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WO2006078030A1 - Appareil, méthode et programme informatique empêchant l’enregistrement vidéo - Google Patents

Appareil, méthode et programme informatique empêchant l’enregistrement vidéo Download PDF

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Publication number
WO2006078030A1
WO2006078030A1 PCT/JP2006/301009 JP2006301009W WO2006078030A1 WO 2006078030 A1 WO2006078030 A1 WO 2006078030A1 JP 2006301009 W JP2006301009 W JP 2006301009W WO 2006078030 A1 WO2006078030 A1 WO 2006078030A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
recording
screen
pattern shape
light emitting
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2006/301009
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English (en)
Japanese (ja)
Inventor
Kazuo Kuroda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Corp
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
Publication date
Application filed by Pioneer Corp filed Critical Pioneer Corp
Publication of WO2006078030A1 publication Critical patent/WO2006078030A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/26—Projecting separately subsidiary matter simultaneously with main image
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0051—Embedding of the watermark in the spatial domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91392—Television signal processing therefor for scrambling ; for copy protection using means for preventing making copies of projected video images

Definitions

  • the present invention relates to a recording prevention apparatus and method for preventing illegal recording of a movie screened on a movie theater screen, for example, and a technical field of a computer program for causing a computer to function as such an unauthorized recording prevention apparatus. .
  • Patent Document 1 US Pat. No. 6,018,374
  • the infrared light is projected onto the screen by the infrared lamp, the infrared light is projected on the entire screen. Therefore, for example, when it is desired to display certain character information with infrared light, it is necessary to project infrared light onto a portion of the screen that does not display the character, which is not efficient. Have a point.
  • the present invention has been made in view of, for example, the conventional problems described above. Recording prevention apparatus and method that make it possible to better protect the copyrights of movies, etc., against illegal recordings of movies, etc. screened in the hall, and prevent such recording of computers
  • the problem is to provide computer programs that function as devices.
  • the recording prevention apparatus of the present invention partially irradiates the screen on which video is projected with a non-visible light according to a predetermined pattern shape, or is adjacent to the screen or on the screen.
  • the light emitting means that emits the invisible light partially according to the pattern shape and the light emitting means that controls the light emitting means to emit or emit the invisible light according to the pattern shape continuously for a predetermined period of time. Control means.
  • the recording preventing apparatus of the present invention it is possible to irradiate the screen with non-visible light by the operation of the light emitting means.
  • invisible light can be emitted on the screen (or at a position adjacent to the screen).
  • the “invisible light” in the present invention means light that cannot be detected by human eyes, and specifically means light other than visible light.
  • the light emitting means emits or emits invisible light according to a predetermined pattern shape.
  • a pattern shape for example, a character, a figure, a number, or other various shapes can be given as one specific example.
  • the light emitting means can be formed into a predetermined pattern shape by irradiating the screen with invisible light or emitting invisible light on the screen (or at a position adjacent to the screen). Characters, figures, numbers, etc. can be drawn on the screen (or at a position adjacent to the screen). However, since this pattern shape is drawn by invisible light, it is not visible (not perceived) by human eyes. On the other hand, for example, an imaging device such as a video camera described later senses and captures (records) this pattern shape.
  • the light emitting means irradiates at least part of the screen partially (or selectively or intensively) with non-visible light to the limit necessary for drawing the pattern shape.
  • the light emitting means is placed on the screen to the extent necessary to draw the pattern shape. (Or adjacent to the screen) to partially (or selectively or intensively) emit non-visible light. That is, it is possible to draw a pattern shape that does not emit invisible light to the entire screen without irradiating the entire screen with invisible light.
  • the period during which the light emitting means emits or emits invisible light is controlled by the operation of the control means. That is, in the operation of the control means, the light emitting means is controlled so that invisible light is continuously emitted or emitted for at least a predetermined period.
  • an image is picked up by an image pickup device such as a video camera that does not affect a normal spectator watching the image displayed on the screen. It is possible to insert (include) characters, numbers, figures, etc. as pattern shapes into the video. Therefore, even if the image displayed on the screen using the imaging device is improperly imaged, the pattern shape indicating that the image was improperly imaged (more specifically, a warning message as described later) Therefore, it is very disturbing when viewing the captured video. This leads to stopping the act of illegally capturing the image projected on the screen in this way, and as a result, the copyright of the image projected on the screen can be suitably protected.
  • an image pickup device such as a video camera that does not affect a normal spectator watching the image displayed on the screen.
  • the period during which invisible light is irradiated or emitted is controlled by the operation of the control means. For this reason, a period that can more effectively prevent unauthorized imaging of the image displayed on the screen is specified, and the invisible light is continuously emitted or emitted during that period. It becomes possible to control the light emitting means. Therefore, the pattern shape can be drawn more effectively from the viewpoint of time, and the copyright of the video can be more suitably protected.
