JPH0670270A - Control timing setting device for video printer - Google Patents

Abstract

PURPOSE:To easily and quickly set the control timing of a video printer by detecting the writing state of a black level and subtracting a short period of time from the set waiting period of time of the black level to set the control timing. CONSTITUTION:An adaptor control unit 57 of a video print adaptor 12 detects the read of the video signals SVB to take black levels out of a memory part 37 by a single frame period. At the same time, an infrared ray receiving part 41 receives an infrared ray UR and writes the waiting time TX in the part 37 and adds short period of time TA to a delay time taua till the start of a reading operation. Thus the writing/reading operations are carried out. This reading operation is decided and the short period of time DELTATA is subtracted from the waiting time TX. The result of this subtraction is set as the control timing TD and stored. This timing TD is utilized to transmit a control signal CO to the part 37 to fetch the reproduced video signals SV by the desired single period in consideration of the time taua during which the part 41 receives the ray UR and then starts the writing/reading operations of the part 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a video signal, for example,
For a video printer including a memory unit that captures a predetermined unit segment for one frame period and an image print unit that prints a still image based on the unit segment of the video signal captured in the memory unit, The present invention relates to a control timing setting device for a video printer, which determines a control timing at which a control signal for sending a unit of a video signal to a memory unit is sent.

[0002]

2. Description of the Related Art An operation of recording a video signal and an audio signal on a magnetic tape by using a rotary magnetic head, or an operation of reproducing a video signal and an audio signal recorded on a magnetic tape by using a rotary magnetic head. A reproduction video signal obtained from a video tape recorder (VTR) is supplied,
An apparatus called a video printer has been proposed, which is designed to print a still image on a paper surface based on the reproduced video signal. In such a video printer, a memory unit that is designed to capture a predetermined unit of the video signal, for example, one frame period, an image print unit that obtains a printout of a still image according to the video signal , And a printer control unit for controlling the operation of each unit including the memory unit and the image print unit. Under the operation control by the printer control unit, one frame selected from the reproduced video signals obtained from the VTR is selected. The period of time is once taken into the memory unit, then read from the memory unit and supplied to the image print unit, and the image print unit outputs the selected one frame period of the reproduced video signal obtained from the VTR. A printout of a still image based on is obtained.

When a still image is printed by the video printer in this way, a predetermined one frame period of the reproduced video signal obtained from the VTR is obtained so that a desired still image can be printed out. Minutes are selected and stored in the memory unit. The selection of a predetermined one frame period at that time is usually provided with a video monitor device for reproducing and displaying an image based on a reproduction video signal obtained from a VTR on a display screen, and a printer control unit in a video printer. An image based on the reproduced video signal is repeatedly monitored on the display screen of the video monitor device under the control signal supply unit for supplying an external control signal for giving an operation instruction thereto, and a desired still image is obtained. An image to be recorded is selected, and the control signal supply unit causes the printer control unit in the video printer to perform an operation of loading one frame period of the reproduced video signal for obtaining the selected image into the memory unit. The control signal is transmitted.

[0004]

As described above, V
When one frame period of the reproduced video signal obtained from TR is selected to be captured in the memory unit, the operation of capturing one frame period of the reproduced video signal from the control signal supply unit in the memory unit in the video printer From the time when the control signal for instructing is received until the time when the operation of actually fetching one frame period of the reproduced video signal into the memory section is performed based on the control signal. There will be a delay time as determined by. Therefore, the transmission of the control signal from the control signal supply unit to the printer control unit in the video printer is delayed from the time when the desired still image based on the reproduced video signal appears on the display screen of the video monitor device. It is required to be carried out with appropriate control timing, which is advanced by a time corresponding to the time.

However, while the image based on the reproduced video signal is monitored on the display screen of the video monitor device, the control signal supply unit causes the printer control unit of the video printer to obtain the reproduced video signal. Since a control signal for causing an operation of taking one frame period of the above into the memory unit is sent out, the control signal supply unit should send the control signal to the printer control unit in the video printer. It is extremely difficult to properly grasp the timing in a short time. Then, an operation of sending a designation signal from the control signal supply unit to the printer control unit of the video printer and confirming the one-frame period of the reproduced video signal stored in the memory unit based on the signal is repeatedly attempted. Therefore, the control timing at which the control signal should be sent to the printer control unit should be sought. Therefore, in the related art, one frame of the reproduced video signal for obtaining a desired image in the memory section of the video printer. It is difficult to easily and quickly obtain a state in which the period is properly taken in.

In view of the above point, the present invention provides a video signal of
For example, a video printer including a memory unit that captures a predetermined unit segment for one frame period and an image print unit that prints a still image based on the unit segment of the video signal captured in the memory unit is desired. Prior to obtaining the print output of the still image, the sending of the control signal for obtaining a state in which the unit section of the video signal for obtaining the desired image in the memory section is properly taken in,
It is an object of the present invention to provide a control timing setting device for a video printer, which can easily, properly, and swiftly set the control timing for performing the above.

[0007]

In order to achieve the above object, a control timing setting device for a video printer according to the present invention selectively sends a video signal having a black level and a video signal having a white level. A video signal generation unit, a memory unit that captures a predetermined unit of the video signal, an image print unit that prints a still image based on the unit segment of the video signal that is captured in the memory unit, and a video that is captured in the memory unit A control signal sending unit for supplying a control signal for controlling the operation of the video printer to a video printer having a video signal supply unit for supplying the unit division of the signal to the image display means, the video signal generating unit and the control signal sending unit. And a control unit that controls the operation of the control unit, and the control unit generates a video signal having a black level in the video signal generation unit and supplies it to the memory unit of the video printer. The black signal is supplied from the video signal generating section to the control signal sending section to the memory section of the video printer under the condition that the black level supplying means for maintaining the A control signal that causes the video signal supply unit of the video printer to output a memory operation control signal for causing the video signal supply unit of the video printer to supply the video signal captured in the memory unit to the image display unit. When the first waiting time elapses after the sending of the memory operation control signal from the sending unit and the control signal sending unit is started, the video signal generating unit is provided with a white level instead of a black level video signal. A white level supply means for generating a video signal to be taken and supplying the video signal to the memory section of the video printer, and a second level after the video signal from the video signal generating section is started to be supplied. When time has elapsed, the display on the image display means is divided into a black level writing state based on a video signal having a black level and a white level writing state based on a video signal having a white level. When a white level writing state is detected by the state determining unit that detects which of the two is a black level, the first waiting time is extended by a predetermined short time, Supplying means, control signal sending means, white level supplying means, and operation repeating means for causing the state determining means to sequentially repeat respective operations, and setting when a black level writing state is detected by the state determining means Time setting means for setting a time obtained by subtracting a predetermined short time from the first waiting time set as the time for expressing the control timing.

