JP2006121501A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiver, allowing better receivable broadcast channels to be selected at the present position cheaply without needing a large-scale system. <P>SOLUTION: A digital broadcast receiver 100 comprises a broadcast receiving unit 10 composed of a tuner 11, an OFDM demodulator 12 and a TS processor 13, history manager 102 for saving reception history information of received broadcast channels 201, 202, and a channel selecting controller 101 for selecting satisfactorily receivable broadcast channels from the saved broadcast reception history information 201, 202. At starting reception, it selects a satisfactorily receivable broadcast channel, based on the broadcast reception history information 201, 202. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a broadcast receiver capable of receiving terrestrial digital broadcasts and the like, and more particularly, to improvement of a channel selection operation of a broadcast receiver such as a terrestrial digital broadcast receiver for portable terminals.

  Currently, a transition to a new terrestrial digital broadcast replacing the terrestrial analog broadcast is in progress. This digital terrestrial broadcasting started in 2003 in the three major metropolitan areas of Kanto, Kinki and Tokai, and is planned to be expanded nationwide in 2006. Along with this, the current analog broadcasting will be abolished in 2011.

  In this terrestrial digital broadcasting technical standard ISDB-T (Integrated Services Digital Broadcasting-Terrestrial), OFDM (Orthogonal Frequency Division Multiplexing) that uses a large number of carriers as a modulation method is adopted, and reflection by buildings It is possible to suppress ghost interference by multiple propagation paths (multipath). Furthermore, in ISDB-T, one broadcast wave channel (bandwidth of about 5.6 MHz) can be divided into 13 segments (1 segment = about 430 kHz). As a result, broadcasting services such as high-definition broadcasting for fixed receivers composed of 12 segments in one channel and broadcasting for mobile terminals with only one segment become possible. Further, since ISDB-T employs time-axis direction interleaving and a powerful error correction function, stable reception is possible even with a portable terminal such as a PDA (Personal Digital Assistants) or a cellular phone.

FIG. 9 is a block diagram showing a configuration of a conventional digital broadcast receiving apparatus.
In FIG. 9, the terrestrial digital broadcast receiving apparatus includes a broadcast receiving unit 10 including a tuner 11, an OFDM demodulating unit 12, and a TS processing unit 13, an antenna 14 for receiving broadcast radio waves, a video display unit 15, and an audio output. Speaker 16 and a channel selection unit 17 that performs a channel selection operation. Broadcast radio waves received by the antenna 14 are tuned to a desired broadcast channel by the tuner 11.

FIG. 10 is a diagram illustrating an example of the configuration of the tuner 11.
In FIG. 10, the tuner 11 includes an amplification unit 21, a mixer unit 22, a filter unit 23, and a PLL (Phase-Locked Loop) unit 24.

  The broadcast radio wave received by the antenna 14 is amplified to a predetermined level by the amplification unit 21, and then converted into an IF (Intermediate Frequency) signal corresponding to the frequency of the local oscillation signal set by the PLL unit 24 by the mixer unit 22. After being converted, the unnecessary signal component is removed by the filter unit 23, and after being amplified again, it is output. The channel selection operation can be performed by setting the frequency of the local oscillation signal of the PLL unit 24 to the frequency of the desired broadcast channel. The channel selection unit 17 performs this channel selection operation by the user's operation. When starting broadcast viewing, the channel selection unit 17 holds the last selected channel and selects the channel again (this is the last channel). This is called channel selection operation).

  The IF signal output from the tuner 11 is digitally demodulated by the OFDM demodulator 12.

FIG. 11 is a diagram illustrating an example of the configuration of the OFDM demodulator 12.
11, the OFDM demodulator 12 includes an A / D converter 31, an orthogonal demodulator 32, a phase corrector 33, an FFT (Fast Fourier Transform) 34, a frame synchronizer 35, a detector 36, and a frequency / time deinterleaver. Unit 37, bit deinterleave unit 38, Viterbi decoding unit 39, byte deinterleave unit 40, energy spreading unit 41, and RS decoding unit 42.

