KR20110114295A - Apparatus for viewing 3d image and method for operating the same - Google Patents

Abstract

According to an embodiment of the present invention, the 3D image viewing apparatus includes a receiver configured to receive a first sync signal and a second sync signal, a controller to generate a first drive signal based on the first sync signal, and to the first drive signal. And a left and right eyeglasses to be opened and closed along with the first driving signal, and a comparison signal part for generating a comparison signal based on the first driving signal and outputting the comparison signal to the controller. And generating a second driving signal based on the comparison signal.
A method of operating a 3D image viewing apparatus according to an exemplary embodiment of the present invention may include receiving a first synchronization signal, generating a first driving signal based on the first synchronization signal, and based on the first driving signal. Generating a comparison signal; receiving a second synchronization signal; and generating a second driving signal based on the second synchronization signal and the comparison signal.
According to the present invention, it is possible to prevent the signal interference and noise influence of the receiver of the 3D image viewing apparatus, and to accurately receive the signal transmitted from the image display apparatus, thereby more accurately and easily viewing the 3D image.

Description

Apparatus for viewing 3D image and method for operating the same}

The present invention relates to a 3D image viewing apparatus and a method of operating the same, and more particularly, to a 3D image viewing apparatus and a method of operating the 3D image that can be viewed more accurately and easily.

The image display device is a device having a function of displaying an image that a user can watch. The user can watch the broadcast through the image 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 shifting from analog broadcasting to digital broadcasting worldwide.

Digital broadcasting refers to broadcasting for transmitting digital video and audio signals. 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. In addition, unlike analog broadcasting, digital broadcasting is capable of bidirectional services.

Also. Recently, various researches on stereoscopic images have been conducted, and stereoscopic imaging techniques are becoming more and more common and practical in computer graphics as well as in various other environments and technologies.

Also. There is also an increasing number of studies on the image viewing apparatus capable of viewing stereoscopic images.

Disclosure of Invention An object of the present invention is to provide a 3D image viewing apparatus and a method of operating the same, capable of easily watching 3D images.

In addition, it is an object of the present invention, to prevent the signal interference and noise effects of the receiver of the 3D video viewing device, and to accurately receive the signal transmitted from the video display device, 3D video viewing that can more accurately and easily watch 3D video An apparatus and a method of operating the same are provided.

According to an aspect of the present invention, there is provided a 3D image viewing apparatus comprising: a receiver configured to receive a first sync signal and a second sync signal, a controller configured to generate a first driving signal based on the first sync signal; The control unit includes a left and right eyeglasses that are opened and closed according to the first driving signal and the first driving signal, and a comparison signal unit which generates a comparison signal based on the first driving signal and outputs the comparison signal to the controller. The second driving signal is generated based on the second synchronization signal and the comparison signal.

According to another aspect of the present invention, there is provided a method of operating a 3D image viewing apparatus, the method comprising: receiving a first synchronization signal, generating a first driving signal based on the first synchronization signal, Generating a comparison signal based on the first driving signal; receiving a second synchronization signal; and generating a second driving signal based on the second synchronization signal and the comparison signal.

It is possible to prevent signal interference and noise influence of the receiver of the 3D image viewing apparatus and to accurately receive a signal transmitted from the image display apparatus, thereby to view the 3D image more accurately and easily.

1 is an internal block diagram of an image display apparatus according to an embodiment of the present invention.
FIG. 2 is an internal block diagram of the controller of FIG. 1.
3 is a diagram illustrating various formats of a 3D image.
FIG. 4 is a diagram illustrating an operation of a 3D image viewing apparatus according to the frame sequential format of FIG. 3.
5 is an internal block diagram of a 3D image viewing apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a method of operating a 3D image viewing apparatus according to an exemplary embodiment of the present invention.
7 to 9 are views for explaining an operating method of the 3D image viewing apparatus of FIG.

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

The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, the "module" and "unit" may be used interchangeably.

1 to 2 are internal block diagrams of an image display apparatus according to an 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 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 controller 170, a display 180, an audio output unit 185, a power supply unit 190, and a 3D image viewing apparatus 195.

The tuner 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.

Also, the tuner 110 can receive RF carrier signals of a single carrier according to an Advanced Television System Committee (ATSC) scheme or RF carriers of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Meanwhile, the tuner 110 sequentially selects RF broadcast signals of all broadcast channels stored through a channel memory function among RF broadcast signals received through an antenna and converts them into intermediate frequency signals or baseband video or audio signals. I can convert it.

