JPH02260981A - Character/pattern storing/reproducing device - Google Patents

Abstract

PURPOSE:To produce an effect like an animation by composing a memory map so that the high-order bit of a memory address for plural pictures may designate the pages of the pictures, and automatically switching a character pattern screen at a constant cycle. CONSTITUTION:When an animation mode command 16, which automatically switches the screen, is inputted, a most significant bit switching circuit 15 automatically switches and reads the most significant bit of the address of a memory 6 at every constant interval of time. When illustrations are stored on the first and second pages of the memory 6, the respective illustrations are alternately superimposed on the signal from a video signal input terminal 1 and outputted. Based on said method, a stored arbitrary character and graphic are read, superimposed on the normal video signal, projected, and when they are utilized for video camera photographing and video editing, the effect can be produced as if they are moving.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a character/pattern storage device that can store title characters or double edge patterns such as figures, etc., and output them overlapping other images. It is.

<Prior Art> 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 be multi-functional and have a higher excavation capability.

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

Below, the caption device that inserts conventional titles, etc.
This will be explained using FIG. In Figure 3, (
1) is a video signal input terminal, (2) is a detection circuit that extracts character/pattern information, (3) is a sync separation circuit that separates a sync signal from the video signal input, (4) is a serial-to-parallel conversion circuit, (5) ) is a parallel-to-serial conversion circuit, (
6) is a memory, (7) is a reference clock oscillation circuit, (8) is a reference clock oscillation circuit, and (8) is a reference clock oscillation circuit.
) (9) is the vertical counter and horizontal counter that command the address of the first n memory (6), αQ is the synchronization separation circuit (
3) and a branch circuit that controls the up/down timing of the vertical counter (8) and horizontal counter (9) from the transmitting circuit (3), (b) is the controller, @ is the command signal from the user such as a switch, (to) is a character superimposition circuit for superimposing character/pattern information with other video signals, and α◆ is a video signal output terminal.

First, the main flow of character/pattern signals will be explained. The video signal input through the video signal input terminal (1) is
A synchronization signal is created by the synchronization separation circuit (3), and is binarized into a digital signal by the detection circuit (2). This digital signal is processed by a serial-parallel conversion circuit (4
), it becomes a digital signal such as 8 bits and becomes a memory (6).
is memorized. In addition, 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 converter circuit (5), and is superimposed on the original video signal by the character superimposition circuit (2). It is output to the video output terminal α◆ in the form shown below.

In order to realize the above operation, the oscillation circuit (
In step 7), a reference clock is created, 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. Further, this clock is frequency-divided by a frequency divider circuit αO and then supplied to a horizontal counter (9) which is a counter for specifying the address of the lower bits of the memory (6), thereby specifying the address of the memory (6). The carry signal of the horizontal counter (9) is supplied to the vertical counter (8), which is a counter for addressing the first bit of the memory (6), to address the memory (6). Further, the controller (2) is designated by a command signal (2) from a switch or the like to write or read characters/patterns.

As a result, the controller (b) includes a memory (6), serial JL//f parallel conversion 1m flat (4), parallel to serial conversion circuit (5), horizontal counter (9),
The vertical counter (8), branch circuit Q1, and oscillation circuit (7) are activated or deactivated.

The controller (b) resets the horizontal counter (9) and vertical counter (8) at the start point of one field based on the synchronization signal supplied by the synchronization separation circuit (3), and resets the pattern and characters on the screen. Correlation is established between the positions of the locations and the addresses of the memory (6).

The above describes the conventional character/pattern memory/reproduction device. could not be switched.

An object of the present invention is to provide a character/pattern storage/playback device that can automatically switch the character/pattern screen at regular intervals to produce an animation-like effect in a home video camera or the like. The memory map is configured so that the upper bits of the memory address specify the screen page, and an upper bit switching circuit is provided.

<Operation> By switching the upper bits at regular intervals, pages, that is, character/pattern screens can be switched.

<Embodiments of the Invention> Hereinafter, embodiments of the present invention when the number of screens is two will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a character/pattern storage and reproduction device according to the present invention. In Figure 1, (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 video signal input, (4) is a serial-to-parallel conversion circuit, (5) is a parallel-to-serial conversion circuit, ( 6) is the memory, (7) is the reference clock oscillation circuit, and (8) and (9) are the memories (6), respectively.
) vertical counter, horizontal counter,
A is a command signal from the user such as a switch, and (to) is a letter/
A character superimposition circuit for combining pattern information with other video signals, a4 is a video output terminal, (b) is a command signal (6
) and the sync signal from the sync separation circuit (3), and controls the count and reset timing of the vertical counter (8) and horizontal counter (9), as well as the reading and writing of the memory (6); (g) is the screen; The most significant bit switching circuit is the page command, and Q time is the video mode command signal.

Figure 2 shows an example of a memory map of the character/pattern storage/reproduction device of the present invention, which is configured to store and reproduce two screens of 512 bits horizontally and 256 bits vertically using a memory generally called 256 bits. are doing. The IV (vertical scan) of the NTSC system signal is 262.5H (horizontal scan), but the effective period in which the video signal is actually contained is approximately 24
Since it is 0H, 256 vertical bits is sufficient.

If we call the state in which the screen is automatically switched the movie mode, when the screen is not in the movie mode, that is, when the movie mode command signal a.
Performs storage/reproduction operation of pattern information. At this time, a page command for the screen from the command signal is given to the most significant bit switching circuit (2) to switch the most significant address of the memory (6), and character/pattern information is stored and reproduced in each page.

When the video mode command 4 o'clock is input, the most significant bit switching circuit (g) automatically switches and reads the most significant bit of the address of the memory (6) at regular intervals.

If illustrations like those shown in Figure 2 are stored in the first and second pages of the memory (6), each illustration will be alternately superimposed on the signal from the video signal input terminal (1). can be output.

Although the case where the number of screens is two has been described above, the same can be considered even if the number of screens increases to four or eight screens. This can be achieved by sequentially switching not only the most significant bit of the address, but also the two and three most significant bits.

<Effects of the Invention> As described above, according to the present invention, any stored characters/figures (titles, comments, illustrations, etc.) are read out and displayed overlaid on a normal video signal, allowing video camera shooting and video recording. When using it for editing, please enter the title, comments,
Switch information such as illustrations like animation,
You can create an effect that makes it appear as if they are moving.

[Brief explanation of drawings]

1 and 2 are diagrams showing one embodiment of the present invention, with FIG. 1 being a block diagram showing the configuration, and FIG. 2 being a diagram showing a memory map. FIG. 3 is a block diagram showing a conventional embodiment. 2: Detection circuit 4 Digital parallel conversion circuit 5
:Parallel-serial conversion circuit 6:Memory 11:
Controller 13: Character superimposition circuit 16: Most significant bit switching circuit 16: Video mode command signal Note that in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A detection circuit that binarizes character/pattern information superimposed on a video signal, and converts this binarized signal into parallel
It has a serial-parallel converter circuit that converts it into a digital signal, and a memory that stores this parallel digital signal. It stores character/pattern information for multiple screens superimposed on the video signal of a television camera, etc., and the data read out from this memory. In a parallel-to-serial converter circuit that converts to a serial digital signal, and in a device that adds and superimposes this serial digital signal to another video signal to obtain a video signal output, a character that can switch and reproduce multiple screens at regular intervals. -Pattern storage and playback device.