KR20110004596A - Method for selecting function according to user detection result and broadcasting receiver enabling of the method - Google Patents

Abstract

PURPOSE: A method for selecting a function according to a user detection result and a broadcasting receiver using the method are provided to detect a face shape or motion of a user, thereby outputting a corresponding function of the broadcasting receiver through the detection result. CONSTITUTION: A broadcasting receiver receives a broadcasting signal. The broadcasting receiver decodes the broadcasting signal by video and audio signals. The broadcasting receiver outputs video and audio signals(S201). A camera of the broadcasting receiver photographs an image at a fixed cycle(S202). The broadcasting receiver detects a face shape or motion of a user from the photographed image. The broadcasting receiver selects a corresponding function through the detection result(S203). The broadcasting receiver controls the output of the function(S204).

Description

TECHNICAL FOR SELECTING FUNCTION ACCORDING TO USER DETECTION RESULT AND BROADCASTING RECEIVER ENABLING OF THE METHOD}

The present invention relates to a method of operating a broadcast receiver and a broadcast receiver employing the method. More particularly, after recognizing a user, the user selects a function to be applied to the broadcast receiver by detecting a user's face shape or a user's movement amount. The present invention relates to a method of operating a broadcast receiver for controlling the output of the broadcast receiver and a broadcast receiver employing the method.

Today, as digital broadcasting is becoming more common, digital broadcasting receivers are becoming essential consumer electronics. In addition, recently, digital broadcast receivers have been developed with hardware or software capable of performing various setting functions.

On the other hand, recently developed digital broadcasting receivers provide various convenient functions and usability to the user, but the user should be familiar with the interface or manual that provides the functions and select them directly from the digital broadcasting receiver to implement the functions. .

Therefore, users who are not good at operating digital broadcast receivers, who are not interested in manuals, or who do not take the time and effort to read manuals, cannot use the functions sufficiently even though they own digital broadcast receivers that provide various functions. There was a problem.

In addition, even users who are proficient in the operation of digital broadcasting receivers or are familiar with the manuals have to enter a corresponding interface or menu to select a function or input an on / off input to use various functions. There was a problem that could give.

Therefore, by solving the above problems of the prior art, by detecting the user's face shape or movement, by using the detection results by selecting the function applied to the broadcast receiver, various functions of the broadcast receiver automatically By setting and applying, there is an urgent need for a method of operating a broadcast receiver that can enhance user convenience and development of a broadcast receiver employing the method.

The present invention solves the problems of the prior art as described above, by detecting the user's face shape or movement, by selecting and outputting the function applied to the broadcast receiver using the detection result, various functions of the broadcast receiver automatically An object of the present invention is to provide a method of operating a broadcast receiver that can be set and applied, and a broadcast receiver employing the method.

In addition, the present invention provides a method and method for operating a broadcast receiver that can minimize the unnecessary waste of power by turning off the power or reducing the brightness or speaker output of the display screen when the user does not watch the broadcast receiver. Another object is to provide an adopted broadcast receiver.

In addition, the present invention provides a method and method for operating a broadcast receiver that can improve the user's convenience by outputting a warning message by determining the viewing distance between the user and the broadcast receiver, or by applying the brightness or clarity optimized for the viewing distance. Another object is to provide an adopted broadcast receiver.

The present invention also provides a method of operating a broadcast receiver capable of providing a channel or content suitable for a user's situation by automatically outputting recommended channel or content information by recognizing a facial expression of a user, and a broadcast receiver employing the method. Another purpose is to provide.

In addition, the present invention detects the amount of movement of the user to select a function to perform using the detection result to control the output, so that when the user is going to bed, unnecessary waste of power, when the user watches a sporting event Another object of the present invention is to provide a method of operating a broadcast receiver capable of automatically providing an optimized viewing environment and a broadcast receiver employing the method.

