JPH01256823A - Method and apparatus for satellite broadcast community tv reception - Google Patents

Abstract

PURPOSE:To obtain a picture and an audio signal excellent for a community TV receiving equipment by supplying satellite broadcast signal from other satellite broadcast receiver with excellent reception state to a satellite broadcast receiver receiving a satellite broadcast signal only at a small level via a transmission line. CONSTITUTION:If a rainfall exists in a district where satellite broadcast receivers 2a, 2b are installed and an output of a level detection comparison section 6a of a satellite broadcast transmitter-receiver 2a is smaller than a minimum level required to obtain excellent picture and audio signal, a control section 14 throws a changeover switch 20b of a distribution controller 8b of the satellite broadcast receiver 2b to the position of terminal D connecting to the transmission line 12a. Thus, the satellite broadcast signal received by the satellite broadcast receiver 2b is supplied to a head end connecting to a terminal C of a distribution controller 8a. Thus, even in a community TV receiving equipment belonging to the satellite broadcast receiver 2a allocated to a district having a rainfall can view the satellite broadcast with excellent picture and audio signal.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method and apparatus for receiving satellite broadcasting signals from the same broadcasting satellite in different regions.

<Prior art> Conventionally, when receiving satellite broadcasting, a satellite broadcasting receiving antenna is installed in the area where the reception is to be performed, and the frequency of the satellite broadcasting signal received by this antenna is converted to an IGH2 band signal using a BS converter. , band signals are frequency-converted into UHF band signals or baseband signals by a BS tuner, and are supplied to the head end of a communal viewing device and then to a television receiver in each home.

<Problems to be Solved by the Invention> However, when satellite broadcasting is received in this way, changes in weather conditions, such as rain, will cause the radio waves from the broadcasting satellite to be greatly attenuated, reducing the reception level. I couldn't get good images or sound. As a solution to this problem, it may be possible to use a large-diameter parabolic antenna as an antenna for receiving satellite broadcasting, but the diameter of the parabolic antenna that is generally reprinted for receiving satellite broadcasting is about 200 cm at its largest. Therefore, even when using this maximum, it was not possible to obtain good images and sounds when it was raining.

The present invention has been made in view of the above points, and an object of the present invention is to provide a method and apparatus that can satisfactorily receive satellite broadcasting even when weather changes such as rain occur.

<Means for Solving the Problems> The present invention provides that satellite broadcast receiving devices used together with communal viewing and viewing equipment are often installed in different areas, and that all of these installation locations are subject to weather conditions such as rainfall. Taking advantage of the fact that the probability of both deteriorations occurring at the same time is relatively low,
This solves the above problems.

That is, the method of the present invention involves a plurality of satellites, each of which is located in a different region, receives a satellite broadcasting signal from the same broadcasting satellite, and transmits the received satellite broadcasting signal to a joint viewing device subordinate to each satellite. It comprises a broadcast receiving device, and a transmission line connected between each of the satellite broadcast receiving devices so that the signals received by each of the satellite broadcast receiving devices can be transmitted to the satellite broadcast receiving device, and each of the satellite broadcast receiving devices When one of the satellite broadcasting signals becomes lower than a predetermined level, the transmission line is connected to the satellite broadcasting receiver from another satellite broadcasting receiver that is receiving the satellite broadcasting signal at the above level or higher. The present invention is characterized in that the satellite broadcasting signal is transmitted to the dependent communal viewing device in place of the satellite broadcasting signal received by the satellite broadcasting receiving device whose level has been reduced.

Further, the apparatus of the present invention is provided with a plurality of satellite broadcast receiving apparatuses and a transmission line, as well as a control means, as in the above-mentioned method.

Each satellite broadcast receiving device includes a receiving unit that receives the satellite broadcast signal, and generates a first determination signal when the satellite broadcast signal is higher than a predetermined level, and generates a second determination signal when the satellite broadcast signal is lower than a predetermined level.
determining means for generating a determination signal; and inputting the satellite broadcasting signal from the receiving section and the satellite broadcasting signal from another of the satellite broadcasting receivers supplied via the transmission line, In accordance with the selection signal, the satellite broadcasting signal of the receiving section is transmitted to the joint viewing device, and is also transmitted to other satellite broadcasting receiving devices other than the one to which the satellite broadcasting signal has been inputted, via the transmission line, and a second transmitting the satellite broadcast signal from the other satellite broadcast receiver to the joint viewing device according to the selection signal of and distribution control means for transmitting the data. The control means inputs the determination signals from the determination means of each satellite broadcast receiving device, supplies the first selection signal to the satellite broadcast receiving device that has generated the first determination signal, and performs the second determination. The second selection signal is configured to be supplied to the satellite broadcast receiving device that generated the signal.

