JPH02260982A - Character/pattern storing reproducing device - Google Patents

Abstract

PURPOSE:To improve the contrast of the luminance levels between a character/ pattern signal and a color signal by providing a superimposed luminance level converting circuit in front of a character superimposing circuit, and changing and superimposing the luminance level of the character/pattern signal according to the luminance level of the color signal to be a background. CONSTITUTION:When a title is stored into a memory 6 and a color back mode is commanded by a command signal 12, the color signal in one color is generated by a color back signal generating circuit 16, and inputted to a video signal input terminal 1. At such a time, since the command signal 12, which designates the color of the color signal, is simultaneously inputted to a superimposed luminance level converting circuit 15 as well, the color of the color signal, namely the luminance level, can be judged. That is, when a white or a yellow to be at comparatively high luminance level as shown in a figure is selected as the color background, a black to be at the low luminance level is selected as the superimposing signal. In addition when the other colors to be at the comparatively low luminance level is selected as the color background, the white to be at the high luminance level is selected as the superimposing signal.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a character/pattern storage device that can store image patterns such as title characters or figures, and output them over other images. be.

[Conventional technology]

In recent years, with the spread of home VTRs, the demand for home video cameras has increased, and there has been an increasing demand for home video cameras to have multiple functions, editing functions, and the like.

Among these functions, the impose and telopper functions for inserting titles and the like are among the functions that are particularly requested.

A conventional telop device for inserting titles and the like will be described below with reference to FIGS. 3 to 5. Figure 3 shows
1 is a block diagram showing an example of a conventional character/pattern storage/reproduction device; FIG. In Figure 3, (1) is a video signal input terminal, (2) is a detection circuit that extracts character/pattern information, (3J is a synchronization separation circuit that separates a synchronization signal from the video signal input, and (4) is a serial Parallel conversion circuit, (
5] is a parallel-to-serial converter circuit, (6) is a memory, (
7) is a reference clock oscillation circuit, (83 (9) is a vertical counter and a horizontal counter that respectively command the address of memory (6), @ is a command signal from a user such as a switch, etc., and acid is a signal that transmits character/pattern information to other A4 is a video output terminal, aQ is a color pack signal generation circuit that generates a color signal in response to a command from command signal 4, and the head is a video signal input terminal for superimposing a background signal ( 1) Color pack generation port IG8
Switching circuit for switching between No. 04 and No. 43, Ql
) inputs the command signal 4 and the synchronization signal from the synchronization separation circuit (3), and inputs the vertical counter (8), horizontal counter (9),
This is a controller that controls the timing of counting and resetting, and the reading and writing of the memory (6), and together these constitute a character/pattern storage/reproduction device.

Figure 4 shows an example when a conventional character/pattern storage/reproduction device is used in a video camera, where (7) is the subject, the α field is the title image to be inserted, (4) is the lens, and (Incorporated) is the image sensor. Element, Iwa is a signal processing circuit, and (to) is a monitor television.

FIG. 5 shows an example of an image of a monitor television when a title picture is recorded and superimposed on an image of a subject, and an example of an image of a monitor television when it is superimposed with a color pack signal.

In Fig. 4, a title image 4 to be inserted is photographed in advance, passed through a lens (4), a video signal is extracted by an image sensor t2), a video signal is synthesized from the video signal in a signal processing circuit, and characters and Input to pattern storage/reproduction device.

The input video signal is generated by the synchronization separation circuit (3), and at the same time, is binarized by the detection circuit (2) to become a digital signal.This digital signal is
The serial-to-parallel conversion circuit (4) converts the signal into an 8-bit digital signal and stores it in the memory (6). In order to achieve this kind of operation, a reference clock is created in the oscillation circuit (7) of this circuit, and this reference clock is supplied to the serial-to-parallel conversion circuit (4) and the parallel-to-serial conversion circuit (5) to provide conversion timing. .

This clock is also supplied to a horizontal counter (9), which is a counter for addressing the lower bits of the memory (6), to address the memory (6). controller c
The sword uses command signals Qζ for switches, etc., and memory (6
), serial-to-parallel conversion circuit (4), parallel-to-serial conversion circuit (5), horizontal counter (9), vertical counter (8), frequency divider circuit QQ, and oscillation circuit (7) to the operating or non-operating state (rubbing). The controller aυ also resets the horizontal counter (9) at the start point of one horizontal scan and the vertical counter (8) at the start point of one vertical scan.

When the title image 01 has been memorized, the subject (property) is photographed and the video signal is sent to the character/pattern storage/reproduction device αη.
Enter.

When the video signal of the subject is input, the synchronization separation circuit (3
) Controller East resets the horizontal counter (9) at the start point of 1 horizontal scan and the vertical counter (8) at the start point of 1 vertical scan, and resets the pattern, characters, etc. on the screen. The correlation between the position of
The 8-bit digital signal, which is information such as characters and patterns stored in the memory (6), is turned into a serial digital signal by the parallel-to-serial conversion circuit (5), and is superimposed on the original video signal by the character superimposition circuit μs. is output to the video output terminal Q4, and is output to the 5th video output terminal on monitor TV 4.
You can see an image like the one shown in (a) of the figure.

In addition, in order to enhance the effect of the title picture, it is possible to make the superimposed background video signal a single color signal, like a TV news broadcast, rather than a video signal shot with a video camera. .