  • the control means is a light reception period in which the imaging device capable of capturing the video displayed on the screen as the predetermined period receives light.
  • the light emitting means is controlled so as to irradiate or emit the invisible light according to the pattern shape continuously for a period corresponding to at least twice.
  • the imaging device has n frames per second.
  • the control means controls the light emitting means to irradiate or emit the invisible light according to the pattern shape continuously for a period of at least 2000 Zn seconds. It may be configured as ⁇ .
  • the light emitting means includes a laser device capable of irradiating the invisible light.
  • various information that is not visually recognized by movie viewers can be drawn on the screen as a predetermined pattern shape by the laser device.
  • a laser device corresponding to a point light source as the light emitting means, it is sufficient to irradiate a part of the screen that does not need to irradiate the entire screen, such as a lamp, for example. Ruru. Therefore, various information can be drawn more efficiently.
  • the light emitting means includes a plurality of light emitting diodes each emitting the invisible light.
  • the plurality of light emitting diodes it is possible to draw various kinds of information that is not visually recognized by a movie spectator on the screen as a predetermined pattern shape by the plurality of light emitting diodes.
  • a light emitting diode corresponding to a point light source as a light emitting means, invisible light is partially emitted from a part of the screen, such as a lamp, where it is not necessary to irradiate the entire screen with invisible light. It's enough. Therefore, various information can be drawn more efficiently.
  • control means irradiates the non-visible light according to the pattern shape at least during a period excluding a period during which the video is projected on the screen.
  • the light emitting means is controlled to emit light.
  • various information can be drawn as a pattern shape on the screen while being distinguished (separated) from the original video.
  • an image is captured by an imaging device
  • the image captured by the imaging device is played back due to the difference between the number of frames in the projected pattern of the image and the number of frames of the light receiving pattern of the imaging device, etc.
  • a black screen may be displayed on the screen.
  • various information drawn as a pattern shape can be included in the black screen, and the copyright of the video can be more suitably protected.
  • the pattern shape indicates at least one of copyright information of the video and a warning text that warns of illegal use of the video.
  • the pattern shape indicates restriction information for restricting at least one of recording and reproduction of the video.
  • an imaging device or the like is manufactured in conformity with the restriction information standard
  • illegal imaging of a video is forcibly performed when the imaging device or the like recognizes the restriction information. It can also be stopped.
  • the playback equipment is manufactured according to the restriction information standard. If it is created, it is possible to forcibly stop the playback of the illegally captured video when the playback device recognizes this restriction information. Therefore, such point power can further protect the copyright of the video.
  • the pattern shape includes: screenable area information indicating an area where the video can be displayed; name information indicating a name of a theater where the video is displayed; It indicates at least one of the date and time information indicating the date and time when the video was actually shown.
  • the pattern shape includes a barcode pattern.
  • more information can be included in the barcode pattern as the pattern shape than when various types of information are drawn with characters as the pattern shape.
  • the above-described various information can be drawn in a format that can be easily recognized by various devices such as a recorder and a player.
  • the light emitting means emits or emits a plurality of invisible lights having different wavelengths.
  • an image is captured by the imaging device using the filter that cuts invisible light in a predetermined wavelength band without including various information such as the above-described warning text. Can be prevented.
  • a person who illegally captures an image using a filter that cuts invisible light in a certain wavelength band is irradiated with or emits invisible light having a different wavelength that cannot be cut, the various benefits described above are obtained. Can be enjoyed.
  • the light emitting means is a laser apparatus capable of irradiating the invisible light, and the laser apparatus Further, a change means for adding a temperature change may be further provided.
  • the wavelength of the invisible light emitted from the laser device can be relatively easily increased or decreased by increasing or decreasing the temperature of the laser device (or the ambient temperature) by the operation of the changing means. Can be changed. Therefore, as described above, it is possible to relatively easily prevent the inconvenience that an image is picked up by an image pickup device using a filter that cuts invisible light in a predetermined wavelength band.
  • the invisible light includes at least one of infrared light and ultraviolet light.
  • control unit is configured to change the intensity of the non-visible light according to light and darkness of the video displayed on the screen. To control.
  • the control means may set the intensity to a predetermined value when the video is relatively bright.
  • the intensity may be changed, and when the image is relatively dark, the intensity may be changed so that the intensity is higher than the predetermined value.
  • the pattern shape drawn using invisible light behaves like a flickering force on the screen.
  • the recording prevention method of the present invention partially irradiates the screen on which the video is projected with a non-visible light according to a predetermined pattern shape, or is adjacent to the screen or on the screen.
