WO2006009066A1 - Commutateur de signal vidéo et appareil dj - Google Patents
Commutateur de signal vidéo et appareil dj Download PDFInfo
- Publication number
- WO2006009066A1 WO2006009066A1 PCT/JP2005/013037 JP2005013037W WO2006009066A1 WO 2006009066 A1 WO2006009066 A1 WO 2006009066A1 JP 2005013037 W JP2005013037 W JP 2005013037W WO 2006009066 A1 WO2006009066 A1 WO 2006009066A1
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- signal
- video
- video signal
- switching
- signals
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- 230000001360 synchronised effect Effects 0.000 claims description 12
- 230000001934 delay Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005236 sound signal Effects 0.000 description 42
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 241001050985 Disco Species 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
Definitions
- the present invention relates to a signal switching device that switches and outputs a plurality of video signals.
- a switching device that switches and outputs a plurality of video signals
- a device that switches video signals by a mechanical or electrical switching device is known.
- a switching device if the images are not synchronized when switching the video signal, the output image will be disturbed.
- a video signal switching device is also known, which is equipped with a memory or the like, and stores image signals before and after the switching in the memory and reads them out to prevent image disturbance due to such a synchronization signal shift. There is a problem that the cost increases when the is installed.
- Patent Document 1 Japanese Patent Laid-Open No. 8-195068
- the present invention has been made in view of the above points, and provides a video signal switching device and a DJ device that have an inexpensive configuration and do not cause image disturbance due to synchronization shift when switching video signals. This is the issue.
- the video signal switching device generates a reference synchronization signal.
- a synchronization signal supply unit that supplies a first reference synchronization signal to the first playback device and a second reference synchronization signal to the second playback device based on the reference synchronization signal.
- a first video input unit that receives a first video signal input from the first playback device, and a second video input unit that receives a second video signal input from the second playback device power.
- a switching signal input unit that receives an input of a control signal; and a video switching output unit that switches and outputs one of the first video signal and the second video signal based on the switching control signal.
- the video signal switching device described above is a device that switches and outputs video signals reproduced from a plurality of reproduction devices such as a DVD player.
- the video signal switching device generates a reference synchronization signal, supplies the first reference synchronization signal to the first reproduction device based on the reference synchronization signal, and supplies the second reference synchronization signal to the second reproduction device. Supply.
- the first and second playback devices generate video signals based on these reference synchronization signals and input them to the video signal switching device. Then, the video signal switching device switches and outputs the first and second video signals based on the switching control signal.
- the video signal switching device can switch and output the video signal generated in each playback device based on the same reference synchronization signal.
- the first reference synchronization signal and the second reference synchronization are set so that the first video signal and the second video signal are synchronized.
- An adjustment unit for adjusting the signal is further provided.
- the adjustment unit adjusts the first and second reference synchronization signals so that the video signals input from the first and second reproduction devices are synchronized, the i-th and second reproduction devices Synchronization of the first and second video signals input from is established. Therefore, even when switching between them, it is possible to prevent the image from being disturbed due to the synchronization error.
- the adjustment unit detects a phase of a chroma carrier component of the first video signal and a phase of a chroma carrier component of the second video signal.
- a delay circuit that delays the reference synchronization signal to generate the first reference synchronization signal and the second reference synchronization signal, and a reference synchronization signal generated by the delay circuit according to a detection result of the phase detector.
- a delay amount control unit for controlling the delay amount of Is provided.
- the delay amounts of the first and second reference synchronization signals are controlled based on the phases of the chroma carrier components of the first and second video signals.
- the delay amounts of the first and second reference synchronization signals are controlled so that the phases of the chroma carrier components match. Therefore, since the first and second video signals input to the video signal switching device match up to the phase of the chroma carrier component, there is no problem in the display image such as a change in hue when switching between them. .
- the video switching output unit is configured to generate the first video signal during the blanking period of the first video signal and the second video signal based on the switching control signal.
- One of the video signal and the second video signal is switched and output.