<Operation> The operation of the method of this invention will become clear by explaining the operation of the apparatus of this invention, so only the operation of the apparatus will be explained. The determining section of each satellite broadcast receiving device supplies a first or second determining signal to the control means depending on the level of the signal received by the receiving section. Since the satellite broadcasting receiving device that has supplied the first determination signal receives the satellite broadcasting signal at a level higher than the predetermined level,
That is, since a sufficiently good image and sound can be obtained with the satellite broadcast signal received by the receiving section of the satellite broadcast receiver, the control means sends the signal to the distribution control device of the satellite broadcast receiver that has supplied the first determination signal. A first selection signal is provided. As a result, the satellite broadcast receiving device sends a satellite broadcast signal obtained from good images and sounds received by the receiving unit to the communal viewing and viewing device. In addition, since the satellite broadcasting receiving device that has supplied the second determination signal is receiving the satellite broadcasting at a level lower than the predetermined level, that is, the satellite broadcasting is being received at the receiving unit of the satellite broadcasting receiving device. Since good images and sounds cannot be obtained with satellite broadcasting signals, the control means supplies the second selection signal to the distribution control means of the satellite broadcasting receiving device that has supplied the second determination signal. Satellite broadcasting signals from other satellite broadcasting receiving apparatuses from which good images and sounds can be obtained are sent to the broadcasting receiving apparatus via a transmission line.The distribution control means sends the signals to the communal viewing apparatus. Therefore, according to the satellite broadcasting joint reception device according to the present invention,
Even if there are changes in weather conditions such as rain, good satellite broadcasting images and audio will always be provided to any joint viewing device.

<Embodiment> As shown in FIG. 1, this embodiment includes satellite broadcast receiving devices 2a to 2d. These satellite broadcast receivers 2
a to 2d are parabolic antennas 4a to 4d, respectively.
, level detection comparison units 6a to 6d, distribution control devices 8a to 8d, and opening/closing switches 10a to 10d, and the distribution control devices 8a to 8d of each satellite broadcast receiving device 2a to 2d are connected to each other by transmission lines (coaxial cable ) 12a to 12d, and the distribution control devices 8a to 8d of each satellite broadcast receiving device 2a to 2d and the open/close switch 10a.
10d to 10d are controlled by the control unit 14.

The satellite broadcast receiving devices 2a to 2d are installed in different regions as shown in FIG. It is intended to feed the head end of a collaborative viewing system. Each satellite broadcast receiver 2a
Parabolic antennas 4a to 4d of 2d to 2d receive satellite broadcasting signals from broadcasting satellites and supply them to a BS converter (not shown).

This BS converter converts satellite broadcast signals to, for example, IGII.
The signal is frequency-converted to a Z-band signal and supplied to level detection and comparison sections 6a to 6d. These level detection comparison units 6a to 6d
detects the level of the input IGHz band signal, compares this detection level with a predetermined level (the minimum level necessary to obtain good images and sound), and determines whether the detection level is the predetermined level. If it is above, for example, the output is "1"
(first determination signal), and if it is smaller than a predetermined level, for example, an output "0" (second determination signal) is generated. Each of these level detection comparison units 6a to 6
The output (judgment signal) generated by d is supplied to the control unit 14 using a telephone line or the like.

The output of the BS converter is the on/off switch lOa to 10
d to the distribution control devices 8a to 8d. The distribution control devices 8a to 8d include distributors 16a to 16d as shown in FIG.
6d has four terminals A to C, and according to the control signal supplied from the control unit 14 via the telephone line, 7(1) the satellite broadcasting signal supplied to terminal A is transmitted to terminals B and C.
, D. (2) The satellite broadcasting signal supplied to terminal C is distributed to terminal B.

(3) A state in which the satellite broadcasting signal supplied to terminal D is distributed to terminals B and C; Terminal A is connected to the output side of the BS converter via the above-mentioned on/off switches lOa to 10d, and terminal B is connected to the head end of the communal viewing device.

