KR20050122417A - Television for authenticating user and method for controlling same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television for user authentication and a control method thereof. In particular, the television of the present invention receives a camera for photographing a user's face image, a driving unit for driving the camera, and a user's face image captured by the camera. An authentication system for performing authentication of whether the user is a registered user by comparing the extracted feature amount with the preset registration data, and outputting a broadcast program according to the authentication result of the authentication system, and operating a television unit by a key signal. Include. Therefore, the present invention can prevent deviation of the viewing grade restriction by using the face image information of the user as authentication information for viewing grade restriction.

Description

TELEVISION FOR AUTHENTICATING USER AND METHOD FOR CONTROLLING SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television and a control method thereof, and more particularly, to an authentication television and a control method capable of authenticating whether a user is registered by photographing a face image of a user with a camera.

Currently, personal biometric information is widely used in technical fields such as security. Biometric information for personal identification includes a personal characteristic amount for physical features such as a face, a gate, a fingerprint, an iris, a toenail, and a hair. The authentication system using the raw vegetable information distinguishes the registrant and the person to be identified by extracting the set individual unique feature amount and comparing the feature amount with the personal unique information previously stored.

In general, anyone can watch a video or audio output on a television screen by turning on the TV. For this reason, minors often watch video or audio such as adult or violent material that is undesirable for education. If the guardian is next to you, you can stop watching the channel by immediately turning off the television power key or changing the broadcast channel.

On the other hand, television receivers (eg terrestrial broadcasts, cable broadcasts, satellite broadcasts, etc.) include a parental control feature that can restrict viewing of a broadcast program, as in the technique of restricting a particular user's access to the Internet in an Internet set-top box. A typical broadcast program viewing restriction technique is, for example, a rating limiting technique for limiting viewing based on rating information classified for each broadcast program.

In the above-described rating limiting technique, when a user registers a separate password including rating information for restricting viewing of a broadcasting program on a per-user basis (eg, parents, minors, etc.) and logs in with the registered password, that is, when turning on the television. In order to enter a password or to broadcast a broadcasting program of a parental level, a viewer is selectively restricted from watching the classified programs in a manner that requires the viewer to enter a password.

Therefore, as described above, in the case of using the conventional rating limiting technique, a rating of a broadcast program that is allowed to be viewed by a viewer is checked by comparing a registered user password with an input password, and through this, the viewing of a broadcast program is selectively selected for each user. Because of this, it was possible to protect minors from harmful broadcasts (e.g., broadcasts of adult or explosives).

However, the conventional method of using a password is difficult to protect the minors from harmful broadcasts (for example, broadcasts of adult content, explosives, etc.) once the password is known.

An object of the present invention is to provide a user authentication television that can prevent the deviation of the viewing grade restriction by using the face image information of the user as the authentication information for viewing grade restriction in order to solve the problems of the prior art as described above. .

Another object of the present invention is to provide a control method of a user authentication television that can perform authentication by comparing face image information of a user and pre-registered data as authentication information for viewing grade restriction.

It is still another object of the present invention to compare a user's facial image information photographed with a camera and pre-registered data to perform authentication, and to control a user authentication television for guiding a preset personal service for an authenticated user. To provide.

In order to achieve the above object, the present invention provides a television, a camera for photographing a user's face image, a driving unit for driving the camera, a user's face image photographed by the camera, and a feature amount extracted to extract a feature amount and a preset feature amount. And a television system for outputting a broadcast program according to the authentication result of the authentication system and operating the drive unit by a key signal.

According to another aspect of the present invention, there is provided a method of controlling a television having a camera, including: driving a camera to photograph a user's face image; extracting a feature amount from the user's face image data; And comparing the registration data to perform authentication on whether the user is a registered user, and outputting a broadcast program when the authentication result is authenticated as the registered user.