[0008]

In the control timing setting device for a video printer according to the present invention having the above-mentioned structure, the control unit generates the video signal having the black level by the black level supply means by the black level supply means. Operation for keeping the state of supply to the memory section of the video printer; the control signal sending section supplies the video signal of the black level from the video signal generating section to the control signal sending section. Memory operation for causing the image pickup section to be in a state of taking in the image signal from the image signal generation section and for causing the image signal supply section of the image printer to perform the operation of supplying the image signal taken in the memory section to the image display means. Operation for sending control signal; After the white level supply means starts sending the memory operation control signal from the control signal sending unit, a first waiting time elapses. When, in the video signal generating section,
An operation for generating a video signal having a white level instead of the video signal having a black level and for supplying the video signal to the memory section of the video printer; After the supply of
When the second waiting time has elapsed, the display on the image display means displays a black level writing state based on a video signal taking a black level and a white level writing based on a video signal taking a white level. The operation of detecting which of the two states is the first state is extended by a predetermined short time as long as the operation repeating unit detects the white level writing state by the state determining unit. When the black level writing state is detected by the state determining means by the time setting means, the time obtained by subtracting a predetermined short time from the first waiting time set at that time. , Is set as a time representing the control timing.

Under these circumstances, the first waiting time is changed from the state in which the white level writing state is detected by the state determining means to the state in which the black level writing state is detected by the state determining means. , The time from the start of sending the memory operation control signal from the control signal sending unit to the time when the unit division of the video signal being supplied to the memory unit of the video printer at that time is actually taken into the memory unit in advance. It represents the time when the defined short time is added.
Therefore, when the time determination unit detects the black level writing state by the state determination unit, the control timing set by subtracting a predetermined short time from the first waiting time set at that time is set. The time represented is the time from when the memory operation control signal is sent from the control signal sending unit to when the unit section of the video signal that is being supplied to the memory unit of the video printer at that time is actually loaded into the memory unit. It is said that Therefore, prior to obtaining the print output of the desired still image to the video printer, a control signal for obtaining a state in which the unit section of the video signal for obtaining the desired image in the memory section is properly taken in. The control timing at which to send the data is set easily, properly and promptly.

[0010]

FIG. 1 shows an example of a control timing setting device for a video printer according to the present invention, which together with a VTR, a video printer and a video monitor, constitutes a video signal reproduction and still image print system as a whole. It shows with.

The video signal reproducing and still image printing system shown in FIG. 1 is a VTR on which a magnetic tape T is mounted.
11, a video print adapter 12 that constitutes an example of a control timing setting device for a video printer according to the present invention, a video printer 13 that is controlled by the video print adapter 12, a video print adapter 12, and a video printer 1.
3 and a video monitor 14 connected to each other.

The VTR 11 is provided with two rotary magnetic heads 21A and 21B which are rotated so as to alternately come into sliding contact with the magnetic tape T. The rotary magnetic heads 21A and 21B are rotated by the heads. It is controlled by the servo control unit 22. The magnetic tape T is driven by a rotating capstan 23 and a pinch roller 24, and runs along the outer peripheral surface of a rotary cylinder (not shown) that incorporates the rotary magnetic heads 21A and 21B. The rotation of 23 is controlled by the capstan servo control unit 25.

The rotary magnetic heads 21A and 21B sequentially scan the recording tracks formed on the magnetic tape T,
The recording signals recorded on each recording track are sequentially read,
They are taken out as the read signal SR. The read signals SR alternately and intermittently obtained from the rotary magnetic heads 21A and 21B are sequentially taken out by the head selection switch 26 to be continuous, and supplied to the video / audio signal reproduction processing unit 27.

In the video / audio signal reproduction processing section 27, the video signal component and the audio signal component forming the read signal SR are mutually separated, and the separated video signal component and audio signal component are demodulated and frequency-converted. Various processes including processes are performed. As a result, a reproduced video signal SV based on the video signal component and a reproduced audio signal SA based on the audio signal component are obtained at the pair of output terminals of the video / audio signal reproduction processing unit 27, respectively, and the reproduced video signal SV is the video signal. Terminal 2
8 and 29 respectively, and reproduced audio signal SA
Is led to the audio signal terminal 30.

Further, the VTR 11 is provided with a VTR control unit 31, and the control signals CA and CB are sent from the VTR control unit 31 to the mechanical control unit 3.
2 and the operation control signal CH is supplied from the mechanical control unit 32 accordingly to the head servo control unit 22.
In addition, the operation control signal CP is supplied to the capstan servo control unit 25 to rotate the magnetic heads 21A and 21B.
And the running speed of the magnetic tape T depend on the selected reproduction operation mode. On the other hand, the head servo control unit 22 and the capstan servo control unit 25 respectively send signals QH and QP corresponding to the operating state to the mechanical control unit 32.

The mechanical control unit 32, based on the signal QH from the head servo control unit 22, has a cycle corresponding to the frame cycle of the video signal component contained in the read signal SR sequentially obtained from each of the rotary magnetic heads 21A and 21B. The frame information signal SL having the
Supply to 3. The frame counter 33 counts the frame period of the video signal component included in the read signal SR sequentially obtained from each of the rotary magnetic heads 21A and 21B based on the frame information signal SL, and as a result,
A frame number signal SNL representing a frame number corresponding to each frame period of the reproduced video signal SV obtained at one of a pair of output ends of the video / audio signal reproduction processing unit 27 is formed, and the frame number signal SNL is formed in the VTR control unit 31. Supply.