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 110 is an ATSC scheme, the demodulator 120 performs 8-VSB (8-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 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. To this end, the demodulator 120 may include a convolutional decoder, a deinterleaver, a reed-soloman decoder, and the like to perform convolutional decoding, deinterleaving, and reed-soloman 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 may connect the external device to the image display device 100. 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 an external device 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 / wireless. The external device interface unit 130 transmits an image, audio or data signal input from the outside to the controller 170 of the image display device 100 through a connected external device. 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 device 100 may be connected to other electronic devices and networks according to communication standards such as Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, etc. Can be connected.

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.

Meanwhile, the external device interface unit 130 may transmit / receive data with the 3D image viewing device 195.

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, content such as a movie, an advertisement, a game, a VOD, a broadcast signal, and related information provided from a content provider may be received 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.

In addition, for example, the user input interface unit 150 may transmit a user input signal input from a sensing unit (not shown) that senses a user's gesture to the controller 170 or may transmit a signal from the controller 170. The transmission may be transmitted to a sensing unit (not shown). Here, the sensing unit (not shown) may include a touch sensor, an audio sensor, a position sensor, an operation sensor, and the like.

The controller 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner 110, the demodulator 120, or the external device interface unit 130, and outputs a video or audio signal. You can create 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. 2.

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 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.

As another example, the controller 170 may, for example, receive an external device image playback command received through the user input interface unit 150, from an external device input through the external device interface unit 130, for example, a camera or a camcorder. The video signal or the audio signal 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, a broadcast image input through the tuner 110, an external input image input through the external device interface unit 130, or an image input through the network interface unit 135 or an image stored in the storage unit 140. 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.

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.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, 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.

The controller 170 recognizes a user's position based on an image photographed by a photographing unit (not shown). For example, 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 image display apparatus 100 corresponding to the user position can be grasped.

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 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 in particular, according to an embodiment of the present invention, it is preferable that a 3D display is possible.

The display 180 may be divided into an additional display method and a single display method for viewing a 3D image.

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, various methods such as a lenticular method and a parallax barrier may be used. Can be applied.

On the other hand, the additional display method, as an additional display in addition to the display 180, that is to implement a 3D image using a 3D image viewing device, for example, a variety of methods such as head-mounted display (HMD) type, glasses type can be applied have. In addition, the spectacle type may be further divided into a passive method such as a polarized glasses type and an active method such as a shutter glass type. On the other hand, the head mounted display type can be divided into passive and active methods.

In the embodiment of the present invention, a 3D image viewing apparatus 195 is provided for viewing 3D images. The 3D image viewing apparatus 195 is an additional display of the active type among the various types described above. Hereinafter, the description will be based on the shutter glass.

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 audio output unit 185 may be implemented by various types of speakers.

Meanwhile, in order to detect a gesture of a user, as described above, a sensing unit (not shown) including at least one of a touch sensor, a voice sensor, a position sensor, and a motion sensor may be further provided in the image display apparatus 100. have. The signal detected by the sensing unit (not shown) is transmitted to the controller 170 through the user input interface unit 150.

The controller 170 may detect a gesture of the user by combining or combining the image photographed by the photographing unit (not shown) or the detected signal from the sensing unit (not shown).

The power supply unit 190 supplies the corresponding power throughout the image display apparatus 100. In particular, power may be supplied to the controller 170, which may be implemented in the form of a System On Chip (SOC), a display 180 for displaying an image, and an audio output unit 185 for audio output. have. In addition, according to the exemplary embodiment, power may be supplied to a heat generating unit including a heating wire.

The remote control apparatus 200 transmits the user input to the user input interface unit 150. To this end, the remote control device 200 may use infrared (IR) communication, RF (Radio Frequency) communication, Bluetooth (Bluetooth), UWB (Ultra Wideband), ZigBee (ZigBee) method and 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 video display device described in the present specification is a TV receiver, a mobile phone, a smart phone (notebook computer), a digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), etc. 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.

2 is an internal block diagram of the controller of FIG. 1, FIG. 3 is a diagram illustrating various formats of a 3D image, and FIG. 4 is a diagram illustrating an operation of a shutter glass according to the frame sequential format of FIG. 3.

