JPH08237547A - Video signal processor - Google Patents

Abstract

PURPOSE: To easily monitor respective images by displaying images related to input video signals after displaying video signals related to video signals stored in a memory on a display means for a prescribed period of time corresponding to a writing instruction. CONSTITUTION: When a mixing operation is instructed from an operating part 11, a system controller 10 outputs coefficient data expressing a coefficient 0.5 to a coefficient multiplier 4a and outputs coefficient data expressing a coefficient 0.5 to a coefficient multiplier 4b. The video signal outputted from a video camera part 1 and multiplied by the coefficient 0.5 in the multiplier 4a is added to the video signal read from a field memory 3 and multiplied by the 0.5 in the multiplier 4b in a full adder 5 so that these video signals can be mixed. The mixed video signal is made analog by a D/A converter 6 and supplied through a changeover switch to an EVF 8 and the EVF 8 mixes the video signal outputted from the camera part 1 and the still picture signal stored in the memory 3 so that the image can be displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing device for processing a video signal.

[0002]

2. Description of the Related Art Conventionally, as a method of switching a plurality of types of images on a screen, a device for switching images by a special effect such as wipe or fade is known.

Recently, as a device in which a video camera and a recording device are integrally formed, a device having an editing function such as the above-described image wipe or fade is appearing.

[0004]

However, the above-mentioned device is provided with, for example, a memory circuit, and an arbitrary still image is stored in advance in the memory circuit so that the still image stored in the memory circuit can be dealt with. The special video signal such as wipe or fade can be output by switching the video signal and the video signal corresponding to the subject image formed in the video camera section at different switching timings or by sequentially mixing and mixing at different mixing ratios. The effect is going on.

By the way, while performing the above-mentioned special effect, the electric view finder of the apparatus is
The state of the special effect is displayed in (EVF), but at the start of the special effect, the still image stored in the memory circuit in the apparatus is displayed in the EVF. However, the image corresponding to the video signal formed in the video camera cannot be monitored by the EVF, which is inconvenient.

Therefore, an object of the present invention is to perform video processing using the video signal stored in the memory such as wipe or fade and the input video signal, and the video for each video signal can be monitored. A signal processing device is provided.

[0007]

A video signal processing apparatus according to the present invention comprises a memory for storing a video signal, and a writing instruction means for instructing writing of the video signal into the memory.
A video signal stored in the memory by the display means in accordance with a writing instruction from the writing instruction means, and a recording means capable of recording an input video signal and the video signal stored in the memory. Is displayed for a predetermined period, and then the image related to the input image signal is displayed.

(Operation) According to the above configuration, the contents of each video signal can be confirmed by displaying the video related to the video signal stored in the memory and the video related to the input video signal. Become.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

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

In FIG. 1, reference numeral 1 is a video camera unit for forming and outputting a video signal by picking up an image of a subject, 2 is an analog / digital (A / D) converter for converting an analog video signal into a digital video signal, 3 is a field memory capable of storing a digital video signal for one field, 4a and 4b are coefficient multipliers, 5 is a full adder, 6 is a digital-analog converter for converting a digital video signal into an analog video signal, and 7 is A changeover switch, 8 is an electronic viewfinder (EVF), 9 is a recording unit for recording the input video signal on a recording medium, 10 is a system controller for controlling the operation of each circuit, and 11 is an instruction to the system controller for each operation. It is an operation unit for.

In FIG. 1, first, when the system controller 10 is instructed to start a normal image recording operation by operating the operation unit 11, the system controller 10 is started.
Operates the video camera unit 1, the EVF 8 and the recording unit 9 and also connects the changeover switch 7 to the A side in the drawing so that the video signal corresponding to the subject image output from the video camera unit 1 is output to the EVF 8 and the recording unit 9. Supply to.

The EVF 8 displays a video image corresponding to the subject imaged by the video camera unit 1, and the recording unit 9 outputs a video signal output from the video camera unit 1 to a recording medium (not shown). To record.

