JP2009278503A - Diversity reception television receiver, and reception method of diversity television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein power is consumed more than required although the reception sensitivity becomes good, when broadcast waves are received by carrier composition diversity. <P>SOLUTION: When broadcast waves are received by diversity, the diversity reception television receiver receives the broadcast waves with an antenna selection method, if the reception sensitivity is proper. But, if the reception sensitivity is not proper, the receiver receives the broadcast waves with carrier composition diversity. In addition, when reception is performed by the carrier composition diversity, an antenna system used for carrier composition is added until a sufficient reception sensitivity is obtained, in order of an antenna with the highest gain at a physical channel for receiving. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a television that performs diversity reception and a reception method thereof.

  In recent years, TVs installed in automobiles and portable TVs are increasingly adopting diversity reception to improve reception sensitivity. There are various diversity systems used in terrestrial digital receivers, and among them, selection diversity for switching between multiple antennas and selecting one antenna with good reception sensitivity, and each signal obtained from multiple antenna systems. Carrier combining diversity, which improves reception sensitivity by OFDM demodulation and carrier combining, is often used, and there are methods such as equal ratio combining and maximum ratio combining.

  Carrier synthesis diversity reception can improve reception sensitivity in a multipath environment, and is therefore useful for portable televisions. On the other hand, it has a problem of high power consumption.

  In order to solve this problem, for example, Patent Document 1 proposes the following method. FIG. 1 illustrates the configuration of an apparatus in Patent Document 1. In the method of Patent Document 1, power consumption is reduced by performing selective diversity reception (single reception) when the reception condition is good, and reception sensitivity is improved by performing reception with carrier combining diversity when the reception condition is bad. The determination of the reception method is performed by the antenna selection unit, and either the selection diversity reception or the carrier combination diversity reception is performed by the selection combining unit according to this determination.

  However, in the above method, the reception situation is poor, and when performing diversity reception by carrier combining, all antenna systems included in the device are used. For example, when there are four antenna systems, reception may be possible without using all of them depending on reception conditions. For this reason, in order to further reduce power, it is important to be able to increase / decrease the number of diversity systems according to reception conditions.

Further, in portable digital TVs and portable devices with a TV reception function, a plurality of antennas for diversity reception are not necessarily the same antenna due to space and design restrictions. Digital terrestrial broadcasting has a wide broadcasting band, and when a plurality of different antennas are used, there is a possibility that the gains or inferiorities between the antennas differ depending on the physical channel. Therefore, even when the number of diversity systems is increased or decreased according to the reception status, the sensitivity cannot be sufficiently improved unless a method that considers antenna characteristics is used.
JP 2006-246364 A

  The problem to be solved by the present invention is to reduce power consumption by receiving using antenna selection diversity when reception conditions are good, and to improve reception sensitivity by using carrier combining diversity when reception conditions are bad. In this case, if diversity reception is performed using all antenna systems at once according to the deterioration of reception sensitivity, power is consumed more than necessary.

  The present invention reduces the power consumption by receiving with antenna selection diversity when the reception condition is good, and the gain of the antenna of the physical channel currently being received in the television receiver that receives with carrier combining diversity when the reception condition is bad The main feature is that the antenna system is selected in order from the highest one and the carrier synthesis diversity reception is performed.

  In the diversity reception television of the present invention, as the reception situation deteriorates, an antenna having a high gain in the physical channel currently being received can be sequentially added as an antenna system for carrier combining diversity, so that the reception situation deteriorates. Accordingly, the number of antenna systems can be increased efficiently and reception sensitivity can be improved, and an increase in power consumption due to carrier synthesis diversity reception can be suppressed.

  The best mode for carrying out the present invention is to reduce power consumption by receiving with antenna selection diversity when reception conditions are good, and with a portable ground that can be received with carrier combining diversity when reception conditions are bad. In digital TV, antennas with high gain can be added sequentially as an antenna system for carrier combining diversity in the physical channel that is currently being received due to the deterioration of reception conditions, so that reception sensitivity is improved when the field strength is weak. When the electric field strength is strong, it is possible to reduce the power.

(First embodiment)
FIG. 2 is a configuration diagram of the first embodiment of the present invention. 2, 101 to 104 are antennas, 111 to 114 are reception processing means, 121 is a carrier combining means, 122 is an antenna switching means, 123 is a diver system switching means, 124 is an error correction means, 125 is a video / audio decoding means, 126 is an antenna characteristic storage means, 127 is a channel selection means, 128 is a user input means, 129 is an RF control means, 130 is a video display means, and 131 is an audio reproduction means.

