KR101835325B1 - Digital system and method of processing service data thereof - Google Patents

Abstract

Disclosed herein are a method for processing service data in a digital system and a digital system according to the present invention. An example of a service data processing method in a server in a digital system according to the present invention includes receiving device information from a digital device, transmitting a group identifier to which the digital device belongs based on the received device information, Dividing the service data including the received program and the thumbnail image data together with the identifier, processing and storing the service data based on the group identifier, and transmitting the stored service data to the corresponding digital device based on the group identifier An example of a method for processing service data in a digital device in a digital system according to the present invention includes the steps of transmitting device location information from a first digital device to a networked data server, On the basis of information Receiving the service data and outputting the service data to the screen, and transmitting the channel selection command to the second digital device based on the output service data.

Description

Technical Field [0001] The present invention relates to a digital system and a method for processing service data in a digital system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital system including a digital device and more particularly to a system and method for mutual authentication, data transmission / The present invention relates to a method for providing a service with improved quality in terms of quantity and quality through a service,

The worldwide analogue-to-digital broadcasting environment is rapidly changing.

Digital broadcasting is more resistant to external noise than conventional analog broadcasting, and has a small data loss, is advantageous for error correction, and has a high resolution to provide a clearer picture. In addition, in the digital broadcasting environment, unlike the analog broadcasting environment, the bidirectional service can be provided.

Such digital broadcasting is mainly performed through media such as terrestrial, satellite, and cable. Recently, however, digital broadcasting has been widely used for real-time broadcasting of digital contents through IP (Internet Protocol) real-time broadcasting, and CoD (Contents on Demand).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and method for providing a channel or service coverage of a single digital device in a digital system including at least one server and a plurality of digital devices, or service coverage.

Another object of the present invention is to make available related service data not only between a server and a digital device in a digital system but also between digital devices.

Another object of the present invention is to provide a service guide that is more quantitatively and / or qualitatively improved by allowing a digital device to acquire a richer service data than the conventional one.

According to an aspect of the present invention, there is provided a method of processing service data in a server in a digital system, the method comprising: receiving device information from a digital device; Transmitting a group identifier to which the digital device belongs based on the received device information; Dividing the service data including the received program and the thumbnail image data together with the group identifier, and processing the divided data; And transmitting the service data stored on the basis of the group identifier to the corresponding digital device.

An example of a method of processing service data in a digital device in a digital system according to the present invention comprises the steps of transmitting device location information from a first digital device to a networked data server; Receiving service data based on device location information analyzed from the data server and outputting the received service data to a screen; And transmitting the channel selection command to the second digital device based on the output service data.

Here, the device location information may be at least one of an original network identifier, a home code (ZIP code), and GPS information to which the first digital device belongs.

And transmitting the channel selection command includes: transmitting a device identifier in an http format and requesting a key for data encryption to a second digital device; Receiving a response code and a requested encryption key from the second digital device; And encrypting the service list of the program displayed on the current screen using the received encryption key, and transmitting the encrypted service list to the second digital device.

The transmitting of the channel selection command may further include: transmitting a security authentication code for coupling with the second digital device; And coupling according to a response of the second digital device.

The first digital device extracts the URL information from the service data received from the data server and extracts the URL information from the service data received from the data server according to the extracted URL information. You can download a thumbnail image and service it.

The first digital device may be a mobile terminal, and the second digital device may be a digital television receiver.

An example of a digital system for processing service data according to the present invention is a digital system that transmits device location information to a data server connected to a network, receives service data based on device location information analyzed from the data server, And a first digital device for transmitting a channel selection command to the second digital device based on the output service data.

Here, the device location information may be at least one of an original network identifier, a home code (ZIP code), and GPS information to which the first digital device belongs.

The digital system stores service data including URL information for downloading program data and a thumbnail image, compares and analyzes the received device location information with previously stored device information, And a data server for extracting and transmitting the service data of the corresponding group.

In transmitting the channel selection command, the first digital device transmits a device identifier in the http format, requests a key for data encryption from the second digital device, Upon reception of the encryption key, the service list of the program displayed on the current screen can be encrypted using the received encryption key and transmitted to the second digital device.

If the transmitted service list is a valid channel, the second digital device can reproduce the service.

In addition, if the transferred service list is invalid, the second digital device may return a non-reproducible response code to the first digital device or transmit the service list to the third digital device to request reproduction.

In transmitting the channel selection command, the first digital device transmits a security authentication code for coupling with the second digital device, and may couple according to a response of the second digital device.

The first digital device may extract URL information in service data received from the data server, and download a thumbnail image according to the extracted URL information.

The first digital device may be a mobile terminal and the second digital device may be a digital television receiver.

According to the present invention,

First, in a digital system including at least one server and a plurality of digital devices, a channel or service coverage of one digital device is expanded There is an effect that can be done.

Second, service metadata that is richer than conventional ones can be acquired in one digital device, and thus it is possible to provide a service that is quantitatively and / or qualitatively improved to a user.

Third, service data can be shared through servers, digital devices, digital devices, and SNS in a digital system.

1 is a schematic view of an example of a digital system including a digital device according to the present invention,
2 is a diagram illustrating an example of a digital device according to the present invention,
3 is a view showing another example of a digital device according to the present invention,
4 is a block diagram illustrating an example of the configuration of the controller 370 shown in FIG.
5 is a view showing remote control devices of a digital device according to the present invention,
6 is a diagram illustrating an example of a method of acquiring EPG / thumbnail image / channel browser service data,
7 is a view for explaining an example of a digital system according to the present invention,
FIG. 8 is a diagram for explaining an example of a process of updating EPG data in a data server according to the present invention.
9 is a diagram illustrating a method of transmitting service data from a digital device to a data server,
FIG. 10 is a view for explaining another example of the digital system configuration according to the present invention,
11 is a view showing an example of EPG and / or thumbnail image service data provided according to the present invention;
12 is an example of a system schematic diagram for explaining the process of processing service data in the digital system according to the present invention,
FIG. 13 is a diagram illustrating a process of transmitting / receiving service data between digital devices according to the present invention.
FIG. 14 is a diagram illustrating a process for transmitting and receiving service data between digital devices according to the present invention;
15 is a diagram illustrating a service data transmission / reception process between a data server and digital devices,
16 is a diagram illustrating a service data transmission method between digital devices,
17 is a view for explaining an example of a screen of a digital device receiving service data according to the present invention,
18 is a diagram illustrating a service control process between digital devices according to the present invention, and
FIG. 19 is an example of a flowchart illustrating a service data processing method in a digital system according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The suffix "module" and " part "for components used in the following description are given merely for ease of description, and the" module "and" part "

Meanwhile, an example of a digital device according to the present invention described in the present invention is an intelligent device that adds a computer support function to a broadcast reception function, for example, A handy input device, a touch screen or a space remote controller. The digital device can be connected to the Internet and a computer through the support of a wired or wireless Internet function, and can perform functions such as e-mail, web browsing, banking, or game. A standardized general purpose operating system (OS) can be used for these various functions. In addition, since a variety of applications can be freely added or deleting on a general-purpose OS kernel, for example, a digital device can perform various user-friendly functions . Such digital devices include, for example, a network TV, an HBBTV (Hybrid Broadcast Broadband TV), a smart TV (Smart TV), etc. In some cases, a PDA (Personal Digital Assistant) May also be included.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings and the attached drawings. However, the present invention is not limited or limited by the following embodiments.

In addition, while the term used in the present specification selects the general term that is widely used in the present invention while considering the function of the present invention, it may vary depending on the intention or custom of a person skilled in the art or the emergence of a new technique. In addition, in certain cases, there may be a term arbitrarily selected by the applicant, in which case the meaning thereof will be described in the description of the corresponding invention. Therefore, it is intended that the terminology used herein should be interpreted based on the meaning of the term rather than on the name of the term, and on the entire contents of the specification.

1 is a diagram schematically showing an example of a digital system including a digital device according to the present invention.

1, an example of a digital system including a digital device according to the present invention includes a content provider (CP) 10, a service provider (SP) 20, a network provider A network provider (NP) 30 and a home network end user (HNED) (Customer) 40. Here, the HNED 40 may be, for example, a network TV, a smart TV, an IPTV, or the like, as described above as the client 100, that is, the digital device according to the present invention.

The content provider 10 produces and provides various contents. 1, a terrestrial broadcaster, a cable SO (System Operator) or an MSO (Multiple SO), a satellite broadcaster, An Internet broadcaster, a private CPs, etc. The content provider 10 may provide various applications in addition to the broadcast content. I will explain in detail.

The service provider 20 can provide the contents provided by the contents provider 10 in a service package. For example, the service provider 20 of FIG. 1 can package and provide the first terrestrial broadcast, second terrestrial broadcast, cable MSO, satellite broadcast, various Internet broadcasts, applications, etc. to the user.

Meanwhile, the service provider 20 can provide a service to the client 100 side in a uni-cast or multi-cast manner. In the above, the unicast method is a method of transmitting data between one sender and one receiver at a ratio of 1: 1. For example, in the case of a unicast method, when a receiver requests data from a server, the server transmits the data to the receiver according to a request. On the other hand, the multi-cast method is a method of transmitting data to a plurality of recipients of a specific group. For example, a server transmits data to a plurality of pre-registered receivers at a time. An Internet Group Management Protocol (IGMP) protocol may be used for the multi-cast registration.

