JPH02301268A - Video signal processing unit - Google Patents

Abstract

PURPOSE:To monitor a picture wiped or faded at the editing functioning such as wiping or fading by providing a control means making a 1st coefficient of a 1st coefficient multiplication means equal to a 2nd coefficient of a 2nd coefficient multiplication means prior to the recording of a video signal to the unit. CONSTITUTION:Prior to the recording of a video signal in a recording means 9, a control means 10 is provided, which makes a 1st coefficient of a 1st coefficient multiplication means 4a equal to a 2nd coefficient of a 2nd coefficient multiplication means 4b. Thus, prior to recording a video signal onto a recording medium, the video signal being the mixture of the 1st and 2nd video signals is displayed to confirm the content of the 1st and 2nd video signals. Thus, each picture subject to wipe or fade is easily monitored at the editing function of wipe or fade.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal processing device that processes video signals.

[Prior Art] As a method for switching between a plurality of types of images on a screen, devices have been known that use special effects such as wipes or fades to switch between images.

Furthermore, recently, devices have been appearing in which a video camera and a recording device are integrated, and which are equipped with editing functions such as wiping or fading the video as described above.

[Problems to be Solved by the Invention] However, the above-mentioned device includes, for example, a memory circuit, stores an arbitrary still image in the memory circuit in advance, and stores the still image stored in the memory circuit in advance. Wipe or fade can be achieved by sequentially switching the corresponding video signal and the video signal corresponding to the subject image formed in the video camera section by changing the switching timing, or by sequentially changing the mixing ratio and mixing them and outputting them. Special effects are being done.

By the way, while performing the above-mentioned special effects, the equipment's E
The electric view finder (EVF) is designed to display the state of the special effect, but when the special effect starts, the EVF displays a still image stored in the memory circuit within the device. However, it was not possible to monitor the image using the EVF that corresponds to the video signal generated by the video camera, making it inconvenient to use.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a video signal processing device capable of monitoring each image that is wiped or faded during an editing function such as wipe or fade.

[Means for Solving the Problem] The video signal processing device of the present invention includes a first coefficient multiplier that multiplies a first video signal by a first coefficient, and a second coefficient multiplier that multiplies a second video signal by a second coefficient. a second coefficient multiplication means, mixing the output of the first coefficient multiplication means and the output of the second coefficient multiplication means;
a mixing means for outputting an output; and a display means for displaying an image corresponding to the video signal output by the mixing means.

recording means for recording the video signal output by the mixing means on a recording medium; and prior to the recording operation of the video signal in the recording means, the first coefficient of the first coefficient multiplication means and the second coefficient multiplication means. and a control means for setting the second coefficient to the same value.

[Function] According to the above configuration, before recording the video signal on the recording medium, by displaying the mixed video signal and the mixed video signal of the first video signal and the second video signal, It becomes possible to check the contents of the video signal and the second video signal.

[Example] Hereinafter, the present invention will be explained using examples of the present invention.

FIG. 1 is a block diagram showing a schematic configuration of a video signal processing device as an embodiment of the present invention, and FIG. 2 is a timing chart for explaining the operation of the device shown in FIG.

In FIG. 1, 1 is a video camera unit that forms and outputs a video signal by imaging a subject, 2 is an analog-to-digital (A/D') converter that converts an analog video signal into a digital video signal, and 3 A field memory 4a is capable of storing one field's worth of digital video signals.

4b is a coefficient multiplier, 5 is a full adder, 6 is a digital-to-analog converter that converts a digital video signal to an analog video signal, 7 is a changeover switch, 8 is an electronic viewfinder (EVF), and 9 is an input video A recording unit records signals on a recording medium, 10 is a system controller that controls the operation of each circuit, and 11 is an operation unit that instructs the system controller to perform each operation.

In FIG. 1, by first operating the operating section 11,
When the system controller 10 is instructed to start normal imaging recording operation, the system controller 10 operates the video camera unit 1, EVF 8, and recording unit 9, connects the changeover switch 7 to the A side in the figure, and The EVF converts the video signal corresponding to the subject image output from the camera unit l to the EVF.
8 and a recording section 9.

The EVF 8 displays an image corresponding to the subject being imaged by the video camera section 1, and the recording section 9 stores the video signal output from the video camera section 1 on a recording medium (not shown). Record.

