JPH01255389A - Community receiving system for television transmitting audio visual signal for satellite broadcasting or the like - Google Patents

Abstract

PURPOSE:To view the desired audio and visual with a television in each room by utilizing a transmission line exclusive-use for the television, sending a command signal from a remote controller, and on the other hand, transmitting the sound and video signals of a television radio wave and AV equipment. CONSTITUTION:When desired AV equipments 5-7 are selected by operating a remote controller 1, the signal is received by a remote sensor 2 in the vicinity of the television, modulated to an AM or FM signal, sent to a transmission line W wired to each television, and introduced through an adaptor 3 to a command transmitting part 4. By the command transmitting part 4, a modulated wave is demodulated, the same signal as the command signal transmitted from the remote controller 1 is transmitted, and when the signal is received at the AV equipments 5-7 sides to be arranged indoors, only the selected equipment is turned on, an output signal is introduced to an adapter 4, it is modulated, and it is outputted through the transmission line W to the television side. Thus, only the audio and visual from the AV equipments 5-7 to be select-operated by the remote controller can be viewed on the television.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a television public listening system, and in particular uses transmission lines dedicated to the television wired indoors to transmit AV signals from satellite broadcasts and various audio equipment. The present invention relates to a television communal listening system that transmits audiovisual signals such as satellite broadcasting that allows AV to be selectively viewed on a television in each room.

(Prior art) In recent years, the penetration rate of televisions in ordinary households has been remarkable, with each household equipped with 2.3 televisions, and one in each living room.
It is becoming less and less rare to see a stand installed. Furthermore, interest in receiving new media such as satellite broadcasts and teletext broadcasts is increasing, and an increasing number of households are installing BS antennas and BS tuners to watch so-called BS broadcasts. Furthermore, on the other hand, interest in audiovisuals has increased from simple audio sets such as stereo, and satellite broadcasting and VT
There is a trend toward the introduction of AV child televisions that can view R and CDs. Therefore, the above-mentioned AV was installed on the TV installed in each room.
However, in order to receive satellite broadcasts, it is first necessary to frequency-convert the satellite broadcast waves received by a BS antenna with a BS converter, and then demodulate them into video and audio signals with a BS tuner. .

In a conventional television, the demodulated signal is
Re-modulated to UHF13ch of M, UHF-VHF-B
A common example is to input the signal from the S mixer to the RF terminal of each television via a distributor and transmission line. In addition, in the case of AV child TVs, the demodulated signal is introduced from the distributor to the video input terminal and audio input terminal of each TV via a transmission line. It is possible to listen to the broadcast together.

(Problem to be solved by the invention) However, since the use of audio sets, VTRs, CDs, etc. differs depending on the manufacturer and model, signal processing is difficult, and it is difficult to place one set of AV equipment in one room. However, it was impossible to view the audio and video signals on the TV in each room by transmitting the audio and video signals using the existing transmission lines installed in the room. Therefore, the above-mentioned audio equipment can only be used in one room as an audio room, and if you want to listen to music in another room, you must prepare a separate set, which increases installation costs and creates problems in the installation space. Ta. Therefore, if it is desired to view audiovisuals in each room, a simple method would be to wire a dedicated AV transmission line separately from the television transmission line. However, when new wiring work is carried out in an existing house, the wiring becomes exposed, detracting from the beauty of the house, and the cost of the work cannot be ignored. In addition, for newly built housing,
Although wiring work can be done in advance, problems remain, such as requiring multiple wires to each room, making it uneconomical and complicating the connection to the television.

This invention was made in view of the above-mentioned problem 1, and it makes it possible to watch audiovisuals such as satellite broadcasts, VTRs, and CDs by remote control operation on each TV set in multiple rooms, and also provides AV equipment for this purpose. Equipped with only one set, solving problems of installation space and equipment costs,
The purpose of the present invention is to provide a television public viewing system that can utilize existing transmission lines.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides UHF-
In a television communal listening system in which a transmission line for transmitting VHF terrestrial broadcast waves is wired, one of the rooms is equipped with various audiovisual devices such as a satellite tuner and sound equipment.
V) A remote sensor that places the equipment, transmits a command signal to drive the AV equipment, and equips each television with a remote control that controls the television, receives the command signal, and modulates it to the AM or FM band;
connected to the transmission line of each television and placed near the television;
A command transmitter that demodulates the modulated wave carried through the transmission line of each television and transmits a signal equivalent to a command signal transmitted from the remote control is installed facing the AV equipment side, and transmits the command. The unit is equipped with an adapter that transmits modulated waves from each remote sensor and transmits the terrestrial broadcast waves and the audio/visual signals of the AV equipment to each television.
It is characterized by a configuration in which the desired AV can be viewed on the TV in each room by selecting an audio/visual source such as VHF, satellite broadcasting, or various AV equipment.

