KR20130068963A - Image display apparatus, and method for operating the same - Google Patents

Abstract

PURPOSE: An image display device and an operating method thereof are provided to display a 3D image more stably and accurately. CONSTITUTION: A control unit receives a 3D image signal through an external device interface unit or a network interface unit (S1110). When the received 3D image signal is a 3D image signal of a film source, the control unit controls to change a frame rate of the received 3D image signal (S1120). The control unit controls to mix a left eye image and a right eye image per line on the basis of the 3D image signal whose frame rate is changed, and then to display the mixed image on a display (S1130). [Reference numerals] (AA) Start; (BB) End; (S1110) Receive a 3D image signal; (S1120) Convert a frame rate; (S1130) Display an image

Description

Image display apparatus, and method for operating the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus and an operation method thereof, and more particularly, to an image display apparatus and an operation method thereof that can improve the usability of a user.

A video display device is a device having a function of displaying an image that a user can view. The user can view the broadcast through the video display device. A video display device displays a broadcast selected by a user among broadcast signals transmitted from a broadcast station on a display. Currently, broadcasting is changing from analog broadcasting to digital broadcasting around the world.

Digital broadcasting refers to broadcasting in which digital video and audio signals are transmitted. Digital broadcasting is more resistant to external noise than analog broadcasting, so it has less data loss, is advantageous for error correction, has a higher resolution, and provides a clearer picture. Also, unlike analog broadcasting, digital broadcasting is capable of bidirectional service.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image display apparatus and an operation method thereof which can improve user convenience.

Another object of the present invention is to provide a video display device and a method of operating the same, which can display a 3D image more stably and accurately, thereby allowing easy viewing.

In accordance with an aspect of the present invention, there is provided a method of operating an image display device, the method comprising: receiving a 3D image signal, when the received 3D image signal is a 3D image signal of a film source, the received 3D image Converting the frame rate of the signal and displaying the mixed left eye image and the right eye image on a line-by-line basis, based on the 3D image signal of which the frame rate is converted.

In addition, the image display device according to an embodiment of the present invention for achieving the above object, the interface unit for receiving a 3D image signal, when the received 3D image signal is a 3D image signal of a film source, the received 3D image A control unit for converting a frame rate of the signal and a display for mixing and displaying the left eye image and the right eye image on a line-by-line basis, based on the converted 3D image signal.

According to an embodiment of the present invention, the 3D image can be displayed more stably and accurately, so that it can be easily viewed.

In particular, the film judder phenomenon can be reduced, thereby improving user convenience.

1 to 2 are internal block diagrams of an image display apparatus according to an embodiment of the present invention.
3 is an internal block diagram of the control unit of FIG.
4 is a diagram showing various formats of a 3D image.
5 is a diagram illustrating the operation of the 3D viewing apparatus according to the format of FIG.
6 is a diagram illustrating various scaling methods of a 3D image signal according to an exemplary embodiment of the present invention.
FIG. 7 is a diagram illustrating an image formed by a left eye image and a right eye image.
8 is a view for explaining the depth of the 3D image according to the interval between the left eye image and the right eye image.
9 is a diagram illustrating an example of an image display apparatus according to an embodiment of the present invention.
FIG. 10 is a diagram referred to for describing a film judder phenomenon. FIG.
11 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.
12 to 15 are views referred to for describing the operating method of FIG. 11.

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

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 to 2 are internal block diagrams of an image display apparatus according to an embodiment of the present invention.

1, an image display apparatus 100 according to an exemplary embodiment of the present invention includes a tuner unit 110, a demodulation unit 120, an external device interface unit 130, a network interface unit 135, (Not shown), a controller 170, a display 180, an audio output unit 185, and a 3D viewing device 195. The display unit 180 may include a display unit 140, a user input interface unit 150, a sensor unit

The tuner unit 110 selects an RF broadcast signal corresponding to a channel selected by the user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through the 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 unit 110 can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner unit 110 can be directly input to the controller 170.

The tuner unit 110 may receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Meanwhile, the tuner unit 110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among the RF broadcast signals received through the antenna in the present invention, and sequentially selects RF broadcast signals of the intermediate frequency signal, baseband image, . ≪ / RTI >

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 that simultaneously receives broadcast signals of a plurality of channels is also possible.

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 the ATSC scheme, the demodulation unit 120 performs 8-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 COFDMA (Coded Orthogonal Frequency Division Modulation) 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. The control unit 170 performs demultiplexing, video / audio signal processing, and the like, and then 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 can be connected to an external device 190 such as a digital versatile disk (DVD), a Blu ray, a game device, a camera, a camcorder, a computer . The external device interface unit 130 transmits external video, audio or data signals to the controller 170 of the video display device 100 through the connected external device 190. 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.