- the video signal being switched is not displayed on a monitor or the like, so that it is possible to more reliably prevent the display of image disturbances and the like.
- a DJ device in another embodiment of the present invention, includes the above-described video signal switching device and an operation panel provided with a video signal selection operation unit, and the switching control signal is the video signal selection operation. It is generated by the operation of the part.
- the above video signal switching device can be suitably applied to DJ equipment that switches and outputs music and video. In this case, it is possible to switch the video signal in which synchronization is ensured according to the operation of the editor or the like on the video signal selection operation unit provided on the operation panel.
- FIG. 1 is a block diagram showing a schematic configuration of a signal switching system including a video switch according to an embodiment of the present invention.
- FIG.2 An example of the appearance of the video switcher operation panel is shown.
- FIG. 3 is a diagram for explaining the operation of the slide volume of the mixer.
- FIG. 5 is a block diagram showing the internal configuration of the video switcher.
- FIG. 6 is a block diagram showing an internal configuration of a synchronization signal generation unit in the video switcher. Explanation of symbols [0014] 10 bidet switcher
- FIG. 1 is a block diagram showing a schematic configuration of a signal switching system including a video switch according to an embodiment of the present invention.
- the signal switching system includes a video switcher 10, a player (A) 70a, a player 70b, and a mixer 50.
- the players 70a and 70b are video and audio signal playback devices, and for example, a DVD player can be used.
- the mixer 50 mixes the audio signals AUa and A Ub supplied from the players 70a and 70b, generates an output audio signal AUout, and outputs it.
- the output audio signal AUout is supplied to a speaker (not shown) via an amplifier (not shown) and output as sound.
- the mixer 50 includes a slide volume 52 that is operated by a DJ, VJ, or the like (hereinafter simply referred to as an “editor”). By operating the slide volume 52, the mixing ratio of the audio signals AUa and AUb is determined. That is, by operating the editor-powered slide volume 52, one of the audio signals AUa and AUb, or an output audio signal AUout in which both of them are mixed is output during switching between them.
- the mixer 50 supplies fader start signals STa and STb and cue-back signals CUa and CUb to the video switcher 10 as switching control signals.
- the slide volume 52, fader start signals STa and STb, and cue back signals CUa and CUb will be described in detail later.
- the video switcher 10 is a device that switches and outputs video signals supplied from the players 70a and 70b based on a switching control signal supplied from the mixer 50. Specifically, the video signal Va is supplied from the player 70a to the video switcher 10, and the video signal Vb is supplied from the player 70b.
- Video signals Va and Vb can be in the form of, for example, S-video (Y, C) signals, composite video signals, component video (Y, CbZPb, CrZPr) signals, and the like.
- the video switcher 10 supplies the fader start signal STa and the cueback signal CUa supplied from the mixer 50 to the player 70a, and the fader start signal STb and the cueback signal supplied from the mixer 50. Supply CUb to player 70b. Note that the video switcher 10 can also stop outputting the fader start signals STa and STb and the cueback signals CUa and CUb as will be described later, depending on internal settings.
- the video switcher 10 generates a reference video synchronization signal by an internal synchronization signal generation unit, supplies the reference video synchronization signal to the player 70a as the reference video synchronization signal SyncA, and supplies the reference video synchronization signal SyncB to the player 70b. .
- the players 70a and 70b supply video signals Va and Vb, which are synchronized with each other based on the same reference video synchronization signal, to the video switcher 10.
- the video switcher 10 can prevent image disturbance due to a shift in the synchronization signal when the video signals Va and Vb are switched.
- FIG. 2 shows an example of the appearance of the operation panel 10p of the video switcher 10.
- the video switch functions as a DJ device or VJ device (hereinafter referred to as “DJ device”), and various operations used by the editor when switching between video and audio signals. Is provided on the operation panel 10p.
- the operation panel 10p is provided with audio switching control switches 12a and 12b, video output switching switches 13a and 13b, a switching mode setting switch 14, and a power switch 15.
- the video output switching switches 13a and 13b and the switching mode setting switch 14 are preferably arranged close enough to be operated by the editor with one hand.
