KR100959533B1 - Broadcasting receiver, method for playing content and recording media for the method - Google Patents

Abstract

Disclosed are a broadcast receiver and a content reproduction method. The network interface transmits and receives data with external resources connected to the network. The user interface receives a content playback request from the user. The control unit downloads the content requested from the user from the external resource, and requests digital copyright authentication for the content downloaded from the external resource while playing the advertisement content. According to the present invention, the digital copyright authentication procedure for the content that is requested to be played by the user during the reproduction of the advertising content is performed, thereby preventing illegal copying and abnormal distribution of the digital content and efficiently interworking with the digital rights management server. In addition, the user can play the content that is requested to be played by the user without delay after the advertisement content is finished playing. Therefore, the user can prevent the user's inconvenience by preventing the video from being displayed on the screen and displaying the black screen during the delay time. It can give the user the same effect as the fast channel switching that can be felt in the existing analog broadcasting receiver, which can increase the user's satisfaction.

Broadcast receiver, content, network, digital copyright, playback

Description

Broadcasting receiver, method for playing content and recording media for the method

The present invention relates to a broadcast receiver and a content playback method, and more particularly, to a broadcast receiver and a content playback method for downloading content from a network, checking a digital copyright license for the downloaded content, and playing the downloaded content. will be.

With the recent trend of digital convergence, expansion of communication network bandwidth, and digitalization of broadcasting, the convergence environment of broadcasting communication has been created, and interest in digital broadcasting is increasing. In particular, the broadcasting market, which relies on the traditional advertising revenue model, is attempting to enter the telecommunications market based on the Triple Play Service (TPS) technology. The situation is causing mutual conflicts.

Internet Protocol Television (IPTV) has emerged as a technological resource in this environment, especially tailored to the interests and business environment of operators. IPTV is a digital convergence form of convergence of broadcast and communication. It is connected to the IP Set Top Box (STB) with the reception of broadcast signals transmitted from a program provider (PP) or terrestrial, cable, and satellite. It provides an Internet Contents On Demand (ICOD) service such as TV Internet contents and video contents (T-VOD) through a high speed Internet network (IP Network) through a connected television set (TV).

IPTV services are called IPTV in the US, ADSL TV in Europe, and broadband broadcasting in Japan.

The main components of the IPTV service system include an IPTV Headend System, an IP Backbone Network, an IP Backbone, an Access Network (eg xDSL, HFC, FTTC, FTTH), and a Subscriber Terminal (STB, TV).

The IPTV service system is a broadband service that provides two-way TV content in the form of convergence of communication and broadcasting in accordance with the digital convergence of the program provider (PP) and the content provider (CP) of the Internet market. A TV connected to an IP set-top box (STB) via a high-speed Internet network receives Internet multimedia contents including audio, video, and packet data, and interactively uses an interactive channel as a return path concept. ) Use a TV service.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a broadcast receiver and a content playback method capable of preventing illegal copying and abnormal distribution of digital content and enabling fast channel switching.

Another technical problem to be achieved by the present invention is to provide a broadcast receiver and a content playback method capable of playing the content without a delay time after the end of the advertisement image.

Another technical problem to be achieved by the present invention is to provide a broadcast receiver and a content playback method efficiently interworking with a digital rights management server in order to prevent content playback delay due to time required for digital copyright authentication of content.

 Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for executing a content reproducing method according to the present invention.

In order to achieve the above technical problem, a broadcast receiver according to the present invention includes a network interface for data communication with an external resource connected to a network; A user interface for receiving a content playback request from a user; And a control unit for downloading the requested content from the external resource and requesting digital copyright authentication for the content while playing the advertisement content.

Preferably, the broadcast receiver according to the present invention is an IPTV, and the external resource is preferably a content server.

The network may be an IP network or a subscriber network or a network in which an IP network and a subscriber network are combined.

Preferably, the controller may request digital copyright authentication by transmitting at least one of a user ID and a device identification value to a digital rights management (DRM) server connected to the network. In addition, the control unit receives the digital copyright certification confirmation of the content, and plays the content of which the authentication is confirmed.

In accordance with another aspect of the present invention, there is provided a content reproduction method, comprising: downloading content from an external resource connected to a network; Displaying the advertising content; Transmitting authentication request information for digital copyright authentication of the downloaded content to a digital rights management (DRM) server connected to the network; And when the authentication confirmation information is received from the digital rights management (DRM) server, terminating the reproduction of the advertisement content and playing the content whose authentication is confirmed.

