KR20190085780A - Display device and method for operating thereof - Google Patents

Abstract

A display device according to an embodiment of the present invention includes: a broadcast receiving unit which receives broadcast signals of a reception restriction channel; a demultiplexing unit which demultiplexes the received broadcast signals; a CAM which obtains a PID of a packet, in which content data is included, from the demultiplexed broadcast signals; an SI unit which sets the obtained PID in the demultiplexing unit, obtains packets corresponding to the PID, and obtains content data included in the obtained packets; and a storage unit which stores the content data. The display device is able to download various content data from broadcast signals without being connected to the outside via network.

Description

[0001] DISPLAY DEVICE AND METHOD FOR OPERATING THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a display device, and more particularly, to a display device and a method of operating the same.

A display device such as a smart TV recently appeared can provide not only broadcasting but also various services and functions. For example, the display device may store content having various file formats in a memory, and directly reproduce the stored content using a corresponding codec or the like. That is, the display device can perform not only broadcast but also a content playback apparatus for playing back contents such as a moving picture file and a music file.

Such content can be transmitted to a display device via a wired network or a wireless network. However, in the case of a display device that does not have such a network function, a display device installed in an environment where the network is not supported, or a display device that does not have an application for downloading the content, it may not be possible to acquire the content. Accordingly, although the display device supports the content playback function, there is a fear that the function is limited due to simple broadcast video reception and output.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device capable of downloading various contents data from a broadcasting signal without being connected to the outside through a network.

The present invention also provides a display device capable of ensuring profitability and security by allowing content data included in a broadcast signal to be downloaded only from an authorized display device, and an operation method thereof.

A display apparatus according to an embodiment of the present invention includes a broadcast receiver for receiving a broadcast signal of a receive-restricted channel, a demultiplexer for demultiplexing a received broadcast signal, a PID of a packet including content data from a demultiplexed broadcast signal, An SI unit for setting the obtained PID in the demultiplexer, obtaining packets corresponding to the PID, and obtaining content data included in the obtained packets, and a storage unit for storing the content data .

According to an embodiment, the PID of a packet containing the content data may be varied based on a change in time or a change in content.

According to an embodiment, the CAM may acquire at least one of video data or audio data of the demultiplexed broadcast signal, descramble the acquired data, obtain PID generation information from the descrambled data, And obtain the PID based on the obtained PID generation information.

The CAM may include acquisition information for acquiring the PID from the acquired PID generation information, and may acquire the PID using the PID generation information and the acquisition information.

According to an embodiment, the acquisition information may be stored as a code or a key.

The display apparatus may further include an audio / video decoder for decoding the descrambled data and an output unit for outputting the decoded data, wherein the output unit includes at least one of a display unit and an audio output unit.

The output data may include information of the currently downloaded content and download schedule information of the contents.

According to an embodiment, the demultiplexed broadcast signal comprises at least one of a video data packet, a voice data packet, and an SI data packet, the CAM including at least one video data packet, The PID generation information may be extracted from the predetermined area of the packet and the PID may be acquired based on the extracted PID generation information.

The SI unit may parse each of the received packets to obtain section data, and may combine the obtained section data to obtain the content data.

According to an embodiment, the content data is provided in an encrypted form, and the CAM may store decryption information of the content data.

Upon requesting execution of the content corresponding to the content data, the CAM may restore the content data using the decryption information, and output the decompressed content data through at least one of a display unit and an audio output unit .

A method of operating a display device according to an embodiment of the present invention includes receiving a broadcast signal of a receive-restricted channel, demultiplexing a received broadcast signal, demultiplexing a received PID of a packet including content data from a demultiplexed broadcast signal, Obtaining the packets corresponding to the PID based on the obtained PID, and storing the content data included in the obtained packets.

According to various embodiments of the present invention, a display device receives and stores a content file included in a digital broadcast signal, thereby obtaining various contents even in an environment where a network such as the Internet is not supported.

Also, the content provider can transmit the content file through the scrambled channel of the digital broadcasting, so that the content provider can receive the content data only by the display device including the authentication module such as the conditional access module (CAM). That is, the content provider can provide the content only to the display device of the authenticated user, thereby ensuring profitability and enhancing security.

In addition, since the PID of the packet containing the content data fluctuates without being fixed, it is possible to prevent an arbitrary display device from acquiring the content data due to the outflow of the PID.

1 is a block diagram illustrating a configuration of a display apparatus according to an embodiment of the present invention.
2 is a block diagram of a remote control device according to an embodiment of the present invention.
3 shows an example of an actual configuration of a remote control apparatus according to an embodiment of the present invention.
4 shows an example of utilizing a remote control device according to an embodiment of the present invention.
5 is a diagram schematically showing a broadcasting system including a display device according to an embodiment of the present invention.
6 is a block diagram illustrating configurations associated with operation of a display device according to an embodiment of the present invention.
FIGS. 7 and 8 are exemplary diagrams for schematically explaining a transmission / reception process of a broadcast signal in the broadcasting system of FIG.
9 is a flowchart illustrating an operation of a display apparatus according to an embodiment of the present invention.
10 is a ladder diagram specifically illustrating one embodiment related to the operation of the display device shown in FIG.
FIGS. 11 to 12 are diagrams for explaining a process in which a display apparatus acquires content data through parsing of a section of the FDT obtained from a broadcast signal and section data merging. FIG.
13 is an exemplary diagram showing an operation of the display device to output an image of a reception-restricted channel and acquire content data based on the embodiment shown in Fig.