  The input IF signal is A / D converted by the A / D converter 31, and then orthogonally detected by the orthogonal demodulator 32 and converted into baseband symbols. Thereafter, the phase shift due to the transmission environment is corrected by the phase correction unit 33, and the symbol data of each subcarrier is demodulated by the Fourier transform processing in which the FFT (Fast Fourier Transform) unit 34 converts the time axis data into the frequency axis data. The Thereafter, the reception synchronization symbol is detected by the frame synchronization unit 35, and transmission frame synchronization processing composed of a plurality of symbols is executed. Thereafter, the detection unit 36 performs delay detection of the pilot signal and the like, and the frequency / time deinterleaving unit 37, the bit deinterleaving unit 38, the Viterbi decoding unit 39, the byte deinterleaving unit 40, the energy spreading unit 41, and the RS decoding unit 42 Various deinterleaving processes and correction processes for errors occurring during transmission are executed and output as TS (Transport Stream) data. The TS data output from the OFDM demodulator 12 is subjected to demax processing and decoding processing by the TS processing unit 13 in FIG. 9, and video data and audio data are output. The video data is displayed by the video display unit 15, and the audio data is output from the speaker 16.

  In terrestrial digital broadcasting, a service area is defined for each broadcast channel, and the broadcast channel (frequency of the broadcast channel) that can be received varies depending on the region. Therefore, if a mobile terminal type broadcast receiving apparatus or the like tries to receive after moving for a long distance, it is necessary to search for and select a broadcast channel broadcast at that location. In addition, a technique is disclosed that includes a correspondence table between regional information and broadcast channel frequencies in the service area, and automatically searches for and selects broadcast channel frequencies from current position information (see, for example, Patent Document 1). ).

  Digital terrestrial broadcasting is characterized by the fact that it can be stably received by mobile devices, but the reception environment varies, and the environment is surrounded and the radio wave power (electric field strength) is weak. Predetermined reception of radio waves becomes difficult in places where the power fluctuation (time variation) is large, and there are cases where viewing is not possible even within a broadcast service area. In conventional analog broadcasting, video with noise can be viewed even if the reception condition is poor. However, in digital broadcasting, if the reception condition does not satisfy a predetermined condition, OFDM demodulation processing and video / audio decoding processing cannot be performed. , I can not watch the video at all. This reception state differs for each broadcast channel, and there are broadcast channels that can be received and viewed satisfactorily and broadcast channels that cannot be received depending on the location. Furthermore, since the characteristics of the antenna and tuner of the broadcast receiving apparatus are various, the broadcast channels that can be received by the receiving apparatus may be different.

  The problem here is that it is not known which broadcast channel the broadcast receiving apparatus can receive well at the place where reception is desired. Even a broadcast channel selected by the last channel selection operation at the start of reception is unclear whether it can be received well at the current location, and there is a possibility that the video cannot be viewed at all. Even in the terminal device described in Patent Document 1, it is possible to select and select a broadcast channel whose current position is a service area, but it is unknown whether the broadcast channel can be received satisfactorily.

  If reception is not possible, the broadcast channel will be changed and the reception will be confirmed. However, since digital terrestrial broadcasting requires a certain amount of time for OFDM demodulation processing and video decoding processing, the video will be about 1 second after channel selection. It takes time to display. Therefore, it takes about 1 second each time a channel that can be received is searched, that is, each time the broadcast channel is changed. Broadcasting for mobile devices is often viewed for a short period of time while moving, and it can be said that selecting a broadcast channel that can be satisfactorily received immediately after the start of reception is a major issue to be solved.

  Regarding this problem, a digital terrestrial broadcast channel selection system that distributes an EPG (Electronic Program Guide) indicating a digital terrestrial broadcast program that can be received at the current position of the mobile / mobile receiving terminal is disclosed (for example, a patent) Reference 2).

  According to the digital terrestrial broadcasting channel selection system described in Patent Document 2, the communication station searches the database for broadcast programs that can be received for each piece of environmental information including position information, and broadcasts the search result as an EPG (electronic program guide). Send to the terminal via communication such as a telephone line. The broadcast receiving terminal can select a terrestrial digital broadcast channel that can be received at the current position from the received EPG.

JP-A-8-162909 JP 2004-104482 A

  However, the apparatus described in Patent Document 2 requires the construction of a large-scale service system including a communication station and a database, and the construction of the system requires a large amount of cost. Further, as described above, since the broadcast channel that can be received differs depending on the characteristics of the antenna and tuner of the broadcast receiving device, the broadcast receiving device that is used also in the broadcast channel that can be received by the received EPG. However, there may be a case where reception is not possible.