The external resource is preferably a content server.

The network may be an IP network or a subscriber network or a network in which an IP network and a subscriber network are combined.

The authentication request information may include at least one of a user ID and a device identification value. The authentication confirmation information may include a decryption key.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for executing the content reproducing method on a computer.

According to the broadcast receiver and the method of reproducing content according to the present invention, the digital copyright authentication procedure is performed for the content that is requested to be reproduced by the user during the reproduction of the advertisement content, thereby preventing illegal copying and abnormal distribution of the digital content. It can be linked with the management server efficiently.

In addition, the user can play the content that has been requested to be played by the user without delay after the advertisement content is finished playing. Therefore, the user can solve the discomfort of the user by preventing the video from being displayed on the screen and displaying the black screen during the delay time. It can give users the same effect as the fast channel switching that can be felt in the existing analog broadcasting receiver, which can increase user's satisfaction.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

The terms used in the present invention have been selected as general terms widely used as possible in consideration of the functions in the present invention, but may vary according to the intention or custom of a person skilled in the art or the emergence of a new technology. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, it is intended that the terms used in the present invention should be defined based on the meanings of the terms and the general contents of the present invention rather than the names of the simple terms.

1 is a block diagram of a preferred embodiment of a system for providing a broadcast service to a broadcast receiver according to the present invention.

Referring to FIG. 1, a system 100 for providing a broadcast service to a broadcast receiver according to the present invention includes a program provider 110, a content provider 120, and an application provider. 130 and a broadcast receiver 160. The program provider 110, the content provider 120, and the application provider 130 are connected to the broadcast receiver 160 via a wired or wireless network to enable data communication.

In this case, the network may be the IP network 140 or the subscriber network 150, or a network in which the IP network 140 and the subscriber network 150 are combined. IP network 140 may be an IP backbone network that provides a Multicast Routing Protocol, or may be the Internet. Subscriber network 150 may be configured with any one of Ethernet, xDSL (ADSL, VDSL), Hybrid Fiber Coaxial Cable (HFC), Fiber To The Curb (FTTC), and Fiber To The Home (FTTH). have. In addition, the network may be a Broadband Convergence Network (BCN). Broadband convergence network refers to a quality guaranteed integrated network that can safely provide broadband multimedia services integrating communication, broadcasting, and the Internet, and includes next generation convergence network (NGcN).

The broadcast receiver 160 may be a set-top box built-in TV or an IP set-top box connected to a user's TV, and may also be a computer, a notebook, a personal portable terminal, or a mobile communication terminal. In addition, the broadcast receiver 160 may be an IPTV or an ADSL TV.

On the other hand, not only the first embodiment, but also other embodiments to be described below will be described by taking the case where the broadcast receiver 160 is an IPTV in consideration of the convenience of explanation and understanding. Therefore, the scope of the present invention is not limited to IPTV, but may be applied to other broadcast receivers, and this point is apparent when considering the claims of the present specification.

The program provider 110 is a server operated by operators supporting content programs that fill each channel of the broadcast receiver 160 and may be configured as one or more servers. The Program Provider 110 is a back office server that provides daily and monthly billing processing for the use of IPTV service by subscribers, a subscriber management server that manages member information, subscription and termination for TV services, and a control system. Monitoring server that monitors IPTV broadcasting signal transmission failure and downlink to check reception failure and subtitles, and various business process information (program programming, material information, contract information, product information, etc.) to operate broadcasting service. May include a media management server. Here, the media management server manages program organization information, content and media management information, acquires / manages EPG information as a broadcast schedule information, manages real-time broadcasting and VoD channel formation in terms of operation, and interworks with each subsystem. In terms of management, VoD catalog generation management, various product management and analysis, broadcasting transmission monitoring can be further performed in terms of marketing analysis reporting and delivery such as settlement with CP / CA and subscriber viewing inclination.

