode of the diode D3, and the diode D4 Since the diodes D1 and D4 are turned off and the diodes D2 and D3 are turned on by applying the bias voltage V2 to the cathode, the switch 4 is switched to the second state (dotted line in FIG. 2 and FIG. 3). (See dotted line).

  In the configuration example shown in FIG. 3, the switching of the path is realized by turning on / off the diode. Therefore, the size and cost can be reduced as compared with the case where a mechanical switch is used.

<3. About I / O switching processing>
Next, input / output switching processing executed by the HDD recorder 100 according to an embodiment of the present invention will be described with reference to the flowchart of FIG.

  The process flow of this embodiment is started when a channel setting process start instruction is detected, which is performed when the HDD recorder 100 is initially set. After the start of this process, in step S110, the channel setting unit 14a switches to the channel setting mode, and the switching control unit 14c sets the switch SW flag to 0.

  Next, the channel setting unit 14a starts receiving a predetermined channel selection channel (step S120). Next, the switching control unit 14c determines whether or not the switching SW flag is 0 (step S130).

  When it is determined in step S130 that the switch SW flag is 0 (meaning that the state of the switch 4 is variable), the path control unit 14c switches the switch 4 to the first state, that is, the first high-frequency terminal. The terrestrial digital TV broadcast signal sent from T1 is sent to the filter 1, and the terrestrial digital TV broadcast signal sent from the distributor 3 is sent to the second high-frequency terminal T2 (step S140).

  In step S150 subsequent to step S140, the tuner 11 attempts reception, and the reception sensitivity detection unit 14b detects reception sensitivity.

  In step S160 following step S150, the path controller 14c sends the terrestrial digital TV broadcast signal sent from the second state, that is, the second high-frequency terminal T2, to the filter 1 in the switch 4 and from the distributor 3. The terrestrial digital TV broadcast signal sent is set to be sent to the first high frequency terminal T1.

  In step S170 following step S160, the tuner 11 attempts reception, and the reception sensitivity detection unit 14b detects reception sensitivity.

  In step S180 following step S170, the CPU 14 determines whether or not reception is possible with at least one of the reception sensitivity detected in step S150 and the reception sensitivity detected in step S170.

  If it is determined that reception is not possible with either the reception sensitivity detected in step S150 or the reception sensitivity detected in step S170, the process proceeds to step S230 described later without performing channel registration.

  When it is determined that at least one of the reception sensitivity detected in step S150 and the reception sensitivity detected in step S170 can be received, the path control unit 14c determines that the reception sensitivity detected in step S150 is higher than the reception sensitivity detected in step S170. It is determined whether it is larger (step S190).

  When it is determined that the reception sensitivity detected in step S150 is larger than the reception sensitivity detected in step S170, the path control unit 14c sets the switch 4 to the first state (step S200). Thereafter, the switch SW flag is changed from 0 to 1 (meaning that the state of the switch 4 is fixed) (step S210).

  On the other hand, when it is determined that the reception sensitivity detected in step S150 is not greater than the reception sensitivity detected in step S170, the path control unit 14c keeps the switch 4 in the second state. The switch SW flag is changed from 0 to 1 (step S210).

  In step S220 following step S210, the CPU 14 registers (stores in a non-volatile manner) the currently received channel in the ROM 16, and proceeds to a process in step S230 described later.

  If it is determined in step S130 that the switch SW flag is not 0, the tuner 11 attempts to receive (step S310), and the CPU 14 determines whether or not reception is possible (step S320). If it is determined in step S320 that reception is possible, the process proceeds to step S220. If it is determined in step S320 that reception is not possible, the process proceeds to step S230.

  In step S230, the CPU 14 determines whether or not there is a next channel. If it is determined that there is a next channel, the channel setting unit 14a sets the next channel as a channel selection channel (step S240), and proceeds to the process of step S120. On the other hand, if it is determined that there is no next channel, the flow process shown in FIG. 4 is terminated.

