JP2001169196A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver, capable of simplifying pulling around of a coaxial cable, even if the state of high receiving sensitivity and corresponds to diversity reception can be obtained. SOLUTION: In this television receiver 100, the RF television signal of 90 to 770 MHz received by antennas 1 is tuned at a tuner 3, converted to an intermediate frequency signal of a low frequency by frequency converting operation and then, transmitted to a television receiver main body 50 through the coaxial cable 2. Furthermore, a diversity control circuit 13, a signal detection circuit 10 and a microcomputer for tuning control 11 are also arranged in a tuner part 30, and this video wave detection signal is also transmitted via the cable 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver in which a receiving antenna and a television receiver body are connected by a cable and used.

[0002]

2. Description of the Related Art Among various types of television receivers, for example, in an in-vehicle television receiver, as shown in FIG. Since the antenna 1 is disposed outside the vehicle, the television receiver main body 50 and the receiving antenna 1 are connected by the coaxial cable 2.

[0003] Such an in-vehicle television receiver 10
FIG. 7 shows a block diagram of a conventional example of the "0". In FIG.
1 is a receiving antenna (hereinafter referred to as an antenna), 2 is a coaxial cable, 3 is a tuner, 4 is a SAW filter, 5 is an intermediate frequency amplifier circuit, 6 is a video demodulation circuit, 7 is a display element, 8
Is an audio demodulation circuit, 9 is a speaker, 10 is a signal detection circuit,
Reference numeral 11 denotes a microcomputer for tuning control.

[0004] The television receiver 100 shown here comprises:
For Japan, 90-77 received by antenna 1
The 0 MHz RF television signal (television reception signal) is supplied to the tuner 3 disposed in the television receiver main body 50 via the coaxial cable 2 as it is. The tuner 3 includes a tuning control microcomputer 11 as tuning control means.
Tuned to the RF TV signal, and the RF TV signal is converted to a predetermined intermediate frequency (video signal = 58.75 MHz, audio signal = 54.25 MH).
z) and output as a television signal (intermediate frequency signal). The television signal is filtered by the SAW filter 4 to remove the signal of the adjacent channel, and only the reception channel is extracted. In response, the intermediate frequency amplifier circuit 5 performs amplification detection, and outputs a video detection signal. After the video detection signal is subjected to signal processing and color demodulation by the video demodulation circuit 6, it is supplied to the display element 7 where an image is displayed. A part of the video detection signal is also supplied to an audio demodulation circuit 8, and after audio detection and amplification, is supplied to a speaker 9 and is output as an audio from the speaker 9.
Further, the video detection signal is also supplied to the signal detection circuit 10 to determine whether or not the signal is a television signal. The output of the signal detection circuit 10 is supplied to a microcomputer 11 for channel selection control, and is used to determine the presence or absence of a television signal at the time of search channel selection or automatic preset channel selection operation.

[0005] Such an in-vehicle television receiver 10
0, the coaxial cable 2 for supplying the television signal from the antenna 1 to the television receiver main body 50 needs to have a length of 5 to 6 m and is required to be flexible due to restrictions on installation in a vehicle. Therefore, a thin coaxial cable of about 1.5C2V is generally used.

FIG. 8 shows an example of a block diagram of an in-vehicle television receiver compatible with diversity reception. The configuration shown in FIG. 8 is different from the configuration shown in FIG. 7 in that antenna 1 has diversity receiving antennas A1, A2, A
3, the number of television receivers increased to four, A4
0, an RF switch circuit 12 as an antenna switching means for diversity operation and a diversity control circuit 13 as diversity control means are added. For this reason, in the following description, portions having common functions are denoted by the same reference numerals and are not illustrated, and description thereof is omitted, and only the configuration related to the diversity operation will be described.

