JP2015023383A - Receiving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiving device which can provide information about more reception states in addition to information about whether or not the quality of a signal is enough.SOLUTION: A receiving device 1 includes: a channel selection processing part 5 which performs channel selection processing of a received signal; a CN ratio detection part 9 for detecting CN ratio of the received signal; an RFAGC circuit part 7 for generating RFAGC voltage to control signal gain before the channel selection processing; an IFAGC circuit part 8 which controls signal gain after the channel selection processing; a control unit 11 for detecting the RFAGC voltage and IFAGC voltage; and a Packet error detection part 10 for detecting error information from a signal after the channel selection processing. On the basis of at least either the RFAGC voltage, the IFAGC voltage, or the error information, and the CN ratio, a reception state of the signal is examined.

Description

  The present invention relates to a receiving apparatus.

  An electric device such as a television receiver or a recorder is provided with a receiving device that receives a broadcast signal. Some receiving apparatuses can detect the quality of a received signal and display it on a screen. Such a conventional receiving apparatus is disclosed in Patent Document 1, for example.

  The conventional broadcast receiving apparatus described in Patent Document 1 includes reception quality detection means for detecting the reception quality of a received signal, and sequentially measures the reception signal quality of each reception channel in the antenna adjustment mode. Each received channel and its measurement result are displayed in a list on the screen in association with each other. As a result, the user can check the reception status of a plurality of channels on the received signal quality display screen.

JP 2007-104365 A

  However, the conventional receiving apparatus can only determine whether or not the signal quality is sufficient on the received signal quality display screen. Furthermore, even if it can be determined that the signal quality is suitable on the display screen, there is a possibility that problems such as block noise may occur. In this case, there is a concern that the user cannot grasp where the problem has occurred. As a result, there is a possibility that the user purchases auxiliary equipment that is not originally required such as a reception booster.

  The present invention has been made in view of the above points, and obtains a receiving apparatus capable of providing information related to more reception states in addition to information on whether or not the signal quality is sufficient. For the purpose.

  In order to solve the above problems, a receiving apparatus of the present invention includes a channel selection processing unit that performs channel selection processing on a received signal, and a CN ratio detection unit that detects a CN ratio (Carrier to Noise ratio) of the received signal. A first signal control circuit unit that generates a first signal control voltage for controlling the gain of the signal before the channel selection processing by the channel selection processing unit, and the signal after the channel selection processing by the channel selection processing unit A second signal control circuit unit for generating a second signal control voltage for controlling the gain, a control voltage detection unit for detecting the first signal control voltage and the second signal control voltage, and a channel selection by the channel selection processing unit An error information detector that detects error information from the processed signal, and based on at least one of the first signal control voltage, the second signal control voltage, and the error information, and the CN ratio Perform a reception check of the signal It is characterized by that.

  According to this configuration, the reception apparatus performs a signal reception state investigation based on a plurality of targets such as a CN ratio, a first signal control voltage, a second signal control voltage, and error information. Therefore, it is possible to examine the signal reception state from various angles.

  In the receiving device having the above configuration, when the CN ratio is less than a predetermined value, it is determined that the signal level is not appropriate based on the second signal control voltage being out of a predetermined range, and the first signal control voltage is further determined. It is determined that the signal is a strong input or a weak input based on a signal control voltage being out of a predetermined range, and the error information is out of a predetermined range regardless of the value of the CN ratio. The check of the reception status of the signal is performed by determining that the signal is disturbed in the signal path.

  According to this configuration, the receiving apparatus determines whether or not the quality of the received signal is sufficient from the value of the CN ratio. Further, the receiving device determines that the signal level is not appropriate from the value of the second signal control voltage. Further, the receiving apparatus determines that the signal is a strong input or a weak input from the value of the first signal control voltage. Further, since the error information of the signal is outside the predetermined range, the receiving apparatus determines that the signal is disturbed in the signal path.

  The receiving device having the above-described configuration further includes a display unit that displays a result of the investigation and information for solving a problem related to reception of the signal based on the result of the investigation.

  According to this configuration, the user can easily grasp the reception state of the signal, a problem related to reception, and information for solving the problem.

