KR20130010277A - Method for operating an apparatus for displaying image - Google Patents

Abstract

PURPOSE: An operation method of an image display device is provided to protect privacy of an image communication user and efficiently manage consumption power of the image display device. CONSTITUTION: An image display device enters an image communication mode(S710). The image display device displays a communication image in a part of display(S720). The image display device blocks a part of power among the whole area in the display or displays a screen saver image in a part of area in case that a sensed user location is diverged from a photographing area of a camera(S740,S750). [Reference numerals] (AA) Start; (BB) End; (S710) Entering an image communication mode; (S720) Displaying an image communication image; (S730) Sensing the location of a user; (S750) Displaying a SCREEN SAVER

Description

TECHNICAL FIELD [0001] The present invention relates to a method of operating an image display apparatus,

The present invention relates to a method of operating a video display device, and more particularly, to a method for efficiently managing power in a video display device having a video communication function.

The image display device is a device having a function of displaying an image that a user can watch. Also, the video display device can display a broadcast selected by the user among the broadcast signals transmitted from the broadcasting station on the display. Currently, the trend is shifting from analog broadcasting to digital broadcasting worldwide.

Such digital broadcasting transmits digital video and audio signals and provides a clear screen with high data resolution and low error rate compared to analog broadcasting, advantageous for error correction, and high resolution. In addition, with the implementation of digital broadcasting, interactive services have become possible.

In addition, as the functions of the image display apparatus are increasingly diversified, the image display apparatus may be provided with a video communication function that allows a user to communicate with each other while viewing images by transmitting images, voices, and data to each other.

Accordingly, an object of the present invention is to provide a video display device and a method of operating the same, which can protect a privacy of a video communication user and efficiently manage power consumption of the video display device.

According to an aspect of the present invention, there is provided a method of operating an image display apparatus, the method comprising: entering a video communication mode, displaying a video communication image on at least a portion of a display, and detecting a user's position And when the user's location is outside the photographing area of the camera, cutting off power of at least a part of the entire area of the display or displaying a screen saver image on the at least part of the area.

According to another aspect of the present invention, there is provided a method of operating an image display apparatus, the method comprising: entering a video communication mode, displaying a video communication image on at least a portion of a display, and storing previously stored image data. Transmitting to a communication counterpart through a network and cutting off power of at least a part of the entire area of the display or displaying a screen saver image on the at least part of the area.

According to the present invention, it is possible to protect the privacy of the video communication user and to efficiently manage the power consumption of the video display device.

1 and 2 are block diagrams of an image display apparatus according to an embodiment of the present invention;
3 is an internal block diagram of the controller of FIG. 1;
4 is a diagram illustrating a control method of a remote controller for controlling an image display device according to embodiments of the present invention;
5 is a block diagram of a remote control apparatus according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a screen displaying a screen of an image display apparatus according to an embodiment of the present invention; FIG.
7 is a flowchart provided to explain a method of operating an image display apparatus according to an embodiment of the present invention;
8 and 9 are views for explaining the operation method of the image display device according to an embodiment of the present invention;
10 and 11 are flowcharts provided to explain a method of operating an image display apparatus according to an exemplary embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

1 is a block diagram illustrating an image display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the image display apparatus 100 according to an exemplary embodiment of the present invention includes a tuner unit 110, a demodulator 120, an external device interface unit 130, a network interface unit 135, and a storage unit. 140, a user input interface unit 150, a sensor unit (not shown), a control unit 170, a display 180, an audio output unit 185, and an image communication unit 160 may be included.

The tuner unit 110 selects an RF broadcast signal corresponding to a channel selected by a user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna. Also, the selected RF broadcast signal is converted into an intermediate frequency signal, a baseband image, or a voice signal.

For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the selected RF broadcast signal is an analog broadcast signal, it is converted into an analog baseband image or voice signal (CVBS / SIF). That is, the tuner 110 may process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal CVBS / SIF output from the tuner 110 may be directly input to the controller 170.

In addition, the tuner unit 110 may receive a single broadcast RF broadcast signal according to an ATSC (Advanced Television System Committee) scheme or a multiple broadcast RF broadcast signal according to a digital video broadcasting (DVB) scheme.

Meanwhile, the tuner unit 110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among RF broadcast signals received through an antenna in the present invention, and converts them to intermediate frequency signals or baseband video or audio signals. Can be converted to

On the other hand, the tuner unit 110 may be provided with a plurality of tuners in order to receive broadcast signals of a plurality of channels. Alternatively, a single tuner may be used to receive broadcast signals of multiple channels simultaneously.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation.

For example, when the digital IF signal output from the tuner unit 110 is an ATSC scheme, the demodulator 120 performs 7-VSB (7-Vestigal Side Band) demodulation. Also, the demodulation unit 120 may perform channel decoding. To this end, the demodulator 120 includes a trellis decoder, a de-interleaver, and a reed solomon decoder to perform trellis decoding, deinterleaving, Solomon decoding can be performed.

For example, when the digital IF signal output from the tuner unit 110 is a DVB scheme, the demodulator 120 performs coded orthogonal frequency division modulation (COFDMA) demodulation. Also, the demodulation unit 120 may perform channel decoding. For this, the demodulator 120 may include a convolution decoder, a deinterleaver, and a reed-solomon decoder to perform convolutional decoding, deinterleaving, and reed solomon decoding.

