KR100480688B1 - Apparatus and method for receiving satellite broadcating - Google Patents

Abstract

The satellite broadcasting receiver and its method may be equipped with a plurality of smart cards so as to receive a plurality of different limited reception service broadcasts and automatically switch according to a limited reception service broadcast selected by the user to watch each limited reception service broadcast. In the satellite broadcasting receiver having a smart card, a plurality of slots for mounting a plurality of smart cards according to different restricted services, and a smart card mounted in the plurality of slots to the switching control signal And a switching means for switching according to the plurality of slots, and upon initial reset of the smart card mounted in the plurality of slots, a switching control signal is outputted to the switching means to detect and receive a limited reception provider ID from each initialization response (ATR) data. Is compared with the ID of the encrypted data service. It is composed of a control means for outputting a control signal according to the result of the comparison, there is a subject to provide a corresponding satellite broadcast receiving method.

Description

Apparatus and method for receiving satellite broadcating}

The present invention relates to a satellite broadcast system, and more particularly, to a satellite broadcast receiver and a method thereof.

Currently, the Mugunghwa satellite broadcast is currently only an audio / video service.

However, it is no exaggeration to say that the success or failure of the media in the future multimedia era depends on the provision of various services (goods).

Hereinafter, a satellite broadcast receiver according to the prior art will be described with reference to the accompanying drawings.

FIG. 1 is a configuration diagram of a general satellite broadcasting system, FIG. 2A is a configuration diagram of an unsubscribed reception apparatus of a general satellite broadcasting system, and FIG. 2B is a configuration diagram of a subscription reception apparatus of a general satellite broadcasting system. Similarly, the program and data supply unit 1 supplies a broadcast signal including the program and data.

The programs serviced by the broadcast signal supplied from the program and the data supply unit 1 are divided into free, subscription (or PPC; Pay-PerpChannel) and PPV (Pay-Per-View) according to their types. You have to pay as much as the service fee.

The service center 2 then scrambles and outputs the limited reception broadcast service signal among the broadcast signals supplied from the program and data supply unit 1.

That is, the service center 2 encrypts and outputs the user who does not subscribe to the restricted reception broadcast service so that they cannot view it.

The transmitting earth station 3 then modulates the broadcast signal of the program and data supply unit 1 and transmits it to the satellite 5 via the first satellite antenna 4.

Accordingly, when the user tunes the broadcast channel to watch the broadcast, not the limited reception service broadcast, the satellite broadcast receiver 7 receives the broadcast signal transmitted through the satellite 5 through the second satellite antenna 6 to the user. Processes and outputs a broadcast signal according to the selected channel.

In addition, the satellite broadcasting receiver 7 displays the processed broadcast signal on the display unit 8 so that the viewer can watch it.

If the user wears the smart card 9 for watching the limited reception service broadcast and does not subscribe, the display unit 8 may be used even if the user tunes in to the channel for watching the limited reception service broadcast. ) Is not displayed.

That is, the satellite broadcast receiver 7 may decode the scrambling key included in the limited reception service broadcast signal even when the satellite broadcast receiver 7 receives the broadcast signal transmitted through the satellite 5 through the second satellite antenna 6. Since there is no descrambling key, the limited reception service broadcast cannot be displayed.

On the other hand, if the user is equipped with a smart card (9) to watch the limited reception service broadcast and subscribes to viewing, when the user adjusts the channel to watch the limited reception service broadcast, the satellite broadcast receiver (7) is the satellite (5) Receives a broadcast signal transmitted from the) and descrambles the paid broadcast signal scrambled according to the descrambling key of the smart card (9).

In addition, the satellite broadcasting receiver 7 separates the audio / video compressed signal from the descrambled signal, converts the audio / video compressed signal into an analog signal of a TV screen format, and displays it on the display unit 8 as shown in FIG. 2B. You can watch the limited reception service broadcast.

At this time, the smart card 9 stores information corresponding to the limited reception service broadcast when viewing the limited reception service broadcast in an internal memory (not shown) and according to a control signal of the controller (not shown). The modem 10 transmits to a public switched telephone network (PSTN) 11.

Then, the service center 2 receives the signal transmitted from the smart card 9 to the modem 10 and the public telephone network 11 through the Public Switched Data Network (PSDN) 12 and signals the signal. Process and charge the limited reception service broadcast viewing fee.