  According to the present embodiment described above, the HDD recorder 100 transmits from the tuner 11 that receives a broadcast signal and selects a channel, the first high-frequency terminal T1, the second high-frequency terminal T2, and the first high-frequency terminal T1. A first signal path for sending the broadcast signal to the tuner 11 and the second high frequency terminal T2, and a second signal for sending the broadcast signal sent from the second high frequency terminal T2 to the tuner 11 and the first high frequency terminal T1. Based on the result of comparing the reception sensitivities of the broadcast signals input by the switching unit (distributor 3 and switch 4) that switches the signal path and the first high-frequency terminal T1 and the second high-frequency terminal T2, respectively, the first signal A path control unit 14c that controls the switching unit to switch between the path and the second signal path.

  Therefore, the first high frequency terminal T1 can be an input terminal and the second high frequency terminal T2 can be an output terminal, or the first high frequency terminal T1 can be an output terminal and the second high frequency terminal T2 can be an input terminal. In addition, since the first signal path and the second signal path are automatically switched, it is not necessary for the user to determine whether the first high-frequency terminal T1 and the second high-frequency terminal T2 are input terminals or output terminals, respectively. This facilitates the connection work between the HDD recorder 100 and the signal cable. Further, it is possible to prevent the user from misunderstanding that the HDD recorder 100 has a problem even though the HDD recorder 100 is normal. Furthermore, since it is not necessary to provide a signal detection circuit for each high-frequency terminal, the cost can be reduced.

  Further, according to the present embodiment, the path control unit 14c is input by the first high frequency terminal T1 and the second high frequency terminal T2 while the channel setting process for registering receivable channels is being performed. Compare the reception sensitivity of broadcast signals.

  For this reason, when the channel setting process is performed, the first signal path and the second signal path are automatically switched. Since the channel setting process is a process that is almost certainly performed in the initial setting, it can be almost surely guaranteed that the switching between the first signal path and the second signal path is performed.

  Further, according to the present embodiment, the path control unit 14c is performing the channel setting process, and when the first receivable channel is received, the first high frequency terminal T1 and the second high frequency terminal. The reception sensitivities of the broadcast signals input from the respective terminals T2 are compared, and when the channel setting process is being performed and the first receivable channel is not received, the first high frequency terminal T1 and the first high frequency terminal T1 The reception sensitivities of the broadcast signals input from the two high frequency terminals T2 are not compared.

  For this reason, it is possible to prevent comparison of reception sensitivity for all receivable channels. For this reason, the processing time of the input / output switching process can be shortened. Further, when the first receivable channel is received, the reception sensitivities of the broadcast signals input from the first high frequency terminal T1 and the second high frequency terminal T2 are compared, so the second and subsequent receivable channels are compared. Is received, the first signal path and the second signal path have already been appropriately switched. Therefore, channel setting processing can be performed with appropriate reception sensitivity.

  Further, according to the present embodiment, the switch 4 includes the diodes D1 to D4 that transmit the broadcast signal, and switches the first signal path and the second signal path by switching each of the diodes D1 to D4 on / off. Do.

  For this reason, compared with the case where a mechanical switch is used, size reduction and cost reduction can be achieved.

[Other embodiments]
The present invention has been described with reference to the preferred embodiments and examples. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea. be able to.

  For example, the high-frequency signal input or output by the high-frequency terminal is not limited to a terrestrial digital TV broadcast signal. For example, the present invention can also be applied when a high-frequency terminal inputs or outputs a broadcast signal other than a terrestrial digital TV broadcast signal such as a satellite digital TV broadcast signal.

  The broadcast receiving apparatus according to the present invention is not limited to the HDD recorder, and can be applied to all broadcast receiving apparatuses having a plurality of high frequency terminals.

  In the above embodiment, each functional unit related to the input / output switching process of the present invention is realized by executing a predetermined program on an arithmetic processing unit such as a microprocessor. It may be realized by a circuit.

  In the above embodiment, the input / output switching process of the present invention is performed while the channel setting process is being performed, but instead of this or in addition to this, for example, the operation input unit 13 The input / output switching process may be performed when a user operation for ordering the input / output switching process is received.