  Operations of the diversity receiving television configured as described above will be shown in order. The antenna 101, the antenna 102, the antenna 103, and the antenna 104 are antennas that receive terrestrial digital broadcasting. In this embodiment, the description will be made assuming that there are four antennas. However, the number of antennas is not particularly limited to four, and a plurality of antennas may be used.

  In general, the antenna gain is not flat with respect to frequency. In this embodiment, it is assumed that the frequency characteristics of the four antennas are different as shown in FIG. For example, the antenna gain is higher in the order of the antenna 101, the antenna 102, the antenna 103, and the antenna 104 in the physical channel A, and the antenna gain is higher in the order of the antenna 103, the antenna 102, the antenna 101, and the antenna 104 in the physical channel B.

  As shown in Table 1, the antenna characteristic storage unit 126 stores the superiority or inferiority of the antennas 101 to 104 for each physical channel. The superiority or inferiority of the antenna characteristic in the physical channel indicated by the channel selection control signal is output as antenna characteristic information.

The reception processing unit 111 selects the frequency of the RF signal 1 obtained from the antenna 101 for the physical channel indicated by the channel selection control signal, further performs frequency conversion, AD conversion, and OFDM demodulation, and the result is a demodulated signal. Output as 1. In addition, since the reception processing unit 111 can be switched on and off by the ON control signal 1, when it is not necessary to operate, the power consumption can be reduced by turning off the operation. Similarly to the reception processing unit 111, the reception processing units 112 to 114 output demodulated signals in accordance with the input RF signal, channel selection control signal, and ON control signal.

  The antenna switching means 122 selects one of the demodulated signals 1 to 4 and outputs it as a switching output when the diversity switching signal indicates reception with antenna selection diversity, and the diversity switching signal is the carrier. The operation is stopped when the reception at the combination diversity is indicated.

  The selection of the demodulated signals 1 to 4 when the diversity system switching signal indicates reception with antenna selection diversity is performed when the demodulated signal 1, demodulated signal 2, demodulated signal 3, and demodulated signal 4 are each switched output. This is done by comparing the received information obtained and selecting the demodulated signal that provides the best reception sensitivity. There is no particular limitation on the method of selecting the antenna. For example, a demodulated signal obtained from an antenna having the highest gain in the physical channel for reception may be selected. Further, the antenna switching means 122 outputs which antenna is used for reception as antenna selection information.

  The carrier combining means 121 stops the operation when the diversity system switching signal instructs reception with antenna selection diversity, and when it instructs reception with carrier combining diversity, the carrier combining means 121 performs the following procedure. Performs composite diversity reception.

  From the antenna characteristic information, the antenna having the highest reception sensitivity and the antenna having the second highest reception sensitivity in the physical channel to be received are selected. If reception is performed on the physical channel A, the antenna 101 and the antenna 102 are selected. Since the reception processing means 111 is connected to the antenna 101 and the reception processing means 112 is connected to the antenna 102, carrier synthesis is performed using the demodulated signal 1 and the demodulated signal 2 that have passed through these two systems. Output as composite output. This combined output is processed via a diver system switching means 123 and an error correction means 124 described later, and the reception status is fed back from the error correction means 124 as reception information.

  In this embodiment, it is assumed that a bit error rate is sent as reception information. The error correction unit 124 determines whether or not reception is possible at the present time based on the magnitude of this numerical value. The bit error rate is often used as an indicator of the reception status of digital terrestrial broadcasting. If the bit error rate after Viterbi decoding is 2 × 0.0001 or less in the receiver, error correction can be performed by Reed-Solomon decoding. Pseudo error free. Note that the received information may use the C / N ratio or both the C / N ratio and the bit error rate.

If it is determined from the received information that the necessary reception sensitivity is not obtained, an antenna having the next highest reception sensitivity is selected in this physical channel, and carrier synthesis using three systems is performed. In reception on the physical channel A, a system connected to the antenna 103 is added, and carrier synthesis is performed using the demodulated signal 1, demodulated signal 2, and demodulated signal 3. Then, the result of the carrier synthesis is output to the synthesis output, and the reception status is obtained from the reception information. Further, when the reception sensitivity is not sufficient, the antenna 104 is added to the carrier synthesis. Further, the carrier combining means 121 outputs which antenna is used for carrier combining as carrier combining antenna information. Note that the carrier synthesis method is not particularly limited, and equal ratio synthesis or maximum ratio synthesis may be used.
The error correction unit 124 corrects the error of the diver output and outputs the transport stream as a TS signal. At the same time, the reception status is output as reception information. In this embodiment, this received information is a bit error rate. However, the reception information may be used at the C / N ratio, or both the C / N ratio and the bit error rate may be used.

