JPH02268576A - Character insertion device - Google Patents

Abstract

PURPOSE:To clearly express a display position and to clarify the display of a background image and character information by designating the picture insertion position of the character information by cursor information whose display period is shortened than a blinking period. CONSTITUTION:A character display control circuit 1 reads out the character information from a character generation ROM 4 by a key operation, and can be inserted to a position indexed by the cursor information. Also, the display period to display a cursor based on the count value of a counter 1e and the blinking period not displaying the cursor are decided. At this time, the blinking period of the cursor information for character information position designation is set shorter than the display period, and when the character information is overlapped on the cursor information, a period where the character information is displayed at an inverted state is set shorter than the period where it is displayed at a normal rotating state. In such a way, it is possible to easily visualize the background image and the character information and to prevent the visuality of the display position of the cursor from being lowered.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention provides a method for inserting characters such as titles or subtitles into recorded information recorded on a recording medium of a magnetic recording/reproducing device using a cursor. Relating to an insertion device.

(Prior art) In a magnetic recording and reproducing bag @ (hereinafter referred to as a VTR), recorded information is monitored on a CRT display device, or character information such as titles and subtitles are displayed as a blue electronic image during imaging. It has a character insertion function that can be inserted into recording information. As a method for inserting such character information, there is a method using a cursor. That is, a cursor is displayed on the screen, and the position where character information is to be inserted is specified by the display position of the cursor. The inserted title and caption will be superimposed on the background image.

This type of character insertion device blinks the cursor at regular intervals in order to make the cursor display position easily visible.

However, in this method, the background image is masked by the cursor at regular intervals, making it difficult to see. Also,
When the cursor is moved to the character insertion position and the character is displayed on the screen, the character and cursor form on the screen, making it difficult to determine what the character is. Some of the character information is the same as the cursor, and in such cases, the character information cannot be determined at all.

Further, when the character display is black and white, there is a problem that it is impossible to distinguish between the case where the character display section is "filled in" and the case where it is "transparent."

(Problems to be Solved by the Invention) Conventional character insertion devices display the cursor in a blinking manner to indicate the cursor position, which has the disadvantage that the background image is masked by the cursor and is difficult to see.

Furthermore, the inserted character information is displayed in a normal rotation state during the cursor display period, and is displayed in reverse during the blink period, making it difficult to visually recognize the character content. especially,
When the character display is black and white, it is difficult to distinguish between "transparent" and "fill in".

It is an object of the present invention to provide a character insertion device that eliminates the above-mentioned problems and allows easy visual recognition of character information and background images.

[Structure of the Invention] (Means for Solving the Problems) This invention makes the blink period of cursor information for character information position specification shorter than the display period, and when the character information and cursor information are on-screen type, the character information The period in which it is displayed in the reversed state is shorter than the period in which it is displayed in the normal state.

(Function) With such a configuration, the blink period in which cursor information is not displayed becomes longer, and the background image and character information become easier to visually recognize. Furthermore, even if the blink period becomes longer, the visibility of the cursor display position does not deteriorate.

(Example) Hereinafter, the present invention will be explained in detail with reference to illustrated examples.

FIG. 1 is a block diagram showing an embodiment of a character insertion device according to the present invention.

In FIG. 1, reference numeral 1 denotes a character display output circuit that generates an insertion image signal to be inserted into a background image recorded on a videotape. The character display output circuit 1 has a character input key 1a, a cursor display key 1b, a cursor display position key 1C, and a character registration key 1d, and when these keys are operated, character information is read from the character generation ROM 4, and an index of the cursor information is read out. Character information can be inserted at the desired position.

2 is a character display output circuit that inserts the signal from the character display output circuit 1 into the background image signal. This circuit 2 selectively outputs the background image signal and the inserted image signal q by using, for example, a superimposition method.

3 is a CRT display for displaying a display image signal from a character display output circuit.

Further, the character display output circuit 1 has a cursor blink period 1C, and is configured to determine a display period in which the cursor is displayed and a blink period in which the cursor is not displayed, based on the counter value of the counter 1e.

According to the character insertion device configured as described above, the character display output circuit 1 generates cursor information such that the cursor blink period is longer than the cursor display period based on the count value of the counter 1e. This lengthens the display period of the background image, making it easier to visually recognize the background image than before.