[0007] In the in-vehicle television receiver 100 for diversity reception, the RF television signals received by the four diversity receiving antennas A 1, A 2, A 3, and A 4 are transmitted through four coaxial cables 2 to the television. Antenna input terminals a1, a of the John receiver body 50
2, a3 and a4. The respective antenna input terminals a1, a2, a3, a4 are connected to an RF switch circuit 12 for diversity operation, and the RF television reception signal selected by the RF switch circuit 12 is supplied to the tuner 3. The diversity control circuit 13 compares and determines the magnitude relationship of the antenna inputs based on the waveform change of the video detection signal accompanying the switching of the antenna input, and controls the RF switch circuit 12 so that the antenna with the maximum input is selected. Has become.

[0008]

In the television receiver 100 constructed as described above, the television receiver 100 shown in FIGS.
Towards 0, through a long coaxial cable 2 of 5-6 m,
To transmit high frequency RF TV signals as they are,
As the channel number increases, the loss in the coaxial cable 2 increases, which is a major factor in consequently deteriorating the television reception sensitivity.

That is, as shown in FIG. 9, in the relationship between the frequency and the amount of attenuation in the coaxial cable 2, the loss increases as the channel number increases (the frequency increases). UHF involves several dB of signal attenuation. As a result, the receiving sensitivity of the television deteriorates.

[0010] In addition, the in-vehicle television receiver 100 for diversity reception described with reference to FIG.
Since the same number of coaxial cables 2 as the number of antennas 1 are required, it is necessary to route as many as four coaxial cables 2 from the position where the antenna 1 is disposed to the position where the television receiver main body 50 is disposed. There is a problem that it is quite difficult to apply a proper wiring inside the vehicle.

In view of the above problems, an object of the present invention is to
An object of the present invention is to provide a television receiver capable of obtaining high reception sensitivity in any reception channel by reducing transmission loss of a television reception signal in a cable.

Another object of the present invention is to provide a configuration of a vehicle-mounted television receiver compatible with diversity reception that can simplify the routing of a coaxial cable.

[0013]

In order to solve the above-mentioned problems, according to the present invention, at least a receiving antenna, a television receiving signal received by the receiving antenna, are selected and frequency-converted to output an intermediate frequency signal. And a tuner, wherein the tuner is disposed near the receiving antenna, and the intermediate frequency signal is transmitted from the tuner side to a television receiver main body by a cable. .

According to the present invention, the tuner is disposed near the receiving antenna, and the tuner receives 90 to 770M signals received by the receiving antenna.
Hz of a television reception signal is converted into an intermediate frequency signal (video signal =
(58.75 MHz, audio signal = 54.25 MHz), and then transmitted from the tuner side to the television receiver body via a cable. For this reason, what is transmitted by the cable is an intermediate frequency signal having a lower frequency than the television reception signal. If such an intermediate frequency signal is used, the transmission loss in the cable is exemplarily shown in FIG. Less is. Therefore, high reception sensitivity can be obtained in any of the reception channels.

In the present invention, it is preferable that the receiving antenna and the tuner are integrated.

In the present invention, it is preferable that power is supplied from the television receiver body to the tuner via the cable. Although power supply is required to operate the tuner, in the present invention, since the tuner and the television receiver main body are connected by a cable, if this cable is used, the tuner and the television receiver main body can be connected to each other. Can be easily supplied from the television receiver body to the tuner.

In the present invention, when a tuning control means is provided on the side of the television receiver main body, the tuning control means transmits the tuner from the television receiver main body via a bus line. It is preferable to perform tuning control on the tuner by transmitting a tuning control signal to the tuner.

In the present invention, a tuning control means may be arranged near the receiving antenna, and when such a configuration is adopted, the tuning control means may be provided from the main body of the television receiver. The tuner may be configured to perform tuning control based on a tuning control signal transmitted via a signal line.

In this case, it is preferable that the tuning control means is formed integrally with the receiving antenna.

In the present invention, when the television receiver is configured to support diversity reception, a plurality of diversity reception antennas are used as the reception antennas, and antenna switching means for switching these diversity reception antennas. And a diversity control means for performing antenna switching control by the antenna switching means.