Further, the control signal CC is supplied from the VTR control unit 31 to the video / audio signal reproduction processing section 27, whereby the video / audio signal reproduction processing section 27 performs an operation according to the selected reproduction operation mode. To be in a state.
Further, from the video / audio signal reproduction processing unit 27, the sync signal QS in the video signal component forming the read signal SR is VTR.
It is sent to the control unit 31.

The video printer 13 has a video signal input terminal 35, a video signal output terminal 36, and a video signal input terminal 3
5, a memory unit 37 capable of capturing one frame period of the video signal supplied from No. 5, and one frame period of the video signal captured in the memory unit 37 are read from the memory unit 37 and supplied. An image printing unit 38 that prints an image represented by one frame period of a video signal on a paper surface to obtain a still image print output.
And a first state in which the video signal supplied from the video signal input terminal 35 is derived to the video signal output terminal 36 and one frame period of the video signal read from the memory unit 37 is derived to the video signal output terminal 36. And a switch 39 for selectively taking the second state of turning on. Further, the video printer 13 is provided with a printer control unit 40, and the printer control unit 40 writes into the memory section 37 one frame period of the video signal supplied from the video signal input terminal 35. Also, a control signal CM for performing a read operation for reading one frame period of the captured video signal is supplied to the memory unit 37, and the switch 39 is made to selectively take the first state and the second state. A switch 39 is supplied with a control signal CW that selectively takes a high level and a low level as much as possible, and a control signal CT for causing the image printing unit 38 to perform a still image print output is displayed. It is supplied to the printing unit 38.

An infrared receiver 41 is attached to the printer control unit 40, and the infrared receiver 41 is attached.
Receives the infrared light modulated by the control signal coming from the outside, reproduces the control signal CO from the outside, and supplies it to the printer control unit 40.

The video monitor 14 has an input terminal 45 connected to a video signal output terminal 36 of the video printer 13.
And an image display section 46 for supplying an image signal from the input terminal 45 to display an image on the display screen based on the image signal, and an optical sensor 47 for detecting the brightness of the image on the display screen in the image display section 46. And an output terminal 48 from which the detection signal SB from the optical sensor 47 is derived.

The video print adapter 12, which is an example of the control timing setting device for the video printer according to the present invention, has a video signal input terminal 51 connected to the video signal terminal 29 of the VTR 11 and a video signal input of the video printer 13. A video signal output terminal 52 connected to the terminal 35, a detection signal input terminal 53 connected to the output terminal 48 of the video monitor 14, a video signal SVB having a black level and a video signal SVW having a white level are selectively selected. A video signal generating section 54 to be transmitted to a video signal input terminal 51, a reproduced video signal SV from the VTR 11 supplied from the video signal input terminal 51, and a video signal SVB having a black level or a video signal SVW having a white level. Depending on the switch 55 for selecting and taking out and the control signal CO to the video printer 13. And a infrared transmission unit 56 for transmitting the by infrared UR. In addition, the video print adapter 12 includes a VTR control unit 31 in the VTR 11.
The adapter control unit 57 is provided with the bidirectional data bus 50 between the adapter control unit 5 and
Reference numeral 7 supplies a control signal CV that selectively takes a low level and a high level to the video signal generator 54, and a switch 55 selectively takes a low level and a high level. The control signal CS is supplied.

The video signal generator 54 sends out a video signal SVB taking a black level according to the control signal CV taking a low level, and sends a video signal taking a white level according to the control signal CV taking a high level. Send SVW. Also,
The switch 55 takes a first selected state in which the reproduced video signal SV from the VTR 11 supplied from the video signal input terminal 51 is derived to the video signal output terminal 52 in response to the control signal CS having a high level, and the switch 55 is set to the low state. In accordance with the control signal CS having the level, the second selection state in which the video signal SVB having the black level or the video signal SVW having the white level is derived from the video signal generating unit 54 to the video signal output terminal 52 is set.

Further, the adapter control unit 57 sends a control signal CO to be supplied to the printer control unit 40 in the video printer 13 to the infrared transmission section 56, and the infrared transmission section 56 modulates according to the control signal CO. The infrared ray UR thus generated is sent to the infrared ray receiving section 41 of the video printer 13.

Further, the adapter control unit 57 includes
The detection signal SB obtained from the optical sensor 47 in the video monitor 14 is supplied through the detection signal input terminal 53, and the control timing setting operation switch 58, the print preparation operation switch 59, the print image selection switch 60, and the print operation are provided. Switch 61 is connected.

Under this condition, the reproduced video signal SV is generated based on the recording signal recorded on the magnetic tape T by the VTR 11.
And the video printer 13
When the still image print operation is performed, the control timing setting operation by the video print adapter 12 is performed prior to that. In such a control timing setting operation, first, the control timing setting operation switch 58 in the video print adapter 12 is moved from the off state to the on state. In response to this, the adapter control unit 57 starts supplying the low-level control signal CV to the video signal generator 54, and also starts supplying the low-level control signal CS to the switch 55. As a result, the video signal generator 54 is set to a state in which it outputs the video signal SVB having a black level, and the switch 55 is set to the second selected state.
The video signal SVB taking the black level from the switch 55
And the video signal output terminal 52 to supply the video signal to the video signal input terminal 35 of the video printer 13.

