JP2667711B2 - Video signal recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a video signal recording apparatus capable of selecting and recording an arbitrary one screen from a video signal output from a video camera, a video disc player, a VTR or the like. Regarding

[Prior Art] The present applicant has previously proposed that a DAT capable of mixing and recording digital audio data with digital video data for recording and reproduction.
(Digital audio tape recorder) (see Japanese Patent Application No. 63-315377).

In this case, the digital video data to be recorded is for a still image.

[Problems to be Solved by the Invention] By the way, digital video data recorded by DAT in this way is formed from, for example, a video signal from a video camera. If it can be confirmed in advance, it is convenient because unnecessary recording can be avoided.

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

[Means for Solving the Problems] The present invention relates to a signal processing unit for forming a still image video signal from an input video signal, and a switch unit for selecting and outputting either the input video signal or the still image video signal. When,
Recording means to which the output signal of the switch means is supplied; image display means for displaying an image based on the output signal of the switch means; signal processing means; a control circuit for controlling the operation of the switch means and the recording means; And a shutter key connected to the circuit.

When the shutter key is pressed, the control circuit forms a still image video signal in the signal processing means, and the switch means selects the still image video signal. The recording means captures a video signal for one screen from the video signal for a still image.

[Operation] In the above configuration, when the shutter key 13 is pressed, a video signal for a still image is output from the switch means 15 and 22, and when the shutter key 13 is pressed next, the recording means 2 is pressed.
At 7 and 28, a video signal for one screen is captured from the video signal for a still image. If the output signal of the switch means 15 and 22 is supplied to the image display means 23, 1 is captured by the recording means 27 and 28. A screen by the video signal for the screen is displayed in advance, and the recording means 2
You can check the screen by the video signal taken in 7,28.

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

In FIG. 1, reference numeral 1 denotes an image sensor, for example, a CCD solid-state image sensor.
The luminance signal Y and the color difference signals (red color difference signal RY, blue color difference signal BY) are supplied from the process circuit 3 to the process circuit 3.

The luminance signal Y output from the process circuit 3 is γ
The signal is supplied to an encoder 6 via a series circuit of a correction circuit 4 and an amplifier 5, and a synchronization signal is added by the encoder 6.

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

The field memory 9 is controlled by a controller 11 having a microcomputer via a memory control circuit 10. That is, the controller 11 is connected to a mode changeover switch 12 composed of a three-contact slide switch and a shutter key 13 composed of a push button switch, and is controlled as follows.

In the mode 1 in which the mode changeover switch 12 is set to the position b, when the shutter key 13 is pressed, a shutter trigger signal is supplied to an adapter constituting storage means and the luminance of one screen is taken in as described later. The same signal is written to the field memory 9.

In this case, the write data is written to the field memory 9 in the vertical direction and the horizontal direction in accordance with the display area ratio of the child screen. For example, when the display area ratio is 1/9, 1 in the vertical and horizontal directions
It is written down to / 3. As described above, the luminance signal for a still picture screen formed from the luminance signal for one screen captured by the adapter is written in the field memory 9.

Then, the shutter key 13 is pressed for a predetermined period Tp1.
After the lapse of at least the luminance signal for one screen in the adapter as described above within this period Tp1, the luminance signal for the still picture screen is read from the field memory 9 at the display timing of each field. It is repeatedly read. Then, the shutter key 13 is pressed for a predetermined period.
The reading is stopped after Tp2 (a luminance signal for one screen captured by the adapter during this period Tp2 is recorded by DAT), for example, after 2 seconds have elapsed.

In the mode 2 in which the mode changeover switch 12 is set to the position c, when the shutter key 13 is pressed, a luminance signal for one screen at that timing is written in the field memory 9. In this case, the write data is written to the field memory 9 without being thinned in the vertical and horizontal directions. As described above, the still image luminance signal composed of the luminance signal for one screen at the timing when the shutter key 13 is pressed is written in the field memory 9.

Then, a still image luminance signal is repeatedly read from this field memory 9 in each field. Then, when the shutter key 13 is pressed within a predetermined period Ts1, for example, 2 seconds after the shutter key 13 is pressed, the shutter key 13 is pressed a second time, and the shutter key 13 is pressed for a predetermined period Ts2 (taken by the adapter during this period Ts2). The read luminance signal for one screen is recorded by DAT, for example, reading is stopped after elapse of 2 seconds. On the other hand, the shutter key 13 is pressed for a predetermined period Ts
If the shutter key 13 is not pressed within 1, the reading is stopped after this period Ts1 has elapsed.

