KR100682758B1 - Multiplex output broadcasting receive system using cas(conditional access system) of single set-top box - Google Patents

Abstract

A multi-output broadcasting receiving system using a conditional access function of a single STB(Set Top Box) is provided to allow a user to independently view a TV in each room through one STB and simultaneously and remotely control the STB through a remote controller in another place in which the STB is not installed by adopting filter technique to maintain IR(Infrared) data of the remote controller and an RF(Radio Frequency) A/V signal of the TV in a single RF line and decrypting two or more inter-different encrypted channels by using one authentication card. An STB(100) has the first broadcasting reception processing module(110), one or more second broadcasting reception processing modules(120), and a CAS(Conditional Access System)(101). The first broadcasting reception processing module(110) selects a channel of a broadcasting signal received from an external transmission medium according to an input operation of a user, and outputs an A/V broadcasting signal of the selected channel. The second broadcasting reception processing modules(120) select a channel of a broadcasting signal received from the external transmission medium according as a remote control signal is received, modulate the A/V remote broadcasting signal of the selected channel as a certain broadcasting frequency, and output the modulated A/V remote broadcasting signal. If a program identifier is received from the first broadcasting reception processing module(110), the CAS(101) reads a key value corresponding to the program identifier from an authentication card and outputs the read key value to the first broadcasting reception processing module(110). Each of one or more host network connecting units(130) has the first filter(131) and the second filter(132). If an STB control signal is received through a specific network, the first filter(131) filters the STB control signal, and provides the filtered signal as the remote control signal to the second broadcasting reception processing modules(120). If the A/V remote broadcasting signal is received through the second broadcasting reception processing modules(120), the second filter(132) filters the A/V remote broadcasting signal and passes the filtered signal through the network. One or more remote control signal receiving units(150) sense and output the STB control signal transmitted from a remote controller. Each of one or more guest network connecting units(160) has the third filter(161) and the fourth filter(162). If the STB control signal is received through the remote control signal receiving units(150), the third filter(161) filters the STB control signal and passes the filtered signal through the network. The fourth filter(162) filters and passes the A/V remote broadcasting signal provided from the network.

Description

Multiple output broadcasting receive system using conditional access system (CAS) of single set-top box}

1 is a functional block diagram showing a configuration of a multiple output broadcast reception system using a reception limitation function of a single set top box according to an embodiment of the present invention;

FIG. 2A is a functional block diagram illustrating an internal configuration of a reception restriction module in a multiple output broadcast reception system using a reception limitation function of a single set top box according to FIG. 1; FIG.

FIG. 2B is a functional block diagram illustrating an internal configuration of a first broadcast reception processing module in a multiple output broadcast reception system using a reception limitation function of a single set top box according to FIG. 1; FIG.

FIG. 2C is a functional block diagram illustrating an internal configuration of a second broadcast reception processing module in a multiple output broadcast reception system using a reception limitation function of a single set top box according to FIG. 1. FIG.

3A is a diagram illustrating a broadcasting channel frequency used as a carrier frequency in order to transmit a broadcast signal through a network in a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention;

3B is a diagram illustrating a process of transmitting a room call using a specific broadcast channel frequency in a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention;

3C is a diagram illustrating a process of transmitting a broadcast signal using an intermediate frequency avoiding a broadcast channel frequency in a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention;

4 is a diagram illustrating a process of transmitting a set-top box control signal using frequency shift keying (FSK) modulation in a multiple output broadcast reception system using a reception limit function of a single set-top box according to an embodiment of the present invention;

FIG. 5 is a functional block diagram illustrating a configuration of a multiple output broadcast reception system using a reception limitation function of a single set top box according to a second embodiment of the present invention; FIG.

FIG. 6 is a system configuration diagram showing a modified example in which there are several spaces in a multiple output broadcast reception system using the reception limit function of a single set top box according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: set-top box 101: reception restriction module

102: reception limit module control unit 103: FIFO memory

104: authentication card 110: first broadcast receiving processing module

111: broadcast signal receiving unit 112: MPEG decoding processing unit

113: A / V broadcast signal output unit 114: first broadcast receiving processing module control unit

115: descrambler 120: second broadcast receiving processing module

121: broadcast signal receiving unit 122: MPEG decoding processing unit

123: broadcast signal modulator 124: amplifier

125: remote control signal extraction unit 126: second broadcast receiving processing module control unit

127: descrambler 130: host network connection

131: first filter 132: second filter

136: FSK demodulator 140: first TV receiver

150: remote control signal receiver 160: guest network connection

161: third filter 162: fourth filter

165: modulator 166: FSK modulator

170: second TV receiver 180: wireless remote control

190: network

200: set top box 201: reception restriction module

204: authentication card 210: first broadcast receiving processing module

220: second broadcast receiving processing module 230: host network connection

231: first filter 232: second filter

240: first TV receiver 250: remote control signal receiver

260: guest network connection 261: third filter

262: fourth filter 270: second TV receiver

280: wireless remote control 290: network

The present invention relates to a multiple output broadcast reception system using the reception limit function of a single set-top box, and more particularly, a plurality of set-top boxes and a plurality of places each installed in a home through a network consisting of TV RF lines already installed in a building. Connect two TV receivers, combine filter technology to allow IR data from the remote control and TV RF A / V signals to coexist within the RF line, and use two authentication channels with two or more different encrypted channels. By allowing users to decrypt their passwords, users can watch TV independently from each remote location via a single set-top box. In addition, the present invention relates to a multiple output broadcast reception system using a reception limit function of a single set top box that enables remote control of the set top box through a remote control in another place where the set top box is not installed.

In recent years, with the rapid development of digital technologies such as digital image compression and digital modulation / demodulation, standardization and commercialization of digital television (TV) broadcasting is rapidly progressing. In such a situation, a digital broadcast receiver such as a set top box (STB) that receives digital television broadcasts uses an original A / V (Audio / Video) by using a decoder provided in a receiver for a broadcast program selected by a user. After the data is restored, it is transmitted to an A / V output device such as a general TV, so that the user can selectively watch the broadcast program.

In addition, in recent years, most homes have one TV set in various places such as a home room, a living room, a study room, and the like. In the case of connecting these TVs to one set-top box, satellite TV, There is an advantage that you can watch cable broadcasting, digital terrestrial broadcasting.

However, the conventional method of connecting one set-top box to multiple TVs is not only difficult to transmit lossless signals from the set-top box to each room, but also requires additional line construction through track work in the home, thereby increasing installation costs. And there was a problem that the difficulty of the installation process occurs.