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

On the other hand, the external device interface unit 130 can transmit and receive data to and from the 3D viewing device 195.

The network interface unit 135 provides an interface for connecting the video display device 100 to a wired / wireless network including the 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 can receive, via the network, contents or data provided by the Internet or a content provider or a network operator. 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.

The network interface unit 135 is connected to, for example, an IP (Internet Protocol) TV and receives the processed video, audio or data signals from the settop box for IPTV to enable bidirectional communication, And can transmit the signals processed by the controller 170 to the IPTV set-top box.

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

The storage unit 140 may store a program for each signal processing and control in the control unit 170 or may store the processed video, audio, or data signals.

In addition, the storage unit 140 may perform a function for temporarily storing video, audio, or data signals input to the external device interface unit 130. [ In addition, the storage unit 140 may store information on a predetermined broadcast channel through a channel memory 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 unit 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 configured to turn on / off the power, select the channel, and display the screen from the remote control device 200 according to various communication methods such as a radio frequency (RF) communication method and an infrared Or transmit a signal from the control unit 170 to the remote control device 200. The remote control device 200 may be connected to the remote control device 200 via a network.

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 sense the position of the user or the gesture of the user, the touch or the position of the 3D viewing device 195. To this end, the sensor unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, a gyro sensor, and the like.

The control unit 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner unit 110 or the demodulation unit 120 or the external device interface unit 130 so as to output the video or audio output Signals can be generated and output.

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

The audio signal processed by the control unit 170 may be output to the audio output unit 185 as an audio signal. The audio 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.

In addition, the control unit 170 can control the overall operation in the video display device 100. [ For example, the control unit 170 may control the tuner unit 110 to control the tuning of the RF broadcast corresponding to the channel selected by the user or the previously 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 control unit 170 controls the tuner unit 110 to input a signal of a selected channel according to a predetermined channel selection command received through the user input interface unit 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.

The control unit 170 controls the operation of the external device 190 through the external device interface unit 130 according to an external device video reproducing command received through the user input interface unit 150. For example, Or the video signal or audio signal from the camcorder can be output through the display 180 or the audio output unit 185. [

Meanwhile, the control unit 170 may control the display 180 to display an image. For example, a broadcast image input through the tuner unit 110, an external input image input through the external device interface unit 130, an image input through the network interface unit 135, or an image stored in the storage unit 140 So that the image can 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.

Meanwhile, the controller 170 may generate and display a 3D object with respect to a predetermined object in the image displayed on the display 180. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), EPG (Electronic Program Guide), various menus, widgets, icons, still images, moving images, and text.

Such a 3D object may be processed to have a different depth than the image displayed on the display 180. [ Preferably, the 3D object may be processed to appear protruding from the image displayed on the display 180.

On the other hand, the control unit 170 recognizes the position of the user based on the image photographed from the photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 100 can be grasped. In addition, the x-axis coordinate and the y-axis coordinate in the display 180 corresponding to the user position can be grasped.

Although not shown in the drawing, a channel browsing processing unit for generating a channel signal or a thumbnail image corresponding to an external input signal may be further provided. The channel browsing processing unit receives the stream signal TS output from the demodulation unit 120 or the stream signal output from the external device interface unit 130 and extracts an image from an input stream signal to generate a thumbnail image . 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 control unit 170 may display a thumbnail list having a plurality of thumbnail images on the display 180 using the input thumbnail image. At this time, the thumbnail list may be displayed in a simple view mode displayed on a partial area in a state where a predetermined image is displayed on the display 180, or in a full viewing mode displayed in most areas 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 the like, and may also be capable of a 3D display. In order to view the three-dimensional image, the display 180 may be divided into an additional display method and a single display method.

The single display method can implement a 3D image only on the display 180 without a separate additional display, for example, glass, and examples thereof include a lenticular method, a parallax barrier, and the like Various methods can be applied.

In addition, the additional display method can implement a 3D image using an additional display as the 3D viewing device 195 in addition to the display 180. For example, various methods such as a head mount display (HMD) type, Can be applied.

On the other hand, the spectacle type may be divided into a passive system such as a polarized glasses type and an active system such as a shutter glass type. In addition, the head mounted display can be divided into a passive type and an active type.

On the other hand, the 3D viewing device 195 may be a 3D glass for stereoscopic viewing. The glass for 3D 195 may include a passive polarizing glass or an active shutter glass, and is described as a concept including the head mount type described above.

Meanwhile, 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 control unit 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs it as a voice. The voice output unit 185 may be implemented by various types of speakers.

