JP2008011018A - Television broadcasting receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television broadcast receiver capable of properly selecting/outputting a TV broadcast with an excellently reproducible form and suppressing the consumed electric energy. <P>SOLUTION: The television broadcast receiver includes: a plurality of processing system sections for receiving/demodulating TV broadcasts of respectively corresponding forms; a location information acquisition means for acquiring current location information; and an output determining means for determining a television broadcast of a receptible form on the basis of the location information acquired by the location information acquisition means, the television broadcast receiver supplies power to at least the processing system section for receiving/demodulating the television broadcast of the form determined by the output determining means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is capable of receiving and demodulating a plurality of different types of television broadcasts (hereinafter, “TV” is referred to as “TV”), and outputting a demodulated signal in any of the formats to a playback device. The present invention relates to a TV broadcast receiver.

  In recent years, it has become common to process / manage audio and video in a digital format in a recording medium, equipment, or the like. The trend of digital encoding of audio and video in such recording media and devices has spread to the broadcasting related industry. In the broadcasting-related industry, the transition from terrestrial analog TV broadcasting to terrestrial digital TV broadcasting is currently in progress.

  This terrestrial digital TV broadcast is spreading. However, in order to shift TV broadcasting from terrestrial analog TV broadcasting to terrestrial digital TV broadcasting, large-scale capital investment, enormous time, labor, cost, etc. are required. Currently, the transition is gradually in progress, and there are situations where nationwide terrestrial digital TV broadcasting is available / not available. In addition, in order to view digital terrestrial TV broadcasting, a device corresponding to it is necessary. Viewers must purchase new equipment in order to view terrestrial digital TV broadcasts. Therefore, if the TV broadcast is integrated into the terrestrial digital TV broadcast at this stage, many viewers cannot view the TV broadcast. In view of these circumstances, simultaneous broadcasting of terrestrial digital TV broadcasting and terrestrial analog TV broadcasting (that is, a method of broadcasting a program having the same content at the same time in both digital and analog formats) is being implemented. .

For example, in a TV broadcast receiver mounted on a moving body represented by a vehicle, terrestrial digital TV broadcasts and terrestrial analog TV broadcasts are considered in consideration of scattered areas where terrestrial digital TV broadcasts are viewable / unavailable It is designed to receive both broadcasts. For example, Patent Literature 1 below discloses a TV broadcast receiver that supports simultaneous broadcasting. The TV broadcast receiver described in Patent Document 1 below monitors whether or not an error rate of a reception signal (hereinafter referred to as “digital reception signal”) of a terrestrial digital TV broadcast exceeds a reference value. When the error rate is equal to or lower than the reference value, it is determined that the reception state of the terrestrial digital TV broadcast is good, and the digital reception signal is output to the video / audio output device. On the other hand, when the error rate exceeds the reference value, it is assumed that the reception state of the terrestrial digital TV broadcast has deteriorated. ). That is, according to Patent Document 1 below, a TV broadcast receiver that outputs a digital reception signal preferentially and outputs an analog reception signal only when the reception state of the terrestrial digital TV broadcast deteriorates is provided.
Japanese Patent No. 3583963

  According to the TV broadcast receiver described in Patent Document 1, for example, terrestrial digital TV broadcasts are received and processed while terrestrial analog TV broadcasts are received and processed and output to the video / audio output device. This is because the TV broadcast receiver always detects the reception state of the terrestrial digital TV broadcast and operates to switch the output to the terrestrial digital TV broadcast when the reception state becomes good.