  Further, in the receiving apparatus having the above configuration, after performing the investigation of the reception state of the signal, the channel selection processing unit changes the signal to another channel, and the reception state of the changed signal of the other channel The above-mentioned investigation is performed.

  According to this configuration, the signal reception state is investigated for a plurality of channels. Therefore, the user can grasp the reception state of the signal and the trouble related to reception in a plurality of channels.

  The receiving apparatus having the above-described configuration further includes a channel search unit that performs a search for a receivable channel, and after receiving a search for a receivable channel by the channel search unit, receives the signal of the receivable channel. It is characterized by carrying out the examination of the state.

  According to this configuration, the signal reception state is investigated for a plurality of channels. Therefore, the user can grasp the reception state of the signal and the trouble related to reception in a plurality of channels.

  According to the configuration of the present invention, it is possible to obtain a receiving apparatus capable of providing information related to a larger number of reception states in addition to information indicating whether the signal quality is sufficient.

It is a block diagram of the receiver of 1st Embodiment of this invention. It is a flowchart which shows the inspection process of the receiving condition of the broadcast signal of the receiver of 1st Embodiment of this invention. It is explanatory drawing for demonstrating the example of a display of the investigation result of the reception state in the receiver of 1st Embodiment of this invention. It is explanatory drawing for demonstrating the example of a display of the investigation result of the reception state in the receiver of 1st Embodiment of this invention. It is explanatory drawing for demonstrating the example of a display of the investigation result of the reception state in the receiver of 1st Embodiment of this invention. It is explanatory drawing for demonstrating the example of a display of the investigation result of the reception state in the receiver of 1st Embodiment of this invention. It is explanatory drawing for demonstrating the example of a display of the investigation result of the reception state in the receiver of 1st Embodiment of this invention. It is a flowchart which shows the inspection process of the receiving condition of the broadcast signal of the receiver of 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, a television broadcast receiving apparatus will be described as an example of the receiving apparatus of the present invention, and its embodiment will be described.

  First, the configuration of the receiving apparatus according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of a receiving apparatus.

  As shown in FIG. 1, the receiving apparatus 1 includes a high frequency amplifier 3, an attenuator 4, a channel selection processing unit 5, an intermediate frequency amplifier 6, an RFAGC circuit unit 7 (first signal control circuit unit), and an IFAGC circuit unit 8 (second circuit). A signal control circuit unit), a CN ratio detection unit 9, a packet error detection unit 10 (error information detection unit), a control unit 11 (control voltage detection unit), a storage unit 12, and a display unit 13. For example, a high-frequency broadcast signal transmitted from a broadcasting station is received by the antenna 101 and input to the receiving device 1.

  The broadcast signal received by the antenna 101 is input to the channel selection processing unit 5 via the high frequency amplifier 3 and the attenuator 4. The high frequency amplifier 3 amplifies the input broadcast signal. The attenuator 4 attenuates the input broadcast signal with an attenuation rate based on the output of the RFAGC circuit unit 7.

  The channel selection processing unit 5 includes a local oscillator 5a and a mixer 5b. The local oscillator 5a inputs, to the mixer 5b, a local oscillation signal for converting a broadcast signal received by the antenna 101 and input to the mixer 5b into a predetermined frequency band. The mixer 5 b mixes two input signals to generate an intermediate frequency broadcast signal, and outputs it to the intermediate frequency amplifier 6. The intermediate frequency amplifier 6 amplifies the input broadcast signal with an amplification factor based on the output of the IFAGC circuit unit 8.

  The RFAGC circuit unit 7 as the first signal control circuit unit controls the attenuation amount of the broadcast signal by the attenuator 4 so that the high-frequency signal level output from the attenuator 4 is constant. That is, the RFAGC circuit unit 7 generates and controls the RFAGC voltage (first signal control voltage) for controlling the gain of the broadcast signal before the channel selection processing by the channel selection processing unit 5. The control method by the RFAGC circuit unit 7 is not limited to the above, and there is also a method for controlling the gain of the amplifier. In recent years, the RFAGC circuit section may have a multi-stage configuration in accordance with the trend toward IC integration.