- the audio switching control switches 12a and 12b are switches for setting whether to supply the fader start signals STa and STb and the cueback signals CUa and CUb input from the mixer 50 to the respective players 70a and 70b.
- the audio switching control switch 12a for the player 70a and the audio switching control switch 12b for the player 70b are provided separately.
- the switching mode setting switch 14 is a switch for setting a video signal switching output mode by the video switcher 10.
- the video switcher 10 switches the switching control signal supplied from the mixer 50, i.e., the feeder start signals STa, STb, and Z or the cueback signal.
- the video signals Va and Vb are switched based on CUa and CUb and output as the output video signal Vout.
- the switching mode setting switch 14 is set to the manual switching mode, the video switcher 10 switches the video signals Va and Vb according to the operation of the video output switching switches 13a and 13b by the editor. Output as video signal Vout.
- the video output switching switches 13a and 13b are operated to select a video signal to be output as the output video signal Vout when the video switcher 10 is operating in the manual switching mode. That is, when the video switcher 10 is set to the manual switching mode by operating the switching mode setting switch 14, the video signal Va from the player 70a is output as the output video signal when the editor turns on the video output switching switch 1 3a. When the editor turns on the video output switching switch 13b, the video signal Vb from the player 70b is output as the output video signal Vout.
- the video output switching switches 13a and 13b are basically configured so that they can be selected alternatively. After one of the video output switching switches 13a and 13b is pressed to turn it on, When is released, the other is turned off.
- the video output switching switches 13a and 13b correspond to the video signal selection operation unit in the present invention.
- the mixer 50 is operated by an editor to switch between audio signals and video signals output from the players 70a and 70b. Specifically, the editor operates a slide volume 52 provided in the mixer 50.
- FIG. 3 schematically shows an operation example of the slide volume 52.
- the slide volume 52 is configured such that the position of the operation element (operation knob) 52x can be moved between an A end 52a which is one end and a B end 52b which is the other end. .
- the slide volume 52 has a function of generating a fader start signal ST and a cue back signal CU as switching control signals.
- FIG. 3 (a) consider a case where the operator 52x moves from the A end 52a to the B end 52b. While the controller 52x is positioned at the A end 52a, only the audio signal AUa is output as the output audio signal AUout.
- the mixer 50 outputs a fader start signal STb.
- the fader start signal STb is a signal for instructing the player 70b to start playback. Therefore, the player 70b that receives the fader start signal STb starts to reproduce the audio signal AUb.
- the mixer 50 outputs a cueback signal CUa.
- the cue back signal CUa is an instruction signal for setting the player 70a to the playback standby state. Therefore, when the player 70a receives the cueback signal CUa, the player 70a stops playback and performs a process such as moving the playback position to the playback start address, and enters a playback standby state.
- the mixer 50 outputs a fader start signal STa.
- the fader start signal STa is a signal for instructing the player 70a to start playback. Therefore, the player 70a that has received the fader start signal STa starts playing the audio signal AUa. Thereafter, when the controller 52x further moves and reaches the A end 52a, the mixer 50 outputs the cueback signal CUb.
- the cue-back signal CUb is an instruction signal for setting the player 70b to a playback standby state. Therefore, when the player 70b receives the cueback signal CUb, the player stops the reproduction and enters the reproduction standby state.
- the slide volume 52 has a function of defining the mixing ratio of the audio signals AUa and AUb input to the mixer 50.
- the relationship between the position of the operation element 52x in the slide volume 52 and the mixing ratio of the audio signals AUa and AUb is shown in the graph of FIG. In FIG. 4, the horizontal axis indicates the position of the operation element 52x in the slide volume 52, and the vertical axis indicates the level of the audio signals AUa and AUb output as the output audio signal AUout output from the mixer 50.
- FIG. 5 shows the internal configuration of the video switcher 10.
- the audio signals AUa and AUb shown in FIG. 1 are omitted! /.