In accordance with an embodiment of the present invention, a method of operating a broadcast receiver for controlling output by recognizing a user may include receiving a video signal or an audio signal included in a broadcast signal, processing an image, and then outputting the video signal to a display screen. Outputting the audio signal to a speaker; Capturing an image at a predetermined cycle from a camera included in the broadcast receiver while outputting the broadcast signal, and detecting a face shape or a motion amount of a user from the captured image; And selecting a function to be applied to the broadcast receiver using a result of detecting the face shape or the motion amount of the user, and then controlling the output of the broadcast receiver.

In this case, in the operation method of the broadcast receiver, the controlling of the output of the broadcast receiver using the result of detecting the face shape of the user may include detecting the face shape of the user, If the face shape of the user is not detected, after the predetermined time elapses, turning off the broadcast receiver or reducing the brightness of the display screen or the speaker output.

The method of operating the broadcast receiver may further include controlling the output of the broadcast receiver using a result of detecting the face shape of the user, by using the result of detecting an edge of the face shape of the user. Calculating a viewing distance between a user and the broadcast receiver; If the viewing distance is less than a first threshold, outputting a warning message to the display screen or reducing the brightness of the display screen.

The method may further include outputting the video signal by applying an optimized sharpness or luminance to the viewing distance when the viewing distance is greater than or equal to the first threshold.

The method of operating the broadcast receiver may further include controlling the output of the broadcast receiver using a result of detecting the face shape of the user, by using the result of detecting an edge of the face shape of the user. Determining a facial expression of a user; And outputting a user interface recommending content or a broadcast channel of a category corresponding to the determined facial expression.

At this time, controlling the output of the broadcast receiver by using the result of detecting the motion amount of the user, if the detected motion amount is less than a second threshold, after a predetermined time elapses, power of the broadcast receiver is turned off. Off or reducing the brightness of the display screen or the speaker output.

In addition, when the detected motion amount is greater than or equal to the third threshold, the operating method of the broadcast receiver may determine the sport mode and output the video signal and the audio signal at the brightness and volume corresponding to the sport mode, or among the audio signals. The method may further include amplifying and outputting a predetermined frequency band corresponding to the sport mode.

In addition, the operating method of the broadcast receiver may further include sensing the illuminance in the optical sensor mounted on the broadcast receiver, and adjusting and outputting the luminance of the display screen according to the sensed illuminance.

In addition, the operating method of the broadcast receiver measures the noise in the noise measurement module mounted on the broadcast receiver, adjust the volume of the audio signal output from the speaker according to the measured noise, or a predetermined frequency of the audio signal The method may further include amplifying and outputting the band.

In addition, according to another embodiment of the present invention, a broadcast receiver for recognizing a user and controlling an output includes: a tuner configured to receive a broadcast signal; A decoder which decodes the broadcast signal into a video signal and an audio signal; A display unit configured to output the decoded video signal to a display screen; A speaker for outputting the decoded audio signal; A camera module for capturing an image at a predetermined cycle while outputting the broadcast signal; A detection module for detecting a shape or a movement amount of a user's face in the captured image; And a controller configured to control an output of the broadcast receiver by using a result of detecting the shape of the user's face or movement amount.

In this case, when the broadcast receiver detects the face shape of the user in the detection module, if the face shape of the user is not detected in the captured image, the control unit turns on the power of the broadcast receiver after a predetermined time elapses. Turn off or reduce the brightness of the display screen or the speaker output.

In this case, the control unit calculates a viewing distance between the user and the broadcast receiver using a result of detecting the edge of the shape of the face of the user, and when the viewing distance is less than a first threshold, the display. Outputting a warning message on the screen, or reducing the brightness of the display screen.

In this case, when the viewing distance is greater than or equal to the first threshold, the controller is configured to output the video signal by applying an optimized sharpness or luminance to the viewing distance.

In this case, if the detected movement amount is less than the second threshold, the controller may turn off the power of the broadcast receiver or decrease the brightness of the display screen or the speaker output after a predetermined time elapses.

At this time, if the detected motion amount is greater than or equal to the third threshold, the controller determines the sport mode and outputs the video signal and the audio signal at the brightness and volume corresponding to the sport mode, or the sport among the audio signals. And amplifying and outputting a predetermined frequency band corresponding to a mode.