  However, when the processing is performed on both types of received signals in parallel as described in Patent Document 1, the power consumption of the TV broadcast receiver increases, which is not desirable. In addition, the video / audio required for the viewer is only one of the TV broadcasts that can be satisfactorily reproduced by the video / audio output device. From this point of view, the TV broadcast receiver only needs to operate so as to execute processing on only one of the received signals and output the processed signal to the video / audio output device. However, in the current TV broadcast receiver, if the reception state of terrestrial digital TV broadcast (or terrestrial analog TV broadcast) is not monitored, the format to be reproduced by the video / audio output device is appropriately selected according to the reception state.・ Cannot output.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a TV broadcast receiver that can appropriately select and output a TV broadcast in a format that can be reproduced satisfactorily and can suppress the power consumption.

  A TV broadcast receiver according to one aspect of the present invention that solves the above problems is capable of receiving and demodulating a plurality of different types of TV broadcasts, and outputting a demodulated signal in any of the formats to a playback device It relates to a receiver. The TV broadcast receiver includes a plurality of processing system units for receiving and demodulating TV broadcasts of corresponding formats, position information acquisition means for acquiring current position information, and position information acquired by the position information acquisition means. And a processing system for receiving and demodulating at least the television broadcast of the format determined by the output determination means among the plurality of processing system units. The power is supplied to the unit.

  According to the TV broadcast receiver configured in this way, the reception status of each type of TV broadcast is determined based on the acquired position information, and the format of the format to be output to the playback device based on the determination result. TV broadcast can be determined. At the same time, power can be supplied only to the processing system unit of the determined type. In other words, a TV broadcast receiver is provided that can appropriately select and output a TV broadcast in a format that can be satisfactorily reproduced and suppress the power consumption.

  In addition, a TV broadcast receiver according to another aspect of the present invention that solves the above problems is capable of receiving and demodulating a plurality of different types of TV broadcasts, and reproducing a demodulated signal of any one of the formats. It is related with the receiver which outputs to. The TV broadcast receiver includes a plurality of processing system units for receiving and demodulating TV broadcasts of corresponding formats, position information acquisition means for acquiring current position information, and position information acquired by the position information acquisition means. And an output determining means for determining a television broadcast of a format that can be received based on it, and receiving at least one of the plurality of processing system units in a format other than the format determined by the output determining means -The processing system unit to be demodulated is operated in the power saving mode.

  According to the TV broadcast receiver configured in this way, the reception status of each type of TV broadcast is determined based on the acquired position information, and the format of the format to be output to the playback device based on the determination result. TV broadcast can be determined. At the same time, it is possible to reduce the amount of power supplied to the processing system unit of a format other than the determined format. In other words, a TV broadcast receiver is provided that can appropriately select and output a TV broadcast in a format that can be satisfactorily reproduced and suppress the power consumption.

  The TV broadcast receiver cuts off power supply to a processing system unit that receives and demodulates a TV broadcast of a format other than the format determined by the output determination means, for example, among a plurality of processing system units. It may work.

  The TV broadcast receiver may further include, for example, a database that manages the reception status of each type of TV broadcast in association with position information. In this case, the output determination means can search the database using the position information acquired by the position information acquisition means as a key, and can determine a receivable television broadcast based on the search result.

  In addition, a TV broadcast receiver according to another aspect of the present invention that solves the above-described problems is capable of receiving and demodulating simultaneous digital TV broadcasts and analog TV broadcasts, and a demodulated signal in one of the formats. The present invention relates to a receiver that outputs to a playback device. The TV broadcast receiver includes a first processing system unit that receives and demodulates a digital TV broadcast, a second processing system unit that receives and demodulates an analog TV broadcast, and a position information acquisition unit that acquires current position information. And an output determining means for determining a television broadcast of a format that can be received based on the position information acquired by the position information acquiring means. When the output determining means determines the digital TV broadcast, Supply power to the processing system unit, cut off power supply to the second processing system unit, and supply power to the second processing system unit when the output determining means determines analog TV broadcasting. The power supply to the first processing system unit is cut off.

