JPH02119475A - Solid-state image pickup device - Google Patents

Abstract

PURPOSE:To realize many functions by writing output information of a selector circuit into a memory, reading out the information written in the memory again and converting the information into 2-dimension picture information. CONSTITUTION:A selected binary signal is written in a memory 8 via a memory control circuit 7 and the written information is read out again by the memory control circuit 7. Then a luminance with and a color difference signal are generated based on the readout binary signal and the color is designated by an operation section 10. The signal obtained in this way is superimposed on a video signal in a real time by a selector circuit 6 and a titled video signal is obtained. Moreover, as to a change in the color, it is processed similarly as a conventional digital memory function. Thus, memory functions are realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the output signal of a signal generator (hereinafter referred to as a character generator) synchronized with a video signal from a video camera or a vertical synchronization signal and a horizontal synchronization signal of the camera. The present invention relates to a solid-state imaging device equipped with means for writing or reading information into a memory.

Conventional technology In recent years, as the performance of video cameras and their peripheral equipment has improved, the video signal from the camera is binarized by kA/Di conversion, written to memory, and the real-time video signal and the signal from the memory are converted. Many attempts are being made to synthesize images and obtain new images.

For example, a video camera that uses an image sensor and is equipped with an A/D converter and a 266 Kbit static RAM (random access memory), and has a function called a digital memo, has been put into practical use.

The flow of each signal in this conventional digital memo function will be explained using FIG. The video signal obtained from the image sensor 1 is processed in the process processing circuit 2. At this time, a Y signal representing the brightness level is extracted and 1 bit
The A/D converter 3 obtains a binarized signal with a certain level as the overall reference.

This is the title signal Yt, and this title signal is
It passes through the memory control circuit 7 and is written into the memory. In this way, the memory operation is performed.

When reading, the memory control circuit 7
The signal is read out through the selector 6 and superimposed on the real-time video signal.

At this time, a control signal Rt is sent from the operation section 10. ,
Gt engineering. , Btin allows you to specify the color of the title.

The title color control will be explained using FIG. 3. When reading out the title signal Yt stored in the memory and selecting it as a real-time video signal,
It becomes necessary to select not only the luminance signal but also the color difference signal. Therefore, it is necessary to create a color difference signal for the title1.
This converts the Y signal to the color tone control signal Rtin as shown in FIG.

Gt engineering. , Btin. According to FIG. 3, the title signal is magenta at tl and cyan at t2. With this combination, it is possible to change the color tone in a total of eight colors: white, yellow, red, blue, green, and black.

On the other hand, the signal from the character generator is synchronized with the synchronization signal (vertical synchronization signal and horizontal synchronization signal) of the two-dimensional video signal obtained from the image sensor, and is a binary signal of white level and black level. . This binary signal yc is added to the real-time video in the encoder,
Output as a character.

A second explanation of character-signal addition will be given using FIG.

A character is added to the luminance signal Y of the real-time video signal.
Add the signal yCffi. The obtained output Y signal has a very high luminance level when the character signal is "H" as shown in the figure, so it can be regarded as almost white. Also, when the character signal is "L", the real-time video signal is output through.
Two-dimensional image information with an all-white title is obtained.

However, the problem that the invention aims to solve is that it cannot be solved by using the digital memo function.
While you can specify your favorite color for a character generator, if you mix the signal from a character generator using the conventional method, you can only use white.

In order to increase the added value of future video cameras,
The above-mentioned digital memo function and character generator have become indispensable, but as shown in the above-mentioned techniques, the conventional technology cannot change the color of the digital memo function; energy 1
/-tar had the problem that it could only display white.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a novel configuration capable of changing the color of a signal obtained by a character generator.

Means for Solving the Problems In order to solve the above issue 'IJA', the solid-state imaging II1 device of the present invention includes a memory, a memory control circuit for specifying the address of the memory, a vertical synchronization signal and a horizontal synchronization signal of the camera. A constant signal generator, an A/D converter that binarizes the video signal from the solid-state image sensor, and a selector circuit that switches all the output signals of the signal generator and A/D converter in synchronization with the ? It has means for writing the output information of the selector circuit into all the memories, and means for reading out the information written in the memory again and converting it into two-dimensional image information.