Also, the content provider 10 and the service provider 20 may be the same entity. For example, the content provider 10 can also perform the functions of the service provider 20 by producing content and providing it as a service package. The opposite is also possible.

The network provider 30 may provide a network for exchanging data between the server and the client 100. [

The client 100 can construct a home network and transmit / receive data.

On the server side in the digital system, conditional access or content protection may be used to protect the transmitted contents. In this case, on the client 100 side, means such as a cable card (CableCARD), a DCAS (Downloadable CAS) or the like can be used for the processing in response to the server-side restrictive reception or content protection.

In addition, the client 100 can use the two-way service through the network. In this case, the client 100 may perform the function of the content provider, and the existing service provider 20 may receive the same and transmit the same to another client.

2 is a diagram showing an example of a digital device according to the present invention. Here, FIG. 2 may correspond to the client of FIG. 1, for example, and may be a digital television receiver.

The digital device 200 includes a network interface 201, a TCP / IP manager 202, a service delivery manager 203, an SI decoder 204, A demultiplexer (Demux) 205, an audio decoder 206, a video decoder 207, a display A / V and OSD module 208, a service control manager A Service Discovery Manager 210, an SI & Metadata DB 211, a Metadata Manager 212, a Service Manager 213, a UI A manager 214 and the like.

The network interface unit 201 receives or transmits Internet Protocol (IP) packets through a network. That is, the network interface unit 201 receives services, contents, and the like from the service provider 20 through the network.

The TCP / IP manager 202 analyzes the IP packets received by the digital device 200 and the IP packets transmitted by the digital device 200, that is, the packet delivery between the source and the destination I am involved. The TCP / IP manager 202 classifies the received packets so as to correspond to an appropriate protocol and transmits the packets to the service delivery manager 205, the service discovery manager 210, the service control manager 209, the metadata manager 212, And outputs classified packets.

The service delivery manager 203 is responsible for controlling the received service data. For example, RTP / RTCP can be used to control real-time streaming data. When the real-time streaming data is transmitted using the RTP, the service delivery manager 203 parses the received data packet according to RTP and transmits it to the demultiplexer 205 or to the service manager 213 And stores it in the SI & meta data database 211. And feedbacks the network reception information to the server providing the service using the RTCP.

The demultiplexer 205 demultiplexes the received packets into audio, video, SI (System Information) data, and transmits them to the audio / video decoder 206/207 and the SI decoder 204, respectively.

The SI decoder 204 decodes, for example, service information such as PSI (Program Specific Information), PSIP, DVB-SI, and the like.

In addition, the SI decoder 204 stores the decoded service information in the SI & meta data database 211, for example. The stored service information can be read out and used by a corresponding configuration, for example, by a user's request. SI information related to an EPG service, a channel browser service, or the like according to a user's request can also be read from the SI & meta data database 211 in connection with the present invention. However, a more detailed description thereof will be described later.

The audio / video decoder 206/207 decodes the demultiplexed audio data and video data in the demultiplexer 205. The decoded audio data and video data are provided to the user through the display unit 208. [

The application manager can be configured, for example, including the UI manager 214 and the service manager 213. [ The application manager manages the overall state of the digital device 200, provides a user interface, and can manage other managers.

The UI manager 214 provides a GUI (Graphic User Interface) for a user by using an OSD (On Screen Display) or the like, and receives a key input from the user to perform an operation of the device according to the input. For example, upon receipt of a key input from the user regarding channel selection, the key input signal is transmitted to the service manager 213.

The service manager 213 controls a manager associated with a service such as the service delivery manager 203, the service discovery manager 210, the service control manager 209, and the metadata manager 212.

Also, the service manager 213 creates a channel map and selects a channel using the channel map according to the key input received from the user interface manager 214. The service manager 213 receives channel service information from the SI decoder 204 and sets an audio / video PID (Packet Identifier) of the selected channel in the demultiplexer 205. The PID thus set is used in the demultiplexing process described above. Accordingly, the demultiplexer 205 filters audio data, video data, and SI data using the PID.

The service discovery manager 210 provides information necessary for selecting a service provider that provides the service. Upon receiving a signal regarding channel selection from the service manager 213, the service discovery manager 210 searches for the service using the information.

The service control manager 209 is responsible for selection and control of services. For example, when a user selects IGMP or RTSP in the case of selecting a live broadcasting service such as an existing broadcasting system and selects a service such as VOD (Video On Demand), RTSP is used to select a service Selection, and control. The RTSP protocol may provide a trick mode for real-time streaming. In addition, the service control manager 209 can initialize and manage a session through the IMS gateway 250 using an IP Multimedia Subsystem (IMS) and a Session Initiation Protocol (SIP). The protocols are one embodiment, and other protocols may be used, depending on the implementation.

The metadata manager 212 manages the metadata associated with the service and stores the metadata in the SI & metadata database 211.

The SI & meta data database 211 stores service information decoded by the SI decoder 204, meta data managed by the meta data manager 212, and information necessary for selecting a service provider provided by the service discovery manager 210 do. In addition, the SI & meta data database 211 may store set-up data for the system and the like.

The SI & meta data database 211 may be implemented using a non-volatile RAM (NVRAM) or a flash memory.

Meanwhile, the IMS gateway 250 is a gateway for collecting functions necessary for accessing the IMS-based IPTV service.

3 is a diagram showing another example of a digital device according to the present invention.

3, an example of the digital device 300 according to the present invention includes a broadcast receiving unit 305, an external device interface unit 335, a storage unit 340, a user input interface unit 350, 370, a display unit 380, an audio output unit 385, a power supply unit 390, and a photographing unit (not shown). Here, the broadcast receiver 305 may include at least one tuner 310, a demodulator 320, and a network interface 330. In some cases, the broadcast receiver 305 may include a tuner 310 and a demodulator 320, but may not include the network interface 330, or vice versa. Although not shown, the broadcast receiver 305 includes a multiplexer to receive a demodulated signal from the demodulator 320 via the tuner 310 and a signal received through the network interface 330 May be multiplexed. In addition, the broadcast receiver 325 may include a demultiplexer to demultiplex the multiplexed signal or demultiplex the demodulated signal or the signal passed through the network interface 330, can do.

The tuner 310 tunes a channel selected by a user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna, and receives RF broadcast signals. Also, the tuner 310 converts the received RF broadcast signal into an intermediate frequency (IF) signal or a baseband signal.

For example, if the received RF broadcast signal is a digital broadcast signal, the signal is converted into a digital IF signal (DIF). If the received RF broadcast signal is an analog broadcast signal, the signal is converted into an analog baseband image or a voice signal (CVBS / SIF). That is, the tuner 310 can process both a digital broadcast signal and an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner 310 can be directly input to the controller 370. [

Also, the tuner 310 can receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Meanwhile, the tuner 310 sequentially tunes and receives RF broadcast signals of all broadcast channels stored through the channel memory function among the RF broadcast signals received through the antenna, and converts the RF broadcast signals into an intermediate frequency signal or a baseband signal .

The demodulator 320 receives and demodulates the digital IF signal DIF converted by the tuner 310. [

For example, when the digital IF signal output from the tuner 310 is the ATSC scheme, the demodulator 320 performs 8-VSB (8-Vestigal Side Band) demodulation, for example. In addition, the demodulation unit 320 may perform channel decoding. For this, the demodulator 320 includes a Trellis decoder, a de-interleaver, and a Reed-Solomon decoder to perform trellis decoding, deinterleaving, Lead solomon decoding can be performed.

For example, when the digital IF signal output from the tuner 310 is a DVB system, the demodulator 320 performs CODDMA (Coded Orthogonal Frequency Division Modulation) demodulation, for example. In addition, the demodulation unit 320 may perform channel decoding. For this, the demodulation unit 320 may include a convolution decoder, a deinterleaver, and a reed-solomon decoder to perform convolutional decoding, deinterleaving, and reed solomon decoding.

The demodulation unit 320 may perform demodulation and channel decoding, and then output a stream signal TS. At this time, the stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed. For example, the stream signal may be an MPEG-2 TS (Transport Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

Meanwhile, the demodulation unit 320 may be separately provided according to the ATSC scheme and the DVB scheme. That is, the digital receiver may include an ATSC demodulator and a DVB demodulator separately.

The stream signal output from the demodulation unit 320 may be input to the control unit 370. The control unit 370 controls demultiplexing, video / audio signal processing, and the like, and controls the output of audio through the display unit 380 and audio through the audio output unit 185.

The external device interface unit 335 provides an environment in which various external devices are interfaced to the digital receiver 300. [ To this end, the external device interface unit 335 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 335 is connected to the external device interface unit 335 through a communication network such as a DVD (Digital Versatile Disk), a Blu-ray, a game device, a camera, a camcorder, a computer (notebook, tablet), a smart phone, a Bluetooth device, (Cloud) or the like. The external device interface unit 135 transmits an image, voice, or data (including an image) signal input from the outside through a connected external device to the control unit 370 of the digital device. The control unit 370 may control the processed video, audio, or data signal to be output to a connected external device. To this end, the external device interface unit 335 may further include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The A / V input / output unit includes a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S-video terminal (analog), a DVI Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an RGB terminal, a D-SUB terminal, and the like.