  Here, the TV broadcast receiver may further include, for example, a database that manages the reception status of each type of television broadcast in association with position information. In this case, the output determination means searches the database using the position information acquired by the position information acquisition means as a key, and when the search result indicates that the reception state of any type of television broadcast is good, You may operate | move so that the television broadcast which should be output to this reproduction | regeneration apparatus may be determined to be a digital television broadcast.

  For example, the TV broadcast receiver may be provided in a moving body.

  According to the present invention, there is provided a TV broadcast receiver suitable for appropriately selecting and outputting a TV broadcast of a format that can be satisfactorily reproduced and suppressing power consumption.

  Hereinafter, the configuration and operation of the TV broadcast receiver according to the embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a video / audio output device 100 including a TV broadcast receiver according to an embodiment of the present invention. The video / audio output device 100 is mounted on, for example, a vehicle that is a moving body. The video / audio output device 100 is compatible with simultaneous broadcasting, and is designed to receive and process both terrestrial digital TV broadcasts and terrestrial analog TV broadcasts. The video / audio output device 100 is connected to an ACC power source 200 of the vehicle. Each component of the video / audio output device 100 is operated by a DC voltage supplied from the ACC power source 200. In FIG. 1, for convenience, the connection between the ACC power source 200 and each component is omitted.

  The video / audio output apparatus 100 includes a control unit 10, a digital TV antenna 11, a digital TV tuner 12, an OFDM (Orthogonal Frequency Division Multiplexing) demodulator 13, an MPEG (Moving Picture Experts Group) decoder 14, a video Changeover switch 15, switch 16, 34, audio D / A converter 21, audio changeover switch 23, audio amplifier 24, analog TV antenna 31, analog TV tuner 32, analog reception signal demodulator 33, memory 40, GPS (Global Positioning System) receiver 41, display 50, speakers 60R and 60L, and light receiving unit 70.

  The remote controller (hereinafter referred to as “remote controller”) 80 is provided with operation keys for operating the video / audio output device 100. When the user operates the remote controller 80, a control pulse corresponding to the operation is output from the remote controller 80. This control pulse is, for example, a signal conforming to the IrDA standard. When the light receiving unit 70 receives this control pulse, it passes it to the control unit 10. When the remote controller 80 is being operated, for example, the display on the display 50 may be switched to the operation screen, or character information relating to the operation may be superimposed on the image being displayed on the display 50. .

  The control unit 10 performs overall control of the entire video / audio output apparatus 100. The control unit 10 operates to control each component based on, for example, various programs installed therein and control pulses from the light receiving unit 70. The switches 16 and 34 are also used to control power supply to each component. The control unit 10 controls the switches 16 and 34 to be on during normal operation, and does not cut off the power supply to each component.

  Here, a series of signal processing in the video / audio output apparatus 100 will be described.

  First, processing for a digital reception signal will be described. The digital TV antenna 11 has a function of receiving an RF (Radio Frequency) signal of each channel of terrestrial digital TV broadcasting. Each RF signal received by the digital TV antenna 11 is input to the digital TV tuner 12.

  The digital TV tuner 12 performs frequency conversion by selecting an RF signal of a channel designated by the control unit 10 (hereinafter referred to as “designated channel”) from among the input RF signals. Specifically, the signal is converted into an intermediate frequency (IF) signal that improves stable operation and selection characteristics. The IF signal after frequency conversion is input to the OFDM demodulator 13 after unnecessary frequency components are removed by a BPF (Band Pass Filter) (not shown).

  The channel selected by the digital TV tuner 12 is determined according to the channel selection by the user operation. Specifically, when the user operates the remote controller 80 to select a channel, a control pulse corresponding to the operation is output from the remote controller 80. When the light receiving unit 70 receives this control pulse and passes it to the control unit 10, the control unit 10 issues a command to the digital TV tuner 12 to select the RF signal of the designated channel. The digital TV tuner 12 executes tuning processing according to this command.