Effect With the above configuration, if the signal generating device is synchronized with the synchronizing signal of the camera, the color tone can be changed for the output, and more functions can be realized.

Example An embodiment of the present invention is shown below. I will explain while referring to it.

FIG. 1 is a block diagram of a circuit for writing and reading data into and from a memory in one embodiment of the present invention.

In FIG. 1, 1 is an image sensor, 2 is a process processing circuit, 3 is a 1-bit A/D converter, 4 is a selector circuit for the output of the A/D converter and a character generator output, 6 is a character generator, 6 is a selector circuit for real-time video signals and little signals; 7
is a memory control circuit that specifies the address of the memory space and controls reading and writing to the memory; 8 is the memory; 9 is the encoder; 1o is the operation unit that specifies the color tone of the title to be output; 11 is the synchronization signal for this system. This is a synchronous signal generator that generates

The signal flow will be explained below with reference to FIG.

A two-dimensional video signal obtained from the image sensor 1 is processed in a process processing circuit 2. Here, the signal is divided into a luminance signal and a color difference signal, each processed separately, passed through a selector circuit 6, and then sent to an encoder 9 to obtain an NTSC signal. This becomes a real-time video signal.

Here, the luminance signal in the process processing circuit is taken out and sent to a 1-bit digital/digital converter 3 to obtain a binary signal based on a certain level. This is the title signal Yt
It is. On the other hand, the signal YC from the character generator 5 is synchronized with the synchronization signals (vertical synchronization signal and horizontal synchronization signal) of the two-dimensional video signal obtained from the image sensor 1, and is a binary signal of white level and black level. It has become. The selector circuit 4 performs all selections between these two binary signals. The selected binary signal is thereby written into the memory 8 via the memory control circuit 7. The written information is read out again by the memory control circuit. A luminance signal and a color difference signal are generated based on the binary signals read here, and the color is designated by the operation unit 10. The signal thus obtained is superimposed on the real-time video signal by the selector circuit 6 to obtain a video signal with a title.

Furthermore, the color tone can be changed in the same way as with the conventional digital memo function. The color tone control for this title will be explained with reference to Figure 3. When reading out the title signal Yt i stored in the memory and selecting it as a real-time video signal, it becomes necessary to select not only the luminance signal but also the color difference signal. Therefore, it is necessary to create a color difference signal for the title. As shown in Fig. 3, this is the Yt signal gold tone control signal R11n, Gt
ln.

It can be obtained by gated BtinK process.

In FIG. 3, the title signal is magenta during the t1 period and cyan during the t2 period. This combination produces white and yellow.

It is possible to change the color tone in a total of eight colors: red, blue, green, and black.

As described above, according to the embodiment of the present invention, as long as the signal generating device is synchronized with the camera synchronization signal, the color tone can be changed and many more functions can be realized.

Effects of the Invention As described above, the solid-state imaging device of the present invention has memory,
A memory control circuit that specifies the address of the memory, a signal generator synchronized with the vertical synchronization signal and horizontal synchronization signal of the camera, a MU/D converter that binarizes the video signal from the solid-state image sensor, the signal generator, and a selector circuit for switching each output signal of the D/D converter, and means for writing output information of the selector circuit into a memory;
By having a means to read out the information written in the memory again and convert it into two-dimensional image information, it becomes possible to realize many functions, and its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional configuration, FIG. 3 is a timing diagram, and FIG.
The figure is a timing diagram when adding the carage energy signal. 1...Image sensor, 2...Process processing circuit, 3...1 bit m/D converter, 4...
...Selector circuit, 5...Character
Generator, 6...Selector circuit, 7...
...Memory control circuit, 8...Memory, 9...Encoder, 1o...Operation section, 11...Synchronization signal generator. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A memory, a memory control circuit that specifies an address of the memory, a signal generator synchronized with a vertical synchronization signal and a horizontal synchronization signal of the camera, and an A/D converter that binarizes the video signal from the solid-state image sensor. , a selector circuit for switching each output signal of the signal generator and the A/D converter, means for writing output information of the selector circuit into a memory, and means for reading out the information written in the memory again to generate two-dimensional image information. 1. A solid-state imaging device, comprising: means for converting into a solid-state image sensor.