Video processing device, video processing method, and video processing program

Abstract

Frame memories for delaying an input video signal for one frame respectively are connected in series. A dot interference detecting device detects variation between the input video signal and the delayed signals delayed for different frames of a pixel at the same position on a screen. When a dot interference is detected, a dot eliminating device eliminates the dot interference.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a video processing device according to a first embodiment of the present invention;

FIG. 2 is a block diagram of a dot interference detecting device of the video processing device shown in FIG. 1;

FIG. 3 is an explanatory view of a change in a time direction corresponding to a specific pixel of a color subcarrier;

FIG. 4 is a block diagram of a dot interference eliminating device of the video processing device shown in FIG. 1;

FIG. 5 is a block diagram of the video processing device according to a second embodiment of the present invention;

FIG. 6 is a block diagram of the video processing device according to a third embodiment of the present invention;

FIG. 7 is a block diagram of a cross color detecting device of the video processing unit shown in FIG. 6;

FIG. 8 is a block diagram of the video processing device according to a fourth embodiment of the present invention;

FIG. 9 is a block diagram of a computer of the video processing device according to a fifth embodiment of the present invention;

FIG. 10 is a flow chart used for detecting and eliminating the dot interference of a video processing program running on the computer of the video processing device shown in FIG. 9; and

FIG. 11 is a flow chart used for detecting and eliminating the cross color of a video processing program running on the computer of the video processing device shown in FIG. 9.

Claims

1. A video processing device for eliminating a noise from a component signal which is attained by separating a brightness signal and a color signal from a composite signal, said video processing device comprising: a noise detecting device for detecting a noise of a pixel based on a plurality of signals of a same pixel in component signals in different times; anda noise eliminating device for eliminating the noise detected by the noise detecting device.

2. The video processing device as claimed in claim 1, further comprising a delaying device for delaying the component signal for at least one frame, wherein the noise detecting device detects the noise based on a variation of a same pixel between a direct-inputted component signal and a delayed component signal via the delaying device.

3. The video processing device as claimed in claim 2, wherein the noise detecting device detects the noise based on the variation of a plurality of component signals at the same pixel delayed for different frames by the delaying device.

4. The video processing device as claimed in claim 1, wherein the noise detected by the noise detecting device and eliminated by the noise eliminating device is a dot interference or a cross color generated by separating a brightness signal and a color signal from a composite signal.

5. The video processing device as claimed in claim 4, wherein the noise detecting device detects the dot interference using only the brightness signal of the component signal, and the noise eliminating device eliminates the dot interference.

6. The video processing device as claimed in claim 4, wherein the noise detecting device detects the cross color using both the brightness signal and the color signal of the component signal, and the noise eliminating device eliminates the cross color.

7. A video processing method for eliminating a noise from a component signal which is attained by separating a brightness signal and a color signal from a composite signal, said method comprising a step of detecting and eliminating a noise of a pixel based on a plurality of signals of the same pixel in component signals in different times.

8. The video processing method as claimed in claim 7, further comprising the steps of: delaying the component signal for at least one frame; anddetecting the noise based on a variation of a same pixel between a direct-inputted component signal and a delayed component signal via the delaying device.

9. A video processing program for operating a computer of a video processing device for eliminating a noise from a component signal which is attained by separating a brightness signal and a color signal from a composite signal, said program comprising the steps of:detecting a noise of a pixel based on a plurality of signals of the same pixel in component signals in different times; andeliminating the noise detected by the noise detecting step.