KR200355773Y1 - Amplification Allotter for Use in Cluster House for Wire Broadcasting - Google Patents

Abstract

The present invention relates to a furniture-dense amplification distribution device for cable broadcasting, and in particular, a first deplex which separates a high frequency video signal and a low frequency data from a broadcast signal branched through a line branching device and transfers the low frequency data to a first amplifier. Wow; A first amplifier for amplifying the image and data signals input through the first deplex to a predetermined level; A second deplex that separates the high-frequency video signal and the low-band data from the broadcast signals transmitted from subscribers and transfers the low-frequency data to the second amplifier; A second amplifier for amplifying the image and data signals input through the second deplex to a predetermined level; A low pass filter for removing various noise signals included in the broadcast signal and transmitting only the pure broadcast signal; An impedance matcher and a broadcast signal distributor for matching and distributing broadcast signals to antenna impedances of a subscriber TV receiver through several taps; It is composed of switching mode power supply which rectifies AC voltage branched through line branching device to a certain DC voltage and provides it to each part, so that several cables are connected from one subscriber line branching device to each subscriber. In order to prevent the deterioration of the urban aesthetics, the deterioration of service quality, and the fluctuation of signal level due to the difficulty of management due to the complexity, excessive increase of installation cost and additional cable installation when additional subscribers are installed and re-installed cables. It is.

Description

Amplification Allotter for Use in Cluster House for Wire Broadcasting

The present invention relates to a household dense amplification distribution device for cable broadcasting, and more particularly, it is installed on a cable broadcasting line and driven by voltage transmitted from a central broadcasting center such as satellite broadcasting and cable TV or a general cable broadcasting company. Distributing signals and data to each subscriber in good condition and increasing management costs, increasing installation costs, and increasing subscriber costs due to the complexity of incoming line facilities due to the connection of several cables from one subscriber line branch to each subscriber. It is designed to prevent the deterioration of the urban aesthetics due to the re-installation of cables by installing a new track branch device when it is increased.

In general, as shown in FIG. 1, the cable branching apparatus 17 for cable broadcasting subscribers includes a modulator 11, a signal processor 12, a modem 13, and various video signals provided by satellite broadcasting and cable TV or a general cable broadcasting company. The central broadcasting center 10 having the personal computer 14 and combine 15 is installed in the middle of the main line 16 when transmitting to each subscriber TV receiver. It serves as a branch to the back.

In addition, in the conventional cable broadcasting subscriber line branching device, as shown in FIG. 2, a plurality of subscriber cable connection steps T1-Tn (usually between 2 and 16) are provided outside one case, and the inside thereof is provided. When a video signal including a voltage is transmitted from the central broadcasting center, the video signal divider 32 that separates the broadcast signal and the power supply voltage and delivers the received signal on a continuous line, and is connected to the subscriber through the tap and cable It consists of several impedance matchers 33 and 34 which mutually match the antenna impedance of the TV receiver.

Such subscriber line branching devices are installed on the main line on the distribution line installed around the subscriber building and are connected to each other by the number of subscribers corresponding to the number of taps installed in each line branching device.

However, since the number of cable connection taps installed in the subscriber line branching device is limited, when the number of taps is insufficient due to the increase of each subscriber, another subscriber line branching device is installed on the distribution line of one distribution line. Each subscriber must be connected via a cable.

Therefore, in the case of dense households (for example, multi-family / townhouses, small and medium-sized buildings, etc.), as shown in FIG. 3, several subscriber line branch devices are installed in one distribution line, and each subscriber line branch device is installed. Several cable taps and joining cables in each building must be individually connected to each entry cable.

As such, if the operator installs another subscriber line branch device at the rear end of the transmission network tap output terminal of the subscriber line branch device to secure the terminal, and then installs a cable line for each household, the service quality is deteriorated due to signal loss and poor connection. Of course, there is a problem that the urban aesthetics are impaired by redundantly installing the number of incoming cable corresponding to the number of joining households between one distribution line and the building.

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

In addition, until now, in the early stages of the cable broadcasting relay facility, one or two subscriber line branch devices are installed for most of the cable owners. Shortage is a situation that continues to occur.

The present invention was devised to solve such a conventional problem, and various video signals, data, and voltages transmitted from the central broadcasting center are separately transmitted through the cable broadcasting line branching device and transmitted to the subscriber households in each building. Due to the difficulty of management due to the complexity of the incoming line facility due to the connection of several cables to each subscriber in the subscriber line branch system of the subscriber line, the additional cable branch device is installed and the cable is re-installed when the number of subscribers is increased. The present invention provides a household dense amplification and distribution device for cable broadcasting, which can prevent aesthetics, deterioration of service quality, and fluctuation of signal level.