In such a television receiver compatible with diversity reception, the antenna switching means is arranged near the receiving antenna, while the diversity control means is arranged on the side of the television receiver main body. Preferably, the antenna switching means performs an antenna selection operation based on a control signal transmitted from the diversity control means disposed in the television receiver body via a signal line. By arranging the diversity antenna and the antenna switching means close to each other, a television reception signal can be input to the antenna switching means directly or via a short cable, so that the transmission loss is small and the space is small. The diversity antennas and the antenna switching means can be connected within each other.

In this case, it is preferable that the antenna switching means is formed integrally with the receiving antenna.

In the present invention, a decoder is disposed near the receiving antenna, and the decoder decodes a control signal transmitted from the television receiver via the signal line to switch the antenna. It is preferable to configure so as to output to the means.

In this case, it is preferable that the antenna switching means and the decoder are formed integrally with the receiving antenna.

In the present invention, it is preferable that the antenna switching means and the diversity control means adopt a configuration arranged near the reception antenna, and when such a configuration is adopted, the diversity control means is An antenna switching control for the antenna switching means is performed based on a video detection signal transmitted from the television receiver via a signal line.

In such a configuration, the antenna switching means and the diversity control means are
It is preferable that the antenna is integrally formed with the receiving antenna.

In the present invention, a first frequency separating means is arranged on the side of the receiving antenna, while a second frequency separating means is formed on the television receiver main body, and the intermediate frequency signal is The first frequency separation means, the cable, and the second frequency separation means are transmitted in this order from the tuner to the television receiver main body, and the video detection signal is transmitted to the second frequency separation means. Preferably, the signal is transmitted from the television receiver main body to the tuner through the means, the cable, and the first frequency separating means in this order.

The present invention is used, for example, in an environment where there is a restriction that wiring must be routed in a narrow space, such as an in-vehicle television receiver, and the reception conditions are poor. It is effective when applied to things.

[0029]

Embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are
Since the basic configuration is common to the conventional one, portions having common functions are denoted by the same reference numerals and described.

[Embodiment 1] FIG. 1 is a block diagram showing a configuration of a television receiver according to Embodiment 1 of the present invention.

The basic configuration and operation of the television receiver 100 shown in FIG. 1 are the same as those of the conventional television receiver described with reference to FIG. The 770 MHz RF television signal (television reception signal) is supplied to the tuner 3. The tuner 3 includes a tuning control microcomputer 1 as tuning control means.
1 is selected and controlled, and the RF television signal is tuned to a predetermined intermediate frequency (video signal = 58.75 MHz, audio signal = 54.25).
MHz), and further amplifies and outputs as an intermediate frequency signal. The SAW filter 4 removes the signal of the adjacent channel from the intermediate frequency signal, extracts only the reception channel, and supplies the signal to the intermediate frequency amplifier circuit 5. In response, the intermediate frequency amplification circuit 5 performs amplification detection,
A video detection signal is output. After the video detection signal is subjected to signal processing and color demodulation by the video demodulation circuit 6, it is supplied to the display element 7 where an image is displayed. A part of the video detection signal is also supplied to an audio demodulation circuit 8, and after audio detection and amplification, is supplied to a speaker 9 and is output as an audio from the speaker 9. Further, the video detection signal is also supplied to the signal detection circuit 10 to determine whether or not the signal is a television signal. The output (tuning control signal) of the signal detection circuit 10 is supplied to a tuning control microcomputer 11 as a tuning control means, and is used to determine the presence or absence of a TV signal during search tuning or auto-preset tuning operation. Can be

In the on-vehicle television receiver 100 configured as described above, the tuner 3 is configured as a tuner section 30 disposed near the antenna 1, and the intermediate frequency signal output from the tuner 3 is transmitted to the coaxial cable 2. Is transmitted from the tuner 3 to the television receiver main body 50. That is, in the present embodiment, the tuner 3 is taken out from the television receiver main body 50, provided as a tuner section 30 near the antenna 1, and the intermediate frequency signal output from the tuner is transmitted through the coaxial cable 2 to the S of the television receiver.
The power is supplied to the AW filter 4. Note that, in the tuner section 30, the tuner 3 and the antenna 1 are integrally formed.

