KR100882508B1 - Receivng apparatus and method for advanced digital multimedia broadcasting conditional access using hierarchical modulation - Google Patents

Abstract

An apparatus and a method for receiving advanced DMB(Digital Multimedia Broadcasting) conditional access by using hierarchical modulation are provided efficiently to charge a user for various services which are transmitted to an enhanced hierarchy when providing a high efficient paid DMB service to the user. A control monitoring unit selects a desired channel in an RF signal inputted through a reception RF(Radio Frequency) unit(S310). The control monitoring unit outputs the selected channel signal to an OFDM demodulator, and demodulates and outputs the channel signal by discriminating an enhanced hierarchy service from a basic hierarchy service based on symbol values which are confirmed at OFDM symbols(S320). A demultiplexer of the basic hierarchy and the enhanced hierarchy demultiplexes and outputs the inputted signal by each hierarchy and parses FIC data and MSC data(S330). An enhanced hierarchy data analyzer, a basic hierarchy data analyzer and a video service stream analyzer determines whether or not the descrambling process is necessary(S340,S350), and a control and monitoring unit determines whether or not the highly qualified service should be provided(S370). If a highly qualified service mode is selected, a synthesizer combines those two hierarchies for providing the selected service well to output a stream by which a highly qualified service is possible(S380).

Description

Evolved DMB limited receiver using hierarchical modulation scheme and method thereof {RECEIVNG APPARATUS AND METHOD FOR ADVANCED DIGITAL MULTIMEDIA BROADCASTING CONDITIONAL ACCESS USING HIERARCHICAL MODULATION}

The present invention relates to a reception device and a method for receiving a reception, and more particularly, to a reception device and a method for receiving reception of a terrestrial DMB providing high quality / high transmission efficiency.

The present invention is derived from the research conducted as part of the IT growth engine technology development project of the Ministry of Information and Communication and the Ministry of Information and Telecommunication Research and Development. [Task Management No .: 2006-S-017-02, Title: Development of Advanced Terrestrial DMB Transmission Technology] .

DMB systems are classified into two types due to their characteristics. That is, satellite DMB and terrestrial DMB.

First, the satellite DMB transmits the program to the satellite in the broadcasting center, the satellite spreads the program to the terminal for receiving DMB through radio waves.

On the other hand, terrestrial DMB transmits a program to a corresponding terminal using a frequency on the ground, and unlike a satellite DMB, a broadcast signal is transmitted through a base station on the ground.

The limited reception of the terrestrial DMB broadcast is based on the ETSI TS 102 367 V1.2.1 standard based on the European Eureka-147 DAB CA standard, which is based on the DMB project group in the Telecommunications Technology Association (TTA). Standardization work was carried out to establish the standard.

Thus, although the limited reception standard of terrestrial DMB broadcasting is currently determined, there is no current limited reception method applied to the DMB service for high quality / high transmission efficiency.

In other words, there is a need for an apparatus and method capable of descrambling respective services in accordance with the structure of an advanced terrestrial DMB receiving system that is changed by pursuing high transmission, high efficiency and high quality.

Accordingly, an aspect of the present invention is to provide an advanced DMB limited reception apparatus and method using a hierarchical modulation scheme capable of providing high quality DMB services in accordance with the structure of an advanced terrestrial DMB receiving system. do.

In addition, the present invention is not only capable of descrambling the entire stream input to the enhancement layer, but also an apparatus and method for enabling descrambling for a desired stream among video, audio, and data services, and a receiving system for conditional access using the same. To provide.

In addition, the present invention provides an advanced DMB limited reception apparatus using a hierarchical modulation scheme that can provide a variety of DMB services by allowing limited reception for video, audio, and data included in a video service, respectively. To provide a method.

An embodiment of the present invention for achieving the above object is a demodulator for demodulating a received signal, a demultiplexer for demultiplexing the demodulated received signal into an enhancement layer stream and a base layer stream, and the enhancement layer A hierarchical modulation scheme including a limited reception data processor for analyzing the high-speed information channel data and the main service channel data of the stream and the base layer stream and descrambles the restricted received stream, and a decoder for decoding the limited reception processor output stream. Provided is an advanced conditional access device for use.