According to another aspect of the present invention, there is provided a method of controlling a television having a camera, the method comprising: determining whether a key signal for selecting a preset service for a user is input; If the user is driving the camera to photograph the user's face image, extracting the feature amount from the user's face image data and comparing the extracted feature amount and the predetermined registration data to perform the authentication of the registered user, authentication result, If the user is authenticated as a registered user, the method includes outputting information on a service for each user.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram schematically showing the configuration of a user authentication television according to the present invention. Referring to FIG. 1, a television 1 for user authentication according to the present invention includes a camera 10, a driver 40, an authentication system 20, and a television (TV) system 30.

In the television 1 of the present invention, the camera 10 is for capturing a user's face image and uses an imaging device such as a charge coupled device (CCD) sensor. At this time, the camera 10 moves the lens position left, right, up, and down by the direction key signal. The lens focus is adjusted by zoom-in and zoom-out by a zoom key signal.

The driving unit 40 moves the camera 10 lens positions left, right, up, and down by the direction key switch of the television instrument panel or the direction key switch of the remote controller 60. Then, the camera 10 lens focus is zoomed in and zoomed out by the zoom key switch of the instrument panel or the remote controller.

The authentication system 20 receives a user facial image photographed by the camera 10, extracts a feature amount, compares the extracted feature amount with preset registration data, and performs authentication to determine whether the user is a registered user. The feature amount indicates vector information or the like for the user's face image.

The television system 30 has a configuration of a general analog or digital television and, when authenticated as a registered user according to the authentication result of the authentication system 20, performs a preset user-specific service guide. When the television system 30 is authenticated as a registered user, the television system 30 outputs a video and audio of a broadcast channel or a video and audio reproduced by a playback device 50 of an external recording medium. In addition, the television system 30 of the present invention controls the driving unit 40 to move the lens position of the camera 10 to the left, right, up, and down by the direction key of the instrument panel or the remote controller, and the camera 10 by the zoom key. The driver 40 is controlled to zoom in and zoom out the lens focus.

2A and 2B are diagrams illustrating an internal camera and an external camera installed in a television for user authentication according to the present invention. Unexplained reference numeral 50 denotes a playback device (for example, a DVD playback device, a VTR playback device, etc.) of an external recording medium connected to the television 1.

Referring to FIG. 2A, one embodiment of the camera 10 used in the present invention has a form in which the lens of the camera 10 is exposed to the outside of the front surface of the television 1 and the remaining part is embedded inside the television 1.

Referring to FIG. 2B, another type of camera 10 used in the present invention has an external type in which the camera 10 is installed on the upper side of the television 1.

The built-in or external camera 10 adjusts the lens position to the left, right, up and down by using the direction key 62 of the remote controller 60, or adjusts the lens focus to zoom in or zoom out by the zoom key 64. .

3 is a table showing registration data for user authentication in a television according to the present invention. Referring to FIG. 3, a registration number, a user name, an age, a presence or absence, a registration time, and other information are recorded in a table of registration data for user authentication.

4A to 4C are diagrams showing an example of positional movement of a camera installed in a television for user authentication according to the present invention.

Referring to FIG. 4A, the built-in camera 10 of the present invention moves the lens position to an intermediate position facing the front by the driver 40. Referring to FIG. 4B, the camera 10 moves the position of the lens to the lower position by the driving unit 40. Referring to FIG. 4C, the camera 10 moves the lens position to the upper position by the driving unit 40.

5 is a flowchart illustrating a process of moving a camera position in a television for user authentication according to the present invention. 4A to 4C and 5, the camera position shifting method according to the present invention proceeds as follows.

First, the microcomputer in the television system detects whether a key signal for controlling the camera is input from the instrument panel or the remote controller (S10).

As a result of the detection of S10, after the control key signal is input, it is determined whether the direction key signal is input in one of the left, right, up and down directions. That is, when the left direction key signal is input and the left direction key signal is input, the microcomputer operates the driving unit 40 to move the camera 10 lens to the left direction (S12 to S14) and determines whether the right direction key signal is input. When the right direction key signal is input, the microcomputer operates the driving unit 40 to move the camera 10 lens to the right direction. (S16 to S18) In addition, when the upper direction key signal is input by determining whether the upper direction key signal is input. The microcomputer operates the driving unit 40 to move the camera 10 lens upward. (S20 to S22) In addition, the microcomputer operates the driving unit 40 when the lower direction key signal is input by determining whether the lower direction key signal is input. The lens of the camera 10 is moved downward. (S24 to S26)

As a result of determination in S26, when the direction key signal of the left, right, upper, or lower part is not input, the microcomputer determines whether the zoom key signal of zoom in or zoom out is input, and when the zoom key signal is input, the microcomputer operates the driving unit 40. The focus of the lens of the camera 10 is adjusted to zoom in or zoom out (S28 to S30). However, if the zoom key signal is not input as a result of the determination of S30, the microcomputer returns to step S10.

