KR20150027592A - Speech recognition apparatus and method thereof - Google Patents

Abstract

The present specification relates to a speech recognition device capable of accurately recognizing a user speech by changing a threshold according to the usage pattern of a user and a method thereof. The speech recognition device disclosed in the present specification includes: a speech recognition unit which recognizes a user speech based on predefined speech models providing a reliability score; and a control unit which accepts or rejects the recognized user speech based on the reliability score and threshold of the recognized user speech. The control unit may change the threshold according to the usage speech pattern of the user.

Description

[0001] SPEECH RECOGNITION APPARATUS AND METHOD THEREOF [0002]

The present invention relates to a speech recognition apparatus and a method thereof.

In general, a speech recognition apparatus according to the related art receives a voiced speech signal when the user utterances, compares the received speech signal with a predetermined model, and recognizes the user speech according to the comparison result do. That is, the speech recognition system according to the prior art recognized a user's voice through a confidence measurement method. The speech recognition apparatus according to the prior art is disclosed in Korean Patent Application No. 10-2009-0057093.

It is an object of the present invention to provide a speech recognition apparatus and method which can accurately recognize a user's voice by changing a threshold according to a pattern of user's use.

A speech recognition apparatus according to an embodiment disclosed herein includes a speech recognition unit that recognizes a user speech based on predetermined speech models that provide a reliability score; And a control unit for allowing or rejecting the recognized user voice based on the reliability score and the threshold of the recognized user voice, and the control unit can change the threshold value according to the user-used voice pattern.

As an example related to the present specification, the control unit may increase or decrease the threshold value according to the user-used voice pattern.

As an example related to the present specification, the control unit may allow the recognized user voice if the reliability score of the recognized user voice is higher than the increased or decreased threshold.

As an example related to the present specification, the control unit may reject the recognized user voice if the reliability score of the recognized user voice is lower than the increased or decreased threshold.

According to an embodiment of the present invention, the controller may change the threshold value based on the user-used voice pattern classified in advance according to the function of the video display device.

As one example related to the present specification, the pre-classified voice pattern for user use includes a usage rate of a first user voice for controlling a channel and a volume of the video display device, At least one of a usage rate of two user's voice, a usage rate of a third user's voice for executing an application program through the video display device, and a usage rate of a fourth user's voice for searching for a broadcast program of the video display device Wherein the voice processing apparatus comprises:

As an example related to the present specification, the controller may set the user-used voice pattern in advance.

As an example related to the present specification, the control unit may receive the user use voice pattern from the server.

As an example related to the present specification, the usage rate of the user voice may be the usage rate of the user average usage voice.

As an example related to the present specification, when a plurality of user's voices having similar pronunciation are recognized, the control unit can increase the recognition probability of a plurality of user voices having the similar pronunciation by increasing the threshold.

A speech recognition method according to an embodiment disclosed herein includes recognizing a user speech based on predetermined speech models providing a confidence score; Changing a threshold value according to a user-used voice pattern; And allowing or rejecting the recognized user voice based on the reliability score of the recognized user voice and the threshold value.

The speech recognition apparatus and method according to the embodiments of the present invention change a threshold value according to a pattern of user use (a usage rate of each user voice classified in advance according to functions of an electronic device such as a video display device or a mobile communication terminal) The user's voice can be accurately recognized.

The speech recognition apparatus and method according to embodiments of the present invention can recognize a user's voice accurately by changing a threshold value according to a function pattern of a user using function (a usage rate of each function of an electronic device such as a video display device or a mobile communication terminal) .

1 is a block diagram showing an image display apparatus and an external input apparatus according to the present invention.
2 is a block diagram illustrating the configuration of a 3D image display apparatus to which an image processing apparatus according to embodiments of the present invention is applied.
3 is a flowchart illustrating a speech recognition method according to an embodiment of the present invention.
4 is a diagram illustrating an example of a voice pattern used by a user according to an embodiment of the present invention.
5 is a flowchart illustrating a speech recognition method according to another embodiment of the present invention.
FIG. 6 is a view illustrating an example of a user-using function pattern according to an embodiment of the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. Further, when a technical term used herein is an erroneous technical term that does not accurately express the spirit of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art are replaced. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In the present application, the term "comprising" or "comprising" or the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps.

Furthermore, terms including ordinals such as first, second, etc. used in this specification can be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

In this specification, an image display apparatus includes both a device for receiving and displaying a broadcast, a device for recording and reproducing a moving image, and a device for recording and reproducing audio. Hereinafter, as an example of this, a television will be described as an example.

1 is a block diagram showing an image display apparatus 100 and an external input apparatus 190 according to the present invention. The video display apparatus 100 includes a tuner 110, a demodulator 120, a signal input / output unit 130, an interface unit 140, a control unit 150, a storage unit 160, a display unit 170, And an output unit 180. However, the external input device 190 may be a separate device from the image display device 100, or may be included as a component of the image display device 100. [

1, a tuner 110 selects an RF broadcast signal corresponding to a channel selected by a user from among RF (Radio Frequency) broadcast signals received through an antenna, converts the RF broadcast signal into an intermediate frequency signal or a baseband image / Convert to voice signal. For example, if the RF broadcast signal is a digital broadcast signal, the tuner 110 converts the RF broadcast signal into a digital IF signal (DIF). On the other hand, if the RF broadcast signal is an analog broadcast signal, the tuner 110 converts the RF broadcast signal into an analog baseband video / audio signal (CVBS / SIF). As described above, the tuner 110 may be a hybrid tuner capable of processing a digital broadcasting signal and an analog broadcasting signal.

