Video signal with contour adjustment processing apparatus

Details Video signal with contour adjustment processing apparatus Video signal with contour adjustment processing apparatus

1998-03-27

1999-09-28

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348630, 348649, 348253, 348 26, H04N 5208

Patent

active

059596945

ABSTRACT:
An apparatus for processing a video signal by adjusting the contour of a picture. The apparatus includes an arrangement from a delay circuit 2 to a subtraction circuit 5 for extracting a contour of the picture and generating at least a signal opposite in polarity to a contour enhancement signal enhancing the extracted contour. The signal polarity is continuously varied from a maximum value of a positive polarity to a maximum value of an opposite polarity by a variable resistor RV2, an output of which is added to the input video signal by an addition circuit 6. With the processing apparatus, a picture can not only be raised in resolution as felt by the viewer, that is can be enhanced in contour, but also can be lowered in resolution as felt by the user, that is can be softened in contour. A corresponding method for processing a video signal by adjusting the contour of a picture and a video camera having the apparatus for processing the video signal in this manner are also disclosed.

REFERENCES:
patent: 4081836 (1978-03-01), Skinner
patent: 4386434 (1983-05-01), Gibson
patent: 4506293 (1985-03-01), Hurst, Jr.
patent: 5103299 (1992-04-01), Asaida
patent: 5446502 (1995-08-01), Lebowsky
patent: 5574513 (1996-11-01), Topper

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