KR100737078B1 - System and method for controlling a chargable channel selection on the broadcasting receiver - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reception limiting device and a control method for pay channel broadcasting in a broadcast receiver, and in particular, a channel of software for tuning and demodulating pay channel broadcasting in a broadcast receiver, and descrambles a pay channel in which pay channel broadcasting is stored in advance. In case of broadcasting, if the software for descrambling of paid channel broadcasting does not meet the preset conditions, the corresponding version of the descrambling software is downloaded and stored through the preset broadcasting channel through the tuner, demodulator, and demux, and the downloaded de The scrambling software generates a control word (CW), which is a random number generation value for decrypting the pay channel broadcast, decodes the bit stream of the pay channel broadcast with the control word, descrambles it, and decodes the video and audio data. . Therefore, the present invention upgrades the version of the descrambling software for CAM and smart card through the broadcast channel received through the tuner, and pays the paid broadcast channel of the desired broadcasting company by processing payment to the server connected through the network when the version is upgraded. This can significantly reduce the cost of buying or version upgrading CAM and smart cards.

Paid Channels, Descrambling Software, Upgrades

Description

Restriction device and control method for pay channel broadcasting in broadcasting receiver {SYSTEM AND METHOD FOR CONTROLLING A CHARGABLE CHANNEL SELECTION ON THE BROADCASTING RECEIVER}

1 is a block diagram showing a reception channel limiter for pay channel broadcasting in a conventional broadcast receiver;

2 is a block diagram illustrating a reception channel limiter for pay channel broadcasting in a broadcast receiver according to the present invention;

3 is a flowchart sequentially illustrating a control method of a reception limiter for pay channel broadcasting in a broadcast receiver according to the present invention;

<Description of the code | symbol about the principal part of drawing>

100, 102: antenna 104: satellite tuner

106: terrestrial broadcast tuner 108, 110: demodulator

112: network connection 114: demux

116: microcomputer 118: network connection

119: authentication / payment server 120: multi CAM / smart card module

122: controller 124: key input unit

126: memory 128: audio decoder

130: video decoder

The present invention relates to a pay channel reception limiting device and a control method in a broadcast receiver, and in particular, so as to tune (tuning) and viewing by canceling the reception restriction of all pay channels through a module having a plurality of CAM modules and a smart card interface. The present invention relates to a reception limiter and a control method for pay channel broadcasting in a broadcast receiver.

A broadcast receiver, which is currently a set-top box, is a receiver that can receive satellite broadcasting, terrestrial broadcasting, cable broadcasting, etc., and receives the received digital broadcasting (video / audio) signal in the form of compressed MPEG-2 TV. Output to a display device.

Broadcasts received by such a broadcast receiver are largely classified into free channel broadcasts and paid channel broadcasts. Currently, pay channel broadcasts are broadcasts scrambled by the following two common interface (CI) and conditional access system (CAS) methods. Descramble to enable viewing.

The first CI method is divided into PCMCIA module, which is a PC card equipped with CAS function to watch pay channel broadcasting. When this module (hereinafter called CAM) is inserted into the CI slot of the digital set-top box, the corresponding CAS function is performed. Represents an interface that is defined to be.

The second CAS method is equipped with a reception limiter for pay channel broadcasting inside a digital set-top box that encrypts a specific broadcast so that the viewer can watch it only after paying a certain amount of money. That is, a card such as a smart card that decodes a control word, which is a descramble key for decoding subscriber information and an encrypted broadcast signal, and an interface module for inserting the same into a CAS slot. do.

1 is a block diagram illustrating a reception channel limiter for pay channel broadcasting in a broadcast receiver according to the related art.

Referring to FIG. 1, a reception limiter for pay channel broadcasting in a conventional broadcast receiver includes an antenna 10, 12, a satellite broadcast and terrestrial broadcast tuner 14, 16, a demodulator 18, 20, and a network connection 22. ), DE-MUX 24, CAM 26, controller 28, smart cards 30, smart card interface 32, micom 34, key input 36, memory ( 38), audio decoder 40, video decoder 42, and the like.

The satellite broadcast tuner 14 and the terrestrial broadcast tuner 16 receive signals transmitted from the antennas 10 and 12, remove noise, and convert them into frequency bands that can be processed by a broadcast receiver that is a set-top box. Only an arbitrary broadcast channel is selected and amplified from the signals provided from the Low Noise Block converter.