The digital IF signal DIF output from the tuner 110 is input to the demodulator 120 and the analog baseband video / audio signal CVBS / SIF output from the tuner 110 is input to the controller 160 . The tuner 120 can receive an RF broadcast signal of a single carrier according to an Advanced Television Systems Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Although one tuner 110 is shown in the drawing, the present invention is not limited thereto. The video display device 100 may include a plurality of tuners, for example, first and second tuners. In this case, the first tuner may receive the first RF broadcast signal corresponding to the broadcast channel selected by the user, and the second tuner may sequentially or periodically receive the second RF broadcast signal corresponding to the previously stored broadcast channel . The second tuner can convert the RF broadcast signal into a digital IF signal (DIF) or an analog baseband video / audio signal (CVBS / SIF) in the same manner as the first tuner. In the embodiments of the present invention, by using only one tuner 110, the manufacturing cost can be reduced accordingly.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation. For example, if the digital IF signal DIF output from the tuner 110 is of the ATSC scheme, the demodulator 120 performs an 8-VSB (8-Vestigal Side Band) demodulation. At this time, the demodulator 120 may perform channel decoding such as trellis decoding, de-interleaving, and Reed-Solomon decoding. For this, the demodulator 120 may include a trellis decoder, a de-interleaver, and a Reed Solomon decoder.

For example, if the digital IF signal DIF output from the tuner 110 is of the DVB scheme, the demodulator 120 performs COFDMA (Coded Orthogonal Frequency Division Modulation) demodulation. At this time, the demodulator 120 may perform channel decoding such as convolutional decoding, deinterleaving, and Reed-Solomon decoding. For this, the demodulator 120 may include a convolution decoder, a deinterleaver, and a Reed-Solomon decoder.

The signal input / output unit 130 may be connected to an external device to perform signal input and output operations, and may include an A / V input / output unit and a wireless communication unit.

The A / V I / O section is composed of an Ethernet terminal, a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S- video terminal (analog), a DVI (digital visual interface) terminal, , A Mobile High-definition Link (MHL) terminal, an RGB terminal, a D-SUB terminal, an IEEE 1394 terminal, a SPDIF terminal, and a liquid HD terminal. The digital signal input through these terminals may be transmitted to the control unit 150. At this time, the analog signal inputted through the CVBS terminal and the S-video terminal may be converted into a digital signal through an analog-digital converter (not shown) and transmitted to the controller 150.

The wireless communication unit can perform a wireless Internet connection. For example, the wireless communication unit performs wireless Internet access using a WLAN (Wi-Fi), a Wibro (wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) can do. In addition, the wireless communication unit can perform short-range wireless communication with other electronic devices. For example, the wireless communication unit can perform near field wireless communication using Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee have.

The signal input / output unit 130 may be a video input / output unit for inputting video signals and audio signals provided from external devices such as a digital versatile disk (DVD) player, a Blu-ray player, a game device, a camcorder, Signals and data signals to the controller 150. [ The controller 150 can also transmit video signals, audio signals, and data signals of various media files stored in an external storage device such as a memory device, a hard disk, and the like. In addition, the video signal, audio signal, and data signal processed by the control unit 150 can be output to other external apparatuses.

The signal input / output unit 130 may be connected to a set top box, for example, a set top box for IPTV (Internet Protocol TV) through at least one of the various terminals described above to perform signal input and output operations. For example, the signal input / output unit 130 can transmit a video signal, an audio signal, and a data signal processed by the settop box for IPTV to the controller 150 so as to enable bidirectional communication, Signals to IPTV set-top boxes. Here, the IPTV may include ADSL-TV, VDSL-TV, FTTH-TV, etc. classified according to the transmission network.

The digital signal output from the demodulation unit 120 and the signal output unit 130 may include a stream signal TS. The stream signal TS may be a signal in which a video signal, an audio signal, and a data signal are multiplexed. For example, the stream signal TS may be an MPEG-2 TS (Transprt Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Here, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The interface unit 140 may receive an input signal for power control, channel selection, screen setting, etc. from the external input device 190, or may transmit the signal processed by the control unit 160 to the external input device 190 . The interface unit 140 and the external input device 190 may be connected by wire or wirelessly.

As an example of the interface unit 140, a sensor unit may be provided, and the sensor unit is configured to sense the input signal from a remote controller, for example, a remote controller.

The network interface unit (not shown) provides an interface for connecting the video display device 100 to a wired / wireless network including the Internet network. The network interface unit may include an Ethernet terminal or the like for connection with a wired network and may be a wireless LAN (WLAN) (Wi-Fi), a Wibro (wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) communication standards, and the like.

A network interface unit (not shown) can access a predetermined web page via a network. That is, it is possible to access a predetermined web page through a network and transmit or receive data with the server. In addition, content or data provided by a content provider or a network operator can be received. That is, it can receive contents such as a movie, an advertisement, a game, a VOD, a broadcast signal, and related information provided from a content provider or a network provider through a network. In addition, the update information and the update file of the firmware provided by the network operator can be received. It may also transmit data to the Internet or a content provider or network operator.

Also, the network interface unit (not shown) can select and receive a desired application among the applications open to the public via the network.

The control unit 150 may control the overall operation of the image display apparatus 100. [ More specifically, the control unit 150 is configured to control generation and output of an image. For example, the controller 150 may control the tuner 110 to tuning an RF broadcast signal corresponding to a channel selected by the user or a previously stored channel. Although not shown in the figure, the controller 150 may include a demultiplexer, an image processor, a voice processor, a data processor, an OSD (On Screen Display) generator, and the like. In addition, the control unit 150 may include a CPU, a peripheral device, and the like in hardware.

The control unit 150 may demultiplex the stream signal TS, for example, the MPEG-2 TS into a video signal, a voice signal, and a data signal.

