JP4982553B2 - Frame processing apparatus, television receiving apparatus and frame processing method - Google Patents

Description

  The present invention relates to a frame processing apparatus that processes an image frame, a television receiving apparatus equipped with the frame processing apparatus, and a frame processing method.

  There is known a television receiver having a stereoscopic image display function. Various mechanisms for realizing stereoscopic video have been proposed, and one of them is a display method for independently transmitting images that can be seen by the viewer's left and right eyes. Furthermore, this display method allows the viewer to display glasses whose left and right eye images are alternately displayed while changing the polarization plane on the display device, while the polarization plane is alternately switched in conjunction with this. The mechanism is such that the left and right eyes can see independent images.

  Here, by analyzing the received video data to determine whether the video data is compatible with the stereoscopic broadcasting system or the video data compatible with the normal broadcasting system, and using this determination result, which video data There has also been proposed a digital broadcast receiver or the like that can appropriately display an image on a monitor even when data is received (see, for example, Patent Document 1).

JP-A-10-257525

  By the way, when displaying the stereoscopic video as described above, it is important to display the left-eye image and the right-eye image alternately without mixing them. However, the image display on the display device generally updates (rewrites) the previously displayed image sequentially for each scanning line from the top to the bottom of the screen.

  Therefore, for example, at the timing of scanning near the center of the screen, there is a display state in which the upper half of the display screen is an image for the right eye and the lower half is an image for the left eye, and the viewer views this screen. It will appear as an image with a loss of stereoscopic effect.

  SUMMARY An advantage of some aspects of the invention is that it provides a frame processing device, a television receiving device, and a frame processing method capable of appropriately displaying a stereoscopic video.

In order to achieve the above object, a frame processing apparatus according to the present invention provides a first video signal corresponding to the first video signal from a stereoscopic video signal including first and second video signals for obtaining a three-dimensional video. A two-dimensional image including a first frame extraction unit for extracting one image frame and a second image frame corresponding to the second image signal, and a plurality of third image frames constituting a two-dimensional moving image A second frame extraction unit for sequentially extracting the third image frame from the signal; and a frame storage unit capable of storing the first to third image frames extracted by the first and second frame extraction units. When the one of the plurality of third image frames stored in the frame store, the relationship between the images before and after the frame, the interpolation frame used to increase the frame frequency raw form and around the Picture Means to insert between the frame overwrites the frame a plurality of times the second image frame of said first image frame stored in the storage unit is stored in the processing and the frame storage unit to overwrite multiple times A display rewriting unit that sequentially rewrites the display on the display screen by alternately repeating the process, and the display on the display screen is invalidated during the overwriting period of the first and second different image frames by the display rewriting unit. Means for enabling display on the display screen during an overwriting period between the same image frames , and the display rewriting unit sequentially extracts from the 2D video signal and The display on the display screen is rewritten with the plurality of third image frames and the interpolated frames stored in the storage unit .

  That is, according to the present invention, the display screen is in a non-display state during a period in which the first image frame is rewritten with the second image frame and a period in which the second image frame is rewritten with the first image frame. Is. In addition, the present invention displays the display screen during the period in which the first image frame is rewritten with the first image frame and the period in which the second image frame is rewritten with the second image frame. It is to make.

  Therefore, according to the present invention, the first image frame and the second image frame are prevented from being displayed in a mixed state even during the transition period of rewriting of the display screen. Can be displayed appropriately. Further, in the present invention, a television receiving device on which such a frame processing device is mounted can be configured.

The frame processing method according to the present invention includes a first image frame corresponding to the first video signal, and a first image frame corresponding to the first video signal, from a stereoscopic video signal including first and second video signals for obtaining a three-dimensional video. A first extraction step for extracting a second image frame corresponding to the second video signal; and the third image from a two-dimensional video signal including a plurality of third image frames constituting a two-dimensional moving image. A second extraction step for sequentially extracting frames, and a storage step for storing the first and second image frames extracted in the first or second extraction step, or the third image frame in a frame storage unit. When, among the third image frame of the plurality of which is stored in the frame storage unit, from the relationship between the images before and after the frame, it generates an interpolation frame to be used to increase the frame frequency A step to insert between the image frames before and after the above has been stored in the frame store in the first image frame is stored in the frame store at the storing step and a process of overwriting multiple times the storage step Sequentially rewriting the display on the display screen by alternately repeating the process of overwriting the second image frame a plurality of times; and on the display screen during the overwriting period of the first and second different image frames. The display on the display screen during the overwriting period between the same image frames, and the two-dimensional video signal sequentially extracted and stored in the frame storage unit It is characterized by a step of rewriting the display on the display screen in a plurality of the third image frame and the interpolation frame .

