JPH0358590A - Solid-state video camera equipment - Google Patents

Abstract

PURPOSE:To execute chromakey processing without using a time base corrector by synchronously driving two image pickup means. CONSTITUTION:A driving signal generator 5 receives a vertical synchronizing signal and a horizontal synchronizing signal to be outputted from a synchroniz ing signal generator 6 and generates signals to drive image pickup parts 1 and 3. An R-Y color difference signal and a B-Y color difference signal are compared with a reference voltage by comparators 8 and 9, outputted, inputted to an AND element 10 and outputted as a chromakey signal according to an AND. A luminance signal to be outputted from signal processing circuits 2 and 4, the R-Y color difference signal and B-Y color difference signal are sent to selecting circuits 12-14 and switched by the chromakey signal, and a synthe sized luminance signal and a synthesized color difference signal are outputted and sent to an encoder 15. Thus, without using the time base corrector, picture synthesization depending on the chromakey processing can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a solid-state video camera device using a solid-state camera and security device.

BACKGROUND OF THE INVENTION Conventionally, in order to perform chromakey processing using two solid-state video camera devices, a chromakey mixer with a built-in time-pace corrector is required.

An example of a solid-state video camera device that performs chromakey processing will be described below with reference to the illustrations. Figure 2 shows
This shows the configuration of a conventional example.

In FIG. 2, 16.17 is a known solid-state video camera device. 18 is a mixture a3 for chromakey processing.

The internal configuration includes a time pace collector 19 which synchronizes asynchronous video signals output from solid-state video camera devices 16 and 17 and outputs a synchronized video signal. 20
．． 21 is a signal processing circuit that separates the visual signal into a luminance signal and a color signal.

A chromakey signal generator 22 compares the color signals output from the signal processing circuit 2o and outputs a chromakey signal. 23, 24. 25 is a selection circuit, which is a signal processing circuit 2;
The luminance signal and color signal output from 0.21 are switched by the chromakey signal. 26 is an encoder that converts the luminance signal and color signal output from the selection circuits 23, 24, and 25 into video signals.

Problems to be Solved by the Invention However, the mixer for chroma key processing has had the problems of being large in size due to the built-in time base collector, lack of mobility, and being expensive.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a solid-state video camera device with built-in chromakey processing that is small, has good mobility, and is inexpensive.

Means for Solving the Problems In order to solve the above-mentioned problems, the solid-state video camera device of the present invention includes two imaging means, a drive signal generating means for driving both of the imaging means, and an output signal from both of the imaging means. two signal processing means for converting a video signal to a luminance signal and a chroma signal, a means for generating a chroma key signal from the chroma signal, and a selection means for switching the luminance signal and chroma signal output of the signal processing means by the chroma key signal. It has a configuration.

Effects In the present invention, with the above-described structure, the two imaging means are driven in synchronization, so that chromakey processing can be performed without using a time base corrector.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a solid-state video camera device according to an embodiment of the present invention. In Figure 1, 1.3
is an imaging unit, 2 and 4 are signal processing circuits, 6 is a drive signal generation circuit, 6 is a synchronization signal generation circuit, 7 is a chromakey signal generation circuit, the internal configuration is 8.9 is a comparator, 1
0 is an AND element. 11 is chromakey processing ON/O
FF switch, 12, 13.14 is selection circuit, 15
is an engineer/coder.

The operation of the solid-state imaging device configured as described above will be explained.

First, the drive signal generator 5 receives the vertical synchronization signal and the horizontal synchronization signal output from the synchronization signal generator 6, and
Generates a signal to drive. Imaging unit 1. The video signal output from 3 is input to the signal processing circuit 2.4. A signal processing circuit 2.4 performs known signal processing, converts the signal into a luminance signal and a color difference signal, and outputs the signal. The R-Y color difference signal and the B-Y color difference signal output from the signal processing circuit 2 are compared with a reference voltage by comparators 8 and 9 and output. The comparator output signal is input to the ND element 1o and output as a chromakey signal by ANDing. The luminance signal, R-Y color difference signal, and B-Y color difference signal output from both signal processing circuits 2 and 4 are sent to selection circuits 12, 13.14, and are switched by the chromakey signal to form a composite luminance signal. A combined color difference signal is output and sent to an encoder 16, where it is converted into, for example, an NTSC video signal. The chromakey processing ON/OFF switch selects chromakey processing ON/OFF.

Effects of the Invention As described above, the present invention provides two imaging means, a drive signal generation means for driving the imaging means, and two signal processing methods for converting the video signal output from the imaging means into a luminance signal and a color signal. By providing a means for generating a chroma key signal from a color signal, and a selection means for switching between the luminance signal and color signal output of the signal processing means using the chroma key signal, both imaging units are driven in synchronization, thereby creating a time pace corrector. Video composition using chromakey processing can be performed without using chromakey processing.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a solid-state video camera device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a solid-state video camera device that performs a conventional chromakey process. 7...Chromakey signal generator, 8.9...
...Comparator, 10...▲) fD element,
11... Switch, 18... Mixer for chromakey processing.

Claims (1)

[Claims] Two imaging means, a drive signal generation means for driving both of the imaging means, two signal processing means for converting the video signals output from the two imaging means into a luminance signal and a color signal, and a chroma key signal from the color signal. A solid-state video camera device comprising means for generating a chroma key signal, and selection means for switching between a luminance signal and a color signal output of the signal processing means using a chromakey signal.