KR20110007398A - Method and apparatus for simultaneously watching and recording paid broadcasting channels - Google Patents

Abstract

Provided are a method and an apparatus for simultaneously providing a viewing and recording of a pay broadcasting channel. A method of simultaneously providing a viewing and recording of a pay broadcasting channel to which a reception limit function is applied may include: (a) a plurality of contents scrambled with a control word (CW) and a plurality of contents, respectively, in response to a viewing and recording request from a viewer; Receiving a transport stream comprising a plurality of Entitlement Control Messages (ECMs), (b) separating a first ECM for viewing and a second ECM for recording from the transport stream, and (c) the first ECM Extracting a first CW, descrambling and displaying a first content for viewing among the scrambled content on a screen; and (d) extracting a second CW from the second ECM and recording from the scrambled content. And descrambling and encrypting the second content for storing in the storage.

IPTV, CAS, Pay-TV

Description

METHOD AND APPARATUS FOR PROVIDING CONCURRENTLY PLAYING AND RECORDING PAY-TV PROGRAMS}

The present invention relates to a method and apparatus for providing viewing and recording of a pay broadcasting channel, and more particularly, to a method and apparatus for simultaneously providing viewing and recording of a pay broadcasting channel to which a reception restriction function is applied.

With the spread of the Internet and the development of digital broadcasting technology, the use of two-way broadcasting services provided by high-speed Internet networks is increasing.

Two-way broadcasting service is a service that provides information service, video contents, and broadcasting to two-way broadcasting receivers (eg, IPTV, DMB receivers, set-top boxes, etc.) using high-speed Internet. Various contents and additional services provided by the Internet such as home banking, online games, and MP3 can be provided.

Meanwhile, the two-way broadcast service mainly adopts a conditional access system (CAS), which is a download security solution for selectively providing contents to subscribers. Restriction Control System (CAS) is a system that allows only paid subscribers to watch paid broadcasts, and is a key solution for paid broadcasters such as satellite and cable broadcasts and terrestrial broadcasters that are currently set free but are likely to be paid. .

A general reception restriction system (hereinafter referred to as CAS) is as follows.

When contents such as video, audio, and data are supplied from program providers (PPs), information about the contents is also supplied, and the work on PPV, NVOD, IPPV, relay channel, etc. is scheduled and scheduled through the information. The information and CW (Control Word) information from the scrambler are linked to generate an Entitlement Control Message (ECM) and an Entitlement Management Message (EMM) encrypted by the CAS.

The ECM is a credential control message used for content protection. The ECM generator receives program information and package information from the broadcast schedule generator to generate an ECM. The EMM is an entitlement management message used for subscriber authentication, and the EMM generator generates the EMM by receiving subscriber information and purchase information from the subscriber management system.

The ECM and EMM generated as described above are delivered to the multiplexer, and the video / audio is multiplexed with the compressed stream and sent to the receiver of the home. Decompress / multiplex and encrypt multiplexed video, audio, and data through receiver CA software, which performs authentication and filtering, and mutual authentication between smart cards and receivers, but does not support PPV, NVOD, IPPV, and paid packages. Paid services have restrictions on use depending on the credit card status of the smart card.

Meanwhile, a request for recording a broadcast program to which a reception limit function is applied has been generated in the CAS as described above. Accordingly, in Korean Patent Laid-Open Publication No. 2008-0083874 (a limited reception system-based security system and a method of processing a limited reception service using the same), a schedule after recording a content transmitted through a broadcast channel selected by a subscriber through a subscriber's receiving device is set. Although the technology that can be used during the period has been disclosed, it is possible to record only one channel, and there is a problem in that it is impossible to simultaneously record other channels while watching.

Therefore, among the programs in the same time zone, there is a demand for a method of watching one program in real time and recording another program for later viewing.