  The control unit 10 issues a command to the digital TV tuner 12 and writes the information of the designated channel in the memory 40. Therefore, the memory 40 always holds information on the channel selected last by the user (hereinafter referred to as “last channel”). When the channel selection operation by the user is not performed (for example, immediately after the power switch (not shown) is turned on), the control unit 10 refers to the memory 40 and selects the RF signal corresponding to the last channel. Command 12

  The OFDM demodulator 13 performs A / D conversion on the input IF signal to convert it into a digital signal. Next, the converted digital signal is divided into, for example, several thousand carriers, and after being subjected to synthesis (for example, a known maximum ratio synthesis) by matching the phase for each carrier, demodulation is performed. Thereby, an MPEG-2 transport stream signal (hereinafter referred to as “TS signal”) is obtained. This TS signal is output to the MPEG decoder 14.

  The MPEG decoder 14 decodes the input TS signal. As a result, the TS signal is decoded into a digital TV broadcast video signal and a digital format audio signal. The decoded video signal is output to the video switch 15. The audio signal is output to the audio D / A converter 21.

  The video changeover switch 15 performs a switching operation in accordance with an instruction from the control unit 10 and outputs an input signal from either the MPEG decoder 14 or the analog reception signal demodulation unit 33 to the display 50. For example, when a user operation is performed so as to reproduce a terrestrial digital TV broadcast program, the video switch 15 is controlled to output an input signal from the MPEG decoder 14. When the video signal output from the video switch 15 is input to the display 50, a terrestrial digital TV broadcast program is displayed on the screen of the display 50.

  The audio D / A converter 21 D / A converts the audio signal from the MPEG decoder 14 and outputs it to the audio switch 23.

  The voice changeover switch 23 performs a switching operation according to a command from the control unit 10, and outputs an input signal from either the voice D / A converter 21 or the analog reception signal demodulation unit 33 to the audio amplifier 24. Here, since a user operation is performed to reproduce a terrestrial digital TV broadcast program, the audio selector switch 23 is controlled to be connected to connect the audio D / A converter 21 and the audio amplifier 24.

  The audio amplifier 24 amplifies the audio signal from the audio switch 23 and outputs it to the speakers 60R and 60L. Thereby, the sound of the terrestrial digital TV broadcast program is reproduced by the speakers 60R and 60L.

  Here, the digital TV tuner 12, the OFDM demodulator 13, the MPEG decoder 14, and the audio D / A converter 21 are systems that process only the digital received signal. Hereinafter, these components are collectively referred to as a “digital processing system unit” for convenience of explanation.

  Next, signal processing of the analog reception signal will be described. The analog TV antenna 31 has a function of receiving an RF signal of each channel of terrestrial analog TV broadcasting. Each RF signal received by the analog TV antenna 31 is input to the analog TV tuner 32.

  The analog TV tuner 32 selects a specific RF signal from the input RF signals. The specific RF signal selected here is, for example, the RF signal of the designated channel or the last channel. The analog TV tuner 32 converts the selected RF signal into an IF signal. Next, the converted IF signal is output to the analog reception signal demodulation unit 33. Here, the designated channel by the control unit 10 can also be determined according to the channel selection by the user operation, as before. Information on the designated channel is held in the memory 40 as the last channel.

  The analog reception signal demodulation unit 33 separates the input IF signal into a video signal and an audio signal. Next, the separated video signal is AM (Amplitude Modulation) demodulated into a predetermined format video signal and output to the video switch 15. The separated audio signal is demodulated by FM (Frequency Modulation) and output to the audio changeover switch 23.

  For example, when a user operation is performed so as to reproduce a terrestrial analog TV broadcast program, the video switch 15 is controlled to output an input signal from the analog received signal demodulator 33. As a result, the video signal of the predetermined format is input to the display 50, and a terrestrial analog TV broadcast program is displayed on the screen of the display 50.