An object of the present invention described above comprises: a first deplex which separates a high frequency video signal and a low frequency data from a broadcast signal branched and transmitted through a line branching device and transfers the low frequency data to a first amplifier; A first amplifier for amplifying the image and data signals input through the first deplex to a predetermined level; A second deplex that separates the high-frequency video signal and the low-band data from the broadcast signals transmitted from subscribers and transfers the low-frequency data to the second amplifier; A second amplifier for amplifying the image and data signals input through the second deplex to a predetermined level; A low pass filter which removes various noise signals included in broadcast signals inputted from the first amplifier and subscribers and transfers only pure broadcast signals; An impedance matcher and a broadcast signal distributor for matching the broadcast signal received through the low pass filter with the antenna impedance of the subscriber TV receiver and distributing it through several taps to deliver the signal to each subscriber's home; It consists of a switching mode power supply which rectifies the AC voltage transmitted through branch line device to a constant DC voltage and provides it to each part, and is switched between the input terminal and the AC voltage input terminal and the input terminal of the switching mode power supply. By setting the voltage, that is, the form of the voltage supplied from the outside, that is, when the broadcast signal and the voltage is supplied at the same time to the input terminal side, when the broadcast signal and voltage is supplied separately so that it can be used by switching to the AC voltage input terminal, the input This can be achieved by installing a choke coil that passes only the supply voltage between the terminal and the AC voltage input terminal and the fixed terminal of the switch.

Therefore, if the tap of the existing line branch device installed in the specific distribution line is insufficient, it is replaced by the cable broadcasting line branch device that separates the voltage and broadcasting signal, and the present device having several output taps is installed in the building. Therefore, the voltage and broadcasting signal transmitted through the main line can be received through the cable broadcasting line branching device and transmitted to each subscriber, thus eliminating the cable installed between the distribution line and each subscriber's household. Not only can it prevent management difficulties, excessive installation costs, and urban aesthetics, but it can also deliver broadcast signals to each subscriber's household regardless of the distance between the branch and the subscriber's household. Broadcast signal can be delivered to each affiliated household, which can greatly improve the quality of service. A.

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

Figure 2 is a block diagram of a conventional branch line device for cable broadcasting subscriber.

Figure 3 is an exemplary view showing a conventional branched cable broadcasting signal to each subscriber generation.

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

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

6 is a block diagram of a cable broadcasting line branch device supported by the present invention.

※ Explanation of code for main part of drawing ※

21: first deplex 22: first amplifier

23: second deplex 24: second amplifier

25 low pass filter 26 impedance matcher and broadcast signal splitter

27: Switching Mode Power Supply

28: switching switch 29: choke coil

7: pair cable 71: coaxial cable

72: power supply line

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

Figure 4 shows a block diagram of the device of the present invention, Figure 5 shows an example of the installation state of the device of the present invention, Figure 6 shows a block diagram of a cable broadcasting line branch device supported by the device of the present invention. .

According to this, a first deplex 21 for separating the high-frequency video signal and the low-band data from the broadcast signal branched through the line branching device and transferring the low-frequency data to the first amplifier;

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

A second deplex (23) for separating the high frequency video signal and the low frequency data from the broadcast signals transmitted from the subscribers and transmitting the separated high frequency data to the second amplifier;

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

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

Impedance matcher and broadcast signal divider for matching the broadcast signal received through the low pass filter 25 with the antenna impedance of the subscriber TV receiver and distributing it through several taps T1-Tn to deliver to each subscriber home. 26;

On the basis of being composed of a switching mode power supply 27 for rectifying the AC voltage branched and transmitted through the line branching device to a constant DC voltage,

The transfer switch 28 is installed between the input terminal IN, the AC voltage input terminal AC IN, and the input terminal of the switching mode power supply 27 to form a voltage supplied from the outside, that is, a broadcast signal and a voltage. When supplied at the same time, it is switched to the input terminal (IN) side and when the broadcast signal and voltage are supplied separately, it can be used by switching to the AC voltage input terminal (AC), the input terminal (IN) and the AC voltage input terminal (AC) Between the IN) and the fixed terminal of the switch 28 is characterized in that the choke coil 29 for passing only the power supply voltage.

