KR101958781B1 - Terminal and method for controlling the same - Google Patents

Abstract

The present invention relates to a portable terminal that recognizes not only a voice of a user but also a face of a user through a camera, thereby enabling a user to accurately recognize a voice uttered by an actual user and to execute a corresponding function will be.

Description

TECHNICAL FIELD [0001] The present invention relates to a portable terminal,

The present invention relates to a portable terminal and a control method thereof, in which the use of the terminal can be realized by further considering the convenience of the user.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

Currently, a portable terminal such as a smart phone provides a voice recognition function, and a user can easily execute a desired function through voice by inputting voice corresponding to a function to be executed to the portable terminal.

The voice recognition method recognizes all the sounds input through the microphone of the portable terminal in the voice recognition mode when the portable terminal is switched to the voice recognition mode.

At this time, when a voice of another person other than the user voice is inputted through the microphone, it may be recognized that the user can perform a function unintended by the user.

That is, only the voice of the user needs to be recognized and the corresponding function must be executed. However, the portable terminal misinterprets the ambient noise as a voice recognition command, thereby causing the user to perform an undesired function.

An object of the present invention is to provide a portable terminal which recognizes not only a voice of a user but also a face of a user through a camera to accurately recognize a voice uttered by an actual user and execute the corresponding function, Method.

According to an aspect of the present invention, there is provided a portable terminal including: a microphone for inputting a surrounding sound including a voice of a user; A camera for capturing an image including the user; Recognizes a face of a user included in the image and recognizes and recognizes the voice of the user in a surrounding sound input through the microphone based on the recognized face of the user, And a controller for performing an operation corresponding to the voice.

According to another aspect of the present invention, there is provided a method of controlling a portable terminal, the method comprising: switching an operation mode of the portable terminal to a voice recognition mode; Receiving ambient sounds including a user voice through a microphone; Receiving an image including the user through a camera; Recognizing a user face included in the input image; Recognizing and recognizing the user's voice from ambient sounds input through the microphone based on the recognized face of the user; And performing an operation corresponding to the recognized user voice.

The portable terminal and the control method thereof according to the present invention are characterized in that the user recognizes the user's face inputted through the camera at the time of voice recognition mode, It is possible to discriminate only the voice and perform voice recognition.

1 is a block diagram of a portable terminal according to an embodiment of the present invention.
2 is a front perspective view of a portable terminal according to an embodiment of the present invention.
3 is a front view of a portable terminal for explaining an operation state of the portable terminal according to the present invention.
FIG. 4 is a flowchart illustrating a process for improving a voice recognition rate through user face recognition in voice recognition according to the present invention.
5 to 10 are flowcharts illustrating a process of improving the voice recognition rate through user face recognition in speech recognition according to the present invention.

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

The portable terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation. However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to the portable terminal.

1 is a block diagram of a portable terminal according to an embodiment of the present invention.

The portable terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules that enable wireless communication between the wireless terminal 100 and the wireless communication system or between the wireless terminal 100 and a network in which the wireless terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), LTE (Long Term Evolution) .

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the portable terminal 100, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The camera 121 may be provided with two or more (front camera, rear camera) or more, depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the portable terminal 100 such as the open / close state of the portable terminal 100, the position of the portable terminal 100, the presence of the user, the orientation of the portable terminal, And generates a sensing signal for controlling the operation of the portable terminal 100. For example, when the portable terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141 and a light intensity sensor 142.

The illuminance sensor 142 senses the illuminance around the portable terminal 100 and outputs a signal corresponding to the illuminance detected by the illuminance sensor 142 to the controller 180.

The output unit 150 is for generating an output relating to visual, auditory or tactile sense and includes a display unit 151, an acoustic output module 152, an alarm unit 153, a haptic module 154, 155, and the like.

The display unit 151 displays (outputs) the information processed in the portable terminal 100. For example, when the portable terminal 100 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with the call is displayed. When the portable terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received image, UI, or GUI is displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the portable terminal 100. [ For example, in the portable terminal 100, a plurality of display units may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

The proximity sensor 141 may be disposed in an inner region of the portable terminal 100 or in the vicinity of the touch screen, which is enclosed by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception tones, message reception tones, etc.) performed in the portable terminal 100. The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the portable terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or a suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The projector module 155 is a component for performing an image project function using the portable terminal 100 and is similar to the image displayed on the display unit 151 in accordance with a control signal of the controller 180 Or at least partly display another image on an external screen or wall.