  In this case, the audio selector switch 23 is switching-controlled so as to connect the analog reception signal demodulator 33 and the audio amplifier 24. Therefore, the demodulated audio signal is input to the audio amplifier 24. When this audio signal is amplified by the audio amplifier 24 and output to the speakers 60R and 60L, the audio of the terrestrial analog TV broadcast program is reproduced by the speakers 60R and 60L.

  Here, the analog TV tuner 32 and the analog reception signal demodulator 33 are systems that process only the analog reception signal. Hereinafter, these components are collectively referred to as an “analog processing system section” for convenience of explanation.

  Next, TV broadcast program playback processing in the video / audio output apparatus 100 of this embodiment will be described. FIG. 2 shows a flowchart of TV broadcast program playback processing in the video / audio output apparatus 100.

  The process of the flowchart in FIG. 2 is started when, for example, the power switch of the video / audio output device 100 is turned on, and is ended when the power switch is turned off. This process is executed at every predetermined timing.

  When the power switch of the video / audio output device 100 is turned on, the control unit 10 issues a request to the GPS receiver 41 to acquire the current position information of the vehicle (Step 1, hereinafter, “ Abbreviated "S"). Note that immediately after the power switch is turned on, the control unit 10 does not supply a drive voltage to either the digital processing system unit or the analog processing system unit.

  The GPS receiver 41 is a unit having a known configuration, and has a function of acquiring own current position information using a GPS signal transmitted from a GPS satellite orbiting the earth. In response to the request from the control unit 10, the GPS receiver 41 executes processes such as acquisition / tracking of a GPS signal and positioning calculation. Then, the current position information obtained as a result is transferred to the control unit 10. The current position information delivered here is, for example, coordinate data represented in a predetermined two-dimensional coordinate system.

  When the current position information is acquired by the process of S1, the control unit 10 searches the reception information database DB stored in the memory 40 using the current position information as a search key. Then, the search result is acquired (S2).

  Here, FIG. 3 shows a conceptual diagram of the reception information database DB stored in the memory 40. This reception information database DB is a database that manages the reception status of TV broadcasts for each region. Each record of the reception information database DB includes fields of “region”, “terrestrial digital TV broadcast”, and “terrestrial analog TV broadcast”.

  In the “region” field, for example, coordinate data representing each region in Japan with coordinates is entered. This coordinate data corresponds to a positioning result by the GPS receiver 41 (that is, coordinate data represented by the predetermined two-dimensional coordinate system). In each of the “terrestrial digital TV broadcast” and “terrestrial analog TV broadcast” fields, the terrestrial digital TV broadcast and terrestrial analog TV are displayed in the region represented by the coordinate data in the “region” field of the same record. Data representing whether the broadcast can be received satisfactorily is entered. In FIG. 3, data indicating that data can be received satisfactorily is “◯”, and data indicating that data cannot be received satisfactorily is “x”.

  When the “terrestrial digital TV broadcast” field is “◯”, the video / audio output apparatus 100 can normally reproduce the terrestrial digital TV broadcast by the display 50 and the speakers 60R and 60L in the area. When the “terrestrial digital TV broadcast” field is “x”, the video / audio output device 100 cannot output normal video / audio signals to the display 50 and the speakers 60R and 60L in the area. Therefore, video / audio is not reproduced by the display 50 and the speakers 60R and 60L.

  When the “terrestrial analog TV broadcast” field is “◯”, the video / audio output apparatus 100 reproduces the terrestrial analog TV broadcast with relatively high image quality and high sound quality by the display 50 and the speakers 60R and 60L in the area. can do. When the “terrestrial analog TV broadcast” field is “×”, the video / audio output apparatus 100 performs terrestrial analog TV broadcast on the display 50 and speakers 60R and 60L in the area, and the disturbed video / audio with much noise. Can only be played in

  In the process of S2, the control unit 10 searches the “region” field of the reception information database DB using the current position information acquired in the process of S1 as a search key and extracts a corresponding record. ”And“ terrestrial analog TV broadcast ”field, the determination process of S3 is executed.