The control unit 150 may perform image processing, e.g., decoding, on the demultiplexed video signal. In more detail, the control unit 150 decodes an MPEG-2 standard-encoded video signal using an MPEG-2 decoder, and encodes the video signal in accordance with a DMB (Digital Multimedia Broadcasting) scheme or an H It is possible to decode the encoded video signal of the .264 standard. In addition, the controller 150 may perform image processing such that the brightness, tint, and color of the image signal are adjusted. The image signal processed by the control unit 150 may be transmitted to the display unit 170 or may be transmitted to an external output device (not shown) through an external output terminal.

The control unit 150 may perform speech processing, e.g., decoding, on the demultiplexed speech signal. More specifically, the control unit 150 decodes an MPEG-2 standard-encoded audio signal using an MPEG-2 decoder, and uses an MPEG 4 decoder to decode an MPEG 4 bit sliced arithmetic coding Decodes the encoded voice signal, and decodes the encoded voice signal of the AAC (Advanced Audio Codec) standard of MPEG 2 according to the satellite DMB scheme or DVB-H using the AAC decoder. In addition, the controller 150 may process a base, a treble, a volume control, and the like. The voice signal processed in the control unit 150 may be transmitted to the audio output unit 180, for example, a speaker, or may be transmitted to an external output device.

The control unit 150 may perform signal processing on the analog baseband video / audio signal (CVBS / SIF). Here, the analog baseband video / audio signal CVBS / SIF input to the controller 150 may be an analog baseband video / audio signal output from the tuner 110 or the signal input / output unit 130. The signal-processed video signal is displayed through the display unit 170, and the signal-processed audio signal is output through the audio output unit 180.

The control unit 150 may perform data processing, for example, decoding, on the demultiplexed data signal. Here, the data signal may include electronic program guide (EPG) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on each channel. The EPG information includes, for example, TSC-PSIP (ATSC-Program and System Information Protocol) information in the ATSC scheme and DVB-SI information (DVB-SI information) in the DVB scheme. The ATSC-PSIP information or the DVB-SI information may be included in the header (4 bytes) of the MPEG-2 TS.

The controller 150 may perform a control operation for the OSD process. In more detail, the control unit 150 may include at least one of an image signal and a data signal, or an OSD for displaying various information in a graphic or text form based on an input signal received from the external input device 190. [ Signal can be generated. The OSD signal may include various data such as a user interface screen of the image display apparatus 100, a menu screen, a widget, and an icon.

The storage unit 160 may store a program for signal processing and control of the controller 150 or may store a video signal, a voice signal, and a data signal. The storage unit 160 may be a flash memory, a hard disk, a multimedia card micro type, a card type memory (for example, SD or XD memory), a random access (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM) Or at least one storage medium.

The display unit 170 may convert a video signal, a data signal, an OSD signal, etc. processed by the controller 150 into an RGB signal to generate a driving signal. Thus, the display unit 170 outputs an image. The display unit 170 may be a plasma display panel (PDP), a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), an organic light emitting diode A light emitting diode (OLED), a flexible display, a three-dimensional display (3D display), and an electronic ink display (e-ink display). The display 180 may also be implemented as a touch screen to perform the functions of an input device.

The audio output unit 180 outputs the audio signal processed by the control unit 150, for example, a stereo signal or a 5.1-channel signal. The audio output unit 180 may be implemented by various types of speakers.

On the other hand, a photographing unit (not shown) for photographing a user can be further provided. The photographing unit (not shown) may be implemented by a single camera, but the present invention is not limited thereto, and may be implemented by a plurality of cameras. The image information photographed by the photographing unit (not shown) is input to the control unit 150.

In order to detect a user's gesture, a sensing unit (not shown) having at least one of a touch sensor, a voice sensor, a position sensor, and an operation sensor may be further provided in the image display apparatus 100 have. The signal sensed by the sensing unit (not shown) may be transmitted to the controller 150 through the user input interface unit 140.

The control unit 150 may detect the gesture of the user by combining the images photographed by the photographing unit (not shown) or sensed signals from the sensing unit (not shown).

A power supply unit (not shown) supplies power to the entire video display device 100. Particularly, it is possible to supply power to a control unit 150 that can be implemented in the form of a system on chip (SOC), a display unit 170 for displaying an image, and an audio output unit 180 for audio output .

To this end, the power supply unit (not shown) may include a converter (not shown) for converting AC power to DC power. Meanwhile, for example, when the display unit 170 is implemented as a liquid crystal panel having a plurality of backlight lamps, an inverter (not shown) that can perform PWM operation for variable luminance or dimming driving is further provided It is possible.

The external input device 190 is connected to the interface 140 via a wired or wireless network and transmits an input signal generated according to a user input to the interface 140. The external input device 190 may include a remote controller, a mouse, a keyboard, and the like. The remote controller can transmit an input signal to the interface unit 140 through Bluetooth, RF communication, infrared communication, UWB (Ultra Wideband), ZigBee, or the like. The remote controller can be implemented as a space remote controller. The spatial remote control device can detect an operation of the main body in a space and generate an input signal.

The video display apparatus 100 may be a digital broadcasting system of an ATSC system (8-VSB system), a digital broadcasting system of a DVB-T system (COFDM system), a digital broadcasting system of a DVB-C system (QAM system) ) Digital broadcasting, an ISDB-T (BST-OFDM) digital broadcasting, or the like. In addition, the video display device 100 may be a terrestrial DMB digital broadcasting, a satellite DMB digital broadcasting, an ATSC-M / H digital broadcast, a DVB-H (COFDM) digital broadcast, a Media Foward Link Only) type digital broadcasting, or the like. Also, the video display device 100 may be implemented as a digital broadcast receiver for cable, satellite communication, and IPTV.

Meanwhile, the video display device of the present invention is configured to provide a stereoscopic image. The term 3-D or 3D is used to describe a visual representation or display technique that attempts to reproduce a stereoscopic image (hereinafter, referred to as '3D image') having an optical illusion of depth. For the left eye and right eye images, the visual cortex of the observer interprets the two images as a single 3D image.