A photographing unit (not shown) photographs the user. The photographing unit (not shown) may be implemented by a single camera, but the present invention is not limited thereto, and may be implemented by a plurality of cameras. On the other hand, the photographing unit (not shown) may be disposed above the display 180. The image information photographed by the photographing unit (not shown) is input to the control unit 170.

The control unit 170 can detect the gesture of the user by combining the images captured from the photographing unit (not shown) or the signals detected from the sensor unit (not shown), respectively.

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. Also, the remote control apparatus 200 can receive the video, audio, or data signal output from the user input interface unit 150 and display it or output it by the remote control apparatus 200.

The video display apparatus 100 described above can be applied to a digital broadcasting of ATSC system (8-VSB system), digital broadcasting of DVB-T system (COFDM system), digital broadcasting of ISDB-T system (BST-OFDM system) And a digital broadcasting receiver capable of receiving at least one of the digital broadcasting signals. In addition, as a 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.

Meanwhile, the video display device described in the present specification can be applied to various applications such as a TV receiver, a projector, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants) Multimedia Player).

Meanwhile, the 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 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.

Hereinafter, the image display apparatus 100 according to the embodiment of the present invention is assumed to be capable of three-dimensional display, and is described mainly on a liquid crystal display panel (LCD) -based display including a backlight unit provided with a light source. .

Referring to FIG. 2, a display 180 based on a liquid crystal display panel (LCD panel) includes a liquid crystal display (LCD) panel (hereinafter, referred to as a liquid crystal panel) (hereinafter, referred to as a liquid crystal panel 210), a driving circuit unit 230, a backlight driving unit 251, and a backlight unit ( 252 to be a liquid crystal display module.

In order to display an image, the liquid crystal panel 210 includes a plurality of gate lines GL and data lines DL intersected in a matrix, and a thin film transistor and pixel electrodes connected thereto are formed in the crossing regions. A first substrate, a second substrate with a common electrode, and a liquid crystal layer formed between the first substrate and the second substrate.

The driving circuit unit 230 drives the liquid crystal panel 210 through a control signal and a data signal supplied from the controller 170 of FIG. 1. To this end, the driving circuit unit 230 includes a timing controller 232, a gate driver 234, and a data driver 236.

The timing controller 232 receives a control signal from the control unit 170, an R, G, B data signal, a vertical synchronization signal Vsync, and the like, and responds to the control signal with the gate driver 234 and the data driver 236. ), The R, G, and B data signals are rearranged and provided to the data drive 236.

Under the control of the gate driver 234, the data driver 236, and the timing controller 232, the scan signal and the image signal are supplied to the liquid crystal panel 210 through the gate line GL and the data line DL.

The backlight unit 252 supplies light to the liquid crystal panel 210. To this end, the backlight unit 252 may include a plurality of light sources.

 The backlight driver 251 may generate a signal for driving the backlight unit, and control the plurality of light sources to turn on / off the light source or to drive the light source. According to an exemplary embodiment, the backlight driver 251 may be divided into a scan driver that controls scanning driving of the backlight unit 252 and a driver that turns on / off the light source.

A predetermined image is displayed using light emitted from the backlight unit 252 in a state in which light transmittance of the liquid crystal layer is controlled by an electric field formed between the pixel electrode and the common electrode of the liquid crystal panel 210.

The power supply unit 190 may supply the common electrode voltage Vcom to the liquid crystal panel 210 and supply the gamma voltage to the data driver 236. In addition, driving power may be supplied to the backlight unit 252.

FIG. 3 is an internal block diagram of the control unit of FIG. 1, FIG. 4 is a diagram illustrating various formats of a 3D image, and FIG. 5 is a diagram illustrating operations of a 3D viewing apparatus according to the format of FIG.

A controller 170 according to an exemplary embodiment of the present invention includes a demultiplexer 310, an image processor 320, an OSD generator 340, a mixer 345, (350), and a formatter (360). An audio processing unit (not shown), and a data processing unit (not shown).

The demultiplexer 310 demultiplexes the input stream. For example, when an MPEG-2 TS is input, it can be demultiplexed 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 processing unit 320 may include a video decoder 225 and a scaler 235. [

The video decoder 225 decodes the demultiplexed video signal and the scaler 235 performs scaling so that the resolution of the decoded video signal can be output from the display 180.

The video decoder 225 may include a decoder of various standards. For example, the video 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.

On the other hand, the image signal decoded by the image processing unit 320 can be divided into a case where there is only a 2D image signal, a case where a 2D image signal and a 3D image signal are mixed, and a case where there is only a 3D image signal.

For example, when an external video signal input from the external device 190 or a broadcast video signal of a broadcast signal received from the tuner unit 110 includes only a 2D video signal, when a 2D video signal and a 3D video signal are mixed And a case where there is only a 3D video signal. Accordingly, the controller 170, particularly, the image processing unit 320 and the like can process the 2D video signal, the mixed video signal of the 2D video signal and the 3D video signal, , A 3D video signal can be output.

