Patent Publication Number: US-2022223151-A1

Title: Display device for providing speech recognition service and method of operation thereof

Description:
TECHNICAL FIELD 
     The present disclosure relates to a display device capable of providing a speech recognition service and a method of operation thereof. 
     BACKGROUND ART 
     Digital TV services using wired or wireless communication networks are becoming common. Digital TV services are capable of providing various services that could not be provided by the existing analog broadcasting services. 
     For example, Internet Protocol Television (IPTV) and smart TV services, which are types of digital TV services, provide interactivity so that users can actively select the types of watching programs, the watching time, and the like. The IPTV and smart TV services can provide various additional services, such as Internet search, home shopping, and online games, based on such interactivity. 
     In addition, recent TVs provide a speech recognition service that recognizes a speech uttered by a user and performs a function corresponding to the speech. 
     However, the existing speech recognition service does not take into account the usage environment of the display device, and merely determines the intention of a voice command uttered by a user and provides a function corresponding thereto. 
     That is, there is a limitation that the speech recognition service depends only on the user&#39;s utterance. 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     The present disclosure aims to provide a display device capable of performing an operation according to a user&#39;s utterance intention in consideration of use information of the display device in real time. 
     Technical Solution 
     A display device for providing a speech recognition service according to an embodiment of the present disclosure can include a display unit, a network interface unit configured to communicate with a server, and a control unit configured to receive a voice command uttered by a user, acquire usage information of the display device, transmit the voice command and the usage information of the display device to the server through the network interface unit, receive, from the server, an utterance intention based on the voice command and the usage information of the display device, and perform an operation corresponding to the received utterance intention. 
     A method of operating a display device for providing a speech recognition service according to an embodiment of the present disclosure can include receiving a voice command uttered by a user, acquiring usage information of the display device, transmitting the voice command and the usage information of the display device to a server, receiving, from the server, an utterance intention based on the voice command and the usage information of the display device, and performing an operation corresponding to the received speech intention. 
     Advantageous Effects 
     According to various embodiments of the present disclosure, a speech recognition service may be provided by recognizing a user&#39;s voice command in accordance with a dynamically changing usage environment of a display device. Therefore, a user&#39;s voice command convenience may be greatly improved. 
     In addition, according to an embodiment of the present disclosure, a function of switching an external input frequently used by a user can be performed only by a simple utterance, thereby improving convenience of a voice command. 
     In addition, according to an embodiment of the present disclosure, since there is no need to build a separate dictionary in a server for recognizing all information that is generated and deleted in real time, the load on the server can be reduced. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram illustrating a configuration of a display device according to an embodiment of the present disclosure. 
         FIG. 2  is a block diagram illustrating a remote control device according to an embodiment of the present disclosure. 
         FIG. 3  is a view illustrating an actual configuration of a remote control device according to an embodiment of the present disclosure. 
         FIG. 4  is a view illustrating an example of utilizing a remote control device according to an embodiment of the present disclosure. 
         FIG. 5  is a view for describing a configuration of a speech recognition system according to an embodiment of the present disclosure. 
         FIG. 6  is a ladder diagram for a method of operating a system according to an embodiment of the present disclosure. 
         FIGS. 7 to 9  are views for describing a process in which an NLP server analyzes a user&#39;s utterance intention by using a voice command and information on a display device, according to an embodiment of the present disclosure. 
         FIGS. 10 to 12  are views for describing scenarios in which an operation corresponding to a user&#39;s voice command is performed based on usage information of a display device according to various embodiments of the present disclosure. 
         FIGS. 13 to 15  are views for describing that even a channel in which a channel code does not exist can be switched to a corresponding channel according to a voice command according to an embodiment of the present disclosure. 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, embodiments relating to the present disclosure will be described in detail with reference to the accompanying drawings. The suffixes “module” and “unit” for components used in the description below are assigned or mixed in consideration of easiness in writing the specification and do not have distinctive meanings or roles by themselves. 
     A display device according to an embodiment of the present disclosure, for example, as an artificial display device that adds a computer supporting function to a broadcast receiving function, can have an easy-to-use interface such as a writing input device, a touch screen, or a spatial remote control device as an Internet function is added while fulfilling the broadcast receiving function. Then, with the support of a wired or wireless Internet function, it is possible to perform an e-mail, web browsing, banking, or game function in access to Internet and computers. In order to perform such various functions, standardized general purpose OS can be used. 
     Accordingly, since various applications are freely added or deleted on a general purpose OS kernel, a display device described herein, for example, can perform various user-friendly functions. The display device, in more detail, can be a network TV, Hybrid Broadcast Broadband TV (HBBTV), smart TV, light-emitting diode (LED) TV, organic light-emitting diode (OLED) TV, and so on and in some cases, can be applied to a smartphone. 
       FIG. 1  is a block diagram illustrating a configuration of a display device according to an embodiment of the present disclosure. 
     Referring to  FIG. 1 , a display device  100  can include a broadcast reception unit  130 , an external device interface unit  135 , a storage unit  140 , a user input interface unit  150 , a control unit  170 , a wireless communication unit  173 , a display unit  180 , an audio output unit  185 , and a power supply unit  190 . 