Three-dimensional (3D) display technology employs 3D image processing and representation techniques for devices capable of displaying 3D images. Alternatively, a device capable of 3D image display may have to use a special viewing device to effectively provide a three-dimensional image to an observer.

Examples of 3D image processing and representation include stereoscopic image / video capture, multi-view video / video capture using multiple cameras, and processing of two-dimensional images and depth information. Examples of the display device capable of 3D image display include an LCD (Liquid Crystal Display), a digital TV screen, and a computer monitor with appropriate hardware and / or software supporting 3D image display technology. Examples of special viewing devices include specialized glasses, goggles, headgear, and eyewear.

Specifically, the 3D image display technology can be applied to anaglyph stereoscopic images (commonly used with passive red-eye glasses), polarized stereoscopic images (commonly used with passive polarized glasses), alternate-frame sequencing ) (Commonly used with active shutter glasses / headgear), autostereoscopic displays using lenticular or barrier screens, and the like.

For 3D image processing, a stereo image or multi-view image can be compression-coded and transmitted in various ways including MPEG (Moving Picture Experts Group). For example, a stereo image or a multi-view image may be compression-coded and transmitted by the H.264 / AVC (Advanced Video Coding) method. At this time, the receiving system can obtain the 3D image by decoding the reception image inversely to the H.264 / AVC coding scheme. In this case, the receiving system may be provided as one configuration of the 3D stereoscopic image display apparatus.

Hereinafter, the configuration of the 3D stereoscopic image display device 200 will be described with reference to FIG.

2 is a block diagram illustrating the configuration of a 3D image display apparatus to which an image processing apparatus according to embodiments of the present invention is applied.

2, the 3D image display apparatus 200 according to embodiments of the present invention includes a tuner 210, a demodulator 220, an external device interface 230, a network interface 235, A storage unit 240, a user input interface unit 250, a control unit 270, a display unit 280, an audio output unit 285, and a 3D viewing device 295. Hereinafter, the same components as those in FIG. 1 will be described with emphasis on the portions related to the output of the 3D image, and the portions overlapping with the above-described portions will be omitted.

The tuner (tuner unit) 210 receives the broadcast signal, detects the signal, corrects the error, and generates a transport stream for the left eye and right eye images.

The demodulator 220 may be a first decoder that decodes the reference view video and a second decoder that decodes the extended view video. In this case, the video stream is output to the first decoder by the demultiplexing unit if the video stream corresponds to the reference view video, and is output to the second decoder when the video stream corresponds to the video stream of the extension viewpoint.

The external device interface unit 230 can transmit or receive data with the connected external device. To this end, the external device interface unit 230 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 230 is connected to an external device (not shown) such as a DVD (Digital Versatile Disk), a Blu ray, a game device, a camera, a camcorder, . The external device interface unit 230 transmits external video, audio, or data signals to the controller 270 of the video display device 200 through the connected external device. Also, the control unit 270 can output the processed video, audio, or data signal to the connected external device. To this end, the external device interface unit 230 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

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

The wireless communication unit can perform short-range wireless communication with other electronic devices. The video display device 200 may be a communication device such as a Bluetooth, a Radio Frequency Identification (RFID), an IrDA, an Ultra Wideband (UWB), a ZigBee, a Digital Living Network Alliance Depending on the standard, it can be networked with other electronic devices.

Also, the external device interface unit 230 may be connected to the various set-top boxes via at least one of the various terminals described above to perform input / output operations with the set-top box.

On the other hand, the external device interface unit 230 can transmit and receive data to and from the 3D viewing device 295.

The network interface unit 235 provides an interface for connecting the video display device 200 to a wired / wireless network including the Internet network. The network interface unit 235 may include an Ethernet terminal and the like for connection to a wired network and may be a WLAN (Wireless LAN) (Wi-Fi), a Wibro (Wireless) broadband), Wimax (World Interoperability for Microwave Access), and HSDPA (High Speed Downlink Packet Access) communication standards.

The network interface unit 235 can receive, via the network, contents or data provided by the Internet or a content provider or a network operator. In other words, it is possible to receive contents such as movies, advertisements, games, VOD, broadcasting signals, and related information provided from the Internet and contents providers through a network. In addition, the update information and the update file of the firmware provided by the network operator can be received. It may also transmit data to the Internet or a content provider or network operator.

The network interface unit 235 is connected to, for example, an IP (Internet Protocol) TV, receives the processed video, audio, or data signals from the settop box for IPTV, And can transmit the signals processed by the controller 270 to the IPTV set-top box.

Meanwhile, the IPTV may include ADSL-TV, VDSL-TV, FTTH-TV and the like depending on the type of the transmission network. The IPTV may include a TV over DSL, a video over DSL, a TV over IP BTV), and the like. In addition, IPTV may also mean an Internet TV capable of accessing the Internet, or a full browsing TV.

The storage unit 240 may store a program for each signal processing and control in the control unit 270, and may store image-processed video, audio, or data signals.

In addition, the storage unit 240 may perform a function for temporarily storing video, audio, or data signals input to the external device interface unit 230. In addition, the storage unit 240 may store information on a predetermined broadcast channel through a channel memory function such as a channel map.

The storage unit 240 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) RAM, ROM (EEPROM, etc.), and the like. The video display device 200 can reproduce files (moving picture files, still picture files, music files, document files, etc.) stored in the storage unit 240 and provide them to the user. 2 illustrates an embodiment in which the storage unit 240 is provided separately from the control unit 270, the scope of the present invention is not limited thereto. The storage unit 240 may be included in the controller 270.

The description of the user input interface unit 250 is replaced with the description of the interface unit 140 described above with reference to FIG.

The control unit 270 demultiplexes the input stream or processes the demultiplexed signals through the tuner 210 or the demodulation unit 220 or the external device interface unit 230 to generate a signal for video or audio output Can be generated and output.