  The present invention has been made in view of such a problem, and does not require a large-scale system, and can provide a broadcast receiving apparatus that can select a broadcast channel that can be better received at the current position at low cost. It is intended to provide.

  The broadcast receiving device of the present invention is a broadcast receiving device that receives and demodulates a broadcast wave, a broadcast receiving unit that receives the broadcast wave, a history management unit that stores reception history information of a broadcast channel of the received broadcast wave, and a storage And a channel selection control unit that performs control to select and select a broadcast channel that can be satisfactorily received on the basis of the received reception history information. According to this configuration, since the channel selection operation is performed based on the broadcast reception history information of the broadcast channels that have been received in the past, it is possible to select a broadcast channel that can be reliably received.

  Furthermore, the information processing apparatus further comprises position information acquisition means for acquiring position information, wherein the history management means stores reception history information of received positions and broadcast channels, and the channel selection control means is based on the stored reception history information. Thus, by performing control for selecting and selecting a broadcast channel that can be satisfactorily received at the current position, it is possible to easily select a broadcast channel that can be satisfactorily received at the current position.

  Further, the apparatus includes a reception state measuring unit that measures a reception state of the received broadcast wave, the history management unit stores reception history information of a received position, a broadcast channel, and a reception state, and the tuning control unit stores Based on the received reception history information, it is possible to select a broadcast channel that has been received best in the past by selecting and selecting a broadcast channel that is in a good reception state at the current position. Become.

  As a specific aspect, the position information acquisition means may receive radio waves from a mobile phone base station and acquire position information, and the position information acquisition means acquires position information by GPS. It may be.

  As a specific aspect, the reception state measuring unit measures the reception state from any one of BER, reception power, CN ratio, or a combination thereof.

  As described above in detail, according to the present invention, since a channel selection operation is performed from broadcast reception history information of broadcast channels that have been received in the past, it is possible to easily select a broadcast channel that can be reliably received.

  Further, by including the position information in the reception history information, it is possible to easily select a broadcast channel that can be received at the current position. Furthermore, by including the reception state in the reception history information, it is possible to select a broadcast channel that can be received best.

  Hereinafter, preferred embodiments of a broadcast receiving apparatus of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment FIG. 1 is a block diagram showing a configuration of a receiving unit of a broadcast receiving apparatus according to a first embodiment of the present invention. The broadcast receiving apparatus according to the present embodiment is an example applied to a digital broadcast receiving apparatus that receives terrestrial waves and CS / BS digital satellite broadcasts and outputs them to a display unit. The same components as those in FIG. 9 are denoted by the same reference numerals.

  In FIG. 1, a digital broadcast receiving apparatus 100 according to the present embodiment includes a broadcast receiving unit 10 (broadcast receiving means) including a tuner 11, an OFDM demodulating unit 12, and a TS processing unit 13, and an antenna 14 that receives broadcast radio waves. And a video display unit 15 typified by a liquid crystal display, a speaker 16 that outputs audio, and a channel selection control unit 101 (channel selection control) that selects and selects a broadcast channel that can be satisfactorily received from the stored reception history information. Means) and a history management unit 102 (history management means) for storing reception history information of received broadcast channels.

  Broadcast radio waves received by the antenna 14 are tuned to a desired broadcast channel by the tuner 11. This channel selection operation is performed by channel selection control of the channel selection control unit 101. The IF signal output from the tuner 11 is subjected to digital demodulation processing by the OFDM demodulator 12 and output as TS data. The TS data output from the OFDM demodulator 12 is subjected to demax processing and decoding processing in the TS processing unit 13 to output video data and audio data. The video data is displayed on the video display unit 15, and the audio data is output from the speaker 16. Here, the broadcast receiving unit 10 sends information regarding whether or not the selected broadcast channel has been received to the history management unit 102 as reception availability information.

  The history management unit 102 stores the channel selection information obtained from the channel selection control unit 101 and the reception availability information obtained from the broadcast receiving unit 10 as broadcast reception history information.

FIG. 2 is a diagram illustrating an example of the broadcast reception history information.
In FIG. 2, 201 is broadcast reception history information, and the broadcast reception history information 201 is composed of the frequency of the received channel and reception availability information. This broadcast reception history information 201 is added every time the user changes the channel. Reference numeral 202 denotes broadcast reception history information including a channel frequency and a reception success rate created based on the broadcast reception history information 201.

  Hereinafter, the channel selection operation of the digital broadcast receiving apparatus 100 configured as described above will be described.

