KR100703723B1 - Digital device control method and home network system using same - Google Patents

Abstract

Provided are a digital device control method and a home network system using the same.

According to an embodiment of the present invention, a digital device includes a remote signal receiver for receiving a remote control signal from a first remote controller, and extracts identification information and the command code of the first remote controller from the remote control signal, With reference to the priority table including the priority information for the identification information, according to the result of determining whether or not the second remote controller and the first remote controller is a lock function is set, the command code for the command code And a control unit for executing the operation.

Home network, digital device, control, priority

Description

Method for digital device control in Home network and Home network system using by method for digital device control}

1 is a block diagram of a home network applied to the present invention.

2 illustrates a structure of a digital device according to an embodiment of the present invention.

3 illustrates a priority table stored in a memory unit of a digital device according to an embodiment of the present invention.

4 illustrates a structure of an integrated remote controller according to an embodiment of the present invention.

5 is a flowchart illustrating a digital device control process according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: digital TV

260: remote signal receiver

270 control unit

300: priority table

262, 264, 266: remote control

The present invention relates to a home network, and more particularly, to a digital device control method in a home network and a home network system to which the method is applied.

As the demand for PCs in the home increases and the provision of various multimedia contents through internet access and data sharing becomes active, the home network related market regarding the combination between home multimedia terminals and the PC is emerging. A home network means that two or more devices in a home communicate with each other.A home network used in a home is a PC network that connects various peripheral devices around a PC and shares the Internet usage. There is an AV network for transmitting multimedia data between products, a white household appliance such as a washing machine, a refrigerator and an air conditioner, and a living network for automatically controlling energy such as power and water.

As a technology used in home networks, wireless network technologies including Bluetooth, HomeRF, etc., and wired network technologies including interfaces such as telephone lines, power lines, and IEEE 1394 are being studied. Currently, such as Internet refrigerators, digital TVs, washing machines, and the like, Digital devices supporting the interface as described above are being released.

As products aimed at the home network market are released, the number of digital devices existing on the home network in the home increases, thus causing a problem of priority in controlling the digital devices. For example, in a home network, one remote controller can be used to control several digital devices on the network. However, there can be several such integrated remote controllers in one household. In this case, when the user is recording the TV program using the first integrated remote controller, if another user changes the TV channel using the second integrated remote controller, a problem occurs that program recording is not normally performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a digital device control method capable of efficiently controlling digital devices on a home network and a home network system according to the method.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a remote control device according to an embodiment of the present invention includes a key input unit for generating a key signal by at least one of a function key and a lock key for setting a lock function, and user identification. A wireless signal receiver for receiving the user identification information from an RFID tag in which information is recorded, a controller for generating a remote control signal including at least one of a command code corresponding to the key signal, the user identification information, and pre-stored identification information; And a data transmitter for transmitting the remote control signal to a digital device.
In addition, in order to achieve the above object, a digital device according to an embodiment of the present invention, a remote signal receiving unit for receiving a remote control signal from a first remote control device, and the identification information of the first remote controller from the remote control signal and the Extracting a command code and referring to a priority table including priority information of the identification information, and determining whether or not the second remote controller and the first remote controller having the lock function are set to match. Accordingly, the control unit includes an operation for executing an operation on the command code.

In addition, in order to achieve the above object, a method of controlling a digital device according to an embodiment of the present invention includes: receiving a key signal by at least one of a function key and a lock key for setting a lock function; Receiving the user identification information from an RFID tag on which identification information is recorded, generating a remote control signal including at least one of a command code corresponding to the key signal, the user identification information, and pre-stored identification information; and Transmitting the remote control signal to a digital device.
In addition, in order to achieve the above object, a digital device control method according to an embodiment of the present invention, by receiving a remote control signal transmitted from a remote controller, the command code included in the remote control signal and identification information for the remote controller Extracting, checking a priority of the identification information with reference to a priority table, checking whether there is a detailed item for which a lock function is set in the priority table, and after the checking, the lock function Determining whether the set detailed item matches the detailed item for the identification information, and selectively executing an operation on the command code.

Specific details of other embodiments are included in the detailed description and drawings, and the advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete and common knowledge in the technical field to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Prior to describing the preferred embodiment of the present invention, the home network technology will be briefly described.