The content provider 120 is a server that provides content to the broadcast receiver 160. The content provider 120 uses a web or an IPTV client for the IPTV service to provide a live channel service (Video: PP, etc.) to the broadcast receiver 160, and audio: music. PP Service), VOD Service, Enhanced Service (Ticker, Program Information, Quiz / Research), TCommerce Service (Advertisement: Interlocking Advertisement, DAL, Banner Ad, Shopping: PP Interlocking Shopping, Standalone Shopping, Finance: TV Home banking), T-Internet service (informational information: weather, local information, transportation finance, etc. Other web, games: board games, network games, PS2 games, etc .: other: karaoke, education, telemedicine), T-Communication It can provide two-way T-Contents service in various fields such as service (Mail, SMS, Messenger, video call, VoIP, and personal video recorder (PVR)).

The application provider 130 is a server that provides software to the broadcast receiver 160. The software may include a hardware driver or software for updating the hardware driver and software in which an application is implemented. Here, the application refers to an application executed on the broadcast receiver 160 to provide the driving of the broadcast receiver 160 or other additional services (EPG, VOD). The broadcast receiver 160 downloads the software implementing the corresponding application from the application provider 130 and executes it.

2 is a structural diagram showing a configuration of a preferred embodiment of the hierarchical structure of the broadcast receiver according to the present invention.

Referring to FIG. 2, the broadcast receiver 200 according to the present invention includes an application 210, middleware 220, an operating system 230, and hardware 240, and provides a broadcast service to the broadcast receiver according to the present invention. Corresponding to the broadcast receiver 160, which is a component of the system 100.

The middleware 220 mediates data between the application 210 and the operating system 230, and manages and controls the hardware 240. In addition, the middleware 220 receives a request of the application 210, executes the received request, calculates a result of the received request, and transmits the calculated result to the application 210. For this purpose, the middleware 220 includes a digital rights management (DRM) module 221, a download and play (DNP) module 222, and a streaming module 223.

The digital rights management module 221 performs a digital copyright authentication procedure. The digital rights management module 221 requests a digital rights management server for digital copyright authentication of content downloaded from the content provider 120 and receives a decryption key from the digital rights management server. The digital rights management module 221 decrypts the content downloaded from the content provider 120 with the decryption key. In another embodiment, the digital rights management module 221 may be implemented as a DRM controller hardware. In this case, the middleware 220 performs a function of controlling the digital rights management module 221.

The download / playback module 222 is a module that supports downloading and playing content from the content provider 120 in a download and play (DNP) manner. Here, the download and play (DNP) method downloads and plays the entire content file such as a video into the memory 243, so that the quality of the content playback is perfect, the content can be moved back and forth, and can be played immediately again and again later. There are advantages, but it takes a long time to download.

When the application 210 requests to play a specific content in a download and play (DNP) manner, the download / play module 222 downloads the specific content requested by the application 210 from the content provider 120 to the memory 243. ). In addition, the download / playback module 222 determines whether to play or not according to the download capacity of the requested specific content. In this case, for digital copyright authentication, a digital copyright authentication procedure may be performed to play specific content requested by the digital rights management module 221.

The streaming module 223 is a module that receives and plays content from the content provider 120 in a streaming manner. The streaming method refers to a transmission method of receiving data while reading the data as if flowing from the content provider 120 and playing it in real time. In a streaming manner, the broadcast receiver 200 may reproduce video and audio data having a large data capacity on the Internet in real time without downloading the memory 243. The streaming module 223 may be implemented to support, for example, a real-time transport protocol (RTP) and a real-time streaming protocol (RTSP).

The hardware 240 refers to hardware configuring the IPTV, and includes a processor 241, a media processor 242, a memory 243, and a network interface 244. The processor 241 executes the application 210 and the middleware 220, for example, may be implemented as a central processing unit (cpu). The network interface 244 performs data communication with the program provider 110, the content provider 120, and the application provider 130. For example, the network interface 244 may be implemented as a network adapter. The media processor 242 includes a demultiplexer, a video decoder, and an audio decoder. In this case, the media processor 242 may be implemented by being modified by firmware or software. In this case, the middleware 220 may perform a function of the media processor 242.

The operating system 230 manages or controls the hardware 240, the middleware 220, and the application 210, and serves as an interface between the hardware 240 and the middleware 220. To this end, the operating system 230 may include a device driver 231 for driving hardware such as the media processor 242 and the network interface 244, and may execute a Java program to execute a Java program. It can be loaded with a virtual machine (Java Virtual Machine, 232), and with other software. As the operating system 230, a general-purpose operating system such as Windows, Windows NT, Linux, Unix, OS / 2, or MAC OS may be used, and may modify the general-purpose operating system or dedicate the broadcast receiver 200 according to the present invention. Newly developed operating systems can be used.