Furthermore, when the wipe or fade operation is selected in the operation section 11 as shown in FIG. The converter 6 and the EVF 8 are operated, and the control signal (b) output to the changeover switch 7 is set to high level (H) (see FIG. 2(b)),
Switch the changeover switch 7 from side A to side B in the figure.

At this time, the system controller IO outputs coefficient data representing the coefficient "l" to the coefficient multiplier 4a (see FIGS. 2(d) and (f)), and the coefficient multiplier 4b outputs the coefficient "0".
(Figure 2(e), (
(see g)).

Through the above-described operation, the output from the video camera section l is digitized by the A/D converter 2, and then,
The video signal multiplied by the coefficient "l" in the coefficient multiplier 4a is added to the signal multiplied by the coefficient "0" in the coefficient multiplier 4b in the full adder 5, and then sent to the D/A converter 6. The video signal supplied and converted into analog by the D/A converter 6 is supplied to the EVF 8 via the changeover switch 7, and the image indicated by the video signal output from the video camera section 1 is displayed on the EVF 8. Become.

Next, as shown in FIG. 2(a), when an image storage operation is instructed on the operation unit 11, the system controller lO
The control signal (C
) changes from high level ( ) ( ) to low level (L) for one field period as shown in FIG. During the period, the memory state becomes IE, and the video signal output from the video camera section 1 and digitized by the A/D converter 2 is stored for one field, and after the video signal for 1 field or 8 minutes is stored, When the control signal (C) becomes high level (H), the video signal stored in the field memory 3 is read out repeatedly.

Also, at this time, the system controller 10 outputs coefficient data representing the coefficient "0" to the coefficient multiplier 4a (
(see FIGS. 2(d) and (f)), the coefficient "
Coefficient data representing "l" is output (see Figure 2 (e)
), (see (g)), the video signal read from the field memory 3 and multiplied by a coefficient "1" in the coefficient multiplier 4b is combined with the signal multiplied by a coefficient "0" in the coefficient multiplier 4a and the full adder 5. The video signal is added to the D/A converter 6, converted into an analog video signal by the D/A converter 6, and is supplied to the EVF 8 via the changeover switch 7. A still image indicated by the video signal will be displayed.

As described above, the still image indicated by the video signal read from the field memory 3 is displayed on the EVF 8 for a predetermined period after the image storage operation is instructed by the operation unit 11, and thereafter, the still image is displayed on the EVF 8 from the operation unit 11 to the system controller 10. The mixing operation is instructed.

Then, when the system controller 1O is instructed by the operation unit 11 to perform a mixing operation, the system controller 1O sends a coefficient "0.5" to the coefficient multiplier 4a.
Figure 2 (d) and (f)
), the coefficient data representing the coefficient "0.5" is output to the coefficient multiplier 4b. , and further, the coefficient "0" is set in the coefficient multiplier 4a.
．． The video signal multiplied by 5" is read out from the field memory 3, and is further multiplied by a coefficient of 0 in the coefficient multiplier 4b.
．． The full adder 5 adds the video signal multiplied by 5'' and mixes the signal.

The mixed video signal is then supplied to the D/A converter 6, converted into an analog signal by the D/A converter 6, and then supplied to the EVF 8 via the changeover switch 7. An image represented by a mixed video signal in which the output video signal and the still image signal stored in the field memory 3 are mixed is displayed.

The above operation allows the operator to confirm that wipe or fade operation has been selected, and also allows the operator to monitor the image captured during wipe or fade recording using the EVF. After determining whether the captured image is to be wiped or faded recorded by the above-described operation, the operator operates the operation unit 11 to instruct the system controller lO to start wipe recording or fade recording, as shown in FIG. instruct.

When the start of wipe or fade recording is instructed in the operation unit 11, the system controller 10 operates the recording unit 9 and changes the timing of switching the combination of coefficient data supplied to the coefficient multipliers 4a and 4b to wipe or fade. By changing the l-field period according to the type of operation (see Figure 2 (d) to (g))
, D/A converter 6 is supplied with a digital image signal that has been subjected to wipe or fade processing using a still image signal, and after being converted to analog there, is sent via changeover switch 7 to EVF 8 . The image is supplied to the recording section 9, and the wiped or faded image is displayed on the EVF 8, and is also recorded on a recording medium in the recording section 9.