In addition, according to the conventional method of connecting one set-top box to multiple TVs, if you want to remotely control the set-top box from another place where the set-top box is not installed, purchase an expensive RF (UHF) remote control transceiver separately. Since it has to be installed, there is a problem that the inconvenience of redundant installation with the occurrence of cost duplication.

In addition, when one set-top box is to be provided for each TV, there is a problem that an authentication card must be provided for each set-top box in order to solve encryption of a broadcast channel.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to connect one set-top box and a plurality of TV receivers each installed at various places in the home through a TV RF line already installed in the home. By combining filter technology, IR data of the remote control and TV RF A / V signals can coexist within a single RF line, and two or more different encrypted channels can be decrypted using one authentication card. This allows users to watch TV independently in each room through a single set-top box, while also allowing remote control of the set-top box via remote control in other places where the set-top box is not installed. The present invention provides a multiple output broadcast reception system using a reception limitation function of a single set top box.

In order to achieve the above object, a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention selects a channel of a broadcast signal received from an external transmission medium according to a user's input operation. And a first broadcast receiving processing module for outputting the A / V broadcast signal of the selected channel, and selecting a channel of the broadcast signal received from an external transmission medium according to receiving a remote control signal, and then A / V broadcasting of the selected channel. At least one second broadcast receiving processing module for modulating and outputting a signal (hereinafter referred to as an 'A / V remote broadcasting signal') at a predetermined broadcasting frequency, and receiving a program identifier from the first broadcast receiving processing module, A set-top box having a reception limiting module for reading a key value corresponding to the program identifier and outputting the key value to the first broadcast receiving processing module; A first filter for filtering the set-top box control signal through a specific network and providing the remote control signal to the second broadcast receiving processing module; and the A / V remote broadcasting through the second broadcast receiving processing module. At least one host network connection unit having a second filter for filtering the signal when the signal is received and passing it through the network; At least one remote control signal receiver for detecting and outputting a set-top box control signal transmitted from a wireless remote controller; And a third filter for filtering the set-top box control signal from the remote control signal receiver and filtering the set-top box control signal, and a fourth filter for filtering and passing the A / V remote broadcasting signal provided from the network. One or more guest network connections; is configured to include.

In order to achieve the above object, the multiple output broadcast reception system using the reception limit function of the single set-top box according to the second embodiment of the present invention provides a channel of a broadcast signal received from an external transmission medium according to a user's input operation. A first broadcast receiving processing module which selects and outputs an A / V broadcast signal of the selected channel, and a channel of a broadcast signal received from an external transmission medium in response to receiving a remote control signal, and then selects an A / V of the selected channel. At least one second broadcast receiving processing module for modulating and outputting a broadcast signal (hereinafter referred to as an 'A / V remote broadcasting signal') at a predetermined broadcast frequency, and an authentication card upon receiving a program identifier from the first broadcast receiving processing module. A set top box having a reception limiting module for reading a key value corresponding to the program identifier from the program identifier and outputting the key value to the first broadcast receiving processing module; At least one remote control signal receiver for detecting a set-top box control signal transmitted from a wireless remote controller and outputting the detected signal to the network; And at least one guest network connection unit having a fourth filter for filtering and passing the A / V telecast signal provided from the network.

Hereinafter, a multiple output broadcast reception system using a reception limitation function of a single set top box according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram illustrating a configuration of a multiple output broadcast reception system using a reception limitation function of a single set top box according to an embodiment of the present invention.

Hereinafter, in order to simplify the description of the present invention, a detailed description of general known functions and configurations of the set-top box 100 that may unnecessarily obscure the subject matter of the present invention will be omitted.

In the multiple output broadcast reception system using the reception limit function of a single set-top box according to an embodiment of the present invention, as shown in FIG. 1, the reception limit module 101, the first broadcast reception processing module 110, and the second It is composed of a set-top box 100 having a broadcast receiving processing module 120, a host network connection unit 130, a remote control signal receiving unit 150 and a guest network connection unit 160.

On the other hand, Figure 6 is a system configuration diagram showing a modification in the case where there are multiple spaces in the multiple output broadcast reception system using the reception limit function of a single set-top box according to the present invention, Figure 6 Set-top box 100 having a reception restriction module 101, a first broadcast reception processing module 110, and at least one second broadcast reception processing module 120, at least one host network connection unit 130, at least one remote control It consists of a signal receiver 150 and one or more guest network connectors 160. In this case, as shown in FIG. 6, the host network connection unit 130 may have the same number as the second broadcast receiving processing module 120 and may be configured to be connected to the second broadcast receiving processing module 120 correspondingly. Alternatively, only one host network connection unit 130 is provided to mix the signals output from each of the broadcast receiving processing modules 120 and output to the second filter 132 of the host network connection unit 130, and the first filter ( 131 may be configured to output a signal provided from each of the second broadcast receiving processing modules 120.

In the multi-output broadcasting reception system using the reception limit function of a single set-top box according to an embodiment of the present invention, as shown in Figs. 1 to 5, there are two spaced apart rooms or multiple spaced rooms as shown in FIG. Even if it is extended as it is within the scope not departing from the technical spirit of the present invention, repeated description of the same configuration is omitted.

When the reception restriction module 101 receives a program identifier from the first broadcast reception processing module 110, the reception restriction module 101 reads a key value corresponding to the program identifier from the authentication card and outputs the key value to the first broadcast reception processing module 110. As shown in FIG. 2A, the reception limiting module control unit 102 and the FIFO memory 103 are provided.

FIG. 2A is a functional block diagram illustrating an internal configuration of a reception restriction module in a multiple output broadcast reception system using a reception limitation function of a single set top box according to FIG. 1.

The reception restriction module control unit 102 receives a program identifier from the first broadcast reception processing module 110 and stores the program identifier in the FIFO memory 103 and stores the key value corresponding to the program identifier stored in the FIFO memory 103 first. It reads from 104 and outputs to the first broadcast reception processing module 110. In addition, the FIFO memory 103 serves to export the stored contents first according to an external request.

The first broadcast receiving processing module 110 selects a channel of a broadcast signal received from an external transmission medium and outputs an A / V broadcast signal of the selected channel according to a user's input operation, which is illustrated in FIG. 2B. As shown, the broadcast signal receiving unit 111, the MPEG decoding processing unit 112, the A / V broadcast signal output unit 113, the first broadcast receiving processing module control unit 114 and the descrambler 115.

FIG. 2B is a functional block diagram illustrating an internal configuration of a first broadcast reception processing module in a multiple output broadcast reception system using a reception limitation function of a single set top box according to FIG. 1; FIG.