First, home network technology is classified into wired network technology and wireless network technology. Wired network technologies include Home Phoneline Network Alliance (hereafter referred to as Home PNA), Power Line Control (hereinafter referred to as PLC), Ethernet, IEEE 1394, and Universal Serial Bus (USB). The wireless network technologies include IrDA (infrared communication), IEEE 802.11x-based wireless LAN (IEEE 802.11), HomeRF (IEEE 802.15), Bluetooth (IEEE 802.15), UWB (UltraWideBand), Zigbee, and HiperLAN.

Home PNA is a wired network technology that allows you to configure your home network at 10Mbps using a telephone line installed in your home. It has the advantage of not having to establish a separate communication line. These Home PNAs are compatible with IEEE 802.3 Ethernet networks, modems, ISDN, etc., and use bandwidth higher than the bandwidth used by telephones or other services, thus avoiding any interference on the telephone line while the network is in use. Home PNA allows any computer on the network to share the Internet, even if only one computer is connected to the Internet. It is also available in combination with 10Mbps Ethernet technology or 56Kbps modem technology, allowing multiple people to play Internet games and chat at the same time on one Internet line at home.

PLC is a wired network technology that converts a communication signal into a high frequency signal of 100KHz ~ 30MHz using a power line installed in a home or office and transmits the signal using a high frequency filter.

Ethernet is a networking technology based on the IEEE 802.3 standard and has long been proven in data communications. It is the foundation of home networks, including corporate networks, and is attracting attention because of its high speed (currently 10Mbps and 100Mbps), high safety, and lower cost than other competitive technologies.

IEEE 1394, also known as FireWire, is a serial bus interface technology that was originally developed as a hard disk interface. IEEE 1304 has recently emerged due to the digitization of AV devices and the provision of a multimedia environment, and up to 63 terminals can be connected. Depending on the mode, it supports high data rates such as 100Mb㎰, 200Mb㎰, and 400Mb㎰, enabling high-speed real-time data transmission, bidirectional communication, and Plug and Play (PnP).

Universal Serial Bus (USB) is a technology that has the characteristics of being a Human Interface Device (HID), easy connection with peripheral devices, sufficient interrupt request (IRQ) resources, and Plug and Play (PnP) functions.

In contrast, the IEEE802.11x wireless LAN technology has emerged as a wireless home networking technology because it does not require cable wiring and is a communication type that can be connected to the base LAN even when mobile, and the LAN configuration is quick and the network structure can be easily changed. . Wireless LAN technologies include various wireless technology standards, such as 802.11b, 802.11a, 802.11g, 802.11e, and 802.11i.

HomeRF (Home Radio Frequency) is a technology that is being standardized by companies leading the PC, peripheral, communication, software, and semiconductor industries, and the standard for the Shared Wireless Access Protocol (SWAP) 1.1 standard has been completed. It uses RF method, not infrared, to target network construction in home.

Bluetooth is a low-power, low-cost, short-range wireless communication technology that enables communication between various devices within a distance of about 10m. Initially, it was restricted by the scope of application. It is attracting attention as a technology for establishing a personal area network (PAN) between devices, PC peripherals such as headsets / keyboards / speakers / printers, and devices connected to a PC by wire.

Ultra-wideband (UWB), a technology primarily used for military radar or remote detection, was licensed as a commercial technology by the FCC in February 2002. In the early stages of application in the field of communication, evaluation samples of UWB chipsets for wireless video transmission such as VTRs and DVD players have been released. Since 2003, development of 100Mbps chips for wireless video transmission in homes is expected.

So far, we have briefly reviewed home network technologies. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a home network applied to an embodiment of the present invention. As shown in FIG. 1, a home network applied to an embodiment of the present invention includes a home gateway 120, a home server 130, and digital devices 140, 150, and 160 that are controlled devices. And a plurality of remote control devices capable of remotely controlling digital devices.

The home gateway 120 is a device that acts as a bridge between the Internet 110 or a wide area service network and the home server 130. The home gateway 120 performs a built-in routing function for managing an IP address, and Multiple services such as voice, data and video provided are supported throughout the house.

The home server 130 controls information on all digital devices connected to each other in the home through an interface such as Home PNA, Bluetooth, PLC, and manages and stores external information coming and going through the Internet 110. The digital devices in the home can be connected to the external internet network 110.