In addition, another embodiment of the present invention is a demultiplexer for demultiplexing the received signal into an enhancement layer and a base layer and the high-speed information channel data of the enhancement layer and the base layer to analyze the limited reception information and the main service channel data A data analysis unit for outputting a data service, a video service stream analysis unit for determining whether to descramble a video service by analyzing the main service channel data output from the data analysis unit, and the high speed information channel data and the main service channel data. Evolution using a hierarchical modulation scheme comprising a limited reception system for outputting a control word based on the analysis result and a descrambling processing unit for performing descrambling on the restricted reception stream using the control word Provides a limited reception device.

Another embodiment of the present invention is to divide and demultiplex a received signal into an enhancement layer signal and a base layer signal, and analyze high-speed information channel data and main service channel data of each of the enhancement layer signal and the base layer signal. Determining whether to descramble the entire service or a part of each of the enhancement layer and the base layer, and descrambling each content included in the video service among the entire service or some of the services of each of the enhancement layer and the base layer. Hierarchical modulation comprising determining whether or not, descrambling the entire service or a part of the service, and descrambling each content included in the video service according to the determination of the descrambling or not. Evolved an advanced conditional access method using Ball.

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According to an exemplary embodiment of the present invention, limited reception is applied to descramble a desired stream among video, audio, and data services input to the enhancement layer and the base layer.

In addition, in the case of a video service, an additional service that enables descrambling of video, audio, and additional data included in the video service may be further provided.

Therefore, when a terrestrial DMB paid service of high quality / efficiency is provided, a business model that can effectively charge various services transmitted to and received by the enhanced layer can be expected.

1 is a block diagram of an advanced DMB conditional access apparatus using a hierarchical modulation scheme according to an embodiment of the present invention.

2 is a block diagram of a limited reception data processing apparatus according to an embodiment of the present invention.

3 is a flowchart illustrating an evolved DMB limited reception method using a hierarchical modulation scheme according to an embodiment of the present invention.

4 is a diagram conceptually illustrating a FIG mapping method according to an exemplary embodiment of the present invention.

5 is a diagram conceptually illustrating a FIG mapping method according to another exemplary embodiment of the present invention.

6 is a flowchart illustrating a DMB restricted reception service method according to an embodiment of the present invention.

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terminology used herein is a term used to properly express a preferred embodiment of the present invention, which may vary according to a user, an operator's intention, or a custom in the field to which the present invention belongs. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

1 is a block diagram of an advanced DMB conditional access apparatus using a hierarchical modulation scheme according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus for receiving DMB restriction includes a demodulator 120, a demultiplexer 130, 140, a limited reception data processor 160, and a decoder 180, 190, 200.

In addition, the DMB limited reception device may further include a reception RF unit 110 for receiving a radio frequency (RF) signal, tuning a frequency, and outputting data of a selected channel.

In this case, the RF signal is classified at least one video, audio, and data services constituting the terrestrial DMB in the base layer and the enhancement layer service at the transmitting end, and then restricted reception for each classified layer or type of service (Conditional Assume that Access is applied.

In addition, the DMB limited reception device may further include a control and monitoring unit 220 for notifying the selected channel to the reception RF unit 110 and controlling the operation of the entire device.

The demodulator (OFDM demodulator) 120 demodulates the received signal. More specifically, the demodulator 120 demodulates data input from the reception RF unit 110 in an orthogonal frequency division multiplexing (OFDM) scheme and outputs the enhanced layer and base layer service signals.

The demultiplexers 130 and 140 demultiplex the demodulated signal into an enhanced layer stream and a base layer stream, and demultiplexes the enhanced layer demultiplexer 140 and the base layer demultiplexer 130. It can be composed of).

The base layer demultiplexer 130 receives a base layer signal from the OFDM demodulator 120 and converts the base layer signal into data of a fast information channel (FIC) and main service channel (MSC) of a sub-channel unit. Output multiplexed.

The enhancement layer demultiplexer 140 receives the enhancement layer signal from the OFDM demodulator 120 and demultiplexes the FIC (Fast Information Channel) and sub-channel MSC (Main Service Channel) data.

According to an embodiment of the present invention, the DMB limited reception device is input from the outer decoder 150A and the base layer demultiplexer 140 which output-decodes and outputs the MSC data input from the enhancement layer demultiplexer 140. It may be configured to further include an external decoder (150B) for externally decoding and outputting the MSC data.

In addition, according to an embodiment of the present invention, the DMB conditional access device may further include a first outer decoder 150a for externally decoding the MSC data parsed from the base layer signal and the MSC data parsed from the enhancement layer signal. It may be configured to further include a second outer decoding unit 150b for external decoding.

