KR101245519B1 - Apparatus and method for protecting broadcasting contents - Google Patents

Abstract

The present invention relates to an apparatus and method for protecting broadcast content.

The present invention provides indiscriminate distribution, random use prohibition, and safe protection of broadcast contents recorded using a broadcast receiver.

An apparatus according to an embodiment of the present invention is a device for recording broadcast content, the control unit of the setting of the channel to be recorded, the control unit for controlling the recording time and file conversion, and receives the broadcast signal from the control unit And a program input unit for outputting the broadcast content by tuning a set channel, a virtual file module for converting the output broadcast content into a virtual file under the control of the controller, and a storage unit for storing the converted virtual file.

Broadcast program protection, recording, copy control, virtual file system, virtual file module

Description

Broadcasting content protection device and method {APPARATUS AND METHOD FOR PROTECTING BROADCASTING CONTENTS}

The present invention relates to an apparatus and method for protecting broadcast content.

"The present invention is derived from the research conducted as part of the IT new growth engine core technology development project of the Ministry of Knowledge Economy and the Ministry of Information and Telecommunication Research and Development. [Task No. 2007-S-003-02, Title: Protection of terrestrial DTV broadcasting programs Technology development]. "

The broadcast service is a service that delivers predetermined content to a user's receiver through a wireless or wired network to view a broadcast program.

Digital broadcasting has emerged due to the demand for high quality images and high quality sound due to the evolution of broadcasting services. In addition, with the development of technology, it is possible to freely select broadcast contents through the miniaturization of a TV receiver, and can receive various additional services.

For example, due to the evolution of broadcast service technology, terrestrial DMB services are provided, and through the miniaturization of devices, mobile phones or notebook PCs can be used, and thus, anytime and anywhere broadcasting contents can be provided. Here, broadcast content refers to information that can be provided or stored to a user as a production made in various forms such as voice, video, and data. For example, a drama, a piece of music, a picture, etc. may correspond.

These vast amounts of broadcast content can be transmitted through media such as terrestrial, satellite, and cable broadcasts, and receivers can be classified into fixed and mobile types. In the fixed type, there are TVs (HDTVs, IP-TVs), set-top boxes, and computers equipped with receiving cards that receive high quality broadcasts. In addition, in the case of a mobile type, a portable terminal for receiving a terrestrial or satellite DMB, a multi-function device such as WiBRO, a portable multimedia player (PMP), and a navigation device may be used.

Each broadcast receiver is equipped with a storage device such as a hard disk device so that broadcast contents can be received and recorded in the receiver. You can also play recorded broadcast content.

The broadcast receiver allows not only to watch a broadcast program in real time, but also to view broadcast content already stored in a storage device at a desired time period.

However, since broadcast contents are copyrighted works, they should be protected from unauthorized copying or fraudulent use, but protection methods are inadequate.

For example, in the case of a television watching a terrestrial broadcasting program, a hard disk is used as a temporary storage device for recording and a timeshift function. In this case, recording is performed in the form of TS (Transport Stream) transmitted from a broadcasting station in order to reduce CPU load and efficiently operate a program. TS-type files have the disadvantage that they can be easily played back and modified on a playback device that has a specific codec (MPEG2-TS), making recorded broadcast contents difficult to protect.

As the demand for protection for broadcast programs increases, protection functions for broadcast programs recorded through some set-top boxes are applied. The current major protection methods are as follows.

First, it is a method of protecting recorded broadcast contents on a file basis. This usage method encrypts individual files in the recording phase. When playing, decryption according to encryption causes CPU load, and in case of high quality broadcast content, CPU occupancy increases due to encryption and decryption.

The second method is to use a separate device or a file system that is difficult to recognize in other systems. There is a method of making a driver or a file system dedicated to a receiver for receiving broadcast content so that an external system cannot recognize the recorded broadcast content.

Third, it is a method of restricting hardware access in the broadcast receiver. However, such a method can be easily accessed by removing the hard disk and attaching it to another device when using a general hard disk. Also, a computer equipped with a broadcast receiving card can be easily accessed using hardware. The method is virtually impossible. In the case of a computer equipped with a broadcast receiving card, copy control is not easy because copying in file units can be made freely by an external program.