Digital devices 140, 150, and 160 are devices with digital circuits that process digital data. Computers, printers, scanners, pagers, digital cameras, fax machines, digital copiers, personal digital assistants (PDAs), mobile phones, digital phones, Examples include digital projects, digital video recorders, digital camcorders, digital TV broadcast receivers, digital satellite broadcast receivers, set-top boxes, digital refrigerators, microwave ovens, rice cookers, and air conditioners. Hereinafter, in the description of the present invention, a case where the controlled device is the digital TV 200 and the controller device is a remote controller will be described as an embodiment.

Next, FIG. 2 shows a block diagram of the structure of the digital TV 200 according to the embodiment of the present invention. Referring to this structure and operation of the digital TV 200 according to an embodiment of the present invention will be described.

The tuner 210 tunes to a reception band selected by a user, converts the received signal wave into an IF (intermediate frequency) signal, and provides the demodulation unit 220. The demodulator 220 supplies the MPEG-2 transport stream (TS) format data obtained by demodulating the digital signal provided from the tuner 210 to the demultiplexer 230.

The demultiplexer 230 extracts audio data and video data of a designated service from the MPEG-2 transport stream TS provided by the demodulator 220, and respectively, an audio decoder 240 and a video decoder. decoder 250).

The audio decoder 240 decodes the input voice data, generates program voice data, and supplies the generated voice data to the voice processor 242. The voice processing unit 242 performs a predetermined voice signal processing on the program voice data provided from the audio decoder 240 and outputs a voice through the amplifier.

The video decoder 250 decodes image data, generates program image data, and supplies the same to the image processor 252. The image processor 252 outputs an image by applying predetermined image signal processing to the input program image data.

The remote signal receiver 260 receives the radio signals transmitted from the remote controllers 262, 264, and 266 and provides them to the controller 270. According to a preferred embodiment of the present invention, the wireless signal transmitted from the remote controller 262 includes identification information of the corresponding remote controller 262, which will be described later with reference to FIG. 4.

The network communication unit 290 allows the digital TV 200 to be connected to the home server 130 and other digital devices 140, 150, and 160 through a network. The network communication unit 290 may transmit data transmitted from the home server 130. The process is transferred to the control unit 270. The network communication unit 290 may be implemented to support at least one interface, for example, an interface such as PLC, Home PNA, IEEE 1394, Bluetooth, or the like. For example, when the network communication unit 290 supports the IEEE 1394 interface, the home server 130 and the digital TV 200 are connected through an IEEE 1394 communication line, and the control signal transmitted from the home server 130. Is transmitted to the control unit 270 through the network communication unit 290.

Meanwhile, the controller 270 controls the operation of the digital TV 200 according to the remote signal received through the key input unit (not shown) or the remote signal receiver 260. For example, when receiving a signal transmitted from the first remote controller 262 through the remote signal receiver 260, first, a command code and identification information of the first remote controller 262 are extracted from the received signal. Thereafter, the identification information, that is, the priority of the first remote controller is checked with reference to the information of the priority table stored in the memory unit 280, and then the components of the digital TV are controlled according to the result. A more detailed description thereof will be described later with reference to the priority table illustrated in FIG. 3.

The memory unit 280 stores programs necessary for the operation and control of the digital TV 200. In addition, the memory unit 280 stores a priority table, which is a priority item, a priority for each item, a detailed item for each item, that is, a plurality of homogeneous remote controllers and a priority for each detail item. It includes a ranking and lock function setting state information for each detailed item. The memory unit 280 may be implemented as nonvolatile memory devices such as cache, ROM, PROM, EPROM, EEPROM, and flash, but is not limited thereto.

Next, FIG. 3 illustrates a priority table stored in the memory unit 280 according to an embodiment of the present invention. As shown in FIG. 3, the priority table 300 according to an embodiment of the present invention includes a priority item 310, a priority item 320 for each item, a detail item 330 for each item, and each detail item. The priority 340 for the item and the lock function setting state 350 information for each detailed item are included.