Furthermore, when the cursor is moved to a desired character insertion position and the character is displayed at that position (adjustment 8), the display positions of the cursor and character on the screen overlap.

In this state, the cursor repeats the display period and blink period as described above, but the character information at this time is
During the cursor display period, it is masked by the cursor and becomes inverted, and during the cursor blink period,
The character is displayed in normal rotation. In this case as well, the blink period is longer than the display period of the cursor, so the normal display period of the character information is longer than the reverse display period, and even if the duty cycle is the same, Characters can be more easily recognized than conventional character insertion devices.

A flowchart of such display control is shown in FIG.

In FIG. 2, when the VTR is operating, for example, in the editing mode, it is repeatedly determined in step S1 whether or not it is in the title insertion mode. This is, for example, cursor display key 1
This is to determine whether or not b was pressed.

When the cursor display key 1b is pressed, in step S1,
Determining that it is the title insertion mode ("YES"), the character display output circuit 1 makes the determination in step S2.

Step S2 is a process of determining whether it is a cursor information display period or a printer period. This determination is made by determining "YES" or "NO" by determining the count value of the counter 1e, since the counter 1e starts counting when the cursor display key 1b is pressed.

When "YES" in step S2, the cursor is displayed on the screen, and the process moves to step S3.

In step S3, when the value of the counter 1e indicates the end of the cursor display period ("YES"), step S5 is executed to erase the cursor. If 'NO' in step S2,
This is the cursor blinking period, and the process moves to step S4.

In step S4, when the value of the counter 1e indicates the end of the blinking period (°"YES"), step S6 is executed and a cursor is displayed.

FIG. 3 shows an example of a screen produced by the display output circuit 1. As shown in FIG. In FIG. 3, a indicates the cursor display period,
b indicates the cursor blink period.

In the cursor display operation and blink operation of a, the cursor display period is shorter than the blink period, as shown in the timing chart of FIG. 3C.

As a result, the background image mask period is shorter than before, and the background image! i! The knowledge becomes better than before.

To write a character at the cursor designated position, press the cursor display position key 1C to move the cursor to the character insertion position. Next, press the character input key 1a to read out the desired character and enter the character generation ROM.
Access 4. Thereby, a desired character can be read from the character ROM 4 and displayed at the same position as the cursor.

FIG. 4 shows an example of the screen when writing the above characters. In FIG. 4, a indicates a cursor blinking period, and b indicates a cursor display period.

In this case, the character information is ``1J.'' In the case of a, the character information is displayed in normal rotation, and the character display area is displayed in white, for example. In the case of b, the cursor area is displayed in white, and the character display area is displayed in white. displays a background image.As shown in FIG. 4C, the normal rotation display period and the reverse display period are longer than the reverse display period.

This increases the clarity of the character information, allowing it to be recognized better than before.

As shown in FIG. 5, when the cursor is moved from the character insertion position, the character is displayed in the normal rotation display state as shown in FIG. 4a.

In this way, by varying the duty of the cursor blink cycle so that the blink period becomes longer, the background image and character visibility are improved better than before. Furthermore, with this display control method, even if the character display is black and white, it is possible to distinguish between 'transparent' and 'filled in'.

[Effects of the Invention] As explained above, according to the present invention, the display position is clearly expressed by blinking the cursor, and the display of the back weight image and character information is made clear by changing the blink cycle tutee. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a character insertion device according to the present invention, FIG. 2 is a flowchart showing a cursor display operation according to the invention, FIG. 3 is an explanatory diagram showing the cursor display on a screen, and FIG. 4 and 5 are explanatory diagrams showing the screen display operation of the character. 1...Character display output circuit, 2...Character display output circuit, 3...CRT display, 4...
Character generation ROM, 1a...Character input key
1b...Cursor display key 1C...Cursor display position key 1d...Character registration key 1e...
·counter. Figure 3

Claims (1)

[Scope of Claims] A screen insertion position of character information read from a character generation ROM is specified by cursor information whose display period is shorter than the blink period, and when the character information and cursor information overlap, a character display control circuit that outputs character information in reverse in accordance with the display period of the cursor information and outputs character information in normal rotation corresponding to the blink period of the cursor information; and a signal from the display control circuit is used as a background image signal. 1. A character insertion device comprising a character display output circuit for inserting a character into a character.