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

4, the format of the 3D video signal is a side-by-side format (Fig. 4A) in which the left eye image signal L and the right eye image signal R are arranged left and right, A frame sequential format (FIG. 4C) for arranging in a time division manner, an interlaced format (FIG. 4B) for mixing the left eye image signal and the right eye image signal line by line 4d), a checker box format (FIG. 4e) for mixing the left eye image signal and the right eye image signal box by box, and the like.

The OSD generator 340 generates an OSD signal according to a user input or itself. For example, based on a user input signal, a signal for displaying various information in a graphic or text form on the screen of the display 180 can be generated. The generated OSD signal may include various data such as a user interface screen of the video display device 100, various menu screens, a widget, and an icon. 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 video signal processed by the image processor 320. At this time, the OSD signal and the decoded video signal may include at least one of a 2D signal and a 3D signal. The mixed video signal is supplied to a frame rate converter 350.

A frame rate converter (FRC) 350 converts the frame rate of an input image. For example, a frame rate of 60 Hz is converted to 120 Hz, 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. In the case of converting the frame rate of 60 Hz to 480 Hz, it is possible to insert seven more frames of the same frame or to insert seven frames of the predicted frame.

On the other hand, the frame rate converter 350 can output the frame rate as it is without any additional frame rate conversion. Preferably, when a 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. The left eye glass of the 3D viewing apparatus 195 and the synchronization signal Vsync for opening the right eye glass can 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.

In the present specification, a 3D video signal means a 3D object. Examples of the 3D object include a picuture in picture (PIP) image (still image or moving picture), an EPG indicating broadcasting program information, Icons, texts, objects in images, people, backgrounds, web screens (newspapers, magazines, etc.).

On the other hand, the formatter 360 can change the format of the 3D video signal. For example, it can be changed to any one of various formats exemplified in FIG. Accordingly, according to the format, the operation of the 3D viewing device of the glasses type can be performed as shown in FIG.

5A illustrates operation of the 3D-use glass 195, particularly, the shutter glass 195 when the formatter 360 arranges and outputs the frames in the frame sequential format of the format shown in FIG. 4. FIG.

That is, when the left eye image L is displayed on the display 180, the left eye glass of the shutter glass 195 is opened and the right eye glass is closed. When the right eye image R is displayed, The left eye glass is closed, and the right eye glass is opened.

On the other hand, FIG. 5B illustrates the operation of the 3D-use glass 195, particularly the polarizing glass 195, when the formatter 360 arranges and outputs the side-by-side format of the format shown in FIG. On the other hand, the 3D glass 195 applied in FIG. 5 (b) may be a shutter glass, and the shutter glass at this time may be operated as a polarizing glass by keeping both the left-eye glass and right-eye glass open .

Meanwhile, the formatter 360 may convert the 2D video signal into a 3D video signal. For example, according to a 3D image generation algorithm, an edge or a selectable object is detected in a 2D image signal, and an object or a selectable object according to the detected edge is separated into a 3D image signal and is generated . At this time, the generated 3D image signal can be separated into the left eye image signal L and the right eye image signal R, as described above.

Although not shown in the drawing, it is also possible that a 3D processor (not shown) for 3-dimensional effect signal processing is further disposed after the formatter 360. The 3D processor (not shown) can process the brightness, tint, and color of the image signal to improve the 3D effect. For example, it is possible to perform signal processing such as making the near field clear and the far field blurring. On the other hand, the functions of such a 3D processor can be merged into the formatter 360 or merged into the image processing unit 320. [ This will be described later with reference to FIG. 6 and the like.

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 MPEG-2 standard encoded speech signal, it can be decoded by an MPEG-2 decoder. In addition, if the demultiplexed speech signal is a coded voice signal of the MPEG 4 BSAC (Bit Sliced Arithmetic Coding) standard according to a terrestrial DMB (Digital Multimedia Broadcasting) scheme, it can be decoded by an MPEG 4 decoder. Also, if 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 can be decoded by the AAC decoder. If the demultiplexed speech signal is a Dolby AC-3 standard encoded audio signal, it can be decoded by an AC-3 decoder.

In addition, the audio processing unit (not shown) in the control unit 170 can process a base, a treble, a volume control, and the like.

The data processing unit (not shown) in the control unit 170 can perform data processing of the demultiplexed data signal. For example, if the demultiplexed data signal is a coded data signal, it can be decoded. The encoded data signal may be EPG (Electronic Program Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on 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 above-mentioned stream, that is, the header (2 bytes) of the MPEG-2 TS.