Here, the output impedance of the intermediate frequency signal output from the tuner 3 is generally 75Ω, and the input impedance of the SAW filter 4 is originally matched to 75Ω for use. There is no problem in transmitting an intermediate frequency signal of a television using a coaxial cable 2 such as 1.5C2V having a characteristic impedance of 75Ω used as a cable.

With such a configuration, the RF television signal of 90 to 770 MHz received by the antenna 1 is tuned by the tuner 3 and the frequency conversion operation converts the video intermediate frequency signal of 58.75 MHz and 54 .
Since the signal is converted into an intermediate frequency signal composed of a 25 MHz audio intermediate frequency signal and output from the tuner unit 30, the intermediate frequency signal transmitted through the coaxial cable 2 has a constant frequency regardless of the receiving channel. The television signal transmitted via the cable 2
The frequency is lower than that of the RF television signal received in the step (a). Therefore, as is clear from FIG. 9, the signal loss in the coaxial cable 2 is about 0.5 dB, and the loss in the coaxial cable 2 is negligible in terms of reception sensitivity and S / N degradation. Therefore, the RF television reception signal received by the antenna 1 is supplied to the tuner 3 with almost no loss, so that the deterioration of the reception sensitivity is almost eliminated regardless of the reception channel. Therefore, when compared with the conventional television receiver, the maximum channel of the UHF high channel is 6 dB.
This improves the receiving sensitivity.

Further, the television receiver 100 of the present embodiment
In this case, since the tuner 3 is disposed at a position away from the television receiver main body 50, the tuner 3 is remotely controlled by the tuning microcomputer 11. However, the tuner 3 is generally controlled by a bus control. Is performed, the number of control lines 2 'as bus lines can be reduced. Therefore,
Even in a narrow car, the wiring processing can be easily performed as compared with a coaxial cable for transmitting a television signal.

[Second Embodiment] FIG. 2 is a block diagram showing a configuration of a television receiver according to a second embodiment of the present invention.

Referring to FIG. 2, a television receiver 100 according to the present embodiment is an in-vehicle television receiver compatible with diversity reception. The difference from the configuration shown in FIG. A2,
A4, A4, A4, RF switch circuit 1 as antenna switching means for diversity operation
Second, a diversity control circuit 13 as a diversity control means and a decoder circuit 14 described later are added.

The basic configuration and operation of the in-vehicle television receiver 100 for diversity reception having the above-described configuration is the same as that of the conventional television receiver described with reference to FIG. The RF television signals received by the diversity receiving antennas A1, A2, A3, A4 are directly transmitted to the RF switch circuit 12 for diversity operation, and the RF television reception signals selected by the RF switch circuit 12 are transmitted. It is supplied to the tuner 3. The diversity control circuit 13 compares and determines the magnitude relationship of the antenna inputs based on the waveform change of the video detection signal accompanying the switching of the antenna input, and controls the RF switch circuit 12 so that the antenna with the maximum input is selected. Has become.

In this embodiment, the tuner 3 and the RF switch circuit 12 are formed integrally with a tuner 30 separate from the television receiver main body 50. The tuner 30 is provided near the antenna 1 near the antenna 1. And is configured integrally.

For this reason, the output of the antenna 1 is directly connected to the antenna input terminals a1 to a4, and the RF television signal received by the antenna 1 is supplied to the tuner 3 only through the RF switch circuit 12. become. Therefore,
Since the RF television signal received by the antenna 1 is not transmitted through the coaxial cable 2 as it is, loss due to transmission of the RF television signal is basically eliminated, and deterioration of the receiving sensitivity is minimized in any receiving channel. Can be minimized.