Hereinafter, embodiments related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

A display device according to an embodiment of the present invention is an intelligent display device that adds a computer support function to a broadcast receiving function, for example, and is a device capable of reproducing contents of various file formats used in a computing environment, . ≪ / RTI > In order to reproduce the contents of the various file formats, a standardized general-purpose OS is used and various codecs can be embedded.

1 is a block diagram illustrating a configuration of a display apparatus according to an embodiment of the present invention.

1, the display apparatus 100 includes a broadcast receiving unit 130, an external device interface unit 135, a storage unit 140, a user input interface unit 150, a control unit 170, a local communication unit 173, A display unit 180, an audio output unit 185, and a power supply unit 190.

The broadcast receiving unit 130 may include a tuner 131, a demodulation unit 132, and a network interface unit 133.

The tuner 131 can tune to a specific broadcast channel according to the channel tuning command. The tuner 131 may receive a broadcast signal for the selected broadcast channel.

The demodulator 132 can separate the received broadcast signal into a video signal, an audio signal, and a data signal related to a broadcast program, and can restore the separated video signal, audio signal, and data signal into a form capable of outputting.

The external device interface unit 135 may receive an application or application list in an adjacent external device and may transmit the received application or application list to the control unit 170 or the storage unit 140.

The external device interface unit 135 may provide a connection path to an external device. The tear-off unit 135, which is an external device, can receive at least one of video and audio output from an external device and transmit the received video or audio to the control unit 170. The external device that can be connected to the external device interface unit 135 may be any one of a set top box, a Blu-ray player, a DVD player, a game machine, a sound bar, a smart phone, a PC, a USB memory, and a home theater.

The network interface unit 133 may provide an interface for connecting the display device 100 to a wired / wireless network including the Internet network. The network interface unit 133 can transmit or receive data to another user or another electronic device via the network connected thereto or another network linked to the connected network.

In addition, some content data stored in the display device 100 can be transmitted to another user registered in the display device 100 or a selected one of the other electronic devices or selected electronic devices.

The network interface unit 133 can access a predetermined web page through the connected network or another network linked to the connected network. That is, it is possible to access a predetermined web page through a network and transmit or receive data with the server.

The network interface unit 133 may receive the content or data provided by the content provider or the network operator. That is, the network interface unit 133 can receive content and related information of a movie, an advertisement, a game, a VOD, a broadcast signal, etc., provided from a content provider or a network provider through a network.

In addition, the network interface unit 133 can receive the update information and the update file of the firmware provided by the network operator, and can transmit the data to the Internet or the content provider or the network operator.

The network interface unit 133 can select and receive a desired application among applications open to the public via the network.

The storage unit 140 stores programs for signal processing and control in the controller 170, and can store image-processed video, audio, or data signals.

The storage unit 140 may perform a function for temporarily storing video, audio, or data signals input from the external device interface unit 135 or the network interface unit 133, It may also store information about the image.

The storage unit 140 may store a list of applications or applications input from the external device interface unit 135 or the network interface unit 133. [

The display apparatus 100 may reproduce and provide a content file (a moving picture file, a still picture file, a music file, a document file, an application file, etc.) stored in the storage unit 140 to a user.

The user input interface unit 150 may transmit a signal input by the user to the control unit 170 or may transmit a signal from the control unit 170 to the user. For example, the user input interface unit 150 may be implemented by various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, RF (Radio Frequency) communication, and infrared (IR) It is possible to receive and process control signals such as power on / off, channel selection, screen setting, and the like from the remote control device 200, or transmit control signals from the control unit 170 to the remote control device 200. [

The user input interface unit 150 may transmit a control signal input from a local key (not shown) such as a power key, a channel key, a volume key, and a set value to the controller 170.

The video signal processed by the controller 170 may be input to the display unit 180 and displayed as an image corresponding to the video signal. The video signal processed by the controller 170 may be input to the external output device through the external device interface 135. [

The audio signal processed by the control unit 170 may be output to the audio output unit 185 through audio. The voice signal processed by the control unit 170 may be input to the external output device through the external device interface unit 135.

In addition, the control unit 170 can control the overall operation in the display device 100. [

The control unit 170 may control the display device 100 according to a user command or an internal program input through the user input interface unit 150. The control unit 170 accesses the network and displays a list of applications or applications desired by the user, So that it can be downloaded into the portable terminal 100.

The control unit 170 can output the video or audio signal processed through the channel information selected by the user through the display unit 180 or the audio output unit 185.

The control unit 170 controls the operation of the external device through the external device interface unit 135 according to an external device video playback command received through the user input interface unit 150. For example, So that a video signal or a voice signal can be output through the display unit 180 or the audio output unit 185.

The control unit 170 may control the display unit 180 to display an image and may output the broadcast image input through the tuner 131 or the external input through the external device interface unit 135, The image input through the network interface unit or the image stored in the storage unit 140 may be displayed on the display unit 180. [ In this case, the image displayed on the display unit 180 may be a still image or a moving image, and may be a 2D image or a 3D image.