In order to solve the above-mentioned problems of the prior art, the present invention provides a method and apparatus for recording a pay channel program in the same time zone to which the reception restriction function is applied, while watching one channel and the other channel.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to achieve the above object, the method for simultaneously providing the viewing and recording of the pay-TV channel to which the reception restriction function according to an aspect of the present invention is applied, (a) according to the viewer's request for viewing and recording, one CW (Control Word) Receiving a transport stream comprising a plurality of content scrambled with a plurality of contents and a plurality of Entitlement Control Messages (ECMs) corresponding to the plurality of contents, and (b) performing a first ECM and recording for viewing in the transport stream. Separating the second ECM for (c) Extracting the CW from the first ECM, and descrambling the first content for viewing of the scrambled content to display on the screen (d) Extracting the CW from the ECM, descrambling and encrypting the second content for recording of the scrambled content, and storing the decoded content in a storage;

In order to achieve the above object, the apparatus for simultaneously providing the viewing and recording of the pay-TV channel to which the reception restriction function is applied according to an aspect of the present invention, scrambling to the first control word (CW) in response to the viewing and recording request of the viewer Stream receiving unit for receiving a transport stream including the first content and the second content scrambled with the second CW, a first entitlement control message (ECM) corresponding to the first content and the second content, and a second ECM, respectively. And a viewing reception limiter configured to extract the first CW from the first ECM to descramble the first content for viewing among the scrambled contents, and extract the second CW from the second ECM to extract the scrambled content. Recording reception limiting unit for descrambling the second content for recording of the content, the display for displaying the descrambled first content on the screen A display unit and an encryption processing unit for displaying the descrambled first content on the screen and encrypting the second content to store in the storage.

In order to achieve the above object, a system for simultaneously providing a viewing and recording of a pay broadcasting channel to which the reception restriction function according to an aspect of the present invention is applied divides the viewing request and the recording request of the user received from the user terminal to limit the corresponding reception. A reception restriction control unit for transmitting the request to the system, a viewing reception restriction system configured to scramble the viewing content selected by the user according to a viewing request of the user to a first CW, and to generate a first ECM corresponding to the viewing content; And a recording reception limiting system for scrambling the user-selected recording content according to a recording request of the second CW and generating a second ECM corresponding to the recording content. Transmitting the viewing content and the recording content to the user terminal. Includes a compression multiplexing system.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It is provided to fully inform the owner of the scope of the invention.

According to one of the problem solving means of the method and apparatus for simultaneously providing the viewing and recording of the pay broadcasting channel according to the present invention, one channel is recorded while watching another pay broadcasting program at the same time with the reception restriction function. can do.

In addition, it can contribute to the creation of new business models of pay-TV.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

For reference, in the entire specification, when a part is "connected" to another part, it is not only "directly connected" but also "electrically connected" with another element in between. Also includes.

Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a diagram illustrating a configuration of an IPTV broadcasting service system according to an embodiment of the present invention.

As shown in FIG. 1, an IPTV broadcasting service system according to an exemplary embodiment of the present invention includes a broadcaster 1000, a headend system 2000, a network 3000, and a user terminal 4000.

In detail, each broadcaster 1000 serves to create, edit, and change content to provide to the headend system 2000. The broadcaster 1000 may include a program provider (PP), a terrestrial wave, or a content provider (CP). In addition, the content provided by the broadcaster 1000 may include existing content and rich content on the Internet.

The headend system 2000 may include a baseband system 2100, a compression multiplexing system 2200, a plurality of conditional access systems (CAS) 2300, a back office system 2400, a monitoring system 2500, A media operation system (MOC) 2600, a subscriber management system 2700, a data broadcasting system 2800, and a return path server system 2900.

The headend system 2000 receives and manages content from the broadcaster 1000 and distributes the content to the user terminal 4000 in response to a request of the user terminal 4000 to provide a broadcast / recording / playback service. Do it.

The received content may include related additional information and an EPG for this additional information.

At this time, the head-end system 2000 allows the user terminal 4000 to simultaneously record other broadcasts broadcasted at the same time while watching the broadcast.

In addition, the head-end system 2000 may include EPG information (PSIP /) including a subscriber concentrator, a broadcast video and audio signal, data broadcasting data, and a program recommendation service menu through a router supporting a multicast routing protocol. PSI / SI information) can be transmitted to IP set-top boxes of multiple subscribers by multicasting.