3, the signals from the OSD generating unit 340 and the image processing unit 320 are mixed in the mixer 345 and then 3D processed in the formatter 360. However, the present invention is not limited to this, May be located behind the formatter. That is, the output of the image processing unit 320 is 3D-processed by the formatter 360, and the OSD generating unit 340 performs 3D processing together with the OSD generation. Thereafter, the processed 3D signals are mixed by the mixer 345 It is also possible to do.

Meanwhile, the block diagram of the controller 170 shown in FIG. 3 is a block diagram for an embodiment of the present invention. Each component of the block diagram can be integrated, added, or omitted according to the specifications of the control unit 170 actually implemented.

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

6 is a diagram illustrating various scaling methods of a 3D image signal according to an exemplary embodiment of the present invention.

Referring to the drawing, in order to increase the 3-dimensional effect, the controller 170 may perform 3D effect signal processing. Among them, in particular, the size or tilt of the 3D object in the 3D image may be adjusted.

The 3D object 510 in the 3D image signal or the 3D image signal can be enlarged or reduced 512 as a whole at a certain ratio as shown in FIG. 6 (a), and also, as shown in FIG. 6 (b) , The 3D object may be partially enlarged or reduced (trapezoidal shape, 514, 516). 6 (d), at least a portion of the 3D object may be rotated (parallelogram shape 518). This scaling (scaling) or skew adjustment can emphasize the 3D effect of a 3D object in a 3D image or a 3D image, that is, a 3D effect.

On the other hand, as the slope becomes larger, as shown in FIG. 6 (b) or 6 (c), the length difference between the parallel sides of the trapezoidal shapes 514 and 516 increases, or as shown in FIG. 6 (d), the rotation angle is increased. It gets bigger.

The size adjustment or the tilt adjustment may be performed after the 3D image signal is aligned in a predetermined format in the formatter 360. [ Or in the scaler 235 in the image processing unit 320. [ On the other hand, the OSD generating unit 340 may generate an object in a shape as illustrated in FIG. 6 for the OSD generated for 3D effect enhancement.

Although not shown in the drawing, signal processing for a 3D effect (3-dimensional effect) may be performed by adjusting the brightness, tint, and brightness of an image signal or object, It is also possible that signal processing such as color adjustment is performed. For example, it is possible to perform signal processing such as making the near field clear and the far field blurring. The signal processing for the 3D effect may be performed in the controller 170 or may be performed through a separate 3D processor. Particularly, when it is performed in the control unit 170, it is possible to perform it in the formatter 360, or in the image processing unit 320, together with the above-described size adjustment or tilt adjustment.

FIG. 7 is a view for explaining how images are formed by a left eye image and a right eye image, and FIG. 8 is a view for explaining depths of a 3D image according to an interval between a left eye image and a right eye image.

First, referring to FIG. 7, a plurality of images or a plurality of objects 615, 625, 635, and 645 are illustrated.

First, the first object 615 includes a first left eye image 611 (L) based on the first left eye image signal and a first right eye image 613 (R) based on the first right eye image signal, It is exemplified that the interval between the first left eye image 611, L and the first right eye image 613, R is d1 on the display 180. [ At this time, the user recognizes that an image is formed at an intersection of an extension line connecting the left eye 601 and the first left eye image 611 and an extension line connecting the right eye 603 and the first right eye image 603. Accordingly, the user recognizes that the first object 615 is positioned behind the display 180. [

Next, since the second object 625 includes the second left eye image 621, L and the second right eye image 623, R and overlaps with each other and is displayed on the display 180, do. Accordingly, the user recognizes that the second object 625 is located on the display 180. [

Next, the third object 635 and the fourth object 645 are arranged in the order of the third left eye image 631, L, the second right eye image 633, R, the fourth left eye image 641, Right eye image 643 (R), and their intervals are d3 and d4, respectively.

According to the above-described method, the user recognizes that the third object 635 and the fourth object 645 are positioned at positions where the images are formed, respectively, and recognizes that they are located before the display 180 in the drawing.

At this time, it is recognized that the fourth object 645 is projected before the third object 635, that is, more protruded than the third object 635. This is because the interval between the fourth left eye image 641, L and the fourth right eye image 643, d4 is larger than the interval d3 between the third left eye image 631, L and the third right eye image 633, R. [

Meanwhile, in the embodiment of the present invention, the distance between the display 180 and the objects 615, 625, 635, and 645 recognized by the user is represented by a depth. Accordingly, it is assumed that the depth when the user is recognized as being positioned behind the display 180 has a negative value (-), and the depth when the user is recognized as being positioned before the display 180 (depth) has a negative value (+). That is, the greater the degree of protrusion in the user direction, the greater the depth.