Also, the controller 170 may control the content stored in the display device 100, the received broadcast content, and the external input content input from the outside to be reproduced, and the content may be a broadcast image, an external input image, , A still image, a connected web screen, and a document file.

The local communication unit 173 can perform communication with an external device through wired or wireless communication. The short range communication unit 173 can perform short range communication with an external device. To this end, the short-range communication unit 173 is connected to the short-range communication unit 173 via Bluetooth, a Radio Frequency Identification (RFID), an Infrared Data Association (IrDA), an Ultra Wide Band (UWB), a ZigBee, (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The local communication unit 173 may communicate with the display device 100 and the wireless communication system through the wireless area networks or between the display device 100 and the other display device 100 or between the display device 100 and the display device 100. [ And can support wireless communication between networks in which the display device 100 (or an external server) is located. The short-range wireless communication network may be a short-range wireless personal area network.

Here, the other display device 100 is a wearable device (e.g., a smartwatch, smart glass, etc.) capable of interchanging data with the display device 100 according to the present invention a smart glass, an HMD (head mounted display), or a smart phone. The local communication unit 173 can detect (or recognize) the wearable device capable of communicating with the periphery of the display device 100. [ Further, when the detected wearable device is a device authenticated to communicate with the display device 100 according to the present invention, the control unit 170 transmits at least a part of the data processed by the display device 100 to the local communication unit 173 To the wearable device. Therefore, the user of the wearable device can use the data processed in the display device 100 through the wearable device.

The display unit 180 converts the video signal, the data signal, the OSD signal, the video signal, the data signal, and the like received from the external device interface unit 135 into R, G, and B signals, respectively, Signal can be generated.

On the other hand, the display device 100 shown in FIG. 1 is only an embodiment of the present invention. Some of the components shown may be integrated, added, or omitted depending on the specifications of the display device 100 actually implemented.

That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

1, the display apparatus 100 may include a tuner 131 and a demodulator 132 and may include a network interface unit 133 or an external device interface unit (not shown) 135 to reproduce the image.

For example, the display apparatus 100 may be divided into an image processing apparatus such as a set-top box for receiving broadcast signals or contents according to various network services, and a content reproducing apparatus for reproducing the content input from the image processing apparatus Can be implemented.

In this case, the operation method of the display device according to the embodiment of the present invention to be described below may be applied not only to the display device 100 as described with reference to FIG. 1, but also to the image processing device such as the separated set- 180 and an audio output unit 185. The audio output unit 185 may be connected to the input /

Next, a remote control apparatus according to an embodiment of the present invention will be described with reference to Figs. 2 to 3. Fig.

FIG. 2 is a block diagram of a remote control apparatus according to an embodiment of the present invention, and FIG. 3 shows an example of an actual configuration of a remote control apparatus 200 according to an embodiment of the present invention.

2, the remote control apparatus 200 includes a fingerprint recognition unit 210, a wireless communication unit 220, a user input unit 230, a sensor unit 240, an output unit 250, a power supply unit 260 A storage unit 270, a control unit 280, and a voice acquiring unit 290. [0034]

Referring to FIG. 2, the wireless communication unit 225 transmits / receives a signal to / from any one of the display devices according to the embodiments of the present invention described above.

The remote control device 200 includes an RF module 221 capable of transmitting and receiving signals to and from the display device 100 according to the RF communication standard and is capable of transmitting and receiving signals with the display device 100 according to the IR communication standard And an IR module 223. In addition, the remote control device 200 may include a Bluetooth module 225 capable of transmitting and receiving signals with the display device 100 according to the Bluetooth communication standard. The remote control apparatus 200 is provided with an NFC module 227 capable of transmitting and receiving signals to and from the display apparatus 100 in accordance with a NFC (Near Field Communication) communication standard. In accordance with a WLAN (Wireless LAN) communication standard, And a WLAN module 229 that can send and receive signals to and from the device 100.

The remote control device 200 transmits a signal containing information on the motion and the like of the remote control device 200 to the display device 100 through the wireless communication unit 220.

On the other hand, the remote control device 200 can receive a signal transmitted from the display device 100 through the RF module 221 and can transmit power to the display device 100 via the IR module 223, Off, channel change, volume change, and the like.

The user input unit 230 may include a keypad, a button, a touch pad, or a touch screen. The user can input a command related to the display device 100 to the remote control device 200 by operating the user input unit 230. [ When the user input unit 230 has a hard key button, the user can input a command related to the display device 100 to the remote control device 200 through the push operation of the hard key button. This will be described with reference to FIG.

Referring to FIG. 3, the remote control apparatus 200 may include a plurality of buttons. The plurality of buttons include a fingerprint recognition button 212, a power button 231, a home button 232, a live button 233, an external input button 234, a volume control button 235, a voice recognition button 236, A channel change button 237, an OK button 238, and a back button 239. [

The fingerprint recognition button 212 may be a button for recognizing the fingerprint of the user. In one embodiment, the fingerprint recognition button 212 is capable of a push operation and may receive a push operation and a fingerprint recognition operation. The power button 231 may be a button for turning on / off the power of the display device 100. The home button 232 may be a button for moving to the home screen of the display device 100. The live button 233 may be a button for displaying a real time broadcast program. The external input button 234 may be a button for receiving an external input connected to the display device 100. The volume control button 235 may be a button for controlling the volume of the volume output by the display device 100. The voice recognition button 236 may be a button for receiving the user's voice and recognizing the received voice. The channel change button 237 may be a button for receiving a broadcast signal of a specific broadcast channel. The confirmation button 238 may be a button for selecting a specific function, and the back button 239 may be a button for returning to a previous screen.