  Based on the reception status obtained from the reception information, the diversity method switching means 123 outputs a switching output as a diver output in order to perform reception with antenna selection diversity when the reception status is good, and performs reception with antenna selection diversity. The effect is output by a diver system switching signal. On the other hand, when the reception condition is bad, the combined output is output as diversity output in order to perform reception with carrier combining diversity, and a message indicating that reception is performed with carrier combining diversity is output with a diversity switching signal.

  The video / audio decoding unit 125 decodes video, audio, and data included in the TS signal, and outputs the result as a video signal and an audio signal. The video display means 130 displays a video signal. In particular, the display means is not limited. The audio reproduction means 131 reproduces an audio signal. This means is not particularly limited. The video display means 130 and the audio reproduction means 131 are not particularly provided, and there is no problem if only the video signal and the audio signal are output.

  The user input unit 128 is a unit for inputting a user operation on the device, and is generally a remote control or an operation button, but this form is not necessarily limited. In the present embodiment, when a user inputs a channel that the user desires to view, the contents are output as channel selection instruction information. The channel selection unit 127 outputs information on a physical channel to be received based on the channel selection instruction information as a channel selection control signal.

  When the diversity selection information indicates reception with antenna selection diversity, the RF control means 129 controls the ON control signals 1 to 4 based on the antenna selection information, and the diversity selection information is received with carrier combining diversity. , The ON control signals 1 to 4 are controlled based on the carrier combined antenna information. Table 2 shows the operation when reception is performed with antenna selection diversity. As shown in Table 2, when the antenna 101 is selected by the antenna selection information, only the ON control 1 that controls the operation of the reception processing means 111 connected to this antenna is turned on, and the ON control signals 2 to 3 are turned off. And

  Next, the operation when reception is performed with carrier combining diversity will be described. In this case, based on the carrier synthesis antenna information indicating which signal among the demodulated signals 1 to 4 is used for carrier synthesis, when the antenna 101 is used for carrier synthesis, the ON control 1 is turned on, and the antenna 102 is ON control 2 is turned on when used for carrier synthesis, ON control 3 is turned on when antenna 103 is used for carrier synthesis, and ON control 4 is turned on when antenna 104 is used for carrier synthesis. To do. That is, unlike the case of reception with antenna selection diversity, a plurality of signals among ON control 1 to ON control 4 are turned on.

Since such a configuration is adopted, an antenna with a high gain can be added as an antenna system for successive carrier combining diversity in a physical channel that is currently being received due to a deterioration in reception sensitivity. Accordingly, the number of antenna systems can be increased efficiently, and an increase in power consumption due to reception of carrier combining diversity can be suppressed.
In addition, although this Embodiment showed the example of a structure as a terminal which receives a digital television broadcast, the same effect can be acquired also in a radio or a communication apparatus.

(Second embodiment)
FIG. 4 is a block diagram of the second embodiment of the present invention. 4, 101 to 104 are antennas, 111 to 114 are reception processing means, 121 is a carrier combining means, 122 is an antenna switching means, 123 is a diver system switching means, 124 is an error correction means, 125 is a video / audio decoding means, 126 is an antenna characteristic storage means, 127 is a channel selection means, 128 is a user input means, 129 is an RF control means, 130 is a video display means, 131 is an audio reproduction means, 221 to 224 are noise sensors, and 211 to 214 are noise removal devices. Means. Since the components other than the noise removing units 211 to 214 and the noise sensors 221 to 224 are the same in the first embodiment, the description thereof is omitted.

  The noise sensors 221 to 224 are antennas for collecting noise in a digital broadcast frequency band existing inside the device. The shape and location of the noise sensors 221 to 224 are not particularly limited. In the case of being arranged inside the device, a small antenna such as a dielectric antenna or a pattern antenna on a printed board is suitable. The noise sensor 221 outputs the collected noise as noise 1, the noise sensor 222 outputs the collected noise as noise 2, the noise sensor 223 outputs the collected noise as noise 3, and the noise sensor 224 outputs the collected noise. Output as noise 4.