  The IFAGC circuit unit 8 which is the second signal control circuit unit controls the amplification factor of the broadcast signal by the intermediate frequency amplifier 6 so that the signal level of the intermediate frequency output from the intermediate frequency amplifier 6 becomes constant. That is, the IFAGC circuit unit 8 generates and controls an IFAGC voltage (second signal control voltage) that controls the gain of the broadcast signal after the channel selection processing by the channel selection processing unit 5. The control method by the IFAGC circuit unit 8 is not limited to the above, and there is a method in which an attenuator is newly provided after the intermediate frequency amplifier 6 to control the attenuation rate.

  A signal is input to the CN ratio detection unit 9 from the intermediate frequency amplifier 6 via an A / D conversion unit, a synchronization unit, and other components not shown. The CN ratio detection unit 9 detects a CN ratio (Carrier to Noise ratio) of a broadcast signal.

  A broadcast signal is input from the CN ratio detection unit 9 via an error correction unit (not shown) to the packet error detection unit 10 which is an error information detection unit. The packet error detection unit 10 detects error information from the broadcast signal after error correction.

  The control unit 11 includes a calculation unit (not shown) and other electronic components. The control unit 11 obtains information from each component of the receiving device 1 based on a program and data stored and input in the storage unit 12 and the like and A series of broadcast signal reception processing is realized by controlling the operation. The control unit 11 also has a function as a control voltage detection unit that detects the RFAGC voltage and the IFAGC voltage. The control unit 11 receives information related to the CN ratio of the broadcast signal from the CN ratio detection unit 9 and receives error information of the broadcast signal from the packet error detection unit 10.

  The display unit 13 displays an image obtained from the broadcast signal. Furthermore, the display unit 13 displays information regarding the reception state of the broadcast signal output from the control unit 11 and reception failure, and information for solving the failure.

  Then, the receiving device 1 having the above-described configuration performs an examination of the reception state of the broadcast signal. In the investigation of the reception state of the broadcast signal, the CN ratio detected by the CN ratio detection unit 9 is first confirmed. When the CN ratio is less than the predetermined value, the receiving apparatus 1 determines that the signal level is not appropriate based on the IFAGC voltage detected by the control unit 11 being outside the predetermined range. Further, when the CN ratio is less than a predetermined value, the receiving apparatus 1 determines that the broadcast signal is a strong input or a weak input based on the fact that the RFAGC voltage detected by the control unit 11 is outside the predetermined range. Further, the receiving device 1 determines that the broadcast signal is disturbed in the signal path based on the fact that the error information detected by the packet error detecting unit 10 is outside the predetermined range regardless of the value of the CN ratio. Then, the receiving device 1 displays on the display unit 13 the investigation result of the reception state of the broadcast signal and information for solving the problem related to the reception of the signal based on the investigation result.

  The broadcast signal reception state investigation process in the receiving apparatus 1 will be described with reference to FIGS. 3 to 7 along the flow shown in FIG. FIG. 2 is a flowchart showing the broadcast signal reception state investigation process of the reception device 1, and FIGS. 3 to 7 are explanatory diagrams for explaining display examples of reception state investigation results in the reception device 1.

  When receiving apparatus 1 receives a broadcast signal from antenna 101 (start of FIG. 2), control unit 11 determines whether or not the CN ratio detected by CN ratio detection unit 9 exceeds a predetermined value (step # 101). .

  When the CN ratio is less than the predetermined value (No in Step # 101), the control unit 11 determines whether or not the detected IFAGC voltage is within a predetermined range (Step # 102).

  When the IFAGC voltage is outside the predetermined range (No in Step # 102), the control unit 11 determines whether or not the detected RFAGC voltage is within the predetermined range (Step # 103). When the RFAGC voltage is within the predetermined range (Yes in Step # 103), the control unit 11 determines that the signal level is not appropriate (Step # 104). On the other hand, when the RFAGC voltage is outside the predetermined range (No in Step # 103), the control unit 11 determines that the broadcast signal is a strong input or a weak input (Step # 105). The control unit 11 can also specify whether the broadcast signal is a strong input or a weak input.

  When the CN ratio exceeds a predetermined value (Yes in Step # 101) or the IFAGC voltage is within a predetermined range (Yes in Step # 102), the control unit 11 detects error information detected by the packet error detection unit 10. Is determined to be within a predetermined range (step # 106). When the error information is outside the predetermined range (No in Step # 106), the control unit 11 determines that the broadcast signal is disturbed by the signal path (Step # 107).