Referring to the configuration of the head-end system 2000 in detail, the baseband system 2100 receives an MPEG2 broadcast signal from an external program provider (PP) or an analog broadcast signal from terrestrial waves, and receives the received source broadcast signal. Converts into SDI (Serial Digital Interface) signals, synchronizes frames, distributes broadcast video and audio signals from multiple broadcast channels (e.g. 100 channels) via a routine switcher, subtitle generator (CG) and an automatic program controller (APC) to insert at least one of an advertisement, a logo, or a subtitle into the broadcast video and audio signal (signal editing and processing) to the compression multiplexing system 2200. Can transmit

Here, the SDI (Serial Digital Interface) signal is, for example, a digital signal standard having a transmission rate of 270 Mbps, and a composite digital video and four channels of digital audio signals may be mixed.

The baseband system 2100 is basically a tuner for receiving an analog broadcast signal through a receiving device (eg, a DS-3 station, a Yagi antenna, and an IRD) that receives broadcast signals such as a program provider (PP) and terrestrial wave, respectively. (Tuner)), a frame synchronizer for converting and correcting a source signal received from a receiving device into an SDI signal, synchronizing frames, and A connecting / centralizing all broadcast signal channels for operation management. A signal splitter such as a / V router, and a subtitle generator for inserting an advertisement, a logo, and a subtitle into the SDI signal to edit and process the signal.

The compression multiplexing system 2200 uses an A / V encoder (A / V Encoder) for broadcasting video and audio signals (Video, Audio) received from the baseband system 2100 for each broadcasting channel (eg, 100 channels). SDI (Serial Digital Interface) video signal is compressed to H.264, and the audio signal is compressed to MPEG-2 AAC to generate MPEG-2 Transport Stream (hereinafter referred to as TS). Multiplexing data broadcast data and EPG information (PSIP / PSI / SI information) generated by a data encoder and a PSI / SI generator together with MPEG-2 TS signals, which are broadcast video and audio ( After multiplexing, the multiplexed MPEG-2 TS signal can be inputted to a scrambler, encrypted, and finally IP packetized to transmit an IP packetized TS (Transport Stream) broadcast signal. have.

Also, optionally, the reception restriction system 2300 may be used to prevent illegal viewing and illegal copying of program recommended content.

The reception restriction system 2300 performs encryption on a real-time channel and pre-encryption of VOD content, and controls viewing or recording authority. In addition, the reception restriction system 2300 generates a CW (Control Word, hereinafter referred to as CW) for scrambled content provided from the broadcaster 1000, and scrambles the content using the generated CW.

In addition, the reception restriction system 2300 encrypts CW to generate an Entitlement Control Message (ECM) including reception entitlement information for each channel / program, and encrypts the key used to encrypt the ECM for each subscriber. An EMM (Entitlement Management Message) containing the viewing or recording entitlement information is generated.

In the present invention, Simulcrypt including a plurality of the above-described reception limiting system 2300 is applied to the headend system 2000, and the plurality of reception limiting systems include a reception limiting system 2300a for limiting viewing and a reception limiting for recording. Each may be divided into a limiting system 2300b.

At this time, when receiving a viewing and recording request for the content being broadcast in different channels in the same time zone from the user terminal 4000, each reception limiting system (2300a, 2300b) using each CW scrambles the corresponding content respectively. The compression multiplexing system 2200 may include a plurality of ECMs (ECMs for viewing content and ECMs for recording content) and a plurality of contents (viewing content and recording content) scrambled with each CW in the TS together with the user terminal ( 4000).

For reference, the CWs that scramble the viewing content and the recording content may be different from each other, or may be the same, but the present invention will be described in the case of using the different CWs to scramble the viewing content and the recording content.

To this end, a reception restriction control unit 2300c that receives a user's viewing request and a recording request from the user terminal 4000, and transmits them to the reception restriction systems 2300a and 2300b, respectively, is separately provided to the reception restriction system 2300. May be included.

