WO2012042575A1 - Glasses for viewing 3d video - Google Patents

Glasses for viewing 3d video Download PDF

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Publication number
WO2012042575A1
WO2012042575A1 PCT/JP2010/005896 JP2010005896W WO2012042575A1 WO 2012042575 A1 WO2012042575 A1 WO 2012042575A1 JP 2010005896 W JP2010005896 W JP 2010005896W WO 2012042575 A1 WO2012042575 A1 WO 2012042575A1
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WO
WIPO (PCT)
Prior art keywords
signal
unit
command
period
reception interval
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Application number
PCT/JP2010/005896
Other languages
French (fr)
Japanese (ja)
Inventor
三原　和博
誠司 中沢
三谷　浩
賀津雄 西郷
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to DE212010000155U priority Critical patent/DE212010000155U1/en
Priority to CN2010900007010U priority patent/CN202514019U/en
Priority to PCT/JP2010/005896 priority patent/WO2012042575A1/en
Priority to FR1158455A priority patent/FR2965694B3/en
Publication of WO2012042575A1 publication Critical patent/WO2012042575A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2213/00—Details of stereoscopic systems
    • H04N2213/008—Aspects relating to glasses for viewing stereoscopic images

Definitions

  • the present invention relates to stereoscopic video viewing glasses for receiving a synchronization signal transmitted from a stereoscopic video display device that displays a stereoscopic video and allowing a viewer to view the stereoscopic video and a control method thereof.
  • a display device that alternately displays images from the viewpoints of the left and right eyes constituting a stereoscopic image, and a viewer in synchronization with the display of the images from the left and right viewpoints of the display device.
  • a stereoscopic video system that allows a viewer to view a stereoscopic video by using video viewing glasses that open and close a shutter provided in front of the left and right eyes (for example, Patent Document 1).
  • the stereoscopic image viewing glasses When transmitting a synchronization signal from the stereoscopic image display device to the stereoscopic image viewing glasses, if transmission is performed by wireless communication using wireless or infrared rays, the stereoscopic image viewing glasses have noise other than the synchronization signal, for example, background noise ( It signals such as background noise) and other equipment emitted, also receives. The control of the stereoscopic video viewing glasses may be disturbed by these noises.
  • background noise It signals such as background noise
  • the invention of the present application aims to reduce the influence of these noises on the glasses for viewing stereoscopic images.
  • the stereoscopic video viewing glasses calculate a period of a signal received from the outside, determine a valid signal according to the calculated period, and the effective reception from the signal received from the outside
  • An effective command extraction unit that extracts only a simple signal, a filter control unit that controls a left eye filter unit and a right eye filter unit that adjust the amount of light incident on the left and right eyes of the viewer according to the extracted command, Is provided.
  • FIG. 1 is a configuration diagram of a stereoscopic video system including a stereoscopic video display device and stereoscopic video viewing glasses described in the present embodiment.
  • FIG. It is a hardware block diagram of the glasses for stereoscopic video viewing described in the present embodiment.
  • FIG. 3 is a functional configuration diagram of stereoscopic video viewing glasses described in the present embodiment. It is a figure which shows the receiving timing of each signal which the spectacles for stereoscopic video viewing and reception and each receiving interval. It is a figure which shows the minimum reception interval, the maximum reception interval, and an average period of the received signal demonstrated in this Embodiment. Is a diagram showing the grouping of the reception signal described in this embodiment.
  • FIG. 1 is a diagram showing a video display system including a video display device 100 that displays a stereoscopic video, and video viewing glasses 150 that a viewer wears when viewing the stereoscopic video displayed by the video display device 100. It is.
  • the display unit 110 is a part that displays a video that the video display device 100 displays to the viewer.
  • the left-eye image and the right-eye image are displayed alternately on the time axis or by switching at regular intervals.
  • the synchronization signal transmission unit 120 transmits a synchronization signal synchronized with the stereoscopic video displayed on the display unit 110 to the outside, particularly to the video viewing glasses 150.
  • a synchronization signal synchronized with the stereoscopic video displayed on the display unit 110 to the outside, particularly to the video viewing glasses 150.
  • the video viewing glasses 150 include a right eye optical filter unit 160, a left eye optical filter unit 170, and a synchronization signal receiving unit 180.
  • the right eye optical filter unit 160 controls the light incident on the right eye of the viewer wearing the video viewing glasses 150. More specifically, the amount of light incident on the right eye by the image displayed on the display unit 110 of the image display device 100 or the characteristics of the light is adjusted or changed.
  • the left eye optical filter unit 170 controls the light incident on the left eye in the same manner as the right eye optical filter unit 160.
  • the synchronization signal receiving unit 180 receives the synchronization signal transmitted from the synchronization signal transmitting unit 120 of the video display device 100.
  • the video display system links the above configuration to allow viewers to view stereoscopic video.
  • a stereoscopic video is displayed at a speed of 120 Hz, for example, a left-eye video and a right-eye video are alternately displayed or switched at regular intervals.
  • the synchronization signal transmission unit 120 transmits a synchronization signal synchronized with the switching between the left-eye video and the right-eye video displayed on the display unit 110.
  • the video viewing glasses 150 receive the synchronization signal output from the synchronization signal transmission unit 120 of the video display device 100 by the synchronization signal reception unit 180.
  • the video viewing glasses 150 control the left eye optical filter unit 170 and the right eye optical filter unit 160 based on the received synchronization signal, so that the left viewer of the viewer wearing the video viewing glasses 150 eye, the light quantity incident on the right eye, or to control the optical characteristics. For example, when a synchronization signal indicating that a left-eye image is displayed on the display unit 110 of the image display device is received, the left-eye optical filter unit 170 is controlled to increase the amount of light incident on the left eye.
  • the right-eye optical filter unit 160 reduces the amount of light incident on the right eye.
  • the viewer views the left-eye video displayed on the display unit 110 with the left eye and does not view with the right eye.
  • the left-eye optical filter unit 170 reduces the amount of light incident on the left eye, and the right-eye optics.
  • filter unit 160 increases the amount of light entering the right eye.
  • the video for the right eye displayed on the display unit 110 is viewed with the viewer's right eye and not viewed with the left eye.
  • the viewer displays the video displayed on the display unit 110. Perceived to have parallax. As a result, even if the display unit 110 is a display device having a substantially planar shape, the viewer can feel that the video displayed there is three-dimensional.
  • FIG. 2 is a diagram illustrating a hardware configuration of the video viewing glasses 150.
  • the eyeglasses for viewing video 150 have, as hardware configurations, an infrared light receiving sensor (IR sensor) 201, an amplifier 202, an LED 203, a CPU 204, a switch (SW) 205, a ROM 206, a RAM 207, and a clock (CLK) 208.
  • IR sensor infrared light receiving sensor
  • SW switch
  • ROM 206 read-only memory
  • RAM 207 a read-only memory
  • CLK clock
  • the IR sensor 201 is a sensor that receives a synchronization signal transmitted from the stereoscopic video display device 100.
  • the IR sensor 201 converts the received infrared light into an electrical signal.
  • the synchronization signal is described as being propagated by infrared rays, but the present invention is not limited to this. Other methods may be used as long as the synchronization signal is propagated by a wireless method such as radio.
  • the amplifier 202 appropriately amplifies the electric signal so that the electric signal output from the IR sensor 201 can be easily processed by a subsequent processing block.
  • the LED 203 is lit to clearly indicate the operation contents to the user when the stereoscopic video viewing glasses 150 are operating or when the switch 205 is input and the power is turned on.
  • the CPU 204 controls the whole of the stereoscopic video viewing glasses 150.
  • a CPU is described as an example, but a similar process may be performed by a DSP, FPGA, or the like.
  • the switch (SW) 205 is an interface for realizing input to the stereoscopic video viewing glasses 150 from the outside.
  • the ROM 206 holds programs for operating the CPU 204 and the like, operation parameters, initial values, and the like.
  • the ROM 206 may use a rewritable flash memory or the like.
  • the RAM 207 holds variable values and the like temporarily held by the CPU 204 program during operation.
  • the clock (CLK) 208 oscillates a reference clock for operating the CPU 204 and other hardware components.
  • the analog switches 209 and 211 perform a driving process for driving an opening / closing operation of shutters 210 and 212 described later.
  • the two analog switches 209 and 211 are provided because they are necessary to drive the left and right eye shutters 210 and 212, respectively.
  • the shutters 210 and 212 are provided in front of the left and right eyes of the viewer, and are opened and closed in synchronization with the video displayed by the stereoscopic video display device 100.
  • FIG. 3 is a diagram illustrating a functional configuration of the stereoscopic video viewing glasses 150.
  • the stereoscopic video viewing glasses 150 have a functional configuration such as a reception unit 301, an amplification unit 302, a display unit 303, a calculation unit 304, an input unit 305, a memory unit 306, a reference signal generation unit 307, and a drive.
  • the receiving unit 301 receives a synchronization signal transmitted from the stereoscopic video display device 100.
  • the receiving unit 301 corresponds to the IR sensor 201 in FIG.
  • the amplifying unit 302 amplifies the signal received by the receiving unit 301.
  • the amplification unit 302 corresponds to the amplifier 202 in FIG.