The priority item 310 means an item for which priority can be set. According to an embodiment of the present invention, the priority of the type of the remote controller capable of controlling the operation of the controlled device, that is, the digital TV 200 may be set. For example, a user can control the digital TV 200 using an integrated remote controller or a mobile phone with a built-in remote control function. In this case, the user can control different types of remote control from the integrated remote controller and the mobile phone. It can be classified as a device and prioritized. That is, the command transmitted from the integrated remote controller may be set as the first priority, and the command transmitted from the cellular phone may be set as the second priority. In this case, when the signal transmitted from the integrated remote controller and the signal transmitted from the mobile phone are simultaneously received by the digital TV 200, the control unit 270 reads the information of the priority table 300 stored in the memory unit 280. See. As a result, since the item priority (first priority) of the integrated remote controller is higher than the item priority (second priority) of the mobile phone, the operation of the digital TV 200 is controlled according to the signal transmitted from the integrated remote controller.

Meanwhile, several identical integrated remote controllers may exist in a home. In this case, priority of each integrated remote controller may be set. For example, as shown in FIG. 2, when there are three integrated remote controllers 262, 264, and 266, the first integrated remote controller 262, the second integrated remote controller 264, and the third integrated remote controller 266 are present. ), Priority may be set to 1st, 2nd and 3rd ranks, respectively.

In addition, when there are also three mobile phones with a built-in remote control function, the priority of the first mobile phone, the second mobile phone, and the third mobile phone is as shown in FIG. Can be set to 3 ranks. In this case, when the digital TV 200 receives the control signal transmitted from the second mobile phone while being controlled by the control signal transmitted from the first mobile phone, the control unit 270 processes the received signal to process the received signal. 2, identification information of the cellular phone is obtained, and the priority according to the identification information, that is, the priority of the second cellular phone, is checked with reference to the information of the priority table 300 stored in the memory unit 280. FIG. As a result of the check, since the priority (first priority) for each subitem of the second mobile phone is higher than the priority for each subcategory (second priority) of the first mobile phone, the operation of the digital TV according to the signal transmitted from the second mobile phone is performed. To control.

In addition, according to an embodiment of the present invention, by adding a [user] item to the priority item, a priority may be set according to a user as well as a remote controller such as a remote controller. For example, priority can be set according to a user by applying an RFID technology. Here, the RFID technology will be briefly described as follows.

RFID (Radio Frequency IDentification) is a field of wireless automatic recognition technology such as barcode and biometric, and is largely divided into RFID tag (RFID tag) and RFID reader (RFID reader) that store unique information. It is composed. The reader generates an RF signal of a predetermined band through an antenna to form an electromagnetic field, that is, an RF field. When a tag enters the RF field range, the unique information stored in the tag is modulated into a radio signal and transmitted to the reader. The reader then processes the received signal to obtain unique information about the tag.

In order to enable the implementation of the present invention, each user preferably includes a tag in which identification information of the corresponding user is embedded, and a reader for receiving an RF signal transmitted from the tag, that is, a wireless signal receiver includes a remote controller such as a remote controller. It is preferable to be provided in.

In this case, the priority for the [user] item and the priority for the individual user can be set. That is, as shown in FIG. 3, the priority of each item of the [user] item is set to the third priority, and when the user is composed of father, mother, and daughter, the priority of each tax item for each user is 2 It can be set to rank 3, rank 1, or rank 1.

Meanwhile, the lock setting state 350 information indicates whether to set a lock function for detailed items of which priority is determined. According to the embodiment of the present invention, even if the remote control device having a low priority for each subitem, when a high priority operation is performed through the corresponding remote control device, the remote control device having a high priority can be prevented.

For example, a remote controller such as a remote controller is provided with a lock key, and when a lock key is applied when the digital TV 200 is controlled, the lock setting state 350 of the corresponding remote controller is provided. Set to prevent the remote control from being affected by the high priority even if the priority of the remote control is low. More specifically, if a daughter is recording a broadcast program on the digital TV 200 using the second remote control 264 and the father changes the channel of the digital TV 200 using the first remote control 262, Since the operation of the digital TV 200 is controlled according to the information of the priority table 300 shown in FIG. 3, the channel is changed during recording, which causes a problem in broadcast recording. (The priority per item for [Remote control] is higher than the item priority for [User], and the priority for each sub item of the first remote control 262 is higher than the priority for each sub item of the second remote control 264. Since it is high, the digital TV 200 operates by the control signal transmitted from the second remote control 264.)