  • the invisible light is emitted or partially emitted in accordance with the pattern shape, and the invisible light is irradiated or emitted in a continuous manner for a predetermined period.
  • the recording prevention method according to the present invention can also adopt various aspects.
  • a computer program according to the present invention causes a computer to function as at least a part of the above-described recording prevention apparatus (including various forms thereof). More specifically, the computer is caused to function as at least the control means.
  • the computer program of the present invention if the computer program is read from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, and a hard disk that stores the computer program and then executed by the computer, Alternatively, if the computer program is downloaded to a computer via communication means and then executed, the above-described recording prevention apparatus of the present invention can be realized relatively easily.
  • the computer program of the present invention can also adopt various aspects.
  • a computer program product in a computer-readable medium is executable by a computer provided in the above-described recording prevention apparatus of the present invention (including various forms thereof).
  • Program instructions are clearly embodied to cause the computer to function as at least the control means.
  • the computer program product of the present invention if the computer program product is read into a computer from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product, or
  • a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product
  • the computer program product which is a transmission wave
  • the computer program product which is a transmission wave
  • the computer program product may be configured with computer-readable code (or computer-readable instructions) that functions as the above-described recording prevention apparatus of the present invention.
  • the light emission means and the control means, or the light emission process and the control process are provided. Therefore, in a more preferable aspect, for example, illegal recording of a movie or the like to be screened in a movie theater can be prevented, and as a result, the copyright of the movie or the like can be suitably protected.
  • FIG. 1 is a block diagram conceptually showing the basic structure of a recording prevention apparatus according to the example.
  • FIG. 2 is a block diagram conceptually showing another basic structure of the recording preventing apparatus according to the example.
  • FIG. 3 is a perspective view conceptually showing a movie projected on a screen.
  • FIG. 4 is a plan view conceptually showing the state of the screen when the movie is viewed and the state of the projected image when the movie recorded by the video camera is played.
  • FIG. 5 is a plan view showing a barcode pattern projected on the screen by the recording preventing apparatus, and a table showing the contents of information indicated by the barcode pattern.
  • FIG. 6 is a timing chart conceptually showing an irradiation pattern (irradiation timing) of laser light irradiated from the image prevention device.
  • FIG. 7 is a block diagram conceptually showing the basic structure of a recording prevention apparatus in a first modification.
  • FIG. 8 is a block diagram conceptually showing the basic structure of a recording prevention apparatus in a second modification.
  • FIG. 9 is a side view showing a method of arranging a recording preventing apparatus according to a second modification.
  • FIG. 10 is a plan view showing another arrangement method of the recording preventing apparatus according to the second modification.
  • FIG. 1 is a block diagram conceptually showing the basic configuration of the recording prevention apparatus according to this embodiment.
  • FIG. 2 is a conceptual diagram showing another basic configuration of the recording prevention apparatus according to this embodiment.
  • the recording prevention apparatus 100 includes a laser irradiation device 110, a mirror 121, a mirror 122, a mirror driving mechanism 123, and a control device 130.
  • the laser irradiation device 110 includes a laser diode and a lens, and is configured to be able to irradiate laser light having a predetermined wavelength. More specifically, the laser irradiation device 110 irradiates an infrared laser beam having a wavelength of, for example, 850 nm onto a screen 300 that displays a movie (particularly, an image thereof). Alternatively, instead of the infrared laser beam, a laser beam having a wavelength that is not visible light (more specifically, a wavelength of 400 nm or less or 800 nm or more) may be irradiated.
  • Each of the mirrors 121 and 122 reflects the infrared laser light emitted from the laser irradiation device 110 in a predetermined direction.
  • the mirror 121 can move, for example, in the up and down direction in FIG. 1 (the direction indicated by the white arrow in FIG. 1), and the mirror 122 can be moved in the left and right direction in FIG. It can be moved in the direction indicated by the arrow).
  • the direction in which the infrared laser beam is reflected is finely adjusted by moving the mirror 121 up and down and moving the mirror 122 in the left and right direction. As a result, the infrared laser beam on the screen 300 is irradiated. The position is adjusted as appropriate.
  • the mirror driving mechanism 123 moves the mirror 121 in the up and down direction in FIG. 1, and moves the mirror 122 in the left and right direction in FIG.
  • the mirror drive mechanism 123 includes a drive belt and a motor connected to each of the mirrors 121 and 122. By transmitting the rotational movement of the motor to the drive belt, each of the mirrors 121 and 122 is provided. Move.
  • the mirrors 121 and 122 may be moved using other methods.
  • the control device 130 is configured to be able to control various parameters such as the irradiation timing of the infrared laser light emitted from the laser irradiation device 110 and the output power.