Meanwhile, as shown in FIG. 6, the wire broadcasting line branching device that separates and supplies a voltage and a broadcasting signal to the subject innovation device has various broadcast signals transmitted from the central broadcasting center through the main line 16 together with the power supply voltage. Video signal, data, etc.) are bypassed to the next amplifier or line branching device 17, and are separated into voltage and broadcast signals, and are transmitted to the low-pass filter 3 and the power divider 2, respectively. A signal branch and divider 1; The voltage and the power supply voltage supplied separately from the broadcast signal branch and the distributor 1 are distributed to several power supply steps P1-Pn and installed in each building through the power supply line 72 of the pair cable 7. A power distributor 2 for supplying the furniture dense amplification distributor; A low-pass filter (3) for removing various kinds of noise signals included in the broadcast signal branched through the voltage and the broadcast signal branch and divider (1) and transmitting only pure broadcast signals to the broadcast signal distributor (4); A broadcast signal divider (4) for distributing the broadcast signal input through the low pass filter (3) to first and second impedance matchers and broadcast signal dividers (5) (6); The dense amplified furniture is installed in each building through the coaxial cable 71 of the pair cable 7 by distributing the broadcast signal distributed and inputted by the broadcast signal distributor 4 to several taps T1-Tn. It consists of first and second impedance matcher and broadcast signal splitters 5 and 6, respectively, which are transmitted to the splitter.

Referring to the operation and effect of the device of the present invention configured as described above are as follows.

First of all, when a cable operator performs initial cable construction or increases the number of subscribers, and increases the number of subscribers, the broadcasting company receives support from the device as many as necessary in the vicinity of the distribution line in the middle of the network in response to the concentration of subscribers. The device is installed in the subscriber dense building in the vicinity of the cable branch line device, and the device is installed through the cable to the TV receiver of the subscriber home in the building or each office in the specific building. You can connect it.

Of course, the cable broadcasting line branching device is provided with a power supply tap (P1-Pn) and a broadcast signal output tapping (T1-Tn) in the cable broadcasting line branching device that can be connected to at least eight devices of the present invention. The output tap of the present invention device which is directly cabled to the home TV receiver has at least 8 or 16. Therefore, when the same number of subscribers exist in the surrounding buildings of the cable broadcasting line branch device, the cable broadcasting line branch device and the present invention The number of cables connected between the devices can be reduced to 1/8 or 1/16 as compared to the direct connection between the conventional line branch and the subscriber.

On the other hand, in a central broadcasting center such as a specific cable broadcasting or cable transmission, various broadcasting signals (ie, video signals and data) and AC voltages are transmitted through the main line 16 which is a relay cable. The broadcast signal branch and divider 1 transmits the broadcast signal and the voltage through the line to the next amplifier or the line branch device 17, and separates the voltage and the broadcast signal from each other to separate the low-pass filter 3 and the power supply. Each is delivered to the distributor 2.

Therefore, in the power divider 2, the power supply line of the pair cable 7 connected to several power supply steps P1-Pn by dividing the voltage and the power voltage supplied separately from the broadcast signal branch and the divider 1. Through 72, it is supplied to each of the furniture dense amplification distributors installed in each building.

In addition, the low pass filter 3 removes the low frequency noise signal from the voltage and the broadcast signal branched through the broadcast signal branch and the divider 1 and passes only the pure broadcast signal to the broadcast signal distributor 4. Will be delivered.

In addition, the broadcast signal splitter 4 distributes the pure broadcast signal input through the low pass cut filter 3, so that the first and second impedance matchers and the broadcast signal splitters 5 and 6 and the broadcast signal splitter 5 are distributed. (6) In the first and second impedance matcher and broadcast signal splitter (5) (6), the input broadcast signal is further divided into several taps (T1-Tn) so that the coaxial cable ( Through 71) it is delivered to each of the furniture dense amplification distributor, the device of the present invention installed in each building.

At this time, the pair cable 7 has a configuration in which a separate power supply line 72 is integrally formed on the outer side of a general coaxial cable 71 so as to be spaced apart from each other if necessary. It is.

On the other hand, the device of the present invention has a configuration that can be connected to a maximum of eight wire branch line branch device is installed in a specific part of the building where a large number of subscribers live, connected to the subscriber households in the building through a cable The state has a composition.

In addition, in the switching mode power supply 27 in the device, the AC voltage branched through the cable broadcasting line branching device and transmitted through the power supply line 72 of the pair cable 7 is rectified to a constant DC voltage to each part. It has a function to provide a form that can be driven by itself.

In the first deplex 21 of the present invention, when a broadcast signal is input through a coaxial cable 71 of a pair cable 7 connected to the cable broadcasting line branching device, the video signal of the high frequency (H) and the low range are input. Data of (L) is separated from each other and transferred to the first amplifier 22.

Accordingly, the first amplifier 22 amplifies the image and data signals input through the first deplex 21 to a predetermined level and transfers them to the low pass filter 25 through the second deplex 23. The low pass filter 25 removes various noise signals included in the broadcast signal input through the first amplifier 22 and transfers only pure broadcast signals to the impedance matcher and broadcast signal distributor 26.