The demodulation unit 120 may perform demodulation and channel decoding, and then output a stream signal TS. In this case, the stream signal may be a signal multiplexed with a video signal, an audio signal, or a data signal. For example, the stream signal may be an MPEG-2 TS (Transport Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

On the other hand, the demodulator 120 described above can be provided separately according to the ATSC system and the DVB system. That is, it can be provided as an ATSC demodulation unit and a DVB demodulation unit.

The stream signal output from the demodulator 120 may be input to the controller 170. After performing demultiplexing, image / audio signal processing, and the like, the controller 170 outputs an image to the display 180 and outputs audio to the audio output unit 185.

The external device interface unit 130 can transmit or receive data with the connected external device 190. [ To this end, the external device interface unit 130 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 130 may be connected to the external device 190 such as a digital versatile disk (DVD), a Blu-ray, a game device, a camera, a camcorder, a computer (laptop), or the like by wire or wireless. . The external device interface unit 130 transmits an image, audio, or data signal input from the outside through the connected external device 190 to the controller 170 of the image display apparatus 100. In addition, the controller 170 may output an image, audio, or data signal processed by the controller 170 to a connected external device. To this end, the external device interface unit 130 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The A / V input / output unit includes a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S-video terminal (analog), and a DVI so that video and audio signals of an external device can be input to the video display device 100. (Digital Visual Interface) terminal, HDMI (High Definition Multimedia Interface) terminal, RGB terminal, D-SUB terminal and the like.

The wireless communication unit can perform short-range wireless communication with other electronic devices. The image display apparatus 100 may communicate with Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and Digital Living Network Alliance (DLNA). Depending on the specification, it can be networked with other electronic devices.

In addition, the external device interface unit 130 may be connected through at least one of the various set top boxes and the various terminals described above to perform input / output operations with the set top box.

The network interface unit 135 provides an interface for connecting the image display apparatus 100 to a wired / wireless network including an internet network. The network interface unit 135 may include an Ethernet terminal for connection with a wired network, and for connection with a wireless network, a WLAN (Wi-Fi) or a Wibro (Wireless). Broadband, Wimax (World Interoperability for Microwave Access), High Speed Downlink Packet Access (HSDPA) communication standards, and the like may be used.

The network interface unit 135 may receive content or data provided by the Internet or a content provider or a network operator through a network. That is, it can receive contents and related information such as movies, advertisements, games, VOD, broadcasting signals, etc., provided from the Internet, a content provider, and the like 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 content provider or network operator.

In addition, the network interface unit 135 is connected to, for example, an Internet Protocol (IP) TV, and receives the video, audio, or data signals processed in the set-top box for the IPTV to enable bidirectional communication. The signal processed by the controller 170 may be transmitted to the set-top box for the IPTV.

Meanwhile, the above-described IPTV may mean ADSL-TV, VDSL-TV, FTTH-TV, etc. according to the type of transmission network, and include TV over DSL, Video over DSL, TV overIP (TVIP), and Broadband TV ( 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 140 may store a program for processing and controlling each signal in the controller 170, or may store a signal-processed video, audio, or data signal.

In addition, the storage unit 140 may perform a function for temporarily storing an image, audio, or data signal input to the external device interface unit 130. In addition, the storage 140 may store information on a predetermined broadcast channel through a channel storage function such as a channel map.

The storage unit 140 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), It may include at least one type of storage medium such as RAM, ROM (EEPROM, etc.). The image display apparatus 100 may reproduce and provide a file (video file, still image file, music file, document file, etc.) stored in the storage 140 to a user.

1 illustrates an embodiment in which the storage unit 140 is provided separately from the control unit 170, but the scope of the present invention is not limited thereto. The storage 140 may be included in the controller 170.

The user input interface unit 150 transmits a signal input by the user to the control unit 170 or a signal from the control unit 170 to the user.

For example, the user input interface unit 150 may be powered on / off, channel selection, and screen from the remote controller 200 according to various communication methods such as a radio frequency (RF) communication method and an infrared (IR) communication method. A user input signal such as a setting may be received, or a signal from the controller 170 may be transmitted to the remote controller 200.

In addition, for example, the user input interface unit 150 may transmit a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, and a set value to the controller 170.

The sensor unit (not shown) may detect a user's position, a user's gesture, or a touch. To this end, the sensor unit (not shown) may include a touch sensor, a voice sensor, a position sensor, an operation sensor, a gyro sensor, and the like.

The detected user's location, user's gesture, and touch signal may be input to the controller 170. Alternatively, unlike the drawing, it may be input to the controller 170 through the user input interface unit 150.

The controller 170 may demultiplex the input stream or process the demultiplexed signals through the tuner unit 110, the demodulator 120, or the external device interface unit 130. Signals can be generated and output.

The image signal processed by the controller 170 may be input to the display 180 and displayed as an image corresponding to the image signal. In addition, the image signal processed by the controller 170 may be input to the external output device through the external device interface unit 130.

The voice signal processed by the controller 170 may be sound output to the audio output unit 185. In addition, the voice signal processed by the controller 170 may be input to the external output device through the external device interface unit 130.

Although not shown in FIG. 1, the controller 170 may include a demultiplexer, an image processor, and the like. This will be described later with reference to FIG. 3.

In addition, the controller 170 may control overall operations of the image display apparatus 100. For example, the controller 170 may control the tuner 110 to control the tuner 110 to select an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

In addition, the controller 170 may control the image display apparatus 100 by a user command or an internal program input through the user input interface unit 150.

For example, the controller 170 controls the tuner 110 to input a signal of a channel selected according to a predetermined channel selection command received through the user input interface 150. Then, video, audio, or data signals of the selected channel are processed. The controller 170 may output the channel information selected by the user together with the processed video or audio signal through the display 180 or the audio output unit 185.