Referring to the drawings, the control unit 170 according to an embodiment of the present invention, the demultiplexer 210, the image processor 220, the OSD generator 240, the mixer 245, the frame rate converter 250, and a formatter 260. In addition, the apparatus may further include a voice processor (not shown) and a data processor (not shown).

The demultiplexer 210 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. Here, the stream signal input to the demultiplexer 210 may be a stream signal output from the tuner 110, the demodulator 120, or the external device interface unit 130.

The image processor 220 may perform image processing of the demultiplexed image signal. To this end, the image processor 220 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 decoders of various standards.

For example, when the demultiplexed video signal is an encoded 2D video signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder.

Also, for example, the demultiplexed 2D video signal is a digital video broadcasting (DMB) method or a video signal of H.264 standard according to DVB-H, or a depth video of MPEC-C part 3 , Multi-view video according to Multi-view Video Coding (MVC) or free-view video according to Free-viewpoint TV (TV), respectively, decoded by H.264 decoder, MPEC-C decoder, MVC decoder or FTV decoder Can be.

Meanwhile, the image signal decoded by the image processor 220 may be classified into a case in which only a 2D image signal is present, a case in which a 2D image signal and a 3D image signal are mixed, and a case in which only a 3D image signal is present.

The image processor 220 may detect whether the demultiplexed video signal is a 2D video signal or a 3D video signal. Whether the image is a 3D image signal may be detected based on a broadcast signal received from the tuner 110, an external input signal from an external device, or an external input signal received through a network. In particular, whether the 3D video signal is a 3D video signal may be determined by referring to a 3D video flag, 3D video metadata, or 3D video format information in the header of the stream. You can judge.

The image signal decoded by the image processor 220 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.

Here, the format of the 3D video signal is a side by side format (FIG. 3A) in which the left eye video signal L and the right eye video signal R are arranged left and right, as shown in FIG. Frame Sequential format (FIG. 3B), Top / Down format (FIG. 3C) arranged up and down, and Interlaced format for mixing a left eye video signal and a right eye video signal line by line (FIG. 3B). 3d), a checker box format (FIG. 3E) for mixing the left eye image signal and the right eye image signal for each box may be used.

The OSD generator 240 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 245 may mix the OSD signal generated by the OSD generator 240 and the decoded image signal processed by the image processor 220. In this case, the OSD signal and the decoded video signal may each include at least one of a 2D signal and a 3D signal. The mixed video signal is provided to the frame rate converter 250.

The frame rate converter 250 converts the frame rate of the input video. For example, a 60Hz frame rate is converted to 120Hz or 240Hz. 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.

The formatter 260 may receive a mixed signal from the mixer 245, that is, an OSD signal and a decoded video signal, and separate the 2D video signal and the 3D video signal.

Meanwhile, in the present specification, a 3D video signal means a 3D object, and examples of such an object include a picture in picture (PIP) image (still image or a video), an EPG indicating broadcast program information, various menus, widgets, There may be an icon, text, an object in the image, a person, a background, a web screen (newspaper, magazine, etc.).

The formatter 260 may change the format of the 3D video signal. For example, it may be changed to any one of the various formats illustrated in FIG. 3. In particular, in the embodiment of the present invention, changing to the frame sequential format in the format of FIG. 3 is taken as an example. That is, the left eye image signal L and the right eye image signal R are alternately arranged in sequence. Accordingly, the 3D image viewing apparatus 195 of FIG. 1 is preferably a shutter glass.

4 illustrates an operation relationship between the shutter glass 195 and the frame sequential format. FIG. 4A illustrates that the left eye glass of the shutter glass 195 is opened and the right eye glass is closed when the left eye image L is displayed on the display 180. FIG. 4B shows the shutter glass 195. The left eye glass of) is closed, and the right eye glass is opened.

The formatter 260 may convert a 2D video signal into a 3D video signal. For example, an edge or selectable object may be detected within the 2D image signal according to a 3D image generation algorithm, and an object or selectable object according to the detected edge may be separated into a 3D image signal and generated. Can be. In this case, the generated 3D image signal may be separated into a left eye image signal L and a right eye image signal R as described above.

The voice processing unit (not shown) in the controller 170 may perform voice processing of the demultiplexed voice signal. To this end, the voice 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 voice processing unit (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 TSC-PSIP (ATSC-Program and System Information Protocol) information in the ATSC scheme, and may include DVB-Service Information (DVB-SI) in the DVB scheme. . The ATSC-PSIP information or the DVB-SI information may be information included in the aforementioned stream, that is, the header (4 bytes) of the MPEG-2 TS.