In this embodiment, as in the first embodiment,
An RF television signal of 90 to 770 MHz received by the antenna 1 is an intermediate frequency signal composed of a video intermediate frequency signal of 58.75 MHz and an audio intermediate frequency signal of 54.25 MHz by tuning in the tuner 3 and frequency conversion operation. Is output after being converted to a coaxial cable 2
The intermediate frequency signal transmitted through the coaxial cable 2 has a constant frequency irrespective of the receiving channel, and the television signal transmitted through the coaxial cable 2
The frequency is lower than that of the F television signal. Therefore, the loss in the coaxial cable 2 becomes a negligible level in terms of reception sensitivity and S / N degradation. Accordingly, the television reception signal received by the antenna 1 is supplied to the tuner 3 with almost no loss, so that the deterioration of the reception sensitivity is almost eliminated irrespective of the reception channel, and the conventional television receiver is different from the conventional television receiver. By comparison, up to 6d for UHF high channel
This means that the B-level reception sensitivity can be improved.

Further, the television receiver 10 of the present embodiment
In the case of 0, the tuner 3 is arranged at a position distant from the television receiver main body 50. Therefore, the tuner 3 is remotely controlled by the tuning microcomputer 11, but the tuner unit 3
0 and the television receiver main body 50 are connected by a control line 2 'as a bus line. That is, since the bus control is generally performed for the tuning control of the tuner 3,
According to this embodiment, the number of control lines 2 'as bus lines can be reduced. Therefore, even in a narrow car, the wiring process is easier than a coaxial cable for transmitting a television signal.

Furthermore, in the present embodiment, the diversity control circuit 13 is disposed in the television receiver main body 50, while the tuner section 30 is provided with the tuner 3 and the decoder circuit 14.

Therefore, when transmitting the antenna switching signal from the diversity control circuit 13 to the tuner unit 30, only two (two-bit) signal lines 2 ″ may be used, so that the number of signal lines can be reduced.

After decoding the antenna switching signal transmitted from the diversity control circuit 13 to the tuner section 30, the decoder circuit 14 decodes the four control lines 3
1 to the input of the RF switch 12.

[Third Embodiment] FIG. 3 is a block diagram showing a configuration of a television receiver according to a third embodiment of the present invention.

In FIG. 3, the television receiver 100 of the present embodiment is also an in-vehicle television receiver compatible with diversity reception. In this embodiment, the diversity control circuit 13 also controls the detection of the video detection signal accompanying the switching of the antenna input. Compare and judge the magnitude relationship of antenna input based on the waveform change,
The RF switch circuit 12 is controlled so that the antenna with the maximum input is selected.

Here, the diversity control circuit 13
The tuner 30 is provided near the antenna 1. For this reason, the signal line 2 ″ may be one for supplying the video detection signal from the television receiver main body 50 to the diversity control circuit 13.
The number of signal lines between the tuner section 30 and the television receiver main body 50 can be reduced.

The other structure is the same as that of the second embodiment, and the description is omitted.

[Fourth Embodiment] FIG. 4 is a block diagram showing a configuration of a television receiver according to a fourth embodiment of the present invention.

In FIG. 2, a television receiver 100 according to the present embodiment is an in-vehicle television receiver compatible with diversity reception. In this embodiment, a video detection signal is also supplied to a signal detection circuit 10 and a television signal is output. Is determined. The output of the signal detection circuit 10 is supplied to a tuning control microcomputer 11 as a tuning control means, and is used to determine the presence or absence of a television signal at the time of search tuning or auto preset tuning operation.

Here, both the signal detection circuit 10 and the channel selection control microcomputer 11
The diversity control circuit 13, the antenna 1, and the tuner 3 are integrally formed. Therefore, the signal detection circuit 1
The signal line 2 ″ for supplying the video detection signal to the diversity control circuit 13 is supplied to supply the video detection signal to 0.
Is available. Therefore, the bus control signal line 2 '(see FIG. 3) for selecting a channel can be eliminated, and the number of wires between the tuner unit 30 and the television receiver main body 50 can be further reduced. .