The broadcast signal receiver 111 receives a broadcast signal from an external transmission medium and outputs the broadcast signal to the MPEG decoding processor 112. The MPEG decoding processor 112 decodes the received broadcast signal and processes the D / A conversion. It plays a role.

In addition, the A / V broadcast signal output unit 113 receives a broadcast signal from the MPEG decoding processor 112 and converts the A / V broadcast signal to the first TV receiver 140.

The first broadcast signal processing module control unit 114 extracts a program identifier from the digital broadcast signal received from the broadcast signal receiving unit 111, outputs the program identifier to the reception limiting module 101, and receives a key value from the reception limiting module 101. Play a role. In addition, the first broadcast signal processing module control unit 114 receives a program identifier from the second broadcast receiving processing module 120 and outputs it to the reception limiting module 101, and receives the program identifier from the reception limiting module 101 for the program identifier. When the key value is provided, the key value is provided to the second broadcast receiving processing module 120.

When the descrambler 115 receives a key value from the first broadcast reception module control unit 114, the descrambler 115 receives a broadcast signal from the broadcast signal receiver 111, descrambles the broadcast signal, and outputs the descrambled signal to the MPEG decoding processor 112. It plays a role.

The second broadcast receiving processing module 120 selects a channel of a broadcast signal received from an external transmission medium in response to receiving a remote control signal, and then selects an A / V broadcast signal (hereinafter, 'A / V remote of the selected channel). Broadcast signal &quot;) at a predetermined broadcast frequency, which is a broadcast signal receiver 121, MPEG decoding processor 122, broadcast signal modulator 123, and amplifier (shown in FIG. 2C). 124, a remote control signal extracting unit 125, a second broadcast receiving processing module control unit 126, and a descrambler 127.

FIG. 2C is a functional block diagram illustrating an internal configuration of a second broadcast reception processing module in a multiple output broadcast reception system using a reception limit function of a single set top box according to FIG. 1.

The broadcast signal receiver 121 receives a broadcast signal from an external transmission medium and outputs the broadcast signal to the MPEG decoding processor 122. The MPEG decoding processor 122 decodes the received broadcast signal and processes the D / A conversion. It plays a role.

The broadcast signal modulator 123 receives the broadcast signal from the MPEG decoding processor 122, modulates the broadcast signal to a predetermined broadcast frequency, and outputs it to the second filter 132. The remote control signal extractor 125 receives the first filter. It extracts the remote control signal provided from 131 and outputs it.

 The second broadcast receiving processing module controller 126 extracts a program identifier from the digital broadcast signal received from the broadcast signal receiving unit 121, outputs the program identifier to the first broadcast receiving processing module 110, and then outputs the first broadcast receiving processing module 110. Receives a key value from the), and sets the broadcast channel of the broadcast signal receiver according to the remote control signal received from the remote control signal extraction unit 125. In addition, the second broadcast receiving processing module control unit 126 has a processing function of system setting, menu setting, PVR (Personal Video Recoreder) control, and EPG (Electronic Program Guide) control according to the remote control signal. In this case, as shown in FIG. 6, when a plurality of second broadcast receiving processing modules 120 are provided and connected in a daisy chain form, the second broadcast receiving processing module controller 125 may limit reception. When the program identifier is received from the second second broadcast receiving processing module 120 connected to the module 101 in a distant direction, the third connected to the first broadcast receiving processing module 110 or the reception limiting module 101 in a direction close to the module 101. Outputs to the second broadcast receiving processing module 120, and receives the key value for the program identifier from the first broadcast receiving processing module 110 or the third second broadcast receiving processing module 120, and receives the second broadcast receiving the key value. It serves to provide to the processing module 120.

When the descrambler 127 receives a key value from the second broadcast receiving processing module controller 125, the descrambler 127 receives a broadcast signal from the broadcast signal receiver 121 and descrambles the broadcast signal to the MPEG decoding processor 122. It plays a role of outputting.

In this case, an amplifier 124 may be installed at the end of the broadcast signal modulator 123 to compensate for the loss of the A / V remote broadcast signal according to the line distance.

Here, the first broadcast receiving processing module 110 and one or more second broadcast receiving processing module 120 may be implemented by one chipset, or may be implemented by a separate separate chipset.

The host network connection unit 130 receives the set-top box control signal through a specific network 190 and filters the set-top box control signal to provide the remote control signal to the second broadcast receiving processing module 120, and the first filter 131. When the A / V remote broadcasting signal is received through the 2 broadcast receiving processing module, the second filter 132 is filtered and passed through the network 190.

The remote control signal receiver 150 detects and outputs a set-top box control signal transmitted from the wireless remote controller 180.

In addition, the guest network connection unit 160 receives the set-top box control signal from the remote control signal receiving unit 150 and filters the filter to pass it to the network 190 and the A / provided from the network 190. And a fourth filter 162 for filtering and passing the V telecast signal.

In this case, in general, the first filter 131 and the third filter 161 are a low pass filter (LPF) covering the remote control control signal frequency band, and the second filter 132 and the fourth filter 162 are VHF / UHF. It is a high pass filter (HPF) covering the frequency band.

The set top box 100 may be configured as a single set including the host network connection unit 130 including the first filter 131 and the second filter 132. The guest network connection unit 160 having the four filters 162 may be configured as a single set including the remote control signal receiving unit 150.

In addition, the network 190 generally refers to a pre-installed TV coaxial cable or a separately installed network cable.

Then, the operation of the multi-output broadcast reception system using the reception limitation function of the single set-top box according to an embodiment of the present invention having the above configuration will be described with reference to FIGS. 1 and 2, but the host of the set-top box is described. The network connection unit 130 is installed in the living room, and the guest network connection unit 160 is installed in another place (room, study room, etc.), and the host network connection unit 130 and the guest network connection unit 140 each use a coaxial cable. It is assumed that it is connected to the RF terminal installed on the wall through the description.

First, the user inserts the authentication card 104 into the set-top box 100 to enable the user authentication by a conditional access system (CAS) 101.

First, a user of a place where the set-top box 100 is installed describes an authentication process for watching a broadcast using a first TV receiver as follows.

After the broadcast signal receiving unit 111 of the first broadcast receiving processing module 110 receives a broadcast signal from an external transmission medium, the first broadcast receiving module control unit 114 receives a digital broadcast signal of a channel selected according to a user's input operation. ) Is output to the MPEG decoding processing unit 112. If the received broadcast signal is not encrypted for reception restriction, the MPEG decoding processing unit 112 may decode the broadcast signal and then output the D / A conversion process. However, when the received broadcast signal is encrypted, it is necessary to decode the broadcast signal after describing the broadcast signal using a key value for the corresponding broadcast program.