Application 210 uses middleware 220 to utilize hardware resources. That is, the application 210 maintains compatibility between the application 210 and the hardware 240 by allowing the application 210 to use the hardware resources through the middleware 220 without directly handling the hardware resources. For compatibility of the application 210, the middleware 220 separates the application 210 from the hardware 240. And the program code for the application 210 may be stored at initial installation in the memory 243 or downloaded from the application provider 130 and stored in the memory 243, calling user requests, middleware and other applications. If there is, the processor 241 reads the program code stored in the memory 243 to execute the application.

In addition, the application 210 performs services such as Electronic Program Guide (EPG), Video On Demand (VOD), Watch TV, E-Mail, Chat, Game, and Personal Video Recorder (PVR). To this end, the application 210 includes a web browser 211 and a T-Contents client 212. The web browser 211 or T-Contents client 212 supports various codecs such as MPEG2, MPEG4, MPEC7, H.264, WMV-9, and an electronic program guide (EPG) for selecting an IPTV service channel. : Electronin Program Guide) and T-Contents.

The EPG may include not only the TV guide function generally mentioned, but also the nature of a Watch TV program requesting the most basic functions of a broadcast receiver. In addition, the EPG may be used to perform services such as pay-per-view. VOD performs common VOD functions. For example, it performs functions such as RVOD (Near VOD), NVOD (Near VOD), and the like, and if there is a hard disk, a hard disk may be used to implement VOD. Watch TV is a program that requests basic operations to watch TV.

3 is a block diagram showing the configuration of a preferred embodiment of a broadcast receiver according to the present invention.

Referring to FIG. 3, the broadcast receiver 300 according to the present invention uses a network interface 310, a demultiplexer 320, a decoder 330, a controller 340, a memory 350, and a user interface 360. Equipped. The network interface 310 may be a component corresponding to the network interface 244, and may be a component including a network interface 244 and a device driver 231 for driving the network interface 244. have. The demultiplexer 320 and the decoder 330 are components corresponding to the media processor 242. The controller 340 may be viewed as a component corresponding to the processor 241 and may also be viewed as a component corresponding to the application 210 or the middleware 220 executed by the processor 241. The memory 350 is a component corresponding to the memory 243.

 The network interface 310 performs data communication with an external resource 301 connected to the network. That is, the network interface 310 may transmit / receive data through an external resource 301 and a network, and output the received data to the demultiplexer 320, the controller 340, and the memory 350, respectively. Here, the external resource 301 may be at least one of the program provider 110, the content provider 120, and the application provider 130.

In addition, the broadcast receiver 300 may use an IPv4 address or an IPv6 address for data communication with the external resource 301, and in this case, the broadcast receiver 300 may receive an IP from the external resource 301 through the network interface 310. Receive a packet. Here, the IP packet may be an IP packet obtained by IP packetizing general data or an IP packet obtained by IP packetizing TS (Transport Stream).

The demultiplexer 320 demultiplexes a signal output from the network interface 310 or a content data stream stored in the memory 350 into a video stream, an audio stream, and a data stream and outputs the demultiplexer to the decoder 330 or the controller 340. do.

The decoder 330 may decode the video stream, the audio stream, and the data stream demultiplexed by the demultiplexer 320 to output the audio 302, the video 303, or output the demultiplexer 320 to the controller 340. . The decoder 330 may include an audio decoder, a video decoder, and a data decoder. That is, the demultiplexer 320 may decode the audio stream in the audio decoder, the video stream in the video decoder, and the data stream in the data decoder.

The user interface 360 receives a content playback request from the user. To this end, the user interface 360 is connected to an input device or a display and provides a menu screen image so that the user can select a desired menu from the displayed menu screen to be displayed. The menu screen may be serviced using any one of an electronic program guide (EPG) among Box List EPG, Text EPG, Mosaic EPG, Mini EPG, and Navigator EPG. The user input signal 304 input from the input device is transmitted to the controller 340 through the user interface 360. The input device may be mounted on the broadcast receiver 300 or may be a remote controller that transmits the user request signal 304 wirelessly.