Here, the viewing request and the recording request are requests for contents of different channels that are broadcasting in the same time zone.

For reference, a plurality of EMMs (EMMs for viewing content and EMMs for recording content) may be included in the TS together with the ECM and the scrambled content and transmitted to the user terminal 4000. It may be delivered to).

Hereinafter, the case where the plurality of EMMs are included in the TS and transmitted to the user terminal 4000 will be described.

The detailed configuration of the reception restriction system 2300 will be described later.

The back office system 2400 is a provisioning system and provides a billing processing function for the use of the IPTV program service for each subscriber.

The monitoring system 2500 is a control system. The monitoring system 2500 may monitor a transmission failure of an A / V broadcast signal for IPTV broadcasting, a reception failure by monitoring a downlink of an IPTV headend system, and confirmation of a subtitle.

The media management system 2600 is a system that manages various business process information (program organization information, location information, contract information, product information, etc.) for operating a broadcasting business. The media management system 2600 integrates and manages the information flow through organic coupling with each system in the center of the broadcasting center.

The media management system 2600 manages broadcast program organization information, content and media management information, contract information of a program provider (PP) and a content provider (CP), product information, and manages each system in the center of a broadcasting center. Through organic integration, it can act as a coordinator to manage and manage the flow of information.

In addition, the media management system 2600 includes contract management, media and content metadata management, EPG information acquisition / management as broadcasting schedule information, and real-time broadcasting and VOD in terms of operation. It provides channel organization management, agent management, interworking with each sub-system, VOD catalog creation management, and various product management.In terms of analysis, marketing analysis reporting, delivery such as settlement of CP / CA and subscriber viewing propensity, etc. In terms of broadcasting transmission monitoring, video server transmission management and VOD subscriber authentication, transmission result recording / management for settlement with CP / CA, and data synchronization with each subsystem connected.

The subscriber management system 2700 provides membership registration and termination and member information management for IPTV services.

The data broadcasting system 2800 authors, verifies, organizes, and transmits the data broadcasting data.

The data broadcasting system 2800 may include a Data Agent Manager (PSI) for managing data encoding, a PSI / SI generator (PSI) for generating Program Specific Information / Service Information (SI). / SI Generator), Data Server / Data Encoder for encoding data broadcasting data into broadcast video and audio signals, and Multiplexer Manager for managing multiplexing functions of data into the broadcast video and audio signals Manager) and a scheduler user interface (Scheduler UI).

In addition, the data broadcasting system 2800 is an A / V Encoder for A / V data provided from an A / V server according to the terrestrial Application Configuration Access Protocol (ACAP) data broadcasting standard. Compresses the broadcast video and audio signals by using a data server / data encoder and PSI / SI (Program Specific Information / Service Information), and compresses the compressed video and audio signals from an application by the authoring tool. ) Is multiplexed by a multiplexer together with data broadcasting data and EPG information (PSIP / SI information) generated by the generator to encode and transmit broadcast program data and related information from collection and storage of data broadcasting programs. .

The return path server system 2900 processes bidirectional data by a data provider (DP), provides online bill transfer from the user terminal 4000, usage history / billing interworking processing of bidirectional data, and personalization authentication processing. , And receive bidirectional data for the program recommendation service and transmit the corresponding response data to the user terminal 4000 in unicasting.

The network 3000 receives the content from the headend system 2000 and delivers the received content to the user terminal 4000. The network network 3000 includes a backbone network and an access network, and the access network includes Ethernet, xDSL (ADSL, VDSL), Hybrid Fiber Coaxial Ca (HFC), and Fiber To The Curb), and may be configured in any one topology of a fiber to the home (FTTH) structure.

The user terminal 4000 is an apparatus for using an Internet broadcasting service and generally includes a TV (IPTV) in which an IP STB is embedded, or an IP set-top box (IP STB) and a remote controller connected to a user's TV.

The set top box transmits a user response signal input through the remote controller, for example, a viewing or recording request signal, to the headend system 2000 through a return channel.