Meanwhile, FIG. 3 is a flowchart of FIG. 1, which allows the scrambled broadcast signal to be received by the first and second smart cards, and illustrates the conventional European D-MAC scheme.

In the European D-MAC scheme, since the ID for limited reception is not provided, the scrambled key data included in the received broadcast signal is sequentially transmitted to the first and second smart cards up to a predetermined number of repetitions (N). Send it repeatedly until the scrambling key returns.

That is, the scrambling key included in the broadcast signal is sequentially transmitted to the first smart card to check whether the descrambling key is returned, and when the descrambling key is returned, the limited reception service broadcast of the first smart card is displayed.

In addition, if the descrambling key is not returned, it is transmitted to the second smart card to check whether the descrambling key is returned.

That is, when the descrambling key is returned, the screen according to the limited reception service broadcast of the second smart card is displayed.

If the descrambling key is not returned, the process is repeated until the reference number N.

On the other hand, when the reference number N elapses, an error indication that the descrambling key is not returned is displayed.

However, in the satellite broadcasting receiver according to the prior art, when a user applies for a plurality of different restricted reception channels, the user has to replace a smart card for each channel to view it.

Accordingly, the present invention has been made to solve the above problems, and is equipped with a plurality of smart cards to receive a plurality of different limited reception service broadcasts automatically switching according to the limited reception service broadcasts selected by the user, respectively It is an object of the present invention to provide a satellite broadcasting receiver for watching a limited reception service broadcast.

Another object of the present invention is to provide a satellite broadcasting reception method corresponding to the above apparatus.

A feature of the satellite broadcast receiver according to the present invention for achieving the above object is, in the satellite broadcast receiver having a smart card, the switching control signal at the time of initial reset of the smart card mounted in a plurality of slots the switching A control means for outputting to the means, detecting a limited reception provider ID among each initialization response (ATR) data, comparing the received ID with the received ID of the encrypted data service, and outputting a control signal according to the comparison result; It is composed.

A feature of the satellite broadcast receiving method according to the present invention for achieving the above object is, after resetting the smart card mounted in a plurality of slots after storing the limited reception provider ID (ID) of the initialization response (ATR) data If the channel selected by the user is a restricted reception channel, the ID (ID) of the received encrypted data service is detected and the ID of the encrypted data service is compared with the detected encrypted data service ID (ID) and the limited reception provider ID (ID). ID) and the limited reception provider ID (ID) are automatically switched to the same smart card to watch the limited reception service broadcast.

Hereinafter, a satellite broadcast receiver according to the present invention will be described with reference to the accompanying drawings.

4 is a block diagram of a satellite broadcasting receiver according to the present invention, a plurality of slots 110 to which a plurality of smart cards (unsigned) are mounted, and a switching unit 120 for switching the plurality of slots 110. And, upon initial reset of the smart cards mounted in the plurality of slots, a switching control signal is output to the switching unit 120 to detect and receive a limited reception provider ID from each initialization response (ATR) data. A control unit 130 for comparing the ID of the encrypted data service and outputting a control signal according to the comparison result, and a channel decoder for decoding a channel from a satellite transponder signal transmitted from a satellite (not shown). 140, a descrambling unit 150 for descrambling the scrambled data for limited reception of the channel decoded signal in the channel decoder 140, and each of the decoded channels in the decoded channel. A demultiplexer 160 which separates a channel and separates an audio / video signal compressed in a channel descrambled by the descrambling unit 150, and separates the separated audio / video compressed data into original audio / video. An audio / video MPEG decoder 170 extending to a signal and an original audio / video signal extended from the audio / video MPEG decoder 170 to an analog signal of a TV screen format (National Television System) Committee (hereinafter abbreviated as NTSC) decoding unit 180 and the modem 190 for transmitting the usage of the limited reception service recorded in the smart card to the service center (not shown) under the control of the controller 130. It is composed.

The operation of the satellite broadcasting receiver according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, a user mounts a plurality of smart cards into a plurality of slots 110 for viewing a plurality of different limited services, respectively.

Then, the controller 130 controls the switching of each slot 110 through the switching unit 120 to reset the plurality of smart cards installed in the plurality of slots 110 in the plurality of smart cards at initial reset. ID of each limited service provider is detected and stored in each Answer To Reset (ATR) data.