Furthermore, the above-mentioned wipe or fade processing operation will be explained in detail using FIGS. 3, 4, and 5.

Figure 3 shows an operation timing chart when performing a wipe operation in the horizontal direction, where (a) is the horizontal synchronization signal, (
b) is a coefficient multiplier 4a from the system controller 10;
The combination of coefficient data supplied to 4b, (C) is E
This shows a horizontal wipe image displayed on the screen of VF8.

Now, let X be the coefficient of the coefficient data supplied from the system controller IO to the coefficient multiplier 4a, and let Y be the coefficient of the coefficient data supplied to the coefficient multiplier 4b, and the combination of coefficient data is (x).

Y), the combination of coefficient data output from the system controller 10 in the case of horizontal wipe recording is synchronized with the horizontal synchronization signal shown in FIG.
), the combination of coefficient data assigned to each horizontal scanning period in each field period is the same, and by changing from (1, 0) to (0, 1) in the field period, the result shown in Fig. 3 (C) is obtained. The horizontal wipe image shown is displayed on the EVF 8 and is also recorded on the recording medium.

Further, FIG. 4 shows an operation timing chart when performing a wipe operation in the vertical direction, in which (a) is a vertical synchronization signal, and (b) is a signal supplied from the system controller 10 to the coefficient multipliers 4a and 4b. combination of coefficient data,
(e) shows a vertical wipe image displayed on the screen of the EVF8.

Similarly to the above, the combination of coefficient data output from the system controller 10 is (X).

Y), the combination of coefficient data output from the system controller 10 in the case of vertical wipe recording is synchronized with the vertical synchronization signal shown in FIG. 4(a),
), by changing the ratio of the coefficient data combinations (1, O) and (0, l) assigned to each horizontal scanning period in the field period, the vertical wipe image shown in Fig. 4 (C) is created. will be displayed on the EVF 8 and will also be recorded on the recording medium.

Moreover, FIG. 5 shows an operation timing chart when performing a fade operation, and (a) shows the vertical synchronization signal,
(b) is the coefficient multiplier 4a from the system controller IO.
(C) shows coefficient data supplied from the system controller 10 to the coefficient multiplier 4b.

In the case of fade recording, the coefficient data supplied from the system controller 10 to the coefficient multiplier 4a is synchronized with the vertical synchronization signal shown in FIG. The values of the coefficient data assigned to the horizontal scanning period are set equally, and are changed from "0" to "1" in the field period.
By changing the coefficient data supplied from the system controller IO to the coefficient multiplier 4b from "1.0" to "O", the fade image becomes
It will be displayed on the computer and also recorded on the recording medium.

As explained above, in the video signal processing device of this embodiment, when recording a wipe or fade of a video signal, it is possible to confirm on the EVF that the wipe or fade recording is selected. At the same time, you can check the image of the subject being captured by the video camera at that time, and you can also check the wipe or fade image that is being recorded, making it extremely easy to use. ing.

[Effects of the Invention] As described above, the present invention provides a video signal processing device that can easily monitor each image that is wiped or faded during the wipe or fade editing function. You will be able to do things.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a video signal processing device as an embodiment of the present invention. FIG. 2 is a timing chart for explaining the operation of the apparatus shown in FIG. 1. FIG. 3 is an operation timing chart during a horizontal wipe operation. FIG. 4 is an operation timing chart during a vertical wipe operation. FIG. 5 is an operation timing chart during a fade operation. l... Video camera section 2... A/D converter 3... Field memories 4a, 4b = Coefficient multiplier 5... Full adder 6... D/A converter 7... Selector switch 8...Electronic viewfinder 9...Recording section 10--System controller 11...Operation section

Claims (1)

[Claims] First coefficient multiplication means for multiplying a first video signal by a first coefficient; second coefficient multiplication means for multiplying a second video signal by a second coefficient; and the first coefficient. mixing means for mixing and outputting the output of the multiplication means and the output of the second coefficient multiplication means; display means for displaying an image corresponding to the video signal output from the mixing means; and output from the mixing means. a recording means for recording a video signal on a recording medium; and prior to the recording operation of the video signal in the recording means, a first coefficient of the first coefficient multiplication means and a second coefficient of the second coefficient multiplication means. A video signal processing device characterized by comprising: control means for making the values the same.