The limited reception data processor 160 analyzes data output from the enhancement layer demultiplexer 140 and the base layer demultiplexer 130, and descrambles each or all of the services to enhance and service each layer of the base layer. Output streams separately.

In this case, the limited reception data processing unit 160 may receive a selection signal from the control and monitoring unit 220 to determine whether to descramble the entire content or content of each service.

In this case, the entire service means each of video, audio, and data services of the enhancement layer or a combination thereof. In addition, the content constituting each service means video, audio, and additional data (BIFS: Binary Format for Scenes) included in a video service.

Therefore, according to an embodiment of the present invention, the limited reception may be applied to each of video, audio, and data services, or may be applied to all of them, and may be applied to each content included in the video service.

According to an embodiment of the present invention, the DMB conditional access device further includes a stream synthesis unit 170a, 170b, and 170c which receive a descrambled service stream from the conditional access data processing unit 160, and synthesize and output the stream. Can be.

The stream synthesizer 170a, 170b, 170c performs service stream synthesis for providing a high quality service according to a selection signal input from the control and monitoring unit 220.

More specifically, the stream synthesizers 170a, 170b, and 170c receive the audio service streams of the descrambled enhancement layer and the base layer, and synthesize the streams for high quality service. A second stream synthesizer 170B that receives the scrambled enhancement layer and the base layer video service stream and synthesizes the stream for high quality service; The third stream synthesizer 170C may be configured to receive the data service streams of the descrambled enhancement layer and the base layer and synthesize and output the streams for high quality service.

For example, the operation of the second stream synthesizer 170B for the video stream will be described. For example, the second stream synthesizer 170B may reconstruct the bitstream processed and output by the conditional access data processor 160 to be decodable. do. That is, the second stream synthesizer 170B accesses the bitstream to an AU (Access Unit) so that the decoder defined in SVC (Scalable Video Coding) related standard can decode the video bitstreams of the demultiplexed enhancement layer and the base layer to each layer. It may be a module for reconfiguring.

Further, according to an embodiment of the present invention, the DMB conditional access device is provided from the data service decoder 180 and the second stream synthesizer 170B, which decode and output the data service stream input from the third stream synthesizer 170C. Decode and output the audio service stream input from the video service decoder 190 and the first stream synthesizer 170A which decode and output additional data (BIFS, etc.) including video and audio, which are contents in the input video service stream. The audio service decoder 180 may be further included.

In addition, according to an embodiment of the present invention, the apparatus for receiving DMB restriction may further include a display unit 210 which receives and displays data decoded and output from each service decoder 180, 190, or 200. .

Hereinafter, a detailed configuration and detailed operation of the limited reception data processing unit 160 will be described.

2 is a block diagram of a limited reception data processing apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the limited reception data processor 160 analyzes the FIC data of the enhancement layer to output limited reception information and MSC data, and analyzes and restricts the FIC data of the base layer. The base layer data analyzer 161 outputting the received information and the MSC data, and the MSC data output from the enhancement layer data analyzer 162 and the base layer data analyzer 161 to analyze and descramble the video service. The video service stream analysis unit 164 for determining whether to output the control word based on the analysis result of the FIC data and the MSC data, and the restriction reception system 163 using the control word, It includes a descrambling processing unit 165 that performs descrambling.

According to an exemplary embodiment of the present invention, the base layer data analyzer 161 receives the FIC data of the base layer and performs FIG (Fast Information Group) analysis to perform FIG (Fast Information Group) and MCI ( Multiplexer Configuration Information) may be configured to include an MCI analysis module 162b for performing the analysis and the MSC data processing unit 162c for analyzing and processing the MSC data input to the sub-channel for each service based on the analysis results. .

According to an embodiment of the present invention, the enhancement layer data analyzer 162 receives the FIC data of the base layer and performs FIG (Fast Information Group) analysis to perform FIG (Fast Information Group) and MCI ( Multiplexer Configuration Information) may be configured to include an MCI analysis module 162b for performing the analysis and the MSC data processing unit 162c for analyzing and processing the MSC data input to the sub-channel for each service based on the analysis results. .

According to an exemplary embodiment of the present invention, the video service stream analyzer 164 may exclude a stream for a video service from among streams for each service input from the enhancement layer data analyzer 162 and the base layer data analyzer 161. After decoding, the data is parsed and analyzed for each content (data such as video, audio, BIFS, etc.) and output for descrambling according to each layer.