The wireless communication unit can perform short-range wireless communication with other electronic devices. The digital receiver 300 may be implemented using, for example, Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, Digital Living Network Alliance (DLNA) And the like.

Also, the external device interface unit 335 may be connected to the various set-top boxes via at least one of the various terminals described above to perform input / output operations with the set-top box.

On the other hand, the external device interface unit 335 can receive an application or application list in an adjacent external device, and can transmit the received application or application list to the control unit 370 or the storage unit 340.

The network interface unit 330 provides an interface for connecting the digital device 300 to a wired / wireless network including the Internet network. The network interface unit 330 may include an Ethernet terminal or the like for connection to a wired network and may be a WLAN (Wireless LAN) (Wi- Fi, Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), and HSDPA (High Speed Downlink Packet Access) communication standards.

The network interface unit 330 can transmit or receive data with other users or other digital devices via the network to which it is connected or another network linked to the connected network. Particularly, it is possible to transmit some content data stored in the digital device 300 to another user registered in advance in the digital device 300 or a user selected in the other digital device or a selected digital device.

On the other hand, the network interface unit 330 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. In addition, content or data provided by a content provider or a network operator can be received. That is, it can receive contents such as a movie, an advertisement, a game, a VOD, a broadcast signal, and related information provided from a content provider or a network provider through a network. In addition, it can receive update information and an update file of firmware provided by the network operator. It may also transmit data to the Internet or a content provider or network operator.

In addition, the network interface unit 330 can select and receive a desired one of applications open to the public via the network.

The storage unit 340 may store a program for each signal processing and control in the control unit 370 or may store a signal-processed video, audio, or data signal.

The storage unit 340 may also function to temporarily store video, audio, or data signals input from the external device interface unit 335 or the network interface unit 330. The storage unit 340 may store information on a predetermined broadcast channel through a channel memory function.

The storage unit 340 may store a list of applications or applications input from the external device interface unit 335 or the network interface unit 330. [

In addition, the storage unit 340 may store various platforms described later.

The storage unit 340 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD Memory, etc.), RAM (RAM), and ROM (EEPROM, etc.). The digital device 300 can reproduce and provide the content file (moving image file, still image file, music file, document file, application file, etc.) stored in the storage unit 340 to the user.

FIG. 3 shows an embodiment in which the storage unit 340 is provided separately from the control unit 370, but the scope of the present invention is not limited thereto. That is, the storage unit 340 may be included in the controller 370.

The user input interface unit 350 transmits a signal input by the user to the controller 370 or a signal from the controller 370 to the user.

For example, the user input interface unit 350 may control power on / off, channel selection, screen setting, etc. from the remote control device 400 according to various communication methods such as an RF communication method and an infrared (IR) The control unit 370 can receive and process the signal or process the control signal of the control unit 370 to transmit the control signal to the remote control unit 400. [

Also, the user input interface unit 350 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 370.

The user input interface unit 350 transmits a control signal input from a sensing unit (not shown) that senses a gesture of the user to the control unit 370 or transmits a control signal from the control unit 370 to the sensing unit (Not shown). Here, the sensing unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, and the like.

The control unit 370 demultiplexes the streams input through the tuner 310, the demodulation unit 320, or the external device interface unit 335 or processes the demultiplexed signals to generate a signal for video or audio output And can output.

The video signal processed by the controller 370 may be input to the display unit 380 and displayed as an image corresponding to the video signal. The video signal processed by the controller 370 may be input to the external output device through the external device interface unit 335. [

The audio signal processed by the controller 370 may be output to the audio output unit 385 through audio. The voice signal processed by the control unit 370 may be input to the external output device through the external device interface unit 335.

Although not shown in FIG. 3, the control unit 370 may include a demultiplexing unit, an image processing unit, and the like.

The control unit 370 can control the overall operation of the digital device 300. [ For example, the controller 370 may control the tuner 310 to control tuning of a RF broadcast corresponding to a channel selected by the user or a previously stored channel.

The control unit 370 may control the digital device 300 by a user command or an internal program input through the user input interface unit 350. [ In particular, the user can access a network and download a list of applications or applications desired by the user to the digital device 300.

For example, the control unit 370 controls the tuner 310 so that a signal of a selected channel is input according to a predetermined channel selection command received through the user input interface unit 350. And processes video, audio or data signals of the selected channel. The control unit 370 allows the display unit 380 or the audio output unit 385 to output the video or audio signal processed by the user through the channel information selected by the user.

The control unit 370 may be an external device that is input through the external device interface unit 335, for example, a camera or a camcorder, according to an external device video playback command received through the user input interface unit 350. [ So that a video signal or a voice signal of the display unit 380 or the audio output unit 385 can be outputted.

Meanwhile, the control unit 370 can control the display unit 380 to display an image. For example, a broadcast image input through the tuner 310, an external input image input through the external device interface unit 335, an image input through the network interface unit, or an image stored in the storage unit 340 , And display on the display unit 380. At this time, the image displayed on the display unit 380 may be a still image or a moving image, and may be a 2D image or a 3D image.

Also, the control unit 370 can control to reproduce the content. The content at this time may be content stored in the digital device 300, received broadcast content, or external input content input from the outside. The content may be at least one of a broadcast image, an external input image, an audio file, a still image, a connected web screen, and a document file.

On the other hand, when entering the application view item, the control unit 370 can control to display a list of applications or applications that can be downloaded from the digital receiver 300 or from an external network.

The control unit 370, in addition to various user interfaces, can control to install and drive an application downloaded from the external network. Further, it is possible to control the display unit 380 to display an image related to the executed application by the user's selection.

Although not shown in the drawing, a channel browsing processing unit for generating a channel signal or a thumbnail image corresponding to an external input signal may be further provided.

The channel browsing processing unit receives a stream signal TS output from the demodulation unit 320 or a stream signal output from the external device interface unit 335 and extracts an image from an input stream signal to generate a thumbnail image . The generated thumbnail image may be directly or encoded and input to the controller 370. The generated thumbnail image may be encoded in a stream format and input to the controller 370. The control unit 370 can display a thumbnail list having a plurality of thumbnail images on the display unit 380 using the input thumbnail images. On the other hand, the thumbnail images in this thumbnail list can be updated in sequence or simultaneously. Accordingly, the user can easily grasp the contents of a plurality of broadcast channels.

The display unit 380 converts an image signal, a data signal, an OSD signal processed by the control unit 370 or a video signal and a data signal received from the external device interface unit 335 into R, G, and B signals, respectively Thereby generating a driving signal.

The display unit 380 may be a PDP, an LCD, an OLED, a flexible display, a 3D display, or the like.

Meanwhile, the display unit 380 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 385 receives a signal processed by the control unit 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs it as a voice. The voice output unit 185 may be implemented by various types of speakers.

In order to detect the gesture of the user, a sensing unit (not shown) having at least one of a touch sensor, a voice sensor, a position sensor, and an operation sensor may be further included in the digital receiver 300 . A signal sensed by a sensing unit (not shown) may be transmitted to the controller 370 through the user input interface unit 350.

On the other hand, a photographing unit (not shown) for photographing a user may be further provided. The image information photographed by the photographing unit (not shown) may be input to the control unit 370.

The control unit 370 may sense a gesture of the user by combining the images captured from the photographing unit (not shown) or the sensed signals from the sensing unit (not shown).

The power supply unit 390 supplies power to the digital device 300.

Particularly, it is possible to supply power to a control unit 370 that can be implemented in the form of a system on chip (SOC), a display unit 380 for displaying an image, and an audio output unit 385 for audio output .

To this end, the power supply unit 390 may include a converter (not shown) for converting the AC power to DC power. Meanwhile, for example, when the display unit 380 is implemented as a liquid crystal panel having a plurality of backlight lamps, an inverter (not shown) capable of PWM operation is further provided for variable luminance or dimming driving It is possible.

The remote control apparatus 400 transmits the user input to the user input interface unit 350. [ To this end, the remote control device 400 can use Bluetooth, RF (radio frequency) communication, infrared (IR) communication, UWB (Ultra Wideband), ZigBee, or the like.

Also, the remote control device 400 can receive the video, audio, or data signal output from the user input interface unit 350 and display it on the remote control device 400 or output voice or vibration.

The digital receiver 300 may be a digital broadcast receiver capable of processing digital broadcast signals of a fixed or mobile ATSC scheme or DVB scheme.

2 and 3 are examples according to the present invention, and each component may be integrated, added, or omitted according to specifications of a digital device actually implemented. That is, if necessary, two or more components may be combined into one component, or one component may be divided into two or more components. 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.

In addition, the digital device according to the present invention may further include a configuration that is omitted in some of the configurations shown in FIG. 2 and 3, the digital device does not have a tuner and a demodulator but may receive and reproduce contents through a network interface or an external device interface.

Meanwhile, the digital device may be a video signal processing device that performs signal processing of an image stored in the device or an input image. Other examples of the video signal processing apparatus include a set-top box, a DVD player, a Blu-ray player, a game machine, a computer, and the like described above excluding the display unit 380 and the audio output unit 385 shown in FIG. 3 Can be illustrated.

4 is a block diagram showing an example of the configuration of the controller 370 shown in FIG. The control unit 370 will be described in more detail with reference to FIGS. 3 and 4. FIG.