Thereafter, the user terminal 4000 receives the TS from the reception limiting system 2300, and separates the header of the TS to extract the EMM and ECM of the content to be watched and the EMM and ECM of the content to be recorded, respectively.

Thereafter, the user terminal 4000 extracts an encryption key of the ECM from the EMM, and obtains a CW from the ECM using the encryption key of the ECM.

The user terminal 4000 may change the scrambled content into clear content by descrambling the content using the acquired CW.

In this case, when the EMM and ECM of the content to be viewed are extracted from the header of the TS, the user terminal 4000 decodes the clear content to display on the screen of the IPTV, and extracts the EMM and ECM of the content to be recorded from the header of the TS. In this case, the user terminal 4000 encrypts the clear content back to the DRM content and stores the clear content in a storage (eg, a hard disk) of the user terminal 4000.

Hereinafter, a detailed configuration of a reception restriction system 2300 according to an embodiment of the present invention will be described with reference to FIG. 2.

2 is a block diagram showing the configuration of a reception restriction system 2300 according to an embodiment of the present invention.

As shown in FIG. 2, the reception limiting system 2300 according to an embodiment of the present invention uses a CW generator 2310, a scrambling unit 2320, an ECM generator 2330, and an EMM generator 2340. This is a component that is commonly included in the parental control system 2300a and the stereoscopic recording system 2300b.

The CW generator 2310 generates a CW for scrambled content provided from the broadcaster 1000, and the scrambling unit 2320 scrambles the content provided from the broadcaster 1000 using CW.

The ECM generator 2330 receives a CW from the CW generator 2310, encrypts the received CW, and generates an ECM including reception qualification information for each channel / program.

The EMM generator 2340 generates an EMM by encrypting a key used to encrypt the ECM. The EMM generation unit 2340 interworks with the subscriber management system 2700 which is in charge of managing subscriber qualifications, and may generate an EMM including the encryption key of the ECM and the viewing qualification information of each subscriber.

Hereinafter, a detailed configuration of the user terminal 4000 according to an embodiment of the present invention will be described with reference to FIG. 3.

3 is a block diagram showing the configuration of a user terminal 4000 according to an embodiment of the present invention.

As shown in FIG. 3, the user terminal 4000 according to an exemplary embodiment of the present invention includes a transport stream (TS) receiver 4100, a job separator 4200, a viewing reception limiter 4300a, and a recording reception restriction. The unit 4300b includes a display unit 4400, an encryption processing unit 4500, and a storage unit 4600.

In detail, each component of the transport stream (TS) receiving unit 4100 is a plurality of contents (viewing contents) scrambled from the headend system 2000 into respective control words (CWs) in response to a viewer's viewing and recording request. And a plurality of ECMs (ECMs for viewing content and ECMs for recording contents) corresponding to the plurality of contents, and a plurality of EMMs (EMMs for viewing content and recording contents respectively) corresponding to the plurality of contents, respectively. Receive a TS including the EMM).

In this case, the viewing and recording request of the viewer is a viewing request and a recording request for content of different channels that are being broadcast in the same time zone.

The job separator 4200 separates the EMM and the ECM for the watch content and the EMM and the ECM for the recorded content from the header of the TS received by the transport stream (TS) receiver 4100, respectively.

Thereafter, the job separation unit 4200 transmits the EMM and the ECM for the viewing content to the viewing reception limiting unit 4300a, and the EMM and the ECM for the recording content to the recording reception limiting unit 4300b, respectively.

The viewing reception limiting unit 4300a and the recording reception limiting unit 4300b commonly include an EMM decoding unit 4210, an ECM decoding unit 4220, and a descrambling unit 4230.

The EMM decryption unit 4210 extracts the ECM encryption key from the EMM transmitted from the job separation unit 4200, and the ECM decryption unit 4220 obtains the CW from the ECM using the encryption key of the ECM.

The descrambling unit 4230 changes the scrambled content to clear content by descrambling the content using CW.

The display unit 4400 decodes the viewing content changed to the clear content by the viewing reception limiting unit 4300a and displays it on the screen.