Subsequently, the adapter control unit 57 of the video print adapter 12 causes the infrared transmitter 56 to
In the video printer 13, a control signal CO for sending the memory section 37 into a state in which one frame period of the video signal supplied thereto is fetched is sent out. The infrared transmitter 56 is an infrared UR modulated according to the control signal CO.
To the infrared receiver 41 of the video printer 13. As a result, the infrared receiver 41 of the video printer 13 receives the infrared UR from the infrared transmitter 56 of the video print adapter 12 and receives the control signal C.
O is reproduced, and the reproduced control signal CO is supplied to the printer control unit 40. The printer control unit 40 is
In response to the control signal CO, the memory unit 37 performs a writing operation for taking in one frame period of the video signal supplied from the video signal input terminal 35 and a reading operation for reading out one frame period of the taken video signal. A control signal CM for performing the above is supplied to the memory unit 37. As a result, in the memory section 37, a writing operation for taking in one frame period of the video signal supplied from the video signal input terminal 35 and a reading operation for reading out one frame period of the taken video signal are performed. However, after the infrared receiver 41 receives the infrared UR from the infrared transmitter 56 of the video print adapter 12, the memory 3
Since the write operation and the read operation in 7 are actually started with the delay time τa, the write operation and the read operation in memory unit 37 are not immediately started.

After transmitting the control signal CO to the infrared transmitter 56, the adapter control unit 57 then sets a preset initial value of, for example, 1/30 seconds, which is extremely short, which corresponds to the frame period of the video signal. When the waiting time TX, which has been set to, has passed, the transmission of the low-level control signal CV is ended, and instead, the supply of the high-level control signal CV to the video signal generation unit 54 is started. As a result, the video signal generation unit 54 is put into a state of transmitting the video signal SVW having the white level instead of the video signal SVB having the black level, and the video signal SVW having the white level is output from the video signal generation unit 54. , And is supplied to the video signal input terminal 35 of the video printer 13 through the switch 55 and the video signal output terminal 52. Adapter control unit 57
Is a high-level control signal C for the video signal generator 54.
After the transmission of V is started, a waiting time TY having a predetermined value, which is a comparatively long preset time, for example, one second, is entered.

During the waiting time TY, the infrared receiver 4
1 receives the infrared ray UR, the delay time τa elapses from when the writing operation and the reading operation in the memory unit 37 are actually started, and the writing operation and the reading operation in the memory unit 37 of the video printer 13 are performed. Is actually started, and at that time, the video signal SVB having a black level or the video signal SVW having a white level supplied from the video signal input terminal 35.
1 frame period is read into the memory unit 37, and one frame period of the captured video signal SVB having a black level or the captured video signal SVW having a white level is read from the memory unit 37. At this time, the printer control unit 40 supplies the high-level control signal CW to the switch 39, and the switch 39 is placed in the second state.

As a result, one frame period of the video signal SVB having a black level or the video signal SVW having a white level read from the memory section 37 is switched by the switch 39.
Also, it is supplied to the input terminal 45 of the video monitor 14 through the video signal output terminal 36. In the video monitor 14, the video signal SVB having a black level from the input terminal 45
Alternatively, one frame period of the video signal SVW taking the white level is supplied to the image display unit 46, and one frame of the video signal SVB taking the black level or one frame of the video signal SVW taking the white level is displayed on the display screen of the image display unit 46. Image display is performed based on the period. However, the image display in such a case is based on the video signal SVB having a black level,
The display is either a black level display over the entire display screen or a white level display over the entire display screen based on the video signal SVW that takes a white level.

At this time, from the optical sensor 47 in the video monitor 14, the detection signal SB having a low level corresponding to the black level display on the display screen of the image display unit 46, or on the display screen of the image display unit 46. A detection signal SB having a high level corresponding to the white level display at is obtained. The detection signal SB having a low level or a high level obtained from the optical sensor 47 is output terminal 48 of the video monitor 14 and the video print adapter 1.
It is supplied to the adapter control unit 57 in the video print adapter 12 through the second detection signal input terminal 53.

In the adapter control unit 57 of the video print adapter 12, whether the detection signal SB from the optical sensor 47 in the video monitor 14 has a low level or a high level after the waiting time TY has elapsed. Is determined, whether one frame period of the video signal SVB having a black level has been read from the memory unit 37 of the video printer 13 or one frame period of the video signal SVW having a white level has been read. Is determined. As a result, when it is determined that the one frame period of the video signal SVW having the white level is read from the memory unit 37, the waiting time TX is set to the above-described waiting time TX.
1 was shorter than the delay time τa required from the time when the infrared ray UR from the infrared ray transmitting section 56 was received until the writing and reading operations in the memory section 37 were actually started. Therefore, in the memory section 37, This means that the video signal SVB having the black level has not been captured or read out for one frame period.

Therefore, in the adapter control unit 57 of the video print adapter 12, the memory section 37 is provided.
When it is determined that one frame period of the video signal SVW having the white level is read from, the waiting time TX is
For example, under the control of the low level control signal C described above after being extended by a predetermined short time ΔTA which is 1/30 seconds.
The operation step in which V is supplied to the video signal generation section 54 and the video signal generation section 54 is in a state of sending out the video signal SVB having a black level and the subsequent operation steps are repeated, and the adapter control unit is again provided. In 57, whether the video signal SVB having a black level for one frame period is read from the memory unit 37, the video signal SV having a white level is read.
It is determined whether one frame period of W has been read. Then, such a series of operations is repeated until the adapter control unit 57 determines that one frame period of the video signal SVB having the black level has been read from the memory unit 37.

In this way, the video print adapter 1
In the adapter control unit 57 of No. 2, the memory unit 37
When the state where it is determined that one frame period of the video signal SVB having the black level has been read from
The waiting time TX is a short time ΔTA, which is a delay time τa required from when the infrared receiver 41 receives the infrared UR from the infrared transmitter 56 to when the writing and reading operations in the memory 37 are actually started. Is set to be approximately equal to the time obtained by adding, and thereby, the memory portion 37 has taken in and read out the video signal SVB having a black level for one frame period. Therefore, when the adapter control unit 57 determines that one frame period of the video signal SVB having the black level is read from the memory unit 37, the time obtained by subtracting the short time ΔTA from the waiting time TX at that time is Time TD (= TX that represents the control timing
-ΔTA) and store it in the built-in memory.
Then, the control signal CV from the adapter control unit 57
And the supply of CS is stopped.