In this case, the controller determines a facial expression of the user by using the result of detecting the edge of the face shape of the user, and recommends a content or broadcast channel of a category corresponding to the determined facial expression. And outputting an interface.

In this case, the broadcast receiver may further include an optical sensor mounted on the broadcast receiver to sense an illuminance, and the controller may adjust and output the brightness of the display screen according to the sensed illuminance. have.

The broadcast receiver may further include a noise measurement module mounted on the broadcast receiver to measure noise, and the controller may adjust the volume of the audio signal output from the speaker according to the measured noise, or the audio signal. It may be characterized by amplifying and outputting a predetermined frequency band.

The present invention has an effect of improving user convenience by detecting a face shape or movement of a user and selecting and outputting a function applied to a broadcast receiver using the detected result.

In addition, when the user does not watch the broadcast receiver, the broadcast receiver of the present invention has the effect of minimizing unnecessary power consumption by turning off the power or reducing the brightness or speaker output of the display screen.

In addition, the present invention has the effect of improving the user's convenience by outputting a warning message by determining the viewing distance between the user and the broadcast receiver, or by applying the luminance or sharpness optimized for the viewing distance.

In addition, the present invention has the effect of providing a channel or content in accordance with the user's situation by automatically outputting the recommended channel or content information by recognizing the facial expression of the user.

In addition, the present invention by detecting the amount of movement of the user to select the function to perform using the detection result to control the output, so that when the user goes to bed to prevent unnecessary power waste, the user sees a sporting event In this case, there is an effect of automatically providing an optimized viewing environment.

Hereinafter, a method for outputting a broadcast signal and a broadcast receiver employing the method will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a configuration of a broadcast receiver according to the present invention. Referring to FIG. 1, a broadcast receiver according to an embodiment of the present invention may include a camera module 101, an optical sensor 102, and a noise measurement module 103. 1 is a view showing an embodiment of an external configuration of a broadcast receiver, the internal configuration will be described in detail with reference to FIG.

The camera module 101 mounted in the broadcast receiver captures an image at a predetermined cycle while outputting the broadcast signal. The optical sensor 102 mounted on the broadcast receiver is mounted on the broadcast receiver to sense illuminance, and the noise measurement module 103 is mounted on the broadcast receiver to measure noise.

Hereinafter, a process of selecting a function using the image captured by the broadcast receiver of FIG. 1 and controlling the output will be described with reference to FIG. 2.

2 is a flowchart illustrating a process of controlling an output using an image captured by a broadcast receiver according to an embodiment of the present invention.

Referring to FIG. 2, according to an embodiment of the present invention, a method of operating a broadcast receiver for recognizing a user and controlling an output may include receiving a broadcast signal from a tuner and decoding it into a video and audio signal in step S201. The decoded video signal is output to a display screen, and the decoded audio signal is output to a speaker.

In this case, the broadcast receiver processes not only the broadcast signal received by the tuner but also a video / audio signal (hereinafter referred to as a broadcast signal) received from a network-connected external input device such as a set-top box, a PC, a DVD player, or a display screen. Can output to the speaker.

On the other hand, while the broadcast receiver outputs the broadcast signal in step S202, the camera captures an image at a predetermined period from a camera included in the broadcast receiver, and detects the shape or movement amount of the user's face in the captured image. do.

In this case, the face shape of the user may detect an edge where the face shape is located by detecting an edge of the user image, and then detect the face shape within the area where the face shape is located.

The image pattern for the face shape may be pre-stored in a predetermined memory, and the broadcast receiver detects an edge detected from the image photographed by the camera, compares it with the pattern image stored in the memory, and determines the face shape.

In addition, the broadcast receiver may store an image photographed at a predetermined cycle in a buffer, and then compare the images stored in the buffer to detect the amount of movement of the user. In this case, the broadcast receiver may measure the motion rate of the area determined as the user after edge detection on the image photographed by the camera.

The broadcast receiver selects a function to be applied to the broadcast receiver using the result of detecting the face shape or the movement amount of the user in step S203, and controls the output of the broadcast receiver to implement the function selected in step S204. do.