The image signal processed by the controller 270 may be input to the display unit 280 and displayed as an image corresponding to the image signal. In addition, the video signal processed by the controller 270 may be input to the external output device through the external device interface 230.

The audio signal processed by the control unit 270 may be output to the audio output unit 285 by sound. The audio signal processed by the control unit 270 may be input to the external output device through the external device interface unit 230.

The control unit 270 may include a demultiplexing unit, an image processing unit, and the like. The control unit 270 can control the overall operation in the video display device 200. [ For example, the controller 270 controls the tuner 210 to control the tuner 210 to select an RF broadcast corresponding to a channel selected by the user or a previously stored channel.

In addition, the controller 270 can control the image display apparatus 200 according to a user command or an internal program input through the user input interface unit 250.

For example, the controller 270 controls the tuner 210 to input a signal of a selected channel according to a predetermined channel selection command received through the user input interface unit 250. Then, video, audio, or data signals of the selected channel are processed. The control unit 270 allows the display unit 280 or the audio output unit 285 to output the video or audio signal processed by the user through the channel information or the like selected by the user.

For example, the control unit 270 may be connected to the external device interface unit 230 via the external device interface unit 230, for example, a camera or a camcorder, according to an external device video playback command received through the user input interface unit 250 So that the video signal or the audio signal of the video signal can be output through the display unit 280 or the audio output unit 285.

The control unit 270 may control the display unit 280 to display an image. For example, the broadcast image input through the tuner 210, the external input image input through the external device interface unit 230, the image input through the network interface unit 235, or the image stored in the storage unit 240 Can be displayed on the display unit 280. At this time, the image displayed on the display unit 280 may be a still image or a moving image, and may be a 2D image or a 3D image.

The control unit 270 generates a 3D object for a predetermined object among the images displayed on the display unit 280, and displays the 3D object. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), EPG (Electronic Program Guide), various menus, widgets, icons, still images, moving images, and text. The 3D object may be processed to have a depth different from that of the image displayed on the display unit 280. The control unit 270 can process the 3D object such that the 3D object is protruded from the image displayed on the display unit 280. [

The control unit 270 recognizes the position of the user based on the image photographed from the photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 200 can be grasped. In addition, the x-axis coordinate and the y-axis coordinate in the display unit 280 corresponding to the user position can be grasped.

Although not shown in FIG. 2, it is also possible to provide a channel browsing processing unit for generating a channel signal or a thumbnail image corresponding to an external input signal. The channel browsing processing unit receives a stream signal TS output from the demodulation unit 220 or a stream signal output from the external device interface unit 230 and extracts an image from an input stream signal to generate a thumbnail image . The generated thumbnail image may be encoded as it is or may be input to the controller 270. In addition, the generated thumbnail image may be encoded in a stream format and input to the controller 270.

The control unit 270 may display a thumbnail list including a plurality of thumbnail images on the display unit 280 using the input thumbnail images. At this time, the thumbnail list may be displayed in a simple view mode displayed on a part of the screen in a state in which a predetermined image is displayed on the display unit 280, or in a full view mode displayed in most areas of the display unit 280 . The thumbnail images in the thumbnail list can be sequentially updated.

The display unit 280 converts a video signal, a data signal, an OSD signal, a control signal processed by the control unit 270 or a video signal, a data signal, a control signal and the like received from the external device interface unit 230, .

The display unit 280 may be a PDP, an LCD, an OLED, a flexible display, or the like. In particular, a three-dimensional display (3D display) may be possible according to an embodiment of the present invention.

The display unit 280 for three-dimensional image viewing can be divided into an additional display method and a single display method. The single display method can realize a 3D image by itself without a separate additional display, for example, a glass or the like, on the display unit 280 (non-spectacle 3D display), and examples thereof include a lenticular method, Various methods such as a parallax barrier may be applied. The additional display method can implement a 3D image using an additional display in addition to the display unit 280. For example, various methods such as a head mount display (HMD) type and a glasses type can be applied.

The glasses type can be further divided into a passive type such as a polarizing glasses type and an active type such as a shutter glass type. On the other hand, head-mounted display type can be divided into a passive type and an active type.

A 3D viewing apparatus (glass for 3D) 295 for viewing a stereoscopic image can include a passive polarizing glass or an active shutter glass, and is described as a concept including the above-described head mount type.

Meanwhile, the display unit 280 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 285 receives a signal processed by the control unit 270, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs it as a voice. The voice output unit 185 may be implemented by various types of speakers.

Meanwhile, in order to detect the user's gesture, a sensing unit (not shown) having at least one of a touch sensor, a voice sensor, a position sensor, and an operation sensor may be further included in the image display device 200 . A signal sensed by a sensing unit (not shown) is transmitted to the controller 170 through the user input interface unit 150.

The control unit 270 can detect the gesture of the user by combining the images captured from the photographing unit (not shown) or the sensed signals from the sensing unit (not shown).

The remote control device 260 transmits the user input to the user input interface unit 250. To this end, the remote control device 260 can use Bluetooth, RF (radio frequency) communication, infrared (IR) communication, UWB (Ultra Wideband), ZigBee, or the like. Also, the remote control device 260 can receive the video, audio, or data signal output from the user input interface unit 250 and display it or output it by the remote control device 260.

The image display apparatus 200 described above can be applied to digital broadcasting of ATSC system (7-VSB system), digital broadcasting of DVB-T system (COFDM system), digital broadcasting of ISDB-T system (BST-OFDM system) And a digital broadcasting receiver capable of receiving at least one of the digital broadcasting signals. In addition, as a portable type, digital terrestrial DMB broadcasting, satellite DMB broadcasting, ATSC-M / H broadcasting, DVB-H broadcasting (COFDM broadcasting), MediaFoward Link Only And a digital broadcasting receiver capable of receiving at least one of digital broadcasting and the like. It may also be a digital broadcast receiver for cable, satellite communications, or IPTV.