Regarding the control timing represented as such time TD, a desired one frame period in the reproduced video signal SV actually obtained from the VTR 11 is taken into the memory section 37 in the video printer 13 and the still image in the image print section 38 is stopped. It is required from the time the infrared receiver 41 receives the infrared UR from the infrared transmitter 56 to the time when the writing and reading operations in the memory 37 are actually started when the image is printed out. The delay time τa is taken into consideration, and the memory unit 37 of the video printer 13 is supplied to the infrared transmitter 56 from the adapter control unit 57 prior to the arrival of a desired one frame period in the reproduced video signal SV. The state for taking in a desired one frame period of the signal SV is set. Of when the control signal CO is sent in, it is used as transmission timing.

In the above description, the initial value of the waiting time TX is set to an extremely short time of about 1/30 seconds, but the initial value of the waiting time TX may be set to zero.
When the initial value of the waiting time TX is set to zero, there is no risk of malfunction even when the delay time τa is extremely short.

In this way, the video print adapter 12
After the control timing setting operation by VTR1
When the reproducing operation for obtaining the reproduced video signal SV based on the recording signal recorded on the magnetic tape T according to No. 1 and the still image printing operation by the video printer 13 are performed, the VTR 11 is assumed to be in the normal reproducing operation mode. Under the circumstances, first, the print preparation operation switch 59 in the video print adapter 12 is shifted from the off state to the on state. In response, the adapter control unit 57 causes the switch 5 of the high level control signal CS to
Supply to No. 5 is started. As a result, the reproduced video signal SV obtained at the video signal terminal 29 of the VTR 11 is transferred to the video signal input terminal 3 of the video printer 13 through the video signal input terminal 51, the switch 55 and the video signal output terminal 52.
5 is supplied.

Subsequently, the adapter control unit 57 of the video print adapter 12 causes the infrared transmitter 56 to
The printer control unit 40 in the video printer 13 sends a control signal CO for bringing the low-level control signal CW to the switch 39. Infrared transmitter 5
6 indicates the infrared ray UR modulated according to the control signal CO,
It is sent to the infrared receiver 41 in the video printer 13. As a result, the infrared receiver 41 in the video printer 13 receives the infrared UR from the infrared transmitter 56 in the video print adapter 12, reproduces the control signal CO, and supplies the reproduced control signal CO to the printer control unit 40. . The printer control unit 40 supplies the low-level control signal CW to the switch 39 in response to the control signal CO, and the switch 39 is placed in the first state.
As a result, the video signal input terminal 35 of the video printer 13
The reproduced video signal SV supplied from the VTR 11 is supplied to the input terminal 45 of the video monitor 14 through the switch 39 and the video signal output terminal 36.

In the video monitor 14, the input terminal 45
The reproduced video signal SV from is supplied to the image display unit 46,
The reproduced video signal S is displayed on the display screen of the image display unit 46.
The image display based on each V frame period is sequentially performed. Then, the reproduced image on the display screen of the image display unit 46 is monitored, the reproduced image to be printed out as a still image is selected as the print image, and the print image selection switch 60 in the video print adapter 12 is turned on. It

Accordingly, the adapter control unit 57
Sends a control signal CX for causing the VTR 11 to enter the still reproduction operation mode to the VTR control unit 31 in the VTR 11 through the bidirectional data bus 50.
The VTR control unit 31 sends control signals CA and CB for taking the still reproduction operation mode to the mechanical control unit 32 in response to the control signal CX, and the mechanical control unit 32 causes the head servo control unit 22 and the capstan servo. The operation control signal CH and the operation control signal CP for the still reproduction operation mode are supplied to the control unit 25, respectively, whereby the image display unit 46 in the VTR 11 is supplied.
The still reproduction operation mode in which the selected print images are continuously obtained on the display screen of FIG.

Next, the adapter control unit 57 sends the VT
VT obtained by the frame counter 33 in R11
Frame number signal SN supplied to the R control unit 31
L represents the video / audio signal reproduction processing unit 27 at that time
Of the reproduced video signal SV obtained at one of the pair of output terminals of
Frame number NFX corresponding to one frame period of the reproduced video signal SV which is supplied to the image display unit 46 and forms the selected print image on the display screen. The VTR control unit 31 to the bidirectional data bus 50
And stores the number data DFN in the built-in memory.

Subsequently, the adapter control unit 57 sets the V
The VTR control unit 31 in TR11 has a frame number NFX through the bidirectional data bus 50.
In the VTR 11 in the still reproduction operation mode in which the reproduction video signal SV for the frame period is repeatedly obtained, from the reproduction video signal SV for one frame period having the frame number NFX represented by the number data DFN, the normal reproduction operation mode is determined. Control signal CX for setting the rewind reproduction operation mode for returning to a state in which the reproduction video signal SV for one frame period before the predetermined time TB, which is 10 seconds, is obtained. Is sent. V
The TR control unit 31 sends control signals CA and CB for taking the rewind reproduction operation mode to the mechanical control unit 32 in response to the control signal CX, and the mechanical control unit 32 causes the head servo control unit 22 and the capstan servo to operate. The operation control signal CH and the operation control signal CP for the rewind reproduction operation mode are supplied to the control unit 25, respectively, so that the reproduction video signal S for one frame period having the frame number NFX in the VTR 11 is supplied.
The rewind reproduction operation mode is set in which the reproduction video signal SV for one frame period before the predetermined time TB by V is obtained.

After that, the adapter control unit 57 sets the V
The VTR control unit 31 in TR11 is set in the rewind reproduction operation mode through the bidirectional data bus 50, and the one frame period before the reproduction video signal SV for one frame period having the frame number NFX by a predetermined time TB. The control signal CX for setting the normal reproduction operation mode is sent to the VTR 11 which has been returned to the state where the minute reproduction video signal SV is obtained. The VTR control unit 31 sends control signals CA and CB for taking the normal reproduction operation mode to the mechanical control unit 32 in response to the control signal CX, and the mechanical control unit 32.
Supplies the operation control signal CH and the operation control signal CP for the normal reproduction operation mode to the head servo control unit 22 and the capstan servo control unit 25, respectively, so that the VTR 11 having the frame number NFX 1 A predetermined time T from the reproduced video signal SV for the frame period
The normal reproduction operation mode in which the reproduced video signal SV for each frame period following one frame period before B is continuously obtained is adopted.