The controller 340 downloads the content requested by the user from the external resource 301 through the user interface 360. The controller 340 controls the demultiplexer 320 and the decoder 330 to store the requested content in the memory 350 according to a content service method and to play the stored content or to directly play the requested content. And the decoder 330. Here, the content service method may include a DNP method or a streaming method.

 When the content service method is the DNP method, the controller 340 stores the requested content in the memory 350 and controls the demultiplexer 320 and the decoder 330 to play the stored content. In this case, the controller 340 may control to play the requested content when the storage amount of the requested content is stored above a preset capacity. Here, the preset capacity may be a full capacity, a capacity of a predetermined ratio with respect to the full capacity, and may be set to a value obtained by multiplying the number of image frames reproduced per 10 seconds by the size of the image frame.

When the content service method is a streaming method, the controller 340 controls the demultiplexer 320 and the decoder 330 to immediately play the requested content.

In addition, the controller 340 may play the advertisement content before playing the content requested by the user through the user interface 360. The advertisement content may be stored in the memory 350 in advance, and may be downloaded and played from the external resource 301 if necessary.

In addition, the controller 340 may perform a digital copyright authentication procedure when digital copyright authentication is required to play the content requested by the user through the user interface 360. The content used for IPTV service is digital content, which can be easily copied and distributed unlike analog content, and the copy of digital content has no deterioration in quality compared to the original. In light of this, problems of illegal copying and abnormal distribution of digital contents can be caused. Therefore, digital copyright certification is required to prevent or suppress illegal copying and illegal distribution of contents used for IPTV service, and digital rights management (DRM) has been applied for this purpose.

The controller 340 may perform a digital copyright authentication procedure after playing the advertisement content. However, in such a case, it may take a delay of about 1 second until the content requested by the user is started through the user interface 360 after the advertisement content is played. This delay may be even higher depending on network conditions and the situation of the digital rights management server. In particular, since no image is displayed on the screen during the delay time, it is displayed as a black screen, so that the user may feel uncomfortable as compared with a fast channel switching on a general analog TV.

In order to reduce the delay time, solve the user's inconvenience, and increase the user's satisfaction, the controller 340 performs a digital copyright procedure on the downloaded content while playing the advertisement content. Accordingly, since the broadcast receiver 300 according to the present invention can play the content requested by the user without delay after the advertisement content is finished playing, the broadcast receiver 300 can give the user an effect such as fast channel switching that can be felt on an analog TV. Can increase.

4 is a block diagram showing the configuration of a preferred embodiment of the control unit.

Referring to FIG. 4, the controller 340 includes a download / play manager 410, a streaming manager 420, a digital rights management manager 430, and a network controller 440. The download / play manager 410, the streaming manager 420, and the digital rights management manager 430 are components corresponding to the download / play module 221, the streaming module 223, and the digital rights module 221, respectively. .

The download / play manager 410 downloads and plays the content from the external resource 301 in a download and play (DNP) manner. When the user requests to play a specific content through the user interface 360 in a DNP manner, the download / play manager 410 requests the network controller 440 to download the specific content requested by the user from the external resource 301. . The download / play manager 410 controls the demultiplexer 320 and the decoder 330 to play the advertisement content. In addition, the download / playback manager 410 may request digital rights management from the digital rights management manager 430 to digitally authenticate the content requested by the user while playing the advertisement content. Then, the digital rights management manager 430 performs a digital copyright authentication procedure for the specific content requested by the user while playing the advertisement content.

The download / play manager 410 may check the download capacity of the specific content requested by the user when the advertisement content finishes playing or the digital copyright authentication is completed, and determine whether to play the content according to the download capacity of the specific content requested by the user. have.

The network controller 440 downloads the content requested by the user from the external resource 301. When the network controller 440 receives the download request using the DNP method, the network controller 440 stores the downloaded content in the memory 350. In this case, the network controller 440 may allocate a buffer to the memory 350 to buffer the downloaded content. In addition, when the download request is received by the streaming method, the network controller 440 controls the network interface 310 so that the broadcast interface 300 can directly play the downloaded content so that the network interface 310 causes the external resource ( The signal received from 301 is output to the demultiplexer 320.