  • the control device 130 controls the entire recording prevention device 100 by giving instructions to each component included in the recording prevention device 100 (particularly, the laser irradiation device 110 and the mirror drive mechanism 123). More specifically, the control device 130 includes a CPU 131 and a memory 132.
  • the CPU 131 actually controls the laser irradiation device 110 and the recording prevention device 100 as a whole.
  • the operation of the laser irradiation device 110 (or the entire recording prevention device 100) is controlled by a predetermined program running on the CPU 131 or based on the logic circuit configuration of the CPU 131.
  • the memory 132 is used in general data processing in the recording preventing apparatus 100 such as an area used as an intermediate buffer accompanying the operation of the CPU 131.
  • the memory 132 is composed of a ROM area in which a program for performing the operation as the recording prevention apparatus 100 is stored, and a RAM area in which variables necessary for the intermediate buffer program operation are stored.
  • the recording preventing apparatus 100 includes an external input device for the user to operate the recording preventing apparatus 100.
  • the external input device include a remote controller, a touch panel, an operation panel, a mouse, a keyboard, and the like.
  • the user can designate various information drawn on the screen by infrared laser light or perform other various operations using an external input device.
  • a recording preventing apparatus 101 including a polygon mirror 124 may be used instead of the mirror 122.
  • the polygon mirror 124 reflects the laser light emitted from the laser irradiation device 110 in a predetermined direction.
  • the polygon mirror 124 is configured to be able to rotate around a certain point of the polygon mirror 124 (for example, the center point of the polygon mirror).
  • the direction in which the infrared laser light is reflected is finely adjusted.
  • the position where the infrared laser light is irradiated on the screen 300 is appropriately adjusted. Adjusted.
  • the polygon mirror 124 since the polygon mirror 124 rotates, the polygon mirror 124 has an advantage that the operation life with fewer failures is relatively longer than that of the mirror 122 that reciprocates linearly (or repetitively moves linearly).
  • FIG. 3 is a perspective view conceptually showing how the movie is projected on the screen 300
  • Fig. 4 shows the state of the screen 300 showing the movie when viewed from the audience and a video camera
  • FIG. 5 is a plan view conceptually showing the state of a projected image when a movie recorded at is played back
  • FIG. 5 is a plan view and a bar diagram showing a barcode pattern projected on the screen 300 by the recording prevention device 100
  • FIG. 6 is a table showing the content of information indicated by the code pattern
  • FIG. 6 is a timing chart conceptually showing the irradiation pattern (irradiation timing) of the laser light irradiated from the recording preventing apparatus 100.
  • the recording preventing apparatus 100 draws and displays (displays and displays!) Various information (for example, character information and graphic information) such as a warning message, which will be described later, on the screen 300 using infrared laser light. ) What information is drawn on the screen 300 by such infrared laser light can be arbitrarily set by the user of the recording preventing apparatus 100. Alternatively, when the user inputs information according to the predetermined template, various information according to the predetermined template is displayed.
  • FIG. 4 (b) when a movie displayed on the screen 300 is recorded by, for example, a commercially available video camera or camcorder, and is played back on the monitor 400 or the like, it is shown in FIG. 4 (b).
  • a movie displayed on the screen 300 is recorded by, for example, a commercially available video camera or camcorder, and is played back on the monitor 400 or the like.
  • the infrared laser light irradiated on the screen 300 is simultaneously reproduced by the operation of the recording preventing apparatus 100.
  • various information such as warning text drawn on the screen 300 with infrared laser light. Is visible. This is because the CCD C (Charge Coupled Device) light sensing range of video cameras, etc. is wider than the human eye, so it records even light other than visible light (for example, infrared light). It is.
  • CCD C Charge Coupled Device
  • a barcode pattern may be drawn on the screen 300 by infrared laser light, as shown in FIG. Also in this case, such a bar code pattern is not visually recognized by a spectator who actually sees the movie displayed on the screen 300 at the movie theater.
  • a barcode pattern is displayed on the monitor 400.
  • the bar code pattern shown in FIG. 5 (a) includes various types of information, for example, a work indicating the copyright holder (or author) of the movie. Information on the owner, regional information indicating the region where the movie can be shown (region information), screening theater name information indicating the name of the theater where the movie was actually shown, and the movie was actually shown Day It includes screening date and time information indicating the time.
  • the barcode pattern includes recording control information and reproduction control information (that is, so-called CCI (Copy Control Information)) for controlling recording (recording) and playback (screening) of a movie.