Specifically, the projector module 155 includes a light source (not shown) that generates light (for example, laser light) for outputting an image to the outside, a light source And a lens (not shown) for enlarging and outputting the image at a predetermined focal distance to the outside. Further, the projector module 155 may include a device (not shown) capable of mechanically moving the lens or the entire module to adjust the image projection direction.

The projector module 155 can be divided into a CRT (Cathode Ray Tube) module, an LCD (Liquid Crystal Display) module and a DLP (Digital Light Processing) module according to the type of the display means. In particular, the DLP module may be advantageous for miniaturization of the projector module 151 by enlarging and projecting an image generated by reflecting light generated from a light source on a DMD (Digital Micromirror Device) chip.

Preferably, the projector module 155 may be provided on the side surface, the front surface, or the back surface of the portable terminal 100 in the longitudinal direction. It goes without saying that the projector module 155 may be provided at any position of the mobile terminal 100 as occasion demands.

The memory 160 may store a program for processing and controlling the control unit 180 and temporarily store the input / output data (e.g., telephone directory, message, audio, still image, For example. The memory 160 may also store the frequency of use of each of the data (for example, each telephone number, each message, and frequency of use for each multimedia). In addition, the memory unit 160 may store data on vibration and sound of various patterns output when the touch is input on the touch screen.

In addition, the memory 160 may be provided with a face recognition application (or software) for recognizing the face of the user included in the image input from the camera 121 according to the present invention. The face recognition application may be installed in the mobile terminal 100 as a default or downloaded from an external service provider server through the wireless communication unit 110. [

In addition, the memory 160 may include a reference image including a user's face used as a reference of a user's face recognition. The reference image is used to determine whether the face included in the image input from the camera 121 is a user face at the time of recognizing the user's face. That is, if the face in the image input from the camera 121 is the same as the face in the reference image, the face in the image input from the camera 121 is determined as the user face.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, an SD or XD memory A static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM) Magnetic disk, magnetic disk, magnetic disk, or optical disk. The portable terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the portable terminal 100. The interface unit 170 receives data from an external device or receives power from the external device and transmits the data to each component in the portable terminal 100 or allows data in the portable terminal 100 to be transmitted to an external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the usage right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the portable terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the portable terminal 100, or various command signals input from the cradle by the user And may be a passage to be transmitted to the terminal 100. The various command signals input from the cradle or the power source may be operated as a signal for recognizing that the portable terminal 100 is correctly mounted on the cradle.

The controller 180 generally controls the overall operation of the portable terminal 100. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

2 is a perspective view of a portable terminal according to an embodiment of the present invention.

The disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The display unit 151, the sound output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, the interface 170, and the like may be disposed in the front body 101 have.

The display unit 151 occupies most of the main surface of the front case 101. A sound output unit 151 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132 and the interface 170 may be disposed on the side surfaces of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the portable terminal 100 and may include a plurality of operation units 131 and 132. The operation units 131 and 132 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

The contents inputted by the first or second operation unit 131 or 132 may be variously set. For example, the first operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the sound output unit 152 or the size of the sound output from the display unit 151 To the touch recognition mode of the touch screen.

In addition to the antenna for talking and the like, a broadcast signal receiving antenna 116 may be further disposed on the side of the terminal body. The antenna 116, which forms part of the broadcast receiving module 111 (see FIG. 1), can be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the portable terminal 100 is mounted on the terminal body. The power supply unit 190 may be built in the terminal body or may be detachable from the outside of the terminal body.

Hereinafter, a related operation of the display unit 151 and the touch pad 135 will be described with reference to FIG.

3 is a front view of a portable terminal for explaining an operation state of the portable terminal according to the present invention.

Various types of time information can be displayed on the display unit 151. [ These pieces of information can be displayed in the form of letters, numbers, symbols, graphics, or icons.

At least one of the letters, numbers, symbols, graphics, or icons may be displayed in a predetermined arrangement for inputting such information, thereby being implemented as a keypad. Such a keypad may be referred to as a so-called " virtual keypad ".

3 illustrates inputting of a touch applied to the virtual keypad through the front surface of the terminal body.

The display unit 151 may operate as an entire area or may be divided into a plurality of areas and operated. In the latter case, the plurality of areas can be configured to operate in association with each other.