Accordingly, an object of the present invention is to provide indiscriminate distribution, random use prohibition, and safe protection of broadcast contents recorded using a broadcast receiver.

An apparatus according to an embodiment of the present invention is a device for recording broadcast content, the control unit of the setting of the channel to be recorded, the control unit for controlling the recording time and file conversion, and receives the broadcast signal from the control unit And a program input unit for outputting the broadcast content by tuning a set channel, a virtual file module for converting the output broadcast content into a virtual file under the control of the controller, and a storage unit for storing the converted virtual file.

More preferably, the virtual file module decodes the virtual file stored in the storage unit into the broadcast content under control of the controller when outputting a file to the outside, and decodes the decrypted broadcast content under control of the controller. The apparatus may further include an external file input / output unit outputting to an external storage device.

More preferably, the external file input / output unit includes an encryption unit for encrypting the decrypted broadcast content, a packaging unit for converting the decrypted broadcast content into a predetermined file format, and the resolution of the decrypted broadcast content. Or a program changer for converting a file format.

According to an embodiment of the present invention, a method for recording broadcast content includes: receiving a broadcast content by tuning a preset channel, and setting a virtual file area in a storage area when a recording request of the broadcast content is requested; And converting the received broadcast content into a virtual file and storing the converted broadcast content in the set virtual file area.

According to the present invention, it is possible to provide indiscriminate distribution, arbitrary use prohibition, and safe protection of broadcast contents recorded using a broadcast receiver.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. And in describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, it is to be noted that each of the terms described below are only used to help the understanding of the present invention, and may be used in different terms despite the same purpose in each manufacturing company or research group.

The broadcast receiver described in the present invention collectively refers to a device capable of receiving and storing broadcast content such as a PMP, a set-top box, a computer equipped with a terrestrial broadcast receiving card, and navigation. In addition, the broadcast receiver described below refers to a receiver having a screen output and a storage device such as a hard disk. Hereinafter, for convenience of description, a computer or a set-top box equipped with a broadcast receiving card will be described as an example.

1 is a block diagram of a broadcast content protection device according to an embodiment of the present invention.

The broadcast signal described in the embodiment of the present invention may include both analog broadcast and digital broadcast, and may be classified into wireless and wired according to a signal transmission method. For example, a set-top box may include a satellite broadcasting receiver as a wireless communication method, and cable broadcasting and IP-TV as a wired communication method. In addition, a computer equipped with a broadcast receiving card may be a wireless communication method for receiving terrestrial and satellite DMB and a wired communication method for connecting a cable of a cable to the computer, such as cable broadcasting.

The user input unit 103 may have two types. First, the user can directly input the key, which has a key metric structure and generates a key value pressed by the user. That is, various modifications such as a touch screen or a touch pad may exist in a form in which a user directly inputs a key.

Another form uses a predetermined communication method, and as a representative example, a form such as a remote controller may exist. That is, the remote controller may be divided into a remote controller for converting a signal input by a user remotely into an infrared ray or a predetermined wireless signal and provided to the receiver, and a device for receiving the remote controller signal. Therefore, the user input unit 103 may include all of these forms, and there is no particular limitation. In addition, a PC may include input devices such as a keyboard and a mouse.

The controller 102 performs overall control of the broadcast receiver. Of the overall control, only the control related to the present invention will be described.

First, the controller 102 controls the program input unit 101 to select a desired channel from the received broadcast signal. Then, the output path of the signal input from the program input unit 101 is controlled. When only the received signal is provided to the user, the program input unit 101 controls the signal of the channel selected to be input to the reproduction unit 110.

Secondly, the control unit 102 controls the recording of the received signal according to the present invention. Accordingly, the controller 102 may control the output of the program input unit 101 to be simultaneously output to the playback unit 110 and the virtual file module 107 or to be output only to the virtual file module 107. At this time, the controller 102 controls the virtual file module 107 to store broadcast content according to the present invention. An operation of storing the virtual file module 107 will be described in detail with reference to the detailed block configuration of FIG. 2 and the control flowchart of FIG. 5.

Third, the control unit 102 performs control of playing back the stored (recorded) broadcast content according to the present invention. In this case, the file stored in the storage unit 108 is read through the virtual file module 107, and the program input unit 101 is controlled to transfer the data read through the virtual file module 107 to the playback unit 110. To play it back.