  When the error information is within the predetermined range (Yes in Step # 106), the control unit 11 determines that the broadcast signal reception state is appropriate (Step # 108).

  Based on the determination of steps # 104, # 105, # 107 and # 108, the control unit 11 opens the result window 14 on the display unit 13 as shown in FIG. 3 to FIG. Are displayed (step # 109). In the result window 14 showing the examination result of the reception state, for example, defect information that is a determination result and countermeasures that are information for solving the defect are displayed.

  For example, when it is determined in step # 104 that the signal path itself has a defect, as shown in FIG. 3, the display unit 13 displays the defect information and a request for confirming the defect of the wiring equipment as a countermeasure. To do.

  For example, if it is determined in step # 105 that there is a problem that the broadcast signal is a strong input, as shown in FIG. 4, the display unit 13 has the defect information and a request to consider the installation of an attenuator as a countermeasure. Is displayed. Further, for example, when it is determined in step # 105 that there is a problem that the broadcast signal is weak input, the display unit 13 displays the defect information and a request for considering the installation of the booster as shown in FIG. .

  For example, if it is determined in step # 107 that there is a problem that the broadcast signal is disturbed in the signal path, the display unit 13 displays the defect information and the signal path as a countermeasure as shown in FIG. Displays a request to confirm whether a device that emits radio waves is not placed. For example, when it is determined in step # 108 that the reception state of the broadcast signal is appropriate, the display unit 13 displays that the reception state is appropriate as shown in FIG.

  Then, the receiving device 1 ends the broadcast signal reception state investigation process (END in FIG. 2).

  Next, the receiving apparatus of 2nd Embodiment of this invention is demonstrated using FIG. FIG. 8 is a flowchart showing a process for investigating the reception state of the broadcast signal of the receiving apparatus. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 7, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.

  As shown in FIG. 8, when the receiving apparatus 1 of the second embodiment receives a broadcast signal from the antenna 101 (start of FIG. 8), the control unit 11 detects that the CN ratio detected by the CN ratio detection unit 9 exceeds a predetermined value. It is determined whether or not (step # 201).

  When the CN ratio is less than the predetermined value (No in Step # 201), the control unit 11 determines whether or not the detected IFAGC voltage is within the predetermined range (Step # 202), and the determination result is stored in the storage unit 12. (Step # 203). Subsequently, the control unit 11 determines whether or not the detected RFAGC voltage is within a predetermined range (step # 204), and records the determination result in the storage unit 12 or the like (step # 205).

  When the CN ratio exceeds a predetermined value (Yes in Step # 201) or after Step # 205, the control unit 11 determines whether or not the error information detected by the packet error detection unit 10 is within a predetermined range. (Step # 206), and the determination result is recorded in the storage unit 12 or the like (Step # 207).

  Subsequently, the control unit 11 performs a comprehensive determination on the reception state of the broadcast signal based on the determination results recorded in steps # 203, # 205, and # 207 (step # 208). Then, based on the comprehensive determination in step # 208, the control unit 11 displays the broadcast signal reception state investigation result on the display unit 13 (step # 209, see FIGS. 3 to 7).

  Subsequently, the control unit 11 uses the display unit 13 or the like to ask the user whether or not to execute a broadcast signal reception state check process on another channel (step # 210). When the user selects to execute the process of checking the reception state of the broadcast signal on another channel (Yes in Step # 210), the control unit 11 changes the channel (Step # 211), and returns to Step # 201 to return the broadcast signal. Resume the reception status investigation process.

  When the user does not select execution of the broadcast signal reception state investigation process on another channel (No in step # 210), the receiving apparatus 1 ends the broadcast signal reception state investigation process (end of FIG. 8). ).

  Next, a receiving apparatus according to a third embodiment of the present invention will be described. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 7, the description of the drawings and the description thereof will be omitted.

  As a receiving apparatus according to the third embodiment of the present invention, a wireless LAN access point can be mentioned. According to this configuration, the wireless LAN access point performs a reception state check on a signal received via the network. Then, the wireless LAN access point displays a signal reception state investigation result and information for eliminating a problem related to signal reception based on the investigation result on a display unit (not shown).