Then, the adapter control unit 57
When TR11 is in the state of taking the normal reproduction operation mode after the rewind reproduction operation mode, after the reproduction operation is started in the normal reproduction operation mode, the time TD (= TX- Δ
Time TT (= TB obtained by subtracting TA) from time TB
-TD = TD-TX + ΔTA) has elapsed, and therefore, when the reproduction operation under the normal reproduction operation mode is continued for a time TD (= TX-ΔTA), one frame having a frame number NFX At the time when the reproduced video signal SV for the period is obtained, the infrared transmitter 56 is connected to the memory unit 3 in the video printer 13.
A control signal CO is sent to bring 7 into a state in which one frame period of the reproduced video signal SV from the VTR 11 supplied through the video signal input terminal 35 is fetched.

The infrared transmitter 56 sends the infrared UR modulated according to the control signal CO to the infrared receiver 41 of the video printer 13. As a result, the infrared receiver 41 in the video printer 13 receives the infrared UR from the infrared transmitter 56 in the video print adapter 12, reproduces the control signal CO, and supplies the reproduced control signal CO to the printer control unit 40. . The printer control unit 40 responds to the control signal CO by supplying V to the memory section 37 through the video signal input terminal 35.
A control signal CM for causing the memory unit 37 to perform a write operation for fetching one frame period of the reproduced video signal SV from the TR11 and a read operation for reading one frame period of the fetched reproduced video signal SV. Supply.
As a result, when the delay time τa elapses after the infrared receiver 41 receives the infrared UR from the infrared transmitter 56 of the video print adapter 12, the memory 37 outputs the VTR 11 supplied from the video signal input terminal 35. The writing operation for fetching one frame period of the reproduced video signal SV is performed, and the reading operation for reading one frame period of the fetched reproduced video signal SV is continuously performed.

At this time, since the time TD (= TX-ΔTA) corresponds to the delay time τa, after the infrared receiver 41 receives the infrared UR from the infrared transmitter 56 in the video print adapter 12, When the delay time τa has elapsed, one frame period in the reproduced video signal SV from the VTR 11 supplied to the memory unit 37 through the video signal input terminal 35 is one frame period having the frame number NFX. Therefore, the memory unit 37
, The VTR supplied from the video signal input terminal 35
The frame number NF in the reproduced video signal SV from 11
A writing operation is performed to take in one frame period having X, that is, one frame period of the reproduced video signal SV which is supplied to the image display unit 46 and forms the selected print image on the display screen, and thereafter. The read operation for reading one frame period having the frame number NFX in the fetched reproduced video signal SV is continuously performed.

Thereafter, the adapter control unit 57 sends to the infrared transmitter 56 a control signal CO for making the printer control unit 40 of the video printer 13 supply the switch 39 with the high-level control signal CW. The infrared transmitter 56 sends the infrared UR modulated according to the control signal CO toward the infrared receiver 41 in the video printer 13, whereby the printer control unit 40 switches according to the control signal CO. 39, the high-level control signal CW is supplied to switch 39
In this state, one frame period having the frame number NFX in the reproduced video signal SV read from the memory unit 37 is the switch 39 and the video signal output terminal 3
6 is supplied to the input terminal 45 of the video monitor 14.

In the video monitor 14, the input terminal 45
Is supplied to the image display unit 46 for one frame period having the frame number NFX in the reproduced video signal SV from
The reproduced video signal S is displayed on the display screen of the image display unit 46.
The image based on one frame period having the frame number NFX in V, that is, the selected print image is displayed. After the print image on the display screen of the image display unit 46 is confirmed, the video print adapter 1
The print operation switch 61 in 2 is turned on.

Accordingly, the adapter control unit 57
In the infrared transmitter 56, in the video printer 13,
A control signal CO for sending the image print section 38 to a still image print output for one frame period having the frame number NFX in the reproduced video signal SV read from the memory section 37 is sent.

The infrared transmitter 56 sends the infrared UR modulated according to the control signal CO to the infrared receiver 41 of the video printer 13. As a result, the infrared receiver 41 in the video printer 13 receives the infrared UR from the infrared transmitter 56 in the video print adapter 12, reproduces the control signal CO, and supplies the reproduced control signal CO to the printer control unit 40. . In response to the control signal CO, the printer control unit 40 performs an operation to obtain a still image print output for the one frame period in the reproduced video signal SV read from the memory unit 37 and supplied to the image print unit 38. A control signal CT for causing the image printing unit 38 is supplied. As a result, in the image printing unit 38, a still image print output for one frame period having the frame number NFX in the reproduced video signal SV is obtained according to the control signal CT.

The adapter control unit 57 in the video print adapter 12 that performs the control operation as described above is composed of, for example, a microcomputer, and this microcomputer performs the control timing setting operation and the still image printing operation by the video printer 13. In carrying out, for example, the flowchart shown in FIG. 2 and FIG.
The programs respectively represented by the flowcharts shown in are executed.

In the program for the control timing setting operation represented by the flow chart shown in FIG. 2, first, after the start, in step 71,
The initial value of the waiting time TX is set to zero. Thereafter, in step 72, it is determined whether or not the control timing setting operation switch 58 in the video print adapter 12 has been turned on. When the control timing setting operation switch 58 is not turned on, the determination in step 72 is repeated. When the control timing setting operation switch 58 is turned on, at step 73, the low level control is performed. The supply of the signal CV to the video signal generator 54 is started, and the supply of the low-level control signal CS to the switch 55 is started.

Then, at step 74, the infrared transmitter 56 is connected to the infrared printer 56, and the memory 37 is connected to the video printer 13.
Control for causing the printer control unit 40 to output a control signal CM so that one frame period of the video signal supplied thereto is captured and one frame period of the captured video signal is read. The signal CO is sent out. Next, at step 75, it is judged if the waiting time TX is zero. As a result, if the waiting time TX is not zero, in step 76,
The built-in timer is caused to start counting time, and in the following step 77, it is judged whether or not the counting time of the timer exceeds the waiting time TX. Timer count time is waiting time TX
If it does not exceed, the judgment in step 77 is repeated. If the counting time of the timer exceeds the waiting time TX, the timer counting is stopped in step 78 and the process proceeds to step 79.