     The broadcast reception unit  130  can include a tuner  131 , a demodulation unit  132 , and a network interface unit  133 . 
     The tuner  131  can select a specific broadcast channel according to a channel selection command. The tuner  131  can receive broadcast signals for the selected specific broadcast channel. 
     The demodulation unit  132  can divide the received broadcast signals into video signals, audio signals, and broadcast program related data signals and restore the divided video signals, audio signals, and data signals to an output available form. 
     The external device interface unit  135  can receive an application or an application list in an adjacent external device and deliver it to the control unit  170  or the storage unit  140 . 
     The external device interface unit  135  can provide a connection path between the display device  100  and an external device. The external device interface unit  135  can receive at least one an image or audio output from an external device that is wirelessly or wiredly connected to the display device  100  and deliver it to the control unit  170 . The external device interface unit  135  can include a plurality of external input terminals. The plurality of external input terminals can include an RGB terminal, at least one High Definition Multimedia Interface (HDMI) terminal, and a component terminal. 
     An image signal of an external device input through the external device interface unit  135  can be output through the display unit  180 . A sound signal of an external device input through the external device interface unit  135  can be output through the audio output unit  185 . 
     An external device connectable to the external device interface unit  135  can be one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB Memory, and a home theater system, but this is just exemplary. 
     The network interface unit  133  can provide an interface for connecting the display device  100  to a wired/wireless network including the Internet network. The network interface unit  133  can transmit or receive data to or from another user or another electronic device through an accessed network or another network linked to the accessed network. 
     Additionally, some content data stored in the display device  100  can be transmitted to a user or an electronic device, which is selected from other users or other electronic devices pre-registered in the display device  100 . 
     The network interface unit  133  can access a predetermined webpage through an accessed network or another network linked to the accessed network. That is, the network interface unit  133  can transmit or receive data to or from a corresponding server by accessing a predetermined webpage through the network. 
     Then, the network interface unit  133  can receive contents or data provided from a content provider or a network operator. That is, the network interface unit  133  can receive contents such as movies, advertisements, games, VODs, and broadcast signals, which are provided from a content provider or a network provider, through network and information relating thereto. 
     Additionally, the network interface unit  133  can receive firmware update information and update files provided from a network operator and transmit data to an Internet or content provider or a network operator. 
     The network interface unit  133  can select and receive a desired application among applications open to the air, through network. 
     The storage unit  140  can store signal-processed image, voice, or data signals stored by a program in order for each signal processing and control in the control unit  170 . 
     Additionally, the storage unit  140  can perform a function for temporarily storing image, voice, or data signals output from the external device interface unit  135  or the network interface unit  133  and can store information on a predetermined image through a channel memory function. 
     The storage unit  140  can store an application or an application list input from the external device interface unit  135  or the network interface unit  133 . 
     The display device  100  can play content files (for example, video files, still image files, music files, document files, application files, and so on) stored in the storage unit  140  and provide them to a user. 
     The user input interface unit  150  can deliver signals input by a user to the control unit  170  or deliver signals from the control unit  170  to a user. For example, the user input interface unit  150  can receive or process control signals such as power on/off, channel selection, and screen setting from the remote control device  200  or transmit control signals from the control unit  170  to the remote control device  200  according to various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, Radio Frequency (RF), and IR. 
     Additionally, the user input interface unit  150  can deliver, to the control unit  170 , control signals input from local keys (not shown) such as a power key, a channel key, a volume key, and a setting key. 
     Image signals that are image-processed in the control unit  170  can be input to the display unit  180  and displayed as an image corresponding to corresponding image signals. Additionally, image signals that are image-processed in the control unit  170  can be input to an external output device through the external device interface unit  135 . 
     Voice signals processed in the control unit  170  can be output to the audio output unit  185 . Additionally, voice signals processed in the control unit  170  can be input to an external output device through the external device interface unit  135 . 
     Besides that, the control unit  170  can control overall operations in the display device  100 . 
     Additionally, the control unit  170  can control the display device  100  by a user command or internal program input through the user input interface unit  150  and download a desired application or application list into the display device  100  in access to network. 
     The control unit  170  can output channel information selected by a user together with processed image or voice signals through the display unit  180  or the audio output unit  185 . 
     Additionally, according to an external device image playback command received through the user input interface unit  150 , the control unit  170  can output image signals or voice signals of an external device such as a camera or a camcorder, which are input through the external device interface unit  135 , through the display unit  180  or the audio output unit  185 . 
     Moreover, the control unit  170  can control the display unit  180  to display images and control broadcast images input through the tuner  131 , external input images input through the external device interface unit  135 , images input through the network interface unit, or images stored in the storage unit  140  to be displayed on the display unit  180 . In this case, an image displayed on the display unit  180  can be a still image or video and also can be a 2D image or a 3D image. 
     Additionally, the control unit  170  can play content stored in the display device  100 , received broadcast content, and external input content input from the outside, and the content can be in various formats such as broadcast images, external input images, audio files, still images, accessed web screens, and document files. 