  As described above, the reception apparatus 1 performs a signal reception state investigation based on a plurality of targets such as a CN ratio, an RFAGC voltage, an IFAGC voltage, and error information. Therefore, it is possible to examine the signal reception state from various angles.

  That is, the receiving apparatus 1 can determine whether the quality of the received signal is sufficient from the value of the CN ratio. Furthermore, the receiving device 1 can determine that the signal level is not appropriate from the value of the IFAGC voltage. Furthermore, the receiving apparatus 1 can determine from the value of the RFAGC voltage that the signal is a strong input or a weak input. Furthermore, since the error information of the signal is outside the predetermined range, the receiving device 1 can determine that the signal is disturbed by the signal path.

  Then, the reception device 1 displays on the display unit 13 the result of investigation on the reception state of the signal and information for solving the problem related to reception of the signal based on the result of investigation. As a result, the user can easily grasp the reception state of the signal, a problem related to reception, and information for solving the problem.

  In addition, the reception device 1 changes the channel after executing the signal reception state check, and executes the reception state check for the changed signal of another channel. As a result, the receiving apparatus 1 can perform an examination of the signal reception state for a plurality of channels. Therefore, the user can grasp the reception state of the signal and the trouble related to reception in a plurality of channels. When a channel whose reception state is deteriorated belongs to a specific frequency band, it can be determined that there is a problem with the antenna 101 or other wiring equipment, for example.

  Note that the change of the broadcast channel can also be applied in the first embodiment. The control unit 11 also has a function as a channel search unit that executes a search for a receivable channel. And after performing the search of the receivable channel by the control part 11 which is a channel search part, you may decide to perform said reception condition investigation about the signal of the receivable channel.

  And according to the configuration of the above embodiment of the present invention, in addition to the information on whether or not the quality of the received broadcast signal is sufficient, it is possible to provide information related to more reception states. 1 can be provided.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention can be used in a receiving apparatus.

DESCRIPTION OF SYMBOLS 1 Receiver 5 Channel selection process part 7 RFAGC circuit part (1st signal control circuit part)
8 IFAGC circuit part (second signal control circuit part)
9 CN ratio detection unit 10 Packet error detection unit (error information detection unit)
11 Control unit (control voltage detection unit, channel search unit)
13 Display section

Claims (5)

A tuning processor that performs tuning processing on the received signal;
A CN ratio detector for detecting a CN ratio (Carrier to Noise ratio) of the received signal;
A first signal control circuit unit for generating a first signal control voltage for controlling the gain of the signal before the channel selection processing by the channel selection processing unit;
A second signal control circuit unit for generating a second signal control voltage for controlling the gain of the signal after the channel selection processing by the channel selection processing unit;
A control voltage detector for detecting the first signal control voltage and the second signal control voltage;
An error information detection unit for detecting error information from the signal after channel selection processing by the channel selection processing unit;
With
A receiving apparatus that performs an examination of a reception state of the signal based on at least one of the first signal control voltage, the second signal control voltage, and the error information, and the CN ratio.   When the CN ratio is less than a predetermined value, it is determined that the signal level is not appropriate based on the second signal control voltage being out of the predetermined range, and the first signal control voltage is out of the predetermined range. Based on the above, it is determined that the signal is a strong input or a weak input, and the signal is disturbed in the signal path based on the fact that the error information is outside a predetermined range regardless of the value of the CN ratio. The receiving apparatus according to claim 1, wherein the examination of the reception state of the signal is executed by determining the above.   The reception according to claim 1, further comprising: a display unit configured to display a result of the investigation and information for solving a problem related to reception of the signal based on the result of the investigation. apparatus.   After executing the investigation of the reception state of the signal, the channel selection processing unit changes the signal to another channel, and executes the investigation of the reception state for the changed signal of the other channel. The receiving device according to any one of claims 1 to 3.   A channel search unit that performs a search for a receivable channel, and after performing a search for a receivable channel by the channel search unit, performing the investigation of the reception state of the signal of the receivable channel. The receiving device according to any one of claims 1 to 3, wherein the receiving device is characterized in that:

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