JPH06178168A - Data display device - Google Patents

Abstract

PURPOSE:To set date at an arbitrary position and to photograph the date without superimposing on an object by providing a means which varies the display position of the data of a date display device for a video camera. CONSTITUTION:A horizontal synchronizing signal (d) is detected from a video signal (a) at a horizontal synchronizing signal detection circuit 10, and a vertical synchronizing signal (e) at a vertical synchronizing signal detection circuit 11, respectively, and they are inputted to a timing control circuit 3. The circuit 3 can vary the timing of the signals (d), (e) separately, and the change of the display position can be performed by varying the timing of the signal (d) when it is desired to vary in a right or left direction, and varying that of the signal (e) when it is desired to vary in an up or down direction. Timing quantity can be controlled by a timing control switch 4, and an operator performs an operation while observing the date position of a monitor. A date generation circuit 5 inputting the synchronizing signal generates the date set by a date setting switch 6 at a constant timing for the synchronizing signal, and outputs it as a date signal (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a date display device for a video camera, which is suitable for adding the date of photographing to a video signal.

[0002]

2. Description of the Related Art A video camera has a function of superimposing a date (year, month, day and time) at the time of shooting as a character signal on a video signal and displaying it on a screen. This is generally called an on-screen display or a superimpose function, and when the date is recorded together with the subject, it is convenient to know the date and time of shooting at a glance.

As a display device, for example, Japanese Patent Laid-Open No. 1-71
There is a display circuit shown in Japanese Patent No. 280. As shown in this example, in the conventional technique, the emphasis is placed only on displaying the date and stabilizing the display, and no consideration has been given to the balance or overlap between the subject and the date display.

[0004]

However, in the conventional date display device, since the display position is fixed,
The date sometimes overlapped on the subject I shot.

An object of the present invention is to provide a date display device for changing the display position of the date so that the date does not overlap the subject and realizing a screen that is easy to see.

[0006]

In order to achieve the above object, the present invention provides means for varying the timing of a sync signal detected from a video signal serving as a reference for a date display position and a display position for a desired date. And means for inputting.

In another means, means for changing the timing until the date signal is generated is provided for the synchronization signal.

[0008]

The function of the present invention will be described.

When adding a date to an image taken by a video camera, a sync signal is detected from the image signal and the date is displayed with this as a reference. The date display position can be changed by changing the timing of the detected synchronization signal and using it as a reference for displaying the date. Further, the timing of the detected sync signal is externally controlled to display the date at an arbitrary position.

The operation of another means is to move the date position by fixing the timing of the sync signal detected from the video signal and changing the timing until the date signal is generated with the sync signal as a reference.

[0011]

EXAMPLE An example of the present invention will be described below with reference to FIG.

FIG. 1 is a block diagram of a video camera system using the date display device of the present invention. 1 is a video camera, 2 is a sync signal detection circuit, 3 is a timing control circuit, 4 is a timing control switch, 5 is a date generation circuit,
6 is a date setting switch, 7 is a date adding circuit, 8 is a monitor, 9 is a date display device of the present invention, a is a video signal, b is a date signal, and c is a video signal after date addition.

The video signal a from the video camera 1 is input to the sync signal detection circuit 2, the sync signal is detected, and the detected sync signal is input to the timing control circuit 3. The timing control circuit 3 changes the timing of the synchronization signal which is the reference of the date display position, and inputs it to the date generation circuit 5. In the date generation circuit 5, the date signal set by the date setting switch 6 is output to the date addition circuit 7 at the timing based on the synchronization signal after the timing change. The date adding circuit 7 adds the date signal b to the video signal a to generate the video signal c.

When changing the date display position, the video signal c
Is monitored by the monitor 8 and the date display position is confirmed, and the timing control circuit 3 is controlled by using the timing control switch 4. This operation will be described in detail with reference to FIG.

FIG. 2 shows a date display device corresponding to 9 in FIG. Reference numeral 10 denotes a horizontal synchronization signal detection circuit 11, reference numeral 11 denotes a vertical synchronization signal detection circuit, d denotes a horizontal synchronization signal, and e denotes a vertical synchronization signal.