     Moreover, the wireless communication unit  173  can perform a wired or wireless communication with an external electronic device. The wireless communication unit  173  can perform short-range communication with an external device. For this, the wireless communication unit  173  can support short-range communication by using at least one of Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (USB) technologies. The wireless communication unit  173  can support wireless communication between the display device  100  and a wireless communication system, between the display device  100  and another display device  100 , or between networks including the display device  100  and another display device  100  (or an external server) through wireless area networks. The wireless area networks can be wireless personal area networks. 
     Herein, the other display device  100  can be a mobile terminal such as a wearable device (for example, a smart watch, a smart glass, and a head mounted display (HMD)) or a smartphone, which is capable of exchanging data (or inter-working) with the display device  100 . The wireless communication unit  173  can detect (or recognize) a communicable wearable device around the display device  100 . Furthermore, if the detected wearable device is a device authenticated to communicate with the display device  100 , the control unit  170  can transmit at least part of data processed in the display device  100  to the wearable device through the wireless communication unit  173 . Accordingly, a user of the wearable device can use the data processed in the display device  100  through the wearable device. 
     The display unit  180  can convert image signals, data signals, or on-screen display (OSD) signals, which are processed in the control unit  170 , or images signals or data signals, which are received in the external device interface unit  135 , into R, G, and B signals to generate driving signals. 
     Furthermore, the display device  100  shown in  FIG. 1  is just one embodiment of the present disclosure and thus, some of the components shown can be integrated, added, or omitted according to the specification of the actually implemented display device  100 . 
     That is, if necessary, two or more components can be integrated into one component or one component can be divided into two or more components and configured. Additionally, a function performed by each block is to describe an embodiment of the present disclosure and its specific operation or device does not limit the scope of the present disclosure. 
     According to another embodiment of the present disclosure, unlike  FIG. 1 , the display device  100  can receive images through the network interface unit  133  or the external device interface unit  135  and play them without including the tuner  131  and the demodulation unit  132 . 
     For example, the display device  100  can be divided into an image processing device such as a set-top box for receiving broadcast signals or contents according to various network services and a content playback device for playing contents input from the image processing device. 
     In this case, an operating method of a display device according to an embodiment of the present disclosure described below can be performed by one of the display device described with reference to  FIG. 1 , an image processing device such as the separated set-top box, and a content playback device including the display unit  180  and the audio output unit  185 . 
     Then, referring to  FIGS. 2 and 3 , a remote control device is described according to an embodiment of the present disclosure. 
       FIG. 2  is a block diagram illustrating a remote control device according to an embodiment of the present disclosure and  FIG. 3  is a view illustrating an actual configuration of a remote control device according to an embodiment of the present disclosure. 
     First, referring to  FIG. 2 , a remote control device  200  can include a fingerprint recognition unit  210 , a wireless communication unit  220 , a user input unit  230 , a sensor unit  240 , an output unit  250 , a power supply unit  260 , a storage unit  270 , a control unit  280 , and a sound acquisition unit  290 . 
     Referring to  FIG. 2 , the wireless communication unit  220  transmits/receives signals to/from an arbitrary any one of display devices according to the above-mentioned embodiments of the present disclosure. 
     The remote control device  200  can include a radio frequency (RF) module  221  for transmitting/receiving signals to/from the display device  100  according to the RF communication standards and an IR module  223  for transmitting/receiving signals to/from the display device  100  according to the IR communication standards. Additionally, the remote control device  200  can include a Bluetooth module  225  for transmitting/receiving signals to/from the display device  100  according to the Bluetooth communication standards. Additionally, the remote control device  200  can include a Near Field Communication (NFC) module  227  for transmitting/receiving signals to/from the display device  100  according to the NFC communication standards and a WLAN module  229  for transmitting/receiving signals to/from the display device  100  according to the Wireless LAN (WLAN) communication standards. 
     Additionally, the remote control device  200  can transmit signals containing information on a movement of the remote control device  200  to the display device  100  through the wireless communication unit  220 . 
     Moreover, the remote control device  200  can receive signals transmitted from the display device  100  through the RF module  221  and if necessary, can transmit a command on power on/off, channel change, and volume change to the display device  100  through the IR module  223 . 
     The user input unit  230  can be configured with a keypad button, a touch pad, or a touch screen. A user can manipulate the user input unit  230  to input a command relating to the display device  100  to the remote control device  200 . If the user input unit  230  includes a hard key button, a user can input a command relating to the display device  100  to the remote control device  200  through the push operation of the hard key button. This will be described with reference to  FIG. 3 . 
     Referring to  FIG. 3 , the remote control device  200  can include a plurality of buttons. The plurality of buttons can include a fingerprint recognition button  212 , a power button  231 , a home button  232 , a live button  233 , an external input button  234 , a voice adjustment button  235 , a voice recognition button  236 , a channel change button  237 , a check button  238 , and a back button  239 . 
