Method and apparatus for video signal resolution enhancement
AssigneeAtari, Inc.
InventorsKurt F. Wallace, Greg G. Frye, David A. Grayson
Life of this patent
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Abstract
The resolution of relatively low resolution type information signals is enhanced by inserting black level signals between adjacent picture elements at predetermined positions in each odd horizontal scanning line, and inserting black level signals between adjacent picture elements at different predetermined positions in even horizontal scanning lines. The black level signals are inserted by extinguishing a CRT beam in accordance with phase displaced clock signal trains, preferably phase displaced by 180.degree..
Claims12
A method of processing video-type information signals to improve the subjective resolution thereof when displayed on a video-screen, said method comprising the steps of:
- inserting black level signals between adjacent picture elements in a first preselected group of scanning lines at predetermined positions in each line;
- and
- inserting black level signals between adjacent picture elements in a second preselected group of scanning lines interlaced with the first preselected group at other predetermined positions.
A system for processing video-type information signals to improve the subjective resolution thereof when displayed on a video screen, said system comprising:
- input means for receiving said video-type signals in a line-by-line format;
- means for inserting black level signals between adjacent picture elements in each scanning line at regular intervals therealong;
- and
- means for inserting the black level signals in a first preselected group of scanning lines at first positions and in a second preselected group of scanning lines interlaced with the first group at other positions.
A method for electronically superimposing a diagonal black matrix on a raster scan display generated in response to a signal comprising the steps of:
- periodically blanking the video signal in a first group of scan lines at times associated with first positions;
- and
- periodically blanking the signal in a second group of scan lines interlaced with the first group of scan lines at times corresponding to second positions on the scan lines interlaced with the first positions along the scan axis.
Dependencies are inferred from the claim text.