Other configurations are the same as those of the first and second embodiments, and therefore the description is omitted.

[Fifth Embodiment] FIG. 5 is a block diagram showing a configuration of a television receiver according to a fifth embodiment of the present invention.

In FIG. 5, the television receiver 100 according to the present embodiment is an in-vehicle television receiver compatible with diversity reception, and also in this embodiment, the diversity control circuit 13 controls the detection of the video detection signal accompanying the switching of the antenna input. Compare and judge the magnitude relationship of antenna input based on the waveform change,
The RF switch circuit 12 is controlled so that the antenna with the maximum input is selected. The video detection signal is also supplied to the signal detection circuit 10 to determine whether or not the signal is a television signal. The output of the signal detection circuit 10 is supplied to a tuning control microcomputer 11 as a tuning control means, and is used to determine the presence or absence of a television signal at the time of search tuning or auto preset tuning operation.

Here, the diversity control circuit 13
The tuner 30 is provided. The signal detection circuit 10
The tuning control microcomputer 11 is also provided in the tuner unit 30. Therefore, when transmitting the video detection signal from the television receiver main body 50 to the tuner unit 30,
In the present embodiment, such a video detection signal is transmitted using the coaxial cable 2 for transmitting an intermediate frequency signal from the tuner 3 to the receiver main body 50.

That is, while the first frequency separator 41 is arranged in the tuner section 30, the television receiver 5
At 0, a second frequency separator 42 is disposed, and bidirectional transmission is performed between the tuner unit 30 and the television receiver 50 via the coaxial cable 2. Therefore, in the present embodiment, the intermediate frequency signal is the first frequency separator 41,
The signal passes through the coaxial cable 2 and the second frequency separator 42 in this order and is transmitted from the tuner unit 30 to the television receiver main body 50, and the video detection signal is transmitted to the second frequency separator 42, the coaxial cable 2 and the first Are transmitted from the television receiver body 50 to the tuner unit 30 through the frequency separator 41 in this order.

Therefore, in this embodiment, the tuner section 30 and the television receiver main body 50 need only be connected by the coaxial cable 2 alone.

The other structures are substantially the same as those of the first to fourth embodiments, and the description thereof is omitted.

[Other Embodiments] It is necessary to supply power from the television receiver body 50 to the tuner unit 30. Such power supply is performed by the tuner unit 30 and the television receiver body. What is necessary is just to use the coaxial cable 2 which connects between 50. Here, power supply is performed by superimposing a power supply voltage on the coaxial cable 2 for transmitting a television signal, which is generally performed by supplying power to a booster for an outdoor antenna or an antenna for receiving satellite broadcasting. Obviously, this can be realized without providing the power supply wiring.

In the diversity-compatible television receiver 100 shown in FIGS. 2 to 5, the antennas A1 to A1 are used in order to enhance the effect of diversity reception.
It is preferable to separate the mounting positions of the antennas 4 from each other, but in order to make the most of the effect of the present invention, the antenna is divided into two systems as in the prior art, and one of the antennas is integrated with the tuner unit 30 or the tuner unit 30 is integrated. , While one other system is located near the tuner unit 30, it is installed at a distant position compared to the other system, and the antenna output is set to the RF switch of the tuner unit 30 by a short coaxial cable. You may make it supply to an input terminal.

[0062]

As described above, according to the present invention, the distance between the antenna section and the television receiver body is VHF or UH.
Since a high-frequency signal such as an F television broadcast wave is not transmitted as it is, but is transmitted after being converted to a specific intermediate frequency, transmission loss in a cable can be greatly reduced. Therefore, it is possible to realize a television receiver that can obtain high receiving sensitivity in any receiving channel.

[Brief description of the drawings]

FIG. 1 is a lock diagram showing a configuration of a television receiver according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration of a diversity-compatible vehicle-mounted television receiver according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a diversity compatible in-vehicle television receiver according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a diversity-equipped in-vehicle television receiver according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a diversity compatible in-vehicle television receiver according to a fifth embodiment of the present invention.