The demodulators 18 and 20 frequency convert a transponder including the corresponding broadcast channel received from the satellite broadcast tuner 14 and the terrestrial broadcast tuner 16 to baseband, and perform quadrature phase shift keying (QPSK). And demodulate the frequency of the original broadcast channel to the DE-MUX 24.

The network connection unit 22 receives the cable broadcast and transmits the channel frequency of the cable broadcast to the DE-MUX 24.

The DE-MUX 24 is an EMM (Entitlement Manage Message) packet that is a paid reception restriction signal in a bit stream of a corresponding broadcast signal when the transmitted satellite broadcast channel, terrestrial broadcast channel, or cable broadcast channel is broadcast of a pay channel. And the encrypted random number generation value from the Entitlement Control Message (ECM) packet to the CAM 26 or the smart card interface 32 through the microcomputer 34 and the controller 28. DE-MUX 24 that receives a control word (CW), which is a random number generated value decoded in the CAM 26 or the smart card interface 32, through the microcomputer 34 and the controller 28. Descrambles the EMM packet and the ECM packet using a control word which is a descramble key, and decodes the stream into the stream of the original broadcast signal.

The CAM 26 communicates with the microcomputer 34 through the controller 28 when the PCMCIA module, which is a PC card equipped with a CAS function capable of watching pay channel broadcasting, is inserted into the CI slot of the broadcast receiver.

The smart card interface 22 communicates with the microcomputer 34 through the controller 28 when the smart cards 30 equipped with the CAS function capable of watching pay channel broadcasting are inserted into the CAS slot.

The microcomputer 34 controls internal components of the broadcast receiver, which is a set-top box, and communicates with the controller 28 to detect whether the CAM 26 / smart card interface 32 is attached or detached. The microcomputer 34 demuxes the bit stream of the tuned broadcast channel by tuning (tuning) any one of satellite channels, terrestrial broadcasts, and cable broadcasts according to the key signal input from the key input unit 36. MUX) 24 to control parsing into video, audio, and the like.

The key input unit 36 is a portion for receiving a key signal for operating the broadcast receiver or receiving a remote control signal.

The memory 38 stores information on whether a control word used for descrambling pay channel broadcasting is transmitted in a CI or CAS slot, and stores data necessary for controlling the operation of the microcomputer 34.

The audio decoder 40 decodes the audio stream from the broadcast stream delivered from the DE-MUX 24 using an MPEG decompression algorithm, and then outputs the audio stream to a speaker or an audio amplifier of a television.

The video decoder 42 decodes the video stream from the broadcast stream delivered from the DE-MUX 24 with an MPEG decompression algorithm and then outputs it to a monitor of a television.

The reception limiting device for pay channel broadcasting in the conventional broadcasting receiver configured as described above includes a satellite broadcasting, a terrestrial broadcasting, or a cable broadcasting received at the satellite broadcasting tuner 14, the terrestrial broadcasting tuner 16, and the network connection unit 22, respectively. When the channel of the pay channel broadcasts, the control word (CW), which is a random number generation value decoded through the smart card 30 inserted in the CAM 26 or the smart card interface 32, is extracted, and the demux (DE-MUX). (24) to descramble the EMM packet and the ECM packet in the bit stream of the satellite broadcast, terrestrial broadcast, or cable broadcast channel into a control word (CW) and decode the bit stream of the original broadcast signal. The audio stream of the broadcast stream delivered from the DE-MUX 24 is decoded by the MPEG decompression algorithm through the audio decoder 40 and then output to the speaker or audio amplifier of the television. The video stream of the broadcast stream delivered from the DE-MUX 24 is decoded by the MPEG decompression algorithm through the video decoder 42 and then output to the monitor of a television.

However, the reception limiter for pay channel broadcasting in the conventional broadcast receiver requires a CAM 26 or a smart card 30 for generating only the control word CW of the corresponding channel in order to watch each pay channel broadcast. Do. For example, to watch a paid channel broadcast of MediaGuard, the MediaGuard CAM 26 or smart card 30 was required. Also, even in the same broadcast, the current trend is to classify the types of the CAM 26 and the smart card 30 in different versions, such as irdeto1 and irdeto2, according to their broadcast grades.

Therefore, in order to watch all paid channels through the broadcast receiver of the prior art, it is necessary to have a CAM and a smart card of all broadcasting companies, but it is a problem that a high cost is required to upgrade the version of the CAM and the smart card that changes from time to time. there was.

