JPH05252532A - Video signal processor - Google Patents

Abstract

PURPOSE:To quickly and arbitrarily attain a color change or the black and- white of a screen by a single video movie. CONSTITUTION:This device is equipped with a luminance and chrominance signal processing circuit 2 which extracts a luminance signal and a color difference signal from the image pickup input signal of a camera, color difference signal generating circuit 6 which generates the arbitrary color difference signal, selector circuit 5 which switches the color difference signal from the luminance and chrominance signal processing circuit 2 to the arbitrary color difference signal from the color difference signal generating circuit 6, encoder 3 which adds a processing to the luminance signal and the color difference signal from the selector circuit 5, and converts it into a video signal, and control circuit 7 which controls the color difference signal generating circuit 6. Thus, the color change or the black-and-white of the color screen can be arbitrarily attained by the single video movie.

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 a consumer video movie or the like having a built-in camera system equipped with a CCD.

[0002]

2. Description of the Related Art In recent years, video signal processing of consumer video movies, video tape recorders, etc. has been improved in image quality, and programmable control has been made possible by digitization, and the functions have become rich.

A conventional video signal processing device will be described below with reference to the drawings. FIG. 2 is a block diagram showing a camera system as a conventional video signal processing device.
Further, FIG. 3 is a block diagram showing a composite signal as an input which is arbitrarily processed to generate a special output. 2 and 3, reference numeral 1 denotes an image pickup signal input terminal for inputting an image pickup signal output from a solid-state image pickup device such as a CCD. A luminance / color signal processing circuit 2 extracts a luminance signal component and a color difference signal component from the image pickup signal and
It is a circuit that adds correction and aperture correction. An encoder 3 adds a synchronizing signal to the luminance signal and balance-modulates the color difference signal to convert it into a color signal. A video signal processing device 4 is built in a television system, an editing system or the like.

The operation of the conventional video signal processing apparatus configured as described above will be described below.

First, a process of changing a video signal to an achromatic color or an arbitrary color by using the conventional video signal processing device shown in FIG. 2 will be described. Since the camera system shown in FIG. 2 does not have a function of arbitrarily changing only the color difference signal, the image pickup signal input to the video signal input terminal 1 has a luminance and
The Y of the output signal of the encoder 3 passes through the color signal processing circuit 2.
It is output as a signal and a C signal. Therefore, as a special effect, when operating the color components of a color video signal, a video signal processing device 4 as a separate system built in a television set and an editing system as shown in FIG. I was setting and changing the color screen to black and white.

[0006]

However, in the above-mentioned conventional configuration, when a color change or a monochrome display of a color screen is performed as a special effect, it cannot be performed by a camera system such as a video movie alone. Since it has to be performed by using the video signal processing device 4 in another system as shown, there is a problem that the special effect function cannot be realized on a consumer use level.

The present invention is intended to solve the above-mentioned conventional problems, in which a color difference signal is arbitrarily set in the camera system,
It is an object of the present invention to provide a video signal processing device capable of changing colors and making a color screen black and white.

[0008]

In order to solve the above conventional problems, a video signal processing device according to the present invention has the following configuration. That is, a luminance / color signal processing circuit for extracting a luminance signal and a color difference signal from an image pickup input signal of a camera, a color difference signal generation circuit for generating an arbitrary color difference signal, and a color difference signal from the luminance / color signal processing circuit for the color difference signal. A selector circuit that switches to an arbitrary color difference signal from the signal generation circuit, an encoder that processes the luminance signal and the color difference signal from the selector circuit and converts them into a video luminance signal / color signal, and controls the color difference signal generation circuit A control circuit is provided.

[0009]

With the above structure, the video movie photographer can arbitrarily change the color of the color screen or set the color screen to black and white in accordance with the intention of shooting.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of a video signal processing device according to the present invention. In FIG. 1, reference numeral 1 denotes an image pickup signal input terminal, which is a terminal for inputting an image pickup signal output from a solid-state image pickup device such as a CCD. Reference numeral 2 denotes a luminance / color signal processing circuit, which is a circuit that extracts a luminance signal component and a color difference signal component from an image pickup signal and also performs γ correction and aperture correction. An encoder 3 adds a synchronizing signal to the luminance signal, balance-modulates the color difference signal, and converts it into a color signal. Reference numeral 5 is a selector circuit for switching the color difference signal generated in the luminance / color signal processing circuit 2 to an arbitrary signal. Reference numeral 6 denotes a color difference signal generating circuit, which generates an arbitrary color difference signal. A control circuit 7 controls the selector circuit 5 and the color difference signal generation circuit 6.

The operation of the video signal processing device as the camera system configured as described above will be described below.

First, the image pickup signal input to the image pickup signal input terminal 1 is divided into a luminance signal component and a color signal component in the luminance / color signal processing circuit 2 and is subjected to γ correction and aperture correction, and then to the encoder 3. The signals are input, subjected to mixing processing, modulation processing, etc., and output as a video luminance signal / color signal output. This is a normal shooting process.

Next, a case will be described in which the photographer changes the color of the color screen or changes the color screen to black and white according to the intention of special photographing.

First, since only the color component is arbitrarily changed from the normal photographing state, the luminance signal is directly input to the encoder 3 without any processing. On the other hand, the color difference signal is input to the encoder 3 via the selector circuit 5. In this case, the switch is set so that the signal of the color difference signal generation circuit 6 is input to the encoder 3 via the selector circuit 5. The level of the input color difference signal and the selector switching timing are controlled by the control circuit 7 such as a microcomputer.

As described above, according to the present embodiment, the selector circuit 5 is interposed to switch the color difference signal inside the camera system to another arbitrary color difference signal, and this selector circuit is immediately changed according to the intention of the photographer. By switching to, it is possible to change the color of an arbitrary color screen and make it black and white.

[0016]

As described above, according to the present invention, a luminance / color difference signal for extracting a luminance signal and a color difference signal from an image pickup input signal of a camera is used.
A color signal processing circuit, a color difference signal generating circuit for generating an arbitrary color difference signal, a selector circuit for switching the color difference signal from the luminance / color signal processing circuit to an arbitrary color difference signal from the color difference signal generating circuit, and the selector. Shooting a single consumer video movie by having a configuration that has an encoder that processes the luminance signal and color difference signal from the circuit and converts it into a video luminance signal / color signal, and a control circuit that controls the color difference signal generation circuit According to the intention of the person, it is possible to realize an excellent video signal processing device capable of immediately changing a color screen to black and white immediately.

[Brief description of drawings]

FIG. 1 is a block diagram showing a video signal processing device as a camera system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a video signal processing device as a conventional camera system.

FIG. 3 is a block diagram showing a conventional video signal processing device for giving a special effect to a video.

[Explanation of symbols]

 1 Video signal input terminal 2 Luminance / color signal processing circuit 3 Encoder 4 Video signal processing device 5 Selector circuit 6 Color difference signal generation circuit 7 Control circuit

Claims (1)

[Claims] 1. A luminance / color signal processing circuit for extracting a luminance signal and a color difference signal from an image pickup input signal of a camera, a color difference signal generating circuit for generating an arbitrary color difference signal, and a color difference from the luminance / color signal processing circuit. A selector circuit that switches a signal to an arbitrary color difference signal from the color difference signal generation circuit, an encoder that processes the luminance signal and the color difference signal from the selector circuit, and converts them into a video luminance signal / color signal, and the color difference signal generation A video signal processing device comprising a control circuit for controlling the circuit.