(Function) When a desired AV device is selected by operating the remote control, a command signal is transmitted from the remote control. When this signal is received by a remote sensor near the TV, the
It is modulated into an M signal. This modulated wave is sent as a carrier wave to a transmission line wired to each television, and introduced into the command transmitter via an adapter. In this command transmitter,
The modulated wave is demodulated and the same signal as the command signal transmitted from the remote controller is transmitted. When this signal is received by the AV equipment installed in the room, only the equipment selected by the remote control is turned on and outputs an audio video signal.

This output signal is introduced into the adapter and modulated, and then output to the television via the transmission line. As a result, only the audiovisuals from the AV equipment selected using the remote control can be viewed on the television.

(Example) Embodiments of the present invention will be described below based on the drawings.

The television public listening system according to this embodiment is shown in FIGS. 1 to 3, and consists of 14 conventional televisions (hereinafter referred to as It is applied to TVs (abbreviated as "television") and uses transmission lines W exclusively for TVs such as coaxial cables wired to each TV.As shown in Figure 3, the main parts are each of the four parts A-D. A handy wireless remote control (hereinafter referred to as the remote control) installed on the TV, a remote sensor 2 installed near the TV facing the remote control, and AV equipment such as a satellite broadcast tuner 5 in the room A. It is configured to include an adapter 3, a command transmitter 4, etc., which are arranged together. Also,
As an AV device, a satellite broadcast tuner (BS tuner)
5, a video tape recorder (VTR) 6, a compact disc (CD) 7, etc., and as an antenna for receiving television radio waves, UHF-VHF and B
The structure is such that S (satellite broadcasting) antennas 8, 9, 10, etc. are installed outdoors. Note that the various AV devices 5 to 7 are models that are operated by a remote controller 1, and as shown in FIG. a are arranged so as to face in the same direction. Also, the UHF-VHF
The antenna 9.10 is powered by B via a UV mixer 12.
While introducing the S-U-V mixer 13, the BS antenna 8
The received radio waves are sent to the BS via the BS converter 11.
- The UV mixer 13 is operated manually. And this BS
- The output of the UV mixer 13 is manually supplied to the BS-U-V splitter 14 placed indoors via a coaxial cable, and the UV
and branching into the BS band. Furthermore, UHF-VHF
While the band is manually input to the adapter 3, the BS band is introduced to the BS tuner 5. The adapter 3 is additionally equipped with one end of the main line of the transmission line W wired indoors to each room A-D, and the terminal of this transmission line is connected to the wall terminal ( antenna terminal) 16
are connected to each. Each antenna terminal and the RF terminal of the television are connected by lead wires.

The remote control 1 controls the indoor TV and sends command signals to the AV devices 5 to 7,
As shown in FIG. 4, in addition to the conventionally known control keys 1a for power switch, channel, volume adjustment, image quality adjustment, etc.,
A command key 1b for selecting and operating 7 is provided.

As shown in FIG. 2, a transmitting circuit 1c is connected to this command key 1b, and when the command key 1b is pressed, the transmitting circuit IC drives any one of the AV devices 5 to 7. A command signal P is connected thereto, and the pulse signal is photoelectrically converted into infrared rays and output as an optical signal.

The remote sensor 2 modulates the command signal P and sends it as a carrier wave to the transmission line W. The remote sensor 2 includes a photoreceiver 2a, a bandpass filter (BDF) 2b, an amplifier 2C1, a modulation circuit 2d, and a transmitter circuit 2e. The output side is connected to the terminal 16, and is attached to the side of each TV.The light receiver 2a is a photo sensor that photoelectrically converts the optical signal from the remote control 1 and sends it to the BDF 2d. cuts the band other than the command signal and outputs it to the amplifier 2C.When the signal is amplified by this amplifier, it is sent to the modulation circuit 2d.

This modulation circuit modulates the pulse signal into the FM band and outputs it to the transmission circuit 2e. This transmission circuit sends the modulated wave M to the transmission line W as a carrier wave. This allows the remote sensor 2 to quickly output the command signal to the main transmission line W.