On the other hand, as a result of the judgment in step 75,
If the waiting time TX is zero, the process directly proceeds to step 79.

In step 79, the control signal CV supplied to the video signal generator 54 is changed from low level to high level. Then, in the following step 80, the built-in timer is caused to start time counting, and in step 81, it is judged whether or not the counting time of the timer exceeds the waiting time TY. Timer count time is waiting time T
If it does not exceed Y, the determination in step 81 is repeated. If the counting time of the timer exceeds the waiting time TY, the timer counting is stopped in step 82 and the process proceeds to step 83.

In step 83, the video monitor 14
Based on the detection signal SB from the optical sensor 47 in
It is determined whether or not one frame period of the video signal SVB having a black level is read from the memory unit 37 of the video printer 13. As a result, one frame period of the video signal SVB having the black level is not read from the memory unit 37, but one of the video signal SVW having the white level is read.
If the frame period has been read out, the waiting time TX is set to, for example, 1/30 in step 84.
It is increased by a predetermined short time ΔTA, which is a second. Then, in the next step 85, after changing the control signal CV supplied to the video signal generator 54 from the high level to the low level, the process returns to step 74, and the subsequent steps are sequentially performed as described above. Run.

Further, as a result of the judgment in step 83,
When one frame period of the video signal SVB having the black level is read from the memory unit 37, in step 86, the time obtained by subtracting the short time ΔTA from the waiting time TX is the time representing the control timing. TD (= TX
-ΔTA) and store it in the built-in memory.
Then, in step 87, the supply of the control signals CV and CS is stopped, and the program ends.

In the program for the still image printing operation by the video printer 13 represented by the flow chart shown in FIG. 3, after the start, first in step 91, the video print adapter 12 is started.
It is determined whether or not the print preparation operation switch 59 is turned on. As a result, when the print preparation operation switch 59 is not turned on, the determination in step 91 is repeated, and when the print preparation operation switch 59 is turned on, at step 92, the high level is set. Switch 55 for control signal CS
Supply to.

Subsequently, at step 93, the infrared transmitter 56 sends a control signal CO for setting the printer control unit 40 of the video printer 13 to supply a low level control signal CW to the switch 39. Then, in the next step 94, it is determined whether or not the print image selection switch 60 in the video print adapter 12 is turned on. As a result, when the print image selection switch 60 is not turned on,
When the print image selection switch 60 is turned on by repeating the determination in step 94, in step 95, the VTR control unit 31 in the VTR 11 causes the VTR 11 to enter the still reproduction operation mode through the bidirectional data bus 50. A control signal CX for sending.

Next, in step 96, the VTR 11
The frame number signal SNL obtained by the frame counter 33 and supplied to the VTR control unit 31 represents the reproduced video signal SV obtained at one of the pair of output ends of the video / audio signal reproduction processor 27 at that time. The frame number NFX corresponding to one frame period is fetched from the VTR control unit 31 through the bidirectional data bus 50 in the form of number data DFN and stored in the built-in memory. Then, in step 97, VT
To the VTR control unit 31 in R11, through the bidirectional data bus 50, the VTR11 in the still reproduction operation mode in which the reproduction video signal SV for one frame period having the frame number NFX is repeatedly obtained, the number data D
1 before the reproduction video signal SV for one frame period having the frame number NFX represented by FN, which is a predetermined time TB before the reproduction time in the normal reproduction operation mode.
The control signal CX for returning to the state where the reproduced video signal SV for the frame period is obtained and for setting the rewind reproduction operation mode is transmitted.

Then, in step 98, VTR1
The rewind reproduction operation mode is set to the VTR control unit 31 in No. 1 through the bidirectional data bus 50, and one frame period before the reproduction video signal SV for one frame period having the frame number NFX by a predetermined time TB. The control signal CX for setting the normal reproduction operation mode is sent to the VTR 11 which has been returned to the state where the minute reproduction video signal SV is obtained. And the following step 9
In step 9, after the built-in timer starts time measurement, in step 100, the time measured by the timer is
It is determined whether or not the time TT (= TB-TD = TD-TX + ΔTA) obtained by subtracting the time TD (= TX-ΔTA) representing the control timing stored in the built-in memory from the time TB is exceeded. As a result, when the measured time of the timer does not exceed the time TT, step 100
Repeated the judgment in, the counting time of the timer is time T
If T is exceeded, after the time measurement of the timer is stopped in step 101, in step 102,
In the infrared printer 56, the memory unit 37 of the video printer 13 is loaded with one frame period of the playback video signal SV from the VTR 11 supplied through the video signal input terminal 35, and the loaded playback video signal SV is also loaded. The control signal CO for sending the control signal CM to the printer control unit 40 is sent so that the one frame period in (1) is read out. Further, in the following step 103, the infrared transmitter 56
The printer control unit 4 in the video printer 13
0 outputs a control signal CO for setting the control signal CW of high level to the switch 39.

Thereafter, in step 104, the print operation switch 6 in the video print adapter 12 is
It is determined whether 1 is turned on. As a result, when the print operation switch 61 is turned on, in step 105, the infrared transmitter 56, the image printer 38 in the video printer 13, and the reproduction video signal read from the memory 37 are read. In order to obtain a still image print output for one frame period having the frame number NFX in the SV, a control signal CO for sending the control signal CT to the printer control unit 40 is sent, and then the video is output. Printer 13
In order to bring the reproduction control signal from the memory unit 37 into a state in which the reading for one frame period having the frame number NFX in the reproduced video signal SV is stopped,
Control signal C for stopping transmission of control signal CM to 0
Send O to terminate the program.

On the other hand, if the result of determination in step 104 is that the print operation switch 61 has not been turned on, it is determined in step 106 whether or not the timer is operating. As a result, if the timer is not operating, the timer is caused to start measuring time in step 107, and the process proceeds to step 108. If the result of determination in step 106 is that the timer is operating, the process directly proceeds to step 108.