FIG. 6 is an explanatory diagram of an automobile equipped with a television receiver.

FIG. 7 is a block diagram showing a configuration of a conventional in-vehicle television receiver.

FIG. 8 is a block diagram showing a configuration of a conventional diversity-equipped in-vehicle television receiver.

FIG. 9 shows an example of a loss characteristic of a coaxial cable.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 antenna 2 coaxial cable 3 tuner 4 SAW filter 5 intermediate frequency amplifying circuit 6 video demodulation circuit 7 display element 8 audio demodulation circuit 9 speaker 10 signal detection circuit 11 microcomputer for channel selection control (channel selection control means) 12 RF switch circuit 13 diversity Control circuit (diversity control means) 14 Decoder circuit 30 Tuner section 31 Control line 41 First frequency separator (first frequency separation means) 42 Second frequency separator (second frequency separation means) 50 Television reception Main unit 100 Television receiver

Claims (15)

[Claims] 1. A television receiver having at least a receiving antenna and a tuner that performs channel selection and frequency conversion on a television signal received by the receiving antenna and outputs an intermediate frequency signal, wherein the tuner comprises: The television receiver, which is arranged near the reception antenna, wherein the intermediate frequency signal is transmitted from the tuner side to a television receiver body via a cable. 2. The television receiver according to claim 1, wherein the receiving antenna and the tuner are integrated. 3. The television receiver according to claim 1, wherein power is supplied from the television receiver body to the tuner via the cable. 4. The method according to claim 1, wherein
Tuning control means is arranged on the side of the television receiver main body, and the tuning control means transmits the tuner control signal from the main body of the television receiver to the tuner via a bus line. A television receiver for performing channel selection control on the television receiver. 5. The method according to claim 1, wherein
A tuning control unit is configured near the receiving antenna, and the tuning control unit is configured to select a channel in the tuner based on a tuning control signal transmitted from the main body of the television receiver via a signal line. A television receiver for performing control. 6. The television receiver according to claim 5, wherein said tuning control means is integrated with said receiving antenna. 7. The method according to claim 1, wherein
A television comprising: a plurality of diversity receiving antennas as the receiving antennas; antenna switching means for switching the diversity receiving antennas; and diversity control means for controlling antenna switching by the antenna switching means. John receiver. 8. The antenna switching means according to claim 7, wherein said antenna switching means is arranged near said receiving antenna, while said diversity control means is arranged on said television receiver main body side. Comprises a television receiver for performing an antenna selection operation based on a control signal transmitted via a signal line from the diversity control means disposed in the television receiver body. 9. The television receiver according to claim 8, wherein said antenna switching means is integrated with said receiving antenna. 10. The decoder according to claim 8, wherein a decoder is arranged near the receiving antenna, and the decoder decodes a control signal transmitted from the television receiver via the signal line. A television receiver for outputting to the antenna switching means. 11. The television receiver according to claim 8, wherein said antenna switching means and said decoder are integrated with said receiving antenna. 12. The television receiver according to claim 7, wherein the antenna switching unit and the diversity control unit are arranged near the reception antenna, and the diversity control unit is transmitted from the television receiver via a signal line. A television receiver for performing antenna switching control for said antenna switching means based on an incoming video detection signal. 13. The television receiver according to claim 12, wherein said antenna switching means and said diversity control means are integrally formed with said receiving antenna. 14. The television receiver according to claim 12, wherein a first frequency separating means is arranged on the side of the receiving antenna, while a second frequency separating means is formed in the television receiver main body. The intermediate frequency signal is transmitted from the tuner to the television receiver body through the first frequency separation unit, the cable, and the second frequency separation unit in this order, and the video detection signal is A television receiver transmitted from the television receiver main body to the tuner through the second frequency separation unit, the cable, and the first frequency separation unit in this order. 15. The television receiver according to claim 1, wherein the television receiver is configured to be mounted on a vehicle.