The streaming manager 420 downloads and plays the content from the external resource 301 in a string manner. When the user requests to play a specific content in a string manner through the user interface 360, the streaming manager 420 requests the network controller 440 to download the specific content requested by the user from the external resource 301. The advertisement content may be downloaded and played from the external resource 301 before the specific content is downloaded, or may be played by the streaming manager 420 before requesting the network controller 440 to download the specific content. In addition, the streaming manager 420 may request digital copyright management manager 430 for digital copyright authentication for the content requested by the user while playing the advertisement content. Then, the digital rights management manager 430 may perform a digital copyright authentication procedure for the specific content requested by the user while playing the advertisement content.

5 is a block diagram of a preferred embodiment of a system for digital copyright authentication of content received by a broadcast receiver according to the present invention.

Referring to FIG. 5, a system 500 for digital copyright authentication of content received by a broadcast receiver according to the present invention includes a content provider workstation 510 and a digital rights management server (DRM). Server 520 and a content server 530 and a broadcast receiver 300 are provided. Here, the content provider workstation 510 and the content server 530 are components corresponding to the external resource 301.

The digital rights management manager 430 performs a digital copyright authentication procedure. The digital rights management manager 430 requests the digital rights management server 520 for digital copyright authentication for the content requested by the user. The digital rights management manager 430 may transmit the authentication request information to the digital rights management server 520 as a digital copyright authentication request.

The authentication request information includes at least one of a content identification value, a user ID, and a device identification value. The content identification value is a value for identifying the content requested by the user from other content, and is generated by the content provider workstation 510 in the process of packaging the content. The program provider 110 may transmit a content identification value at the time of transmitting the content program information. When the user requests to play the content through the user interface 360, the digital rights management manager 430 sets the content identification value. It may be transmitted from the download / playback manager 410 or the streaming manager 420. The user ID may be input from the user when the broadcast receiver 300 is initially set up, at boot time, or when the user requests content playback. The device identification value is a value for identifying the broadcast receiver 300. The MAC address, serial number, and flash memory number of the broadcast receiver 300 may be used as the device identification value.

The digital rights management manager 430 receives authentication confirmation information from the digital rights management server 520. The authentication confirmation information includes at least one of a decryption key and a use right. The digital rights management manager 430 decrypts the content downloaded from the external resource 301 with the decryption key. In another embodiment, the digital rights management manager 430 may be implemented as a DRM controller hardware.

The content provider workstation 510 performs a content packaging process in order to apply a DRM to the content to serve the content. The content information is registered in the digital rights management server 520 through the content packaging process, and the content is encrypted. The content information may include a content identification value.

The content server 530 receives the content package, which is the content packaged by the content provider workstation 510, from the content provider workstation 510 and publishes the content package for download by the broadcast receiver 300. When the broadcast receiver 300 downloads the content through an appropriate digital copyright certification procedure, the actual download is a file in the form of a content package.

The digital rights management server 520 issues a license for the user to use the content package. When the broadcast receiver 300 makes a digital copyright authentication request, the digital rights management server 520 determines whether a license can be issued. Here, the broadcast receiver 300 may transmit the authentication request information to the digital rights management server 520 as a digital copyright authentication request. As described above, the authentication request information includes at least one of a content identification value, a user identification value, and a device identification value. The digital rights management server 520 examines whether the broadcast receiver 300 and the user of the broadcast receiver 300 may be issued a license for the content indicated by the content identification value based on the authentication request information.

If it is determined that the user of the broadcast receiver 300 and the broadcast receiver 300 can be issued a license for the content indicated by the content identification value, the digital rights management server 520 generates authentication confirmation information to generate the broadcast receiver. Issue to 300. As described above, the authentication confirmation information includes a decryption key and a usage right. Here, the use right is information indicating whether the right to copy, distribute, distribute, etc. the downloaded content.

6 is a flowchart illustrating a preferred embodiment of the method of playing a content according to the present invention.

Referring to FIG. 6, the user interface 360 receives a content playback request (S600). The network interface 300 downloads the requested content (S610). The controller 340 displays the advertisement content (S620). The controller 340 initializes the DRM resource (S630). The controller 340 transmits authentication request information for digital copyright authentication of the requested content to the digital rights management server 520 (S640).

The control unit 340 confirms whether authentication confirmation information is received from the digital rights management server 520 (S650). The authentication confirmation information includes at least one of a content identification value, a user identification value, and a device identification value.