6 is a block diagram showing a detailed configuration of a user authentication television according to an embodiment of the present invention. Referring to FIG. 6, a television for user authentication according to an embodiment of the present invention is largely composed of a camera 10, a driver 40, an authentication system 20, and a television (TV) system 30.

The authentication system 20 includes an image input unit 202 which receives a user's face image from the camera 10, a feature amount extracting unit 204 which extracts a feature amount from the image data of the image input unit 202, and a preset user. The registration database (DB) 206 storing the face image data of each star and the feature data of the feature extraction unit 204 and the data of the registration database 206 are compared with each other, and authentication is performed according to the comparison result. The authentication unit 208 is included.

The image input unit 202 receives a user's face image photographed from the camera 10 and converts an analog signal into a digital signal through an analog to digital control (ADC). The feature extractor 204 includes an area detector 204a for detecting a face image area from a digitized user face image, a feature point extractor 204b for extracting feature points from a face image area of the area detector 204a, and a feature point. And a feature amount generator 204c for generating a feature amount of the feature vector for the plurality of feature points of the extractor 204b.

The television system 30 has a tuner 302, an intermediate frequency amplifier 304, a demultiplexer 306, a microcomputer 308, a memory 310, and the like, similar to the configuration of a general analog or digital television. An OSD (On Screen Display) block 312, an audio signal processor 314, an image signal processor 316, a key input unit 319, and the like. Unexplained reference numeral 70 denotes a speaker and 72 denotes a television display screen.

The tuner 302 tunes a channel signal selected from high frequency signals of analog or digital broadcasting, cable broadcasting, or satellite broadcasting received through an antenna. The intermediate frequency amplifier 304 converts the tuned channel signal into an intermediate frequency to generate a composite video and audio signal. The demultiplexer 306 decodes the composite video and audio signals, and the audio signal processor 314 processes (decodes, amplifies, and decodes) the decoded video signal to the speaker 70. The video signal processor 316 may signal-process (filter, amplify, etc.) the decoded audio signal and transmit the decoded audio signal to the television display screen 72. The OSD block 312 delivers the OSD screen to the image signal processor 316 and is combined with the image screen of the image signal processor 316 to be output. The microcomputer 308 controls the entire television internal configuration, but controls the operation of the driver 40 of the camera 10, the television system 30, and the authentication system 20. The memory 310 stores data (or a program) of a preference channel, a fortune for each user, or a biorhythm for a preset service guide for each user. Reference numeral 318, which has not been described, is an external video / audio input unit which receives external video and audio data from a playback device (e.g., a DVD playback device, a VTR playback device, etc.) 50 of an external recording medium and transmits the external video and audio data to the demultiplexer 306. . In addition, the key input unit 319 is a part for receiving a key signal transmitted from a key switch of an instrument panel or a remote remote controller.

On the other hand, the user authentication television according to the present invention further installs an illumination 12 near the camera 10 so as to shine light on the subject when the user's face image is captured by the camera 10.

7 is a flowchart illustrating a process of registering facial image data for each user in the user authentication television according to the present invention. 6 and 7, a process of registering data in a television for user authentication according to the present invention is as follows.

When the registration key signal is input from the key input unit 319 while the television (TV) power switch is turned on, the microcomputer 308 operates the driving unit 40 to operate the camera 10 and the lighting 12. Turn on while supplying power. (S100 ~ S104)

The camera 10 captures a user's face image and receives the captured face image data into the image input unit 202 of the authentication system 20. Data transmitted to the image input unit 202 is converted into a digital signal via an ADC (S106).