  ADVANTAGE OF THE INVENTION According to this invention, the frame processing apparatus, television receiver, and frame processing method which can display a stereo image appropriately can be provided.

The functional block diagram which shows the structure of the television receiver which mounts the frame process part which concerns on embodiment of this invention. The functional block diagram which shows the structure of the frame process part of FIG. The figure which shows typically the non-interlace conversion process by the right-and-left image separation circuit with which the frame process part of FIG. 2 was provided. The figure which shows typically the horizontal double expansion process by the right-and-left image separation circuit with which the frame process part of FIG. 2 was provided. The figure which shows typically the production | generation process of the interpolation frame by the frame interpolation circuit with which the frame process part of FIG. 2 was provided. The figure which shows typically the production | generation process of the frame group for left eyes by the frame group production | generation part with which the frame process part of FIG. 2 was provided. The figure which shows the transitional state in the middle of rewriting the image frame for left eyes displayed on the display screen of the television receiver of FIG. 1 to the image frame for right eyes. The figure which shows control with respect to the backlight of a video display by the display invalid part with which the frame process part of FIG. 2 was provided. The flowchart which shows the process by the frame process part of FIG. The figure which shows typically the production | generation process of the frame group for left eyes and right eyes different from FIG. 6 by a frame group production | generation part.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a functional block diagram showing a configuration of a television receiver 10 equipped with a frame processing unit (frame processing device) 50 according to an embodiment of the present invention.

  The television receiver 10 of this embodiment is a digital television broadcast receiver as shown in FIG. The television receiver (hereinafter referred to as “DTV device”) 10 includes a flat panel type video display 12 such as a surface-conduction electron-emitter display (SED) display panel or a liquid crystal display panel, a speaker 14, and an operation unit. 15 and a light receiving unit 18 that receives operation information transmitted from the remote controller 16 is provided in the cabinet. The video display 12 is a type of display device in which a display element receives a light supply from a light source for display, and includes a backlight 12a, a driver circuit 12b for driving the backlight 12a, and the like.

  Further, the DTV device 10 is detachable from a first memory card 19 such as an SD (Secure Digital) memory card, an MMC (Multimedia Card), and a memory stick. Recording and playback of information such as programs and photos are performed. Further, the DTV device 10 is detachable from, for example, a second memory card (IC card) 20 on which contract information and the like are recorded, and information is recorded on and reproduced from the second memory card 20. It is.

  The DTV apparatus 10 includes a first LAN (Local Area Network) terminal 21, a second LAN terminal 22, a USB (Universal Serial Bus) terminal 23, and an i. A LINK (registered trademark) terminal 24 is provided. Among these, the first LAN terminal 21 is used as a LAN-compatible HDD (Hard Disk Drive) dedicated port, and information on the connected LAN-compatible HDD, which is NAS (Network Attached Storage), is transmitted by Ethernet (registered trademark). It is used to record and play back.

  By providing the first LAN terminal 21 as a LAN-compatible HDD-dedicated port in this way, it is possible to stably record program information with high-definition image quality on the HDD without being affected by other network environments or network usage conditions. Can be done. The second LAN terminal 22 is used as a general LAN-compatible port using Ethernet (registered trademark). For example, via a hub, a LAN-compatible HDD and a PC (Personal Computer) HDD built-in DVD (Digital Versatile Disk) Used to connect devices such as recorders and to transmit information with these devices.

  The PC has a function to operate as a content server device in a home network, and further includes a UPnP (universal plug and play) service that provides URI (Uniform Resource Identifier) information necessary for content access. ) It can be used as a compatible device. In the DVD recorder, since digital information communicated via the second LAN terminal 22 is information only for the control system, in order to transmit analog video and audio information to and from the DTV device 10, It is necessary to provide a dedicated analog transmission line. Further, the second LAN terminal 22 enables connection to the Internet (network) via a router (broadband router) connected to a hub.

  The USB terminal 23 is used as a general USB-compatible port. For example, a USB device such as a mobile phone, a digital camera, a memory card, a card reader / writer, an HDD, and a keyboard is connected via a hub. And used for information transmission. i. The LINK (registered trademark) terminal 24 is used for serially connecting, for example, AV-HDD, D (Digital) -VHS (Video Home System), and the like, and performing information transmission with these devices.