Summary of the Invention An object of the present invention is to solve the above problems of the prior art, and includes a single module in which a plurality of CAMs and descrambling software for a smart card are stored in a broadcast receiver and a CAM and a smart card through a received broadcast channel. An object of the present invention is to provide a reception limiter for pay channel broadcasting in a broadcast receiver capable of upgrading a version of the service.

Another object of the present invention is to store a plurality of descrambling software for a CAM and a smart card in one module in a broadcast receiver, and to upgrade the version of the descrambling software for the CAM and smart card of a received pay channel. The present invention provides a control method of a reception limiter for a pay channel broadcast in a broadcast receiver that can reduce the cost of paying for a CAM and a smart card.

In order to achieve the above object, the present invention relates to a reception limiter for pay channel broadcasting in a broadcast receiver for decoding and outputting a bit stream of a received pay channel broadcast into video and audio data, and tuning and demodulating the received channel broadcast. Tuner and demodulator, a multi-CAM / smart card module for storing software of a plurality of CAMs and smart cards for descrambling pay channel broadcasts among the received channel broadcasts in one module, and the received channel broadcasts for pay channel In the case of a broadcast, a demux for descrambles a bit stream of a pay channel broadcast by decrypting the EMM packet and the ECM packet of the bit stream of the pay channel broadcast with a control word (CW) which is an encrypted random number generation value, and a control word of the pay channel broadcast. Add descrambling software to create (CW) from Multi CAM / Smart Card Module The controller generates the control word of the pay channel broadcast in the descrambling software, and the pay channel broadcast of the demux is the channel broadcast of the descrambling software already stored in the multi-CAM / smart card module, and the software does not meet the preset conditions. It includes a microcomputer that downloads a corresponding version of descrambling software through a preset broadcast channel through a tuner, a demodulator, and a demux and stores it in a multi CAM / smart card module.

According to an aspect of the present invention, there is provided a method of decoding and outputting a bit stream of a received pay channel broadcast into video and audio data, the method comprising: tuning and demodulating the paid channel broadcast in a broadcast receiver; Determining whether the broadcast is a channel broadcast of software for descrambling the pre-stored pay channel; and if the pay channel broadcast is a pre-stored channel broadcast, checking whether the software for descrambling the pay channel broadcast meets a predetermined condition. And if the software does not meet the preset conditions, downloading and storing the corresponding version of the descrambling software through a preset broadcast channel through a tuner, a demodulator, and a demux, and downloading the descrambling software. Cancer of pay channel broadcasting in Generating a control word (CW), which is a random number generation value for deciphering, decoding the bit stream of pay channel broadcasting with the control word, descrambles it, and then decodes and outputs the video and audio data.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

2 is a block diagram showing a reception limiter for pay channel broadcasting in a broadcast receiver according to the present invention.

Referring to FIG. 2, the reception limiter for pay channel broadcasting in a broadcast receiver according to the present invention includes an antenna (100, 102), a satellite broadcast and terrestrial broadcast tuner (104, 106), a demodulator (108, 110), a network. Connector 112, DE-MUX 114, microcomputer 116, network connector 118, multi-CAM / smart card module 120, controller 122, key input unit 124, memory ( 126, audio decoder 128, video decoder 130, and the like. Although not shown, reference numeral 200 denotes an authentication / payment server connected to the network connection 118 of the broadcast receiver via a wired or wireless network.

The satellite broadcast tuner 104 and the terrestrial broadcast tuner 106 receive signals transmitted from the respective antennas 100 and 102 to remove noise and convert them into frequency bands that can be processed by a broadcast receiver which is a set-top box. Only an arbitrary broadcast channel is selected and amplified from the signals provided from the.

The demodulators 108 and 110 frequency convert the transponders including the corresponding satellite and terrestrial broadcast channels respectively received by the satellite broadcast tuner 104 and the terrestrial broadcast tuner 106 to the baseband, and originally broadcast them using QPSK. The frequency of the channel is demodulated and passed to the DE-MUX 114.

The network connection unit 112 receives the cable broadcast and transmits the channel frequency of the cable broadcast to the DE-MUX 114.

If the satellite broadcasting channel, the terrestrial broadcasting channel, or the cable broadcasting channel is a free channel broadcast, the DE-MUX 114 descrambles the bit stream of the corresponding broadcast signal and decodes it into the original broadcast signal, and then decodes it into an audio decoder 128. ) And video decoder 130.