Meanwhile, although FIG. 2 illustrates that the signals from the OSD generator 240 and the image processor 220 are mixed in the mixer 245 and then 3D processed in the formatter 260, the mixer is not limited thereto. May be located after the formatter. That is, the output of the image processor 220 is 3D processed by the formatter 260, and the OSD generator 240 performs 3D processing together with OSD generation, and then mixes each processed 3D signal by the mixer 245. It is also possible.

Meanwhile, a block diagram of the controller 170 shown in FIG. 2 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 specification of the controller 170 that is actually implemented.

In particular, the frame rate converter 250 and the formatter 260 may not be provided in the controller 170, but may be separately provided.

5 is an internal block diagram of a 3D image viewing apparatus according to an embodiment of the present invention.

Referring to the drawings, the 3D image viewing apparatus according to the embodiment of the present invention generates a first driving signal based on the receiver 510 for receiving the first synchronization signal and the second synchronization signal, based on the first synchronization signal. The controller 520 receives the left and right eyeglasses 550 and the first driving signal, which are opened and closed according to the first driving signal, and generates a comparison signal based on the first driving signal to generate the comparison signal to the controller 520. And a comparison signal unit 530 for outputting, and the controller 520 generates a second driving signal based on the second synchronization signal and the comparison signal.

The receiver 510 receives a signal transmitted from the image display apparatus, and the controller 520 converts the received signal into a driving signal for controlling the left eye glass unit 551 and the right eye glass unit 520. According to an embodiment, the apparatus may further include a Mux 540 for signal processing. In response to the driving signal, the left and right eyeglasses 550 finally perform an on and off operation, that is, an opening and closing operation.

The image display device may alternately align the left eye image signal L and the right eye image signal R sequentially. Accordingly, when the left eye image L is displayed on the display 180, the left eye glass unit 551 may It is opened and the right eye glass portion 552 is closed. When the right eye image R is displayed, the left eye glass unit 551 is closed and the right eye glass unit 552 is opened. That is, the opening and closing operations of the left and right eyeglasses 550 may be synchronized with the image displayed by the image display device.

On the other hand, when the left and right sync (L, R sync) information transmitted from the 3D image display apparatus is transmitted from a plurality of image display apparatuses or an electronic device transmitting information in a form similar to the transmitted information, One receiver may receive a plurality of synchronization information. As a result, the liquid crystals of the left and right eyeglasses cannot be operated in synchronization with the synchronization signal, and thus, the user cannot view accurate 3D images from the desired image display device.

The present invention constructs a feedback structure that can use the output of the control unit 520 as an input of the comparison signal unit 530 again, compares the received signals and generates drive signals, thereby preventing interference from the plurality of transmitters. Since it can be excluded, signal interference by a plurality of image display devices or electronic devices can be eliminated, and influence by external noise can be eliminated.

According to an exemplary embodiment, the comparison signal unit 530 may generate the comparison signal in the same form as the synchronization signal based on the period of the first driving signal. That is, the synchronous signal received from the period of the first driving signal is calculated inversely to generate a virtual synchronous signal as a comparison signal.

Subsequently, the controller 520 compares the second synchronization signal with the comparison signal to generate a second driving signal for driving the left and right eyeglass units 550 to a matched portion. The comparison signal is a signal generated by inverse calculation from a normally received signal, and a portion which is not in common with a later received synchronization signal is likely to be a component due to noise or interference. Accordingly, when the driving signal is generated by comparing the second synchronization signal with the comparison signal, a stable driving signal can be generated.

In the case where the second synchronization signal and the comparison signal are completely identical, any one of the second synchronization signal and the comparison signal may be output as a driving signal. Thereafter, the left and right eyeglasses 550 are opened and closed according to the second driving signal.

According to an exemplary embodiment, the comparison signal unit 530 outputs the first driving signal as the comparison signal, and the controller 520 generates a driving signal based on the second synchronization signal, and outputs the comparison signal. The second driving signal may be generated by comparing with each other. Thereafter, the left and right eyeglasses 550 are opened and closed according to the second driving signal.

That is, since the control unit 520 has both the received synchronization signal and the generated driving signal, the comparison signal unit 530 may feed back the synchronization signal itself, which is the output of the control unit 520, to the control unit 520 as a comparison signal. have. The controller 520 may generate a stable driving signal from which noise is removed by comparing the feedback signal with the generated driving signal.