One example of the control unit 370 according to the present invention includes a demultiplexing unit 410, an image processing unit 420, an on-screen display (OSD) generating unit 440, a mixer 450, A Frame Rate Conveter (FRC) 455, and a formatter 460. The control unit 370 may further include a voice processing unit and a data processing unit.

The demultiplexer 410 demultiplexes the input stream. For example, the demultiplexing unit 410 may demultiplex the received MPEG-2 TS video, audio and data signals. The stream signal input to the demultiplexer 410 may be a stream signal output from the tuner 310 or the demodulator 320 or the external device interface 335.

The image processing unit 420 performs image processing of the demultiplexed image signal. To this end, the image processing unit 420 may include a video decoder 425 and a scaler 435.

The video decoder 425 decodes the demultiplexed video signal and the scaler 435 scales the decoded video signal so that the resolution of the decoded video signal can be output from the display unit 380.

The video decoder 425 may support various standards. For example, the video decoder 425 performs the function of an MPEG-2 decoder when the video signal is encoded in the MPEG-2 standard, and the video decoder 425 encodes the video signal in the DMB (Digital Multimedia Broadcasting) It can perform the function of the H.264 decoder.

On the other hand, the video signal decoded by the image processing unit 420 is input to the mixer 450.

The OSD generating unit 440 generates OSD data according to a user input or by itself. For example, the OSD generating unit 440 generates data for displaying various data in a graphic or text form on a screen of the display unit 380 based on a control signal of the user input interface unit 350, . The generated OSD data includes various data such as a user interface screen of the digital device 300, various menu screens, a widget, an icon, and audience rating information.

The OSD generation unit 440 may generate data for displaying broadcast information based on a caption of a broadcast image or an EPG.

The mixer 450 mixes the OSD data generated by the OSD generator 440 and the video signal processed by the video processor 320 and provides the mixed video signal to the formatter 460. Since the decoded video signal and the OSD data are mixed, the OSD is overlaid on the broadcast image or the external input image.

A frame rate conversion unit (FRC) 455 converts the frame rate of an input image. For example, the frame rate converter 455 may convert the frame rate of the input 60 Hz image to have a frame rate of 120 Hz or 240 Hz according to the output frequency of the display unit 380, for example. As described above, there are various methods for converting the frame rate. For example, when the frame rate is changed from 60 Hz to 120 Hz, the frame rate conversion unit 455 may insert the same first frame between the first frame and the second frame, Three frames can be inserted. As another example, when the frame rate is converted from 60 Hz to 240 Hz, the frame rate conversion unit 455 may insert and convert three or more identical or predicted frames between existing frames. On the other hand, when the frame conversion is not performed, the frame rate conversion unit 455 may be bypassed.

The formatter 460 changes the output of the input frame rate conversion unit 455 to match the output format of the display unit 380. For example, the formatter 460 may output R, G, and B data signals, and the R, G, and B data signals may be output as low voltage differential signaling (LVDS) . When the output of the input frame rate conversion unit 455 is a 3D video signal, the formatter 460 outputs the 3D format video signal in accordance with the output format of the display unit 380, May also support 3D services.

On the other hand, the voice processing unit (not shown) in the control unit 370 can perform the voice processing of the demultiplexed voice signal. Such a voice processing unit (not shown) may support processing various audio formats. For example, even when a voice signal is coded in a format such as MPEG-2, MPEG-4, AAC, HE-AAC, AC-3, or BSAC, a corresponding decoder can be provided.

In addition, the voice processing unit (not shown) in the control unit 370 can process the base, the treble, the volume control, and the like.

A data processing unit (not shown) in the control unit 370 can perform data processing of the demultiplexed data signal. For example, the data processing unit can decode the demultiplexed data signal even when it is coded. Here, the encoded data signal may be EPG information including broadcast information such as a start time and an end time of a broadcast program broadcasted on each channel.

Meanwhile, the control unit 370 shown in FIG. 4 may include other configurations or omit some of the illustrated configurations according to the needs of those skilled in the art, as an example of the present invention.

5 is a diagram illustrating remote control devices of a digital device according to the present invention.

According to the embodiment, various user interface devices (UID) capable of wired / wireless communication with the digital device 500 may be used as a remote control device in order to perform various operations for implementing the present invention .

The communication means of the remote control device may be, for example, Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, Digital Living Network Alliance ) May be used.

The user interface device may include a magic remote controller 520, a remote controller 530 having a keyboard and a touch pad, and the like in addition to a conventional remote controller 510.

The magic remote controller 540 can recognize a hand tremor or rotation by mounting a gyro sensor inside the remote controller. That is, the magic remote controller 540 moves the pointer according to the up, down, left, and right movements of the user so as to easily control a desired operation, for example, a channel or a menu.

The remote controller 530 having a keyboard and a touch pad facilitates input of text through a keyboard and facilitates movement of a pointer and enlargement and reduction of a picture or a moving picture through a touch pad.

Hereinafter, a service process for an EPG, a thumbnail image, a channel browser, and the like will be described in detail according to the present invention. For this purpose, a digital system or a service system (hereinafter referred to as a digital system) may be constituted by at least one device and a server corresponding to a client, for example. In the following description, service data refers to data for at least one service among an EPG, a thumbnail image, and a channel browser service.

In describing the service process between the device and the server in the digital system, for the sake of the understanding of the present invention, for convenience of explanation, the service data is transmitted from the digital device to the server, and the service data transmitted from the server is stored, A process of transmitting service data processed by the server to the digital device, and a process of processing the service data transmitted from the server between the digital devices.

Particularly, the process of processing between digital devices may include, for example, controlling a digital television receiver using service data in a mobile terminal, sharing through a social network service (SNS) such as twitter .

According to the present invention, a digital device can provide a service that is closer and more faithful to an actual broadcasting environment, including a richer variety of data than the conventional one in a service process such as an EPG, a thumbnail image, . An example of such a service is Advanced EPG (Advanced EPG).

First, the process of transferring service data from the digital device to the server, processing the stored data, processing the data, and transmitting the service data to the digital device in the server will be described as follows.

The digital device in this specification may include, for example, a digital television receiver such as a smart TV, a portable device such as a tablet PC or a smart phone, and the like. Hereinafter, the digital device will be described as a digital television receiver or a portable device as required in the relevant section. However, it is to be understood that the present invention is not limited to the above-described digital television receiver and handheld device, but may be applied to other electronic devices capable of other communication with the same / similar principle.

For example, the process of acquiring EPG / thumbnail image / channel browser service data from a digital device is as follows.

6 is a diagram for explaining an example of a method of acquiring EPG / thumbnail image / channel browser service data according to the present invention.

The digital device 620 may obtain at least one of, for example, an EPG / thumbnail image / channel browser service as follows.

The digital device 620 receives the EPG / thumbnail image / channel browser service data from the transmitting terminal (for example, a broadcasting station) 610 as service information included in a digital broadcasting signal or a digital broadcasting signal, And provides the service to the user based on the service data.

Alternatively, the digital device 620 may receive the EPG / thumbnail image / channel browser service data from a separate external server 630 for the purpose of providing a specific service, and configure and provide the service based on the EPG / thumbnail image / channel browser service data .

In particular, in the case of an EPG, it is general that a specific channel is tuned in response to a user's request in the digital device 620 and is obtained from service information in a digital broadcast signal received from the tuned channel. For example, in the case of DVB terrestrial waves, a PAT (Program Association Table), a PMT (Program Map Table), an SDT (Servcie Description Table), and a Service Information Table (SDT) are different according to the ATSC scheme and the DVB scheme. And an EIT (Event Information Table) are included in the service information. In this case, the digital television receiver 620 configures the EPG itself based on the received service information and provides the EPG service in response to the request of the user.

In the latter case, the external server 630 may provide additional data for the prime time or prime program that is not provided by the broadcasting station 610 .

As described above, the digital device 620 can receive the service data provided from the broadcasting station 610 and / or the external server 630 and provide it to the user.

7 is a view for explaining an example of a digital system according to the present invention.

Referring to FIG. 7, the digital system according to the present invention includes a digital device 710 and a data server 715. Here, the digital system may further include an external server 790 as needed.

Here, the digital device 710 may be either a portable device or a digital television receiver.

In addition, the data server 715 may be a server of a manufacturer of a portable device or a digital television receiver.

As described above, the digital device 710 may receive digital broadcast signals from the broadcast station 705 and / or the external server 790 and / or service information in the digital broadcast signal for EPG / thumbnail / At least one data may be provided.

However, the EPG / thumbnail / channel browser service data that the one digital device 710 can acquire is obtained from the digital broadcast signal received by directly tuning the corresponding channel through the tuner, or acquired from the external server 790 , Service coverage by region is generally as low as less than 50%. Accordingly, it is difficult to provide an EPG / thumbnail / channel browser service that is faithful to the actual service environment in the digital device 710. That is, in the above environment, a plurality of cases where a single digital device 710 can not provide a data service requested or retrieved by a user may occur.

Hereinafter, in order to compensate for the fact that only the broadcasting station 705 or the external server 790 is required to properly respond to the user's EPG / thumbnail / channel browser service request according to the present invention, a data server 715 is constructed I want to use it.

According to the present invention, by utilizing the data server 715 in the digital system, it is possible to collect EPG / thumbnail / channel browser service data of each digital device and process it by storing, processing, Quality service can be provided.