8, the interval a between the left eye image 701 and the right eye image 702 in FIG. 8A is smaller than the interval between the left eye image 701 and the right eye image 702 shown in FIG. 8 (b) (b ') of the 3D object shown in Fig. 8 (b) is larger than the depth a' of the 3D object shown in Fig. 8 (a).

In this way, when the 3D image is exemplified as the left eye image and the right eye image, the positions recognized as images are different depending on the interval between the left eye image and the right eye image. Accordingly, by adjusting the display intervals of the left eye image and the right eye image, the depth of the 3D image or the 3D object composed of the left eye image and the right eye image can be adjusted.

9 is a diagram illustrating an example of an image display apparatus according to an embodiment of the present invention.

The 3D image display apparatus using the currently available spectacle 3D viewing apparatus changes the polarization direction of the left and right parallax images or displays them in a time division manner, and implements a stereoscopic image using polarized glasses or shutter glasses.

For example, the 3D glasses currently on the market can be roughly divided into a patterned retarder method and a shutter glasses method.

Among these, the patterned retarder method has advantages such as light and comfortable glasses, high brightness, and low crosstalk compared to the shutter glass method. However, the patterned retarder method has a limitation in vertical viewing angle due to structural problems. have.

An example of a patterned retarder method will be described with reference to FIG. 9.

Looking at the basic principle of the patterned retarder method, the image display device attaches a different polarization filter, that is, a patterned retarder for each line in the horizontal direction, and the left eye corresponding to each line. (L) and right eye (R) images are displayed. The user can view this through the polarizing glasses composed of polarizing filters corresponding to the polarizing filters (patterned retarder) of L and R, respectively, to realize a 3D image.

The patterned retarder type image display device may include a polarization filter (patterned retarder) for switching the polarization characteristics of the light incident on the polarizing glasses 195 on the display panel. .

The image display device alternately displays the left eye image L and the right eye image R on a display panel alternately for each line, and switches the polarization characteristics incident on the polarizing glasses 195 through the pattern retarder. In this way, the left eye image L and the right eye image R may be spatially divided to implement a stereoscopic image.

The patterned retarder type image display apparatus may be composed of two parts, an odd line and an even line, and the polarized glasses may be an odd line and an even line. Even line) can be separated into left and right to make viewers feel 3D.

Meanwhile, when the display panel is a liquid crystal display panel, the image display apparatus may include a backlight unit for irradiating light including a light source, and a polarizing film may be attached to the front and rear of the display panel.

The patterned retarder may be disposed on the front of the display panel in various ways. For example, it may be formed by laminating (polarizing) to the polarizing film, or may be formed on a separate base portion such as a transparent substrate.

FIG. 10 is a diagram for explaining a film judder phenomenon, and more specifically, a diagram illustrating a film judder phenomenon based on a 2D image of a conventional film source.

10 (a) illustrates the frames A, B, Z of the film source.

Unlike a broadcast image, a movie of a film source may provide a moving image by continuously playing a still image at 24 frames per second.

Therefore, in the image display apparatus that receives the image signal of the film source, the image may be reproduced by performing a process of converting a 24 frame film per second into an image of 25, 30, 60 frames per second, like a general broadcast image. . That is, a process of converting the frame rate can be performed.

10B illustrates a 3: 2 pull-down scheme.

On the other hand, the 3: 2 pull-down method is a method of extracting three, two, three, two ..... in sequence from the plurality of frames constituting the film. Meanwhile, the frames thus extracted may be called a field.

For example, if 24Hz is 60Hz, that is, 24 frames are made of 60 frames, a plurality of frames, such as 2 or 3 frames, are repeatedly generated by replicating one frame.

Referring to FIGS. 10A and 10B, an 'A' frame may be converted into three 'A' frames, and a 'B' frame may be converted into two 'B' frames. That is, five frames can be generated from two 'A' and 'B' frames of the film source.

On the other hand, in the case of 3: 2 pull-down method, there is a risk of judder phenomenon.

Juder is a side effect that can occur when the base frame of a movie that is 24 frames is played at 60 frames 60 Hz, and the motion of the screen behind the moving person, that is, motion judder may occur. The motion judder is a phenomenon in which the eye detects and tracks movement when an object moves according to a continuous screen conversion of a moving image, that is, a continuous still image, thereby feeling an unnatural picture.

On the other hand, judging may be felt more severely in hold-type LCDs.

Such a method of reducing judder may reduce the judder by making an image in a one-to-one conversion, for example, 2: 2 or 5: 5.

The 2: 2 pull-down method uses two frames (fields) with one frame of a 24Hz film image and two frames with the next one.

In the 5: 5 pull-down method, as shown in (c) of FIG. 10, five frames are made of one frame of a film image of 24 Hz and five frames are made of the next one frame. In addition, the 5: 5 pull-down scheme may involve frame rate conversion to 120 Hz.