  • the display unit 303 displays various information to the user by the stereoscopic video viewing glasses 150.
  • the display unit 303 corresponds to the LED 203 in FIG. 2, but the display method is not limited to the LED. Any realization method may be used as long as information is displayed to the user by other methods.
  • the calculation unit 304 performs overall control of the stereoscopic video viewing glasses 150.
  • the calculation unit 304 corresponds to the CPU 204 in FIG.
  • the input unit 305 receives various instructions from the user.
  • the input unit 305 corresponds to the switch 205 in FIG.
  • the memory unit 306 holds various types of information permanently or temporarily.
  • the memory unit 306 corresponds to the ROM 206 and the RAM 207 in FIG.
  • the reference signal generation unit 307 generates a reference signal necessary for the operation of the arithmetic unit 304 or the like.
  • the reference signal generation unit 307 corresponds to the clock 208 in FIG.
  • the driving unit 308 generates and outputs a signal for operating a shutter of the left eye filter unit 309 and the right eye filter unit 310 described later.
  • the filter driving unit 308 corresponds to the analog switches 209 and 211 in FIG.
  • the left eye filter unit 309 and the right eye filter unit 310 control the amount of light incident on the left and right eyes of the viewer.
  • the left eye filter unit 309 and the right eye filter unit 310 correspond to the shutters 210 and 212 in FIG.
  • the calculation unit 304 further includes an input switching unit 311, a command reception interval calculation unit 312, a valid command extraction unit 313, and a filter control unit 314.
  • the input switching unit 311 controls whether the arithmetic unit 304 accepts the synchronization signal input from the receiving unit 301 and the amplifying unit 302.
  • the input switching unit 311 corresponds to, for example, validity / invalidity of the input port in the CPU 204 in FIG.
  • the command reception interval calculation unit 312 calculates reception periods of various signals received by the reception unit 301 and the like, and distinguishes between a valid command and other signals (noise) and the like by a reception command grouping process or the like. Will be described later distinguish how the effective command and other signals.
  • the valid command extraction unit 313 calculates reception periods of various signals by the command reception interval calculation unit 312 and extracts commands that are distinguished as valid from the actual received commands. Only the command extracted from the received signal by the valid command extraction unit 313 is output to the filter control unit described later.
  • the filter control unit 314 controls opening and closing of the left eye filter unit 309 and the right eye filter unit 310 via the drive unit 308 in accordance with the command extracted by the valid command extraction unit 313.
  • FIG. 4 is a diagram illustrating reception timings of received signals and respective periods.
  • FIG. 4A shows a signal received by the stereoscopic video viewing glasses 150 on the time axis.
  • FIG. 4B is a diagram in which the period of each type of command received by the stereoscopic video viewing glasses 150 is calculated.
  • the stereoscopic video viewing glasses 150 receive other signals (noise) and other signals in addition to commands for controlling the opening and closing of the left eye filter unit 309 and the right eye filter unit 310.
  • FIG. 4A and FIG. 4B there are six types of signals including these noises.
  • it is assumed that six types of commands from the first to the sixth in FIG. 4A are defined as commands for controlling the stereoscopic video viewing glasses 150, and are effective from those command strings. A method for extracting commands will be described.
  • the command reception interval calculation unit 312 calculates the period of each signal based on the reception timing of these signals. . For example, for the first signal, the command reception interval calculation unit 312 measures the time from when the first signal is first received until the next first signal is received. This measurement is based on the reference signal supplied from the reference signal generation unit 307. The command reception interval calculation unit 312 acquires the reception interval T11 by this measurement. The command reception interval calculation unit 312 obtains reception intervals T12 and T13 in the case of FIG. 4 by repeating the same measurement every time the first signal is received for the first command.
  • the command reception interval calculation unit 312 similarly measures the reception intervals of the respective signal receptions for the second to sixth signal receptions as well. For the second signal, receive intervals T21, T22, T23, for the third signal, receive intervals T31, T32, T33, for the fourth signal, receive intervals T41, T42, T43, The command reception interval calculation unit 312 acquires reception intervals T51, T52, and T53 for signals, and reception intervals T61 and T62 for the sixth signal.
  • the command reception interval calculation unit 312 calculates each period for each signal type from the acquired reception interval. For the first signal, the command reception interval calculation unit 312 determines the period T1 of the first signal from the acquired reception interval by the following calculation formula.
  • T1 (T11 + T12 + T13) / 3
  • the command reception interval calculation unit 312 also performs the second signal cycle T2, the third signal cycle T3, the fourth signal cycle T4, the fifth signal cycle T5, and the sixth signal cycle T6. Similarly, each period is calculated.
  • T2 (T21 + T22 + T23) / 3
  • T3 (T31 + T32 + T33) / 3
  • T4 (T41 + T42 + T43) / 3
  • T5 (T51 + T52 + T53) / 3
  • T6 (T61 + T62) / 2
  • FIG. 5 shows an example in which the period of the first to sixth signals is calculated.
  • FIG. 5 shows the time interval when the reception interval is minimum for each command, the time interval when the reception interval is maximum, and the period (average period) of each signal calculated by the above formula and the like. It shows.
  • the period of the first to sixth signals is a value obtained by averaging the reception intervals acquired for each signal, but the invention of the present application is not limited to this.
  • an intermediate value may be adopted from a plurality of acquired reception interval values, and another method is to use an average value obtained by removing the minimum value and the maximum value. There may be. In other words, any calculation method may be used as long as the representative reception interval is calculated based on the reception interval of the actually received signal.
  • the command reception interval calculation unit 312 does not necessarily need to fix the period for each signal to a period once determined.
  • the period may be updated every time a command is received. In this case, when the display cycle is changed for each scene on the stereoscopic video display device side, the stereoscopic video viewing glasses 150 can follow the change of the command cycle.
  • the command reception interval calculation unit 312 performs grouping processing based on the cycle calculated for each received signal. There are several grouping methods.
  • the command reception interval calculation unit 312 may have a period in which the left and right eye filters are opened and closed in advance coincide with one of several predetermined periods. In such a case, the command reception interval calculation unit 312 performs grouping of received signals from the predetermined period.
  • the signal that should be received by the command reception interval calculation unit 312 is a command for opening the left eye filter unit 309, a command for closing the left eye filter unit 309, a command for opening the right eye filter unit 310, a command for closing the right eye filter unit 310, In this case, the operation according to these commands is as shown in FIG. Based on these periods, the command reception interval calculation unit 312 can estimate that each signal (command) is received at a reception interval that is approximately twice the frame display time.
  • the command reception interval calculation unit 312 estimates a signal received at a reception interval in the vicinity of 16.6 (ms), which is twice 8.3 (ms), as an effective command.
  • the other signals an invalid signal (noise).
  • the command reception interval calculation unit 312 groups the first to fourth signals as valid commands, and determines the fifth and sixth signals as noise. That is, the command reception interval calculation unit 312 can determine whether or not the command is a valid command based on whether or not the period of the received signal is in the vicinity of an integral multiple of a predetermined period.
  • “near” is a case where there is an error range and signal period of several percent before and after the theoretical command period.
  • the command reception interval calculation unit 312 can group effective commands based only on the calculated period of each signal.
  • the command reception interval calculation unit 312 has other values within the range of 97% to 103% (that is, a range of 3% before and after the value) of the period of each signal from the period of each signal shown in FIG. performing grouping on whether include periodic signals.
  • the first to fourth signals are all within the range of 3% before and after this, but the fifth and sixth signals are not included. Absent.
  • the command reception interval calculation unit 312 can group only valid commands.
  • the width of 3% is used as an example, but the present invention is not limited to this value.
  • FIG. 7 illustrates a result of grouping by the command reception interval calculation unit 312.
  • FIG. 7 describes the signals received at each vertex of the polygon, and the signals determined to be effective groups by the command reception interval calculation unit 312 are mutually connected in practice. In this way, and only the valid signal can be clearly understood.
  • the valid command extraction unit 313 extracts only signals recognized as valid commands by the command reception interval calculation unit 312 from the signals input from the reception unit 301 and the amplification unit 302. The valid command extraction unit 313 ignores other input signals.
  • the valid command extraction unit 313 controls the opening / closing operation of the left eye filter unit 309 and the right eye filter unit 310 via the filter control unit 314 and the filter driving unit 308 according to the control content of the valid command (FIG. 4C). ).
  • the stereoscopic video viewing glasses 150 reduce control disturbance due to noise.
  • FIG. 8 shows another example of the embodiment of the present invention, and is a diagram showing reception timing of received signals and respective periods.
  • FIG. 8A shows a signal received by the stereoscopic video viewing glasses 150 on the time axis.
  • FIG. 8B is a diagram in which the period of each type of command received by the stereoscopic video viewing glasses 150 is calculated.
  • the first signal (the number “1” surrounded by a circle in FIG. 8A). And subscript numbers “1” to “5”) indicate that noise is mixed and the command is received irregularly.
  • FIG. 8A shows a signal received by the stereoscopic video viewing glasses 150 on the time axis.
  • FIG. 8B is a diagram in which the period of each type of command received by the stereoscopic video viewing glasses 150 is calculated.
