JP2005328302A - Broadcast signal transmission system, signal processing apparatus used for broadcast signal transmission system, signal distribution board, and broadcast outlet unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast signal transmission system capable of realizing the improvement of the workability and the reduction in the working execution cost without affecting the surrounding by decreasing the number of components and saving the space of the entire system and saving the number of wires. <P>SOLUTION: An information distribution board 11 and each of broadcast outlet units 22-1 to 22-4 are interconnected by multi-core optical cables 12-1 to 12-4, which are lighter and thinner than a conventional metal cable. Further, the information distribution board 11 converts a broadcast signal obtained by each of antennas 17 to 20 into an optical signal, which is transmitted through the multi-core optical cables 12-1 to 12-4, and the broadcast outlet units 22-1 to 22-4 convert the optical signal into an electric signal, which is output to a television receiver 27. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  This invention mainly receives a plurality of broadcast signals having different modes in a receiving unit such as an antenna in a small-scale house and a detached house, and arbitrarily selects from a plurality of broadcast signals received by the receiving unit. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast signal transmission system used in a broadcast reception system that reproduces and outputs a broadcast signal by a reproduction unit such as a television receiver, a signal processing device used in the broadcast signal transmission system, a signal distribution board, and a broadcast outlet device. .

  In recent years, small-scale houses and detached houses can receive various types of broadcasting services such as VHF broadcasting, UHF broadcasting, BS broadcasting, CS broadcasting, CS110 degree broadcasting, CATV broadcasting, and the like. In addition, broadband services using the Internet (IP network) can also be received.

  In this case, an information distribution board that concentrates a plurality of signal transmission paths in which a plurality of broadcast services are mixed in one place is used. This information distribution board is placed behind the ceiling or behind the wall in the house. From there, VHF / UHF combined coaxial cable, BS / CS combined coaxial cable, CATV coaxial cable are laid in each room. A broadcasting outlet corresponding to a connection device such as a tuner required in each room is attached to the terminal.

  The information distribution board includes an amplifier and a distributor, amplifies the input signal to a level at which a sufficient distribution signal can be obtained by the amplifier, distributes the amplified signal by the distributor, and outputs the amplified signal to each coaxial cable.

On the other hand, there is a wiring system (for example, Patent Document 1) as an example of the prior art. In this system, the number of coaxial cables is reduced by using a head end including a broadcast signal tuning section and a switching section.
Patent No. 3042336.

  By the way, if the coaxial cable is passed through a pipe having a diameter of 16 mm or 22 mm, which is generally used, the number is usually 1 or 2, and it is difficult to pass three coaxial cables at the time of construction in most pipes. For this reason, it is difficult to apply the existing piping in the case of existing piping equipment, and the construction cost becomes a factor in the case of new construction. Moreover, even when wiring without passing through the piping, if the number of coaxial cables increases, cost and workability at the time of laying deteriorate.

  Similarly, according to the JISC8305 standard, the size of the switch box in a single outlet is 56mm x 102mm x 35mm. Generally, it is difficult to put three or more coaxial cables. It must be increased. This not only leads to cost and workability deterioration, but also detracts from aesthetics.

  Even in the information distribution board, if the number of coaxial cables increases, the connecting portion becomes considerably large. Therefore, it is difficult to use a general size distribution board, and the information distribution board needs to be enlarged or added.

  In addition, as the number of coaxial cables increases, the probability that interference with other coaxial cables or information wirings that transmit electrical signals in the vicinity will increase. Furthermore, when a broadcasting outlet is added or when the transmission distance is extended, the voltage loss increases due to branching or an increase in the transmission distance. Therefore, it is necessary to add an amplifier to the information distribution board. This necessitates a change in the design of the internal configuration of the information distribution board, which greatly increases the cost.

  On the other hand, in Patent Document 1, a device such as a terminal controller is required to share a cable with other services. In addition, since an electric signal is used, there are problems such as generation of noise to the periphery and the influence of ambient noise.

  Accordingly, an object of the present invention is to reduce the number of parts and to realize space saving and wiring saving of the entire system, thereby realizing improvement in workability and reduction in construction cost. It is an object of the present invention to provide a broadcast signal transmission system that does not give a signal, a signal processing device used in the broadcast signal transmission system, a signal distribution board, and a broadcast outlet device.

In order to achieve the above object, the present invention is configured as follows.
The receiving unit receives a plurality of broadcast signals having different modes, and is used in a broadcast receiving system that reproduces and outputs a broadcast signal in an arbitrary mode from a plurality of broadcast signals received by the receiving unit, It has at least one input terminal and an output terminal that connects the optical transmission line, inputs a plurality of broadcast signals obtained by the receiving unit to the input terminal, converts the input signal into a transmission signal of the optical transmission line, and transmits the light The signal processing means for sending to the line and the optical transmission line terminal connected to the output terminal are connected to the reproduction unit, and the transmission signal of the optical transmission line is converted into the output signal to the reproduction unit and output. And a broadcasting outlet device. Note that at least one of existing SMF (single mode optical fiber), MMF (multimode optical fiber), and POF (plastic optical fiber) is used for the optical transmission line.

  According to this configuration, the existing optical fiber cord is lighter and thinner than a general metal cable, so that it is easy to perform a plurality of wirings, and even if the number of broadcast services to be received increases, the necessity for increasing the number of pipes is low. Also, the broadcast signal obtained by the receiving unit is converted into a transmission signal of the optical transmission path by the signal processing unit and transmitted, and the transmission signal from the optical transmission path is output to the reproduction unit by the broadcasting outlet device. Therefore, when the number of broadcast services to be received increases, it is only necessary to replace the already installed broadcast outlet device with a broadcast outlet device corresponding to the broadcast service. There is no need to modify the transmission line or the signal processing unit main body. Thereby, space saving and wiring saving of the whole system can be achieved, and improvement of workability and reduction of construction cost can be realized. Furthermore, even if an optical signal from another broadcast service is input to the signal processing unit, the optical signal can be provided to the reproduction unit through the optical transmission path.

The signal processing unit is a signal distribution board that has a plurality of output terminals, converts an input broadcast signal from an electric signal to an optical signal, and branches to a plurality of output terminals. The transmission signal is converted from an optical signal to an electrical signal and output to the reproduction unit.
According to this configuration, the broadcast signal, which is an electrical signal, is converted into an optical signal by the signal distribution board, branched to a plurality of output terminals and output, and the optical signal is converted into an electrical signal by the broadcasting outlet device and reproduced. It is not necessary to provide an amplifier necessary for signal branching on the signal distribution board, and it is possible to affect the surrounding electric field by being transmitted to the broadcasting outlet device by the optical signal. There is no interference.

When an optical signal including a plurality of broadcast signals is transmitted from the optical transmission line, the broadcast outlet device selects a broadcast signal in an arbitrary mode from the plurality of broadcast signals in response to a request from the reproduction unit, It is characterized by being output to.
According to this configuration, since the broadcast outlet device is provided with a broadcast signal selection function, there is no need to provide a broadcast signal selection unit on the playback unit side, and an optimal broadcast signal according to a request from the playback unit. Can be provided to the playback unit.

  The broadcasting outlet device has a function of sending an arbitrary optical signal to a signal processing unit via an optical transmission line, and the signal processing unit is input in accordance with a signal sent from the broadcasting outlet device. A broadcast signal in an arbitrary mode is selected from the broadcast signals, converted into a transmission signal on an optical transmission path, and sent to a broadcast outlet device.

  According to this configuration, the signal processing unit has a function of selecting a broadcast signal in an arbitrary mode from a plurality of broadcast signals and transmitting the broadcast signal in response to a request from the reproduction unit. The processing load on the outlet device can be reduced, and thus an optimal broadcast signal can be provided to the playback unit in response to a request from the playback unit.

  When the playback unit has a power source, the broadcast outlet device receives power from the playback unit. The signal processing unit includes power supply means for supplying power to the broadcast outlet device. Furthermore, the power supply part which supplies the same power supply with respect to a receiving part and the said broadcast outlet apparatus is further provided, It is characterized by the above-mentioned.

  According to this configuration, not only the broadcasting outlet device is connected to the terminal of the optical transmission path, but also the power source of the broadcasting outlet device is shared with the power source of the reproduction unit, the signal processing unit, or the receiving unit, It is possible to reduce the size of the broadcast outlet device and to reduce the power consumption of the entire system.

  The optical transmission line uses an existing multi-core optical fiber cord as a transmission medium. The optical transmission line is characterized by transmitting a plurality of broadcast signals using at least one of a WDM (optical wavelength division multiplexing) technique and a TDM (time division multiplexing) technique.

  According to this configuration, since a plurality of broadcast signals can be simultaneously transmitted from the signal processing unit to the broadcast outlet device, the number of optical transmission paths connecting the signal processing unit and the broadcast outlet device is reduced. This can simplify the wiring structure of the entire system. Further, even when the optical transmission line is shared with a broadcast signal by another IP service, it can be transmitted to the broadcast outlet device without affecting each other.

  When used in a small or detached house, the broadcast outlet device is housed in a known switch box installed in a small or detached house, or installed near an outlet. And

  According to this configuration, the broadcast outlet device is housed in a home switch box or piping, and has an appearance suitable for home use, so that the product of the present invention can be introduced without greatly deteriorating the landscape of the house.

  As described above in detail, according to the present invention, it is possible to improve the workability and reduce the construction cost by reducing the number of parts and reducing the space and wiring of the entire system. It is possible to provide a broadcast signal transmission system that does not affect the surroundings, and a signal processing device, a signal distribution board, and a broadcast outlet device used in the broadcast signal transmission system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic configuration diagram showing a first embodiment of a broadcast signal transmission system according to the present invention.

  In FIG. 1, reference numeral 11 denotes an information distribution board. Here, in order to simplify the description, the number of input / output channels (systems) of the information distribution board 11 is assumed to be 4 channels.

  In the first embodiment, the mixer 12 is connected to the first input channel of the information distribution board 11, the mixer 13 is connected to the second input channel, and the mixer 14 is connected to the third input channel. A CATV protector 15 is connected to the fourth input channel.

  The mixer 12 superimposes the output of the mixer 16 and the BS / CS 110 ° broadcast signal received by the BS / CS 110 ° antenna 17. The mixer 16 superimposes the VHF broadcast signal received by the VHF antenna 18 and the UHF broadcast signal received by the UHF antenna 19.

  The mixer 13 superimposes the signal based on the V (vertical) wave and the signal based on the H (horizontal) wave of the CS broadcast signal received by the CS antenna 20. Similarly to the mixer 13, the mixer 14 also superimposes a signal based on the V (vertical) wave and a signal based on the H (horizontal) wave of the CS broadcast signal received by the CS antenna 20.

  The CATV protector 15 receives a CATV broadcast signal broadcast by a cable and supplies it to the information distribution board 11.

  In addition, the information distribution board 11 connects the multi-fiber cable 21-1 to the first output channel, the multi-fiber cable 21-2 to the second output channel, and the multi-fiber cable 21-3 to the third output channel. And a multi-core optical cable 21-4 is connected to the fourth output channel. Each of the multi-core optical cables 21-1 to 21-4 accommodates three SMFs (single mode optical fibers). Broadcast outlet devices 22-1 to 22-4 are connected to the terminals of the multi-core optical cables 21-1 to 21-4.

  In addition, the information distribution board 11 is installed behind the wall of a house, and the broadcast outlet devices 22-1 to 22-4 are arranged in each room.

Next, the internal configuration of the information distribution board 11 and each of the broadcast outlet devices 22-1 to 22-4 will be described. Since the broadcast outlet devices 22-1 to 22-4 have the same configuration, the broadcast outlet device 22-1 will be described as a representative.
The information distribution board 11 includes a CATV booster 111, an electrical / optical converter 112, and optical distributors 113-1 to 113-3. The CATV booster 111 amplifies the signal strength of the output of the mixer 14 or the output of the CATV protector 15. The electrical / optical converter 112 converts the output of the mixer 12, the output of the mixer 13, and the output of the CATV booster 111 into optical signals. The optical distributor 113-1 distributes the optical signal by the output of the mixer 12 converted by the electrical / optical converter 112 to the multi-core optical cables 21-1 to 21-4. The optical distributor 113-2 distributes the optical signal by the output of the mixer 13 converted by the electrical / optical converter 112 to the multi-core optical cables 21-1 to 21-4. The optical distributor 113-3 distributes the optical signal output from the CATV booster 111 converted by the electrical / optical converter 112 to the multi-fiber optical cables 21-1 to 21-4.

  The broadcast outlet device 22-1 includes an optical / electrical converter 221, and broadcast outlets 222-1 to 222-3. The duplexer 23 is connected to the broadcast outlet 222-1, the changeover switch 24 is connected to the broadcast outlet 222-2, and the duplexer 25 is connected to the broadcast outlet 222-3. .

  The optical / electrical converter 221 converts the optical signal transmitted by the multi-core optical cable 21-1 into an electrical signal and outputs it to the corresponding broadcasting outlets 222-1 to 222-3. For example, a CATV broadcast signal output from the broadcasting outlet 222-1 is supplied to the television receiver 27 and reproduced and displayed after an arbitrary channel is selected by the CATV home terminal 26.

  Further, for example, a CS broadcast signal output from the broadcast outlet 222-2 is supplied to the television receiver 27 and reproduced and displayed after an arbitrary channel is selected by the CS tuner 28 via the changeover switch 24. The The changeover switch 24 selectively derives the output of the duplexer 23 and the output of the broadcasting outlet 222-2 in accordance with a switching signal from the CS tuner 28.

  Further, the broadcast signal output from the broadcast outlet 222-3 is distributed to the VHF / UHF broadcast signal and the BS / CS110 ° broadcast signal by the branching filter 25 and supplied to the television receiver 27 for viewing by the viewer. According to the selection instruction, broadcast signals of VHF, UHF, BS, CS110 ° are selectively reproduced and displayed.

  By the way, the broadcast outlet devices 22-1 to 22-4 of the first embodiment are obtained by deleting the power supply unit from the general-purpose outlet device. That is, the power supply of the broadcast outlet devices 22-1 to 22-4 is shared by the power supply of the CATV home terminal 26 and the power supply of the CS tuner 28.

  The power sources of the antenna 17, the antenna 18, the antenna 19, and the CS antenna 20 are shared with the power source of the information distribution board 11.

Next, the operation in the above configuration will be described.
In small houses and detached houses, signal transmission systems shown in FIGS. 2 to 4 have been considered before. 2 to 4, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The system shown in FIG. 2 is a case where video signals transmitted to all rooms are only VHF broadcast, UHF broadcast, BS broadcast, and CS110 ° broadcast, and these signals are listened to by each of the broadcast outlets 31 to 34. This is a case where CS broadcasting and CATV broadcasting that do not listen to only the room are added.

  The system shown in FIG. 3 is a case where all the broadcasts in FIG. 2 are listened to, and the number of coaxial cables 46 is saved by superimposing broadcast signals on the coaxial cables 46 by the information distribution board 45.

  The system shown in FIG. 4 corresponds to the same broadcasting as the system shown in FIG. 3, but the satellite signal switchers 55-1 to 55-4 are provided in the information distribution board 54, thereby reducing the wiring of the coaxial cable 56. It is a plan to make it.

  By the way, in the system shown in FIG. 2, when the broadcasting outlets 31 to 34 are installed in four rooms, one coaxial cable per room and five cables are connected to the information distribution board 35. Also, only one room has three coaxial cables.

  In the system shown in FIG. 3, three coaxial cables are connected per room, and 16 cables are connected to the information distribution board 45. Furthermore, in the system shown in FIG. 4, three coaxial cables are connected per room, and 18 coaxial cables are connected to the information distribution board 54.

  For this reason, it is difficult to apply the existing piping in the case of existing piping equipment, and the construction cost becomes a factor in the case of new construction. Moreover, even when wiring without passing through the piping, if the number of coaxial cables increases, cost and workability at the time of laying deteriorate.

  Therefore, in the first embodiment, the information distribution board 11 and the broadcast outlet devices 22-1 to 22-4 in each room are connected by the multi-fiber cables 21-1 to 21-4. did.

  First, the information distribution board 11 is arranged on a suitable wall behind the house, and multi-core optical cables 21-1 to 21-4 are laid from there to each room. Broadcasting outlet devices 22-1 to 22-4 are attached.

  When VHS broadcast, UHF broadcast, BS broadcast, CS110 ° broadcast, CS broadcast, and CATV broadcast are shared in all rooms, broadcast signals are received by the antennas 17 to 20 and superimposed in the vicinity of the antennas. However, it is opticalized and distributed to the fiber following the broadcasting outlet devices 22-1 to 22-4. The distributed signal is converted into an electric signal by each of the broadcast outlet devices 22-1 to 22-4 and supplied to the television receiver 27. This can be realized by using an existing optical fiber and a photoelectric conversion element. In this example, as a first example of the power feeding method, power is directly supplied to devices that require power feeding in the information distribution board 11, and the converters of the satellite antennas 17 and 20 are connected to the converters from the information distribution board 11 via coaxial cables. Power is supplied, and power is supplied to the broadcast outlet devices 22-1 to 22-4 from the CS tuner 28 via a coaxial cable.

  In this example, when the multi-core fiber cords 21-1 to 21-4 are used, one cord is used for the broadcasting outlet, four coaxial cables are used for the information distribution board 11, and the cord 4 is used compared to the case of the coaxial cable using the metal cable. Since it is sufficient to connect the books, it is possible to save a lot of space in both cases. In addition, since the wiring from the information distribution board 11 to the broadcasting outlet devices 22-1 to 22-4 is reduced from 12 coaxial cables to 4 optical cords, it leads to a significant reduction in cost. In addition, the influence on the surrounding electric field is eliminated.

  As described above, in the first embodiment, a multi-fiber optical cable that is lighter and thinner than the general metal cable between the information distribution board 11 and each of the broadcast outlet devices 22-1 to 22-4. Since connection is made through 21-1 to 21-4, the necessity for increasing the number of pipes is low even if the number of broadcast services to be received increases.

  Also, broadcast signals obtained by the antennas 17 to 20 are converted into optical signals by the information distribution board 11 and transmitted through the multi-core optical cables 21-1 to 21-4, and the broadcast outlet devices 22-1 to 22 are transmitted. 4 is converted into an electrical signal and output to the television receiver 27, it is not necessary to provide the information distribution board 11 with an amplifier necessary for signal branching. Miniaturization and cost reduction can be achieved.

  Accordingly, it is possible to save space and wiring of the entire system, improve workability and reduce construction cost, and prevent interference from affecting the surrounding electric and magnetic fields.

  Further, when the number of broadcast services to be received increases, it is only necessary to replace the already installed broadcast outlet devices 22-1 to 22-4 with broadcast outlet devices corresponding to the broadcast service. There is no need to modify the -1 to 21-4 or the information distribution board 11 main body.

  In addition, according to the first embodiment, not only the broadcasting outlet devices 22-1 to 22-4 are connected to the terminals of the multi-core optical cables 21-1 to 21-4, but also the broadcasting outlet device 22-1. Since the power source of ˜22-4 is shared with the power source of the CATV home terminal 26 and the CS tuner 28, the broadcast outlet devices 22-1 to 22-4 themselves can be miniaturized and the entire system Can contribute to energy saving.

(Second Embodiment)
FIG. 5 is a schematic diagram showing a second embodiment of the broadcast signal transmission system according to the present invention. In FIG. 5, the same parts as those in FIG. Also, the broadcast outlet device 61-1 among the broadcast outlet devices 61-1 to 61-4 will be described as a representative.

  That is, in the second embodiment, the above-described duplexer 23 and changeover switch 24 are incorporated in the broadcast outlet device 61-1.

  The CATV home terminal 26 is connected to the broadcast outlet 222-1, the CS tuner 28 is connected to the broadcast outlet 222-2, and the duplexer 25 is connected to the broadcast outlet 222-3.

  For example, a CATV broadcast signal converted into an electric signal by the optical / electrical converter 221 is led out to the broadcasting outlet 222-1 by the branching filter 23. The CATV broadcast signal output from the broadcast outlet 222-1 is supplied to the television receiver 27 and reproduced and displayed after an arbitrary channel is selected by the CATV home terminal 26.

  Further, for example, a CS broadcast signal converted into an electric signal by the optical / electrical converter 221 is led to the broadcasting outlet 222-2 via the changeover switch 24. The CS broadcast signal output from the broadcasting outlet 222-2 is supplied to the television receiver 27 and reproduced and displayed after an arbitrary channel is selected by the CS tuner 28. The changeover switch 24 selectively derives the output of the duplexer 23 and the output of the optical / electrical converter 221 in accordance with a changeover signal from the CS tuner 28.

  Further, the broadcast signal derived from the optical / electrical converter 221 to the broadcast outlet 222-3 is distributed by the branching filter 25 into a VHF / UHF broadcast signal and a BS / CS 110 ° broadcast signal, and the television receiver 27. And broadcast signals of VHF, UHF, BS, and CS110 ° are selectively reproduced and displayed according to a viewer's selection instruction.

  As described above, in the second embodiment, since the duplexer 23 and the CS broadcast changeover switch 24 are incorporated in the broadcast outlet devices 61-1 to 61-4, CS broadcast is performed in each room. It is not necessary to provide the duplexer 23 and the changeover switch 24 for switching signals, and an optimal CS broadcast signal can be viewed on the television receiver 27 in accordance with the switching signal from the CS tuner 28. Thereby, the aesthetics in the room can be improved.

(Third embodiment)
FIG. 6 is a schematic diagram showing a third embodiment of the broadcast signal transmission system according to the present invention. In FIG. 6, the same parts as those in FIG. The broadcast outlet device 71-1 will be described as a representative of the broadcast outlet devices 71-1 to 71-4.

  That is, in the third embodiment, the changeover switch 24 is built in the broadcast outlet device 71-1.

  Also, the broadcasting outlet device 71-1 is provided with two broadcasting outlets 72-1 and 72-2. The duplexer 23 is connected to the broadcast outlet 72-1, and the duplexer 25 is connected to the broadcast outlet 72-2.

  For example, a CATV broadcast signal converted into an electrical signal by the optical / electrical converter 221 is led to the broadcasting outlet 72-1 through the changeover switch 34. Then, the CATV broadcast signal output from the broadcasting outlet 72-1 is led to the CATV home terminal 26 by the branching filter 23, and after an arbitrary channel is selected by the CATV home terminal 26, the television receiver 27. To be played and displayed.

  Further, for example, a CS broadcast signal converted into an electric signal by the optical / electrical converter 221 is led to the broadcasting outlet 72-1 through the changeover switch 24. The CS broadcast signal output from the broadcast outlet 72-1 is led to the CS tuner 28 by the duplexer 23, and an arbitrary channel is selected by the CS tuner 28 and then supplied to the television receiver 27. Is displayed.

  Further, the broadcast signal derived from the optical / electrical converter 221 to the broadcast outlet 222-3 is distributed by the branching filter 25 into a VHF / UHF broadcast signal and a BS / CS 110 ° broadcast signal, and the television receiver 27. And broadcast signals of VHF, UHF, BS, and CS110 ° are selectively reproduced and displayed according to a viewer's selection instruction.

  As described above, in the third embodiment, the CS broadcast changeover switch 24 is incorporated in the broadcast outlet devices 71-1 to 71-4, and the two broadcast outlets 72-1, 72-2 are provided. Therefore, as compared with the first and second embodiments, the wiring structure in the room can be simplified, thereby improving the aesthetics in the room.

(Fourth embodiment)
FIG. 7 is a schematic configuration diagram showing a fourth embodiment of the broadcast signal transmission system according to the present invention. In FIG. 7, the same parts as those of FIG.

  That is, in the fourth embodiment, instead of the multi-fiber cables 21-1 to 21-4, the broadcast outlet devices 71-1 to 71-4 include a multi-fiber cable 81- including an upstream signal fiber. 1 to 81-4 are connected.

  In addition to the optical distributors 113-1 to 113-3, the information distribution board 82 includes an optical collector 821 that collects request signals by upstream fibers from the broadcasting outlet devices 71-1 to 71-4. Is prepared. The light collector 821 outputs a request signal from each upstream fiber to the electrical / optical converter 822. The electrical / optical converter 822 has a function of selecting an arbitrary broadcast signal from a plurality of input broadcast signals in accordance with the request signal and sending it to the request source.

  For example, it is assumed that the user designates a channel related to the CS broadcast signal by the television receiver 27 or the remote controller of the television receiver 27. Then, the CS tuner 28 transmits a request signal to the broadcast outlet device 71-1. This request signal includes channel information of the CS broadcast desired to be acquired.

  The broadcast outlet device 71-1 transmits a request signal to the information distribution board 82 via the upstream fiber of the multi-core optical cable 81-1. On the other hand, when the information distribution board 82 receives the request signal from the electric / optical converter 822, the information distribution board 82 selects the CS broadcast signal of the corresponding channel from the plurality of input broadcast signals, and converts the CS broadcast signal to the optical distribution board 82. After being converted into a signal, it is transmitted to the requesting television receiver 27 via the optical splitter 113-2 and the downstream fiber of the multi-core optical cable 81-1.

  At this time, in the broadcast outlet device 71-1, the changeover switch 24 is switched so as to derive the CS broadcast signal to the outlet 72-1. In addition to the CS broadcast switching request, the request signal includes a CATV signal and a control signal between devices.

  As described above, in the fourth embodiment, the information distribution board 82 and the broadcasting outlet devices 71-1 to 71-4 are connected by the multi-core optical cables 81-1 to 81-4 including the upstream fiber. In addition, the electrical / optical converter 822 of the information distribution board 82 has a function of selecting a broadcast signal in an arbitrary mode from a plurality of broadcast signals and transmitting the broadcast signal according to a request from the reproduction unit. Therefore, it is possible to reduce the processing load of the broadcasting outlet devices 71-1 to 71-4, and thus, by installing inexpensive broadcasting outlet devices 71-1 to 71-4, it is optimal to meet the demand. Broadcast signals can be provided to the television receiver 27.

(Fifth embodiment)
FIG. 8 is a schematic configuration diagram showing a fifth embodiment of the broadcast signal transmission system according to the present invention. In FIG. 8, the same parts as those in FIG.

  That is, in the fifth embodiment, the information distribution board 91 and each broadcasting outlet device 92-1 to 92-4 are connected by optical cables 93-1 to 93-4 having a single optical fiber. I am doing so. The optical cables 93-1 to 93-4 transmit a plurality of optical signals using WDM (optical wavelength division multiplexing) technology.

  The information distribution board 91 includes a CATV booster 111, an electrical / optical converter 911, a multiplexer / demultiplexer 912, an optical distributor 913, and a power supply device 914. The electrical / optical converter 911 converts the output of the mixer 12, the output of the mixer 13, and the output of the CATV booster 111 into an optical signal, and outputs this optical signal to the multiplexer / demultiplexer 912. The multiplexer / demultiplexer 912 multiplexes optical signals of a plurality of systems (three systems in FIG. 8) into one optical signal by the WDM technique, and outputs the multiplexed optical signal to the optical distributor 913. The optical distributor 913 distributes the multiplexed optical signal to the optical cables 93-1 to 93-4.

  The broadcast outlet device 92-1 includes an optical / electrical converter 921, broadcast outlets 922-1 and 922-2, and a multiplexer / demultiplexer 923. The duplexer 23 is connected to the broadcast outlet 922-1, and the duplexer 25 is connected to the broadcast outlet 922-2.

  The multiplexer / demultiplexer 923 distributes the multiplexed optical signal transmitted by the optical cable 93-1 into three systems, and outputs it to the optical / electrical converter 921. The optical / electrical converter 921 converts an optical signal into an electrical signal and outputs it to the corresponding broadcasting outlets 922-1 and 922-2. The optical / electrical converter 921 is supplied with power from the power supply device 914 of the information distribution board 91.

  By the way, in the fifth embodiment, the electrical / optical converter 911 has a function of selecting an arbitrary broadcast signal from a plurality of input broadcast signals and transmitting the selected broadcast signal to the request source in accordance with the request signal. .

  For example, it is assumed that the user designates a channel related to the CS broadcast signal by the television receiver 27 or the remote controller of the television receiver 27. Then, the CS tuner 28 transmits a request signal to the broadcast outlet device 92-1. This request signal includes channel information of the CS broadcast desired to be acquired.

  The broadcast outlet device 92-1 transmits a request signal to the information distribution board 91 via the optical cable 93-1. On the other hand, when the information distribution board 91 receives the request signal by the electric / optical converter 911, the information distribution board 91 selects the CS broadcast signal of the corresponding channel from the plurality of input broadcast signals, and converts the CS broadcast signal to the optical distribution board 91. After conversion to a signal, the signal is transmitted to the requesting television receiver 27 via the multiplexer / demultiplexer 912, the optical distributor 913, and the optical cable 93-1.

  At this time, in the broadcast outlet device 92-1, the changeover switch 24 is switched so as to derive the CS broadcast signal to the broadcast outlet 922-1. In addition to the CS broadcast switching request, the request signal includes a CATV signal and a control signal between devices.

  As described above, in the fifth embodiment, the optical cables 93-1 to 93-4 that transmit the multiplexed optical signal are connected to the connection between the information distribution board 91 and the broadcasting outlet devices 92-1 to 92-4. Since a plurality of optical signals are transmitted at the same time, the number of optical fibers connecting the information distribution board 91 and the broadcast outlet devices 92-1 to 92-4 can be reduced. Thus, the wiring structure of the entire system can be simplified. Also, when the optical cables 93-1 to 93-4 are shared with broadcast signals from other IP services, they can be transmitted to the broadcast outlet devices 92-1 to 92-4 without affecting each other.

(Sixth embodiment)
The sixth embodiment of the present invention relates to a broadcast outlet device.
FIG. 9A is a perspective view of a broadcasting outlet device according to the sixth embodiment of the present invention, and FIG. 9B is a side view of the broadcasting outlet device.

  The broadcast outlet device is accommodated in a switch box main body 100 arranged on the back wall of a house. Broadcast outlets 101 to 103 for outputting broadcast signals or inputting upstream signals are arranged on the front face of the switch box main body 100. Further, the optical cable 104 is pulled out from the upper surface of the switch box main body 100 behind the wall.

The power source is shared by the power source in the switch box main body 100, supplied from a receiver (CS tuner or the like), or supplied from an information distribution board. At this time,
As described above, according to the sixth embodiment, the broadcast outlet device is housed in the home switch box main body 100, and thus has an appearance suitable for home use. It can be introduced without.

(Seventh embodiment)
The seventh embodiment of the present invention relates to a broadcast outlet device.
FIG. 10 is a perspective view of a broadcast outlet device according to the seventh embodiment of the present invention.

  In FIG. 10, reference numeral 200 in the figure denotes a broadcast outlet device main body, and broadcast outlets 201 to 203 for outputting broadcast signals or inputting upstream signals are arranged on the front surface. An optical cable 204 is drawn from the back surface of the broadcast outlet apparatus main body 200. This optical cable 204 is connected to the connector 301 of the switch box 300 provided on the wall of the house.

  As described above, in the seventh embodiment, since the broadcast outlet apparatus main body 200 and the switch box 300 are provided separately, a connector for connecting the optical cable 220 is arranged for any type of switch box. Can be easily connected. Further, it is only necessary to connect the power outlet 205 of the broadcast outlet apparatus main body 200 to a power connector already provided in the house, and thereby sufficient power can be supplied to the broadcast outlet apparatus main body 200. In particular, this is very effective in an environment where it is difficult to obtain a sufficient power supply from an information distribution board or CS tuner.

(Eighth embodiment)
The eighth embodiment of the present invention relates to an information distribution board.

  FIG. 11 is a perspective view of an information distribution board according to the eighth embodiment of the present invention.

  In FIG. 11, reference numeral 400 denotes an information distribution board body, in which a CATV booster 401, an optical signal generator 402, and optical distributors 403-1 to 403-3 are arranged, and each cable is drawn from the upper surface. It becomes the composition.

  According to the eighth embodiment, the information distribution board main body 400 can be reduced in size, and a structure in which a plurality of cables are drawn from the upper surface of the information distribution board main body 400 can be adopted. 400 can be installed in any place behind the wall. In addition, if there is enough space in the information distribution board main body 400, it is possible to accommodate other devices.

(Other embodiments)
In addition, this invention is not limited to the structure of said each embodiment. For example, in the first to fourth embodiments, examples in which a multi-core optical cable containing SMF (single mode optical fiber) is used have been described. However, the present invention is not limited to this, and a multi-core optical cable containing MMF (multimode optical fiber) or POF (plastic optical fiber) may be used.

  In the fifth embodiment, the example in which a plurality of optical signals are multiplexed using the WDM technique has been described. However, the present invention is not limited to this, and a plurality of optical signals may be multiplexed using a TDM (time division multiplexing) technique.

  In the first to fifth embodiments, the example in which the broadcast signal input using the information distribution board is converted into an optical signal and distributed to each room has been described. Even a signal processing apparatus that transmits a broadcast signal through an optical fiber can be implemented. In this case, for example, an optical signal from another broadcasting service can be input from the outside and provided to the television receiver through an optical cable.

  Moreover, although each said embodiment demonstrated the example applied to a small-scale house or a detached house, it can apply also in the company etc. which have a some branch, a sales office, etc., for example.

  In addition, the system configuration, information distribution board configuration, broadcast outlet device configuration, broadcast signal type, optical cable type, optical signal transmission / reception procedure, and the like can be variously modified without departing from the scope of the present invention. Can be implemented.

1 is a schematic configuration diagram showing a first embodiment of a broadcast signal transmission system according to the present invention. The schematic block diagram which shows an example of the signal transmission system considered conventionally. The schematic block diagram which shows another example of the signal transmission system considered conventionally. The schematic block diagram which shows another example of the signal transmission system considered conventionally. The schematic block diagram which shows 2nd Embodiment of the broadcast signal transmission system which concerns on this invention. The schematic block diagram which shows 3rd Embodiment of the broadcast signal transmission system which concerns on this invention. The schematic block diagram which shows 4th Embodiment of the broadcast signal transmission system which concerns on this invention. The schematic block diagram which shows 5th Embodiment of the broadcast signal transmission system which concerns on this invention. The perspective view of the outlet device for broadcasting concerning the 6th Embodiment of this invention. The perspective view of the outlet device for broadcasting concerning the 7th Embodiment of this invention. The perspective view of the information distribution board concerning 8th Embodiment of this invention.

Explanation of symbols

  11, 35, 45 ... information distribution board, 12, 13, 14 ... mixer, 15 ... CATV protector, 16 ... mixer, 17-20 ... antenna, 21 ... multi-core optical cable, 22 ... broadcast outlet device, DESCRIPTION OF SYMBOLS 23 ... Splitter, 24 ... Changeover switch, 25 ... Splitter, 26 ... CATV home terminal, 27 ... Television receiver, 28 ... CS tuner, 31-34 ... Outlet for broadcasting, 34 ... Changeover switch, 46 ... Coaxial cable, 54 ... Information distribution board, 55 ... Satellite signal switch, 56 ... Coaxial cable, 61, 71-1 to 71-4 ... Broadcast outlet device, 72-1 to 72-4 ... Broadcast outlet, 81 ... multi-core optical cable, 82, 91 ... information distribution board, 92-1 to 92-4 ... broadcast outlet device, 93-1 to 93-4 ... optical cable, 100 ... switch box body, 11 ... CATV booster, 101 to 103 ... outlet for broadcasting, 112 ... electrical / optical converter, 113-1 to 113-3 ... optical distributor, 120 ... optical cable, 200 ... main body of outlet device for broadcasting, 201 to 203 ... for broadcasting Outlet, 204 ... Optical cable, 221 ... Optical / electrical converter, 222-1 to 222-4 ... Broadcasting outlet, 205 ... Connection outlet, 300 ... Switch box, 301 ... Connector, 400 ... Information distribution board body, 401 ... CATV booster, 402 ... optical signal generator, 403-1 to 403-3 ... optical distributor, 821 ... optical collector, 822 ... optical converter, 911 ... optical converter, 912 ... multiplexer / demultiplexer, 913 ... optical Distributor, 914 ... power supply, 921 ... optical / electrical converter, 922-1 to 922-4 ... broadcast outlet, 923 ... multiplexer / demultiplexer.