When the authentication confirmation information is not received from the digital rights management server 520, the controller 340 transmits the authentication request information for digital copyright authentication for the requested content back to the digital rights management server 520, or the request. Play of the content can be ended.

If the authentication confirmation information is received from the digital rights management server 520, it is checked whether the requested content download has proceeded more than a preset capacity (S660). In this case, the authentication confirmation information includes at least one of a decryption key and a usage right.

If the requested content download proceeds more than a preset capacity, the controller 340 ends the reproduction of the advertisement content (S670). The controller 340 decrypts and plays the requested content based on the decryption key included in the authentication confirmation information (S680).

7 is a view showing the implementation of another preferred embodiment of the content playback method according to the present invention.

Referring to FIG. 7, the user interface 360 receives a content playback request in operation S700. The network interface 300 downloads the requested content (S710). The controller 340 displays the advertisement content (S720). The controller 340 initializes the DRM resource (S730). The control unit 340 transmits authentication request information for digital copyright authentication of the requested content to the digital rights management server 520 (S740).

The controller 340 confirms whether authentication confirmation information is received from the digital rights management server 520 (S750). The authentication confirmation information includes at least one of a content identification value, a user identification value, and a device identification value.

When the authentication confirmation information is not received from the digital rights management server 520, the controller 340 transmits the authentication request information for digital copyright authentication for the requested content back to the digital rights management server 520, or the request. Play of the content can be ended.

When the authentication confirmation information is received from the digital rights management server 520, the controller 340 waits until the reproduction of the advertisement content is completed. In addition, the controller 340 checks whether the requested content download proceeds over a preset capacity (S760). In this case, the authentication confirmation information includes at least one of a decryption key and a usage right.

If the requested content download proceeds more than a preset capacity, the controller 340 ends the reproduction of the advertisement content (S770). The controller 340 decrypts and plays the requested content based on the decryption key included in the authentication confirmation information (S780).

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer device is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission via the Internet) . The computer-readable recording medium may also be distributed to networked computer devices so that computer readable code can be stored and executed in a distributed manner.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

1 is a block diagram of a preferred embodiment of a system for providing a broadcast service to a broadcast receiver according to the present invention;

2 is a structural diagram showing a configuration of a preferred embodiment of a hierarchical structure of a broadcast receiver according to the present invention;

3 is a block diagram showing the configuration of a preferred embodiment of a broadcast receiver according to the present invention;

4 is a block diagram showing a configuration of a preferred embodiment of the control unit;

5 is a block diagram of a preferred embodiment of a system for digital copyright authentication of content received by a broadcast receiver according to the present invention;

6 is a view showing a process of performing a preferred embodiment of the content playback method according to the present invention, and

7 is a view showing the implementation of a preferred embodiment of the content playback method according to the present invention.

Claims (12)

A network interface for data communication with external resources connected to the network; A user interface for receiving a content playback request from a user; And And a control unit which downloads the requested content from a content server and requests digital copyright authentication of the content while playing the advertisement content. The method of claim 1, And the broadcast receiver is an IPTV. delete The method of claim 1, The network is a broadcast receiver, characterized in that the IP network or a subscriber network or a network combining the IP network and the subscriber network. The method of claim 1, The control unit, And transmitting at least one of a user ID and a device identification value to a digital rights management (DRM) server connected to the network to request digital rights authentication. The method of claim 1, The control unit, And receiving a digital copyright authentication confirmation for the content and playing the content whose authentication is confirmed. Downloading content from a content server connected to a network; Displaying the advertising content; Transmitting authentication request information for digital copyright authentication of the downloaded content to a digital rights management (DRM) server connected to the network; And And when the authentication confirmation information is received from the Digital Rights Management (DRM) server, terminating the reproduction of the advertisement content and playing the content whose authentication is confirmed. The method of claim 7, wherein And said network is an IP network or a subscriber network or a network combining an IP network and a subscriber network. delete The method of claim 7, wherein The authentication request information includes at least one of a user ID and a device identification value. The method of claim 7, wherein And the authentication confirmation information includes a decryption key. A computer-readable recording medium having recorded thereon a program for executing the content reproduction method according to any one of claims 7, 8, 10 and 11 on a computer.

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