Since the adapter 3 bidirectionally transmits audio/video signals and command signals, it is equipped with a bidirectional mixer 3a, a UHF converter 3d, and a signal processing device (not shown).
The AV devices 5 to 9, the command transmitter 4 and the B5-U
A V duplexer 14 is connected via a connection terminal.

The bidirectional mixer 3a is a directional coupler, and is a hybrid type with good reverse coupling properties suitable for transmission with a large number of adjacent channels.
While the terrestrial broadcast wave of the BS-UV duplexer 14 and the output signal of the UHF converter 3b are introduced, a modulated wave m sent from the remote sensor 2 is output to the adapter 4 side, which will be described later. In this example, the downlink signals from the UHF converter 3b and the BS-UV splitter 14 are set as the upper band, while the uplink signals from the remote sensor 2 are set as the lower band, and the command signal P is sent to the AV devices 5 to 7. It is also possible to transmit audio and video signals to each television. The UHF converter 3b is a conventionally well-known frequency converter, and has a BSS team 5 and a VTR at its input terminal.
6 and CD7, etc., and a bidirectional mixer 3a is connected to the output side. As a result, various AV
The audio and video signals of the equipment are converted into UHF (FM) band and sent to the TV side via the bidirectional mixer 3a.

The command transmitter 4 outputs the same signal as the command signal P transmitted from the remote controller, and is connected to the demodulator circuit 4as.
It includes a transmitting circuit 4b and a light emitting section 4C. The demodulation circuit 4a is connected to the bidirectional mixer, demodulates the modulated wave m sent from the transmission line, and outputs it to the transmission circuit 4b. This transmitting circuit is configured to transmit a demodulated pulsed command optical signal to the AV devices 5 and 6.

Next, a television viewing operation using the communal listening system of this embodiment will be explained.

To explain how to receive satellite broadcasting, first, point the remote control 1 toward the remote sensor 2 placed near the TV in your room, and press the command key 1b.
Press. At this time, as shown in FIG. 2, a pulsed command signal for driving the BS tuner 5 is transmitted as an optical signal from the light emitting section 1d of the remote controller. When this optical signal is received by the light receiving section 2a of the remote sensor 2, it is photoelectrically converted and then modulated into an FM signal. When this modulated wave m is sent to the transmission line W as a carrier wave indicating the command signal P, it is introduced into the command transmitter 4 via the bidirectional mixer 3a of the adapter 3. Demodulation circuit 4 of this command transmitter
After the modulated wave m is demodulated by a, an optical signal equal to the original command signal transmitted from the remote controller 1 is sent to the light emitting unit 4C.
Sent from. When this optical signal is transmitted by the light receiving section 5a of the BS tuner 5, which is one of the AV devices 5 to 7 placed in the room, the BS tuner 5 turns on and the B
Satellite broadcast waves received by the S antenna 8 are output. This satellite broadcast wave is sent to the transmission line W via the UHF converter 3BS and bidirectional mixer 3a of the adapter 3, and is received by the television set in the switched-on state, and the satellite is selectively operated by the remote control 1. Only broadcasts will be available for viewing. Thereby, satellite broadcasting selected by operating the remote controller 1 can be viewed simultaneously on one or more televisions. On the other hand, even if satellite broadcasting is not being received on other TVs, it is of course possible to view UHF or VHF broadcasting, and it is possible to view television broadcasting according to one's preference in each room. Although this selection operation was explained for the reception of satellite broadcasting,
Even when driving an AV device such as 6 or CD7, the reception operation and signal processing are basically the same. In addition, the command signal P transmitted from the remote controller 1 is modulated and sent to the transmission line W, and then returned to the original command signal P by the command transmitter 4, and sent to each AVV unit 5 to 7 as an optical signal. Therefore, even if the specifications of this AV equipment differ depending on the manufacturer or model, it can be turned on and off regardless of the model as long as it is equipped with a light receiving section.

Therefore, troubles in signal processing are avoided, and each device can operate accurately.