  FIG. 3 is a flowchart for explaining the channel selection operation of the digital broadcast receiving apparatus 100. In the figure, S indicates a flow step.

  First, at the start of broadcast reception in step S1, the channel selection control unit 101 selects a broadcast channel that can be received best based on the reception history information. That is, the reception success rate for each broadcast channel is calculated from the broadcast reception history information, and the channel frequency with the highest reception success rate is selected. The broadcast reception history information 201 shown in FIG. 2 is taken as an example. The broadcast channel 458 MHz has a reception success rate of 3/5 = 3 because the reception OK is 3 and the reception NG is 2 out of the channel selection frequency of 5. Calculated as 60%. In calculating the reception success rate, it is also possible to calculate only the broadcast channel whose reception area is the service area and select the channel frequency with the highest reception success rate. Further, the reception success rate is calculated every time broadcast reception history information is added, and the channel frequency with the highest reception success rate is determined from the reception success rate table for each broadcast channel, as shown in the broadcast reception history information 202 of FIG. It is also possible to determine in advance.

  Next, the channel selection operation of the broadcast channel selected in step S2 is performed, and broadcast viewing is started. In step S3, it is checked whether there is a channel change, and a request for channel change from the user is awaited. If there is no request for channel change, broadcast reception continues.

  If there is a request for channel change, the channel selection is changed to the broadcast channel designated in step S4, the broadcast reception history information of the broadcast channel is added to the reception history management unit 102 in step S5, and the process returns to step S3. Reception continues until the user changes the channel.

  As described above, the digital broadcast receiving apparatus 100 according to the present embodiment includes the broadcast receiving unit 10 including the tuner 11, the OFDM demodulating unit 12, and the TS processing unit 13, and the reception history information 201 and 202 of the received broadcast channel. And a channel selection control unit 101 that selects and selects a broadcast channel that can be satisfactorily received from the stored broadcast reception history information 201 and 202, and receives the broadcast reception history information 201 and 202 at the start of reception. Since a channel that can be received well is selected and selected based on the channel, a channel that can be reliably received is selected in order to select a channel from the broadcast reception history information of the broadcast channel that has been received in the past. be able to.

Second Embodiment FIG. 4 is a block diagram showing a configuration of a receiving unit of a broadcast receiving apparatus according to a second embodiment of the present invention. The same components as those in FIG.

  4, the digital broadcast receiving apparatus 110 according to the present embodiment is configured by further adding a position information acquisition unit 103 (position information acquisition means) that acquires information on the current position to the digital broadcast reception apparatus 100 of FIG. Is done.

  The position information acquisition unit 103 receives radio waves from a GPS (Global Positioning System) satellite (not shown), and detects position information such as the latitude and longitude of the current position. The detected position information is output to the channel selection control unit 101 or the history management unit 102. In addition to acquiring the position information from the GPS, for example, a position information acquisition unit 103 having a mobile phone communication function and acquiring the position information from an area identification signal sent from the communication telephone base station is also possible.

  FIG. 5 is a diagram showing an example of the broadcast reception history information 203 stored by the history management unit 102.

  In FIG. 5, the broadcast reception history information 203 is different from the broadcast reception history information 201 of FIG. 2 in that reception position information is added in addition to the channel frequency and reception availability information. This reception position information is information acquired from the position information acquisition unit 103 every time the user changes the broadcast channel. In FIG. 5, information on latitude and longitude is stored. Based on this broadcast reception history information, it is possible to manage information such as which channel has been received at which location.

  Hereinafter, the channel selection operation of the digital broadcast receiving apparatus 110 configured as described above will be described.

FIG. 6 is a flowchart for explaining the channel selection operation of the digital broadcast receiving apparatus 110.
First, the channel selection control unit 101 acquires the current position information from the position information acquisition unit 103 at the start of broadcast reception in step S11. Next, in step S12, the broadcast reception history information 203 is referred to, and the broadcast channel that can be received best at the current position is selected. Specifically, the distance from the current position information acquired in step S11 is calculated from each broadcast reception history information, and broadcast reception history information whose calculated distance is only within a predetermined range is extracted. That is, broadcast reception history information received at a location close to the current position is extracted.

  From the extracted broadcast reception history information, the reception success rate for each broadcast channel described in the first embodiment (see broadcast reception history information 202 in FIG. 2) is calculated, and the channel frequency with the best reception success rate is selected. .