The feature amount extracting unit 204 in the authentication system 20 first detects the face image area in the digitized user face image through the area detecting unit 204a. After the feature point is extracted from the face image area by the feature point extractor 204b, the feature amount generator 204c generates a feature amount of the feature vector for the plurality of feature points extracted by the feature point extractor 204b. (S108-S112)

The microcomputer 308 generates an OSD screen for inputting user information through the OSD block 312 (for example, “Please input user information”) and outputs it to the display screen 72 of the television through the image signal processor 316. do. When a user name, age, and the like are input from the key input unit 319, the microcomputer 308, together with the user information input to the authentication unit 20, features of the user extracted by the feature extraction unit 204 The quantity data is stored (registered) in the registration database 206. (S114 to S116) The user information stored in the registration database 206 may include a registration number, registration presence, and registration time.

8 is a flowchart illustrating a control method of a television for user authentication according to an embodiment of the present invention. 6 and 8, a control method of a user authentication television according to an embodiment of the present invention proceeds as follows.

When the television power switch is turned ON, the microcomputer 308 operates the driving unit 40 to turn on the power while supplying power to the camera 10 and the lighting 12. S122)

A user's face image is photographed through the camera 10, and the photographed face image data is input to the image input unit 202 of the authentication system 20 and converted into a digital signal. (S124)

The feature amount extracting unit 204 in the authentication system 20 extracts the feature amount from the user face image data through the area detecting unit 204a, the feature point extracting unit 204b, and the feature amount generating unit 204c. The authentication unit 208 in the authentication system 20 compares whether there is data equal to the feature amount extracted from the data registered in the registration database 206 (S126).

As a result of S126 comparison, if there is the same data, the authentication unit 208 transmits the registered user authentication result to the microcomputer 308. However, if there is no identical data, the authentication unit 208 transmits the registered user disauthentication result to the microcomputer 308 (S128).

As a result of S128 authentication, when authenticated as a registered user, the microcomputer 308 reads user-specific information (date of birth, preferred channel, gender, etc.) stored in the memory 310 (S130).

If the current mode of the television system 30 is the viewing mode of the broadcast program, the microcomputer 308 determines whether the viewing grade of the broadcast channel tuned by the tuner 302 is the viewing restriction broadcast of the corresponding user (S132). For example, when the authenticated user photographed by the camera 10 is 13 years old, it is determined whether the corresponding broadcasting channel is an adult viewing grade or an adult channel.

As a result of the determination of S132, when the viewing grade of the broadcast channel tuned by the tuner 302 is not the parental control broadcast of the corresponding user, the microcomputer 308 uses the intermediate frequency amplification unit 304 to tune the corresponding broadcast channel tuned by the tuner 302. Through the conversion to the intermediate frequency through the demultiplexer 306 to decode the video and audio signals of the broadcast channel. The image signal decoded by the voice signal processor 314 is processed (filtered, amplified, etc.) and transmitted to the speaker 70, and the signal signal is decoded by the image signal processor 316. Amplification, and the like, to be transmitted to the television display screen 72 to output the broadcast program of the channel allowed for viewing to the speaker 70 and the display screen 72 (S134).

On the other hand, if the rating of the broadcast channel tuned by the tuner 302 is the user's viewing restriction broadcast, the microcomputer 308 controls the demultiplexer 306 so as not to decode the video and audio signals of the broadcast channel. do. In addition, the microcomputer 308 generates an OSD screen (eg, “viewing limited broadcast. Turn to another channel”) of the guide message through the OSD block 312 and displays the display screen 72 of the television through the image signal processor 316. ) Therefore, only the OSD screen of the guide message is output to the speaker 70 and the display screen 72 of the television without outputting the broadcast program of the corresponding channel. (S136 to S138)

On the other hand, if the S128 authentication results in disapproving as a registered user, the microcomputer 308 generates the warning message text on the OSD screen through the OSD block 312 and then displays the display screen 72 of the television through the image signal processor 316. The OSD screen of the warning message is output (S140).