In this case, the daughter applies the lock key provided in the second remote control 264 to set the lock function, so that the operation of the digital TV 200 can be controlled by the first remote control 262. Do not let it. In more detail, when a lock key is applied from the second remote controller 264, a command signal for the lock key is received by the digital TV 200, and as a result of processing the received signal, The contents of the priority table 200 are updated. That is, the lock setting state for the second remote controller 264 is set in the priority table 300. After that, when the command signal transmitted from the first remote controller 262 is received by the digital TV 200, the controller 270 processes the received signal to extract identification information of the second remote controller, and the memory unit 280. Check the contents of the priority table 300 stored in the () to check whether there is a detailed item set the lock (lock) function. As a result of the inspection, since there is a detailed item in which the lock function is set, a warning message is output to inform the user of the first remote controller that the lock function is being executed for the currently executing job.

The contents of the priority table 300 may be changed, added, or deleted by the user, and each digital device 140 or 160 may store a priority table having the same contents or a priority table having different contents. It may be.

Next, Figure 4 shows the structure of a remote control 262 according to an embodiment of the present invention. Referring to the structure and operation of the remote control 262 according to an embodiment of the present invention will be described.

As shown in FIG. 4, the remote controller 262 according to the embodiment of the present invention may operate the key input unit 410, the wireless signal receiver 440, the controller 430, the memory unit 420, and the data transmitter 450. Include.

The key input unit 410 is a portion that can receive a user's command is provided with a plurality of keys for controlling the operation of the controlled device, that is, the digital TV (200). When the keys provided in the key input unit 410 are applied by the user, the keys are generated and provided to the controller 430 by generating a key signal for the corresponding key. In addition, the key input unit 410 is preferably provided with a lock (lock) key to set the lock (lock) function for the operation currently being executed in the digital TV.

The wireless signal receiver 440 receives the wireless signal transmitted from the RFID tag and provides it to the controller 430. For example, when the father controls the digital TV 200 using the second remote control 264, when the RF signal including the user identification information is transmitted from the father RFID tag, the second remote control 264 The wireless signal receiver 440 receives the transmitted RF signal and provides it to the controller 430.

The controller 430 receives a key signal from the key input unit 410 and generates a command code for the key signal. In addition, when receiving the RF signal transmitted from the RFID tag through the wireless signal receiving unit 440, the controller 430 processes the received signal to obtain the user identification information included in the signal. On the other hand, after generating the command code for the authorized key, the data transmitter 450 is controlled so that the wireless signal including the command code, remote control identification information and user identification information can be transmitted to the digital TV.

FIG. 5 is a flowchart illustrating a process of controlling a digital device according to an embodiment of the present invention in a home network system including a controlled device and a plurality of remote controllers as described above.

First, the content of the priority table in the digital device, that is, the digital TV 200 is preferably set in advance. When the result of setting the priority table is shown in FIG. 3, a process of controlling the digital TV 200 by a plurality of remote controllers will be described below.

The controller 270 of the digital TV 200 determines whether a remote control signal is received through the remote signal receiver 260 (S410). As a result of the determination, when the remote control signal is not received, that is, when the function key provided in the key input unit (not shown) is operated, the operation of the digital TV 200 is controlled according to the operated function key (S412).

As a result of determining whether the remote signal is received, if the remote control signal is received, the controller 270 processes the received signal to obtain a command code and identification information included in the signal (S420). For example, if the [Volume Up] key is operated in the second remote control 264, the remote controller includes a command code for the [Volume Up] key and identification information of the second remote control 264 in the second remote control 264. The control signal is sent. When the remote control signal is received by the remote signal receiving unit 260 of the digital TV 200, the control unit 270 identifies the command code for [volume up] and the second remote control 264 from the received remote control signal. Extract the information.

After extracting the identification information of the second remote control 264, the priority of the sub-items corresponding to the identification information, that is, the second remote control 264 by referring to the priority table 300 stored in the memory unit 280 Check the priority (S430).

After confirming the priority of the second remote controller 264, the lock setting state for each subitem in the priority table is checked to check whether there is a detail item to which the lock function is set (S440). ). As a result of the inspection, if there is no item for which the lock function is set, the volume of the digital TV 200 is increased according to the command of the second remote controller 264 (S442). As a result of the inspection, if there is a detailed item in which the lock function is set, it is determined whether the detailed item in which the lock function is set matches the detailed item for identification information (S450). That is, when the priority table 300 stored in the memory unit 280 is the same as that of FIG. 3, the lock setting state for each subitem is checked in the priority table 300, thereby providing a lock function. It is determined whether the set detailed item is a detailed item for the second remote controller 264.