In step 108, it is determined whether or not the time measured by the timer has exceeded a preset relatively long time TW. As a result, when the time measured by the timer does not exceed the time TW, the process returns to step 104,
If the time measured by the timer exceeds the time TW, the time measurement by the timer is stopped in step 109, and then the infrared transmitter 56 is operated in step 110.
In the video printer 13, the frame number NFX in the reproduced video signal SV from the memory unit 37 is 1
The control signal CO for stopping the transmission of the control signal CM is sent to the printer control unit 40 so that the reading for the frame period is stopped, and the program is ended.

[0064]

As is apparent from the above description, in the control timing setting device for a video printer according to the present invention, the video printer generates a black level video signal in the video signal generating section in the control unit. Of supplying the video signal from the video signal generating section to the memory section of the video printer while the video signal taking the black level is supplied from the video signal generating section. In addition to the above, the operation of sending the memory operation control signal and the operation of sending the memory operation control signal for causing the video signal supply unit of the video printer to perform the operation of supplying the video signal taken into the memory unit to the image display unit are performed. After the start, when the first waiting time elapses, the video signal generator
The operation of generating a video signal having a white level instead of the video signal having a black level and supplying it to the memory unit of the video printer, the supply of the video signal having a white level from the video signal generation unit is started. After that, when the second waiting time elapses, the display on the image display means is based on the black level writing state which is based on the video signal which takes the black level and the video signal which takes the white level. The operation of detecting which one of the white level write states is repeated is repeated with a first waiting time that is extended by a predetermined short time as long as the white level write state is detected, As a result, when the black level writing state is detected, a time obtained by subtracting a predetermined short time from the first waiting time set at that time is set as the time representing the control timing.

Under such a situation, the memory operation control signal is not sent during the first waiting time when the state in which the white level write state is detected is changed to the state in which the black level write state is detected. The time from the start to the time when the unit section of the video signal supplied to the memory unit of the video printer at that time is actually taken into the memory unit represents the time obtained by adding a predetermined short time. Therefore, when the black level write state is detected, the time that represents the control timing, which is set by subtracting a predetermined short time from the first waiting time that is set at that time, is the time of the memory operation control signal. It is the time from the start of transmission to the time when the unit section of the video signal supplied to the memory unit of the video printer at that time is actually taken into the memory unit. Therefore, prior to obtaining the print output of the desired still image to the video printer, a control signal for obtaining a state in which the unit section of the video signal for obtaining the desired image in the memory section is properly taken in. The control timing at which to send the data is set easily, properly and promptly.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a control timing setting device for a video printer according to the present invention, with a VTR, a video printer and a video monitor as a whole constituting a video signal reproduction and still image print system. It is a figure.

FIG. 2 is a flowchart showing a program executed by a microcomputer when a control unit in an example of a control timing setting device for a video printer according to the present invention is composed of a microcomputer.

FIG. 3 is a flowchart showing a program executed by a microcomputer when a control unit in an example of a control timing setting device for a video printer according to the present invention is composed of a microcomputer.

[Explanation of symbols]

 11 VTR 12 Video print adapter 13 Video printer 14 Video monitor 21A, 21B Rotary magnetic head 27 Video / audio signal reproduction processing unit 29 Video signal terminal 31 VTR control unit 32 Mechanical control unit 35, 51 Video signal input terminal 36, 52 Video signal Output terminal 37 Memory section 38 Image print section 40 Printer control unit 41 Infrared receiving section 45 Input terminal 46 Image display section 47 Optical sensor 48 Output terminal 50 Bidirectional data bus 54 Video signal generating section 56 Infrared transmitting section 57 Adapter control unit 58 Control Timing setting operation switch 59 Print preparation operation switch 60 Print image selection switch 61 Print operation switch

Claims (4)

[Claims] 1. A video signal generator for selectively transmitting a video signal having a black level and a video signal having a white level, a memory unit for taking in a predetermined unit section of the video signal, and a memory unit for taking in the unit. An image printer including an image printing unit that prints a still image based on a unit division of a video signal, and a video signal supply unit that supplies the unit division of the video signal captured in the memory unit to an image display unit. A control signal transmission unit for supplying a control signal for controlling the operation of the video printer, and a control unit for controlling the operation of the video signal generation unit and the control signal transmission unit, wherein the control unit is the video signal generation unit. A black level supply means for generating a video signal having a black level and supplying it to the memory section of the video printer; and a black level from the video signal generating section. The video signal is supplied from the video signal generating section to the memory section of the video printer, and the video signal supplying section of the video printer is provided. Control signal sending means for sending a memory operation control signal for causing the image signal taken in the memory part to be supplied to the image display means, and the memory operation control signal from the control signal sending part. When the first waiting time elapses after the transmission is started, the video signal generating section generates a video signal having a white level instead of the video signal having a black level, and the memory section of the video printer. And a white level supplying means for causing the video signal generating section to supply the video signal having the white level, and when the second waiting time elapses after the supply of the video signal having the white level is started, The display on the image display means is performed in either of the black level writing state based on the video signal having the black level and the white level writing state based on the video signal having the white level. Status determining means for detecting whether or not there is any, and when the white level writing status is detected by the status determining means, the first standby time is extended by a predetermined short time, and the black level is supplied. Means, a control signal sending means, a white level supplying means, and an operation repeating means for causing the state determining means to sequentially repeat each operation, and a setting when the black level writing state is detected by the state determining means And a time setting means for setting a time obtained by subtracting the predetermined short time from the first waiting time, which is set as a time representing a control timing, and the video pre-processing. Other control timing setting device. 2. The control timing setting device for a video printer according to claim 1, wherein the first waiting time is set to be shorter than the second waiting time. 3. The control timing setting device for a video printer according to claim 2, wherein the predetermined short time is a time corresponding to a predetermined unit section of the video signal. 4. The control timing setting device for a video printer according to claim 3, wherein an initial value of the first waiting time is set to zero.