  Here, the DTV apparatus 10 according to the present embodiment can receive BS / CS / terrestrial digital broadcasting and the like in digital television broadcasting (two-dimensional video broadcasting) and stereoscopic video broadcasting (digital stereoscopic broadcasting) described in detail later. . In addition, the DTV apparatus 10 receives broadcast waves in which two-dimensional or stereoscopic video data and audio data (and text information) are multiplexed via antennas 25 and 26 as shown in FIG. .

  Specifically, as shown in FIG. 1, in the DTV apparatus 10, the satellite digital television broadcast signal received by the antenna 25 for BS / CS digital broadcast reception is sent to the tuner for satellite digital broadcast via the input terminal 27. 27a. The tuner 27a selects a broadcast signal of a desired channel based on a control signal from the controller 30, and outputs the selected broadcast signal to a PSK (Phase Shift Keying) demodulator 27b.

  The PSK demodulator 27b demodulates the broadcast signal selected by the tuner 27a according to the control signal from the controller 30, obtains a transport stream including a desired program, and outputs the transport stream to the TS decoder 27c. The TS decoder 27c performs TS decoding processing on the signal multiplexed with the transport stream (TS) based on the control signal from the controller 30, and depackets the digital video signal and audio signal of the desired program. The obtained PES (Packetized Elementary Stream) is output to the STD buffer in the signal processing unit 31. Further, the TS decoder 27 c outputs the section information transmitted by digital broadcasting to the signal processing unit 31.

  On the other hand, the terrestrial digital television broadcast signal received by the terrestrial broadcast receiving antenna 26 is supplied to the terrestrial digital broadcast tuner 28 a via the input terminal 28. The tuner 28a selects a broadcast signal of a desired channel according to a control signal from the controller 30, and outputs the selected broadcast signal to an OFDM (Orthogonal Frequency Division Multiplexing) demodulator 28b. The OFDM demodulator 28b demodulates the broadcast signal selected by the tuner 28a based on the control signal from the controller 30, obtains a transport stream including a desired program, and outputs the transport stream to the TS decoder 28c.

  The TS decoder 28c performs TS decoding processing on the signal multiplexed with the transport stream (TS) based on the control signal from the controller 30 and depackets the digital video signal and audio signal of the desired program. The obtained PES is output to the STD buffer in the signal processing unit 31. Also, the TS decoder 28c outputs section information transmitted by digital broadcasting to the signal processing unit 31. The analog demodulator 28e demodulates the analog broadcast signal selected by the tuner 28d and outputs the demodulated signal to the signal processing unit 31. Further, the PSK demodulator 27b or the OFDM demodulator 28b demodulates the broadcast wave of the stereoscopic video selected by the tuner 27a or the tuner 28a, and the TS decoder 27c or the TS decoder 28c further demodulates the demodulated stereoscopic video. Are decoded and output to the signal processing unit 31.

  Here, the signal processing unit 31 selectively performs predetermined digital signal processing on the digital video signal and audio signal respectively supplied from the TS decoder 27c and the TS decoder 28c when watching TV, The data is output to the graphic processing unit 32 and the audio processing unit 33. Further, the signal processing unit 31 selects a content reproduction signal input from the controller 30 when reproducing content other than television broadcasting, performs predetermined digital signal processing, and sends it to the graphic processing unit 32 and the audio processing unit 33. Output.

  The signal processing unit 31 also includes various data for obtaining a program, electronic program guide (EPG) information, program attribute information (program genre, etc.) from the section information input from the TS decoder 27c (28c). Subtitle information (service information, SI and PSI) is output to the controller 30. The controller 30 including the ROM 30a, the RAM 30b, the nonvolatile memory 30c, and the like performs image generation processing for displaying EPG and subtitles from these input information, and outputs the generated image information to the graphic processing unit 32.

  The graphic processing unit 32 includes a frame rate conversion circuit 59 described in detail later. In addition, the DTV apparatus 10 of this embodiment includes a frame synchronization signal generation circuit 36, and gives a timing when the frame rate conversion circuit 59 generates an image frame. The graphic processing unit 32 includes a digital video signal supplied from an AV decoder in the signal processing unit 31, an OSD signal generated by an OSD (On Screen Display) signal generation unit 34, image data by data broadcasting, a controller 30 has a function of synthesizing the EPG generated by 30 and the caption signal and outputting them to the video processing unit 35. In addition, when displaying a caption by caption broadcasting, the graphic processing unit 32 performs a process of superimposing caption information on a video signal based on control from the controller 30.

