JPS6234494A - video signal processing equipment - Google Patents

Abstract

PURPOSE:To recognize a sampling point with the same color as a sampling signal by outputting a signal having a relative relation to a sampling pulse in a chrominance signal sampling means. CONSTITUTION:One signal among an R signal 1, a G signal 2 and a B signal 3 is selected by the control of a select signal 4 in a selector 6, sampled by the control of an S/H pulse 5 in a sample/hold (S/H) circuit 7 to obtain the sample data 8. A selector 9 operates so as to input the S/H pulse 5 to an adder to which the chrominance signal selected by the selector 6 through the control of the select signal 4 is inputted and among output signals 13-15 of adders 10-12, to a signal corresponding to the same color as the chrominance signal sampled in the S/H circuit 7, the S/H pulse is added as a cursor signal. The signals 13-15 are inputted to a monitor TV or the like, and in the monitor TV, a sample point (area) in a video signal picture is displayed by the cursor of the sampled color.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal processing device that samples a video signal.

[Prior Art] Conventionally, for example, R, G, and B signals as video signals are A/
Sampling devices for D conversion are known.

[Problems to be Solved by the Invention] However, in such a sampling device, the sample points are connected to video signal display means (for example, CR
I could not tell which location corresponded to the screen of T). Also, it was not clear which color signal was being sampled.

[Means for Solving the Problems] The present invention provides, when A/D converting and sampling video signals such as R, G, and B signals, the location of sampling in the image of the video signal and the location of the sampled signal. The purpose of the present invention is to provide a video signal processing device that allows color discrimination to be confirmed on a display means such as a monitor TV.
For this purpose, the apparatus includes sampling means for sampling one color value number, and signal generation means for outputting a signal having a relative relationship to the sampling pulse in the sampling means to the display means.

[Example] An embodiment of the present invention will be described below with reference to FIG.

R (Red) signal 1, G (Gree) as a video signal
n) 2 and B (Blue) signal 3 to selector 6
The selector 6 selects one of these input signals under the control of the select signal 4 and outputs it. Sample the output signal from selector 6/
It is input to the hold (S/H) circuit 7, where it is sampled under the control of the S/H pulse 5, and the sample data 8
get.

Also, R signal 1. G signal 2 and B signal 3 are sent to adder 1
0.11 and 12 are respectively input to one input terminal. Further, the S/H pulse 5 is inputted via the selector 9 to the other input terminal of each of the adders 10, 11 and 12. The selector 9 sends S/ to an adder into which the color signal selected by the selector 6 is input under the control of the select signal 4.
It operates to input H pulse 5. Therefore, the output signals 13, 14.15 of adders 10.11 and 12
Of these, the S/H pulse is added to a signal corresponding to the same color as the color signal sampled by the S/H circuit 7 as a cursor signal. These output signals 13, 14, and 15 are input as monitor output signals to a monitor TV or the like. As a result, on the monitor TV, sample points (regions) in the video signal image are displayed with a cursor of the sampled color.

Although this embodiment shows an example of sampling R, G, and B signals as video signals, the present invention also applies to Y, RY, and BY signals, and Y, I, and Q signals. It goes without saying that the invention is applicable.

[Effects of the Invention] As described above, according to the present invention, sampling points can be confirmed in the same color as the signal being sampled on, for example, a monitor TV.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 7...S/H circuit, 9...Selector, 10.11.12... Adder.

Claims (1)

[Claims] A video signal processing device comprising: sampling means for sampling a color signal; and signal generation means for outputting a signal having a relative relationship to the sampling pulse in the sampling means to a display means. .