Meanwhile, in the case of 3D video, a more effective prevention method is required, which is more vulnerable to quality deterioration such as crosstalk and judder than 2D video.

FIG. 11 is a flowchart illustrating a method of operating an image display device according to an exemplary embodiment of the present invention, and FIG. 12 is a view referred to for explaining the method of FIG. 11.

Referring to the drawings, the image display apparatus 100 may receive a 3D image signal through the external device interface 130 or the network interface 135 (S1110).

If the received 3D image signal is a 3D image signal of a film source, the controller 170 may control to convert the frame rate of the received 3D image signal (S1120).

In particular, as described above with reference to FIG. 3, the frame rate converter 350 may perform frame rate conversion.

Meanwhile, the 3D image signal of the film source may include a left eye image frame and a right eye image frame as shown in FIG. 12, and each of the left eye image frame and the right eye image frame may be configured as 24 sheets.

Meanwhile, in the frame rate converting step (S1120), the frame rate of the received 3D video signal may be increased by 2n times.

Here, n means an integer of 1,2,3 ...

According to an embodiment of the present invention, since the input signal may be divided into odd lines and even lines, a 3D judder caceller may be formed by multiplying an image divided by odd and even lines. Can be.

That is, "an integer multiple of the frame frequency (Hz) X 2 of the original source" can be implemented.

In other words, if the input signal is 24Hz, it is divided into odd and even to display 48Hz, and the frame rate is converted to an integer multiple of 48Hz (48Hz, 96Hz, 144Hz, 192Hz, 240Hz,…) to convert the 3D Judder Caceller. Can be configured.

According to the above configuration, the motion juddering time in FIG. 10B can be removed, and the image of the film source can be displayed accurately and without noise in the image display device.

In addition, the frame rate converting step (S1120) may increase the frame rate of the left eye image frame and the right eye image frame of the received 3D image signal by 2n times, respectively.

Meanwhile, the left eye image frame and the right eye image frame of the received 3D image signal may be stored in the storage 140.

The frame rate converting step (S1120) may generate a left eye image frame of odd-numbered lines and a left eye image frame of even-numbered lines based on the left eye image frame of the received 3D image signal, and receive the received 3D image signal. The right eye image frame of the odd-numbered line and the right eye image frame of the even-numbered line may be generated based on the right eye image frame of.

13 illustrates an example of frame conversion of a left eye image frame.

Referring to the drawing, first, the left eye image frame L1_odd of the odd-numbered line and the left eye image frame L1_even of the even-numbered line are generated based on the first left eye image frame L1. Meanwhile, the left eye image frame L1_odd of the odd-numbered line and the left eye image frame L1_even of the even-numbered line may be generated by separating the left eye image frame L1.

Meanwhile, the left eye image frame L2_odd of the odd-numbered line and the left eye image frame L2_even of the even-numbered line may be generated based on the second left eye image frame L2.

Thereafter, the remaining left eye image frames may be separated into left eye image frames of odd-numbered lines and left eye image frames of even-numbered lines in the same manner.

In addition, the right eye image frame may also generate the right eye frame of the odd-numbered line and the right eye frame of the even-numbered line based on the right eye image frame of the 3D image signal.

In addition, the left eye image frame and the right eye image frame of the 3D image signal having the frame rate converted may be stored in the storage 140.

Thereafter, the controller 170 may control to display the left eye image and the right eye image on a display 180 by mixing the left eye image and the right eye image based on the 3D image signal having the frame rate converted therein (S1130).

That is, the generated left eye image frames (L1_odd, L2_odd ...) of the odd-numbered lines, left eye image frames (L1_even, L2_even, ...) of even-numbered lines, right eye image frames of odd-numbered lines and right eye of even-numbered lines By displaying the image frames mixed for each line, a 3D image can be displayed.

14, in the first frame, the left eye image frame (L1_odd, 1410) is displayed on odd lines of 1, 3 ... 1079, and the right eye image of even lines is displayed on even lines of 2, 4 ... 1080. The frame 1420 may be displayed.

In the second frame, the left eye image frames L1_even and 1430 of the even line are displayed on the even lines of 2, 4 ... 1080, and the odd lines of the odd lines of 1, 3 ... 1079 are displayed. The right eye image frame 1440 may be displayed.

This process can be performed at a rate of 48 images per second, and viewers can recognize left and right eye images and watch 3D images using polarized glasses.

Meanwhile, in the frame rate converting step (S1120), a left eye image frame is increased to a left eye image frame of the odd-numbered line and a left eye image frame of an even-numbered line, and the even-numbered right eye image frame of the odd-numbered line is increased. The right eye image frame may be increased to the right eye image frame of the first line.