- the video switcher 10 switches the video signals Va and Vb output from the players 70a and 70b based on the fader start signal ST or the cueback signal CU output from the mixer 50. I do.
- the video switch 10 includes an MPU 20, a signal selector 22, an amplifier 24, and a synchronization signal generator 30. Further, selection output signals from the respective switches provided on the operation panel 10p described above are input to the MCU 20.
- the video signal Va from the player 70a and the video signal Vb from the player 70b are input to the signal selector 22 and the synchronization signal generation unit 30, respectively.
- the synchronization signal generation unit 30 includes an oscillator and the like, and outputs reference video synchronization signals SyncA and SyncB synchronized with each other.
- Reference video sync signal Sy ncA and SyncB are input to players 70a and 70b, respectively.
- the player 70a generates a video signal Va based on the inputted reference video synchronization signal SyncA and inputs it to the video switcher 10.
- the player 70b generates a video signal Vb based on the input reference video synchronization signal SyncB and inputs it to the video switcher 10.
- the video signals Va and Vb input to the video switcher 10 are in phase with each other.
- the signal selector 22 selects one of the video signals Va and Vb based on the control signal S5 supplied from the MPU 20, and outputs the selected video signal Va to the amplifier 24 as an output video signal Vout.
- the output amplifier 24 functions as an output buffer and outputs the output video signal Vout to the outside of the video switcher 10.
- the fader start signal STa and the cueback signal CUa input from the mixer 50 are input to the MPU 20 and output to the outside of the video switcher 10 via the switches SW1 and SW2, respectively, and input to the player 70a. Is done. Switching between the switches SW1 and SW2 is performed according to the selection state of the audio switching control switch 12a shown in FIG. That is, the MPU 20 supplies the control signals S7a and S8a to the switches SW1 and SW2, respectively, based on the signal S3a indicating the selection state of the audio switching control switch 12a. Specifically, when the audio switching control switch 12a is in the on state, the switches SW1 and SW2 are turned on by the control signals S7a and S8a.
- the feeder start signal STa and the cue back signal CUa output from the mixer 50 are supplied to the player 70a.
- the switches SW1 and SW2 are turned off by the control signals S7a and S8a. Therefore, the fader start signal STa and the cueback signal CUa output from the mixer 50 are not supplied to the player 70a!
- fader start signal STb and cueback signal CUb input from mixer 50 are input to MPU 20 and output to the outside of video switcher 10 via switches SW3 and SW4, respectively. Is input to the player 70b. Switching between the switches SW3 and SW4 is performed according to the selection state of the audio switching control switch 12b shown in FIG. That is, the MPU 20 selects the audio switching control switch 12b. Based on the signal S3b indicating the state, the control signals S7b and S8b are supplied to the switches SW3 and SW4, respectively. Specifically, when the audio switching control switch 12b is in the on state, the switches SW3 and SW4 are turned on by the control signals S7b and S8b.
- the fader start signal STb and the cueback signal CUb output from the mixer 50 are supplied to the player 70b.
- the switches SW3 and SW4 are turned off by the control signals S7b and S8b. Therefore, the fader start signal STb and the cueback signal CUb output from the mixer 50 are not supplied to the player 70b.
- Selection by the signal selector 22 is performed based on the switching mode setting switch 14 and the video output switching switches 13a and 13b shown in FIG. Specifically, when the switching mode setting switch 14 is set to the automatic switching mode, a signal S2 indicating that is supplied to the MPU 20.
- the MPU 20 generates the control signal S5 based on the fader start signals STa, ST and Z or the cueback signals CUa and CUb supplied from the mixer 50, and controls switching by the signal selector 22.
- Feeder start signal that functions as a playback start signal ST identifies the side that is selected by switching ST
- cueback signal that functions as a playback standby signal identifies the side that is not selected by switching CU. It is possible to generate S5.
- the signal selector 22 is switched according to the operation of the slide volume 52 of the mixer 50 by the editor.
- both the audio switching control switches SW12a and 12b are set to the on state, the output audio signal AUout output from the mixer 50 and the output video signal Vout output from the video switch 10 are synchronized.