The video display device described herein may include a TV receiver, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) have.

The configuration of the image display apparatus 200 shown in FIG. 2 is a configuration diagram for embodiments of the present invention. Each component of the configuration diagram may be integrated, added, or omitted according to the specifications of the video display device 200 actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

The video signal decoded by the video display device 200 may be a 3D video signal of various formats. For example, a 3D image signal composed of a color image and a depth image, or a 3D image signal composed of a plurality of view-point image signals. The plurality of viewpoint image signals may include, for example, a left eye image signal and a right eye image signal. Here, the format of the 3D video signal is a side-by-side format in which the left-eye image signal L and the right-eye image signal R are arranged in left and right directions, a top- An interlaced format in which the left and right eye image signals and the right eye image signal are mixed line by line, a checker box for mixing the left eye image signal and the right eye image signal box by box, Format, and the like.

Also, the video display device described above can be applied to a mobile terminal. The mobile terminal may be a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC, tablet PCs, ultrabooks, and the like.

When a video display device is used as a mobile terminal, a wireless communication unit may be added.

The wireless communication unit may include one or more modules that enable wireless communication between the video display device 100 and the wireless communication system or between the mobile terminal and the network in which the mobile terminal is located. For example, the wireless communication unit may include at least one of a broadcast receiving module, a mobile communication module wireless Internet module, a short distance communication module and a location information module.

The broadcast receiving module 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 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (DVF-H), a Digital Video Broadcast- , Integrated Services Digital Broadcast-Terrestrial (ISDB-T), or the like. 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 may be stored in a memory.

The mobile communication module transmits and receives radio signals to and from 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 mobile communication module is configured to implement a video communication mode and a voice communication mode. The video call mode refers to a state of talking while viewing a video of the other party, and the voice call mode refers to a state in which a call is made without viewing the other party's video. In order to implement the video communication mode and the voice communication mode, the mobile communication module 112 is configured to transmit and receive at least one of voice and image.

The wireless Internet module refers to a module for wireless Internet access, and may be built in or enclosed in the mobile terminal 100. Examples of the wireless Internet technology include a wireless LAN (WLAN), a wireless fidelity (WiFi) direct, a DLNA (Digital Living Network Alliance), a Wibro (Wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA Can be used.

The short-range communication module is a module for short-range communication. As a short range communication technology, Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC) Direct or the like may be used.

The location information module is a module for acquiring the location of the mobile terminal, and representative examples thereof include a Global Position System (GPS) module or a Wireless Fidelity (WiFi) module.

Meanwhile, when the display unit and a sensor (hereinafter, referred to as a 'touch sensor') that detects a touch operation form a mutual layer structure (hereinafter referred to as a 'touch screen'), It can also be used as a 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 portion or a capacitance occurring in a specific portion of the display portion into an electrical input signal. The touch sensor can be configured to detect not only the position and area where the touch object is touched on the touch sensor but also the pressure at the time of touch. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

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 then transmits the corresponding data to the controller. Thus, the control unit can know which area of the display unit 151 is touched or the like.

The position detection unit 291 detects the position of the user through a head tracking technique and outputs the detected user position to the control unit 270. For example, the position detecting unit 291 can detect the position of the user by detecting and tracking the head of the user from the image photographed through the camera 293. [

The voice recognition unit 292 recognizes the user's voice and outputs the recognized user's voice to the control unit 270. [ The speech recognition unit 292 may include a microphone.

Hereinafter, a speech recognition apparatus and method capable of accurately recognizing a user's voice by changing a threshold value according to a user speech pattern will be described.

3 is a flowchart illustrating a speech recognition method according to an embodiment of the present invention.

First, the speech recognition unit 292 receives a user's voice according to user's utterance (S11).

The speech recognition unit 292 compares predetermined models that provide confidence scores representing the degree of similarity between the input speech and the plurality of speech models and the user speech input by the speech of the user, Recognizes the user's voice, and outputs the recognized result to the control unit 270 (S12). The recognized user voice includes a confidence score. For example, assuming that the user voice due to user utterance is channel up, channel down, volume up, etc., the channel up may have a 6252 confidence score, have channel 8242 confidence score, Can have a 2024 confidence score. Here, a method of recognizing a user's voice using the reliability score is disclosed in U.S. Patent No. 6,735,562.

The control unit 270 determines whether the recognized user voice corresponds to a reliability score higher than a threshold value and if the recognized user voice corresponds to a reliability score higher than a threshold value, It accpept.

On the other hand, if the recognized user voice corresponds to a reliability score lower than the threshold value, the control unit 270 rejects the recognized user voice signal and then transmits a preset guidance message (for example, Please re-induce speech recognition. For example, when the threshold value is 6000, the control unit 270 may set the channel up with the 6252 reliability score and the channel down with the 8242 confidence score to the user voice And rejects "volume up" having the 2024 reliability score without recognizing it as a user voice.

The controller 270 lists user voices corresponding to the threshold value or more in order of reliability score. For example, the control unit 270 may arrange the channels in the order of "channel down" having the 8242 reliability score and "channel up" having the 6252 reliability score.

The controller 270 may change the threshold value according to the user voice usage pattern (S13). Wherein the user-used voice pattern includes a usage rate of a first user's voice for controlling a channel and a volume of the video display device, a usage rate of a second user's voice for executing a web browser through the video display device, A rate of use of a third user's voice for executing an application program, and a rate of usage of a fourth user's voice for searching for a broadcast program of the video display device.