9 is a flowchart illustrating a control method of a user authentication television according to another embodiment of the present invention. 6 and 8, a control method of a user authentication television according to another embodiment of the present invention is an example of a process of performing user authentication while watching a channel broadcast, and proceeds as follows.

When the television system 30 is in the viewing mode of the broadcast program, the microcomputer 308 determines whether a channel selection key signal for changing to an arbitrary channel is input through the key input unit 319. (S150 to S152).

As a result of the determination in S152, when an arbitrary channel selection key signal is input, the microcomputer 308 determines whether the viewing grade of the broadcast channel tuned by the tuner 302 is a parental control broadcast (S154).

As a result of the determination in S154, when the viewing grade of the tuned broadcasting channel is the viewing restriction broadcasting, the microcomputer 308 operates the driving unit 40 to turn on while supplying power to the camera 10 and the lighting 12. S156)

A user's face image is photographed through the camera 10, and the photographed face image data is input to the image input unit 202 of the authentication system 20 and converted into a digital signal (S158).

The feature amount extracting unit 204 in the authentication system 20 extracts the feature amount from the user face image data through the area detecting unit 204a, the feature point extracting unit 204b, and the feature amount generating unit 204c. The authentication unit 208 in the authentication system 20 compares whether there is data equal to the feature amount extracted from the data registered in the registration database 206 (S160).

As a result of S160 comparison, when there is the same data, the authentication unit 208 transmits the registered user authentication result to the microcomputer 308. However, if there is no identical data, the authentication unit 208 transmits the registered user disauthentication result to the microcomputer 308 (S162).

As a result of authentication in S162, when authenticated as a registered user, the microcomputer 308 reads user-specific information (date of birth, preferred channel, gender, etc.) stored in the memory 310. (S164)

The microcomputer 308 determines whether the viewing grade of the broadcast channel tuned by the tuner 302 is a viewing restriction broadcast of the corresponding user. (S166) For example, an authenticated user captured by the camera 10 is 13 years old. In this case, it is determined whether the corresponding broadcasting channel is an adult viewing grade or an adult channel.

As a result of determination in S166, when the viewing grade of the broadcast channel tuned by the tuner 302 is not the user's viewing restriction broadcast, the microcomputer 308 uses the intermediate frequency amplifier 304 to tune the corresponding broadcast channel tuned by the tuner 302. Through the conversion to the intermediate frequency through the demultiplexer 306 to decode the video and audio signals of the broadcast channel. The image signal decoded by the voice signal processor 314 is processed (filtered, amplified, etc.) and transmitted to the speaker 70, and the signal signal is decoded by the image signal processor 316. Amplification, and the like, to be transmitted to the television display screen 72 to output the broadcast program of the channel allowed for viewing to the speaker 70 and the display screen 72. (S168)

On the other hand, if the viewing grade of the broadcast channel tuned by the tuner 302 is the user's viewing restriction broadcast as a result of S166, and the result of S128 authentication, the microcomputer 308 determines that the OSD block 312 is not authorized. Generates the warning message text through the OSD screen, and outputs the OSD screen of the warning message on the display screen 72 of the television through the image signal processor 316 (S170).

Meanwhile, in the above-described embodiments of the present invention and the other embodiments, the case in which the mode of the television system 30 is the viewing mode of the broadcast program has been described. However, when the mode of the television system 30 is the external input mode, the microcomputer 308 ) Controls the demultiplexer 306 to decode the external video and audio signals reproduced by the external recording medium reproducing apparatus 50 instead of the broadcast channel of the tuner 302 and decoded by user authentication using the above-described face image data. Limit the viewing of the video or output it as it is.

10 is a flowchart illustrating a control method of a user authentication television according to another embodiment of the present invention. Another embodiment of the present invention relates to a method for providing a preset user-specific service for a registered user through an authentication process based on user facial image data photographed by a camera of a television.

6 and 10, a control method of a user authentication television according to another embodiment of the present invention proceeds as follows.