- the output audio signal AUout and the output video signal Vout are switched to the audio signal AUa and the video signal Va from the player 70a at the same timing, and then the audio signal AUb and the video signal Vb from the player 70b at the same timing. Can be switched to.
- the MPU 20 can also generate the control signal S5 for switching control of the signal selector 22 at the timing of either the fader start signal ST or the cueback signal CU.
- the fader start signal ST and the cue back signal CU are not switched in the present invention. This corresponds to the replacement control signal.
- the audio switching control switches 12a and 12b are set to the OFF state and the switching mode setting switch 14 is set to the automatic switching mode, the audio switching control switches 12a and 12b are set to the OFF state! / The switching of the audio signal of the other player is not synchronized with the switching of the video signal. However, even in this case, the switching of the video signal is automatically executed according to the operation of the slide volume 52 of the mixer 50 by the editor.
- the MP U 20 when the switching mode setting switch 14 is set to the manual switching mode, the MP U 20 generates the control signal S5 according to the operation state of the video output switching switches 13a and 13b, and the signal selector 22 To control. That is, when the editor presses the video output switching switch 13a, the signal selector 22 selects the video signal Va from the player 70a, and when the editor presses the video output switching switch 13b, the signal selector 22 starts from the player 70b. Select the video signal Vb. Thus, the editor can arbitrarily determine the output video signal Vout regardless of the audio signal output from the mixer 50.
- the switching mode setting switch 14 When the switching mode setting switch 14 is set to the manual switching mode and the audio switching control switches 12a and 12b are set to the ON state, the output video signal Vout is output by the editor.
- the output audio signal AUout is switched in accordance with the operation of the slide volume 52 by the editor, according to the operation of the switching switches 13a and 13b. That is, the editor can arbitrarily switch and control the output video signal Vout and the output audio signal AUout.
- the editor can easily control the switching between the video signal and the audio signal in various forms. That is, In the video switcher 10, when the automatic switching mode is selected and the audio switching control switches 12a and 12b are turned on, the switching between the output video signal and the output audio signal can be synchronized, Only the operation of the slide volume 52 of the mixer 50 is required. Also, if the audio switching control switches 12a and 12b are turned on and the manual switching mode is selected, the switching of the output audio signal is controlled by the operation of the mixer 50, and the switching of the output video signal is performed by the video switcher 10 The video output switching switches 13a and 13b can be controlled.
- the audio switching control switches 12a and 12b when the audio switching control switches 12a and 12b are turned off, the output of the output audio signal can be disconnected and only the switching control of the output video signal can be performed by operating the video switcher 10.
- These various controls can be realized by operating only a few switches of the mixer and the switcher, and can be easily executed by one editor. Therefore, music and video can be provided in various ways based on the editor's intention.
- the video switcher 10 of this embodiment manages the synchronization of the players 70a and 70b by generating a reference video synchronization signal internally and supplying it to the external players 70a and 70b.
- Players 70a and 70b need to be devices of a type that can output a video signal by an external synchronization signal to which an external force is also input.
- the synchronization signal generation unit 30 in the video switcher 10 generates the reference video synchronization signals SyncA and SyncB and supplies them to the players 70a and 70b, respectively. Therefore, the players 70a and 70b output video signals Va and Vb synchronized with the supplied reference video synchronization signals SyncA and SyncB, respectively.
- FIG. 6 shows an internal configuration of the synchronization signal generation unit 30.
- the synchronization signal generation unit 30 includes a chroma phase detector 32, a reference video synchronization signal generator 34, and delay circuits 36a and 36b.
- the reference video synchronization signal generator 34 corresponds to the reference synchronization signal generation unit in the present invention
- the delay circuits 36a and 36b correspond to the synchronization signal supply unit
- the MPU 20 and the delay circuits 36a and 36b correspond to the adjustment unit.
- the video signals Va and Vb output from the players 70 a and 70 b are supplied to the chroma phase detector 32 in the synchronization signal generation unit 30.