  • the recording control information is used for prohibiting recording of the movie or permitting only certain devices. If it is a video camera that complies with the standard of recording control information, and if it is a video camera that has obtained a proper license for recording a movie, it can be drawn with infrared laser light by reading this recording control information. It is also possible to configure so that a movie can be appropriately recorded without receiving interference from various information. Alternatively, a video camera that complies with the standard of recording control information can be configured to forcibly stop recording a movie when the recording control information is read.
  • the playback control information is used for prohibiting playback of the movie or permitting only certain devices. If the player is a player compliant with the standard of playback control information and has acquired a proper license for playing back a recorded movie, the playback control information can be read by infrared laser light. It can also be configured to properly play back movies that are not affected by the various types of information drawn. Alternatively, a player that complies with the standard for playback control information can be configured to forcibly stop playback of a recorded movie when the playback control information is read.
  • the barcode pattern drawn on the screen 300 is read with a barcode reader or the like (or with a barcode reader or the like provided in a recorder or player such as a video camera). In fact, you can get it.
  • a barcode reader or the like provided in a recorder or player such as a video camera.
  • FIG. 5 (b) various types of information as shown in FIG. 5 (b) can be actually obtained.
  • the copyright holder is PN Corporation
  • the playable area is “Japan Ciapan”
  • the name of the screening theater is “Ginza 1st Theater”, Proves that it is “October 15, 2004”.
  • recording control information and reproduction control information can be obtained as a predetermined data string, for example.
  • the barcode pattern is not limited to the one-dimensional barcode as shown in FIG.
  • it may be a 2D barcode or a 3D barcode.
  • the information included in such a barcode pattern is not limited to the specific example shown in Fig. 5 ( b ), and other types of information (especially directly or indirectly for copyright protection). It may be configured to further include information that can contribute to Further, the various types of information shown in FIG. 5 (b) may be drawn as actual characters indicating the various types of information without drawing as the barcode pattern. Alternatively, the data may be drawn as a data string, a symbol string, or a pattern shape conforming to a predetermined format.
  • the projection pattern of a movie film is played back approximately 24 frames per second. Specifically, 24 frames of film are sent out per second, and the projector 200 emits light 24 times per second accordingly.
  • the light is emitted from the partial force projector 200 whose waveform is at a high level, which corresponds to the portion where the light is actually emitted.
  • CCDs provided in commercially available video cameras, etc., record images at a light reception timing of 30 frames per second if they conform to the NTSC (National TV Standard Committee).
  • the part where the waveform is at the high level corresponds to the part where the CCD is actually receiving light.
  • the recording prevention apparatus 100 is continuously applied to the screen 300 by infrared laser light for at least twice the light receiving timing of the CCD provided in the commercially available video camera or the like.
  • Various information is drawn.
  • CCD light reception is repeated with a period of 1Z30 seconds (approximately 33 milliseconds)
  • various information is continuously displayed on the screen 300 by infrared laser light for a period of at least 2Z30 seconds (approximately 66 milliseconds).
  • the timing (or period etc.) for drawing various information by such infrared laser light is performed under the control of the control device 130 (more specifically, the CPU 131).
  • the control device 130 more specifically, the CPU 131.
  • the recording preventing apparatus 100 by irradiating the screen 300 with infrared laser light, a normal audience watching a movie in a movie theater It is possible to insert (include) various information such as a predetermined warning text and copyright information into the video recorded by a video camera or the like without affecting it. Therefore, even if a movie is illegally recorded using a video camera, etc. in a movie theater, the video contains a warning message etc. indicating that the movie was illegally recorded. It is very annoying when watching the recorded video. This leads to stopping the act of illegally recording the movie in the movie theater as described above, and as a result, the copyright of the movie can be suitably protected.
  • the period during which various information is continuously drawn on the screen 300 by infrared laser light is set to at least twice the period in which the CCD receives light. Therefore, if various kinds of information are drawn on the screen 300 by infrared laser light continuously for such a period without considering the light reception timing of the CCD, at least one frame (more specifically, two consecutive frames) Any one of the frames) will contain various information in its entirety. Therefore, it is possible to prevent the inconvenience that there is a portion that does not include various information drawn by the infrared laser beam for all frames of the video recorded by the video camera. If various information is not included in the frame as a whole, various information is included in the frame! /, By selectively deleting the part, various information is included. There is also a risk of restoring the video. However, in this embodiment, such inconvenience can be prevented, and thereby the copyright of the movie can be more suitably protected.
  • the viewpoint power of including various information such as warning text in the image is at least twice the period in which the CCD receives light.
  • 2Z30 seconds about 66 milliseconds
  • the viewpoint of protecting the copyright of the movie better also has a continuous period (for example, 2Z30 seconds (about 66 milliseconds)) that is at least twice the period in which the CCD receives light. It is preferable to draw various kinds of information on the screen 300 with infrared laser light.