  The noise removing unit 211 cancels the noise component of the noise 1 from the RF signal 1 and outputs it as the RF signal 5. FIG. 5 shows the internal configuration of the noise removal means, and FIG. 6 shows the noise removal. As shown in FIG. 6, the RF signal 1 is obtained by receiving a terrestrial digital broadcast by the antenna 101, and a spectrum of the terrestrial digital broadcast that is a desired wave and a noise component that is an interference wave overlap. Noise 1 is a noise component obtained from the noise sensor 221. For this noise 1, the multiplier 211-b adjusts the amplitude, the phase controller 211-c adjusts the phase amount, and the adder 211-a performs cancellation processing. The adjustment of the amplitude value and the phase amount is performed when the control indicated by the ON control 1 changes from OFF to ON, that is, when the operation of the reception processing unit 111 becomes effective. Further, the amplitude value and the phase amount are adjusted so that the bit error rate included in the received information is minimized. This adjustment algorithm is not particularly limited.

  Similarly to the noise removing unit 211, the noise removing units 212 to 214 perform processing according to the input RF signal, noise, reception information, and ON control signal. In addition, in the noise removal means 211-214, it is not necessary to specifically limit about the cancellation method.

  Since such an embodiment is adopted, an antenna having a high gain in a physical channel that is currently being received due to a deterioration in reception sensitivity is added as an antenna system for successive carrier combining diversity, and when an antenna is added at the same time. Since it removes noise mixed in the antenna system, it is possible to efficiently increase the antenna system as reception sensitivity deteriorates, and to suppress an increase in power consumption due to carrier synthesis diversity reception. In addition, although this Embodiment showed the example of a structure as a terminal which receives a digital television broadcast, the same effect can be acquired also in a radio or a communication apparatus.

(Third embodiment)
FIG. 7 is a configuration diagram of the third embodiment of the present invention. In FIG. 7, 101 to 104 are antennas, 111 to 114 are reception processing means, 321 is a list correspondence carrier combining means, 122 is an antenna switching means, 323 is a list correspondence diver system switching means, 124 is an error correction means, and 125 is an image. Audio decoding means, 126 is antenna characteristic storage means, 327 is list compatible channel selection means, 328 is list compatible user input means, 129 is RF control means, 130 is video display means, 131 is audio reproduction means, 221 to 224 are noise Sensors 311 to 314 are noise removing means with adjustment control, and 331 is a channel list generating means. The second embodiment is implemented except for the list-compatible carrier combining means 321, list-compatible diver system switching means 323, list-compatible channel selection means 327, list-compatible user input means, noise removal means 311 to 314 with adjustment control, and channel list generation means 331. Since it is the same as a form, description is abbreviate | omitted.

  The noise removal means 311 with adjustment control cancels the noise component of the noise 1 from the RF signal 1 and outputs it as the RF signal 5. Since the noise removal method conforms to the noise removal means 211 shown in the second embodiment of the present invention, the difference will be described below. In the noise removing unit 211 shown in the second embodiment, the adjustment of the amplitude value and the delay value for noise removal is performed when the control indicated by the ON control 1 is changed from OFF to ON, that is, the reception processing unit 111 performs the adjustment. This is performed when the operation becomes valid. In the noise removal means 311 with adjustment control, this is performed when the adjustment control signal 1 instructs the adjustment of the amplitude value and the delay value. Further, when the adjustment of the amplitude value and the delay value is finished, the adjusted amplitude value and delay value are held for each current physical channel obtained from the channel selection control signal. Further, when the adjustment control signal 1 does not instruct the adjustment of the amplitude value and the delay value for noise removal, the amplitude value and the delay value in the physical channel are used if they are stored in advance. Cancels noise components.

The noise removal means 312 to 314 with adjustment control also performs the same processing as the noise removal means 311 with adjustment control according to the respective RF signals 2 to 4, noises 2 to 4, and adjustment control signals 2 to 4, and the RF signal Output 6-8.
When the list generation signal indicates the generation of the channel list, the list-corresponding diver method switching unit 323 outputs a message indicating that reception is performed with carrier combining diversity as a diver method switching signal, and outputs the combined output as a diver output. To do. When the list generation signal does not instruct the generation of the channel list, the same processing as the diver system switching means 123 in the second embodiment is performed.