Unlike the conventional digital device, in the present invention, the data server 715 collects EPG / thumbnail / channel browser service data collected through a plurality of digital devices having the same service list and / The service data is combined with or combined with the EPG / thumbnail / channel browser service data of the mobile terminal, and then the processed service data is transmitted to each digital device again. Thus, upgraded service can be provided through the latest rich and high quality service data in a short time.

7, a process of collecting, processing, storing, and managing service data between the digital device 710 and the data server 715 will be described in detail.

An example of the data server 715 according to the present invention shown in FIG. 7 includes a control unit 720, an EPG processing unit, and a thumbnail processing unit 740.

Here, the EPG processing unit may include an EPG crawler module 730, a processing unit 750, and a database (DB) 770.

The digital device 710 communicates with the data server 715 in order to provide an EPG service according to the present invention and performs a kind of registration or authentication procedure.

For example, the digital device 710 first transmits its device information to the data server 715 (A), and receives a setting value from the data server 715 based on the transferred device information (C). Hereinafter, the set value will be described as, for example, a service list set identifier (Service List-Set-ID).

The device information may include, for example, a device model, a country, a language, a receiver-type and a channel or service list, and a user- ID) are included.

For example, even if the product is manufactured by the same manufacturer as the device model number or ID, the device model may differ depending on the model of the device, so it may be necessary to provide accurate information Can be delivered for delivery.

The country may be, for example, Korea (KR), Germany (DE), UK (UK), and the like.

For example, the language indicates a language used in a country in which the device belongs, and in this case, a language that can be supported through a caption function or the like may be included in the device.

The receiver type may be, for example, terrestrial, cable, satellite, Internet Protocol TV (IPTV), mobile or the like.

The service list may be, for example, list information on a channel or service accessible or available through an auto scan in a digital device. The service list may further include, for example, a service name or channel name information.

For example, the user ID may be assigned a unique value for the device or the manufacturer for determining whether the user is a registered user or not, and determining whether the user is a legitimate user through authentication of the user.

When the auto-scan is performed in the digital device 710, the digital device collects the device information as described above and transmits it to the data server 715. Here, the device information may further include 3-id in addition to the above-described information, or may be included in specific information such as the service list in the above-described device information, for example.

Here, 3-id may include, for example, an original network identifier, a transport stream identifier, and a service identifier.

For example, the 3-id may serve as a reference for identifying a device that can share the service data according to the present invention, for example, for each reception type in one country. Alternatively, the service may be identified with a service or channel name obtained from the EPG data or the like together with the 3-id described above.

For example, the digital device 710 configures the 3-id in the device information as a region (UK), a MUX (DVB-T), and a dvb: //233a.2f.1 Lt; / RTI > In the above, 233a denotes an original network identifier indicating a region, 2f denotes a transport stream identifier indicating a MUX, and 1 denotes a service identifier indicating the service.

On the other hand, based on the device information received from the digital device 710, the data server 715 determines to which group the digital device belongs. Here, the 3-id in the device information may be used in the determination process. The data server 715 transmits the group identification information, that is, the service list set identifier, to the corresponding digital device based on the group determination result.

This group will be described as a super set, for example. Such a service list set identifier may be configured to configure a superset to be managed together based on, for example, the country in the device information of each digital device and the reception type information in the data server 715, To provide information.

The service list set identifier performs a function of a kind of identification information between the digital device 710 and the data server 715.

That is, as long as one service list set identifier is allocated through information exchange between the digital device 710 and the data server 715, appropriate processing can be performed using only the assigned service list set identifier in the subsequent process .

For example, the process of updating the EPG / thumbnail / channel browser service data from the respective digital devices to the data server 715 or conversely transmitting the EPG / thumbnail / channel browser service data from the data server 715 to the digital device 715 Processing such as collection, processing, management, etc. of all data can be performed based on or based on the service list set identifier alone.

In the present invention, the service list set identifier is a value for distinguishing a bundle of each service list, i.e., a superset, when managing the EPG / thumbnail / channel browser data by the service list in the data server 715, Similarly, supersets can be configured with two of the device information: country and receiver type. For example, in Europe, the same service can be considered if the 3-id is the same within a country for each reception type.

Referring to FIG. 8, after step A, each digital device may update the EPG data periodically or non-periodically by transmitting the EPG data including the 3-id allocated thereto to the data server 715 (B).

Here, the transmission of the first EPG data may be transmitted, for example, in the above-described A process.

The transmitted EPG service data may be configured based on service information including EPG / thumbnail / channel browser data in a digital broadcasting signal transmitted from the broadcasting station 705 in the digital device 710.

As described above, the service information including the EPG data includes, for example, an SDT relating to a service in the case of DVB terrestrial waves, and an EIT relating to an event, that is, a program.

In other words, the digital television receiver 710 parses the SDT and the EIT from the digital broadcast signal to extract the data for the EPG configuration and stores it in the storage unit. The digital device 710 reads the stored data, -id, i. e., the service list set identifier to the data server 715.

The data server 715 receives the EPG / thumbnail / channel browser service data from each digital device, and can directly or after processing it and store it in the database. In the above, the EPG / thumbnail / channel browser service data received through the external server 790 during processing may be used. However, if the EPG / thumbnail / channel browser service data collide with each other in the processing, the service data received from the external server 790 and the service data received based on the SI information in the digital device can be selected have. For example, the data server 715 may prioritize the service data based on the SI information transmitted from the broadcasting station 705 providing the program by weighting it more than the external server 790 in the above-mentioned data collision problem or the like.

Hereinafter, the process of processing the EPG service data received from the data server 715 will be described in detail.

The control unit 720 transmits the device information received from each digital device to the EPG crawler module 730 in the process A or B described above.

The EPG crawler module 730 configures a superset based on the device information of each digital device and returns an identifier of superset, that is, a service list set identifier, to the control unit 720. Here, the control unit 720 may control the superset configuration and not the EPG crawler module 730 to generate or generate a service list set identifier for the super set.

The control unit 720 returns the service list set identifier returned from the crawler module 730 to each corresponding digital device.

In addition, after the service list set identifier is returned, the control unit 720 transmits the updated EPG service data to the crawler module 730 when the updated EPG service data is received from each digital device.

The crawler module 730 receives the updated EPG service data of each digital device through the control unit 720 and transmits the updated EPG service data to the processing unit 750.

In this process, the crawler module 730 may analyze updated parameters, for example, in the updated EPG data of each digital device.

Also, the crawler module 730 may process the analysis result in units of the service list set identifier and transmit the processed result list to the processing unit 750 together with the service list set identifier.

Here, each digital device may transmit the EPG service data to the data server 715 at the same time, but may transmit them at different times.

In this case, the crawler module 730 analyzes the EPG data received from the specific digital device. For example, the crawler module 730 may compare the service data received from another digital device at the previous time or the version version is low, it can be removed without transferring it to the processing unit 750.

The crawler module 730 may transmit the EPG service data to the processing unit 750 whenever EPG service data is received from each digital device. However, in this case, since a load may occur in the processing unit 750, a sufficient amount of updated parameters may be accumulated or periodically transmitted to the processing unit 750 to reduce the load on the entire server.

The processing unit 750 receives the updated EPG service data of each digital device transmitted from the crawler module 730, and stores the updated EPG service data in the database 770 as it is.

Here, the processing unit 750 may receive the EPG data periodically or non-periodically from the external server 790, and may be used in processing before storing the updated EPG service data of the digital device.

The processor 750 distinguishes each EPG service data received from the crawler module 730 and the external server 790 on the basis of, for example, a preconfigured superset, that is, a service list set identifier.

The processing unit 750 processes each of the EPG service data classified as described above and stores it in the database 770 in the superset unit described above.

The machining process can be done through, for example, translation, merge, or the like. The service list set identifier and the basic information necessary for channel switching for each broadcasting standard can be added for EPG data search (Search) through the above processing.

Hereinafter, when each digital device is requested to provide an EPG service from a user, it is possible to provide an EPG service best suited to an actual broadcasting environment because of its abundance, variety, and high coverage in each region. same.

When the EPG service provision request is input from the user, the digital device 710 transmits a search parameter including the received service list set identifier to the data server 715 to request the EPG service data.

Here, the search parameter may further include, for example, query information, start index information, maximum result maxResults information, category information, sort information, and the like in the existing device information have.

In particular, the EPG service may be set as category information for the EPG service provision request. However, when setting the category to all, for example, not only the real-time tab but also the information about the CP tab (for example, the YouTube tab) may be received. However, in the case of the CP tab, only URL (Uniform Resource Locator) information may be provided.

The control unit 720 confirms the request of the digital device 710 and determines whether the request is an updated EPG service data request or not.

If it is determined that the EPG service provision request is a determination result, the control unit 720 transmits a search request including a search parameter to a search module (not shown).

The search module analyzes the search parameters transmitted from the control unit 720.

The search module transmits the results of the analyzed search parameters to the search engine, and the search engine searches the database 770 based on the transmitted search parameters. Here, in terms of the nature of the EPG service data, the database is generally composed of not only the current day or current event information but also information on the past or / and future of a predetermined period starting from today or today, This is because it needs to be kept large or long. However, as will be described later, if the characteristic long-term or large-capacity storage is not indispensable, such as thumbnail image service data, a buffer or memory for temporary storage may be used.