Fig. 2 will be described again.

When the user input unit 230 has a touch screen, the user can touch a soft key of the touch screen to input a command related to the display device 100 to the remote control device 200. [ In addition, the user input unit 230 may include various types of input means such as a scroll key, a jog key, and the like that can be operated by the user, and the present invention does not limit the scope of the present invention.

The sensor unit 240 may include a gyro sensor 241 or an acceleration sensor 243 and the gyro sensor 241 may sense information on the motion of the remote control device 200. [

For example, the gyro sensor 241 may sense information about the operation of the remote control device 200 on the basis of the x, y, and z axes, and the acceleration sensor 243 may sense the movement speed of the remote control device 200 And the like can be sensed. The remote control device 200 may further include a distance measuring sensor to sense the distance from the display unit 180 of the display device 100. [

The output unit 250 may output an image or voice signal corresponding to the operation of the user input unit 235 or corresponding to the signal transmitted from the display device 100. [ The user can recognize whether the user input unit 235 is operated or whether the display apparatus 100 is controlled through the output unit 250.

For example, the output unit 250 may include an LED module 251 that is turned on when the user input unit 235 is operated or a signal is transmitted to and received from the display device 100 through the wireless communication unit 225, a vibration module 253 for outputting sound, an acoustic output module 255 for outputting sound, or a display module 257 for outputting an image.

In addition, the power supply unit 260 supplies power to the remote control device 200, and if the remote control device 200 is not moved for a predetermined time, the power supply is interrupted to reduce power consumption. The power supply unit 260 may resume power supply when a predetermined key provided in the remote control device 200 is operated.

The storage unit 270 may store various types of programs, application data, and the like necessary for the control or operation of the remote control apparatus 200. [ If the remote control device 200 wirelessly transmits and receives signals through the display device 100 and the RF module 221, the remote control device 200 and the display device 100 transmit and receive signals through a predetermined frequency band .

The control unit 280 of the remote control device 200 stores information on a frequency band and the like capable of wirelessly transmitting and receiving a signal with the display device 100 paired with the remote control device 200 in the storage unit 270, can do.

The control unit 280 controls various matters related to the control of the remote control device 200. [ The control unit 280 transmits a signal corresponding to a predetermined key operation of the user input unit 235 or a signal corresponding to the motion of the remote control device 200 sensed by the sensor unit 240 through the wireless communication unit 225 100).

Also, the voice acquisition unit 290 of the remote control device 200 can acquire voice.

The voice acquisition unit 290 may include at least one microphone 291 and may acquire voice through the microphone 291.

Next, Fig. 4 will be described.

4 shows an example of utilizing a remote control device according to an embodiment of the present invention.

4A illustrates that the pointer 205 corresponding to the remote control device 200 is displayed on the display unit 180. In FIG.

The user can move or rotate the remote control device 200 up, down, left or right. The pointer 205 displayed on the display unit 180 of the display device 100 corresponds to the movement of the remote control device 200. [ In this remote control device 200, as shown in the figure, since the pointer 205 is moved according to the movement in the 3D space, it can be called a space remote controller.

4B illustrates that when the user moves the remote controller 200 to the left, the pointer 205 displayed on the display unit 180 of the display apparatus 100 moves to the left correspondingly.

Information on the motion of the remote control device 200 sensed through the sensor of the remote control device 200 is transmitted to the display device 100. The display device 100 can calculate the coordinates of the pointer 205 from the information about the motion of the remote control device 200. [ The display device 100 can display the pointer 205 so as to correspond to the calculated coordinates.

4C illustrates a case where the user moves the remote control device 200 away from the display unit 180 while the specific button in the remote control device 200 is depressed. Thereby, the selected area in the display unit 180 corresponding to the pointer 205 can be zoomed in and displayed.

Conversely, when the user moves the remote control apparatus 200 close to the display unit 180, the selection area within the display unit 180 corresponding to the pointer 205 may be zoomed out and displayed.

On the other hand, when the remote control device 200 moves away from the display unit 180, the selected area is zoomed out, and when the remote control device 200 approaches the display unit 180, the selected area may be zoomed in.

Further, the recognition of the upward, downward, and leftward / rightward movement can be excluded when a specific button in the remote control device 200 is pressed. That is, when the remote control device 200 moves away from or approaches the display unit 180, it is not recognized that the up, down, left, and right movements are recognized, and only the forward and backward movements are recognized. Only the pointer 205 is moved in accordance with the upward, downward, leftward, and rightward movement of the remote control device 200 in a state where the specific button in the remote control device 200 is not pressed.

On the other hand, the moving speed and moving direction of the pointer 205 may correspond to the moving speed and moving direction of the remote control device 200.

The pointer in the present specification means an object displayed on the display unit 180 in correspondence with the operation of the remote control device 200. [ Therefore, various shapes of objects other than the arrow shapes shown in the drawings are possible with the pointer 205. [ For example, it can be a concept that includes points, cursors, prompts, thick outlines, and so on. The pointer 205 may be displayed corresponding to a point on a horizontal axis or a vertical axis on the display unit 180 or may be displayed corresponding to a plurality of points such as a line or a surface Do.