Terminals C and D are selector switches 18a to 18d and 20a.
It is connected to transmission lines 12a to 12d via lines 20d to 20d. That is, the terminal C of the distributor 16a is connected to the terminal of the distributor 16b via the changeover switch 18a, the transmission line 12a, and the changeover switch 20b, and the terminal C of the divider 16b is connected to the changeover switch 18b, the transmission line 12b, It is connected to a terminal of the distributor 16c via a changeover switch 20c. Similarly, the terminal C of the distributor 16c is connected to the terminal of the distributor 16d via the changeover switch 18c, the transmission line 12c, and the changeover switch 20d, and the terminal C of the divider 15d is connected to the changeover switch 18d, the transmission line 12d, It is connected to a terminal of the distributor 16a via a changeover switch 20a. Since the satellite broadcasting signal has a wide band of 27 MHz, the transmission lines 12a to 12d are lines having frequency characteristics that can transmit such a wideband satellite broadcasting signal without distortion. In addition, the changeover switch 18a
18d to 20a to 20d are connected to dummy resistors 22a to 22d and 24a to 24d when the terminals C and D are not connected to the transmission lines 12a to 12d. These changeover switches 18a to 18d and 20a to 20d are also controlled by control signals from the control section 14 supplied via the telephone line.

The control unit 14 is configured by a microcomputer, for example, and controls each satellite broadcast receiving device 2a according to the satellite broadcast signal supplied from each level detection comparison unit 6a to 6d.
Open/close switches 10a to 10d, distribution control devices 8a to 8d, and changeover switches 18a to 18d, 2
Controls 0a to 20d.

Level detection comparison unit 6 of each satellite broadcast receiving device 2a to 2d
When the outputs of a to 6d are all rlJ, that is, when the reception level of the satellite broadcasting signal in each satellite broadcasting receiving device 2a to 2d is equal to or higher than the minimum level necessary to obtain good images and sounds, the control unit 14 are the respective closed switches IOa to 1
0d, and terminal A of each distribution control device 8a to 8d.
The output from the BS converter is supplied to the BS converter. The control unit 14 also controls the distributor 16a of each distribution control device 12a to 12d.
A control signal is supplied to terminals B to 16d to distribute the satellite broadcasting signal supplied to terminal A to terminals B, C, and D.

Therefore, the satellite broadcast signals supplied to each terminal A via the switches 10a to 10d are supplied from each terminal B to the head ent. At this time, the control unit 14 switches the changeover switches 18a to 18d and 20a to 20d so that the dummy resistors 22a to 22d and 24a to 24d are connected to the terminals C and D of each distribution control device, respectively.

As a result, the six distributors 16a to 16d are matched, and no reflection occurs.

In such a state, for example, as shown in FIG. 2, there is rain in the area where the satellite broadcast receivers 2a, 2c are installed, and the level detection comparison unit 6 of these satellite broadcast receivers 2a, 2C
When the outputs of a and 6c become "0", that is, when the reception level of the satellite broadcast signal at the satellite broadcast receivers 2a and 2C becomes lower than the minimum level necessary to obtain good images and sounds, the control The unit 14 is a satellite broadcast receiving device 2b.
Switch the changeover switch 20b of the distribution control device 8b so that the terminal terminal is connected to the transmission line 12a, change the changeover switch 18a of the distribution control device 8a so that the terminal C is connected to the transmission line 12a, and further control the distribution. The distributor 16a of the distribution control device 8a is switched so that the satellite broadcasting signal supplied to the terminal C of the device 8a is distributed to the terminals B and D.

Also, the open/close switch 10a is opened. by this,
The satellite broadcasting signal received by the satellite broadcasting receiver 2b is sent to the head end connected to the terminal C of the distribution control device 8a through the changeover switch 20b, the transmission line 12a, and the changeover switch 1.
8a. The control unit 14 also switches the changeover switch 20d so that the terminal of the 1-distribution control device 8d is connected to the transmission line 12c, and switches the changeover switch 20d so that the terminal C of the distribution control device 8c is connected to the transmission line 12c. 18c, and also the distributor 1 of the distribution control device 8C.
6c switches the satellite broadcast signal supplied to terminal C to be distributed to terminals B and D. In addition, the open/close switch 10c
to open. As a result, the satellite broadcast signal from the satellite broadcast receiver 2d is supplied to the terminal C of the distribution control device 8C via the changeover switch 20d and the transmission line 12C1 changeover switch 18c, and is then supplied from the terminal B to the head end. As a result, satellite broadcasting can be viewed with good images and sounds even in the communal viewing equipment subordinate to the satellite broadcasting receivers 2a and 2C, which are located in areas with rainfall. In addition, dummy resistors 22a and 22 are connected to the terminals of the distribution control devices 8a and 8C.
dummy resistors 22b, 22c are connected to terminals C of distribution control devices 8b, 8d such that
The changeover switches 20a, 20d, 18b, and 18d are switched. This causes no reflections. Also, when the rain has finished, the outputs of the level detection comparison units 6a and 6b are rl.
When the state returns to J, the open/close switches 10a and 10c are closed, and the distributor 16aJ6c is switched to a state in which the satellite broadcasting signal supplied to terminal A is distributed to terminals B, C, and D. Even if it rains in the area where other satellite broadcasting receivers are installed, satellite broadcasting signals will be transmitted from the satellite broadcasting receiver in the area where there is no rain in the same way as above, so you can enjoy good images and sound. You can get .