As another example, the controller 170 may output an external device 190, eg, a camera, input through the external device interface unit 130 according to an external device image playback command received through the user input interface unit 150. Alternatively, the video signal or the audio signal from the camcorder may be output through the display 180 or the audio output unit 185.

The controller 170 may control the display 180 to display an image. For example, the broadcast image input through the tuner unit 110, the external input image input through the external device interface unit 130, or the image input through the network interface unit 135 or stored in the storage unit 140. The image may be controlled to be displayed on the display 180.

In this case, the image displayed on the display 180 may be a still image or a video, and may be a 2D image or a 3D image.

The controller 170 may recognize the location of the user based on the image photographed by the camera 161. In addition, the distance (z-axis coordinate) between the user and the image display apparatus 100 may be determined. In addition, the x-axis coordinates and the y-axis coordinates in the display 180 corresponding to the user position may be determined.

Meanwhile, the controller 170 may perform signal processing to enable viewing of a corresponding video according to the viewing device.

On the other hand, although not shown in the figure, it may be further provided with a channel browsing processing unit for generating a thumbnail image corresponding to the channel signal or the external input signal. The channel browsing processor may receive a stream signal TS output from the demodulator 120 or a stream signal output from the external device interface 130, extract a video from the input stream signal, and generate a thumbnail image. Can be. The generated thumbnail image may be input as it is or encoded to the controller 170. In addition, the generated thumbnail image may be encoded in a stream form and input to the controller 170. The controller 170 may display a thumbnail list including a plurality of thumbnail images on the display 180 by using the input thumbnail image. In this case, the thumbnail list may be displayed in a simple viewing manner displayed in a partial region while a predetermined image is displayed on the display 180 or in an overall viewing manner displayed in most regions of the display 180. The thumbnail images in the thumbnail list can be sequentially updated.

The display 180 converts an image signal, a data signal, an OSD signal, a control signal, or an image signal, a data signal, a control signal received from the external device interface unit 130 processed by the controller 170, and generates a driving signal. Create

The display 180 may be a PDP, an LCD, an OLED, a flexible display, or a 3D display. In order to view the 3D image, the display 180 may be divided into an additional display method and a single display method.

The independent display method may implement a 3D image by the display 180 alone without additional display, for example, glasses, and the like, for example, a lenticular method, a parallax barrier, or the like. Various methods can be applied.

Meanwhile, the additional display method may implement a 3D image using a 3D viewing device (in addition to the display 180). For example, various methods such as a head mounted display (HMD) type and a glasses type may be applied.

The display 180 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 185 receives a signal processed by the controller 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs a voice signal. The voice output unit 185 may be implemented by various types of speakers.

The image communication unit 160 may include a camera 161 and a microphone 162.

The camera 161 may photograph the user. The camera 161 may be implemented by one camera, but is not limited thereto and may be implemented by a plurality of cameras. Meanwhile, the camera 161 may be disposed above the display 180. Image information photographed by the camera 161 is input to the controller 170.

The controller 170 may detect a location and a gesture of the user by combining or respectively combining an image captured by the camera 161 or a detected signal from a sensor unit (not shown).

The audio information collected by the microphone 162 is input to the controller 170.

On the other hand, the microphone 162 may be provided in the remote control device 200 according to the embodiment.

The controller 170 may control the user image based on the image information captured by the camera 161 to be displayed on the display 180.

In addition, the controller 170 may signal-process the image information captured by the camera 161 and the audio information collected by the microphone 162 and transmit the signal to the video communication counterpart device through the network interface unit 135.

The remote control apparatus 200 transmits the user input to the user input interface unit 150. To this end, the remote control apparatus 200 can use Bluetooth, RF (radio frequency) communication, infrared (IR) communication, UWB (Ultra Wideband), ZigBee, or the like. In addition, the remote control apparatus 200 may receive an image, an audio or a data signal output from the user input interface unit 150, and display or output the audio from the remote control apparatus 200.

The video display device 100 described above is a fixed type of ATSC (8-VSB) digital broadcasting, DVB-T (COFDM) digital broadcasting, ISDB-T (BST-OFDM) digital broadcasting, and the like. It may be a digital broadcast receiver capable of receiving at least one. In addition, as a mobile type, digital broadcasting of terrestrial DMB system, digital broadcasting of satellite DMB system, digital broadcasting of ATSC-M / H system, digital broadcasting of DVB-H system (COFDM system) and media flow link only system It may be a digital broadcast receiver capable of receiving at least one of digital broadcasts. It may also be a digital broadcast receiver for cable, satellite communications, or IPTV.

On the other hand, the image display device described in the present specification is a TV receiver, a projector, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable) Multimedia Player) may be included.

Meanwhile, a block diagram of the image display apparatus 100 shown in FIG. 1 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display apparatus 100 that is 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.

On the other hand, the image display apparatus 100 does not include the tuner 110 and the demodulator 120 shown in FIG. 1, unlike the illustrated in FIG. 1, but the network interface 130 or the external device interface unit ( Through 135, image content may be received and played back.

2 is an internal block diagram of an image display apparatus according to an embodiment of the present invention.

Hereinafter, the same contents as those described with reference to FIG. 1 will be omitted.

The external device interface unit 130 of the image display apparatus 100 may be connected to an external device, for example, the image communication module 190 by wire / wireless. The external device interface unit 130 transmits an image, audio, or data signal input from the outside through the connected image communication module 190 to the controller 170 of the image display device 100.

The image communication module 190 may include an interface unit 195, for example, a USB interface unit, which may transmit / receive data with the image display device.

