JPH04196890A - Transmitting position display system for still picture transmitting device - Google Patents

Abstract

PURPOSE:To display the transmitting position of a still picture with a simple constitution by providing a transmission reading part and a position display signal generating part to control so that a video switching part may select the signal of fixed level or so as to be a non-selecting state during a signal period. CONSTITUTION:A video signal from a camera is switched by a video switching part 1, is displayed on a monitor moving picture 2, after that, is converted into a digital signal by an A/D converting part 3 and is written in a memory 4. At transmitting, the signal is read by a transmission reading part 5 and is transmitted to a receiving side. Then, since the video switching part 1 and the monitor of moving picture 2 are not used at transmitting a still picture, a transmitting position is displayed by black line on the screen of the monitor of moving picture 2 by making the switching of the video switching part 1 invalid by a transmitting position display signal from a position display signal generating part 6. Thus, the position transmitted by the still picture can be displayed on the monitor of moving picture without providing a television rate reading part, a D/A converting part and a monitor of still picture.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for displaying the position currently being transmitted on the transmitting side on a monitor screen in a still image transmitting apparatus.

[Summary of the invention]

In a still image transmission device, the present invention focuses on the fact that the video switching unit and the video monitor are not used during still image transmission, and controls the video switching unit to send a still image on the video monitor screen. According to the present invention, it is possible to display the still image transmission position even without a television rate succession unit, a D/A converter, and a still image monitor.

[Conventional technology]

What is the transmission position display method of conventional still image transmission equipment?

A still image written in a memory on the transmitting side is read out at television rate, and a transmission position display signal is mixed with this signal. That is, FIG. 2 is a block diagram showing a conventional transmission position display method. In the figure, 1 is a video switching unit, 2 is a video monitor, 3 is an A/D converter, 4 is a memory, 5 is a transmission readout unit, 6 is a position display signal generation unit, 7 is a television rate succession unit, 8 is a D/A converter, and 9 is a still image monitor.

The transmission position display method according to the above configuration will be briefly explained. First, video signals from multiple cameras are switched by the video switching unit 1, the necessary system is selected, and the video signal is displayed on the video monitor 2.
After being displayed, it is converted into a digital signal by the A/D converter 3 and written into the memory 4. This signal is transmitted to the receiving side by the transmission readout section 5, read out by the television rate succession section 7, and then transmitted to the position display signal generation section 6.
The transmission position display signals sent from the D/A converter 8 are mixed and converted into analog signals by the D/A converter 8, and then displayed on the still image monitor 9.

In the above, the horizontal line signal of the image being transmitted is sent from the transmission readout section 5 to the position display signal generation section 6, and when it matches the horizontal drive signal of the monitor 9, the 9 position display signal is sent to the television rate continuous output section. It is set to be sent to 7th.

[Problems to be Solved by the Invention] However, in the transmission position display method of the conventional still image transmission device, in order to display the still image on the monitor, this monitor, a TV rate readout section, and a D/A conversion section are required. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to display the transmission position of a still image with a simple configuration.

[Means to solve the problem]

In order to achieve the above object, the present invention focuses on the fact that the video switching section and the video monitor are not used during still image transmission, and controls the video switching section using the output of the position display signal generation section. In addition, the position of the still image being sent is displayed on the video monitor screen.

[Effect]

As a result, the position where the still image is being sent can be displayed on the moving image monitor without providing a television rate succession unit, a D/A converter, and a still image monitor.

〔Example〕

Two embodiments of the present invention will be described below with reference to FIG. In the figure, 1 is a video switching unit, 2 is a video monitor, and 3 is an A
4 is a memory, 5 is a transmission readout section, and 6 is a position display signal generation section.

The transmission position display method according to the above configuration will be explained. The video signal from the camera is switched by a video switching section 1, displayed on a moving image monitor 2, converted into a digital signal by an A/D conversion section 3, and written into a memory 4. During transmission, this signal is read out by the transmission reading section 5 and transmitted to the receiving side.

At this time, since the video switching section 1 and the video monitor 2 are not used during still image transmission, the switching of the video switching section 1 is disabled (no selection) using the transmission position display signal from the 9 position display signal generation section 6. By doing so, the transmission position is displayed as a black line on the screen of the video monitor 2.

Next, details of the transmission position display method will be explained with reference to FIG. In the figure, 1 is a video switching section, 6 is a position display signal generation section, 10 is a pulse generation section, 11 is a horizontal line counter, 12 is a comparison section, and 13 is a transmission line counter. First, the horizontal line signal from the transmission readout unit 5 is sent to the transmission line counter 13, and the value obtained by counting the transmission lines here.

The comparison unit 12 compares the values counted by the horizontal line counter 11 of the horizontal drive signal of the television, and when they become the same value, the pulse generation unit 10 generates a pulse with a width corresponding to the length of the cursor that displays the transmission position. occurs. Next, this signal is applied to the video switching section 1.

During this period, a black line is displayed by leaving the video switching section unselected.

In the above embodiment, the switching of the video switching section 1 is disabled (no selection is made) using the transmission position display signal, but it is also possible to select an input connected to a predetermined level, for example, the black level. .

[Effects of the Invention] According to the present invention, there is no need to provide a TV rate successive unit, a D/A converter, and a still image monitor.

On the video switching section and video monitor that are not being used during transmission,
You can display the location of the image being sent as a still image.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the transmission position display method of a still image transmission device according to the present invention, FIG. 2 is a block diagram showing a conventional transmission position display method, and FIG. It is a block diagram showing details. 1: Video switching section, 2: Video monitor, 3: A/D conversion section, 4: Memory, 5: Transmission reading section, 6: Position display signal generation section, 7: TV rate reading section. 8: D/A conversion section, 9: Still image monitor, 10: Pulse generation section, 11: Horizontal line counter, 12: Comparison section, 13: Transmission line counter. Arithmetic 10

Claims (1)

[Claims] 1. A video switching section that can select one input from a plurality of video signal inputs, a monitor that displays the selected video signal, an A/D conversion section that converts the video signal into a digital signal, and an A/D conversion section that converts the converted digital signal. a transmission readout section that reads out and transmits the stored digital signals; a signal indicating the position of the horizontal scanning line of the image being transmitted is obtained from the transmission reading section; a still image, comprising: a position display signal generating section that generates a pulse signal of a required width when the timings match, and controls the video switching section so that the signal at a predetermined level is selected or is in a non-selected state during the signal period; Transmission position display method for transmission equipment.