Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Patent
1996-03-11
1998-04-14
Peng, John K.
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
348190, 348806, H04N 1700
Patent
active
057398704
ABSTRACT:
A interpolation engine is disclosed that is capable of generating correction signals for segments of a monitor that form a gradient that eliminates any visual discontinuities between segments on the screen. In one embodiment, a starting count number for a distortion signal is stored in RAM, together with an increment rate signal that indicates the rate of change of the correction signal down the segment. In another embodiment, the increment rate signal is automatically calculated by the device by taking the difference between the starting count numbers for vertically adjacent segments. Since the number of rows in each segment is known and the difference between the starting count numbers of vertically adjacent segments is determined, the amount of correction for each row within a segment is calculated and provided as a correction signal. Hence, a correction signal can be provided for each row of pixels on a screen. This information can be integrated to form a smooth correction signal or need not be integrated for vertical geometry corrections since a correction signal is provided for each row. The present invention only requires a minimal amount of storage of data and is capable of providing correction signals for each row of pixels.
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Cochran II William W.
Display Laboratories Inc.
Murrell Jeffrey S.
Peng John K.
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