Referring to FIG. 13C compared to FIG. 13B, the left eye image frame may be increased to the left eye image frame L1_odd of the odd-numbered line and the left eye image frame L1_even of the even-numbered line. have.

Also, the right eye image frame may be increased in the same manner.

Accordingly, the frame rate is converted to 96 Hz by copying and interpolating the frames when the 24 Hz input signal is divided into an odd line and an even line and becomes 48 Hz as shown in FIG. 13B. The frame rate can be converted to an integer multiple of 48 Hz (48 Hz, 96 Hz, 144 Hz, 192 Hz, 240 Hz, ...) by performing multiple copies and interpolation of the frames.

As the frame rate is increased, the effects of preventing motion judder, motion blur, and cross-talk phenomenon can be increased.

Meanwhile, although FIG. 13C illustrates an example in which the separated and duplicated frames are arranged as L1_odd, L1_odd, L1_even, L1_even, L2_odd, L2_odd, L2_even, L2_even ..., the order of the frames may be changed. .

For example, as shown in FIG. 15, odd-numbered lines and even-numbered lines may be alternately arranged as L1_odd, L1_even, L1_odd, L1_even, L2_odd, L2_even, L2_odd, L2_even ....

According to the embodiment of the present invention, it is possible to reduce the film judder phenomenon, etc., it is possible to display the 3D image more stably and accurately.

Accordingly, the user can easily watch the 3D image, thereby improving the user's convenience.

The present invention can display a 3D image without judder, especially when the input signal is a film source signal in a patterned retarder 3D scheme.

The image display apparatus and the operation method thereof according to the present invention are not limited to the configuration and method of the embodiments described above but the embodiments can be applied to all or some of the embodiments May be selectively combined.

Meanwhile, the operation method of the image display apparatus of the present invention can be implemented as a code that can be read by a processor on a recording medium readable by a processor included in the image display apparatus. 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 recording medium that can be read by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet . In addition, the processor-readable recording medium may be distributed over network-connected computer systems so that code readable by the processor in a distributed fashion can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

Claims (14)

Receiving a 3D video signal;
If the received 3D video signal is a 3D video signal from a film source, converting a frame rate of the received 3D video signal; And
And mixing the left eye image and the right eye image for each line based on the 3D image signal having the frame rate converted therefrom. The method of claim 1,
In the frame rate converting, the frame rate of the received 3D video signal is increased by 2n times. The method of claim 1,
In the frame rate converting, the frame rate of the left eye image frame and the right eye image frame of the received 3D image signal are increased by 2n times, respectively. The method of claim 1,
The frame rate converting may include generating a left eye image frame of an odd-numbered line and a left eye image frame of an even-numbered line based on a left eye image frame of the received 3D image signal, and adding the left eye image frame of an even line to a right eye image frame of the received 3D image signal. And a right eye image frame of odd lines and a right eye image frame of even lines. 5. The method of claim 4,
The frame rate converting may include: increasing a left eye image frame to the generated left eye image frame of the odd-numbered line and a left eye image frame of even-numbered line, and generating the right eye image frame of the odd-numbered line and the right eye image of the even-numbered line. And a right eye image frame is increased by a frame. The method of claim 1,
And storing a left eye image frame and a right eye image frame of the received 3D image signal. The method of claim 1,
And storing a left eye image frame and a right eye image frame of the 3D image signal having the frame rate converted therein. An interface unit for receiving a 3D video signal;
A controller configured to convert a frame rate of the received 3D image signal when the received 3D image signal is a 3D image signal of a film source; And
And a display configured to display a left eye image and a right eye image by line on the basis of the 3D image signal having the frame rate converted therefrom. 9. The method of claim 8,
And the controller increases the frame rate of the received 3D image signal by 2n times. 9. The method of claim 8,
And the controller increases the frame rate of the left eye image frame and the right eye image frame of the received 3D image signal by 2n times. 9. The method of claim 8,
The controller generates a left eye image frame of an odd-numbered line and a left eye image frame of an even-numbered line based on the left eye image frame of the received 3D image signal, and generates an odd number based on the right eye image frame of the received 3D image signal. And a right eye image frame of an even line and a right eye image frame of an even line. The method of claim 11,
The control unit may increase a left eye image frame to the left eye image frame of the odd-numbered line and a left eye image frame of even-numbered line, and the right eye to the right eye image frame of the odd-numbered line and the right eye image frame of the even-numbered line. And an image frame is increased. 9. The method of claim 8,
And a storage unit configured to store a left eye image frame and a right eye image frame of the received 3D image signal. 9. The method of claim 8,
And a storage unit configured to store a left eye image frame and a right eye image frame of the 3D image signal having the converted frame rate.

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