Hereinafter, an operation in which the display apparatus 100 according to the embodiment of the present invention downloads content data of various file formats through a broadcast signal will be described with reference to FIGS. 5 to 13. FIG.

Hereinafter, the operation of the display apparatus 100 will be described with reference to a broadcasting information transmission standard SI of digital video broadcasting (DVB), which is a digital broadcasting standard. However, since the embodiment of the present invention is applied only to the DVB standard The present invention can be similarly applied to various digital broadcasting standards.

5 is a diagram schematically showing a broadcasting system including a display device according to an embodiment of the present invention.

5, the broadcasting system may include a plurality of content providers 510, a service provider 520, and a display device 100 corresponding to a client.

Each of the content providers 510 can produce and provide various contents. Such a content provider may include a terrestrial broadcast sender, a cable broadcast operator, a satellite broadcast sender, a personal content provider, and the like. On the other hand, the content providers 510 can produce and provide various services and applications in addition to the broadcast content.

The service provider 520 may package the content produced by the content providers 510 and provide it to the client (display device 100). For example, the service provider 520 may package at least one of the contents produced by various terrestrial broadcasts, cable broadcasts, satellite broadcasts, etc., for service and provide it to the display device 100.

The above-described content provider 510 and the service provider 520 may be the same entity. For example, the first content provider 511 may package the content produced by the first content provider 511 and provide the content to the display device 100 so that the functions of the service provider 520 can be performed together have.

On the other hand, some content providers may provide a scrambled channel so that only the display device 100 to which the viewing of the reception-restricted channel is authorized may output video or audio of the corresponding channel. For example, the reception-restricted channel may be a pay channel, a private channel, or the like that can be viewed only by paying a separate fee.

The display device 100 to which the viewing of the reception-restricted channel is authenticated can receive the broadcasting signal of the reception-restricted channel and descramble the broadcasting signal to output the video and / or audio. On the other hand, the unauthorized display device can not descramble the broadcast signal, and thus can not output the video and / or audio of the receive-restricted channel.

The display device 100 may receive various data such as a broadcast signal from the service provider 520 and may output the content including the video or audio based on the received data.

1, the display apparatus 100 may receive broadcast or other content through the broadcast receiving unit 130 or the network interface unit 133. [ However, when the display device 100 is installed in an environment where the network interface unit 133 is not provided or network connection is not supported, it is difficult for the user to use other contents except the broadcast content through the display device 100 .

In order to solve this problem, the content provider 510 according to the embodiment of the present invention can include downloadable content data in the broadcast signal of the reception-restricted channel, and the display device 100 can display the content data through the received broadcast signal Can be acquired and stored. This will be described in more detail below with reference to the drawings.

6 is a block diagram illustrating configurations associated with operation of a display device according to an embodiment of the present invention.

Referring to FIG. 6, the display apparatus 100 includes a demultiplexer 171, an audio / video (AV) decoder 172, a service information (SI) (173). ≪ / RTI > In FIG. 6, the configurations 170, 172, and 173 are included in the controller 170. That is, the controller 170 may be implemented as an integrated chip including the configurations 171, 172, and 173. However, the embodiments of the present invention are not limited thereto, and the configurations 171, 172, and 173 may be implemented as chips or modules separate from the main processor of the controller 170.

The demultiplexer 171 demultiplexes the packets included in the received broadcast signal into video, audio, service information (SI) data and the like and supplies them to the AV decoder 172, the SI decoder 174 of the SI unit 173 ).

The AV decoder 172 can decode the demultiplexed video data and audio data. The video and audio data decoded by the AV decoder 172 may be output through the display unit 180 and the sound output unit 185.

The SI unit 173 can process the SI data among the received broadcast signals. The SI decoder 174 may decode and store the received SI data.

The SI data has a skeleton similar to program and system information (PSI) of the MPEG system, and may be a set of tables having the same or similar purpose. In addition, each of the tables may be divided into several sections and transmitted.

The SI data may be used to display broadcast information or the like according to a user's request, or may be used by the demultiplexer 171 to separate a specific section included in the SI table of a broadcast signal received at a later time.

The service manager 175 can set the video / audio PID (packet identifier) of the currently selected channel in the demultiplexer 171. [ The demultiplexer 171 can separate video data, audio data, and the like included in the broadcast signal using the PID.

In addition, the display device 100 may include a conditional access module (CAM) 177 for descrambling the broadcast signal of the receive-limited channel. The CAM 177 may act as a kind of authentication module that allows the display device 100 to output video and / or audio of the reception-restricted channel. That is, the video and / or audio of the reception-restricted channel can be processed and reproduced only in the display device 100 including the CAM 177. [

For example, the CAM 177 may be implemented as a card or a chip inserted in a slot formed in the display device 100, or may be a separate module connected to the display device 100 through a USB port . The CAM 177 may be implemented as a software program module stored in the storage unit 140 of the display device 100 according to an embodiment.

The content provider scrambles (encrypts and encodes) the video data and the audio data of the reception-restricted channel, and the CAM 177 descrambles the video data and audio data demultiplexed by the demultiplexer 171 ) To the AV decoder 172. The AV decoder 172 can decode the descrambled image data and the audio data, and the decoded image data and the audio data can be output through the display unit 180 and the sound output unit 185.