The DE-MUX 114 of the present invention controls the controller 122 to control word (CW) of the broadcast signal of the pay channel when the satellite broadcast channel, the terrestrial broadcast channel, or the cable broadcast channel is the broadcast of the pay channel. Decode and descramble the bit stream of the pay channel broadcast by using this to decode the stream of the original broadcast signal and delivers it to the audio decoder 128 and the video decoder 130.

The microcomputer 116 controls internal components of the broadcast receiver, which is a set-top box, and tunes (tunes) any one broadcast channel among satellite broadcasting, terrestrial broadcasting, and cable broadcasting according to the key signal input from the key input unit 124. The bit stream of the broadcast channel is parsed as video, audio, etc. through the DE-MUX 114.

The microcomputer 116 of the present invention determines whether the paid channel is a broadcast channel stored in the multi-CAM / smart card module 120 when the demuxed broadcast channel is a paid channel in the DE-MUX 114, In the case of a previously stored broadcast channel, the version of the descrambling software stored in the module 120 is checked and if the version is not correct, the satellite broadcast, terrestrial broadcast, and cable are processed after authentication and payment processing through the server 200 connected through the network. The descrambling software of the corresponding version is downloaded from one of the broadcast channels, and the software stored in the multi-CAM / smart card module 120 is updated and stored. In addition, the microcomputer 116 generates a control word (CW) which is an updated version or a random number generated by the descrambling software of the corresponding version through the controller 122 and de-mux (DE-MUX) 114. It transmits to and decodes the bit stream of the pay channel broadcast using this to decode and descrambles the stream of the original broadcast signal.

The network connection unit 118 is connected to the authentication / payment server 200 via wired or wireless Internet to authenticate data for downloading descrambling software for generating a control word necessary for decrypting encrypted values of various pay channel broadcasts. , Transmit payment processing data.

The multi CAM / smart card module 120 descrambles broadcasts of pay channels downloaded from any one of satellite broadcasts, terrestrial broadcasts, and cable broadcasts received through the tuners 104 and 106 and the network connection unit 112. It stores the CAM or smart card type descrambling software. For example, the multi CAM / smart card module 120 is composed of a memory such as a flash.

The controller 122 receives the software for descrambling the EMM packet and the ECM packet of any paid channel delivered from the DE-MUX 114 from the multi CAM / smart card module 120. The scrambling software generates a control word and passes it to the DE-MUX 114. If the version of the CAM or smart card descrambling software for the pay channel does not match, satellite broadcasting, terrestrial broadcasting, and cable broadcasting through the tuners 104 and 106 and the network connection 112 under the control of the microcomputer 116. Tuning (tuning) of any one of the broadcast channel to download the descrambling software of the version of the CAM or smart card is stored in the multi-CAM / smart card module 120 through the controller 122.

The key input unit 124 is a portion for receiving a key signal for operating the broadcast receiver or receiving a remote control signal.

The memory 126 stores control word information used for descrambling pay channel broadcasting, and stores data necessary for controlling the operation of the microcomputer 116.

The audio decoder 128 decodes the audio stream from the broadcast stream delivered from the DE-MUX 114 with an MPEG decompression algorithm, and then outputs the audio stream to a speaker or an audio amplifier of a television.

The video decoder 130 decodes the video stream from the broadcast stream delivered from the DE-MUX 114 with an MPEG decompression algorithm, and then outputs the video stream to a monitor of a television.

3 is a flowchart sequentially illustrating a control method of a reception limiter for pay channel broadcasting in a broadcast receiver according to the present invention.

2 and 3, the reception limiter for pay channel broadcasting in the broadcast receiver according to the present invention operates as follows.

First, when a key signal for tuning (tuning) an arbitrary broadcast channel is input from the key input unit 124 in the broadcast receiver of the present invention, the microcomputer 116 is a satellite broadcast tuner 104 and a terrestrial broadcast tuner 106. In addition, the network connection unit 112 receives satellite broadcast, terrestrial broadcast, or cable broadcast, respectively, and demodulates it.

The microcomputer 116 demuxes the broadcast channel received through the DE-MUX 114 and determines whether the bit stream of the demuxed broadcast channel is a pay channel (S104).

As a result of the determination, when the demuxed broadcast channel is the pay channel broadcast signal, the microcomputer 116 stores the demuxed pay channel through the DE-MUX 114 in the multi-CAM / smart card module 120. It is determined whether the broadcast channel (S106).