As a result of determining whether or not the detail item to which the lock function is set and the detail item for the identification information are matched, if the determination result is matched, the received command is executed (S442). That is, the volume of the digital TV 200 is increased according to the control signal transmitted from the second remote controller 264. If the determination result does not match, a warning message is output to indicate that the digital TV 200 is controlled by the remote controller 264 in which the lock function is set (S460).

For example, when the [channel increase] key is operated in the first remote control 262, the remote controller includes a command code for the [channel increase] key and identification information of the first remote control 262 in the first remote control 262. The control signal is sent. When the remote control signal is received by the remote signal receiving unit 260 of the digital TV 200, the control unit 270 repeats the above-described process, and the command code for the [channel increase] from the received remote control signal and the first The identification information of the remote controller 262 is extracted (S420), and the priority of the detailed items corresponding to the identification information, that is, the first remote controller (S420) is referred to with reference to the priority table 300 stored in the memory unit 280. It is confirmed that the priority of 262 is set to be the highest priority among the three remote controllers (S430).

Thereafter, the lock setting state for each subitem in the priority table 300 is checked, and it is checked whether there is a subitem for which the lock function is set (S440). According to the priority table of FIG. 3, in this case, since there are detailed items in which the lock function is set, the control unit 270 continues to display the details of the identification information in detail items in which the lock function is set. It is determined whether the items match (S450). In this case, the detailed item for the identification information is the first remote controller 262, and the detailed item for which the lock function is set is the second remote controller 264, so the determination result does not coincide with each other. Therefore, the controller 270 outputs a warning message to inform that the digital TV 200 is controlled by the remote controller to which the lock function is set.

Meanwhile, when outputting a warning message, a message related to command execution may be output to selectively execute a command of the first remote controller 262. For example, when a warning message is output, a command execution and a command cancellation menu are output, and when command execution is selected, the command of the first remote controller 262 is used regardless of whether the lock function is set. Accordingly, if the channel of the digital TV is changed (S480), and [CANCEL COMMAND] is selected, the execution of the command for [CHANGE CH] of the first remote controller 262 is canceled to lock the second remote controller 264 ( lock) function settings are maintained.

With reference to the drawings exemplified as above, the digital device control method and the home network system using the same have been described, but the present invention is not limited by the embodiments and drawings disclosed herein, Of course, various modifications may be made by those skilled in the art within the scope of the technical idea.

As described above, according to the method for controlling a digital device according to the present invention and a home network system using the same, there are one or more of the following effects.

First, there is an advantage that the digital devices on the home network can be efficiently controlled according to the information of the priority table.

Claims (5)

A key input unit for generating a key signal by at least one of a function key and a lock key for setting a lock function; A wireless signal receiver configured to receive the user identification information from an RFID tag in which user identification information is recorded; A controller configured to generate a remote control signal including at least one of a command code corresponding to the key signal, the user identification information, and pre-stored identification information; And And a data transmitter for transmitting the remote control signal to a digital device. A remote signal receiver for receiving a remote control signal from the first remote controller; And A second remote controller configured to extract the identification information and the command code of the first remote controller from the remote control signal and refer to a priority table including priority information on the identification information, wherein the lock function is set; And a controller configured to execute an operation on the command code according to a result of determining whether the first remote controller is matched. The method of claim 2, wherein the priority table, And at least one of priority information on at least one higher item including at least one detail item, priority information on the detail item, and information on a lock setting state of the detail item. Receiving a key signal by at least one of a function key and a lock key for setting a lock function; Receiving the user identification information from an RFID tag in which user identification information is recorded; Generating a remote control signal including at least one of a command code corresponding to the key signal, the user identification information, and previously stored identification information; And And transmitting the remote control signal to a digital device. Receiving a remote control signal transmitted from a remote controller and extracting a command code included in the remote control signal and identification information of the remote controller; Identifying a priority of the identification information by referring to a priority table; Checking whether there is a detail item in which a lock function is set in the priority table; And And after the checking, determining whether the detailed item for which the lock function is set coincides with the detailed item for the identification information, and selectively executing an operation on the command code.

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