     The fingerprint recognition button  212  can be a button for recognizing a user&#39;s fingerprint. According to an embodiment of the present disclosure, the fingerprint recognition button  212  can perform a push operation and receive a push operation and a fingerprint recognition operation. The power button  231  can be button for turning on/off the power of the display device  100 . The home button  232  can be a button for moving to the home screen of the display device  100 . The live button  233  can be a button for displaying live broadcast programs. The external input button  234  can be a button for receiving an external input connected to the display device  100 . The voice adjustment button  235  can be a button for adjusting the size of a volume output from the display device  100 . The voice recognition button  236  can be a button for receiving user&#39;s voice and recognizing the received voice. The channel change button  237  can be a button for receiving broadcast signals of a specific broadcast channel. The check button  238  can be a button for selecting a specific function and the back button  239  can be a button for returning to a previous screen. 
     Again, referring to  FIG. 2 , 
     if the user input unit  230  includes a touch screen, a user can touch a soft key of the touch screen to input a command relating to the display device  100  to the remote control device  200 . Additionally, the user input unit  230  can include various kinds of input means manipulated by a user, for example, a scroll key and a jog key, and this embodiment does not limit the scope of the present disclosure. 
     The sensor unit  240  can include a gyro sensor  241  or an acceleration sensor  243  and the gyro sensor  241  can sense information on a movement of the remote control device  200 . 
     For example, the gyro sensor  241  can sense information on an operation of the remote control device  200  on the basis of x, y, and z axes and the acceleration sensor  243  can sense information on a movement speed of the remote control device  200 . Moreover, the remote control device  200  can further include a distance measurement sensor and sense a distance with respect to the display unit  180  of the display device  100 . 
     The output unit  250  can output image or voice signals in response to manipulation of the user input unit  230  or image or voice signals corresponding to signals transmitted from the display device  100 . A user can recognize whether the user input unit  230  is manipulated or the display device  100  is controlled through the output unit  250 . 
     For example, the output unit  250  can include an LED module  251  for flashing, a vibration module  253  for generating vibration, a sound output module  255  for outputting sound, or a display module  257  for outputting an image, if the user input unit  235  is manipulated or signals are transmitted/received to/from the display device  100  through the wireless communication unit  225 . 
     Additionally, the power supply unit  260  supplies power to the remote control device  200  and if the remote control device  200  does not move for a predetermined time, stops the power supply, so that power waste can be reduced. The power supply unit  260  can resume the power supply if a predetermined key provided at the remote control device  200  is manipulated. 
     The storage unit  270  can store various kinds of programs and application data necessary for control or operation of the remote control device  200 . If the remote control device  200  transmits/receives signals wirelessly through the display device  100  and the RF module  221 , the remote control device  200  and the display device  100  transmits/receives signals through a predetermined frequency band. 
     The control unit  280  of the remote control device  200  can store, in the storage unit  270 , information on a frequency band for transmitting/receiving signals to/from the display device  100  paired with the remote control device  200  and refer to it. 
     The control unit  280  controls general matters relating to control of the remote control device  200 . The control unit  280  can transmit a signal corresponding to a predetermined key manipulation of the user input unit  230  or a signal corresponding to movement of the remote control device  200  sensed by the sensor unit  240  to the display device  100  through the wireless communication unit  220 . 
     Additionally, the sound acquisition unit  290  of the remote control device  200  can obtain voice. 
     The sound acquisition unit  290  can include at least one microphone and obtain voice through the microphone  291 . 
     Next,  FIG. 4  is described. 
       FIG. 4  is a view illustrating an example of utilizing a remote control device according to an embodiment of the present disclosure. 
       FIG. 4( a )  illustrates that a pointer  205  corresponding to the remote control device  200  is displayed on the display unit  180 . 
     A user can move or rotate the remote control device  200  vertically or horizontally. The pointer  205  displayed on the display unit  180  of the display device  100  corresponds to a movement of the remote control device  200 . Since the corresponding pointer  205  is moved and displayed according to a movement on a 3D space as show in the drawing, the remote control device  200  can be referred to as a spatial remote control device. 
       FIG. 4( b )  illustrates that if a user moves the remote control device  200 , the pointer  205  displayed on the display unit  180  of the display device  100  is moved to the left according to the movement of the remote control device  200 . 
     Information on a movement of the remote control device  200  detected through a sensor of the remote control device  200  is transmitted to the display device  100 . The display device  100  can calculate the coordinates of the pointer  205  from the information on the movement of the remote control device  200 . The display device  100  can display the pointer  205  to match the calculated coordinates. 
       FIG. 4( c )  illustrates that while a specific button in the remote control device  200  is pressed, a user moves the remote control device  200  away from the display unit  180 . Thus, a selection area in the display unit  180  corresponding to the pointer  205  can be zoomed in and displayed larger. 
     On the other hand, if a user moves the remote control device  200  close to the display unit  180 , a selection area in the display unit  180  corresponding to the pointer  205  can be zoomed out and displayed in a reduced size. 
     On the other hand, if the remote control device  200  is moved away from the display unit  180 , a selection area can be zoomed out and if the remote control device  200  is moved closer to the display unit  180 , a selection area can be zoomed in. 