  The list-corresponding carrier combining means 321 stops the operation when the diversity method switching signal instructs reception with antenna selection diversity, and when it instructs reception with carrier combining diversity, the following procedure is performed. Perform carrier synthesis.

  First, when the list generation signal instructs generation of a channel list, carrier synthesis is performed using all antenna systems, and the result is output as a synthesis output. When the list generation signal does not instruct the generation of the channel list, the same processing as the carrier synthesizing unit 121 in the second embodiment is performed.

  The list-corresponding channel selection unit 327 outputs, as a channel selection control signal, information on the physical channel to be received based on the channel selection instruction information and the channel list channel selection instruction information.

  The list-corresponding user input means 328 is a means for inputting a user operation on the device, and is generally a remote control or an operation button, but it is not necessary to limit this form. In the present embodiment, when a user inputs a channel that the user desires to view, the content is output as channel selection instruction information, and when the user inputs acquisition of a channel list that is a list of channels that can be viewed, the content is acquired. Output as an instruction signal.

  When the channel list generation unit 331 is instructed to acquire the channel list by the channel list acquisition instruction signal, the noise removal unit 311 to 314 with adjustment control in each physical channel is instructed to cancel the noise component and whether there is a receivable broadcast service. To create a channel list. FIG. 9 is a flowchart of the operation in the channel list generation means of FIG.

First, when generation of a channel list is instructed by the channel list acquisition instruction signal from the list corresponding user input means 328, step S1 of the flowchart of FIG. 8 is executed.
In step S1, the physical channel for checking the presence / absence of receivable broadcast is notified to the list corresponding channel selection means 327 using the channel list channel selection instruction information. Further, the list generation signal is used to notify the list corresponding carrier synthesizing means 321 and the list corresponding diver system switching means 323 that the channel list generation is in progress. In the present embodiment, it is assumed that the physical channels to be investigated are examined in ascending order, but this order is not particularly limited.

  As described above, when the list generation signal instructs the generation of the channel list, the list corresponding diver system switching means 323 outputs a signal indicating that the reception is performed by the carrier combining diversity by the diver system switching signal, and the combined output is the diver output. In addition, the list-corresponding carrier synthesizing unit 321 performs carrier synthesis using all the antenna systems, and outputs the result as a synthesized output.

  Next, in step S2, the adjustment control signal 1 is used to instruct the noise removal means 311 with adjustment control to adjust the amplitude value and the phase amount for noise removal. If the noise removal means 311 with adjustment control notifies the end signal 1 that the adjustment of the amplitude value and the delay value for noise removal is completed, the process proceeds to step S3. Steps S3, S4, and S5 repeat the same processing in the noise removal means 312 to 314 with adjustment control, and thus description thereof is omitted. When step S5 ends, the process proceeds to step S6.

  In step S6, if there is a receivable broadcast on the current physical channel, the contents are retained. Whether there is a receivable broadcast on the current physical channel is determined based on the received information. Specifically, since a bit error rate is sent as reception information, the determination is made using this numerical value. Bit error rate is often used as an indicator of the reception status of terrestrial digital broadcasting. If the bit error rate after Viterbi decoding is 2 * 10-4 or less in the receiver, error correction can be performed by Reed-Solomon decoding. Pseudo error free.

  Note that the order of processing in steps S2 to S5 is not particularly limited. This order may be different for each physical channel, and the order may be determined based on the antenna characteristics of the antennas 101 to 104.

  In step S7, if the physical channel indicated by the channel list channel selection instruction information is the final channel to be investigated, the process proceeds to step S9, and if not, the process proceeds to step S8.

  In step S8, the physical channel indicated by the channel list channel selection instruction information is changed to the next physical channel to be investigated, and the process proceeds to step S1 again. In step S9, a channel list is generated based on the information regarding the receivable broadcast held in step S6. The method for displaying the generated channel list is not particularly limited. It may be displayed on a part or all of the display area of the video display means 130. Further, it uses the list generation signal to notify the list corresponding carrier synthesizing means 321 and the list corresponding diver system switching means 323 that the work of generating the channel list is completed.

Since such an embodiment is adopted, an antenna having a high gain in a physical channel that is currently being received due to a deterioration in reception sensitivity is added as an antenna system for successive carrier combining diversity, and when an antenna is added at the same time. Since it removes noise mixed in the antenna system, it is possible to efficiently increase the antenna system as reception sensitivity deteriorates, and to suppress an increase in power consumption due to carrier synthesis diversity reception.
In addition, since parameter adjustment for optimizing the noise removal effect is performed in advance when the channel list is generated, the noise removal effect can be immediately obtained even when the reception sensitivity is abruptly deteriorated.

