JPH0313076A - Video signal recorder - Google Patents

Abstract

PURPOSE:To confirm a screen of a recorded video data in advance by forming a still picture video signal when a shutter key is depressed, using a switch means so as to select the still picture video signal and fetching the video signal by one picture to a recording means at a succeeding shutter key operation. CONSTITUTION:When a shutter key 13 is depressed, a luminance signal by one picture of the timing is written in a field memory 9 and a still picture luminance signal is read repetitively from the field memory 9 for each field and the picture of an object picked up at present is displayed on an electronic view finder 23. When the shutter key 13 is depressed twice within a prescribed period, the luminance signal for one picture fetched in an adaptor is recorded on a digital audio tape recorder.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to video cameras, video disc players,
The present invention relates to a video signal recording device that can select and record one screen of video signals output from a VTR or the like.

[Prior Art] The present applicant has previously developed a DAT capable of recording and reproducing a mixture of digital audio data and digital video data.
(Refer to Japanese Patent Application No. 63-315377).

In this case, the digital video data recorded is for still images.

[Problems to be Solved by the Invention] By the way, the digital video data recorded by the DAT is formed from, for example, a video signal from a video camera, but it is difficult to determine which screen the video data recorded by the DAT is from. It would be convenient if you could check in advance whether there is such a thing, since you can avoid unnecessary recording.

Therefore, it is an object of the present invention to make it possible to check the screen of video data to be recorded in advance.

[Means for Solving the Problems] The present invention includes an IS processing means for forming a still image video signal from an input video signal, and an IS processing means that selects and outputs either the input video signal or the still image video signal. a recording means to which an output signal of the switching means is supplied; a control circuit for controlling operations of the signal processing means, the switching means and the recording means; and a shutter key connected to the control circuit. It is something.

When the shutter key is pressed, the signal processing means forms a still image video word, and the switch means selects this still image video signal, and when the shutter key is pressed next, it is recorded. The video signal for one screen is taken in from the still image video signal by the means.

In the above configuration, when the shutter key 13 is pressed, the still image video signal is output from the switch means 15.22, and when the shutter key 13 is then pressed, the still image video signal is outputted by the recording means 27.2B. Since the video signal for one screen is taken in from the image video signal, the switch means 15. ．． 22 is supplied to the image display means 23, the recording means 27.
A screen corresponding to one screen of the video signal taken into the recording means 27.2B is displayed in advance, and the screen according to the video signal taken into the recording means 27.2B can be confirmed.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG.

In the same figure, l is an image sensor, for example, a CCD solid-state image sensor, and an image signal from this image sensor is supplied to a process circuit 3 via an AGC circuit 2, and from this process circuit 3, it is sent once to IB No. Y and Color difference signal (red difference signal R
-Y, blue color difference signal B-Y) is output.

Also, the luminance 1 word Y output from the process circuit 3 is γ
IJλ is supplied to an encoder 6 through a series circuit of a correction circuit 4 and an amplifier 5, and the encoder 6 multiplies and adds the same 11JI signal.

The luminance signal Y output from the encoder 6 is band-limited by a low-pass filter 7, and then converted into a digital signal by an A/D converter 8 and supplied to a field memory 9 as a write signal.

This field memory 9 is controlled by a controller 11 comprising a microcomputer via a memory control circuit IO. That is, a mode changeover switch 12 consisting of a slide switch with three contacts and a shutter key 13 consisting of a push button switch are connected to the controller 11, and are controlled as follows.

In mode 1, in which the mode switch 12 is in position b, when the shutter key 13 is pressed, a shutter trigger signal is supplied to the adapter constituting the recording means, as will be described later, and one screen worth of data is captured. The same luminance signal is written into the field memory 9.

In this case, the write data is thinned out in the field memory 9 in the vertical and horizontal directions according to the display area ratio of the child screen. For example, when the display area ratio is 1/9, writing is thinned out to 1/3 in the vertical and horizontal directions. In this way, the field memory 9 is written with a luminance signal for a still image sub-screen formed from the luminance signal for one screen taken in by the adapter.