In addition, the image communication module 190 may include a camera 191 for acquiring image data, a microphone 192 for acquiring audio data, and an analog-to-digital converter (ADC) for converting the audio data acquired from the microphone 192 into digital. 194, and a data processor 193 for encoding or decoding the input video and audio data.

In some embodiments, the data processor 193 may include a video encoder for encoding image data, an audio encoder for encoding or decoding audio data, an audio decoder, a data decoder for decoding received encoded data, or the like. Can be configured separately.

Meanwhile, although FIG. 2 discloses an embodiment in which the image communication module 190 including the camera 191 and the microphone 192 is connected to the image display apparatus 100, the present invention is not limited thereto.

For example, an independent external camera 191 and an external microphone 192 may be separately connected to the image display apparatus 100, and only one of the external camera 191 and the external microphone 192 may be connected to the image display apparatus 100. Connected to the other end, and the other part not connected may use a module provided in the image display apparatus 100. In this case, the processing of the video and audio data may be performed by the controller 170.

Meanwhile, referring to an example of a process of transmitting image data to an image communication counterpart in detail, an image is obtained from a camera 161 provided in the image display apparatus 100 or an external camera 191 connected to the image display apparatus 100. . The image data of the obtained image may be encoded in a predetermined format, for example, MPEG2, by the image decoder 325 of the controller 170 or the video encoder of the data processor 193.

The controller 170 may control the network interface 135 to transmit the encoded image data to a video communication counterpart through a network.

Meanwhile, the controller 170 may decode the encoded image data to control the display 180 to be displayed.

Meanwhile, referring to an example of a process of transmitting audio data to an image communication counterpart in detail, an audio signal is obtained by using a microphone 162 of the image display apparatus 100 or a microphone 192 connected to the image display apparatus 100. The obtained audio signal is converted into the I2S format by the ADC 194. The I2S format is a serial bus design for digital audio devices and technologies, including CD players, DSPs, and digital TV sound. In I2S designs, audio data is processed separately from the clock signal. Separating the data and clock signals eliminates the need for jitter-preventing devices because no errors related to jitter-inducing time occur.

Thereafter, the audio processor (not shown) or the data processor 193 in the controller 170 may encode and convert the signal converted into the I2S format into PCM (pulse code modulation) data, and the controller 170 The control unit may control the network interface unit 135 to transmit the encoded audio data to a video communication counterpart through a network.

The controller 170 may decode the encoded audio data and output the decoded audio data to the audio output unit 185.

Meanwhile, the video and audio data may be transmitted together with an enhanced window metafile.

3 is an internal block diagram of the controller of FIG. 1.

Referring to the drawings, the control unit 170 according to an embodiment of the present invention, the demultiplexer 310, the image processor 320, the OSD generator 340, the mixer 345, the frame rate converter 350, and a formatter 360. The audio processing unit (not shown) and the data processing unit (not shown) may be further included.

The demultiplexer 310 demultiplexes an input stream. For example, when an MPEG-2 TS is input, it may be demultiplexed and separated into video, audio, and data signals, respectively. The stream signal input to the demultiplexer 310 may be a stream signal output from the tuner 110 or the demodulator 120 or the external device interface 130.

The image processor 320 may perform image processing of the demultiplexed image signal. To this end, the image processor 320 may include an image decoder 225 and a scaler 235.

The image decoder 225 decodes the demultiplexed image signal, and the scaler 235 performs scaling to output the resolution of the decoded image signal on the display 180.

The video decoder 225 may include a decoder of various standards. For example, the image decoder 225 may include at least one of an MPEG-2 decoder, an H.264 decoder, an MPEC-C decoder (MPEC-C part 3), an MVC decoder, and an FTV decoder.

The image signal decoded by the image processor 320 may be a 3D image signal having various formats. For example, the image may be a 3D image signal including a color image and a depth image, or may be a 3D image signal including a plurality of view image signals. The plurality of viewpoint image signals may include, for example, a left eye image signal and a right eye image signal.

The OSD generator 340 generates an OSD signal according to a user input or itself. For example, a signal for displaying various types of information on a screen of the display 180 as a graphic or text may be generated based on a user input signal. The generated OSD signal may include various data such as a user interface screen, various menu screens, widgets, and icons of the image display apparatus 100. In addition, the generated OSD signal may include a 2D object or a 3D object.

The mixer 345 may mix the OSD signal generated by the OSD generator 340 and the decoded image signal processed by the image processor 320. The mixed video signal is provided to the frame rate converter 350.

The frame rate converter (FRC) 350 converts the frame rate of the input video. For example, a frame rate of 60 Hz is converted to 120 Hz or 240 Hz or 480 Hz. When converting a frame rate of 60 Hz to 120 Hz, it is possible to insert the same first frame or insert a third frame predicted from the first frame and the second frame between the first frame and the second frame. When converting a frame rate of 60 Hz to 240 Hz, it is possible to insert three more identical frames or three predicted frames. When converting a frame rate of 60 Hz to 480 Hz, it is possible to insert seven more identical frames or insert seven predicted frames.

The frame rate converter 350 may output the input frame rate as it is without additional frame rate conversion. Preferably, when the 2D video signal is input, the frame rate can be output as it is. On the other hand, when a 3D video signal is input, the frame rate can be varied as described above.

The formatter 360 may arrange the left eye image frame and the right eye image frame of the frame rate-converted 3D image. In addition, the synchronization signal Vsync for opening the left eye glass and the right eye glass of the 3D viewing apparatus 195 may be output.