To this end, the first broadcast receiving processing module control unit 114 receives a broadcast signal from the broadcast signal receiving unit 111, extracts a program identifier, and then outputs the program identifier to the reception limiting module (CAS) 101.

Then, the reception limiting module 101 stores the program identifier in the FIFO memory 103 to process the received program identifier in the order of first input. The reception restriction module 101 retrieves a matching key value by calling a program identifier first input from the FIFO memory 103 by checking the key value stored in the authentication card. At this time, a plurality of key values for user authentication for the corresponding program are stored in the authentication card. When the reception restriction module 101 finds a matching key value, the corresponding key value is output to the first broadcast reception processing module control unit 114, and the first broadcast reception processing module control unit 114 transmits the corresponding key value to the descrambler 115. Output

The descrambler 115 receives a broadcast signal from the broadcast signal receiving unit 111 and descrambles the broadcast signal using the corresponding key value received from the first broadcast receiving processing module control unit 114. The broadcast signal restored to the broadcast signal before encryption is transmitted to the MPEG decoding processing unit 112 through the descramble process, and the MPEG decoding processing unit 112 decodes the broadcasting signal and then performs D / A conversion processing to A / V broadcasting. The signal output unit 113 outputs the signal.

Then, the A / V broadcast signal output unit 113 modulates the broadcast signal into an A / V signal and outputs it to the first TV receiver 140. Through this process, the user of the place where the set-top box is installed broadcasts. You can watch.

Secondly, a description will be given of an authentication process for watching a broadcast using a second TV receiver by a user of a remote location where the set-top box 100 is not installed.

When the user of the remote location performs the remote control through the wireless remote controller 180, the remote control signal receiver 150 detects the set-top box control signal transmitted from the wireless remote controller 180 to filter the third network of the guest network connection unit 160 The third filter 161 of the guest network connection unit 160 filters the set-top box control signal and passes it to the network 190.

Then, the first filter 131 of the host network connection unit 130 receives the set-top box control signal sent from the guest network connection unit 160 from the network 190 and filters it and outputs it to the second broadcast receiving processing module 120. The second broadcast receiving processing module 120 receives a signal (remote control signal) from which the set-top box control signal is filtered from the first filter 131 of the host network connection unit 130. Then, the second broadcast receiving processing module 120 modulates the A / V remote broadcast signal received from the external transmission medium according to the remote control signal and outputs the second filter 132 of the host network connection unit 130. In this case, in the process of converting the broadcast signal received from the external transmission medium into the A / V remote broadcast signal, if the broadcast signal is encrypted, the process of authenticating the user and decrypting the broadcast signal should be included. The user authentication process in the second broadcast receiving processing module 120 is as follows.

The broadcast signal receiver 121 of the second broadcast receiver module 120 receives a broadcast signal from an external transmission medium and outputs it to the second broadcast receiver module controller 126 and the MPEG decoding processor 122. If the received broadcast signal is not encrypted for the reception restriction, the MPEG decoding processing unit 122 may decode the broadcast signal and output the D / A conversion process. However, when the received broadcast signal is encrypted, it is necessary to decode the broadcast signal after describing the broadcast signal using a key value for the corresponding broadcast program.

To this end, the second broadcast receiving processing module controller 126 receives a broadcast signal from the broadcast signal receiving unit 121, extracts a program identifier, and then outputs the program identifier to the first broadcast receiving processing module 110. Then, the first broadcast receiving processing module control unit 114 receives a program identifier from the second broadcast receiving processing module 120 and outputs it to the reception limiting module 101. At this time, the process of obtaining the key value corresponding to the program identifier from the authentication card 104 is the same as the process described above. The first broadcast reception processing module control unit 114 receives a key value for the program identifier from the reception restriction module 101 and provides it to the second broadcast reception processing module 120.

In this case, as shown in FIG. 6, when a plurality of second broadcast receiving processing modules 120 are provided and connected in a daisy chain form, a program identifier is transmitted to the reception limiting module 101 in the meantime. It must pass through a plurality of second broadcast receiving processing module 120 and the first broadcast receiving processing module (110). In order to implement this, the second broadcast receiving processing module controller 125 operates as follows. The second broadcast receiving processing module controller 125 receives the program identifier from the second second broadcast receiving processing module 120 connected in a distant direction with the reception limiting module 101, and then receives the program identifier from the second broadcast receiving processing module 110. Or outputs to the third second broadcast reception processing module 120 connected in a direction close to the reception restriction module 101, and outputs the program from the first broadcast reception processing module 110 or the third second broadcast reception processing module 120. When the key value for the identifier is provided, the key value is provided to the second second broadcast reception processing module 120. Through this implementation, each second broadcast receiving processing module 120 performs a role of receiving a broadcast signal and extracting a program identifier, and at the same time, carrying a program identifier and a key value received from other broadcast receiving processing modules 110 and 120. It will play the role of.

In this way, when the second broadcast receiving processing module control unit 126 in the second broadcast receiving processing module 120 is provided with a key value corresponding to the program identifier of the corresponding broadcast signal, the second broadcast receiving processing module controller 126 outputs it to the descrambler 127.

The descrambler 127 receives the broadcast signal from the broadcast signal receiving unit 121 and descrambles the broadcast signal using the corresponding key value received from the second broadcast receiving processing module control unit 126. The broadcast signal restored to the broadcast signal before encryption is transmitted to the MPEG decoding processing unit 122 through the descramble process, and the MPEG decoding processing unit 122 decodes the broadcasting signal and then performs D / A conversion to process the broadcasting signal modulation unit. Output to (123).

After the user authentication is performed in the second broadcast receiving processing module 120 through the above process, the broadcast signal modulator 123 modulates the A / V remote broadcast signal converted from the broadcast signal to a predetermined broadcast frequency. Output to the second filter 132.

Thereafter, the second filter 132 of the host network connection unit 130 receives the modulated A / V remote broadcasting signal through the second broadcast receiving processing module 120 and passes the received A / V remote broadcasting signal to the network 190. The fourth filter 162 of the network connection unit 160 receives the A / V remote broadcasting signal and filters it and passes it through. Then, the second TV receiver 170 receives the A / V remote broadcasting signal and displays the broadcast of the corresponding program to the user.

In this case, in general, the first filter 131 and the third filter 161 are a low pass filter (LPF) covering the remote control control signal frequency band, and the second filter 132 and the fourth filter 162 are VHF / UHF. It is a high pass filter (HPF) covering the frequency band.

3A is a diagram illustrating a broadcast channel frequency used as a carrier frequency in order to transmit a broadcast signal through a network in a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention.