Then, the shutter key 13 is pressed and the TDI is activated for a predetermined period.
(At least, as described above, the adapter finishes capturing the luminance signal for one screen within this period Tnl), one luminance word for the still image sub-screen is displayed in each field from the field memory 9. It is read repeatedly at the same timing. Then, after the shutter key 13 is pressed and a predetermined period Tp2 (due to this interval Tp2, the luminance signal for one screen taken into the adapter is recorded on the DAT), for example, 2 seconds, the readout is performed. will be stopped.

In mode 2, in which the mode selector switch 12 is in position C, when the shutter key 13 is pressed, the luminance signal for one screen at that timing is written into the field memory 9. In this case, the write data is written into the field memory 9 without being thinned out in the vertical and horizontal directions. In this way, a still image brightness signal consisting of a brightness signal for one screen at the timing when the shutter key 13 is pressed is written into the field memory 9.

Then, the still image luminance signal is repeatedly read out from this field memory 9 in each field.

Then, the shutter key 13 is pressed for a predetermined period Tsl.
For example, when the shutter key 13 is pressed within 2 seconds, the shutter key 13 is pressed for the second time and the luminance signal for one screen captured by the adapter within this period Ts2 is The reading is stopped after, for example, 2 seconds have elapsed (recorded as DAT). On the other hand, when the shutter key 13 is pressed and the shutter key 13 is not pressed within a predetermined period Tsl, reading is stopped after this period TsI has elapsed.

Note that when the mote selector switch 12 is in position a, even if the shutter key 13 is pressed, writing to and reading from the field memory 9 as described above is not performed.

In addition, the output signal of the field memory 9 is D/A converted @1
4 is converted into an analog signal 19 and then the changeover switch 15
is supplied to the fixed terminal on the a side. This changeover switch 15
The luminance signal Y output from the low-pass filter 7 is supplied to the fixed terminal of b III. This changeover switch 1
5 is controlled by the controller 11.

That is, in mode 1 in which the mote changeover switch 12 is in position b, the connection is made to the 1) side until the shutter key 13 is pressed and the period Tρ1 has elapsed, and the brightness signal from the camera unit is output.

Furthermore, after the period Tpl has elapsed and until the period Tl32 elapses, it is connected to the a side during the period when the still image sub-screen brightness signal is read out from the field memory 9, and is connected to blIIl during the other periods, A still image sub-screen brightness signal inserted into the brightness signal from the camera section is output. Further, after the period Tp2 has elapsed, it is connected to b[1, and the luminance signal from the camera unit is output.

In mode 2, in which the mote changeover switch 12 is in the C position, the connection is made to the l) side until the shutter key 13 is pressed, and one luminance word from the camera section is output.

Further, when the shutter key 13 is pressed, the still image luminance signal connected to the a side and read from the field memory 9 is output.

Then, the period Tsl after the shutter key 13 is pressed
When the shutter key 13 is pressed again within the same period, it is connected to alIIll until a period Ts2 has elapsed after the second shutter key 13 was pressed, and then connected to side b, and the brightness signal from the camera unit is output. be done. on the other hand,
If the shutter key 13 is not pressed within a period Tsl after the shutter key 13 is pressed, this period Tsl
It is connected to the a side until the time elapses, and then it is connected to the b side, and the brightness signal from the camera section is output.

Note that when the mode selector switch 12 is in position a, it remains connected to sword b.

Further, the color difference signal RY output from the process circuit 3,
After B - Y is quadrature two-phase modulated by the encoder 6, both color sending signals C (color subcarrier frequency is, for example, 3.58M
Hz).

This color signal C is band-limited by a bandpass filter 16, and then converted into one digital word by an A/D converter 17 and supplied to a color demodulation circuit 1. From this color demodulation circuit 18, a color difference signal R- Y, B - Y is output at point 1111 as follows.

The color difference signals R-Y and B-Y from the color demodulation circuit 18 are as follows:
The signal is supplied to the field memory 19 as a write signal. This field memory 19 is controlled by the memory control circuit 10 in the same way as the field memory 9 described above.
1 will be given.