In this case, each hierarchical data analyzer 161 and 162 has been described as being included in the conditional access data processor 160, but the present invention is not limited thereto.

That is, since the hierarchical data analyzers 161 and 162 perform a function of monitoring a service list and controlling a service in a general receiver, the hierarchical data analyzers 161 and 162 may not be included in the conditional access data processor 160 and may be located at the front end thereof. have.

According to an embodiment of the present invention, the conditional access system 160 decodes the conditional reception information to extract the control word CW and the conditional access message decoder 163b and the extracted control word according to the synchronization parameter. It may be configured to include a synchronization unit 163a for synchronizing and outputting.

As shown in FIG. 2, the conditional access message decoder 163b is configured for the basic, enhanced layer and video services from the basic and enhanced layer data analyzers 161 and 162 and the video service stream analyzer 164. A control word is obtained by decoding the CA message by receiving the CA (EMM, ECM) messages.

In this case, the control word refers to a control word (CW) in a general case, and a control word for a video service in the case of descrambling other contents in the video service.

According to an exemplary embodiment of the present invention, the descramble processing unit 165 may assign a layer or video service to each layer or video service according to a user's selection of the input service stream, that is, whether or not the service determined by the control and monitoring unit 220 is descrambled. Descrambles the control word and outputs the corresponding content.

3 is a flowchart illustrating an evolved DMB limited reception method using a hierarchical modulation scheme according to an embodiment of the present invention.

Referring to FIG. 3, in the DMB limited reception method, a reception channel selection step (S310), a step of dividing and demodulating the received signal of the selected channel into an enhancement layer and a base layer (S320, S330), the enhancement layer signal, and Analyzing the high-speed information channel data and the primary service channel data of each of the base layer signals to determine whether to descramble the entire service or a part of each of the enhancement layer and the base layer (S340), and each of the enhancement layer and the base layer. Determining whether to descramble each content included in a video service among all services or some services in step S350 and descrambling the entire service or some services according to the determination of whether or not to descramble. Performing descrambling on each content included in the video service (S360). It is.

According to an embodiment of the present invention, the step of performing the descrambling (S360), the control word is extracted by decoding the limited reception information included in the received signal, and the extracted control word is synchronized and output according to the synchronization parameter And descrambling the restricted received service stream using the control word.

In step S310, the control and monitoring unit 220 selects a channel corresponding to a channel desired by the user from a radio frequency (RF) signal input through the reception RF unit 110.

In step S320, the selected channel signal is output to the OFDM demodulator 120, and the OFDM demodulator 120 demodulates the signal by dividing the signal into enhancement layer and base layer services based on the symbol value identified in the constellation of the OFDM symbol. To print.

In step S330, the base layer and the enhancement layer demultiplexers 130 and 140 demultiplex the input signal for each layer and output the same, and parse the FIC and MSC data.

The MSC data is generally output in subchannel units. However, according to the demultiplexing scheme, the MSC data may not be output in units of subchannels, and the MSC data is output to the conditional access data processor 160 through the external decoders 150A and 150B for each layer.

In steps S340 and S350, whether to descramble may be determined by the enhancement layer data analyzer 162, the base layer data analyzer 161, and the video service stream analyzer 164. .

That is, each layer data analyzer 161 and 162 analyzes each service through a stream corresponding to each layer input to the conditional access data processor 160.

At this time, the FIC data input to each layer is analyzed for FIG data through the FIG analysis modules 161A and 162A.

The FIG analysis modules 161A and 162A obtain the limited reception related information through the FIG analysis, and the MCI analysis modules 161A and 162B provide information on services, components, and subchannels corresponding to MCI (Multiplexer Configuration Information). Analyze

Here, the MSC data output from the MSC data processing units 161C and 162C is determined by the information analyzed through the above process.

That is, the FIG field is analyzed by analyzing FIG and MCI related to CA, and the CA receives internal message and synchronization parameter of each layer related to CA within MSC data, and service list and CA for each layer service. It can also be checked through the control and monitoring unit 220. After such an analysis process, the control and monitoring unit 220 (or user) decides whether to descramble each of the entire services of the enhancement layer and the base layer first. It determines whether to descramble some services.

Next, to determine whether to descramble video, audio, and data (BIFS, etc.) included in the video service for each layer, MSC data corresponding to the video service is analyzed through the video service analyzer 164.

