JPS5972284A - Digital x-ray television device - Google Patents

Abstract

PURPOSE:To display a character at a blank part and to prevent picture display from disappearing by displaying the character at an aspect ratio different from that at photography. CONSTITUTION:A TV camera 1 takes a photograph at a specified aspect ratio 1/1. A signal from the camera 1 is converted by an A/D converter 2 into a digital signal to store in a picture memory. Picture data is inputted to line buffers 5 and 6 and the data stored therein are sent to a D/A converter 15 at an aspect ratio (4/3) different from said ratio. The output of the converter 15 is displayed on a picture display device 16 at the specific aspect ratio (1/1) as it is. A character signal from a character generator 14 is sent to the device 16 through the converter 15 to display the character at the blank part of the display screen.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital X-ray television device, and particularly to a digital X-ray television device that can describe characters without hiding images displayed on a display unit.

Conventionally, X-ray television equipment has an aspect ratio of 1:1 in order to capture the output image of an X-ray image intensifier.
I have to. Therefore, when Kirafuta is displayed on the screen displayed on the display section, there is a problem in that the character is displayed on the displayed image and that part becomes invisible. In order to solve this problem, if the aspect ratio is set to 4:3, for example, the band of the X-ray television equipment will expand and the S/
N deteriorates. Furthermore, high-speed image memory elements and the like are also required.

It is an object of the present invention to solve the problems of the conventional digital X-ray television apparatus, and to perform digital
Our objective is to provide line television equipment.

The present invention has been made to achieve the above object, and its features include two line buffers 7 provided between the image memory and the digital-to-analog converter; The above-mentioned rifle has a switching device that alternately inverts the input and output.

The present invention is provided with a circuit for controlling the reading or writing speed of the file.

Hereinafter, the present invention will be described in detail along with examples.

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention.

In the figure, 1 is a television camera that captures the output image of the X-ray image inch/siffer, 2 is an analog-to-digital converter that converts the video signal from the television camera 1 into a digital signal, and 6 is the output of the analog-to-digital converter 2. 4 is a first address generator that generates read and write addresses for image memory 3; 5 is a first line bar; 7.6 is a second line bar; A first switch for alternately feeding the first and second line bars, F 5 and 6; 8, the first and second line bars;
This is a second switch for alternately sending out the data of F, 5 and 6, and is selected so that the first and second line bars, F 75 and 6 are connected in reverse, respectively, in synchronization with the first switch 7. It is switched. 9 is a third switching device such as a multiplexer for switching the reading or writing speed of the first and second line bars, 5 and 6; 10 is a television camera 1;
First address generator4. First switch 7. A first timing generator that generates a timing clock for controlling the second switch 8 and the third switch 9, respectively; 11 is a second address generator that generates a read address of the memory in the character generator; 12 is a second timing generator that generates a timing clock for controlling the second address generator 11; 16 is a first and second timing generator 10;
and 12, the first and second
This creates synchronization between timing generators 10 and 12. 14 is a character generator, 15 is a digital-to-analog converter, and 16 is an image display device.

Next, the operation of this embodiment will be explained with reference to FIG.

The output image of the X-ray image 2 intensity fire is photographed with a television camera 1 at a predetermined aspect ratio, for example, 1:1. The control signal C at this time is generated by the first timing generator 10. A video signal from a television camera 1 is converted into a digital signal by an analog-to-digital converter 2, and is captured and stored in an image memory 6 at a predetermined aspect ratio, for example, 1:1. The capture address of the image memory B is calculated by the first address generator 4 from the control signal. In order to read out the image data stored in the image memory 3, the image data selected by the first address generator 4 is transferred through a first switch 7 to the first one at a predetermined aspect ratio, for example at a 1:1 speed. It is input to line buffer 5.

On the other hand, while inputting image data to the first line buffer 5, the image data stored in the second line buffer 6 is input to the digital-to-analog converter 15 through the second switch 8 at a predetermined times the input speed. For example, it is sent 4/3 times faster and with an aspect ratio of 4:3. This control is performed by the timing clock generated by the second timing generator 12.

Next, the image data stored in the first line bar 5 is transmitted at a predetermined times, for example, 4/3 times the input speed, by reversing the connections between the first switch 7 and the second switch 8. and is sent to the digital-to-analog converter 15. This control is also performed at the timing generated by the second timing generator 12, similar to the readout control of the second line bar and filter 6. The output of the digital-to-analog converter 15 is displayed at the center of the screen of the image display device 16 with a predetermined aspect ratio, for example, 1:1.

Further, the reading specification of the memory of the character generator 14 is performed by the address calculated by the second address generator 11 which is controlled by the second timing generator 12,
The character signal read from this memory is sent to a digital-to-analog converter 15, converted into an analog signal, and then sent to an image display device 16, where the character is displayed at a predetermined position on the display screen, for example, in a margin.

Also, 1st. The synchronization of second timing generators 10 and 12 is controlled by a synchronization signal from controller 16.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without changing the gist thereof. For example, it goes without saying that the present invention can also be applied to an X-ray television set having a subtract function.

As explained above, according to the present invention, for example, as shown in FIG. I displayed it in A with an aspect ratio of 1:1, and displayed the character in the horizontal margin I3, so
Characters can be displayed without hiding a display image and without deteriorating S/N. Fortunately, there is no need for high-speed image memory elements, etc.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention in a professional manner, and FIG. 2 is a diagram showing a display screen of this embodiment. 1 TV camera, 2 Analog-digital converter, 6
image memory, 4 first address generator, 5 first line/
B, F7.6, second line bar, F7.7 first switch,
8 second switch, 9 third switch, 10 first timing generator, 11 second address generator, 12 second timing generator, 16 controller, 14 character generator, 15 digital-to-analog converter, 16 image display Device. Agent Patent Attorney Aki 1) Shu Ki

Claims (1)

[Claims] In a digital X-ray television device having an image memory,
two line buffers 7 provided between the image memory and the digital-to-analog converter, a switch that alternately inverts the input and output of each input buffer, and reading of the line buffer; A digital X-ray television device characterized by comprising a circuit for controlling the speed of signature.