The output signal of this field memory 19 is transmitted to the color modulation circuit 20.
The color signal C outputted from the color modulation circuit 20 is converted into an analog signal by the D/A converter 21 and then supplied to the fixed terminal on the a side of the changeover switch 22. The color signal C output from the bandpass filter 16 is supplied to the b-side fixed terminal of the changeover switch 22.

The switching of this changeover switch 22 is performed by the controller 11.
It is controlled in the same way as the changeover switch 15 described above.

In addition, the brightness signal Y output from the changeover switch 15 is
The signal is supplied to an electronic viewfinder (EVF) 23 and also to an adder 24 . Further, color No. 18 C output from the changeover switch 22 is supplied to an adder 24 and added to the luminance signal Y. The video signal output from the adder 24 is then supplied to the line output terminal 2G via the seventh amplifier 25.

Further, the video signal Sv output to the line output terminal 26 is supplied to the adapter 27.

In mode 1, when the shutter key 13 is pressed, a shutter trigger signal ST is supplied from the controller 11 to the adapter 27, and at that timing, a video signal for one screen is taken into an image memory (not shown).

When the shutter key 13 is pressed in mode 2, the period Tsl
When the shutter key 13 is pressed again within the same period, a shutter trigger signal ST is supplied from the controller 11 to the adapter 27, and at that timing, one screen worth of video signals is taken into the image memory.

Then, video data formed from the video signal for one screen is mixed with audio data formed from the audio signal SO, and this mixed data is supplied to the DAT 2B as a recording signal and recorded. In this case, one word of video for one screen is recorded over a period of, for example, two seconds.

Also, the mixed data played on DAT2B is transferred to adapter 2.
7, and the video data and audio data are separated. Then, the separated video data is 111
The video data for one screen is written into the 11th image memory and is read out repeatedly and processed to output a still image video signal SV'. Also, the separated audio data is processed and the audio signal SO is output (see Japanese Patent Application No. 63-315377).

In the above configuration, when the mode selector switch I2 is in mode l with position b, when the shutter key 13 is pressed at time 0 (as shown in FIG. 2A), the controller 11 sends the shutter trigger signal ST to the adapter 27. is supplied (as shown in C in the same figure), and the video signal for one screen is taken into the image memory of the adapter 27 (as shown in the same figure).
. In this case, the period T after the shutter key 13 is pressed
The changeover switch 15.22 is connected to the bff111, and the line output terminal 26 outputs the video signal from the camera unit (shown as [camera EE] in Figure B), and the adapter 27. A video signal from the camera unit for one screen is written into the image memory.

At this time, the subject currently being photographed is displayed on the EVF 23 (see FIG. 3A).

In this case, a still image sub-screen video signal formed from the same video signal as the video signal for one screen taken into the image memory of the adapter 27 is written into the field memory 9.19.

Furthermore, after the period Tpl has elapsed and until the period Tp2 has elapsed, the video signal for the still image sub-screen is read out from the field memory 9.19, and the changeover switch 15.22 is read out from the field memory 9 for the still image sub-screen. Movie [I! The period during which the double signal is read out is connected to the aIII, and the period of the song is connected to the b side.

Therefore, the changeover switch 15.22 outputs the video signal from the camera section with the video signal for the still image sub-screen inserted, and this is led out to the line output terminal 26 (shown as rsinPJ in FIG. 2B). ). At this time, the EVF
23, a screen in which a sub-screen of a still image is inserted is displayed (see FIG. 3B).

Further, after the period Tp2 has elapsed, the changeover switch 1
5.22 is connected to the b side, so the line output terminal 26
The video signal from the camera unit is output to (Fig. 2B)
``Camera EEI'' (illustrated).

FIG. 4 is a flowchart showing the operation of the controller 11 in mode 1 as described above.

In the figure, in step 101, the shutter key 13
If it is determined that is pressed, a shutter trigger signal ST is outputted and supplied to the adapter 27 in step 102, and one screen worth of video signal is captured.