  Next, the broadcast channel selected in step S12 is selected, and broadcast viewing is started in step S13. In step S14, it is checked whether there is a channel change, and a request for channel change from the user is awaited. If there is no request for channel change, broadcast reception is continued.

  If there is a request for channel change, the channel selection is changed to the broadcast channel designated in step S15, and the location information at the time of channel selection change is acquired from the location information acquisition unit 103 in step S16. Next, in step S17, the position information and the broadcast reception history information of the broadcast channel whose channel selection has been changed are added to the reception history management unit 102, and the process returns to step S14 to continue reception until the user changes the channel.

  As described above, the digital broadcast receiving apparatus 110 according to the present embodiment further includes the position information acquisition unit 103 that acquires position information, and the history management unit 102 broadcast reception history information 203 of the received position and broadcast channel. Since the channel selection control unit 101 selects and selects a broadcast channel that can be satisfactorily received at the current position from the stored broadcast reception history information 203, the broadcast that can be satisfactorily received at the current position at the start of reception. A channel can be selected and selected.

Third Embodiment FIG. 7 is a block diagram showing a configuration of a receiving unit of a broadcast receiving apparatus according to a third embodiment of the present invention. The same components as those in FIG.

  In FIG. 7, the digital broadcast receiving apparatus 120 of the present embodiment further includes a reception state measuring unit 104 (reception state measuring means) that measures the reception state of the selected broadcast channel in addition to the digital broadcast receiving apparatus 110 of FIG. Is added and configured.

  The reception state measurement unit 104 calculates the error rate of the reception data from the number of reception error data counted by the RS decoding unit 42 which is an error correction processing unit of the digital demodulation processing of the OFDM demodulation unit 12 shown in FIG. Measure the reception status. Specifically, a BER (Bit Error Rate) that is a ratio between the number of data bits subjected to error correction processing by the RS decoding unit 42 and the total number of received data bits is calculated. The BER is an index often used as a parameter for measuring the reception state. Generally, if the BER is 2 × 10E-4 or less, the error-free reception is possible. In addition to the BER, as a parameter for measuring the reception state, for example, a pilot signal which is a control signal periodically added to the reception data in the detection unit 36 in FIG. 11 showing the digital demodulation processing of the OFDM demodulation unit 12 It is also possible to perform delay detection such as this and calculate and use the CN (Carrier to Noise) ratio of the received channel from the dispersion value. Further, it is also possible to calculate and use the received power level of the broadcast radio wave received from the gain setting of the amplifier 21 in FIG. 10 showing the configuration of the tuner 11.

  FIG. 8 is a diagram illustrating an example of broadcast reception history information stored by the history management unit 102 of the digital broadcast receiving apparatus 120.

  8, the broadcast reception history information 204 is different from the broadcast reception history information 203 in FIG. 5 in that a reception state is added in addition to the channel frequency, reception availability information, and reception position information. The reception state is a BER value acquired from the reception state measurement unit 104 every time the user changes the broadcast channel.

  Hereinafter, the channel selection operation of the digital broadcast receiving apparatus 120 configured as described above will be described.

  Since the operation flow is the same as that of the second embodiment, FIG. 6 will be used to explain the processing operations of step 12 and step 17 which are operations different from those of the second embodiment.

  In step 12 of FIG. 6, the broadcast reception history information is referred to, and the broadcast channel that can be received best at the current position is selected. Specifically, the distance from the current position information acquired in step S11 is calculated for each piece of history information, and history information whose calculated distance is only within a predetermined range is extracted. That is, the history information received at a location close to the current position is extracted. After that, unlike the second embodiment, the reception state of each channel of the extracted history information, that is, the average value of BER is calculated, and the broadcast channel having the best calculated average value of BER is selected. In addition to the determination based on the average value of BER, changes such as selection of a broadcast channel having the best BER are also possible. In step S <b> 17, the reception status (BER) is added to the reception history management unit 102 in addition to the same position information as in the second embodiment and whether or not the reception channel is changed.

  As described above, the digital broadcast receiving apparatus 120 of the present embodiment further includes the reception state measurement unit 104 that measures the reception state of the received broadcast wave, and the history management unit 102 includes the received position, the broadcast channel, The broadcast reception history information in the reception state is saved, and the channel selection control unit 101 selects and selects a broadcast channel with a good reception state (for example, a good BER value) at the current position from the stored broadcast reception history information. Therefore, it is possible to select a broadcast channel that can be received best.