The control unit 270 may increase the probability of user speech recognition by changing the threshold value based on a pre-categorized user voice usage rate (user-used voice pattern) according to the function of the video display device 200. [ For example, the control unit 270 may include a first user voice (e.g., channel up, channel down, volume down, volume up, etc.) for controlling the channel and volume of the video display device 200, A second user voice (for example, the Internet, a web site, etc.) for executing a web browser through the video display device 200, various application programs (for example, a messenger, (For example, a messenger, a mail, and the like) for executing a program, a mail application, and the like), a fourth user voice for searching for a broadcast program of the video display device 200 Program name, etc.). The first to fourth user voices may be predefined or received from the server.

4 is a diagram illustrating an example of a voice pattern used by a user according to an embodiment of the present invention.

4, the usage rate of the first user's voice is 60% (4-1) of the whole (100%) and the usage rate of the second user's voice is 10% (4- 2), the use rate of the third user voice is 20% (4-3) of the whole (100%), and the usage rate of the fourth user voice is 10% (4-4) The controller 270 controls the voice recognition unit 292 to recognize the first user voice (for example, channel up, channel down, volume down, volume up, etc.) 6500 to increase the user speech recognition rate for phonetic similarities (e.g., channel up, channel down, volume down, volume up, etc.). The control unit 270 decreases the threshold value from 6000 to 5000 when the voice recognition unit 292 recognizes the fourth user voice (e.g., a drama name, an entertainment program name, etc.) Thereby enhancing the user voice recognition rate of the user voice. The usage rate of the first to fourth user's voice may be a usage rate of the voice that the user uses on average.

Accordingly, when the usage rate is high, such as the first user voice (for example, channel up, channel down, volume down, volume up, etc.) (For example, channel up, channel down, volume down, volume up, etc.) by increasing the threshold, since there is a high possibility that many channels exist, Increase recognition rate. The control unit 270 may generate a voice having a similar pronunciation (e.g., a drama name, an entertainment program name, etc.) if the usage rate is low, such as the fourth user voice (e.g., drama name, The threshold value is decreased to increase the user voice recognition rate for the fourth user voice. The controller 270 may increase the threshold value when a plurality of user sounds having similar sounds are recognized, thereby increasing the recognition probability of a plurality of user sounds having similar sounds.

The control unit 270 calculates the usage rate of each of the various user's voices by counting the number of times of use of the various user voices (the number of utterances) each time various user's voices are recognized, .

The controller 270 determines whether the recognized user voice corresponds to a reliability score higher than the changed threshold value (S14), and if the recognized user voice corresponds to a reliability score higher than the threshold value The user's voice is accepted (S15).

On the other hand, if the recognized user voice corresponds to a reliability score lower than the changed threshold value, the controller 270 rejects the recognized user voice signal (S16), and then transmits a preset guidance message , Please speak a little slowly) to re-induce speech recognition.

Therefore, the speech recognition apparatus and method according to the embodiment of the present invention can reduce a threshold value according to a user's voice pattern (a usage rate of each user's voice classified in advance according to functions of an electronic device such as a video display device or a mobile communication terminal) The user's voice can be accurately recognized.

5 is a flowchart illustrating a speech recognition method according to another embodiment of the present invention.

First, the speech recognition unit 292 receives a user's voice according to user's utterance (S21).

The speech recognition unit 292 compares predetermined models that provide confidence scores representing the degree of similarity between the input speech and the plurality of speech models and the user speech input by the speech of the user, Recognizes the user's voice, and outputs the recognized result to the control unit 270 (S22). The recognized user voice includes a confidence score. For example, assuming that the user voice due to user utterance is channel up, channel down, volume up, etc., the channel up may have a 6252 confidence score, have channel 8242 confidence score, Can have a 2024 confidence score.

The control unit 270 determines whether the recognized user voice corresponds to a reliability score higher than a threshold value and if the recognized user voice corresponds to a reliability score higher than a threshold value, It accpept.

On the other hand, if the recognized user voice corresponds to a reliability score lower than the threshold value, the control unit 270 rejects the recognized user voice signal and then transmits a preset guidance message (for example, Please re-induce speech recognition. For example, when the threshold value is 6000, the control unit 270 may set the channel up with the 6252 reliability score and the channel down with the 8242 confidence score to the user voice And rejects "volume up" having the 2024 reliability score without recognizing it as a user voice.

The controller 270 lists user voices corresponding to the threshold value or more in order of reliability score. For example, the control unit 270 may arrange the channels in the order of "channel down" having the 8242 reliability score and "channel up" having the 6252 reliability score.

The controller 270 may change the threshold value according to the usage pattern of the user (for example, the usage rate of each function of the electronic device such as the video display device, the mobile communication terminal, etc.) (S23). The usage pattern may include at least one of a usage rate of a first user use function for controlling a channel and a volume of the video display device, a usage rate of a second user use function for executing a web browser through the video display device, A usage rate of a third user use function for allowing an application program to run through the video display device, and a usage rate of a fourth user use function for searching for a broadcast program of the video display device.

The controller 270 can increase the probability of user speech recognition by changing the threshold value based on a categorized user use function pattern according to the function of the video display device 200. [ For example, the control unit 270 may include a first user using function (e.g., a channel up button, a channel down button, a volume down button, a volume up / down button) for controlling a channel and a volume of the video display device 200 A second user using function (e.g., Internet, web site, etc.) for executing a web browser through the video display device 200, and various application programs A third user use function (e.g., messenger, mail, etc.) for executing a broadcast program search function (e.g., a messenger, a mail application program, For example, search for a drama name, search for an entertainment program name, and the like). The first to fourth user use functions may be collected and defined according to each user.

FIG. 6 is a view illustrating an example of a user-using function pattern according to an embodiment of the present invention.