The formatter 360 receives the mixed signal, i.e., the OSD signal and the decoded video signal, from the mixer 345, and separates the 2D video signal and the 3D video signal.

Meanwhile, the audio processing unit (not shown) in the control unit 170 can perform the audio processing of the demultiplexed audio signal. To this end, the audio processing unit (not shown) may include various decoders.

For example, if the demultiplexed speech signal is a coded speech signal, it can be decoded. Specifically, when the demultiplexed speech signal is an encoded speech signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder. In addition, when the demultiplexed speech signal is an encoded speech signal of MPEG 4 Bit Sliced Arithmetic Coding (BSAC) standard according to the terrestrial digital multimedia broadcasting (DMB) scheme, it may be decoded by an MPEG 4 decoder. In addition, when the demultiplexed speech signal is an encoded audio signal of the AAC (Advanced Audio Codec) standard of MPEG 2 according to the satellite DMB scheme or DVB-H, it may be decoded by the AAC decoder. In addition, when the demultiplexed speech signal is a encoded speech signal of the Dolby AC-3 standard, it may be decoded by the AC-3 decoder.

Also, the audio processor (not shown) in the controller 170 may process a base, a treble, a volume control, and the like.

The data processor (not shown) in the controller 170 may perform data processing of the demultiplexed data signal. For example, when the demultiplexed data signal is an encoded data signal, it may be decoded. The encoded data signal may be EPG (Electronic Progtam Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted in each channel. For example, the EPG information may be ATSC-PSIP (ATSC-Program and System Information Protocol) information in the case of the ATSC scheme, and may include DVB-Service Information (DVB-SI) in the case of the DVB scheme. . The ATSC-PSIP information or the DVB-SI information may be information included in the aforementioned stream, that is, the header (2 bytes) of the MPEG-2 TS.

In FIG. 3, the signals from the OSD generator 340 and the image processor 320 are mixed in the mixer 345 and then 3D processed in the formatter 360, but the present invention is not limited thereto. May be located after the formatter. That is, the output of the image processor 320 is 3D processed by the formatter 360, and the OSD generator 340 performs 3D processing together with OSD generation, and then mixes each processed 3D signal by the mixer 345. It is also possible.

Meanwhile, a block diagram of the controller 170 shown in FIG. 3 is a block diagram for one embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specification of the controller 170 that is actually implemented.

In particular, the frame rate converter 350 and the formatter 360 are not provided in the controller 170, but may be provided separately.

4 is a diagram illustrating a control method of a remote control apparatus for controlling an image display apparatus according to embodiments of the present invention.

As illustrated in FIG. 4A, a pointer 205 corresponding to the remote controller 200 is displayed on the display 180.

The user can move or rotate the remote control device 200 up and down, left and right (Fig. 4 (b)), front and rear (Fig. 4 (c)). The pointer 205 displayed on the display unit 180 of the image display device corresponds to the movement of the remote controller 200. The remote control apparatus 200 may be referred to as a spatial remote controller because the pointer 205 is moved and displayed according to the movement in the 3D space as shown in the figure.

4B illustrates that when the user moves the remote control apparatus 200 to the left side, the pointer 205 displayed on the display 180 of the image display apparatus also moves to the left side correspondingly.

Information about the movement of the remote control device 200 detected through the sensor of the remote control device 200 is transmitted to the image display device. The image display device may calculate the coordinates of the pointer 205 from the information about the movement of the remote controller 200. The image display device may display the pointer 205 to correspond to the calculated coordinates.

4C illustrates a case in which the user moves the remote control apparatus 200 away from the display 180 while pressing a specific button in the remote control apparatus 200. As a result, the selection area in the display 180 corresponding to the pointer 205 may be zoomed in and enlarged.

On the contrary, when the user moves the remote controller 200 to be closer to the display 180, the selection area in the display 180 corresponding to the pointer 205 may be zoomed out and reduced. On the other hand, when the remote control device 200 moves away from the display 180, the selection area is zoomed out, and when the remote control device 200 approaches the display 180, the selection area may be zoomed in.

On the other hand, while pressing a specific button in the remote control device 200 can recognize the up, down, left and right movement. That is, when the remote control device 200 moves away from or near the display 180, the up, down, left and right movements are not recognized, and only the front and back movements can be recognized. In a state where a specific button in the remote controller 200 is not pressed, only the pointer 205 moves according to the up, down, left, and right movements of the remote controller 200.

Meanwhile, the moving speed or the moving direction of the pointer 205 may correspond to the moving speed or the moving direction of the remote control apparatus 200.

The pointer in the present specification refers to an object displayed on the display 180 in response to the operation of the remote control apparatus 200. Thus, the pointer 205 may be an object of various shapes in addition to the arrow shape shown in the drawing. For example, the concept may include a point, a cursor, a prompt, a thick outline, and the like. In addition, the pointer 205 may be displayed corresponding to any one of the horizontal axis and the vertical axis of the display 180, and may be displayed corresponding to a plurality of points such as a line and a surface. .

5 is an internal block diagram of an interface unit 150 of a remote control apparatus, a space remote control 201 and an image display apparatus 100 according to an embodiment of the present invention.

As shown, the spatial remote control 201, the wireless communication unit 220, the user input unit 230, sensor unit 240, output unit 250, power supply unit 260, storage unit 270, and the control unit And 280.

The wireless communication unit 220 transmits and receives a signal with the image display device 100. In the present exemplary embodiment, the spatial remote controller 201 may include an RF module 221 capable of transmitting and receiving a signal with the interface unit 150 of the image display apparatus 100 according to an RF communication standard. In addition, the spatial remote controller 201 may include an IR module 223 capable of transmitting and receiving signals with the interface unit 150 of the image display apparatus 100 according to an IR communication standard.