The search engine receives the retrieved result from each database 770 and transmits it to the search module. The search module may analyze the search result received from the search engine, configure it in the form of a response corresponding to the request of the step, and return the result to the controller 720. Here, the type of the response of the search module to be returned may be, for example, xml.

The control unit 720 may transmit the EPG service data returned from the search module to the corresponding digital device together with the service identifier set list or independently.

The digital device receives and parses the EPG service data from the data server 715, and configures the EPG screen from the parsed result to service the user. The EPG service data parsed in this process may be stored in a storage unit in a digital device or in a cloud or a portable device connected to the digital device.

8 is a diagram for explaining an example of a process of updating EPG data in a data server according to the present invention.

8, the left side 810 may refer to a digital device, and the right side 815 may refer to a data server.

The EPG service data update process according to the present invention will be described with reference to FIG. 8 as an example of three digital devices related to the same service (UK, ENG, DVB-T).

The first digital device 820 is a service list that can be accessed by a corresponding digital device such as UK, ENG, and DVB-T, that is, for example, 1. dvb: //233a.2f.1, 2. dvb: //233a.2f.2, 3. dvb: //233a.2f.3, 4. dvb: //233a.3f.1, 5. dvb: //233a.4f.1 and 6. dvb: //233a.4f.2.

The second digital device 830 is a service list that is accessible from the corresponding digital device, for example, UK, ENG, DVB-T. For example, 1.sup.vv: //233a.2f.2, 2. dvb: //233a.2f.3, 3. dvb: //233a.3f.1, 4. dvb: //233a.4f.1, and 5. dvb: //233a.6f.1 .

The third digital device 840 is a list of services accessible from the corresponding digital device by UK, ENG, DVB-T, that is, five EPG service lists, for example, 1. dvb: //233a.2f.1, 2. dvb: //233a.2f.2, 3. dvb: //233a.2f.3, 4. dvb: //233a.3f.1, and 5. dvb: //233a.5f.1 .

In particular, in FIG. 8, the service to be updated in each digital device is service No. 2 in the first digital device 820, service No. 3 in the second digital device 830, and service No. 5 in the third digital device 840 Service.

These three digital devices 820, 830 and 840 all have the same service list set identifier. That is, the EPG data of the three digital devices 820, 830 and 840 belong to one superset.

The superset includes, for example, a total of eight EPG service data. That is, the EPG service data includes 1. dvb: //233a.2f.1, 2. dvb: //233a.2f.2, 3. dvb: //233a.2f.3, 4. dvb: // 233a .3f.1, 5. dvb: //233a.4f.1, 6. dvb: //233a.4f.2, 7. dvb: //233a.5f.1, and 8. dvb: // 233a. 7f.1 may be included.

This is an example of EPG service data updated and received from each digital device belonging to the superset. In other words, each digital device in the same superset can receive the same EPG service data list in the superset from the data server 715, for example.

For example, the first digital device 820 has a total of six services that the first digital device 820 can access. However, when the first digital device 820 requests the data server 715 to provide the EPG service data, the data server 715 transmits the eight EPG service data in the superset to which the corresponding digital device belongs.

In this case, the first digital device 820 parses the response of the data server 1150, constructs an EPG from the parsed EPG data, and provides it to the user.

However, here, the first digital device 820 may configure the EPG service without filtering the EPG service data for the inaccessible service, and provide the EPG service to the user through the screen.

For example, the first digital device 820 may receive the 7. dvb: //233a.5f.1 and 8. dvb: //233a.7f.1 services of the in-response EPG service data received from the data server 715 It may be convenient for the user to pre-filter and provide the EPG service in the process of providing the service. However, even if the service is thus filtered, for example, it may be a service associated with another accessible service, or in the case of contents, it may be used in configuring the EPG service in the corresponding digital device.

The second digital device 830 and the third digital device 840 can also provide the EPG service in the same manner as the process of the first digital device 820 described above.

In addition, superset is only for convenience of description in this specification. For example, the EPG service data processed through the control unit 720, the EPG crawler module 730, and the processing unit 750 described above is updated A search module, and a search engine.

In addition, the digital device may transmit the updated EPG service data to the server 715, or may separately or periodically or non-periodically transmit rating information related to the channel or program currently being viewed by the digital device, It can also transmit / receive together.

According to this, the server may receive the EPG service data of each digital device together with the audience rating information related to the EPG service data, and provide the differentiated services by providing the EPG service data together or separately during the EPG service providing process.

The above description has been exemplified and explained on the basis of the DVB system. However, the present invention is not limited to the above-described DVB system, and can be used in the same manner in the ATSC system, for example. However, in the ATSC method, a necessary channel name and / or program name may be added due to a difference in the broadcasting method). Here, the channel name may have the same function as the above-described 3-id, for example.

Accordingly, the server constructs a superset based on the channel name of each digital device, adds the service list set identification information of the super set, maps the superset to the digital device, and transmits the super set to the corresponding digital device do. The updating process of the EPG service data and the EPG search process according to the EPG service provision request of the digital device are all related to the above-mentioned contents, and a detailed description thereof will be omitted here. However, in the case of North America, when a collision of EPG data provided from various sources occurs on the basis of a channel name, only one EPG data is selected or all the collided EPG data is transmitted to a digital device So that the digital device can filter it based on the information of the area or the like.

Hereinafter, the channel browser will be described in a similar manner to the EPG data. The basic concept is similar to the processing method of EPG data, and a detailed description thereof will be described with reference to the above-mentioned contents, and hereinafter, the contents corresponding to the channel browser will be mainly described.

In the case of a channel browser, basically, data for constituting a channel browser may be extracted from service information in a digital broadcasting signal of a broadcasting station, or may be provided from a channel browser providing server such as an EPG providing server.

However, the channel coverage varies from one digital device to another, and the channel browser server can not provide a channel browser for all the channels accessible from the corresponding digital device because of limitation of the channel coverage. Accordingly, when a user requests a channel browser to a digital device, there is a case where a channel is provided with a thumbnail image for each channel, and a channel is provided with a black screen. This can eventually lead to complaints about digital devices and broadcasting services.

In such a reality, the broadcasting system as shown in FIG. 7 is used to process the channel browser in a manner similar to the above-described EPG service providing method.

That is, the digital device captures the current screen as a back channel and stores the thumbnail image even if there is no user request for the channel browser for the currently tuned channel.

The thumbnail image captured for the specific channel may be configured in a 3-id format, for example, and transmitted to the data server together with or separately from the EPG update described above.

In addition, the thumbnail image capturing of the screen of the channel may be performed in various manners. For example, when a channel is switched, the corresponding screen may be directly captured, and the current screen may be captured periodically. In this case, the digital device selects only one thumbnail image stored in the most recently stored one among the captured images of each channel and treats the selected thumbnail image as a representative thumbnail image for the corresponding channel, and transmits the data to the data server as channel browser update data .

The control unit in the data server transmits the updated channel browser data to the crawler module, the crawler module analyzes the channel browser data, and transmits the analyzed result to the processing unit.

The processing unit combines the updated channel browser data for each channel based on each service list set identifier with, for example, channel browser data provided separately from the channel browser server and combines them. The processed channel browser data is stored in the database separately from the EPG data, for example.

Here, since the channel browser data is, for example, a thumbnail image, a thumbnail image is separately stored and a URL address for accessing the thumbnail image is stored.

When the user requests a channel browser in the future, the stored channel browser data transmits the search parameters for channel browser search to the data server as in the case of the above-mentioned EPG data processing, and the control parameter in the data server transmits the search parameters to the search module , The search module analyzes the search parameters and drives the search engine according to the analysis results.

For example, the search engine searches the database based on the search parameters transmitted from the search module, collects data related to the channel browser, and transmits the collected data to the search module.

The search module constructs a response including the URL address for accessing the thumbnail image of each channel in response to the user's request, and transmits the response to the corresponding digital device through the control unit.

The digital device reads the URL address for each channel and the corresponding channel by parsing the response, accesses the read URL address, extracts a thumbnail image for the channel, and provides the user with a channel browser.

According to the present invention, there is an effect that it is possible to provide an advanced EPG and a channel browser in which the channel coverage is increased in each digital device and the metadata of the program unit is rich.

In addition, the thumbnail processing unit 740 includes an authentication module 742 and a program thumbnail crawler module 744.

The authentication module 742 determines whether the digital device 710 is a device that is eligible to upload and generates an authentication signal according to the determination result and transmits the authentication signal to the control unit 720 and / or the program thumbnail crawler module 744. [ Lt; / RTI > At this time, if it is determined that the digital device 710 is a device that is not eligible to upload based on the authentication signal transmitted from the authentication module 742, the control unit 720 generates a control signal for controlling the access of the device And transmitted to the corresponding digital device. On the other hand, if it is determined that the digital device 710 is a device eligible to upload based on the authentication signal transmitted from the authentication module 742, the control unit 720 allows access to the digital device 720, And may transmit a control signal including a message indicating authentication success.

The program thumbnail crawler module 744 may be activated in response to the authentication signal transmitted from the authentication module 742 and may be provided to the thumbnail image transmitted from each connected digital device in the same manner as the EPG crawler module 730 described above .

Here, the thumbnail processing unit 740 may construct a database 770 like the above-described EPG processing unit, store the thumbnail image processed by the program thumbnail crawler module 744, or may construct a database 770 unlike the above- The thumbnail image processed in the program thumbnail crawler module 744 may be temporarily stored in a buffer, a memory, or the like. The buffer or memory may be located, for example, in the thumbnail processing section or may be located outside.