     Additionally, if a specific button in the remote control device  200  is pressed, recognition of a vertical or horizontal movement can be excluded. That is, if the remote control device  200  is moved away from or closer to the display unit  180 , the up, down, left, or right movement cannot be recognized and only the back and forth movement can be recognized. While a specific button in the remote control device  200  is not pressed, only the pointer  205  is moved according to the up, down, left or right movement of the remote control device  200 . 
     Moreover, the moving speed or moving direction of the pointer  205  can correspond to the moving speed or moving direction of the remote control device  200 . 
     Furthermore, a pointer in this specification means an object displayed on the display unit  180  in response to an operation of the remote control device  200 . Accordingly, besides an arrow form displayed as the pointer  205  in the drawing, various forms of objects are possible. For example, the above concept includes a point, a cursor, a prompt, and a thick outline. Then, the pointer  205  can be displayed in correspondence to one point of a horizontal axis and a vertical axis on the display unit  180  and also can be displayed in correspondence to a plurality of points such as a line and a surface. 
       FIG. 5  is a view for describing a configuration of a speech recognition system according to an embodiment of the present disclosure. 
     Referring to  FIG. 5 , a speech recognition system  50  can include a display device  100 , a natural language processing (NLP) server  510 , and a database  530 . 
     The display device  100  can transmit, to the NLP server  510 , a voice command uttered by a user and usage information of the display device  100 . 
     Although the usage information of the display device  100  will be described later, the usage information of the display device  100  may be information collected from the time when a command for requesting a speech recognition service is received. 
     The display device  100  may further include the components shown in  FIG. 1 , and an NLP client  101  and a context manager  103  shown in  FIG. 5 . 
     The NLP client  101  can be a communication interface for performing wireless communication with the NLP server  510 . 
     The NLP client  101  can be included in the network interface unit  133  of  FIG. 1 . 
     The NLP client  101  can transmit the voice command and the usage information of the display device  100  to the NLP server  510  and can receive, from the NLP server  510 , an utterance intention based on the transmitted information. 
     The context manager  103  can collect the usage information of the display device  100  and can transmit the collected usage information of the display device  100  to the NLP client  101 . 
     The context manager  103  can be included in the control unit  170  of  FIG. 1 . 
     The NLP server  510  can analyze the user&#39;s utterance intention based on the voice command and the usage information of the display device  100 , which are received from the display device  100 . 
     The NLP server  510  can transmit utterance intention information including the analysis result to the NLP client  101  of the display device  100 . 
     The database  530  can store a plurality of pattern commands used to analyze the utterance intention of the voice command. 
     The database  530  can be included in the NLP server  510 . 
     Then, referring to  FIG. 6 , a method of operating a system according to an embodiment of the present disclosure is described. 
       FIG. 6  is a ladder diagram for a method of operating a system according to an embodiment of the present disclosure. 
     Referring to  FIG. 6 , the control unit  170  of the display device  100  receives a command for requesting a speech recognition service (S 601 ). 
     In an embodiment, the control unit  170  can receive the command for the speech recognition service from the remote control device  200  through the wireless communication unit  173  or the user input interface unit  150 . 
     The speech recognition service can be a service for recognizing a voice command uttered by a user, determining the intention of the recognized voice command, and performing an operation corresponding to the intention. 
     The user can select the voice recognition button  236  provided in the remote control device  200 . When the voice recognition button  236  is selected, the remote control device  200  can transmit the command for requesting the speech recognition service to the display device  100  through the IR module  223 . 
     As another example, the control unit  170  can receive the command for requesting the speech recognition service through a microphone (not shown) provided in the display device  100 . 
     The control unit  170  can receive an utterance word for providing the speech recognition service, which is input through the microphone, and can prepare to provide the speech recognition service according to the received utterance word. 
     The control unit  170  of the display device  100  receives a voice command (S 603 ). 
     The control unit  170  can receive the voice command uttered by the user from the remote control device  200 . The sound acquisition unit  290  of the remote control device  200  can receive the voice command uttered by the user, and can transmit sound data corresponding to the received voice command to the display device  100  through the wireless communication unit  220 . 
     The wireless communication unit  220  can be a Bluetooth module, but this is only an example. 
     The control unit  170  of the display device  100  acquires usage information of the display device  100  (S 605 ). 
     The usage information of the display device  100  can be information used to provide the speech recognition service in accordance with the intention by determining the intention of the voice command uttered by the user. 
     The control unit  170  can collect the usage information of the display device  100  from before the time when the command for requesting the speech recognition service is received. 
     That is, step S 605  can be performed before step S 601 . 
     The usage information of the display device  100  can include at least one of information on external devices connected through the external device interface unit  135  of the display device  100 , information on applications installed on the display device  100 , information on the interworking devices linked through the wireless communication unit  173  of the display device  100 , or channel information. 
     The information on the external devices connected through the external device interface unit  135  of the display device  100  can include at least one of the name of the external device, the model name of the external device, or the connection type between the external device interface unit  135  and the external device. 
     Here, the connection type can be a type indicating through which interface the external device interface unit  135  and the external device are connected, such as an HDMI terminal or an AV terminal. 
