Sharpness control for a television image
AssigneeRCA Licensing Corporation
InventorsTerrence R. Smith, Michael A. Isnardi
Life of this patent
Estimating the term…
Abstract
A video signal processing system includes a signal interpolator associated with time compression/expansion apparatus. The interpolator is preceded by a high frequency peaking network which responds to a variable control signal representative of a desired amount of displayed image sharpness. In a disclosed embodiment the peaking network responds to a control signal which is a function of a distance between image pixels, and a variable signal from a viewer adjustable image sharpness control.
Claims5
In a system for processing a video signal containing picture element image information to be displayed, apparatus for modifying the high frequency response of said video signal comprising:
- a video signal interpolator having an input and an output and disposed in a path conveying said video signal;
- a peaking processor disposed in said video signal path for modifying the high frequency reponse of a video output signal from said interpolator;
- an image sharpness processor for generating a variable sharpness control signal including a sharpness control first component independent of distance between pixels and a second components representative of a distance between pixels;
- and
- means for applying said sharpness control signal to said peaking processor for controlling the operation thereof to variably modify said high frequency response so that said high frequency response varies as a function of both said first and second components.
Dependencies are inferred from the claim text.