  The digital video signal output from the graphic processing unit 32 is supplied to the video processing unit 35. The video processing unit 35 converts the input digital video signal into an analog video signal in a format that can be displayed on the video display 12 and then outputs the analog video signal to the video display 12 to display the video. 38 to the outside. The audio processing unit 33 converts the input digital audio signal into an analog audio signal in a format that can be reproduced by the speaker 14 and then outputs the analog audio signal to the speaker 14 to reproduce the audio. 37 to the outside.

  Here, in the DTV device 10, all the operations including the above-described various reception operations are comprehensively controlled by the controller 30. The controller 30 includes a CPU (Central Processing Unit) and the like, receives operation information from the operation unit 15 or receives operation information sent from the remote controller 16 via the light receiving unit 18, Each unit is controlled so that the operation content is reflected. In this case, the controller 30 mainly includes a ROM (Read Only Memory) 30a storing a control program executed by the CPU, a RAM (Random Access Memory) 30b providing a work area to the CPU, various setting information and control. A nonvolatile memory 30c in which information and the like are stored is used.

  Further, the controller 30 is connected to a card holder 40 in which the first memory card 19 can be mounted via a card I / F (Interface) 41. As a result, the controller 30 can transmit information to the first memory card 19 attached to the card holder 40 via the card I / F 41. Furthermore, the controller 30 is connected to a card holder 42 into which the second memory card 20 can be mounted via the card I / F 43. Thereby, the controller 30 can transmit information to the second memory card 20 mounted on the card holder 42 via the card I / F 43.

  The controller 30 is connected to the first LAN terminal 21 via the communication I / F 45. Thereby, the controller 30 can transmit information to the LAN-compatible HDD 25 connected to the first LAN terminal 21 via the communication I / F 45. In this case, the controller 30 has a DHCP (Dynamic Host Configuration Protocol) server function, and performs control by assigning an IP (Internet Protocol) address to the LAN-compatible HDD 25 connected to the first LAN terminal 21. Furthermore, the controller 30 is connected to the second LAN terminal 22 via the communication I / F 46. Thereby, as shown in FIG. 3, the controller 30 can transmit information to each device connected to the second LAN terminal 22 via the communication I / F 46.

  The controller 30 is connected to the USB terminal 23 via the USB I / F 47. As a result, the controller 30 transmits information to each device connected to the USB terminal 23 via the USB I / F 47. Further, the controller 30 is configured to i. Via the LINK® I / F 48 i. A LINK (registered trademark) terminal 24 is connected. As a result, the controller 30 makes the i. Each device connected to the LINK (registered trademark) terminal 24; i. Information can be transmitted via the LINK (registered trademark) I / F 48.

  Next, the configuration of the frame processing unit 50 according to the present embodiment will be described based on FIGS. 2 to 8 in addition to FIG. 1 described above. Here, FIG. 2 is a functional block diagram showing a configuration of the frame processing unit 50. FIG. 3 is a diagram schematically showing non-interlace conversion processing by the left and right image separation circuit 53a of the frame extraction unit 53. Further, FIG. 4 is a diagram schematically illustrating horizontal double expansion processing by the left and right image separation circuit 53a, and FIG. 5 is a schematic diagram of interpolation frame generation processing by the frame interpolation circuit 57a of the frame group generation unit 57. FIG. FIG. 6 is a diagram schematically showing the left eye and right eye frame group generation processing by the frame group generation unit 55, and FIG. 7 shows the left eye image frame displayed on the display screen 12c for the right eye. It is a figure which shows the transitional state in the middle of rewriting to the image frame of. Further, FIG. 8 is a diagram showing the control of the backlight 12 a of the video display 12 by the display invalidation unit 61.

  In the DTV device 10 including the frame processing unit 50, when a stereoscopic video broadcast is received, the video display 12 roughly switches between a left-eye image and a right-eye image every 1/240 sec. While displaying, on the other hand, the viewer wears the stereoscopic video viewing glasses 62 shown in FIG. 2 in which the transmission / non-transmission of the right-eye and left-eye images is alternately switched. (Stereoscopic images) can be viewed.

  That is, as shown in FIG. 2, the frame processing unit 50 includes a signal input circuit 51 having a signal discrimination circuit 52, a frame extraction unit 53 having a left / right image separation circuit 53a and a selection circuit 53b, and a frame extraction having a frame delay circuit 56a. 56, a frame group generation unit 55 having a frame storage unit 55a, a frame group generation unit 57 having a frame interpolation circuit 57a, a switching circuit 58, a video processing unit 35 having a video signal output unit 35a, and a display invalidation unit 61. Prepare. Further, the frame processing unit 50 is provided with a glasses switching unit 60 connected to the stereoscopic image viewing glasses 62 and the like. A frame synchronization signal generated by the frame synchronization signal generation circuit 36 is input to the frame rate conversion circuit 59 of the frame processing unit 50.