  • the timing of irradiating infrared laser light may be controlled in consideration of the projection pattern of the movie film described in FIG. Specifically, at least a period during which no light is emitted from the projector 200 (that is, a low level among the projection patterns of the movie film in FIG. 6).
  • the laser irradiation device 110 may be controlled so that various kinds of information are drawn on the screen 300 by infrared laser light during a period of time. By controlling in this way, various information can be drawn on the screen 300 while being distinguished (separated) from the actual movie image.
  • a black screen may be displayed in some areas.
  • various information drawn on the screen by the infrared laser beam can be included in the black screen, and the copyright of the movie can be more suitably protected.
  • the movie may be configured to draw various information on the screen 300 continuously by infrared laser light. From the viewpoint of reducing energy consumption, as described above, the CCD It is preferable to irradiate the screen 300 with infrared laser light intermittently while properly taking into account the light reception timing and movie film projection pattern.
  • infrared laser light is used to draw various types of information on the screen 300. For this reason, it is only necessary to selectively (or partially or intensively) irradiate infrared laser light on the portion of the screen 300 on which various information is to be drawn. Therefore, it is not necessary to project infrared light onto the entire screen 300 using an infrared lamp as in Patent Document 1 described above. In addition, it is necessary to draw desired characters on an infrared transmission filter or screen to block light other than infrared light that is generated unintentionally, which is necessary when using an infrared lamp. Components such as a liquid crystal shutter are not required. As a result, when laser light is used as in the present embodiment, various types of information can be drawn more efficiently than when an infrared lamp is used.
  • these various types of information can also be drawn as barcode patterns. For this reason, if the information device such as a video camera or the like or the information device such as a player can recognize the above-described various information in the form, it has an advantage.
  • drawing various information as a barcode pattern has an advantage that more information can be included as compared with drawing various information as normal characters.
  • the laser irradiation device 110 is capable of irradiating a laser beam having a wavelength that is not visible light (more specifically, a wavelength of 400 nm or less or 800 nm or more). It is preferable to irradiate a laser beam having a wavelength in a range that can be sensed by a CCD included in. For example, assuming that the CCD can sense light having a wavelength from 300 nm to 900 nm, the laser irradiation device is not visible light and has a wavelength of 300 nm power to 900 nm (specifically, 300 nm power).
  • a laser beam having a wavelength of 400 nm to 800 nm or 800 ⁇ m to 900 nm it is not necessary for the laser irradiation device 110 to exchange any data about the information with the video camera.
  • the default wavelength may be set.
  • the intensity of the infrared laser light emitted from the laser irradiation device 110 under the control of the control device 130 in accordance with the brightness intensity of the image or the like projected on the screen 300 (for example, infrared laser light)
  • the output power etc. may be changed.
  • the intensity of the infrared laser light is set to a predetermined value. The intensity may be changed.
  • the intensity of the infrared laser light is relatively increased.
  • the intensity may be changed (for example, so as to be equal to or higher than the predetermined value described above or to be stronger than the light / dark intensity of the image).
  • the intensity of light and darkness of the image projected on the screen 300 is determined by reflecting the image projected on the screen 300 through the visible light transmission filter (that is, reflected by the infrared laser beam). It can be obtained by detecting the brightness etc.).
  • the intensity of light and dark is based on the luminance signal of the video data that can also be obtained from the monitor terminal of the playback equipment. May be configured to ask for.
  • FIG. 7 is a block diagram conceptually showing the basic structure of the video recording preventing apparatus 102 according to the first modification.
  • the recording preventing apparatus 102 is similar to the recording preventing apparatus 100 described above, the laser irradiation device 110, the mirror 121, the mirror 122, and the mirror driving mechanism 1 23 and a control device 130.
  • the recording preventing apparatus 102 according to the first modification particularly changes the temperature of the laser irradiation apparatus 110 (more specifically, the temperature of the laser diode included in the laser irradiation apparatus 110).
  • the Peltier element 111 and the heater 112 are provided.
  • the Peltier element 111 is used for reducing the temperature of the laser irradiation device 110.
  • the temperature on one side (waste heat side) of the Peltier element decreases.
  • the temperature of the laser irradiation apparatus 110 can be reduced by making the side where the temperature has decreased adjacent to the laser irradiation apparatus 110.
  • the temperature of the laser irradiation device 110 may be reduced by various other methods such as electrical, chemical, or physical methods instead of the multi-element 111.
  • the heater 112 is used to increase the temperature of the laser irradiation device 110.
  • the temperature around the heating wire may be increased by passing a current through the heating wire or the like, and thereby the temperature of the laser irradiation device 110 may be increased.