  For example, when the “terrestrial digital TV broadcast” field of the record extracted in the process of S2 is “◯” and the “terrestrial analog TV broadcast” field is “x”, the control unit 10 indicates that the vehicle is currently located. In the area, it is determined that only the reception state of the terrestrial digital TV broadcast is good (S3: digital), and the process proceeds to S4.

  For example, when the “terrestrial digital TV broadcast” field of the record extracted in the process of S2 is “×” and the “terrestrial analog TV broadcast” field is “◯”, the control unit 10 determines that the vehicle is at the current position. In the area where it is determined that only the reception state of the terrestrial analog TV broadcast is good (S3: analog), the process proceeds to S6.

  For example, when both fields of the record extracted in the process of S2 are “◯”, the control unit 10 determines that the reception status of both types of TV broadcasts is good in the area where the vehicle is currently located. . Here, in the present embodiment, it is assumed that the terrestrial digital TV broadcast is set to be preferentially reproduced. In this case, the control unit 10 proceeds to the process of S4. It is also possible to set so that the terrestrial analog TV broadcast is preferentially reproduced by a predetermined user operation. In this case, the control unit 10 proceeds to the process of S6.

  When both fields of the record extracted in the process of S2 are “x”, the control unit 10 returns to the process of S1 after a predetermined timing, for example. Then, the acquisition of the current position information is executed again.

  In the process of S4, the control unit 10 starts power supply to the digital processing system unit and cuts off power supply to the analog processing system unit. That is, the control unit 10 turns off the switch 34 (the switch 16 remains on) so that power is supplied only to the digital processing system unit among the digital processing system unit and the analog processing system unit.

  After the process of S4, the control unit 10 controls the digital processing system unit and executes the series of processes described above to generate a video / audio signal. Then, the generated video / audio signal is output to the display 50 and speakers 60R and 60L by controlling the video switch 15, the audio switch 23, and the audio amplifier 24 (S5). Thereby, a terrestrial digital TV broadcast program is reproduced.

  On the other hand, in the process of S6, the control unit 10 starts power supply to the analog processing system unit and cuts off power supply to the digital processing system unit. That is, the control unit 10 turns off the switch 16 (the switch 34 remains on) so that power is supplied only to the analog processing system unit among the digital processing system unit and the analog processing system unit.

  After the process of S6, the control unit 10 controls the analog processing system unit and executes the series of processes described above to generate a video / audio signal. Then, the generated video / audio signal is output to the display 50 and the speakers 60R and 60L by controlling the video switch 15, the audio switch 23, and the audio amplifier 24 (S7). Thereby, a terrestrial analog TV broadcast program is reproduced.

  After the process of S5 or S7, the control unit 10 shifts to a state of waiting for a predetermined time (S8). Then, after waiting for a predetermined time, the control unit 10 returns to the process of S1 and repeatedly executes the process of this flowchart. The processing of this flowchart is repeatedly executed until, for example, the power switch of the video / audio output device 100 is turned off.

  That is, according to the video / audio output device 100 of the present embodiment, it is determined which type of TV broadcast reception is good based on the current position information of the vehicle. Based on the determination result, a TV broadcast of a format to be reproduced is appropriately selected, and only for the processing system unit (either the digital processing system unit or the analog processing system unit) of the selected format. The operation is performed so that power is supplied. Since power is supplied to one processing system unit and power supply is shut off to the other processing system unit, the power consumption cost is suitably suppressed.

  The above is the embodiment of the present invention. The present invention is not limited to these embodiments and can be modified in various ranges.

  The video / audio output apparatus including the TV broadcast receiver according to the present embodiment is mounted on a vehicle, but may be a device that is carried by a person in another embodiment.