For example, an output window 151a and an input window 151b are displayed on the upper and lower portions of the display unit 151, respectively. The output window 151a and the input window 151b are areas allocated for outputting or inputting information, respectively. In the input window 151b, a virtual keypad 151c is displayed in which a number for inputting a telephone number or the like is displayed. When the virtual keypad 151c is touched, numbers and the like corresponding to the touched virtual keypad are displayed on the output window 151a. When the first operation unit 131 is operated, call connection to the telephone number displayed on the output window 151a is attempted.

In addition, the display unit 151 or the touch pad 135 may be configured to receive a touch input by scrolling. The user can move a cursor or a pointer located on an object displayed on the display unit 151, for example, an icon or the like, by scrolling the display unit 151 or the touch pad 135. [ Further, when the finger is moved on the display portion 151 or the touch pad 135, the path along which the finger moves may be visually displayed on the display portion 151. [ This will be useful for editing the image displayed on the display unit 151. [

One function of the terminal may be executed in response to a case where the display unit 151 (touch screen) and the touch pad 135 are touched together within a predetermined time range. In the case of being touched together, there may be a case where the user clamps the terminal body using the thumb and index finger. The one function may be activation or deactivation of the display unit 151 or the touch pad 135, for example.

For convenience of explanation, it is assumed that the portable terminal 100 mentioned below includes at least one of the components shown in FIG.

Also, a highlight, an arrow or a finger-shaped graphic for pointing a specific object on the display unit 151 or selecting a menu is called a pointer or a cursor.

However, in the case of a pointer, it often means a finger or a stylus pen for a touch operation or the like. Therefore, in this specification, a graphic displayed on the display unit is referred to as a cursor, and a physical means for performing a touch, a proximity touch, and a gesture, such as a finger or a stylus pen, is referred to as a pointer.

Hereinafter, with reference to FIG. 4 to FIG. 10, a process of improving the voice recognition rate through user face recognition in voice recognition according to the present invention will be described in detail.

FIG. 4 is a flowchart illustrating a process for improving a voice recognition rate through user face recognition in voice recognition according to the present invention.

5 to 10 are flowcharts illustrating a process of improving the voice recognition rate through user face recognition in speech recognition according to the present invention.

4 to 10, the controller 180 of the portable terminal 100 selects a voice recognition function among functions provided in the portable terminal 100 through the touch screen 151 or the user input unit 130 , The current operation mode of the portable terminal 100 is switched to the voice recognition mode (S110), the microphone 122 is driven as a user voice input means, and ambient sound is received through the microphone 122 (S115).

At this time, the surrounding sound may include only the user's voice, only surrounding noise, or surrounding noise and user's voice.

In the following description of the present invention, it is assumed that the ambient noise includes ambient noise and user voice.

The control unit 180 measures the noise level of the ambient sound received through the microphone 122 (S120). If the measured noise level of the ambient sound is equal to or greater than a preset reference value (S125) And drives the camera 121 (S130).

That is, when the measured noise level of the surrounding sound is large, the user's voice is not well recognized due to the large noise of the user's voice other than the user's voice. Therefore, 122, it is possible to improve the voice recognition rate of the user by recognizing only the voice inputted in the section actually spoken by the user.

In this case, the reference value may be a decibel value corresponding to ambient noise when the user's voice is not normally recognized.

On the other hand, if the noise level of the measured ambient sound is below the preset reference value, the controller 180 is in a quiet state so that the user's voice can be recognized in the surrounding noise state. Therefore, Recognizes the user's voice from the received ambient sound, and performs an operation corresponding to the recognized user's voice.

That is, although the surrounding noise is quiet enough to recognize the user's voice from the current ambient sound, recognizing the user's face by driving the camera 121 unnecessarily consumes the battery power of the portable terminal 100, In the present invention, the camera 121 is driven to recognize the user's face only when the noise level of the ambient sound is equal to or higher than the reference value, and the camera 121 is turned off when the noise level of the ambient sound is lower than the reference value. In addition, even if the current camera 121 is driven for user face recognition, the camera 121 can be turned off when the noise level of the ambient sound changes from a reference value to a reference value or less.

4, the control unit 180 recognizes the user's face in the input image (S135) when the image including the user is input through the driven camera 121 (step S135) S140].

In this case, the memory 160 may be provided with a face recognition application (or software) for recognizing the user's face included in the image input from the camera 121, The face recognition application can be activated and the user's face and the area corresponding to the eyes and mouth in the face can be recognized in the image input from the camera 121 through the face recognition application.