In addition, as shown in FIG. 2 (a), the operation section 11 is wiped or faded.
e) When the operation is selected, the system controller 10 causes the video camera unit 1, the A / D converter 2, the D / A converter 6, E
The VF 8 is operated, and the control signal (b) output to the changeover switch 7 is set to the high level (H) (see FIG. 2).
(See (b)), the changeover switch 7 is changed over from the A side in the figure to the B side. At this time, the system controller 10 outputs the coefficient data representing the coefficient "1" to the coefficient multiplier 4a (see FIGS. 2D and 2F), and the coefficient multiplier 4b represents the coefficient representing the coefficient "0". Output the data (Fig. 2 (e),
(See (f)).

By the above-described operation, the video signal output from the video camera unit 1 and digitized by the A / D converter 2 and then multiplied by the coefficient "1" in the coefficient multiplier 4a is The video signal which is multiplied by the coefficient "0" in the multiplier 4b and added in the full adder 5 and then supplied to the D / A converter 6 and analogized in the D / A converter 6 is a changeover switch. Is supplied to the EVF 8 through the video camera unit 1
The image indicated by the output video signal is displayed.

Next, as shown in FIG. 2A, when an image storing operation is instructed in the operation unit 11, the control signal (C) supplied from the system controller 10 to the field memory 3 is changed to that shown in FIG. As shown in c), it changes from high level (H) to low level (L) for one field period,
The field memory 3 is in a storage state while the control signal (C) is at a low level (L), stores the video signal output from the video camera unit 1 and digitized by the A / D converter 2 for one field. Then, after the video signal for one field is stored, when the control signal (C) becomes high level (H), the video signal stored in the field memory 3 is repeatedly read.

At this time, the system controller 10
Outputs coefficient data representing the coefficient "0" to the coefficient multiplier 4a (see FIGS. 2D and 2F).
The coefficient data representing the coefficient "1" is output to b (see FIGS. 2 (e) and 2 (g)), and the video signal read from the field memory 3 and multiplied by the coefficient "1" in the coefficient multiplier 4b. Is added to the signal multiplied by the coefficient “0” in the coefficient multiplier 4a and the full adder 5, and then D /
The video signal supplied to the A converter 6 and converted into an analog signal by the D / A converter 6 is output to the EVF 8 via the changeover switch 7.
The still image indicated by the video signal read from the field memory 3 is displayed on the EVF 8.

As described above, the still image represented 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 then the operation unit 11 outputs the still image. The system controller 10 is instructed to perform the mixing operation.

When the system controller 10 is instructed by the operation unit 11 to perform a mixing operation, the coefficient data representing the coefficient "0.5" is output to the coefficient multiplier 4a (see FIG. 2).
(See (d) and (f)), and the coefficient "0.
The coefficient data representing 5 "is output (Figs. 2 (e) and 2 (g)).
Image signal output from the video camera unit 1, digitized by the A / D converter 2, and further multiplied by the coefficient “0.5” by the coefficient multiplier 4a, and read from the field memory 3. Further, the video signal multiplied by the coefficient “0.5” in the coefficient multiplier 4b is added in the full adder 5 to be mixed.

The mixed video signal is 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.
The EVF 8 displays the image represented by the mixed video signal in which the video signal output from the video camera unit 1 and the still image signal stored in the field memory 3 are mixed.

By the above-mentioned operation, the operator can confirm that the wipe or fade operation is selected, and at the same time, the EVF can monitor the captured image at the time of wipe or fade recording. Then, when the captured image to be wiped or fade-recorded is determined by the above-described operation, the operator operates the operation unit 11,
As shown in (a), the system controller 10 is instructed to start wipe recording or fade recording.

When the operation unit 11 is instructed to start wipe or fade recording, the system controller 10 operates the recording unit 9 and causes the coefficient multiplier 4 to operate.
The switching timing of the combination of coefficient data supplied to a and 4b is set to 1 depending on the type of wipe or fade operation.
By changing the field cycle (Fig. 2 (d) ~
(See (g)), the D / A converter 6 is supplied with a digital image pickup video signal that has been wiped or faded by a still image signal, and after being converted into an analog signal here, the EVF 8 via the changeover switch 7 Is supplied to the recording unit 9,
The wiped or faded image is displayed on the EVF 8 and recorded on the recording medium in the recording unit 9.