As shown in FIG. 3A, in order to output the A / V telecast signal to the network 190 in the second broadcast receiving processing module 120, the A / V telecast signal is specified by the broadcast signal modulator 123. Modulate and output to the channel frequency for broadcasting. A process of using a specific broadcast channel frequency such as FIG. 3A as a carrier frequency is shown in FIG. 3B.

3B is a diagram illustrating a process of transmitting a broadcast signal using a specific broadcast channel frequency in a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention.

Referring to the case illustrated in FIG. 3B, the broadcast signal modulator 123 modulates the A / V telecast signal to 474 MHz corresponding to channel 21 and outputs the same to the second filter 132. The A / V telecast signal modulated at 474 MHz is then transmitted to the fourth filter 162 via the network 190. At this time, if the fourth filter 162 is set to filter and pass a signal corresponding to 474 MHz among the signals input from the network 190, the broadcast signal modulator 123 modulates the output to 474 MHz for channel 21. A / V remote broadcasting signal is passed. Accordingly, the second TV receiver 170 may display the A / V broadcast signal modulated by the broadcast signal modulator 123.

On the other hand, the broadcast signal modulator may use an intermediate frequency that avoids the broadcast channel frequency as a carrier frequency. This is conceptually illustrated in FIG. 3C.

3C is a diagram illustrating a process of transmitting a broadcast signal using an intermediate frequency avoiding a broadcast channel frequency in a multiple output broadcast reception system using a reception limit function of a single set top box according to an embodiment of the present invention.

Referring to the case illustrated in FIG. 3C, the broadcast signal modulator 123 modulates the A / V remote broadcast signal to 478 MHz corresponding to the intermediate frequency of channels 21 and 22 shown in FIG. 3A, and then the second filter. Output to (132). The A / V telecast signal modulated at 478 MHz is then transmitted to the fourth filter 162 via the network 190. At this time, if the fourth filter 162 is configured to filter and pass a signal corresponding to 478 MHz among the signals input from the network 190, the broadcast signal modulator 123 modulates the output to 478 MHz for channel 21. A / V remote broadcasting signal is passed.

In this case, since the second TV receiver 170 is manufactured according to the existing broadcasting channel frequency, the second TV receiver 170 should be modulated into a signal corresponding to the channel 21. Thus, by placing the modulator 165 between the fourth filter 162 and the second TV receiver 170, the modulator 165 is filtered by the fourth filter 162 and passed through a 478 MHz A / V remote. The signal is remodulated to 474 MHz corresponding to channel 21. Accordingly, the second TV receiver 170 may display the A / V broadcast signal modulated by the broadcast signal modulator 123.

4 is a diagram illustrating a process of transmitting a set-top box control signal using frequency shift keying (FSK) modulation in a multiple output broadcast reception system using a reception limit function of a single set-top box according to an embodiment of the present invention. .

The guest network connection unit 160 may be configured to output a modulated frequency shift keying (FSK) modulated signal when the set top box control signal is received from the remote control signal receiver 150. That is, the apparatus further includes an FSK modulator 166 that performs FSK modulation to pass the FSK modulated set-top box control signal to the network 190.

The host network connection unit 130 is then provided with the FSK modulated remote control signal. Next, the FSK demodulation unit 136 performs FSK demodulation to restore the original remote control signal, and then outputs the remote control signal to the remote control signal extraction unit 125 of the second broadcast reception processing module 120 to transmit the remote control signal. Done.

5 is a functional block diagram illustrating a configuration of a multiple output broadcast reception system using a reception limit function of a single set top box according to a second embodiment of the present invention.

While the embodiment shown in FIG. 1 includes all of the first filter 131 to the fourth filter 162, the second embodiment shown in FIG. 5 has the exception of the fourth filter 262. The filter may optionally be included in the component.

The minimum configuration of the multiple output broadcast reception system using the reception restriction function of the single set-top box according to the second embodiment of the present invention shown in FIG. 5 is the reception restriction module 201 and the first broadcast reception processing module 210. And a set top box 200 having a second broadcast receiving processing module 220, a remote control signal receiving unit 250, and a guest network connecting unit 260.

The multiple output broadcast reception system using the reception limit function of the single set-top box according to the second embodiment of the present invention, as shown in FIG. This includes a set-top box 200 having a reception limiting module 201, a first broadcast receiving processing module 210 and at least one second broadcast receiving processing module 220 shown in FIG. 6, at least one remote control signal receiving unit. Minimal configuration may be achieved with corresponding configurations, such as 250 and one or more guest network connections 260.

In the multiple output broadcast reception system using the reception limit function of a single set-top box according to the second embodiment of the present invention, even when there are two spaces as shown in FIG. 5 or multiple spaces as shown in FIG. Since it is extended as it is within the scope without departing from the technical spirit of the present invention, repeated description of the same configuration is omitted.

When the reception restriction module 201 receives a program identifier from the first broadcast reception processing module 210, the reception restriction module 201 reads a key value corresponding to the program identifier from the authentication card and outputs the key value to the first broadcast reception processing module 210. At this time, the configuration of the reception restriction module 201 is the same as the configuration of the reception restriction module 101 in the above-described embodiment.

The first broadcast receiving processing module 210 selects a channel of a broadcast signal received from an external transmission medium and outputs an A / V broadcast signal of the selected channel according to a user's input operation. And a decoding processor, an A / V broadcast signal output unit, a first broadcast receiving module control unit, and a descrambler.

The broadcast signal receiver receives a broadcast signal from an external transmission medium and outputs the broadcast signal to the MPEG decoding processor, and the MPEG decoding processor decodes the received broadcast signal and performs a D / A conversion process.

Also, the A / V broadcast signal output unit receives a broadcast signal from the MPEG decoding processor and converts the A / V broadcast signal into an A / V broadcast signal to output to the first TV receiver 240.

The first broadcast signal processing module controller extracts a program identifier from the digital broadcast signal received from the broadcast signal receiving unit, outputs the program identifier to the reception limiting module 201, and receives a key value from the reception limiting module 201. In addition, the first broadcast signal processing module control unit receives the program identifier from the second broadcast receiving processing module 220 and outputs it to the reception restriction module 201, when receiving the key value for the program identifier from the reception restriction module 201 It serves to provide the key value to the second broadcast receiving processing module 220.

When the descrambler receives a key value from the first broadcast receiving processing module controller, the descrambler receives a broadcast signal from the broadcast signal receiving unit, descrambles the broadcast signal, and outputs the broadcast signal to the MPEG decoding processing unit.