When the mode changeover switch 12 is set to the position a, writing and reading to and from the field memory 9 as described above are not performed even if the shutter key 13 is pressed.

The output signal of the field memory 9 is supplied to the D / A converter 14.
After being converted to an analog signal by the switch, the signal is supplied to the fixed terminal on the a side of the changeover switch 15. The luminance signal Y output from the low-pass filter 7 is supplied to a fixed terminal on the b side of the changeover switch 15. The switching of the changeover switch 15 is controlled by the controller 11.

That is, in the mode 1 in which the mode changeover switch 12 is set to the position b, the shutter key 13 is pressed for a period of time.
Until Tp1 elapses, it is connected to the b side, and a luminance signal is output from the camera unit. Further, after the elapse of this period Tp1 and until the elapse of the period Tp2, the pixel is connected to the a side during a period in which the still picture luminance signal for the still picture screen is read from the field memory 9, and is connected to the b side during the other periods. Then, a signal obtained by inserting a luminance signal for a still picture sub-screen into a luminance signal from the camera unit is output. Further, after the lapse of the period Tp2, the brightness signal is output from the camera unit by being connected to the b side.

In the mode 2 in which the mode switch 12 is set to the position c, the switch is connected to the side b until the shutter key 13 is pressed, and a luminance signal is output from the camera unit. Also,
When the shutter key 13 is pressed, it is connected to the a side, and a still image luminance signal read from the field memory 9 is output. Then, when the shutter key 13 is pressed again within the period Ts1 after the shutter key 13 is pressed,
After the shutter key 13 is pressed for the second time, it is connected to the a side until the period Ts2 elapses, and then connected to the b side,
A luminance signal is output from the camera unit. On the other hand, after the shutter key 13 is pressed, the shutter key 13
When is not pressed, a until the time Ts1 elapses.
Side, and then connected to the b side to output a luminance signal from the camera unit.

When the mode selector switch 12 is set to the position a, it remains connected to the side b.

Further, the color difference signals RY,
BY is subjected to quadrature two-phase modulation by the encoder 6 and then output as a carrier chrominance signal C (color subcarrier frequency is, for example, 3.58 MHz).

The color signal C is band-limited by a band-pass filter 16, converted into a digital signal by an A / D converter 17, and supplied to a color demodulation circuit 18. The color demodulation circuit 18 outputs color difference signals RY, B −Y is output in dot sequence.

The color difference signals RY and BY from the color demodulation circuit 18 are supplied to the field memory 19 as write signals. The field memory 19 is controlled by the memory control circuit 10 in the same manner as the field memory 9 described above.

The output signal of the field memory 19 is supplied to a color modulation circuit 20 and modulated. The color signal C output from the color modulation circuit 20 is converted into an analog signal by a D / A converter It is supplied to the fixed terminal on the a side. A color signal C output from the band pass filter 16 is supplied to a fixed terminal on the b side of the changeover switch 22.

The switching of the changeover switch 22 is controlled by the controller 11 in the same manner as the changeover switch 15 described above.

The luminance signal Y output from the changeover switch 15 is
It is supplied to an electronic viewfinder (EVF) 23 and to an adder 24. The color signal 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 supplied to a line output terminal 26 via an amplifier 25.

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 the mode 2 and the shutter key 13 is pressed again within the period Ts1, the controller 11
The shutter trigger signal ST is supplied to the adapter 27 from the
At that timing, a video signal for one screen is taken into the image memory.

Then, the video data formed from the video signal for one screen is mixed with the audio data formed from the audio signal So, and the mixed data is supplied to the DAT 28 as a recording signal and recorded. In this case, a video signal for one screen is recorded with a time of, for example, 2 seconds.

Further, the mixed data reproduced by the DAT 28 is supplied to the adapter 27, and the video data and the audio data are separated. Then, the separated video data is sequentially written into the image memory to form one screen, and the video data for one screen is repeatedly read and processed, and the still image video signal Sv 'is output. In addition, the separated audio data is processed and an audio signal So is output (Japanese Patent Application No. 63
−315377).