A specific embodiment of controlling the output by selecting a function to be applied by using the face shape or the movement amount of the user depressed in the broadcast receiver will be described below.

3 is a flowchart illustrating a process of controlling an output after selecting a function to be applied by detecting a face shape of a user in an image according to an embodiment of the present invention.

Referring to FIG. 3, in step S301, the broadcast receiver determines whether a face shape of a user is detected in a captured image. As a result of the determination in step S301, when the shape of the user's face is not detected in the captured image, after a predetermined time elapses in step S309, the broadcast receiver is turned off, the brightness of the display screen or the speaker Reduce the output

Therefore, when the user does not watch the broadcast receiver, the broadcast receiver of the present invention has an effect of minimizing unnecessary power consumption by turning off the power or reducing the brightness or speaker output of the display screen.

Meanwhile, as a result of the determination of step S301, the viewing distance between the user and the broadcast receiver is calculated using the result of detecting the edge of the shape of the face of the user in the captured image. For example, the broadcast receiver may check the lens focal length to the area determined as the shape of the user's face as a result of edge detection, and calculate the viewing distance between the user and the broadcast receiver by converting the lens focal length into the viewing distance.

In step S303, the broadcast receiver determines whether the calculated viewing distance is less than the first threshold, and if it is less than the first threshold, in step S304, outputs a warning message to the display screen, or displays the display screen. Reduce the brightness

For example, the broadcast receiver may output the user interface 501 shown in FIG. 5 to warn the user that the viewing distance is too close. 5 is a diagram illustrating an embodiment of a warning message output from a broadcast receiver according to the present invention.

As a result of the determination in step S303, when the viewing distance is greater than or equal to the first threshold, the video signal is output by applying the clarity or luminance optimized to the viewing distance. The sharpness or luminance condition optimized for each viewing distance may be recorded in the memory, and the broadcast receiver may search the memory to apply the optimized sharpness or luminance condition.

Therefore, the present invention has the effect of improving the user's convenience by outputting a warning message by determining the viewing distance between the user and the broadcast receiver, or by applying the luminance or the sharpness optimized for the viewing distance.

Meanwhile, in another embodiment, when the face shape is detected in step S301, the broadcast receiver uses the result of detecting the edge of the face shape of the user in step S307. Judge your expression. For example, the broadcast receiver may compare the edge detection result with the in-memory pattern and determine it as “laugh”, “anger”, “sorrow”.

Next, the broadcast receiver outputs a user interface recommending content or a broadcast channel of a category corresponding to the facial expression determined in step S307.

Accordingly, the present invention has an effect of providing a channel or content suitable for the user's situation by automatically outputting recommended channel or content information by recognizing a facial expression of the user.

4 is a flowchart illustrating an embodiment of selecting a function by detecting a motion amount of a user in the broadcast receiver of the present invention.

Referring to FIG. 4, the broadcast receiver according to an embodiment of the present invention detects the motion amount of the user in step S401, and determines whether the detected motion amount is less than the second threshold in step S402.

As a result of the determination in step S402, when the detected movement amount is less than the second threshold, it is determined as the sleep mode in step S403, and the power is turned off after a predetermined time, or the brightness of the display screen or the speaker output is decreased. Let's do it.

Meanwhile, the broadcast receiver determines whether the detected amount of motion is greater than or equal to the third threshold in step S404, and if it is greater than or equal to the third threshold, determines that it is a sport mode. Outputs a signal and an audio signal or amplifies a predetermined frequency band corresponding to the sport mode among the audio signals.

The second threshold and the third threshold may be variously set according to embodiments and may be selected by a user.

6 is a diagram illustrating an embodiment of controlling an output in a sleep mode or a sport mode. Referring to FIG. 6, when the detected movement amount is less than or equal to the second threshold, the broadcast receiver determines that the sleep mode 602 is to adjust the display screen to the corresponding brightness, and the volume corresponding to the sleep mode 602. Audio signal can be output.