  • the temperature of the laser irradiation device 110 can be increased by various other methods such as electrical, chemical or physical methods! It may be configured so that
  • the temperature change of the laser irradiation device 110 by the Peltier element 111 and the heater 112 is performed under the control of the control device 130 (more specifically, the CPU 131).
  • the wavelength of the laser light emitted from the laser irradiation device 110 changes. That is, it is possible to irradiate the screen 300 with a plurality of types of laser beams having different wavelengths from one recording prevention apparatus 100. For example, in addition to infrared laser light having a wavelength of 850 nm, ultraviolet laser light having a wavelength of 350 nm can be irradiated. Such switching of the wavelength of the laser beam to be irradiated may be performed every predetermined period, or may be performed randomly according to an instruction from the control device 130 or the user. Or you may switch according to the day which shows a movie.
  • the movie can be used for various information such as a warning sentence by the video camera using the filter that cuts light of a predetermined wavelength band. It is possible to prevent the inconvenience of being recorded without including the. For example, suppose an unauthorized user is recording a movie with a video camera using a filter that cuts light in the 850 nm wavelength band. At this time, the recording preventing apparatus 102 according to the first modified example has a wavelength of 350 nm, for example, in addition to the infrared laser beam having a wavelength of 850 nm. The above-described various information can be drawn on the screen 300 by irradiating the ultraviolet laser beam.
  • the laser light is not limited to two types of wavelengths, and a plurality of types of laser light may be irradiated. This makes it more difficult to cut these laser beams with a filter, and it is possible to better protect the copyright of the movie.
  • a plurality of laser irradiation devices may be provided so that a plurality of laser beams having different wavelengths can be irradiated, or even a single laser irradiation device.
  • a plurality of laser beams having different wavelengths can be irradiated by other methods regardless of temperature changes.
  • FIG. 8 is a block diagram conceptually showing the basic structure of the recording preventing apparatus 103 according to the second modification
  • FIG. 9 shows an arrangement method of the recording preventing apparatus 103 according to the second modification
  • FIG. 10 is a side view
  • FIG. 10 is a plan view showing another arrangement method of the recording preventing apparatus 103 according to the second modification.
  • the recording preventing apparatus 103 according to the second modification includes a control device 130, similar to the recording preventing apparatus 100 described above.
  • the recording preventing apparatus 103 according to the second modification particularly includes a diode display unit 140 and a control apparatus 130.
  • the diode display unit 140 includes a plurality of light emitting diodes 141 each capable of emitting infrared light, for example.
  • the plurality of light emitting diodes 141 are arranged regularly or discretely so as to constitute an aggregate of light having the above-described various types of information (that is, to display various types of information). Further, each of the plurality of light emitting diodes 141 may be configured to emit not only infrared light but also invisible light (for example, ultraviolet light) as in the case of the laser irradiation device 110 described above.
  • the recording preventing apparatus 103 under the control of the control apparatus 130, in addition, by selectively causing a desired light emitting diode 141 to emit light among the plurality of light emitting diodes 141, the above-described various information can be drawn on the diode display unit 140 as a whole. Accordingly, it is possible to receive the same benefits as the various benefits of the recording prevention apparatus 100 described above. Furthermore, as in the case of irradiating with laser light, the desired light emitting diode only needs to selectively emit infrared light (that is, a plurality of light emitting diodes partially), and therefore infrared light is emitted by an infrared lamp. Compared with the case of irradiating the entire screen 300, infrared light can be emitted more efficiently.
  • the recording preventing apparatus 103 according to the second modification is adjacent to the back side (or the back side or the far side) of the screen 300 as seen from the audience side, as shown in FIG. 9 (a). It may be placed in a position. Alternatively, as shown in FIG. 9B, it may be arranged at a position adjacent to the front side (or the near side or the near side) of the screen 300 as viewed from the audience side.
  • Each of the plurality of light emitting diodes 141 has only a size of, for example, lmm square, and even if arranged on the front side of the screen 300, it is hardly visible to the audience.
  • the infrared light emitted from the light emitting diode 141 is projected on the screen 300 and recorded together with the video camera. It is possible to insert (include) various information such as a predetermined warning text and copyright information into the video recorded by a video camera or the like without affecting the normal audience.
  • the recording preventing apparatus 103 may be arranged on the same plane as the screen (that is, on the screen).
  • a plurality of light emitting diodes 141 themselves may be embedded in the screen.
  • the screen in which the plurality of light emitting diodes 141 are embedded constitutes a modification of the recording preventing apparatus of the present invention.
  • the recording preventing apparatus 103 according to the second modification can also employ various configurations that can be adopted by the recording preventing apparatus 100 described above, and thereby enjoy the various benefits described above. .