The second broadcast receiving processing module 220 selects a channel of a broadcast signal received from an external transmission medium in response to receiving a remote control signal, and then selects an A / V broadcast signal (hereinafter, 'A / V remote of the selected channel). Broadcasting signal), a broadcast signal receiver, an MPEG decoding processor, a broadcast signal modulator, an amplifier, a remote control signal extractor, a second broadcast receiver module controller, and a descrambler. Consists of

The broadcast signal receiver receives a broadcast signal from an external transmission medium and outputs the broadcast signal to the MPEG decoding processor, and the MPEG decoding processor decodes the received broadcast signal and performs a D / A conversion process.

The broadcast signal modulator receives the broadcast signal from the MPEG decoding processor and modulates the broadcast signal to a predetermined broadcast frequency and outputs the signal to the network or the second filter 232. The remote control signal extractor remotely provides the network or the first filter 231. It extracts the control signal and outputs it.

 The second broadcast receiving processing module controller extracts a program identifier from the digital broadcast signal received from the broadcast signal receiving unit, outputs the program identifier to the first broadcast receiving processing module 210, and receives a key value from the first broadcast receiving processing module 210. And, it plays a role of setting the broadcast channel of the broadcast signal receiver according to the remote control signal received from the remote control signal extractor. In addition, the second broadcast receiving processing module control unit has a processing function of system setting, menu setting, PVR (Personal Video Recoreder) control, and EPG (Electronic Program Guide) control according to the remote control signal. In this case, as shown in FIG. 6, when a plurality of second broadcast reception processing modules 220 are provided and connected in a daisy chain form, the second broadcast reception processing module control unit receives a reception restriction module 201. When the program identifier is received from the second second broadcast receiving processing module 220 connected in a distant direction, the third second broadcast connected in a direction close to the first broadcast receiving processing module 210 or the reception limiting module 201 is received. Outputs to the reception processing module 220, and receives the key value for the program identifier from the first broadcast reception processing module 210 or the third second broadcast reception processing module 220, and returns the key value to the second second broadcast reception processing module ( 220) serves to provide.

When the descrambler receives a key value from the second broadcast receiving processing module controller, the descrambler receives a broadcast signal from the broadcast signal receiver and descrambles the broadcast signal and outputs the broadcast signal to the MPEG decoding processor.

In this case, an amplifier may be installed at the end of the broadcast signal modulator to compensate for the loss of the A / V remote broadcast signal according to the line distance.

Here, the first broadcast receiving processing module 210 and the one or more second broadcast receiving processing module 220 may be implemented by one chipset, or may be implemented by a separate separate chipset.

The remote control signal receiver 250 detects the set-top box control signal transmitted from the wireless remote controller 280 and outputs the signal to the network 290.

In addition, the guest network connection unit 260 includes a fourth filter 262 which filters and passes the A / V remote broadcasting signal provided from the network 290. At this time, the fourth filter 262 is a high pass filter (HPF) covering the VHF / UHF frequency band.

In addition, the network 290 generally refers to a pre-installed TV coaxial cable or a separately installed network cable.

In this case, the guest network connection unit 260 may further include a third filter 261 for filtering the set-top box control signal from the remote control signal receiver 250 and passing the filtered signal to the network 290. Is the same as the embodiment shown in FIG. In this case, the third filter 261 is a low pass filter (LPF) covering the remote control control signal frequency band, and the fourth filter 262 is a high pass filter (HPF) covering the VHF / UHF frequency band.

In addition, when the A / V remote broadcasting signal is received through the second broadcast receiving processing module 220, the host network connection unit 230 having a second filter 232 for filtering the filtered signal and passing it to the network 290 is additionally provided. It can be installed, the other configuration is the same as the embodiment shown in FIG. At this time, the third filter 261 is a low pass filter (LPF) covering the remote control control signal frequency band, the second filter 232 and the fourth filter 262 is a high pass filter (HPF) covering the VHF / UHF frequency band )to be.

In addition, the host network connection unit 230 further includes a first filter 231 for filtering the set top box control signal through the network 290 and providing the remote control signal to the second broadcast receiving processing module 220. Other configurations are the same as the embodiment shown in FIG. In this case, the first filter 231 and the third filter 261 are a low pass filter (LPF) covering the remote control control signal frequency band, and the second filter 232 and the fourth filter 262 are VHF / UHF frequency band. It is a high pass filter (HPF) that covers.

In the multiple output broadcast reception system using the reception limit function of the single set-top box according to the second embodiment of the present invention, the A / V remote broadcast signal output from the broadcast signal modulator in the second broadcast reception processing module 220 may be It may be set to a specific broadcast channel frequency. In addition, the A / V remote broadcast signal output from the broadcast signal modulator in the second broadcast receiving processing module 220 is set to an intermediate frequency avoiding the broadcast channel frequency, and the guest network connection unit generates an intermediate frequency signal. The apparatus may further include a modulator for remodulating and outputting a specific broadcast channel frequency. The operation process for this is the same as the operation process of the multiple output broadcast reception system using the reception limit function of the single set-top box according to the embodiment of the present invention shown in FIG.

In the multiple output broadcast receiving system using the reception limit function of the single set top box according to the second embodiment of the present invention, the guest network connection unit 260 receives the set top box control signal from the remote control signal receiving unit 250 and receives the FSK. (Frequency Shift Keying) It further includes an FSK modulator for modulating and outputting, and the host network connection unit 230 may further include an FSK demodulator for outputting FSK demodulation when the FSK modulated remote control signal is provided. The operation process for this is the same as the operation process of the multi-output broadcast reception system using the reception limit function of the single set-top box according to the embodiment of the present invention shown in FIG.

Although the present invention has been described in more detail with reference to several embodiments, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

As described above, according to the multiple output broadcast reception system using the reception limitation function of a single set-top box according to the present invention, each TV is installed in one set-top box and several places in the home through a TV RF line composed of a network already installed in the home and building. Connect multiple installed TV receivers, combine filter technology to realize coexistence of remote control IR data and TV RF A / V signals within a single RF line, and to authenticate two or more different encrypted channels by one authentication By using a card to decrypt passwords, it allows users to watch TV independently from each remote location via a single set-top box, while using a remote control set-top box from another location where the set-top box is not installed. Remote control is possible, which makes separate construction of line and expensive RF (UHF) And the effect that eliminates the need to buy containers transceiver, an effect that does not need to be equipped with multiple authentication card.