In the present embodiment, the spatial remote control 201 transmits a signal containing information on the operation of the spatial remote control 201 to the image display apparatus 100 through the RF module 221. In addition, the spatial remote controller 201 may receive a signal transmitted from the image display apparatus 100 through the RF module 221. In addition, the spatial remote controller 201 may transmit a command regarding power on / off, channel change, volume change, etc. to the image display device 100 through the IR module 223 as necessary.

The user input unit 230 may be configured as a keypad or a button. The user may input a command related to the image display apparatus 100 to the spatial remote controller 201 by manipulating the user input unit 230. When the user input unit 230 includes a hard key button, the user may input a command related to the image display apparatus 100 to the spatial remote control 201 through a push operation of the hard key button. When the user input unit 230 includes a touch screen, the user may input a command related to the image display apparatus 100 to the spatial remote control 201 by touching a soft key of the touch screen. In addition, the user input unit 230 may include various kinds of input means that a user can operate, such as a scroll key or a jog key, and the present embodiment does not limit the scope of the present invention.

The sensor unit 240 may include a gyro sensor 241 or an acceleration sensor 243. The gyro sensor 241 may sense information about the operation of the spatial remote control 201. For example, the gyro sensor 241 may sense information about the operation of the spatial remote controller 201 based on the x, y, and z axes. The acceleration sensor 243 may sense information about a moving speed of the spatial remote control 201.

The output unit 250 may output an image or audio signal corresponding to the manipulation of the user input unit 230 or corresponding to the signal transmitted from the image display apparatus 100. The user may recognize whether the user input unit 230 is manipulated or whether the image display apparatus 100 is controlled through the output unit 250.

For example, the output unit 250 may include a LED module 251 that is turned on when the user input unit 230 is manipulated or a signal is transmitted and received with the image display device 100 through the wireless communication unit 220, and a vibration module generating vibration. 253, a sound output module 255 for outputting sound, or a display module 257 for outputting an image.

The power supply unit 260 supplies power to the space remote control 201. The power supply unit 260 may reduce power waste by stopping power supply when the space remote control 201 does not move for a predetermined time. The power supply unit 260 may resume power supply when a predetermined key provided in the space remote control 201 is operated.

The storage unit 270 may store various types of programs, application data, and the like required for controlling or operating the spatial remote controller 201. If the spatial remote control 201 wirelessly transmits and receives a signal through the image display apparatus 100 and the RF module 221, the spatial remote control 201 and the image display apparatus 100 transmit and receive signals through a predetermined frequency band. . The control unit 280 of the spatial remote control unit 201 stores and refers to information on a frequency band for transmitting and receiving a signal wirelessly with the image display apparatus 100 paired with the spatial remote control unit 201 in the storage unit 270. Can be.

The controller 280 controls various items related to the control of the spatial remote controller 201. The controller 280 transmits a signal corresponding to a predetermined key manipulation of the user input unit 230 or a signal corresponding to an operation of the spatial remote controller 201 sensed by the sensor unit 240 through the wireless communication unit 220. 100 may be transmitted to the interface unit 150.

The interface unit 150 of the image display apparatus 100 calculates coordinate values of a wireless communication unit 151 capable of transmitting and receiving signals to and from the spatial remote controller 201 and a pointer corresponding to the operation of the spatial remote controller 210. A coordinate value calculator 154 can be provided.

The interface unit 150 may transmit and receive a signal wirelessly with the spatial remote controller 201 through the RF module 152. In addition, through the IR module 153, the spatial remote control unit 201 may receive a signal transmitted according to the IR communication standard.

The coordinate value calculator 154 corrects a hand shake or an error from a signal corresponding to an operation of the spatial remote controller 201 received through the wireless communication unit 151 to display the coordinate value of the pointer 202 to be displayed on the display 170. x, y) can be calculated.

The spatial remote control 201 transmission signal input to the image display apparatus 100 through the interface unit 150 is transmitted to the controller 180 of the image display apparatus 100. The controller 180 may determine the information on the operation and the key operation of the spatial remote control 201 from the signal transmitted from the spatial remote control 201 and control the image display apparatus 100 accordingly.

As another example, the spatial remote controller 201 may calculate a pointer coordinate value corresponding to the operation of the spatial remote controller and output the pointer coordinate value to the interface unit 150 of the image display apparatus 100. In this case, the interface unit 150 of the image display apparatus 100 may transmit the information about the received pointer coordinate value to the controller 180 without a separate camera shake or error correction process.

1 to 5 is a block diagram of the spatial remote control 201 of the image display apparatus 100 and the remote control apparatus 200 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display apparatus 100 and the spatial remote control 201 that are 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.

6 is a diagram illustrating a screen on which a screen of an image display device according to an embodiment of the present invention is displayed. In more detail, various configuration examples of the video communication video screen are shown.

As shown in FIG. 6 (a), in a one-to-one video communication, a video display device user and a video communication counterpart perform video conversation or video conference while transmitting and receiving video and audio data according to video communication between each other. Here, the one-to-one video communication does not mean only one and one-to-one conversation. As shown in FIG. 6 (a), the user video screen 410 and the counterpart video screen 420 may include a plurality of people according to the video communication participants. Can be.