In addition, the memory 160 may include a reference image including a user's face used as a reference of the user's face recognition, and the control unit 180 may include a user's face in the reference image, If the face included in the image input from the camera 121 matches or is similar to the face included in the input image from the camera 121, the face included in the image input from the camera 121 is determined as a user face, It is possible to discriminate the eyes and mouth of the face included in the input image.

As described above, when the face of the user is recognized in the image input from the camera 121 (S140), the control unit 180 determines whether or not the face of the user is recognized through the microphone 122 based on the recognized face of the user (S155). In step S155, the user's voice is recognized in step S145, the recognized user's voice is recognized in step S150, and the mapped operation corresponding to the recognized user's voice is performed.

At this time, the control unit 180 recognizes a section in which the face shape of the face is changed based on the recognized face of the user, and discriminates the surrounding sound input from the microphone 122 during the recognized section as a voice of the user can do.

That is, the ambient sound received by the microphone 122 may be a noise first, followed by a user voice, or vice versa. Therefore, it is highly likely that the user's voice will be included in the surrounding sound input during the period in which the mouth shape of the user changes, and the possibility that ambient noise is included in the surrounding sound input during the period in which the user's mouth shape is unchanged It is determined that the surrounding sound input during the period in which the mouth shape of the user is changed is the user's voice.

In addition, the control unit 180 recognizes a section during which the face of the face faces the camera 121 based on the recognized face of the user, and recognizes the surrounding sound input from the microphone 122 during the recognized interval It can be discriminated by the user's voice.

That is, when the eyeball of the user faces the camera 121 or the front of the portable terminal 100, it is very likely that the user is speaking a voice to be recognized by the portable terminal 100, It is very likely that the user does not speak the voice to be recognized by the portable terminal 100. This is because the user's eyes are moved to the camera 121 or the portable terminal 100, Is a user's voice.

Hereinafter, the process of improving the voice recognition rate through user face recognition in speech recognition according to the present invention will be described in detail with reference to FIG. 5 to FIG.

First, as shown in FIG. 5A, the control unit 180 receives ambient sounds including the user voice 311 from the microphone 122 in the voice recognition mode 310, (b), if the noise of the inputted surrounding sound is not less than the reference value and the voice recognition is not successful, the camera 121 is driven to recognize the user's face. In this case, FIG. 5 shows an example in which the voice of the user to recognize speech is "Today's weather" (311).

5 (c), the control unit 180 recognizes the user's face in the image input through the camera 121, and based on the recognized user's face, Recognizes the input peripheral sound as the user voice 311 and performs an operation 320 corresponding to the recognized user voice 311 as shown in FIG. 5 (d).

That is, since the user voice 311 is "today's weather ", the control unit 180 drives the provided weather information providing related application to display information 320 corresponding to" today's weather " (110) to search for and display "Today's weather" on the web.

At this time, as shown in FIG. 6, the controller 180 can recognize the inputted ambient sound as a voice of the user during a period in which the mouth shape of the face is changed.

That is, as shown in FIG. 6A, the ambient sound input through the microphone 122 may be mixed or included with the noise 312 and the user voice 311.

That is, the control unit 180 recognizes an area corresponding to the mouth of the user's face input through the camera 121, and changes the color, pixel, etc. of the area corresponding to the mouth, And recognizes a surrounding sound input through the microphone 122 as a user voice 311 during a period in which the mouth shape of the user is changed.

6 (b), the controller 180 recognizes the user's voice 311 input through the microphone 122 during a period in which the mouth shape of the user changes, and outputs the user's voice 311 As shown in FIG.

Next, as shown in FIG. 7, the controller 180 can recognize the surrounding sound input during the period when the face of the face faces the portable terminal 100 as a user's voice.

That is, as shown in FIG. 7A, the controller 180 recognizes the direction indicated by the eyeball (pupil or iris) in the user's face input through the camera 121, The surround sound inputted through the microphone 122 is discriminated to be the user voice 311 during the period for which the portable terminal 100 is facing. At this time, the direction of the eyeball toward the portable terminal 100 may be a direction toward the front when the user's face is displayed on the display unit 151 of the portable terminal 100.

7B, the controller 180 recognizes the user's voice 311 input through the microphone 122 when the eye of the user is facing the portable terminal 100, And performs an operation corresponding to the voice 311.