Fourth, the control unit 102 performs a control for providing the data stored through the virtual file module 107 to an external device. This control process will be described with reference to FIGS. 7 and 8 to be described later.

The program input unit 101 according to the present invention may be configured as a tuner device for searching for broadcast content desired by a user under the control of the control unit 102. When used in IPTV, it can also be configured as an IP network input device (IP tuner device). In addition, the program input unit 101 is a place for reading a file stored in the storage unit 108 when playing the stored broadcast content.

The reproduction unit 110 may be configured of a demultiplexing 111 and a decoder 112 similarly to a general receiver. The broadcast content received through the program input unit 101 through the demultiplexing 111 and the decoder 112 may be reproduced by a display device such as a monitor capable of outputting the screen through the play unit 110.

The virtual file module 107 includes a virtual file system. A virtual file system is a method for supporting different file systems under one file system by creating another file system on one file system. Current virtual file system is a technology used to test another operating system under one operating system or to emulate another system.

The virtual file module 107 according to an embodiment of the present invention performs the following tasks.

First, when a recording request enters the virtual file module 107 through the control unit 102, the broadcast content received by the program input unit 101 is converted into a virtual file. When the broadcast content is converted into a virtual file, detailed information about the file cannot be viewed from an external application or an external device, and additional functions may be added to restrict the use to a specific user or a specific device.

Second, as a case of reproducing the broadcast content file recorded in the storage unit 108, the virtual file module 107 should convert the broadcast content file stored as the virtual file into a file reproducible by the reproducing unit 110. The broadcast content converted into a playable file is transmitted to the program input unit 101. The broadcast content delivered to the program input unit 101 may be reproduced by a device such as a monitor capable of outputting the screen through the play unit 110.

Third, in case of copying the broadcast content file stored in the storage unit 108 to the external storage device 208, the virtual file module 107 converts the broadcast content converted into a virtual file into a file that can be played on an external device and outputs it. Must be a week The file converted to be playable in the external device may be copied to the external storage device through the external file input / output unit 109. In addition, the external file input / output unit 109 may distribute only to a specific person or a target device when inputting / outputting a file to or from an external storage device, and may perform a function of converting a resolution or format of the file.

2 is a block diagram of a virtual file module according to an embodiment of the present invention. An internal configuration diagram of the virtual file module 107 will be described with reference to FIG. 2.

The virtual file module 107 may include an authentication unit 201, a virtual file system management unit 202, a codec 203, and a data input / output unit 204.

The virtual file system manager 202 determines whether the virtual file area of the storage unit 108 exists through the data input / output unit 204 and the file input / output unit 205 when the first broadcast receiver is operated. In this case, the virtual file system manager 202 may allocate a virtual file area to the storage 108 or read and load an existing virtual file area. In the virtual file area setting process, the virtual file system manager 202 connects the virtual driver to the storage 108, and a driver or a folder is created in the storage 108. At this time, broadcasting contents are stored in a driver or a folder. In addition, while the virtual driver is connected, the virtual file system manager 202 may perform functions such as recording, playing, and outputting an external file.

The detailed operation of the virtual file module can be described as follows.

First, when a broadcast content recording request is received, the program input unit 101 selects a desired broadcast signal through the user input unit 103 to receive broadcast content. The received broadcast content is provided to the virtual file system manager 202 and recorded. In this case, the authentication unit 201 may compare the authentication information or the user authentication information of the receiver with the authentication information stored in the storage unit to allow only a specific receiver or a specific user to access. If necessary, this step can be omitted.

The codec 203 converts the broadcast content received through the authenticator 201 or the virtual file system manager 202 into a virtual file. The codec 203 may be composed of an encoder (not shown separately in the drawing) that converts it into a virtual file and a decoder (not shown separately in the drawing) that reads the virtual file and delivers the recorded broadcast content to the program input unit 101. have. When the encoder and the decoder include an encryption / decryption function, the stored data may be encrypted.

The broadcast contents recorded while performing the authentication unit 201 and the codec 203 process are converted into virtual files, thereby preventing indiscriminate distribution and arbitrary use. The virtual file system manager 202 transfers the file converted into a virtual file to the data input / output unit 204 to store the file in the storage 108.