In the above embodiment, the satellite broadcast receiving devices 2a to 2d are connected in a loop using the transmission lines 12a to 12d, but for example, the transmission line 12d may be removed to connect the satellite broadcast receiving devices 2a to 2d in series. You may.

Further, in the above embodiment, a satellite broadcasting signal frequency-converted to ICl3 using a BS converter was used, but a signal obtained by converting the output of the BS converter to a UHF band or baseband signal using a BS tuner may also be used. moreover,
Optical fibers can also be used as transmission lines.

<Effects> As described above, according to the present invention, satellite broadcasting in which the weather conditions change and the satellite broadcasting signal can only be obtained at a level lower than the lowest level at which good images and sound can be obtained. Satellite broadcasting signals are supplied to the receiving device via transmission lines from other satellite broadcasting receiving devices that are receiving satellite broadcasting signals at a level higher than the minimum level at which good images and sound can be obtained. It is possible to supply a satellite broadcasting signal at a level that allows good images and sound to be obtained even to the communal viewing device connected to the broadcasting receiving device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the satellite broadcasting joint reception device according to the present invention, FIG. 2 is a schematic diagram showing the usage state of the same embodiment, and FIG. 3 is a detailed diagram of each distribution control device of the same embodiment. It is a block diagram. 2a to 2d...Satellite broadcasting receiver, 6a to 6d
...Level detection comparison section, 8a to 8d...Distribution control device, 12a to 12d...Transmission line, 14.
...control section. Patent applicant DAYX Antenna Co., Ltd. Agent
People Tetsu Shimizu and 2 others 1 figure, 2 figures, 1 o'llll'3 figures

Claims (2)

[Claims] (1) a plurality of satellite broadcast receiving devices, each of which is located in a different area, receives a satellite broadcast signal from the same broadcast satellite, and transmits the received satellite broadcast signal to a joint viewing device subordinate to each; In an apparatus comprising a transmission line connected between each of the satellite broadcasting receivers so that the satellite broadcasting signal received by each of the satellite broadcasting receivers can be transmitted to another satellite broadcasting receiver, When the satellite broadcasting signal of any of the devices becomes lower than a predetermined level, the satellite broadcasting signal is transmitted to that satellite broadcasting receiver from another satellite broadcasting receiver that is receiving the satellite broadcasting signal at a level higher than the above level. Satellite broadcasting characterized in that the above-mentioned satellite broadcasting signal is transmitted via a line, and is transmitted to the above-mentioned dependent communal viewing device in place of the above-mentioned satellite broadcasting signal received by the satellite broadcasting receiving device whose level has been reduced. Joint reception method. (2) a plurality of satellite broadcast receiving devices, each of which is located in a different area, receives a satellite broadcast signal from the same broadcast satellite, and transmits the received satellite broadcast signal to a joint viewing device subordinate to each; and a transmission line connected between each of the satellite broadcasting receivers so that the satellite broadcasting reception signal received by each of the satellite broadcasting receivers can be transmitted to another satellite broadcasting receiver, is a receiving section that receives the satellite broadcasting signal; a determining means that generates a first determination signal when the satellite broadcasting signal is higher than a predetermined level; and a determining means that generates a second determination signal when the satellite broadcasting signal is smaller than a predetermined level; inputting the satellite broadcasting signal from the satellite broadcasting signal and the satellite broadcasting signal from the other satellite broadcasting receiving device supplied via the transmission line,
transmitting the satellite broadcasting signal of the receiving unit to the joint viewing device according to the first selection signal, and transmitting the satellite broadcasting signal to another satellite broadcasting receiving device other than the one to which the satellite broadcasting signal has been inputted, via the transmission line; In response to the second selection signal, the satellite broadcasting signal from the other satellite broadcasting receiver is transmitted to the joint viewing device, and the transmission line is connected to the other satellite broadcasting receiver other than the one into which the satellite broadcasting signal has been input. and a distribution control means for transmitting the data through the satellite broadcast receiving apparatus, and the satellite broadcast receiving apparatus that has generated the first judgment signal is provided with a first selection signal. A satellite broadcasting joint reception apparatus comprising a control means for supplying a second selection signal to the satellite broadcasting reception apparatus that has generated the second determination signal.