1 missing: In step 103, it is determined whether the period Tpl has elapsed since the shutter key 13 was pressed, and when it has elapsed, in step 104, the field memory 9.19 is
and changeover switch 15.22 it, II 1all
Then, a still image sub-screen image (image signal inserted) is outputted to the line output terminal 26 in addition to the video signal from the camera section.

Next, in step 105, it is determined whether a period Tp2 has elapsed since the shutter key 13 was pressed, and when it has elapsed, in step 106, control of the field memory 9.19 and changeover switch 15.22 is performed. , the image 1ffilK from the camera section is output to the line output terminal 26. Then, the process returns to the determination in step 101.

Since the controller 11 operates as described above, after the shutter key 13 is pressed, any further pressing of the shutter key 13 will be ignored until the series of operations is completed and the process returns to step 101 again. become. In other words,
No new video signal is taken into the image memory of the adapter 27 until the video data formed from the video signal for one screen taken into the image memory of the adapter 27 is recorded by the DAT 28.

In mode 2, in which the mode selector switch 12 is in position C, when the shutter key 13 is pressed at time to (as shown in FIG. 5 A1 and FIG. 6 A), the video signal for one screen at that timing is sent to the field. Written to memory 9.19. That is, a still image video signal consisting of a video signal for one screen at the timing when the shutter key 13 is pressed is written into the field memory 9.19.

In this case, until the shutter key 13 is pressed, the selector switch 15.22 is connected to the b side, so the video signal from the camera unit is output to the line output terminal 2G (see "B" in the figure). (illustrated with camera EEI).At this time, EVF
23 displays the screen of the subject currently being photographed (see Figure 3C?).

Further, when the shutter key 13 is pressed, a still image video signal is read out from the field memory 19, and the changeover switch 15.22 is connected to the a side. Therefore, the still image video signal is output from the changeover switch 15.22, and this is led out to the line output terminal 26 (
``Still images'' are shown in Figures 5B and 6B). At this time,
A still image screen is displayed on the EVF23, as shown in Figure 3C.
reference).

Then, the period Tsl after the shutter key 13 is pressed
When the shutter key 13 is pressed again at time t1 (as shown in FIG. 5A), the controller 11 releases the adapter 2.
Shutter on 7! - The trigger signal ST is supplied (as shown in C in the same figure), and one screen worth of video No. 18 is taken into the image memory of the adapter 27 (as shown in the same figure). In this case, since the still image video signal is output to the line output terminal 26, the image memory of the adapter 27 receives one screen worth of video signal from the still image video signal. Then, after the period Ts2 has elapsed since the shutter key 13 was pressed for the second time, the selector switch 15.22 is connected to the b side, so the line output terminal 26 receives the video signal from the camera section. It is output (shown as "camera EE" in FIG. 5B).At this time, the subject being photographed is displayed on the EVF 23 (see FIG. 3A).

On the other hand, if the shutter key 13 is not pressed within the interval Tsl after the shutter key 13 is pressed, the selector switch 15.22 is connected to the b side after this period Tsl has elapsed, so that the line output terminal 26 is connected to the line output terminal 26. , the video signal from the camera section is output (see Figure 6B for "Camera EE").
). At this time, the subject currently being photographed is displayed on the EVF 23 (see FIG. 3A).

FIG. 7 is a flowchart showing the operation of the controller 11 in mode 2 as described above.

In the figure, in step 201, the shutter key 13
If it is determined that is pressed, step 202 causes the field memory 9.19 and the changeover switch 15.22 to be pressed.
As a result, a still image video signal is output to the line output terminal 26.

Next, in the step 203, it is determined whether the period Tsl has elapsed since the shutter key 13 was pressed, and when it has elapsed, in step 204, the field memories 9, 19 and the switch 15, 22 are controlled. A video signal from the camera section is output to the line output terminal 26. Then, the process returns to the determination in step 201.

Further, when it is determined in step 203 that the period Tsl has not elapsed, it is determined in step 205 whether the shutter key 13 is pressed.

If it has not been pressed, the process returns to step 203.