The file input / output unit 205 receives the virtual file encrypted from the data input / output unit 204 according to the present invention and performs control when storing or reading the data into the storage unit 108. That is, the file input / output unit 205 selects a driver according to a storage medium when the virtual file is required to be stored, and stores the virtual file in the virtual file area preset in the storage unit 108. In addition, the file input / output unit 205 selects a driver according to a storage medium when a virtual file is required to be read, and reads the corresponding virtual file from the storage area of the set virtual file and provides the data to the data input / output unit 204. do.

In addition, the virtual file system manager 202 manages the address, index, etc. of the memory of the broadcast content stored in the virtual file, and also manages the hash information to confirm the stored data.

Second, in the case of playing the stored broadcast content, the controller 102 may control the virtual file module 107 to provide a list recorded in the storage 108 to the display device.

When the user selects a list to play, the broadcast content stored in the storage unit 108 is transferred to the data input / output unit 204 of the virtual file module 107 through the file input / output unit 205. The data input / output unit 204 converts the delivered broadcast content into a form that can be processed by the virtual file module 107 and provides it to the codec 203. The codec 203 then decodes the broadcast content input under the control of the virtual file system manager 202. The decoding operation means converting a virtual file into a file reproducible by the playback unit 110. If the encryption function is included when recording the broadcast content, the decryption process should be performed.

The virtual file system manager 202 transfers the recorded broadcast content to a program input unit 101 when the recorded content is converted into a file that can be reproduced by the playback unit 110. The file transmitted to the program input unit 101 is input to the reproducing unit 110 under the control of the control unit 102 to be reproduced.

Third, when copying the broadcast content stored in the storage unit 108 to the external storage device 208 will be described in more detail in the control flowchart of FIG. 8 according to the configuration of FIG.

3 is a control flowchart of setting a virtual file area in a virtual file module according to an embodiment of the present invention. 3 will be described from the state where the initial power is input and the initialization is performed by the operation in the set-top box or the computer.

The virtual file system manager 202 of the virtual file module 107 performs initialization in step 300 when power is input. In this case, the initialization means that the virtual file system manager 202 collects the initialized and initialized information of the respective parts of FIG. 2. In addition, the initialization process may include detecting a type of the storage unit 108 connected to the virtual file module. When the initialization process is completed as described above, the virtual file system manager 202 proceeds to step 302 to control the data input / output unit 204 so that the virtual file area is preset in the storage unit 108 connected to the file input / output unit 205. Check for presence. That is, the virtual file system manager 202 provides a signal for checking whether a virtual file area is set in the storage 108 to the file input / output unit 205 through the data input / output unit 204. Then, the file input / output unit 205 selects a driver corresponding to the physically connected storage unit 108, checks whether a virtual file area is set in the storage unit 108 through the selected driver, and then outputs the result to the data input / output unit ( 204). The data input / output unit 204 provides the verification result received from the file input / output unit 205 to the virtual file system manager 202. Through this process, the virtual file system manager 202 may check whether the virtual file region exists in the storage 108 in step 304.

If the virtual file area exists, the virtual file system manager 202 reads and loads the preset area value of the storage 108 in step 306. On the other hand, if the virtual file area does not exist, the virtual file system manager 202 creates the virtual file area in the storage 108 in step 308. When the virtual file area is loaded and generated, the virtual file system manager 202 maintains a connection state with the virtual driver in step 310.

Step 310 is a virtual driver connection process. When the creation or loading of the virtual file area is completed, the virtual file system manager 202 transitions to a state of managing the virtual file area of the storage 108. In this process, the virtual file system manager 202 may require an authentication process to connect with the virtual driver. The authentication process allows access only to receivers or specific users with specific serial numbers or IDs. In addition, the authentication process may be performed at any point before step 306 or 308 of FIG.

In this authentication process, a different virtual file system may be provided according to a user, and in this case, a plurality of virtual file system files stored in a storage unit may exist. At this time, the user goes through the authentication process and accesses the virtual file system corresponding to the corresponding authentication information.

4 illustrates a data structure of a virtual file system according to an embodiment of the present invention.