From the video signal a, the horizontal synchronizing signal detecting circuit 10 detects the horizontal synchronizing signal d, and the vertical synchronizing signal detecting circuit 11 detects the vertical synchronizing signal e, which are input to the timing control circuit 3. The timing control circuit 3 can change the timings of the horizontal synchronizing signal d and the vertical synchronizing signal e separately. When changing the horizontal display position, the timing of the horizontal synchronizing signal d is changed, and when changing the vertical display position. Is performed by changing the timing of the vertical synchronizing signal e. The timing control switch 4 controls this timing amount.
The user operates while watching the date position on the monitor 8. In the date generation circuit 5 to which the sync signal is input, the date set by the date setting switch 6 is generated at a fixed timing with respect to the sync signal and is output as the date signal b.

The timing relationship between the date display position and the sync signal will be described with reference to FIG. FIG. 3 shows the relationship between the date display position on the monitor and the sync signal. Reference numerals 12 and 12 'denote date display positions, and d and d'represent horizontal sync signals.

When the horizontal synchronizing signal is at the timing d, the date is at the date display position 12. If it is desired to move to the date display position 12 'when the display position overlaps with the subject, the display position is moved by changing the timing to the timing of the horizontal synchronizing signal d'by the timing control circuit. The movement of the display in the vertical direction is the same, and is performed by controlling the timing of the vertical synchronizing signal. Furthermore, by combining the timing control of the horizontal synchronizing signal and the vertical synchronizing signal, the date can be displayed at any position on the monitor.

When actually changing the screen display position of the date, as shown in FIG. 4, if several preset display positions are determined in advance and selected from them, control becomes simple and convenient. Will get better.

Another embodiment of the present invention will be described with reference to FIG. FIG. 5 is a block diagram of a date display device using a control circuit, where 13 is a control circuit and f is timing information.

The sync signal detected by the sync signal detection circuit 2 from the video signal a is input to the date generation circuit 5. In the date generation circuit 5, the date signal is generated based on the synchronization signal, but in the present embodiment, the date display position can be moved by changing the timing from the synchronization signal to the date signal generation. This timing is controlled by the timing control switch 4 controlling the control circuit 13 and the timing information f.

The horizontal display position on the monitor is determined by the timing from the horizontal synchronizing signal to the date signal generation,
The timing is given by the timing information f.
This timing may be determined by, for example, providing the date generation circuit 5 with a transmission circuit and the number of times of the clock.
At this time, the timing information f is the number of clocks from the horizontal synchronizing signal to the date signal generation. Further, the display position in the vertical direction is determined by, for example, the number of horizontal synchronization signals to be displayed from the vertical synchronization signal, and the timing information f at this time is the number of horizontal synchronization signals. A microcomputer may be used as the control circuit 13 that gives the timing information f.

The date signal 6 generated as described above
Since the horizontal position and the vertical position on the monitor are controlled, the date can be displayed at any position. Also in this embodiment, when actually changing the screen display position of the date, as shown in FIG. 4, it is possible to improve the usability by deciding some display planned positions in advance.

Thus, according to the present invention, the date can be displayed at an arbitrary position so that the date does not overlap the subject.

[0025]

As described above, according to the present invention,
Since the date can be set at any place during shooting with the video camera, good shooting can be performed without the date being overlaid on the subject.

[Brief description of drawings]

FIG. 1 is a block diagram of a video camera system using a date display device of the present invention.

FIG. 2 is a block diagram of a date display device.

FIG. 3 is a diagram showing a timing relationship between a date display position and a synchronization signal.

FIG. 4 is a diagram showing a position of date display.

FIG. 5 is a block diagram of a date display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Video camera, 2 ... Sync signal detection circuit, 3 ... Timing control circuit, 4 ... Timing control switch, 5 ... Date generation circuit, 6 ... Date setting switch, 7 ... Date addition circuit,
8 ... Monitor, 9 ... Date display device of the present invention, 10 ... Horizontal sync signal detection circuit 11 ... Vertical sync signal detection circuit, 12, 12 '... Date display position, 13 ... Control circuit, a ... Video signal, b ...
Date signal, c ... Video signal after date addition, d, d '... Horizontal sync signal, e ... Vertical sync signal, f ... Timing information.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Ishikawa 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Stock Company, Hitachi Image Information Systems (72) Inventor Hiroyuki Katsurai 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi Image Information System (72) Inventor Minoru Kikuchi 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Stock Company Hitachi Image Information System (72) Inventor Tetsuya Amano 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi Image In the information system (72) Inventor Masahiko Kudo 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Stock company Hitachi Image Information System

Claims (1)

[Claims] 1. A date display device for a video camera, comprising means for changing the display position of the date.