In addition, the video communication function includes not only one-to-one and one-to-many conversations, but also a video conferencing system through a network that allows conferences to be smoothly carried out remotely by real-time transmission of video and audio of meeting participants located in different regions. do. In general, a video conferencing system refers to a service that allows a multi-party remotely to exchange various information such as video and voice on a network in an interactive manner.

Meanwhile, in the present invention, the video communication image may be at least one of the user video screen 410 and the counterpart video screen 420.

6 (b) is different from FIG. 6 (a) in which the user 410 and the counterpart 420 are displayed in the same area, the counterpart screen 430 is displayed as the main screen, and the user screen 440 is PIP (picture). An example of the display in the form of a picture is shown. In addition, the user's own video screen 440 may be omitted.

FIG. 6 (c) illustrates an example of a multi-party or multi-point video communication image. According to an embodiment of the present invention, as shown in FIG. 6 (c), the main screen 450 and the plurality of participant screens 460, The screen may be divided and displayed at 470 and 480.

When the video display device of the user or the video communication participant configures a screen for video communication, the video display device transmits its own video data to the other party, and the controller of the received video display device controls to display the received video data on the screen. Can be.

Meanwhile, although FIG. 6 illustrates screens photographed or image-processed by a participant's camera as a video communication image, it is also possible to display a still image or conference data of a video on at least a portion of the display.

It is also possible to display an image based on other image data transmitted by the participants.

7 is a flowchart provided to explain a method of operating an image display device according to an embodiment of the present invention, and FIGS. 8 and 9 are referred to a description of a method of operating an image display device according to an embodiment of the present invention. It is a drawing.

First, the operation method of the image display apparatus according to an embodiment of the present invention enters the video communication mode by a user's command or a request of a video communication counterpart (S710) or driving of a program associated with reservation setting or video communication. Also, the video communication mode can be entered.

As the video communication mode is entered, video communication images 821 and 822 are displayed on at least a portion of the display 180 (S720).

As described above with reference to FIG. 6, the video communication image may include at least one of a transmitting user image and a receiving counterpart image.

The user image may be an image captured by the camera 161 or an image stored in the storage unit. That is, in addition to the image captured by the camera 161 during video communication, the stored replacement image may be displayed on the display 180 and transmitted to the video communication counterpart.

On the other hand, the image display device 100 according to the present invention detects the user's position while using the video communication (S730) and determines whether the detected user's position is outside the photographing area 810 of the camera (S740).

Here, the position detection of the user may be detected by the position sensor 850 or the camera 161 of the infrared (IR) type.

In the position detection by the camera 161, a face recognition algorithm may be used for more accurate detection.

Face recognition algorithms have been published since the 1970s, and a wide variety of solutions are now widely used. For example, it is used in door control systems, security systems, real-time surveillance systems, video conferencing, user authentication, file encryption, and distance learning.

Therefore, various techniques are disclosed for face recognition, and various face recognition algorithms proposed in the present invention can be used in the present invention. A method of detecting geometric human feature elements, a method of detecting edge information and determining surrounding data to recognize a face, and the like may also be used.

For example, if a fast recognition speed is required, face recognition technology using geometric features of the face may be used. This technique is one of the most commonly used methods among various face recognition techniques. This technique uses geometric factors, such as the location, size, and distance between facial feature points, such as eyes, nose, and mouth, to recognize each individual's face. Here, the geometrical features as described above may be included in elements that remain when the resolution of the input image is lowered.

8 illustrates an embodiment in which the image display device 100 includes an infrared sensor 850 and a camera 161, but the present invention is not limited thereto.

For example, the image display apparatus 100 according to an embodiment of the present invention may include a camera 161 without a sensor to detect a user's position, and may be connected to an external camera or sensor to detect a user's position. You may. In addition, the positions of the infrared sensor 850 and the camera 161 in FIG. 8 are merely exemplary positions.

On the other hand, when the detected user's location is located within the camera's shooting area 810, the image communication mode is maintained.

However, when the user's location is out of the photographing area of the camera, at least a part of the entire area of the display 180 is cut off or a screen saver image is displayed on at least part of the area (S750).

The screen saver image is a kind of switching mode in which a still image, an image, an animation, or a moving image is repeatedly displayed by displaying a still image, an image, an animation, or a moving image on a screen when not using all or part of the display unit for a predetermined time. The screen saver image may be a still image or a moving image.

In addition, screen saver images can darken the screen, display continuously changing graphic images, or automatically change still images at certain times, making them appear as if they are moving. Accordingly, the screen saver image may be variously configured according to the user's preference, and thus may provide enjoyment to the user as well as a power consumption reduction effect.

In video communication using a video display device, a user must be in front of the video display device to have a video communication meaning. Even when the user is not in front of the VCS camera, if the user maintains the existing screen, it may cause an afterimage of the screen and an increase in power consumption when the fixed screen is maintained.

Therefore, when the user leaves the photographing area of the camera during video communication, unnecessary power consumption may be reduced by turning off the screen or displaying a screen saver image. In addition, afterimage of the image display device may be minimized.

FIG. 9A illustrates an example of displaying a screen saver image 910 on the entire area of the display 180, and FIG. 9B illustrates a user in the entire area of the display 180. Referring to FIG. An example of displaying a screen saver image in an area 921 where an image is displayed, and continuously displaying an image of a video communication counterpart in the remaining area 922.

Meanwhile, while displaying a screen saver image, the previously stored image data may be transmitted to a video communication counterpart through a network.

The pre-stored image data may be image data including a message indicating a user absence or image data to be displayed on the screen of the user's absence counterpart.

Subsequently, the operating method of the image display apparatus according to the present invention may further include re-entering the video communication mode when the user is located again in the photographing area of the camera.