Further, the above-mentioned wipe or fade processing operation will be described in detail with reference to FIGS. 3, 4 and 5.

FIG. 3 shows an operation timing chart in the case of performing a wiping operation in the horizontal direction. (A) is a horizontal synchronizing signal, (b) is a coefficient supplied from the system controller 10 to the coefficient multipliers 4a, 4b. A combination of data,
(C) shows a horizontal wipe image displayed on the screen of the EVF 8.

Now, the coefficient of the coefficient data supplied from the system controller 10 to the coefficient multiplier 4a is X, the coefficient of the coefficient data supplied to the coefficient multiplier 4b is Y, and the combination of the coefficient data is (X, Y). In the case of horizontal wipe recording, the combination of coefficient data output from the system controller 10 is synchronized with the horizontal synchronizing signal shown in FIG. 3A, and as shown in FIG. The combination of coefficient data assigned to the horizontal scanning period is made equal, and the horizontal wipe image shown in FIG. 3C is displayed on the EVF 8 by changing from (1,0) to (0,1) in the field cycle. It will be recorded on the recording medium.

FIG. 4 shows an operation timing chart when the wipe operation is performed in the vertical direction.
(A) is a vertical synchronizing signal, (b) is a combination of coefficient data supplied from the system controller 10 to the coefficient multipliers 4a, 4b, and (c) is a vertical wipe image displayed on the screen of the EVF 8. is there.

As described above, the system controller 10
When the combination of coefficient data output by the above is represented as (X, Y), the combination of coefficient data output by the system controller 10 in the case of vertical wipe recording is shown in FIG.
As shown in FIG. 4B, the ratio of coefficient data combinations (1, 0) and (0, 1) which are synchronized with the vertical synchronizing signal shown in FIG. The vertical wipe image shown in FIG. 4 (c) is displayed on the EVF 8 and recorded on the recording medium by changing it.

FIG. 5 shows an operation timing chart in the case of performing the fade operation. (A) is a vertical synchronizing signal, (b) is coefficient data supplied from the system controller 10 to the coefficient multiplier 4a, (C) shows the 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 synchronizing signal shown in FIG. 5A, and as shown in FIG. The value of the coefficient data assigned to each horizontal scanning period is made equal, the value is changed from "0" to "1.0" in the field cycle, and the coefficient data supplied from the system controller 10 to the coefficient multiplier 4b is changed to "1". By changing from .0 "to" 0 ", the fade image is displayed on the EVF 8 and recorded on the recording medium.

As described above, in the video signal processing apparatus according to the present embodiment, when the wipe or fade recording of the video signal is performed using the memory, the subject image captured by the video camera unit and the memory The image shown by the image signal stored in can be confirmed, and it is extremely easy to use.

[0031]

As described above, according to the present invention, when performing processing using the video signal stored in the memory such as wipe or fade and the input video signal, each image can be easily monitored. You can do it.

[Brief description 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 device shown in FIG.

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.

[Explanation of symbols]

 1 Video Camera Section 2 A / D Converter 3 Field Memory 4a, 4b Coefficient Multiplier 5 Full Adder 6 D / A Converter 7 Changeover Switch 8 Electronic Viewfinder 9 Recording Section 10 System Controller 11 Operation Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadayoshi Nakayama 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc., Tamagawa Plant Company Tamagawa Office

Claims (1)

[Claims] 1. A memory for storing a video signal, a writing instruction means for instructing writing of the video signal to the memory, a recording means capable of recording an input video signal and a video signal stored in the memory, and a display. Means for displaying a video image related to the input video signal after a video image related to the video signal stored in the memory is displayed for a predetermined period by the display means in response to a writing instruction from the write instructing means. Characteristic video signal processing device.