     Here, the external device can be any one of a game console, a set-top box, a DVD player, and a sound bar. 
     The information on the applications installed on the display device  100  can include the name of the application and the service type provided by the application. 
     The information on the interworking devices linked through the wireless communication unit  173  of the display device  100  can include the name of the interworking device and the connection type between the interworking device and the wireless communication unit  173 . 
     Here, the connection type between the interworking device and the wireless communication unit  173  may be a type indicating through which communication standard the interworking device is connected. 
     Configuration channel information can include information on a plurality of channels. 
     Information on each channel can include at least one of a channel name, a channel code used for channel search, or a channel identifier used for executing a channel. 
     On the other hand, the usage information of the display device  100  can be collected by the context manager  103  shown in  FIG. 1 . 
     The control unit  170  of the display device  100  transmits the voice command and the acquired usage information of the display device  100  to the NLP server  510  (S 607 ). 
     The control unit  170  can transmit the voice command and the usage information of the display device  100  to the NLP server  510  through the NLP client  101 . 
     The NLP client  101  can be included in the network interface unit  133  shown in  FIG. 1 . 
     The NLP server  510  acquires the user&#39;s utterance intention based on the voice command and the usage information of the display device  100 , which are received from the display device  100  (S 609 ). 
     The NLP server  510  can acquire the user&#39;s utterance intention by using pattern commands stored in the database  530  shown in  FIG. 5  and the voice command and the usage information of the display device  100  received from the display device  100 . 
     The NLP server  510  can classify the voice command into an operation intention command and a control intention command. 
     The operation intention command can be a command used to analyze the user&#39;s utterance intention through comparison with the pattern command stored in the database  530 . 
     The control intention command can be a command used to analyze the user&#39;s utterance intention by using the usage information of the display device  100 . 
       FIGS. 7 to 9  are views for describing a process in which the NLP server analyzes the user&#39;s utterance intention by using the voice command and the information on the display device, according to an embodiment of the present disclosure. 
     First,  FIG. 7  is described. 
     It is assumed in  FIG. 7  that the voice command uttered by the user is &lt;Open Switch&gt;. 
     The NLP server  510  can convert the voice command into a text by using a Speech To Text (STT) engine. 
     The database  530  can store a plurality of pattern instructions  531  to  535 . 
     Intention information can be matched to each of the plurality of pattern commands  531  to  535 . 
     For example, the first pattern command  531  can be a command indicating a movement of a screen. 
     The second pattern command  533  can be a command indicating a channel change. 
     The third pattern command  535  can be a command indicating access to a website or access to an external device connected to the display device  100 . 
     The plurality of pattern commands  531  to  535  can be stored in the database  530  in the form of text. 
     The NLP server  510  can compare a text  710  corresponding to the voice command transmitted from the display device  100  with the plurality of pattern commands  531  to  535  stored in the database  530 . 
     The NLP server  510  can extract an operation command  711  from the text  710  according to the comparison result. That is, the NLP server  510  can compare the operation command  711  included in the text  710  with the pattern command  535  stored in the database  530 , and can acquire the operation command  711  as the pattern command when the operation command  711  matches the pattern command  535 . 
     The NLP server  510  can determine the operation intention indicating access to the website or access to the external device through the operation command  711 . 
     Thereafter, the NLP server  510  can acquire the remaining commands  713  other than the operation command  711  as the control command. 
     The NLP server  510  can determine the control intention of the control command  713  by using information on the external devices connected through the external device interface unit  135  of the display device  100 . 
     For example, when the text corresponding to the control command is &lt;Switch&gt;  713  and the external device is being connected through the external device interface unit  135 , the NLP server  510  can determine the voice command as an intention indicating a switching of an external input to the connected external device. 
     When the text corresponding to the voice command is &lt;Open game console&gt; and a game console is connected through the external device interface unit  135 , the NLP server  510  can determine the voice command as an intention to switch an external input to the game console. 
     Next,  FIG. 8  is described. 
     It is assumed in  FIG. 8  that the voice command uttered by the user is &lt;go to lg home&gt;. 
     The NLP server  510  can convert the voice command into a text by using an STT engine. 
     The NLP server  510  can compare the converted text  810  with the plurality of pattern commands  531  to  535  stored in the database  530 . 
     When any one of the plurality of pattern commands  531  to  535  is included in the text  810 , the NLP server  510  can acquire the corresponding operation command  811  as the pattern command. 
     The NLP server  510  can determine the operation intention indicating a movement of a screen through the operation command  811 . 
     The NLP server  510  can acquire the commands  813  other than the operation command  811  as the control command. 
     The NLP server  510  can determine the intention of the control command based on the usage information of the display device  100 . 
     When a manufacturer &lt;lg&gt; installs an application for providing a service on the display device  100 , the NLP server  510  can determine the control command as an intention to select a home screen of the corresponding application as a control target. 
     The NLP server  510  can acquire the utterance intention of the operation command  811  and the control command  813  as the intention to move to the home screen of the lg service. 
     Next,  FIG. 9  is described. 