In addition, when the detected amount of motion is greater than or equal to the third threshold, the broadcast receiver determines that the sports mode 601 is to adjust the display screen to the corresponding brightness 605 and outputs an audio signal at the corresponding volume. An audio signal of a specific frequency band (for example, a frequency band corresponding to speech) may be enlarged and output.

Therefore, the present invention detects the amount of movement of the user and selects a function to be performed using the detection result to control the output, thereby preventing unnecessary waste of power when the user goes to bed, and when the user watches a sporting event. There is an effect that can automatically provide an optimized viewing environment.

FIG. 7 is a diagram illustrating an embodiment of a memory for storing content or a broadcast channel of a category corresponding to a facial expression, according to an embodiment of the present invention.

Referring to FIG. 7, the broadcast receiver of the present invention designates a recommended category 702 according to a facial expression 701 of a user, and stores content or channel information 703 and 704 corresponding to each category.

When the facial expression of the user is detected, the broadcast receiver may search for a recommendation category corresponding to the user in the memory, and output content information or channel information corresponding to the searched category to the user interface.

For example, if the facial expression of the edge-detected user is 'laugh', the 'CH.' Category of the 'comedy' category. A user interface that recommends 26 comedy channels can be displayed.

8 is a diagram illustrating an embodiment of outputting a user interface for outputting recommended content or a channel according to a facial expression of a user according to the present invention.

Referring to FIG. 8, the broadcast receiver outputs a user interface 801 indicating that there is a recommended channel, and when a user inputs a selection, content or channel information of a category corresponding to the edge detected face expression of the user 802 )

For example, if the facial expression of the edge-detected user is 'laugh', the broadcast receiver may select 'CH.' In the 'comedy' category. 26 comedy channels 'and' CH. A user interface 802 recommending 40 M net 'can be output.

In addition, according to an embodiment, the broadcast receiver senses the illumination from the optical sensor mounted therein, and adjusts and outputs the brightness of the display screen according to the sensed illumination, thereby providing a display screen suitable for a viewing environment. have. For example, when the sensed illuminance is high, the broadcast receiver may set a high brightness of the display screen, and when the sensed illuminance is low, the broadcast receiver may set a low brightness of the display screen.

In addition, according to an embodiment, the broadcast receiver measures noise in the noise measuring module mounted therein, adjusts the volume of the audio signal output from the speaker according to the measured noise, or amplifies a predetermined frequency band among the audio signals. In this case, the sound volume can be provided in accordance with the viewing environment. For example, when the measured noise level is high, the broadcast receiver may set a high volume of the audio signal or amplify and output a frequency band corresponding to speech in the audio signal.

9 is a block diagram showing a broadcast receiver configuration according to an embodiment of the present invention. Referring to FIG. 9, a broadcast receiver includes a tuner 901, a demodulator 902, a demultiplexer 903, an audio / video decoder 904, a speaker 905, a display 906, and a user interface unit ( 907, the controller 908, the camera module 909, the detection module 910, the memory 911, the noise measurement module 912, and the optical sensor 913.

The tuner 901 tunes a channel to receive a broadcast signal.

The demodulator 902 demodulates the broadcast signal received by the tuner.

The demultiplexer 903 demultiplexes the audio signal and the video data from the broadcast signal demodulated by the demodulator 902. At this time, the demultiplexing of the audio data and the video data may be controlled by the controller 908. The demultiplexed audio data and video data are transmitted to the audio / video decoder 904.

The audio / video decoder 904 decodes the received data.

The display unit 906 outputs the decoded video signal, and the speaker 905 outputs the decoded audio signal.

The user interface 907 receives a command related to performing a function of a broadcast receiver from a user and transmits the command to the controller 908.

The controller 908 controls the overall function of the broadcast receiver and controls the decoded audio / video data to be output.

The camera module 909 captures an image at a predetermined cycle during the output of the broadcast signal.

The detection module 910 detects the shape or movement amount of the user's face in the captured image.

The controller 908 controls the output of the broadcast receiver by using a result of detecting a face shape or a motion amount of the user.