Note that the TVs applied to this communal listening system are not limited to conventional types, but include A-TVs equipped with audio sets.
A V-type child television may be placed in each room, or an AV-type child television and a conventional television may be installed in each room. That is, in this case, a BS down converter is connected to the BS converter 11 to convert the satellite broadcast waves into terrestrial broadcast waves in the UHF band, and then the signals are manually input to the BS-UV mixer 14 through a bandpass filter. Then, after separating the satellite broadcast wave and the terrestrial broadcast wave in the next stage BS-U-V splitter 14, a BS up converter is provided to restore the satellite broadcast wave to its original state.
Introduced to S Chi Nina 5. Furthermore, the output of the BS tuner is configured to be sent to the transmission line W wired indoors as described above. As a result, when AV type child televisions are placed in each room A to D, all television radio waves can be received by loading a known signal processing compatible device on the connection end with the transmission line W. On the other hand, even in the case of a conventional television, if a compatible device for signal processing is provided at the connection end, desired television radio waves can be received.

Incidentally, in the above embodiment, a case has been described in which the output signals of the AVV devices 5 to 7, which are selectively operated using the remote control, can be viewed simultaneously on each television set that is in the ON state. desired AV individually
It is also possible to receive output signals from the voltage generators 5-7. In this case, it is preferable to connect the UHF converter 3b provided in the adapter 3 in multiple stages corresponding to various AV devices, and to attach a known unidirectional coupler to the connection end of each television. As a result, when any one of the AV devices is selected using the remote control 1 in the user's room, the UHF converter responds to the command signal, and the modulated wave m is sent from the adapter 3 to the transmission line W. At this time, the cover provided at each terminal of the transmission line passes only the audio/visual signal selected with the remote control 1, and the output signal of the AV equipment is individually introduced to each TV, separate from the other TVs. Audiovisuals can be viewed.

(Effects of the Invention) As explained above, according to the present invention, command signals from a remote control can be sent by using transmission lines dedicated to televisions wired to a plurality of televisions, and audio signals from television radio waves and AV equipment can be sent. Since video signals are transmitted, desired audiovisuals can be viewed on the TV in each room by placing a satellite broadcast tuner, various audio devices, etc. in one set. Therefore, the AV equipment only needs to be installed in one room of the house, which solves the problem of installation space and eliminates the need for multiple sets of AV equipment. In addition, in existing houses, conventional indoor wiring can be used, so there is no need to install new transmission lines, which results in extremely low equipment costs, and it also has the effect of not damaging the aesthetics of the house. . Furthermore, it is easy to add various new media and audio sets, and with a simple remote control operation, you can watch what you like from a wide variety of information sources, greatly expanding your tastes. In addition, even if the specifications of AV equipment differ depending on manufacturer or model, there is no need to change signal processing equipment such as remote sensors, adapters, and command transmitters, so even if AV equipment is combined in a wide variety of ways, , which has the advantage of being able to be handled with conventional equipment.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention. FIG. 1 is a main configuration diagram of a television communal listening system that transmits audiovisual signals, FIG. 2 is a block diagram of the communal listening system, and FIG. 3 is a block diagram of the communal listening system. FIG. 4 is a plan view showing an example in which the communal listening system is applied to a house, and FIG. 4 is an explanatory diagram showing an example of a remote control key display board. 1...Remote control, 2...Remote sensor, 3...
Adapter, 4... Command transmitter, 5... BS tuner, W... Transmission line. Applicant: Seaclef Sound Co., Ltd.

Claims (1)

[Claims] (1) In a TV communal listening system in which transmission lines for transmitting UHF/VHF terrestrial broadcast waves are wired to at least two or more TVs placed in multiple rooms, a satellite broadcast tuner is installed in one of the rooms. Various audiovisual (AV) equipment such as audio equipment and audio equipment are arranged, and a command signal to drive the AV equipment is transmitted, and a remote control for controlling the TV is provided on each TV, and the TV receives the command signal and transmits a command signal to drive the AV equipment. A remote sensor that modulates in the FM band is connected to the transmission line of each television and placed near the television, and demodulates the modulated wave carried through the transmission line of each television, and demodulates the modulated wave transmitted from the remote control. A command transmitting section that transmits a signal equal to the command signal of the AV device is attached toward the AV equipment side, and a modulated wave from each remote sensor is sent to the command transmitting section, while transmitting a signal equal to the terrestrial broadcast wave and the AV equipment. Equipped with an adapter that transmits audio and video signals to each television, the user can select audio and video sources such as UHF, VHF, satellite broadcasting, or various AV equipment by operating the remote control, and view the desired AV on the TV in each room. 1. A television public listening system for transmitting audiovisual signals such as satellite broadcasting, characterized by the following configuration: