KR100555349B1 - Amplifying and Allotting System for Use in Wire Broadcasting - Google Patents

Abstract

The present invention relates to an amplifying and distributing device for wired broadcasting, and in particular, a first choke coil that delivers only the voltage from the original signal and the voltage transmitted through the original line to the next amplifying and distributing device; A signal branch unit for separating the broadcast signal from the voltage and broadcast signal transmitted through the original line; A first deplexer for separating high-band video signals from low-band data from the broadcast signal; First and second amplifiers for amplifying image and data signals to a predetermined level; A second diplexer that separates high-band video signals and low-band data from broadcast signals transmitted from subscribers; A low pass filter that removes various noise signals included in the input broadcast signal and delivers only a pure broadcast signal; A matcher and a broadcast signal divider that mutually matches the broadcast signal received through the low-pass filter with the antenna impedance of the subscriber's TV receiver and distributes it through several taps; A second choke coil that extracts only the voltage from the voltage and broadcast signal transmitted through the original line; Composed of a switching mode power supply provided to each part by rectifying the AC voltage to a constant DC voltage, it is possible to prevent deterioration of service quality and signal level fluctuations, as well as reduce labor and installation costs due to the installation of amplifiers. In addition, by eliminating the use of a pair cable, it is possible to significantly reduce installation and labor costs.

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Description

Amplifying and Allotting System for Use in Wire Broadcasting             

1 is a block diagram of a general cable broadcasting system.

Figure 2 is a block diagram of a conventional branching device for cable broadcasting subscribers.

Figure 3 is an exemplary view showing a form of branching the wired broadcast signal to each conventional subscriber generation.

4 is a block diagram of the device of the present invention.

Figure 5 is an exemplary installation state of the device of the present invention.

※Explanation of symbols for the main parts of the drawing※

16: Circle track

20: signal branch

21,23: First and second deplexers

22,24: first and second amplifier

25: low pass filter

26: Impedance Matcher and Broadcast Signal Splitter

27: switching mode power supply

28,29: first and second choke coils

The present invention relates to an amplification distribution device for wired broadcasting, and more specifically, an amplification distribution device composed of a signal branch, a diplexer, an amplifier, a low-pass filter, an impedance matcher and a broadcast signal divider, and a switching mode power supply. It is installed by replacing the connector connection part of the existing branch machine on the top of the screen so that the device itself is driven by the voltage transmitted along with various video signals and data from a central broadcasting center such as satellite broadcasting and cable TV or a general cable broadcasting company. It was invented so that it could be distributed to each subscriber in good quality without loss through the existing coaxial cable.

In general, the line branching device 17 for wired broadcasting subscribers, as shown in FIG. 1, modulates 11, signal processor 12, modem 13 and various video signals provided by satellite broadcasting and cable TV or general cable broadcasting companies. When transmitting from the central broadcasting center 10 equipped with a personal computer 14 and a combine 15 to each subscriber TV receiver, it is installed in the middle of the original line 16 and is installed in the home of each household or in each office in the building. It plays a role of diverging to the back.

In addition, a conventional cable broadcasting subscriber line branching device is provided with several (usually between 2 and 16) subscriber cable connecting tabs (T1-Tn) outside one case, as shown in FIG. When the video signal including the voltage is transmitted from the central broadcasting center, it separates the broadcast signal from the power supply voltage, and at the same time transmits the received signal to the continuous line, and for subscribers connected through the cable and tap. It is composed of several impedance matchers 33 and 34 that mutually match the antenna impedance of the TV receiver.

This subscriber line branching device is installed on the original line on the distribution pole installed around the subscriber's building, and is connected to the number of subscribers corresponding to the number of taps installed on each line branching device, and is connected via cables.

However, since the number of taps for cable connection installed in the subscriber line branching device is limited, the number of subscribers increases, and when the number of taps is insufficient due to the increase in the number of subscribers, another subscriber line branching device is installed again on the original line of the distribution line. It must be connected to each subscriber through a cable.

Accordingly, in the case of a densely populated area (for example, multi-family/separate houses, medium/small buildings, etc.), as shown in FIG. 3, a number of subscriber line branching devices may be installed on one distribution line, and the number of each subscriber line branching device may be installed. You have to connect the cable for connecting the cables and the incoming cable separately for each furniture in each building.                         

In this way, if the operator installs another subscriber line branch device at the rear end of the TEP output terminal of the transmission line of the subscriber line branch device to secure the terminal, and then installs the incoming line cable for each subscription household, the quality of service deteriorates due to signal loss and poor connection. Of course, there is a problem in that the aesthetics of the city is hindered by overlapping the number of incoming cables corresponding to the number of households joined between one distribution pole and the building.

In addition, if additional subscriber line branching devices are installed to secure the tap, or cables that are coaxial lines are distributed, insertion loss is generated by 3-1.6dB for each device and line distribution loss is generated by about 4.9dB, causing signal level fluctuations in the transmission network. And there is a problem that a lot of quality defects occur.

In addition, until now, most subscribers have installed 1-2 subscriber line splitters per cable inspector at the beginning of the project to implement the cable broadcasting relay facility. The shortage phenomenon continues to occur.

Therefore, the applicant can separate the voltage and broadcast signal transmitted through the original line and transmit it to the furniture-dense amplification divider through a pair cable when the tap of the existing line branch device installed in a specific distribution pole is insufficient. At the same time, the wired broadcasting line branching device to the dense type amplification distribution device was filed as Domestic Utility Model Registration No. 20-2004-0011681, and at the same time, it was equipped with several output tabs and installed the "household dense amplification distribution device installed in each household in Korea. Utility Model Registration Application No. 20-2004-0011680", due to the difficulty of management due to the complexity of the incoming and outgoing facilities due to the number of cables connected to each subscriber from one subscriber line branching device and the increase in installation costs and increase in subscribers A new line branching device was additionally installed to prevent the urban aesthetics from deteriorating, the service quality deteriorating, and the signal level fluctuation due to cable laying again.

However, when installing the "wired broadcasting line branching device" or "furniture dense amplification distribution device" having such a configuration, remove all the existing coaxial cables to separate the voltage and broadcast signals, and separate them from the outside of the coaxial cable. Since an expensive pay cable having a configuration in which the power supply line is integrally formed is required to be installed, there are problems such as an increase in material cost and labor cost.

The present invention has been devised to solve this conventional problem, and is installed on the existing branch connector connector and receives various image signals, data, and voltages transmitted from the central broadcasting center through the original line, and thus the voltage and the broadcast signal. The quality of service by compensating for the line distribution loss without using a separate amplifier by allowing it to be delivered to each household's subscriber's furniture through a general coaxial cable while amplified by an amplifier operated by a separate voltage after being separated by Deterioration, signal level fluctuation can be prevented in advance, as well as labor and installation costs associated with the installation of amplifiers can be reduced. In addition, expensive voltage and broadcast signal branch type wired broadcasting line branching devices or An object of the present invention is to provide an amplification distribution device for wired broadcasting that can prevent an increase in installation and labor costs due to the installation of a furniture-type amplification distribution device and the use of a pair cable that interconnects them.

The above object of the present invention, the first choke coil for transmitting only the voltage from the broadcast signal and the voltage transmitted through the original line in the mixed state to the next amplification distribution device side; A signal diverter which transmits a broadcast signal from a voltage and a broadcast signal transmitted through the original line in a mixed state to a next amplification distribution device and simultaneously transmits the broadcast signal to a first deplexer; A first diplexer for separating a high-band video signal and a low-band data from the broadcast signal that is branched and transmitted through the signal branching unit, and transmitting the data to a first amplifier; A first amplifier for amplifying the image and data signals input through the first deplexer to a predetermined level; A second diplexer for separating the high-band video signal and the low-band data from the broadcast signal transmitted from the subscribers and transmitting the data to the second amplifier; A second amplifier for amplifying the image and data signals input through the second deplexer to a certain level; A low-pass filter that removes various noise signals included in the broadcast signals input from the first amplifier and subscribers and delivers only pure broadcast signals; An impedance matcher and a broadcast signal divider that mutually matches the broadcast signal received through the low-pass filter with the antenna impedance of the subscriber's TV receiver and distributes it through several taps and delivers it to each subscriber's home; A second choke coil for extracting only the voltage from the broadcast signal and the voltage transmitted through the original line in a mixed state; It can be achieved by rectifying the AC voltage inputted through the second choke coil to a constant DC voltage to constitute a switching mode power supply provided to each part.

Therefore, when the tap of an existing line branch device installed in a specific distribution pole is insufficient or a new branch device is to be installed, the device of the present invention is installed using the coaxial cable and connector as it is, and the voltage and broadcast signal transmitted through the original line After isolating, the apparatus of the present invention can be driven by the voltage, and then only the broadcast signal can be transmitted to the subscriber furniture in each building through a general coaxial cable, so regardless of the distance between the subscriber furniture without using a separate amplifier. Broadcast signals can be transmitted without loss of line distribution, so high-quality broadcast signals can be delivered to each member of the household without any change in signal level, and service quality can be greatly improved, and labor and installation costs of amplifiers can be reduced. , High-quality voltage and broadcast signals between the original line and subscribers. High-quality broadcast signals can be delivered to each subscribing household without the use of branched wired broadcasting line branching devices or furniture-dense amplification distribution devices and the use of a pair cable interconnecting them. It is possible to prevent the increase in installation cost and labor cost accordingly.

Hereinafter, preferred embodiments of the apparatus of the present invention will be described in detail with reference to the accompanying drawings.

4 shows a block diagram of the device of the present invention, and FIG. 5 shows an exemplary installation state of the device of the present invention.

According to this, the first choke coil 28 for transmitting only the voltage from the broadcast signal and the voltage transmitted through the original line 16 in the mixed state to the next amplification distribution device side;

A signal branch unit 20 for transmitting a broadcast signal from a voltage and a broadcast signal transmitted through the original line 16 in a mixed state to a next amplifying distribution device and simultaneously transmitting the broadcast signal to the first diplexer 21;

A first diplexer (21) for separating a high-band video signal and a low-band data from a broadcast signal that is branched and transmitted through the signal branch unit (20) and transmitting the data to a first amplifier;

A first amplifier 22 for amplifying the image and data signals input through the first deplexer 21 to a predetermined level;

A second diplexer (23) for separating a high-band video signal and a low-band data from a broadcast signal transmitted from subscribers and transmitting the data to a second amplifier;

A second amplifier 24 for amplifying the image and data signals inputted through the second deplexer 23 to a predetermined level;

A low-pass filter 25 for removing various noise signals included in the broadcast signal input from the first amplifier 22 and subscribers and transmitting only a pure broadcast signal;

Impedance matcher and broadcast signal distributor that broadcasts the signal transmitted through the low pass filter 25 and matches it with the antenna impedance of the subscriber's TV receiver and distributes it through several tps (T1-Tn) to each subscriber's home (26) and;

A second choke coil 29 for extracting only the voltage from the voltage and broadcast signal transmitted through the original line 16 in a mixed state;

It is characterized in that it consists of a switching mode power supply 27 provided to each part by rectifying the AC voltage input through the second choke coil 29 to a constant DC voltage.

When explaining the effect of the device configured as described above is as follows.

First, when performing the initial cable construction or increasing the number of taps due to the increase in the number of subscribers, broadcasters diverge only the broadcast signal and install the existing cable broadcasting line branching device to each subscriber. When the device of the present invention is installed in the connector connection part of the present invention, amplification is performed when transmitting a broadcast signal to each subscriber, and then transmission is prevented. Broadcast signals can be delivered to each subscriber's household, significantly improving service quality.

Of course, the impedance matching device and the broadcast signal distributor 26 of the device of the present invention are equipped with at least 8 or more (8, 16, 32, etc.) broadcast signal output tabs (T1-Tn), so that the same number of subscribers A can receive a wired broadcast signal through one device of the present invention.

Meanwhile, when various broadcast signals (ie, video signals and data, etc.) and AC voltages are transmitted from a central broadcasting center, such as a specific cable broadcasting or cable broadcasting, through a relay cable 16, the first choke 28 It detects only the voltage and transfers it to the side of another existing cable broadcasting line branching device or amplifying distribution device, and the signal branching unit 20 separates the broadcasting signal altogether to the next conventional cable broadcasting line branching device or amplifying distribution device side. Simultaneously with the delivery, it is delivered to the first deplexer 21.

In addition, since the second choke coil 29 extracts only the voltage transmitted through the original line 16 and the voltage from the broadcast signal in a mixed state and transmits it to the switching power supply 27, the switching mode power supply ( 27) As the AC voltage input through the second choke coil 29 is rectified to a constant DC voltage and provided to each part, the amplification part of the device of the present invention is applied to the DC voltage provided by the switching mode power supply 27. It has a form that can be driven by itself.

On the other hand, the first diplexer 21 that receives a broadcast signal through the signal branch unit 20 separates the broadcast signal into a video signal of a high band (H) and a data of a low band (L) and separates the first amplifier ( 22).

Therefore, the first amplifier 22 amplifies the image and data signals input through the first deplexer 21 to a certain level and transmits them to the low-pass filter 25 through the second diplexer 23. The low-pass filter 25 removes various noise signals included in the broadcast signal input through the first amplifier 22 and transmits only the pure broadcast signal to the impedance matcher and broadcast signal distributor 26.