  • the first signal (the number “1” surrounded by a circle in FIG. 8A).
  • FIG. 8A shows a
  • the command sequence of the first signal is described using the symbols “1 1 ” to “1 5 ” corresponding to the numbers surrounded by the circles representing the first signal. .
  • a method of extracting a valid command from the command sequence of the first signal (“1 1 ” to “1 5 ”) will be described.
  • the command reception interval calculation unit 312 determines the reception interval of each signal based on the reception timing of these signals. calculate. In the example of FIG. 8, the command reception interval calculation unit 312 acquires a total of 10 reception intervals from the reception interval T 1-12 to T 1-45 .
  • FIG. 9 shows the result, which means that the command intervals of T 1-12 , T 1-14 , and T 1-24 are received at an integer multiple of the presumed frame interval. From the five first signals examined, it can be estimated that the three signals “1 1 ”, “1 2 ”, and “1 4 ” are correct control signals.
  • the command reception interval calculation unit 312 estimates a signal received at a reception interval near 16.6 (ms), which is twice 8.3 (ms), as an effective command. Other signals are invalid signals (noise). From the result of FIG. 9, the command reception interval calculation unit 312 groups “1 1 ”, “1 2 ”, and “1 4 ” as valid commands, and sets “1 3 ” and “1 5 ” as invalid signals (noise). ). That is, the command reception interval calculation unit 312 can determine whether or not the signal is valid based on whether or not the period of the received signal is near an integer multiple of a predetermined period.
  • the stereoscopic video viewing glasses 150 reduce control disturbance due to noise.
  • calculation unit 304 (the input switching unit 311, the command reception interval calculation unit 312, the valid command extraction unit 313, and the filter control unit 314) described in this embodiment is realized as a software program of the CPU 204 shown in FIG. It can also be realized as a hardware configuration such as an FPGA.
  • the embodiment described above mainly includes the following configuration.
  • the glasses for stereoscopic video viewing calculate a period of a signal received from the outside, and determine a valid signal according to the calculated period, and a signal received from the outside
  • An effective command extraction unit that extracts only the effective signal
  • a filter control unit that controls a left eye filter unit and a right eye filter unit that adjust the amount of light incident on the left and right eyes of the viewer according to the extracted command And.
  • the stereoscopic video viewing glasses to accept commands during a period in which a command is received from the outside, so the probability of receiving noise is low and the possibility of disturbing the control of the stereoscopic video viewing glasses is reduced. be able to.
  • the command reception interval calculation unit calculates the period of the signal received from the outside for each signal type, and the difference between the integer multiple of the calculated period and a preset period is within a predetermined range. the composed signal, it is preferable to determine the valid signal.
  • the stereoscopic video viewing glasses can reduce the possibility that the control is disturbed by noise.
  • the command reception interval calculation unit calculates the period of a signal received from the outside for each type of signal, and determines an effective signal according to the magnitude of the period error between the signals. .
  • the stereoscopic video viewing glasses can reduce the possibility that the control is disturbed by noise.
  • the invention of the present application is used for stereoscopic video viewing glasses that perform opening / closing control of a shutter (filter) based on a signal from a stereoscopic video display device.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

These glasses for viewing 3D video are provided with: a command-reception interval computation unit that computes the cycle length of signals received from elsewhere and determines a valid signal on the basis of the computed cycle length; a valid-command extraction unit that extracts only said valid signal from the received signals; and a filter control unit that, on the basis of the extracted command, controls a left-eye filter unit and right-eye filter unit that regulate the amount of light entering a viewer's left and right eyes.

Description

立体映像視聴用眼鏡Stereoscopic viewing glasses
　本発明は、立体映像を表示する立体映像表示装置から送信される同期信号を受信し、視聴者へ立体映像を視聴させるための立体映像視聴用眼鏡及びその制御方法に関する。 The present invention relates to stereoscopic video viewing glasses for receiving a synchronization signal transmitted from a stereoscopic video display device that displays a stereoscopic video and allowing a viewer to view the stereoscopic video and a control method thereof.
　立体映像を視聴する方法としては様々な方式が提案されている。その一つとして、立体映像を構成する左右両眼それぞれの視点での映像を時間的に交互に表示する表示装置と、該表示装置の左右それぞれの視点での映像の表示と同期して視聴者の左右それぞれの眼の前に設けられたシャッターを開閉する映像視聴用眼鏡と、により視聴者が立体映像を視聴できる立体映像システムがある（例えば、特許文献１）。 It has been proposed various methods as a way to view stereoscopic images. As one of them, a display device that alternately displays images from the viewpoints of the left and right eyes constituting a stereoscopic image, and a viewer in synchronization with the display of the images from the left and right viewpoints of the display device. There is a stereoscopic video system that allows a viewer to view a stereoscopic video by using video viewing glasses that open and close a shutter provided in front of the left and right eyes (for example, Patent Document 1).
　立体映像表示装置から、立体映像視聴用眼鏡へ同期信号を伝達する際に、無線や赤外線を使ったワイヤレス通信で伝送を行うと、立体映像視聴用眼鏡は同期信号以外のノイズ、例えば背景雑音（バックグラウンドノイズ）や他の機器が発する信号等、も受信する。立体映像視聴用眼鏡は、これらのノイズによりその制御が乱される可能性がある。 When transmitting a synchronization signal from the stereoscopic image display device to the stereoscopic image viewing glasses, if transmission is performed by wireless communication using wireless or infrared rays, the stereoscopic image viewing glasses have noise other than the synchronization signal, for example, background noise ( It signals such as background noise) and other equipment emitted, also receives. The control of the stereoscopic video viewing glasses may be disturbed by these noises.
米国特許第５６５４７４９号明細書US Pat. No. 5,654,749
　そこで、本出願の発明ではこれらのノイズが立体映像視聴用眼鏡に及ぼす影響を低減することを目的とするものである。 Therefore, the invention of the present application aims to reduce the influence of these noises on the glasses for viewing stereoscopic images.
　本発明の一局面に係る立体映像視聴用眼鏡は、外部から受信した信号の周期を算出し、算出した周期に従って有効な信号を決定するコマンド受信間隔算出部と、外部から受信した信号から前記有効な信号のみを抽出する有効コマンド抽出部と、前記抽出されたコマンドに従って、視聴者の左右両眼に入射する光量を調整する左眼フィルタ部と右眼フィルタ部とを制御するフィルタ制御部と、を備える。 The stereoscopic video viewing glasses according to one aspect of the present invention calculate a period of a signal received from the outside, determine a valid signal according to the calculated period, and the effective reception from the signal received from the outside An effective command extraction unit that extracts only a simple signal, a filter control unit that controls a left eye filter unit and a right eye filter unit that adjust the amount of light incident on the left and right eyes of the viewer according to the extracted command, Is provided.
本実施の形態で説明する立体映像表示装置と立体映像視聴用眼鏡からなる立体映像システムの構成図である。1 is a configuration diagram of a stereoscopic video system including a stereoscopic video display device and stereoscopic video viewing glasses described in the present embodiment. FIG. 本実施の形態で説明する立体映像視聴用眼鏡のハードウェア構成図である。It is a hardware block diagram of the glasses for stereoscopic video viewing described in the present embodiment. 本実施の形態で説明する立体映像視聴用眼鏡の機能構成図である。FIG. 3 is a functional configuration diagram of stereoscopic video viewing glasses described in the present embodiment. 立体映像視聴用眼鏡が受信する信号の受信タイミングとそれぞれの受信間隔を示す図である。It is a figure which shows the receiving timing of each signal which the spectacles for stereoscopic video viewing and reception and each receiving interval. 本実施の形態で説明する受信信号の、最小受信間隔、最大受信間隔、平均周期を示す図である。It is a figure which shows the minimum reception interval, the maximum reception interval, and an average period of the received signal demonstrated in this Embodiment. 本実施の形態で説明する受信信号のグルーピングを示す図である。Is a diagram showing the grouping of the reception signal described in this embodiment. 本実施の形態で説明する受信信号のグルーピング結果を多角形表示した場合の図である。It is a figure at the time of displaying the grouping result of the received signal demonstrated in this Embodiment in a polygon. 立体映像視聴用眼鏡が受信する信号の受信タイミングとそれぞれの受信間隔を示す図である。It is a figure which shows the receiving timing of each signal which the spectacles for stereoscopic video viewing and reception and each receiving interval. 本実施の形態で説明する受信信号のグルーピングを示す図である。Is a diagram showing the grouping of the reception signal described in this embodiment.
　＜立体映像表示システム構成＞
　図１は、立体映像を表示する映像表示装置１００と、映像表示装置１００が表示する立体映像を視聴する際に視聴者が装着する映像視聴用眼鏡１５０と、を備える映像表示システムを示した図である。 <3D image display system configuration>
FIG. 1 is a diagram showing a video display system including a video display device 100 that displays a stereoscopic video, and video viewing glasses 150 that a viewer wears when viewing the stereoscopic video displayed by the video display device 100. It is.
　表示部１１０は、映像表示装置１００が視聴者に表示する映像を表示する部分である。立体映像を表示する場合は、時間軸上で、左眼用の映像と右眼用の映像を交互、又は、一定間隔毎に切り替えて表示する。 The display unit 110 is a part that displays a video that the video display device 100 displays to the viewer. In the case of displaying a stereoscopic image, the left-eye image and the right-eye image are displayed alternately on the time axis or by switching at regular intervals.