When the television system 30 is in the viewing mode, the microcomputer 308 determines whether a selection key signal for a preset user-specific service (for example, a favorite channel, a fortune, a birhythm, etc.) is input through the key input unit 319. S180 to S182)

As a result of determination in S182, when a service selection key signal for each user is input, the microcomputer 308 operates the driving unit 40 to turn on while supplying power to the camera 10 and the lighting 12 (S184).

The user's face image is captured by the camera 10, and the photographed face image data is input to the image input unit 202 of the authentication system 20, and converted into a digital signal. (S186)

The feature amount extracting unit 204 in the authentication system 20 extracts the feature amount from the user face image data through the area detecting unit 204a, the feature point extracting unit 204b, and the feature amount generating unit 204c. The authentication unit 208 in the authentication system 20 compares whether there is data equal to the feature amount extracted from the data registered in the registration database 206. (S188)

As a result of S188 comparison, if there is the same data, the authentication unit 208 transmits the registered user authentication result to the microcomputer 308. However, if there is no identical data, the authentication unit 208 transmits the registered user disauthentication result to the microcomputer 308 (S190).

As a result of the authentication of S190, when authenticated as a registered user, the microcomputer 308 generates a menu for guiding the service for each user through the OSD block 312 as an OSD screen and uses the image processor 316 to display a television display screen 72. ) To be output (S200).

The microcomputer 308 determines whether a key signal for selecting one of the preset user-specific services (for example, a favorite channel, a fortune teller, or a rhythm) is input through the key input unit 319. (S202, S206, and S210). , S214)

As a result of the determination of S202, when the preferred channel key signal is input, the microcomputer 308 reads the preferred channel information of the registered user stored in the memory 310 and applies the same through the OSD block 312 and the image processor 316. The user's preferred channel information is output on the display screen 72 as an OSD screen (S204).

As a result of the determination of S206, when the fortune key signal is input, the microcomputer 308 executes the fortune program stored in the memory 310 based on the information on the registered user (date of birth, gender, etc.) and displays the executed fortune result of the user. It outputs to the television display screen 72 through the OSD block 312 and the image processing unit 316. (S208)

As a result of the determination of S210, when the biorhythm key signal is input, the microcomputer 308 executes the biorhythm program stored in the memory 310 based on the information (date of birth, etc.) of the registered user and the biorhythm result of the executed user. Is output to the television display screen 72 through the OSD block 312 and the image processing unit 316 (S212).

On the other hand, if a specific other key signal is input as a result of S214 determination, the microcomputer 308 transmits the selected user's service result based on the information on the registered user through the OSD block 312 and the image processor 316 (the TV display screen). 72) (S216).

The microcomputer 308 returns to step S202 when a key signal for selecting one of the preset user-specific services (for example, a favorite channel, a fortune, a rhythm, etc.) is not input through the key input unit 319.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

As described above, the present invention extracts a feature amount from a user's face image photographed by a camera and performs user authentication by comparing with preset registration data, thereby preventing deviation from the viewing grade restriction due to password exposure. It works.

In addition, the present invention can provide a better parental control technology to the user because after performing the user authentication based on the user facial image information can perform a user-specific service guide (preferred channel, fortune, biorhythm, etc.). .

In addition, the present invention can operate the camera installed in the television with a direction key or a zoom key, such as a remote control, it is possible to more accurately capture the user's face image than a fixed camera can increase the accuracy of user authentication.

1 is a block diagram briefly showing the configuration of a user authentication television according to the present invention;

2A and 2B are views illustrating an internal camera and an external camera installed in a television for user authentication according to the present invention;

3 is a table showing registration data for user authentication in a television according to the present invention;

4a to 4c are views showing an example of the positional movement of the camera installed in the user authentication television according to the present invention,

5 is a flowchart illustrating a process of moving a camera position in a television for user authentication according to the present invention;

6 is a block diagram showing a detailed configuration of a user authentication television according to an embodiment of the present invention;

7 is a flowchart illustrating a process of registering facial image data for each user in a television for user authentication according to the present invention;

8 is a flowchart illustrating a control method of a television for user authentication according to an embodiment of the present invention;