If the S106 determines that the demuxed pay channel is not a broadcast channel of the descrambling software pre-stored in the multi CAM / smart card module 120, the microcomputer 116 decodes the broadcast of the pay channel. Check the version of the screen, and generate an OSD screen inquiring whether to download the software through the OSD or the like and output it to the monitor of the television. (S108-S110)

As a result of the determination in S110, when a key signal for downloading the descrambling software of the pay channel is input from the key input unit 124, the microcomputer 116 connects to the network connection unit 118 for the authentication / payment server of the wired / wireless Internet. ) To perform the authentication and payment processing for downloading the descrambling software for generating the control word necessary to decrypt the encrypted values of the various pay channel broadcasts.

After the payment processing of the server 200 is completed, the microcomputer 116 tunes (selects) any broadcast channel among satellite broadcasts, terrestrial broadcasts, and cable broadcasts through the tuners 104 and 106 and the network connection unit 112. Download the descrambling software of the correct version of the CAM or smart card and store it in the multi-CAM / smart card module 120 through the DE-MUX 114 and the controller 122 (S114).

The microcomputer 116 uses the descrambling software of the CAM or smart card stored in the multi-CAM / smart card module 120 through the controller 122 to generate the encrypted random number generation value of the EEM packet and the ECM packet in the pay channel. Generate an award CW (S116).

The microcomputer 116 transmits the control word CW generated by the controller 122 to the DE-MUX 114, and decodes the bit stream of the pay channel broadcast by using the same. As a result, the stream of the original broadcast signal is decoded.

The microcomputer 116 decodes the audio stream of the broadcast stream delivered from the DE-MUX 114 through the audio decoder 128 with an MPEG decompression algorithm, and then outputs it to a speaker or an audio amplifier of a television. At the same time, the video stream transmitted from the DE-MUX 114 through the video decoder 130 is decoded by the MPEG decompression algorithm and then output to the monitor of the television (S120 to S122).

If the S106 determines that the demuxed pay channel is a broadcast channel of the descrambling software pre-stored in the multi-CAM / smart card module 120, the microcomputer 116 may use the software to descramble the broadcast of the pay channel. Check the version (S124).

As a result of the S124 version check, the microcomputer 116 determines whether the software version for descrambling the pay channel broadcast and the descrambling software version pre-stored in the multi-CAM / smart card module 120 match each other (S126).

If the two versions do not match, as a result of the determination of S126, the microcomputer 116 generates an OSD screen inquiring whether to download the software through the OSD and outputs it to the monitor of the television.

As a result of the determination of S128, when a key signal for downloading the descrambling software of the pay channel is input from the key input unit 124, the microcomputer 116 connects to the network connection unit 118 for the authentication / payment server 200 for wired and wireless Internet. ) To perform the authentication and payment processing for downloading the descrambling software for generating the control word necessary to decrypt the encrypted values of the various pay channel broadcasts.

After the payment processing of the server 200 is completed, the microcomputer 116 tunes (selects) any broadcast channel among satellite broadcasts, terrestrial broadcasts, and cable broadcasts through the tuners 104 and 106 and the network connection unit 112. Download the descrambling software of the correct version of the CAM or smart card and store it in the multi-CAM / smart card module 120 through the DE-MUX 114 and the controller 122 (S132).

The microcomputer 116 may be an encrypted random number generation value of the EEM packet and the ECM packet in the pay channel using the descrambling software of the CAM or smart card stored in the multi-CAM / smart card module 120 through the controller 122. The control word CW is generated (S134).

The microcomputer 116 transmits the control word CW generated by the controller 122 to the DE-MUX 114, and uses the device to decode the bit stream of the pay channel broadcast using the same. Scrambling to decode the stream of the original broadcast signal (S136).

The microcomputer 116 decodes the audio stream of the broadcast stream delivered from the DE-MUX 114 through the audio decoder 128 with an MPEG decompression algorithm, and then outputs it to a speaker or an audio amplifier of a television. At the same time, the video stream transmitted from the DE-MUX 114 through the video decoder 130 is decoded by the MPEG decompression algorithm, and then output to the monitor of the television (S138 to S140).

If it is determined in S126 that the software version for descrambling the pay channel broadcast and the descrambling software version pre-stored in the multi CAM / smart card module 120 match each other, the microcomputer 126 may control the control word of step S134 ( From the step of generating CW).