- the chroma phase detector 32 extracts a chroma carrier component (also referred to as a color burst signal or a color signal) from the input video signal force and detects its phase (hereinafter referred to as “chroma phase”). Specifically, the chroma phases of the video signals Va and Vb (first and second chroma phases, respectively) are supplied to the MPU 20 as a signal S6 indicating the phase detection result.
- the MPU 20 detects the phase difference (phase shift) between the video signals Va and Vb based on the signal S6 of the chroma phase detector 32 force, and based on the phase difference, the first chroma phase and the second chroma phase.
- the delay amounts of the delay circuits 36a and 36b are determined so as to match, and signals S9a and S9b indicating the respective delay amounts are supplied to the delay circuits 36a and 36b.
- the reference video synchronization signal generator 34 includes an oscillator having a predetermined frequency and the like, and is a reference video synchronization signal (specifically, horizontal and vertical synchronization signals) conforming to a video signal standard such as NTSC system or PAL system S11 Is supplied to each delay circuit 36a and 36b.
- the delay circuit 36a delays the reference video synchronization signal S11 by the delay amount indicated by the signal S9a, generates the reference video synchronization signal SyncA, and outputs it to the player 70a.
- the delay circuit 36b delays the reference video synchronization signal S11 by the delay amount indicated by the signal S9b, generates the reference video synchronization signal SyncB, and outputs it to the player 70b.
- the reference video synchronization signals SyncA and SyncB supplied to the players 70a and 70b have the same phase as the chroma carrier component, and the video signals Va and Vb input from the players 70a and 70b are also chroma.
- the phase of the carrier component is the same. Therefore, even when the video signals Va and Vb are switched and output by the signal selector 22, the video signals before and after the switching are in phase with each other, so that the image is not disturbed due to the synchronization signal shift.
- the vertical synchronization signal and the horizontal synchronization signal are synchronized.
- the image itself scrolls up and down on the screen of a monitor or the like, or temporarily moves left and right. Or vibrate.
- the hue may change when the video signal is switched if the phases of the chroma carrier components do not match.
- the black Since synchronization management is performed so that the phase of the m-carrier component is exactly matched, it is possible to prevent a change in hue when the video signal is switched.
- the signal selector 22 switches between the video signals Va and Vb.
- the replacement is preferably performed within a vertical blanking period (vertical blanking period).
- the MPU 20 receives the signal S indicating the operation of the video output switching switch 13a or 13b in the manual switching mode after receiving the fader start signal ST and Z or the cueback signal CU in the automatic switching mode.
- the signal selector 22 is preferably controlled so that the video signal is switched within the first vertical blanking period after receipt of la or S lb.
- the chroma phase detector 32 detects the first and second chroma phases and supplies them to the MPU 20, and the MPU 20 calculates the phase difference between them. Instead, the chroma phase detection The unit 32 may calculate those phase differences and supply them to the MPU 20.
- the present invention can be used for a device that switches and outputs a plurality of video signals, such as V, a so-called video switcher, and a video signal switching device.
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Abstract
Applications Claiming Priority (2)
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JP2004210313 | 2004-07-16 | ||
JP2004-210313 | 2004-07-16 |
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WO2006009066A1 true WO2006009066A1 (fr) | 2006-01-26 |
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PCT/JP2005/013037 WO2006009066A1 (fr) | 2004-07-16 | 2005-07-14 | Commutateur de signal vidéo et appareil dj |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62200989A (ja) * | 1986-02-28 | 1987-09-04 | Fuji Photo Film Co Ltd | 信号切換装置 |
JPH02216981A (ja) * | 1989-02-17 | 1990-08-29 | Hitachi Ltd | 画像合成装置 |
-
2005
- 2005-07-14 WO PCT/JP2005/013037 patent/WO2006009066A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62200989A (ja) * | 1986-02-28 | 1987-09-04 | Fuji Photo Film Co Ltd | 信号切換装置 |
JPH02216981A (ja) * | 1989-02-17 | 1990-08-29 | Hitachi Ltd | 画像合成装置 |
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