  In addition, although this Embodiment showed the example of a structure as a terminal which receives a digital television broadcast, the same effect can be acquired also in a radio or a communication apparatus. Furthermore, in the present embodiment, the control value adjustment for noise removal is performed when the channel list is generated, but it may be performed during the channel list display period after the channel list is generated.

  The diversity receiving television according to the present invention can sequentially add a high gain antenna as an antenna system for performing carrier combining diversity in a physical channel that is currently being received due to a deterioration in reception sensitivity. Accordingly, the number of antenna systems can be increased efficiently, and an increase in power consumption due to carrier synthesis diversity reception can also be suppressed, which is particularly effective for portable televisions.

Explanatory drawing which showed the structure of the conventional diversity receiver Block diagram of diversity receiving television in the first embodiment Diagram showing frequency characteristics of multiple antennas Block diagram of diversity receiving television in the second embodiment Block diagram showing the functional configuration of the noise removal means Explanatory drawing showing how noise is removed by the noise removal means Block diagram of a diversity receiving television in the third embodiment Flowchart of operation in channel list generation means

Explanation of symbols

101, 102, 103, 104 Antenna 111, 112, 113, 114 Reception processing means 121 Carrier combining means 122 Antenna switching means 123 Diver system switching means 124 Error correction means 125 Video / audio decoding means 126 Antenna characteristic storage means 127 Tuning means 128 User input means 129 RF control means 130 Video display means 131 Sound reproduction means 211, 212, 213, 214 Noise removal means 221, 222, 223, 224 Noise sensors 311, 312, 313, 314 Noise removal means with adjustment control 321 List correspondence Carrier synthesizing means 323 List corresponding diver system switching means 327 List corresponding channel selecting means 328 List corresponding user input means 331 Channel list generating means

Claims (6)