As described above, the present invention stores a plurality of descrambling software for CAM and smart card in one module in a broadcast receiver, and provides a version of the descrambling software for CAM and smart card through a broadcast channel received through a tuner. By upgrading and paying for the server connected through the network during the version upgrade, the cost of buying or upgrading the CAM and smart card to watch the paid broadcasting channel of the desired broadcasting company can be greatly reduced.

On the other hand, although the present invention only checks the version of the descrambling software in the above embodiment, those skilled in the art can not only check the expiration date of the descrambling software, but also those skilled in the art within the spirit and scope of the present invention described in the claims below. Many variations are possible.

Claims (8)

A reception limiter for pay channel broadcasting in a broadcast receiver for decoding and outputting a received bit stream of pay channel broadcasting into video and audio data, A tuner and a demodulator for tuning and demodulating the received channel broadcast; A multi CAM / smart card module for storing software of a plurality of CAMs and smart cards for descrambling pay channel broadcasts among the received channel broadcasts in one module; When the received channel broadcast is a pay channel broadcast, the EMM packet and the ECM packet of the bit stream of the pay channel broadcast are decoded by a control word (CW), which is an encrypted random number generation value, to descramble the bit stream of the pay channel broadcast. Mux, A controller for extracting the descrambling software for generating the control word (CW) of the pay channel broadcasting from the multi CAM / smart card module and generating the control word for the pay channel broadcasting with the descrambling software; The paid channel broadcast of the demux is a channel broadcast of the descrambling software pre-stored in the multi CAM / smart card module, and if a predetermined condition of the corresponding software is not met, the preset broadcast channel through the tuner, the demodulator, and the demux is used. Download the version of the descrambling software via the microcomputer and save it in the Multi CAM / Smart Card Module. Receiving device for a paid channel broadcast in a broadcast receiver comprising a. The method of claim 1, The microcomputer, If the paid channel broadcast of the demux is not a channel broadcast of the descrambling software previously stored in the multi-CAM / smart card module, the corresponding descrambling software is downloaded through a preset broadcast channel through the tuner, the demodulator, and the demux. Receiving device for pay channel broadcast in a broadcast receiver, characterized in that for storing it in the multi-CAM / smart card module. The method according to claim 1 or 2, The device, Before downloading the descrambling software, the pay channel broadcasting for the broadcast receiver further comprises a network connection for connecting the microcomputer and the server through a wired or wireless network to perform authentication and payment processing of the broadcast receiver. Restriction device. The method of claim 1, The set condition is, And a valid period or a version of the descrambling software. A method of decoding and outputting a bit stream of a received pay channel broadcast into video and audio data, Tuning and demodulating the paid channel broadcast in the broadcast receiver; Determining whether the paid channel broadcast is a channel broadcast of software for descrambling the previously stored pay channel; If it is determined that the pay channel broadcast is a pre-stored channel broadcast, checking whether software for descrambling the pay channel broadcast meets a preset condition; If it is determined that the software does not meet a preset condition, downloading and storing a corresponding version of the descrambling software through a preset broadcast channel through the tuner, the demodulator, and the demux; Generating a control word (CW) which is a random number generation value for decrypting the pay channel broadcast in the downloaded descrambling software; Decrypting and decoding the bit stream of the pay channel broadcast with the control word, and then decoding and outputting the video and audio data Control method of the reception limiter for pay channel broadcasting in a broadcast receiver comprising a. The method of claim 5, The method, Determining whether the pay channel broadcast is a download request of software for descrambling the pay channel broadcast when the pay channel broadcast is not a previously stored channel broadcast; As a result of the check, when the broadcast receiver requests the download of the descrambling software, downloading and storing a corresponding version of the descrambling software through a preset broadcast channel through the tuner, the demodulator, and the demux; Generating a control word (CW) which is a random number generation value for decrypting the pay channel broadcast in the downloaded descrambling software; Decrypting and decoding the bit stream of the pay channel broadcast with the control word, and then decoding and outputting the video and audio data The control method of the reception limiter for pay channel broadcasting in the broadcast receiver further comprising a. The method of claim 5, The method, Generating a control word (CW) that is a random number generation value for decrypting the pay channel broadcast in the pre-stored descrambling software when the software for descrambling the pay channel broadcast meets a predetermined condition; Decrypting and decoding the bit stream of the pay channel broadcast with the control word, and then decoding and outputting the video and audio data The control method of the reception limiter for pay channel broadcasting in the broadcast receiver further comprising a. The method according to claim 5 or 7, The set condition is, And a validity period or a version of the descrambling software.

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