　同期信号送信部１２０は、表示部１１０に表示する立体映像と同期した同期信号を外部、特に、映像視聴用眼鏡１５０へ送信する。なお、以下の説明では、同期信号の送受信に、赤外線を用いた場合を例として説明する。 The synchronization signal transmission unit 120 transmits a synchronization signal synchronized with the stereoscopic video displayed on the display unit 110 to the outside, particularly to the video viewing glasses 150. In the following description, an example in which infrared rays are used for transmission / reception of a synchronization signal will be described.
　映像視聴用眼鏡１５０は、右眼光学フィルタ部１６０と、左眼光学フィルタ部１７０と、同期信号受信部１８０と、を備える。 The video viewing glasses 150 include a right eye optical filter unit 160, a left eye optical filter unit 170, and a synchronization signal receiving unit 180.
　右眼光学フィルタ部１６０は、当該映像視聴用眼鏡１５０を着用した視聴者の右眼へ入射する光を制御する。より具体的には、映像表示装置１００の表示部１１０に表示された映像による光が右眼へ入射する光量、又は、光の特性を、調整、又は、変更する。 The right eye optical filter unit 160 controls the light incident on the right eye of the viewer wearing the video viewing glasses 150. More specifically, the amount of light incident on the right eye by the image displayed on the display unit 110 of the image display device 100 or the characteristics of the light is adjusted or changed.
　左眼光学フィルタ部１７０は、右眼光学フィルタ部１６０と同様に左眼へ入射する光を制御する。 The left eye optical filter unit 170 controls the light incident on the left eye in the same manner as the right eye optical filter unit 160.
　同期信号受信部１８０は、映像表示装置１００の同期信号送信部１２０から送信される同期信号を受信する。 The synchronization signal receiving unit 180 receives the synchronization signal transmitted from the synchronization signal transmitting unit 120 of the video display device 100.
　映像表示システムは、以上の構成を連携させて、視聴者へ立体映像を視聴させる。映像表示装置１００の表示部１１０には、立体映像が、例えば１２０Ｈｚの速度で、左眼用の映像と右眼用の映像を交互、又は、一定間隔毎に切り替えて表示する。同期信号送信部１２０は、表示部１１０に表示される左眼用の映像と右眼用の映像との切り替えと同期した同期信号を送信する。 The video display system links the above configuration to allow viewers to view stereoscopic video. On the display unit 110 of the video display device 100, a stereoscopic video is displayed at a speed of 120 Hz, for example, a left-eye video and a right-eye video are alternately displayed or switched at regular intervals. The synchronization signal transmission unit 120 transmits a synchronization signal synchronized with the switching between the left-eye video and the right-eye video displayed on the display unit 110.
　映像視聴用眼鏡１５０は、映像表示装置１００の同期信号送信部１２０から出力された同期信号を同期信号受信部１８０で受信する。映像視聴用眼鏡１５０は、同期信号を受信すると、受信した同期信号に基づいて左眼光学フィルタ部１７０と右眼光学フィルタ部１６０を制御して、映像視聴用眼鏡１５０を着用した視聴者の左眼、右眼へ入射する光量、又は、光の特性を制御する。例えば、映像表示装置の表示部１１０に左眼用の映像が表示されていることを示す同期信号を受信すると、左眼光学フィルタ部１７０を制御して左眼へ入射する光量を増大させる。このとき、右眼光学フィルタ部１６０では、右眼へ入射する光量を減光させる。この結果、視聴者は表示部１１０に表示された左眼用の映像を、左眼で視聴し、右眼では視聴しないこととなる。反対に、表示部１１０に表示される映像が右眼用の映像であることを示す同期信号を受信すると、左眼光学フィルタ部１７０は、左眼へ入射する光量を減光し、右眼光学フィルタ部１６０は、右眼へ入射する光量を増大させる。この結果、表示部１１０に表示された右眼用の映像は、視聴者の右眼で視聴し、左眼では視聴しないこととなる。 The video viewing glasses 150 receive the synchronization signal output from the synchronization signal transmission unit 120 of the video display device 100 by the synchronization signal reception unit 180. When the video viewing glasses 150 receives the synchronization signal, the video viewing glasses 150 control the left eye optical filter unit 170 and the right eye optical filter unit 160 based on the received synchronization signal, so that the left viewer of the viewer wearing the video viewing glasses 150 eye, the light quantity incident on the right eye, or to control the optical characteristics. For example, when a synchronization signal indicating that a left-eye image is displayed on the display unit 110 of the image display device is received, the left-eye optical filter unit 170 is controlled to increase the amount of light incident on the left eye. At this time, the right-eye optical filter unit 160 reduces the amount of light incident on the right eye. As a result, the viewer views the left-eye video displayed on the display unit 110 with the left eye and does not view with the right eye. Conversely, when receiving a synchronization signal indicating that the image displayed on the display unit 110 is a right-eye image, the left-eye optical filter unit 170 reduces the amount of light incident on the left eye, and the right-eye optics. filter unit 160 increases the amount of light entering the right eye. As a result, the video for the right eye displayed on the display unit 110 is viewed with the viewer's right eye and not viewed with the left eye.
　この際、表示部１１０に表示される左眼用の映像と右眼用の映像が、視聴者の視差の分だけ異なる映像であった場合、視聴者は、表示部１１０に表示される映像に視差があると知覚する。その結果、表示部１１０が略平面状の形態を持つ表示デバイスであっても、そこに表示される映像が立体的であると視聴者は感じることができる。 At this time, if the left-eye video and the right-eye video displayed on the display unit 110 are different from each other by the amount of the parallax of the viewer, the viewer displays the video displayed on the display unit 110. Perceived to have parallax. As a result, even if the display unit 110 is a display device having a substantially planar shape, the viewer can feel that the video displayed there is three-dimensional.
　＜立体映像視聴眼鏡のハードウェア構成＞
　図２は、映像視聴用眼鏡１５０のハードウェア構成を示した図である。映像視聴用眼鏡１５０は、ハードウェア構成として、赤外線受光センサ（ＩＲセンサ）２０１と、アンプ２０２と、ＬＥＤ２０３と、ＣＰＵ２０４と、スイッチ（ＳＷ）２０５と、ＲＯＭ２０６と、ＲＡＭ２０７と、クロック（ＣＬＫ）２０８と、アナログスイッチ２０９と、シャッター２１０と、アナログスイッチ２１１と、シャッター２１２とを有する。 <Hardware configuration of stereoscopic video viewing glasses>
FIG. 2 is a diagram illustrating a hardware configuration of the video viewing glasses 150. The eyeglasses for viewing video 150 have, as hardware configurations, an infrared light receiving sensor (IR sensor) 201, an amplifier 202, an LED 203, a CPU 204, a switch (SW) 205, a ROM 206, a RAM 207, and a clock (CLK) 208. An analog switch 209, a shutter 210, an analog switch 211, and a shutter 212.
　ＩＲセンサ２０１は、立体映像表示装置１００から送信される同期信号を受信するセンサである。ＩＲセンサ２０１は、受光した赤外線を電気信号に変換する。本実施の形態では同期信号は赤外線により伝搬させるものとして説明するが、これに限定するものではない。無線のようにワイヤレス方式により同期信号が伝搬されるものであれば他の方式を用いても良い。 The IR sensor 201 is a sensor that receives a synchronization signal transmitted from the stereoscopic video display device 100. The IR sensor 201 converts the received infrared light into an electrical signal. In this embodiment, the synchronization signal is described as being propagated by infrared rays, but the present invention is not limited to this. Other methods may be used as long as the synchronization signal is propagated by a wireless method such as radio.
　アンプ２０２は、ＩＲセンサ２０１が出力した電気信号を後段の処理ブロックで処理しやすいよう、適切に電気信号を増幅等する。 The amplifier 202 appropriately amplifies the electric signal so that the electric signal output from the IR sensor 201 can be easily processed by a subsequent processing block.
　ＬＥＤ２０３は、立体映像視聴用眼鏡１５０が動作中、又は、スイッチ２０５を入力して電源を入れた場合にユーザにその動作内容を明示するために、点灯等するものである。 The LED 203 is lit to clearly indicate the operation contents to the user when the stereoscopic video viewing glasses 150 are operating or when the switch 205 is input and the power is turned on.
　ＣＰＵ２０４は、立体映像視聴用眼鏡１５０の全般を制御する。本実施の形態では、ＣＰＵを例として説明するが、これ以外にもＤＳＰやＦＰＧＡ等で同様の処理を行うものであってもよい。 The CPU 204 controls the whole of the stereoscopic video viewing glasses 150. In the present embodiment, a CPU is described as an example, but a similar process may be performed by a DSP, FPGA, or the like.
　スイッチ（ＳＷ）２０５は、外部から立体映像視聴用眼鏡１５０への入力を実現するインターフェースである。 The switch (SW) 205 is an interface for realizing input to the stereoscopic video viewing glasses 150 from the outside.