     It is assumed in  FIG. 9  that the voice command uttered by the user is &lt;turn to ABC&gt;. 
     The NLP server  510  can convert the voice command into a text by using an STT engine. 
     The NLP server  510  can compare the converted text  910  with the plurality of pattern commands  531  to  535  stored in the database  530 . 
     When any one of the plurality of pattern commands  531  to  535  is included in the text  910 , the NLP server  510  can acquire the corresponding operation command  911  as the pattern command. 
     The NLP server  510  can determine the operation intention indicating a channel change through the operation command  911 . 
     The NLP server  510  can acquire the commands  913  other than the operation command  911  as the control command. 
     The NLP server  510  can determine the intention of the control command based on the channel information of the display device  100 . 
     When the control command &lt;ABC&gt;  913  is a channel name included in the channel information of the display device  100 , the NLP server  510  can determine the control command  913  as an intention to select the corresponding channel. 
     The NLP server  510  can acquire the utterance intention of the operation command  911  and the control command  913  as an intention to tune to a channel named &lt;ABC&gt;. 
     On the other hand, the database  530  can store only some pattern commands without having to store numerous commands for recognizing the intention of the user&#39;s voice command. Therefore, since there is no need to build a separate dictionary, the load on the NLP server  510  can be reduced. 
     On the other hand, although an example of receiving the user&#39;s utterance intention through the NLP server  510  has been described above, the present disclosure is not limited thereto, and the display device  100  can directly determine the utterance intention. 
     To this end, the display device  100  can include an NLP engine that performs the same function as the NLP server  510 , and can acquire the utterance intention corresponding to the user&#39;s voice command by using the NLP engine. 
     The NLP server  510  transmits utterance intention information including the analysis result of the acquired user&#39;s utterance intention to the display device  100  (S 611 ). 
     The NLP server  510  can transmit, to the display device  100 , the utterance intention information including the utterance intention analysis result corresponding to the user&#39;s voice command in the form of text. 
     The control unit  170  of the display device  100  performs an operation corresponding to the utterance intention information received from the NLP server  510  (S 613 ). 
     The control unit  170  can control the operation of the display device  100  so that the display device  100  performs the operation corresponding to the utterance intention information received from the NLP server  510 . 
     For example, when the utterance intention corresponding to the user&#39;s voice command indicates the switch of the external input, the control unit  170  can switch the external input to an external device connected through the external device interface unit  135 . Therefore, the control unit  170  can output at least one of video or audio input from the external device. 
     As still another example, when the utterance intention corresponding to the user&#39;s voice command indicates the execution of the application installed on the display device  100 , the control unit  170  can display an execution screen of the corresponding application on the display unit  180 . 
     As still another example, when the utterance intention corresponding to the user&#39;s voice command indicates the interworking with the external device connected through the wireless communication unit  173  of the display device  100 , the control unit  170  can output video or audio received from the external device. 
     In this case, the control unit  170  can perform a screen mirroring function for displaying the same video as that displayed by the external device or can perform an audio mirroring function for outputting the same audio as that output by the external device. 
     As still another example, when the utterance intention corresponding to the user&#39;s voice command indicates the channel change, the control unit  170  can switch to a channel having a channel name corresponding to the voice command. 
       FIGS. 10 to 12  are views for describing scenarios in which an operation corresponding to a user&#39;s voice command is performed based on usage information of a display device according to various embodiments of the present disclosure. 
     In  FIGS. 10 to 12 , a user can select the voice recognition button  236  provided in the remote control device  200  and receive a speech recognition service. 
     When the voice recognition button  236  provided in the remote control device  200  is selected, the control unit  170  can receive a command for requesting a speech recognition service from the remote control device  200 . 
     After receiving the command for requesting the speech recognition service, the control unit  170  can collect the usage information of the display device  100 . 
     First,  FIG. 10  is described. 
       FIG. 10  will be described on the assumption that a game console  1000  is connected to the external device interface unit  135  of the display device  100  and a user utters a voice command &lt;open switch&gt;  710 . 
     The remote control device  200  can receive the voice command  710  and transmit the received voice command  710  to the display device  100 . 
     The display device  100  can acquire the utterance intention of the voice command  710 . The process of acquiring the utterance intention is the same as described with reference to  FIG. 7 . 
     When the acquired utterance intention is the input switch to the external device connected through the external device interface unit  135 , the control unit  170  can display a game image  1010  received from the game console  1000  on the display unit  180 . 
     Next,  FIG. 11  is described. 
       FIG. 11  will be described on the assumption that the application providing the services of the manufacturer lg is installed on the display device  100  and a user utters a voice command &lt;go to lg home&gt;  810 . 
     The remote control device  200  can receive the voice command  810  and transmit the received voice command  810  to the display device  100 . 
     The display device  100  can acquire the utterance intention of the voice command  810  in the same way as shown in  FIG. 8 . 
     When the acquired utterance intention is the execution of the application installed on the display device  100 , the control unit  170  can display an execution screen  1100  of the corresponding application on the display unit  180 . 
     Next,  FIG. 12  is described. 