6, the usage rate of the first user use function is 60% (6-1) of the total (100%), the usage rate of the second user use function is 10% (100% 6-2), the usage rate of the third user use function is 20% (6-3) of the total (100%), the usage rate of the fourth user use function is 10% 4), when the first user using function (for example, a channel up button, a channel down button, a volume down button, a volume up button, etc.) is detected, the controller 270 sets the threshold value at 6000 6500 to increase the user speech recognition rate for phonetic similarities (e.g., channel up, channel down, volume down, volume up, etc.). The control unit 270 decreases the threshold value from 6000 to 5000 when the fourth user use function (e.g., drama name search, entertainment program name search, etc.) is detected, Increase the voice recognition rate. The usage rates of the first to fourth user use functions may be a usage rate of an average user or a usage rate of an average user use function. The control unit 270 receives the user use function pattern (the usage ratios of the first to fourth user use functions) to the server, receives a threshold value corresponding to the user use function pattern from the server, and receives the received threshold value You may.

Accordingly, the controller 270 can display a voice having a similar pronunciation (for example, a channel up button, a channel down button, a volume down button, a volume up button, (For example, channel up, channel down, volume down, volume up, etc.) by increasing the threshold value because there is a high possibility that many channels exist, ) Is increased. The control unit 270 may display a voice having a similar pronunciation (for example, a drama name, an entertainment program name, etc.) if the usage rate is low, such as the fourth user using function (for example, a drama name search, Etc.) is low, so that the threshold value is decreased to increase the user voice recognition rate for the fourth user use function. The controller 270 may increase the threshold value when a plurality of user sounds having similar sounds are recognized, thereby increasing the recognition probability of a plurality of user sounds having similar sounds.

The control unit 270 calculates the usage rate of each of the various user's voices by counting the number of times of use of the various user voices (the number of utterances) each time various user's voices are recognized, .

The controller 270 determines whether the recognized user voice corresponds to a reliability score higher than the changed threshold value (S14), and if the recognized user voice corresponds to a reliability score higher than the threshold value The user's voice is accepted (S15). The control unit 270 determines whether the recognized user voice corresponds to a reliability score higher than a threshold value received from the server, and if the recognized user voice has a reliability score higher than a threshold value received from the server And may accope the user's voice if it is.

On the other hand, if the recognized user voice corresponds to a reliability score lower than the changed threshold value, the controller 270 rejects the recognized user voice signal (S16), and then transmits a preset guidance message , Please speak a little slowly) to re-induce speech recognition. The control unit 270 rejects the recognized user voice signal if the recognized user voice corresponds to a reliability score lower than the threshold value received from the server, and then transmits a preset guidance message (for example, Please speak slowly) to re-induce speech recognition.

Therefore, the speech recognition apparatus and method according to another embodiment of the present invention can accurately determine the user's voice by changing the threshold value according to the pattern of the user's use function (the usage rate of each function of the electronic display device such as the video display device or the mobile communication terminal) Can be recognized.

As described above, the speech recognition apparatus and the method according to the embodiments of the present invention can be applied to a speech recognition apparatus, a speech recognition apparatus, a speech recognition apparatus, The user's voice can be correctly recognized by changing the threshold value.

The speech recognition apparatus and method according to embodiments of the present invention can recognize a user's voice accurately by changing a threshold value according to a function pattern of a user using function (a usage rate of each function of an electronic device such as a video display device or a mobile communication terminal) .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

270: control unit 292:

Claims (16)

A speech recognition unit for recognizing a user speech based on predetermined speech models providing reliability scores;
And a control unit for allowing or rejecting the recognized user voice based on the reliability score and the threshold of the recognized user voice, wherein the control unit changes the threshold value according to a user-used voice pattern. The apparatus of claim 1,
Wherein the threshold value is increased or decreased according to the user-used voice pattern. 3. The apparatus of claim 2,
And permits the recognized user voice if the reliability score of the recognized user voice is higher than the increased or decreased threshold value. 3. The apparatus of claim 2,
And rejects the recognized user voice if the reliability score of the recognized user voice is lower than the increased or decreased threshold value. 3. The apparatus of claim 2,
Wherein the threshold value is changed based on the user-used voice pattern classified in advance according to the function of the video display device. 6. The method of claim 5, wherein the pre-
A usage rate of a first user voice for controlling a channel and a volume of the video display device, a usage rate of a second user voice for executing a web browser through the video display device, The rate of use of the third user's voice, and the rate of use of the fourth user's voice for searching the broadcast program of the video display device. 7. The apparatus of claim 6,
And the user-used voice pattern is set in advance. 7. The apparatus of claim 6,
And the user-used voice pattern is received from the server. 7. The method of claim 6,
And the usage rate of the average user-used voice. The apparatus of claim 1,
And increases the recognition probability of a plurality of user voices having the similar pronunciation by increasing the threshold when a plurality of user voices having similar pronunciation are recognized. Recognizing the user speech based on predetermined speech models providing confidence scores;
Changing a threshold value according to a user-used voice pattern;
And allowing or rejecting the recognized user voice based on the reliability score of the recognized user voice and the threshold value. 12. The method of claim 11, wherein changing the threshold comprises:
And increasing or decreasing the threshold according to the user-used speech pattern. 13. The method of claim 12, wherein allowing the recognized user voice comprises:
And allowing the recognized user voice if the reliability score of the recognized user voice is higher than the increased or decreased threshold. 13. The method of claim 12, wherein rejecting the recognized user voice comprises:
And rejecting the recognized user voice if the reliability score of the recognized user voice is lower than the increased or decreased threshold. 13. The method of claim 12, wherein changing the threshold comprises:
And changing the threshold value based on the user-used voice pattern classified in advance according to the function of the video display device. 16. The method of claim 15, wherein the pre-
A usage rate of a first user voice for controlling a channel and a volume of the video display device, a usage rate of a second user voice for executing a web browser through the video display device, A usage rate of a third user voice, and a usage rate of a fourth user voice for searching a broadcast program of the video display device.

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