For example, considering the signal generated by the color pack signal generation circuit aQ, in Monitor TV 4, we have discussed the conventional character/pattern storage/reproduction device in Section 5 and above. When characters/patterns are superimposed against a background color signal, there is a problem in that there is little change in the brightness level of the characters/patterns and the brightness level of the background color signal (this is difficult to distinguish).

An object of the present invention is to use home video cameras to add characters and characters to color packs, such as those used in movies and television broadcasts.
A superimposition brightness level conversion circuit is installed in front of the character/pattern storage/reproduction character superimposition circuit to make the superimposition of pattern information more effective. Superimpose by changing the brightness level.

[Effect]

No matter how the background color signal is selected, it is possible to provide a contrast in the luminance level between the text/pattern signal and the color signal, so text/pattern information can be superimposed more effectively.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described, which has a built-in color pack signal generation circuit that can generate eight colors of white, yellow, light blue, green, magenta, red, blue, and black as color pack signals, and has a white color pack signal as a superimposed signal. A case in which two colors, , and black, can be selected will be explained using drawings.

FIG. 1 is a block diagram showing an embodiment of a character/pattern storage/reproduction device according to the present invention. Figure 1 (here,
(1) is a video signal input terminal, (2) is a detection circuit that extracts character/pattern information, (3) is a synchronization separation circuit that separates a synchronization signal from the video signal input, (4) is a serial-parallel conversion circuit, ( 5) is a parallel-serial conversion circuit,
(6) is memory, (7) is reference clock oscillation circuit, (
8) (9) is a vertical counter and a horizontal counter that command the address of the memo 1/6), 4 is a user command signal such as a switch, and a bribe is a character for superimposing character/pattern information with other video signals. A superimposition circuit, α4 is a video output terminal, (to) is a superimposition brightness level conversion circuit that changes the brightness level of the character/pattern signal superimposed by the character superimposition circuit a, M is a color converter in response to the command from the command signal (2) A color pack signal generation circuit that generates a signal, 00 is a switching circuit that switches the background signal to be a signal from the video signal input terminal (1) or a signal from the color pack generation circuit OQ, and Ql) is a command signal. mouth and synchronization separation circuit (3)
It is a controller that inputs a synchronization signal from and controls the vertical counter (8), horizontal counter (9), count and reset timing, and reading and writing of the memory (6).
All of these constitute the character/pattern memory/reproduction bag fla power.

FIG. 2 shows an example of the video signal output to the monitor television at this time.

The operation of photographing a title image to be inserted in advance and the operation of using a video camera photographing signal as a background signal are the same as those of conventional character/pattern storage and playback devices, and a single color pack is used as a background signal. The operation when a signal is selected is different from the conventional one.

As in the past, after storing the title in the memory (61) as shown in Fig. 4, when the color pack mode is commanded by the command signal □□□, the color pack signal generating circuit αQ generates a color signal of one color. Video signal input terminal (1)
Enter.

At this time, the command signal port for specifying the color of the color signal is also input to the superimposed brightness level conversion circuit (4) at the same time, so the color of the color signal, that is, the brightness level, can be determined. When white or yellow with a high brightness level is selected as a color pack, black with a low brightness level is used as a superimposed signal, and when other colors with a relatively low brightness level are selected as a color pack, white with a high brightness level is used as a superimposed signal. shall be.

The above example has a built-in color pack signal generation circuit that can generate 8 colors of white, yellow, light blue, green, magenta, red, blue, and black as color pack signals, and 2 colors of white and black can be selected as superimposed signals. Although this has been described, other color signal combinations can be considered in the same way.

〔Effect of the invention〕

As described above, according to the present invention, a superimposition brightness level conversion circuit is provided in front of the character superimposition circuit, and the brightness level of the character/pattern signal is changed and superimposed according to the brightness level of the background color signal. This makes it possible to more effectively superimpose text/pattern information onto color packs, as is done in television broadcasts.

[Brief explanation of drawings]

1 and 2 are diagrams showing one embodiment of the present invention, FIG. 1 is a block diagram showing the configuration, and FIG. 2 is a character/pattern notation of the present invention that monitors the video output of the playback device. FIG. 3 is a diagram illustrating an example when viewed on television. Figures 3 to 5 are diagrams showing one example of the conventional technology. Figure 3 is a block diagram, Figure 4 is a diagram when applied to a video camera, and Figure 5 is an example when viewed on a monitor TV. FIG. (2): Detection circuit, (4) Nijiri-parallel exchange circuit, (5): Parallel-serial conversion circuit, tar: Memory, 42 controller, σ3-character superimposition circuit, Q = superimposition brightness level conversion circuit, Ofj: Color pack signal generation circuit. In addition, the same symbols in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) It has a detection circuit that binarizes character/pattern information superimposed on a video signal, a serial-parallel conversion circuit that converts this binarized signal into a parallel digital signal, and a memory that stores this parallel digital signal. , a parallel-to-serial conversion circuit that stores character/pattern information superimposed on a video signal from a television camera, etc., converts the data read from this memory into a serial digital signal, and adds this serial digital signal to other video signals. In a device that outputs a video signal by superimposing the video signal, when the video signal is made into a color pack (one color signal), the brightness level of the added and superimposed characters/patterns is changed depending on the brightness level of the color signal and output. A character/pattern storage and playback device that can.