On the other hand, the types of SI data included in the broadcast signal may vary. According to the embodiment of the present invention, the content provider of the receive-restricted channel can transmit downloadable content data to the display device 100 using a file data table (FDT) section of the SI table. The display apparatus 100 acquires a packet corresponding to the FDT section of the SI data using the PID of the FDT section and stores the content data included in the obtained packet in the storage unit 140, Even if it is not supported, it is possible to acquire music contents of MP3 format or various other contents. This will be described later in more detail with reference to FIG. 9 through FIG.

FIGS. 7 and 8 are exemplary diagrams for schematically explaining a transmission / reception process of a broadcast signal in the broadcasting system of FIG.

Referring to FIG. 7, a content provider (e.g., first content provider 511) may generate a broadcast signal of a receive-restricted channel. The broadcast signal may include a plurality of packets. For example, the plurality of packets may include voice data packets Audio1 to Audio2, video data packets Video1 to Video4, and other SI data packets. Particularly, among the SI data packets, FDT section packets (File1 to File2) may be included. The FDT section packets (File1 to File2) may include divided content data to be transmitted.

The content provider 511 may convert the plurality of packets into a transport stream TS through the packet multiplexer 700 and output the converted transport stream TS in the form of a broadcast signal. According to the embodiment, the packet multiplexing unit 700 may be included in the service provider 520. [

Referring to FIG. 8, the display apparatus 100 may receive a broadcast signal through a tuner 131, and may acquire a transport stream (TS) from the broadcast signal through a demodulator 132.

The demultiplexer 171 can classify audio data packets Audio1 to Audio2, video data packets Video1 to Video4, and other SI data packets from the transport stream TS. Further, the demultiplexer 171 can also classify the FDT section packets (File1 to File2) when having the PID of the FDT section.

In the above-described embodiment, when the PID of the FDT section has a fixed value, content data is acquired using the PID of the FDT section in a display apparatus other than the display apparatus 100 whose viewing of the reception restricted channel is authenticated There is a problem that can be. This may cause a decrease in the profitability of the content provider providing the content data, or may cause the security of the content data to be weakened.

According to the embodiment of the present invention, the content provider changes the PID of the FDT section according to a change of time or the like, and the CAM 177 acquires the PID of the FDT section from other data (video, audio, SI data) The above-described problem can be solved. This will be described with reference to FIGS. 9 to 10. FIG.

9 is a flowchart illustrating an operation of a display apparatus according to an embodiment of the present invention.

Referring to FIG. 9, the display apparatus 100 may receive a broadcast signal of a reception restricted channel (S100).

As described above with reference to FIG. 8, the broadcast receiver 130 of the display device 100 can receive the broadcast signal of the receive-restricted channel and obtain the transport stream TS.

The display apparatus 100 can demultiplex the received broadcast signal (S110).

The demultiplexer 171 of the display apparatus 100 uses the PID of the audio data packet, the PID of the video data packet, and the PID of the other SI data packet to transmit the transport stream TS of the received broadcast signal Multiplexed into at least one of voice data packets, video data packets, and SI data packets. At this time, the packets of the PID not set in the demultiplexer 171 may not be demultiplexed. For example, if the PID of the FDT section is not set in the demultiplexer 171, the demultiplexer 171 can not demultiplex the FDT section packet among the SI data packets.

The display apparatus 100 can descramble the image data and / or voice data included in the demultiplexed broadcast signal (S120).

The demultiplexed voice data packets and / or video data packets by the demultiplexer 171 may be transmitted to the CAM 177. The CAM 177 may descramble the voice data and / or image data contained in the voice data packets and / or the video data packets. To this end, the CAM 177 may include information (e.g., code or key for decoding) for descrambling of the audio data and / or the video data.

The descrambled image data and / or audio data may be decoded by the AV decoder 172 and output through the display unit 180 or the sound output unit 185. [

Based on the descrambled data, the display apparatus 100 may obtain a PID for receiving the content data provided from the content provider (S130).

The CAM 177 may obtain the PID of the FDT section including the content data when descrambling the audio data and / or the video data.

In one example, the voice data packet and / or the video data packet may include PID generation information for the CAM 177 to generate the PID of the FDT section. The PID generation information may be included in a predetermined area of the packet including the audio data and / or the video data. The PID generation information may be scrambled together with voice data and / or image data. Such PID generation information may be changed according to a change in time or a change in content to be transmitted. That is, the PID of the FDT section may also be changed according to the change of time or the change of the content to be transmitted. The CAM 177 may obtain PID generation information included in the predetermined area through descrambling of the voice data and / or the image data. The CAM 177 may store acquisition information for acquiring the PID of the FDT section from the acquired PID generation information. For example, the acquisition information may have the form of an algorithm, a code, a key, and the like. The CAM 177 may obtain the PID of the FDT section using the PID generation information and the acquisition information.

Alternatively, the content provider may include PID generation information in any predefined area of the video data packet, the voice data packet, and the SI data packet. The CAM 177 may store information on the predefined area and the CAM 177 may extract PID generation information from the predefined area of the received broadcast signal packets. The CAM 177 may obtain the PID of the FDT section using the extracted PID generation information and the acquired information.