Meanwhile, the controller 520 and the comparison signal unit 530 may include a buffer and a storage unit for storing various signals, or may use a separate storage unit.

Meanwhile, as described above, the first and second synchronization signals may be signals synchronized to an image displayed on the image display apparatus. It may be a vertical synchronization signal (Vsync), a signal synchronized to the left and right view image displayed on the image display device or a signal modified to be more efficient in transmission.

The first synchronization signal may be a synchronization signal at a time earlier than the second synchronization signal, and the first synchronization signal may be two synchronization signals that are first received. The first two normal input pulses are received and a comparison signal is generated based on the two received signals.

In the 3D viewing environment of the video display device, the first error and malfunction can be easily detected by the user. When the 3D video viewing device is first driven, the user does not only stare at the front of the video display device. It is less likely to introduce noise.

On the other hand, the comparison signal unit 530 may periodically update the comparison signal. In order to correct an error due to the passage of time of the comparison signal, the comparison signal may be newly generated and updated periodically, for example, every 1 second to several seconds.

The comparison signal unit 530 may be, for example, a voltage controlled crystal oscillator circuit (Vcxo). Variable crystal oscillator circuits generate clocks and signals, and have the ability to sample the signal or to vary the frequency of the signal.

6 is a flowchart illustrating a method of operating a 3D image viewing apparatus according to an exemplary embodiment of the present invention, and FIGS. 7 to 9 are views for explaining an operating method of the 3D image viewing apparatus of FIG. 6.

In the method of operating the 3D image viewing apparatus according to the embodiment of the present invention, first, a first synchronization signal is received (S610).

7 illustrates an example of a synchronization signal and a driving signal when a synchronization signal is normally received, and FIG. 8 illustrates an example of a synchronization signal and a driving signal when a synchronization signal is abnormally received.

Referring to FIG. 7A, a synchronization signal having synchronization information on an image displayed on an image display device may be received at a predetermined cycle. Since the synchronization signal is normally received without interference or noise, the driving signals of the left and right eyeglass parts are also generated correctly as shown in FIG. In the area indicated by L, the left eye glass part is opened, and in the area indicated by R, the right eye glass part is opened.

8A is an example of a noise component into which a part not included in the synchronization signal of FIG. 7A is introduced. The 3D image viewing apparatus may determine that the introduced noise component is also a valid synchronization signal, so that an incorrect driving signal as shown in FIG. 8B may be generated. Therefore, the user may not watch the 3D image smoothly due to the opening of the right eye glass part or the opening / closing operation of the left eye image on the image display device.

Thereafter, based on the first synchronization signal, a first driving signal for controlling the left and right eyeglasses is generated.

The first synchronizing signal may be a synchronizing signal at an earlier time point among the synchronizing signals, and more preferably, two first synchronizing signals 910 may be received as shown in FIG. 9 (a). As described above, the first synchronization signal has a low probability of introducing noise.

9B is a first driving signal generated based on the first synchronization signal. In accordance with the first driving signal, opening and closing operations of the left and right eyeglasses are performed.

According to an exemplary embodiment of the present invention, a method of operating a 3D image viewing apparatus includes generating a comparison signal based on the first driving signal (S630), receiving a second synchronization signal (S640), and comparing the second synchronization signal with the second synchronization signal. Generating a second driving signal based on the signal (S650).

The present invention constructs a feedback structure that can use the output of the control unit 520 as an input of the comparison signal unit 530 again, and then compares the received signals of the time points and generates driving signals, thereby interfering with the receivers of the plurality of transmitters. Since signal interference can be eliminated by a plurality of image display devices or electronic devices, the influence of external noise can be eliminated.

In some embodiments, the generating of the comparison signal (S630) may generate the comparison signal in the same form as the synchronization signal based on the period of the first driving signal. That is, the virtual synchronization signal as shown in FIG. 9C can be inversely calculated and generated based on the period of the drive signal in FIG. 9B.

In the generating of the second driving signal (S640), the second driving signal is compared with the comparison signal to generate a second driving signal as shown in FIG. 9 (d).

According to an exemplary embodiment, the generating of the comparison signal (S630) may include outputting the first driving signal itself of FIG. 9B as the comparison signal and generating the second driving signal (S640). The driving signal may be generated based on the second synchronization signal, and the second driving signal may be generated as a matched part compared with the comparison signal.