  Moreover, in the said embodiment, although two high frequency terminals, 1st high frequency terminal T1 and 2nd high frequency terminal T2, are provided, you may have three or more high frequency terminals. In this case, if the high-frequency terminals other than the first high-frequency terminal T1 and the second high-frequency terminal T2 have a different shape from the first high-frequency terminal T1 and the second high-frequency terminal T2, the first high-frequency terminal T1 and the second high-frequency terminal T2 are related. Only switching signal paths is sufficient.

  If the high frequency terminals other than the first high frequency terminal T1 and the second high frequency terminal T2 have the same shape as the first high frequency terminal T1 and the second high frequency terminal T2, the high frequencies other than the first high frequency terminal T1 and the second high frequency terminal T2 are used. It is preferable to switch the signal path for a plurality of high-frequency terminals including the terminals.

  For example, when the third high frequency terminal T3 having the same shape as the first high frequency terminal T1 and the second high frequency terminal T2 is provided, the functions of the distributor 3 and the switch 4 are changed, as shown in FIGS. It is good to switch the signal path. Specifically, the reception sensitivity of the broadcast signal input from the first high-frequency terminal T1 is greater than the reception sensitivity of the broadcast signal input from the second high-frequency terminal T2 and the reception sensitivity of the broadcast signal input from the third high-frequency terminal T3. If it is higher, the signal path shown in FIG. In addition, the reception sensitivity of the broadcast signal input from the second high frequency terminal T2 is higher than the reception sensitivity of the broadcast signal input from the first high frequency terminal T1 and the reception sensitivity of the broadcast signal input from the third high frequency terminal T3. The signal path shown in FIG. In addition, the reception sensitivity of the broadcast signal input from the third high frequency terminal T3 is higher than the reception sensitivity of the broadcast signal input from the first high frequency terminal T1 and the reception sensitivity of the broadcast signal input from the second high frequency terminal T2. The signal path shown in FIG.

1, 101 Filter 2, 102 LNA
3, 103 Divider 4 Switch 10 High-frequency signal input / output unit 11, 104 Tuner 12 Demodulator 13 Operation input unit 14 CPU
14a Channel setting unit 14b Reception sensitivity detection unit 14c Path control unit 14c
15 RAM
16 ROM
17 HDD
DESCRIPTION OF SYMBOLS 18 Communication part 21 Audio filter 22 Audio decoder 31 Video filter 32 Video decoder 41 Data filter 42 Data decoder 51 Output part 100 HDD recorder (an example of broadcast receiver)
C1~C8 DC blocking capacitor D1~D4 diode L1~L8 for high frequency blocking inductor R1~R4 down resistor T1 first high-frequency terminal T2 second frequency terminal T3 third frequency terminal T _IN RF input terminal T _OUT RF output terminal

Claims (4)

A tuner that receives a broadcast signal and selects a channel;
A plurality of high frequency terminals including a first high frequency terminal and a second high frequency terminal;
A first signal path for sending a broadcast signal sent from the first high frequency terminal to the tuner and the second high frequency terminal, and a broadcast signal sent from the second high frequency terminal to the tuner and the first A switching unit for switching a plurality of signal paths including the second signal path to be sent to the high-frequency terminal;
A path control unit that controls the switching unit to switch the plurality of signal paths based on a result of comparison of reception sensitivities of broadcast signals input from the plurality of high-frequency terminals. Broadcast receiving device. The path control unit compares reception sensitivities of broadcast signals input from the plurality of high frequency terminals while channel setting processing for registering receivable channels is being performed. The broadcast receiving apparatus according to claim 1. The route control unit
When the first receivable channel is being received while the channel setting process is being performed, the reception sensitivity of the broadcast signal input by each of the plurality of high frequency terminals is compared,
When the channel setting process is being performed and the first receivable channel is not received, the reception sensitivities of the broadcast signals input by the plurality of high frequency terminals are not compared. The broadcast receiving apparatus according to claim 2. The switching unit is
A plurality of diodes for transmitting broadcast signals;
The broadcast receiving apparatus according to any one of claims 1 to 3, wherein the plurality of signal paths are switched by switching on / off of each of the plurality of diodes.

Images