8 and 9, when recognizing the face of the user, the control unit 180 drives the flash of the camera 121 to recognize the face recognition rate You can raise it.

For example, as shown in FIG. 8A, when the face recognition of the user is failed from the image input through the camera 121, the controller 180 determines that the surrounding illumination is low, , The flash of the camera 121 is driven and the face recognition operation of the user is performed again from the image input from the camera 121 after the flash is driven as shown in FIG. 8 (b) .

9 (a), if the noise of the surrounding sound inputted through the microphone 122 is not less than the reference value and the speech recognition is not successful, the controller 180 may control the camera 121.

Then, the controller 180 drives the illuminance sensor 142 and measures the illuminance around the portable terminal 100. If the measured ambient illuminance is less than a predetermined reference value, even if an image including the user's face is input through the camera 121, the user's face can not be recognized due to low illumination. The control unit 180 drives the flash of the camera 121 and performs the face recognition operation of the user again from the image input from the camera 121 after the flash is driven.

Finally, as shown in FIG. 10 below, the controller 180 determines whether the mouth shape of the face is changed or the eye of the face faces the portable terminal 100 based on the recognized face of the user It is possible to recognize the ambient sound input through the microphone 122 as noise and to request the user to increase the voice size to voice recognition.

10 (a), the control unit 180 determines whether the mouth shape of the user's face inputted through the camera 121 is changed or the eye of the face is directed toward the portable terminal 100 When not present, it is possible to induce the user to say a loud voice by displaying information requesting that the user speak loudly on the screen.

10 (b), the control unit 180 determines whether the mouth shape of the user's face inputted through the camera 121 is changed or the eye of the face is directed toward the portable terminal 100 It is possible to induce the user to say a loud voice by outputting a sound that the user requests to speak loudly through the sound output module 152. [

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also implemented in the form of a carrier wave (for example, transmission over the Internet) . Also, the computer may include a controller 180 of the portable terminal.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

The above-described mobile terminal and its control method are not limited to the configuration and method of the above-described embodiments, but the embodiments may be modified such that all or some of the embodiments are selectively And may be configured in combination.

100: mobile terminal 110: wireless communication unit
111: broadcast receiver 112: mobile communication module
113 wireless Internet module 114 short-range communication module
115: Position information module 120: A / V input section
121: camera 122: microphone
130: user input unit 140: sensing unit
141: proximity sensor 142: illuminance sensor
150: output unit 151: display unit
152: Audio output module 153: Alarm module
154: Haptic module 155: Projector module
160: memory 170: interface section
180: control unit 181: multimedia module
190: Power supply

Claims (10)

A microphone for inputting a surrounding sound including a voice of a user;
A camera for capturing an image including the user; And
Recognizes a face of a user included in the image and recognizes and recognizes the voice of the user in a surrounding sound input through the microphone based on the recognized face of the user, And a controller for performing an operation corresponding to the voice,
Wherein,
When the noise level of the ambient sound input from the microphone is greater than a reference value in the voice recognition mode, the camera is driven, the user face included in the image input by the camera is recognized,
Wherein when the noise level of the ambient sound inputted from the microphone is smaller than the reference value during driving the camera, the driving of the camera is turned off, the sound is recognized using only the ambient sound input through the microphone,
Recognizing a direction of an eyeball of the face based on the recognized face,
And recognizes the ambient sound input during a period in which the recognized direction is directed to the portable terminal as a user voice for voice recognition. delete delete The method according to claim 1,
Wherein the control unit drives the flash provided in the camera when the user's face recognition in the image fails. The method according to claim 1,
And an illuminance sensor for measuring illuminance around the portable terminal,
Wherein the control unit drives the flash provided in the camera when the illuminance measured by the illuminance sensor is less than a reference value. The method according to claim 1,
Wherein the control unit recognizes, as a user voice for voice recognition, a surrounding sound input during a period in which the mouth shape of the face is changed based on the recognized face. The method according to claim 1,
Wherein the control unit recognizes the surrounding sound input during a period in which the mouth shape of the face does not change as peripheral noise based on the recognized face and requests the user to increase the voice size, . 8. The method of claim 7,
A display unit; And
And an audio output unit,
Wherein the control unit displays the information requesting the user to increase the voice size on the display unit or outputs a sound requesting the user to increase the voice size through the sound output unit. . delete delete

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