  The signal input circuit 51 that functions as a signal input unit is a type of input video signal, that is, a stereoscopic video signal in which a video signal for the left eye and a video signal for the right eye are multiplexed, or a two-dimensional video. It is determined whether it is a normal two-dimensional video signal to be represented. Here, the signal input circuit 51 having the signal discriminating circuit 52 is configured with an HDMI (High-Definition Multimedia Interface) receiver as its input interface. Accordingly, the type of the input video signal can be obtained by extracting the type of the input video signal by the signal discrimination circuit 52 at the time of connection authentication. Further, the signal determination circuit 52 can determine the type of the video signal based on information described in the header of the data stream obtained by the TS decoder 27c or the TS decoder 28c.

  Here, in the case of a stereoscopic video signal, there are various encoding methods. For example, as shown in FIG. 3, there is an image frame E3 in which image data L for the left eye and image data R for the right eye are alternately multiplexed for each scanning line. As shown in FIG. 4, there is also an image frame E1 (E2) having left-eye image data L in the left half and right-eye image data R in the right half. It is possible to know that such an encoded signal is also a stereoscopic video signal through connection authentication, header information, and the like.

  When the signal discrimination circuit 52 determines that the 2D video signal is input by the signal input circuit 51, the frame extraction unit (second frame extraction unit) 56 receives the input as shown in FIG. Image frames F1, F2,... For 2D video are sequentially extracted from the 2D video signal. As shown in FIG. 5, the frame delay circuit 56a obtains an image frame F2 that is one frame after the target image frame F1, and the frame F1 of the current image and the delayed image frame F2 as shown in FIG. The frame group generation unit (second frame group generation unit) 57 sends it to the frame interpolation circuit 57a. Alternatively, the frame storage unit 55a in the frame group generation unit 55 acquires the frame F1 of the current image and the delayed image frame F2 (as indicated by the broken arrow line in FIG. 2). The acquired image frames F1 and F2 may be sent from the frame storage unit 55a to the frame group generation unit 57 side. Thereby, the storage area in the frame storage unit 55a included in the frame group generation unit 55 can be effectively utilized (shared).

  As shown in FIG. 5, the frame interpolation circuit 57 a of the frame group generation unit 57 includes a plurality of two-dimensional video image frames F1, F2,. An interpolated frame D2 corresponding to an intermediate transitional moving image predicted based on the relationship between the image frames F1 and F2 (for example, predicted based on the result of motion detection) is generated. Further, as shown in FIG. 5, the frame interpolation circuit 57a generates an interpolation frame D1 based on the image frame F1 and the generated interpolation frame D2. Further, the frame interpolation circuit 57a generates an interpolation frame D3 based on the interpolation frame D2 and the image frame F2, as shown in FIG. In this way, by increasing the number of image frames, even a two-dimensional moving image with intense movement such as sports can be displayed well.

  As shown in FIG. 2, when the signal discrimination circuit 52 determines that the two-dimensional video signal has been input by the signal input circuit 51, the switching circuit 58 starts from the frame group generation unit 57 having the frame interpolation circuit 57a. Select the output. Further, the switching circuit 58 selects the output from the frame group generation unit 55 when the signal determination circuit 52 determines that the stereoscopic video signal is input by the signal input circuit 51. Further, the operation of the display invalidating unit 61 is turned on / off (executed / stopped) according to the output of the signal discriminating circuit 52. That is, when the signal discriminating circuit 52 discriminates the input of the stereoscopic video signal, the operation of the display invalidating unit 61 is controlled to the execution state, whereas when the signal discriminating circuit 52 discriminates the input of the two-dimensional video signal, the display invalidating unit 61 The operation of the unit 61 is controlled to be stopped.

  As shown in FIG. 6, the frame extraction unit 53 generates a left-eye image from a stereoscopic video signal obtained by multiplexing a left-eye video signal and a right-eye video signal, that is, multiplexed image frames E1 and E2. The frames L1, L2, L3, L4... And the right-eye image frames R1, R2, R3, R4. The left and right image separation circuit 53a of the frame extracting unit 53 extracts the image frame for the left eye and the image frame for the right eye over 1/60 sec, and stores them in a work memory for temporarily storing frames.