Claims (17)

The receiving unit receives a plurality of broadcast signals having different modes, and is used in a broadcast receiving system that reproduces and outputs a broadcast signal in an arbitrary mode from a plurality of broadcast signals received by the receiving unit,
Having at least one input terminal and an output terminal for connecting an optical transmission line, inputting a plurality of broadcast signals obtained by the receiving unit to the input terminal, and converting the input signal into a transmission signal of the optical transmission line; A signal processing unit for sending to the optical transmission line;
A broadcast outlet device provided at a terminal of an optical transmission line connected to the output terminal and capable of connecting the reproducing unit, and converting a transmission signal of the optical transmission line into an output signal to the reproducing unit and outputting the signal. A broadcast signal transmission system comprising: The signal processing unit is a signal distribution board that includes a plurality of the output terminals, converts an input broadcast signal from an electric signal to an optical signal, and branches to the plurality of output terminals. The broadcast signal transmission system according to 1. The broadcast signal transmission system according to claim 1, wherein the broadcast outlet device converts a transmission signal of the optical transmission path from an optical signal to an electrical signal and outputs the electrical signal to the reproduction unit. When an optical signal including a plurality of broadcast signals is transmitted from the optical transmission path,
4. The broadcast signal according to claim 3, wherein the broadcast outlet device selects an arbitrary broadcast signal from the plurality of broadcast signals in response to a request from the reproduction unit and outputs the selected broadcast signal to the reproduction unit. Transmission system. 2. The broadcast signal transmission system according to claim 1, wherein the broadcast outlet device has a function of sending an arbitrary optical signal to the signal processing means via the optical transmission line. The signal processing unit selects an arbitrary broadcast signal from the plurality of input broadcast signals according to a signal transmitted from the broadcast outlet device, and converts the selected broadcast signal into a transmission signal of the optical transmission path. 6. The broadcast signal transmission system according to claim 5, wherein the broadcast signal transmission system has a function of sending to the broadcast outlet device. When the playback unit has a power source necessary for operation,
The broadcast signal transmission system according to claim 1, wherein the broadcast outlet device receives power from the reproduction unit. 2. The broadcast signal transmission system according to claim 1, wherein the signal processing unit includes power supply means for supplying power necessary for operation to the broadcast outlet device. The power supply part which is provided in common with respect to the said receiving part and the said broadcast outlet apparatus, and supplies the power supply required for operation | movement with respect to each of these said receiving part and the said broadcast outlet apparatus is further provided. The broadcast signal transmission system according to 1. The broadcast according to claim 1, wherein at least one of existing SMF (single mode optical fiber), MMF (multimode optical fiber), and POF (plastic optical fiber) is used for the optical transmission line. Signal transmission system. The broadcast signal transmission system according to claim 1, wherein the signal distribution board branches an input signal to each output terminal using an existing photocoupler. The broadcast signal transmission system according to claim 1, wherein the optical transmission line uses an existing multi-core optical fiber cord as a transmission medium. 2. The broadcast signal transmission system according to claim 1, wherein the optical transmission path transmits a plurality of broadcast signals using at least one of a WDM (optical wavelength division multiplexing) technique and a TDM (time division multiplexing) technique. When used in a small house or a detached house, the broadcasting outlet device is housed in a known switch box installed in the small house or a detached house, or installed near an outlet. The broadcast signal transmission system according to claim 1. A signal processing apparatus used in the broadcast signal transmission system according to claim 1,
At least one input terminal to which a plurality of broadcast signals received by the receiving unit of the broadcast signal transmission system are input;
An output terminal for connecting an optical transmission line;
A signal processing apparatus comprising: a signal conversion unit that converts a broadcast signal input to the input terminal into a transmission signal of the optical transmission line and sends the transmission signal to the optical transmission line. A signal distribution board used in the broadcast signal transmission system according to claim 2,
At least one input terminal to which a plurality of broadcast signals received by the receiving unit of the broadcast signal transmission system are input;
A plurality of output terminals each connecting an optical transmission line;
An electrical / optical conversion means for converting a broadcast signal input to the input terminal from an electrical signal to an optical signal;
A signal distribution board comprising signal distribution means for distributing the optical signal converted by the electrical / optical conversion means to a plurality of output terminals. A broadcast outlet device used in the broadcast signal transmission system according to claim 1,
Input means for inputting a transmission signal of a connected optical transmission path;
Connection means for connecting a playback unit for playing back and outputting a broadcast signal in an arbitrary mode;
A broadcasting outlet device comprising: a signal converting means for converting a transmission signal of the optical transmission path into an output signal to the reproducing unit and outputting the signal.

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