Therefore, the impedance matcher and broadcast signal splitter 26 impedance-matches the broadcast signal transmitted through the low pass filter 3 and distributes it through several taps T1-Tn to each subscriber home. .

On the other hand, the video signal and data sent from each subscriber is transmitted to the second deplex 23 through the impedance matcher and broadcast signal splitter 26 and the low pass filter 25 to transmit the high frequency video signal and the low pass. The data is separated into and then transferred to the second amplifier 24.

Accordingly, the second amplifier 24 amplifies the video and data signals input through the second deplex 23 to a predetermined level and is then sent to the present device through the first deplex 21 so that the cable broadcasting is performed. It will be delivered to the central broadcasting center through the original route from the track branching device.

Thus, the device of the present invention is provided with an amplifier in both directions, so that the loss due to signal distribution can be bidirectionally compensated, so that the cable insertion loss and line distribution loss due to the extension of the distance can be compensated, which can greatly improve the quality of service. will be.

On the other hand, when the cable broadcasting line branching device and the present device are connected through the pair cable 7, the voltage and the broadcasting signal are separated, and the broadcasting signal and the power supply voltage are supplied through the coaxial cable 71 and the power supply line 72. Although it does not matter, there is a case in which a general coaxial cable is connected to the input terminal (IN) to receive a broadcast signal and a power supply voltage simultaneously.

In this case, since each device must be driven by separating the voltage from the broadcast signal in the inventive device itself, a switching switch between the input terminal IN, the AC voltage input terminal AC IN, and the input terminal of the switching mode power supply 27. (28), but preferably between the input terminal (IN) and the AC voltage input terminal (AC IN) and the fixed terminal of the switch 28, it is preferable to install a choke coil (29) for passing only the power supply voltage.

Therefore, the user switches the movable terminal of the switch 28 to the input terminal IN when the voltage is simultaneously supplied with the broadcast signal, and the AC voltage input terminal AC when the broadcast signal and the voltage are supplied separately. Can be used.

In addition, when only a broadcast signal is input from the outside, the movable terminal of the switch 28 may be switched to the input terminal IN, and the general commercial voltage supplied in the building may be supplied to the AC voltage input terminal AC.

As described above, according to the present invention, when the tap of the existing line branching device installed in a specific distribution line is insufficient, it is replaced by a cable broadcasting line branching device having a function of separating the voltage and the broadcasting signal. By installing the device of the present invention having an output tap, the voltage and broadcast signal transmitted through the main line are separated and transmitted through the pair cable, which greatly reduces the cable installed between the distribution line and each subscriber's household. Difficult to manage due to the complexity of the incoming ship facility, excessive increase in installation cost and impediment of urban aesthetics can be prevented, and broadcast signal and voltage are transmitted to the subscriber household regardless of the distance between the branch equipment and the subscriber household. It can deliver high quality broadcast signal to each subscribing household without changing signal level. It is a very useful design that can greatly improve the quality of service.

Claims (2)

A first deplex 21 which is branched through a line branching device and separates a high frequency video signal and a low frequency data from a broadcast signal transmitted through an input terminal IN and transmits the separated high frequency data to a first amplifier; A first amplifier 22 for amplifying the image and data signals input through the first deplex 21 to a predetermined level; A second deplex (23) for separating the high frequency video signal and the low frequency data from the broadcast signals transmitted from the subscribers and transmitting the separated high frequency data to the second amplifier; A second amplifier 24 for amplifying the image and data signals input through the second deplex 23 to a predetermined level; A low pass filter 25 for removing various noise signals included in broadcast signals inputted from the first amplifier 22 and subscribers and transmitting only pure broadcast signals; Impedance matcher and broadcast signal divider for matching the broadcast signal received through the low pass filter 25 with the antenna impedance of the subscriber TV receiver and distributing it through several taps T1-Tn to deliver to each subscriber home. 26; Dense furniture for cable broadcasting, which is composed of a switching mode power supply 27 which is branched through a line branching device and rectifies the AC voltage supplied through the AC voltage input terminal (AC IN) to a constant DC voltage. Amplification dispenser. The method according to claim 1, A switching switch 28 is installed between the input terminal IN, the AC voltage input terminal AC IN and the input terminal of the switching mode power supply 27, and the input terminal IN and the AC voltage input terminal AC The dense distribution device for household furniture amplified distribution, characterized in that the choke coil (29) is provided between the fixed terminal of the IN) and the switch 28 to pass only the power supply voltage.