4 illustrates an example of a configuration of broadcast content stored in a virtual file on the storage 108.

The data structure of a virtual file in a virtual file system (VFS) may be composed of a virtual file system (VFS) index 410 and a virtual file system (VFS) data 420, as shown at 400. have.

The VFS index 410 represents a list of data components of broadcast content stored in the virtual file. As an example, as indicated by reference numeral 410, the VFS index 410 shows that information including two files, such as reference numerals 411 and 412, is included. The remaining area of the VFS index 410 is spared.

The VFS data 420 represents a data file corresponding to the VFS index 410. That is, the first index 411 of the VFS index 410 indicates an area corresponding to program1.trp 421. The file information of the received broadcast content may be shown to the user by using the VFS index.

In addition, the broadcast content stored through the virtual file module 107 reads the information of program1.trp 421 and program2.trp 422, which are VFS data 420, only through an application program or a device program corresponding to the receiver or the receiver. Can be. In this case, when accessing the stored broadcast content in the receiver, the receiver may request authentication. After authentication of the receiver, the virtual file system manager 202 reads the virtual file and accesses the program1.trp 421 and program2.trp 422 of the virtual file system. However, when using an application of an external device, the broadcast content can be recognized only in the form of the virtual file data structure 400.

If you want to increase the security level, the virtual file system manager 202 encrypts the index and hash for the virtual file. For example, the virtual file system manager 202 encrypts and stores the VFS index 410 or the VFS data 420. In this case, the codec 203 of the virtual file module 107 may include an encryption / decryption function to be used for copy control of the recorded broadcast program. By using this method, the receiver can restrict access of unauthorized users or external devices. The recorded broadcast content file is freely accessible to the virtual file in the receiver while the virtual driver is connected.

5 is a control flowchart of recording broadcast content in a virtual file module according to an embodiment of the present invention.

Operation 310 shown in FIG. 5 means the virtual driver connection state described above. Therefore, in the description of FIG. 5, the virtual driver connection state will be described.

In step 500, the virtual file system manager 202 determines whether there is a recording request. If there is no recording request in step 500, the controller 102 performs the corresponding function 504 inputted through the user input unit 103 and waits for the next input of the user in the virtual driver connection state 310.

On the other hand, if a recording request occurs, the control unit 102 controls the virtual file system management unit 202 to receive the broadcast content from the program input unit 101. Step 502 is a step of performing a recording function, which is composed of authentication, coding, and storage.

Authentication may be set to be available only to a specific device or a user through the authentication unit 201. If authentication is not required, this process can be omitted.

Coding is an encoding process for recording a currently received broadcast program. In this encoding process, various encoding methods for recording broadcast content may be used. I will not limit the encoding method here. In addition, as described above with reference to FIGS. 2 and 4, an encryption function may be added to increase a security level. The broadcast content that has undergone the encoding process is stored in the storage unit 108 under the control of the virtual file system manager 202. The virtual file is stored in the storage unit 108 through the data input / output unit 204 and the file input / output unit 205.

In step 506, the controller determines whether recording end is requested. The determination of the recording end request may be a case where the user requests the end of recording through the user input unit 103 or when the recording is requested only for a predetermined time at the time of recording. If the end of recording is not required, the received broadcast content continues recording in step 502. On the other hand, if the end of recording is required, the process proceeds to step 508 which is a system termination procedure in step 506. In operation 508, when the terminal selection of the receiver is input through the user input unit 103, the virtual file module 107 disconnects the virtual driver by releasing the virtual driver of the storage unit 108. The broadcast receiver shuts down the system when the virtual driver is disconnected.

6 is a flowchart illustrating a broadcast program reproduction in a virtual file module according to an embodiment of the present invention.

Operation 310 shown in FIG. 6 means the virtual driver connection state described above. Therefore, in the description of FIG. 6, the virtual driver connection state will be described.

In step 600, the controller 102 determines whether there is a regeneration request. When the playback request is received, the control unit 102 provides the program input unit 101 with the list of broadcast contents stored in the storage unit 108 through the virtual file module 107 in step 602.

In step 604, the user selects a list to play from the list of broadcast contents provided through the program input unit 101. If the list to be played is selected, the broadcast content recorded in step 608 performs a playback procedure. The playback procedure of step 608 may be a process of file call, decryption, and reverse authentication.