　ＲＯＭ２０６は、ＣＰＵ２０４等が動作するためのプログラムや、動作パラメータ、初期値等を保持する。ＲＯＭ２０６は、書換え可能なフラッシュメモリ等を用いるものであっても良い。 The ROM 206 holds programs for operating the CPU 204 and the like, operation parameters, initial values, and the like. The ROM 206 may use a rewritable flash memory or the like.
　ＲＡＭ２０７は、ＣＰＵ２０４のプログラムが動作時に一時的に保持する変数値等を保持する。 The RAM 207 holds variable values and the like temporarily held by the CPU 204 program during operation.
　クロック（ＣＬＫ）２０８は、ＣＰＵ２０４やその他のハードウェア構成部を動作させるための基準クロックを発振する。 The clock (CLK) 208 oscillates a reference clock for operating the CPU 204 and other hardware components.
　アナログスイッチ２０９、２１１は、後述するシャッター２１０、２１２の開閉動作を駆動させるための駆動処理を行う。二つのアナログスイッチ２０９と２１１が設けられているのは、左右両眼のシャッター２１０、２１２をそれぞれに駆動させるために必要となるからである。 The analog switches 209 and 211 perform a driving process for driving an opening / closing operation of shutters 210 and 212 described later. The two analog switches 209 and 211 are provided because they are necessary to drive the left and right eye shutters 210 and 212, respectively.
　シャッター２１０、２１２は、視聴者の左右それぞれの眼の前に設けられ、立体映像表示装置１００が表示する映像と同期して開閉される。 The shutters 210 and 212 are provided in front of the left and right eyes of the viewer, and are opened and closed in synchronization with the video displayed by the stereoscopic video display device 100.
　＜立体映像視聴眼鏡の機能構成＞
　図３は、立体映像視聴用眼鏡１５０の機能構成を示す図である。立体映像視聴用眼鏡１５０は、機能構成として、受信部３０１と、増幅部３０２と、表示部３０３と、演算部３０４と、入力部３０５と、メモリ部３０６と、基準信号生成部３０７と、駆動部３０８と、左眼フィルタ部３０９と、右眼フィルタ部３１０と、を有する。 <Functional configuration of stereoscopic video viewing glasses>
FIG. 3 is a diagram illustrating a functional configuration of the stereoscopic video viewing glasses 150. The stereoscopic video viewing glasses 150 have a functional configuration such as a reception unit 301, an amplification unit 302, a display unit 303, a calculation unit 304, an input unit 305, a memory unit 306, a reference signal generation unit 307, and a drive. A unit 308, a left eye filter unit 309, and a right eye filter unit 310.
　受信部３０１は、立体映像表示装置１００から送信される同期信号を受信する。受信部３０１は、図２のＩＲセンサ２０１に相当する。 The receiving unit 301 receives a synchronization signal transmitted from the stereoscopic video display device 100. The receiving unit 301 corresponds to the IR sensor 201 in FIG.
　増幅部３０２は、受信部３０１が受信した信号を増幅する。増幅部３０２は、図２のアンプ２０２に相当する。 The amplifying unit 302 amplifies the signal received by the receiving unit 301. The amplification unit 302 corresponds to the amplifier 202 in FIG.
　表示部３０３は、立体映像視聴用眼鏡１５０がユーザに各種の情報を表示する。表示部３０３は、図２でいえばＬＥＤ２０３に相当するが、表示方式はＬＥＤに限定されるものではない。その他の方式でユーザに情報を表示するものであればいずれの実現方法であってもよい。 The display unit 303 displays various information to the user by the stereoscopic video viewing glasses 150. The display unit 303 corresponds to the LED 203 in FIG. 2, but the display method is not limited to the LED. Any realization method may be used as long as information is displayed to the user by other methods.
　演算部３０４は、立体映像視聴用眼鏡１５０の全体制御を行う。演算部３０４は、図２のＣＰＵ２０４に相当する。 The calculation unit 304 performs overall control of the stereoscopic video viewing glasses 150. The calculation unit 304 corresponds to the CPU 204 in FIG.
　入力部３０５は、ユーザーからの各種指示等を受け付ける。入力部３０５は、図２のスイッチ２０５に相当する。 The input unit 305 receives various instructions from the user. The input unit 305 corresponds to the switch 205 in FIG.
　メモリ部３０６は、各種の情報を恒久的に、又は一時的に保持する。メモリ部３０６は、図２のＲＯＭ２０６、ＲＡＭ２０７に相当する。 The memory unit 306 holds various types of information permanently or temporarily. The memory unit 306 corresponds to the ROM 206 and the RAM 207 in FIG.
　基準信号生成部３０７は、演算部３０４等が動作に必要とする基準信号を生成する。基準信号生成部３０７は、図２のクロック２０８に相当する。 The reference signal generation unit 307 generates a reference signal necessary for the operation of the arithmetic unit 304 or the like. The reference signal generation unit 307 corresponds to the clock 208 in FIG.
　駆動部３０８は、後述する左眼フィルタ部３０９や右眼フィルタ部３１０のシャッター等を動作させる信号を生成して出力する。フィルタ駆動部３０８は、図２のアナログスイッチ２０９、２１１に相当する。 The driving unit 308 generates and outputs a signal for operating a shutter of the left eye filter unit 309 and the right eye filter unit 310 described later. The filter driving unit 308 corresponds to the analog switches 209 and 211 in FIG.
　左眼フィルタ部３０９、右眼フィルタ部３１０は、視聴者の左右の眼へ入射する光量を制御する。左眼フィルタ部３０９、右眼フィルタ部３１０は、図２のシャッター２１０、２１２に相当する。 The left eye filter unit 309 and the right eye filter unit 310 control the amount of light incident on the left and right eyes of the viewer. The left eye filter unit 309 and the right eye filter unit 310 correspond to the shutters 210 and 212 in FIG.
　演算部３０４は、さらに入力切り替え部３１１と、コマンド受信間隔算出部３１２と、有効コマンド抽出部３１３と、フィルタ制御部３１４と、を有する。 The calculation unit 304 further includes an input switching unit 311, a command reception interval calculation unit 312, a valid command extraction unit 313, and a filter control unit 314.
　入力切り替え部３１１は、受信部３０１、増幅部３０２から入力される同期信号を演算部３０４が受け付けるか否かを制御する。入力切り替え部３１１は、例えば図２のＣＰＵ２０４における入力ポートの有効／無効等に相当する。 The input switching unit 311 controls whether the arithmetic unit 304 accepts the synchronization signal input from the receiving unit 301 and the amplifying unit 302. The input switching unit 311 corresponds to, for example, validity / invalidity of the input port in the CPU 204 in FIG.
　コマンド受信間隔算出部３１２は、受信部３０１等で受信する各種信号の受信周期を算出し、受信コマンドのグルーピング処理等により有効コマンドとそれ以外の信号（ノイズ）等との区別を行う。有効コマンドとそれ以外の信号との区別方法については後述する。 The command reception interval calculation unit 312 calculates reception periods of various signals received by the reception unit 301 and the like, and distinguishes between a valid command and other signals (noise) and the like by a reception command grouping process or the like. Will be described later distinguish how the effective command and other signals.
　有効コマンド抽出部３１３は、コマンド受信間隔算出部３１２により各種信号の受信周期を算出し、有効として区別されたコマンドを、実際の受信したコマンドから抽出する。有効コマンド抽出部３１３が受信信号から抽出したコマンドのみが、後述のフィルタ制御部に出力される。 The valid command extraction unit 313 calculates reception periods of various signals by the command reception interval calculation unit 312 and extracts commands that are distinguished as valid from the actual received commands. Only the command extracted from the received signal by the valid command extraction unit 313 is output to the filter control unit described later.
　フィルタ制御部３１４は、有効コマンド抽出部３１３により抽出されたコマンドに従って、駆動部３０８を介して左眼フィルタ部３０９と、右眼フィルタ部３１０との開閉を制御する。 The filter control unit 314 controls opening and closing of the left eye filter unit 309 and the right eye filter unit 310 via the drive unit 308 in accordance with the command extracted by the valid command extraction unit 313.
　なお、本実施の形態で説明する図３の機能構成と図２のハードウェア構成の対応は、一例であり、本出願の発明はこの対応関係に限定するものではない。 Note that the correspondence between the functional configuration of FIG. 3 and the hardware configuration of FIG. 2 described in this embodiment is an example, and the invention of the present application is not limited to this correspondence.