The result analyzed by the video service analyzer 164 may confirm that limited reception is applied to each content through the control and monitoring analyzer 220, and may determine whether to descramble the identified content.

The limited reception synchronization parameter for the video service and the limited reception internal message, which are limited reception information on the content (video, audio, additional data) included in the video service, are output to the limited reception system 163.

The conditional access system 163 outputs a control word based on the analysis result of the FIC data and the MSC data, and outputs it according to the synchronization parameter.

According to an embodiment of the present invention, the DMB restriction reception method may further include a step S370 of determining whether to provide a high quality service according to the selection of the control and monitoring unit 220.

If the high quality service is selected in the step S370, a synthesizer suitable for the service selected from the synthesizers 170A, 170B, and 170C to provide the selected service combines the two layer services well and outputs the high quality service stream. (S380).

The display unit 210 displays a decoded stream and provides a DMB service to a user (S390).

As described above, the limited reception data processing apparatus and the limited reception method according to the embodiment of the present invention may descramble the classified layer (enhanced layer, base layer) and the type of service, and the service user may desire Optionally, high quality terrestrial DMB is available.

That is, the DMB limited reception method according to an embodiment of the present invention may be classified and classified even when a limited reception is applied to any one or more of a video, audio, and data signal or a limited reception is applied to an entire service signal. Can descramble by layer and type of service.

That is, according to the embodiment of the present invention, not only the entire stream input to the enhancement layer in the DMB system can be descrambled, but also the desired stream among video, audio, and data services can be descrambled. Can meet your needs.

In particular, in the case of a video service, since the video service stream can be analyzed using PSI information used in the prior art to descramble each video, audio, and additional data included in the video service, backward compatibility with the conventional service is provided. Can be maintained.

According to an embodiment of the present invention, the analysis for descrambling of each content included in the video service may use information included in the video stream at the transmitter.

First, in analyzing the video service stream, at least one of a credential control message and a credential management message parsed from the video service stream by the program detail information (PSI) is used.

That is, ECM (Entitlement Control) corresponding to a video service using CAT, which is defined in MPEG-2 system standard, together with PAT (Program Association Table) and PMT (Program Map Table) corresponding to PSI (Program Specification Information). Messages and Entitlement Management Message (EMM) information are parsed using a Packet Identifier (PID), and then transmitted to the CA. The CA receives the control word by decoding the CA. To get.

Next, in analyzing the video service stream, FIG mapping information to which a packet identifier (PID, Packet IDentifier) of the video service stream, EMC, and EMM are mapped is used. In this case, it is assumed that the transmitting end maps the PID of the scrambled content and the information on the limited reception related information (ECM, EMM) to FIG.

Accordingly, the mapping information of FIG used by the transmitter is analyzed by the data analyzers 161 and 162 of each layer, and the analyzed result is transmitted to the descrambler 165 through the controller and the monitor 220 to descramble. Is to make this possible.

Meanwhile, the FIG mapping information may be mapped as shown in FIGS. 4 and 5 at the transmitting end.

4 is a diagram conceptually illustrating a FIG mapping method according to an exemplary embodiment of the present invention.

4 shows an example in which FIG mapping is performed by selecting an extended type of any FIG type that is not currently used. That is, FIG. 4 defines mapping information for the PID of the enhancement layer video service in an arbitrary FIG structure.

5 is a diagram conceptually illustrating a FIG mapping method according to another exemplary embodiment of the present invention.

FIG. 5 shows an example of changing a reserved for future use (Rfu) to an unscrambled video service flag (SVF).

That is, FIG. 5 shows an example in which mapping information about PIDs of the scrambled enhancement layer video service is applied to FIG. 6 used for conventional limited reception.

Accordingly, in the FIG mapping method, since the PID of the scrambled content is known before the video stream is decoded in the FIG Parsing process, the descramble of the video service stream is efficiently performed. Can be.

6 is a flowchart illustrating a DMB restricted reception service method according to an embodiment of the present invention.

Referring to FIG. 6, the method for receiving a DMB restricted reception service may include outputting a service list that can be provided by FIG analysis of an enhancement layer and a base layer signal (S610), and a broadcast service to which priority is given among the output service lists. Providing steps S620 and S630, and descrambles a service stream necessary for providing a high quality service in response to a request for providing a high quality service among the prioritized broadcast service provisions and provides a high quality broadcast service (S630, S640, S650) is configured to include.