When pressed, a shutter trigger signal ST is outputted and supplied to the adapter 27 in step 206;
1 screen worth of footage! ! A signal is captured. Then, in step 207, it is determined whether a period Ts2 has elapsed since the shutter key 13 was pressed for the second time, and if it has elapsed, the process proceeds to step 204.

Since the controller 11 operates as described above, after the shutter key 13 is pressed for the second time, until the series of operations is completed and the process returns to Step 201, I'11 is turned off.
Even if the shutter key 13 is pressed again, it will be ignored. In other words, the video data formed from one screen worth of video No. 1g imported into the image memory of the adapter 27 is
No new video signal is taken into the image memory of the adapter 27 until it is recorded by the AT 28.

Note that when the mode changeover switch 12 is in the position a, the changeover switch 15.22 remains connected to the b side, and the video signal from the camera section is output to the line output terminal 26.

In this way, according to this example, the mote 1 and the shutter key 1
When 3 is pressed, a sub-screen of a still image is displayed on the EVF 23 based on the video signal for one screen that is captured in the image memory of the adapter 27 and recorded on the DAT 28.
It is possible to easily check whether a video signal of a screen like the above is recorded on the AT2B. Furthermore, for the same reason, it can be confirmed that the video signal recording operation is being performed.

In this case, after the video signal for one screen is taken into the adapter 27, the changeover switch 15゜22 outputs the video signal from the camera section with the video signal for the sub-screen inserted. Therefore, there is no possibility that the adapter 27 receives the video signal with the sub-screen video signal inserted.

When the shutter key 13 is pressed in mode 2, a still image video signal is output to the line output terminal 2G, and the shutter key 13 is pressed again within a predetermined period Tsl.
When is pressed, the adapter 27 receives one screen worth of video signal from the still image video signal. In other words, EVF23
When the switch key 13 is pressed for the first time, the DA
A screen corresponding to one screen of video 19 signals recorded on T2B is displayed, and a screen corresponding to one video word recorded on DAT2B can be confirmed in advance. This makes it possible to avoid unnecessary recording.

In the above-described embodiment, the input video signal is the video signal from the camera section, but it may also be the video signal from an image reproducing device for the song, such as a video disc player or VTR.

Furthermore, in the above-mentioned embodiment, the small screen display of Mo1:I and the still image display of Mote 2 are automatically canceled, but they may be manually canceled as desired. .

Further, in the above embodiment, the configuration of the adapter 27 and the DAT 28 is shown as the recording means, but other recording means such as a disk recording device, a VTR, etc. may be used.

[Effects of the Invention] As explained above, according to the present invention, when the shutter key is pressed, the still image image 13 is output from the switch means.
When the number is output and the shutter key is pressed next, the recording means captures one screen worth of video signal from the still image video No. 13, so if the output signal of the switch means is supplied to the image display means, A screen corresponding to one screen of the video signal taken into the recording means is displayed, and the screen according to the video signal taken into the recording means can be confirmed in advance. This makes it possible to avoid unnecessary recording.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2 to 7 are diagrams for explaining the same. 9゜1 5゜ - 3・6・91 1 Oψ I 1 12 #34 22 ・TA image element・process circuit *Encoder・field memory・memory control circuit・controller・mode changeover switch・shutter key・changeover switch 23・26 ・ 27 ・ 28 ・ ・Electronic viewfinder line output terminal ◆ Adapter DAT EVF display screen Figure 3 Operation explanation of mode l Figure 4

Claims (1)

[Claims] (1) A signal processing means for forming a still image video signal from an input video signal, a switch means for selecting and outputting either the input video signal or the still image video signal, and an output signal of the switch means. A control circuit for controlling the operation of the signal processing means, the switch means and the recording means, and a shutter key connected to the control circuit, and when the shutter key is pressed, the signal processing is performed. The means forms a still image video signal, the switch means selects this still image video signal, and then when the shutter key is pressed, the recording means records one screen from the still image video signal. A video signal recording device characterized in that a video signal of 20 minutes is captured.