　＜コマンド受信信号の周期の算出＞
　図４は、受信信号の受信タイミングとそれぞれの周期を示す図である。図４（ａ）は、立体映像視聴用眼鏡１５０が受信する信号を時間軸上で示した図である。図４（ｂ）は、立体映像視聴用眼鏡１５０が受信したそれぞれの種類のコマンドの周期を算出した図である。立体映像視聴用眼鏡１５０は、左眼フィルタ部３０９、右眼フィルタ部３１０の開閉を制御するコマンド以外の、その他の信号（ノイズ）等の信号も含めて受信している。図４（ａ）、図４（ｂ）にはこれらノイズを含めた６種類の信号が存在している。図４に示す例では、立体映像視聴用眼鏡１５０を制御するコマンドとして、図４（ａ）の第１から第６までの６種類のコマンドが定義されているとして、それらのコマンド列から有効なコマンドを抽出する方法を説明する。 <Calculation of command received signal cycle>
FIG. 4 is a diagram illustrating reception timings of received signals and respective periods. FIG. 4A shows a signal received by the stereoscopic video viewing glasses 150 on the time axis. FIG. 4B is a diagram in which the period of each type of command received by the stereoscopic video viewing glasses 150 is calculated. The stereoscopic video viewing glasses 150 receive other signals (noise) and other signals in addition to commands for controlling the opening and closing of the left eye filter unit 309 and the right eye filter unit 310. In FIG. 4A and FIG. 4B, there are six types of signals including these noises. In the example shown in FIG. 4, it is assumed that six types of commands from the first to the sixth in FIG. 4A are defined as commands for controlling the stereoscopic video viewing glasses 150, and are effective from those command strings. A method for extracting commands will be described.
　コマンド受信間隔算出部３１２は、図４（ａ）に示す第１から第６の信号（６種類の異なる信号）を受信すると、これらの信号の受信タイミングに基づいてそれぞれの信号の周期を算出する。例えば、第１の信号について、最初に第１の信号を受信してから次の第１の信号を受信するまでの時刻を、コマンド受信間隔算出部３１２は計測する。この計測は、基準信号生成部３０７から供給される基準信号をベースに計測する。コマンド受信間隔算出部３１２は、この計測により受信間隔Ｔ１１を取得する。コマンド受信間隔算出部３１２は、第１のコマンドについて、同様の計測を続く第１の信号を受信する度に繰り返すことで、図４の場合には、受信間隔Ｔ１２とＴ１３を取得する。 When receiving the first to sixth signals (six different types of signals) shown in FIG. 4A, the command reception interval calculation unit 312 calculates the period of each signal based on the reception timing of these signals. . For example, for the first signal, the command reception interval calculation unit 312 measures the time from when the first signal is first received until the next first signal is received. This measurement is based on the reference signal supplied from the reference signal generation unit 307. The command reception interval calculation unit 312 acquires the reception interval T11 by this measurement. The command reception interval calculation unit 312 obtains reception intervals T12 and T13 in the case of FIG. 4 by repeating the same measurement every time the first signal is received for the first command.
　コマンド受信間隔算出部３１２は、同様に第２から第６の信号受信についても、それぞれの信号受信の受信間隔を計測する。第２の信号については、受信間隔Ｔ２１、Ｔ２２、Ｔ２３を、第３の信号については、受信間隔Ｔ３１、Ｔ３２、Ｔ３３を、第４の信号については受信間隔Ｔ４１、Ｔ４２、Ｔ４３を、第５の信号については、受信間隔Ｔ５１、Ｔ５２、Ｔ５３を、第６の信号については、受信間隔Ｔ６１、Ｔ６２を、コマンド受信間隔算出部３１２は取得する。 The command reception interval calculation unit 312 similarly measures the reception intervals of the respective signal receptions for the second to sixth signal receptions as well. For the second signal, receive intervals T21, T22, T23, for the third signal, receive intervals T31, T32, T33, for the fourth signal, receive intervals T41, T42, T43, The command reception interval calculation unit 312 acquires reception intervals T51, T52, and T53 for signals, and reception intervals T61 and T62 for the sixth signal.
　コマンド受信間隔算出部３１２は、取得した受信間隔から、信号の種類毎にそれぞれの周期を算出する。第１の信号について、コマンド受信間隔算出部３１２は、取得した受信間隔から第１の信号の周期Ｔ１を以下の計算式で決定する。 The command reception interval calculation unit 312 calculates each period for each signal type from the acquired reception interval. For the first signal, the command reception interval calculation unit 312 determines the period T1 of the first signal from the acquired reception interval by the following calculation formula.
　Ｔ１　＝　（Ｔ１１＋Ｔ１２＋Ｔ１３）／３ T1 = (T11 + T12 + T13) / 3
　コマンド受信間隔算出部３１２は、第２の信号の周期Ｔ２、第３の信号の周期Ｔ３、第４の信号の周期Ｔ４、第５の信号の周期Ｔ５、第６の信号の周期Ｔ６，についても同様にそれぞれの周期を算出する。 The command reception interval calculation unit 312 also performs the second signal cycle T2, the third signal cycle T3, the fourth signal cycle T4, the fifth signal cycle T5, and the sixth signal cycle T6. Similarly, each period is calculated.
　Ｔ２　＝　（Ｔ２１＋Ｔ２２＋Ｔ２３）／３
　Ｔ３　＝　（Ｔ３１＋Ｔ３２＋Ｔ３３）／３
　Ｔ４　＝　（Ｔ４１＋Ｔ４２＋Ｔ４３）／３
　Ｔ５　＝　（Ｔ５１＋Ｔ５２＋Ｔ５３）／３
　Ｔ６　＝　（Ｔ６１＋Ｔ６２）／２ T2 = (T21 + T22 + T23) / 3
T3 = (T31 + T32 + T33) / 3
T4 = (T41 + T42 + T43) / 3
T5 = (T51 + T52 + T53) / 3
T6 = (T61 + T62) / 2
　図５に、第１から第６の信号の周期について算出した場合の例を示す。図５にはそれぞれのコマンドについて受信間隔が最小となった場合の時間間隔と、受信間隔が最大となった場合の時間間隔と、上記の式等により算出したそれぞれの信号の周期（平均周期）とを示す。 FIG. 5 shows an example in which the period of the first to sixth signals is calculated. FIG. 5 shows the time interval when the reception interval is minimum for each command, the time interval when the reception interval is maximum, and the period (average period) of each signal calculated by the above formula and the like. It shows.
　なお、本実施の形態では、第１から第６の信号の周期を、それぞれの信号について取得した受信間隔を平均した値としたが、本出願の発明はこれに限定されるものではない。その他の方法として、取得した複数の受信間隔の値から中間値を採用するものであってもよいし、また、別の方法として最小値、最大値を除いた分での平均値を用いるものであっても良い。つまり、実際に受信した信号の受信間隔に基づいて代表となる受信間隔を算出するものであればいずれの算出方法であってもよい。 In the present embodiment, the period of the first to sixth signals is a value obtained by averaging the reception intervals acquired for each signal, but the invention of the present application is not limited to this. As another method, an intermediate value may be adopted from a plurality of acquired reception interval values, and another method is to use an average value obtained by removing the minimum value and the maximum value. There may be. In other words, any calculation method may be used as long as the representative reception interval is calculated based on the reception interval of the actually received signal.
　なお、コマンド受信間隔算出部３１２は、上記の信号毎の周期を、一度決定した周期に必ずしも固定する必要はない。コマンドを受信するたびに、当該周期を更新するものであってもよい。この場合には、立体映像表示装置側で表示周期をシーン毎に変化させる場合等に、立体映像視聴用眼鏡１５０は、コマンド周期の変化を追随されることができる。 Note that the command reception interval calculation unit 312 does not necessarily need to fix the period for each signal to a period once determined. The period may be updated every time a command is received. In this case, when the display cycle is changed for each scene on the stereoscopic video display device side, the stereoscopic video viewing glasses 150 can follow the change of the command cycle.
　＜コマンド受信信号のグルーピングと判定＞
　コマンド受信間隔算出部３１２は、受信した信号毎に算出した周期に基づいてグルーピング処理を行う。グルーピングの方法には幾つかの方法がある。 <Command reception signal grouping and determination>
The command reception interval calculation unit 312 performs grouping processing based on the cycle calculated for each received signal. There are several grouping methods.
　例えば、コマンド受信間隔算出部３１２は、あらかじめ左右両目のフィルタを開閉動作させる周期が、幾つか決まった周期の中のひとつと一致するような場合がある。このような場合、コマンド受信間隔算出部３１２は、その予め決まった周期から、受信した信号のグルーピングを行う。立体映像が１２０Ｈｚで左右の映像を表示している場合、単純に計算すると、それぞれのフレームの表示時間は、
　１０００（ｍｓ）　／　１２０（Ｈｚ）　＝　８．３（ｍｓ／ｆｒａｍｅ）
となる。 For example, the command reception interval calculation unit 312 may have a period in which the left and right eye filters are opened and closed in advance coincide with one of several predetermined periods. In such a case, the command reception interval calculation unit 312 performs grouping of received signals from the predetermined period. When the left and right images are displayed at 120 Hz, the display time of each frame is simply calculated as follows.
1000 (ms) / 120 (Hz) = 8.3 (ms / frame)
It becomes.
　コマンド受信間隔算出部３１２が本来受信するべき信号が、左眼フィルタ部３０９を開けるコマンド、左眼フィルタ部３０９を閉めるコマンド、右眼フィルタ部３１０を開けるコマンド、右眼フィルタ部３１０を閉めるコマンド、とした場合に、これらのコマンドによる動作は図４（ｃ）に示すようになる。コマンド受信間隔算出部３１２は、これらの周期に基づいてそれぞれの信号（コマンド）が上記フレーム表示時間の約２倍の受信間隔で受信されると推定することができる。 The signal that should be received by the command reception interval calculation unit 312 is a command for opening the left eye filter unit 309, a command for closing the left eye filter unit 309, a command for opening the right eye filter unit 310, a command for closing the right eye filter unit 310, In this case, the operation according to these commands is as shown in FIG. Based on these periods, the command reception interval calculation unit 312 can estimate that each signal (command) is received at a reception interval that is approximately twice the frame display time.