  Specifically, the frame extraction unit 53 controls the left and right image separation circuit 53a and generates the frame synchronization signal generation circuit 36 when the stereoscopic video signal is composed of the image frame E3 illustrated in FIG. As shown in FIG. 3, the interlace / progressive (non-interlace) conversion is performed while causing the selection circuit 53b to acquire the 60 Hz synchronization signal, and the right-eye image frame L1 and the right-eye image frame R1 are extracted.

  Further, when the stereoscopic video signal is composed of the image frame E1 (E2) 3 illustrated in FIG. 4, the frame extraction unit 53 controls the left and right image separation circuit 53 a and the selection circuit 53 b as well as 60 Hz. The synchronization signal is acquired from the frame synchronization signal generation circuit 36, and as shown in FIG. 4, the left image data L is extracted from the right image data R, and the image data L and R are doubled in the horizontal direction. While performing the horizontal double expansion process, the right-eye image frame L1 and the right-eye image frame R1 are extracted.

  As shown in FIG. 6, the frame group generation unit 55 uses a plurality of left-eye image frames L1 and L2 (L3 and L4) based on the left-eye and right-eye image frames sequentially extracted by the frame extraction unit 53. The left-eye frame group L11 (L12) in which are arranged and the right-eye frame group R11 (R12) in which a plurality of right-eye image frames R1, R2 (R3, R4) are arranged are alternately generated. Specifically, the frame group generation unit 55 individually copies, for example, image frames L1 and R1 for the left eye and right eye extracted by the frame extraction unit 53 to generate interpolation frames L2 and R2, respectively. The interpolated frames L2 and R2 and the original image frames L1 and R1 are arranged to generate the left eye frame group L11 and the right eye frame group R11. Thus, individual image frames are sequentially generated at a frame rate 1/240 (f / s) that is four times 1/60 (f / s). The frame storage unit 55a sequentially stores the left-eye frame group L11 (L12) and the right-eye frame group R11 (R12) that are alternately generated by the frame group generation unit 55.

  Here, the stereoscopic image viewing glasses 62 include, for example, a so-called liquid crystal shutter that alternately switches between transmission and non-transmission of images on the left eye side and the right eye side. The stereoscopic video viewing glasses 62 are switched every 1/240 sec so as to synchronize with the switching control signal output from the glasses switching unit 60, that is, the rewrite start timing of the left-eye and right-eye image frames on the display screen 12c. The transmission / non-transmission between the left eye side and the right eye side is switched.

  The video processing unit 35 includes a video signal output unit 35a. The video signal output unit 35a outputs a video signal corresponding to the image frame extracted from the frame storage unit 55a to the video display 12 side having the display screen 12c. The display image can be updated by driving with a video signal. That is, the video processing unit 35 functioning as a display rewriting unit extracts image frames one by one in the storage order from the left-eye frame group L11 (L12) and the right-eye frame group R11 (R12) stored in the frame storage unit 55a. Then, the display on the display screen is sequentially rewritten with the extracted image frames (in the order of image frames L1, L2, R1, R2, L3, L4, R3, R4...).

  More specifically, as shown in FIGS. 7 and 8, the video processing unit 35 sequentially updates the display image from the top to the bottom of the display screen 12c. For example, the image frame R1 for the right eye is written from top to bottom. In the period of 1/240 sec, the image frame L2 for the left eye that has been displayed before is rewritten (updated) sequentially from the top to the image frame R1 for the right eye. The period of 1/240 s is a period in which the image frame L2 for the left eye and the image frame R1 for the right eye are mixedly displayed.

Here, as shown in FIGS. 1 and 2, the display invalidation unit 61 is such that the video processing unit 35 functioning as a display rewriting unit converts the left-eye image frame L2 (L4) into the right-eye image frame R1 (R3). The display on the display screen 12c is invalidated in the first period for rewriting in the first period and in the second period for rewriting the image frame R2 for the right eye with the image frame L3 for the left eye. Specifically, as shown in FIGS. 1 and 2, the display invalidation unit 61 controls the driver circuit 12b so as to stop the light emission of the backlight 12a during the first and second periods. In place of this, the display invalidation unit 61 displays a video signal (for example, a video signal in which the luminance component is set to 0) that is in a non-display state on the display screen 12c in the first and second periods, The signal is output from the signal output unit 35a.

  That is, the display invalidation unit 61 hides the display screen 12c during the rewriting period of the left-eye to right-eye and right-eye to left-eye image frames, while the left-eye (right-eye) image frame is displayed as the next left-eye image frame. The display screen 12c is selectively brought into the display state only during the period of rewriting with the image frame for right (for the right eye). As a result, it is possible to prevent the display of an image with a reduced stereoscopic effect.