  • the present invention is not limited to the above-described embodiments, but can be modified as appropriate without departing from the gist or spirit of the invention which can be read.
  • a recording prevention apparatus and method, and a computer program for recording prevention control are also included in the technical scope of the present invention.
  • the recording prevention apparatus and method and the computer program according to the present invention can be used in, for example, a recording prevention apparatus and method for preventing unauthorized recording of a movie screened on a movie theater screen. Further, the present invention can also be used for a recording prevention device or the like that is mounted on various computer equipment for consumer use or business use or that can be connected to various computer equipment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Projection Apparatus (AREA)

Abstract

Les appareils empêchant l’enregistrement vidéo (100, 103) sont pourvus de moyen émettant de la lumière (110, 141) qui irradient partiellement un écran (300) qui affiche une image avec de la lumière invisible en accord avec une forme de motif prescrite ou émet partiellement de la lumière invisible en accord avec la forme de motif tout en étant proche de l’écran ou sur l’écran, et un moyen de commande (130) pour commander le moyen d’émission de lumière pour qu’il applique ou émette la lumière invisible en continu pour une période prescrite en accord avec la forme de motif.
PCT/JP2006/301009 2005-01-24 2006-01-24 Appareil, méthode et programme informatique empêchant l’enregistrement vidéo Ceased WO2006078030A1 (fr)

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JP2005-015966 2005-01-24
JP2005015966 2005-01-24

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009282270A (ja) * 2008-05-22 2009-12-03 Nippon Hoso Kyokai <Nhk> 盗撮防止装置
JP2010128037A (ja) * 2008-11-26 2010-06-10 Nippon Hoso Kyokai <Nhk> 投影スクリーン
JP2010531617A (ja) * 2007-06-27 2010-09-24 トムソン ライセンシング ビデオ録画の防止のための周波数領域及びスペクトル領域のソリューション
JP2010532014A (ja) * 2007-06-27 2010-09-30 トムソン ライセンシング ビデオ録画の防止のための周波数領域及びスペクトル領域のソリューション
JP2010231748A (ja) * 2009-03-26 2010-10-14 Isafe:Kk 盗撮防止装置
WO2011002059A1 (fr) * 2009-07-03 2011-01-06 シャープ株式会社 Dispositif d'affichage vidéo, procédé d'affichage vidéo, écran d'affichage vidéo et dispositif d'affichage à cristaux liquides
JP2015175975A (ja) * 2014-03-14 2015-10-05 キヤノン株式会社 画像表示装置、画像表示方法及びプログラム

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Publication number Priority date Publication date Assignee Title
JPH0996868A (ja) * 1995-09-29 1997-04-08 Nippon Signal Co Ltd:The 投写形表示装置
JP2002341449A (ja) * 2001-05-16 2002-11-27 Sony Corp 撮像妨害方法及びシステム
US6809792B1 (en) * 2000-10-09 2004-10-26 Eastman Kodak Company Spectral watermarking for motion picture image data

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0996868A (ja) * 1995-09-29 1997-04-08 Nippon Signal Co Ltd:The 投写形表示装置
US6809792B1 (en) * 2000-10-09 2004-10-26 Eastman Kodak Company Spectral watermarking for motion picture image data
JP2002341449A (ja) * 2001-05-16 2002-11-27 Sony Corp 撮像妨害方法及びシステム

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010531617A (ja) * 2007-06-27 2010-09-24 トムソン ライセンシング ビデオ録画の防止のための周波数領域及びスペクトル領域のソリューション
JP2010532014A (ja) * 2007-06-27 2010-09-30 トムソン ライセンシング ビデオ録画の防止のための周波数領域及びスペクトル領域のソリューション
JP2009282270A (ja) * 2008-05-22 2009-12-03 Nippon Hoso Kyokai <Nhk> 盗撮防止装置
JP2010128037A (ja) * 2008-11-26 2010-06-10 Nippon Hoso Kyokai <Nhk> 投影スクリーン
JP2010231748A (ja) * 2009-03-26 2010-10-14 Isafe:Kk 盗撮防止装置
WO2011002059A1 (fr) * 2009-07-03 2011-01-06 シャープ株式会社 Dispositif d'affichage vidéo, procédé d'affichage vidéo, écran d'affichage vidéo et dispositif d'affichage à cristaux liquides
JPWO2011002059A1 (ja) * 2009-07-03 2012-12-13 シャープ株式会社 映像表示装置、映像表示方法、映像表示スクリーン、及び液晶表示装置
JP2015175975A (ja) * 2014-03-14 2015-10-05 キヤノン株式会社 画像表示装置、画像表示方法及びプログラム

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