According to the present invention, the sensor unit (not shown) may detect a user's position or a user's gesture or touch. To this end, the sensor unit (not shown) may include a touch sensor, a voice sensor, a position sensor, a motion sensor, a gyro sensor, and the like.

The detected user's location, user's gesture, and touch signal may be input to the controller 170. Alternatively, unlike the drawing, it may be input to the controller 170 through the user input interface unit 150.

10 and 11 are flowcharts provided to explain a method of operating an image display apparatus according to an exemplary embodiment of the present invention.

On the other hand, not only detecting the location information of the user, but may further include the step of detecting the user's movement (S1010), in this case, the user is away from the image display device more than a predetermined distance (d) In this case (S1020) it may output a warning sound (S1030).

Also in this case, when the user's movement and / or position is sensed (S1054), when the user is located again in the photographing area of the camera, the user may reenter the video communication mode (S1050).

If the user is outside the photographing area of the camera, power of at least a part of the entire area of the display 180 may be cut off or a screen saver image may be displayed on at least part of the area (S1060).

Meanwhile, the present invention may use user's motion information instead of the user's location information.

According to another aspect of the present invention, a method of operating an image display apparatus enters a video communication mode, and the video communication image is displayed on at least a portion of the display (S1020). The method may include transmitting through a network, cutting off power of at least a part of the entire area of the display, or displaying a screen saver image on at least a part of the area.

That is, the operation method of the image display apparatus described with reference to the flowchart of FIG. 10 may be performed at the stage after the operation method of FIG. 8 and may also operate independently.

Referring to FIG. 11, in a method of operating an image display apparatus according to another exemplary embodiment, the method may include entering an image communication mode (S1110), displaying an image communication image on at least a portion of the display (S1120). Transmitting previously stored image data to a video communication counterpart through a network (S1130) and cutting off power of at least a part of the entire area of the display or displaying a screen saver image on at least a part of the area (S1140) It may include.

That is, it is possible to apply a power saving function to the display 180 of the user side while transmitting a predetermined video such as a movie, a moving picture, a substitute video, etc. to the video communication counterpart and watching the received video.

The previously stored image data may be data stored in the storage 140 of the image display apparatus 100 or data stored in an external storage device connected to the image display apparatus 100, for example, a USB memory.

On the other hand, the transmission of the pre-stored image data may be performed when there is a user's transmission command or when the user leaves the photographing area of the camera.

If there is no user in the shooting area of the camera, unnecessary images are transmitted to the other party. Therefore, when the user is away for a while or needs other work, the user may transmit a pre-stored replacement image.

Therefore, it may help to protect the privacy of the user.

In addition, when the user is away from the video communication counterpart, the video communication counterpart can recognize the absence of the user and wait without boredom while using the predetermined content.

In addition, the video communication user and the other party may use the same content together.

On the other hand, in this case, when the user inputs a command related to the image communication or returns to the photographing area of the camera, the user can enter the image communication mode again and transmit the image data captured by the camera.

According to the present invention, it is possible to protect the privacy of the video communication user and to efficiently manage the power consumption of the video display device.

The image display apparatus and its operation method according to the present invention are not limited to the configuration and method of the embodiments described as described above, but the embodiments are all or part of each embodiment so that various modifications can be made. May be optionally combined.

On the other hand, the operating method of the image display device of the present invention can be implemented as a processor-readable code on a processor-readable recording medium provided in the image display device. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and also include a carrier wave such as transmission through the Internet. In addition, the processor readable recording medium may be distributed over networked computer systems so that code readable by the processor in a distributed manner can be stored and executed.

In addition, while the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (17)

Entering a video communication mode;
Displaying the video communication image on at least a portion of the display;
Detecting a location of the user; And
If the user's location is outside the photographing area of the camera, cutting off power of at least a part of the entire area of the display or displaying a screen saver image on at least part of the area; Way. The method of claim 1,
And the at least one of a user image to be transmitted and a counterpart image to be received. The method of claim 2,
And the user image is an image captured by a camera or an image stored in a storage unit. The method of claim 1,
The position detection of the user is an operating method of the image display device, characterized in that detected by the infrared sensor or the camera. The method of claim 1,
And maintaining the video communication mode when the location of the user is located in the photographing area of the camera. The method of claim 1,
Transmitting previously stored image data to a video communication counterpart through a network. The method of claim 1,
And re-entering the video communication mode when the user is located in the photographing area of the camera again. The method of claim 1,
And detecting the movement of the user. 9. The method of claim 8,
And outputting a warning sound when the user is separated from the image display device by more than a predetermined distance. 9. The method of claim 8,
And re-entering the video communication mode when the user is located in the photographing area of the camera again. The method of claim 1,
Obtaining an image with a camera;
And encoding the image data of the obtained image in a predetermined format. The method of claim 11,
And transmitting the encoded image data to a video communication counterpart via a network. The method of claim 11,
And decoding the encoded image data. The method of claim 1,
Acquiring an audio signal with a microphone;
Converting the obtained audio signal into an I2S format;
PCM encoding the converted signal; method of operating a video display device further comprising. 15. The method of claim 14,
And transmitting the encoded audio data to a video communication counterpart via a network. 15. The method of claim 14,
Decoding the encoded audio data; And
And outputting the decoded audio data. Entering a video communication mode;
Displaying the video communication image on at least a portion of the display;
Transmitting previously stored image data to a video communication counterpart through a network; And
Cutting off power of at least a part of the entire area of the display or displaying a screen saver image on at least a part of the display area.

Images