9 is a flowchart illustrating a control method of a user authentication television according to another embodiment of the present invention;

10A and 10B are flowcharts illustrating a control method of a television for user authentication according to still another embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: camera 20: authentication system

30: TV system 40: drive unit

50: external playback device 60: remote control transmitter

Claims (21)

As a television, A camera for photographing user facial images, A driving unit for driving the camera; An authentication system for receiving a user's face image photographed by the camera, extracting a feature amount, comparing the extracted feature amount with preset registration data, and performing authentication of a registered user; A television system for outputting a broadcast program in accordance with an authentication result of the authentication system and operating the drive unit by a key signal Television for user authentication comprising a. The method of claim 1, And the television system operates the drive unit to move the camera position left, right, up, and down by a direction key signal. The method of claim 1, And the television system operates the drive unit to adjust the lens focus to zoom out, the camera zooming in by a zoom key signal. The method of claim 1, The camera is a user authentication television, characterized in that built-in type installed inside the television, an external type or a separate external type installed outside the television. The method according to claim 1 or 4, And the television system stores a feature amount of the authentication system and user information of the feature amount in the registration database according to a registration key signal. The method of claim 1, The authentication system, An image input unit which receives the user's face image; A feature variable extracting unit for extracting a feature variable from the image data of the image input unit; A registration database storing preset user-specific facial image data; And an authentication unit for comparing the feature data of the feature variable extracting unit with the data of the registration database and authenticating the registered user according to the comparison result. The method of claim 6, The feature amount extraction unit, An area detector for detecting a face image area in the user face image; A feature point extraction unit for extracting feature points from the face image area of the area detection unit; And a feature variable generating unit for generating a feature variable of a feature vector for a plurality of feature points of the feature point extracting unit. The method of claim 1, And the broadcast program is a channel program of terrestrial broadcast, cable broadcast, or satellite broadcast. The method according to claim 1 or 8, And the television system restricts viewing of a preset broadcast channel among the broadcast programs according to an authentication result of the authentication system. The method of claim 1, And the television system outputs video and audio reproduced by an external recording medium reproducing apparatus instead of a broadcast program according to the authentication result of the authentication system. The method according to claim 1 or 10, And the television system outputs a warning message if it is not a registered user as a result of the authentication of the authentication system. The method of claim 1, And the television system guides a predetermined service for each user according to a corresponding user's request when the authentication result of the authentication system is a registered user. The method of claim 1, The predetermined user service is a user authentication television, characterized in that the preferred channel, fortune-telling, or biorhythm. As a control method of a television equipped with a camera, Photographing a user's face image by driving the camera; Extracting a feature amount from the user face image data, comparing the extracted feature amount with preset registration data, and performing authentication of a registered user; Outputting a broadcast program when authenticated as a registered user as a result of the authentication; Control method of a television for user authentication comprising a. The method of claim 14, The driving of the camera may include moving the camera lens position left, right, up and down, or adjusting the camera lens focus to zoom in. The method of claim 14, Extracting the feature amount, Detecting a face image area in the user face image; Extracting feature points from the face image area; And generating a feature amount of the feature vector for the extracted plurality of feature points. The method of claim 14, And limiting viewing of a preset broadcast channel based on the user information when the user is a registered user as a result of the authentication. The method of claim 14, The control method of the user authentication television, characterized in that for outputting the video and audio reproduced by the external recording medium replay device in place of the broadcast program when the authentication is a registered user. The method according to claim 14 or 18, And outputting a warning message if the user is not a registered user as a result of the authentication. As a control method of a television equipped with a camera, Determining whether a key signal for selecting a preset service for each user is input; Photographing a face image of a user by driving the camera when a selection key signal of the service for each user is input; Extracting a feature amount from the user face image data, comparing the extracted feature amount with preset registration data, and performing authentication of a registered user; Outputting information on the predetermined service for each user when authenticated as a registered user as a result of the authentication; Control method of a television for user authentication comprising a. The method of claim 20, The predetermined user-specific service is a control method of the user authentication television, characterized in that the preferred channel, fortune, or biorhythm.