The file call refers to finding a corresponding broadcast content file stored in the storage unit 108 under the control of the virtual file system management unit 202 and transferring the file to the program input unit 101. In this process, it is checked whether the broadcast content file called up is encrypted when it is recorded. If encrypted, the codec 203 performs a decoding operation to perform a decoding operation. In addition, if the authentication function is included, the authentication unit 201 performs a reverse authentication process and transmits it to the program input unit 101. Referring to the playback procedure, for example, the virtual file system management unit 202 of the virtual file module stores a list of broadcast contents stored in the storage unit 108 through the data input / output unit 204 and the file input / output unit 205. To the program input unit 101.

The control unit 102 shows the broadcast content list delivered to the program input unit 101 to the viewable display device such as a monitor through the playback unit 110. The broadcast content list displayed on the monitor is in the form of a virtual file. The data structure of the virtual file is composed of the VFS index 410 and the VFS data 420 as shown in FIG. The user may select a desired file among broadcast contents stored in the virtual file system data 420. The virtual file system manager 202 determines whether the broadcasting content selected by the user includes an encryption and authentication function during recording. The virtual file system manager 202 performs the decoding process if the broadcast content includes the encryption function, and performs the reverse authentication if the broadcast content includes the authentication function. In addition, through the decoding process, broadcast content having a virtual file structure is converted into a file that can be reproduced by the receiver.

The broadcast content file, which has undergone the decoding process and the reverse authentication step, is transferred to the program input unit 101. The broadcast content file delivered to the program input unit 101 is output to the display device such as a monitor through the playback unit 110. In step 610, information on the broadcast content file to be played is provided on the screen and playback starts.

In step 612, the control unit 102 determines whether playback is complete. The end of playback may be determined by the user requesting the end of playback through the user input unit 103 or by a virtual file system index (file size or time information) indicating information of the recorded broadcast content file. . If the playback is not finished, step 608 is continued. If playback is complete, playback processing ends.

7 is a block diagram illustrating an external file input / output unit according to an exemplary embodiment of the present invention.

An internal block configuration of the external file input / output unit will be described with reference to FIG. 7. In the present invention, only external file output will be described.

The external file input / output unit 109 is a device used to copy a file stored in the storage unit 108 of the receiver to the external storage device 208. The virtual file module 107 outputs a file in a form that can be recognized by the external storage device 208 of the broadcast content stored in the storage 108.

The external file input / output unit 109 may include an input unit 700 for receiving a file to be output through the virtual file module 107 and an output unit 702 for exporting the input file to the outside. In addition, the external file input / output unit 109 may add an additional function unit 710 to the broadcast content input to the input unit 700. When the additional function unit 710 is added, the additional function unit 710 may include an encryption unit 712, a packaging unit 720, and a program converter 711. Accordingly, the broadcast content is processed through at least one of the respective internal components included in the additional function unit 710.

The encryption unit 712 may output an external file input / output unit 109 by performing an encryption function on the external file input / output unit 109 when it is desired to be distributed only to a specific person or a target device when outputting to the external storage device 208. The packaging unit 720 may output the broadcast content delivered from the input unit 700 in a specific file format (eg, a DVB file format or an MP4 file format). In addition, the packaging unit 720 may include a licensing unit 721. That is, the packaging unit 720 may include the licensing unit 721 to output the broadcast content in a specific file format, thereby processing the broadcast content to be used in a limited range. The program converter 711 converts the resolution or file format of the broadcast content.

The additional function unit 710 may perform all or a part of each function and transmit it to the output unit 702. If necessary, the broadcast content input to the input unit 700 may be delivered to the output unit 702 without passing through the additional function unit 710. The output unit 702 is connected to the external storage device 208, so that the broadcast content of the internal block of the external file input / output unit 109 can be copied to the external storage device 208. In the above process, the external storage device 208 may be a hard disk, a USB, a CD, or the like, and may also include a hard disk area other than the virtual file system of the receiving recording device. That is, a space stored in an accessible form in an external program (for example, an explorer of a PC) in a receiving recording device such as a PC may be viewed as an external storage device.

8 is a control flowchart of copying broadcast content from an external file input / output unit to an external storage device according to an exemplary embodiment of the present invention.