At this time, as a result of detecting the face shape of the user in the detection module 910, if the face shape of the user is not detected in the captured image, the control unit 908 after a predetermined time has elapsed. The power may be turned off, or the brightness of the display screen or the speaker output may be reduced.

In addition, the controller 908 calculates a viewing distance between the user and the broadcast receiver by using a result of detecting the edge of the face shape of the user, and when the viewing distance is less than a first threshold, A warning message may be output on the display screen or the brightness of the display screen may be reduced.

In addition, when the viewing distance is greater than or equal to the first threshold, the controller 908 may output the video signal by applying an optimized sharpness or luminance to the viewing distance.

The controller 908 may turn off the power of the broadcast receiver or decrease the brightness of the display screen or the speaker output after a predetermined time when the detected amount of movement is less than the second threshold.

In addition, if the detected motion amount is greater than or equal to the third threshold, the controller 908 determines the sport mode and outputs the video signal and the audio signal at the brightness and volume corresponding to the sport mode, or among the audio signals. A predetermined frequency band corresponding to a sport mode may be amplified and output.

In addition, the controller 908 determines the facial expression of the user by using the result of detecting the edge of the face shape of the user, and recommends a content or broadcast channel of a category corresponding to the determined facial expression. Output the user interface.

The optical sensor 913 is mounted on the broadcast receiver to sense illumination. In this case, the controller 908 may adjust and output the brightness of the display screen according to the sensed illuminance.

The noise measuring module 912 is mounted on the broadcast receiver to measure noise. In this case, the controller 908 may adjust the volume of the audio signal output from the speaker according to the measured noise, or may amplify and output a predetermined frequency band among the audio signals.

The broadcast receiver according to the present invention has been described so far, and the technical details described in the above embodiments may be applied to the broadcast receiver of FIG. 9, and thus the detailed description thereof will be omitted below.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

1 is a diagram illustrating a configuration of a broadcast receiver according to the present invention.

2 is a flowchart illustrating a process of controlling an output by using an image captured by a broadcast receiver according to an embodiment of the present invention.

3 is a flowchart illustrating a process of controlling an output after selecting a function to be applied by detecting a face shape of a user in an image according to an embodiment of the present invention.

4 is a flowchart illustrating an embodiment of selecting a function by detecting a motion amount of a user in the broadcast receiver of the present invention.

5 is a diagram illustrating an embodiment of a warning message output from a broadcast receiver according to the present invention.

6 illustrates an embodiment of controlling output in a sleep mode or a sport mode.

FIG. 7 illustrates an embodiment of a memory for storing content or broadcast channels of a category corresponding to a facial expression according to an embodiment of the present invention. FIG.

8 is an embodiment of outputting a user interface for outputting recommended content or a channel according to a facial expression of a user according to the present invention.

9 is a block diagram showing a broadcast receiver configuration according to an embodiment of the present invention.

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

901 tuner

902: demodulator

903: Demultiplexer

904: Audio / Video Decoder

905: speaker

906: display unit

907: the user interface unit

908: control unit

909: camera module

910: Detect Module

911: memory

912: noise measurement module

913: light sensor

Claims (18)