The CAM 177 is not limited to the above-described example in which the CAM 177 acquires the PID of the FDT section. The CAM 177 extracts the FDT from the data included in the demultiplexed broadcast signal using methods similar to the above- The PID of the section can be obtained.

The display apparatus 100 may receive the packet corresponding to the acquired PID (S140), and may acquire and store the content data included in the received packet (S150).

The demultiplexer 171 can demultiplex the FDT section packet corresponding to the obtained PID from the broadcast signal.

The SI unit 173 can parse the obtained FDT section packet to obtain the content data included in the FDT section packet. For example, the SI unit 173 may parse each of a plurality of sequentially received FDT section packets to obtain section data, and may combine the obtained plurality of section data to obtain content data.

The SI unit 173 may store the obtained content data in the storage unit 140. [

Through the above-described steps, the display apparatus 100 can download the content provided from the content provider of the receive-restricted channel.

Then, the display device 100 can execute the stored content in response to a user's request or the like. For example, if the stored content is music content in the mp3 file format, the display device 100 may play the content by executing an mp3 playback application.

According to an embodiment, the stored content may be stored in an encrypted form. That is, the content provider can encrypt and provide the content data. In this case, the CAM 177 or the storage unit 140 may store the decryption information of the content data. The display device 100 can provide the content by restoring the content data using the decryption information. Accordingly, profitability and security can be improved by preventing unauthorized reproduction of downloaded content.

10 is a ladder diagram specifically illustrating one embodiment related to the operation of the display device shown in FIG.

10, as the CAM 177 is mounted or inserted into the display device 100 and connected to the display device 100, the display device 100 can be authenticated to enable viewing of the receive-restricted channel ( S200).

The CAM 177 may request the demultiplexing unit 171 to receive the broadcast signal of the corresponding reception restricted channel (S205) when the viewing request of the reception restricted channel is received by the user's operation of the remote control device 200 or the like.

The demultiplexer 171 demultiplexes the received broadcast signal when the broadcast signal of the receive-restricted channel is received through the broadcast receiver 130 (S210).

6, the demultiplexer 171 demultiplexes the broadcast signal into video data, audio data, and SI data. At this time, if the PID of the FDT section is not set in the demultiplexer 171, the FDT section packet of the SI data may not be demultiplexed.

The demultiplexer 171 can transmit the demultiplexed video data and / or audio data from the broadcast signal to the CAM 177 (S215). On the other hand, the demultiplexed SI data can be transmitted to the SI unit 173.

The CAM 177 descrambles the received video data and / or audio data (S220), and obtains the PID of the FDT section packet among the SI data based on the descrambled data (S225).

Embodiments related to how the CAM 177 obtains the PID of the FDT section packet have been described above with reference to FIG.

The CAM 177 transmits the PID of the acquired FDT section packet to the SI section 173 (S230), and the SI section 173 can request reception of the FDT section packet (S235). To this end, the service manager 175 of the SI unit 173 can set the PID of the FDT section packet in the demultiplexer 171. [

As the PID of the FDT section packet is set, the demultiplexer 171 demultiplexes and acquires the FDT section packets from the broadcast signal of the reception restricted channel (S240), and transmits the obtained FDT section packets to the SI unit 173 (S245). The FDT section packets may be composed of a plurality of FDT sections.

The SI unit 173, for example, the SI decoder 174 may separate the section data through parsing of the received FDT section packets and obtain the content data through merging of the separated section data (S250). The obtained content data may be stored in the storage unit 140 (S255).

Hereinafter, an embodiment related to the configuration of the FDT section and a process of acquiring content data will be described with reference to Figs. 11 to 12. Fig.

FIGS. 11 to 12 are diagrams for explaining a process in which a display apparatus acquires content data through parsing of a section of the FDT obtained from a broadcast signal and section data merging. FIG.

Referring to FIG. 11, an FDT section (or an FDT section packet) may be composed of a header and a payload. The header may include various information such as a PID, a section number, and a last section number as information related to the FDT section, for example. The payload may include section data corresponding to a part of the content data.

For example, when the capacity of the content data is larger than the payload capacity (for example, 4093 bytes) of the FDT section, the content provider divides the content data into a plurality of section data, and a plurality of FDTs Sections.

Accordingly, the section number of the FDT section may indicate the order or number of section data, and the last section number (last_section_number) may indicate the number of section data. For example, if the last section number (last_section_number) is N, the SI decoder 174 obtains N FDT sections and parses each of the obtained N FDT sections to obtain section data (Section Data 1 to Section Data N) Can be obtained.

Referring to FIG. 12, the SI decoder 174 can sequentially obtain the content data by merging the obtained section data (Section Data 1 to Section Data N) in order. The obtained content data is stored in the storage unit 140 and may be provided by a user's request or the like later.

13 is an exemplary diagram showing an operation of the display device to output an image of a reception-restricted channel and acquire content data based on the embodiment shown in Fig.

For example, the receive-restricted channel according to the embodiment of the present invention may function as a channel for providing a download service of the content.

Referring to FIG. 13, the display apparatus 100 can display the image 1300 of the reception-restricted channel through the display unit 180.

The image 1300 may include a download screen 1310 indicating information on the content currently being downloaded and a schedule screen 1320 indicating a download schedule of the content.