A plurality of antennas for receiving broadcast waves and outputting RF signals;
When connected to each of the plurality of antennas and the on control signal instructs execution of operation, the demodulated signal is subjected to frequency selection, frequency conversion, AD conversion, and OFDM demodulation for the physical channel instructed by channel selection control. A plurality of reception processing means for stopping the operation when the ON control signal instructs to stop the operation,
When the diversity system switching signal indicates reception with antenna selection diversity, one of the plurality of demodulated signals having the best reception status is selected based on the received information, and the diversity system switching signal is carrier combining diversity. Antenna switching means for stopping the operation when instructing reception at
In accordance with the priority order of the plurality of antennas indicated by the antenna characteristic information, signals used for carrier combination are sequentially selected and added from the plurality of demodulated signals until sufficient reception status is obtained based on reception information, and carrier combination is performed. Carrier combining means for outputting, as carrier combining antenna information, which demodulated signal is used among the plurality of demodulated signals;
When receiving with antenna selection diversity or receiving with carrier combining diversity based on the reception status obtained from the received information, output the determination result as a diversity switching signal, and receive with antenna selection diversity If it is determined, the switching output obtained from the antenna switching means is output as a diver output, and if it is determined that reception is performed with carrier combining diversity, the combined output obtained from the carrier combining means is output as a diver output. Diver system switching means to perform,
Error correcting means for error correcting the diver output output from the diver system switching means, outputting the transport stream as a TS signal, and outputting the reception status as reception information;
Video and audio decoding means for decoding video, audio and data contained in the TS signal, and outputting a video signal and an audio signal;
Video display means for displaying the video signal;
Audio reproducing means for reproducing the audio signal;
User input means for outputting the contents as channel selection instruction information when the user inputs a channel desired to be viewed;
Channel selection means for outputting, as channel selection control information, information on a physical channel to be received based on the channel selection instruction information;
When the diversity selection information instructs reception at antenna selection diversity, outputs an instruction to turn on the operation for one of the plurality of reception processing means based on the antenna selection information, When the diversity selection information indicates reception with carrier combining diversity, an instruction to turn on the operation is output to a necessary one of the plurality of reception processing means based on the carrier combining antenna information. RF control means;
Antenna characteristic storage means for holding the superiority or inferiority of the gain of each of the plurality of antennas for each physical channel and outputting the superiority or inferiority of the antenna characteristics in the physical channel indicated by the channel selection control signal as antenna characteristic information Diversity receiving TV. The diversity receiving television according to claim 1,
A plurality of noise sensors that collect noise present inside the device;
When one of a plurality of antennas, one of the plurality of noise sensors, and one of a plurality of reception processing means are connected, and the connected reception processing means is in an operation execution state, The noise component output from the one noise sensor connected to the RF signal output from the one connected antenna is canceled and output, and the canceling amount of the noise component at that time is determined from the received information. A diversity receiving television comprising: a plurality of noise removing units that adjust the obtained reception status to a value that is the best and output the result to a plurality of reception processing units. In the diversity receiving television according to claim 2,
The noise removing means is connected to one of the plurality of antennas, one of the plurality of noise sensors, and one of a plurality of reception processing means, respectively, and when the adjustment control signal instructs the operation start The phase and amplitude of the noise component output from the one noise sensor connected to the RF signal output from the one antenna connected so that the reception status is the best based on the received information. Adjust and add to cancel and output the result, output that the phase and amplitude adjustment is completed as an end signal, and cancel the noise component for each physical channel indicated by the channel selection control signal It is a noise removal means with adjustment control that holds adjustment values of phase and amplitude,
The user input means outputs the contents as channel selection instruction information when the user inputs a channel that the user desires to view, and acquires the channel list when the user inputs acquisition of a channel list that is a list of channels that can be viewed. A list-compatible user input means for outputting as an instruction signal,
The channel selection means is a list corresponding channel selection means for outputting as a channel selection control signal indicating a physical channel to be received based on channel selection instruction information and channel list channel selection instruction information,
The diver system switching means determines that reception is performed by carrier combining diversity when the list generation signal instructs generation of a channel list, and outputs the result as a diver system switching signal. If the generation is not instructed, it is determined whether to receive with antenna selection diversity or carrier combining diversity based on the reception status obtained from the reception information, and the determination result is output as a diversity switching signal, When it is determined that reception is performed with antenna selection diversity, the switching output obtained from the antenna switching means is output as a diver output, and when it is determined that reception is performed with carrier combining diversity, it is obtained from the carrier combining means. List that outputs the synthesized output as diver output Is a Iba mode switching means,
The carrier synthesizing unit outputs which demodulated signal among a plurality of demodulated signals is used as carrier synthesized antenna information, and uses all ante systems when the list generation signal indicates the generation of a channel list. If the list generation signal does not instruct the generation of the channel list, until sufficient reception sensitivity is obtained based on the reception information according to the priority order of the plurality of antennas indicated by the antenna characteristic information A list-compatible carrier combining means for sequentially selecting and adding signals used for carrier combining from the plurality of demodulated signals to perform carrier combining;
Further, when the acquisition of the channel list is instructed by the channel list acquisition instruction signal, a list generation signal indicating that the list generation operation is in progress is output, and a physical channel for checking whether there is a receivable broadcast is selected for the channel list. A physical channel that is output as station instruction information, sequentially instructed to cancel noise components with an adjustment control signal for each of the plurality of noise removing means with adjustment control, and determined that there is a broadcast service that can be received based on the reception information. A diversity receiving television comprising channel list generation means for registering in a channel list. A plurality of antennas for receiving broadcast waves and outputting RF signals;