Next, processing by the frame processing unit 50 configured as described above will be described with reference to a flowchart shown in FIG.
As shown in FIG. 9, first, when the signal input circuit 51 inputs a video signal (S1), the signal discrimination circuit 52 discriminates between a stereoscopic video signal and a two-dimensional video signal (S2). If it is not a stereoscopic video signal (NO in S2) but a 2D video signal, the frame extraction unit 56 sequentially extracts 2D video frames F1, F2,... As shown in FIG. . Next, the frame interpolation circuit 57a of the frame group generation unit 57 generates interpolation frames D1 to D3 predicted from the relationship between the previous and next image frames F1 and F2 (S4). Next, the video processing unit 35 outputs a video signal corresponding to each image frame from the video signal output unit 35a, and sequentially rewrites the display screen 12c with a 2D video frame including an interpolation frame (S5). .

  On the other hand, when the video signal input to the signal input circuit 51 is a stereoscopic video signal (YES in S2), the frame extraction unit 56, as shown in FIG. 6, the image frames L1, L3 for the left eye, Image frames R1 and R3 are sequentially extracted (S6). Subsequently, the frame group generation unit 55 arranges a plurality of left-eye image frames L1 and L2 (L3 and L4) based on the sequentially extracted left-eye and right-eye image frames. L12) and a right-eye frame group R11 (R12) in which a plurality of right-eye image frames R1, R2 (R3, R4) are arranged are alternately generated (S7).

  Next, the frame storage unit 55a sequentially stores the left-eye frame group L11 (L12) and the right-eye frame group R11 (R12) that are alternately generated by the frame group generation unit 55 (S8). Next, the video processing unit 35 extracts image frames one by one from the left-eye frame group and the right-eye frame group in order, and outputs a video signal corresponding to the extracted image frame from the video signal output unit 35a to display the display screen 12c. Are sequentially rewritten (S9). Further, the display invalidation unit 61 disables the display on the display screen 12c, for example, by turning off the backlight 12a during the rewriting period of the left-eye to right-eye and right-eye to left-eye image frames (S10).

  As described above, the DTV apparatus 10 including the frame processing unit 50 according to the present embodiment is a period in which the left-eye image frame is rewritten with the right-eye image frame, and the right-eye image frame is used for the left-eye. The display screen 12c is in a non-display state during the period of rewriting with the image frame. That is, the DTV device 10 displays the display screen 12c only during a period in which the left-eye image frame is rewritten with the next left-eye image frame and only in a period in which the right-eye image frame is rewritten with the next right-eye image frame. Is selectively displayed. Therefore, according to the DTV device 10, even when the display screen is in a transitional period, the left-eye image frame and the right-eye image frame are prevented from being mixedly displayed. It is possible to display the video appropriately. Further, in the DTV device 10 of the present embodiment, in a two-dimensional image, the number of moving picture frames is increased by creating an interpolation frame, and the viewer can view an image with less afterimage effect.

  Although the present invention has been specifically described above with reference to the embodiment, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example of outputting at 4 times the original frame frequency has been shown. However, as shown in FIG. 10, n times (multiplication) such as 6 times, 8 times, 10 times, and 12 times may be used. . In the case of stereoscopic video, the same image is output n / 2 times. In the case of 2D video, n-1 interpolation frames are created and output. As shown in FIG. 10, even in the case of a stereoscopic video, interpolation frames L3 and R3 predicted from the relationship between the previous and subsequent image frames may be created.

  DESCRIPTION OF SYMBOLS 10 ... Television receiver, 12 ... Video display device, 12a ... Backlight, 12a ... Display screen, 35 ... Video processing part, 35a ... Video signal output part, 50 ... Frame processing part, 51 ... Signal input circuit, 52 ... Signal discriminating circuit, 53, 56... Frame extraction unit, 55, 57... Frame group generation unit, 55a... Frame storage unit, 61.

Claims (6)