The encryption processing unit 4500 encrypts the recorded content changed to the clear content by the recording reception limiting unit 4300b as the DRM content and stores the stored content in the storage unit 4600, and the user stores the storage unit 4600 when the content currently being viewed is ended later. You can watch the recorded content stored in.

As described above, the operation of displaying the viewing content on the screen and the operation of storing the recorded content encrypted with the DRM content are performed by using a plurality of reception limiting units (viewing reception limiting unit and recording reception limiting unit) in the user terminal 4000. All of them can be done at the same time because they are included.

For reference, components shown in FIGS. 2 and 3 according to an embodiment of the present invention mean software components or hardware components such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and have a predetermined role. Perform them.

However, 'components' are not meant to be limited to software or hardware, and each component may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors.

Thus, as an example, a component may include components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and subs. Routines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.

Components and the functionality provided within those components may be combined into a smaller number of components or further separated into additional components.

4 is a flowchart illustrating a process of simultaneously providing a viewing and recording of a pay broadcasting channel to which a reception limit function is applied in a headend system according to an embodiment of the present invention.

The headend system 2000 receives a user's viewing request and a recording request from the user terminal 4000 (S401).

After step S401, the headend system 2000 divides the received request into a viewing request and a recording request, respectively (S402).

After step S402, the head-end system 2000 requests viewing of the content selected by the viewer from the reception restriction system in charge of viewing, and requests recording of the content selected by the viewer in the reception restriction system in charge of recording, respectively ( S403).

For reference, in the exemplary embodiment of the present invention, for convenience of description, the viewing request and the recording request are described as if they are performed simultaneously, but the recording request may be made after the viewing request is preceded, and the viewing request is made after the recording request is preceded. It may be done.

After step S403, each reception restriction system scrambles the corresponding content using each CW. In addition, each reception restriction system encrypts the CW to generate an ECM including the reception qualification information for each channel / program, and encrypts the key used to encrypt the ECM to generate an EMM including the viewing or recording qualification information for each subscriber. (S404).

After step S404, the headend system 2000 is scrambled with a plurality of EMMs (EMMs for viewing content and EMMs for recording content), a plurality of ECMs (ECMs for viewing content and ECMs for recording content) and each CW. A plurality of contents (viewing contents and recorded contents) are included in the TS and transmitted to the user terminal 4000 (S405).

5 is a flowchart illustrating a process of simultaneously providing a viewing and recording of a pay broadcasting channel to which a reception restriction function is applied in a user terminal according to an embodiment of the present invention.

The transport stream (TS) receiving unit 4100 receives a plurality of contents (viewing contents and recording contents) and a plurality of contents scrambled from the headend system 2000 according to a viewer's request for viewing and recording. Receive a TS comprising a plurality of corresponding ECMs (ECMs for viewing content and ECMs for recorded content) and a plurality of EMMs (EMMs for viewing content and EMMs for recorded content) respectively corresponding to the plurality of contents. (S501).

After step S501, the job separator 4200 separates the EMM and the ECM for the viewing content and the EMM and the ECM for the recorded content from the header of the TS received by the transport stream (TS) receiving unit 4100 (S502).

Thereafter, the job separation unit 4200 transmits the EMM and the ECM for the viewing content to the viewing reception limiting unit 4300a, and the EMM and the ECM for the recording content to the recording reception limiting unit 4300b, respectively (S503).

After step S503, the EMM decryption unit 4210 of each reception limiter 4300a and 4300b extracts an ECM encryption key from the EMM transmitted from the job separation unit 4200, and the ECM decryption unit 4220 encrypts the ECM. The CW is obtained from the ECM using the key (S504).

After step S504, the descrambling unit 4230 changes the scrambled content to clear content by descrambling the content using CW (S505).

After operation S505, the display unit 4400 decodes the viewing content changed to the clear content by the viewing reception limiting unit 4300a and displays it on the screen (S506).

After step S505, the encryption processing unit 4500 encrypts the recording content changed to the clear content in the recording reception limiting unit 4300b as the DRM content and stores it in the storage unit 4600 (S506).