       FIG. 12  will be described on the assumption that the display device  100  displays a broadcast channel image and a user utters a voice command &lt;turn to ABC&gt;  910 . 
     The remote control device  200  can receive the voice command  910  and transmit the received voice command  910  to the display device  100 . 
     When the acquired utterance intention indicates a change to a channel having a channel name of &lt;ABC&gt;, the control unit  170  can change the current channel to the channel having the channel name of &lt;ABC&gt;. As will be described later, according to an embodiment of the present disclosure, channel switching can be supported even for a channel in which a channel code does not exist. 
     According to various embodiments of the present disclosure, a speech recognition service can be provided by recognizing a user&#39;s voice command in accordance with the dynamically changing usage environment of the display device  100 . 
     Therefore, a user&#39;s voice command convenience may be greatly improved. 
     According to an embodiment of the present disclosure, even when the channel code of the channel is &lt;unknown&gt;, channel switching can be performed according to the user&#39;s voice command. 
       FIGS. 13 to 15  are views for describing that even a channel in which a channel code does not exist can be switched to a corresponding channel according to a voice command according to an embodiment of the present disclosure. 
     First, referring to  FIG. 13 , a channel list  1300  stored in the storage unit  140  of the display device  100  is illustrated. 
     The channel list  1300  can include information on a plurality of channels. 
     The information on each of the channels can include at least one of a channel code, a channel name, a channel number, or a channel identifier. 
     The channel code can be a code used to search for a channel. 
     The channel identifier can be an identifier that identifies a channel used to execute (or tune) the corresponding channel. 
     For example, a first channel item  1310  can include information on the first channel. 
     Information on the first channel can include a channel code (251533454), a channel name (BBC TWO), and a channel number (2). 
     A second channel item  1330  can include information on the second channel. 
     The information on the second channel can include a channel name (ABC) and a channel number  885 , but cannot include a channel code (unknown). 
       FIG. 14  is a view illustrating detailed information  1400  on the second channel item  1330 . 
     The detailed information is shown for values of a channel identifier  1401 , a channel name  1403 , a channel number  1405 , and a channel code  1407 . 
     Next,  FIG. 15  is described. 
       FIG. 15  is a view for describing a process of switching to a corresponding channel when the display device  100  receives a voice command including a channel name in which a channel code does not exist. 
       FIG. 15  will be described on the assumption that the user&#39;s voice command is &lt;turn to ABC&gt;. 
     First, the NLP client  101  of the display device  100  can transmit channel information and a user&#39;s voice command to the NLP server  510  (S 1501 ). 
     The channel information can include a channel name, a channel code (unknown), a channel identifier, and a channel number. 
     The NLP server  510  can extract a pattern command (turn to, operation command) from the voice command by using the pattern commands stored in the database  530  (S 1503 ). 
     The NLP server  510  can acquire a control command (ABC) based on the channel information. Here, the control command is a command indicating the channel name. 
     The NLP server  510  can acquire that the utterance intention of the voice command is to switch to the ABC channel. 
     The NLP server  510  can transmit the utterance intent including the channel name information to the NLP client  101  (S 1505 ). 
     The NLP client  101  can acquire a channel identifier based on the received channel name information (S 1507 ). The NLP client  101  can extract a channel identifier corresponding to the channel name ABC from a channel information DB  141  included in the storage unit  140 . 
     The NLP client  101  can transmit the extracted channel identifier to the control unit  170  (S 1509 ). 
     The control unit  170  can tune to a channel corresponding to the channel identifier by using the received channel identifier. 
     As such, according to an embodiment of the present disclosure, even when the channel code is unknown, switching to the corresponding channel can be supported by using the voice command including the channel name. 
     That is, even in countries supporting an online electronic program guide, there are cases in which the channel code is &lt;unknown&gt;. Even in this case, switching to the corresponding channel can be supported through the voice command. 
     On the other hand, according to another embodiment of the present disclosure, the operation of the display device  100  can be performed through the utterance word previously designated by the user. 
     For example, when the voice command &lt;switch&gt; is set to correspond to an external input switching function, the display device  100  can perform external input switching according to reception of the voice command &lt;switch&gt;. 
     As another example, an utterance word including the name of an external input device can be supported. Specifically, when the voice command &lt;switch game console&gt; is set to correspond to the function of switching to a game console connected through an external input, the display device  100  can switch to the external input connected to the game console according to the reception of the voice command &lt;switch game console&gt;. 
     As another example, utterance words including the name of the external input type of the external device interface unit  135  can be supported. Specifically, in the case in which the external device interface unit  135  includes a plurality of HDMI terminals, when HDMI 1 or HDMI 2 is received as the voice command, the display device  100  may switch an external input to an external device connected to the corresponding HDMI terminal. 
     According to an embodiment of the present disclosure, the above-described method can be implemented with codes readable by a processor on a medium in which a program is recorded. Examples of the medium readable 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 can include those implemented in the form of carrier wave (for example, transmission over Internet). 
     The display device described above is not limitedly applicable to the configuration and method of the above-described embodiments, and the embodiments are configured by selectively combining all or part of each of the embodiments such that various modifications can be made.