Therefore, the impedance matcher and the broadcast signal divider 26 impedance-matches the broadcast signal transmitted through the low-pass filter 3 and distributes it through several taps T1-Tn to receive the amplified signal to each subscriber's home. Will be delivered.

On the other hand, the video signal and data sent from each subscriber is again transmitted to the second diplexer 23 through the impedance matcher and the broadcast signal divider 26 and the low pass filter 25, and the high pass video signal and low pass After being separated by the data of the is transmitted to the second amplifier (24).
Accordingly, the second amplifier 24 amplifies the image and data signals input through the second deflector 23 to a certain level, and then the first diplexer 21, the signal diverter 20, and the original line. Will be delivered to the central broadcasting center.
In this way, the device of the present invention is provided with a bi-directional amplifier that is driven by itself by the voltage supplied from the central broadcasting center, so it is possible to compensate for the loss due to signal distribution in both directions, so cable insertion loss and line distribution loss due to the extension of the distance are provided. It can also compensate, which can significantly improve service quality.

On the other hand, an expensive pair cable (i.e., a coaxial cable for transmitting a broadcast signal and a power supply line) are integrated between the device of the present invention and each subscriber, as in the case of using a "wired broadcast line branching device" Without using the provided cable), it is necessary to directly connect the broadcast signal to the subscriber by directly connecting it through a coaxial cable that is already in use. Can get the effect of

In this way, the device of the present invention is provided with a bi-directional amplifier that is driven by itself by the voltage supplied by the central broadcasting center, so it is possible to compensate for loss due to signal distribution in both directions, so cable insertion loss and line distribution loss due to the extension of the distance are provided. It can also compensate, which can significantly improve service quality.

On the other hand, an expensive pair cable (i.e., a coaxial cable for transmitting a broadcast signal and a power supply line) are integrated between the device of the present invention and each subscriber, as in the case of using a "wired broadcast line branching device" Without using the provided cable), it is necessary to directly connect the broadcast signal to the subscriber by directly connecting it through a coaxial cable that is already in use. In addition, even if the distance between the branch and the amplifying device and the subscriber is far, no separate amplifier is required, and the maximum cost is minimal. Can get the effect of

As described above, according to the present invention, by installing and replacing the connector connection portion of the existing branch on the original line, the voltage is transmitted along with various video signals and data from a central broadcasting center such as satellite broadcasting and cable TV or general cable broadcasting. The quality of the service is compensated by compensating for the line distribution loss without using a separate amplifier by allowing the device itself to be operated so that various video signals and data can be distributed to each subscriber in good quality without loss through the existing coaxial cable. Deterioration, signal level fluctuation can be prevented in advance, as well as labor and installation costs associated with the installation of amplifiers can be reduced. In addition, expensive voltage and broadcast signal branch type wired broadcasting line branching devices or It is a very useful invention, such as installation of a furniture-dense amplification distribution device and the use of a pair cable that interconnects them, can greatly reduce installation and labor costs.

Claims (1)

A first choke coil 28 for transmitting only the voltage transmitted from the original line 16 in the mixed state and the voltage from the broadcast signal to the next amplifying distribution device side; A signal branch unit 20 for transmitting a broadcast signal from a voltage and a broadcast signal transmitted through the original line 16 in a mixed state to a next amplifying distribution device and simultaneously transmitting the broadcast signal to the first diplexer 21; A first diplexer (21) for separating a high-band video signal and a low-band data from a broadcast signal that is branched and transmitted through the signal splitter (20) and transmitting the data to a first amplifier; A first amplifier 22 for amplifying the image and data signals input through the first deplexer 21 to a predetermined level; A second diplexer (23) for separating a high-band video signal and a low-band data from a broadcast signal transmitted from subscribers and transmitting the data to a second amplifier; A second amplifier 24 for amplifying the image and data signals inputted through the second deplexer 23 to a predetermined level; A low-pass filter 25 for removing various noise signals included in the broadcast signal input from the first amplifier 22 and subscribers and transmitting only a pure broadcast signal; Impedance matcher and broadcast signal distributor that broadcasts the signal transmitted through the low pass filter 25 and matches it with the antenna impedance of the subscriber's TV receiver and distributes it through several tps (T1-Tn) to each subscriber's home (26) and; A second choke coil 29 for extracting only the voltage from the voltage and broadcast signal transmitted through the original line 16 in a mixed state; Amplifying and distributing device for wired broadcasting, characterized in that it consists of a switching mode power supply (27) that rectifies the AC voltage input through the second choke coil (29) to a constant DC voltage and provides it to each part.

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