The user may watch the recorded content stored in the storage unit 4600 when the content currently being viewed is ended later.

As described above, the present invention includes a plurality of reception limiting units in the set-top box so that the viewing content is displayed on the screen and the recording content is encrypted with the DRM content and stored in the storage unit at the same time (S506). Can be.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a diagram illustrating a configuration of an IPTV broadcasting service system according to an embodiment of the present invention.

2 is a block diagram showing the configuration of a reception restriction system according to an embodiment of the present invention.

3 is a block diagram showing the configuration of a user terminal according to an embodiment of the present invention.

4 is a flowchart illustrating a process of simultaneously providing a viewing and recording of a pay broadcasting channel to which a reception limit function is applied in a headend system according to an embodiment of the present invention.

5 is a flowchart illustrating a process of simultaneously providing a viewing and recording of a pay broadcasting channel to which a reception restriction function is applied in a user terminal according to an embodiment of the present invention.

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

4100: transport stream receiver

4200: job separation

4300a: viewing reception limiting unit 4300b: recording reception limiting unit

4400: display unit

4500 encryption unit 4600 storage unit

Claims (7)

In the method for simultaneously providing the viewing and recording of the paid broadcast channel with the reception restriction function, (a) receiving a transport stream including a plurality of contents scrambled with a control word (CW) and a plurality of Entitlement Control Messages (ECMs) corresponding to the plurality of contents according to a viewer's request for viewing and recording, (b) separating a first ECM for viewing and a second ECM for recording in the transport stream, (c) extracting a first CW from the first ECM to descramble the first content for viewing among the scrambled content; (d) extracting a second CW from the second ECM to descramble the second content for recording of the scrambled content; and (e) encrypting and storing the descrambled second content while displaying the descrambled first content on a screen; The viewing and recording method of the pay-TV channel to which the reception restriction function is applied. The method of claim 1, The transport stream further includes a plurality of Entitlement Management Messages (EMM) corresponding to the plurality of contents, respectively. In the device that provides simultaneous viewing and recording of the pay broadcasting channel with the reception restriction function, According to the viewer's request for viewing and recording, the first content scrambled with the first control word (CW) and the second content scrambled with the second CW, the first content corresponding to the first content and the second content, respectively. A transport stream receiver for receiving a transport stream including a control message) and a second ECM; A viewing reception restriction unit configured to extract the first CW from the first ECM and descramble the first content for viewing among the scrambled contents; A recording reception limiting unit configured to extract the second CW from the second ECM and descramble the second content for recording among the scrambled contents; A display unit configured to display the descrambled first content on a screen; An encryption processing unit for displaying the descrambled first content and encrypting the second content and storing the decoded first content in a storage; Apparatus for viewing and recording a paid broadcast channel to which the reception restriction function is applied. The method of claim 1, The job separation unit extracts the first ECM for viewing from the transport stream and transmits the first ECM to the viewing reception limiting unit, and simultaneously extracts the second ECM for recording from the transport stream and sends it to the recording reception limiting unit. Further comprising, the viewing and recording device of the pay broadcasting channel to which the reception restriction function is applied. In the system that provides simultaneous viewing and recording of the pay broadcasting channel to which the reception restriction function is applied, A reception restriction control unit for classifying a viewing request and a recording request of a user received from a user terminal and transmitting the requests to a corresponding reception restriction system; A viewing reception restriction system that scrambles the viewing content selected by the user in a first CW according to the viewing request of the user, and generates a first ECM corresponding to the viewing content; A recording reception restriction system configured to scramble the recorded content selected by the user in a second CW according to a recording request of the viewer and to generate a second ECM corresponding to the recorded content; A compression multiplexing system for transmitting the viewing content and the recording content scrambled with the first ECM, the second ECM, and the CW to the user terminal; The system for viewing and recording pay-TV channels to which the reception restriction function is applied. The method of claim 5, The user's viewing request and recording request is a request for content of different channels that are broadcasting in the same time zone, the viewing and recording system of the pay broadcasting channel to which the reception restriction function is applied. The method of claim 5, And the first CW and the second CW are the same.

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