Claims (32)

A first broadcast receiving processing module which selects a channel of a broadcast signal received from an external transmission medium according to a user's input operation and outputs an A / V broadcast signal of the selected channel, and an external transmission medium as a remote control signal is provided; At least one second broadcast receiving processing module for selecting a channel of a broadcast signal received from the channel and modulating and outputting an A / V broadcast signal (hereinafter, referred to as an 'A / V remote broadcast signal') of the selected channel at a predetermined broadcast frequency. And a set top box including a reception limiting module configured to read a key value corresponding to the program identifier from an authentication card and output the key value corresponding to the program identifier from the authentication card when the program identifier is input from the first broadcast reception processing module. A first filter for filtering the set-top box control signal through a specific network and providing the remote control signal to the second broadcast receiving processing module; and the A / V remote broadcasting through the second broadcast receiving processing module. At least one host network connection unit having a second filter for filtering the signal when the signal is received and passing it through the network; At least one remote control signal receiver for detecting and outputting a set-top box control signal transmitted from a wireless remote controller; And A third filter for filtering the set-top box control signal from the remote control signal receiving unit and filtering the set-top box control signal, and a fourth filter for filtering and passing the A / V remote broadcasting signal provided from the network; The guest network connection unit; Multiple output broadcast receiving system using the reception restriction function of a single set-top box configured to include. The method of claim 1, The first broadcast receiving processing module includes: a broadcast signal receiving unit receiving a broadcast signal from an external transmission medium and outputting a digital broadcast signal; An MPEG decoding processing unit which receives a digital broadcasting signal from the broadcasting signal receiving unit, decodes the digital broadcasting signal, and then performs D / A conversion processing; An A / V broadcast signal output unit which receives a broadcast signal from the MPEG decoding processor and modulates the broadcast signal into an A / V signal; A first broadcast receiving processing module controller which extracts a program identifier from the digital broadcast signal received from the broadcast signal receiving unit and outputs the program identifier to the reception limiting module and receives a key value from the reception limiting module; And And a descrambler that receives a broadcast signal from the broadcast signal receiver and descrambles the broadcast signal and outputs the broadcast signal to the MPEG decoding processor when the key value is received from the first broadcast receiving processing module controller. Multiple output broadcast reception system using the reception limit function of a single set top box. The method of claim 2, The first broadcast receiving processing module controller receives a program identifier from the second broadcast receiving processing module and outputs the program identifier to the reception limiting module. When receiving the key value for the program identifier from the reception restriction module, the second broadcast receiving processing module receives the key value. Multi-output broadcasting reception system using the reception limit function of a single set-top box, characterized in that provided by the broadcast receiving processing module. The method of claim 1, The second broadcast receiving processing module includes: a broadcast signal receiving unit receiving a broadcast signal from an external transmission medium and outputting a digital broadcast signal; An MPEG decoding processing unit which receives a digital broadcasting signal from the broadcasting signal receiving unit, decodes the digital broadcasting signal, and then performs D / A conversion processing; A broadcast signal modulator which receives a broadcast signal from the MPEG decoding processor and modulates the broadcast signal to a predetermined broadcast frequency and then outputs it to the second filter; A remote control signal extracting unit for extracting a remote control signal provided from the first filter and outputting the remote control signal; After extracting a program identifier from the digital broadcast signal received from the broadcast signal receiving unit and outputting the program identifier to the first broadcast receiving processing module, and receives a key value from the first broadcast receiving processing module, the remote control signal extracting unit A second broadcast reception processing module controller configured to set a broadcast channel of the broadcast signal receiver according to a remote control signal; And And a descrambler which receives a broadcast signal from the broadcast signal receiver and descrambles the broadcast signal and outputs the broadcast signal to the MPEG decoding processor when the key value is received from the second broadcast receiving processing module controller. Multiple output broadcast reception system using the reception limit function of a single set top box. The method of claim 4, wherein The second broadcast reception processing module control unit receives a program identifier from a second second broadcast reception processing module connected in a direction far from the reception restriction module, and then, in the direction close to the first broadcast reception processing module or the reception restriction module. The second broadcast receiving processing module outputs to the connected second broadcast receiving processing module, and receives the key value for the program identifier from the first broadcast receiving processing module or the third second broadcast receiving processing module and returns the key value to the second second broadcast receiving processing module. Multiple output broadcast reception system using the reception limit function of a single set-top box, characterized in that provided by. The method of claim 5, The second broadcast receiving processing module further comprises an amplifier for compensating for the loss of the A / V remote broadcasting signal according to the line distance. The method of claim 6, The second broadcast receiving processing module control unit receives a single set-top box according to a remote control signal, including system setting, menu setting, PVR (Personal Video Recorder) control, and EPG (Electronic Program Guide) control. Multiple output broadcast reception system using limit function. The method according to any one of claims 1 to 7, The first filter and the third filter are a low pass filter (LPF) covering a remote control control signal frequency band, and the second filter and the fourth filter is a high pass filter (HPF) covering a VHF / UHF frequency band. Multiple output broadcast reception system using the reception limit function of a single set-top box. The method of claim 8, The set top box is a multi-output broadcasting reception system using a reception limit function of a single set top box, characterized in that it comprises a single set including a host network connection unit having a first filter and a second filter. The method of claim 8, And a guest network connection unit including the third filter and the fourth filter comprises a single set including the remote control signal receiver. The method according to any one of claims 4 to 7, And the A / V remote broadcasting signal output from the broadcasting signal modulator in the second broadcasting receiving processing module is set to a specific broadcasting channel frequency. The method according to any one of claims 4 to 7, The A / V remote broadcast signal output from the broadcast signal modulator in the second broadcast receiving processing module is set to an intermediate frequency avoiding a broadcast channel frequency, and the guest network connection part specifies the intermediate frequency signal. A multiple output broadcast reception system using a reception limit function of a single set-top box, characterized in that it further comprises a modulator for remodulating and outputting the broadcast channel frequency. The method according to any one of claims 4 to 7, The guest network connection unit may further include an FSK modulation unit configured to output a frequency shift keying (FSK) modulated signal when the set top box control signal is received from the remote control signal receiving unit, and the host network connection unit provides the FSK modulated remote control signal. And a multi-output broadcast reception system using a reception limit function of a single set-top box, characterized in that it further comprises an FSK demodulator for outputting the FSK demodulated when received. The method of claim 8, The network is a multiple output broadcast reception system using the reception restriction function of a single set-top box, characterized in that the TV coaxial cable or a separately installed network cable. delete A first broadcast receiving processing module which selects a channel of a broadcast signal received from an external transmission medium according to a user's input operation and outputs an A / V broadcast signal of the selected channel, and an external transmission medium as a remote control signal is provided; At least one second broadcast receiving processing module for selecting