In the above configuration, in the mode 1 in which the mode changeover switch 12 is set to the position b, when the shutter key 13 is pressed at the time point to (shown in FIG. 2A), the controller 11
A shutter trigger signal ST is supplied to the adapter 27 (shown in FIG. C), and a video signal for one screen is taken into the image memory of the adapter 27 (shown in FIG. D). In this case, in the period Tp1 after the shutter key 13 is pressed, the changeover switches 15 and 22 are connected to the b side, and the line output terminal 26
Since a video signal is output from the camera unit (shown as “camera EE” in FIG. B), the video signal from the camera unit is written into the image memory of the adapter 27 for one screen. At this time, the subject currently being photographed is displayed on the EVF 23 (see FIG. 3A).

In this case, the field memories 9 and 19 contain an adapter.
A video signal for a still picture screen formed from the same video signal as the video signal for one screen fetched into the image memory 27 is written.

Further, after the period Tp1 elapses and until the period Tp2 elapses, the video signal for a still picture screen is read from the field memories 9 and 19, and the changeover switches 15 and 22 are read from the field memory 9 for the still picture screen. The video signal is connected to the a side during a period during which the video signal is read, and is connected to the b side during the other periods. Therefore, from the changeover switches 15 and 22, a video signal from the camera unit in which the video signal for still picture screen is inserted is output, and this is led out to the line output terminal 26 ("SinP" in FIG. 2B). (Illustrated in). At this time, the EVF 23 displays a screen in which the still picture child screen has been inserted (see FIG. 3B).

After the elapse of the period Tp2, the changeover switch 15,
Since 22 is connected to the b side, a video signal from the camera unit is output to the line output terminal 26 (shown as “camera EE” in FIG. 2B).

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

In the figure, when it is determined in step 101 that the shutter key 13 is pressed, in step 102, a shutter trigger signal ST is output and supplied to the adapter 27, and
Video signals for the screen are captured.

Next, in step 103, it is determined whether or not the period Tp1 has elapsed since the shutter key 13 was pressed, and when it has elapsed, in step 104, the field memories 9, 19 and the changeover switches 15, 22 are controlled, and the line T The output terminal 26 outputs the video signal from the camera unit into which the video signal for still picture screen is inserted.

Next, in step 105, it is determined whether or not the period Tp2 has elapsed since the shutter key 13 was pressed, and when it has elapsed, in step 106, the field memories 9, 19 and the changeover switches 15, 22 are controlled, and the line The output terminal 26 outputs a video signal from the camera unit. Then, the process returns to the determination of step 101.

Since the controller 11 operates as described above, after the shutter key 13 is pressed, the shutter key 1 is again pressed until a series of operations is completed and the judgment returns to step 101 again.
Pressing 3 will be ignored. That is, a new video signal is not taken into the image memory of the adapter 27 until the video data formed from the video signal of one screen taken into the image memory of the adapter 27 is recorded by the DAT 28.

In the mode 2 in which the mode changeover switch 12 is set to the position c, when the shutter key 13 is pressed at the time point to (shown in FIGS. 5A and 6A), a video signal for one screen at that timing is generated. The data is written to the field memories 9 and 19. That is, a still image video signal composed of a video signal for one screen at the timing when the shutter key 13 is pressed is written in the field memories 9 and 19.

In this case, since the changeover switches 15 and 22 are connected to the side b until the shutter key 13 is pressed, a video signal is output from the camera unit to the line output terminal 26 (see “Camera” in FIG. EE]) At this time, the EVF 23 displays the screen of the subject that is currently being shot (see FIG. 3A).

When the shutter key 13 is pressed, the still image video signal is read from the field memories 9 and 19, and the changeover switches 15 and 22 are connected to the a side. Therefore, video signals for still images are output from the changeover switches 15 and 22 and are led out to the line output terminal 26 (shown as "still image" in FIGS. 5B and 6B). At this time, a still image screen is displayed on the EVF 23 (see FIG. 3C).

Then, when the shutter key 13 is pressed again at time tl within the period Ts1 after the shutter key 13 is pressed (fifth
A, a shutter trigger signal ST is supplied from the controller 11 to the adapter 27 (shown in FIG. C), and a video signal for one screen is taken into the image memory of the adapter 27 (shown in FIG. D). ). In this case, since a still image video signal is output to the line output terminal 26, the image memory of the adapter 27 receives a video signal for one screen 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 changeover switches 15 and 22 are connected to the b side, so that the line output terminal 26 receives the video signal from the camera unit. It is output (illustrated as “camera EE” in FIG. 5B), and at this time, the subject that is 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 period Ts1 after the shutter key 13 is pressed,
After the time elapses, the changeover switches 15 and 22 are connected to the b side, so that a video signal is output from the camera unit to the line output terminal 26 (shown as "camera EE" in FIG. 6B). 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, when it is determined in step 201 that the shutter key 13 is pressed, in step 202, the field memories 9, 19 and the changeover switches 15, 22 are controlled, and the line output terminal 26 is A video signal for a still image is output.