In the operating method of the broadcast receiver to recognize the user to control the output, Receiving and processing a video signal or an audio signal included in a broadcast signal, outputting the video signal to a display screen, and outputting the audio signal to a speaker; Capturing an image at a predetermined cycle from a camera included in the broadcast receiver while outputting the broadcast signal, and detecting a face shape or a motion amount of a user from the captured image; And And selecting a function to be applied to the broadcast receiver by using a result of detecting the face shape or the movement amount of the user, and then controlling the output of the broadcast receiver. The method of claim 1, Controlling the output of the broadcast receiver by using the result of detecting the shape of the face of the user, As a result of detecting the face shape of the user, if the face shape of the user is not detected in the captured image, after a predetermined time elapses, the broadcast receiver is turned off, or the brightness of the display screen or the speaker output is reduced. And operating the broadcast receiver. The method of claim 1, Controlling the output of the broadcast receiver by using the result of detecting the shape of the face of the user, Calculating a viewing distance between the user and the broadcast receiver using a result of detecting the edge of the face shape of the user; And Outputting a warning message on the display screen or reducing the brightness of the display screen when the viewing distance is less than a predetermined first threshold. The method of claim 3, And if the viewing distance is greater than or equal to the first threshold, outputting the video signal by applying an optimized sharpness or luminance to the viewing distance. The method of claim 1, Controlling the output of the broadcast receiver by using the result of detecting the shape of the face of the user, Determining a facial expression of the user by using a result of detecting the edge of the shape of the user's face; And And outputting a user interface for recommending a content or a broadcast channel of a category corresponding to the determined facial expression. The method of claim 1, Controlling the output of the broadcast receiver by using the result of detecting the motion amount of the user, If the detected movement amount is less than a second threshold, after a predetermined time elapses, turning off the broadcast receiver or reducing the brightness of the display screen or the speaker output. Way. The method of claim 1, Controlling the output of the broadcast receiver by using the result of detecting the motion amount of the user, If the detected amount of motion is equal to or greater than a third threshold, it is determined as a sport mode and outputs the video signal and an audio signal at a luminance and a volume corresponding to the sport mode, or a predetermined frequency corresponding to the sport mode among the audio signals. And amplifying the band and outputting the band. The method of claim 1, And sensing the illuminance by the optical sensor mounted on the broadcast receiver, and adjusting and outputting the luminance of the display screen according to the sensed illuminance. The method of claim 1, Measuring noise by the noise measuring module mounted in the broadcasting receiver, adjusting a volume of an audio signal output from the speaker according to the measured noise, or amplifying and outputting a predetermined frequency band among the audio signals Method of operation of a broadcast receiver comprising a. In the broadcast receiver to recognize the user to control the output, A tuner for receiving a broadcast signal; A decoder which decodes the broadcast signal into a video signal and an audio signal; A display unit configured to output the decoded video signal to a display screen; A speaker for outputting the decoded audio signal; A camera module for capturing an image at a predetermined cycle among outputs of the broadcast signal; A detection module for detecting a shape or a movement amount of a user's face in the captured image; And And a controller configured to control an output of the broadcast receiver by using a result of detecting the shape of the face or the movement amount of the user. The method of claim 10, As a result of detecting the face shape of the user in the detection module, if the face shape of the user is not detected in the captured image, the controller may turn off the power of the broadcast receiver or display the display after a predetermined time elapses. And reducing the brightness of the screen or the speaker output. The method of claim 10, The controller calculates a viewing distance between the user and the broadcast receiver using a result of detecting the edge of the face shape of the user, and warns the display screen when the viewing distance is less than a first threshold. And outputting a message or reducing the brightness of the display screen. The method of claim 12, The control unit, when the viewing distance is greater than or equal to the first threshold, the broadcast receiver, characterized in that for outputting the video signal by applying the clarity or brightness optimized to the viewing distance. The method of claim 10, The control unit, if the detected movement amount is less than the second threshold, after a predetermined time, the broadcast receiver is turned off, or the brightness of the display screen or the speaker output, characterized in that for reducing the speaker output. The method of claim 10, The controller may determine a sport mode and output the video signal and an audio signal at a brightness and a volume corresponding to the sport mode when the detected motion amount is greater than or equal to a third threshold, or correspond to the sport mode among the audio signals. And amplifying and outputting a predetermined frequency band. The method of claim 10, The controller determines a facial expression of the user by using the result of detecting the edge of the shape of the face of the user, and outputs a user interface for recommending a content or broadcast channel of a category corresponding to the determined facial expression. Broadcast receiver, characterized in that. The method of claim 10, Light sensor mounted on the broadcast receiver for sensing the illuminance More, The control unit, the broadcast receiver, characterized in that for adjusting the output brightness of the display screen in accordance with the sensed illuminance. The method of claim 10, A noise measuring module mounted on the broadcast receiver to measure noise; More, The control unit, characterized in that for adjusting the volume of the audio signal output from the speaker in accordance with the measured noise, or amplifying a predetermined frequency band of the audio signal and outputs.

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