Operation 310 shown in FIG. 8 means the virtual driver connection state described above. Therefore, in the description of FIG. 8, the virtual driver connection state will be described.

In step 804, the controller 102 transmits the broadcast content in the broadcast receiver storage 108 to the input unit 700 of the external file input / output unit 109 through the virtual file module 107. At this time, if the broadcast content stored in the storage unit 108 is encrypted and stored, the virtual file module 107 must perform a decryption function. In addition, the broadcast content input to the input unit 700 in this step should be converted into a form that can be recognized by the external storage device 208.

In operation 806, the user selects whether to use the additional function unit 710 for the broadcast content input to the input unit 700. If the additional function is not needed, the broadcast content of the input unit 700 proceeds to step 810 and copies the broadcast content to the external storage device 208. On the other hand, if the additional function is selected, the broadcast content of the input unit 700 in step 808, the encryption unit 712 to increase the security, the packaging unit 720 to make a specific file format, the program to change the resolution or file format The change unit 711 is performed. In this case, the additional function may perform all or part of each function according to the needs of the user. The broadcast content performing the additional function is input to the output unit 702 of the external file input / output unit 109. In step 810, the broadcast content is output to the external storage device 208 through the output unit 702, the user can copy the desired broadcast content.

1 is a block diagram of a broadcast content protection device according to an embodiment of the present invention;

2 is a block diagram of a virtual file module according to an embodiment of the present invention;

3 is a control flowchart of setting a virtual file area in a virtual file module according to an embodiment of the present invention;

4 is a data structure of a virtual file system according to an embodiment of the present invention;

5 is a broadcast program recording processing method through a virtual file module according to an embodiment of the present invention;

6 is a flowchart of a broadcast program playing process through a virtual file module according to an embodiment of the present invention;

7 is a configuration apparatus of an external file input / output unit according to an embodiment of the present invention;

8 is a flowchart illustrating a method of copying broadcast content to an external storage device using an external file input / output unit according to an embodiment of the present invention.

Claims (10)

In the device for recording broadcast content, A control unit which controls setting of a channel to be recorded and controls recording time and file conversion; A program input unit for receiving a broadcast signal and tuning the channel set by the controller to output the broadcast content; A virtual file module for converting the outputted broadcast content into a virtual file dedicated to a virtual file system under the control of the controller; And a storage unit for storing the converted virtual file. The method of claim 1, The virtual file module, When the file is output to the outside, the virtual file stored in the storage unit is decoded into the broadcast content under the control of the controller. And an external file input / output unit configured to output the decoded broadcast content to an external storage device under control of the controller. The method of claim 2, The external file input and output unit, An encryption unit for encrypting the decrypted broadcast content; A packaging unit converting the decoded broadcast content into a predetermined file format; And at least one of a program converter for converting the resolution or file format of the decoded broadcast content. 4. The method according to any one of claims 1 to 3, The virtual file module, A codec for converting the output broadcast content into the virtual file; A data input / output unit for outputting the converted virtual file to the storage unit; And a virtual file system manager configured to control operations of the codec and the data input / output unit under the control of the controller. 5. The method of claim 4, The virtual file module, And an authentication unit configured to receive the broadcast content and compare the user information input through the control unit with user authentication information previously stored in the storage unit to provide the input broadcast content to the codec. 6. The method of claim 5, When playing the stored file, the codec is, Decrypts the virtual file transferred from the data input / output unit, And the authentication unit performs a reverse authentication of the decoded broadcast content under the control of the virtual file system manager to provide the playback unit to play the broadcast content. The method of claim 6, Wherein, And a decoder to decode the broadcast content and a decoder to decode the broadcast content. In the method for recording broadcast content, Receiving a broadcast content by tuning a preset channel; Setting a virtual file area which is an area for storing a virtual file dedicated to a virtual file system in a storage area when a recording of the broadcast content is requested; And converting the received broadcast content into the virtual file and storing the received broadcast content in the set virtual file area. 9. The method of claim 8, And copying the stored broadcast content to an external storage device when copying the broadcast content to an external storage device. 10. The method according to claim 8 or 9, And reproducing the broadcast content when the received broadcast content is required to be reproduced.

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