a channel of a broadcast signal received from the channel and modulating and outputting an A / V broadcast signal (hereinafter, referred to as an 'A / V remote broadcast signal') of the selected channel at a predetermined broadcast frequency. And a set top box including a reception limiting module configured to read a key value corresponding to the program identifier from an authentication card and output the key value corresponding to the program identifier from the authentication card when the program identifier is input from the first broadcast reception processing module. At least one remote control signal receiver for detecting the set-top box control signal transmitted from the wireless remote controller and outputting the detected signal to the network; And At least one guest network connection unit having a fourth filter including a high pass filter (HPF) for filtering the A / V telecast signal provided from the network to cover the VHF / UHF frequency band; Multiple output broadcast reception system using the reception limit function of a single set-top box is configured to include. The method of claim 16, The guest network connection unit may further include a third filter for filtering the set-top box control signal when the set-top box control signal is received from the remote control signal receiver and passing the filtered signal to the network. Broadcast receiving system. The method of claim 17, The third filter is a low pass filter (LPF) covering a remote control control signal frequency band, and the fourth filter is a high pass filter (HPF) covering a VHF / UHF frequency band, the reception limit function of a single set-top box Multi-output broadcast receiving system using a. The method of claim 17, When the A / V remote broadcasting signal is received through the second broadcast receiving processing module, one or more host network connection units including a second filter configured to filter the filtered signal and pass it to the network are additionally installed. Multiple output broadcast reception system using reception restriction function. The method of claim 19, The third filter is a low pass filter (LPF) covering the remote control control signal frequency band, the second filter and the fourth filter is a single set top, characterized in that the high pass filter (HPF) covering the VHF / UHF frequency band Multi-output broadcast reception system using the box reception limit function. The method of claim 19 The host network connection unit further includes a first filter for filtering the set-top box control signal through the network and providing the remote control signal to the second broadcast receiving processing module. Multiple output broadcast reception system using limit function. The method of claim 21, The first filter and the third filter are a low pass filter (LPF) covering a remote control control signal frequency band, and the second filter and the fourth filter is a high pass filter (HPF) covering a VHF / UHF frequency band. Multiple output broadcast reception system using the reception limit function of a single set-top box. The method according to any one of claims 16 to 22, The first broadcast receiving processing module includes: a broadcast signal receiving unit receiving a broadcast signal from an external transmission medium and outputting a digital broadcast signal; An MPEG decoding processing unit which receives a digital broadcasting signal from the broadcasting signal receiving unit, decodes the digital broadcasting signal, and then performs D / A conversion processing; An A / V broadcast signal output unit which receives a broadcast signal from the MPEG decoding processor and modulates an A / V signal and outputs it; A first broadcast receiving processing module controller which extracts a program identifier from the digital broadcast signal received from the broadcast signal receiving unit and outputs the program identifier to the reception limiting module and receives a key value from the reception limiting module; And And a descrambler that receives a broadcast signal from the broadcast signal receiver and descrambles the broadcast signal and outputs the broadcast signal to the MPEG decoding processor when the key value is received from the first broadcast receiving processing module controller. Multiple output broadcast reception system using the reception limit function of a single set top box. The method of claim 23, wherein The first broadcast receiving processing module controller receives a program identifier from the second broadcast receiving processing module and outputs the program identifier to the reception limiting module. When receiving the key value for the program identifier from the reception restriction module, the second broadcast receiving processing module receives the key value. Multiple output broadcast receiving system using the reception limit function of a single set-top box, characterized in that provided by the broadcast receiving processing module. The method according to any one of claims 16 to 22, The second broadcast receiving processing module includes: a broadcast signal receiving unit receiving a broadcast signal from an external transmission medium and outputting a digital broadcast signal; An MPEG decoding processing unit which receives a digital broadcasting signal from the broadcasting signal receiving unit, decodes the digital broadcasting signal, and then performs D / A conversion processing; A broadcast signal modulator for receiving a broadcast signal from the MPEG decoding processor and modulating the broadcast signal to a predetermined broadcast frequency and outputting the broadcast signal to the network or the second filter; A remote control signal extraction unit for extracting a remote control signal provided from the network or the first filter and outputting the remote control signal; After extracting a program identifier from the digital broadcast signal received from the broadcast signal receiving unit and outputting the program identifier to the first broadcast receiving processing module, and receives a key value from the first broadcast receiving processing module, the remote control signal extracting unit A second broadcast receiving processing module controller configured to set a broadcast channel of the broadcast signal receiving unit according to a remote control signal; And And a descrambler which receives a broadcast signal from the broadcast signal receiver and descrambles the broadcast signal and outputs the broadcast signal to the MPEG decoding processor when the key value is received from the second broadcast receiving processing module controller. Multiple output broadcast reception system using the reception limit function of a single set top box. The method of claim 25, The second broadcast reception processing module control unit receives a program identifier from a second second broadcast reception processing module connected in a direction far from the reception restriction module, and then, in the direction close to the first broadcast reception processing module or the reception restriction module. The second broadcast receiving processing module outputs to the connected second broadcast receiving processing module, and receives the key value for the program identifier from the first broadcast receiving processing module or the third second broadcast receiving processing module and returns the key value to the second second broadcast receiving processing module. Multiple output broadcast reception system using the reception limit function of a single set-top box, characterized in that provided by. The method of claim 26, The second broadcast receiving processing module further comprises an amplifier for compensating for the loss of the A / V remote broadcasting signal according to the line distance. The method of claim 27, The second broadcast receiving processing module control unit receives a single set-top box according to a remote control signal, including system setting, menu setting, PVR (Personal Video Recorder) control, and EPG (Electronic Program Guide) control. Multiple output broadcast reception system using limit function. The method of claim 27, And the A / V remote broadcasting signal output from the broadcasting signal modulator in the second broadcasting receiving processing module is set to a specific broadcasting channel frequency. The method of claim 27, The A / V remote broadcast signal output from the broadcast signal modulator in the second broadcast receiving processing module is set to an intermediate frequency avoiding a broadcast channel frequency, and the guest network connection part specifies the intermediate frequency signal. The multiple output broadcast receiving system using the reception limit function of the single set-top box, characterized in that it further comprises a modulator for remodulating and outputting the broadcast channel frequency. The method of claim 27, The guest network connection unit may further include an FSK modulation unit configured to output a frequency shift keying (FSK) modulated signal when the set top box control signal is received from the remote control signal receiving unit, and the host network connection unit provides the FSK modulated remote control signal. And a multi-output broadcast reception system using a reception limit function of a single set-top box, characterized in that it further comprises an FSK demodulator for outputting the FSK demodulated when received. The method of claim 27, The network is a multiple output broadcast reception system using the reception restriction function of a single set-top box, characterized in that the TV coaxial cable or a separately installed network cable.

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