In the above, the processing unit 750 may process the EPG service data processed in the EPG crawler module 730 and / or the EPG service data collected from the external server 790, for example, The program thumbnail image service data may also be processed in the same manner as the EPG service data described above and transmitted to the thumbnail processing unit or stored in the database 770. The processing unit 790 processes the input data based on various criteria And may be stored in the database 770 or transmitted to the corresponding processing unit.

Referring to FIG. 7, in the digital system according to the present invention, the EPG service data, the channel browser data, and the thumbnail image may be processed in different modules, for example.

However, the digital device 710 may transmit the service data to the data server 715 according to the service data, or may collect the service data in advance and transmit the service data to the data server 715 as shown in FIG. 9, The control unit 720 may classify and classify them and transmit them to the corresponding module.

9 shows the latter case. In the digital device 910, for example, the EPG service data 924 and the thumbnail image service data 922 are transmitted together to the data server 930.

In the present invention, service data possessed by each digital device is transmitted to a data server, and service data transmitted from each digital device and service data separately collected through an external server are processed in a data server, And transmitting the processed data to provide richer and higher quality service data.

At this time, the number of digital devices connected to the data server constituting the digital system and transmitting the service data to the data server need not be infinite, for example. This is because, if infinite digital devices transmit their own service data to the data server, not only the service quality may be deteriorated due to the traffic problem, but also there is a cost problem due to the high performance and large capacity of the data server . In addition, the service data transmitted from each digital device communicating with the data server is not completely different, and there may be a lot of data that overlap each other in a predetermined range. In this situation, the digital system may view the viewpoint of transferring the service data from the digital device to the data server and the viewpoint of transferring the processed service data from the data server to each digital device. In other words, assume that there are 100 digital devices and at least one data server connected to each other by a digital system. In this case, only 50 digital devices transmit service data to the data server, and a total of 100 digital devices can control to receive and process the processed service data from the data server. This can be appropriately determined in order to provide a differentiated service according to traffic and cost.

In addition, the data server in the digital system can transmit a control signal to each digital device so that the authority to transmit the service data to the data server, the transmission period, and the like can be set. This can be appropriately determined in consideration of the traffic and the capacity problem of the server, as described above.

For example, suppose that the digital device A transmits EPG / thumbnail image / channel browser service data to the data server every 10 seconds.

In this case, the data server can process as follows.

Basically, the digital device A judges whether or not the digital device A has a transmission right. If the transmission right is determined, the service list set identifier information of the corresponding digital device A is determined, and it is determined whether the same service data as the service data transmitted from the digital device A is already received from the digital device having the corresponding service list set identifier.

As a result of the determination, if the data server determines that the service data received from the digital device A is overlapped with the service data received from the corresponding service list set identifier group, the service data transmission period is fixed to the digital device A If it is transmitted at an entirely different time, for example, at intervals of 10 seconds from a predetermined time, it is possible to control the transmission period so as to be transmitted at intervals of 10 seconds from the predetermined time + alpha time. Alternatively, the data server may transmit the control signal to transmit the service transmission period at a different transmission interval from the previous transmission interval, such as 11 seconds, if the service transmission interval is 10 seconds apart. In the above,? May be, for example, 1 to 3 seconds.

The data server may transmit a reject message together with the control signal so that the corresponding control signal can be identified and processed in the digital device. Accordingly, when the reject message is received, the digital device can extract the control signal transmitted from the data server, decode the extracted control signal, reset the transmission time or transmission period, and transmit the service data to the data server in the same manner.

FIG. 10 is a diagram for explaining another example of the digital system configuration according to the present invention.

10, the digital system includes a digital device 1010 and a data server 1015. The data server 1015 communicates with the external server 1090 individually to transmit service data related to the present invention .

Hereinafter, the contents overlapping with the contents of the above-described FIGS. 7 to 9 will be described with reference to the above description, and a detailed description thereof will be omitted.

In particular, the digital system of Fig. 10 is slightly different from the digital system and data server of Fig. 7 described above.

Specifically, the data server 1015 shown in Fig. 10 basically has the EPG service data processing unit and the thumbnail image service data processing unit, but the configurations of the respective processing units are different.

10, the EPG service data processing unit may further include an analysis module 1035 and an EPG providing module 1040 in addition to the EPG crawler module 1030 described above.

The analysis module 1035 transmits the device information or location information of the device together with the device information or the updated service data transmission in the digital device 1010. The analysis module 1035 transmits the device information or the location information of the device to the control unit 1020 in the data server 1015, Lt; / RTI > The location information includes at least one of GPS information, an identifier of an area to which the corresponding digital device 1010 belongs (for example, Original_network_id) and a ZIP code of a zip code of an area to which the digital device 1010 belongs . The analysis module 1035 analyzes the location information of the received digital device 1010. Thus, the analyzed data may be, for example, in the form of a ZIP code for an identifier of an area to which the digital device 1010 belongs, GPS information, or a zip code. That is, the analysis module 1035 extracts at least one of the GPS, the Original_network_id, and the ZIP code and transmits the extracted location information of the digital device 1010 to the EPG providing module 1040.

The EPG providing module 1040 accesses the database 1080 in which the EPG service data is stored based on the location information of the digital device 1010 received from the analysis module 1035 and extracts the EPG service data related to the location information And then transmitted to the digital device 1010 through the control unit 1020. The EPG providing module 1040 can determine the appropriate service data by comparing the location information of the received digital device 1010 with the device information used in the grouping, . This can be used for the same principle in the case of a program thumbnail image to be described later. For example, if the location information is Original_network_id, it can be compared with the Original_network_id of each formed group to find a matching group. On the other hand, if it is a Zip code, it is possible to extract the Original_network_id of the region corresponding to the Zip code and find the group corresponding to the Zip code. The GPS information can also be identified in the same manner through the Original_network_id of the region corresponding to the corresponding GPS information.

In the case where the digital device is a mobile device, for example, the location information is not fixed and the location information can be continuously changed. In the case where the EPG service is requested, the location information is stored in the EPG service Data may be different, and this fact is considered.

In the same manner, in the case of the thumbnail image, the thumbnail processing unit receives the location information of the device from the digital device 1010, and the location information of the received device is analyzed by the second analysis module 1055, Code to the program thumbnail providing module (1060).

The program thumbnail providing module 1060 accesses the database 1090 or its own buffer or memory based on the original network ID and / or the home code to obtain a service list set corresponding to the original network ID and / And transmits the service data to the corresponding digital device 1010 again.

If the digital device 1010 is a mobile device, for example, if local information of the mobile device is transmitted to the server to receive service data such as EPG data stored in advance as shown in FIG. 7, Service data such as EPG data may be transmitted to the corresponding mobile device. Here, the data server may select an optimal super group based on the received local information, extract the service data of the selected super group, and transmit the extracted service data to the mobile device. However, due to the nature of the mobile device, there may be a change in location information even for the same mobile device. Therefore, compared with the previous location information, the local information is changed and the super group can be judged again.

11 is a diagram illustrating an example of EPG and / or thumbnail image service data provided according to the present invention.

11, the data server 1110 may be, for example, the same as the data server of FIG. 7 or 10. FIG.

11 is a view for transmitting service data from a data server to each digital device rather than from a digital device to a data server.

In particular, FIG. 11 illustrates a case 1120 in which thumbnail image service data is included together with the EPG service data format.

Alternatively, as described above, the EPG service data and the thumbnail image service data may be individually composed of one service data and transmitted.

FIG. 12 shows an example of a system schematic diagram for explaining a process of processing service data in the digital system according to the present invention.

Referring to FIG. 12, the digital system transmits EPG / thumbnail image / channel browser service data to three digital devices 1210, 1220 and 1230 to a data server 1240.

The data server 1240 collects, processes and stores the service data, and transmits the stored service data to the requested digital device. Here, the digital device may be, for example, at least one of the three digital television receivers 1210, 1220, and 1230 and the portable devices 1242 and 1244 in FIG.

In the above description, if the digital device transmits its own service data at a current time period periodically or non-periodically to the data server and the contents of receiving the processed service data from the data server are disclosed, Indicating that the device and the receiving device of the service data may be different from each other. In other words, in FIG. 12, the service data transmitted from the three digital television receivers 1210, 1220, and 1230 to the data server 1240 may be transmitted to the portable devices 1242 and 1244.

FIG. 13 is a diagram illustrating a process of transmitting and receiving service data between digital devices according to the present invention.

FIG. 13 is a diagram showing an example in which when one digital device receives the latest service data processed from the data server, for example, as described above with reference to FIGS. 6 to 12, It can be seen as a concept of extending services to unauthorized digital devices because they can not be connected.

13, it is assumed that the portable device 1310 receives the latest processed EPG / thumbnail image / channel browser service data from the data server.

Here, the portable device 1310 may transmit the service data previously received by the connectable digital device 1320 in a wired / wireless network environment to which the portable device 1310 belongs.

Between the portable device 1310 and the digital television receiver 1320, data can be transmitted and received between various wired / wireless communication networks and wired / wireless communication methods such as N-screen and cloud.

In this case, the portable device 1310 or the digital television receiver 1320 can be connected to the broadcasting station 610 and / or the external server 630 shown in FIG. 6, respectively, to receive the service data.