The download screen 1310 can display the information 1311 of the content currently being downloaded and the download progress 1312.

The schedule screen 1320 may include a list of downloadable contents over time. The user can download the desired content as the desired content is viewed at the time the content is downloaded.

The content provider may provide the display device 100 with image data including the download screen 1310 and the schedule screen 1320. [ The display device 100 can descramble the received image data and display the received image data through the display unit 180. [ Although not shown, the content provider may provide audio data that informs the download schedule or the information of the content currently being downloaded, together with the video data. The display device 100 can descramble the received voice data and output it through the acoustical output unit 185.

In addition, the content provider can transmit the content data of the content being displayed on the download screen 1310 using the FDT section of the SI table. The display apparatus 100 can acquire the content by downloading the content data using the PID of the FDT section.

Using this, the content provider can provide various contents to the user through a plurality of reception restriction channels or a plurality of CAMs. For example, if the content provider provides music content, the content provider may be able to provide music content by genre through a plurality of reception limiting channels or a plurality of CAMs.

That is, according to the embodiment of the present invention, even when a user uses a display device not supported by the network such as the Internet or a display device installed in an environment where the network is not supported, the user can download the content through the digital broadcast signal.

In addition, since the PID of the FDT section including the content data is changed without being fixed, it is possible to improve profitability and security by providing only the display device of the user authenticated through the reception restricted channel.

According to an embodiment of the present invention, the above-described method can be implemented as a code readable by a processor on a medium on which a program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like.

The above-described display device is not limited to the configuration and method of the above-described embodiments, but the embodiments may be configured such that all or some of the embodiments are selectively combined so that various modifications can be made. It is possible.

Claims (19)

In the display device,
A broadcast receiver for receiving a broadcast signal of a scrambled channel;
A demultiplexer for demultiplexing the received broadcast signal;
A conditional access module (CAM) for obtaining a packet identifier (PID) of a packet including content data from a demultiplexed broadcast signal;
Sets the obtained PID in the demultiplexer,
Obtain packets corresponding to the PID,
A service information (SI) unit for acquiring content data included in the obtained packets; And
And a storage unit for storing the content data. The method according to claim 1,
Wherein a PID of a packet including the content data is varied based on a change in time or a change in content. The method according to claim 1,
In the CAM,
At least one of video data or audio data of the demultiplexed broadcast signal,
The obtained data is descrambled,
Obtains PID generation information from the descrambled data, and obtains the PID based on the obtained PID generation information. The method of claim 3,
In the CAM,
And acquisition information for acquiring the PID from the acquired PID generation information,
And acquires the PID using the PID generation information and the acquisition information. 5. The method of claim 4,
Wherein the acquisition information is stored as a code or a key. The method of claim 3,
An audio / video decoder for decoding the descrambled data; And
And an output unit for outputting decoded data,
Wherein the output unit includes at least one of a display unit and an audio output unit. The method according to claim 6,
The data to be output is,
Information of the currently downloaded content, and download schedule information of the content. The method according to claim 1,
Wherein the demultiplexed broadcast signal includes at least one of an image data packet, a voice data packet, and a service information (SI) data packet,
In the CAM,
Extracting PID generation information from the predetermined one of the at least one video data packet, the audio data packet, and the SI data packet,
And obtains the PID based on the extracted PID generation information. The method according to claim 1,
The SI unit,
Parsing each of the received packets to obtain section data,
And acquires the content data by merging the obtained section data. The method according to claim 1,
The content data is provided encrypted,
And decryption information of the content data is stored in the CAM. 11. The method of claim 10,
Upon execution of the content corresponding to the content data,
In the CAM,
Restoring the content data using the decryption information,
And outputs the restored content data through at least one of a display unit and an audio output unit. A method of operating a display device,
Receiving a broadcast signal of a receive-restricted channel;
Demultiplexing the received broadcast signal;
Obtaining a PID of a packet including content data from a demultiplexed broadcast signal;
Obtaining packets based on the obtained PID, the packets corresponding to the PID; And
And storing the content data included in the obtained packets. 13. The method of claim 12,
Wherein a PID of a packet including the content data is varied based on a change in time or a change in content. 13. The method of claim 12,
The step of acquiring the PID comprises:
Demodulating at least one of video data or audio data of the demultiplexed broadcast signal;
Obtaining PID generation information from the descrambled data; And
And obtaining the PID based on the obtained PID generation information. 15. The method of claim 14,
Decoding the descrambled data; And
And outputting the decoded data using at least one of a display unit and an audio output unit. 16. The method of claim 15,
Wherein the decoded data comprises:
Information of the currently downloaded content, and download schedule information of the content. 13. The method of claim 12,
The step of acquiring the PID comprises:
Extracting PID generation information from a predefined area of the video data packet, the voice data packet, and the SI data packet of the demultiplexed broadcast signal; And
And obtaining the PID based on the extracted PID generation information. 13. The method of claim 12,
Wherein the step of storing the content data comprises:
Parsing each of the obtained packets to obtain section data; And
And merging the obtained section data to obtain the content data. 13. The method of claim 12,
The content data is provided encrypted,
Receiving an execution request of the content corresponding to the content data;
In response to the received request, restoring the content data using the decryption information; And
And outputting the restored content data through at least one of a display unit and an audio output unit.

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