Next, in step 203, it is determined whether or not the period Ts1 has elapsed since the shutter key 13 was pressed. When the time has elapsed, in step 204, the field memories 9, 19 and the changeover switches 15, 22 are controlled, and the line The output terminal 26 outputs a video signal from the camera unit. Then, the process returns to the determination in step 201.

When it is determined in step 203 that the period Ts1 has not elapsed, in step 205, the shutter key 13
It is determined whether is pressed. If not, the process returns to step 203. If it is depressed, in step 206, a shutter trigger signal ST is output and supplied to the adapter 27, and a video signal for one screen is captured.
Then, in step 207, it is determined whether or not the period Ts2 has elapsed since the second time the shutter key 13 was pressed.

Since the controller 11 operates as described above, after the shutter key 13 is pressed for the second time, even if the shutter key 13 is pressed again, it is ignored until a series of operations is completed and the process returns to the determination of step 201 again. Will be done. That is, a new video signal is not taken into the image memory of the adapter 27 until the video data formed from the video signal of one screen taken into the image memory of the adapter 27 is recorded by the DAT 28.

When the mode changeover switch 12 is set to the position a, the changeover switches 15 and 22 remain connected to the b side, and the line output terminal 26 outputs a video signal from the camera unit.

Thus, according to this example, the shutter key is
When the button 13 is pressed, a still picture sub-screen is displayed on the EVF 23 by a video signal for one screen which is taken into the image memory of the adapter 27 and recorded by the DAT 28. Can be easily confirmed. Further, it can be confirmed that the video signal recording operation is being performed for the same reason.

In this case, after the video signal for one screen is captured by the adapter 27, the changeover switches 15 and 22 output the video signal from the camera unit with the video signal for the small screen inserted. Therefore, there is no possibility that the video signal in which the sub-screen video signal is inserted is taken into the adapter 27.

When the shutter key 13 is pressed in mode 2, a still image video signal is output to the line output terminal 26, and when the shutter key 13 is pressed again within the predetermined period Ts1, the still image is output to the adapter 27. A video signal for one screen is captured from the video signal for use. That is, when the shutter key 13 is first pressed on the EVF 23, a screen based on the video signal for one screen recorded on the DAT 28 is displayed, and the screen based on the video signal recorded on the DAT 28 can be checked in advance. Thereby, unnecessary recording can be avoided.

In the above embodiment, the input video signal is a video signal from the camera unit. However, the input video signal may be a video signal from another image reproducing device such as a video disc player or a VTR.

In the above-described embodiment, the small-screen display in mode 1 and the still image display in mode 2 are automatically canceled. However, the small-screen display in mode 2 may be manually canceled arbitrarily.

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 and a VTR may be used.

[Effects of the Invention] As described above, according to the present invention, when the shutter key is pressed, a video signal for a still image is output from the switch means, and an image based on the video signal for a still image is output to the image display means. Is displayed, the image based on the still image video signal can be easily confirmed immediately, and it can be easily determined whether or not to record in the recording means. Next, when the shutter key is pressed, the recording means captures a video signal for one screen from the still picture video signal. Can be recorded.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2 to 7 are views for explaining the embodiment. DESCRIPTION OF SYMBOLS 1 ... Image sensor 3 ... Process circuit 6 ... Encoder 9, 19 ... Field memory 10 ... Memory control circuit 11 ... Controller 12 ... Mode changeover switch 13 ... Shutter key 15, 22 ... Changeover switch 23 …… Electronic viewfinder 26 …… Line output terminal 27 …… Adapter 28 …… DAT

Claims (1)

(57) [Claims] 1. A signal processing means for forming a still picture video signal from an input video signal, a switch means for selecting and outputting one of the input video signal and the still picture video signal, and an output of the switch means A recording unit to which a signal is supplied; an image display unit for displaying an image based on an output signal of the switch unit; a control circuit for controlling operations of the signal processing unit, the switch unit and the recording unit; A shutter key to be connected, when the shutter key is pressed, the control circuit forms a video signal for a still image in the signal processing means, and selects the still image video signal in the switch means. When the shutter key is pressed, the control circuit takes in the video signal for one screen from the video signal for the still image by the recording means. And a video signal recording device.