FIG. 14 is a diagram illustrating a process for transmitting and receiving service data between digital devices according to the present invention.

FIG. 14 describes contents for controlling authority to prevent transmission of service data between digital devices connected to a wired / wireless network, for example.

For example, if there is a digital television 1420 in the home, and a passerby who is totally unrelated within the home network range accesses the network using his or her portable device 1410 and controls the digital television receiver 1420 any way, It can be a problem.

Accordingly, in order to prevent such a problem, only the authorized digital device is connected to another digital device through the mutual authentication procedure between the digital devices so that the digital device can receive and control the service data after coupling.

14, in the portable device 1410 having the service data, when the security authentication information 1412 called xpto25 is transmitted to the digital television receiver 1420 belonging to the network, the digital television receiver 1420 decodes the authentication information, A message relating to the access permission may be transmitted to the portable device 1410 or displayed on the screen of the digital television receiver 1420. [

For example, the security authentication information 1412 may be generated in the data server that transmitted the processed service data, and may be separately generated in the portable device 1410.

Also, with respect to security authentication information generation, various authentication related algorithms may be used.

13 illustrates a screen for controlling the digital television receiver 1320 connected based on the service data (for example, EPG service data) received by the portable device 1310. For example,

Referring to the above description, a digital system as a service extension concept will be constructed as shown in FIG.

15, a first digital device (portable device) 1540 transmits its current service data to a data server 1510 and acquires the latest processing service stored in the database 1530 from the data server 1510 And receives data.

The first digital device 1540 can communicate with the second digital device 1550 to transmit and receive the latest processed service data received from the data server 1510.

15 through 16, the first digital device 1540 receives service data from the second digital device 1550, for example, and transmits the service data to the data server 1510, It is possible.

17 is a view for explaining an example of a screen of a digital device receiving service data according to the present invention.

In FIG. 17, for example, assuming a portable device, the portable device receives service data received directly from the data server or indirectly from another digital device, decodes the received service, You can also output detailed information on demand.

Referring to FIG. 17, for example, a screen 1710 of a digital device is provided with a button for selecting a previous program item 1720 and a next program item 1760, and a program And may provide various information 1730 to the user.

Such a digital device may control other connected digital devices, for example, a viewing item 1740 on the digital television receiver and a sharing on the Twitter (1750) item on the screen 1710 of the portable device.

This means that, for example, when the EPG / thumbnail / channel browser service is used in a handheld device, it can be transmitted to another digital device having a larger size screen and can be watched when the screen size is inconvenient. Alternatively, the service coverage may be further extended by sharing it with the text data on the tweeter.

18 is a diagram for explaining a service control process between digital devices according to the present invention.

17 to 18, it is explained that one digital device 1810 can control another at least one digital device 1820 and 1830 using service data received from a data server or other digital device .

For example, if a user has received service data from a data server via a portable device, he / she can control the services of other digital devices 1810 and 1820 to which he / she has control. In this case, the user's portable device can perform the same function as a remote control.

In addition, the portable device can control only one digital device, and can control another digital device in the digital device or can directly control the digital device in the portable device.

For example, the portable device 1810 transmits a device_id to the digital device A 1820 in an HTTP manner, and requests a key for data encryption.

The digital device A 1820 transmits a response code and an encryption key in response to the request of the portable device 1810.

The portable device 1810 uses an encryption key that is transmitted from the digital device A 1820 to at least one of the 3-id of the service or program displayed on the current screen, that is, Original Network id, TS id, Service id, And transmits it to the digital device A 1820 again.

The digital device 1820 decodes the received channel information and determines whether it is a currently valid channel. Here, if the channel is determined to be a valid channel, the corresponding broadcast is reproduced and provided. However, if it is determined that the channel is not a valid channel, it may be transmitted to the portable device 1810 again including a response code indicating that the digital device can not be played back. Accordingly, when a response including a non-reproducible response code is received from the corresponding digital device, the portable device accesses another digital device other than the digital device, changes the service or program, and communicates again with the above- And can make a playback request.

The digital device A 1820 can communicate with another digital device 1830 connected to the digital device A 1820 even when the digital device A 1820 can not reproduce the digital content.

The functions of the portable device and the digital television receiver described in the above description can be exchanged with each other. The functions of the portable device and the digital television receiver can be exchanged between the portable device and the portable television or the digital television receiver, And service control through it is possible.

FIG. 19 is an example of a flowchart illustrating a service data processing method in a digital system according to the present invention.

The service data processing method shown in FIG. 19 will now be described with reference to FIGS. 6 to 18. FIG.

Each digital device transmits the device information to the data server (S1902).

Each digital device receives the service list set ID to which the digital device belongs based on the transmitted device information from the data server (S1904).

Each digital device transmits the EPG / thumbnail image / channel browser service data to the data server (S1906).

The controller in the data server classifies the service data transmitted from each digital device and transmits the service data to the corresponding crawler module (S1908), analyzes the service data transmitted from the analysis module and / or the location information of each digital device, (S1910).

The processor combines or combines the received service data with the service data received from the external server to process the service data and stores the service data in the service list set ID or the superset unit. Here, if the service data is thumbnail image data, it may not pass through the processing unit. In this case, the service data may be temporarily stored in a buffer or a volatile memory provided in a separate module (S1912).

The digital device transmits a search parameter for requesting service data according to a user's request to the data server (S1914).

When the data server receives a service data request from the digital device, the data server judges whether the digital device has a right. If it is determined that the user has a proper authority, the control unit transmits the search parameter to the search engine (S1916).

The data server analyzes the search parameters and accesses the database or the buffer or memory based on the service list set ID to retrieve the service data (S1918). Analyzes the searched service data, and generates a response message corresponding to the service request (S1920).

The data server transmits the created service data to the corresponding digital device (S1922), and the digital device parses the transmitted service data. Then, a service screen is constructed based on the parsed result and is provided to the user (S1924).

As described above, when the digital device uses a social service such as another digital device or a tweeter connected to the network, the digital device can transmit and receive the received service data through a procedure such as authentication again.

As described above, according to the present invention, a digital device can implement an EPG / thumbnail image / channel browser service which is quantitatively and / or qualitatively improved as compared with the related art, can communicate with other digital devices or can expand a service using a social network service So that it can meet the convenience and demand of the user.

The search module constructs a response including a URL address for accessing the thumbnail image of each channel in response to the request of the user, and transmits the response to the corresponding digital receiver through the controller.

The digital receiver parses the response to read the URL address of each channel and the corresponding channel, accesses the read URL address, extracts a thumbnail image of the channel, and provides the user with a channel browser.

According to the present invention, it is possible to provide an advanced EPG and a channel browser, in which channel coverage is increased in each digital receiver and metadata of program units is abundant.

The digital receiver and its operation method according to the present invention are not limited to the configuration and method of the embodiments described above but the embodiments can be applied to all or a part of each embodiment Or may be selectively combined.

Meanwhile, the operation method of the digital receiver of the present invention can be implemented as a code readable by a processor in a processor-readable recording medium provided in a digital receiver. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium that can be read by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet . In addition, the processor-readable recording medium may be distributed over network-connected computer systems so that code readable by the processor in a distributed fashion can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

201: network interface unit 202: TCP / IP manager
203: service delivery manager 204: SI decoder
205: Demultiplexer 206: Audio decoder
207: Video decoder 208:
209: Service Control Manager 210: Service Discovery Manager
211: SI & Metadata Database 212: Metadata Manager
213: service manager 214: UI manager

Claims (28)

delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete A digital system for processing service data,
And transmits the device location information to a network connected data server, receives the service data based on the device location information analyzed from the data server, and outputs the service data to the screen, and based on the output service data, And a second digital device,
Wherein the first digital device transmits the channel selection command,
http method and requests a key for data encryption to the second digital device. Upon receiving the response code and the requested encryption key from the second digital device, the service list of the program displayed on the current screen is received And encrypts the encrypted digital data using the encryption key and transmits the encrypted digital data to the second digital device. 19. The method of claim 18,
The device location information may include:
A ZIP code, and GPS information of the first digital device to which the first digital device belongs. 20. The method of claim 19,
Program data and URL information for downloading a thumbnail image are stored, and a group corresponding to the first digital device is selected by comparing and analyzing the transmitted device position information and pre-stored device information, And a data server for extracting and transmitting the service data. 21. The method of claim 20,
The device information includes:
A country, a language, a receiver type, a device model, a service list, and a usage ID,
Wherein the service list includes a 3-id of an original network identifier, a transport stream identifier, and a service identifier. 22. The method of claim 21,
The service list includes:
A service or channel name. delete 19. The method of claim 18,
Wherein the second digital device comprises:
And reproduces the service if the transmitted service list is a valid channel. 19. The method of claim 18,
Wherein the second digital device comprises:
If the transmitted service list is an invalid channel,
Return a non-reproducible response code to the first digital device or transmit the service list to the third digital device to request the reproduction. 19. The method of claim 18,
Wherein the first digital device transmits the channel selection command,
And transmits a security authentication code for coupling with the second digital device and couples according to the response of the second digital device. 27. The method of claim 26,
Wherein the first digital device comprises:
Extracts URL information in service data received from the data server, and downloads a thumbnail image according to the extracted URL information to service the digital image. delete

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