From a stereoscopic video signal including first and second video signals for obtaining a three-dimensional video, a first image frame corresponding to the first video signal and a second corresponding to the second video signal. A first frame extraction unit for extracting an image frame;
A second frame extraction unit for sequentially extracting the third image frames from a two-dimensional video signal including a plurality of third image frames constituting a two-dimensional moving image;
A frame storage unit capable of storing the first to third image frames extracted by the first and second frame extraction units;
The frame store of the plurality stored in one of the third image frame, from the relation between the images before and after the frame, the image frame before and after the interpolation frame forms raw used to increase the frame frequency and the means to be inserted between,
Display screen by alternately repeating the process of overwriting the first image frame stored in the frame storage unit a plurality of times and the process of overwriting the second image frame stored in the frame storage unit a plurality of times A display rewriting unit for sequentially rewriting the above display;
While the display rewriting unit invalidates the display on the display screen during the overwriting period of the first and second different image frames, the display on the display screen is displayed during the overwriting period between the same image frames. Means for enabling ,
Further, the display rewriting unit rewrites the display on the display screen with the plurality of third image frames and the interpolated frames that are sequentially extracted from the 2D video signal and stored in the frame storage unit. ,
Frame processing apparatus according to claim. The display screen is a screen of a display device of a type in which a display element performs display by receiving supply of light from a light source,
Further, the means for invalidating / validating the display on the display screen includes a period during which the display rewriting unit overwrites the first image frame with the second image frame, and the second image frame. The frame processing device according to claim 1, further comprising: a display invalidation unit that stops light emission of the light source during a period in which the first image frame is overwritten. A signal input unit capable of inputting the two-dimensional video signal and the stereoscopic video signal; and a signal determination unit that determines the stereoscopic video signal and the two-dimensional video signal input by the signal input unit;
The frame processing apparatus according to claim 1, further comprising:   A television receiver comprising the frame processing device according to any one of claims 1 to 3. A frame extraction unit that sequentially extracts a left-eye image frame and a right-eye image frame from a stereoscopic video signal including a left-eye video signal and a right-eye video signal;
Based on the left-eye and right-eye image frames sequentially extracted by the frame extraction unit, new left-eye and right-eye image frames are generated, and the generated left-eye image frame and the extracted left-eye image are generated. The left-eye frame group in which the image frames for the left eye are successively arranged, and the right-eye frame group in which the generated right-eye image frame and the extracted right-eye image frame are successively arranged are alternately generated. A frame group generation unit to perform,
The picture frame group frames group and before Symbol right eye left eye are sequentially and frame storage unit to be overwritten,
An image frame group of the image frame group and the right eye for the eye that is stored in the frame store, call the stored order, and the information rewriting unit 130 sequentially rewrites the display on the front示画surface,
The display rewriting unit overwrites the next left-eye image frame on the display screen with respect to the left-eye image frame, and the next right-eye image frame with respect to the right-eye image frame . Means for displaying an image on the display screen during a period of overwriting on the display screen;
Two-dimensional image and two-dimensional image signal representing the the stereoscopic video signal and the input signals that can be input respectively,
A signal discriminating unit for discriminating between the stereoscopic video signal and the two-dimensional video signal input by the signal input unit;
A second frame for sequentially extracting image frames for 2D video from the input 2D video signal when the signal determination unit determines that the 2D video signal has been input by the signal input unit; An extractor;
Among the image frames for a plurality of the two-dimensional image to be sequentially extracted by the second frame extracting unit, regardless of whether these before and after the image frame, an interpolation frame to be used to increase the frame frequency generate and further comprising a second frame group generating unit to be inserted between the image frames before and after the,
The frame storage unit sequentially stores the image frames for the 2D video extracted by the second frame extraction unit;
The second frame group generation unit generates the interpolated frame based on the image frames for 2D video sequentially stored in the frame storage unit ,
The display rewriting unit rewrites the display on the display screen with the plurality of image frames for 2D video and the interpolated frames extracted from the 2D video signal and sequentially stored in the frame storage unit. ,
Frame processor said. From a stereoscopic video signal including first and second video signals for obtaining a three-dimensional video, a first image frame corresponding to the first video signal and a second corresponding to the second video signal. A first extraction step of extracting image frames;
A second extraction step of sequentially extracting the third image frame from a two-dimensional video signal including a plurality of third image frames constituting a two-dimensional moving image;
A storage step of storing the first and second image frames extracted in the first or second extraction step, or the third image frame in a frame storage unit;
The frame memory unit has been stored in the plurality of third image frames, from the relation between the images before and after the frame, the image frame before and after the interpolation frame forms raw used to increase the frame frequency and the step to be inserted between,
A process of overwriting the first image frame stored in the frame storage unit in the storage step a plurality of times and a process of overwriting the second image frame stored in the frame storage unit in the storage step a plurality of times. Sequentially rewriting the display on the display screen by repeating alternately;
Invalidating the display on the display screen during the overwriting period of the first and second different image frames, while validating the display on the display screen during the overwriting period between the same image frames ; ,
Rewriting the display on the display screen with the plurality of third image frames and the interpolated frames that are sequentially extracted from the 2D video signal and stored in the frame storage unit;
Frame processing method characterized by having a.

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