When connected to each of the plurality of antennas and the on control signal instructs execution of operation, the demodulated signal is subjected to frequency selection, frequency conversion, AD conversion, and OFDM demodulation for the physical channel instructed by channel selection control. A plurality of reception processing steps for stopping the operation when the ON control signal instructs to stop the operation,
When the diversity system switching signal indicates reception with antenna selection diversity, one of the plurality of demodulated signals having the best reception status is selected based on the received information, and the diversity system switching signal is carrier combining diversity. Antenna switching step to stop the operation when instructing reception at
In accordance with the priority order of the plurality of antennas indicated by the antenna characteristic information, signals used for carrier combination are sequentially selected and added from the plurality of demodulated signals until sufficient reception status is obtained based on reception information, and carrier combination is performed. A carrier combining step for outputting as a carrier combining antenna information which demodulated signal was used among the plurality of demodulated signals;
When receiving with antenna selection diversity or receiving with carrier combining diversity based on the reception status obtained from the received information, output the determination result as a diversity switching signal, and receive with antenna selection diversity When it is determined, the switching output obtained from the antenna switching step is output as a diver output, and when it is determined that reception is performed with carrier combining diversity, the combined output obtained from the carrier combining step is output as a diver output. Diver method switching step to
An error correction step of error-correcting a diver output output from the diver system switching step, outputting a transport stream as a TS signal, and outputting a reception status as reception information;
A video / audio decoding step of decoding video, audio, and data included in the TS signal, and outputting a video signal and an audio signal;
A video display step for displaying the video signal;
An audio reproduction step of reproducing the audio signal;
A user input step of outputting the contents as channel selection instruction information when the user inputs a channel desired to be viewed;
A channel selection step of outputting physical channel information to be received as channel selection control information based on the channel selection instruction information;
When the diversity selection information instructs reception at antenna selection diversity, outputs an instruction to turn on the operation for one of the plurality of reception processing steps based on the antenna selection information, When the diversity selection information indicates reception with carrier combining diversity, an instruction to turn on the operation is output to a necessary one of the plurality of reception processing steps based on the carrier combining antenna information. An RF control step;
An antenna characteristic storing step of holding the superiority or inferiority of the gain of each of the plurality of antennas for each physical channel and outputting the superiority or inferiority of the antenna characteristic in the physical channel indicated by the channel selection control signal as antenna characteristic information. Diversity TV reception method. The diversity television receiving method according to claim 4,
A plurality of noise sensors that collect noise present inside the device;
Connected to one of a plurality of antennas, one of the plurality of noise sensors, and one of a plurality of reception processing steps, and connected when the connected reception processing step is in an operation execution state The noise component output from the one noise sensor connected to the RF signal output from the one antenna is canceled and output, and the amount of noise component cancellation is obtained from the received information. 5. The diversity television receiving method according to claim 4, further comprising: a plurality of noise removing steps that adjust the received reception state to a value that is the best, and output the result to a plurality of reception processing steps. The diversity television receiving method according to claim 5,
The noise removal step is connected to one of the plurality of antennas, one of the plurality of noise sensors, and one of a plurality of reception processing steps, respectively, and when the adjustment control signal instructs the operation start The phase and amplitude of the noise component output from the one noise sensor connected to the RF signal output from the one antenna connected so that the reception status is the best based on the received information. Adjust and add to cancel and output the result, output that the phase and amplitude adjustment is completed as an end signal, and cancel the noise component for each physical channel indicated by the channel selection control signal It is a noise removal step with adjustment control that holds adjustment values of phase and amplitude,
In the user input step, when a user inputs a channel that the user desires to view, the content is output as channel selection instruction information. When the user inputs acquisition of a channel list that is a list of channels that can be viewed, the channel list is acquired. It is a list-compatible user input step that is output as an instruction signal,
The channel selection step is a list-corresponding channel selection step that outputs a channel selection control signal indicating a physical channel to be received based on channel selection instruction information and channel list channel selection instruction information,
In the diver system switching step, when the list generation signal instructs generation of a channel list, it is determined that reception is performed by carrier combining diversity, and the result is output as a diver system switching signal. If the generation is not instructed, it is determined whether to receive with antenna selection diversity or carrier combining diversity based on the reception status obtained from the reception information, and the determination result is output as a diversity switching signal, When it is determined that reception is performed with antenna selection diversity, the switching output obtained from the antenna switching step is output as a diver output, and when it is determined that reception is performed with carrier combining diversity, it is obtained from the carrier combining step. Output as a diver output List is the corresponding diver method switching step,
In the carrier synthesis step, which demodulated signal is used among a plurality of demodulated signals is output as carrier synthesized antenna information, and when the list generation signal instructs generation of a channel list, all antenna systems are used. When the carrier generation is performed and the list generation signal does not instruct generation of the channel list, the sufficient reception sensitivity is obtained based on the reception information according to the priority order of the plurality of antennas indicated by the antenna characteristic information. A list-compatible carrier synthesis step for sequentially selecting and adding signals used for carrier synthesis from among a plurality of demodulated signals and performing carrier synthesis,
Further, when the acquisition of the channel list is instructed by the channel list acquisition instruction signal, a list generation signal indicating that the list generation operation is in progress is output, and a physical channel for checking whether there is a receivable broadcast is selected for the channel list. A physical channel that is output as station instruction information, sequentially instructed to cancel noise components with an adjustment control signal for each of the plurality of noise removal steps with adjustment control, and determined that there is a broadcast service that can be received based on reception information. A diversity television reception method comprising a channel list generation step of registering in a channel list.

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