  In this embodiment, power supply to any one of the processing system units is cut off. However, in another embodiment, the supply amount is suppressed so that a minimum operation can be performed instead of cutting off the power supply. (It operates in the power saving mode). In this case, the video / audio output apparatus 10 includes an attenuator instead of the switches 16 and 34. When the control unit 10 controls the attenuation rate in the attenuator, power supply to the digital processing system unit or the analog processing system unit is suitably suppressed, and power saving is realized.

It is the block diagram which showed the structure of the video / audio output device which equipped with the TV broadcast receiver of embodiment of this invention. It is the flowchart which showed the TV broadcast program reproduction | regeneration processing in the video / audio output device of embodiment of this invention. It is the figure which showed notionally the reception information database stored in the memory of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Control part 11 Digital TV antenna 12 Digital TV tuner 13 OFDM demodulation part 14 MPEG decoder 15 Video | video changeover switch 16, 34 Switch 21 Audio | voice D / A converter 23 Audio | voice changeover switch 24 Audio amplifier 31 Analog TV antenna 32 For analog TV Tuner 33 Analog received signal demodulator 40 Memory 41 GPS receiver 50 Display 60R, 60L Speaker 70 Light receiver 80 Remote control 100 Video / audio output device 200 ACC power supply

Claims (7)

In a television broadcast receiver capable of receiving and demodulating a plurality of different types of television broadcasts, and outputting a demodulated signal of any of the formats to a playback device,
A plurality of processing system units for receiving and demodulating television broadcasts of a corresponding format;
Position information acquisition means for acquiring current position information;
Output determination means for determining a television broadcast of a receivable format based on the position information acquired by the position information acquisition means,
A television broadcast receiver characterized in that power is supplied to at least a processing system unit that receives and demodulates a television broadcast of the format determined by the output determining means among the plurality of processing system units. . In a television broadcast receiver capable of receiving and demodulating a plurality of different types of television broadcasts, and outputting a demodulated signal of any of the formats to a playback device,
A plurality of processing system units for receiving and demodulating television broadcasts of a corresponding format;
Position information acquisition means for acquiring current position information;
Output determination means for determining a television broadcast of a receivable format based on the position information acquired by the position information acquisition means,
The processing system unit that receives and demodulates a television broadcast of a format other than the format determined by the output determination unit among the plurality of processing system units is operated in a power saving mode. Television broadcast receiver.   The power supply to a processing system unit that receives and demodulates a television broadcast of a format other than the format determined by the output determination unit among at least one of the plurality of processing system units is cut off. Item 3. The television broadcast receiver according to Item 2. Further comprising a database that manages the reception status of each type of television broadcast in association with location information;
The output determination means searches the database using the position information acquired by the position information acquisition means as a key, and determines a receivable television broadcast based on the search result. The television broadcast receiver according to any one of claims 1 to 3. In a television broadcast receiver capable of receiving and demodulating simultaneous digital television broadcasting and analog television broadcasting, and outputting a demodulated signal of any one of the formats to a playback device,
A first processing system for receiving and demodulating digital television broadcasts;
A second processing system for receiving and demodulating analog television broadcasting;
Position information acquisition means for acquiring current position information;
Output determination means for determining a television broadcast of a receivable format based on the position information acquired by the position information acquisition means,
When the output determining means is determined to be digital television broadcasting, power is supplied to the first processing system unit, and power supply to the second processing system unit is shut off,
When the output deciding means decides on analog television broadcasting, power is supplied to the second processing system unit and power supply to the first processing system unit is cut off. John broadcast receiver. Further comprising a database that manages the reception status of each type of television broadcast in association with location information;
The output determination means searches the database using the position information acquired by the position information acquisition means as a key, and when the search result indicates that the reception state of any type of television broadcast is good, 6. The television broadcast receiver according to claim 5, wherein the television broadcast to be output to the playback device is determined to be a digital television broadcast.   The television broadcast receiver according to claim 1, wherein the television broadcast receiver is provided in a moving body.

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