　これにより、コマンド受信間隔算出部３１２は、８．３（ｍｓ）の２倍となる１６．６（ｍｓ）の近辺の受信間隔で受信される信号を有効コマンドとして推定する。それ以外の信号を無効な信号（ノイズ）とする。図５の平均周期により、コマンド受信間隔算出部３１２は、第１から第４の信号を有効コマンドとしてグルーピングし、第５、第６の信号をノイズとして判定する。つまり、コマンド受信間隔算出部３１２は、受信した信号の周期が、予め決まっている周期の整数倍近辺となるか否かにより有効コマンドか否かを判定することができる。なお、ここで「近辺」とは理論的なコマンド周期の前後数パーセント程度の誤差の範囲、信号周期が存在する場合である。 Thereby, the command reception interval calculation unit 312 estimates a signal received at a reception interval in the vicinity of 16.6 (ms), which is twice 8.3 (ms), as an effective command. The other signals an invalid signal (noise). Based on the average period of FIG. 5, the command reception interval calculation unit 312 groups the first to fourth signals as valid commands, and determines the fifth and sixth signals as noise. That is, the command reception interval calculation unit 312 can determine whether or not the command is a valid command based on whether or not the period of the received signal is in the vicinity of an integral multiple of a predetermined period. Here, “near” is a case where there is an error range and signal period of several percent before and after the theoretical command period.
　また別の方法としてコマンド受信間隔算出部３１２は、算出したそれぞれの信号の周期のみに基づいて有効コマンドのグルーピングを行うことも可能である。コマンド受信間隔算出部３１２は、図５で示される各信号の周期より、各信号の周期の値の９７％から１０３％（つまり、その値の前後３％の幅の範囲）の範囲に他の信号の周期が含まれるか否かでグルーピングを行う。この場合、図６で示すように、第１から第４の信号についてはこの前後３％の幅の範囲に、すべての信号が収まっているが、第５、第６の信号については含まれていない。これにより、コマンド受信間隔算出部３１２は、有効コマンドのみをグルーピングすることも可能である。なお、本実施の形態では、例として前後３％の幅としたが、本発明はこの値に限定されない。 As another method, the command reception interval calculation unit 312 can group effective commands based only on the calculated period of each signal. The command reception interval calculation unit 312 has other values within the range of 97% to 103% (that is, a range of 3% before and after the value) of the period of each signal from the period of each signal shown in FIG. performing grouping on whether include periodic signals. In this case, as shown in FIG. 6, the first to fourth signals are all within the range of 3% before and after this, but the fifth and sixth signals are not included. Absent. As a result, the command reception interval calculation unit 312 can group only valid commands. In the present embodiment, the width of 3% is used as an example, but the present invention is not limited to this value.
図７は、コマンド受信間隔算出部３１２により、グルーピングした結果を図示したものである。図７は、多角形の各頂点に受信した信号をそれぞれ記載し、コマンド受信間隔算出部３１２により有効グループと判定された信号については、相互に実践で結んでいる。こうすることで、有効な信号のみが明確に理解できることとなる。 FIG. 7 illustrates a result of grouping by the command reception interval calculation unit 312. FIG. 7 describes the signals received at each vertex of the polygon, and the signals determined to be effective groups by the command reception interval calculation unit 312 are mutually connected in practice. In this way, and only the valid signal can be clearly understood.
　＜有効コマンドによるフィルタ部制御＞
　有効コマンド抽出部３１３は、受信部３０１、増幅部３０２から入力される信号から、コマンド受信間隔算出部３１２により有効コマンドと認められた信号のみを抽出する。有効コマンド抽出部３１３は、それ以外に入力される信号については無視する。有効コマンド抽出部３１３は、有効コマンドの制御内容にしたがって、フィルタ制御部３１４、フィルタ駆動部３０８を介して左眼フィルタ部３０９、右眼フィルタ部３１０の開閉動作を制御する（図４(ｃ)）。 <Filter section control by valid command>
The valid command extraction unit 313 extracts only signals recognized as valid commands by the command reception interval calculation unit 312 from the signals input from the reception unit 301 and the amplification unit 302. The valid command extraction unit 313 ignores other input signals. The valid command extraction unit 313 controls the opening / closing operation of the left eye filter unit 309 and the right eye filter unit 310 via the filter control unit 314 and the filter driving unit 308 according to the control content of the valid command (FIG. 4C). ).
　以上により、本実施の形態では、受信した信号から有効なコマンドのみを自動的に抽出し、ノイズ等を除去することで、ノイズによる影響を抑制することができる。その結果、立体映像視聴用眼鏡１５０は、ノイズによる制御の乱れを低減することとなる。 As described above, in the present embodiment, only the effective command is automatically extracted from the received signal, and the influence of noise can be suppressed by removing noise and the like. As a result, the stereoscopic video viewing glasses 150 reduce control disturbance due to noise.
　図８は、本発明の実施例の別の例を示したもので、受信信号の受信タイミングとそれぞれの周期を示す図である。図８（ａ）は、立体映像視聴用眼鏡１５０が受信する信号を時間軸上で示した図である。図８（ｂ）は、立体映像視聴用眼鏡１５０が受信したそれぞれの種類のコマンドの周期を算出した図である。図８（ａ）には、立体映像視聴用眼鏡１５０を制御するための４種類のコマンドを受信しているが、第１の信号（図８（ａ）中、円で囲まれた番号「１」及び下付番号「１」乃至「５」で示される。）には、ノイズが混入し不定期にコマンドを受信していることを示している。以下、図８（ａ）中、第１の信号を表す円で囲まれた番号に対応する「１１」乃至「１５」の符号を用いて、第１の信号のコマンド列が説明される。この図８に示す例では、第１の信号（「１１」から「１５」）のコマンド列から有効なコマンドを抽出する方法を説明する。 FIG. 8 shows another example of the embodiment of the present invention, and is a diagram showing reception timing of received signals and respective periods. FIG. 8A shows a signal received by the stereoscopic video viewing glasses 150 on the time axis. FIG. 8B is a diagram in which the period of each type of command received by the stereoscopic video viewing glasses 150 is calculated. In FIG. 8A, four types of commands for controlling the stereoscopic video viewing glasses 150 are received. The first signal (the number “1” surrounded by a circle in FIG. 8A). And subscript numbers “1” to “5”) indicate that noise is mixed and the command is received irregularly. In the following, in FIG. 8A, the command sequence of the first signal is described using the symbols “1 1 ” to “1 5 ” corresponding to the numbers surrounded by the circles representing the first signal. . In the example shown in FIG. 8, a method of extracting a valid command from the command sequence of the first signal (“1 1 ” to “1 5 ”) will be described.
　コマンド受信間隔算出部３１２は、図８（ａ）に示す第１の信号（「１１」から「１５」）を受信すると、これらの信号の受信タイミングに基づいてそれぞれの信号の受信間隔を算出する。図８の例では、受信間隔Ｔ１－１２からＴ１－４５までの計１０個の受信間隔をコマンド受信間隔算出部３１２は取得する。 When receiving the first signals (“1 1 ” to “1 5 ”) shown in FIG. 8A, the command reception interval calculation unit 312 determines the reception interval of each signal based on the reception timing of these signals. calculate. In the example of FIG. 8, the command reception interval calculation unit 312 acquires a total of 10 reception intervals from the reception interval T 1-12 to T 1-45 .
　コマンド受信間隔算出部３１２は、取得したコマンド受信間隔が、あらかじめ想定されるフレームの表示時間の約２倍の時間の間隔になっているかを判定する。すなわち、例えば、立体映像が１２０Ｈｚで左右の映像を表示している場合、左右それぞれのフレームの表示時間は、
　１０００（ｍｓ）　／　１２０（Ｈｚ）　＝　８．３（ｍｓ／ｆｒａｍｅ）
となり、その２倍の約１６．６ｍｓに、取得したコマンド受信間隔が一致するかどうかをコマンド受信間隔算出部３１２は判定する。 The command reception interval calculation unit 312 determines whether the acquired command reception interval is a time interval that is approximately twice as long as the frame display time that is assumed in advance. That is, for example, when a stereoscopic image is displaying left and right images at 120 Hz, the display time of each of the left and right frames is
1000 (ms) / 120 (Hz) = 8.3 (ms / frame)
Thus, the command reception interval calculation unit 312 determines whether or not the acquired command reception interval coincides with about 2 times that of 16.6 ms.
　図９は、その結果を示したもので、Ｔ１-１２、Ｔ１－１４、Ｔ１－２４のコマンド間隔があらかじめ想定されるフレーム間隔の整数倍で受信されていることを意味しており、検査した５つの第１の信号から「１１」、「１２」、「１４」の３つの信号が正しい制御信号であると推定することができる。 FIG. 9 shows the result, which means that the command intervals of T 1-12 , T 1-14 , and T 1-24 are received at an integer multiple of the presumed frame interval. From the five first signals examined, it can be estimated that the three signals “1 1 ”, “1 2 ”, and “1 4 ” are correct control signals.