In step S610, the hierarchical data analyzers 161 and 162 and the video service stream analyzer 164 output a list of available services.

In step S620, the broadcast service to which priority is given may be a base layer service. However, the present invention is not limited thereto, and some of the enhancement layer services may be provided as basic quality services.

In step S640, when the enhanced layer service (or a high quality service) company is selected from the user, the control and monitoring unit 220 controls to descramble the limited quality of the received high quality service so that the user provides a high quality paid service. I can receive it.

As described above, the service stream required for providing the high quality service may be at least one of video, audio, data service stream, and video, audio, and additional data included in the video service.

Accordingly, according to an embodiment of the present invention, not only can the video, audio, and data streams input to the enhancement layer selected by the user be descrambled, but also the video included in the video service, Limited reception is also possible for audio and additional data (BIFS, etc.).

The method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims (14)

A demodulator for demodulating a received signal; A demultiplexer configured to demultiplex the demodulated received signal into an enhancement layer stream and a base layer stream; A limited reception data processing unit configured to descramble the stream to which the restricted reception is applied by analyzing the fast information channel data and the main service channel data of the enhancement layer stream and the base layer stream; And An advanced restriction receiving apparatus using a hierarchical modulation scheme comprising a decoding unit for decoding the restriction reception processing unit output stream. The method of claim 1, wherein the demultiplexer, A base layer demultiplexer for parsing high-speed information channel and main service channel data from the base layer signal; And And an enhancement layer demultiplexer for parsing high-speed information channel and main service channel data from the enhancement layer signal. The method of claim 2, A first outer decoding unit which outer-decodes main service channel data parsed from the base layer signal; And And a second outer decoding unit configured to outer-decode the main service channel data parsed from the enhancement layer signal. The method of claim 1, wherein the limited reception data processing unit, A data analyzer for analyzing the fast information channel data of the enhancement layer and the base layer to output limited reception information and main service channel data; A video service stream analyzer to determine whether to descramble a video service by analyzing main service channel data output from the data analyzer; And E. The method of claim 4, wherein the limited reception data processing unit, And a descrambling processor configured to perform descrambling on the stream to which the conditional access has been applied using the control word. The method of claim 4, wherein The descrambling of the video service is an advanced restriction receiving apparatus using a hierarchical modulation scheme characterized in that it is determined for each of the video, audio, and additional data services included in the video service as a whole or video services. The method of claim 4, wherein the restriction receiving system, A limited reception message decoding unit decoding the limited reception information and extracting a control word; And And a synchronization unit configured to synchronize and output the extracted control word according to a synchronization parameter. A demultiplexer configured to demultiplex the received signal into an enhancement layer and a base layer; A data analyzer for analyzing the fast information channel data of the enhancement layer and the base layer and outputting limited reception information and main service channel data; A video service stream analyzer to determine whether to descramble a video service by analyzing main service channel data output from the data analyzer; A limited reception system outputting a control word based on an analysis result of the high speed information channel data and the main service channel data; And And a descrambling processor configured to perform descrambling on the stream to which the limited reception is applied using the control word. The method of claim 8, And the limited reception information includes at least one of a credential control message and a credential management message parsed from a video service stream according to program detail information. The method of claim 8, And the limited reception information is obtained by analyzing the fast information group mapping information. The method of claim 10, And the fast information group mapping information defines packet identifier information of a video service in an arbitrary fast information group type. The method of claim 10, The fast information group mapping information is an advanced restriction receiving apparatus using a hierarchical modulation method, characterized in that a field not used for the fast information group 6 type is defined as a scrambled video service flag. Demultiplexing the received signal into an enhancement layer signal and a base layer signal; Analyzing the high-speed information channel data and the main service channel data of each of the enhancement layer signal and the base layer signal to determine whether to descramble all services or some services of each of the enhancement layer and the base layer; Determining whether to descramble each content included in a video service among all services or some services of each of the enhancement layer and the base layer; And According to the determination of descrambling, an evolved limitation using a hierarchical modulation scheme including performing descrambling of all or some of the services and descrambling of each content included in the video service. Receiving method. The method of claim 13, The descrambling may include: Extracting a control word by decoding the limited reception information included in the received signal; Synchronizing and outputting the extracted control word according to a synchronization parameter; And And performing descrambling on the limited reception service stream using the control word.