Then, when the user selects a channel to watch, the controller 130 searches whether the selected channel is a restricted reception channel.

Hereinafter, the present invention will be described in detail by dividing into the case of the non-limited reception channel and the limited reception channel.

First, the channel decoder 110 decodes a channel in a satellite transponder signal transmitted from a satellite.

The demultiplexer 140 then separates each channel from the channel decoded by the channel decoder 110.

Accordingly, the control unit 130 outputs a control signal to display the channel selected by the user on the TV, unless the search result limited reception channel.

Then, the demultiplexer 140 separates the audio / video signal of the channel selected by the user from the separated channels according to the control signal of the controller 130, and then uses the NTSC encoder 180 through the audio / video MPEG decoder 170. Will output

Accordingly, the NTSC encoder 180 converts the audio / video signal output through the audio / video MPEG decoder 170 into an analog signal of the screen format of the TV and displays it on the TV.

Meanwhile, if the search result is a restricted reception channel, the controller 130 detects an ID (ID) of the encrypted data service among the channels separated by the demultiplexer 140.

Thereafter, the controller 130 compares the detected ID of the encrypted data service with the ID of the limited reception service provider among prestored ATR data.

As a result of the comparison, if the same ID is present, the controller 130 controls the switching unit 120 to transmit an encryption key to the smart card of the limited reception service provider ID.

Then, the smart card outputs the descrambling key through the switching unit 120 according to the transmitted encryption key.

Accordingly, the controller 130 outputs the descrambling key output from the smart card to the descrambling unit 150.

According to the descrambling key output from the controller 130, the descrambling unit 150 descrambles the scrambled limited reception service broadcast signal among the separated channels.

The demultiplexer 140 then separates and outputs the audio / video compressed signal from the broadcast signal descrambled by the descrambling unit 15.

Accordingly, the audio / video MPEG decoder 170 extends and outputs the audio / video compressed signal of the demultiplexer 140 to the original audio / video signal.

The NTSC encoder 180 then converts the audio / video signal output through the audio / video MPEG decoder 170 into an analog signal of the screen format of the TV and displays it on the TV.

On the other hand, the usage of the limited reception service displayed on the TV is recorded in the smart card and transmitted to the service center (not shown) through the modem 190 according to the control signal of the controller 130.

Accordingly, the service center checks and charges the usage amount transmitted through the modem 190.

After that, when the user changes the channel, the above process is repeated to decode the corresponding channel and display it on the TV.

As described above, the satellite broadcasting receiver according to the present invention is equipped with a plurality of smart cards so as to receive a plurality of different limited reception service broadcasts and automatically switches according to the limited reception service broadcast selected by the user. By allowing the user to watch the reception service broadcast, there is an effect that can provide convenience to the user.

1-Configuration diagram of a general satellite broadcasting system

2a-Configuration diagram of a non-subscribed receiver of a general satellite broadcasting system

2b-Configuration diagram of a subscription receiver of a general satellite broadcasting system

3-Flow chart showing the satellite broadcast reception operation according to the prior art

4-Block diagram of a satellite broadcasting receiver according to the present invention

5-4 flow chart

Explanation of symbols for main parts of the drawings

101: a plurality of slots 120: switching unit

130 control unit 140 channel decoder

150: descrambling unit 160: demultiplexing unit

170: MPEG decoder 180: NTS decoding unit

190: modem

Claims (4)

A plurality of slots for mounting a plurality of smart cards according to different limited services; Switching means for switching smart cards mounted in the plurality of slots according to a switching control signal; A memory for detecting and storing an ID of each limited reception provider among initialization response data upon initial reset of the smart card; And, And control means for outputting the switching control signal according to a comparison result by comparing the stored ID of each limited reception provider with the ID of the transmitted encrypted data service. The method of claim 1, And a modem for transmitting limited reception service usage to a service center according to a control signal of the controller. Resetting a plurality of smart cards installed in the plurality of slots and storing the limited reception provider IDs in each initialization response (ATR) data; If the channel selected by the user is a restricted reception channel, detecting an ID of the received encrypted data service and comparing the ID with the service ID; And, And comparing the ID of the encrypted data service and the ID of the limited reception provider to the same smart card to watch the limited reception service broadcast. The method of claim 3, wherein And repeating the comparing step and the viewing step when the user changes the channel in the viewing step.

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