  Note that the digital broadcast receiver according to each of the above embodiments is not only a television receiver, but also a receiver capable of receiving terrestrial digital broadcasts for portable terminals and electronic devices other than the television receiver, such as broadcast waves. The present invention is applicable to a personal computer capable of receiving and displaying and a digital broadcast receiving device of a mobile phone.

  The broadcast reception history information in FIGS. 2, 5, and 8 is a representative example, and any storage form may be used.

  Moreover, although the name “broadcast receiving apparatus” is used in each of the above embodiments, this is for convenience of explanation, and it goes without saying that it may be a television receiver, a portable terminal, or the like.

  Further, the type, number, connection method, and the like of each circuit unit constituting the broadcast receiving apparatus, such as a history management unit, are not limited to the above-described embodiments.

It is a block diagram which shows the structure of the receiving part of the broadcast receiver of the 1st Embodiment of this invention. It is a figure which shows an example of the broadcast reception log | history information of the broadcast receiving apparatus of this Embodiment. It is a flowchart explaining the channel selection operation | movement of the broadcast receiving apparatus of this Embodiment. It is a block diagram which shows the structure of the receiving part of the broadcast receiving apparatus of the 2nd Embodiment of this invention. It is a figure which shows an example of the broadcast reception log | history information of the broadcast receiving apparatus of this Embodiment. It is a flowchart explaining the channel selection operation | movement of the broadcast receiving apparatus of this Embodiment. It is a block diagram which shows the structure of the receiving part of the broadcast receiver of the 3rd Embodiment of this invention. It is a figure which shows an example of the broadcast reception log | history information of the broadcast receiving apparatus of this Embodiment. It is a block diagram which shows the structure of the receiving part of the conventional digital broadcast receiver. It is a figure which shows an example of a structure of the tuner of the conventional digital broadcast receiver. It is a figure which shows an example of a structure of the OFDM demodulation part of the conventional digital broadcast receiver.

Explanation of symbols

10 Broadcast receiving section (broadcast receiving means)
DESCRIPTION OF SYMBOLS 11 Tuner 12 OFDM demodulation part 13 TS process part 14 Antenna part 15 Image | video display part 16 Speaker 17 Channel selection control part 18 History management part 21 Amplification part 22 Mixer part 23 Filter part 24 PLL part 31 A / D conversion part 32 Orthogonal demodulation part 33 Phase correction unit 34 FFT unit 35 Frame synchronization unit 36 Detection unit 37 Frequency / time deinterleaving unit 38 Bit deinterleaving unit 39 Viterbi decoding unit 40 Byte deinterleaving unit 41 Energy spreading unit 42 RS decoding unit 100, 110, 120 Digital broadcasting Receiving device 101 Tuning control unit (tuning control means)
102 History management unit (history management means)
103 position information acquisition unit (position information acquisition means)
104 Reception state measuring unit (reception state measuring means)

Claims (6)

In a broadcast receiver that receives and demodulates broadcast waves,
Broadcast receiving means for receiving broadcast waves;
History management means for storing reception history information of broadcast channels of received broadcast waves;
A broadcast receiving apparatus comprising: a channel selection control unit that performs control to select and select a broadcast channel that can be satisfactorily received based on the stored reception history information. Furthermore, a location information acquisition means for acquiring location information is provided,
The history management means stores the reception history information of the received position and broadcast channel,
2. The broadcast receiving apparatus according to claim 1, wherein the channel selection control means performs control for selecting and selecting a broadcast channel that can be satisfactorily received at the current position based on the stored reception history information. Furthermore, it comprises a reception state measuring means for measuring the reception state of the received broadcast wave,
The history management means stores reception history information of the received position, broadcast channel, and reception state,
The said channel selection control means performs control which selects and selects a broadcast channel with a good reception state at the current position based on the stored reception history information. Broadcast receiving device.   4. The broadcast receiving apparatus according to claim 2, wherein the location information acquisition unit receives radio waves from a mobile phone base station and acquires location information. 5.   The broadcast receiving apparatus according to claim 2, wherein the position information acquisition unit acquires position information by GPS.   The broadcast receiving apparatus according to claim 3, wherein the reception state measuring unit measures the reception state from any one of BER, reception power, CN ratio, or a combination thereof.

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