As shown in FIG. 9A, since the second synchronization signal 920 includes a noise component, the controller generates a driving signal similar to that of FIG. 8B and compares the comparison signal of FIG. 9B with the noise component. The second driving signal can be generated as a matching part.

The present invention contrasts a signal generated on the basis of an input signal or an input signal with a comparison signal, and outputs it as a driving signal when both are present. That is, the noise signal is present in the input signal but not in the comparison signal, so the noise is filtered out.

On the other hand, the operating method of the 3D image viewing apparatus according to an embodiment of the present invention may further comprise the step of periodically updating the comparison signal. In order to correct an error due to the passage of time of the comparison signal, the comparison signal may be newly generated and updated periodically, for example, every 1 second to several seconds.

The present invention uses the output of the control unit 520 generated from the stable synchronization signal again as an input of the comparison signal unit 530 and feeds back to the control unit 520 as a comparison signal. By comparing the received signal with a comparison signal and generating a driving signal, it is possible to exclude the interference of the receiver by a plurality of transmitters, thereby eliminating signal interference by a plurality of image display devices or electronic devices, and to reduce external noise. You can also eliminate the effect.

Therefore, according to the present invention, it is possible to prevent the signal interference and noise influence of the receiver of the 3D image viewing apparatus, to accurately receive the signal transmitted from the image display apparatus, and to more accurately and easily view the 3D image.

3D image viewing apparatus and its operation method according to the present invention is not limited to the configuration and method of the embodiments described as described above, the embodiments are all or all of the embodiments so that various modifications can be made Some may be optionally combined.

Meanwhile, the operating method of the 3D image viewing apparatus of the present invention may be embodied as processor readable codes on a processor readable recording medium included in the image display apparatus. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, 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. . The processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.

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.

100: video display device
170:
180: display
195: 3D video viewing device
200: remote control device

Claims (15)

A receiver which receives the first synchronization signal and the second synchronization signal;
A controller configured to generate a first driving signal based on the first synchronization signal;
Left and right eyeglasses that are opened and closed according to the first driving signal; And
And a comparison signal unit receiving the first driving signal and generating a comparison signal based on the first driving signal and outputting the comparison signal to the controller.
And the control unit generates a second driving signal based on the second synchronization signal and the comparison signal. The method of claim 1,
The comparison signal unit generates the comparison signal in the same form as the synchronization signal based on the period of the first driving signal,
And the control unit compares the second synchronization signal with the comparison signal to generate the second driving signal with a matched portion. The method of claim 1,
The comparison signal unit outputs the first driving signal as the comparison signal,
And the control unit generates a driving signal based on the second synchronization signal, compares the driving signal with the comparison signal, and generates the second driving signal with a matched portion. The method of claim 1,
The first synchronization signal is a 3D image viewing apparatus, characterized in that the first two received synchronization signal. The method of claim 1,
And the comparison signal unit periodically updates the comparison signal. The method of claim 1,
And the comparison signal unit is a variable crystal oscillator circuit (Vcxo). The method of claim 1,
And the left and right eyeglasses are opened and closed according to the second driving signal. The method of claim 1,
And the first and second synchronization signals are signals synchronized with an image displayed on the image display apparatus. Receiving a first synchronization signal;
Generating a first driving signal based on the first synchronization signal:
Generating a comparison signal based on the first driving signal;
Receiving a second synchronization signal; And
Generating a second driving signal based on the second synchronization signal and the comparison signal. 10. The method of claim 9,
The generating of the comparison signal may include generating the comparison signal in the same form as the synchronization signal based on the period of the first driving signal,
The generating of the second driving signal may include comparing the second synchronization signal and the comparison signal to generate the second driving signal with a matching portion. 10. The method of claim 9,
The generating of the comparison signal may include outputting the first driving signal as the comparison signal,
The generating of the second driving signal may include generating a driving signal based on the second synchronizing signal, comparing the comparison signal, and generating the second driving signal with a matching portion. How the device works. 10. The method of claim 9,
And the first synchronization signal is two synchronization signals received for the first time. 10. The method of claim 9,
Periodically updating the comparison signal; and operating the 3D image viewing apparatus. 10. The method of claim 9,
And opening and closing the left and right eyeglasses according to the second driving signal. 10. The method of claim 9,
And the first and second synchronization signals are signals synchronized with an image displayed on the image display apparatus.

Images