　これにより、コマンド受信間隔算出部３１２は、８．３（ｍｓ）の２倍となる１６．６（ｍｓ）の近辺の受信間隔で受信される信号を有効コマンドとして推定する。それ以外の信号を無効な信号（ノイズ）とする。図９の結果から、コマンド受信間隔算出部３１２は、「１１」、「１２」、「１４」を有効コマンドとしてグルーピングし、「１３」、「１５」を無効な信号（ノイズ）と判定する。つまり、コマンド受信間隔算出部３１２は、受信した信号の周期が、予め決まっている周期の整数倍付近となるか否かにより、信号が有効であるか否かを判定することができる。 As a result, the command reception interval calculation unit 312 estimates a signal received at a reception interval near 16.6 (ms), which is twice 8.3 (ms), as an effective command. Other signals are invalid signals (noise). From the result of FIG. 9, the command reception interval calculation unit 312 groups “1 1 ”, “1 2 ”, and “1 4 ” as valid commands, and sets “1 3 ” and “1 5 ” as invalid signals (noise). ). That is, the command reception interval calculation unit 312 can determine whether or not the signal is valid based on whether or not the period of the received signal is near an integer multiple of a predetermined period.
　以上により、本実施の形態では、受信した信号から有効な信号のみを自動的に抽出し、ノイズ等を除去することで、ノイズによる影響を抑制することができる。その結果、立体映像視聴用眼鏡１５０は、ノイズによる制御の乱れを低減することとなる。 As described above, in the present embodiment, only the effective signal is automatically extracted from the received signal, and the influence of noise can be suppressed by removing noise and the like. As a result, the stereoscopic video viewing glasses 150 reduce control disturbance due to noise.
　なお、本実施の形態で説明した演算部３０４（入力切り替え部３１１、コマンド受信間隔算出部３１２、有効コマンド抽出部３１３、フィルタ制御部３１４）は、図２で示したＣＰＵ２０４のソフトウェアプログラムとして実現することも、ＦＰＧＡ等のハードウェア構成として実現することも可能である。 Note that the calculation unit 304 (the input switching unit 311, the command reception interval calculation unit 312, the valid command extraction unit 313, and the filter control unit 314) described in this embodiment is realized as a software program of the CPU 204 shown in FIG. It can also be realized as a hardware configuration such as an FPGA.
　上述された実施形態は、以下の構成を主に備える。 The embodiment described above mainly includes the following configuration.
　上述の実施形態の一局面に係る立体映像視聴用眼鏡は、外部から受信した信号の周期を算出し、算出した周期に従って有効な信号を決定するコマンド受信間隔算出部と、外部から受信した信号から前記有効な信号のみを抽出する有効コマンド抽出部と、前記抽出されたコマンドに従って、視聴者の左右両眼に入射する光量を調整する左眼フィルタ部と右眼フィルタ部とを制御するフィルタ制御部と、を備えることを特徴とする。 The glasses for stereoscopic video viewing according to one aspect of the above-described embodiment calculate a period of a signal received from the outside, and determine a valid signal according to the calculated period, and a signal received from the outside An effective command extraction unit that extracts only the effective signal, and a filter control unit that controls a left eye filter unit and a right eye filter unit that adjust the amount of light incident on the left and right eyes of the viewer according to the extracted command And.
　これにより、外部からのコマンド受信がある期間に立体映像視聴用眼鏡はコマンドの受け入れを行うので、ノイズを受信する確率が低くなり、立体映像視聴用眼鏡の制御が乱される可能性を低くすることができる。 This allows the stereoscopic video viewing glasses to accept commands during a period in which a command is received from the outside, so the probability of receiving noise is low and the possibility of disturbing the control of the stereoscopic video viewing glasses is reduced. be able to.
　上記構成において、前記コマンド受信間隔算出部は、外部から受信した信号の周期を信号の種類毎に算出し、該算出した周期の整数倍と予め設定された周期との差が所定の範囲内となる信号を、有効な信号と決定することが好ましい。 In the above configuration, the command reception interval calculation unit calculates the period of the signal received from the outside for each signal type, and the difference between the integer multiple of the calculated period and a preset period is within a predetermined range. the composed signal, it is preferable to determine the valid signal.
　上記構成によれば、立体映像視聴用眼鏡は、ノイズによりその制御を乱される可能性を低減することができる。 According to the above-described configuration, the stereoscopic video viewing glasses can reduce the possibility that the control is disturbed by noise.
　上記構成において、前記コマンド受信間隔算出部は、外部から受信した信号の周期を信号の種類毎に算出し、該信号相互間の周期の誤差の大きさにより、有効な信号を決定することが好ましい。 In the above configuration, it is preferable that the command reception interval calculation unit calculates the period of a signal received from the outside for each type of signal, and determines an effective signal according to the magnitude of the period error between the signals. .
　上記構成によれば、立体映像視聴用眼鏡は、ノイズによりその制御を乱される可能性を低減することができる。 According to the above-described configuration, the stereoscopic video viewing glasses can reduce the possibility that the control is disturbed by noise.
　本出願の発明は立体映像表示装置からの信号に基づいてシャッター（フィルター）の開閉制御を行う立体映像視聴用眼鏡に利用である。 The invention of the present application is used for stereoscopic video viewing glasses that perform opening / closing control of a shutter (filter) based on a signal from a stereoscopic video display device.

Claims (3)

  1. 　外部から受信した信号の周期を算出し、算出した周期に従って有効な信号を決定するコマンド受信間隔算出部と、
    　外部から受信した信号から前記有効な信号のみを抽出する有効コマンド抽出部と、
    　前記抽出されたコマンドに従って、視聴者の左右両眼に入射する光量を調整する左眼フィルタ部と右眼フィルタ部とを制御するフィルタ制御部と、
    　を備える立体映像視聴用眼鏡。     A command reception interval calculation unit that calculates a period of a signal received from the outside and determines a valid signal according to the calculated period;
    An effective command extraction unit that extracts only the effective signal from a signal received from the outside;
    A filter control unit for controlling a left eye filter unit and a right eye filter unit for adjusting the amount of light incident on the left and right eyes of the viewer according to the extracted command;
    Glasses for viewing stereoscopic images.
  2. 　前記コマンド受信間隔算出部は、外部から受信した信号の周期を信号の種類毎に算出し、該算出した周期の整数倍と予め設定された周期との差が所定の範囲内となる信号を、有効な信号と決定する、
    　請求項１に記載の立体映像視聴用眼鏡。     The command reception interval calculation unit calculates a period of a signal received from the outside for each signal type, and a signal in which a difference between an integer multiple of the calculated period and a preset period is within a predetermined range, Determine a valid signal,
    The stereoscopic image viewing glasses according to claim 1.
  3. 　前記コマンド受信間隔算出部は、外部から受信した信号の周期を信号の種類毎に算出し、該信号相互間の周期の誤差の大きさにより、有効な信号を決定する、
    　請求項１に記載の立体映像視聴用眼鏡。     The command reception interval calculation unit calculates the period of a signal received from the outside for each type of signal, and determines an effective signal according to the magnitude of the period error between the signals.
    The stereoscopic image viewing glasses according to claim 1.
PCT/JP2010/005896 2010-09-30 2010-09-30 Glasses for viewing 3d video WO2012042575A1 (en)

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DE212010000155U DE212010000155U1 (en) 2010-09-30 2010-09-30 Glasses for watching stereoscopic images
CN2010900007010U CN202514019U (en) 2010-09-30 2010-09-30 Glasses used for watching stereoscopic images
PCT/JP2010/005896 WO2012042575A1 (en) 2010-09-30 2010-09-30 Glasses for viewing 3d video
FR1158455A FR2965694B3 (en) 2010-09-30 2011-09-22 STEREOSCOPIC IMAGE VIEW GLASSES

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JPS62239784A (en) * 1986-04-11 1987-10-20 Sanyo Electric Co Ltd Stereoscopic television control system
JPH0292187A (en) * 1988-09-29 1990-03-30 Victor Co Of Japan Ltd Spectacle device for stereoscopic picture
JPH1198538A (en) * 1997-09-19 1999-04-09 Sanyo Electric Co Ltd Drive unit of liquid crystal shutter eyeglass
JP2010273259A (en) * 2009-05-25 2010-12-02 Sony Corp Reception device, shutter glasses, and transmission/reception system

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Publication number Priority date Publication date Assignee Title
DE4238046A1 (en) 1992-11-11 1994-05-19 Basf Ag New bis (4-substituted-2,6-diisopropylphenyl) carbodiimides, a process for their preparation and their use and the 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS62239784A (en) * 1986-04-11 1987-10-20 Sanyo Electric Co Ltd Stereoscopic television control system
JPH0292187A (en) * 1988-09-29 1990-03-30 Victor Co Of Japan Ltd Spectacle device for stereoscopic picture
JPH1198538A (en) * 1997-09-19 1999-04-09 Sanyo Electric Co Ltd Drive unit of liquid crystal shutter eyeglass
JP2010273259A (en) * 2009-05-25 2010-12-02 Sony Corp Reception device, shutter glasses, and transmission/reception system

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